• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    _16_ ABSTRACT OF THE DISCLOSURE A replaceable cutting insert includes a cutting insert body having a forward cutting face and an opposing rearWard base, an inlet coolant channel formed in the cutting insert body, afirst outlet coolant channel forrned in the cutting insert body and in fluid communication With theinlet coolant channel and a second outlet coolant channel formed in the cutting insert body and influid communication With the inlet coolant channel. The inlet coolant channel includes alongitudinal axis that is not axially aligned With either a first longitudinal axis of the first outletcoolant channel or a second longitudinal axis of the second outlet coolant channel. A rotarycutting tool incorporating the replaceable cutting insert is also provided. A method of making a replaceable cutting insert is also provided.
    公开号:SE1450266A1
    申请号:SE1450266
    申请日:2014-03-07
    公开日:2014-09-10
    发明作者:Neal S Myers；Juergen Schwaegerl
    申请人:Kennametal Inc；
    IPC主号:
    专利说明:

    [1] [0001] The invention pertains generally to a rotary cutting tool (e.g. a drill, a millingcutter, a reamer or similar device) having, for example, a tool shank or tool body and areplaceable or an exchangeable cutting insert made of or including at least one hard cuttingmaterial, e.g. a tungsten carbide cutting alloy, oxide ceramic or similar material. Moreparticularly, the invention pertains to a replaceable cutting insert with intemal channels formedtherein for delivering a coolant material and a related method for making the replaceable cuttinginsert having intemal channels formed therein.
    [2] [0002] During operation of a rotary cutting tool (eg. a drilling operation), substantialstresses are exerted on the various tool components. Therefore, the tool should be sufficientlystrong and durable. It is known to produce a replaceable cutting insert that can be inserted intothe body of the tool. The cutting insert, when sufficiently wom by use in a cutting operation, canbe removed and replaced with a new cutting insert. In the particular case of a drill, the cuttinginsert often contains the entire cutting end of the drill, including the drill tip, the cutting faces, thecutting edges, as well as portions of the chip flutes. Such a cutting insert is connected to the drillbody in a secure but removable fashion.
    [3] [0003] Also during operation of a rotary cutting tool (eg. a drilling operation), heat isgenerated at the interface between the cutting insert and the location where material is beingremoved from a workpiece (i.e., the insert-workpiece interface). It is well-known that excessiveheat at the insert-workpiece interface can negatively impact upon the usefiJl tool life of the cuttinginsert. As can be appreciated, a shorter usefial tool life increases operating costs and decreasesoverall production efficiency. Hence, there are readily apparent advantages connected withdecreasing the heat at the insert-workpiece interface. It is known to provide a coolant material tothe insert-workpiece interface to decrease the heat and increase the usefial tool life.
    [4] [0004] However, it will be appreciated that most known systems for providing a coolant material to the insert-workpiece interface are difficult and/or expensive to manufacture while still _ 2 _maintaining the overall integrity of the cutting tool components. Thus, it would be desirable to provide an improved rotary cutting tool and, in particular, an improved cutting insert thatovercomes limitations, shortcomings and/or disadvantages of known rotary cutting tools and cutting inserts.
    [5] [0005] In accordance with an aspect of the invention, a replaceable cutting insert includesa cutting insert body having a forward cutting face and an opposing rearward base and an inletcoolant channel formed in the cutting insert body and defining an inlet opening at the rearwardbase of the cutting insert body, the inlet coolant channel having a longitudinal axis. Thereplaceable cutting insert also includes a first outlet coolant channel formed in the cutting insertbody and in fluid communication with the inlet coolant channel, the first outlet coolant channeldefming a first outlet opening at the forward cutting face of the cutting insert body, wherein thefirst outlet coolant channel includes a first longitudinal axis that is not axially aligned with thelongitudinal axis of the inlet coolant channel. The replaceable cutting insert further includes asecond outlet coolant channel formed in the cutting insert body and in fluid communication withthe inlet coolant channel, the second outlet coolant channel defining a second outlet opening atthe forward cutting face of the cutting insert body, wherein the second outlet coolant channelincludes a second longitudinal axis that is not axially aligned with the longitudinal axis of the inletcoolant channel.
    [6] [0006] In accordance with another aspect of the invention, a replaceable cutting insertincludes: a cutting insert body having a forward cutting face and an opposing rearward base; afirst inlet coolant channel formed in the cutting insert body and defining a first inlet opening at therearward base of the cutting insert body, the first inlet coolant channel having a first longitudinalaxis; a second inlet coolant channel formed in the cutting insert body and defming a second inletopening at the rearward base of the cutting insert body, the second inlet coolant channel having asecond longitudinal axis; a first outlet coolant channel formed in the cutting insert body and influid communication with the first inlet coolant channel, the first outlet coolant channel defining afirst outlet opening at the forward cutting face of the cutting insert body, wherein the first outlet coolant channel includes a third longitudinal axis that is not axially aligned with the first _ 3 _longitudinal axis of the first inlet coolant channel; and a second Outlet coolant channel formed in the cutting insert body and in fluid communication with the second inlet coolant channel, thesecond outlet coolant channel defming a second outlet opening at the forward cutting face of thecutting insert body, wherein the second outlet coolant channel includes a fourth longitudinal axisthat is not axially aligned with the second longitudinal axis of the second inlet coolant channel.
    [7] [0007] In accordance with another aspect of the invention, a rotary cutting tool includes atool body having an axial forward end and an axial rearward end, the tool body defining a coolantchannel that extends therethrough from the axial rearward end to the axial forward end and areplaceable cutting insert structured and arranged for releasable attachment to the axial forwardend of the tool body. The replaceable cutting insert includes a cutting insert body having aforward cutting face and an opposing rearward base positionable adjacent the axial forward end ofthe tool body, and an inlet coolant channel formed in the cutting insert body and def1ning an inletopening at the rearward base of the cutting insert body, the inlet coolant channel having alongitudinal axis, wherein the inlet coolant channel is positionable to be in fluid communicationwith the coolant channel of the tool body. The replaceable cutting insert also includes a firstoutlet coolant channel formed in the cutting insert body and in fluid communication with the inletcoolant channel, the first outlet coolant channel defining a first outlet opening at the forwardcutting face of the cutting insert body, wherein the f1rst outlet coolant channel includes a f1rstlongitudinal axis that is not axially aligned with the longitudinal axis of the inlet coolant channel.The replaceable cutting insert further includes a second outlet coolant channel formed in thecutting insert body and in fluid communication with the inlet coolant channel, the second outletcoolant channel defining a second outlet opening at the forward cutting face of the cutting insertbody, wherein the second outlet coolant channel includes a second longitudinal axis that is notaxially aligned with the longitudinal axis of the inlet coolant channel
    [8] [0008] In accordance with yet another aspect of the invention, a method of making areplaceable cutting insert includes forrning a hard cutting material mixture, injecting the hardcutting material mixture into a die for forrning a replaceable cutting insert body having an inletcoolant channel in fluid communication with a first outlet coolant channel and a second outletcoolant channel, wherein the f1rst outlet coolant channel includes a first longitudinal axis that is not axially aligned with a longitudinal axis of the inlet coolant channel and the second outlet _ 4 _coolant channel includes a second longitudinal axis that is not axially aligned with the longitudinal axis of the inlet coolant channel. The method also includes remoVing the replaceable cuttinginsert body from the die. In one aspect, the method filrther includes configuring the die to includea first linear tooling element for forming the first outlet coolant channel, a second linear toolingelement for forn1ing the second outlet coolant channel and a third linear tooling element forforming the inlet coolant channel, wherein the first linear tooling element is interconnected withthe third linear tooling element and the second linear tooling element is interconnected with thethird linear tooling element. In another aspect, the method includes withdrawing the first andsecond linear tooling elements before removing the replaceable cutting insert body from the die.In yet another aspect, altematiVely the method includes withdrawing the first and second lineartooling elements after remoVing the replaceable cutting insert body from the die.
    [9] [0009] These and other aspects of the present inVention will be more fially understood following a reView of this specif1cation and drawings.
    [10] [0010] Figure l illustrates a rotary cutting tool, in accordance with an aspect of theinVention.
    [11] [0011] Figure 2 is a sectional View of the rotary cutting tool illustrated in Figure l, inaccordance with an aspect of the inVention.
    [12] [0012] Figure 3 is a sectional View of the rotary cutting tool body illustrated in Figure 2,in accordance with an aspect of the inVention.
    [13] [0013] Figure 4 is a sectional View of the replaceable cutting insert illustrated in Figure 2,in accordance with an aspect of the inVention.
    [14] [0014] Figure 5 is a top View of the rotary cutting tool and, in particular, the replaceablecutting insert illustrated in Figure l, in accordance with another aspect of the inVention.
    [15] [0015] Figure 6 is a sectional View of an additional replaceable cutting insert, inaccordance with an aspect of the inVention.
    [16] [0016] Figure 7A is a schematic representation of making a replaceable cutting insert, inaccordance with an aspect of the inVention.
    [17] [0017] Figure 7B is a schematic representation of making a replaceable cutting insert, in _ 5 _accordance with another aspect of the inVention.
    [18] [0018] The following description is for purposes of illustrating Various aspects of theinVention only and not for purposes of lin1iting the scope of the inVention.
    [19] [0019] Referring generally to Figures 1-5, there is illustrated a rotary cutting tool,generally designated as reference number 10, and components thereof in accordance with Variousaspects of the inVention. For illustration purposes only, rotary cutting tool 10 is shown in theforrn of a drilling tool but it will be appreciated that the inVention has application to Various kindsof rotary cutting tools (e.g., a milling cutter, a reamer or sirnilar deVice) usefiJl in Various kinds ofcutting operations.
    [20] [0020] Rotary cutting tool 10 includes a tool body12, in accordance with an aspect of theinVention. The tool body 12 includes an axial rearward end 14 and an axial forward end 16. Inthe example of the rotary cutting tool 10 being in the forrn of a drill, the tool body 12 may defmeone or more flutes 17 formed therein. The tool body 12 also includes a central longitudinal axisA-A which extends therethrough from the axial rearward end 14 to the axial forward end 16. Inone aspect, the central longitudinal axis A-A is also a central rotational axis of the rotary cuttingtool 10.
    [21] [0021] As shown in Figures 2 and 3, the tool body 12 defmes a coolant channel 18 thatextends therethrough from the axial rearward end 14 to the axial forward end 16. In one aspect,the coolant channel 18 is located at or adjacent the central longitudinal axis A-A of the rotarycutting tool 10, although it will be appreciated that the coolant channel 18 may be located at otherlocations in or throughout the tool body 12. The coolant channel 18 is conf1gured to provide fora coolant material to enter a coolant channel inlet 20 at or adjacent the axial rearward end 14 andflow through the coolant channel 18 to a coolant channel outlet 22 at or adjacent the axialforward end 16. The coolant channel 18 is illustrated as linear, but it will be appreciated that thecoolant channel 18 may be formed in other shapes or conf1gurations, e.g. helical.
    [22] [0022] As shown in Figures 1-2 and 4-5, the rotary cutting tool 10 fiJrther includes areplaceable cutting insert, generally designated as reference number 24, in accordance with an aspect of the inVention. The replaceable cutting insert 24 includes a cutting insert body 26 haVing _ 6 _a forward cutting face 28 and a generally opposing rearward base 30. The rep1aceab1e cutting insert 24 is structured and arranged for re1easab1e attachment to the axia1 forward end 16 of thetool body 12. In one aspect, the rep1aceab1e cutting insert 24 is re1easab1y attached to the axia1forward end 16 of the too1 body 12 by the rearward base 30 being structured and arranged forcooperating with a pocket 32 forrned in the axia1 forward end 16 of the too1 body 12. In oneaspect, the rep1aceab1e cutting insert 24 is re1easab1y attached to the axia1 forward end 16 of thetoo1 body 12 by mechanica1 connection. AdVantageous1y, this configuration a11ows for the cuttinginsert 24 to be easi1y and quickly attached and removed from the too1 body 12 once the cuttinginsert has been used and needs rep1aced due to wear.
    [23] [0023] The rep1aceab1e cutting insert 24 inc1udes a centra11ongitudina1axis B-B whichextends therethrough from the forward cutting face 28 to the opposing rearward base 30. In oneaspect, the centra1 1ongitudina1 axis B-B is a1so a centra1 rotationa1axis of the rep1aceab1e cuttinginsert 24.
    [24] [0024] Referring to Figures 2 and 4-5, the rep1aceab1e cutting insert 24 further inc1udes anin1et coo1ant channe134, a first out1et coo1ant channe1 36 and a second out1et coo1ant channe1 38a11 forrned in the cutting insert body 26, in accordance with an aspect of the inVention. The firstout1et coo1ant channe1 36 and the second out1et coo1ant channe1 38 are structured and arranged tobe in fluid communication with the in1et coo1ant channe134. The in1et coo1ant channe1 34 definesan in1et opening 40 at or adjacent the rearward base 40 of the cutting insert body 26. The firstout1et coo1ant channe1 36 def1nes an out1et opening 42 at or adjacent the forward cutting face 28of the cutting insert body 26. The second out1et coo1ant channe1 38 defines an out1et opening 44at or adjacent the forward cutting face 28 of the cutting insert body 26.
    [25] [0025] In one aspect, the in1et coo1ant channe1 34 is 1ocated at or adjacent the centra11ongitudina1axis B-B of the rep1aceab1e cutting insert 24, a1though it wi11 be appreciated that thecoo1ant channe1 34 may be 1ocated at other 1ocations in or throughout the cutting insert body 26.The in1et coo1ant channe1 34 is structured and arranged to be in fluid communication with thecoo1ant channe1 18 of the too1 body 12. In one aspect, the in1et opening 40 is positionab1eadjacent the coo1ant channe1out1et 22 of coo1ant channe1 18 so as to be in fluid communicationtherewith.
    [26] [0026] Thus, it wi11 be appreciated that the described and i11ustrated configuration of _ 7 _coolant channel 18, inlet coolant channel 34 and first and second outlet coolant channels 36, 38 provides for a coolant material to pass through the rotary cutting tool 10 and be delivered to theforward cutting face 28 of the replaceable cutting insert 24, i.e. to the insert-Workpiece interfaceto decrease the heat and increase the usefiJl life of the rotary cutting tool 10 and, moreparticularly, to increase the usefiJl life of the replaceable cutting insert 24.
    [27] [0027] As illustrated in Figure 4, the inlet coolant channel 34 includes a longitudinal axis,for example, axis X-X. In one example, the longitudinal axis X-X may be co incident With thecentral longitudinal axis B-B. In one example, the longitudinal axis X-X may extend in the samedirection as the central longitudinal axis B-B of the replaceable cutting insert 24. In addition, thefirst outlet coolant channel 36 includes a longitudinal axis, for example, axis Y-Y and the secondoutlet coolant channel 38 includes a longitudinal axis, for example, axis Z-Z.
    [28] [0028] In accordance With an aspect of the inVention, While the inlet coolant channel 34 isin fluid communication With the first outlet coolant channel 36, the longitudinal axis X-X of theinlet coolant channel 34 is not axially aligned With the longitudinal axis Y-Y of the first outletcoolant channel 36. In another aspect, the inlet coolant channel 34 is linear and the first outletcoolant channel 36 is linear and the inlet coolant channel 34 and the first outlet coolant channel 36are not axially aligned.
    [29] [0029] In accordance With an aspect of the inVention, While the inlet coolant channel 34 isin fluid communication With the second outlet coolant channel 38, the longitudinal axis X-X of theinlet coolant channel 34 is not axially aligned With the longitudinal axis Z-Z of the second outletcoolant channel 38. In another aspect, the inlet coolant channel 34 is linear and the second outletcoolant channel 38 is linear and the inlet coolant channel 34 and the second outlet coolant channel38 are not axially aligned.
    [30] [0030] Still referring to Figure 4, another aspect of the inVention is that the first outletcoolant channel 36 extends at an angle M relatiVe to the inlet coolant channel 34. In other Words,the longitudinal axis Y-Y of the first outlet coolant channel 36 extends at the angle M relatiVe tothe longitudinal axis X-X of the inlet coolant channel 34. The angle M may be, for example, inthe range of about 90 degrees to about 160 degrees.
    [31] [0031] Yet another aspect of the inVention is that the second outlet coolant channel 38 extends at an angle N relatiVe to the inlet coolant channel 34. In other Words, the longitudinal _ g _axis Z-Z of the second outlet coolant channel 38 extends at the angle N relatiVe to the longitudinal axis X-X of the inlet coolant channel 34. The angle N may be, for example, in the range of about90 degrees to about 160 degrees.
    [32] [0032] In another aspect of the inVention, the longitudinal axis Y-Y of the first outletcoolant channel 36 is not axially aligned With the longitudinal axis Z-Z of the second outletcoolant channel 38. In another aspect of the inVention, the longitudinal axis Y-Y of the firstoutlet coolant channel 36 is positioned at an angle P relatiVe to the longitudinal axis Z-Z of thesecond outlet coolant channel 38. The angle P may be, for example, in the range of about 20degrees to about 180 degrees.
    [33] [0033] Referring to Figure 6, there is illustrated an additional replaceable cutting insert124, in accordance With additional aspects of the inVention. The replaceable cutting insert 124 issimilar in most aspects to the replaceable cutting insert 24 described herein, but the replaceablecutting insert 124 fiJrther includes a f1rst inlet coolant channel 134 (def1ning opening 140) in fluidcommunication With a f1rst outlet coolant channel 136 (defining opening 142) and a second inletcoolant channel 137 (defining opening 143) in fluid communication With a second outlet coolantchannel 138(defming opening 144) all formed in the cutting insert body 126. In one aspect thefirst inlet coolant channel 134 is parallel to the second inlet coolant channel 137. In anotheraspect, the f1rst inlet coolant channel 134 (having central longitudinal axis X1-X1) and the secondinlet coolant channel 137 (haVing central longitudinal axis X2-X2) are parallel and offset from thecentral longitudinal axis B-B (Which can also be a central rotational axis of the replaceable cuttinginsert 124 ) of the replaceable cutting insert 124.
    [34] [0034] Still referring to Figure 6, the f1rst outlet coolant channel 136 includes alongitudinal axis, for example, axis Y-Y and the second outlet coolant channel 138 includes alongitudinal axis, for example, axis Z-Z. In accordance With an aspect of the inVention, While theinlet coolant channel 134 is in fluid communication With the f1rst outlet coolant channel 136, thelongitudinal axis X1 -X1 of the first inlet coolant channel 134 is not axially aligned With thelongitudinal axis Y-Y of the f1rst outlet coolant channel 136. In another aspect, the first inletcoolant channel 134 is linear and the first outlet coolant channel 136 is linear and the first inletcoolant channel 134 and the f1rst outlet coolant channel 136 are not axially aligned.
    [35] [0035] In accordance With an aspect of the inVention, While the second inlet coolant _ 9 _channel 137 is in fluid communication With the second outlet coolant channel 138, the longitudinal axis X2-X2 of the second inlet coolant channel 137 is not axially aligned With the longitudinal axisZ-Z of the second outlet coolant channel 138. In another aspect, the second inlet coolant channel137 is linear and the second outlet coolant channel 138 is linear and the second inlet coolantchannel 137 and the second outlet coolant channel 138 are not axially aligned.
    [36] [0036] In another aspect of the inVention, the f1rst outlet coolant channel 136 extends atan angle relatiVe to the first inlet coolant channel 134 and the second outlet coolant channel 138extends at an angle relatiVe to the second inlet coolant channel 137 as sirnilarly described hereinregarding replaceable cutting insert 24 and illustrated in Figure 4. For example, the f1rst outletcoolant channel 136 may extend at the same or similar angle M relatiVe to the first inlet coolantchannel 134 and the second outlet coolant channel 138 may extend at the same or similar angle NrelatiVe to the second inlet coolant channel 137. It Will be appreciated that for cutting insert 124the coolant channel 18 formed in tool body 12 Would need to be reconfigured to branch apart toaccommodate the first inlet coolant channel 134 and the second inlet coolant channel 137.
    [37] [0037] The tool body 12 portion of the rotary cutting tool 10 is made of, for example,steel or any other suitable materials haVing similar characteristics and properties. The replaceablecutting insert 24 is made of a hard cutting material, e.g. a tungsten carbide cutting alloy, oxideceramic or any other suitable materials haVing similar characteristics and properties.
    [38] [0038] A method of making a replaceable cutting insert such as, for example, thereplaceable cutting insert 24, is also provided. In one aspect, the method includes forming a hardcutting material mixture. As described, the replaceable cutting insert can be made of a hardcutting material, e.g. a tungsten carbide cutting alloy, oxide ceramic or any other suitablematerials haVing similar characteristics and properties. In addition to the hard cutting material, atherrnoplastics binder, for example, is added to make the mixture. In one aspect, thetherrnoplastic binder is mixed aboVe its melting temperature With, for example, a carbide poWderso that the powder is Well dispersed and the mixture floWs Well at this temperature.
    [39] [0039] In another aspect, the method includes injecting the hard cutting material mixtureinto a die for forrning a replaceable cutting insert body (e.g. insert body 26) haVing an inletcoolant channel (e.g. inlet coolant channel 34) in fluid communication With an outlet coolant channel (e. g. first outlet coolant channel 36), Wherein the inlet coolant channel includes a _ 10 _longitudinal axis (e. g. axis X-X) that is not axially aligned With a longitudinal axis of the outlet coolant channel (e.g. axis Y-Y). The cutting insert body can also be formed to have an additionalor second outlet coolant channel (e.g. second outlet coolant channel 38) Wherein the longitudinalaxis of the inlet coolant channel is not axially aligned With a longitudinal axis of the additional orsecond outlet coolant channel (eg. axis Z-Z).
    [40] [0040] In order to make the replaceable cutting insert having the described structure, orVariations thereof, the method also can include forrning, for example, replaceable cutting inserts24a and/or 24b (schematically represented in Figures 7A and 7B, respectively) by configuring thedie to include a first linear tooling element 46a, 46b for forming the first outlet coolant channel, asecond linear tooling element 48a, 48b for forming the second outlet coolant channel and a thirdlinear tooling element 50a, 50b for forming the inlet coolant channel. The first linear toolingelement 46a, 46b is configured to be interconnected With the third linear tooling element 50a, 50b,respectively and the second linear tooling element 48a, 48b is also configured to beinterconnected With the third linear tooling element 50a, 50b, respectively. In one aspect, thelinear tooling elements may be, for example, round pins or like elements shaped and configured toprovide the desired shape of the coolant channels to be formed. In another aspect, the lineartooling elements, eg. pins, may be configured in such a Way that they interlock When they contactone another and Will separate during removal from the replaceable cutting insert body. Thisavoids the possibility of flexing the pins during injection, Which may cause the channel formed tobe discontinuous, or to have other defects such as cracks.
    [41] [0041] In another aspect, the method includes removing the replaceable cutting insertbody and the corresponding linear tooling elements from the die. The removal of the replaceablecutting insert body from the die may be performed in more than one Way.
    [42] [0042] First, referring to Figure 7A, one aspect of the invention includes removing thereplaceable cutting insert body from the die can include WithdraWing the first linear toolingelement 46a and the second linear tooling element 48a after removing the replaceable cuttinginsert body from the die. In one aspect, the first and second linear tool elements 46a, 48a are notlinear With the die opening action direction (as represented, for example, by arrow D) andtherefore cannot be directly removed by the die opening Without the assistance of mechanical means, eg. mechanical cams. Thus, the linear tool elements 46a, 48a may be removed after the _ 11 _part is removed from the die. In order to achieve this, the linear tool elements 46a, 48a are not collinear with each other within the tool cavity, but would mo st likely change angle at the pointthat they exit the cavity and enter the die, as illustrated by vertical portions 46aa and 48 aa. Theangle may change such that both tools are linear with the axis of die opening or part ejection(usually the same axis). This would facilitate removal of the molded insert with the linear toolelements 46a, 48a intact by simple ejection. The vertical portions 46aa and 48aa of the linear toolelements 46a, 48a that protrude from the body are then used to pull the linear tool elements 48a,50a out of the body in the respective directions as shown by arrows F and G. The linear toolelements 46a, 48a are then secured into the die again for the next injection.
    [43] [0043] Second, referring to Figure 7B, another aspect of the invention provides for theremoving of the replaceable cutting insert body from the die to include withdrawing the first lineartooling element 46b and the second linear tooling element 48b before removing the replaceablecutting insert body from the die. The first and second linear tooling elements 46b, 48b will eXtendthrough the cavity portion of the tool, and are then connected to a hydraulic or mechanical actionthat is used to remove the linear tooling elements 46b, 48b (in the respective directions as shownby arrows F and G) that could not directly be removed by the opening of the die because they arenot collinear to the axis of mold opening /ejection (as represented, for example, by arrow D). Thehydraulic or mechanical action is used to remove these linear tooling elements 46b, 48b prior toopening of the die and prior to ejection of the body.
    [44] [0044] The third linear tooling elements 50a, 50b can be directly removed (in the directionindicated by arrow H) from the cavity by the die opening action, since these elements, e.g. pinsare collinear or in the same general direction with the axis of the die opening, e.g. as represented,for example, by arrow D .
    [45] [0045] Whereas particular aspects of this invention have been described above forpurposes of illustration, it will be evident to those skilled in the art that numerous variations of thedetails of the present invention may be made without departing from the invention as defined in the appended claims.
    权利要求:
    Claims (20)
    [1] 1. A replaceable cutting insert, comprising: a cutting insert body having a forward cutting face and an opposingrearward base; an inlet coolant channel formed in the cutting insert body and def1ning aninlet opening at the rearward base of the cutting insert body, the inlet coolant channel having alongitudinal axis; a first outlet coolant channel formed in the cutting insert body and in fluidcommunication with the inlet coolant channel, the first outlet coolant channel defming a firstoutlet opening at the forward cutting face of the cutting insert body, wherein the first outletcoolant channel includes a first longitudinal axis that is not axially aligned with the longitudinalaxis of the inlet coolant channel; and a second outlet coolant channel formed in the cutting insert body and influid communication with the inlet coolant channel, the second outlet coolant channel defining asecond outlet opening at the forward cutting face of the cutting insert body, wherein the secondoutlet coolant channel includes a second longitudinal axis that is not axially aligned with thelongitudinal axis of the inlet coolant channel.
    [2] 2. The replaceable cutting insert of claim 1, wherein the first outlet coolantchannel is linear and the second outlet coolant channel is linear.
    [3] 3. The replaceable cutting insert of claim 2, wherein the inlet coolant channelis linear.
    [4] 4. The replaceable cutting insert of claim 3, wherein the first outlet coolantchannel extends at a first angle relatiVe to the inlet coolant channel, the first angle being in therange of about 90 degrees to about 160 degrees.
    [5] 5. The replaceable cutting insert of claim 4, wherein the second outlet coolantchannel extends at a second angle relatiVe to the inlet coolant channel, the second angle being in the range of about 90 degrees to about 160 degrees. _ 13 _
    [6] 6. The replaceable cutting insert of claim 5, wherein the f1rst Outlet coolant channel extends at a third angle relatiVe to the second outlet coolant channel, the third angle beingin the range of about 20 degrees to about 180 degrees.
    [7] 7. The replaceable cutting insert of claim l, wherein the longitudinal axis ofthe inlet coolant channel extends in the same direction as a central rotational axis of thereplaceable cutting insert.
    [8] 8. The replaceable cutting insert of claim l, wherein the longitudinal axis ofthe inlet coolant channel is co incident with a central rotational axis of the replaceable cuttinginsert.
    [9] 9. A replaceable cutting insert, comprising: a cutting insert body haVing a forward cutting face and an opposingrearward base; a first inlet coolant channel forrned in the cutting insert body and def1ning afirst inlet opening at the rearward base of the cutting insert body, the first inlet coolant channelhaVing a first longitudinal axis; a second inlet coolant channel formed in the cutting insert body anddefming a second inlet opening at the rearward base of the cutting insert body, the second inletcoolant channel haVing a second longitudinal axis; a f1rst outlet coolant channel formed in the cutting insert body and in fluidcommunication with the first inlet coolant channel, the first outlet coolant channel def1ning a firstoutlet opening at the forward cutting face of the cutting insert body, wherein the f1rst outletcoolant channel includes a third longitudinal axis that is not axially aligned with the firstlongitudinal axis of the first inlet coolant channel; and a second outlet coolant channel forrned in the cutting insert body and influid communication with the second inlet coolant channel, the second outlet coolant channeldefming a second outlet opening at the forward cutting face of the cutting insert body, whereinthe second outlet coolant channel includes a fourth longitudinal axis that is not axially aligned withthe second longitudinal axis of the second inlet coolant channel.
    [10] 10. l0. The replaceable cutting insert of claim 9, wherein the first outlet coolant channel is linear and the second outlet coolant channel is linear. _ 14 _
    [11] 11. The replaceable cutting insert of claim 10, wherein the first inlet coolant channel is linear and the second inlet coolant channel is linear.
    [12] 12. The replaceable cutting insert of claim 11, wherein the first outlet coolantchannel extends at a first angle relatiVe to the first inlet coolant channel, the first angle being in therange of about 90 degrees to about 160 degrees.
    [13] 13. The replaceable cutting insert of claim 12, wherein the second outletcoolant channel extends at a second angle relatiVe to the second inlet coolant channel, the secondangle being in the range of about 90 degrees to about 160 degrees.
    [14] 14. The replaceable cutting insert of claim 9, wherein the first longitudinal axisof the first inlet coolant channel and the second longitudinal axis of the second inlet coolantchannel both extend in the same direction as a central rotational axis of the replaceable cuttinginsert.
    [15] 15. The replaceable cutting insert of claim 9, wherein the first longitudinal axisof the first inlet coolant channel and the second longitudinal axis of the second inlet coolantchannel are parallel.
    [16] 16. A rotary cutting tool, comprising: a tool body haVing an axial forward end and an axial rearward end, the toolbody defming a coolant channel that extends therethrough from the axial rearward end to the axialforward end; and a replaceable cutting insert structured and arranged for releasableattachment to the axial forward end of the tool body, the replaceable cutting insert including: a cutting insert body haVing a forward cutting face and an opposingrearward base positionable adjacent the axial forward end of the tool body; an inlet coolant channel formed in the cutting insert body anddefming an inlet opening at the rearward base of the cutting insert body, the inlet coolant channelhaVing a longitudinal axis, wherein the inlet coolant channel is positionable to be in fluidcommunication with the coolant channel of the tool body; a first outlet coolant channel formed in the cutting insert body andin fluid communication with the inlet coolant channel, the first outlet coolant channel defining a first outlet opening at the forward cutting face of the cutting insert body, wherein the first outlet _ 15 _coolant channel includes a first longitudinal axis that is not axially aligned With the longitudinal axis of the inlet coolant channel; anda second outlet coolant channel formed in the cutting insert body and in fluid communication With the inlet coolant channel, the second outlet coolant channel defining asecond outlet opening at the forward cutting face of the cutting insert body, Wherein the secondoutlet coolant channel includes a second longitudinal axis that is not axially aligned With thelongitudinal axis of the inlet coolant channel.
    [17] 17. A method of making a replaceable cutting insert, comprising: forming a hard cutting material mixture; injecting the hard cutting material mixture into a die for forming areplaceable cutting insert body haVing an inlet coolant channel in fluid communication With a firstoutlet coolant channel and a second outlet coolant channel, Wherein the first outlet coolantchannel includes a first longitudinal axis that is not axially aligned With a longitudinal axis of theinlet coolant channel and the second outlet coolant channel includes a second longitudinal axisthat is not axially aligned With the longitudinal axis of the inlet coolant channel; and remoVing the replaceable cutting insert body from the die.
    [18] 18. The method of claim 17, including configuring the die to include a firstlinear tooling element for forming the first outlet coolant channel, a second linear tooling elementfor forrning the second outlet coolant channel and a third linear tooling element for forrning theinlet coolant channel, Wherein the first linear tooling element is interconnected With the third lineartooling element and the second linear tooling element is interconnected With the third lineartooling element.
    [19] 19. The method of claim 18, including WithdraWing the first and second lineartooling elements before remoVing the replaceable cutting insert body from the die.
    [20] 20. The method of claim 18, including WithdraWing the first and second linear tooling elements after remoVing the replaceable cutting insert body from the die.
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    US20140255116A1|2014-09-11|
    KR20140110781A|2014-09-17|
    JP2014172167A|2014-09-22|
    CN104028810A|2014-09-10|
    DE102014102952A1|2014-09-11|
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    法律状态:
    2017-01-17| NAV| Patent application has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    US13/792,032|US20140255116A1|2013-03-09|2013-03-09|Rotary cutting tool, replaceable cutting insert and method of making replaceable cutting insert|
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