• 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:
    insert and tool for tilting milling. a milling insert with unilateral inclination (14) for inclination operations has top and bottom surfaces (20, 22) and a peripheral surface (24) that extends between them. the peripheral surface (24) meets the top and bottom surfaces (20, 22) at the respective top and bottom edges (28, 30). the upper edge (28) includes two opposite side cutting edges (32), two opposite sloping cutting edges (30), two diagonally opposite raised corner cutting edges (44) and two diagonally associated low corner cutting edges opposite (54). the low corner cutting edges (54) are closer to the bottom surface (22) than the raised corner cutting edges (44). the bottom edge (30) has two diagonally opposed bottom corner edges (64). the low corner cutting edges (54) and the bottom corner edges (64) are convexly curved and a depression (66) is recessed in the peripheral surface (24) between each low corner cutting edge (54) and its associated bottom corner edge (64), the depression (66) configured to provide relief from a surface of the convex workpiece cut by the low corner cutting edge (54) during tilting operations.
    公开号:BR112016011397B1
    申请号:R112016011397-7
    申请日:2014-10-22
    公开日:2020-12-15
    发明作者:Assaf Ballas
    申请人:Iscar Ltd.；
    IPC主号:
    专利说明:

    Field of the Invention
    [001] The subject of the present invention refers to metal cutting tools for milling, specifically configured for tilting, drilling or helical interpolation operations. Background of the Invention
    [002] Tools for field milling are known and described, for example, in US patent 7,189,030. Tools for slope milling are also known and described, for example, in US patent 8,449,230. Summary of the Invention
    [003] According to the present invention, a insert for milling with unilateral indexable inclination configured for inclination operations and for mounting in a cavity of a tool for inclined milling is provided.
    [004] The insert includes top and bottom surfaces and a peripheral surface that extends between them and meets the top and bottom surfaces in respective top and bottom edges. The top edge includes two lateral cutting edges, two sloping opposite cutting edges, two diagonally opposite raised corner cutting edges and two diagonally opposed low corner cutting edges.
    [005] Each corner cutting edge is located between sloping and side cutting edges, and the low corner cutting edges are closer to the bottom surface than the raised corner cutting edges. The bottom edge includes two diagonally opposed bottom corner edges, each being associated with, and adjacent to a respective low corner cutting edge.
    [006] The low corner cutting edges and the low corner edges are curved in a convex manner; and a depression is recessed in the peripheral surface, between each low corner cutting edge and associated bottom corner edge, the depression configured to provide relief from a surface of the convex workpiece cut by the low corner cutting edge during cutting operations. inclination.
    [007] According to the present invention, there is additionally provided a tool for tilting milling having a geometry axis of rotation Z and comprising a tool body having a cavity and the insert for tilting milling stuck in the cavity.
    [008] Any of the following characteristics, either alone or in combination, may be applicable to any of the above aspects of the present invention: in a plan view of the bottom surface, the depression may have a concave curved portion of a concave shape; the depression is concave, at least in a cross section along a median plane P that is located between the upper and bottom surfaces and intersects the peripheral surface; the depression is spaced from both the low corner cutting edge and the associated bottom corner edge; the insert may include a through hole for tightening the insert that opens to the top and bottom surfaces; the top and bottom surfaces define an upward direction, and where each bottom corner edge can be located under its associated low corner cutting edge; a projection of the low corner cutting edge (54) in a direction parallel to the geometric axis of the hole (B), can overlap at least a portion of the bottom corner edge (64); low corner cutting edges and sloping cutting edges are only configured for slope operations; the insert can include exactly four corner cutting edges; the insert can include two cutting edges, each connected to the sloping cutting edge and a raised corner cutting edge; the bottom corner edges are not configured for machining; in a flat view of the top surface, the bottom edge cannot be seen; in a flat view of the bottom surface, both the top edge and the bottom edge can be seen; the peripheral surface diverges in a direction from the bottom surface to the top surface; the bottom edge is free of cutting edges; the peripheral surface includes two first lateral abutment surfaces and two second opposite abutment surfaces configured to abut a cavity in a milling tool body; the peripheral surface and the bottom surface form a non-acute angle α of the bottom edge adjacent to, and along the entire bottom edge; the bottom surface is smaller than the top surface; the sloping milling insert is secured in the cavity by a screw, and the cavity includes a surface of the base of the cavity and first and second supporting walls extending from them. The first support wall includes a first abutment surface and the second support wall includes two second coplanar abutment surfaces. A first abutment side surface abuts the first abutment surface, a second abutment side surface abuts the two second abutment surfaces and the bottom abutment surface on the base surface of the cavity. Brief Description of Drawings
    [009] For a better understanding of the present invention and to show how it can be carried out in practice, reference will now be made to the attached drawings, in which: Figure 1 is a side view of a tool for milling together; Figure 2 is a partial isometric exploded view of the milling tool of Figure 1; Figure 3 is an isomeric view of an insert for tilting milling; Figure 4 is a side view of the tilting milling insert in Figure 3; Figure 5 is a cross section taken along the VV line in Figure 4, showing a concave portion of a depression; Figure 6 is a bottom plan view of a bottom surface of the tilting milling insert of Figure 3; Figure 7 is a top plan view of an upper surface of the tilting milling insert of Figure 3; Figure 8 is an isomeric view of the insert for tilting milling showing a trace of a workpiece cutting surface during tilting operations; Figure 9 is a bottom plan view of the insert for milling with an angle and the outline of Figure 8; Figure 10 is a detailed view of the slope milling insert and the outline of Figure 9; Figure 11 is a side view of the sloping milling insert and the outline of Figure 8; Figure 12 is a cross section of the insert for milling with an inclination and the line taken along line XII-XII of Figure 11; and Figure 13 shows a graph comparing angles with inclination in inserts with and without a depression.
    [0010] Where deemed appropriate, reference numbers may be repeated between figures to indicate corresponding or similar elements. Detailed Description of the Invention
    [0011] In the following description, various aspects of the present invention will be described. For purposes of explanation, specific configurations and details are presented in sufficient detail to provide a complete understanding of the subject of the present invention. However, it will also be apparent to one skilled in the art that the subject in question of the present invention can be practiced without the specific configurations and details presented here.
    [0012] Reference is made to Figures 1 and 2. A tool for milling 10 capable of tilting operations has a geometric axis of rotation Z, includes a tool body 12 and can include three inserts for milling with indexable inclination 14 stuck in cavities 16 at a front end of the tool body 18. The inserts 14 project from the front end of the tool body 18 in the direction of the geometric axis of rotation Z. In order to elaborate on the inclination, the subject in question of the present invention is refers to metal machining, specifically, where the cutting tool rotates about the Z axis of rotation and also advances in the direction of the Z axis of rotation (out of the front end of the tool body 18) and advances in a plane XY of the face that is perpendicular to the geometric axis of rotation Z. Slope is also known as slope or deceleration milling.
    [0013] Attention is drawn to Figures 3 to 7. Insert 14 is typically made of extremely hard and wear-resistant material such as carbide, either by pressing or by injection molding and sintering metal powders. a binder. The carbide can be, for example, tungsten metal. Insert 14 can be coated or not. In the present example, insert 14 is made by pressing.
    [0014] According to the subject matter of the present invention, each insert 14 is unilateral and has an upper surface 20, a bottom surface 22 and a peripheral surface 24 that extends between them. The bottom surface 22 can be flat. The bottom surface 22 is smaller than the top surface 20.
    [0015] According to the subject matter of the present invention, each insert 14 is unilateral and has an upper surface 20, a bottom surface 22 and a peripheral surface 24 that extends between them. The bottom surface 22 can be flat. The bottom surface 22 is smaller than the top surface 20.
    [0016] Insert 14 has a medium plane P that can be located in the middle between the top and bottom surfaces 20, 22 and intersects the entire peripheral surface 24. The middle plane P can be parallel to the bottom surface 22. The insert 14 can have a pinch hole 26 that passes through the top and bottom surfaces 20, 22 and the middle plane. The clamping hole 26 has a central geometric axis B that can be perpendicular to the median plane P. Insert 14 can have 180 degree rotational symmetry around the central geometric axis B. The peripheral surface 24 meets the upper and bottom surfaces 20 , 22 at the top and bottom edges (28, 30). As shown in Figure 7, in a plan view of the upper surface 20, the bottom edge 30 cannot be seen. In a flat view of the bottom surface 22, both the top or bottom edges (28, 30) are seen.
    [0017] The bottom edge 30 has no cutting edges. In other words, the bottom edge 30 is not capable of machining. In addition, anywhere along the bottom edge 30, the peripheral surface 24 and the bottom surface 22 (adjacent to the bottom edge 30) form a non-acute angle α of the bottom edge (Figure 11).
    [0018] The top edge 28 can include two opposite side cutting edges 32. The side cutting edges 32 can be longer than the rest of the cutting edges, and can extend along a longitudinal direction of the insert 14. The top surface 20 includes two side rake surfaces 34 and the peripheral surface 24 includes two side relief surfaces 36. Each side cutting edge 32 is associated with a side rake surface 34 which finds a respective side relief surface 36 at the edge side cut 32.
    [0019] According to the present example, the upper edge 28 includes two final cutting edges 37. Each final cutting edge 37 can include a sub cutting edge 38 and an inclined cutting edge 50 connected thereto via a transition corner cutting edge 52. In the present example, cutting sub-edge 38 is configured to feed milling operations. The cutting edges 38 can be smaller than the side cutting edges 32. The top surface 20 can include two end rake surfaces 40 and the peripheral surface 24 can include two end relief surfaces 42. Each cutting edge 38 it is associated with a final rake surface 40 which finds a respective final relief surface 42 at the cutting edge 38.
    [0020] The top edge 28 additionally includes two diagonally opposed raised corner cutting edges 44. According to the present example, each raised corner cutting edge 44 is located between, and connects, the final cutting edges and sides 32, 37. The raised corner cutting edges 44 are curved convexly. The raised corner cutting edges 44 are located farther from the middle plane P than any other portion of the insert 14 located on the same side of the middle plane P. At least one apex of each raised corner cutting edge 44 extends outwardly of the peripheral surface 24 and the upper surface 20 further away than any other portion of the insert 14.
    [0021] The upper surface 20 includes two raised corner rake surfaces 46 and the peripheral surface 24 includes two raised corner relief surfaces 48. Each raised corner cutting edge 44 is associated with an elevated corner rake surface 46 which finds a respective raised corner relief surface 48 on the raised corner cutting edge 44. In milling operations, the raised corner cutting edge 44 cuts a corner, or a ridge apex, in a workpiece.
    [0022] The cutting edges with slope 50 are configured for slope operations. Each sloping cutting edge 50 is connected, on one side, to a respective low corner cutting edge 54 as will be further explained below. According to the present example, each sloping cutting edge 50 is connected, on another side, to the cutting edges 38 through the transition corner cutting edge 52. At least a portion of the transition corner cutting edge 52 can be configured for finishing or scanning operations. Each sloping cutting edge 50 may be longer than the cutting sub-edge 38, and may be shorter than the lateral cutting edge 32.
    [0023] The top edge 28 additionally includes two diagonally opposed low-corner cutting edges 54. Each low-corner cutting edge 54 is connected to the lateral cutting edges 32 on one side, and can be connected to the sloping cutting edges 50 on another side of it. The low corner cutting edges 54 are located closer to the middle plane P than the raised corner cutting edges 44. The raised corner cutting edges 54 are configured for slope operations.
    [0024] In tilting operations, an upper section of the low corner cutting edge 54 closest to the side cutting edge 32 includes an outer or maximum cutting point 56 that still "works", or cuts, the slope of the part of work. As will be further explained below, the maximum cut point 56 is the highest (and furthest from the 50-degree cutting edge), or last, point on a low cut cutting edge 54 that still cuts the workpiece during tilt operations. The location of the maximum cutoff point 56 is largely determined, or influenced, by the amount of relief behind the low corner cutting edge 54, which in turn allows (and determines) angles with a higher slope, and consequently, operations more efficient and faster tilt modes. In other words, the greater the relief, the farther the maximum cutoff point 56 is from the sloping cutting edge 50, along the lower corner cutting edge 54.
    [0025] It is observed that the exact location of the maximum cutting point 56 on the low corner cutting edge 54, is also influenced by other machining variables, and can change during, and as a result of machining. Therefore, the indication of the location of the maximum cutoff point 56 (as shown in Figures 1, 7 and 10) should not be considered as the only possible location of this point, but rather a general indication, conforming the definition above the location.
    [0026] Each low corner cutting edge 54 is connected to a 50 degree sloping cutting edge. Each low corner cutting edge 54 is curved in a convex manner. The upper surface 20 includes two low corner rake surfaces 58 and the peripheral surface 24 includes two low corner relief surfaces 60. Each low corner cutting edge 54 is associated with a low corner rake surface 58 which meets a respective low corner relief surface 60 on a low corner cutting edge 54.
    [0027] The peripheral surface 24 can include two pairs of first and second lateral abutment surfaces 62, 63 configured to abut with counterpart surfaces in cavity 16. In a bottom view of insert 14 (Figure 6) each lateral abutment surface 62, 63 is located between adjacent low-cut cutting edges 48, 60.
    [0028] Bottom edge 30 includes two bottom corner edges 64. Each bottom corner edge 64 is associated with a low corner cut edge 54 of the top edge 28. In other words, each bottom corner edge 64 is located below a respective low corner cutting edge 54. In other words, a projection of the low corner cutting edge 54 in a direction parallel to the hole B axis overlaps at least a portion of the corner edge bottom 64. Each bottom edge 64 is advantageously curved convexly. This strengthens the corner and insert 14, and provides an improved support to combat machining forces. The bottom corner edges 64 are not configured for metal machining.
    [0029] Figures 3 to 5 are noted. Insert 14 includes two depressions 66, or craters, recessed on the peripheral surface 24. The crater-like shape allows for better relief during tilting operations. In the current description, the term depression 66 means a surface that is sunk inward, or is located below, or depressed below, surrounding surfaces. Thus, each depression 66 is formed into an imaginary surface connecting a low corner cutting edge 54 corresponding to its associated bottom corner edge 64. Each depression 66 includes at least one concave curved portion 68. The portion concave 68 is located between the upper and bottom 70, 72 of depression 66 (Figure 4). As shown in Figure 5, the depression 66 is concave in a cross-sectional view taken along the median plane P. A depression 66 is located between each low corner cutting edge 54 and its associated bottom corner edge 64. In other words , each depression 66 is located between the associated low corner cutting edge 54 and the bottom corner edge 64. Also, each depression 66 is spaced from the low corner cutting edge 54 and also its associated bottom corner edge 64. The fact if the depression 66 does not reach the bottom edge 30 it allows (without giving up the relief space) a larger bottom surface 22 to be formed, or projected contributing to the robustness of the insert 14. Each low corner relief surface 60 extends between the depression 66 and a respective low corner cutting edge 54. The depression 66 allows for greater release, or relief, “behind” the sloping corner cutting edge, and the low corner relief surface 60, which allows operations in inclination at greater angles with inclination, in relation, for example, to a reference insert, similar that does not include such a depression 66.
    [0030] Attention is drawn to Figures 8 to 12, where a “trace” 74 of a surface of the cutting workpiece is shown, after being cut by the low corner cutting edge 54. Trace 74 shows only one partial representation of the workpiece surface (and its curvature) cut by the insert 14. Specifically, it shows a representation of the surface cut only by the low corner cutting edge 54. Due to the convex shape of the low corner cutting edge 54, transversal (Figure 12) with the P plane, the line 74 is concavely curved towards the insert 14. This is due to the inclination and rotation of the corner cutting edges around the Z axis of rotation. The depression 66 allows space for the stroke 74 to flow freely within it or in it, and therefore, the insert 14 is suitably relieved. In other words, without the existence of depression 66, there would not be enough relief, which could lead to unwanted contact with the stroke 74 (due to its external convex curvature, which enters the “space” in the concave portion 68 of depression 66).
    [0031] In Figure 2, it is further shown that in a cross section taken along the median plane P, an edge of the cross section of trace 74 is adjacent to the innermost point in concave depression 66. An angle θ of inclination is typically measured between the XY side plane and a radial feedrate V of the tool in a workpiece (Figure 1). The convex bottom edge 30, together with the convex low corner cutting edge 54, provides a more robust structure that is resistant to breakage, thereby greatly improving the performance of slope machining. In addition, the concave portion 68, as shown in Figure 10, provides sufficient relief to perform machining with slope at greater angles, while preserving the robustness of the insert 14 (Figure 12).
    [0032] Figure 13 shows a comparison of performance under similar conditions of tilting operations, between a modality of insert 14 disclosed in the present invention, and a reference insert (having almost identical geometry) that does not include the depression 66 behind the edge low corner cutter 54.
    [0033] In particular, Figure 13 shows inclined angles achieved with each insert, with various tool diameters. As shown in this figure, the depression 66 significantly increases machining angles with slope which translates into improved performance of the milling tool 10. In addition, according to the non-limiting values of the graph above, insert 14, and consequently the milling tool 10, are capable of machining with inclination at angles with an inclination ranging from 150% to 200% compared to angles with inclination of the inserts without a depression 66. According to the respective tool diameters, angles with inclination of the milling tool 10 can vary from 2 to 4.5 degrees.
    [0034] According to the present example, each cavity 16 includes a surface of the cavity base 76, and first and second support walls 78, 80 that extend from the surface of the cavity base 76. The second support wall 80 can extend along the Z axis of rotation. The first support wall 78 can extend in a direction perpendicular to the Z axis of rotation. The base surface includes a cavity tightening hole. In the present example, the first support wall 78 includes a first abutment surface 82 and the second support wall 80 may include two second coplanar abutment surfaces 84.
    [0035] In a secure position, insert 14 can be tightened in cavity 16 using, for example, a screw. The screw is located in the hole for tightening the insert 26 and screwed into the hole for tightening the cavity. The insert and screw holes can be eccentric. A first lateral abutment surface 62 is in contact with the first abutment surface 82. A second lateral abutment surface 62 is in contact with the two second abutment surfaces 84. The bottom surface 22 is in contact with the base surface cavity 76.
    [0036] While the present invention has been described with reference to one or more specific modalities, the description is intended to be illustrative as a whole and is not to be construed as limiting the invention to the modalities shown. It should be understood that various modifications can occur with those skilled in the art which, while not specifically shown here, are nevertheless within the scope of the invention.
    权利要求:
    Claims (15)
    [0001]
    1. Insert for tilting milling (14), indexable and one-sided, configured for tilting operations and for mounting in a cavity (16) of a tool for tilting milling (10), comprising top and bottom surfaces (20, 22 ) and a peripheral surface (24) extending between them and meeting the upper and lower surfaces (20, 22) at the respective upper and lower edges (28, 30), the upper edge (28) comprising an edge side cutting edge (32), a final cutting edge (37), a raised corner cutting edge (44) located between them, and a low corner cutting edge (54) connected to the final cutting edge (37) ); the low corner cutting edge (54) being closer to the bottom surface (22) than the raised corner cutting edge (44), the bottom edge (30) comprising a bottom corner edge (64) associated with, and adjacent to, the low corner cutting edge (54), characterized by the fact that: the low corner cutting edge (54) and the bottom corner edge (64) are convexly curved; and, a depression (66) is recessed in the peripheral surface (24) between the low corner cutting edge (54) and its associated low corner edge (64), the depression (66) being configured to provide relief from a surface of convex workpiece cut by the low corner cutting edge (54) during tilting operations, the depression (66) being spaced from both the low corner cutting edge (54) and the associated bottom corner edge ( 64).
    [0002]
    2. Slope milling insert (14) according to claim 1, characterized in that, in a flat view of the bottom surface (22), the depression (66) has a concave curved portion of a concave shape (68 ).
    [0003]
    Slope milling insert (14) according to either of claims 1 or 2, characterized in that the depression (66) is concave, at least in a cross section taken along an average plane (P) , which is located between the top and bottom surfaces (20, 22) and intersects the peripheral surface (24).
    [0004]
    Slope milling insert (14) according to any one of claims 1 to 3, characterized in that: each final cutting edge (37) comprises a sloping cutting edge (50) connected to a sub-edge cutting (38) through a transition corner cutting edge (52); and, the low corner cutting edge (54) and the tilt cutting edge (50) are configured for tilt operations only.
    [0005]
    Slope milling insert (14) according to any one of claims 1 to 4, characterized in that the insert (14) comprises exactly four corner cutting edges (44, 54).
    [0006]
    6. Slope milling insert (14) according to any one of claims 1, 2 or 5, characterized in that: each final cutting edge (37) comprises a sloping cutting edge (50) connected to a cutting edge (38) through a transition corner cutting edge (52); and, the cutting edge (38) is configured at least partially for sweeping operations.
    [0007]
    Slope milling insert (14) according to any one of claims 1 to 6, characterized in that the insert (14) comprises a through hole for tightening the insert (26) that opens to the upper and lower surfaces. bottom (20, 22), the hole for clamping having a central geometric axis (B).
    [0008]
    8. Slope milling insert (14) according to claim 7, characterized in that a projection of the low corner cutting edge (54) in a direction parallel to the geometric axis of the inner diameter (B) overlaps at least a portion of the bottom corner edge (64).
    [0009]
    9. Slope milling insert (14) according to claim 7, characterized by the fact that the insert (14) has 180 degree rotational symmetry around the central geometric axis (B).
    [0010]
    Slope milling insert (14) according to any one of claims 1 to 9, characterized in that the peripheral surface (24) diverges in a direction from the bottom surface (22) to the upper surface ( 20).
    [0011]
    Slope milling insert (14) according to any one of claims 1 to 10, characterized in that the bottom edge (30) is free of cutting edges.
    [0012]
    Slope milling insert (14) according to any one of claims 1 to 11, characterized in that the peripheral surface (24) and the bottom surface (22) form an angle α of the non-acute bottom edge along the entire bottom edge (30).
    [0013]
    Slope milling insert (14) according to any one of claims 1 to 12, characterized in that the bottom surface (22) is smaller than the top surface (20).
    [0014]
    14. Slope milling tool (10), characterized by the fact that it has a geometric axis of rotation (Z) and comprises a milling tool body (12) having a cavity (16), and the slope milling insert (14), as defined in any one of claims 1 to 13, stuck in the cavity (16).
    [0015]
    Slope milling tool (10) according to claim 14, characterized in that: the slope milling insert (14) is secured in the cavity (16) by a screw; the cavity includes a surface of the base of the cavity (76) and first and second support walls (78, 80) extending therefrom; the first support wall (78) comprises a first abutment surface (82) and the second support wall (80) comprises two second coplanar abutment surfaces (84); and, a first abutment side surface (62) of the cutting insert abuts the first abutment surface (82), a second abutment side surface (62) of the abutment insert abuts on the two second abutment surfaces (84) and the bottom surface (22) abuts the surface of the base of the cavity (76).
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    同族专利:
    公开号 | 公开日
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    RU2676811C1|2019-01-11|
    EP3071357A1|2016-09-28|
    CN105722626B|2018-09-21|
    RU2016124299A|2017-12-26|
    CA2930993C|2021-03-02|
    KR20160086901A|2016-07-20|
    WO2015075706A1|2015-05-28|
    CN105722626A|2016-06-29|
    JP6507163B2|2019-04-24|
    EP3071357B1|2021-12-22|
    JP2016537212A|2016-12-01|
    US9358622B2|2016-06-07|
    US20150139743A1|2015-05-21|
    KR102240010B1|2021-04-15|
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    US10427225B2|2017-11-15|2019-10-01|Kennametal Inc.|Tangentially mounted indexable cutting insert with segmented cutting edge and triangular-shaped margin|
    RU204571U1|2021-02-01|2021-05-31|Федеральное государственное бюджетное образовательное учреждение высшего образования "Московский государственный технологический университет "СТАНКИН" |Plunger cutter with tangential inserts|
    法律状态:
    2020-02-11| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-11-03| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2020-12-15| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 22/10/2014, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US14/086419|2013-11-21|
    US14/086,419|US9358622B2|2013-11-21|2013-11-21|Single sided indexable ramping milling insert and ramping milling tool|
    PCT/IL2014/050915|WO2015075706A1|2013-11-21|2014-10-22|Single-sided indexable ramping milling insert and ramping millng tool|
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