• 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:
    Rotating drilling spindle (1) having a nozzle (4) arranged coaxially and slidably on the piercing spindle body (3) to be movable between a rest position and at least one working position. In the rest position, the drill (2) is entirely contained in a cavity (8) delimited between the piercing spindle body (3) and the end piece (4). In working position, the drill (2) protrudes out of the cavity (8) through an orifice (7) formed in the nozzle (4). The tip (4) is permanently recalled in the rest position. Injection means (10) for injecting a fluid into the cavity (8) while suction means (13) for extracting a fluid and chips out of the cavity (8).
    公开号:FR3036639A1
    申请号:FR1554921
    申请日:2015-05-29
    公开日:2016-12-02
    发明作者:Bruno Botton；Laurent Combaz
    申请人:LE CRENEAU IND；
    IPC主号:
    专利说明:

    [0001] The present invention relates to the field of drilling, and more particularly relates to the field of acoustic drilling in the field of aeronautics, particularly for drilling titanium plates. Noise attenuation is a major concern in the field of aeronautics. In order to improve the acoustic performance of aircraft, the engine nacelles are equipped with acoustic plates to attenuate the noise generated by the reactors. To do this, said acoustic plates are provided with a multitude of small diameter holes distributed so as to provide an acoustic absorption effect of the noise generated by the reactors. These holes are usually made by drilling, to ensure the accuracy necessary for effective sound absorption. Known tooling for acoustic drilling is described, for example, in document FR 2 643 004 A1, which proposes a tool-holder tooling provided with a plurality of rotary drill-bit drills, said drilling pins being oriented in directions. drilling parallel to a mean drilling direction. This tool can be used during an industrial drilling cycle of a plate by an automated movement such as that described in document FR 2 927 271 A1 for example. It is sometimes proposed nacelles of aircraft made using titanium plates. When drilling a titanium plate using a drill, there is a very high temperature rise of the drill and the periphery of the drilling zone. This heating, if not moderate, can result in a local degradation of the mechanical characteristics of the plate. Moreover, this heating damages the characteristics of the drills, which thus have a very limited life and therefore need to be changed regularly. Then, removal of material by drilling generates relatively long and scalloped chips that tend to cling to the drill and may scratch the surface of the plate to be drilled. However, the requirements for surface finish are very high in the aeronautical field, so scrapping is too often required. Moreover, the periphery of the hole tends to tighten the drill radially. Thus, the removal of the drill, in the case of fine titanium plates whose thickness is less than or equal to about 2 mm, may cause local deformation of the sheet at the periphery of the hole. This deformation is in the form of a small, substantially frustoconical dome and is often disqualifying with respect to surface condition requirements. The radial clamping of the drill can further induce a retention thereof causing a drill break. To solve these problems of piercing nacelles of titanium plate aircraft, it has already been made acoustic piercing by water jets.
    [0002] The disadvantage of such a process is that it is very long and not very clean because of the fluid projections that this requires and the splashing that entails. A problem proposed by the present invention is to provide a piercing device for piercing a titanium plate faster and cleaner, effectively limiting the risks of degradation of the mechanical characteristics and the surface condition of the plate. , while extending the life of the drill bit of a drilling spindle. To achieve these and other objects, the invention provides a rotatable drilling spindle for rotatably driving a drill around a drilling direction, having a piercing spindle body elongating in the drilling direction. ; according to the invention: - a tip, having a substantially tubular side wall and a bottom wall provided with an orifice, is disposed coaxially with the drilling direction and sliding relative to said piercing pin body in the drilling direction to be moveable between at least one resting position and at least one working position, - in the rest position, the bit is overlapping the piercing pin body to a first length, so that the drill is fully contained in a cavity delimited by the piercing spindle body, the substantially tubular side wall and the bottom wall of the spout, 25 - in the working position, the spigot is overlapping the piercing spindle body according to a second length , greater than the first length, so that the cutting end of the drill protrudes out of the cavity through the orifice of the bottom wall, - resilient return means recall in the nozzle remains in the rest position, injection means for injecting a fluid into the cavity through an injection orifice, suction means for extracting a fluid from the cavity by a extraction orifice.
    [0003] The tip makes it possible to come into contact with the plate to be pierced before the drill touches it, in order to effectively limit the phenomena of vibrations which could affect a good quality of drilling in terms of geometry. 3036639 3 drilling and surface finish including. In particular, it is possible to use the tip to press the plate to be drilled against a drilling medium before the drill touches it. The tip abuts on the plate substantially all around the hole 5 (preferably in the immediate vicinity of the hole) and, during removal, the drill is extracted from the pierced plate before the tip is detached from the plate . The risk of creating a local deformation by creating a frustoconical dome is thus reduced because the plate remains pressed against the drilling medium by the tip during removal of the drill out of the plate.
    [0004] The injection means allow a fluid (preferably air with oil droplets in suspension for micro-lubrication) to be injected to lubricate the cut made by the drill and simultaneously cool the drill bit and the cooling zone. the plate being pierced. A gas (refrigerated or not) and / or a liquid may also be injected by the injection means.
    [0005] The suction means make it possible to evacuate the fluid injected by the injection means (or a residual part thereof) to guarantee satisfactory cleanliness, and also make it possible to evacuate the chips. The cavity confines the lubrication, cooling and chip evacuation closer to the area to be drilled, greatly increasing their efficiency and the life of the drill bit. Furthermore, the spindle according to the invention can have very small dimensions allowing the construction of a drilling device comprising a plate on which is arranged a plurality of piercing pins, oriented in parallel drilling directions to a mean direction of drilling. drilling.
    [0006] Such a device, because of the large possible number of drilling pins that it comprises, allows the drilling of a plate in a reduced time. Preferably, the bottom wall may be substantially convex, the orifice of the nozzle being provided at the top of the bottom wall. The support of the tip on the plate is even better concentrated in the immediate vicinity and the periphery of the hole, 30 to better maintain the plate both during drilling and when removing the drill. In practice, it is advantageous to provide that the bottom wall has a frustoconical shape, with a conical proximal section whose cross section decreases towards its orifice, and with a plane transverse apex comprising the orifice in its central part. To ensure good evacuation, the suction preferably sucks in a flow greater than the flow of the injection means. When the plate is substantially planar in the vicinity of the hole to be drilled, there may be a relatively tight support of the tip on the plate at the orifice of the tip. But a kind of vacuum depression of the cavity can then occur, which could then interfere with the elastic return of the tip towards its rest position during withdrawal of the drill. In addition, the extraction of fluid and chips by the suction means could be severely reduced. To avoid these disadvantages, it is preferable to provide an air intake orifice shaped and arranged so as to permanently communicate the cavity with the outside. In this way, the suction then draws through the air intake orifice an external air flow substantially equal to the difference between the flow of the suction means and the flow of the injection means. In alternative or in addition, the zones to be pierced generally having a minimum concavity or convexity (an aircraft nacelle having a left surface), it is possible for the orifice of the bottom wall to be dimensioned so as to substantially always partly put the cavity in communication with the outside. The suction then draws through the orifice of the bottom wall an outside air flow substantially equal to the difference between the flow of the suction means and the flow of the injection means. Good results have been obtained with a bottom wall orifice having a diameter greater than or equal to 5 to 10 times the diameter of the drill. But this remains dependent on the particular concavities and / or convexities of the plate to be pierced. Advantageously, the elastic return means may comprise a helical spring disposed coaxially with the drilling direction and around the piercing pin body. Thus arranged, the spring applies a restoring force substantially coaxial with the drilling direction, thus providing a relatively homogeneous support along the entire periphery of the hole. And this further contributes to obtaining a compact drilling spindle. Preferably, the piercing spindle may include sensing means adapted to detect an overlap of the piercing spindle body 30 by the spout to a predetermined length. If the predetermined overlap has a sufficient length, it is thus certain that the plate is held against the piercing support with sufficient force (predetermined) to limit the risk of vibration. Advantageously, the injection means can inject a fluid into the cavity in the direction of the bottom wall. Such injection direction allows to promote the removal of chips away from the plate to prevent them from scratching the plate after being detached. This lifting is induced by the deflection of the fluid by means of the bottom wall. Preferably, it can be provided that: the injection means inject the fluid into the cavity at a first distance from the orifice of the nozzle in the direction of the piercing, the suction orifice is arranged, the drilling direction at a second distance from the mouth of the nozzle which is greater than the first distance. The injection means thus tend to lift the chips away from the plate to bring them to a risk-free area for the plate and in proximity to the suction means so that they suck the chips efficiently. This effectively limits the risk that the chips will scratch the plate after being detached. Preferably, the injection means can inject the fluid into the cavity in an injection direction which passes through the orifice of the nozzle. Fluid 15 is thus directed to the drill and the piercing area to promote lubrication and cooling. Advantageously, the injection means and the suction means may be arranged diametrically opposite to the drilling direction. This ensures that the fluid, before being extracted from the cavity, meets the drill (and possibly the area to be drilled) on its path in the cavity before being evacuated. Preferably, the tip may comprise a substantially cylindrical sleeve forming the substantially tubular side wall, and a bottom wall attached and removably attached to the sleeve. Access to the mandrel is thus quick and easy to assemble / disassemble the drill by simply removing the bottom wall. The bottom wall can be reversibly attached to the sleeve by magnets: disassembly then requires no tools. According to another aspect, the invention proposes a piercing device for drilling a plate, comprising a plate on which is arranged a plurality of piercing pins as described above, oriented in directions of drilling parallel to a direction. average drilling. According to yet another aspect of the invention, there is provided a method of drilling a plate by means of at least one piercing spindle as described above, comprising the following steps: a) positioning the piercing spindle at looking at a given area of the plate, preferably with the drilling direction substantially perpendicular to said determined area of the plate, 66011-T) b) moving the piercing pin body towards the plate until to bring its tip bearing against the plate, c) pierce the plate by translation of the drill according to the drilling direction, and during which, when the tip bears against the plate, a fluid is injected into the cavity the nozzle using the injection means while sucking the contents of the cavity with the suction means. Fluid injection from tip contact against the plate allows for cleaner drilling with less fluid leakage and splashing.
    [0007] Advantageously, before step c), if the displacement of the piercing pin body towards the plate does not make it possible to reach a predetermined overlap of the piercing pin body by the endpiece, then it is forbidden to pierce the plate. For example, the relevant drilling spindle is removed from the workpiece along a sufficient length to avoid any contact of the drill with the plate despite the displacement that will be applied to the other piercing pins to pierce the plate (case of a single spindle or a spindle with individual displacement relative to other identical spindles carried by the same piercing device). It is also possible to remove the entire drilling device comprising a plurality of piercing pins whose displacements are linked.
    [0008] Other objects, features and advantages of the present invention will become apparent from the following description of particular embodiments, with reference to the accompanying drawings, in which: FIG. 1 is a sectional side view in the direction of drilling a particular embodiment of drilling spindle according to the invention; Figures 2 to 5 are side sectional views in the drilling direction of the piercing spindle of Figure 1 during the drilling of a hole in a plate; FIG. 6 is a perspective view of a plate of a drilling device, provided with a drilling pin according to FIG. 1; Fig. 7 is a view similar to that of Fig. 6, with the piercing pin partially exploded; and FIG. 8 is a perspective view of a piercing device comprising a plurality of piercing spindles according to FIG. 1. FIG. 1 illustrates a particular embodiment of rotary piercing spindle 1 according to the invention. . This piercing pin 1 is intended to rotate a drill 2 around a drilling direction I-I. The piercing spindle 1 comprises a piercing spindle body 3 which lengthens according to the drilling direction 14. In order not to complicate the representations in the figures excessively and so as not to impair the understanding of the reader , the piercing spindle body has been simplified in its representation. The piercing spindle 1 comprises a spigot 4 comprising a substantially tubular side wall 5 and a bottom wall 6 provided with an orifice 7. The spigot 4 is disposed coaxially with the piercing direction 14 and sliding on the body of the piercing member. piercing pin 3 in the drilling direction 14 to be movable between at least one rest position (Figures 1 to 3 and 5) and at least one working position (Figure 4).
    [0009] 10 In the rest position (Figures 1 to 3 and 5), the tip 4 is overlapping the piercing pin body 3 according to a first length L1, so that the drill 2 is entirely contained in a cavity 8 delimited by the piercing spindle body 3, the substantially tubular side wall 5 and the bottom wall 6 of the spigot 4.
    [0010] In the working position (FIG. 4), the end piece 4 is overlapped with the piercing pin body 3 along a second length L2, greater than the first Li, so that the cutting end 2a of the drill 2 protrudes out of the cavity 8 through the opening 7 of the bottom wall 6. Elastic return means 9 constantly remind the endpiece 4 4 in the rest position. In this case, the elastic return means 9 comprise a helical spring 9a arranged coaxially with the drilling direction II and around the piercing pin body 3. Injection means 10, comprising an injection nozzle 11, allow injecting a fluid into the cavity 8 via an injection orifice 12.
    [0011] Suction means 13 make it possible to extract a fluid (and chips) from the cavity 8 through an extraction orifice 14. The bottom wall 6 is substantially convex externally, the orifice 7 of the nozzle 4 being provided at the top of the bottom wall 6. In more detail, the bottom wall 6 has a frustoconical shape, with a conical proximal section 6a whose cross section decreases towards its orifice 7, and with a transverse vertex 6b plane having the orifice 7 in its central part. In the bottom wall 6 is also provided an air intake opening 15 communicating the cavity 8 with the outside 80 permanently. Detection means 16 make it possible to detect an overlap of the piercing pin body 3 by the endpiece 4 according to a predetermined length.
    [0012] To do this, the detection means 16 comprise a proximity sensor 17 capable of locating a certain predetermined setback of a rod 18 with respect to the piercing spindle body 3, said rod 18 being itself secured. The injection means 10 make it possible to inject a fluid into the cavity 8 in the direction of the bottom wall 6, and more particularly in a direction of injection II-II which passes through the orifice 7 of the nozzle 4. Note in more detail that: - the injection means 10 inject the fluid into the cavity 8 at a first distance D1 of the orifice of the nozzle 4 in the drilling direction II, The suction orifice 14 is arranged, in the drilling direction II, at a second distance D2 from the orifice of the nozzle 4, which is greater than the first distance D1. In this way, the fluid injected by the injection means quickly strikes the bottom wall 6 and / or the plate to be pierced before being deflected towards the piercing spindle body 3 and the orifice. suction 14 by carrying the chips. The injection means 10 and the suction means 13 are arranged diametrically opposite to the drilling direction II, which allows the injected fluid to perform in the cavity 8 a path substantially similar to that illustrated by the 170, passing around the drill 2 and possibly near the orifice 7. The tip 4 comprises a substantially cylindrical sleeve 4a constituting the substantially tubular side wall 5, and a bottom wall 6 attached and removably attached on the sleeve 4a. It is thus possible to separate the bottom wall 6 of the sleeve 4a in order to access the mandrel 30 of the drilling spindle 1 as more particularly illustrated in FIG. 7. The piercing spindle 1, with its injection and aspiration means 10 13, has a large compactness allowing the arrangement of a plurality of similar drilling pins on a plate 19 of drilling device 20, as illustrated in Figures 6 to 8. For example, the pin 1 illustrated on the Figure 1 shows an overall DHT dimension of about 80 mm. In FIGS. 6 and 7, the plate 19 is shown with only one piercing hole 1, but it also has nine housings 21 each for receiving a piercing spindle 1 to arrive at the piercing device 20 with ten piercing spindles 1 illustrated. in Figure 8.
    [0013] The piercing device 20 is intended to be carried by a Cartesian carrier with 5 or 6 axes or by a polar carrier with 5 or 6 axes, to be moved with respect to a plate to be pierced. In the piercing device 20, the piercing pins 1 are all oriented in the direction of drilling I-I parallel to a mean direction of drilling M-M. FIGS. 2 to 5 illustrate a method of drilling a plate 22 5 by means of a piercing spindle 1 as illustrated in FIG. 1. During a step a), the piercing spindle is positioned 1 with respect to a determined zone Z of the plate 22, preferably with the drilling direction II substantially perpendicular to the determined zone Z of the plate 22. Then, during a step b), the spindle body is moved drilling 3 to the plate 22 until the endpiece 4 bears against the plate 22 (Figure 2). The tip 4 is overlapping the piercing pin body 3 according to the first length L1, so that the cutting end 2a of the drill bit 2 does not protrude out of the cavity 8 through the hole 7 of the bottom wall. 6. The displacement of the piercing spindle body 3 towards the plate 22 is then continued until it reaches the position shown in FIG. 3, in which the cutting end 2a of the drill bit 2 bears against the plate 22. tip 4 is always in the rest position since the drill 2 is still fully contained in the cavity 8. The thrust force applied to the plate 22 by the compression of the coil spring 9a is then sufficient to properly plate 22 on the 20 drilling support (located on the other side of the plate 22 but not shown in the figures to avoid complicating them unnecessarily). However, in some cases the drilling support may be dispensed with, the thrust force applied to the plate 22 and the rigidity of the latter being sufficient to maintain the plate 22 satisfactorily.
    [0014] The support of the nozzle 4 against the plate 22 allows the latter to be pressed against the drilling support so as to limit the risk of vibrations that can lead to a faulty drilling geometry or a defective surface condition. The cavity 8 is then substantially closed (communication with the outside nevertheless remaining possible through the air inlet 15 30 and / or through a portion of the orifice 7. This relative closure of the cavity 8 makes it possible to confine in a very localized manner the injection of fluid and the suction, in order to optimize the lubrication, the cooling and the evacuation of chips From the position illustrated in FIG. 3, any additional relative displacement of the spindle 1 to the plate 22 will cause the piercing pin body 3 to be covered by the endpiece 4 along a length L 2 that protrudes the cutting end 2a of the drill from the cavity 8 through the orifice 7. displacement brings the tip 4 into the working position and allows a hole 23 to be made in the plate 22 (drilling step c) illustrated in FIG. 4). After the hole 23 has been drilled, the drill 2 is withdrawn from the plate 22 by a relative movement of the piercing spindle away from the plate 22. During this withdrawal, the spigot 4 remains supported around of the hole 23 and close to the periphery thereof as long as the drill is housed in the hole 23. In Figure 5, the drill bit 2 is out of the hole 23 while the tip 4 is still pressed against the plate 22 to hold it in place (if necessary to hold it in place by pressing against a drilling medium). This effectively limits the risk of local deformation of the plate 22 around the hole 23 during removal of the drill 2. During the drilling process, when the tip 4 bears against the plate 22, a fluid is injected into the hole. the cavity 8 using the injection means 10 while sucking the contents of the cavity 8 by means of the suction means 13. In this way, the drill is simultaneously lubricated and cooled by the fluid which after having played its role of lubricator and cooler, is extracted out of the cavity 8 by the suction means 13 after having been deflected and oriented by the bottom wall 6 in the direction of the suction port 14. By elsewhere, the flow of fluid injected towards the bottom wall 6 is deflected by the latter, which lifts the material chips from the hole 20 of the plate 22 and conveys them away from the bottom wall 6, and more particularly at the level of the suction port on 14 for their extraction. The piercing spindle 1 illustrated in Figures 1 to 5 has shown good results for drilling a titanium plate, especially for drilling a titanium plate having a thickness of less than or equal to 2 mm.
    [0015] The present invention is not limited to the embodiments which have been explicitly described, but includes the various variants and generalizations thereof within the scope of the claims below.
    [0016] 6601FDEP.docx
    权利要求:
    Claims (15)
    [0001]
    CLAIMS 1 - Drilling spindle (1) rotatable for rotating a drill (2) around a drilling direction (II), having a piercing spindle body (3) extending in the direction of drilling (II) ), characterized in that - a tip (4), having a substantially tubular side wall (5) and a bottom wall (6) provided with an orifice (7), is arranged coaxially with the drilling direction (II). ) and sliding relative to said piercing pin body (3) in the drilling direction (II) to be movable between at least one resting position and at least one working position, - in the rest position, end piece (4) overlaps the piercing spindle body (3) to a first length (L1), so that the drill bit (2) is entirely contained in a cavity (8) delimited by the piercing spindle body ( 3), the substantially tubular side wall (5) and the bottom wall (6) of the mouthpiece (4), In the working direction, the end piece (4) overlaps the piercing pin body (3) along a second length (L2), greater than the first length (L1), so that the cutting end (2a) of the drill (2) protrudes out of the cavity (8) through the hole (7) of the bottom wall (6), - resilient return means (9) permanently removes the tip (4) in position of rest, - injection means (10) for injecting a fluid into the cavity (8) through an injection port (12), - suction means (13) for extracting a fluid out of the cavity (8) 25 by an extraction orifice (14).
    [0002]
    2 - drilling spindle (1) according to claim 1, characterized in that the bottom wall (6) is substantially convex, the orifice (7) of the tip (4) being provided at the top of the bottom wall (6).
    [0003]
    3 - Drilling spindle (1) according to claim 2, characterized in that the bottom wall (6) has a frustoconical shape, with a conical proximal section (6a) whose cross section decreases towards its orifice (7). ), and with a transverse vertex (6b) plan comprising the orifice (7) in its central part.
    [0004]
    4- drilling spindle (1) according to any one of claims 1 to 3, characterized in that it comprises an air inlet (15) communicating the cavity (8) with the outside preferably provided in the bottom wall (6). 6601FDEP.docx 3036639 12
    [0005]
    5. Drilling spindle (1) according to any one of claims 1 to 4, characterized in that the elastic return means (9) comprise a helical spring (9a) arranged coaxially with the drilling direction (II) and around the piercing spindle body (3).
    [0006]
    6 - drilling spindle (1) according to any one of claims 1 to 5, characterized in that it comprises detection means (16) adapted to detect an overlap of the piercing pin body (3) by the nozzle (4) according to a predetermined length.
    [0007]
    7 - Drilling spindle (1) according to any one of claims 1 to 6, characterized in that the injection means (10) inject a fluid into the cavity (8) in the direction of the bottom wall (6) .
    [0008]
    8 - Drilling spindle (1) according to claim 7, characterized in that: - the injection means (10) inject the fluid into the cavity (8) at a first distance (D1) from the orifice (7) of the nozzle (4) according to the drilling direction (II), - the suction orifice (14) is arranged, in the drilling direction (II), at a second distance (D2) from the orifice ( 7) of the tip (4) which is greater than the first distance (D1).
    [0009]
    9 - Drilling spindle (1) according to any one of claims 1 to 8, characterized in that the injection means inject the fluid into the cavity (8) in a direction of injection (II-II) which passes through the orifice (7) of the nozzle (4).
    [0010]
    10 - drilling spindle (1) according to any one of claims 1 to 9, characterized in that the injection means (10) and the suction means (13) are arranged diametrically opposite to the drilling direction (II).
    [0011]
    11 - Drilling spindle (1) according to any one of claims 1 to 10, characterized in that the tip (4) comprises a substantially cylindrical sleeve (4a) constituting the substantially tubular side wall (5), and a wall bottom (6) attached and removably attached to the sleeve (4a).
    [0012]
    12 - Drilling device (20) for drilling a plate (22), comprising a plate (19) on which is arranged a plurality of piercing pins (1) according to any one of claims 1 to 11, oriented according to drilling directions (II) parallel to a mean direction of drilling (MM).
    [0013]
    13 - A method of drilling a plate (22) by means of at least one piercing pin (1) according to any one of claims 1 to 11, comprising the following steps: 660 IFDEP.docx 3036639 13 a) position the piercing spindle (1) with respect to a determined zone (Z) of the plate (22), preferably with the drilling direction (II) substantially perpendicular to said determined zone (Z) of the plate (22), b) moving the piercing spindle body (3) towards the plate (22) to bear its end piece (4) bearing against the plate (22), c) piercing the plate (22) by translation of the drill bit (2) according to the drilling direction (M), and during which, when the end piece (4) bears against the plate (22), a fluid is injected into the cavity (8) of the end piece (4). ) using the injection means 10 (1 0) while sucking the contents of the cavity (8) with the suction means (13).
    [0014]
    14 - Use of at least one piercing spindle (1) according to any one of claims 1 to 11 for drilling a plate (22) of titanium.
    [0015]
    15 - Use according to claim 14, characterized in that the plate (22) of titanium has a thickness less than or equal to 2 mm.
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    同族专利:
    公开号 | 公开日
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    FR2323496A1|1975-09-09|1977-04-08|Infranor Sa|ROTARY TOOL MACHINE-TOOL|
    US4917547A|1989-02-09|1990-04-17|Frederickson Jeffrey W|Apparatus and method for dispensing solution to prevent smear in the manufacture of printed circuit boards|
    EP0383652A1|1989-02-13|1990-08-22|Societe De Construction Des Avions Hurel-Dubois|Method of piercing a board with a very high density of holes, and of whatever shape, and resultant products|
    US5087156A|1990-11-30|1992-02-11|Hitachi Seiko Ltd.|Printed circuit board boring machine|CN107617927A|2017-09-19|2018-01-23|哈尔滨理工大学|A kind of low-temperature trace lubricates machining oil atomization ejecting device|
    CN108515207A|2018-04-12|2018-09-11|于浩|A kind of electronic component production drilling device with decrease of noise functions|
    CN110125449A|2019-06-26|2019-08-16|天地（唐山）矿业科技有限公司|A kind of banana-shaped flip flop screen floating screen frame matches drill method|
    法律状态:
    2016-05-18| PLFP| Fee payment|Year of fee payment: 2 |
    2016-12-02| PLSC| Publication of the preliminary search report|Effective date: 20161202 |
    2017-09-01| PLFP| Fee payment|Year of fee payment: 3 |
    2018-05-17| PLFP| Fee payment|Year of fee payment: 4 |
    2019-05-24| PLFP| Fee payment|Year of fee payment: 5 |
    2020-05-23| PLFP| Fee payment|Year of fee payment: 6 |
    2021-05-22| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1554921A|FR3036639B1|2015-05-29|2015-05-29|FLUID INJECTION DRILLING DEVICE|FR1554921A| FR3036639B1|2015-05-29|2015-05-29|FLUID INJECTION DRILLING DEVICE|
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