Device and method of drilling lamination material using high pressure jet flow

Abstract

To inhibit a lag between a timing that high pressure water is jetted and a timing that an abrasive material is jetted and thereby prevent occurrence of delamination of a lamination material.SOLUTION: A lamination material drilling device uses high pressure jet flow and includes: a nozzle head having a mixing chamber for mixing high pressure water supplied from a high pressure water supply device with an abrasive material supplied from an abrasive material supply device, and a nozzle for jetting high pressure jet flow from the mixing chamber; and a jet flow adjustment unit which causes the high pressure jet flow to collide with a through member before colliding with a workpiece and adjusts a colliding timing of the abrasive material with the workpiece.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an apparatus and method for drilling holes in laminated material using a high-pressure jet. [Background technology]

[0002] Conventionally, when holes are drilled in laminated materials such as carbon fiber reinforced plastics, the laminated materials are formed from multiple layers, and therefore, as a processed shape after drilling, delamination between layers and the like often occurs, and various devices and methods for drilling holes using tools and equipment such as drills have been disclosed. In addition, various devices and methods other than those using tools and equipment have also been studied.

[0003] For example, Patent Document 1 discloses a method of using a water jet to cut a foam laminate into a required shape, in which the water jet penetrates the foam and collides perpendicularly against an orthogonal receiving surface to process the foam through the base material. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2004-154896 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the above-mentioned Patent Document 1, processing is performed by drilling holes vertically into the laminate, but since the water jet is sprayed and collided directly against the laminate, there was a concern that it was difficult to take into account the state of the water jet and the load on the laminate.

[0006] Furthermore, when using a high-pressure jet containing an abrasive, there may be a discrepancy in the timing at which the abrasive is mixed into the high-pressure water, and if the high-pressure jet reaches at least a part of the surface or interior of the laminate when there is an insufficient abrasive compared to the amount (proportion and distribution) of high-pressure water, delamination may occur, leading to a decrease in drilling quality, etc.

[0007] Therefore, an object of the present invention is to prevent the occurrence of delamination of laminated materials without being affected by deviations in the timing at which the high-pressure water and the abrasive are mixed. [Means for solving the problem]

[0008] In order to solve the above-mentioned problems, the present invention provides an apparatus for drilling holes in laminated materials using a high-pressure jet, which comprises a mixing chamber for mixing high-pressure water supplied from a high-pressure water supply device and an abrasive supplied from an abrasive supply device, a nozzle head having a nozzle for spraying a high-pressure jet from the mixing chamber, and a jet adjustment unit for colliding the high-pressure jet with a penetrating member before it impacts with the workpiece and for adjusting the timing of the impact of the abrasive with the workpiece.

[0009] In order to solve the above-mentioned problems, the method of drilling holes in laminated materials of the present invention includes a spraying process in which a high-pressure jet mixed with high-pressure water supplied from a high-pressure water supply device and an abrasive supplied from an abrasive supply device is sprayed from a nozzle, a penetrating member penetrating process in which the high-pressure jet is caused to collide with and penetrate a penetrating member before colliding with the workpiece, and a workpiece penetrating process in which the high-pressure jet is caused to collide with and penetrate the workpiece. Effect of the Invention

[0010] Provided is an apparatus and method for drilling holes in laminated material using a high-pressure jet that can suppress misalignment between the timing at which high-pressure water and an abrasive are sprayed and prevent delamination of the laminated material. [Brief description of the drawings]

[0011] [Figure 1] Schematic diagram of the laminated material drilling device (basic state) using the high-pressure jet of this embodiment [Diagram 2] Schematic diagram of a laminated material drilling device using a high-pressure jet according to the present embodiment (in the state where a penetrating member is attached) [Diagram 3] Schematic diagram of the laminated material drilling device using the high-pressure jet of this embodiment (after rotation) [Figure 4] FIG. 1A is a front view showing details of the placement portion of this embodiment; FIG. 1B is a front view showing details of the placement portion of another embodiment; [Diagram 5] 2 is a schematic diagram of a laminated material drilling device using a high-pressure jet according to the second embodiment of the present invention. [Figure 6] FIG. 2 is a perspective view of the flow adjustment unit according to the second embodiment; [Figure 7] FIG. 13A is a perspective view of the flow adjustment unit of the third embodiment, and FIG. [Figure 8] Flowchart for drilling holes in laminates using high pressure jets BEST MODE FOR CARRYING OUT THEINVENTION

[0012] Next, an embodiment of the present invention will be described with reference to the drawings as appropriate.

[0013] (Configuration of a machine for drilling holes in laminated materials using high-pressure jets) The laminate drilling device 1 using a high-pressure jet according to this embodiment (first embodiment) processes (drills) a workpiece (laminate) W with a high-pressure jet J consisting of high-pressure water L and an abrasive AB, as shown in Figures 1 to 3. The workpiece W is preferably a fibrous sheet impregnated with carbon fiber reinforced plastic (CFRP) or resin, or a sheet made of only fibers. The laminated material drilling device 1 includes a high-pressure water supply device P, an abrasive supply device A, a nozzle head 2, a catcher 3, a thin plate 4, a jet flow adjustment unit 5, and a control unit 20.

[0014] The high-pressure water supplying device P is a pump that generates high-pressure water L. The high-pressure water supplying device P can pressurize the high-pressure water within a range of 20 to 300 MPa. The pressure of the high-pressure water is set according to the material, hardness, shape, thickness, etc. of the workpiece. A specific example of the high-pressure water supplying device P is preferably an intensifier pump or the like.

[0015] The abrasive supplying device A is a part that supplies the abrasive AB to the nozzle head 2 by pumping it. A high-pressure jet J, which is a mixture of high-pressure water L supplied from the high-pressure water supplying device P and the abrasive AB supplied from the abrasive supplying device A, is sprayed from the nozzle 2a. The abrasive AB may be any material having a certain hardness, such as garnet, and the particle size can also be changed as appropriate.

[0016] The nozzle head 2 sprays from the nozzle 2a a high-pressure jet J which is a mixture of high-pressure water L supplied from a high-pressure water supply device P and abrasive AB supplied from an abrasive supply device A in a mixing chamber 2b. The nozzle head 2 can move in the X, Y and Z directions by a movement mechanism which realizes two-dimensional and three-dimensional movement along the X, Y and Z axes.

[0017] The catcher 3 places the workpiece W inside and collects chips and the like after machining. Although not shown in the specification, it is also possible to fill the catcher 3 with water by connecting a liquid supply pump. By machining the workpiece W below the water surface, it is possible to reduce the effects of heat generated during machining, which leads to a reduction in the load on the workpiece W and the like during machining.

[0018] Additionally, lattice-like thin plates 4 are placed inside the catcher 3. The high-pressure jet J is sprayed downward, but if it were to directly collide with the bottom surface inside the catcher, the bottom surface would be damaged. By using the lattice-like thin plates 4, damage to the device caused by the high-pressure jet J can be prevented. The number and thickness of the thin plates 4 are such that the high-pressure water L can escape, and they are placed at equal intervals on the left and right.

[0019] As shown in Figs. 1 to 4, the jet flow adjustment unit 5 causes the high-pressure jet J to collide with a penetrating member R before colliding with the workpiece W, and adjusts the collision timing of the abrasive AB according to the thickness of the penetrating member R. Furthermore, by adjusting the amount of abrasive, pressure, etc., it is possible to optimize the collision timing of the high-pressure jet J (high-pressure water L and abrasive AB) with the workpiece W. The penetrating member R is preferably a metal member, such as stainless steel or aluminum. The thickness of the penetrating member R may be 0.1 to 0.5 mm, for example. The flow adjustment unit 5 has a main body 5a, a mounting portion 5b, a shaft portion 5c, and a rotating portion 5d. Note that the flow adjustment unit 5 may also be a commercially available articulated robot or the like.

[0020] The main body 5a is the main body of the jet flow adjustment unit 5. As shown in Figs. 1 to 3, it may be connected to the nozzle head 2 or may be a separate body.

[0021] The placement portion 5b is a head that places the penetrating member R on the workpiece W. As shown in FIG. 4(a), the placement portion 5b has a piston 5ba, a pressurizing chamber 5bb, and a suction device 5bc.

[0022] When oil, air, water, etc. supplied from a power source (hydraulic, air, water, etc.) (not shown) is supplied into the pressurizing chamber 5bb, the piston 5ba moves downward, and the suction device 5bc also moves downward, and the penetrating member R adheres to the workpiece W. When oil, air, water, etc. supplied from a power source (hydraulic, air, water, etc.) (not shown) is discharged from the pressurizing chamber 5bb, the piston 5ba moves upward, and the suction device 5bc also moves upward. The height of the suction device 5bc can be adjusted by controlling the flow rate, speed, etc. of the power source (not shown). The suction device 5bc can switch between suction and desorption of the penetrating member R. For example, a single or multiple suction holes are formed on the lower surface of the suction device 5bc, and the suction hole is used to switch between suction and non-suction of the surrounding air from a suction device (not shown), thereby switching between suction and desorption of the penetrating member R.

[0023] As another embodiment of the attachment / detachment device 5bc, a hand or the like may be used to pick up the penetrating member R. As another embodiment, the number of attachment / detachment devices 5bc may be increased, or the attachment / detachment device 5bc may be configured to be able to switch between suction and detachment of a plurality of penetrating members R at its tip all at once or stepwise.

[0024] In another embodiment, the penetrating member R may be attached to one side (front side) of the workpiece W, and then the workpiece W may be turned over and another penetrating member R may be attached to the other side (back side) in the same manner. In this case, the role of the penetrating member R attached to the back side is to prevent delamination when the high-pressure jet J penetrates. Therefore, it is desirable to set the area of ​​the penetrating member R attached to the back side larger than the area of ​​the penetrating member R attached to the front side.

[0025] The shaft portion 5c connects the main body 5a and the placement portion 5b, and adjusts the position of the placement portion 5b. For example, it is a linear guide, a ball screw, etc. It is operated by a power source (not shown).

[0026] The rotating part 5d is connected to the lower part of the main body 5a and rotates the main body 5a and the placement part 5b. It is operated by using a power source (not shown).

[0027] The penetrating member R is composed of a metal member M and an adhesive member B, and has a structure in which the metal member M is on the upper surface and the adhesive member B is on the lower surface, so that the penetrating member R can be adhered to the workpiece W, the center of the penetrating member R is positioned, and then a hole drilling operation can be performed. The penetrating member R is preferably a metal member, for example, stainless steel, aluminum, etc. are preferable. The thickness of the penetrating member R may be 0.1 to 0.5 mm, etc. The adhesive member B can be an adhesive tape, an adhesive, etc. For example, the adhesive tape or adhesive is one that does not peel off or shift during processing, and is preferably an epoxy adhesive or an acrylic adhesive that has excellent mechanical properties, electrical properties, and durability.

[0028] The penetrating member R may also be made of different materials for the inside (inner side) and outside (edge ​​side) so that the penetrating portion does not impede the drilling. By making the hardness of the outside higher than that of the inside, it is possible to drill only the penetration width of the hole to be drilled. Furthermore, a fluid (e.g., water) may be supplied from a fluid supply device (not shown) to flow into the catcher 3 so that the penetrating portion of the penetrating member R does not roll up or interfere with the drilling. The fluid supply device (not shown) may be one that supplies the fluid from the upper side (diagonal direction) of the catcher 3, or the like.

[0029] (Configuration of the Laminated Material Drilling Device Using a High-Pressure Jet in the Second Present Embodiment) The laminated material drilling device 1B using a high-pressure jet according to the second embodiment processes (drills) a workpiece (laminate) W with a high-pressure jet J consisting of high-pressure water L and an abrasive AB, as shown in Figures 5 to 7. The workpiece W is preferably carbon fiber reinforced plastic (CFRP) or the like. The basic configuration is similar to that of the first embodiment, but the configuration of the jet flow adjustment unit 5B is different.

[0030] 5 to 7, the jet flow adjustment unit 5B causes the high-pressure jet J to collide with a penetrating member R before colliding with the workpiece W, and equalizes the amount of abrasive AB contained in the high-pressure jet J when it collides with the workpiece W. By adjusting the amount of abrasive, pressure, etc., it is possible to optimize the collision timing of the high-pressure jet J (high-pressure water L and abrasive AB) with the workpiece W. The jet flow adjustment unit 5B has a main body 5Ba, a mounting portion 5Bb, a shaft portion 5c, and a rotating portion 5d.

[0031] The main body 5Ba is the main body of the jet flow adjustment unit 5B. As shown in Figs. 5 to 7, it may be connected to the nozzle head 2 or may be a separate body.

[0032] The shaft portion 5Bb is a shaft connected to the main body 5Ba. The distance between the high pressure jet J ejected from the nozzle 2a and the workpiece W is 0.1 to 5.0 mm, and the shaft portion 5Bb is for adjusting the position within this range.

[0033] The penetrating portion 5Bc is a location where the penetrating member R is disposed and temporarily fixed above the workpiece W, and a through hole 5Bca is formed in the center by the ejection of the high-pressure jet J. The through hole 5Bca may be, for example, circular, and may have any size (inner diameter) that allows the high-pressure jet J to pass through.

[0034] The supply unit 5Bd supplies the penetrating member R to the penetrating unit 5Bc. For example, when the penetrating member R is a stainless steel sheet, the stainless steel sheet is continuously or temporarily pushed out by a power source (not shown). After the jet L is sprayed onto the penetrating member R, a cavity h is formed in the penetrating member R, and the penetrating member R penetrates the workpiece W, the penetrating member R is further pushed out in preparation for the next hole to be drilled.

[0035] The recovery unit 5Be recovers the penetrating member R in which the cavity h is formed. In order to prevent delamination from forming in the workpiece W, which is a laminate, the jet L is temporarily sprayed on the penetrating member R to penetrate it, so that the jet L in a stable state is sprayed on the workpiece W. In order to prevent this, it is necessary to keep the penetrating member R without the cavity h exposed at the through hole 5Bca of the penetration part 5Bc at all times. Therefore, the recovery unit 5Be recovers the penetrating member R after use to stabilize the drilling conditions. The recovery unit 5Be recovers the stainless steel sheet by continuously or temporarily winding it up using a power source (not shown). When recovering, it is possible to assume that the stainless steel sheet is formed into a spiral shape in cross section. It is also possible to configure the recovery unit 5Be so that a drive source is separately arranged outside the recovery unit 5Be and the amount of the penetrating member R that is wound up is automatically adjusted by the operation of the control unit 20.

[0036] 7(a) and (b), the rotating part 5Bf can also be disposed. After drilling a hole in the workpiece W, the nozzle head 2 can be moved in any of the X, Y, and Z directions to move the trajectory of the jet L, and the workpiece W can be cut or otherwise processed. Thus, the penetrating part 5Bc (penetrating member R) is used when drilling a hole, but when drilling is not performed, the penetrating member R is not used. Therefore, a part of the penetrating part 5Bc is connected to the rotating part 5Bf, and the rotating part 5Bf can be rotated and withdrawn to change the position of the penetrating part 5Bc.

[0037] 6(a) and 6(b), the jet flow adjustment unit 5B can also adjust its position in the XYZ directions by an XYZ-axis adjustment mechanism 6. The XYZ-axis adjustment mechanism 6 has an X-axis adjustment mechanism 6a, a Y-axis adjustment mechanism 6b, and a Z-axis adjustment mechanism 6c. Any mechanism capable of moving each axis using a power source (not shown) can be used, and can be selected from linear guides, ball screws, and the like.

[0038] Also, a pressure sensor may be placed in the through hole 5Bca, and when a predetermined pressure is reached, the through hole 5Bca opens and a high-pressure jet J is caused to collide with the workpiece W. By switching the through hole 5Bca between open and closed (through, non-through), wear and tear on the penetrating member R can be eliminated (reduced).

[0039] The control unit 20 controls the amount, pressure, speed, etc. of the high-pressure water L from the high-pressure water supply device P and the abrasive AB from the abrasive supply device A. The control unit 20 also has a numerical control function, and cuts the workpiece W according to the rotation, angle, speed, etc. that are set in advance or in real time. In addition, the operation of the high-pressure jet J can be controlled while checking the state of the penetrating member R attached to the front and / or back surface of the workpiece W, and the state of the high-pressure water L and the high-pressure jet J, using cameras and sensors not shown.

[0040] For example, as shown in Fig. 5, the control unit 20 can be provided with a time setting means 20A, an abrasive passing amount setting means 20B, a nozzle height setting means 20C, etc. The time setting means 20A is for setting the time until the abrasive AB collides with the penetrating member R with respect to the height of the nozzle 2a. The abrasive passing amount setting means 20B is for setting an appropriate amount of the abrasive AB required until it collides with the penetrating member R depending on the passing amount of the abrasive AB. The nozzle height setting means 20C is for adjusting the time in the time setting means 20A and the amount of the abrasive AB in the abrasive passing amount setting means 20B depending on the distance from the nozzle height to the penetrating member R.

[0041] A method for drilling holes in laminated materials using a high-pressure jet according to this embodiment will be described.

[0042] First, the jet flow adjustment units 5, 5B are used to attach the penetrating member R to the surface (the area to be drilled) of the workpiece W. This attachment work may be assisted manually, but is set so that the center of the penetration position of the high-pressure jet J in the workpiece W roughly coincides with the center of the penetrating member R. When automating the attachment work, a camera or sensor (not shown) is used to set so that the position of the penetrating member R to be attached to the surface and / or back surface of the workpiece W coincides with the positions of the high-pressure water L and the high-pressure jet J.

[0043] Next, high-pressure water L supplied from the high-pressure water supply device P and abrasives AB supplied from the abrasive supply device A are mixed in the mixing chamber 2b, and a high-pressure jet J is sprayed from the nozzle 2a (spraying step S1). The high-pressure jet J has a pressure of 50 to 200 MPa.

[0044] Next, the high-pressure jet J is caused to collide with and penetrate the penetrating member R before colliding with the workpiece W (penetrating member penetration step S2). In the initial injection of the injection step S1, the high-pressure water L is injected first, but the abrasive AB may be mixed in later. Therefore, by causing the high-pressure jet J to collide with and penetrate the penetrating member R before colliding with the workpiece W, the amount of abrasive AB contained in the high-pressure jet J is made uniform, and holes can be drilled while taking into consideration the state of the high-pressure jet J and the load on the laminate.

[0045] Next, the high-pressure jet J is caused to collide with and penetrate the workpiece W (workpiece penetration step S3). By adjusting the state of the high-pressure jet J and then causing the high-pressure jet J to collide with and penetrate the workpiece W, it is possible to prevent the occurrence of delamination.

[0046] Also, after the penetrating member penetrating step A2, the penetrating member R after penetration can be replaced (Penetrating member replacing step S4). By replacing the penetrating member R, it is possible to adjust the jet flow using the penetrating member R each time in response to the ON / OFF of the high-pressure jet J. For example, when cutting the workpiece W while moving the high-pressure jet J in a single stroke, the initial one-time jet flow adjustment is sufficient, but when it is necessary to draw a complex cutting shape or trajectory, it is necessary to adjust the jet flow in accordance with the ON / OFF timing of the high-pressure jet J, and it is possible to attach a penetrating member R each time and perform hole drilling, or to attach multiple penetrating members R from the beginning and perform hole drilling.

[0047] Furthermore, when performing the above work, each operation can be controlled to link the movement of the nozzle head 2 and the movement of the flow adjustment unit 5. Specifically, the attachment position of the penetrating member R is determined by aligning the center position of the placement portion 5b with the position to be drilled, and the penetrating member R is attached to the workpiece W. After that, the flow adjustment unit 5 is moved to a position away from the nozzle head 2. Then, the center position of the nozzle head 2 is aligned with the position to be drilled, thereby stabilizing the drilling accuracy.

[0048] As another embodiment, a penetrating member R is attached not only to the front surface (the portion to be drilled) of the workpiece W but also to the back surface, and then the workpiece W and the multiple penetrating members R are penetrated by a high-pressure jet J, thereby preventing delamination from occurring around the front surface and back surface of the workpiece W. Furthermore, the position of a fluid supply device (not shown) can be changed so that the fluid can be supplied from any angle, either above, below, or to the side.

[0049] As described above, the present invention is not limited to the above-described embodiment, and it goes without saying that the present invention can be modified appropriately without departing from the spirit and scope of the present invention. [Explanation of symbols]

[0050] 1 Water jet drilling equipment for laminated materials 2 Nozzle Head 2a Nozzle 3. Catcher 4 thin plate 5. Jet adjustment unit 5a Main unit 5b Placement part 5c Shaft 5d Swivel section 6 XYZ axis adjustment mechanism S1 injection process S2 Penetrating member penetration process S3 Workpiece penetration process S4 Penetration member replacement process

Claims

1. A drilling device for laminated materials using a high-pressure jet, the nozzle head having a mixing chamber that mixes high-pressure water supplied from a high-pressure water supply device and an abrasive supplied from an abrasive supply device, and a nozzle that sprays a high-pressure jet from the mixing chamber, and a jet adjustment unit that causes the high-pressure jet to collide with a penetrating member before colliding with the workpiece and adjusts the collision timing of the abrasive with the workpiece.

2. The device for drilling holes in laminated materials using a high-pressure jet as described in claim 1, wherein the jet adjustment unit has a mounting portion for mounting the penetrating member, an axis portion for changing the position of the mounting portion, and a rotating portion for rotating the mounting portion.

3. 3. The apparatus for drilling holes in laminated materials using a high-pressure jet according to claim 2, wherein the placement portion has a suction device for suctioning the penetrating member, and a piston for adjusting the height of the suction device.

4. The device for drilling holes in laminated materials using a high-pressure jet as described in claim 1, wherein the jet adjustment unit has a supply section that supplies the penetrating member, a penetration section that exposes the penetrating member and penetrates it with the high-pressure jet, and a recovery section that recovers the penetrating member after penetration.

5. 5. The device for drilling holes in laminated materials using a high-pressure jet according to claim 1, wherein the penetrating member is a stainless steel member.

6. 5. The device for drilling holes in laminated materials using a high-pressure jet according to claim 1, wherein the penetrating member is composed of a stainless steel member arranged on an upper surface and an adhesive member arranged on a lower surface.

7. 5. The device for drilling holes in laminated materials using a high-pressure jet according to claim 1, wherein the penetrating member has a higher hardness on the outside than on the inside.

8. A method for drilling a laminated material using a high-pressure jet, comprising: a jetting step of jetting from a nozzle a high-pressure jet that is a mixture of high-pressure water supplied from a high-pressure water supply device and an abrasive supplied from an abrasive supply device; a penetrating member penetrating step of causing the high-pressure jet to collide with and penetrate a penetrating member before colliding with a workpiece; and a workpiece penetrating step of causing the high-pressure jet to collide with and penetrate the workpiece.

9. 8. The method for drilling holes in laminated material using a high-pressure jet according to claim 7, further comprising a penetrating member replacement step of replacing the penetrating member after the penetrating member penetration step.

Images