A steel clip punching die and method for aircraft brake disc

Abstract

The present invention relates to the field of mechanical processing technology, and in particular to a steel clip punching die and method for aircraft brake discs, comprising a lower die seat and an upper die seat, wherein a slider seat is installed on the upper surface of the lower die seat, a slider is slidably installed on the slider seat, a puncher is installed on the lower surface of the upper die seat, and a plurality of punching needles are installed on the puncher; a plurality of punching holes are opened through the slider, a plurality of blanking holes are opened through the slider seat, a punching cylinder is vertically fixed above the slider seat, and a plurality of punching rods are fixedly installed on the end of the output shaft of the punching cylinder; the present invention also provides a method for punching a steel clip using the punching die. The present invention simplifies the processing process and improves production efficiency by using the steel clip punching die to directly punch the steel clip, and at the same time, the steel clip punching die is provided with a floating positioning pin to position the steel clip and a positioning rod to lock the slider, thereby improving the consistency of product size after forming.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing, and in particular to a steel clip punching die and a method for an aircraft brake disc. Background Art

[0002] As attached Fig.12 As shown in the figure, it is a steel clip used on the aircraft brake disc. The dimensional accuracy of the workpiece is very high. It is required to fit tightly with the aircraft brake disc after assembly. During assembly, the steel clip needs to be fastened to the brake disc through 4 rivets, so the holes on both sides of the steel clip must be concentric. The size of the mounting hole on the steel clip is Ø6.1, so as to ensure that the rivet can pass smoothly. Conventional processing is to make tooling with machine tools, then use a drill to drill, then change the reamer to ream the hole to the size required by the drawing, and finally the fitter removes the burrs produced by the drilling one by one. Because the steel clip is made of stainless steel, the hardness of stainless steel is relatively high, and the drill and reamer with severe wear need to be replaced regularly and irregularly in the middle. Although the size and concentricity of the mounting hole can be guaranteed, the production efficiency is extremely low. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcoming of low production efficiency of steel clips processed by machine tools in the prior art, and to propose a steel clip punching die and method for aircraft brake discs.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A steel clip punching die for aircraft brake discs is designed, comprising a lower die seat and an upper die seat, wherein a slider seat is installed on the upper surface of the lower die seat, a slider is slidably installed on the slider seat, the slider is connected to a driving cylinder, a stopper corresponding to the slider is fixed on the slider seat, a punch is installed on the lower surface of the upper die seat, and a plurality of punching needles are installed on the punch;

[0006] The slider is penetrated by a plurality of punching holes which are arranged one-to-one corresponding to the punching needles, the slider seat is penetrated by a plurality of blanking holes which are arranged one-to-one corresponding to the punching holes, and the blanking holes penetrate downwardly through the lower die seat; a punching cylinder is vertically fixed above the slider seat, and a plurality of punching rods are fixedly installed on the end of the output shaft of the punching cylinder, and the punching rods are arranged one-to-one corresponding to the blanking holes.

[0007] Preferably, a plurality of first positioning holes are vertically penetrated on the slider seat, a plurality of second positioning holes are vertically penetrated on the lower die seat, the first positioning holes and the second positioning holes are arranged in one-to-one correspondence, a positioning rod is inserted between every two corresponding first positioning holes and second positioning holes, a positioning cylinder is vertically fixed on the lower die seat, the positioning rods are fixedly connected to the output shaft of the positioning cylinder, and the slider is provided with third positioning holes arranged in one-to-one correspondence with the plurality of first positioning holes.

[0008] Preferably, a floating positioning pin is also vertically telescopically mounted on the slider seat.

[0009] Preferably, an inner cylinder is coaxially fixed in the punching hole, and the inner cylinder includes a first cylinder body and a second cylinder body, the first cylinder body and the second cylinder body are coaxially fixedly connected, the first cylinder body is arranged toward the top of the upper mold base, the inner diameter of the first cylinder body is larger than the second cylinder body, and an annular cavity is coaxially opened on the inner wall of the punching hole, and the connecting part between the first cylinder body and the second cylinder body is in the shape of an inverted cone as a whole, and an oblique hole is opened circumferentially through the connecting part between the first cylinder body and the second cylinder body, and the oblique hole is connected with the inside of the annular cavity, and a first elastic membrane is arranged in each of the oblique holes, and the edge of the first elastic membrane is fixed to the inner wall of the oblique hole so that the first elastic membrane can separate the oblique hole.

[0010] The annular cavity is connected to an inflation and deflation module, and the inflation and deflation module is used to inflate or deflate the annular cavity so that the gas in the annular cavity can repeatedly squeeze the first elastic membrane.

[0011] Preferably, the inflation and deflation module comprises a plurality of through holes, the inner wall of the second cylinder is circumferentially provided with a plurality of through holes, the through holes are connected to the annular cavity, and each of the through holes is covered and fixed with a second elastic membrane at one end facing the central axis of the second cylinder.

[0012] Preferably, the second elastic membrane is in a semi-spherical shape as a whole.

[0013] Preferably, the inner diameter of the oblique hole decreases from the outside to the inside.

[0014] The present invention also provides a method for punching holes in a steel clip for an aircraft brake disc, and the specific method is as follows:

[0015] S1. Put the steel clip to be punched into the slider seat on the lower die seat. At this time, the floating positioning pin will not play a positioning role and will be pressed into the slider seat by the steel clip. The cylinder is driven to ventilate, and the slider presses the steel clip onto the stopper.

[0016] S2, the positioning cylinder is ventilated, and the two positioning rods move upward and extend into the third positioning hole of the slider to lock the slider, thereby ensuring the position accuracy of the slider;

[0017] S3, start the punch, so that the punch drives the punch needle to punch out four holes on the upper side of the steel clip;

[0018] S4, then the positioning cylinder returns to its original position, the driving cylinder returns to its original position, and then the stamped steel clip on one side is taken out, and the floating positioning pin is reset and popped out; the punching cylinder is ventilated, and the punching cylinder pushes the punching rod to insert into the punching hole of the slider, and the waste material in the punching hole is ejected and falls out of the mold through the blanking hole on the slider seat;

[0019] S5. Place the steel clip with four holes punched, with the holes facing downward. At this time, two floating positioning pins will penetrate into two of the punched holes in the steel clip, playing a positioning role and ensuring the concentricity of the holes on both sides of the steel clip.

[0020] S6. Repeat steps S1-S5 until the punching of the steel clip is completed.

[0021] The invention provides a steel clip punching die and method for aircraft brake discs, which have the following beneficial effects:

[0022] By using the steel clip punching die to directly punch the steel clip, the processing process is simplified and the production efficiency is improved. At the same time, the steel clip punching die is provided with a floating positioning pin to position the steel clip and a positioning rod to lock the slider, thereby improving the consistency of the product size after forming.

[0023] By arranging an inner cylinder in the punching hole, and arranging a plurality of oblique holes and through holes in the inner cylinder, and arranging a first elastic membrane and a second elastic membrane on the oblique hole and the through hole respectively, metal debris generated during the punching process will fall into the oblique hole, and when the punching cylinder pushes the punching rod into the punching hole, the second elastic membrane will be squeezed, so that the first elastic membrane will eject the metal debris in the oblique hole. At this time, the metal debris can fall into the blanking hole, thereby minimizing the amount of debris entering between the slider and the slider seat, thereby greatly reducing the wear between the slider and the slider seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure of a steel clip punching die for an aircraft brake disc proposed by the present invention Figure 1 ;

[0025] Figure 2 A schematic diagram of the structure of a steel clip punching die for an aircraft brake disc proposed by the present invention Figure 2 ;

[0026] Figure 3 A schematic diagram of the structure of a steel clip punching die for an aircraft brake disc proposed by the present invention Figure 3 ;

[0027] Figure 4 A schematic side view of the structure of a steel clip punching die for an aircraft brake disc proposed by the present invention;

[0028] Figure 5 This is a front view structural schematic diagram of a steel clip punching die for an aircraft brake disc proposed by the present invention;

[0029] Figure 6 This is a structural schematic diagram of a slider and a slider seat of a steel clip punching die for an aircraft brake disc proposed by the present invention;

[0030] Figure 7 This is a schematic diagram of the structure of a slider seat of a steel clip punching die for an aircraft brake disc proposed by the present invention;

[0031] Figure 8 This is a schematic diagram of the structure of a punching rod and a punching cylinder of a steel clip punching die for an aircraft brake disc proposed by the present invention;

[0032] Fig. 9 This is a schematic diagram of the structure of a slider of a steel clip punching die for an aircraft brake disc proposed by the present invention;

[0033] Fig.10 This is a schematic diagram of the position structure of the inner cylinder of a steel clip punching die for an aircraft brake disc proposed by the present invention;

[0034] Fig.11 This is a schematic diagram of a state after a punching rod of a steel clip punching die for an aircraft brake disc proposed by the present invention is inserted into a punching hole;

[0035] Fig.12 This is a schematic diagram of the structure of the steel clip processed by the present invention.

[0036] In the figure: 1. lower die seat; 2. upper die seat; 3. punch; 4. punch needle; 5. slider seat; 6. slider; 7. blanking hole; 8. driving cylinder; 9. punching hole; 10. third positioning hole; 11. first positioning hole; 12. floating positioning pin; 13. punching cylinder; 14. punching rod; 15. positioning cylinder; 16. positioning rod; 17. second positioning hole; 18. first cylinder; 19. second cylinder; 20. annular cavity; 21. oblique hole; 22. first elastic membrane; 23. through hole; 24. second elastic membrane; 25. stopper; 26. steel clamp. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0038] Example 1: Reference Figure 1-9 A steel clip punching die for an aircraft brake disc comprises a lower die base 1 and an upper die base 2. A slider base 5 is mounted on the upper surface of the lower die base 1, a slider 6 is slidably mounted on the slider base 5, the slider 6 is connected to a driving cylinder 8, a stopper 25 corresponding to the slider 6 is fixed on the slider base 5, a punch 3 is mounted on the lower surface of the upper die base 2, and a plurality of punching needles 4 are mounted on the punch 3.

[0039] The slider 6 is provided with a plurality of punching holes 9 corresponding to the punching needles 4, and the slider seat 5 is provided with a plurality of blanking holes 7 corresponding to the punching holes 9, and the blanking holes 7 penetrate the lower die seat 1 downward; a punching cylinder 13 is vertically fixed above the slider seat 5, and a plurality of punching rods 14 are fixedly installed on the end of the output shaft of the punching cylinder 13, and the punching rods 14 are provided corresponding to the blanking holes 7. When punching is performed, the waste material produced by the punching will fall into the punching holes 9. When the punching is completed, the slider 6 is reset, and the punching holes 9 are aligned with the blanking holes 7 on the slider seat 5. At this time, the punching cylinder 13 pushes the punching rod 14 into the punching holes 9 to eject the waste material into the blanking holes 7.

[0040] A plurality of first positioning holes 11 are vertically penetrated on the slider seat 5, and a plurality of second positioning holes 17 are vertically penetrated on the lower die seat 1. The first positioning holes 11 and the second positioning holes 17 are arranged in one-to-one correspondence, and a positioning rod 16 is inserted between every two corresponding first positioning holes 11 and the second positioning holes 17. A positioning cylinder 15 is vertically fixed on the lower die seat 1, and the positioning rods 16 are fixedly connected to the output shaft of the positioning cylinder 15. The slider 6 is provided with third positioning holes 10 arranged in one-to-one correspondence with the plurality of first positioning holes 11.

[0041] A floating positioning pin 12 is also installed on the slider seat 5 in a vertical telescopic manner.

[0042] The present invention also provides a method for punching holes in a steel clip for an aircraft brake disc, and the specific method is as follows:

[0043] S1. Put the steel clip 26 for punching hole 9 into the slider seat 5 on the lower die seat 1. At this time, the floating positioning pin 12 does not play a positioning role and is pressed into the slider seat 5 by the steel clip 26. The cylinder 8 is driven to ventilate, and the slider 6 presses the steel clip 26 onto the stopper 25.

[0044] S2, the positioning cylinder 15 is ventilated, and the two positioning rods 16 move upward and extend into the third positioning holes 10 of the slider 6, locking the slider 6, thereby ensuring the position accuracy of the slider 6;

[0045] S3, start the punch, so that the punch drives the punch needle 4 to punch out four holes on the upper side of the steel clip 26;

[0046] S4, then the positioning cylinder 15 returns to its original position, the driving cylinder 8 returns to its original position, and then the steel clip 26 that has been punched on one side is taken out, and the floating positioning pin 12 is reset and popped out; the punching cylinder 13 is ventilated, and the punching cylinder pushes the punching rod to insert into the punching hole 9 of the slider 6, and the waste material in the punching hole 9 is ejected and falls out of the mold through the blanking hole 7 on the slider seat 5;

[0047] S5. Place the steel clip 26 with four holes punched, with the hole side facing downward. At this time, the two floating positioning pins 12 will penetrate into two of the punched holes of the steel clip 26, playing a positioning role and ensuring the concentricity of the holes on both sides of the steel clip 26;

[0048] S6. Repeat steps S1-S5 until the punching hole 9 of the steel clip 26 is completed.

[0049] Example 2: Reference Figure 10-11 As another preferred embodiment of the present invention, the difference from Embodiment 1 is that an inner cylinder is coaxially fixed in the punching hole 9, and the inner cylinder includes a first cylinder body 18 and a second cylinder body 19, and the first cylinder body 18 is coaxially fixedly connected with the second cylinder body 19, and the first cylinder body 18 is arranged toward the upper die seat 2, and the inner diameter of the first cylinder body 18 is larger than that of the second cylinder body 19. An annular cavity 20 is coaxially opened on the inner wall of the punching hole 9, and the connecting part between the first cylinder body 18 and the second cylinder body 19 is in an inverted cone shape as a whole. An oblique hole 21 is opened along the circumferential direction on the connecting part between the first cylinder body 18 and the second cylinder body 19, and the oblique hole 21 is communicated with the inside of the annular cavity 20, and a first elastic membrane 22 is arranged in each oblique hole 21, and the edge of the first elastic membrane 22 is fixed to the inner wall of the oblique hole 21, so that the first elastic membrane 22 can separate the oblique hole 21. By setting the inner diameter of the first cylinder 18 to be larger than that of the second cylinder 19, and providing an inverted cone-shaped connecting portion between the first cylinder 18 and the second cylinder 19, when punching the hole 9, the debris generated by the punching 9 will diffuse toward the portion between the first cylinder 18 and the second cylinder 19, and under the action of gravity, more of it can fall into the inclined hole 21 provided at the connecting portion, so that the generated metal debris can be better collected.

[0050] The annular cavity 20 is connected to an inflation and deflation module, which is used to inflate or deflate the annular cavity 20 so that the gas in the annular cavity 20 can repeatedly squeeze the first elastic membrane 22 .

[0051] The gas charging and discharging module includes a plurality of through holes 23. The inner wall of the second cylinder 19 is provided with a plurality of through holes 23 along the circumferential direction. The through holes 23 are connected with the annular cavity 20. Each through hole 23 is covered and fixed with a second elastic membrane 24 at one end facing the central axis of the second cylinder 19. The gas charging and discharging module uses the punching rod 14 to extend into the lower part of the inner cylinder, which will produce compression with the second elastic membrane 24, so that the second elastic membrane 24 shrinks, thereby producing compression on the gas in the annular cavity 20, so that the entire gas charging and discharging module does not need to arrange additional pneumatic components, and the structure is simpler and more durable.

[0052] The second elastic membrane 24 is in a semi-spherical shape as a whole. When the second elastic membrane 24 is squeezed by the punching rod 14 , it can be deformed better, thereby squeezing the air in the annular cavity 20 .

[0053] The inner diameter of the oblique hole 21 decreases from outside to inside. The gradually decreasing inner diameter of the oblique hole 21 enables the first elastic membrane 22 to better squeeze the metal debris gathered at the bottom out of the oblique hole 21 during the process of being squeezed outward.

[0054] In the above-mentioned punching process, when the punch needle 4 punches the steel clip 26 and the edge of the waste material coming out of the punching hole 9 is separated from the steel clip 26, a lot of small metal debris will be generated. After falling into the punching hole 9, these metal debris will accumulate on the surface of the slider seat 5 at the bottom of the punching hole 9. Due to their small size, they may enter the tiny gap between the slider 6 and the slider seat 5 during the reset of the slider 6, causing the wear between the slider 6 and the slider seat 5 to increase. For this reason, an inner cylinder is provided. When punching, the metal debris generated by the punching will fall into the inner cylinder. At this time, since the inner diameter of the first cylinder 18 of the inner cylinder is smaller than the inner diameter of the second cylinder 19, at the moment of punching, after the waste material falls, the debris scattered at its annular edge will fall along the first cylinder 18 and the second cylinder 19, and finally fall into the multiple oblique holes 21 opened between the first cylinder 18 and the second cylinder 19, and finally be blocked by the first elastic membrane 22 in the oblique hole 21. Block 6 is reset, and the punching cylinder 13 pushes the punching rod 14 into the punching hole 9. When the waste in the punching hole 9 has been pushed out, the punching rod 14 will be squeezed with the multiple second elastic membranes 24 at the lower part of the second cylinder 19, so that the second elastic membrane 24 will shrink, and the second elastic membrane 24 will squeeze the gas in the annular cavity 20. The gas in the annular cavity 20 will quickly push the first elastic membrane 22 in the oblique hole 21 outward, so that the first elastic membrane 22 will push the metal debris gathered thereon outward, so that the metal debris will spray out of the oblique hole 21. The metal debris sprayed out of the oblique hole 21 will fall into the blanking hole 7 through the second cylinder 19 and the punching rod 14. At this time, the punching rod 14 needs to be slowly retracted to allow the second elastic membrane 24 to expand slowly and the first elastic membrane 22 to shrink slowly, so as to avoid the situation where the first elastic membrane 22 shrinks quickly and sucks the metal debris back, thereby minimizing the amount of debris entering between the slider 6 and the slider seat 5.

[0055] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A steel clip punching die for an aircraft brake disc, comprising a lower die base (1) and an upper die base (2), characterized in that: A slider seat (5) is mounted on the upper surface of the lower die seat (1), a slider (6) is slidably mounted on the slider seat (5), the slider (6) is connected to a driving cylinder (8), a stopper (25) corresponding to the slider (6) is fixed on the slider seat (5), a punch (3) is mounted on the lower surface of the upper die seat (2), and a plurality of punching needles (4) are mounted on the punch (3); The slider (6) is provided with a plurality of punching holes (9) arranged in a one-to-one correspondence with the punching needles (4); the slider seat (5) is provided with a plurality of blanking holes (7) arranged in a one-to-one correspondence with the punching holes (9); and the blanking holes (7) penetrate downwardly through the lower die seat (1); a punching cylinder (13) is vertically fixed above the slider seat (5); a plurality of punching rods (14) are fixedly mounted on the end of the output shaft of the punching cylinder (13); and the punching rods (14) are arranged in a one-to-one correspondence with the blanking holes (7); An inner cylinder is coaxially fixed in the punching hole (9), and the inner cylinder comprises a first cylinder body (18) and a second cylinder body (19). The first cylinder body (18) and the second cylinder body (19) are coaxially fixedly connected. The first cylinder body (18) is arranged toward the upper die seat (2). The inner diameter of the first cylinder body (18) is larger than that of the second cylinder body (19). An annular cavity (20) is coaxially opened on the inner wall of the punching hole (9). The connecting portion between the first cylinder body (18) and the second cylinder body (19) is in the shape of an inverted cone as a whole. A plurality of oblique holes (21) are opened along the circumferential direction on the connecting portion between the first cylinder body (18) and the second cylinder body (19). The oblique holes (21) are connected to the inside of the annular cavity (20). A first elastic membrane (22) is arranged in each of the oblique holes (21). The edge of the first elastic membrane (22) is fixed to the inner wall of the oblique hole (21), so that the first elastic membrane (22) can separate the oblique hole (21). The annular cavity (20) is connected to an inflation and deflation module, and the inflation and deflation module is used to inflate or deflate the annular cavity (20), so that the gas in the annular cavity (20) can repeatedly squeeze the first elastic membrane (22).

2. The steel clip punching die for aircraft brake disc according to claim 1, characterized in that: A plurality of first positioning holes (11) are vertically penetrated on the slider seat (5), and a plurality of second positioning holes (17) are vertically penetrated on the lower die seat (1). The first positioning holes (11) and the second positioning holes (17) are arranged in a one-to-one correspondence, and a positioning rod (16) is inserted between every two corresponding first positioning holes (11) and second positioning holes (17). A positioning cylinder (15) is vertically fixed on the lower die seat (1), and the positioning rod (16) is fixedly connected to the output shaft of the positioning cylinder (15). The slider (6) is provided with third positioning holes (10) arranged in a one-to-one correspondence with the plurality of first positioning holes (11).

3. The steel clip punching die for aircraft brake disc according to claim 1, characterized in that: A floating positioning pin (12) is also mounted on the slider seat (5) in a vertically telescopic manner.

4. The steel clip punching die for aircraft brake disc according to claim 1, characterized in that: The inflation and deflation module comprises a plurality of through holes (23). The inner wall of the second cylinder (19) is provided with a plurality of through holes (23) along the circumferential direction. The through holes (23) are connected to the annular cavity (20). Each of the through holes (23) is covered and fixed with a second elastic membrane (24) at one end facing the central axis of the second cylinder (19).

5. The steel clip punching die for aircraft brake disc according to claim 4, characterized in that: The second elastic membrane (24) is in the shape of a semi-sphere as a whole.

6. The steel clip punching die for aircraft brake disc according to claim 1, characterized in that: The inner diameter of the oblique hole (21) decreases from the outside to the inside.

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