A combined forming device for clutch housing pressing and punching

Abstract

The present invention discloses a clutch housing press forming and punching combined forming device, which belongs to the clutch stamping forming technical field, and comprises an upper concave die and a lower convex die, wherein a guide channel is arranged in the upper concave die, and a punching knife group is installed in the guide channel; the punching knife group comprises a connecting seat, a punching knife head and an outer sleeve, and a pre-punching knife head is installed at the bottom end of the outer sleeve; the outer sleeve and the punching knife head are switched back and forth between a movable connection and a rigid connection through a rigid locking mechanism, in the first stage, in a rigid connection state, the pre-punching knife head pre-punches a workpiece, in the second stage, it switches to a movable connection state, the punching knife head pushes the flip punch to flip away from the pre-punching position, and in the third stage, the movable connection state is maintained, and the punching knife head punches the pre-punching position. The present invention arranges the punching knife group in the upper concave die, and can punch directly without moving the workstation or the workpiece after press forming, thereby greatly improving the processing efficiency of the clutch housing.

Description

Technical Field

[0001] The invention relates to the technical field of clutch stamping and forming, and in particular to a clutch housing pressing and punching combined forming device. Background Art

[0002] The main function of the clutch is to cut off and combine the power transmission between two moving parts. The clutch housing is usually made of materials such as aluminum alloy or cast iron. These materials have the characteristics of light weight, high strength, and corrosion resistance, and are suitable for processing by stamping. Through stamping, the shape and size of the clutch housing can be precisely controlled while ensuring the mechanical properties and surface quality of the material.

[0003] The traditional stamping forming process can only complete the forming of the clutch housing shape, but a complete and usable clutch housing not only needs to have a suitable shape structure, but also needs to have assembly holes and connection holes on the surface. Therefore, stamping alone can only complete the preliminary forming of the clutch housing, and it is impossible to complete the processing of the clutch housing in one go. Although the existing mold technology has been widely used, composite molds have appeared that can cope with the two processes of stamping and punching on one mold, but this composite mold needs to move the workpiece or workstation to switch the processing method during operation, which is not only inefficient, but also easily leads to punching position deviation during the movement process, resulting in defective products. In addition, since the clutch housing is a high-strength material, the quality requirements of the cutter head are high when punching, otherwise the punching cannot be smooth. Long-term punching will also aggravate the loss of the cutter head and increase the cost of use. Summary of the invention

[0004] The present invention aims to solve the problems that the clutch housing forming process is prone to errors, low efficiency and large tool head wear, and to provide a combined forming device for clutch housing pressing and punching. The device has the advantages of high work efficiency, increased pre-punching and reduced tool head wear.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A clutch housing press forming and punching combined forming device, comprising an upper die and a lower punch mounted on a frame, wherein the upper die is provided with a plurality of guide channels, wherein a punching knife group is installed in the guide channels, and wherein the punching knife group is used to punch holes after the upper die and the lower punch have completed press forming of the workpiece;

[0007] The punching knife assembly includes a connection seat connected to the punching cylinder, a punching cutter head is fixedly installed at the bottom end of the connection seat, an outer sleeve is movably sleeved outside the punching cutter head, the top end of the outer sleeve is elastically connected to the connection seat through a tension spring, a pre-punching cutter head is installed at the bottom end of the outer sleeve, and the pre-punching cutter head includes a flip punch, and the flip punch is used to flip and push the outer sleeve back to move toward the connection seat after receiving the thrust of the punching cutter head;

[0008] The outer sleeve and the punching head are switched back and forth between an active connection and a rigid connection through a rigid locking mechanism. In the first stage, the rigid locking mechanism is in a rigid connection state, and the punching cylinder drives the connecting seat to move downward to drive the pre-punching head to pre-punch the workpiece. In the second stage, the rigid locking mechanism switches to an active connection state, and the connecting seat continues to move downward to drive the punching head to push the flip punch to flip away from the pre-punching position. In the third stage, the rigid locking mechanism maintains an active connection state, and the connecting seat continues to move downward to drive the punching head to punch the pre-punching position.

[0009] Preferably, the rigid locking mechanism includes a locking bolt passing through the outer sleeve, and a reset spring is installed between the locking bolt and the outer sleeve. The rigid locking mechanism also includes a locking card hole opened on the side wall of the punching cutter head, which is used to put the rigid locking mechanism in a rigid connection state when the locking bolt is inserted into the locking card hole under thrust, and the rigid locking mechanism switches to an active connection state after the locking bolt retracts and leaves the locking card hole.

[0010] Preferably, a push seat is installed on the inner wall of the guide channel, and the push seat includes a top surface section and slope sections on both sides. The distance between the top surface section and the locking hole is the shortest, and a spherical bolt seat is installed at the end of the locking bolt away from the locking hole. As the locking bolt moves downward with the outer sleeve, the spherical bolt seat moves along the slope section to the top surface section, pushing the locking bolt into the locking hole.

[0011] Preferably, a slide groove is provided on the inner wall of the guide channel, and the propulsion seat is installed in the slide groove and can slide up and down.

[0012] Preferably, the upper and lower hole distances of the locking card hole are larger than the diameter of the locking bolt.

[0013] Preferably, the pre-punching tool head is also equipped with a limit baffle in contact with the flip punch, which is used for the punching tool head to push the limit baffle to drive the flip punch to flip. The bottom end of the flip punch is an arc-shaped protrusion, and the pre-punching is achieved by indenting the surface of the workpiece with the arc-shaped protrusion.

[0014] Preferably, the flip punch is installed at the bottom of the outer sleeve through a torsion spring shaft, and the limit baffle is installed on the limit seat, which is used to limit the thrust of the flip punch on the limit baffle and maintain the limit baffle inclined toward the punching tool head.

[0015] Preferably, the pre-punching cutter heads are provided in plurality and are distributed in a ring shape at the bottom of the outer sleeve.

[0016] Preferably, the top of the upper die is connected to a profiling push rod, the profiling push rod is connected to a profiling cylinder, the profiling cylinder is mounted on a frame, the punching cylinder is mounted on the profiling push rod, the punching cylinder is connected to a connecting seat through the punching push rod, and a guide column is connected between the upper die and the lower punch.

[0017] Preferably, the lower punch is composed of a plurality of support modules, and the upper and lower support modules are connected by elastic columns. As the upper die squeezes the support modules, they are successively lowered to form a protruding model matching the upper die.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. By setting the punching knife group in the upper die, punching can be performed directly after pressing without moving the workstation or workpiece, which greatly improves the processing efficiency of the clutch housing. In the punching process, the pre-punching knife head is used to pre-punch the position to be punched first, and then the pre-punching position is punched. In this way, the punching difficulty is reduced by pre-punching, and the loss of the knife head can also be reduced.

[0020] 2. The pre-punching and punching in the present invention are both realized within one stroke of the punching cylinder. The rigid locking mechanism is utilized to enable the punching head and the pre-punching head to switch back and forth between a rigid connection state and a movable connection state, thereby realizing pre-punching in a rigid connection state, retreating the pre-punching head in a movable connection state, and punching the punching head. This mode of realizing both pre-punching and punching in one stroke saves space and reduces the operating steps, thereby improving the punching efficiency while protecting the punching head. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the combined molding device of the present invention.

[0022] Figure 2 It is a schematic diagram of the structure of the lower punch of the present invention.

[0023] Figure 3 It is a schematic diagram of the structure of the punching knife group of the present invention.

[0024] Figure 4 It is a schematic diagram of the rigid locking structure of the present invention.

[0025] Figure 5 It is a schematic diagram of the installation structure of the pre-punching cutter head of the present invention.

[0026] Figure 6It is a schematic diagram of the indentation formed on the surface of the workpiece by the pre-punching of the present invention.

[0027] Figure 7 This is a state diagram of the punching knife group when the pre-punching knife head of the present invention is performing pre-punching.

[0028] Figure 8 It is a state diagram of the propulsion seat after the rigid locking mechanism of the present invention leaves the rigid connection state.

[0029] Fig. 9 This is a state diagram of the punching knife group when the punching knife head of the present invention is punching.

[0030] Fig.10 This is a diagram of the reset state of the flip punch after the punching of the present invention is completed.

[0031] Fig.11 This is a state diagram of the punching knife assembly when the punching knife head of the present invention is raised with the outer sleeve.

[0032] In the figure: 1. frame, 2. upper die, 3. lower punch, 4. guide column, 5. profiling cylinder, 6. profiling push rod, 7. punching cylinder, 8. punching push rod, 9. punching knife group, 10. guide channel, 11. support module, 12. elastic column, 13. connecting seat, 14. punching knife head, 15. outer sleeve, 16. pre-punching knife head, 17. rigid locking mechanism, 18. tension spring, 19. locking bolt, 20. locking card hole, 21. reset spring, 22. spherical bolt seat, 23. slide groove, 24. push seat, 25. flip punch, 26. torsion spring shaft, 27. limit baffle, 28. limit seat. DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0034] like Figure 1As shown, a clutch housing press forming and punching combined forming device is disclosed, comprising an upper die 2 and a lower punch 3 mounted on a frame 1, a plurality of guide channels 10 are arranged in the upper die 2, a punching knife group 9 is installed in the guide channel 10, and the punching knife group 9 is used to punch holes after the upper die 2 and the lower punch 3 have completed the press forming of the workpiece. The device includes two processing techniques of press forming and punching. The plate for processing the clutch housing is first placed between the upper die 2 and the lower punch 3. As the upper die 2 and the lower punch 3 approach each other, the plate is pressed into a workpiece with the appearance of the clutch housing. After the press forming is completed, the workpiece and the mold do not need to be moved, and the punching knife group 9 in the guide channel 10 can be used to punch the workpiece. Since the guide channel 10 is added together when the upper die 2 is designed and assembled, its left and right positions will not change, so the position of each punching will not change. In the mass production process of the clutch housing, there will be no punching deviation, which greatly improves the product yield.

[0035] The top of the upper die 2 is connected to the profiling push rod 6, which is connected to the profiling cylinder 5. The profiling cylinder 5 is mounted on the frame 1, and the punching cylinder 7 is mounted on the profiling push rod 6. The punching cylinder 7 is connected to the connecting seat 13 through the punching push rod 8. The guide column 4 is connected between the upper die 2 and the lower punch 3. The upper die 2 is powered by the profiling cylinder 5 to squeeze the lower punch 3. The punching knife group 9 uses the punching cylinder 7 to realize its punching processing on the workpiece. In order to reduce the stroke length of the punching cylinder 7, the punching cylinder 7 is installed on the profiling push rod 6. As the profiling push rod 6 moves downward, the punching cylinder 7 moves downward synchronously with the upper die 2. In this way, the punching knife group 9 is always in a fixed position in the guide channel 10 before punching. The subsequent punching operation only needs a shorter stroke to complete the punching process. The short stroke movement is more stable and reliable. When the upper die 2 and the lower punch 3 move relative to each other, the guide column 4 can also be used to provide stability.

[0036] like Figure 2As shown, the lower punch 3 is composed of a plurality of support modules 11, and the upper and lower parts of the support modules 11 are connected by elastic columns 12. As the upper die 2 squeezes the support modules 11, they are successively lowered to form a protruding model matching the upper die 2. Here, the lower punch 3 is designed as a non-integrated structure, but is composed of a plurality of support modules 11, and the composition shape matches the upper die 2. The support modules 11 are connected by elastic columns 12 at the upper and lower parts, so that there is a reset action after the lowering is completed. During the press forming process, the top of the support module 11 is a plane. Since the support module 11 located in the middle position is long, pressure is applied to the workpiece first. After the press forming of the middle part is completed, it is the turn of the support modules 11 on both sides that can be lowered to apply pressure. Compared with the one-time press forming, this step-by-step press forming method has hierarchical deformation of the workpiece, and is not easy to damage the mechanical properties of the workpiece compared with the one-time forming method. Moreover, the reset of the elastic columns 12 can restore the tops of each support module 11 to the same horizontal plane, so that the support module 11 can be demolded from the workpiece.

[0037] The above describes in detail the operation of pressing the workpiece. After pressing, punching is required. Figure 3 As shown, the structure of the punching knife group 9 is described in detail. The punching knife group 9 includes a connecting seat 13 connected to the punching cylinder 7. A punching cutter head 14 is fixedly installed at the bottom end of the connecting seat 13. The outer movable sleeve of the punching cutter head 14 is provided with an outer sleeve 15. The top end of the outer sleeve 15 is elastically connected to the connecting seat 13 by a tension spring 18. A pre-punching cutter head 16 is installed at the bottom end of the outer sleeve 15. The pre-punching cutter head 16 includes a flip punch 25. The flip punch 25 is used to flip and push the outer sleeve 15 back to move toward the connecting seat 13 after receiving the thrust of the punching cutter head 14. The punching knife group 9 includes not only the punching cutter head 14 but also the pre-punching cutter head 16. In this way, the workpiece is pre-punched before punching. Compared with the direct punching of the punching cutter head 14, the wear of the cutter head is reduced. According to Figure 3It can be seen that the punching cutter head 14 is located inside the outer sleeve 15, and the pre-punching cutter head 16 is located at the bottom end of the outer sleeve 15, so that the position of the punching cutter head 14 is higher than the pre-punching cutter head 16, so the pre-punching cutter head 16 contacts the workpiece first, and the punching cutter head 14 contacts the workpiece later, thereby realizing the action of pre-punching first and then punching. In order to ensure that the indentation of the pre-punching hole is consistent with the aperture of the final punching hole, the pre-punching cutter head 16 will inevitably hinder the downward movement of the punching cutter head 14, so the pre-punching cutter head 16 is designed to adopt a structure of a flip punch 25, which has The flipping function can flip over to cancel the obstruction of the punching head 14 after the pre-punching is completed. The punching head 14 is fixedly connected to the connecting seat 13, so when the connecting seat 13 moves downward, the punching head 14 always moves downward, and the pre-punching head 16 is installed on the outer sleeve 15, and the outer sleeve 15 is movably connected to the connecting seat 13, so the pre-punching head 16 will not move downward all the time, but only move downward during pre-punching. After the pre-punching is completed, even if the connecting seat 13 continues to move downward to make the punching head 14 punch, the pre-punching head 16 will not continue to move downward.

[0038] In order to achieve the above-mentioned pre-punching cutter head 16, which can only be driven downward by the connecting seat 13 when pre-punching, and is in an active state at the rest of the time, the outer sleeve 15 and the punching cutter head 14 are switched back and forth between active connection and rigid connection through a rigid locking mechanism 17. In the first stage, the rigid locking mechanism 17 is in a rigid connection state, and the punching cylinder 7 drives the connecting seat 13 to move downward and drive the pre-punching cutter head 16 to pre-punch the workpiece. In the second stage, the rigid locking mechanism 17 switches to an active connection state, and the connecting seat 13 continues to move downward to drive the punching cutter head 14 to push the flip punch 25 to flip and leave the pre-punching position. In the third stage, the rigid locking mechanism 17 maintains an active connection state, and the connecting seat 13 continues to move downward to drive the punching cutter head 14 to punch the pre-punching position. The rigid locking mechanism 17 can realize two connection modes between the outer sleeve 15 and the punching cutter head 14, one is rigid, in which the outer sleeve 15 follows the movement of the connecting seat 13 and the punching cutter head 14, and the other is movable, in which the outer sleeve 15 is separated from the punching cutter head 14 and the movement of the connecting seat 13 and the punching cutter head 14. Due to the two states of the rigid locking mechanism 17, the pre-punching and punching processes are divided into three stages. The first stage belongs to the pre-punching stage. In this stage, the rigid locking mechanism 17 becomes rigid, so that the connecting seat 13 moves downward to drive the punching cutter head 14 and The outer sleeve 15 moves down together until the pre-punching head 16 completes the pre-punching of the workpiece, and enters the second stage. The rigid locking mechanism 17 becomes active. At this time, the connection between the outer sleeve 15 and the punching head 14 is unlocked, and the downward pressure disappears. The punching head 14 needs to continue to move down to approach the workpiece. During this process, the flip punch 25 of the pre-punching head 16 is pushed to flip. Since the downward pressure of the pre-punching head 16 disappears, the flip punch 25 is easy to flip and leave the pre-punching position. Finally, the third stage is entered. The punching head 14 continues to move down. Without the obstruction of the pre-punching head 16, the workpiece is punched smoothly. The connection seat 13 is continuously downward in the three stages, so it only needs to complete the pre-punching and punching operations within one stroke of the punching cylinder 7, saving operation steps and improving work efficiency.

[0039] like Figure 4 As shown, the rigid locking mechanism 17 includes a locking bolt 19 that penetrates the outer sleeve 15, and a reset spring 21 is installed between the locking bolt 19 and the outer sleeve 15. The rigid locking mechanism 17 also includes a locking card hole 20 opened on the side wall of the punching cutter head 14, which is used to put the rigid locking mechanism 17 in a rigid connection state when the locking bolt 19 is pushed into the locking card hole 20, and the rigid locking mechanism 17 switches to a movable connection state after the locking bolt 19 retreats to leave the locking card hole 20. The rigid locking mechanism 17 uses the plug-in connection between the locking bolt 19 and the locking card hole 20 to achieve locking and unlocking operations, and the reset spring 21 is used to facilitate the locking bolt 19 to pop out of the locking card hole 20.

[0040] The above discloses how the rigid locking mechanism 17 rigidly or flexibly connects the outer sleeve 15 and the punching cutter head 14 through the locking bolt 19, and the locking bolt 19 can be driven manually or mechanically. The manual method is not described in detail, and the mechanical method is now described in detail. Figure 4 As shown, a push seat 24 is installed on the inner wall of the guide channel 10, and the push seat 24 includes a top surface section and inclined sections on both sides. The distance between the top surface section and the locking card hole 20 is the shortest, and a spherical bolt seat 22 is installed at the end of the locking bolt 19 away from the locking card hole 20. As the locking bolt 19 moves downward as the outer sleeve 15 moves, the spherical bolt seat 22 moves along the inclined section to the top surface section, pushing the locking bolt 19 to insert into the locking card hole 20. According to the movement principle of the outer sleeve 15 mentioned above, it can be known that the outer sleeve 15 will move up and down, so the locking bolt 19 also moves with it. Therefore, the design of the push seat 24 can allow the locking bolt 19 to move downward, along the inclined section of the push seat 24 to reach the top surface section, and finally leave the push seat 24 from another inclined section. During these three movement processes, the locking bolt 19 is first slowly inserted into the locking card hole 20, and then leaves the locking card hole 20. The spherical bolt seat 22 is for the convenience of sliding the locking bolt 19 on the push seat 24.

[0041] A slide groove 23 is set on the inner wall of the guide channel 10, and the push seat 24 is installed in the slide groove 23 and can slide up and down. Since the moving distance of the outer sleeve 15 in the rigid connection state is the pre-punching depth, the outer sleeve 15 needs to be unlocked immediately after moving a short distance, otherwise the punching head 14 will not have enough distance to move. Therefore, the push seat 24 is set to be able to slide up and down. During pre-punching, the push seat 24 is at the bottom of the slide groove 23. After the locking bolt 19 leaves the top surface section, the reverse thrust can make the push seat 24 move up. In this way, the outer sleeve 15 does not need to continue to move downward during the unlocking process, and the subsequent retraction operation of the outer sleeve 15 can continue to use the locking bolt 19 to lift the push seat 24 to provide sufficient activity space.

[0042] The upper and lower hole distances of the locking card hole 20 are larger than the diameter of the locking bolt 19. Since the outer sleeve 15 is connected to the connecting seat 13 by means of a tension spring 18, the upper and lower hole distances are large. Even if the outer sleeve 15 and the punching head 14 are slightly offset, the locking bolt 19 can be smoothly inserted into the locking card hole 20.

[0043] like Figure 5As shown, the pre-punching tool head 16 is also equipped with a limit baffle 27 that contacts the flip punch 25, which is used for the punching tool head 14 to push the limit baffle 27 to drive the flip punch 25 to flip. The bottom end of the flip punch 25 is an arc-shaped protrusion, and the arc-shaped protrusion is used to indent the surface of the workpiece to achieve pre-punching. The limit baffle 27 directly contacts the punching tool head 14 instead of the flip punch 25, and the rotation generated by the limit baffle 27 is used to push the flip punch 25 to flip, which can avoid the punching tool head 14 from damaging the flip punch 25. The flip punch 25 is installed at the bottom of the outer sleeve 15 through the torsion spring shaft 26, and the limit baffle 27 is installed on the limit seat 28. The limit seat 28 is used to limit the thrust of the flip punch 25 on the limit baffle 27 and maintain the limit baffle 27 tilted toward the punching tool head 14. The torsion spring shaft 26 facilitates the recovery of the flip punch 25 after flipping, and the limiting seat 28 of the limiting baffle 27 limits the tilting angle of the limiting baffle 27, so that the flip punch 25 can always keep the arc-shaped protrusion vertically downward.

[0044] Since the arc-shaped protrusion can produce an indentation on the workpiece, a plurality of pre-punching tool heads 16 are provided in a ring-shaped distribution at the bottom of the outer sleeve 15. The pre-punching tool heads 16 distributed in a ring-shaped distribution can be used to achieve the following Figure 6 The indentation shown in the figure presses a trace consisting of a circular hole on the complete plane of the workpiece. At this time, the punching head 14 can easily punch out a circular hole along the circular trace. Of course, the circularly distributed pre-punching head 16 is suitable for punching circular holes. Punching holes of other shapes also requires targeted design of the position of the pre-punching head 16.

[0045] Now, the process of pre-punching and punching is described in detail in combination with the rigid locking mechanism 17 and the pre-punching cutter head 16:

[0046] In the initial state, the punching knife group 9 is as follows Figure 3 As shown, the push seat 24 is at the bottom of the slide slot 23, the locking bolt 19 is above the push seat 24, the tension spring 18 is in a slightly stretched state, and the outer sleeve 15 uses the tension of the tension spring 18 to maintain the connection with the connecting seat 13. When pre-punching, the connecting seat 13 pushes the punching head 14 down, and the outer sleeve 15 also descends, and the pre-punching head 16 at the bottom contacts the workpiece first.

[0047] like Figure 7 As shown, as the connecting seat 13 continues to move downward, the tension spring 18 is slightly compressed, pushing the outer sleeve 15 downward, and the locking bolt 19 enters the top surface section at the upper slope section of the push seat 24 and is inserted into the locking card hole 20. At this time, the outer sleeve 15 is rigidly connected to the punching head 14, and the pre-punching head 16 completes the pre-punching from contacting with the workpiece to being pressed into the workpiece, and the locking bolt 19 moves to the critical point between the top surface section and the lower slope section of the push seat 24.

[0048] After breaking the critical point, Figure 8As shown, the connecting seat 13 moves downward, and the locking bolt 19 pushes the propulsion seat 24 upward in the slide groove 23 through the lower slope section. Due to the action of the return spring 21, the locking bolt 19 withdraws from the locking card hole 20, the rigid state is broken, and the outer sleeve 15 is separated from the punching head 14.

[0049] like Fig. 9 As shown, under the action of the movement of the connecting seat 13, the punching head 14 pushes the flip punch 15 to flip, making way for the punching head 14 to contact the workpiece, and during the flipping process of the flip punch 15, the outer sleeve 15 will be supported upward for a small distance, and the tension spring 18 is in a compressed state.

[0050] After the punching is completed, Fig.10 As shown, the connecting seat 13 pulls the punching head 14 upward, the thrust of the flip punch 15 disappears, and with the action of the torsion spring shaft 26, it returns to the state where it can be pre-punched, that is, the arc-shaped protrusion is vertically downward, and the tension spring 18 also returns to its natural state.

[0051] The connecting seat 13 continues to move upward. Fig.11 As shown, since the outer sleeve 15 and the punching cutter head 14 are still in an active connection state, the connecting seat 13 drives the punching cutter head 14 to move upward, and the outer sleeve 15 is also driven by the tension of the tension spring 18 to move upward until the locking bolt 19 pushes the propulsion seat 24 to the top of the slide groove 23, and the locking bolt 19 moves along the lower slope section to the top surface section. The locking bolt 19 is reinserted into the locking card hole 20, and the connecting seat 13 continues to move upward, which can move the outer sleeve 15 upward, so that the locking bolt 19 leaves the propulsion seat 24, and finally the propulsion seat 24 falls back to the lowest position of the slide groove 23 due to gravity, and the outer sleeve 15 and the punching cutter head 14 are restored to the active connection state, and the entire punching knife group 9 is restored to Figure 3 The initial state of the hole has completed a pre-punching-punching operation.

[0052] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0053] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A clutch housing press forming and punching combined forming device, comprising an upper concave die (2) and a lower convex die (3) mounted on a frame (1), characterized in that: A plurality of guide channels (10) are arranged in the upper die (2), a punching knife group (9) is installed in the guide channel (10), and the punching knife group (9) is used to punch holes after the upper die (2) and the lower punch (3) have completed the pressing of the workpiece; The punching knife assembly (9) comprises a connecting seat (13) connected to the punching cylinder (7), a punching knife head (14) is fixedly mounted on the bottom end of the connecting seat (13), an outer sleeve (15) is movably mounted outside the punching knife head (14), the top end of the outer sleeve (15) is elastically connected to the connecting seat (13) via a tension spring (18), a pre-punching knife head (16) is mounted on the bottom end of the outer sleeve (15), the pre-punching knife head (16) comprises a flip punch (25), and the flip punch (25) is used to flip and push the outer sleeve (15) back to move toward the connecting seat (13) after receiving a thrust from the punching knife head (14); The outer sleeve (15) and the punching cutter head (14) are switched back and forth between an active connection and a rigid connection via a rigid locking mechanism (17). In the first stage, the rigid locking mechanism (17) is in a rigid connection state, and the punching cylinder (7) drives the connecting seat (13) to move downward to drive the pre-punching cutter head (16) to pre-punch a hole in the workpiece. In the second stage, the rigid locking mechanism (17) switches to an active connection state, and the connecting seat (13) continues to move downward to drive the punching cutter head (14) to push the flip punch (25) to flip and leave the pre-punching position. In the third stage, the rigid locking mechanism (17) maintains an active connection state, and the connecting seat (13) continues to move downward to drive the punching cutter head (14) to punch the pre-punching position.

2. A clutch housing pressing and punching combined forming device according to claim 1, characterized in that: The rigid locking mechanism (17) comprises a locking bolt (19) penetrating the outer sleeve (15), a return spring (21) being installed between the locking bolt (19) and the outer sleeve (15), and the rigid locking mechanism (17) further comprises a locking clamping hole (20) provided on the side wall of the punching cutter head (14), for placing the rigid locking mechanism (17) in a rigid connection state when the locking bolt (19) is inserted into the locking clamping hole (20) under a thrust force, and switching the rigid locking mechanism (17) to a movable connection state after the locking bolt (19) retracts to leave the locking clamping hole (20).

3. A clutch housing pressing and punching combined forming device according to claim 2, characterized in that: The inner wall of the guide channel (10) is provided with a push seat (24), the push seat (24) comprising a top surface section and slope sections on both sides, the top surface section being at the shortest distance from the locking hole (20), a spherical bolt seat (22) being provided at one end of the locking bolt (19) away from the locking hole (20), and as the locking bolt (19) moves downward along the outer sleeve (15), the spherical bolt seat (22) moves along the slope section to the top surface section, pushing the locking bolt (19) into the locking hole (20).

4. A clutch housing pressing and punching combined forming device according to claim 3, characterized in that: The inner wall of the guide channel (10) is provided with a slide groove (23), and the propulsion seat (24) is installed in the slide groove (23) and can slide up and down.

5. A clutch housing pressing and punching combined forming device according to claim 3, characterized in that: The upper and lower hole distances of the locking clamp hole (20) are greater than the diameter of the locking bolt (19).

6. A clutch housing pressing and punching combined forming device according to claim 1, characterized in that: The pre-punching tool head (16) is also provided with a limit baffle (27) in contact with the flip punch (25), and is used for the punching tool head (14) to push the limit baffle (27) to drive the flip punch (25) to flip, and the bottom end of the flip punch (25) is an arc-shaped protrusion, and the arc-shaped protrusion is used to indent the surface of the workpiece to achieve pre-punching.

7. A clutch housing pressing and punching combined forming device according to claim 6, characterized in that: The flip punch (25) is mounted on the bottom of the outer sleeve (15) via a torsion spring shaft (26), and the limit baffle (27) is mounted on a limit seat (28). The limit seat (28) is used to limit the thrust of the flip punch (25) on the limit baffle (27) and maintain the limit baffle (27) tilted toward the punching head (14).

8. A clutch housing pressing and punching combined forming device according to claim 1 or 7, characterized in that: The pre-punching cutter heads (16) are provided with a plurality of pre-punching cutter heads (16) distributed in a ring shape at the bottom of the outer sleeve (15).

9. A clutch housing pressing and punching combined forming device according to claim 1, characterized in that: The top of the upper concave die (2) is connected to a profiling push rod (6), the profiling push rod (6) is connected to a profiling cylinder (5), the profiling cylinder (5) is mounted on the frame (1), the punching cylinder (7) is mounted on the profiling push rod (6), the punching cylinder (7) is connected to a connecting seat (13) via the punching push rod (8), and a guide column (4) is connected between the upper concave die (2) and the lower punch die (3).

10. A clutch housing pressing and punching combined forming device according to claim 1 or 9, characterized in that: The lower punch (3) is composed of a plurality of support modules (11), wherein the upper and lower support modules (11) are connected via elastic columns (12), and as the upper die (2) squeezes the support modules (11), they are successively lowered to form a protruding model that matches the upper die (2).

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