Stamping die and method facilitating punch replacement

Abstract

The stamping die comprises a die body and the punch, a mounting groove is formed in the die body, one end of the punch is inserted into the mounting groove in a matched mode, a fixing groove is formed in the inner side wall of the mounting groove, and a sleeve penetrating through the punch to be inserted into the fixing groove in a matched mode is arranged on the die body; a limiting piece is arranged on the sleeve, a rotating shaft is arranged in the sleeve in a limiting mode, a rotating shaft groove is formed in the side wall of the rotating shaft, a sliding block is arranged in the rotating shaft groove in a matched and sliding mode, a spring is arranged between the sliding block and the groove bottom of the rotating shaft groove, and a through hole is formed in the side wall of the sleeve. The punching head is provided with the hole shrinkage mechanism for reducing the hole diameter of the punching head through hole, the sliding block extends into the sliding block groove by rotating the rotating shaft, so that fixing of the punching head is completed, or the sliding block retracts into the rotating shaft groove from the via hole, the sliding block is separated from the sliding block groove, the punching head in the mounting groove is pulled out, disassembling of the punching head is completed, and the punching head is more convenient to replace.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of stamping die, more particularly to a stamping die and method facilitating replacement of punch. BACKGROUND

[0002] Stamping is a forming process that uses presses and dies to shape sheet, strip, tube, and profile by applying force to make plastic deformation or separation, so as to obtain the required shape and size of the workpiece (stamping parts). The body of the automobile, chassis, oil tank, radiator sheet, boiler drum, container shell, motor, electric iron core silicon steel sheet, etc. are all stamped. There are also a large number of stamping parts in instruments and meters, household appliances, bicycles, office machinery, and household utensils. Stamping is a production technology that uses the power of conventional or special stamping equipment to make sheet metal directly deform in the die to obtain a product part with a certain shape, size, and performance. Sheet metal, die, and equipment are the three elements of stamping. The punch is used for various shapes during stamping. When the punch is damaged or the specification of the product needs to be replaced, the punch needs to be replaced.

[0003] However, the existing punch mounting structure of the stamping die has certain disadvantages. The punch is fixedly connected with the die plate by screws. When installing and disassembling, the die plate needs to be disassembled to expose the screws connecting the punch and the stamping die, which is not convenient for the installation and disassembly of the punch, resulting in difficulty in replacing the punch. SUMMARY

[0004] In view of the above defects of the prior art, a stamping die facilitating replacement of punch is provided.

[0005] The technical scheme adopted by the present application to solve its technical problems is: a stamping die facilitating replacement of punch, comprising a die body and a punch, wherein the die body is provided with a mounting groove, one end of the punch is matched and inserted into the mounting groove, the inner side wall of the mounting groove is provided with a fixing groove, the die body is provided with a sleeve passing through the punch and matched and inserted into the fixing groove, the punch is provided with a punch through hole through which the sleeve passes, the sleeve is provided with a limiting member limiting rotation of the sleeve, a rotating shaft is limitingly arranged in the sleeve and rotates, the side wall of the rotating shaft is provided with a rotating shaft groove, a sliding block is matched and slidably arranged in the rotating shaft groove, the sliding block is a quadrangular prism with a straight trapezoidal bottom surface, the upper bottom edge of the bottom surface of the sliding block is located outside the sleeve, a spring is arranged between the sliding block and the groove bottom of the rotating shaft groove, the side wall of the sleeve is provided with a through hole through which the sliding block passes, the die body is provided with a sliding block groove in the inner wall of the fixing groove, the top surface of the sliding block abuts against the inner top surface of the sliding block groove, and the punch is provided with a hole reducing mechanism reducing the hole diameter of the punch through hole.

[0006] As preferred, the mold body is provided with a mold through hole, the mold through hole, the punch through hole and the mounting groove are concentric with each other, the sleeve sequentially passes through the mold through hole, the punch through hole and the mounting groove, the mold body is provided with a limiting groove on the inner side wall of the mold through hole, one end of the limiting groove is an opening structure connected to the outside, and the limiting member is arranged on the outer side wall of the sleeve and is matched and inserted into the limiting groove from the opening.

[0007] As preferred, the hole shrinking mechanism comprises two clamping blocks, the punch is provided with two opposite punching grooves on the inner side wall of the punch through hole, the two clamping blocks slide in the corresponding punching grooves, the punch is provided with a cavity, the cavity is provided with a rotating bidirectional screw rod, one end of the two clamping blocks extends an extension part corresponding to the threads at both ends of the bidirectional screw rod, the bidirectional screw rod is provided with a worm gear, the cavity is rotatably provided with a worm gear meshing with the worm gear, one end of the worm gear is provided with an auxiliary member for assisting the rotation of the worm gear, and the punch is provided with an exposure through hole exposing the auxiliary member.

[0008] As preferred, the shaft is provided with an auxiliary member for assisting the rotation of the shaft at one end away from the mounting groove, the auxiliary member is located outside the mold body, the side wall of the shaft is provided with an annular limiting groove, and the inner side wall of the sleeve is provided with a protrusion matched and sliding in the limiting groove.

[0009] As preferred, the auxiliary member is a semicircular ring structure, the auxiliary member is hinged on the shaft, and the shaft is provided with a receiving groove receiving the auxiliary member.

[0010] As preferred, the shaft is provided with a limiting sliding groove on one side wall of the shaft groove, the limiting sliding groove extends in the sliding direction of the sliding block, and the sliding block is provided with a limiting block sliding in the limiting sliding groove.

[0011] As preferred, the mold body comprises an upper mold and a lower mold, the upper mold is provided with a mounting block for mounting the punch, and the mounting groove is arranged on the mounting block.

[0012] As preferred, the punch comprises a connecting part and a forming part, the connecting part and the forming part are detachably connected, the connecting part is matched and inserted into the mounting groove, and the sleeve passes through the connecting part.

[0013] As preferred, the sliding block groove is an annular structure surrounding the inner wall of the fixed groove.

[0014] A method for conveniently replacing a punch, comprising the following steps:

[0015] S1, rotate the rotating shaft in the forward direction, the rotating shaft rotates relative to the sleeve, the sliding block slides out of the sliding block groove and slides into the rotating shaft groove under the action of the four-prism inclined surface, the inner side wall of the sleeve prevents the sliding block from sliding into the sliding block groove;

[0016] S2, pull the rotating shaft and the sleeve out of the fixed groove and the punch to be replaced, and then pull the punch to be replaced out of the installation groove;

[0017] S3, insert the new punch into the installation groove, and then pass the rotating shaft and the sleeve through the punch and insert them into the fixed groove;

[0018] S4, rotate the rotating shaft in the reverse direction, the rotating shaft rotates relative to the sleeve, the sliding block slides into the sliding block groove from the through hole under the action of the spring, thereby fixing the new punch and completing the replacement of the punch.

[0019] S5, after the sleeve and the punch hole are loosened, the sleeve and the punch hole are re-adapted through the hole shrinking mechanism.

[0020] The beneficial effects of the present application are that the rotating shaft and the sleeve pass through the punch and are inserted into the installation groove, the sliding block is extended into the sliding block groove through the through hole of the sleeve by rotating the rotating shaft, thereby fixing the punch, or the sliding block is retracted into the rotating shaft groove from the through hole, thereby making the sliding block disengage from the sliding block groove and pulling out the punch in the installation groove, thereby completing the disassembly of the punch, the punch can be replaced without disassembling the die plate of the stamping die, the replacement of the punch is more convenient, and after the sleeve and the punch hole are loosened, the sleeve and the punch hole are re-adapted through the hole shrinking mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present application;

[0022] Figure 2 is a schematic diagram of the overall structure of an embodiment of the present application Figure 1 is a schematic diagram of the overall structure of an embodiment of the present application

[0023] Figure 3 is a schematic diagram of the overall structure of an embodiment of the present application Figure 2 is a schematic diagram of the overall structure of an embodiment of the present application

[0024] Figure 4 is a schematic diagram of the overall structure of an embodiment of the present application

[0025] Figure 5 is a schematic diagram of the overall structure of an embodiment of the present application

[0026] Reference signs: 1 upper die, 2 mounting block, 20 mounting groove, 21 fixing groove, 22 sliding block groove, 23 die through hole, 24 body through hole, 3 lower die, 4 punch, 40 connecting part, 400 punching groove, 401 cavity, 402 exposed through hole, 41 forming part, 42 punch through hole, 43 clamping block, 44 extension, 45 bidirectional screw rod, 46 worm wheel, 47 worm, 48 auxiliary part, 5 sleeve, 50 limiting part, 51 via hole, 52 protruding block, 6 rotating shaft, 60 rotating shaft groove, 61 storage groove, 62 limiting sliding groove, 63 limiting groove, 7 sliding block, 70 limiting block, 8 spring, 9 auxiliary part. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the following will combine the technical scheme in the embodiments of the present application to make a clear and complete description. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application. In addition, the direction terms mentioned in the present application, such as "up", "down", "front", "back", "left", "right", "in", "out" and the like, are only for the direction of the attached drawings. The direction terms are used for better and clearer description and understanding of the present application, and are not indicative or implied of the orientation that the present application must have. Therefore, it cannot be understood as a limitation of the present application.

[0028] Embodiments of the present application Figures 1 to 4As shown in the figure, a stamping die convenient for replacing punch includes a die body and a punch 4, the die body is provided with a mounting groove 20, one end of the punch 4 is matched and inserted into the mounting groove 20, the inner side wall of the mounting groove 20 is provided with a fixing groove 21, the die body is provided with a sleeve 5 which is matched and inserted into the fixing groove 21 through the punch 4, the punch 4 is provided with a punch through hole 42 through which the sleeve 5 passes, the sleeve 5 is provided with a limiting member 50 which limits the rotation of the sleeve 5, the sleeve 5 is provided with a rotating shaft 6 which is limited and arranged inside the sleeve 5, the side wall of the rotating shaft 6 is provided with a rotating shaft groove 60, the rotating shaft groove 60 is matched and slidably provided with a sliding block 7 which is limited to slide, the sliding block 7 is limited so as to avoid the sliding block 7 from completely sliding out of the rotating shaft groove 60, thereby avoiding the difficulty of resetting the sliding block 7, the sliding block 7 is a quadrangular prism with a straight trapezoidal bottom surface, the upper bottom edge of the bottom surface of the sliding block 7 is located outside the sleeve 5, the spring 8 is arranged between the sliding block 7 and the groove bottom of the rotating shaft groove 60, the side wall of the sleeve 5 is provided with a through hole 51 through which the sliding block 7 passes, the die body is provided with a sliding block groove 22 on the inner wall of the fixing groove 21, the sliding block 7 is in abutment with the inner top surface of the sliding block groove 22, thereby preventing the rotating shaft 6 and the sleeve 5 from being separated from the fixing groove 21, and thereby fixing the punch 4, the punch 4 is provided with a hole reducing mechanism which reduces the hole diameter of the punch through hole 42.

[0029] The rotating shaft 6 and the sleeve 5 pass through the punch 4 and are inserted into the mounting groove 20, the sliding block 7 is extended into the sliding block groove 22 through the through hole 51 of the sleeve 5 under the action of the spring 8 by forward rotation of the rotating shaft 6, thereby completing the fixing of the punch 4, at this time, the rotating shaft 6 is rotated in the direction away from the inclined surface of the sliding block 7, the rotating shaft 6 is rotated in the direction of the inclined surface of the sliding block 7 by reverse rotation of the rotating shaft 6, the sliding block 7 is retracted into the rotating shaft groove 60 from the through hole 51 by cooperation of the inclined surface of the sliding block 7 with the through hole 51, thereby allowing the sliding block 7 to be separated from the sliding block groove 22, the inner wall of the sleeve 5 prevents the sliding block 7 from being slid into the sliding block groove 22 again, the rotating shaft 6 and the sleeve 5 are pulled out of the fixing groove 21, and then the punch 4 in the mounting groove 20 is pulled out, thereby completing the disassembly of the punch 4, preferably, a chamfer which cooperates with the inclined surface of the sliding block 7 is arranged on the inner wall of the through hole 51, so that the sliding block 7 is more smoothly retracted into the rotating shaft groove 60, and the punch 4 can be replaced without disassembling the die plate of the stamping die, thereby making the replacement of the punch 4 more convenient.

[0030] Further improvements, such as Figure 1 , Figure 2 and Figure 3As shown in the figure, the mold body is provided with a mold through hole 23, the mold through hole 23, the punch through hole 42 and the mounting groove 20 are concentric with each other, the sleeve 5 passes through the mold through hole 23, the punch through hole 42 and the mounting groove 20 in turn, the mold body is provided with a limiting groove 62 on the inner side wall of the mold through hole 23, one end of the limiting groove 62 is an open structure connected to the outside world, the limiting piece 50 is arranged on the outer side wall of the sleeve 5, the limiting piece 50 is matched and inserted into the limiting groove from the opening, the sleeve 5 is prevented from rotating through the limiting groove and the limiting piece 50, so that the sleeve 5 is stationary when the rotating shaft 6 rotates, and the rotating shaft 6 rotates relative to the sleeve 5.

[0031] Further improvement, as shown in Figure 2 and Figure 3 The sleeve 5 is prevented from rotating through the limiting groove and the limiting piece 50, so that the sleeve 5 is stationary when the rotating shaft 6 rotates, and the rotating shaft 6 rotates relative to the sleeve 5.

[0032] Further improvement, as shown in Figure 2 and Figure 4As shown in the figure, the rotating shaft 6 is provided with an auxiliary part 9 for assisting the rotation of the rotating shaft 6 at one end away from the mounting groove 20, the auxiliary part is located outside the mold body, that is, the auxiliary part is located at one end of the rotating shaft outside the mold body, the auxiliary part 9 can be used without disassembling the mold body, the rotating shaft is facilitated to rotate through the auxiliary part 9, an annular limiting groove 63 is arranged on the side wall of the rotating shaft 6, a protrusion 52 matching slidingly arranged in the limiting groove 63 is arranged on the inner side wall of the sleeve 5, the sleeve 5 is driven to slide through the limiting groove 63 and the protrusion 52 while the rotating shaft 6 is pulled, and the rotation of the rotating shaft 6 relative to the sleeve 5 is not affected.

[0033] Further improvements, as shown in Figure 2 and Figure 4 , the auxiliary part 9 is a semicircular ring structure, the auxiliary part 9 is hinged on the rotating shaft 6, the rotating shaft 6 is provided with a receiving groove 61 for receiving the auxiliary part 9, preferably, the groove bottom of the receiving groove 61 is provided with a magnetic attraction part for magnetically attracting the auxiliary part 9, the space occupied by the auxiliary part 9 is reduced when the auxiliary part is not used through the receiving groove 61.

[0034] Further improvements, as shown in Figure 2 and Figure 3 , the rotating shaft 6 is provided with a limiting sliding groove 62 on one side wall of the rotating shaft groove 60, in this embodiment, the limiting sliding groove 62 is located on the upper inner side wall of the rotating shaft groove 60, the limiting sliding groove 62 extends along the sliding direction of the sliding block 7, the limiting block 70 slidingly arranged in the limiting sliding groove 62 is arranged on the sliding block 7, the sliding block 7 is prevented from sliding out of the rotating shaft groove 60 through the limiting block 70 and the limiting sliding groove 62.

[0035] Further improvements, as shown in Figure 1 and Figure 2 , the mold body includes an upper mold 1 and a lower mold 3, the upper mold 1 is provided with a mounting block 2 for mounting the punch 4, the mounting groove 20 is arranged on the mounting block 2, in the case of damage to the mounting groove 20, only the mounting block 2 needs to be repaired or replaced, and the entire upper mold 1 does not need to be repaired or replaced.

[0036] Further improvements, as shown in Figure 1 and Figure 2 , the punch 4 includes a connecting part 40 and a forming part 41, the connecting part 40 and the forming part 41 are detachably connected, the connecting part 40 is matched and inserted into the mounting groove 20, the sleeve 5 passes through the connecting part 40, a large number of formed products of the forming part 41 of the punch 4 are prone to wear and damage, the punch 4 is divided into the detachably connected connecting part 40 and the forming part 41, so that only the forming part 41 needs to be replaced, saving cost.

[0037] Further improvements, as shown in Figure 2 and Figure 3As shown in the figure, the slider groove 22 is an annular structure around the inner wall of the fixed groove 21, the rotating shaft 6 and the sleeve 5 are inserted into the fixed groove 21 at any angle, and the slider 7 can enter the slider groove 22.

[0038] A method for facilitating replacement of a punch, comprising the steps of:

[0039] S1, rotate the rotating shaft 6 in the forward direction, the rotating shaft 6 rotates relative to the sleeve 5, the slider 7 slides out of the slider groove 22 under the action of the four-prism inclined surface and slides into the rotating shaft groove 60, the inner side wall of the sleeve 5 prevents the slider 7 from sliding into the slider groove 22;

[0040] S2, pull out the rotating shaft and the sleeve from the fixed groove 21 and the punch 4 to be replaced, and then pull out the punch 4 to be replaced from the installation groove 20;

[0041] S3, insert the new punch into the installation groove 20, and then insert the rotating shaft and the sleeve through the punch and into the fixed groove 21;

[0042] S4, rotate the rotating shaft 6 in the reverse direction, the rotating shaft 6 rotates relative to the sleeve 5, the slider 7 slides into the slider groove 22 from the through hole 51 under the action of the spring 8, thereby fixing the new punch 4, and completing the replacement of the punch 4.

[0043] S5, after the sleeve and the punch through hole are loosened, the sleeve and the punch through hole are re-adapted through the shrinkage hole mechanism.

[0044] It should be understood that those skilled in the art can make improvements or changes according to the above description, and all these improvements and changes shall belong to the protection scope of the appended claims of the present application.

Claims

1. A stamping die with an easily replaceable punch, comprising a die body and a punch, characterized in that, The mold body is provided with an installation groove; one end of the punch is fitted into the installation groove; a fixing groove is provided on the inner side wall of the installation groove; a sleeve is provided on the mold body to pass through the punch and fit into the fixing groove; the punch is provided with a punch through hole for the sleeve to pass through; a limiting member is provided on the sleeve to restrict the rotation of the sleeve; a rotating shaft is provided inside the sleeve for limiting rotation; a rotating shaft groove is provided on the side wall of the rotating shaft; a sliding block is fitted inside the rotating shaft groove for limiting sliding; the sliding block is a quadrangular prism with a right-angled trapezoidal base; the upper bottom edge of the bottom surface of the sliding block is located outside the sleeve; a spring is provided between the sliding block and the bottom of the rotating shaft groove; a through hole is provided on the side wall of the sleeve for the sliding block to pass through; a sliding block groove is provided on the inner wall of the fixing groove of the mold body for the sliding block to slide into; the top surface of the sliding block abuts against the inner top surface of the sliding block groove; a hole reduction mechanism is provided on the punch to reduce the diameter of the punch through hole.

2. A stamping die with an easily replaceable punch according to claim 1, characterized in that, The mold body is provided with a mold through hole; the mold through hole, punch through hole and mounting groove are concentric; the sleeve passes through the mold through hole, punch through hole and mounting groove in sequence; the mold body is provided with a limiting groove on the inner side wall of the mold through hole; one end of the limiting groove is an opening structure connecting to the outside; the limiting member is provided on the outer side wall of the sleeve; the limiting member is inserted into the limiting groove from the opening.

3. A stamping die with an easily replaceable punch according to claim 1, characterized in that, The hole-shrinking mechanism includes two clamping blocks; the punch has two opposing punching slots on the inner wall of the punch through hole; the two clamping blocks slide in the corresponding punching slots; the punch has a cavity; a rotating bidirectional lead screw is disposed in the cavity; one end of each of the two clamping blocks extends with an extension corresponding to the two ends of the bidirectional lead screw threadedly connected; a worm gear is disposed on the bidirectional lead screw; a worm gear meshing with the worm gear is rotatably disposed in the cavity; an auxiliary component for assisting the rotation of the worm gear is disposed at one end of the worm gear; an exposed through hole for exposing the auxiliary component is disposed on the punch; and a body through hole for exposing the auxiliary component is disposed on the mold body.

4. A stamping die with an easily replaceable punch according to claim 1, characterized in that, An auxiliary component for assisting the rotation of the shaft is provided at the end of the shaft away from the mounting groove; the auxiliary component is located on the outside of the mold body; an annular limiting groove is provided on the side wall of the shaft; and a protrusion that matches and slides in the limiting groove is provided on the inner side wall of the sleeve.

5. A stamping die with an easily replaceable punch according to claim 4, characterized in that, The auxiliary component is a semi-circular ring structure; the auxiliary component is hinged to the rotating shaft; the rotating shaft is provided with a storage groove for storing the auxiliary component.

6. A stamping die with an easily replaceable punch according to claim 1, characterized in that, The rotating shaft has a limiting groove on one side wall of the rotating shaft groove; the limiting groove extends along the sliding direction of the slider; the slider is provided with a limiting block that slides in the limiting groove.

7. A stamping die with an easily replaceable punch according to claim 1, characterized in that, The mold body includes an upper mold and a lower mold; the upper mold is provided with a mounting block for mounting a punch; the mounting groove is provided on the mounting block.

8. A stamping die with an easily replaceable punch according to claim 1, characterized in that, The punch includes a connecting part and a forming part; the connecting part and the forming part are detachably connected; the connecting part is fitted into a mounting groove; the sleeve passes through the connecting part.

9. A stamping die with an easily replaceable punch according to claim 1, characterized in that, The slider groove is an annular structure that surrounds the inner wall of the fixed groove.

10. A method for facilitating the replacement of a punch, characterized in that, Using a stamping die with an easily replaceable punch as described in any one of claims 1-9, the method includes the following steps: S1, rotate the shaft in the forward direction. The shaft rotates relative to the sleeve. The slider slides out of the slider groove and into the shaft groove under the action of the inclined plane of the quadrangular prism. The inner wall of the sleeve prevents the slider from sliding into the slider groove. S2, pull the shaft and sleeve out of the fixing groove and the punch to be replaced, and then pull the punch to be replaced out of the mounting groove; S3, insert the new punch into the mounting groove, then pass the shaft and sleeve through the punch and insert them into the fixing groove; S4, rotate the shaft in the opposite direction. The shaft rotates relative to the sleeve. The slider slides from the through hole into the slider groove under the action of the spring, thereby fixing the new punch and completing the punch replacement.

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