Quick die changing mechanism for a punch press

Abstract

The utility model discloses a kind of quick die changing mechanism for stamping equipment, belong to stamping equipment technical field, including stamping equipment ontology, lower stamping die, upper stamping head, the surface of the stamping equipment ontology is provided with lower die installation platform. Through the above mode, when the upper die holder moves down and contacts the upper stamping head, the top block directly enters the inner wall of the first clamping hole, the limiting block is then pressed down, and then the compression limit of the first powerful spring is released, and then the state of the plug top-out storage cavity is presented. When the plug top-out storage cavity is entered, the clamping groove presents the effect of quick installation. In addition, the setting of the second clamping hole in the device allows the limiting block to enter the second clamping hole after leaving the inner wall of the first clamping hole, avoiding the pressure release of the first powerful spring causing the plug to impact the inner wall of the clamping groove, causing mutual wear. Overall optimization can improve the work efficiency of the existing stamping equipment during die changing operation.

Description

Technical Field

[0001] This utility model relates to the field of stamping equipment technology, and specifically to a quick die-changing mechanism for stamping equipment. Background Technology

[0002] In modern industrial production, stamping dies are the core equipment for forming and processing metal sheets, and their quick-change technology is crucial for improving production efficiency and reducing downtime. Current stamping die replacement processes widely employ a connection method involving fastening blocks and slots. This involves inserting fastening blocks from the upper and lower die surfaces into slots on the die surface to achieve rapid positioning and high-strength fixation of the die and die head.

[0003] For example, Chinese Patent No. CN213530421U discloses a stamping device with rapid die changing, including a machine body, a worktable, and a lower die on the worktable. A clamping assembly is connected between the lower die and the worktable. The clamping assembly includes a support and a pressure rod. The support is slidably connected to the worktable, and the pressure rod is hinged to the support. One end of the pressure rod is located above the lower die, and the other end is connected to a lifting assembly that drives the pressure rod to rotate. The pressure rod is hinged to the support, and the lifting assembly drives one end of the pressure rod to rotate upward, thereby causing the other end to rotate downward to clamp the lower die. The device is simple to operate and facilitates die changing. While the problem exists, it remains unresolved. However, it has significant drawbacks in practical applications. To ensure precise alignment during the installation of the upper and lower dies and to avoid damage to the dies or deviations in the precision of stamped parts due to misalignment, operators typically place the upper and lower dies together on the surface of the lower die head for preliminary positioning and calibration. During this process, it is necessary to adjust the gap between the upper and lower die heads in advance to ensure that it is consistent with the actual distance between the dies, thereby creating conditions for the rapid engagement of the fastening block and the slot. However, due to uncontrollable factors in manual operation, the gap adjustment is difficult to achieve the ideal precision, which can easily lead to the lower die slot and the fastening block not being accurately aligned.

[0004] Based on this, the present invention designs a quick die-changing mechanism for stamping equipment to solve the above problems. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a quick die-changing mechanism for stamping equipment.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A quick die-changing mechanism for a stamping machine includes a stamping machine body, a lower die, and an upper die head. A lower die mounting platform is provided on the surface of the stamping machine body. An upper die seat, connected by a hydraulic device, is located above the lower die mounting platform. The lower die and upper die head are located between the lower die mounting platform and the upper die seat. The mechanism also includes a mounting assembly and a limiting assembly. A connecting cavity is formed on the bottom surface of the upper die seat. One end of the inner wall of the connecting cavity is connected to a slot formed inside the upper die seat. A mounting assembly is provided between the upper die seat and the upper die head. The mounting assembly includes a mounting sleeve located on the upper surface of the upper die head. A receiving cavity is formed at the end of the mounting sleeve facing the slot. A plug is inserted into the inner wall of the receiving cavity. A first strong spring is fixedly connected between the plug and the end of the receiving cavity. A limiting assembly that cooperates with the plug is provided on the mounting sleeve.

[0008] Furthermore, the limiting component includes a pad, a first slot is provided on the upper part of the inner wall of the mounting sleeve, the pad is fixedly connected to the upper part of the outer surface of the plug, a support strip is fixedly connected to one end of the pad, a limiting block is fixedly connected to the end of the support strip away from the pad, and the limiting block is engaged with the first slot.

[0009] Furthermore, the limiting component also includes a magnetic suction column. The bottom surface of the upper mold base has a notch, and the top surface of the notch has a magnetic suction groove. The top of the magnetic suction column is inserted into the bottom opening of the inner wall of the magnetic suction groove. A top block is fixedly connected to the bottom end of the magnetic suction column. A second strong spring sleeved on the outer periphery of the magnetic suction column is fixedly connected between the top surface of the top block and the top surface of the notch. The first latch is open at the top. The notch is opposite to the first latch, and the contact surface of the top block and the limiting block is the same. The bottom surface of the top block extends beyond the inner wall of the first latch by a length greater than the length of the limiting block located on the inner wall of the first latch.

[0010] Furthermore, a second latch is provided at the top of the end of the inner wall of the mounting sleeve away from the first strong spring. The limiting block is adapted to the opening of the second latch, and the bottom opening of the second latch is flush with the bottom opening of the first latch.

[0011] Furthermore, both sides of the bottom opening of the second bayonet are in the shape of an eight-shaped arc, and the side wall of the upper mold base is provided with a splitting cavity that communicates with the card slot.

[0012] Furthermore, the thickness of the support strip is half the thickness of the pad block, and the support strip is located at the top of the side wall of the pad block;

[0013] Furthermore, the bottom surface of the mounting sleeve and the top surface of the lower die mounting platform are both fixedly connected with inserts, and the side wall of the lower stamping die and the side wall of the upper stamping head are both provided with slots.

[0014] Furthermore, the connecting cavity, slot, mounting sleeve, storage cavity, first strong spring, and plug are all provided in four parts, and are distributed in pairs.

[0015] Compared with the prior art, the advantages of this utility model are as follows: the structure allows the top block to directly enter the inner wall of the first bayonet when the upper die seat moves down to contact the upper punch head, so that the limiting block is pressed down and the compression limit of the first strong spring is released, thus presenting the state of the plug being ejected from the receiving cavity. After the plug is ejected from the receiving cavity, it can enter the slot for quick installation. In addition, the setting of the second bayonet in this device allows the limiting block to enter the second bayonet to re-engage after leaving the inner wall of the first bayonet, avoiding the plug hitting the inner wall of the slot and causing mutual wear due to the pressure release of the first strong spring. The overall optimization can improve the working efficiency of existing stamping equipment when performing die changing operations. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This utility model relates to a three-dimensional main structure of a quick die-changing mechanism for a stamping equipment, where the stamping head is not installed. Figure 1 ;

[0018] Figure 2 This is a three-dimensional structural view of the upper die holder and upper punch head of a quick die changing mechanism for a stamping equipment according to the present invention, in the installation state.

[0019] Figure 3 This is a partial three-dimensional cross-sectional view of the upper die holder of a quick die-changing mechanism for a stamping equipment according to the present invention.

[0020] Figure 4 This utility model relates to a quick die-changing mechanism for a stamping equipment. Figure 3 Enlarged 3D view of the structure at point A in the middle;

[0021] Figure 5 This is a three-dimensional view of the top surface structure of the upper stamping head of a quick die-changing mechanism for a stamping equipment according to the present invention;

[0022] Figure 6 This is a perspective view of a quick die-changing mechanism for a stamping equipment according to the present invention, showing that the bolt does not extend out of the mounting sleeve.

[0023] Figure 7This is a perspective view of the bolt extending from the mounting sleeve of a quick die-changing mechanism for a stamping equipment according to this utility model.

[0024] The labels in the diagram represent:

[0025] 1. Stamping equipment body; 2. Lower die mounting platform; 3. Upper die base; 4. Lower stamping die; 5. Upper stamping head; 6. Connecting cavity; 7. Slot; 8. Mounting sleeve; 9. Storage cavity; 10. First strong spring; 11. Bolt; 22. Splitting cavity; 12. Pad block; 13. Support bar; 14. Limiting block; 15. First bayonet; 16. Second bayonet; 17. Magnetic suction groove; 18. Magnetic suction column; 19. Notch; 20. Second strong spring; 21. Top block; 23. Slot; 24. Insert block. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0027] In some embodiments, please refer to the accompanying drawings. Figure 1-7 A quick die-changing mechanism for a stamping equipment includes a stamping equipment body 1, a lower stamping die 4, and an upper stamping head 5. A lower die mounting platform 2 is provided on the surface of the stamping equipment body 1. An upper die base 3 connected by a hydraulic device is provided above the lower die mounting platform 2. The lower stamping die 4 and the upper stamping head 5 are located between the lower die mounting platform 2 and the upper die base 3. The mechanism also includes an installation component and a limiting component. A connecting cavity 6 is provided on the bottom surface of the upper die base 3. One end of the inner wall of the connecting cavity 6 is connected to a slot 7 opened inside the upper die base 3. An installation component is provided between the upper die base 3 and the upper stamping head 5. The installation component includes an installation sleeve 8 located on the upper surface of the upper stamping head 5. A receiving cavity 9 is provided at the end of the installation sleeve 8 facing the slot 7. A plug 11 is inserted into the inner wall of the receiving cavity 9. A first strong spring 10 is fixedly connected between the plug 11 and the end of the receiving cavity 9. A limiting component that cooperates with the plug 11 is provided on the installation sleeve 8.

[0028] In this embodiment of the invention, the upper mold base 3 moves down to contact the upper punch head 5 to release the restriction on the plug 11, thereby allowing the plug 11 to be pushed into the slot 7, achieving the effect of quick installation.

[0029] In some embodiments, such as Figure 5-7As shown, in a preferred embodiment of a quick mold changing mechanism for a stamping equipment according to the present invention, the limiting component includes a pad 12, a first slot 15 is provided on the upper part of the inner wall of the mounting sleeve 8, the pad 12 is fixedly connected to the upper part of the outer surface of the plug 11, a support strip 13 is fixedly connected to one end of the pad 12, and a limiting block 14 is fixedly connected to the end of the support strip 13 away from the pad 12, and the limiting block 14 is engaged with the first slot 15.

[0030] In this embodiment of the utility model, the structure allows the bolt 11 to be positioned in the initial state before installation, and the engagement of the limiting block 14 and the first bayonet 15 allows the compressed state of the first strong spring 10 to be maintained.

[0031] In some embodiments, such as Figure 5-7 As shown, in a preferred embodiment of a quick mold changing mechanism for a stamping equipment according to the present invention, the limiting component further includes a magnetic column 18. A notch 19 is provided on the bottom surface of the upper mold base 3, and a magnetic groove 17 is provided on the top surface of the notch 19. The top of the magnetic column 18 is inserted into the bottom opening of the inner wall of the magnetic groove 17. A top block 21 is fixedly connected to the bottom end of the magnetic column 18. A second strong spring 20 sleeved on the outer periphery of the magnetic column 18 is fixedly connected between the top surface of the top block 21 and the top surface of the notch 19. The first latch 15 is open at the top. The notch 19 is opposite to the first latch 15, and the contact surface of the top block 21 and the limiting block 14 are the same. The bottom surface of the top block 21 extends beyond the length of the limiting block 14 located on the inner wall of the first latch 15.

[0032] In this embodiment of the utility model, when the upper mold base 3 and the upper punch head 5 are in relative contact, the top block 21 enters the top opening of the first bayonet 15 and pushes the limiting block 14 downward out of the first bayonet 15. During the process, the strength of the second strong spring 20 is used to maintain the pushed-out state. When the limiting block 14 is pushed out of the bottom opening of the first bayonet 15, the first strong spring 10 returns to the reset extended state and pushes the plug 11 into the slot 7.

[0033] In some embodiments, such as Figure 6 and Figure 7 As shown, a second latch 16 is provided at the top of the end of the inner wall of the mounting sleeve 8 away from the first strong spring 10. The limiting block 14 is adapted to the opening of the second latch 16, and the bottom opening of the second latch 16 is flush with the bottom opening of the first latch 15.

[0034] In this embodiment of the utility model, after the limiting block 14 is disengaged from the inner wall of the first bayonet 15, the first strong spring 10 pushes the limiting block 14 into the inner wall of the second bayonet 16 to provide protection for the plug 11.

[0035] In some embodiments, such as Figure 7As shown, the bottom opening of the second bayonet 16 has a figure-eight arc shape on both sides, and the side wall of the upper mold base 3 has a split cavity 22 that communicates with the slot 7.

[0036] In this embodiment of the invention, when a new upper punch head 5 needs to be replaced, the operator can insert a U-shaped workpiece smaller than the diameter of the splitting cavity 22 into the splitting cavity 22 to abut against the plug 11 in the slot 7. During this process, the first strong spring 10 is recompressed, and then the top edge of the limiting block 14 and the arc-shaped surface of the opening of the second bayonet 16 exert intersecting forces. As the plug 11 is pushed, the limiting block 14 disengages from the inner wall of the second bayonet 16 and is re-engaged into the first bayonet 15. The inner wall of the first bayonet 15 is then pushed back to its original position by the limiting block 14. At this time, the upper punch head 5 can be moved down and removed. At the same time, when the upper punch head 5 and the upper die base 3 are combined, the U-shaped rod workpiece can be inserted into the split cavity 22 first, ensuring that the plug 11 enters the connecting cavity 6 first with the mounting sleeve 8. During this process, the limiting block 14 does not engage with the first bayonet 15 until the plug 11 enters the slot 7. Only then does the limiting block 14 engage with the first bayonet 15 for the first time.

[0037] In some embodiments, such as Figure 7 As shown, the thickness of the support strip 13 is half the thickness of the pad 12, and the support strip 13 is located at the top of the side wall of the pad 12.

[0038] In this embodiment of the utility model, a gap can be left between the support bar 13 and the plug 11 to facilitate the movement of the limiting block 14 when it is pressed.

[0039] In some embodiments, such as Figure 1-5 As shown, the bottom surface of the mounting sleeve 8 and the top surface of the lower mold mounting platform 2 are both fixedly connected with inserts 24, and slots 23 are provided on the side wall of the lower stamping die 4 and the side wall of the upper stamping head 5.

[0040] In this embodiment of the utility model, the insert block 24 inserted on the top surface of the upper punch head 5 is fixed to the upper punch head 5 with bolts, which facilitates the subsequent installation of the upper punch head 5.

[0041] In some embodiments, such as Figure 3-7 As shown, there are four of each of the following: connecting cavity 6, slot 7, mounting sleeve 8, storage cavity 9, first strong spring 10, and plug 11, which are distributed in pairs.

[0042] In this embodiment of the invention, the installation of the upper punch head 5 is made stable.

[0043] In the above embodiments, it should be noted that: the notch 19 and the first latch 15 are completely corresponding in the vertical projection direction, and the horizontal offset distance between their centers does not exceed 0.1mm. The initial distance from the bottom surface of the top block 21 to the bottom surface of the upper mold base 3 is less than the sum of the distance from the bottom of the first latch 15 to the top surface of the mounting sleeve 8 and the depth of the limiting block 14 inserted into the first latch 15, with a difference range of 2-5mm. The stroke of the magnetic suction column 18 in the magnetic suction groove 17 is greater than the movement distance of the limiting block 14 completely disengaged from the first latch 15, and the difference between the two is not less than 2mm. In the free state of the second strong spring 20, the distance from the top surface of the top block 21 to the top surface of the notch 19 is equal to the distance when the top block 21 can completely push out the limiting block 14 after the second strong spring 20 is compressed, and the difference between the distance when the second strong spring 20 is compressed is equal to the stroke of the magnetic suction column 18 in the magnetic suction groove 17. The opening height is greater than the height of the limiting block 14, and the difference between the two heights is 0.5-1mm. The depth of the limiting block 14 when it is inserted into the first slot 15 is 5-8mm. The depth of the magnetic groove 17 and the length of the magnetic column 18 satisfy the following: the distance from the top of the magnetic column 18 to the opening of the magnetic groove 17 is not less than 1mm when the second strong spring 20 is compressed to its limit state, so as to prevent the magnetic column 18 from falling out of the magnetic groove 17. The depth of the notch 19 is greater than the sum of the height of the top block 21 and the maximum compression of the second strong spring 20, and the difference between the two is not less than 3mm, so as to provide sufficient space for the movement of the top block 21. The elastic coefficient of the second strong spring 20 is in the range of 50-100N / mm. The elastic force generated under the maximum compression of the spring is greater than the sum of the friction between the limiting block 14 and the first slot 15 and the movement resistance of the magnetic column 18.

[0044] The operation process of the quick die changing mechanism used in this stamping equipment is as follows: Align the slot 23 on the side wall of the lower stamping die 4 with the insert block 24 on the top surface of the lower die mounting platform 2, insert and fix it to complete the installation of the lower stamping die 4. Before this, use bolts to fix the insert block 24 to the upper stamping head 5. Then start the hydraulic device to move the upper die base 3 downward. The top block 21 in the bottom recess 19 enters the top opening of the first bayonet 15. The top block 21 pushes down the limiting block 14. The limiting block 14 is disengaged from the first bayonet 15. At this time, the first strong spring 10 is released from compression and limit, and the plug 11 is ejected from the receiving cavity 9. The plug 11 enters the slot 7 in the upper die base 3 to complete the connection between the upper stamping head 5 and the upper die base 3.

[0045] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A quick die-changing mechanism for a stamping machine, comprising a stamping machine body (1), a lower die (4), and an upper die head (5), wherein a lower die mounting platform (2) is provided on the surface of the stamping machine body (1), and an upper die seat (3) connected by a hydraulic device is provided above the lower die mounting platform (2), and the lower die (4) and the upper die head (5) are located between the lower die mounting platform (2) and the upper die seat (3), characterized in that: It also includes an installation component and a limiting component. The bottom surface of the upper mold base (3) is provided with a connecting cavity (6). One end of the inner wall of the connecting cavity (6) is connected to a slot (7) opened inside the upper mold base (3). An installation component is provided between the upper mold base (3) and the upper punch head (5). The installation component includes an installation sleeve (8) located on the upper surface of the upper punch head (5). The end of the installation sleeve (8) facing the slot (7) is provided with a receiving cavity (9). A plug (11) is inserted into the inner wall of the receiving cavity (9). A first strong spring (10) is fixedly connected between the plug (11) and the end of the receiving cavity (9). A limiting component that works with the plug (11) is provided on the installation sleeve (8).

2. The quick die-changing mechanism for stamping equipment according to claim 1, characterized in that, The limiting component includes a pad (12), and a first slot (15) is provided on the upper part of the inner wall of the mounting sleeve (8). The pad (12) is fixedly connected to the upper part of the outer surface of the plug (11). A support strip (13) is fixedly connected to one end of the pad (12). A limiting block (14) is fixedly connected to the end of the support strip (13) away from the pad (12). The limiting block (14) is engaged with the first slot (15).

3. The quick die-changing mechanism for stamping equipment according to claim 2, characterized in that, The limiting component also includes a magnetic column (18). The bottom surface of the upper mold base (3) is provided with a notch (19). The top surface of the notch (19) is provided with a magnetic groove (17). The top of the magnetic column (18) is inserted into the bottom opening of the inner wall of the magnetic groove (17). The bottom end of the magnetic column (18) is fixedly connected to a top block (21). The top surface of the top block (21) and the top surface of the notch (19) are fixedly connected to a second strong spring (20) sleeved on the outer periphery of the magnetic column (18). The first latch (15) is open at the top. The notch (19) is opposite to the first latch (15). The contact surface of the top block (21) and the limiting block (14) are consistent. The bottom surface of the top block (21) extends longer than the length of the limiting block (14) located on the inner wall of the first latch (15).

4. The quick die-changing mechanism for stamping equipment according to claim 2, characterized in that, The inner wall of the mounting sleeve (8) is provided with a second latch (16) at the top of the end away from the first strong spring (10). The limiting block (14) is adapted to the opening of the second latch (16), and the bottom opening of the second latch (16) is flush with the bottom opening of the first latch (15).

5. The quick die-changing mechanism for stamping equipment according to claim 4, characterized in that, The bottom opening of the second bayonet (16) is shaped like an eight-character arc, and the side wall of the upper mold base (3) is provided with a split cavity (22) that communicates with the slot (7).

6. The quick die-changing mechanism for stamping equipment according to claim 2, characterized in that, The thickness of the support strip (13) is half the thickness of the pad (12), and the support strip (13) is located on the top of the side wall of the pad (12).

7. The quick die-changing mechanism for stamping equipment according to claim 1, characterized in that, The bottom surface of the mounting sleeve (8) and the top surface of the lower mold mounting platform (2) are both fixedly connected with inserts (24), and slots (23) are provided on the side wall of the lower stamping die (4) and the side wall of the upper stamping head (5).

8. The quick die-changing mechanism for stamping equipment according to claim 1, characterized in that, The connecting cavity (6), the slot (7), the mounting sleeve (8), the storage cavity (9), the first strong spring (10), and the plug (11) are all provided in four parts, and are distributed in pairs.

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