Stamping die capable of automatically pulling and feeding materials

Abstract

The invention relates to a stamping die capable of automatically pulling and feeding materials. The stamping die comprises a lower die and an upper die which are arranged in an opening and closing mode. The material moving block is horizontally arranged on the upper side of the lower die in a sliding manner; the hook control block is vertically arranged on the material moving block in a sliding mode, a material pulling hook used for being embedded into the material pulling hole is arranged on the upper side of the hook control block, and the material pulling hook abuts against the inner walls of the two sides, symmetrical relative to the hole center, of the material pulling hole; the material moving linkage assembly is connected with the upper die and the material moving block and used for enabling the material moving block to do reciprocating motion in the opening and closing process of the upper die and the lower die; the hook control linkage assembly is connected with the upper die and the hook control block and used for enabling the hook control block to do reciprocating motion in the opening and closing process of the upper die and the lower die; wherein before the material moving block pulls the material belt forwards, the material pulling hook is embedded into the material pulling hole firstly, and before the material moving block returns backwards, the material pulling hook is separated from the material pulling hole firstly. The high-speed stepping type material pulling and feeding device has the effects that the stability of high-speed stepping type material pulling and feeding can be improved, the positioning capacity of a material belt can be enhanced, and the stamping treatment precision is improved.

Description

Technical Field

[0001] The present application relates to the field of stamping devices, and in particular to a stamping die for automatic material pulling and feeding. Background Art

[0002] Stamping is a process in which a press and a stamping die apply external force to the stamping material to deform it, thereby obtaining a workpiece of a specific shape and size. Among them, a continuous stamping die is a cold stamping die that can perform multiple stampings on the stamping material under the drive of a press. Each time the continuous stamping die completes a stamping, the stamping material needs to be transported a certain distance downstream from the continuous stamping die until the multiple stamping processes are completely completed. However, in order to keep the die structure simple and the equipment low cost, it is expected that the die itself has the function of pulling and feeding the material.

[0003] In the related technology, such as the patent with publication number CN106541040A, the patent name is automatic feeding mechanism for stamping die and the patent of stamping die, the function of automatic pulling and feeding is realized. The specific working principle is as follows: when the moving block moves toward the downstream direction of the material belt walking channel, the material belt is pulled downstream by the pulling hook for one step distance, so that the required product can be punched out when the stamping die is closed. When the driving mechanism drives the moving block and the pulling hook to move upstream, since the pulling hook has a first inclined surface extending to its top wall on the side facing the upstream of the material belt walking channel, in the process of the pulling hook moving upstream with the moving block, the upper part of the pulling hook is guided by its first inclined surface and disengaged from the pulling hole until the pulling hook moves into place and is opposite to the pulling hole of the previous step distance. The upper part of the pulling hook is inserted into the pulling hole and waits for the next feeding and mold closing and stamping. This is repeated to automatically complete the automatic feeding of the material belt.

[0004] Regarding the above-mentioned related technologies, there is a problem that, first, the material strip will float up during the hole-punching process, so the mold needs to provide the material strip with floating movement space. Therefore, in the process of high-speed step-by-step moving of the material strip, it is easy for the pulling hook to fail to embed into the pulling hole, which may easily lead to failure of the material strip to move; secondly, since the size of the pulling hook is slightly smaller than the size of the pulling hole, the pulling hook cannot completely restrict the displacement of the material strip after completing one movement of the material strip, resulting in low stamping processing accuracy. Summary of the invention

[0005] In order to achieve automatic material pulling and feeding while improving the stability of high-speed step-by-step material pulling and feeding and enhancing the positioning capability of the material strip to improve the stamping processing accuracy, the present application provides a stamping die with automatic material pulling and feeding.

[0006] The present application provides a stamping die for automatic material pulling and feeding, which adopts the following technical solution: A stamping die for automatic material pulling and feeding, comprising: Lower and upper dies with opening and closing settings; A material transfer block is horizontally slidably arranged on the upper side of the lower die; A control hook block is vertically slidably arranged on the material moving block, and a material pulling hook for embedding into the material pulling hole is arranged on the upper side of the control hook block, and the material pulling hook abuts against the inner walls of the material pulling hole on both sides symmetrically relative to the hole center; A material shifting linkage assembly, connected to the upper die and the material shifting block, and used to allow the material shifting block to reciprocate during the opening and closing process of the upper die and the lower die; A hook control linkage assembly is connected to the upper die and the hook control block, and is used to allow the hook control block to reciprocate during the opening and closing process of the upper die and the lower die; Before the material moving block pulls the material belt forward, the material pulling hook is first inserted into the material pulling hole, and before the material moving block returns backward, the material pulling hook is first disengaged from the material pulling hole.

[0007] By adopting the above technical scheme, firstly, since the control hook block is slidably arranged on the material shifting block, before the material shifting block returns to its initial position, the control hook block can slide down to allow the material pulling hook to detach from the material pulling hole, and then the material shifting block returns to its initial position. In this process, the material strip does not need to float up, so the mold does not need to provide space for the material strip to float up, so that the material pulling hook will not fail to be embedded in the material pulling hole due to the floating of the material strip, and thus, the material strip will not fail to move in the process of high-speed stepping movement of the material strip; secondly, under the premise of the sliding arrangement of the control hook block, the material pulling hook can abut against the inner walls on both sides of the material pulling hole that are symmetrical relative to the center of the hole, so that the material pulling hook can accurately limit the material strip, so that the material strip cannot be displaced relative to the material pulling hook, thereby improving the stamping processing accuracy.

[0008] In addition, the reciprocating motion of the hook control block and the material transfer block can be achieved by opening and closing the mold under the action of the hook control linkage component and the material transfer linkage component, so the mold itself has the function of automatic material pulling and feeding, thereby still keeping the structure of the mold simple.

[0009] Preferably, the guide structure formed by the material transfer linkage assembly is located at a guide height near an unprocessed area of ​​the material strip.

[0010] By adopting the above technical solution, before the upper mold and the lower mold are closed, the moving block will move the material strip forward by a step distance. When the mold is subsequently closed, the material strip is stationary, and only the upper mold will move relative to the lower mold. Therefore, there is no need to balance the synchronization between the mold closing and the material strip movement, thereby making it easier to achieve higher stamping processing accuracy.

[0011] Preferably, the material shifting linkage assembly includes a downward pressure return block and a forward spring, the downward pressure return block is arranged on the lower side of the upper mold, the downward pressure return block is provided with a return guide surface and a retaining guide surface abutting against the material shifting block, the return guide surface is arranged to extend obliquely, and is used to allow the material shifting block to move backward when the upper mold and the lower mold are closed; the retaining guide surface is arranged to extend vertically, and the retaining guide surface is closer to the unprocessed area of ​​the material strip than the return guide surface; the forward spring is respectively connected to the lower mold and the material shifting block, and is used to allow the material shifting block to move forward when the retaining guide surface is out of contact with the material shifting block.

[0012] By adopting the above technical scheme, firstly, the power of the downward movement of the upper mold is converted into the force for the shifting block to move backward through the return guide surface, but the force for the forward movement of the shifting block comes from the elastic force of the forward spring, so that the matching structure between the upper mold and the shifting block does not need to be a fully enclosed connection structure matched with the guide rod and guide groove, so the difficulty of assembling and maintaining the mold will be reduced; secondly, the setting of the retaining guide surface, when the upper mold is just beginning to separate from the lower mold, the shifting block will still contact the retaining guide surface. During this process, the shifting block will not move forward immediately, so the punching knife has enough time to leave the area where the material strip is located, thereby realizing the function of the mold through a simple structure.

[0013] Preferably, the hook control linkage assembly includes a pressure hook block, a floating spring and a pressure holding spring. The pressure hook block is vertically slidably arranged on the lower side of the upper mold, and the lower end face of the pressure hook block abuts against the hook control block. When the material moving block returns to its initial position backward, the hook control block is separated from the lower end face of the pressure hook block; the floating spring is respectively connected to the material moving block and the hook control block, and is used to allow the hook control block to move upward when the hook control block is separated from the lower end face of the pressure hook block; the pressure holding spring is connected to the pressure hook block and the upper mold, and the elastic force of the pressure holding spring is greater than that of the floating spring, and is used to keep the pulling hook out of the pulling hole before the material moving block returns to its initial position backward.

[0014] By adopting the above technical scheme, when closing the mold, the pressure hook block first presses down the control hook block to make the pulling hook escape from the material belt hole. When the downward pressing return block contacts the material shifting block, the pressure holding spring is gradually compressed so as not to interfere with the downward movement of the upper mold, and at the same time, sufficient pressure is provided to keep the pulling hook out of the material belt hole. When the material shifting block abuts against the retaining guide surface, the material shifting block has returned to its initial position backwards, and at the same time, the control hook block is separated from the lower end surface of the pressure hook block, and the pulling hook is embedded in the material belt hole under the action of the floating spring, so that the material shifting block is ready to move the material belt forward again when closing the mold. At the same time, the power of the whole process comes from the movement of the upper mold without the help of other power elements, so the structure of the mold can be kept simple.

[0015] Preferably, two pulling hooks are provided, and a shift seat and a shift drive assembly are provided between the pulling hook and the hook control block. The shift seat slides in a circle around the center of the hook control block. One shift seat is provided for one pulling hook, one pulling hook is embedded in a pulling hole, and one pulling hook is abutted against the inner wall on one side of the pulling hole; the shift drive assembly is connected to the shift seat.

[0016] By adopting the above technical solution, under the action of the displacement drive component, the displacement seat can slide in a circle, so that the distance between the pulling hook and the center of the material belt can be changed to adapt to material belts of different widths, and the pulling hook can also change the distance from the center of the material belt hole along the length direction of the material belt to adapt to material belt holes of different apertures, so that the mold can dynamically adapt to different processing parameters.

[0017] Preferably, the shift seat is in the shape of a long rod, and one end of the shift seat is rotatably connected to the center of the hook control block; the shift drive assembly includes a shift slider, a shift transfer block, a shift electromagnet and a shift balance spring, the shift slider is horizontally slidably arranged, and the movement direction of the shift slider is parallel to the movement direction of the material shifting block; the shift transfer block is slidably connected to the shift seat, and the sliding direction of the shift transfer block is parallel to the length direction of the shift seat, and the shift transfer block is rotatably connected to the shift slider; the shift electromagnet is fixedly arranged on the hook control block, and one shift slider is arranged between two of the shift electromagnets, and the two shift electromagnets drive the shift sliders by magnetic attraction; the shift balance spring is respectively connected to the hook control block and the shift slider, and is used to balance the magnetic force applied to the shift slider by the shift electromagnet.

[0018] By adopting the above technical scheme, under the action of the shifting electromagnet and the shifting balance spring, the shifting slider can change its position on the control hook block along the sliding direction of the material shifting block, wherein in the process of the shifting slider moving, the shifting block will rotate relative to the shifting slider, and the shifting block and the shifting seat will slide parallel to the length direction of the shifting seat, so that the sliding of the shifting slider is converted into the rotation of the shifting seat, thereby driving the shifting seat to slide in a circle. At the same time, the position of the shifting slider can be changed dynamically. In the process of the material shifting block moving the material strip forward, the pulling hook can move backward relative to the material shifting block, thereby changing the step distance of the material strip moving forward, so that it can adapt to the situation where a set of stamping processes requires the material strip to move twice with different step distances, thereby improving the processing range adapted to the mold.

[0019] Preferably, the rotating connection parts of the two displacement seats are stacked.

[0020] By adopting the above technical solution, the minimum distance between the material pulling hook and the center of the material strip can be smaller, so that a wider range of processing parameters can be dynamically adapted.

[0021] Preferably, a center distance adjusting seat and a center distance adjusting assembly are provided between the pulling hook and the displacement seat, the center distance adjusting seat is provided for the pulling hook to be set, and the center distance adjusting seat is slidably arranged along the length direction of the displacement seat; the center distance adjusting assembly is connected to the center distance adjusting seat.

[0022] By adopting the above technical solution, the pulling hook can also move along the length direction of the displacement seat so that the distance between the pulling hook and the center of the material strip can change in a larger range. This can adapt to material strips with a larger size range, material strip holes with a larger aperture range, and a larger range of step changes, thereby allowing the mold to adapt to a wider range of processing parameters.

[0023] Preferably, the center distance adjusting assembly comprises an input contact block, a distance adjusting electromagnet, a distance adjusting pull block, a distance adjusting connecting rope and a distance adjusting balance spring, the input contact block is arranged on the upper surface of the control hook block, the distance adjusting electromagnet is arranged on the lower surface of the displacement seat, the distance adjusting electromagnet is connected to the sliding contact of the input contact block; the distance adjusting pull block is slidably arranged along the length direction of the displacement seat, the distance adjusting pull block is located at the lower side of the displacement seat, the distance adjusting pull block is located on the side of the distance adjusting electromagnet away from the rotation connection of the displacement seat, and the distance adjusting pull block is magnetically attracted by the distance adjusting electromagnet; one end of the distance adjusting connecting rope is connected to the side of the center distance adjusting seat away from the rotation connection of the displacement seat, and the other end is connected to the side of the distance adjusting pull block away from the rotation connection of the displacement seat, and the displacement seat is passed through the middle part; the distance adjusting balance spring is connected to the displacement seat and the center distance adjusting seat, and is used to balance the pulling force applied to the center distance adjusting seat by the distance adjusting connecting rope.

[0024] By adopting the above technical scheme, the input contact block continuously supplies power to the distance adjusting electromagnet during the movement of the material shifting block, and the magnetic force of the distance adjusting electromagnet attracts the distance adjusting pulling block to approach the rotating connection of the shifting seat. The magnetic force exerted on the distance adjusting pulling block applies a pulling force away from the rotating connection of the shifting seat to the center distance adjusting seat with the help of the distance adjusting connecting rope. At the same time, under the elastic force of the distance adjusting balance spring, the center distance adjusting seat can be located at different positions of the shifting seat, thereby realizing the adjustment of the position of the pulling hook on the shifting seat. In addition, except for the input contact block, the remaining components are distributed along the length direction of the shifting seat, which can also keep the overall structure of the mold simple.

[0025] Preferably, the hook control block is connected to a spring cable, and one end of the spring cable away from the hook control block is fixedly connected to the lower mold.

[0026] By adopting the above technical solution, during the linear motion of the material moving block and the up and down motion of the control hook block, the spring cable can use its own characteristics to stably transfer current to the input contact block and the displacement electromagnet, thereby stably realizing various desired functions of the mold through a simple structure.

[0027] In summary, the present application includes at least one of the following beneficial technical effects: Because the control hook block is slidably arranged on the material moving block, before the material moving block returns to its initial position, the control hook block can be allowed to slide down to allow the material pulling hook to be separated from the material pulling hole, and then the material moving block can be allowed to return to its initial position. In this process, the material belt does not need to float up, so the mold does not need to provide space for the material belt to float up, so that the material pulling hook will not fail to fit into the material pulling hole due to the floating of the material belt, and the material belt movement failure will not occur easily during the high-speed stepping movement of the material belt; Under the premise of the sliding setting of the control hook block, the material pulling hook can abut against the inner walls on both sides of the material pulling hole symmetrically relative to the hole center, so that the material pulling hook can accurately limit the material strip, so that the material strip cannot be displaced relative to the material pulling hook, thereby improving the stamping processing accuracy; The position of the material puller can be changed dynamically to accommodate a wider range of material sizes, a wider range of material holes, and a wider range of step changes, thereby expanding the range of processing parameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is an overall schematic diagram of the stamping die in the embodiment of the present application.

[0029] Figure 2 It is an exploded schematic diagram made to illustrate the coordination mode of the material transfer linkage component and the hook control linkage component in the embodiment of the present application.

[0030] Figure 3 It is an exploded schematic diagram made to illustrate the specific structure of the displacement drive component and the center distance adjustment component in the embodiment of the present application.

[0031] Figure 4 It is a schematic diagram made in the embodiment of the present application to illustrate how to change the moving step distance of the material belt.

[0032] Figure 5 It is a schematic diagram made to reflect the layout structure of the spring cable and the control hook block on the mold in the embodiment of the present application.

[0033] Explanation of the accompanying drawings: 1. lower mold; 2. upper mold; 3. material shifting block; 4. control hook block; 41. material pulling hook; 42. displacement seat; 43. center distance adjusting seat; 5. material shifting linkage assembly; 51. downward pressure return block; 511. return guide surface; 512. position retaining guide surface; 52. forward spring; 6. control hook linkage assembly; 61. pressure hook block; 62. floating spring; 63. pressure retaining spring; 7. displacement driving assembly; 71. displacement slider; 72. displacement transfer block; 73. displacement electromagnet; 74. displacement balancing spring; 8. center distance adjusting assembly; 81. input contact block; 82. distance adjusting electromagnet; 83. distance adjusting pulling block; 84. distance adjusting connecting rope; 85. distance adjusting balancing spring; 9. spring cable. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-Figure 5 This application is described in further detail.

[0035] The embodiment of the present application discloses a stamping die for automatically pulling and feeding materials.

[0036] Reference Figure 1 and Figure 2 The stamping die for automatic material pulling and feeding includes a lower die 1, an upper die 2, a material moving block 3, a control hook block 4, a material moving linkage assembly 5 and a control hook linkage assembly 6. The lower die 1 is usually fixedly installed on an external frame, and the upper die 2 is located above the lower die 1. The upper die 2 will approach or move away from the lower die 1 under the action of components such as an oil cylinder or a gas cylinder, thereby realizing the opening and closing between the upper die 2 and the lower die 1, and a metal workpiece will pass between the upper die 2 and the lower die 1. The metal workpiece is in the form of a material strip. At the same time, material strip holes are opened on both sides of the material strip in the width direction. The material strip holes serve as an intermediate medium for external components to pull the material strip so that the material strip can continuously pass through the die forward to complete the stamping process. In this embodiment, the movement direction of the material strip is taken as the forward direction, and the reverse direction of the movement direction of the material strip is taken as the backward direction.

[0037] Reference Figure 1 and Figure 2 The material shifting block 3 is horizontally slidably arranged on the upper side of the lower mold 1, and the sliding direction is parallel to the movement direction of the material strip. The lower mold 1 can realize the installation of the material shifting block 3 by providing a guide rail or a slide groove; the control hook block 4 is vertically slidably installed on the material shifting block 3, and the material shifting block 3 can be provided with a guide rod partially passing through the control hook block 4, so as to realize the sliding installation of the control hook block 4, and at the same time, a material pulling hook 41 is provided on the upper surface of the control hook block 4, which will be embedded in the material pulling hole, and the material pulling hook 41 will abut against the inner walls on both sides of the material pulling hook 41 which are symmetrical with respect to the center of the hole, so that the material pulling hook 41 can limit the material strip in the forward and backward directions, so that the material strip cannot be displaced relative to the material pulling hook 41, so that after the material strip is moved into place, the material strip is not easy to deviate, thereby improving the stamping processing accuracy.

[0038] Reference Figure 1 and Figure 2 The material shifting linkage assembly 5 is connected to the upper mold 2 and the material shifting block 3, and the material shifting block 3 will make reciprocating motion during the opening and closing process of the upper mold 2 and the lower mold 1; the control hook linkage assembly 6 is connected to the upper mold 2 and the control hook block 4, and the control hook block 4 will make reciprocating motion during the opening and closing process of the upper mold 2 and the lower mold 1. It should be noted that before the material shifting block 3 pulls the material strip forward, the material pulling hook 41 is first embedded in the material pulling hole, and before the material shifting block 3 returns backward, the material pulling hook 41 is first disengaged from the material pulling hole. Since the material pulling hook 41 is disengaged from the material pulling hole when the material shifting block 3 returns backward, the material strip will not float up in this process, and the mold does not need to provide space for the material strip to float up, so that the material pulling hook 41 will not fail to be embedded in the material pulling hole due to the floating of the material strip, and thus the material strip movement failure is not likely to occur during the high-speed stepping movement of the material strip.

[0039] In addition, in this embodiment, the reciprocating movement of the hook control block 4 and the material transfer block 3 are achieved by opening and closing the mold, so the mold itself has the function of automatically pulling and feeding materials, thereby keeping the structure of the mold simple.

[0040] Reference Figure 1 and Figure 2 Considering that the relative position accuracy between the material strip and the mold will also affect the quality of the stamping process during the stamping process, the following setting is preferably adopted: the guide structure formed by the material shifting linkage assembly 5 is the guide height at a position close to the unprocessed area of ​​the material strip, wherein the guide height means that the closer the guide structure is to the rear, the higher the horizontal height is, that is, the closer the guide structure is to the rear, the farther it is from the lower mold 1. When the mold is opened, the material shifting block 3 moves the material strip forward, so that when the mold is closed, only the upper mold 2 will move relative to the lower mold 1, so there is no need to balance the synchronization between the mold closing and the material strip movement, thereby making it easier to achieve higher stamping processing accuracy.

[0041] Reference Figure 1 and Figure 2 Considering that the reciprocating motion of the material shifting block 3 is driven by the power of the mold opening and closing processes, the material shifting linkage assembly 5 needs to convert the vertical motion into the horizontal motion, and there must be an inclined structure in the orthogonal direction formed by the vertical direction and the horizontal direction. In order to reduce the difficulty of mold assembly, the material shifting linkage assembly 5 includes a downward pressure return block 51 and a forward spring 52. The downward pressure return block 51 is fixedly mounted on the lower side of the upper mold 2. The downward pressure return block 51 is integrally formed with a return guide surface 511 and a retaining guide surface 512 that abut against the material shifting block 3, wherein the return guide surface 511 is arranged to extend obliquely to convert the downward force into a force for the material shifting block 3 to move backward when the mold is closed.

[0042] Reference Figure 1 and Figure 2 The retaining guide surface 512 is vertically extended and is closer to the unprocessed area of ​​the material strip than the return guide surface 511, that is, the retaining guide surface 512 is located on the rear side of the return guide surface 511, and when the material shifting block 3 abuts against the retaining guide surface 512, the material shifting block 3 moves backward to the initial position, that is, moves to the position closest to the unprocessed area of ​​the material strip; the forward spring 52 is respectively connected to the lower mold 1 and the material shifting block 3, and will allow the material shifting block 3 to move forward when the retaining guide surface 512 is out of abutment with the material shifting block 3.

[0043] Reference Figure 1 and Figure 2 In summary, the material shifting block 3 and the downward pressure return block 51 are only in contact on one side, not on both sides such as the front and rear sides, that is, there is no need for a fully enclosed connection structure similar to the cooperation of the guide rod and the guide groove. Therefore, the difficulty of assembling and maintaining the mold will be reduced. At the same time, when the mold is just opened, the material shifting block 3 will not move forward immediately, so that the punching knife has enough time to leave the area where the material strip is located, thereby realizing the function of the mold through a simple structure. In addition, considering that the material shifting block 3 needs to pull the material strip, the downward pressure return block 51 will not directly abut against the material shifting block 3, but indirectly abut against the material shifting block 3. Specifically, a bolt will be installed on both sides of the material shifting block 3. This bolt will pass through the lower mold 1, and the penetration place is a waist-shaped hole. This hole cooperates with the bolt to form the necessary structure for the sliding connection of the material shifting block 3, and then the bolt will abut against the downward pressure return block 51.

[0044] Reference Figure 1 and Figure 2 In this embodiment, there are two triggering timings of the control hook linkage assembly 6, one is that before the material shifting block 3 moves backward, the control hook linkage assembly 6 needs to make the control hook block 4 move down, and the other is that before the material shifting block 3 moves forward, the control hook linkage assembly 6 needs to make the control hook block 4 move up, so there is mutual influence between the control hook linkage assembly 6 and the material shifting linkage assembly 5, and the control hook linkage assembly 6 specifically includes a pressing hook block 61, a floating spring 62 and a pressure-maintaining spring 63, and the pressing hook block 61 is vertically slidably arranged on the lower side of the upper mold 2, and specifically, the pressing hook block 61 can be slidably penetrated on the upper mold 2, and the lower end surface of the pressing hook block 61 is in contact with the control hook block 4, but when the material shifting block 3 returns to its initial position backward, the control hook block 4 is separated from the lower end surface of the pressing hook block 61, so as to prepare for the subsequent upward movement of the control hook block 4.

[0045] Reference Figure 1 and Figure 2The floating spring 62 is connected to the material shifting block 3 and the control hook block 4 respectively. When the control hook block 4 is separated from the lower end surface of the pressure hook block 61, the control hook block 4 can be moved up by elastic force; the pressure holding spring 63 is connected to the pressure hook block 61 and the upper mold 2. The elastic force of the pressure holding spring 63 is greater than the floating spring 62. While playing the role of connecting and installing the pressure hook block 61, it can also always press down the control hook block 4 before the material shifting block 3 returns to its initial position to keep the pulling hook 41 out of the pulling hole. In the process of mold closing, the control hook block 4 will move down and let the pulling hook 41 out of the pulling hole to prepare for the backward movement of the material shifting block 3. At the same time, when the material shifting block 3 moves backward to its initial position, the control hook block 4 will move up and let the pulling hook 41 embed into the pulling hole to prepare for the next movement of the material strip by the material shifting block 3.

[0046] In summary, in the entire mold closing and opening process, no other power elements are used to realize the movement of the material moving block 3 and the hook control block 4, so that the mold structure can be kept simple.

[0047] Reference Figure 2 and Figure 3 In order to allow the mold to dynamically adapt to different processing parameters, such as strips of different widths, different thicknesses, and different materials, these differences will result in different distances between the strip hole and the strip center, as well as different diameters of the strip hole. In order to adapt to these differences, the following settings are correspondingly provided: a control hook block 4 will have two material pulling hooks 41, and a displacement seat 42 and a displacement drive assembly 7 are provided between the material pulling hook 41 and the control hook block 4. The displacement seat 42 slides in a circle around the center of the control hook block 4, where the center line of the material strip passes through At the center of the control hook block 4, a displacement seat 42 is provided for a material pulling hook 41, and a material pulling hook 41 is embedded in a material pulling hole, and a material pulling hook 41 is in contact with the inner wall of one side of the material pulling hole. The displacement driving component 7 is used to drive the displacement seat 42. Under the action of the circular motion of the displacement seat 42, the distance between the material pulling hook 41 and the center of the material strip can be changed to adapt to material strips of different widths, and the distance between the material pulling hook 41 and the center of the material strip hole can be changed along the length direction of the material strip to adapt to material strip holes of different apertures.

[0048] Reference Figure 2 and Figure 3The displacement seat 42 will be in the shape of a long rod, and one end of the displacement seat 42 is rotatably connected to the center of the control hook block 4 through a rotating shaft, so that the displacement seat 42 can slide in a circle. At the same time, the displacement drive assembly 7 will include a displacement slider 71, a displacement transfer block 72, a displacement electromagnet 73 and a displacement balance spring 74. The displacement slider 71 is arranged to slide horizontally, and the movement direction of the displacement slider 71 is parallel to the movement direction of the material moving block 3; the displacement transfer block 72 is slidably connected to the displacement seat 42, and the sliding direction of the displacement transfer block 72 is parallel to the movement direction of the material moving block 3. In the length direction of the displacement seat 42, the displacement rotating block 72 and the displacement sliding block 71 are rotationally connected through a rotating shaft; the displacement electromagnet 73 is fixedly installed on the upper side of the control hook block 4, and a displacement sliding block 71 is provided between the two displacement electromagnets 73, and the two displacement electromagnets 73 drive the displacement sliding block 71 by magnetic attraction; the displacement balance spring 74 is respectively connected to the control hook block 4 and the displacement sliding block 71, and the elastic force of the displacement balance spring 74 is used to balance the magnetic force applied to the displacement sliding block 71 by the displacement electromagnet 73.

[0049] Reference Figure 2 and Figure 3 In summary, under the action of the displacement electromagnet 73 and the displacement balance spring 74, the displacement slider 71 can change its position on the control hook block 4 along the sliding direction of the material shifting block 3, wherein during the movement of the displacement slider 71, the displacement transfer block 72 will rotate relative to the displacement slider 71, and the displacement transfer block 72 and the displacement seat 42 will slide parallel to the length direction of the displacement seat 42, so that the sliding of the displacement slider 71 is converted into the rotation of the displacement seat 42, so that the displacement seat 42 can be driven to slide in a circular manner.

[0050] Reference Figure 3 and Figure 4 In addition, due to the special structure of the displacement drive assembly 7, the position of the displacement slider 71 can be changed dynamically, that is, the displacement slider 71 can also move when the material shifting block 3 moves. In the process of the material shifting block 3 moving the material strip forward, the material pulling hook 41 can move backward relative to the material shifting block 3, so that the step distance of the material strip moving forward can be changed. This working mode can adapt to the situation of multi-step processing, that is, to complete a set of stamping processes, the material strip needs to be moved forward twice, and the two step distances are different, so that the processing range adapted to the mold can be improved. At the same time, due to the different two movement step distances, there are usually two kinds of material strip hole spacings on this material strip, and the material strip holes with different spacings are at different distances from the center of the material strip, so the displacement seat 42 needs to rotate, and cannot just be a simple linear motion.

[0051] in Figure 4 In the figure, mark A is the step distance where the material pulling hook 41 does not move relative to the material shifting block 3, mark B is the step distance where the material pulling hook 41 moves relative to the material shifting block 3, and mark C is the center line of the material strip.

[0052] Reference Figure 3 In addition, in the present embodiment, since the displacement seat 42 is rod-shaped and rotated, the layout areas between the driving elements involved in the two displacement seats 42 are parallel and spaced apart from each other, so the related driving elements will not overlap or merge, so the rotating connection parts of the two displacement seats 42 can be stacked together, so as to keep the mold structure simple while making the minimum distance between the pulling hook 41 and the center of the material strip smaller, so as to dynamically adapt to a wider range of processing parameters.

[0053] Reference Figure 3 The range of processing parameters that the mold can dynamically adapt to depends on how large the range of distance changes between the material pulling hook 41 and the center of the material strip can be. The larger the range, the more it can adapt to material strips with a larger size range, material strip holes with a larger aperture range, and a larger range of step changes. The corresponding settings are as follows: a center distance adjusting seat 43 and a center distance adjusting component 8 are provided between the material pulling hook 41 and the displacement seat 42. The center distance adjusting seat 43 is located on the upper side of the displacement seat 42. The center distance adjusting seat 43 is provided for the material pulling hook 41 to be set. The center distance adjusting seat 43 is slidably arranged along the length direction of the displacement seat 42. Specifically, a guide rail can be used to realize the sliding installation of the center distance adjusting seat 43, so as to change the position of the material pulling hook 41 on the displacement seat 42, so that the range of distance changes between the material pulling hook 41 and the center of the material strip can be expanded.

[0054] Reference Figure 3 The center distance adjustment component 8 is connected to the center distance adjustment seat 43. The center distance adjustment component 8 includes an input contact block 81, a distance adjustment electromagnet 82, a distance adjustment pull block 83, a distance adjustment connecting rope 84 and a distance adjustment balance spring 85. The input contact block 81 is fixedly mounted on the upper surface of the control hook block 4, and the distance adjustment electromagnet 82 is arranged on the lower surface of the displacement seat 42. The distance adjustment electromagnet 82 is connected to the input contact block 81 by sliding contact; the distance adjustment pull block 83 is slidably arranged along the length direction of the displacement seat 42. Specifically, a guide rail can be used to realize the sliding connection between the distance adjustment pull block 83 and the displacement seat 42. The distance adjustment pull block 83 Located at the lower side of the displacement seat 42, the distance adjusting block 83 is located on the side of the distance adjusting electromagnet 82 away from the rotation connection of the displacement seat 42, and the distance adjusting block 83 is magnetically attracted by the distance adjusting electromagnet 82; one end of the distance adjusting connecting rope 84 is connected to the side of the rotation connection of the center distance adjusting seat 43 away from the displacement seat 42, and the other end is connected to the side of the distance adjusting block 83 away from the rotation connection of the displacement seat 42, and the displacement seat 42 is passed through the middle part; the distance adjusting balance spring 85 is connected to the displacement seat 42 and the center distance adjusting seat 43, and the elastic force of the distance adjusting balance spring 85 balances the pulling force applied to the center distance adjusting seat 43 by the distance adjusting connecting rope 84.

[0055] Reference Figure 3The working principle is as follows: the input contact block 81 continuously supplies power to the distance adjusting electromagnet 82 during the movement of the material shifting block 3; the magnetic force of the distance adjusting electromagnet 82 attracts the distance adjusting pull block 83 to approach the rotating connection of the displacement seat 42; the magnetic force exerted on the distance adjusting pull block 83 applies a pulling force away from the rotating connection of the displacement seat 42 to the center distance adjusting seat 43 with the help of the distance adjusting connecting rope 84; at the same time, under the elastic force of the distance adjusting balance spring 85, the center distance adjusting seat 43 can be located at different positions of the displacement seat 42, thereby realizing the adjustment of the position of the material pulling hook 41 on the displacement seat 42, and this adjustment is dynamic, so it can also adapt to the mode of high-speed stepping moving material belt; in addition, except for the components of the center distance adjusting component 8 other than the input contact block 81, the remaining components are distributed along the length direction of the displacement seat 42, which can also keep the overall structure of the mold simple.

[0056] Reference Figure 3 and Figure 5 Since both the displacement electromagnet 73 and the distance adjustment electromagnet 82 need to be powered on before they can be used, but the material shifting block 3 will move horizontally and the control hook block 4 will move up and down, in order to maintain the working stability of the two electromagnets, the control hook block 4 is connected to a spring cable 9, and the end of the spring cable 9 away from the control hook block 4 is connected to the lower mold 1. The characteristics of the spring cable 9 can stably realize the desired function of the mold through a simpler structure.

[0057] The implementation principle of an automatic material pulling and feeding stamping die in the embodiment of the present application is as follows: since the control hook block 4 is slidably arranged on the material shifting block 3, before the material shifting block 3 returns to its initial position, the control hook block 4 can slide down to allow the material pulling hook 41 to disengage from the material pulling hole, and then the material shifting block 3 returns to its initial position. In this process, the material belt does not need to float up, so the mold does not need to provide space for the material belt to float up, so that the material pulling hook 41 will not fail to be embedded in the material pulling hole due to the floating of the material belt, and thus, the material belt will not fail to move in the process of high-speed stepping movement of the material belt. At the same time, the material pulling hook 41 can abut against the inner walls on both sides of the material pulling hole that are symmetrical with respect to the hole center, so that the material pulling hook 41 can accurately limit the material belt, so that the material belt cannot be displaced relative to the material pulling hook 41, thereby improving the stamping processing accuracy.

[0058] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A stamping die for automatic material pulling and feeding, characterized in that: include: A lower mold (1) and an upper mold (2) that are arranged to open and close; A material transfer block (3) is horizontally slidably arranged on the upper side of the lower mold (1); A control hook block (4) is vertically slidably arranged on the material moving block (3), and a material pulling hook (41) for embedding into the material pulling hole is arranged on the upper side of the control hook block (4), and the material pulling hook (41) abuts against the inner walls of the material pulling hole on both sides symmetrically relative to the hole center; A material transfer linkage assembly (5) connected to the upper die (2) and the material transfer block (3) and used to allow the material transfer block (3) to perform reciprocating motion during the opening and closing process of the upper die (2) and the lower die (1); A hook control linkage assembly (6) is connected to the upper mold (2) and the hook control block (4) and is used to allow the hook control block (4) to perform reciprocating motion during the opening and closing process of the upper mold (2) and the lower mold (1); Before the material moving block (3) pulls the material belt forward, the material pulling hook (41) is first inserted into the material pulling hole, and before the material moving block (3) returns backward, the material pulling hook (41) is first released from the material pulling hole.

2. The automatic drawing and feeding stamping die according to claim 1 is characterized in that: The guide structure formed by the material transfer linkage assembly (5) is a guide high point at a position close to the unprocessed area of ​​the material strip.

3. The automatic drawing and feeding stamping die according to claim 2 is characterized in that: The material shifting linkage assembly (5) comprises a downward pressing return block (51) and an advancing spring (52). The downward pressing return block (51) is arranged on the lower side of the upper mold (2). The downward pressing return block (51) is provided with a return guide surface (511) and a retaining guide surface (512) which are in contact with the material shifting block (3). The return guide surface (511) is arranged to extend obliquely and is used to allow the material shifting block (3) to move backward when the upper mold (2) and the lower mold (1) are closed; the retaining guide surface (512) is arranged to extend vertically and is closer to the unprocessed area of ​​the material strip than the return guide surface (511); the advancing spring (52) is respectively connected to the lower mold (1) and the material shifting block (3) and is used to allow the material shifting block (3) to move forward when the retaining guide surface (512) is out of contact with the material shifting block (3).

4. The automatic drawing and feeding stamping die according to claim 3 is characterized in that: The control hook linkage assembly (6) comprises a pressure hook block (61), a floating spring (62) and a pressure-maintaining spring (63); the pressure hook block (61) is vertically slidably arranged on the lower side of the upper mold (2); the lower end surface of the pressure hook block (61) abuts against the control hook block (4); when the material moving block (3) returns to its initial position, the control hook block (4) is separated from the lower end surface of the pressure hook block (61); the floating spring (62) is respectively abutted against the material moving block (3); The block (3) is connected to the control hook block (4) and is used to allow the control hook block (4) to move upward when the control hook block (4) is separated from the lower end surface of the pressure hook block (61); the pressure-maintaining spring (63) is connected to the pressure hook block (61) and the upper mold (2), and the elastic force of the pressure-maintaining spring (63) is greater than that of the floating spring (62), and is used to keep the pulling hook (41) out of the pulling hole before the material moving block (3) returns to its initial position.

5. The automatic drawing and feeding stamping die according to claim 1 is characterized in that: Two material pulling hooks (41) are provided, and a displacement seat (42) and a displacement drive assembly (7) are provided between the material pulling hook (41) and the hook control block (4). The displacement seat (42) slides in a circle around the center of the hook control block (4). One of the displacement seats (42) is provided for one of the material pulling hooks (41), one of the material pulling hooks (41) is embedded in a material pulling hole, and one of the material pulling hooks (41) is in contact with the inner wall of one side of the material pulling hole; the displacement drive assembly (7) is connected to the displacement seat (42).

6. The automatic drawing and feeding stamping die according to claim 5, characterized in that: The displacement seat (42) is in the shape of a long bar, and one end of the displacement seat (42) is rotatably connected to the center of the control hook block (4); the displacement drive assembly (7) comprises a displacement slider (71), a displacement transfer block (72), a displacement electromagnet (73) and a displacement balance spring (74); the displacement slider (71) is arranged to slide horizontally, and the movement direction of the displacement slider (71) is parallel to the movement direction of the material shifting block (3); the displacement transfer block (72) is slidably connected to the displacement seat (42), and the sliding direction of the displacement transfer block (72) is parallel to the displacement seat (42), the displacement transfer block (72) is rotationally connected to the displacement slider (71); the displacement electromagnet (73) is fixedly arranged on the control hook block (4), one displacement slider (71) is arranged between two displacement electromagnets (73), and the two displacement electromagnets (73) drive the displacement slider (71) by magnetic attraction; the displacement balance spring (74) is respectively connected to the control hook block (4) and the displacement slider (71), and is used to balance the magnetic force applied by the displacement electromagnet (73) to the displacement slider (71).

7. The automatic drawing and feeding stamping die according to claim 6, characterized in that: The rotating connection parts of the two displacement seats (42) are stacked.

8. The automatic drawing and feeding stamping die according to claim 6, characterized in that: A center distance adjusting seat (43) and a center distance adjusting assembly (8) are arranged between the material pulling hook (41) and the displacement seat (42); the center distance adjusting seat (43) is provided for the material pulling hook (41) to be arranged, and the center distance adjusting seat (43) is slidably arranged along the length direction of the displacement seat (42); the center distance adjusting assembly (8) is connected to the center distance adjusting seat (43).

9. The automatic drawing and feeding stamping die according to claim 6, characterized in that: The central distance adjustment component (8) comprises an input contact block (81), a distance adjustment electromagnet (82), a distance adjustment pull block (83), a distance adjustment connecting rope (84) and a distance adjustment balance spring (85); the input contact block (81) is arranged on the upper surface of the control hook block (4); the distance adjustment electromagnet (82) is arranged on the lower surface of the displacement seat (42); the distance adjustment electromagnet (82) is connected to the input contact block (81) by sliding contact; the distance adjustment pull block (83) is slidably arranged along the length direction of the displacement seat (42); the distance adjustment pull block (83) is located at the lower side of the displacement seat (42); the distance adjustment pull block (83) is located at the upper side of the displacement seat (42); and the distance adjustment pull block (83) is located at the lower side of the displacement seat (42). The distance adjusting block (83) is magnetically attracted by the distance adjusting electromagnet (82) on the side of the electromagnet (82) away from the rotation connection of the displacement seat (42); one end of the distance adjusting connecting rope (84) is connected to the side of the central distance adjusting seat (43) away from the rotation connection of the displacement seat (42), and the other end is connected to the side of the distance adjusting block (83) away from the rotation connection of the displacement seat (42), and the displacement seat (42) is passed through the middle part; the distance adjusting balance spring (85) is connected to the displacement seat (42) and the central distance adjusting seat (43), and is used to balance the tension applied to the central distance adjusting seat (43) by the distance adjusting connecting rope (84).

10. The automatic drawing and feeding stamping die according to claim 9, characterized in that: The hook control block (4) is connected to a spring cable (9), and one end of the spring cable (9) away from the hook control block (4) is fixedly connected to the lower mold (1).

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