Stamping device for removing black printing dimpled grains and application method

Abstract

The invention discloses a stamping device for removing black printing dimpled grains and an application method, and relates to the technical field of shell material machining. The side pressing device comprises an upper die assembly, a lower die assembly, a first driving device and a side pressing assembly. An extrusion part is arranged at the bottom of the lower die assembly; the side pressing assembly comprises a side pushing part, a side wall part and a side guiding part. A second driving device is arranged at the bottom of the side wall part, a pushing part is arranged at the bottom of the side guide part, a plurality of protruding parts are arranged on the side, abutting against the to-be-machined workpiece, of the side pushing part at intervals, under driving of the first driving device and the second driving device, the upper die assembly and the lower die assembly clamp the upper side and the lower side of the to-be-machined workpiece, and the protruding parts extrude the side wall of the to-be-machined workpiece; and meanwhile, black printing dimpled grains are prevented from being generated. By adopting the technical scheme, the friction contact area is reduced and the ejection force is generated under the action of the lug boss, so that the accumulation of redundant materials is prevented, the generation of black marks and dimpled grains is effectively avoided, the attractiveness and the quality of products are improved, the production efficiency can be improved, and the cost can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of shell material processing, and in particular to a punching device for removing black print concave patterns and an application method thereof. Background Art

[0002] With the development of manufacturing industry, shell material processing technology has been widely used, especially in the electronics, automobile, home appliance and other industries. Shell material stamping is a commonly used processing method, which applies pressure to metal sheets or other materials such as plastics through molds to deform them into the desired shape. This process can efficiently produce parts of various complex shapes, but in the process of shell material stamping, in order to ensure the subsequent processing accuracy, it is usually necessary to leave a certain margin on the edge. However, the margin area is prone to material accumulation, resulting in the generation of lateral concave text, making the appearance of the product appear not smooth and full, reducing the beauty of the product; at the same time, during the stamping process, the hard friction between the mold and the material will form black marks at the corners of the product, further reducing the beauty of the product and reducing the durability of the product. Therefore, the above problems not only affect the appearance quality of the product, but also reduce the production efficiency of the product and increase the process cost. Therefore, it is urgently needed to improve. Summary of the invention

[0003] The purpose of the present invention is to provide a punching device and application method for removing black marks and concave patterns in view of the defects and shortcomings of the prior art, which has the advantages of being able to remove black marks and concave patterns, improve the appearance and quality of products, and also improve production efficiency and reduce costs.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a punching device for removing black stamped concave patterns, comprising: an upper die assembly, a lower die assembly assembled on the lower side of the upper die assembly, a first driving device assembled on the upper side of the upper die assembly and used to drive the upper die assembly to move toward one side of the lower die assembly and cooperate with the lower die assembly to clamp the upper and lower sides of the workpiece to be processed, and a side pressure assembly assembled between the upper die assembly and the lower die assembly and used to press the side wall of the workpiece to be processed;

[0005] The bottom of the lower die assembly is provided with an extrusion member for generating an upward extrusion force toward the workpiece to be processed;

[0006] The side pressure assembly includes: a side pusher abutting against the side wall of the workpiece to be processed, a side wall portion arranged at the lower side of the side pusher and used to press the end of the side wall of the workpiece to be processed, and a side guide portion arranged at a side of the side pusher away from the workpiece to be processed and used to move the side pusher toward the side of the workpiece to be processed and cooperate with the lower die assembly to clamp the side wall of the workpiece to be processed;

[0007] A second driving device is provided at the bottom of the side wall portion, a pushing member is provided at the bottom of the side guide portion, and a plurality of protrusions are provided at intervals on one side of the side pushing portion abutting against the workpiece to be processed. Driven by the first driving device and the second driving device, the upper mold assembly and the lower mold assembly clamp the upper and lower sides of the workpiece to be processed, and the protrusions squeeze the side wall of the workpiece to be processed to avoid direct friction between the side pressure assembly and the side wall of the workpiece to be processed to produce black marks.

[0008] The present invention further provides that the protrusion includes: a plane abutting against the side wall of the workpiece to be processed, and a guiding inclined surface contacting the end of the side wall of the workpiece to be processed.

[0009] The present invention further provides that the lower mold assembly is provided with a lower mold plate in the side wall portion for extruding the lower side of the workpiece to be processed, and the upper mold assembly is provided with an upper mold plate in the side push portion for extruding the upper side of the workpiece to be processed and cooperating with the lower mold plate for clamping.

[0010] The present invention is further arranged that the extrusion member is a first nitrogen spring, the pushing member is a second nitrogen spring, and the first nitrogen spring is assembled at the bottom of the lower template.

[0011] The present invention further provides that the side pusher comprises: a side close to the workpiece to be processed is provided with an avoidance groove for avoiding the upper template, and a first inclined surface is provided on a side away from the workpiece to be processed.

[0012] The present invention further provides that a second inclined surface abutting against the first inclined surface and provided in parallel with the first inclined surface is provided on a side of the side guide portion facing the side push portion.

[0013] The present invention further provides that the side wall portion includes: a fixed block assembled at the bottom of the side push portion, and an extrusion block detachably connected to a side close to the lower template; an extrusion protrusion is provided on the top of the extrusion block for extruding the side wall end of the workpiece to be processed.

[0014] The present invention further provides that the upper mold assembly is provided with a first upper plate, a second upper plate and a third upper plate sleeved on the side pressure assembly in sequence from top to bottom;

[0015] The lower die assembly comprises: a first lower plate arranged at a side close to a workpiece to be processed, a second lower plate arranged at a lower side of the first lower plate, and a third lower plate for carrying the extrusion member and the pushing member.

[0016] The present invention further provides that the extrusion member includes: a first cylinder body assembled on the third lower plate, and a first rod body arranged on the upper side of the first cylinder body, penetrating the second upper plate, and connected to the lower side of the lower template;

[0017] The pusher includes: a second cylinder body assembled on the third lower plate, and a second rod body arranged on the upper side of the second cylinder body, penetrating the first lower plate and the second lower plate, and connected to the lower side of the side guide.

[0018] A method for applying the punching device for removing black print concave patterns as described above is constructed, comprising the following steps:

[0019] S1. placing the workpiece to be processed on the lower die assembly, starting the first driving device to drive the upper die assembly to move toward one side of the lower die assembly, so that the upper die assembly cooperates with the lower die assembly to clamp the workpiece to be processed. At this time, under the action of the extrusion member at the bottom of the lower die assembly, the extrusion member applies an extrusion force upward, thereby increasing the clamping force of the upper die assembly and the lower die assembly to clamp the workpiece to be processed;

[0020] S11. The upper mold assembly presses down the side pressing assembly, the side pushing portion abuts against the side guide portion, and under the action of the pushing member, the side guide portion moves toward the side of the workpiece to be processed so that the side wall of the workpiece to be processed and the protrusion of the side pushing portion are squeezed to reduce direct friction between the side wall of the workpiece to be processed and the mold, and avoid black marks and concave lines caused by friction;

[0021] S2. Start the second driving device, which drives the side wall portion to press the side wall and the side wall end of the workpiece to be processed, so as to increase the extrusion force on the side wall of the workpiece to be processed.

[0022] After adopting the above technical solution, the beneficial effects of the present invention are:

[0023] 1. In the present invention, an upper die assembly, a lower die assembly arranged at the lower side of the upper die assembly, and a side pressure assembly arranged between the upper die assembly and the lower die assembly are provided, wherein an extrusion member for generating an upward extrusion force toward the workpiece to be processed is provided at the bottom of the lower die assembly, and the upper die assembly is driven to move toward one side of the lower die assembly by driving a first driving device assembled above the upper die assembly, and the extrusion member drives the lower die assembly to generate an upward extrusion force toward the workpiece to be processed, so that the upper die assembly and the lower die assembly cooperate with each other to clamp the upper and lower sides of the workpiece to be processed, and then the side wall of the workpiece to be processed is extruded and formed by the side pressure assembly, thereby improving the stamping efficiency of the stamping device.

[0024] 2. In the present invention, the side pressure assembly includes a side pushing portion, a side wall portion and a side guide portion, wherein the side pushing portion abuts against the side wall of the workpiece to be processed, and a plurality of protrusions are arranged at intervals on one side of the side pushing portion abutting against the side wall of the workpiece to be processed, and the side wall portion is arranged at the lower side of the side pushing portion, and a second driving device is arranged at the bottom thereof for squeezing the side wall end of the workpiece to be processed, and a pushing member is arranged at the bottom of the side guide portion, which is used to move the side pushing portion toward one side of the workpiece to be processed and cooperate with the lower mold assembly to clamp the side wall of the workpiece to be processed, and then under the cooperative driving of the first driving device and the second driving device, the upper mold assembly and the lower mold assembly clamp the upper and lower sides of the workpiece to be processed, and the protrusion squeezes the side wall of the workpiece to be processed, and the action of the protrusion reduces the friction contact area and the ejection force generated, thereby preventing the accumulation of excess material, thereby avoiding the side pressure assembly and the side wall of the workpiece to be processed from directly rubbing against each other to produce black marks and concave patterns, improving the overall aesthetics and quality of the product, and also improving production efficiency and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0026] Figure 1 It is a schematic diagram of the structure of a punching device for removing black printed concave patterns;

[0027] Figure 2 It is a schematic diagram of the structure explosion of a punching device for removing black stamped concave patterns;

[0028] Figure 3 It is a schematic side view of the whole punching device for removing the black print concave pattern;

[0029] Figure 4 yes Figure 3 A schematic cross-sectional view of the AA line;

[0030] Figure 5 is another overall side view of a punching device for removing black print concave patterns;

[0031] Figure 6 yes Figure 5 A schematic cross-sectional view of the BB line;

[0032] Figure 7 It corresponds to Figure 6 Enlarged schematic diagram of middle C part;

[0033] Figure 8 It is another exploded schematic diagram of the structure of the punching device for removing the black stamped concave pattern;

[0034] Fig. 9 It corresponds to Figure 8 Enlarged schematic diagram of part D in the middle.

[0035] Description of reference numerals: 100, upper mold assembly; 110, upper mold plate; 120, first upper plate; 130, second upper plate; 140, third upper plate; 200, lower mold assembly; 210, extrusion member; 211, first cylinder body; 212, first rod body; 220, lower mold plate; 230, first lower plate; 231, second through hole; 240, second lower plate; 241, first through hole; 250, third lower plate; 260, receiving groove; 300, side pressure Component; 310, side thrust part; 311, raised part; 3111, plane; 3112, guide inclined surface; 312, avoidance groove; 313, first inclined surface; 320, side wall part; 321, fixing block; 322, extrusion block; 3221, extrusion protrusion; 330, side guide part; 331, second inclined surface; 340, pushing member; 341, second cylinder body; 342, second rod body; 400, second driving device; 500, workpiece to be processed. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0037] This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. After reading this specification, those skilled in the art can make non-creative modifications to this embodiment as needed, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

[0038] This embodiment relates to a punching device for removing black print concave lines, referring to Figure 1-Figure 8 , comprising: an upper die assembly 100, a lower die assembly 200, a first driving device (not shown) and a side pressing assembly 300. The lower die assembly 200 is assembled on the lower side of the upper die assembly 100, and an extrusion member 210 for generating an upward extrusion force toward the workpiece 500 is arranged at the bottom of the lower die assembly 200. Under the action of the extrusion member 210, the lower die assembly 200 cooperates with the upper die assembly 100 to clamp the workpiece 500. The first driving device is assembled above the upper die assembly 100, and is used to drive the upper die assembly 100 to move toward one side of the lower die assembly 200, and provides sufficient clamping force so that the upper die assembly 100 and the lower die assembly 200 cooperate to clamp the upper and lower sides of the workpiece 500, specifically, the lower die assembly 200 squeezes the lower inner side of the workpiece 500. The side pressing assembly 300 is assembled between the upper die assembly 100 and the lower die assembly 200, and is used to squeeze the side wall of the workpiece 500. Therefore, under the cooperation of the upper die assembly 100 , the lower die assembly 200 and the side pressure assembly 300 , the workpiece 500 is clamped and squeezed, so that the workpiece 500 is successfully stamped and formed.

[0039] Further, see Figure 2-Figure 4 The side pressure assembly 300 includes: a side pusher 310, a side wall 320 and a side guide 330. The side pusher 310 directly contacts the side wall of the workpiece 500 to be processed. Under the push of the side guide 330, the side pusher 310 applies pressure to the side wall of the workpiece 500 to be processed. Then, the side pusher 310 abuts against the side wall of the workpiece 500. A plurality of protrusions 311 are arranged at intervals. The protrusions 311 contact and squeeze the side wall of the workpiece 500 to be processed, thereby reducing the direct friction between the side wall and the mold, specifically reducing the contact area between the side wall and the side pusher 310, avoiding the generation of black marks, specifically avoiding the generation of black marks on the corners of the workpiece 500 to be processed, thereby affecting the overall aesthetics. At the same time, during the stamping process, the protrusion 311 can generate a force to push out the side wall of the workpiece 500, so that the protrusion 311 presses against the side wall of the workpiece 500, avoiding the accumulation of excess material of the workpiece 300 and generating transverse grooves. Specifically, multiple protrusions 311 are arranged in a ring on the side of the side thrust portion 310 against the side wall of the workpiece 500, and the uniform distribution of the protrusions 311 ensures that the side wall of the workpiece 500 is subjected to uniform pressure in all directions, avoiding deformation or damage caused by uneven local force. The side guide part 330 is arranged on the side of the side push part 310 away from the workpiece 500 to be processed. The bottom of the side guide part 330 is provided with a pusher 340. The pusher 340 pushes the side guide part 330 to move the side push part 310 toward the side of the workpiece 500 to be processed, and the side wall of the workpiece 500 to be processed is squeezed in cooperation with the lower mold assembly 200. The movement of the side push part 310 is accurately controlled by the pusher 340. The side guide part 330 reduces the defective rate caused by motion error and improves production efficiency. The side wall part 320 is arranged on the lower side of the side push part 310, and is used to support and position the side wall end of the workpiece 500 to be processed. The bottom of the side wall part 320 is provided with a second driving device 400, and the second driving device 400 drives the side wall part 320 to squeeze the side wall and the side wall end of the workpiece 500 to be processed. Specifically, the lower mold assembly 200 is provided with a receiving groove 260 for accommodating the second driving device 400. The side wall portion 320 and the side push portion 310 work together to prevent the accumulation of excess material, further avoiding the formation of transverse grooves and improving the surface quality of the product. At the same time, the supporting effect of the side wall portion 320 enhances the stability of the workpiece 500 during the stamping process and reduces the risk of deformation. Therefore, the synergistic effect of the side push portion 310, the side wall portion 320 and the side guide portion 330, through the action of the protrusion 311, reduces the friction contact area and the ejection force generated to prevent the accumulation of excess material, effectively avoid the generation of black marks and grooves, improve the overall product appearance and quality, and can also improve production efficiency and reduce production costs.

[0040] In this embodiment, refer to Fig. 9, the raised portion 311 includes: a plane 3111 abutting against the side wall of the workpiece 500 to be processed and a guide bevel 3112 in contact with the side wall end of the workpiece 500 to be processed. The plane 3111 portion ensures that the side wall of the workpiece 500 to be processed is subjected to uniform pressure in all directions, thereby avoiding deformation or damage caused by local uneven force. The guide bevel 3112 reduces the resistance when the side push portion 310 contacts the side wall end of the workpiece 500 to be processed, making it easier for the side wall end of the workpiece 500 to be processed to slide when contacting the guide bevel 3112 of the raised portion 311, thereby reducing friction. Therefore, the combination of the plane 3111 portion and the guide bevel 3112 significantly improves the surface quality of the product by reducing friction and guiding the uniform distribution of materials, and reduces the generation of black marks and concave lines.

[0041] In this embodiment, refer to Figure 2 , the lower mold assembly 200 is provided with a lower mold plate 220 in the side wall portion 320 for squeezing the lower side of the workpiece 500 to be processed. The lower mold plate 220 is in direct and close contact with the lower side of the workpiece 500 to provide support and help molding. At the same time, the support function of the lower mold plate 220 protects the lower side of the workpiece 500 to be processed and avoids damage caused by excessive pressure. The upper mold assembly 100 is provided with an upper mold plate 110 in the side push portion 310 for squeezing the upper side of the workpiece 500 to be processed and cooperating with the lower mold plate 220 to clamp. The upper mold plate 110 is arranged in the side push portion 310 of the upper mold assembly 100, cooperates with the lower mold plate 220, clamps the workpiece 500 to be processed from the upper side, and ensures the stability and molding effect of the workpiece 500 to be processed during the stamping process.

[0042] In this embodiment, refer to Figure 4 and Figure 6 , the extrusion member 210 is a first nitrogen spring, and the pushing member 340 is a second nitrogen spring. The first nitrogen spring is assembled at the bottom of the lower template 220, and the second nitrogen spring is connected to the bottom of the side guide 330. The first nitrogen spring is installed at the bottom of the lower template 220, and is used to apply extrusion force upward to help the workpiece 500 to be processed by stamping. The second nitrogen spring is used to push the side guide 330 so that it moves the side push part 310 toward the side of the workpiece 500 to be processed, thereby improving the effect of side pressure. At the same time, by precisely controlling the movement of the side push part 310, the second nitrogen spring reduces the friction between the side push part 310 and the side wall of the workpiece 500 to be processed, further reducing the generation of black marks. In other embodiments, the extrusion member 210 and the pushing member 340 can also be set as other stamping components.

[0043] In this embodiment, refer to Figure 4The side pusher 310 includes: a side near the workpiece 500 for avoiding the upper template 110 and a first inclined surface 313. The side pusher 310 is provided with an avoidance groove 312 for avoiding the upper template 110 and a side away from the workpiece 500. The avoidance groove 312 ensures that the upper template 110 will not interfere with the side pusher 310 when moving downward, and provides sufficient space so that the upper template 110 can smoothly cooperate with the lower template 220 to clamp the workpiece 500. The first inclined surface 313 reduces the friction between the side pusher 310 and the side guide 330, so that the side pusher 310 can move more smoothly.

[0044] Furthermore, the side guide portion 330 is provided with a second inclined surface 331 which is in contact with and parallel to the first inclined surface 313, and which is disposed on the side facing the side thrust portion 310. The contact between the second inclined surface 331 and the first inclined surface 313 ensures the smooth transmission of the thrust, so that the side thrust portion 310 can accurately move toward the workpiece 500 to be processed, ensures the efficient transmission of the thrust, and improves the movement efficiency of the side thrust portion 310.

[0045] In this embodiment, refer to Figure 6-Figure 7 The side wall portion 320 includes: a fixed block 321 assembled at the bottom of the side push portion 310 and an extrusion block 322 detachably connected to the side near the lower template 220. An extrusion protrusion 3221 for extruding the side wall end of the workpiece 500 to be processed is provided on the top of the extrusion block 322. The fixed block 321 is used to fix the extrusion block 322, ensuring the stability of the side wall portion 320 during the stamping process and reducing the defective rate caused by shaking or movement. The extrusion block 322 can be detachably assembled on the fixed block 321 so that the extrusion block 322 can be replaced according to different workpieces 500 to be processed, thereby improving the flexibility and scope of application of the device and facilitating maintenance and replacement. The extrusion protrusion 3221 is used to extrude the side wall end of the workpiece 500 to be processed, ensuring the uniform distribution and molding effect of the material, avoiding the accumulation of material at the side wall end, and reducing the formation of transverse grooves.

[0046] Specifically in this embodiment, the thickness of the extrusion protrusion 3221 on the top of the extrusion block 322 is equal to the thickness of the side wall of the workpiece 500 to be processed. The extrusion protrusion 3221 and the side wall of the workpiece 500 to be processed are clamped between the side push portion 310 and the lower template 220, thereby limiting the thickness of the side wall of the workpiece 500 to be processed after stamping, further avoiding material accumulation, and reducing the formation of transverse grooves at the end of the side wall of the workpiece 500 to be processed.

[0047] In this embodiment, refer to Figure 3-Figure 8The upper mold assembly 100 is provided with a first upper plate 120, a second upper plate 130 and a third upper plate 140 sleeved on the side pressing assembly 300 in sequence from top to bottom. The first upper plate 120 and the second upper plate 130 provide the main structure of the upper mold assembly 100, ensuring the stability and strength of the entire upper mold assembly 100. The third upper plate 140 is sleeved on the side pressing assembly 300, cooperates with the first lower plate 230 of the lower mold assembly 200, clamps the workpiece 500, and ensures the stability and forming effect of the workpiece 500 during the stamping process.

[0048] Further, the lower mold assembly 200 includes: a first lower plate 230, a second lower plate 240 and a third lower plate 250. The first lower plate 230 is arranged on a side close to the workpiece 500 to be processed, the second lower plate 240 is arranged on the lower side of the first lower plate 230, and the third lower plate 250 is used to carry the extrusion member 210 and the push member 340. The first lower plate 230 is used to support and preliminarily shape the workpiece 500 to be processed. The second lower plate 240 provides additional support and structural strength. The third lower plate 250 is used to carry the extrusion member 210 (first nitrogen spring) and the push member 340 (second nitrogen spring).

[0049] In this embodiment, refer to Figure 3-Figure 8 The extrusion member 210 includes: a first cylinder 211 and a first rod 212. The first cylinder 211 is assembled on the third lower plate 250. The first rod 212 is disposed on the upper side of the first cylinder 211, passes through the second upper plate 130 and is connected to the lower side of the lower mold plate 220. The first cylinder 211 drives the first rod 212 to move upward through the internal hydraulic pressure or air pressure, providing the upward extrusion force required for the workpiece 500 to be processed.

[0050] Further, the pusher 340 includes: a second cylinder 341 and a second rod 342. The second cylinder 341 is assembled on the third lower plate 250. The second rod 342 is arranged on the upper side of the second cylinder 341, passes through the first lower plate 230 and the second lower plate 240 and is connected to the lower side of the side guide 330. The second cylinder 341 drives the second rod 342 to move upward through the internal hydraulic pressure or air pressure, providing the lateral thrust required by the side guide 330. At the same time, the friction between the side pusher 310 and the side wall of the workpiece 500 to be processed is reduced, and the generation of black marks and transverse grooves is further reduced.

[0051] Specifically in this embodiment, refer to Figure 8 The second lower plate 240 is provided with a first through hole 241 for avoiding the first rod body 212, and the first lower plate 230 is provided with a second through hole 231 for avoiding the second rod body 342. The first lower plate 230 includes two first lower plate 230 bodies arranged from top to bottom, and the second lower plate 240 includes two second lower plate 240 bodies arranged from top to bottom.

[0052] An application method of a punching device for removing black print concave patterns comprises the following steps:

[0053] Step S1: Accurately place the workpiece 500 on the lower mold assembly 200 to ensure that its position is correct and stable, check the alignment of the workpiece 500 and the mold to avoid offset or misalignment. Start the first drive device to drive the upper mold assembly 100 to move toward the side of the lower mold assembly 200. The upper mold assembly 100 and the lower mold assembly 200 cooperate to clamp the workpiece 500 to ensure the stability of the workpiece 500 during the stamping process. Under the action of the extrusion member 210 at the bottom of the lower mold assembly 200, the first rod body 212 applies an extrusion force upward to increase the clamping force of the upper mold assembly 100 and the lower mold assembly 200 to clamp the workpiece 500 to ensure the molding effect of the workpiece 500 during the stamping process.

[0054] Step S11: The upper mold assembly 100 continues to press downward, and the side pusher 310 in the side pressure assembly 300 abuts against the side guide 330. The side guide 330 is pushed by the pusher 340 to move the side pusher 310 toward the side of the workpiece 500. The protrusion 311 on the side pusher 310 contacts and squeezes the side wall of the workpiece 500, reducing the direct friction between the side wall of the workpiece 500 and the mold, and avoiding black marks and concave lines caused by friction.

[0055] Step S2: Start the second driving device 400 to drive the side wall portion 320 to press the side wall and the side wall end of the workpiece 500. The extrusion protrusion 3221 on the top of the extrusion block 322 on the side wall portion 320 contacts the side wall end of the workpiece 500 to increase the extrusion force on the side wall of the workpiece 500. The thickness of the extrusion protrusion 3221 is equal to the thickness of the side wall of the workpiece 500 to ensure that the side wall of the workpiece 500 is uniformly stressed during the stamping process to avoid material accumulation and deformation.

[0056] Under the joint action of the first driving device and the second driving device 400, a certain pressure is maintained to ensure that the workpiece 500 is fully formed. The forming effect of the workpiece 500 is confirmed by observation or using a detection tool to ensure that there are no black marks and concave lines.

[0057] Specifically, the method further includes step S3: after the stamping is completed, the first driving device and the second driving device 400 move in the opposite direction to reset the upper die assembly 100, the lower die assembly 200 and the side pressure assembly 300. The appearance and size of the finished product are checked to ensure that they meet the quality standards. The die surface is cleaned to prepare for the next stamping operation.

[0058] The above is only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A punching device for removing black marks, characterized in that: The invention comprises: an upper die assembly (100), a lower die assembly (200) mounted on the lower side of the upper die assembly (100), a first driving device mounted on the upper side of the upper die assembly (100) and used for driving the upper die assembly (100) to move toward one side of the lower die assembly (200) and cooperating with the lower die assembly (200) to clamp the upper and lower sides of a workpiece (500) to be processed, and a side pressure assembly (300) mounted between the upper die assembly (100) and the lower die assembly (200) and used for pressing the side wall of the workpiece (500) to be processed; The bottom of the lower die assembly (200) is provided with an extrusion member (210) for generating an upward extrusion force toward the workpiece (500) to be processed; The side pressure assembly (300) comprises: a side pusher (310) abutting against a side wall of a workpiece (500) to be processed, a side wall portion (320) arranged at the lower side of the side pusher (310) and used for pressing the end of the side wall of the workpiece (500) to be processed, and a side guide portion (330) arranged at a side of the side pusher (310) away from the workpiece (500) to be processed and used for moving the side pusher (310) toward the side of the workpiece (500) to be processed and cooperating with the lower mold assembly (200) to clamp the side wall of the workpiece (500) to be processed; A second driving device (400) is provided at the bottom of the side wall portion (320), a pushing member (340) is provided at the bottom of the side guide portion (330), and a plurality of protrusions (311) are provided at intervals on one side of the side pushing portion (310) abutting against the workpiece to be processed (500). Under the drive of the first driving device and the second driving device (400), the upper mold assembly (100) and the lower mold assembly (200) clamp the upper side and the lower side of the workpiece to be processed (500), and the protrusions (311) press the side wall of the workpiece to be processed (500) to avoid the side pressure assembly (300) directly rubbing against the side wall of the workpiece to be processed (500) to produce black marks.

2. The punching device for removing black marks and concave patterns according to claim 1, characterized in that: The protruding portion (311) comprises: a plane (3111) abutting against a side wall of the workpiece (500) to be processed, and a guiding inclined surface (3112) contacting an end of the side wall of the workpiece (500) to be processed.

3. The punching device for removing black marks and concave patterns according to claim 1, characterized in that: The lower mold assembly (200) is provided with a lower mold plate (220) in the side wall portion (320) for extruding the lower side of the workpiece (500) to be processed, and the upper mold assembly (100) is provided with an upper mold plate (110) in the side push portion (310) for extruding the upper side of the workpiece (500) to be processed and for clamping with the lower mold plate (220).

4. The punching device for removing black marks and concave patterns according to claim 3, characterized in that: The extrusion member (210) is a first nitrogen spring, the pushing member (340) is a second nitrogen spring, and the first nitrogen spring is assembled at the bottom of the lower template (220).

5. The punching device for removing black marks and concave patterns according to claim 3, characterized in that: The side pusher (310) comprises: a side close to the workpiece (500) provided with an avoidance groove (312) for avoiding the upper template (110), and a first inclined surface (313) provided on a side away from the workpiece (500).

6. The punching device for removing black marks and concave patterns according to claim 5, characterized in that: The side guide portion (330) is provided with a second inclined surface (331) on one side facing the side push portion (310), the second inclined surface (331) being in contact with the first inclined surface (313) and being arranged in parallel.

7. The punching device for removing black marks and concave patterns according to claim 3, characterized in that: The side wall portion (320) comprises: a fixing block (321) assembled at the bottom of the side push portion (310), and an extrusion block (322) detachably connected to a side close to the lower template (220); an extrusion protrusion (3221) for extruding the side wall end of the workpiece (500) to be processed is provided on the top of the extrusion block (322).

8. The punching device for removing black marks and concave patterns according to claim 3, characterized in that: The upper mold assembly (100) is provided with a first upper plate (120), a second upper plate (130) and a third upper plate (140) sleeved on the side pressure assembly (300) in sequence from top to bottom; The lower mold assembly (200) comprises: a first lower plate (230) arranged on a side close to a workpiece (500) to be processed, a second lower plate (240) arranged on the lower side of the first lower plate (230), and a third lower plate (250) for supporting the extrusion member (210) and the pushing member (340).

9. The punching device for removing black marks and concave patterns according to claim 8, characterized in that: The extrusion member (210) comprises: a first cylinder body (211) mounted on the third lower plate (250), and a first rod body (212) disposed on the upper side of the first cylinder body (211), penetrating the second upper plate (130), and connected to the lower side of the lower template (220); The pushing member (340) includes: a second cylinder body (341) assembled on the third lower plate (250), and a second rod body (342) arranged on the upper side of the second cylinder body (341), passing through the first lower plate (230) and the second lower plate (240), and connected to the lower side of the side guide part (330).

10. An application method of the punching device for removing black print concave patterns according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. placing the workpiece (500) to be processed on the lower die assembly (200), starting the first driving device to drive the upper die assembly (100) to move toward one side of the lower die assembly (200), so that the upper die assembly (100) and the lower die assembly (200) cooperate to clamp the workpiece (500) to be processed. At this time, under the action of the extrusion member (210) at the bottom of the lower die assembly (200), the extrusion member (210) applies an extrusion force upward, thereby increasing the clamping force of the upper die assembly (100) and the lower die assembly (200) to clamp the workpiece (500) to be processed; S11. The upper mold assembly (100) presses down the side pressure assembly (300), the side push portion (310) abuts against the side guide portion (330), and under the action of the pushing member (340), the side guide portion (330) moves toward the side of the workpiece (500) to be processed so that the side wall of the workpiece (500) is squeezed with the raised portion (311) of the side push portion (310), so as to reduce direct friction between the side wall of the workpiece (500) to be processed and the mold, and avoid black marks and concave lines caused by friction; S2. Start the second driving device (400), and the second driving device (400) drives the side wall portion (320) to press the side wall and the side wall end of the workpiece (500) to be processed, so as to increase the extrusion force on the side wall of the workpiece (500) to be processed.

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