Precious metal stamping device

Abstract

The invention relates to the technical field of metal machining equipment, in particular to a precious metal stamping device. A precious metal stamping device comprises a workbench, a lower die is arranged on the workbench, a spraying structure is arranged on the workbench, the spraying structure sprays gas or liquid to separate a machined part from the lower die, an avoiding hole is formed in the lower die, and an avoiding plate used for sealing the avoiding hole is arranged on the lower die. A driving piece used for driving the receding plate to slide in a reciprocating mode to be close to or away from the receding hole is arranged in the workbench, and the spraying structure part is used for being embedded into the receding hole. The stamping die has the following beneficial effects that the injection structure is embedded into the receding hole, the machined part and the lower die are separated through gas or liquid injected by the injection structure, the difficulty of separation of the machined part and the lower die after stamping is lowered, the labor intensity of workers is relieved, the damage probability of the machined part is lowered, the production efficiency is improved, and the quality of the machined part is improved.

Description

Technical Field

[0001] The present application relates to the technical field of metal processing equipment, and in particular to a precious metal stamping device. Background Art

[0002] Precious metal stamping devices are widely used in the field of precision manufacturing, such as the production of high-precision products such as jewelry and electronic components. With the continuous growth of market demand and technological progress, the requirements for precious metal stamping processes are becoming higher and higher. Traditional stamping equipment uses simple mechanical pressure to form metal sheets. Although it can meet basic needs, it still has shortcomings in terms of efficiency, high quality and automation.

[0003] In order to improve production efficiency and product quality, modern industry has put forward higher requirements for stamping devices, especially in terms of reducing scrap rate, extending mold life and improving operational safety. In the existing technology, in order to solve the above problems, the following methods are usually adopted: first, increase the hardness and wear resistance of the mold, and increase the service life of the mold by using higher-grade materials; second, optimize the stamping parameters, and reduce the occurrence of product deformation and cracks by accurately controlling factors such as stamping speed and pressure; third, introduce auxiliary systems, such as cooling systems and lubrication systems, to reduce mold temperature and friction, and further improve stamping quality and efficiency.

[0004] Although the above measures can solve the problem to a certain extent, after multiple stamping, the workpiece is prone to adhere to the lower die, making it difficult to remove the material. This not only increases the labor intensity of the workers, but may also cause damage to the workpiece, seriously affecting the production efficiency and quality of the workpiece. Summary of the invention

[0005] In order to reduce the difficulty of separating the workpiece and the lower mold after stamping, reduce the labor intensity of workers, reduce the probability of damage to the workpiece, improve production efficiency, and improve the quality of the workpiece, the present application provides a precious metal stamping device.

[0006] A precious metal stamping device provided in the present application adopts the following technical solution: it includes a workbench, a lower mold is arranged on the workbench, an injection structure is arranged on the workbench, the injection structure injects gas or liquid to separate the workpiece and the lower mold, an avoidance hole is opened on the lower mold, a giveway plate for sealing the avoidance hole is arranged on the lower mold, a driving member for driving the giveway plate to slide back and forth close to or away from the avoidance hole is arranged in the workbench, and the injection structure part is used to be embedded in the avoidance hole.

[0007] By adopting the above technical solution, the injection structure is embedded in the avoidance hole, and the gas or liquid injected by the injection structure separates the workpiece and the lower mold, thereby reducing the difficulty of separating the workpiece and the lower mold after stamping, reducing the labor intensity of workers, reducing the probability of damage to the workpiece, improving production efficiency, and improving product quality.

[0008] Preferably, the injection structure includes an injection head, a coolant supply tank and a connecting pipe. The coolant supply tank is arranged in the workbench and is used to store coolant. One end of the connecting pipe is connected to the coolant supply tank, and the other end of the connecting pipe is connected to the injection head. The injection head is used to be embedded in the avoidance hole, and the injection head faces the workpiece.

[0009] By adopting the above technical scheme, the coolant supply box supplies coolant to the injection head, and the injection head sprays the coolant to the workpiece through the avoidance hole. The impact force of the sprayed coolant separates the workpiece from the lower mold, thereby reducing the difficulty of workers separating the workpiece and the lower mold after stamping, reducing the labor intensity of workers, reducing the probability of damage to the workpiece, improving production efficiency, and improving the quality of the workpiece; and the coolant can cool the workpiece after stamping, further improving the quality of the workpiece.

[0010] Preferably, a coolant recovery chamber is provided in the workbench, a coolant recovery port is provided on the upper surface of the workbench, the coolant recovery port is located on one side of the lower mold, a baffle is provided on the upper surface of the workbench in a direction perpendicular to the upper surface of the workbench, the baffle is provided around the lower mold, and the coolant recovery port is communicated with the coolant recovery chamber.

[0011] By adopting the above technical solution, the purpose of opening the coolant recovery chamber and the coolant recovery port is to collect the sprayed coolant, reduce the waste of coolant, keep the stamping working environment clean, and reduce the burden of workers' cleaning.

[0012] Preferably, a first filter screen is arranged on the workbench, and the first filter screen is used to be filled in the coolant recovery port and to filter impurities in the coolant entering the coolant recovery chamber.

[0013] By adopting the above technical solution, the function of the first filter is to reduce the probability of large particles of impurities entering the coolant recovery chamber, to ensure the cleanliness of the coolant to a certain extent, to improve the recovery rate of the coolant, to reduce the waste rate of the coolant, and to save the environment.

[0014] Preferably, a purification box is provided on one side of the workbench, and a circulation pipe and a reflux pipe are connected to the purification box. The end of the circulation pipe away from the purification box is connected to the coolant recovery chamber, and the reflux pipe is connected to the bottom of the box wall on one side of the purification box. The end of the reflux pipe away from the purification box is connected to the coolant supply box. The purification box is used to filter impurities in the coolant. A reflux pump is provided on the purification box, and the reflux pump is used to pump the coolant after the impurities in the purification box are filtered out to the coolant supply tank.

[0015] By adopting the above technical solution, the coolant recovered in the coolant recovery chamber flows into the purification box through the circulation pipe, and the reflux pump is used to return the coolant after filtering impurities to the coolant supply tank. This design realizes the recycling of coolant and reduces production costs.

[0016] Preferably, a secondary filter is provided in the purification box, and the secondary filter is used to filter impurities in the coolant entering the purification box. A vibration structure is provided on the purification box, and the vibration structure is used to give vibration to the purification box.

[0017] By adopting the above technical solution, the secondary filter is used to filter impurities in the coolant entering the purification box, which can further remove fine impurities in the coolant and ensure the quality of the coolant. A vibration structure is provided on the purification box, which is used to give the purification box vibration to improve the filtering efficiency.

[0018] Preferably, the vibration structure includes a vibration box, a vibration motor and a vibration wheel, the vibration box is arranged on an outer wall of one side of the purification box, the vibration motor and the vibration wheel are arranged in the vibration box, the vibration wheel and the output shaft of the vibration motor are eccentrically connected, and the vibration motor drives the vibration wheel to swing back and forth to hit the inner wall of the vibration box.

[0019] By adopting the above technical solution, the vibration motor drives the vibration wheel to swing back and forth to hit the inner wall of the vibration box. In the process of hitting the vibration box, the vibration is given to the vibration box. The vibration is transmitted from the vibration box to the purification box, which can effectively vibrate the coolant in the purification box, help impurities to precipitate, improve the filtration efficiency, and improve the filtration effect.

[0020] Preferably, a dovetail block is provided at one end of the output shaft of the vibration motor, a dovetail groove is provided on the end surface of the vibration wheel close to the vibration motor, the length direction of the dovetail groove is opened along the radial direction of the vibration wheel, and the depth direction of the dovetail groove is opened along the axial direction of the vibration wheel, a plurality of adjustment holes are opened on the vibration wheel, the adjustment holes penetrate the bottom of the dovetail groove along the axial direction of the vibration wheel, and a plurality of adjustment holes are opened on the dovetail groove at equal intervals along the radial direction of the vibration wheel, the dovetail block and the vibration wheel are detachably connected by an adjusting bolt, and the adjusting bolt passes through the adjusting hole and is inserted into the dovetail block.

[0021] By adopting the above technical solution, such a design can change the center of gravity position of the vibration wheel by adjusting the position of the adjustment hole, thereby adjusting the vibration frequency and amplitude to adapt to the characteristics of different coolants.

[0022] Preferably, the purification box includes a purification box body and a purification box cover, the purification box body is open at the top, the purification box cover is used to seal the top opening of the purification box body, a limiting fixing piece is provided on one side wall of the purification box body, a limiting hole for embedding the limiting fixing piece is provided on the purification box cover, and the side of the purification box body away from the limiting fixing piece is rotatably connected to the purification box cover.

[0023] By adopting the above technical solution, the openable and closable setting of the purification box makes it easy for workers to disassemble and assemble the secondary filter, thereby extending the service life of the purification box.

[0024] Preferably, the limit fixing component includes a limit fixing block and a return spring, and a limit fixing groove for partially embedding the limit fixing component is opened on one side wall of the purification box, one end of the return spring is connected to the bottom of the limit fixing groove, and the other end of the return spring is connected to the limit fixing block, the limit fixing block is partially embedded in the limit fixing groove, and the limit fixing block is used to be embedded in the limit hole.

[0025] By adopting the above technical solution, when the limit fixing block contacts the purification box cover, the return spring is compressed and the limit fixing block is completely embedded in the limit fixing groove. When the limit fixing block is aligned with the limit hole, the rebound force of the return spring drives the limit fixing block to be embedded in the limit hole, so that the purification box body and the purification box cover are relatively fixed.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. The injection structure is embedded in the avoidance hole, and the gas or liquid injected by the injection structure separates the workpiece from the lower mold, reducing the difficulty of separating the workpiece from the lower mold after stamping, reducing the labor intensity of workers, reducing the probability of damage to the workpiece, improving production efficiency, and improving product quality; 2. The coolant supply box supplies coolant to the injection head, which sprays the coolant to the workpiece through the avoidance hole. The impact force of the sprayed coolant separates the workpiece from the lower mold, reducing the difficulty of workers separating the workpiece and the lower mold after stamping, reducing the labor intensity of workers, reducing the probability of damage to the workpiece, improving production efficiency, and improving the quality of the workpiece; and the coolant can cool the workpiece after stamping, further improving the quality of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of this application; Figure 2 It is a cross-sectional schematic diagram of the overall structure of the present application; Figure 3 yes Figure 2 A partial enlarged schematic diagram of part A; Figure 4 is a cross-sectional schematic diagram of the overall structure of the present application from another perspective; Figure 5 It is a cross-sectional schematic diagram of a part of the structure of the present application; Figure 6 yes Figure 5 A partial enlarged schematic diagram of part A; Figure 7 It is an exploded schematic diagram of a part of the structure of the present application.

[0028] Description of reference numerals: 110, workbench; 111, lower die; 112, L-shaped mounting frame; 113, upper die; 114, stamping cylinder; 115, avoidance hole; 116, driving member; 117, elastic membrane; 118, baffle; 119, first filter; 120, injection structure; 121, injection head; 122, coolant supply tank; 123, connecting pipe; 124, top platform; 125, tilting plate; 126, tightening spring; 127, give way plate; 130, coolant recovery chamber; 131, coolant recovery port; 140, Purification box; 141. Purification box body; 142. Purification box cover; 143. Circulation pipe; 144. Return pipe; 145. Return pump; 146. Secondary filter; 147. Mounting plate; 148. Fixing bolt; 150. Limit fixing piece; 151. Limit fixing block; 152. Return spring; 153. Limit hole; 154. Limit fixing groove; 160. Vibration structure; 161. Vibration box; 162. Vibration motor; 163. Vibration wheel; 164. Dovetail block; 165. Dovetail groove; 166. Adjustment hole; 167. Adjustment bolt. DETAILED DESCRIPTION

[0029] The present application is further described in detail below in conjunction with the accompanying drawings.

[0030] The present application discloses a precious metal stamping device, which is used to reduce the difficulty of separating the workpiece and the lower mold 111 after stamping, reduce the labor intensity of workers, reduce the probability of damage to the workpiece, improve production efficiency, and improve the quality of the workpiece.

[0031] refer to Figure 1 , Figure 2 A precious metal stamping device includes a workbench 110, on which a lower die 111 is arranged. In the present embodiment, the lower die 111 is arranged at the center of the upper surface of the workbench 110, and an L-shaped mounting frame 112 and an upper die 113 are also arranged on the workbench 110. One end of the L-shaped mounting frame 112 is connected to the upper surface of the workbench 110, and the other end of the L-shaped mounting frame 112 extends to directly above the lower die 111. A stamping cylinder 114 is vertically penetrated on the L-shaped mounting frame 112, and a piston rod of the stamping cylinder 114 is connected to the upper die 113. The workpiece is placed between the upper die 113 and the lower die 111 for stamping processing.

[0032] refer to Figure 2 , Figure 3 and Figure 4 After multiple stampings, the workpiece is easily adhered to the lower die 111, which makes it difficult to remove the material, which not only increases the labor intensity of the workers, but also may cause damage to the workpiece, seriously affecting the production efficiency and quality of the workpiece. Therefore, a spray structure 120 is provided on the workbench 110, and the spray structure 120 sprays gas or liquid to separate the workpiece and the lower die 111. The lower die 111 is provided with an avoidance hole 115, and the lower die 111 is provided with a yield plate 127 for sealing the avoidance hole 115. A driving member 116 is provided in the workbench 110 for driving the give way plate 127 to slide back and forth toward or away from the avoidance hole 115. The injection structure 120 is partially used to be embedded in the avoidance hole 115. The injection structure 120 is embedded in the avoidance hole 115. The gas or liquid injected by the injection structure 120 separates the workpiece and the lower mold 111, thereby reducing the difficulty of separating the workpiece and the lower mold 111 after stamping, reducing the labor intensity of workers, reducing the probability of damage to the workpiece, improving production efficiency, and improving product quality.

[0033] Specifically, an elastic resistance membrane 117 is provided on the lower mold 111, and the elastic resistance membrane 117 seals the avoidance hole 115. The upper surface of the elastic resistance membrane 117 is flush with the upper surface of the lower mold 111. In this embodiment, the driving member 116 is a give-way cylinder, which is provided on the injection structure 120. The give-way cylinder is vertically arranged, and the piston rod of the give-way cylinder is connected to the lower surface of the give-way plate 127. The give-way cylinder drives the give-way plate 127 to slide upward in the vertical direction until the upper surface of the give-way plate 127 fits with the elastic resistance membrane 117.

[0034] The spray structure 120 includes a spray head 121, a coolant supply tank 122 and a connecting pipe 123. The coolant supply tank 122 is arranged in the workbench 110 and is used to store coolant in the coolant supply tank 122. One end of the connecting pipe 123 is connected to the coolant supply tank 122, and the other end of the connecting pipe 123 is connected to the spray head 121. The spray head 121 is used to be embedded in the avoidance hole 115. The spray head 121 faces the workpiece. The coolant supply tank 122 supplies coolant to the spray head 121. The spray head 121 sprays the coolant to the workpiece through the avoidance hole 115. The impact force of the sprayed coolant separates the workpiece from the lower mold 111, reducing the difficulty of workers separating the workpiece and the lower mold 111 after stamping, reducing the labor intensity of workers, reducing the probability of damage to the workpiece, improving production efficiency, and improving the quality of the workpiece; and the coolant can cool the workpiece after stamping, further improving the quality of the workpiece.

[0035] Furthermore, a coolant recovery chamber 130 is provided in the workbench 110, and a coolant recovery port 131 is provided on the upper surface of the workbench 110. The coolant recovery port 131 is located on one side of the lower mold 111, and the coolant recovery port 131 is connected to the coolant recovery chamber 130. The purpose of opening the coolant recovery chamber 130 and the coolant recovery port 131 is to collect the ejected coolant, reduce the waste of coolant, keep the stamping working environment clean, and reduce the burden of workers cleaning. In this embodiment, the coolant supply The box 122 is arranged in the coolant recovery chamber 130, and the top of the coolant supply box 122 is spliced ​​by a top platform 124 and four inclined plates 125. The top platform 124 is arranged horizontally, and the give-way cylinder is arranged on the top platform 124, and two clamping springs 126 are arranged on the top platform 124. The two clamping springs 126 are symmetrically arranged on both sides of the give-way cylinder, and the axial direction of the clamping spring 126 is arranged along the vertical direction, and the end of the clamping spring 126 away from the top platform 124 is connected to the lower surface of the give-way plate 127.

[0036] In addition, in order to further reduce the burden of workers' cleaning, a baffle 118 is arranged on the upper surface of the workbench 110 in a direction perpendicular to the upper surface of the workbench 110. In the present embodiment, there are four baffles 118 in total, and the four baffles 118 are connected and spliced ​​at the ends and arranged around the lower mold 111, and a first filter 119 is arranged on the workbench 110. The first filter 119 is used to be filled in the coolant recovery port 131 and to filter impurities in the coolant entering the coolant recovery chamber 130, thereby reducing the probability of large particles of impurities entering the coolant recovery chamber 130, ensuring the cleanliness of the coolant to a certain extent, improving the recovery rate of the coolant, reducing the waste rate of the coolant, and saving the environment.

[0037] Further, refer to Figure 1 and Figure 2 A purification box 140 is provided on one side of the workbench 110, and a circulation pipe 143 and a return pipe 144 are connected to the purification box 140. The end of the circulation pipe 143 away from the purification box 140 is connected to the coolant recovery chamber 130, and the return pipe 144 is connected to the bottom of the box wall on one side of the purification box 140. The end of the return pipe 144 away from the purification box 140 is connected to the coolant supply box 122. The purification box 140 is used to filter impurities in the coolant. A reflux pump 145 is provided on the purification box 140. The reflux pump 145 is used to pump the coolant after the impurities are filtered out in the purification box 140 into the coolant supply box 122. The coolant recovered in the coolant recovery chamber 130 flows into the purification box 140 through the circulation pipe 143. The reflux pump 145 is used to return the coolant after the impurities are filtered out to the coolant supply box 122. This design realizes the recycling of the coolant and reduces the production cost.

[0038] A secondary filter 146 is provided in the purification box 140. The secondary filter 146 is used to filter impurities in the coolant entering the purification box 140, and can further remove fine impurities in the coolant to ensure the quality of the coolant. In this embodiment, the secondary filter 146 is detachably provided, and mounting plates 147 are provided on the four sides of the secondary filter 146. The mounting plates 147 are vertically arranged on the secondary filter 146, and fixing bolts 148 are passed through the mounting plates 147 and then passed through the inner wall of the purification box 140.

[0039] refer to Figure 1 , Figure 2 and Figure 5 In order to facilitate the disassembly and assembly of the secondary filter 146, the purification box 140 can be opened and closed. The purification box 140 includes a purification box body 141 and a purification box cover 142. The purification box body 141 is open at the top, and the purification box cover 142 is used to seal the open top of the purification box body 141.

[0040] refer to Figure 5 and Figure 6A limiting fixing member 150 is provided on one side of the purification box 141, and a limiting hole 153 for the limiting fixing member 150 to be embedded is provided on the purification box cover 142. The side of the purification box 141 away from the limiting fixing member 150 is rotatably connected to the purification box cover 142. Specifically, the limiting fixing member 150 includes a limiting fixing block 151 and a return spring 152. A limiting fixing groove 154 for partially embedding the limiting fixing member 150 is provided on one side of the purification box 140. The return spring 152 is provided on the side of the purification box 140. One end of the return spring 152 is connected to the bottom of the limiting fixing groove 154, and the other end of the return spring 152 is connected to the limiting fixing block 151. The limiting fixing block 151 is partially embedded in the limiting fixing groove 154. The limiting fixing block 151 is used to be embedded in the limiting hole 153. In this embodiment, there are two groups of limiting fixing members 150. Correspondingly, two limiting holes 153 are opened on the purification box cover 142. The purification box cover 142 is L-shaped, and the limiting holes 153 are opened at the short side of the purification box cover 142.

[0041] In addition, reference Figure 1 , Figure 5 and Figure 7 In order to improve the filtering efficiency, a vibration structure 160 is provided on the purification box 140. The vibration structure 160 is used to give the purification box 140 vibration. The vibration structure 160 includes a vibration box 161, a vibration motor 162 and a vibration wheel 163. The vibration box 161 is arranged on one side outer wall of the purification box 140, and the vibration motor 162 and the vibration wheel 163 are arranged in the vibration box 161. The output shafts of the vibration wheel 163 and the vibration motor 162 are eccentrically connected. The vibration motor 162 drives the vibration wheel 163 to swing back and forth to hit the inner wall of the vibration box 161. In the process of hitting the vibration box, the vibration box 161 is given vibration. The vibration is transmitted from the vibration box 161 to the purification box 140, which can effectively vibrate the coolant in the purification box 140, help impurities to precipitate, improve the filtering efficiency, and improve the filtering effect.

[0042] Specifically, a dovetail block 164 is provided at one end of the output shaft of the vibration motor 162, and a dovetail groove 165 is provided on the end surface of the vibration wheel 163 close to the vibration motor 162. The length direction of the dovetail groove 165 is opened along the radial direction of the vibration wheel 163, and the depth direction of the dovetail groove 165 is opened along the axial direction of the vibration wheel 163. A plurality of adjustment holes 166 are opened on the vibration wheel 163, and the adjustment hole 166 passes through the bottom of the dovetail groove 165 along the axial direction of the vibration wheel 163. A plurality of adjustment holes 166 are opened on the dovetail groove 165 at equal intervals along the radial direction of the vibration wheel 163. The dovetail block 164 and the vibration wheel 163 are detachably connected by an adjusting bolt 167, and the adjusting bolt 167 passes through the adjusting hole 166 and is inserted into the dovetail block 164. Such a design can change the center of gravity position of the vibration wheel 163 by adjusting the position of the adjusting hole 166, thereby adjusting the vibration frequency and amplitude to adapt to the characteristics of different coolants. The implementation principle of a precious metal stamping device in an embodiment of the present application is as follows: by arranging a spray structure 120 on the workbench 110, the impact force of the coolant is used to separate the workpiece from the lower mold 111, which greatly reduces the workload of manual material collection, reduces the labor intensity of workers, reduces the probability of damage to the workpiece, improves production efficiency, and improves the quality of the workpiece; and the coolant can cool the workpiece after stamping, further improving the quality of the workpiece; at the same time, by arranging a coolant recovery chamber 130 and a purification box 140, the recycling of the coolant is realized, the waste of the coolant is reduced, the recycling rate of the coolant is improved, and the cleanliness of the stamping work environment is kept, reducing the burden of workers on cleaning; in addition, the design of the vibration structure 160 further improves the filtering effect of the coolant, ensures the quality of the coolant, and the entire device has a compact structure, is easy to operate, and has a high practical value.

[0043] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A precious metal stamping device, comprising a workbench (110), wherein a lower die (111) is arranged on the workbench (110), characterized in that: The workbench (110) is provided with a spray structure (120), and the spray structure (120) sprays gas or liquid to separate the workpiece and the lower mold (111). The lower mold (111) is provided with a avoidance hole (115), and the lower mold (111) is provided with a clearance plate (127) for sealing the avoidance hole (115). The workbench (110) is provided with a driving member (116) for driving the clearance plate (127) to slide back and forth toward or away from the avoidance hole (115), and a part of the spray structure (120) is used to be embedded in the avoidance hole (115).

2. A precious metal stamping device according to claim 1, characterized in that: The spray structure (120) comprises a spray head (121), a coolant supply box (122) and a connecting pipe (123); the coolant supply box (122) is arranged in the workbench (110) and is used to store coolant in the coolant supply box (122); one end of the connecting pipe (123) is connected to the coolant supply box (122); the other end of the connecting pipe (123) is connected to the spray head (121); the spray head (121) is used to be embedded in the avoidance hole (115); and the spray head (121) faces the workpiece.

3. A precious metal stamping device according to claim 2, characterized in that: A coolant recovery chamber (130) is provided in the workbench (110), a coolant recovery port (131) is provided on the upper surface of the workbench (110), the coolant recovery port (131) is located on one side of the lower mold (111), a baffle (118) is provided on the upper surface of the workbench (110) in a direction perpendicular to the upper surface of the workbench (110), the baffle (118) is provided around the lower mold (111), and the coolant recovery port (131) is communicated with the coolant recovery chamber (130).

4. A precious metal stamping device according to claim 3, characterized in that: A first filter screen (119) is provided on the workbench (110), and the first filter screen (119) is used to be filled in the coolant recovery port (131) and to filter impurities in the coolant entering the coolant recovery chamber (130).

5. A precious metal stamping device according to claim 3, characterized in that: A purification box (140) is provided on one side of the workbench (110). A circulation pipe (143) and a return pipe (144) are connected to the purification box (140). One end of the circulation pipe (143) away from the purification box (140) is connected to the coolant recovery chamber (130). The return pipe (144) is connected to the bottom of a box wall on one side of the purification box (140). One end of the return pipe (144) away from the purification box (140) is connected to the coolant supply box (122). The purification box (140) is used to filter impurities in the coolant. A return pump (145) is provided on the purification box (140). The return pump (145) is used to pump the coolant after the impurities are filtered out in the purification box (140) into the coolant supply box (122).

6. A precious metal stamping device according to claim 5, characterized in that: A secondary filter (146) is provided in the purification box (140), and the secondary filter (146) is used to filter impurities in the coolant entering the purification box (140). A vibration structure (160) is provided on the purification box (140), and the vibration structure (160) is used to give vibration to the purification box (140).

7. A precious metal stamping device according to claim 6, characterized in that: The vibration structure (160) comprises a vibration box (161), a vibration motor (162) and a vibration wheel (163); the vibration box (161) is arranged on an outer wall of one side of the purification box (140); the vibration motor (162) and the vibration wheel (163) are arranged in the vibration box (161); the vibration wheel (163) and the output shaft of the vibration motor (162) are eccentrically connected; the vibration motor (162) drives the vibration wheel (163) to swing back and forth to strike the inner wall of the vibration box (161).

8. A precious metal stamping device according to claim 7, characterized in that: A dovetail block (164) is provided at one end of the output shaft of the vibration motor (162); a dovetail groove (165) is provided on an end surface of the vibration wheel (163) close to the vibration motor (162); the length direction of the dovetail groove (165) is provided along the radial direction of the vibration wheel (163); the depth direction of the dovetail groove (165) is provided along the axial direction of the vibration wheel (163); a plurality of adjustment holes (166) are provided on the vibration wheel (163); An adjustment hole (166) penetrates the bottom of the dovetail groove (165) along the axial direction of the vibration wheel (163); a plurality of the adjustment holes (166) are arranged on the dovetail groove (165) at equal intervals along the radial direction of the vibration wheel (163); the dovetail block (164) and the vibration wheel (163) are detachably connected via an adjustment bolt (167); the adjustment bolt (167) passes through the adjustment hole (166) and is inserted into the dovetail block (164).

9. A precious metal stamping device according to claim 5, characterized in that: The purification box (140) comprises a purification box body (141) and a purification box cover (142); the purification box body (141) is open at the top; the purification box cover (142) is used to seal the open top of the purification box body (141); a limiting fixing piece (150) is provided on one side of the box wall of the purification box body (141); a limiting hole (153) for the limiting fixing piece (150) to be embedded is provided on the purification box cover (142); and a side of the purification box body (141) away from the limiting fixing piece (150) is rotatably connected to the purification box cover (142).

10. A precious metal stamping device according to claim 9, characterized in that: The limiting fixing component (150) comprises a limiting fixing block (151) and a return spring (152); a limiting fixing groove (154) for partially embedding the limiting fixing component (150) is provided on one side wall of the purification box (140); one end of the return spring (152) is connected to the bottom of the limiting fixing groove (154); the other end of the return spring (152) is connected to the limiting fixing block (151); the limiting fixing block (151) is partially embedded in the limiting fixing groove (154); and the limiting fixing block (151) is used to be embedded in the limiting hole (153).

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