Automatic waste discharging device of automobile stamping die

Abstract

The invention relates to the technical field of stamping, in particular to an automatic waste discharging device of an automobile stamping die, which is mounted on a workbench and comprises a lower die arranged at the top end of the workbench, an upper die is arranged right above the lower die, two discharging assemblies are arranged on the front side and the rear side of the workbench, and the two discharging assemblies are symmetrically arranged front and back. The discharging assembly comprises two supporting plates in bilateral symmetry, the sides, facing the workbench, of the supporting plates make contact with the workbench, negative pressure channels are fixedly arranged at the top ends of the supporting plates, and strip-shaped filter screens are embedded in the sides, facing the workbench, of the negative pressure channels. The negative pressure assembly is controlled by the upper die to generate negative pressure, so that the discharging assembly can adsorb waste materials to the top end of the supporting plate and then pour the waste materials into the collecting box, the waste material discharging mode does not need to suck the waste materials into the negative pressure device, the negative pressure device is prevented from being damaged, the failure rate of related equipment during waste material discharging is reduced, and the production efficiency is improved. And the cost of discharging the waste materials is further reduced.

Description

Technical Field

[0001] This invention relates to the field of stamping technology, and in particular to an automatic waste removal device for automotive stamping dies. Background Technology

[0002] Stamping is a common processing method in the automotive manufacturing industry. It involves placing raw materials between two halves of a mold, applying external force to the mold, and then squeezing the raw materials to deform them into the shape corresponding to the mold, thus producing the corresponding workpiece.

[0003] In actual production, to ensure that the workpiece can fully fill the mold cavity and avoid forming defects such as insufficient material and cracks, technicians will reserve a 5%-15% process allowance when designing the blank size, depending on the complexity of the workpiece. This inevitably results in an excess metal portion around the workpiece after processing, i.e., stamping scrap. After the stamping process, this scrap will automatically separate from the workpiece through the ejection mechanism on the mold and then scatter on the worktable of the stamping machine. If this scrap accumulates around the mold for a long time, it will not only affect the positioning accuracy of the blank in the next stamping, causing workpiece size deviation, but may also be squeezed into the mold cavity during the mold closing process, causing scratches or damage to the mold surface. In severe cases, it may even cause stamping machine failure and affect production efficiency. Therefore, stamping scrap needs to be cleaned up and recycled.

[0004] Automotive stamping workshops typically employ negative pressure systems for real-time waste material recovery. These systems, connected via pipes to suction vents around the molds, use the suction generated by the negative pressure to draw waste into a collection bin, automating waste removal. However, because the waste is often made of metal with sharp edges, the high-speed flow of the waste during its entry into the pipes causes frequent friction and collisions with the pipe walls, easily leading to wear and blockages. In the long run, this wear and blockage increase the failure rate and maintenance frequency of the negative pressure recovery system, ultimately raising the cost of discharging stamping waste. Summary of the Invention

[0005] To address the problem mentioned in the background art that waste materials are easily worn or scratched during the recycling process, thus increasing the cost of waste discharge, the present invention provides the following technical solution:

[0006] An automatic waste removal device for automotive stamping dies is installed on a workbench. It includes a lower die at the top of the workbench and an upper die directly above the lower die. Discharge components are provided on both the front and rear sides of the workbench, and the two discharge components are symmetrically arranged. Each discharge component includes two symmetrical support plates. In a horizontal state, one end of the two support plates is in contact with each other, and the top of the support plates is flush with the top of the workbench. The side of the support plate facing the workbench is in contact with the workbench. A negative pressure channel is fixedly provided at the top of the support plate, and a strip filter screen is embedded in the side of the negative pressure channel facing the workbench.

[0007] A duct pipe with a one-way valve is fixedly installed on one side of the negative pressure channel. A negative pressure component is installed at one end of the duct pipe, and an adjusting rod is fixedly installed at the other end of the support plate. A winding wheel is fixedly installed at one end of the adjusting rod. The duct pipe communicates with the inside of the support plate. A tension belt is fixedly installed at the outer end of the winding wheel. The tension belt is wound around the outer end of the winding wheel, and one end of the tension belt can be pulled when the upper mold moves upward.

[0008] Furthermore, the upper mold is provided with two detachable fixed crossbeams on both sides, for a total of four fixed crossbeams. The two discharge components have a total of four tension bands, and the tops of the four tension bands are respectively connected to the four fixed crossbeams.

[0009] Furthermore, the outer end of the adjusting rod is rotatably connected to a mounting plate, the adjusting rod passes through the mounting plate, the mounting plate is detachably connected to the outer end of the workbench, the mounting plate is provided with a torsion spring on the side facing the corresponding support plate, the torsion spring is sleeved on the outer end of the adjusting rod, one end of the torsion spring is provided with an annular protrusion, the annular protrusion is fixedly provided on the outer end of the adjusting rod.

[0010] Furthermore, a collection box is provided below each of the two discharge components. The collection box is placed on the ground. A removable filter screen is provided on the inner wall of the collection box. Multiple blocking rods are provided on the filter screen, which can be detached from the filter screen. Two removable sealing plugs are provided on the front side of the collection box, which are located below the filter screen. The collection box is filled with water, and the water level is higher than the top of the blocking rods.

[0011] Furthermore, the negative pressure assembly includes a negative pressure cylinder. In use, the negative pressure cylinder needs to be fixed on the ground. The other end of the air guide pipe is fixedly connected to the corresponding negative pressure cylinder and communicates with the inside of the negative pressure cylinder. The top of the negative pressure cylinder is provided with a detachable cover plate. The cover plate is provided with a hollow upright rod that penetrates the cover plate. There are a total of four negative pressure assemblies, that is, a total of four hollow upright rods. The four hollow upright rods correspond to four fixed crossbeams respectively.

[0012] Furthermore, a piston plate is provided inside the negative pressure cylinder, and a sealing ring is fixedly provided at the outer end of the piston plate. The outer end of the sealing ring is in contact with the inner wall of the negative pressure cylinder. The bottom end of the hollow upright extends into the inside of the negative pressure cylinder and penetrates the piston plate. A one-way valve is fixedly provided on the hollow upright, and the one-way valve is located inside the negative pressure cylinder.

[0013] Furthermore, the hollow upright has a vent hole at its outer end, and the internal cavity of the hollow upright is connected to the outside through the vent hole. The vent hole is always located above the cover plate. A limiting ring is provided on the inner wall of the negative pressure cylinder, the piston plate is located above the limiting ring, and the connection between the air guide pipe and the negative pressure cylinder is located below the limiting ring.

[0014] Furthermore, a fixing ring is fixedly provided at the outer end of the hollow upright, the fixing ring is located above the vent hole, a spring is fixedly provided at the top of the fixing ring, the spring is sleeved on the outer end of the hollow upright, a top plate is fixedly provided at the top of the spring, and the top plate is detachably connected to the corresponding fixing beam.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. By connecting the discharge assembly and the negative pressure assembly to the fixed crossbeam, and the fixed crossbeam is installed and fixed on the upper mold, the fixed crossbeam moves up and down synchronously with the upper mold. Therefore, while the upper mold moves up and down to perform the stamping work, the discharge assembly and the negative pressure assembly are automatically driven to run and perform the waste discharge work. The upper mold, the discharge assembly, and the negative pressure assembly work together and can run automatically without an additional power source, making the cleaning and collection of waste more energy-efficient and convenient.

[0017] 2. While the upper mold moves upward, the negative pressure component is controlled to generate negative pressure, which allows the discharge component to absorb the waste material to the top of the tray. Then, the negative pressure of the negative pressure component is controlled to disappear and the tray is driven to tilt, pouring the waste material into the collection box. Although this waste discharge method also utilizes negative pressure, it does not require the waste material to be sucked into the negative pressure device. This effectively avoids the wear and blockage problems caused by sharp waste material to the inside of the negative pressure device in the existing technology, thereby effectively reducing the causes of failure of the negative pressure component and thus effectively reducing the cost of waste discharge. Attached Figure Description

[0018] Figure 1 This is a front view of the working state of the present invention;

[0019] Figure 2 This is a structural diagram of the workbench, material discharge assembly, and negative pressure assembly of the present invention;

[0020] Figure 3 This is a front view structural diagram of the material discharge assembly of the present invention;

[0021] Figure 4This is a rear view of the material discharge assembly of the present invention;

[0022] Figure 5 This is a side sectional view of the negative pressure channel of the present invention;

[0023] Figure 6 This is a structural diagram of the negative pressure component of the present invention;

[0024] Figure 7 This is a cross-sectional view of the negative pressure component of the present invention;

[0025] Figure 8 For the present invention Figure 7 Enlarged view of section A in the middle;

[0026] Figure 9 This is a structural diagram of the internal structure of the collection box of the present invention.

[0027] The following is a list of component names represented by the reference numerals in the attached figures:

[0028] 1. Workbench; 101. Lower mold; 102. Upper mold; 2. Discharge assembly; 201. Support plate; 202. Negative pressure channel; 203. Adjusting rod; 204. Mounting plate; 205. Torsion spring; 206. Winding wheel; 207. Tension belt; 208. Strip filter screen;

[0029] 3. Negative pressure assembly; 301. Negative pressure cylinder; 302. Cover plate; 303. Hollow upright; 304. Spring; 305. Fixing ring; 306. Top plate; 307. Vent hole; 308. Piston plate;

[0030] 4. Fixed crossbeam; 5. Collection box; 501. Filter screen; 502. Blocking bar; 6. Air guide pipe. Detailed Implementation

[0031] The preferred embodiments of the present invention are described in detail below, and a clear and complete description is provided in conjunction with the accompanying drawings.

[0032] Please see Figures 1-9 This invention provides an automatic waste removal device for automotive stamping dies, installed on a workbench 1. It includes a lower die 101 at the top of the workbench 1, an upper die 102 directly above the lower die 101, and discharge components 2 on both the front and rear sides of the workbench 1. The two discharge components 2 are symmetrically arranged. Each discharge component 2 includes two symmetrical support plates 201. In a horizontal state, one end of the two support plates 201 contacts each other, and the top of the support plates 201 is flush with the top of the workbench 1. The side of the support plates 201 facing the workbench 1 contacts the workbench 1. A negative pressure channel 202 is fixedly provided at the top of the support plate 201, and a strip filter screen 208 is embedded in the side of the negative pressure channel 202 facing the workbench 1.

[0033] The automotive stamping parts are processed on the worktable 1. During processing, the upper die 102 moves down and squeezes the raw material between the lower die 101 and the upper die 102, so that the raw material is formed into automotive parts. The excess waste material at the edge of the automotive parts is cut off and falls to the top of the worktable 1, forming waste material.

[0034] A vent pipe 6 with a one-way valve is fixedly provided on one side of the negative pressure channel 202. A negative pressure component 3 is provided at one end of the vent pipe 6. An adjusting rod 203 is fixedly provided at the other end of the support plate 201. A winding wheel 206 is fixedly provided at one end of the adjusting rod 203. The vent pipe 6 communicates with the interior of the support plate 201. A tension band 207 is fixedly provided at the outer end of the winding wheel 206. The tension band 207 is wound around the outer end of the winding wheel 206. One end of the tension band 207 can be pulled when the upper mold 102 moves upward.

[0035] The upper mold 102 is provided with two detachable fixed crossbeams 4 on both sides, and there are a total of four fixed crossbeams 4. The two discharge components 2 have a total of four tension bands 207, and the tops of the four tension bands 207 are respectively connected to the four fixed crossbeams 4.

[0036] During the processing, the positions of the workbench 1 and the lower mold 101 remain fixed, while the upper mold 102 moves up and down continuously. When the upper mold 102 moves upward, the fixed crossbeams 4 on both sides of it move upward as well. During the upward movement, the fixed crossbeams 4 control the negative pressure component 3, causing the negative pressure component 3 to generate negative pressure. The negative pressure component 3 is connected to the negative pressure channel 202 through the air guide pipe 6. Therefore, negative pressure is generated inside the negative pressure channel 202. Under the action of negative pressure, suction is generated towards the strip filter 208 of the workbench 1. The strip filter 208 plays a filtering role, so waste will not enter the negative pressure channel 202.

[0037] As the upper mold 102 moves further upward, the negative pressure of the negative pressure component 3 disappears, and the suction at the strip filter screen 208 also disappears, causing the adsorbed waste to fall onto the top of the tray 201. Then, as the upper mold 102 moves further upward, the fixed crossbeam 4 pulls the tension band 207. That is to say, although the tension band 207 is initially pulled with the upward movement of the fixed crossbeam 4, it is not taut. Only after the fixed crossbeam 4 moves upward to a certain extent is the tension band 207 taut. After the taut tension band 207 is pulled, it drives the winding wheel 206 to rotate, which in turn drives the adjusting rod 203 to rotate. The adjusting rod 203 drives the tray 201 to rotate, causing the tray 201 to tilt. The same discharge component 2 In the process, a gap is created at the contact point of the two pallets 201. Under the action of gravity, the waste slides along the inclined pallets 201 towards the gap and eventually falls out of the gap, completing the cleaning and collection of the waste. This cleaning and collection method is driven by the up-and-down moving upper mold 102 and can be carried out automatically without an additional power source, making the cleaning and collection of waste more energy-efficient and convenient. Although this waste discharge method also utilizes negative pressure, it does not require the waste to be sucked into the negative pressure device. Therefore, sharp waste will not scratch or block the inside of the negative pressure device, avoiding damage to the negative pressure device and reducing the failure rate of related equipment during waste discharge, thereby reducing the cost of waste discharge.

[0038] To return pallet 201 to its original position, as follows: Figure 3 and Figure 4 As shown, the outer end of the adjusting rod 203 is rotatably connected to the mounting plate 204, and the adjusting rod 203 passes through the mounting plate 204. The mounting plate 204 is detachably connected to the outer end of the workbench 1. The material discharge assembly 2 is installed on the workbench 1 as a whole through the mounting plate 204. A torsion spring 205 is provided on the side of the mounting plate 204 facing the corresponding support plate 201. The torsion spring 205 is sleeved on the outer end of the adjusting rod 203. One end of the torsion spring 205 is provided with an annular protrusion, which is fixedly provided on the outer end of the adjusting rod 203.

[0039] When there is no force, the pallet 201 remains horizontal. The torsion spring 205 maintains the horizontal state of the pallet 201 by its own elasticity. When the fixed crossbeam 4 pulls the tension band 207 and causes the adjusting rod 203 to rotate, the torsion spring 205 rotates and tightens accordingly. When the upper mold 102 and the fixed crossbeam 4 move down, the tension band 207 is no longer pulled. The elasticity of the torsion spring 205 is released and drives the adjusting rod 203 to rotate back, which in turn drives the pallet 201 to rotate back to the horizontal state. The winding wheel 206 is also driven to rotate and rewinds the pulled-out tension band 207.

[0040] Waste material sliding off the discharge assembly 2 needs to be properly handled, such as... Figure 1 , Figure 9As shown, a collection box 5 is provided below each of the two discharge components 2. The collection box 5 is placed on the ground. A detachable filter screen plate 501 is provided on the inner wall of the collection box 5. Multiple blocking rods 502 are provided on the filter screen plate 501, which can be detached from the filter screen plate 501. Two detachable sealing plugs are provided on the front side of the collection box 5. The sealing plugs are located below the filter screen plate 501. The collection box 5 is filled with water, and the water level is higher than the top of the blocking rods 502.

[0041] A suitable amount of water is injected into the collection box 5, ensuring the water level covers the baffle bars 502. The collection box 5 is located directly below the discharge assembly 2. Waste falling from the top of the pallet 201 naturally falls into the collection box 5. The waste falls into the water, which cleans the waste and also acts as a buffer, preventing the falling waste from impacting the collection box 5 and causing damage. In this way, the collection box 5 is used to collect waste for reuse, saving production costs. Under the action of gravity, the waste falls between the baffle bars 502 inside the collection box 5. The gaps between the densely arranged baffles 502 are narrow, allowing flaky waste to enter while preventing human hands from entering. This prevents hands from reaching into the collection box 5 and coming into contact with the waste, thus avoiding hand injuries. When removing the waste, the sealing plug is removed, and the water in the collection box 5 will drain out through the drain outlet, which is located below the filter screen 501. As the water is drained, the filter screen 501 filters the waste, leaving it in the collection box 5. Finally, the waste can be poured out.

[0042] Similarly, the operation of the negative pressure component 3 is controlled by raising and lowering the upper mold 102, such as... Figure 2 , Figure 6 , Figure 7 As shown, the negative pressure component 3 includes a negative pressure cylinder 301. In use, the negative pressure cylinder 301 needs to be fixed on the ground. The other end of the air guide pipe 6 is fixedly connected to the corresponding negative pressure cylinder 301 and communicates with the inside of the negative pressure cylinder 301. The top of the negative pressure cylinder 301 is provided with a detachable cover plate 302. The cover plate 302 can prevent dust from entering the negative pressure cylinder 301, but the top opening of the negative pressure cylinder 301 is not completely sealed by the cover plate 302. The cover plate 302 is provided with a hollow upright 303 that penetrates the cover plate 302. There are four negative pressure components 3, that is, there are four hollow upright 303. The four hollow upright 303 correspond to four fixed crossbeams 4 respectively.

[0043] The negative pressure cylinder 301 is provided with a piston plate 308 inside. A sealing ring is fixedly provided at the outer end of the piston plate 308. The outer end of the sealing ring is in contact with the inner wall of the negative pressure cylinder 301. The bottom end of the hollow upright rod 303 extends into the negative pressure cylinder 301 and passes through the piston plate 308. A one-way valve is fixedly provided on the hollow upright rod 303. The one-way valve is located inside the negative pressure cylinder 301.

[0044] When the upper mold 102 moves upward, the fixed crossbeam 4 moves upward synchronously with it. When the fixed crossbeam 4 moves upward, it pulls the hollow upright 303 upward. During the upward movement, the hollow upright 303 pulls the piston plate 308 upward inside the negative pressure cylinder 301. As the piston plate 308 moves upward, the space below it increases, thereby reducing the air pressure and generating negative pressure. The negative pressure cylinder 301 is connected to the negative pressure channel 202 through the air guide pipe 6. Therefore, negative pressure is also generated inside the negative pressure channel 202, thereby generating suction to adsorb waste.

[0045] During use, the negative pressure component 3 needs to work in conjunction with the discharge component 2 to successfully discharge waste materials. Figure 2 , Figure 6 , Figure 7 , Figure 8 As shown, the hollow upright 303 has a vent hole 307 at its outer end. The internal cavity of the hollow upright 303 communicates with the outside through the vent hole 307. The vent hole 307 is always located above the cover plate 302. A limiting ring is provided on the inner wall of the negative pressure cylinder 301. The piston plate 308 is located above the limiting ring. The connection between the air guide pipe 6 and the negative pressure cylinder 301 is located below the limiting ring. The limiting ring separates the piston plate 308 and the air guide pipe 6 to prevent the piston plate 308 from being too low and blocking the air guide pipe 6.

[0046] As the upper mold 102 moves downward during operation, the hollow upright 303 connected to the bottom of the fixed crossbeam 4 moves downward accordingly. The hollow upright 303 thus pushes the piston plate 308 downward, compressing the space below the piston plate 308. Since both the air guide pipe 6 and the hollow upright 303 are equipped with one-way valves, the air in the negative pressure cylinder 301 can enter through the air guide pipe 6 but cannot be discharged through the air guide pipe 6. Similarly, the air inside the negative pressure cylinder 301 can be discharged through the hollow upright 303 but cannot enter through the hollow upright 303. Therefore, after the air inside this space is compressed, it will flow through the hollow upright 303 and eventually be discharged through the vent 307. Thus, during the up-and-down movement of the upper mold 102, the negative pressure component 3 can circulate air intake and exhaust, continuously generating suction.

[0047] A fixing ring 305 is fixedly provided at the outer end of the hollow upright 303. The fixing ring 305 is located above the vent hole 307. A spring 304 is fixedly provided at the top of the fixing ring 305. The spring 304 is sleeved on the outer end of the hollow upright 303. A top plate 306 is fixedly provided at the top of the spring 304. The top plate 306 is detachably connected to the corresponding fixing crossbeam 4.

[0048] During the upward movement of the hollow upright 303 pulled by the fixed crossbeam 4, the vertical movement distance of the fixed crossbeam 4 is the same as that of the upper mold 102. However, the distance that the piston plate 308 can move inside the negative pressure cylinder 301 is less than the vertical movement distance of the fixed crossbeam 4. Therefore, during the upward movement of the hollow upright 303, when the piston plate 308 moves upward and is blocked by the cover plate 302, the piston plate 308 and the hollow upright 303 can no longer continue to move. Furthermore, the piston plate 308 stops moving at the same time that the tension band 207 is tightened (the length of the tension band 207 is pre-designed to meet this requirement). Although the piston plate 308 and the hollow upright 303... 03 cannot move upwards further, but the fixed crossbeam 4 will continue to move upwards and drive the top plate 306. The extension and retraction capacity of the spring 304 can allow the fixed crossbeam 4 to continue to move upwards while the hollow upright 303 remains stationary. However, at this time, the negative pressure inside the negative pressure cylinder 301 has disappeared, causing the adsorption force of the strip filter screen 208 on the waste to disappear at the same time, so that the waste can slide off the tray 201. In this way, the suction force generated when discharging waste is also controlled by the upper mold 102. The suction force is automatically generated and automatically disappears with the up and down movement of the upper mold 102, and it works closely with the discharge component 2, saving the energy to generate suction force and making waste discharge more convenient.

[0049] Based on the above description and accompanying drawings, those skilled in the art can understand and implement this invention. Furthermore, any non-creative modifications made to this invention by those skilled in the art without inventive effort are still within the scope of protection of this invention.

Claims

1. An automatic waste removal device for automotive stamping dies, installed on a workbench (1), comprising a lower die (101) disposed at the top of the workbench (1), and an upper die (102) disposed directly above the lower die (101), characterized in that: The workbench (1) is provided with discharge components (2) on both the front and rear sides. The discharge components (2) include two symmetrical trays (201). A negative pressure channel (202) is fixedly provided at the top of the tray (201). A strip filter screen (208) is embedded on the side of the negative pressure channel (202) facing the workbench (1). A duct pipe (6) with a one-way valve is fixedly provided on one side of the negative pressure channel (202). A negative pressure component (3) is provided at one end of the duct pipe (6). An adjusting rod (203) is fixedly provided at the other end of the support plate (201). A winding wheel (206) is fixedly provided at one end of the adjusting rod (203). A tension belt (207) is fixedly provided at the outer end of the winding wheel (206).

2. The automatic waste removal device for automotive stamping dies according to claim 1, characterized in that: The upper mold (102) is provided with two detachable fixed crossbeams (4) on both sides, and the top ends of the four tension bands (207) are respectively connected to the four fixed crossbeams (4).

3. The automatic waste removal device for automotive stamping dies according to claim 2, characterized in that: The outer end of the adjusting rod (203) is rotatably connected to the mounting plate (204), the mounting plate (204) is connected to the outer end of the workbench (1), and the mounting plate (204) is provided with a torsion spring (205) on the side facing the corresponding support plate (201). One end of the torsion spring (205) is provided with an annular protrusion, and the annular protrusion is fixedly provided on the outer end of the adjusting rod (203).

4. The automatic waste removal device for automotive stamping dies according to claim 1, characterized in that: Below each of the two discharge components (2) is a collection box (5). The inner wall of the collection box (5) is provided with a filter screen (501). The filter screen (501) is provided with multiple blocking rods (502) that penetrate the filter screen (501). The front side of the collection box (5) is provided with two removable sealing plugs. The collection box (5) is filled with water.

5. An automatic waste removal device for automotive stamping dies according to claim 2, characterized in that: The negative pressure assembly (3) includes a negative pressure cylinder (301). The other end of the air guide pipe (6) is fixedly connected to the corresponding negative pressure cylinder (301) and communicates with the inside of the negative pressure cylinder (301). The top of the negative pressure cylinder (301) is provided with a cover plate (302). The cover plate (302) is provided with a hollow upright (303) that penetrates the cover plate (302). The four hollow uprights (303) correspond to four fixed crossbeams (4) respectively.

6. An automatic waste removal device for automotive stamping dies according to claim 5, characterized in that: The negative pressure cylinder (301) is provided with a piston plate (308) inside. A sealing ring is fixedly provided at the outer end of the piston plate (308). The outer end of the sealing ring is in contact with the inner wall of the negative pressure cylinder (301). The bottom end of the hollow upright rod (303) extends into the negative pressure cylinder (301) and passes through the piston plate (308). A one-way valve is fixedly provided on the hollow upright rod (303).

7. An automatic waste removal device for automotive stamping dies according to claim 6, characterized in that: The hollow upright (303) has a vent hole (307) at its outer end. The internal cavity of the hollow upright (303) is connected to the outside through the vent hole (307). The vent hole (307) is always located above the cover plate (302). A limiting ring is provided on the inner wall of the negative pressure cylinder (301). The piston plate (308) is located above the limiting ring. The connection between the air guide pipe (6) and the negative pressure cylinder (301) is located below the limiting ring.

8. An automatic waste removal device for automotive stamping dies according to claim 7, characterized in that: A fixing ring (305) is fixedly provided at the outer end of the hollow upright (303), and a spring (304) is fixedly provided at the top end of the fixing ring (305). A top plate (306) is fixedly provided at the top end of the spring (304), and the top plate (306) is connected to the corresponding fixing beam (4).

Images