Stamping device for chemical equipment production

Abstract

The application relates to the technical field of punch dies, and discloses a punch device for chemical equipment production, which comprises an upper die base, a lower die base and a punch die arranged on the upper die base, the upper section of the punch die is smaller in diameter than the lower section, a rotating drum corresponding to the punch die and flush with the top of the lower die base is rotatably arranged on the lower die base, and a scraping assembly is arranged on the rotating drum. The punch device for chemical equipment production is provided with the scraping assembly on the lower die base in linkage with the lifting of the upper die base, and the punch die is provided with a stepped structure, so that the punch die can scrape and clean the workpiece after punch forming, the problem of process increase and production cycle prolonging caused by transferring the workpiece to an independent deburring device for secondary processing is avoided, the investment in the special deburring device and the labor cost are reduced, and the adverse effects of secondary clamping on the surface quality and dimensional accuracy of the workpiece are eliminated.

Description

Technical Field

[0001] This invention relates to the field of stamping die technology, and in particular to a stamping device for chemical equipment production. Background Technology

[0002] A stamping device is a forming and processing equipment that uses a press and dies to apply external force to metal sheets, causing them to undergo plastic deformation or separation, thereby obtaining workpieces with predetermined shapes, sizes, and properties. Its basic principle is that through the cooperation of a punch and a die, under the action of instantaneous impact force or static pressure, the sheet metal is separated or deformed along a specific contour. It has advantages such as high production efficiency, high material utilization rate, and good product consistency, and is widely used in machinery manufacturing, automotive industry, electronics and electrical appliances, and chemical equipment production. In the manufacturing process of chemical equipment, a large number of parts such as tower plates, distributors, flanges, and filter screens need to be blanked, punched, and formed by stamping devices. Stamping has become a key process link in the production of core internal parts of chemical equipment.

[0003] When existing stamping equipment performs stamping or blanking processes on workpieces, due to the unavoidable clearance between the punch and die, plastic protrusions, or burrs, are generated on the tensile side during the material fracture and separation process. Burrs are a common process defect in blanking, usually irregularly distributed along the blanking contour of the workpiece. For chemical equipment parts, the presence of burrs not only affects the appearance quality of the workpiece, but may also cause contamination of the medium during use, affect the uniformity of fluid distribution, accelerate the wear of sealing surfaces, and even lead to jamming of internal tower components or clogging of filter elements, directly affecting the operational stability and safety of chemical equipment. To address the burrs generated after stamping, current... In some technologies, burrs are typically processed in a separate post-processing step. After stamping, the workpiece is transferred to a dedicated deburring machine for secondary processing, such as mechanical scraping, vibratory grinding, tumbling, or chemical polishing. While this post-processing method can eliminate burrs to some extent, it increases the number of processes, extends the production cycle, and requires specialized deburring equipment and operators, leading to a significant increase in production costs. Furthermore, the secondary clamping can easily cause scratches or dimensional deviations on the workpiece surface, making it difficult to balance efficiency and quality. Therefore, how to effectively control burrs simultaneously during the stamping process and avoid adding a separate post-processing step has become a pressing technical problem in this field. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that existing stamping devices will produce burrs on the edge of the workpiece contour after stamping, which must be removed by a separate subsequent process. This not only increases the investment in equipment and production cycle, but also easily causes workpiece damage due to secondary clamping. It is difficult to meet the high precision requirements while ensuring processing efficiency. Therefore, we propose a stamping device for chemical equipment production.

[0005] To achieve the above objectives, this application adopts the following technical solution: a stamping device for chemical equipment production, including an upper die base, a lower die base, and a stamping die disposed on the upper die base. The upper section diameter of the stamping die is smaller than the lower section diameter. A rotating cylinder corresponding to the stamping die and flush with the top of the lower die base is rotatably disposed on the lower die base. A scraping component is disposed on the rotating cylinder.

[0006] The scraping assembly includes at least two slides on the top of the rotating drum. Scraping blocks flush with the top of the rotating drum are movably arranged along the radial direction of the slides inside the slides. A traction arm is provided at the end of the scraping block away from the axis of the rotating drum, and the traction arms on the multiple scraping blocks are arranged at different heights. An auxiliary ring is provided on the inner side of the lower die base, located on the outer periphery of the rotating drum and corresponding to the traction arms one by one. One end of the auxiliary ring has a notch, and the two sides of the notch are inclined surfaces. A drive assembly is provided on the lower die base for driving the rotating drum to rotate and for linkage with the lifting and lowering of the upper die base. The drive assembly is used to drive the rotating drum to rotate after the lower end of the stamping die enters the inner side of the rotating drum.

[0007] Preferably, the driving assembly includes a first driven wheel disposed on the outside of the rotating drum, a rotating vertical shaft rotatably disposed on the lower mold base, a first driving wheel meshing with the first driven wheel disposed on the rotating vertical shaft, a first driving groove having a vertical upper end and a spiral lower end disposed on the rotating vertical shaft, a sleeve being disposed on the lower mold base that is movably engaged with the rotating vertical shaft, and a second driving block being disposed on the inner wall of the sleeve that is movably engaged with the first driving groove.

[0008] Preferably, the scraper block has an elastic element on its side for resetting.

[0009] Preferably, the end of the traction arm is movably provided with a ball bearing or a roller.

[0010] Preferably, the bottom of the upper die base is provided with a pressure plate having a central hole and corresponding to the stamping die, the bottom of the upper die base is provided with a limiting ring corresponding to the pressure plate, a compression spring is provided between the pressure plate and the limiting ring, and when the compression spring is in its initial state, the pressure plate is lower than the stamping die.

[0011] Preferably, the upper mold base is provided with an adjustment component for adjusting the height of the limiting ring. The adjustment component includes a second mounting through hole located at the bottom of the upper mold base and corresponding to the limiting ring. The limiting ring is movably disposed in the second mounting through hole. The inner wall of the second mounting through hole is provided with a spiral groove. The side wall of the limiting ring is provided with a guide block that movably engages with the spiral groove. The limiting ring is provided with a second driven wheel. A rotating cylinder corresponding to the rotating shaft is rotatably disposed on the upper mold base. A second driving wheel with a thickness greater than that of the second driven wheel and meshing with the second driven wheel is mounted on the rotating cylinder. The inner wall of the rotating cylinder is provided with a second driving groove that is spiral at the upper end and vertical at the lower end. A lifting column is vertically movably disposed on the inner side of the rotating cylinder, and the bottom of the lifting column is rotatably connected to the rotating shaft. The side wall of the lifting column is provided with a first driving block that movably engages with the second driving groove.

[0012] Preferably, the top of the pressure plate is provided with a guide post that moves and guides the inner side of the limiting ring, and the compression spring is sleeved on the outside of the guide post.

[0013] Preferably, the top end of the compression spring is provided with a friction-reducing washer that is movably sleeved with the guide post, and the top end of the friction-reducing washer is movably provided with a roller or ball.

[0014] Preferably, the rotating cylinder is provided with a limiting cylinder, and the lifting column and the limiting cylinder are connected by a movable key.

[0015] Preferably, the first driving block, the second driving block, and the guide block are hemispherical structures.

[0016] The technical effects and advantages of this invention are as follows:

[0017] In this invention, a scraping assembly that is linked to the lifting and lowering of the upper die base is installed on the lower die base. The scraping assembly utilizes a rotating cylinder and a radially displaced scraping block. The stamping die is designed as a stepped structure with a smaller diameter at the top than at the bottom. After the stamping die completes the stamping process and enters the center hole of the rotating cylinder, the rotating cylinder rotates, causing the scraping block to extend and scrape the bottom of the workpiece around the stamping area. This allows for simultaneous burr removal during the stamping process, effectively avoiding the increased processing steps and extended production cycle caused by transferring the workpiece to a separate deburring device for secondary processing. It also reduces the investment in dedicated deburring equipment and labor costs, eliminates the adverse effects of secondary clamping on the workpiece's surface quality and dimensional accuracy, and provides clearance for the scraping block using the small-diameter structure of the upper part of the stamping die, ensuring the timing coordination between the scraping action and the stamping stroke. Furthermore, the scraping assembly automatically resets as the upper die base resets, achieving integrated burr removal and stamping processes. This significantly improves the overall efficiency and processing quality of chemical equipment parts production.

[0018] In this invention, a pressure plate combined with a compression spring automatically clamps the workpiece during stamping. With the assistance of an adjustment component, the compression spring stops compressing or reduces its amplitude after reaching a set clamping force threshold. This ensures the workpiece is firmly clamped while controlling the maximum compression of the spring within a reasonable range, effectively preventing fatigue damage caused by repeated excessive compression during each stamping process. This significantly extends the lifespan of the compression spring and the maintenance cycle of the mold. Furthermore, since the compression of the spring is limited to below the peak load, the resistance that the power source driving the upper mold base needs to overcome during the downward movement of the upper mold base is correspondingly reduced, decreasing the instantaneous load and ineffective power consumption of the drive source. In addition, the adjustment component keeps the clamping force relatively stable during the stamping process, preventing indentations or uneven material flow on the workpiece surface caused by the increasing clamping force due to continuous compression of the spring. This further improves the stamping quality of chemical equipment parts and the reliability of mold operation. Attached Figure Description

[0019] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts:

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is a structural diagram of the upper and lower mold bases of the present invention in their disassembled state;

[0022] Figure 3 This is a schematic diagram of the structure of the upper mold base from the bottom view.

[0023] Figure 4 This is a partial cross-sectional structural diagram of the lower mold base of the present invention;

[0024] Figure 5 For the present invention Figure 4 A structural diagram from another perspective based on the above;

[0025] Figure 6 This is a schematic diagram of the structure of the rotating cylinder, auxiliary ring, and lower mold base in their disassembled state according to the present invention;

[0026] Figure 7 This is a schematic diagram of the scraper block and the rotating drum in their disassembled state according to the present invention;

[0027] Figure 8 This is a partial cross-sectional structural diagram of the upper mold base of the present invention;

[0028] Figure 9 This is a schematic diagram of the structure of the limiting ring, compression spring, and guide post of the present invention in their disassembled state.

[0029] Legend: 1. Upper die base; 2. Lower die base; 3. Pressure plate; 4. Stamping die; 5. Rotating vertical shaft; 6. Rotating vertical cylinder; 7. Lifting column; 8. Sleeve; 9. Compression spring; 10. Guide column; 11. Limiting ring; 12. Rotating cylinder; 13. First drive groove; 14. First drive block; 15. First driving wheel; 16. First driven wheel; 17. Auxiliary ring; 18. Scraper block; 19. First mounting through hole; 20. Annular mounting groove; 21. Traction arm; 22. Slide groove; 23. Elastic element; 24. Second drive groove; 25. Second driven wheel; 26. Second driving wheel; 27. Second drive block; 28. Limiting cylinder; 29. ​​Friction-reducing shim; 30. Spiral groove; 31. Guide block; 32. Second mounting through hole. Detailed Implementation

[0030] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0031] like Figures 1-9 As shown, a stamping device for chemical equipment production includes an upper die base 1, a lower die base 2 located directly below the upper die base 1, and a stamping die 4 located at the bottom of the upper die base 1. The upper die base 1 is driven to rise and fall by a dedicated power source, which is a mature technology and will not be described in detail here.

[0032] In order to achieve the clamping of the top of the workpiece, a pressure plate 3 with a central hole and corresponding to the stamping die 4 is provided at the bottom of the upper die base 1. A limiting ring 11 corresponding to the pressure plate 3 is provided at the bottom of the upper die base 1. A compression spring 9 is provided between the pressure plate 3 and the limiting ring 11. In the initial state of the compression spring 9, the pressure plate 3 is lower than the stamping die 4. In order to guide the pressure plate 3 and the compression spring 9, a guide post 10 that is movable and guided to the inner side of the limiting ring 11 is provided at the top of the pressure plate 3. The compression spring 9 is sleeved on the outside of the guide post 10.

[0033] The stamping die 4 is designed with an upper section diameter smaller than the lower section diameter, forming a stepped structure. The lower die base 2 is provided with a first mounting through hole 19 corresponding to the stamping die 4. A rotating cylinder 12 is rotatably mounted in the first mounting through hole 19 via a bearing. The rotating cylinder 12 has a central hole, which is used to avoid the stamping die 4 when it moves down for stamping, and is also used for unloading. The top of the rotating cylinder 12 is flush with the top of the lower die base 2. A scraping component is provided on the rotating cylinder 12.

[0034] In a preferred embodiment, the scraping assembly includes at least two grooves 22 disposed on the top of the rotating drum 12. Scraping blocks 18, flush with the top of the rotating drum 12, are radially movably disposed inside the grooves 22. A traction arm 21 is disposed at the end of each scraping block 18 away from the axis of the rotating drum 12, and the traction arms 21 on the multiple scraping blocks 18 are disposed at unequal heights. An annular mounting groove 20, corresponding one-to-one with each traction arm 21, is disposed on the inner wall of the first mounting through hole 19. An auxiliary ring 17 is disposed in the annular mounting groove 20. The end of the traction arm 21 away from the scraping block 18 extends into the annular mounting groove. The inner side of the traction arm 20 corresponds to the auxiliary ring 17. One end of the auxiliary ring 17 has a notch, and the two sides of the notch are inclined surfaces. Initially, the traction arm 21 corresponds to the notch. In order to reduce the frictional resistance between the end of the traction arm 21 away from the scraper block 18 and the inner wall of the auxiliary ring 17, a ball or roller is movably provided at the end of the traction arm 21. In order to realize the rotation of the rotating drum 12, a drive assembly for driving the rotating drum 12 to rotate is provided on the lower die base 2. The drive assembly is linked with the lifting and lowering of the upper die base 1, and the drive assembly is used to drive the rotating drum 12 to rotate after the lower end of the stamping die 4 enters the inner side of the rotating drum 12.

[0035] Furthermore, in a preferred embodiment, the drive assembly includes a first driven wheel 16 fixedly installed on the outside of the rotating drum 12, a vertical rotating shaft 5 rotatably mounted on the lower mold base 2 via a bearing, a first driving wheel 15 meshing with the first driven wheel 16 fixedly mounted on one end of the rotating shaft 5 located inside the lower mold base 2, a first driving groove 13 provided on the upper outer wall of the rotating shaft 5, the upper end of the first driving groove 13 being divided into a vertical groove and the lower end being divided into a spiral groove, and the inner walls of the two grooves are smoothly transitioned, a sleeve 8 corresponding to the rotating shaft 5 is embedded in the bottom of the lower mold base 2, the upper end of the rotating shaft 5 is located inside the sleeve 8 and is movably connected to the sleeve 8, a second driving block 27 movably engaged with the first driving groove 13 is fixedly provided on the inner wall of the sleeve 8, the second driving block 27 preferably having a hemispherical structure.

[0036] To facilitate the reset of the scraper block 18, an elastic element 23 for its reset is provided between the side of the scraper block 18 and the inner wall of the slide groove 22. The elastic element 23 is preferably a spring, which can compress the elastic element 23 when the scraper block 18 moves in the opposite direction to the axis of the rotating cylinder 12.

[0037] In addition, in order to stop or reduce the contraction of the compression spring 9 after it has contracted to a certain extent, an adjustment component for adjusting the height of the limiting ring 11 is provided on the upper mold base 1. As one embodiment, the adjustment component includes a second mounting through hole 32 located at the bottom of the upper mold base 1 and corresponding to the limiting ring 11. The limiting ring 11 is movably disposed in the second mounting through hole 32. A spiral groove 30 is provided on the inner wall of the second mounting through hole 32. A guide block 31 that movably engages with the spiral groove 30 is provided on the side wall of the limiting ring 11. The guide block 31 has a hemispherical structure. A second driven wheel 25 is fixedly mounted on the upper end of the limiting ring 11. A rotating cylinder 6 corresponding to the rotating vertical shaft 5 is rotatably disposed on the upper mold base 1. A second driving wheel 25 with a thickness greater than the thickness of the second driven wheel 25 is mounted on the rotating cylinder 6 and meshes with the second driven wheel 25. The inner wall of the rotating cylinder 6 is provided with a second drive groove 24, which is spiral at the top and vertical at the bottom. The spiral groove and the vertical groove are smoothly connected. A limiting cylinder 28 is fixedly provided at the upper end of the rotating cylinder 6. A lifting column 7 is movably provided on the inner side of the rotating cylinder 6. The lifting column 7 and the limiting cylinder 28 are connected by a key. Alternatively, the lifting column 7 can be set as a polygonal prism. A polygonal prism groove adapted to the lifting column 7 can be provided on the limiting cylinder 28 to achieve the vertical displacement effect of the lifting column 7. At the same time, in order to facilitate the connection between the lifting column 7 and the rotating shaft 5, the bottom of the lifting column 7 and the top of the rotating shaft 5 are rotatably connected by a bearing. The lower side wall of the lifting column 7 is provided with a first drive block 14 that movably cooperates with the second drive groove 24. The scraping block 18 is a hemispherical structure.

[0038] To reduce friction between the limiting ring 11 and the compression spring 9, a friction-reducing pad 29 is provided at the top of the compression spring 9 and is movably sleeved with the guide post 10. A roller or ball is movably provided at the top of the friction-reducing pad 29, so that when the limiting ring 11 rotates, it can make rolling or rotating contact with the roller or ball at the top of the friction-reducing pad 29, thereby reducing friction.

[0039] Working principle: Initially, the pressure plate 3 is lower than the bottom of the stamping die 4. The second drive block 27 is located in the vertical section at the upper end of the first drive groove 13, and the first drive block 14 is located in the vertical section at the lower end of the second drive groove 24. During operation, the workpiece to be stamped is placed on top of the lower die base 2. The power source drives the upper die base 1 to gradually descend. The second drive block 27 moves in the vertical section at the upper end of the first drive groove 13, and the first drive block 14 moves in the vertical section at the lower end of the second drive groove 24. Then, the pressure plate 3 contacts the workpiece and presses it down. The upper die base 1 continues to move down, pressing... Plate 3 is stationary, and compression spring 9 contracts to firmly press the workpiece. Then, stamping die 4 passes through pressure plate 3 and performs stamping. Subsequently, second drive block 27 enters the spiral section at the lower end of first drive groove 13, and first drive block 14 enters the spiral section at the upper end of second drive groove 24. This causes rotating shaft 5 and rotating cylinder 6 to rotate. Rotating shaft 5 drives rotating cylinder 12 to rotate through the cooperation of first drive wheel 15 and first driven wheel 16. The rotation of rotating cylinder 12 causes scraper block 18 to rotate synchronously. The end of traction arm 21 away from scraper block 18 is connected to the auxiliary... The notch of ring 17 gradually shifts to the inner side of auxiliary ring 17, thereby pushing scraper block 18 in the opposite direction to the axis of rotating cylinder 12 by traction arm 21. At the same time, elastic element 23 is compressed. Scraper block 18 scrapes the burrs at the bottom of the workpiece stamping area. Since there are at least two scraper blocks 18, the notches on different auxiliary rings 17 do not coincide in the vertical direction, thus achieving 360-degree burr treatment at the workpiece stamping area. The small diameter at the upper end of stamping die 4 can avoid the radial displacement of scraper block 18. When rotating cylinder 6 rotates, it will pass through the second main The cooperation of the driving wheel 26 and the second driven wheel 25 enables the rotation of the limiting ring 11. Then, with the cooperation of the spiral groove 30 and the guide block 31, the limiting ring 11 can gradually move upward. As the upper die base 1 descends, the distance between the pressure plate 3 and the limiting ring 11 can remain unchanged or change slightly, avoiding excessive contraction of the compression spring 9. After the stamping and scraping are completed, the upper die base 1 rises, the rotating cylinder 12 rotates, the scraping block 18 retracts, the traction arm 21 aligns with the notch of the auxiliary ring 17 again, and the limiting ring 11 will also reverse and descend back to the initial position.

[0040] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. A stamping device for chemical equipment production, characterized in that, It includes an upper die base, a lower die base, and a stamping die set on the upper die base. The upper section diameter of the stamping die is smaller than the lower section diameter. A rotating cylinder corresponding to the stamping die and flush with the top of the lower die base is rotatably set on the lower die base. A scraping component is set on the rotating cylinder. The scraping assembly includes at least two slides on the top of the rotating drum. Scraping blocks flush with the top of the rotating drum are movably arranged along the radial direction of the slides inside the slides. A traction arm is provided at the end of the scraping block away from the axis of the rotating drum, and the traction arms on the multiple scraping blocks are arranged at different heights. An auxiliary ring is provided on the inner side of the lower die base, located on the outer periphery of the rotating drum and corresponding to the traction arms one by one. One end of the auxiliary ring has a notch, and the two sides of the notch are inclined surfaces. A drive assembly is provided on the lower die base for driving the rotating drum to rotate and for linkage with the lifting and lowering of the upper die base. The drive assembly is used to drive the rotating drum to rotate after the lower end of the stamping die enters the inner side of the rotating drum.

2. The stamping device for chemical equipment production according to claim 1, characterized in that: The drive assembly includes a first driven wheel disposed on the outside of the rotating drum, a rotating vertical shaft rotatably disposed on the lower mold base, a first driving wheel meshing with the first driven wheel disposed on the rotating vertical shaft, a first drive groove disposed on the rotating vertical shaft with the upper end being vertical and the lower end being spiral, a sleeve disposed on the lower mold base that is movably engaged with the rotating vertical shaft, and a second drive block disposed on the inner wall of the sleeve that is movably engaged with the first drive groove.

3. The stamping device for chemical equipment production according to claim 1, characterized in that: The scraping block has an elastic element on its side for resetting.

4. The stamping device for chemical equipment production according to claim 1, characterized in that: The end of the traction arm is movably equipped with ball bearings or rollers.

5. The stamping device for chemical equipment production according to claim 2, characterized in that: The bottom of the upper mold base is provided with a pressure plate having a central hole and corresponding to the stamping die. The bottom of the upper mold base is provided with a limiting ring corresponding to the pressure plate. A compression spring is provided between the pressure plate and the limiting ring. In the initial state of the compression spring, the pressure plate is lower than the stamping die.

6. The stamping device for chemical equipment production according to claim 5, characterized in that: The upper mold base is provided with an adjustment component for adjusting the height of the limiting ring. The adjustment component includes a second mounting through hole located at the bottom of the upper mold base and corresponding to the limiting ring. The limiting ring is movably disposed in the second mounting through hole. The inner wall of the second mounting through hole is provided with a spiral groove. The side wall of the limiting ring is provided with a guide block that movably engages with the spiral groove. A second driven wheel is provided on the limiting ring. A rotating cylinder corresponding to the rotating shaft is rotatably disposed on the upper mold base. A second driving wheel with a thickness greater than that of the second driven wheel and meshing with the second driven wheel is installed on the rotating cylinder. The inner wall of the rotating cylinder is provided with a second driving groove that is spiral at the upper end and vertical at the lower end. A lifting column is vertically movably disposed on the inner side of the rotating cylinder, and the bottom of the lifting column is rotatably connected to the rotating shaft. The side wall of the lifting column is provided with a first driving block that movably engages with the second driving groove.

7. The stamping device for chemical equipment production according to claim 5, characterized in that: The top of the pressure plate is provided with a guide post that moves and guides the inner side of the limiting ring, and the compression spring is sleeved on the outside of the guide post.

8. The stamping device for chemical equipment production according to claim 7, characterized in that: The top of the compression spring is provided with a friction-reducing pad that is movably sleeved with the guide post, and a roller or ball is movably provided on the top of the friction-reducing pad.

9. The stamping device for chemical equipment production according to claim 6, characterized in that: The rotating vertical cylinder is equipped with a limiting cylinder, and the lifting column is connected to the limiting cylinder by a movable key.

10. The stamping device for chemical equipment production according to claim 6, characterized in that: The first driving block, the second driving block, and the guide block are hemispherical structures.

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