Arc-shaped sheet metal workpiece stamping die

Abstract

The invention relates to the technical field of stamping dies, in particular to an arc-shaped sheet metal workpiece stamping die which is mainly characterized by comprising a support, a filling mechanism, a stamping mechanism, a working groove and a cleaning mechanism. The support is located at the upper end of the filling mechanism, the filling mechanism is fixedly connected to the working groove and used for continuously providing materials for the working groove, the stamping mechanism is fixed to the upper end of the support, the radian of the stamping mechanism is adjustable, the working groove is located at the lower end of the stamping mechanism, and the size of the working groove can be adjusted according to the size of the stamping mechanism. The material filling mechanism, the punching mechanism and the working groove are all electrically connected with the control unit; by the adoption of the nested stamping mechanism, the stamping mechanism can be adjusted under the condition that the whole equipment does not need to be disassembled so as to produce different workpieces, and meanwhile the function of clearing away chippings is achieved in the workpiece finishing process every time.

Description

Technical Field

[0001] This invention relates to the field of stamping die technology, specifically to a stamping die for arc-shaped sheet metal workpieces. Background Technology

[0002] Stamping dies are a type of processing equipment used in cold stamping to shape materials into parts. Cold stamping refers to a pressure processing method that uses a punch and die mounted on a press to apply pressure to the material in the working area at room temperature. Because metal has ductility, this causes deformation, thereby obtaining the desired part.

[0003] During the stamping process of curved sheet metal workpieces, the surface of the long plate-shaped workpiece is relatively rough. During stamping, the large pressure impacts the metal material. Due to the ductility of metal, deformation occurs, easily generating many debris. Over multiple stamping operations, this debris accumulates. If this debris is not cleaned promptly, it will affect the quality of subsequent stampings. Furthermore, because the curved sheet metal equipment has a fixed curved punch, the stamped workpieces are relatively repetitive. If a different stamping size is required, changing the die necessitates replacing the entire equipment. Disassembly is required, and different punches must be adapted for different processed parts. However, stamping equipment is generally bulky and difficult to disassemble and assemble. When dealing with workpieces of different sizes, multiple machines must be used. Furthermore, some current stamping processes for irregular arc-shaped structures used in engine or cylinder housings require different arcs for different locations of the bulges during stamping. The length of the arc needs to be adjusted for different engine housing sizes, which greatly increases the difficulty of replacement and reduces efficiency.

[0004] Based on this, the present invention provides a stamping die for arc-shaped sheet metal workpieces to solve the above problems. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that, since the stamping die is fixed during the stamping process, the entire equipment needs to be disassembled when the sheet metal size needs to be changed, and the punch cannot be adjusted quickly according to the required workpiece to stamp sheet metal parts of different sizes.

[0006] To solve the above technical problems, the present invention adopts the following technical solution: A stamping die for an arc-shaped sheet metal workpiece is provided, the main components of which include a support, a filling mechanism, a stamping mechanism, a working groove, and a cleaning mechanism; the support is connected to the filling mechanism via a support column, the filling mechanism is installed on the side wall of the working groove, and pushes the material into the working groove via a sliding rod; the stamping mechanism is connected to the support via a snap-fit ​​rod, and changes the punch size by moving the operating rod, thereby changing the angle between the tension rod and the support column; the working groove is located at the lower end of the stamping mechanism, and the cleaning mechanism is installed inside the working groove, increasing the surrounding gas flow rate by squeezing the extrusion bladder before each material processing.

[0007] The stamping mechanism includes an outer frame, a hydraulic cylinder, a punch, a support column, and a tension rod. The support column and tension rod are arranged inside the outer frame. The punch is connected to the bottom of the outer frame, and the support column is installed on the top of the punch. The two ends of the punch are hinged to the tension rod. The hydraulic cylinder is located on the top of the support column, and the support column and tension rod form a triangular structure. The punch is composed of multiple nested parts and is set as a semi-arc structure, wherein each layer of punch has snap-fit ​​holes on both sides.

[0008] The upper end of the punch is provided with a spiral hole, which is rotatably connected to the support column. The upper end of the punch is connected with a rack, which engages with the snap-fit ​​sleeve at the lower end of the support column. There are two racks, each connected to a punch of a different specification.

[0009] During stamping, when the operating lever is not stretched, the punch size is at its smallest. During this process, the isosceles triangle formed by the support column and the stretching rod has a relatively large side angle. As the size of the workpiece changes, the stretching lever is stretched, and the stretching rod is pulled synchronously, causing the punch to gradually extend. Due to the isosceles triangle structure, the height of the isosceles triangle becomes shorter, so the rack is fixedly connected to the upper end of the punch. This causes the two racks to move relative to each other, resulting in the rotation of the retaining sleeve. At this time, the support column and the retaining sleeve rotate relative to each other, thus achieving the effect of a lead screw. This shortens the support column, allowing it to enter the punch's interior, thereby expanding the support point during stamping.

[0010] The upper end of the support column is fixedly connected to a slide rail, and a vertical rod is slidably connected in the slide groove of the slide rail. The other end of the vertical rod is fixedly connected to an operating rod, and there are two operating rods. The bracket is located at the upper end of the filling mechanism, and the filling mechanism is fixedly connected to the outer frame of the working groove for continuously supplying material to the working groove. The stamping mechanism is fixed at the upper end of the bracket and the arc size of the punch is adjustable. The working groove is located at the lower end of the stamping mechanism and the size of the working groove can be adjusted according to the size of the punch. The cleaning mechanism is set on one side of the working groove for cleaning the working area before each material processing. The filling mechanism, the stamping mechanism, and the working groove are all electrically connected to the control unit.

[0011] The support includes a support column, a slide rail, a plumb line, and an operating lever. The lower end of the operating lever is horizontally slidably connected to an extension rod. Both ends of the extension rod are fixedly connected to receiving blocks. A snap-fit ​​rod is slidably connected within each receiving block and is slidably snapped into a snap-fit ​​hole. The upper end of the support column is fixedly connected to the slide rail. A plumb line is slidably connected within a groove in the slide rail. The other end of the plumb line is fixedly connected to the operating lever. The operating lever is equipped with a magnetic component, preferably an electromagnet, which locks the lever and the operating lever is used to adjust the punch size. There are at least two operating levers. The plumb line and the operating lever are electrically connected to the control unit.

[0012] The filling mechanism includes a chassis, a sliding rail, a sliding rod, a support plate, and a pushing mechanism. The chassis is fixedly connected to one side of the working trough, the sliding rail is fixedly connected to the upper surface of the chassis, the sliding rod is placed parallel to the sliding rail, the support plate is placed on the upper end of the sliding rail and its two ends are engaged with the sliding rail, and the pushing mechanism is located at the end of the sliding rod near the working trough. The chassis is fixedly connected to one side of the working trough, the sliding rail is located on the upper surface of the chassis, the sliding rod is located on the sliding rail, the sliding rod is placed parallel to the sliding rail, the sliding rail and chassis have the same length, the support plate is placed on the upper end of the sliding rail and its two ends are engaged with the sliding rail, and the pushing mechanism is located at the end of the sliding rod near the working trough, used to push materials in and out. The countersunk holes on the pushing mechanism are preferably designed in a triangular distribution.

[0013] The punch is configured as a semi-arc structure with multiple nested layers, each layer of the arc punch having snap-fit ​​holes on both sides; the punch is preferably a transversely inserted structure, which can be replaced by an operating rod to adapt to molds with different curvatures; a portion of the upper surface of the punch extends out to one side, and this structure contacts the upper surface of the working groove during the operation of the punch; the punch can be adjusted according to the specific workpiece size required; the adjacent replacement structures of the punch are snapped together by a snap-fit ​​groove; the punching force is set to 15%-30% of the bending force.

[0014] The working groove is a semi-circular groove, and the other side of the working groove is engaged with a cleaning mechanism; the working groove is a replaceable structure, and the upper surface of the cleaning mechanism is provided with a structure that can release liquid, preferably a water-based lubricant, and this structure is electrically connected to the control unit.

[0015] The cleaning mechanism includes a squeezing bladder and air vents. The air vents are arranged in a ring array around the inner wall of the groove, and the gas flow direction is perpendicular to the side of the stamping mechanism. The number of air vents is set to multiple. A rectangular groove is provided on the upper surface of the cleaning mechanism, and the squeezing bladder is located in the rectangular groove. The air vents connect the rectangular groove and the working area of ​​the working groove. The squeezing bladder is preferably an air bladder, but it can also be other structures that can accelerate the air flow. Liquid release mechanisms are provided at both ends of the cleaning mechanism, and the liquid is a water-based lubricant. The cleaning mechanism is located on one side of the working groove, and a groove is provided on one side of the working groove. The squeezing bladder is located in the groove, and the air vents connect the groove and the working area of ​​the working groove. The groove is located on the side of the working groove near the pushing mechanism, and multiple air vents are set, which are connected to the inside of the working groove through the inside of the groove.

[0016] The beneficial effects of this invention are as follows:

[0017] 1. This invention sets the stamping mechanism as a multi-layer punch and sets a telescopic operating rod at the upper end of the stamping mechanism to replace the stamping mechanism to adapt to workpieces with different curvatures; and sets a slot between adjacent stamping mechanisms to lock them together, and switches between stamping mechanisms by sliding the rod on the operating rod, which greatly reduces the need for replacing and disassembling stamping equipment and improves work efficiency.

[0018] 2. This invention cleans metal debris in the working groove area before the stamping process by setting a cleaning mechanism at the edge of the working groove. This makes debris cleaning an integral part of each workpiece processing process, reducing the required investment cost compared to directly setting a fan. Due to the combination of groove and extrusion bladder, maintenance and replacement are easier and the cleaning effect is better. At the same time, considering the processing of relatively large metal workpieces, a liquid release structure is set on one side, from which water-based lubricant can be released, which can reduce the problem of poor workpiece quality caused by excessive heat during operation.

[0019] 3. By setting up a filling mechanism and combining a chute and a pushing mechanism, the present invention reduces additional manual input. The pushing mechanism pushes the material workpiece into the working trough, thereby significantly improving work efficiency. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is an overall schematic diagram of the present invention;

[0022] Figure 2 This is an overall side view of the present invention;

[0023] Figure 3 This is a schematic diagram of the seasoning mechanism of the present invention;

[0024] Figure 4 This is a schematic diagram of the bracket of the present invention;

[0025] Figure 5 This is an enlarged view (A) of the operating lever structure of the present invention;

[0026] Figure 6 This is a schematic diagram of the stamping mechanism of the present invention;

[0027] Figure 7 This is a schematic cross-sectional view of the snap-fit ​​sleeve of the present invention;

[0028] Figure 8 This is a schematic diagram of the punch nesting of the present invention;

[0029] Figure 9 This is a schematic diagram of the working groove of the present invention;

[0030] Figure 10 This is a cross-sectional view of the working groove of the present invention.

[0031] In the diagram: 1. Bracket; 11. Support column; 12. Slide rail; 13. Vertical rod; 14. Operating lever; 141. Extension rod; 142. Receiving block; 143. Snap-fit ​​rod; 144. Electromagnet; 15. Slide groove; 2. Filling mechanism; 21. Chassis; 22. Slide rail; 23. Slide rod; 24. Support plate; 25. Pushing mechanism; 3. Stamping mechanism; 31. Snap-fit ​​hole; 32. Outer frame; 33. Hydraulic cylinder; 34. Punch; 341. Spiral hole; 342. Rack; 35. Support column; 351. Snap-fit ​​sleeve; 36. Tensioning rod; 4. Working groove; 5. Cleaning mechanism; 51. Compression bladder; 52. Air outlet; 53. Rectangular groove; 6. Liquid release mechanism. Detailed Implementation

[0032] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0033] like Figure 1 and Figure 2 As shown, this invention discloses a stamping die for an arc-shaped sheet metal workpiece.

[0034] The following is for Figure 1 The structural implementation method will be described in detail.

[0035] Example 1: Its mechanism mainly includes a support 1, a filling mechanism 2, a stamping mechanism 3, a working groove 4, and a cleaning mechanism 5;

[0036] like Figure 4 and Figure 5 As shown, the support 1 includes a support column 11, a slide rail 12, a plumb line 13 and an operating rod 14. The slide rail 12 is welded to one end of the support column 11. The plumb line 13 is provided on the side of the slide rail 12 near the working area. The plumb line 13 can slide on the side near the working area. The operating rod 14 is fixedly connected to the plumb line 13. The lower end of the operating rod 14 is provided with a snap-fit ​​rod for replacing the stamping mechanism 3.

[0037] like Figure 3 As shown, the filling mechanism 2 includes a chassis 21, a sliding rail 22, a sliding rod 23, a support plate 24, and a pushing mechanism 25. The filling mechanism 2 is fixedly connected to the outer frame 41 of the working trough 4, and can continuously supply materials to the working trough 4 through the filling mechanism 2. The chassis 21 and the edge of the working trough 4 are at the same horizontal height and are fixedly connected. The sliding rail 22 is set on the upper surface of the chassis 21. The two ends of the support plate 24 are slidably connected to the sliding rail 22, so that the support column 11 can slide on the sliding rail 22. The sliding rod 23 is located between the sliding rails 12, so that the material is continuously pushed in each processing process.

[0038] like Figure 6 As shown, the stamping mechanism 3 includes an outer frame 32, a hydraulic cylinder 33, a punch 34, a support column 35, and a tension rod 36. The support column 35 and the tension rod 36 are arranged inside the outer frame. The punch 34 is connected to the lowest end of the outer frame 32. The support column 35 is installed on the upper end of the punch 34. The two ends of the punch 34 are hinged to the tension rod 36. The hydraulic cylinder 33 is located on the upper end of the support column 35, and the support column 35 and the tension rod 36 form a triangular structure. The punch 34 is composed of multiple nested parts and is set as a semi-arc structure. Each layer of punch 34 has a snap-fit ​​hole 31 on both sides.

[0039] like Figure 7 As shown, the upper end of the punch is provided with a spiral hole 341, which is rotatably connected to the support column 35. The upper end of the punch 34 is connected with a rack 342, which engages with the snap sleeve 351 at the lower end of the support column 35. There are two racks 342, which are respectively connected to punches 34 of different specifications.

[0040] like Figure 8As shown, the arc of the stamping mechanism 3 is adjustable. The stamping mechanism 3 is adjusted by the operating lever 14. In addition to using the snap-fit ​​lever on the operating lever 14 to change the specifications of the current stamping mechanism, the working slot 4 of the current working area is changed according to the specifications of the stamping mechanism 3. The cleaning mechanism 5 includes a compression bladder 51 and an air outlet 52. The upper surface of the cleaning mechanism 5 is provided with a groove, in which the compression bladder 51 is placed. When the compression bladder 51 is not working, it is located in the groove. That is, when it is in the expanded state, one-third of the volume of the compression bladder 51 is located outside the groove, and the remaining two-thirds are located inside the groove. Multiple air outlets 52 are arranged around the inside of the groove to facilitate the normal discharge of gas from the compression bladder 51. The air outlets 52 of the cleaning mechanism 5 connect the groove and the working area, so that when the compression bladder 51 deforms, the gas can directly act on the metal debris in the working area. The filling mechanism 2, the stamping mechanism 3 and the working slot 4 are all electrically connected to the control unit.

[0041] The support 1 consists of a support column 11, a slide rail 12, a plumb rod 13, and an operating rod 14. The lower end of the support column 11 stands on the support plate 24 of the filling structure, and the upper end of the support column 11 is fixedly connected to the slide rail 12. The slide rail 12 is provided on the side near the stamping mechanism 3. The plumb rod 13 is located inside the slide rail 12, and the other end of the plumb rod 13 is fixedly connected to the operating rod 14. The operating rod 14 can adjust the specifications of the stamping mechanism 3 according to the required workpiece size. Two operating rods are provided, and the lower end of the operating rod 14 is provided with four locking rods. The number is adjusted according to the stamping mechanism 3. The plumb rod 13 and the operating rod 14 are electrically connected to the control unit.

[0042] The stamping mechanism 3 is mainly a multi-layer stamping mechanism. Stamping mechanisms 3 with different curvatures are nested through slots. Using the operating lever 14, stamping mechanisms 3 of different specifications are inserted and pushed to move non-stamping mechanisms away from the working area, exposing the required stamping mechanism 3 on the working slot 4. The slot on the stamping mechanism 3 is an extended structure, and the extended part is twice the length of the stamping mechanism 3. A part of the structure extends out on one side of the surface. This structure contacts the upper surface of the working slot 4 during the operation of the stamping mechanism 3. The stamping mechanism 3 can be adjusted according to the specific workpiece size required. A part of the structure extends out on one side of the stamping mechanism 3.

[0043] like Figure 9As shown, the working groove 4 is a replaceable structure. According to the specifications of the stamping mechanism 3, it is engaged by a sliding groove set on the edge of the cleaning mechanism 5. When the size of the stamped workpiece changes, the position of the engaging rod 143 is extended by the extension rod 141 on the operating rod 14, and then extended into the engaging hole 31. Then, the electromagnet 144 is energized by electrical control, so that the engaging rod 143 pushes the stamping mechanism 3 to overlap, thereby changing the size of the stamping mechanism 3. Then, the energization is deactivated, the electromagnet 144 is pulled out, and the stamping mechanism 3 is removed in the same way. After replacement, it can be locked to ensure the complete stamping process. The width of the working groove 4 is not less than the diameter of the stamping mechanism.

[0044] like Figure 10 As shown, the cleaning mechanism 5 presses the extrusion bladder 51 into the groove during the stamping process to discharge the gas in the extrusion bladder 51 from the groove through the air outlet 52 to the stamping position. The liquid in the liquid release mechanism 6 is a water-based lubricant. This structure is mainly used to eliminate the heat generated during the metal deformation process. At the same time, the use of lubricant can ensure the safety and quality of the workpiece during the stamping process. This structure is electrically connected to the control unit.

[0045] During operation, the workpiece to be processed is pushed to the upper surface of the working groove 4 by the pushing mechanism 25 within the filling structure. Based on the required workpiece curvature, the operating rod 14 is slidable using the slide rail 12 at the upper end of the support column 11, controlling the sliding of the locking rod at the lower end of the operating rod 14. After adjusting the angle, it is inserted into the insertion hole in the stamping mechanism 3 and locked. Then, driven by the operating rod, the size of the stamping mechanism changes. Through the extended slot, the stamping mechanism 3 for non-required sizes moves away from the working groove 4. Since the larger curvature stamping mechanism 3 is located in the center, when a smaller curvature stamping mechanism 3 is required, the larger stamping mechanism 3 is inserted. The small-radius size is fitted onto the outer surface of the large-radius stamping mechanism 3. Correspondingly, the working groove 4 is matched with the appropriate specifications of the current stamping mechanism 3 by the snap-fit ​​rod of the operating rod 14, so that stamping mechanisms 3 of different specifications can slide in the working groove 4. During the stamping process, water-based lubricating oil is released by the control unit according to the material of the specific stamped workpiece. During the stamping process, since one-third of the extrusion bladder 51 is located outside the groove, the extended structure of the stamping mechanism 3 has limited contact with the extrusion bladder 51, causing the extrusion bladder 51 to deform in advance, and the gas is discharged from the vent 52. Therefore, the working area can be cleaned before the stamping mechanism 3 works on the workpiece.

[0046] This structure is mainly to facilitate the transformation of the stamping mechanism 3. By nesting the stamping mechanism 3, workpieces of different specifications can be produced. In this implementation, since the operating lever 14 and the stamping mechanism 3 work simultaneously after nesting, the stability of the stamping mechanism 3 is guaranteed. Neither adjacent stamping mechanisms 3 will collide or shake due to non-integral nature.

[0047] Another optional punch includes a support 1, a filling mechanism 2, a stamping mechanism 3, a working groove 4, and a cleaning mechanism 5. The support 1 is located above the filling mechanism 2, which is fixedly connected to the working groove 4 to continuously supply material to it. The stamping mechanism 3 is fixed to the upper end of the support 1 and can be manually adjusted according to the specific application scenario and the required workpiece. The working groove 4 is located below the stamping mechanism 3 and corresponds to different sizes of the stamping mechanism 3. The working groove 4 can be flexibly adjusted and locked according to the specifications of the current stamping mechanism 3. The cleaning mechanism 5 is located on one side of the working groove 4. Used to clean the work area before each material processing, the filling mechanism 2, the stamping mechanism 3 and the working groove 4 are all electrically connected to the control unit; the main structure of the bracket 1 includes a support column 11, a slide rail 12, a plumb rod 13 and an operating rod 14. The upper end of the support column 11 is fixedly connected to the slide rail 12, the plumb rod 13 is slidably connected in the slide groove of the slide rail 12, and the other end of the plumb rod 13 is fixedly connected to the operating rod 14. The operating rod 14 is connected to the stamping mechanism 3 of different specifications. The stamping mechanism 3 can be changed by the telescopic function of the operating rod 14. The number of operating rods 14 is not less than 2. The plumb rod 13 and the operating rod 14 are electrically connected to the control unit.

[0048] The filling mechanism 2 includes a chassis 21, a sliding rail 22, a sliding rod 23, a support plate 24, and a pushing mechanism 25. The filling mechanism 2 is fixedly connected to the outer frame 41 of the working groove 4 and can continuously supply material to the working groove 4 through the pushing mechanism 25. The chassis 21 and the frame of the working groove 4 are at the same horizontal height and are fixedly connected. The sliding rail 22 is set on the upper surface of the chassis 21. Through the sliding rail 22, the two ends of the support plate 24 are placed inside the sliding rail 22, so that the two ends are pushed at the same time. The sliding rod 23 is located between the sliding rails 12, so that the material is continuously pushed in each processing process.

[0049] The stamping mechanism 3 is configured as a multi-layer stamping mechanism. The stamping mechanism 3 in the center is the axis, and the other stamping mechanisms 3 with different curvatures are placed coaxially with it and can be raised and lowered by the operating lever 14 to adapt to molds of different specifications. A part of the structure extends from one side of the upper surface of the stamping mechanism 3. This structure is used to directly contact the cleaning mechanism 5 on the upper surface of the working groove 4. The upper ends of adjacent stamping mechanisms 3 are engaged by protrusions so that adjacent stamping mechanisms 3 will not be misaligned due to the large pressure during the stamping process.

[0050] The working slot 4 is a replaceable structure. When the required size of the arc-shaped sheet metal workpiece changes, the stamping mechanism 3 is replaced by the magnetic component of the operating rod 14. Similarly, the working slot 4 is replaced by a sliding groove to change the specifications of the working slot. A cleaning structure is provided on one side of the working slot 4. The cleaning mechanism 5 includes a compression bladder 51 and an air outlet 52. A groove is provided on one side of the cleaning mechanism 5, and the compression bladder 51 is placed in the groove. When the compression bladder 51 is not working, that is, in the inflated state, one-third of the volume of the compression bladder 51 is located outside the groove, and the remaining two-thirds are located inside the groove. Multiple air outlets 52 are arranged around the inside of the groove to facilitate the normal discharge of gas from the compression bladder 51. The air outlets 52 of the cleaning mechanism 5 connect the groove and the working area, so that when the compression bladder 51 deforms, the gas can directly act on the metal debris in the working area. At the same time, a liquid release mechanism is provided on one side of the cleaning mechanism 5. A water-based lubricant can be released through this mechanism. The filling mechanism 2, the stamping mechanism 3, and the working slot 4 are all electrically connected to the control unit.

[0051] During the stamping process, the stamping mechanism 3 is nested by the action of the operating lever 14, so that the stamping mechanism 3 with a larger arc is placed in the position of the central stamping mechanism 3, thus making the nested stamping mechanism 3 form a whole. This process is repeated sequentially, and the other parts are the same as above. The following will not be elaborated further.

[0052] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as defined by the appended claims and their equivalents.

Claims

1. A stamping die for an arc-shaped sheet metal workpiece, comprising a bracket (1), a filling mechanism (2), a stamping mechanism (3), a working groove (4), a cleaning mechanism (5), and a support mechanism (7); characterized in that: The support (1) is connected to the filling mechanism (2) via the support column (11). The filling mechanism (2) is installed on the side wall of the working groove (4) and pushes the material into the working groove (4) via the sliding rod (23). The stamping mechanism (3) is connected to the support (1) via the snap rod (143) and drives the punch (34) to change size by moving the operating rod (14), thereby changing the angle between the tension rod (36) and the support column (35). The working groove (4) is located at the lower end of the stamping mechanism (3). The cleaning mechanism (5) is installed inside the working groove (4) and increases the surrounding gas flow rate by squeezing the squeezing bladder (51) before each material processing.

2. The stamping die for an arc-shaped sheet metal workpiece according to claim 1, characterized in that: The stamping mechanism (3) includes an outer frame (32), a hydraulic cylinder (33), a punch (34), a support column (35), and a tension rod (36); the outer frame (32) is provided with a support column (35) and a tension rod (36), the punch (34) is connected to the bottom of the outer frame (32), the support column (35) is installed on the top of the punch (34), the two ends of the punch (34) are hinged to the tension rod (36), the hydraulic cylinder (33) is located on the top of the support column (35), and the support column (35) and the tension rod (36) form a triangular structure; the punch (34) is composed of multiple nested parts and is set as a semi-arc structure, wherein each layer of punch (34) is provided with a snap-fit ​​hole (31) on both sides.

3. The stamping die for an arc-shaped sheet metal workpiece according to claim 2, characterized in that: The upper end of the punch (34) is provided with a spiral hole (341), the spiral hole (341) is rotatably connected to the support column (35), the upper end of the punch (34) is connected with a rack (342), the rack (342) is engaged with the snap sleeve (351) at the lower end of the support column (35), and the rack (342) is provided in two and is connected to punches (34) of different specifications respectively.

4. The stamping die for an arc-shaped sheet metal workpiece according to claim 1, characterized in that: The support (1) includes a support column (11), a slide rail (12), a vertical rod (13), and an operating rod (14). The upper end of the support column (11) is fixedly connected to the slide rail (12). The vertical rod (13) is slidably connected in the slide groove (15) of the slide rail (12). The other end of the vertical rod (13) is fixedly connected to the operating rod (14). There are two operating rods (14). The lower end of the operating rod (14) is horizontally slidably connected to a sliding rod (23). The two ends of the sliding rod (23) are respectively fixedly connected to a receiving block (142). A snap-fit ​​rod (143) is slidably connected in the receiving block (142). The snap-fit ​​rod (143) is slidably snapped into the snap-fit ​​hole (31). An electromagnet (144) is provided at the snap-fit ​​end of the snap-fit ​​rod (143) and the snap-fit ​​hole (31).

5. The stamping die for an arc-shaped sheet metal workpiece according to claim 1, characterized in that: The filling mechanism (2) includes a chassis (21), a sliding rail (22), a sliding rod (23), a support plate (24), and a pushing mechanism (25). The chassis (21) is fixedly connected to one side of the working groove (4). The sliding rail (22) is fixedly connected to the upper surface of the chassis (21). The sliding rod (23) is placed parallel to the sliding rail (22). The support plate (24) is placed at the upper end of the sliding rail (22) and its two ends are fitted with the sliding rail (22). The pushing mechanism (25) is located at the end of the sliding rod (23) near the working groove (4).

6. The stamping die for an arc-shaped sheet metal workpiece according to claim 1, characterized in that: The working groove (4) is a semi-circular groove, and the other side of the working groove (4) is engaged with the cleaning mechanism (5).

7. The stamping die for an arc-shaped sheet metal workpiece according to claim 1, characterized in that: The cleaning mechanism (5) includes a squeezing bladder (51) and an air outlet (52). A rectangular groove (53) is provided on the upper surface of the cleaning mechanism (5). The squeezing bladder (51) is located in the rectangular groove (53). The air outlet (52) connects the rectangular groove (53) with the working area of ​​the working groove (4).

8. The stamping die for an arc-shaped sheet metal workpiece according to claim 7, characterized in that: The air outlets (52) are arranged in a ring array around the inner wall of the groove, and the gas flow direction is perpendicular to the side of the stamping mechanism (3). The number of air outlets (52) is set to multiple.

9. A stamping die for an arc-shaped sheet metal workpiece according to claim 7, characterized in that: The cleaning mechanism (5) is equipped with a liquid release mechanism (6) at both ends, and the liquid is a water-based lubricant.

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