A die cutting jig for a rubber piece

Abstract

The utility model relates to rubber part punching technology field, concretely relates to a kind of punching clamp for rubber part.It includes lower base and the upper top that is set on the upside of lower base, and lower base includes fixed plate, and the upside of fixed plate is fixedly installed with bottom plate by two cushion blocks, and bottom plate is provided with placing groove, and several cutter cavities are evenly opened in the bottom of placing groove, and lower punch is fixed in the inside of cutter cavity.The utility model is assembled by several upper punches and lower punches, so that the overall clamp has the effect of breaking down a large whole into parts, when some upper punch or lower punch is damaged, the damaged upper punch or lower punch is replaced, the cost of replacing the clamp after wear is reduced, and different sizes of lower punch and upper punch are replaced, so that the clamp set can punch different size requirements of rubber parts, so that a set of clamp can be reused, and the cost of clamp production is reduced.

Description

Technical Field

[0001] This utility model relates to the field of rubber part punching technology, specifically, to a punching fixture for rubber parts. Background Technology

[0002] When punching rubber parts, the rubber part is usually placed on the lower die base, and then the corresponding punching blade is installed on the upper die base for punching. However, the punching blade is manufactured as a single piece. After punching on the lower and upper dies for a long time, the punching blade will wear down, resulting in dimensional differences in the punched rubber parts. Because it is a single piece, when one of the punching blades is damaged, the entire fixture needs to be replaced, which leads to high replacement costs. At the same time, each fixture punches a fixed size and can only punch the corresponding rubber parts, resulting in poor adaptability. When punching other sizes is required, a new fixture needs to be replaced, resulting in poor fixture compatibility. In addition, due to the elasticity of the rubber parts themselves, when the punched rubber parts are thick, the elastic deformation of the rubber parts can easily lead to large dimensional differences, resulting in inaccurate dimensions of the punched rubber parts. Utility Model Content

[0003] The purpose of this invention is to provide a punching fixture for rubber parts to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides a punching fixture for rubber parts, including a lower base and an upper top seat disposed on the upper side of the lower base. The lower base includes a fixing plate, and a bottom plate is fixedly mounted on the upper side of the fixing plate by two pads. The bottom plate is provided with a placement groove, and a plurality of blade cavities are evenly formed at the bottom of the placement groove. A lower punch is fixed inside the blade cavity, and the upper end of the lower punch extends out of the blade cavity. A plurality of upward pushing mechanisms corresponding to the positions of the lower punches are provided between the fixing plate and the bottom plate. The upper top seat includes a top plate and a fixed... A mounting plate is fixed on the upper side of the top plate. A pushing mechanism is provided between the top plate and the mounting plate. The top plate has several threaded connection holes corresponding to the positions of the blade chambers. A double-ended helical tube is threaded into the internal thread of each threaded connection hole. An upper punch is threaded into the lower end of the double-ended helical tube. When the upper top seat moves down, the pushing mechanism presses the rubber part. The upper and lower punches cut the rubber part. As the upper top seat moves away from the lower base, the pushing mechanism pushes the cut rubber part down, and the pushing mechanism pushes the cut rubber part up.

[0005] As a further improvement to this technical solution, the inner diameter of the upper punch and the outer diameter of the lower punch are the same, and an upper blade groove is provided in the blade cavity near the placement groove. The upper punch enters the interior of the upper blade groove during the process of punching the rubber part.

[0006] As a further improvement to this technical solution, the upward pushing mechanism includes an upper top post that is slidably inserted into the lower punch. The upper end of the upper top post and the top of the lower punch are on the same horizontal plane, and the lower end of the upper top post penetrates the bottom plate and extends outward.

[0007] As a further improvement to this technical solution, an upward push spring is provided between the upper side of the fixing plate and the lower side of the upper top column. The upward push spring pushes the upper top column to move upward, so that the top of the upper top column is flush with the top of the lower punch.

[0008] As a further improvement to this technical solution, the mounting plate is raised upwards, the upper side of the top plate is recessed downwards, and the pushing mechanism is disposed in the space between the top plate and the mounting plate.

[0009] As a further improvement to this technical solution, the pushing mechanism includes a spring cap threadedly connected to the mounting plate, a pushing rod slidably disposed inside the double-ended helical tube, and a pushing spring disposed between the pushing rod and the spring cap, the pushing spring pushing the pushing rod downward.

[0010] As a further improvement to this technical solution, the upper side of the double-ended solenoid penetrates the top plate and is fixed with a polygonal ring. The inside of the polygonal ring is hexagonal. The upper end of the lower push rod is fixed with a sliding block whose shape matches the inside shape of the polygonal ring. The sliding block slides up and down inside the polygonal ring.

[0011] As a further improvement to this technical solution, when the upper top seat is not in use, the sliding block and the upper side of the double-ended helical tube are in contact, and the lower end of the lower push rod is located on the lower side of the upper punch. When the upper top seat punches the rubber part, the lower push rod first contacts the rubber part. When the upper top seat punches the rubber part, the lower push rod pushes the punched rubber part downward, and the upper top column pushes the punched rubber part upward.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. In this punching fixture for rubber parts, several upper and lower punches are assembled to make the whole fixture have the effect of being broken down into parts. When one of the upper or lower punches is damaged, the damaged upper or lower punch can be replaced, reducing the cost of replacing the fixture after wear. At the same time, by replacing the lower and upper punches of different sizes, this set of fixtures can punch rubber parts with different size requirements, so that a set of fixtures can be reused, reducing the cost of fixture manufacturing.

[0013] 2. In this punching fixture for rubber parts, as the upper top seat approaches the lower base, several lower push rods first contact the rubber part, pressing it down to position it. Then, the upper punch head contacts the rubber part, allowing the upper and lower punches to work together to punch the rubber part. Simultaneously, while the upper and lower punches are punching the rubber part, a pressure frame further presses it down to further position it. Both the lower and upper punches extend outwards, allowing for the punching of thicker rubber parts to proceed with a certain depth before fixing the part and then punching again. This reduces deformation during punching of thicker rubber parts and improves the dimensional accuracy of the punched rubber parts.

[0014] 3. In this punching fixture for rubber parts, after the lower base and upper top seat have finished punching, the upward pushing mechanism pushes the rubber part in the lower punch upward, causing the rubber part to detach from the lower punch, while the downward retraction mechanism pushes the rubber part in the upper punch downward, causing the rubber part to come out of the upper punch. This achieves the effect that the punched rubber part does not move with the upper top seat, making it convenient for workers to collect the punched rubber parts. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the lower base structure of the utility model; Figure 3 This is a schematic diagram of the exploded structure of the lower base of the utility model. Figure 4 This is one of the cross-sectional structural diagrams of the lower base of the utility model; Figure 5 This is the second sectional view of the lower base of this utility model; Figure 6 This is a schematic diagram of the upper support structure of the utility model; Figure 7 This is a schematic diagram of the exploded structure of the upper support of the utility model. Figure 8 This is one of the schematic cross-sectional views of the upper support structure of the utility model; Figure 9 This is the second schematic diagram of the cross-sectional structure of the upper support of the utility model.

[0016] The meanings of the labels in the diagram are as follows: 1. Lower base; 11. Fixing plate; 111. Pad block; 12. Base plate; 13. Lower punch; 14. Upper top post; 15. Blade cavity; 151. Upper blade groove; 16. Guide post; 161. Rubber pad; 17. Upper push spring; 2. Top seat; 21. Top plate; 211. Pressure frame; 22. Mounting plate; 23. Polygonal ring; 231. Double-ended threaded tube; 24. Spring cap; 25. Upper punch; 26. Lower push spring; 27. Lower push rod; 28. Threaded connection hole; 3. Mounting bracket. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0019] Example 1 Please see Figures 1-9As shown, this embodiment provides a punching fixture for rubber parts, including a lower base 1 and an upper top seat 2 disposed on the upper side of the lower base 1. The lower base 1 includes a fixing plate 11, which is mounted on the worktable of a punching machine. A base plate 12 is fixedly mounted on the upper side of the fixing plate 11 by two pads 111. A space is formed between the fixing plate 11, the base plate 12, and the two pads 111. Several upward pushing mechanisms corresponding to the positions of the lower punch 13 are disposed between the fixing plate 11 and the base plate 12. In the space between the fixed plate 11 and the base plate 12, a placement groove is provided on the base plate 12, and several blade cavities 15 are evenly opened at the bottom of the placement groove. A lower punch 13 is fixed inside the blade cavity 15. The upper top seat 2 includes a top plate 21 and a mounting plate 22 fixed on the upper side of the top plate 21. A mounting bracket 3 fixed on the top plate 21 is provided on the upper side of the mounting plate 22. The mounting bracket 3 is fixedly connected to the piston end of the stamping machine. A pushing mechanism is provided between the top plate 21 and the mounting plate 22. The positions of the pushing mechanism and the pushing mechanism are... Correspondingly, the mounting plate 22 bulges upward, and the upper side of the top plate 21 is recessed downward. The pushing mechanism is located in the space between the top plate 21 and the mounting plate 22. Several threaded connection holes 28 corresponding to the positions of the blade cavity 15 are provided on the top plate 21. The positions of the threaded connection holes 28 correspond to the positions of the pushing mechanism, that is, the central axes of the lower punch 13, the blade cavity 15, the pushing mechanism, the upper pushing mechanism, and the threaded connection holes 28 are on the same straight line. The threaded connection holes 28 are internally threaded with double-ended helical tubes 231. The lower end of the tube 231 is threaded with an upper punch 25. The inner diameter of the upper punch 25 is the same as the outer diameter of the lower punch 13, meaning that the upper punch 25 can be slidably sleeved on the outside of the lower punch 13. At the same time, the cutting edge of the upper punch 25 is inclined from the inside to the outside, and the cutting edge of the lower punch 13 is inclined from the outside to the inside. That is, the cutting edges of the upper punch 25 and the lower punch 13 are on the same circular curved surface. When the lower punch 13 and the upper punch 25 punch the rubber part, a good shearing effect on the rubber part can be achieved.

[0020] As the upper top seat 2 moves downward, the pushing mechanism presses down on the rubber part to position it. Then, the upper punch 25 and the lower punch 13 punch the rubber part. As the upper top seat 2 moves away from the lower base 1, the pushing mechanism pushes the punched rubber part downward, and the pushing mechanism pushes the punched rubber part upward, preventing the punched rubber part from being fixed in the lower punch 13 or the upper punch 25, thus eliminating the trouble for workers to collect the punched rubber part.

[0021] The upward pushing mechanism includes an upper push post 14 that is slidably inserted into the lower punch 13. When the lower base 1 is not in use, the upper end of the upper push post 14 and the top of the lower punch 13 are on the same horizontal plane. The lower end of the upper push post 14 passes through the base plate 12 and extends outward. A baffle is fixed to one end of the upper push post 14 that extends to the lower side of the base plate 12. An upward pushing spring 17 is provided between the upper side of the fixing plate 11 and the lower side of the upper push post 14. The upward pushing spring 17 pushes the upper push post 14 to move upward, so that the top of the upper push post 14 is flush with the top of the lower punch 13.

[0022] The push mechanism includes a spring cap 24 threaded onto the mounting plate 22. The upper side of the double-ended screw tube 231 passes through the top plate 21 and is fixed with a polygonal ring 23. The polygonal ring 23 is located on the upper side of the top plate 21. The worker can use a wrench to tighten the double-ended screw tube 231 onto the top plate 21. A push rod 27 is slidably arranged inside the double-ended screw tube 231. The lower end of the push rod 27 slides through the lower side of the double-ended screw tube 231 and extends to the lower side of the upper punch 25. A push spring 26 is arranged between the push rod 27 and the spring cap 24. The push spring 26 pushes the push rod 27 downward.

[0023] To ensure the stability of the push spring 17 and the push spring 26, spring grooves are provided on the fixed plate 11, the bottom of the corresponding baffle, the spring cap 24, and one end of the corresponding push rod 27. The ends of the push spring 17 and the push spring 26 are respectively placed in the corresponding spring grooves.

[0024] The interior of the polygonal ring 23 is hexagonal. The upper end of the lower push rod 27 is fixed with a sliding block whose shape matches the interior shape of the polygonal ring 23. The sliding block slides up and down inside the polygonal ring 23. The sliding block and the interior of the polygonal ring 23 slide in a matching manner to ensure the stability of the sliding of the lower push rod 27.

[0025] When the upper top seat 2 is not in use, the sliding block and the upper side of the double-ended screw tube 231 are in contact, and the lower end of the lower push rod 27 is located below the upper punch 25. When the upper top seat 2 punches the rubber part, the lower push rod 27 first contacts the rubber part. When the upper top seat 2 punches the rubber part, the lower push rod 27 pushes the punched rubber part downward, and the upper top column 14 pushes the punched rubber part upward.

[0026] Meanwhile, guide posts 16 are fixed at the four corners of the upper side of the base plate 12, and rubber pads 161 are fitted on the guide posts 16. The four corners of the top plate 21 are provided with through holes that match the guide posts 16. When the upper top seat 2 punches the rubber parts, the guide posts 16 guide the downward trajectory of the top plate 21 to ensure the accuracy of the downward position of the top plate 21.

[0027] When using this device, the worker places the rubber part to be punched in the placement groove. The bottom of the rubber part contacts the top of several lower punches 13 and the upper top post 14. At this time, the rubber part is horizontally positioned. Then, the upper top seat 2 moves downwards closer to the lower base 1. During this process, the bottom of the lower push rod 27 first contacts the upper surface of the rubber part, causing the lower push spring 26 to press against the rubber part. Then, the upper top seat 2 continues to move downwards, at which point the lower push rod 27 moves upwards, causing the bottom of the upper punch 25 to contact the rubber part. Then, the lower punches 13 and the upper punch 25 punch the rubber part. After punching, the lower side of the upper punch 25 and the upper side of the lower punch 13 are on the same plane. The rubber part being punched is pushed downward by the lower push rod 27, while the upper push rod 14 pushes the rubber part upward. After the rubber part is punched, it is located between the upper punch 25 and the lower punch 13. When the upper push seat 2 moves away from the lower base 1, the upper push rod 14 pushes the punched rubber part upward, while the lower push rod 27 pushes the punched rubber part downward, so that the rubber part is separated from the lower punch 13 and the upper punch 25. When the upper push seat 2 moves away, the punched rubber part will not remain in the lower punch 13 or the upper punch 25, avoiding the trouble of workers having to manually collect the rubber part if it remains in the lower punch 13 or the upper punch 25.

[0028] When one of the lower punches 13 or upper punches 25 is damaged, the corresponding lower punch 13 or upper punch 25 can be replaced, which eliminates the trouble of replacing the entire fixture and reduces the replacement cost. At the same time, when it is necessary to punch rubber parts of different sizes, only the lower punch 13 and upper punch 25 of the corresponding size need to be replaced, so that this fixture can be used for different production needs.

[0029] Example 2 refer to Figures 1-9Because rubber parts are inherently elastic, when punching thicker rubber parts, the cut-off middle section is prone to dimensional variations due to elasticity changes, leading to inaccurate dimensions in the produced rubber parts. To reduce these dimensional variations, the upper end of the lower punch 13 extends from the blade cavity 15, positioning the blade head of the lower punch 13 above the bottom of the placement groove. An upper blade groove 151 is formed near the placement groove in the blade cavity 15. The upper blade groove 151 is slightly larger than the upper punch 25, allowing the upper punch 25 to slide up and down within the upper blade groove 151, thus punching the rubber part. During the process, it enters the interior of the upper blade groove 151. At the same time, a pressure frame 211 is fixed at the bottom of the top plate 21. Several upper punches 25 are located inside the pressure frame 211, and the bottom of the pressure frame 211 is higher than the bottom of the upper punches 25. At this time, the lower side of the upper punches 25 and the upper side of the lower punches 13 both extend out. When the upper top seat 2 moves down, one end of the lower punches 13 and the upper punches 25 first punches a part of the rubber part, and then the pressure frame 211 punches the rubber part again to improve the stability of the rubber part. At this time, the thickness of the rubber part punched can be shortened, thereby reducing the difference in the middle dimension when punching thicker rubber parts.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A punching fixture for rubber parts, comprising a lower base (1) and an upper top seat (2) disposed on the upper side of the lower base (1), characterized in that: The lower base (1) includes a fixing plate (11). A base plate (12) is fixedly installed on the upper side of the fixing plate (11) by two pads (111). The base plate (12) is provided with a placement groove, and a plurality of blade cavities (15) are evenly opened at the bottom of the placement groove. A lower punch (13) is fixed inside the blade cavity (15). A plurality of upward pushing mechanisms corresponding to the positions of the lower punch (13) are provided between the fixing plate (11) and the base plate (12). The upper top base (2) includes a top plate (21) and a mounting plate (22) fixed on the upper side of the top plate (21). The top plate (21) and the mounting plate (22) A push mechanism is provided between them. The top plate (21) has several threaded connection holes (28) corresponding to the position of the blade cavity (15). The threaded connection holes (28) are connected to a double-ended helical tube (231) by threads. The lower end of the double-ended helical tube (231) is connected to an upper punch (25). When the upper top seat (2) moves down, the push mechanism presses the rubber part. The upper punch (25) and the lower punch (13) punch the rubber part. As the upper top seat (2) moves away from the lower base (1), the push mechanism pushes the punched rubber part down, and the push mechanism pushes the punched rubber part up.

2. The punching fixture for rubber parts according to claim 1, characterized in that: The inner diameter of the upper punch (25) is the same as the outer diameter of the lower punch (13), and the upper knife groove (151) is provided in the knife cavity (15) near the placement groove. The upper punch (25) enters the interior of the upper knife groove (151) during the process of punching the rubber part.

3. The punching fixture for rubber parts according to claim 1, characterized in that: The upward pushing mechanism includes an upper top post (14) that is slidably inserted into the lower punch (13). The upper end of the upper top post (14) and the top of the lower punch (13) are on the same horizontal plane. The lower end of the upper top post (14) penetrates the bottom plate (12) and extends outward.

4. The punching fixture for rubber parts according to claim 3, characterized in that: An upward push spring (17) is provided between the upper side of the fixed plate (11) and the lower side of the upper top column (14). The upward push spring (17) pushes the upper top column (14) to move upward, so that the top of the upper top column (14) is flush with the top of the lower punch (13).

5. The punching fixture for rubber parts according to claim 1, characterized in that: The mounting plate (22) is raised upwards, the upper side of the top plate (21) is recessed downwards, and the pushing mechanism is disposed in the space between the top plate (21) and the mounting plate (22).

6. The punching fixture for rubber parts according to claim 5, characterized in that: The push mechanism includes a spring cap (24) threaded onto the mounting plate (22), a push rod (27) slidably disposed inside the double-ended helical tube (231), and a push spring (26) disposed between the push rod (27) and the spring cap (24), the push spring (26) pushing the push rod (27) downward.

7. The punching fixture for rubber parts according to claim 6, characterized in that: The upper side of the double-ended solenoid (231) passes through the top plate (21) and is fixed with a polygonal ring (23). The interior of the polygonal ring (23) is hexagonal. The upper end of the lower push rod (27) is fixed with a sliding block whose shape matches the interior shape of the polygonal ring (23). The sliding block slides up and down inside the polygonal ring (23).

8. The punching fixture for rubber parts according to claim 6, characterized in that: When the upper top seat (2) is not in use, the sliding block and the upper side of the double-ended screw tube (231) are in contact, and the lower end of the lower push rod (27) is located below the upper punch (25). When the upper top seat (2) punches the rubber part, the lower push rod (27) first contacts the rubber part. When the upper top seat (2) punches the rubber part, the lower push rod (27) pushes the punched rubber part downward, and the upper top column (14) pushes the punched rubber part upward.

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