Valve oil seal skeleton stamping die

Abstract

This utility model relates to the field of stamping die technology, specifically a stamping die for valve stem seal skeletons. It includes a lower die body and an upper die body. The upper die body is connected to a punch press. The top of the lower die body is provided with several lower backing plates via bolts. After unscrewing the bolts, the lower backing plates can be rearranged on the lower die body. The top of each lower backing plate is provided with several forming holes. The bottom of the upper die body is connected with several punches via bolts. After unscrewing the bolts, the punches can be rearranged on the upper die body. The shapes of the punches are adapted to the forming holes, and their positions correspond. The diameter of each punch is smaller than the diameter of the corresponding forming hole. This utility model, by setting repositionable forming holes and punches, allows for the stamping of valve stem seal skeletons of different shapes using the same batch of punches and forming holes, without the need to replace the entire stamping die, thus reducing costs.

Description

Technical Field

[0001] This utility model relates to the field of stamping die technology, and in particular to stamping dies for valve oil seal skeletons. Background Technology

[0002] Valve stem seals are crucial sealing elements in the engine's valve train. Installed atop the valve guide, they prevent engine oil from entering the combustion chamber through the gap between the valve stem and the guide, while ensuring adequate lubrication of the valve stem. The valve stem seal skeleton is the core supporting component, maintaining the seal's shape stability and ensuring sealing performance. Most valve stem seal skeletons on the market are produced using stamping dies. However, existing stamping dies cannot adjust the positions of multiple extruded parts. Different arrangements of the extruded parts result in products of different shapes. When the stamped shape requires a different arrangement sequence, the corresponding die must be changed, which is detrimental to cost reduction. Utility Model Content

[0003] The main purpose of this invention is to provide a stamping die for valve stem seal skeletons to solve the problems raised in related technologies.

[0004] To achieve the above objectives, according to one aspect of the present invention, a valve stem seal skeleton stamping die is provided, comprising a lower die body and an upper die body. The upper die body is connected to a punch press. A plurality of lower pads are fixed to the top of the lower die body by bolts. After unscrewing the bolts, the lower pads can be rearranged on the lower die body. A plurality of forming holes are provided on the top of the lower pads. A plurality of punches are connected to the bottom of the upper die body by bolts. After unscrewing the bolts, the punches can be rearranged on the upper die body. The shapes of the punches are adapted to the forming holes, and their positions correspond. The diameter of the punches is smaller than the diameter of the corresponding forming holes.

[0005] Furthermore, a plurality of lower guide posts are fixedly provided on the top of the lower mold body, and a plurality of upper guide sleeves are fixedly provided on the bottom of the upper mold body. The lower guide posts and the upper guide sleeves correspond one to one. The lower guide posts extend into the upper guide sleeves, and the upper guide sleeves guide the lower guide posts.

[0006] Furthermore, the lower guide post is located at the corner of the lower mold body, and the upper guide sleeve is located at the corner of the upper mold body. Furthermore, several upper pads are fixed to the bottom of the upper mold body by bolts, and the punches all pass through the upper pads and are slidably connected to the upper pads.

[0007] Furthermore, the bottom of the upper pad is fixedly provided with several upper guide posts, and the top of the lower pad is fixedly provided with several lower guide sleeves. The lower guide sleeves correspond one-to-one with the upper guide posts, the upper guide posts extend into the lower guide sleeves, and the lower guide sleeves guide the upper guide posts.

[0008] Furthermore, the upper guide post is located at the edge of the upper pad, and the lower guide sleeve is located at the edge of the lower pad.

[0009] Furthermore, a middle pad is fixedly provided on the upper surface of the lower pad plate, and a plurality of stripping cylinders are provided through the middle pad plate. The stripping cylinders correspond to the positions of the punches, and the punches extend into the corresponding stripping cylinders and can slide up and down inside the stripping cylinders.

[0010] Furthermore, the inner diameter of each stripping cylinder is larger than the outer diameter of the corresponding punch.

[0011] Furthermore, both the lower mold body and the upper mold body are provided with multiple screw holes, and the screw holes of all the lower and upper pads are in the same position.

[0012] Furthermore, a spring is fixedly provided on the top of the punch, and the top end of the spring is connected to the bottom surface of the upper mold body.

[0013] Compared with the prior art, the present invention has the following beneficial effects: This invention, by setting up repositionable forming holes and punches, allows valve oil seal skeletons of different shapes to be punched out using the same batch of punches and forming holes, without the need to replace the entire stamping die, which helps to reduce costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall design of this utility model; Figure 2 This is a schematic diagram of the lower mold structure of this utility model; Figure 3 This is a schematic diagram of the upper mold structure of this utility model; Figure 4 This is an exploded view of the lower mold of this utility model.

[0015] Figure label: 1. Lower mold body; 2. Upper mold body; 3. Feeding port; 4. Forming hole; 5. Lower guide bush; 6. Lower guide post; 7. Lower pad; 8. Upper guide bush; 9. Upper guide post; 10. Upper pad; 11. Stripper barrel; 12. Punch; 13. Middle pad. Detailed Implementation

[0016] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0017] This embodiment provides a valve stem seal skeleton stamping die, such as Figure 1As shown, it includes a lower mold body 1 and an upper mold body 2. The upper mold body 2 is connected to the punch press. The top of the lower mold body 1 is fixed with several lower pads 7 by bolts. After unscrewing the bolts, the lower pads 7 can be rearranged on the lower mold body 1. The top of the lower pads 7 is provided with several forming holes 4. The bottom of the upper mold body 2 is connected with several punches 12 by bolts. After unscrewing the bolts, the punches 12 can be rearranged on the upper mold body 2. The shape of the punches 12 is adapted to the forming holes 4, and their positions are corresponding. The diameter of the punches 12 is smaller than the diameter of the corresponding forming holes 4.

[0018] like Figure 2 As shown, several lower guide pillars 6 are fixedly provided on the top of the lower mold body 1, such as... Figure 3 As shown, several upper guide sleeves 8 are fixedly provided at the bottom of the upper mold body 2. The lower guide post 6 corresponds to the upper guide sleeve 8 one by one, and the lower guide post 6 extends into the upper guide sleeve 8. The upper guide sleeve 8 has a guiding function for the lower guide post 6.

[0019] Several lower guide sleeves 5 are fixedly provided on the top of the lower pad 7, and several upper guide posts 9 are fixedly provided on the bottom of the upper pad 10. The lower guide sleeves 5 and the upper guide posts 9 correspond one-to-one, and the upper guide posts 9 extend into the lower guide sleeves 5. The lower guide sleeves 5 have a guiding function for the upper guide posts 9.

[0020] The bottom of the upper mold body 2 is fixed with several upper pads 10 by bolts, and the punches 12 all pass through the upper pads 10 and are slidably connected to the upper pads 10.

[0021] A middle pad 13 is fixedly provided on the upper surface of the lower pad 7, such as Figure 4 As shown, a plurality of stripping cylinders 11 are provided through the middle pad plate 13. The stripping cylinders 11 correspond to the positions of the punch 12 and the forming hole 4. The inner hole shape of the stripping cylinder 11 is adapted to the shape of the punch 12.

[0022] The inner diameter of the stripping cylinder 11 is larger than the outer diameter of the corresponding punch 12.

[0023] The punch 12 extends into the corresponding stripping cylinder 11 and can slide up and down inside the stripping cylinder 11. After the stamping is completed, when the punch 12 retracts from the stripping cylinder 11, the stripping cylinder 11 remains fixed, blocking the stamping waste at the end of the punch 12 and preventing the stamping waste from following the punch 12 into the upper pad 10, which would cause the upper pad 10 to wear.

[0024] A spring is fixedly installed on the top of the punch 12. The top of the spring is connected to the bottom surface of the upper die 2. During punching, the spring contracts to reduce the impact force on the punch 12. When the spring is fully contracted, the bottom of the punch 12 can extend into the forming hole 4 to punch the strip. A connecting block is fixedly installed on the top of the spring. The connecting block is fixedly connected to the bottom surface of the upper die 2 by bolts, which facilitates changing the position of the spring.

[0025] The outer diameter of the lower guide post 6 is slightly smaller than the inner diameter of the upper guide sleeve 8. The upper guide sleeve 8 corresponds to the lower guide post 6, ensuring that the lower guide post 6 can slide up and down inside the upper guide sleeve 8.

[0026] The outer diameter of the upper guide post 9 is slightly smaller than the outer diameter of the lower guide sleeve 5. The upper guide post 9 corresponds to the lower guide sleeve 5, ensuring that the upper guide post 9 can slide up and down inside the lower guide sleeve 5. The lower guide sleeve 5 passes through the middle pad 13, allowing the upper guide post 9 to extend into the lower guide sleeve 5.

[0027] During stamping, the lower guide post 6 extends into the corresponding upper guide sleeve 8, and the upper guide post 9 extends into the corresponding lower guide sleeve 5, so that the upper mold body 2 moves downward in the vertical direction for stamping, ensuring the stamping accuracy.

[0028] Both the lower mold body 1 and the upper mold body 2 are provided with multiple screw holes. All the screw holes of the lower pad 7 and the upper pad 10 are in the same position. When adjusting the position of the upper pad 10 and the lower pad 7, they can be aligned with the screw holes on the lower mold body 1 and the upper mold body 2.

[0029] A material receiving cavity is formed between the lower pad 7 and the middle pad 13. A feeding port 3 is provided at the end of the material receiving cavity. The width of the feeding port 3 and the material receiving cavity is slightly larger than the width of the material strip to ensure that the material strip can be smoothly inserted and will not shake in the material receiving cavity, thus ensuring the accuracy of valve oil seal skeleton forming.

[0030] The material strip can be fed into the material receiving cavity from the feeding port 3 and positioned above the forming hole 4. The punch press is started, and the punch press drives the punch 12 to move up and down. The punch 12 moves down and passes through the corresponding stripping cylinder 11 into the forming hole 4, punching out the corresponding shape on the material strip. After the punching is completed, when the punch 12 retracts from the stripping cylinder 11, the stripping cylinder 11 is fixed and blocks the punching waste at the end of the punch 12, preventing the punching waste from following the punch 12 into the upper pad 10 and causing the upper pad 10 to wear.

[0031] When it is necessary to change the position of the stamped shape on the valve stem seal skeleton, remove all the upper pads 10, springs and punches 12, change the arrangement order of the upper pads 10 on the upper mold body 2, so that the shape of the punches 12 in the upper pads 10 corresponds to the holes and slots on the valve stem seal skeleton; then remove all the lower pads 7 on the lower mold body 1, rearrange the position of the lower pads 7 on the lower mold body 1, so that the shape of the forming holes 4 on them corresponds to the punches 12, and valve stem seal skeletons of different shapes can be stamped out.

[0032] By setting the repositionable forming hole 4 and punch 12, valve oil seal skeletons of different shapes can be punched out using the same batch of punches 12 and forming holes 4 without replacing the entire stamping die, which helps to reduce costs.

[0033] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A valve stem seal skeleton stamping die, comprising a lower die body (1) and an upper die body (2), wherein the upper die body (2) is connected to a punch press, characterized in that, The lower mold body (1) is connected to a number of lower pads (7) by bolts at the top. The lower pads (7) are provided with a number of forming holes (4) at the top. The lower mold body (1) is configured such that the lower pads (7) can be rearranged on the lower mold body (1) after the bolts are unscrewed. The upper mold body (2) is connected to a number of punches (12) by bolts at the bottom. The upper mold body (2) is configured such that the punches (12) can be rearranged on the upper mold body (2) after the bolts are unscrewed. The shape of the punches (12) is adapted to the forming holes (4) and their positions are corresponding. The diameter of the punches (12) is smaller than the diameter of the corresponding forming holes (4).

2. The valve oil seal carrier stamping die of claim 1, wherein, The lower mold body (1) is fixedly provided with several lower guide posts (6) at the top, and the upper mold body (2) is fixedly provided with several upper guide sleeves (8) at the bottom. The lower guide posts (6) correspond one-to-one with the upper guide sleeves (8). The lower guide posts (6) extend into the upper guide sleeves (8), and the upper guide sleeves (8) have a guiding function for the lower guide posts (6).

3. The valve oil seal carrier stamping die of claim 2, wherein, The lower guide post (6) is located at the corner of the lower mold body (1), and the upper guide sleeve (8) is located at the corner of the upper mold body (2).

4. The valve oil seal carrier stamping die of claim 1, wherein, The bottom of the upper mold body (2) is fixed with several upper pads (10) by bolts, and the punches (12) all pass through the upper pads (10) and are slidably connected to the upper pads (10).

5. The valve seal carrier stamping die of claim 4, wherein, The bottom of the upper pad (10) is fixedly provided with several upper guide posts (9), and the top of the lower pad (7) is fixedly provided with several lower guide sleeves (5). The lower guide sleeves (5) correspond one-to-one with the upper guide posts (9). The upper guide posts (9) extend into the lower guide sleeves (5), and the lower guide sleeves (5) have a guiding function for the upper guide posts (9).

6. The valve seal carrier press die of claim 5, wherein, The upper guide post (9) is located at the edge of the upper pad (10), and the lower guide sleeve (5) is located at the edge of the lower pad (7).

7. The valve oil seal carrier stamping die of claim 1, wherein, The upper surface of the lower pad (7) is fixedly provided with a middle pad (13), and a plurality of stripping cylinders (11) are provided through the middle pad (13). The stripping cylinders (11) are positioned corresponding to the punches (12). The punches (12) extend into the corresponding stripping cylinders (11) and can slide up and down inside the stripping cylinders (11).

8. The valve oil seal carrier stamping die of claim 7, wherein, The inner diameter of each stripping cylinder (11) is larger than the outer diameter of the corresponding punch (12).

9. The valve oil seal carrier stamping die of claim 7, wherein, Both the lower mold body (1) and the upper mold body (2) are provided with multiple screw holes, and the screw hole positions of all the lower pads (7) and upper pads (10) are the same.

10. The valve oil seal carrier stamping die of claim 1, wherein, A spring is fixedly provided on the top of the punch (12), and the top of the spring is connected to the bottom surface of the upper mold body (2).

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