High-pressure oil pipe cold heading clamping die structure

Abstract

The utility model discloses a high-pressure oil pipe cold heading clamping die structure which comprises a high-pressure oil pipe cold heading clamping die assembly, a clamping die base, a first clamping air cylinder, a second clamping air cylinder, a second clamping die fixedly connected with one end of the first clamping air cylinder, and a first clamping die fixedly connected with one end of the second clamping air cylinder. The second clamping die is fixedly connected with a sliding block; the fixing frame comprises a top plate fixed to the clamping die base through screws and a fixing plate perpendicular to the top plate. The clamping die structure is provided with a buffering design enabling the first clamping die and the second clamping die to make flexible collision contact, under the supporting and limiting effects of the guide rail and the limiting plate, the positions of the sliding block and the second clamping die are stable, and when the first clamping die moves towards the second clamping die to be closed, the step fixing column extrudes the compression spring; the compression spring weakens the inertial impact force of the step fixing column, and the elastic plate weakens the inertial impact force of the convex column, so that the first clamping die and the second clamping die are in flexible collision contact.

Description

Technical Field

[0001] This utility model belongs to the field of cold heading mold technology, specifically relating to a high-pressure oil pipe cold heading clamping mold structure. Background Technology

[0002] A cold heading die is a type of die that utilizes the cold heading forming process. Cold heading dies are suitable for manufacturing various metal parts, such as high-pressure oil pipe fittings. For easy demolding, a cold heading die consists of two separate parts: a punching die assembly and a clamping die assembly. During the manufacturing of high-pressure oil pipe fittings, the metal blank passes through the forming cavity of the cold heading die and is cold-headed into the required shape and size of the high-pressure oil pipe fitting. The clamping die structure consists of upper and lower clamping cavities. The product forming cavity of the clamping die structure is composed of the forming cavity of the upper and lower clamping cavities and the clamping cavity for clamping the oil pipe. The design of the clamping cavity is determined based on the outer diameter of the high-pressure oil pipe to be clamped.

[0003] When using cold heading dies, the cylinder drives the upper and lower clamping dies to move and close the dies, and together with the punching die, completes the manufacturing process of forming high-pressure oil pipe joints. When the cylinder drives the upper and lower clamping dies to move, the upper and lower clamping dies will come into contact and collide when they are pressed together. During the frequent dies closing and collision process, the upper and lower clamping dies may be misaligned due to the collision force, which will cause the position of the upper and lower clamping dies to shift and result in product errors. The upper and lower clamping dies do not have a design to reduce the collision contact force, and cannot make the upper and lower clamping dies collide and contact flexibly, which is a shortcoming.

[0004] The existing cold heading mold clamping structure has the problem that there is no buffer design to make the upper and lower molds flexibly collide when they close. To address this, this application proposes a high-pressure oil pipe cold heading mold clamping structure. Utility Model Content

[0005] The purpose of this invention is to provide a high-pressure oil pipe cold heading mold structure to solve the problem mentioned in the background art that there is no buffer design on the upper and lower molds to allow for flexible collision contact.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-pressure oil pipe cold heading mold structure, comprising...

[0007] The high-pressure oil pipe cold heading clamping mold assembly includes a clamping mold base, a first clamping cylinder and a second clamping cylinder fixedly connected to the clamping mold base, a second clamping mold fixedly connected to one end of the first clamping cylinder, and a first clamping mold fixedly connected to one end of the second clamping cylinder. A slider is fixedly connected to the second clamping mold.

[0008] The fixing frame includes a top plate fixed to the clamping mold base by screws, a fixing plate perpendicular to the top plate, and a bottom plate fixed to the fixing plate by screws, the bottom plate being provided with guide rails;

[0009] The connector includes a stabilizing block connected to the top surface of the first clamping mold, a stepped fixing post of the vertical stabilizing block, and a protruding post at the center of the surface of one end of the vertical stepped fixing post.

[0010] The buffer assembly includes a buffer seat fixedly connected to a fixed plate, a limiting cylinder connected to the buffer seat by a threaded connection, a cylinder installed inside the limiting cylinder, and a compression spring sleeved on the outside of the cylinder, wherein a spring plate is welded to the inner surface of the cylinder.

[0011] Preferably, one end of the slider has a groove for the guide rail to pass through, the slider is slidably connected to the guide rail, and the distance between the slider and the fixed plate is 1 cm.

[0012] Preferably, the base plate has an "L" shaped structure, a limiting plate is welded to the side of the base plate, and a recessed limiting groove is provided on the slider. The limiting plate cooperates with the limiting groove, and the limiting plate slides in contact with the slider.

[0013] Preferably, the centers of the protruding post and the step fixing post are on the same axis, and the step fixing post includes a cylindrical rod part a and a head b, with the protruding post connected to the head b.

[0014] Preferably, one end of the limiting cylinder is provided with a threaded post, the threaded post on the limiting cylinder is embedded inside the buffer seat, and the outer surface of the limiting cylinder is tangent to the outer surface of the head b.

[0015] Preferably, the surface of the buffer seat has a concave square groove, one end of the step fixing post is inserted into the square groove, the outer diameter of the step fixing post is 2 mm larger than the outer diameter of the cylinder, and the diameter of the protruding post is 2 mm smaller than the inner diameter of the cylinder.

[0016] Preferably, the spring plates inside the cylinder are evenly distributed, the spring plates have an arc geometry, and the spring plates on the inner wall of the cylinder are in an inclined state.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] In this utility model, the clamping mold structure has a buffer design that allows the first clamping mold and the second clamping mold to flexibly collide and contact. Under the support and limiting action of the guide rail and the limiting plate, the position of the slider and the second clamping mold is stabilized. When the first clamping mold moves towards the second clamping mold and closes, the step fixing column squeezes and compresses the spring. The compression spring reduces the inertial impact force of the step fixing column, and the spring plate reduces the inertial impact force of the protrusion, so that the first clamping mold and the second clamping mold flexibly collide and contact. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2This is a top view of the first and second clamping molds of this utility model.

[0021] Figure 3 This is a side view of the fixing plate of this utility model.

[0022] Figure 4 For the present utility model Figure 3 A side view of the middle buffer seat;

[0023] Figure 5 This is a cross-sectional view of the limiting cylinder of this utility model;

[0024] Figure 6 This is a cross-sectional view of the slider of this utility model;

[0025] In the diagram: 2. Top plate; 3. Fixed plate; 4. Bottom plate; 5. Guide rail; 6. Slider; 11. Clamping base; 12. First clamping cylinder; 13. Second clamping cylinder; 14. First clamping mold; 15. Second clamping mold; 41. Limiting plate; 71. Stabilizing block; 72. Step fixing column; 81. Limiting cylinder; 82. Buffer seat; 83. Cylinder; 84. Compression spring; 721. Protruding column; 831. Spring plate. Detailed Implementation

[0026] 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.

[0027] Please see Figures 1 to 6This utility model provides a technical solution: a high-pressure oil pipe cold heading clamping mold structure, including a high-pressure oil pipe cold heading clamping mold assembly, including a clamping mold base 11, a first clamping cylinder 12 and a second clamping cylinder 13 fixedly connected to the clamping mold base 11, a second clamping mold 15 fixedly connected to one end of the first clamping cylinder 12, and a first clamping mold 14 fixedly connected to one end of the second clamping cylinder 13. Under the driving action of the first clamping cylinder 12 and the second clamping cylinder 13, the second clamping mold 15 and the first clamping mold 14 are in a clamping state. A slider 6 is fixedly connected to the second clamping mold 15. The first clamping mold 15 is fixed to the slider 6 by screws. The slider 6 is limited by the guide rail 5 to prevent the slider 6 from deflecting, thereby preventing the second clamping mold 15 from deflecting. The fixing frame includes a top plate 2 fixed to the clamping mold base 11 by screws, a fixing plate 3 vertically attached to the top plate 2, and a bottom plate 4 fixed to the fixing plate 3 by screws. The bottom plate 4 is provided with a guide rail 5, which guides and limits the slider 6. The top plate 2 fixes the fixing plate 3, and the fixing plate 3 fixes the bottom plate 4. The connecting parts include a stabilizing block 71 connected to the top surface of the first clamping mold 14, a stepped fixing post 72 of the vertical stabilizing block 71, and a vertical stepped fixing post. The protrusion 721 at the center of one end surface of the first clamping mold 14 moves towards the second clamping mold 15. The stabilizing block 71, the step fixing post 72, and the protrusion 721 move in the same direction, inserting into the interior of the buffer seat 82. The compression spring 84 buffers the impact force of the step fixing post 72, allowing the first clamping mold 14 and the second clamping mold 15 to flexibly contact and collide. The buffer assembly includes a buffer seat 82 fixedly connected to the fixing plate 3, a limiting cylinder 81 threadedly connected to the buffer seat 82, a cylinder 83 installed inside the limiting cylinder 81, and a sleeved on the cylinder 82. The outer compression spring 84 and the limiting cylinder 81 limit the step fixing post 72 to prevent the step fixing post 72 from tilting. The buffer seat 82 supports the cylinder 83 and the compression spring 84. The step fixing post 72 is inserted into the buffer seat 82. The step fixing post 72 compresses the compression spring 84. The compression spring 84 reduces the impact force of the step fixing post 72. A spring plate 831 is welded on the inner surface of the cylinder 83. The protrusion 721 is inserted into the cylinder 83. The protrusion 721 abuts against the spring plate 831, which can cause the spring plate 831 to deform. The spring plate 831 reduces the impact force brought by the protrusion 721.

[0028] In this embodiment, a groove is provided on one end of the slider 6 for the guide rail 5 to pass through. The slider 6 is slidably connected to the guide rail 5. The guide rail 5 plays the role of guiding and limiting the slider 6 to prevent the slider 6 from deflecting. The distance between the slider 6 and the fixed plate 3 is 1 cm. The distance between the slider 6 and the fixed plate 3 does not affect the movement of the slider 6 with the second clamping mold 15.

[0029] In this embodiment, the base plate 4 has an "L" shaped structure. A limiting plate 41 is welded to the side of the base plate 4. A recessed limiting groove is provided on the slider 6. The limiting plate 41 cooperates with the limiting groove. The limiting plate 41 slides in contact with the slider 6. The limiting plate 41 supports and limits the slider 6 to prevent the slider 6 from deflecting and to ensure the stability of the position of the second clamping mold 15.

[0030] In this embodiment, the centers of the protruding post 721 and the stepped fixing post 72 are on the same axis. The stepped fixing post 72 includes a cylindrical rod portion a and a head portion b. The protruding post 721 is connected to the head portion b. One end of the limiting cylinder 81 is provided with a threaded post. The threaded post on the limiting cylinder 81 is embedded in the interior of the buffer seat 82. The connection method between the limiting cylinder 81 and the buffer seat 82 is simple and easy to disassemble and assemble. The outer surface of the limiting cylinder 81 is tangent to the outer surface of the head portion b. The limiting cylinder 81 limits the stepped fixing post 72, preventing the stepped fixing post 72 from deflecting, thereby preventing the first clamping mold 14 from deflecting.

[0031] In this embodiment, the surface of the buffer seat 82 is provided with a concave square groove, one end of the step fixing post 72 is inserted into the square groove, the outer diameter of the step fixing post 72 is 2 mm larger than the outer diameter of the cylinder 83, and the diameter of the protrusion post 721 is 2 mm smaller than the inner diameter of the cylinder 83. The step fixing post 72 can be inserted into the interior of the buffer seat 82, and the protrusion post 721 can be inserted into the interior of the cylinder 83.

[0032] In this embodiment, the spring plates 831 inside the cylinder 83 are evenly distributed and have an arc geometry. The spring plates 831 on the inner wall of the cylinder 83 are in an inclined state. The protruding post 721 abuts against the spring plate 831, which can cause the spring plate 831 to deform and reduce the impact force brought by the protruding post 721.

[0033] Working principle and usage process of this utility model:

[0034] Under the driving action of the first clamping cylinder 12 and the second clamping cylinder 13, the second clamping mold 15 and the first clamping mold 14 are in a clamping state.

[0035] When the first clamping cylinder 12 drives the second clamping mold 15 to move, the slider 6 is limited by the guide rail 5, and the limiting plate 41 supports and limits the slider 6 to prevent the slider 6 from deflecting and to ensure the stability of the position of the second clamping mold 15.

[0036] When the second clamping cylinder 13 drives the first clamping mold 14 to move, the stabilizing block 71 and the step fixing post 72 on the first clamping mold 14 move toward the buffer seat 82.

[0037] When the step fixing post 72 moves into the buffer seat 82, the limiting cylinder 81 limits the step fixing post 72 to prevent the step fixing post 72 from tilting. The step fixing post 72 squeezes the compression spring 84, and the compression spring 84 reduces the impact force of the step fixing post 72.

[0038] The protrusion 721 can be inserted into the inside of the cylinder 83. The protrusion 721 abuts against the spring plate 831, which can cause the spring plate 831 to deform and reduce the impact force brought by the protrusion 721.

[0039] In summary, the clamping structure of this application has a buffer design that allows the first clamping mold 14 and the second clamping mold 15 to make flexible collision contact. Under the support and limiting effect of the guide rail 5 and the limiting plate 41, the positions of the slider 6 and the second clamping mold 15 are stabilized. When the first clamping mold 14 moves towards the second clamping mold 15 to close the mold, the step fixing post 72 squeezes the compression spring 84. The compression spring 84 reduces the inertial impact force of the step fixing post 72, and the spring plate 831 reduces the inertial impact force brought by the protrusion 721, so that the first clamping mold 14 and the second clamping mold 15 make flexible collision contact.

[0040] Although embodiments of the present invention have been shown and described (see the detailed description above), it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cold heading mold structure for high-pressure oil pipes, characterized in that: include The high-pressure oil pipe cold heading clamping mold assembly includes a clamping mold base (11), a first clamping cylinder (12) and a second clamping cylinder (13) fixedly connected to the clamping mold base (11), a second clamping mold (15) fixedly connected to one end of the first clamping cylinder (12), and a first clamping mold (14) fixedly connected to one end of the second clamping cylinder (13). A slider (6) is fixedly connected to the second clamping mold (15). The fixing frame includes a top plate (2) fixed to the clamping mold base (11) by screws, a fixing plate (3) perpendicular to the top plate (2), and a bottom plate (4) fixed to the fixing plate (3) by screws, the bottom plate (4) being provided with a guide rail (5). The connector includes a stabilizing block (71) connected to the top surface of the first clamping mold (14), a step fixing post (72) of the vertical stabilizing block (71), and a protruding post (721) at the center of one end surface of the vertical step fixing post (72). The buffer assembly includes a buffer seat (82) fixedly connected to the fixed plate (3), a limiting cylinder (81) connected to the buffer seat (82) by a threaded connection, a cylinder (83) installed inside the limiting cylinder (81), and a compression spring (84) sleeved on the outside of the cylinder (83). A spring plate (831) is welded to the inner surface of the cylinder (83).

2. The high-pressure oil pipe cold heading clamping mold structure according to claim 1, characterized in that: The slider (6) has a groove on one end for the guide rail (5) to pass through. The slider (6) is slidably connected to the guide rail (5). The distance between the slider (6) and the fixing plate (3) is 1 cm.

3. The high-pressure oil pipe cold heading clamping mold structure according to claim 1, characterized in that: The base plate (4) has an "L" shaped structure. A limiting plate (41) is welded to the side of the base plate (4). A recessed limiting groove is provided on the slider (6). The limiting plate (41) cooperates with the limiting groove and slides in contact with the slider (6).

4. The high-pressure oil pipe cold heading mold structure according to claim 1, characterized in that: The center of the protruding post (721) and the step fixing post (72) are on the same axis. The step fixing post (72) includes a cylindrical rod part a and a head part b. The protruding post (721) is connected to the head part b.

5. The high-pressure oil pipe cold heading clamping mold structure according to claim 4, characterized in that: One end of the limiting cylinder (81) is provided with a threaded post, the threaded post on the limiting cylinder (81) is embedded in the interior of the buffer seat (82), and the outer surface of the limiting cylinder (81) is tangent to the outer surface of the head b.

6. The high-pressure oil pipe cold heading clamping mold structure according to claim 1, characterized in that: The surface of the buffer seat (82) is provided with a concave square groove. One end of the step fixing post (72) is inserted into the square groove. The outer diameter of the step fixing post (72) is 2 mm larger than the outer diameter of the cylinder (83). The diameter of the protruding post (721) is 2 mm smaller than the inner diameter of the cylinder (83).

7. The high-pressure oil pipe cold heading mold structure according to claim 1, characterized in that: The spring plates (831) inside the cylinder (83) are evenly distributed. The spring plates (831) have a circular arc geometry. The spring plates (831) on the inner wall of the cylinder (83) are in an inclined state.

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