Clamping tool for cold-drawing machining of stainless steel pipe

Abstract

The utility model discloses a clamping tool for cold drawing of a stainless steel pipe, which belongs to the technical field of clamping tools and comprises an outer clamping frame and an inner clamping frame, outer clamps capable of being adjusted up and down are arranged at the upper end and the lower end of the outer clamping frame, the outer clamps are used for clamping the outer wall of a pipe fitting, the inner clamping frame is mounted in the outer clamping frame, and inner clamps are mounted on the inner clamping frame and used for clamping the outer wall of the pipe fitting. The inner clamp is used for abutting against the inner wall of the pipe fitting and comprises a fixed clamping plate fixedly arranged on the inner clamping frame and a movable clamping plate connected with the inner clamping frame in a sliding mode. The technical key points are as follows: the outer clamp can apply pressure to the outer wall of the pipe fitting, and the inner clamp can apply external thrust to the inner wall of the pipe fitting, so that the adjacent outer clamp and inner clamp can be matched with each other to firmly clamp the pipe wall, and the clamping mode hardly causes deformation of the clamped part of the pipe fitting; and meanwhile, the contact area between the clamping tool and the pipe fitting can be greatly increased, the friction effect is strengthened, and the pipe end is not prone to slipping in the drawing process.

Description

Technical Field

[0001] The utility model relates to the technical field of clamping tooling, in particular to a clamping tooling for cold drawing of stainless steel pipes. Background Art

[0002] Cold drawing of stainless steel tubes is a key production process used to manufacture precision seamless tubes with high dimensional accuracy and excellent surface finish. Due to its high precision and surface finish, cold-drawn stainless steel tubes are widely used in mechanical structures, hydraulic equipment, petrochemical equipment, food processing, aerospace, and other fields. In these applications, cold-drawn stainless steel tubes can significantly improve product quality and performance while saving machining time and material costs.

[0003] The utility model with announcement number CN202070585U discloses a cold-drawn steel pipe cold-drawn head clamp, including a left clamping plate and a right clamping plate, the left clamping plate having a left clamping groove, and the right clamping plate having a right clamping groove. The utility model has the characteristics that when clamped in use, the cold-drawn steel pipe cold-drawn head is not easily deformed and the processing liquid can flow out of the cold-drawn steel pipe smoothly.

[0004] When cold drawing a steel pipe, it is necessary to apply a sufficiently large pulling force to the steel pipe, which requires ensuring that a sufficiently large friction force can be generated between the clamping tool and the steel pipe, that is, the clamping tool needs to apply a sufficiently large clamping force. Although the above-mentioned utility model can avoid the clamping end of the pipe being squeezed and severely deformed to a certain extent compared with the flat clamp, due to the lack of support measures inside the pipe end, when a large clamping force is applied, the pipe end is still likely to be squeezed and deformed, and the friction effect will be greatly reduced during the deformation, which makes it easy for the pipe end to slip. Therefore, in response to the above problem, a clamping tool for cold drawing of stainless steel pipes is proposed. Utility Model Content

[0005] The technical problem to be solved by the present invention is to provide a clamping tool for cold drawing of stainless steel pipes, which can apply pressure to the outer wall of the pipe through the outer clamp on the outer clamping frame, and apply an external thrust to the inner wall of the pipe through the inner clamp on the inner clamp, so that the adjacent outer clamps can cooperate with the inner clamp to firmly clamp the pipe wall. This clamping method will hardly cause the clamping part of the pipe to deform, and at the same time can greatly increase the contact area between the clamping tool and the pipe, thereby strengthening the friction effect, making it difficult for the pipe end to slip during the drawing process, and solving the technical problems in the prior art.

[0006] The technical solution adopted by the embodiment of the present application to solve the technical problem is:

[0007] A clamping tool for cold drawing of stainless steel pipes, comprising an outer clamping frame, wherein both upper and lower ends of the outer clamping frame are provided with outer clamps that can be adjusted up and down, the outer clamp being used to clamp the outer wall of the pipe fitting, and an inner clamping frame being installed in the outer clamping frame, the inner clamp being installed on the inner clamping frame, and being used to support the inner wall of the pipe fitting, wherein the inner clamp comprises a fixed clamping plate fixedly arranged on the inner clamping frame, and a movable clamping plate slidably connected to the inner clamping frame, wherein the outer clamp can apply pressure to the outer wall of the pipe fitting, and the inner clamp can apply an external thrust to the inner wall of the pipe fitting, so that adjacent outer clamps can cooperate with the inner clamp to firmly clamp the pipe wall, and this clamping method will hardly cause deformation of the clamping part of the pipe fitting, and at the same time can greatly increase the contact area between the clamping tooling and the pipe fitting, strengthen the friction effect, and make the pipe end not easy to slip off during the drawing process.

[0008] In one possible implementation, the inner clamping frame includes a front mounting plate, and the back cover is provided with a rear cover. At the same time, a through slide groove is opened on the front mounting plate, and a guide bar is provided on the back of the front mounting plate adjacent to the slide groove. The above structural form provides the necessary structural basis for the installation of the fixed splint and the movable splint.

[0009] In one possible implementation, the end of the movable splint is fixedly connected to a sliding connection block, which is slidably set in the sliding groove and the guide bar. The setting of the sliding connection block can realize the sliding connection between the movable splint and the front mounting plate, providing the necessary structural basis for adjusting the distance between the movable splint and the fixed splint.

[0010] In one possible implementation, a threaded cylinder is provided on the top of the rear cover, in which a threaded internal threaded rod is passed through, the bottom end of the internal threaded rod is rotatably connected to the sliding connection block, and the top end of the internal threaded rod is fixedly connected to an internal adjusting wheel. When the position of the movable splint needs to be adjusted, the internal threaded rod is turned, and the sliding connection block will slide up and down under the action of the thread engagement, thereby adjusting the position of the movable splint, thereby changing the distance between the movable splint and the fixed splint, so as to play the role of tightening and pushing outward the inner wall of the pipe fittings of different diameters.

[0011] In one possible implementation, the external clamp includes an externally threaded rod threadedly connected to an external clamping frame, the bottom end of the externally threaded rod is rotatably connected to an external clamping plate, and the top end of the externally threaded rod is fixedly connected to an external adjusting wheel. When the externally threaded rod is screwed by the external adjusting wheel, the externally threaded rod will move up and down and synchronously drive the external clamping plate to move, thereby adjusting the position so that the external clamping plate can clamp the outer wall of the pipe fitting.

[0012] In one possible implementation, a plurality of symmetrically arranged guide rods are fixedly provided on the outer clamping plate, and the guide rods pass through the outer clamping frame and are in sliding contact with it. The setting of the guide rods can ensure that the outer clamping plate will not rotate during the up and down movement, making it easy to use.

[0013] In one possible implementation, the outer clamping frame includes a U-shaped frame, which is provided with an installation cavity that matches the size of the inner clamping frame. The front and rear ends of the U-shaped frame are respectively fixed with a front baffle and a rear cover. The above-mentioned structural form enables the inner clamping frame to be embedded in the outer clamping frame and cannot shake, ensuring that the outer clamp and the inner clamp can cooperate to complete the clamping.

[0014] In one possible implementation, a guide groove is provided on the rear cover, a guide protrusion is fixedly provided on the sliding connection block, and the guide protrusion is slidably provided in the guide groove. The guide protrusion can slide in the guide groove to ensure the stability of the sliding connection block during the sliding process, thereby enabling the movable splint to smoothly adjust its position and ensure the clamping effect.

[0015] In summary, the present invention has the following beneficial technical effects:

[0016] The clamping fixture can apply pressure to the outer wall of the pipe through the outer clamp on the outer clamping frame, and apply an outward thrust to the inner wall of the pipe through the inner clamp on the inner clamp, so that the adjacent outer clamps can cooperate with the inner clamps to firmly clamp the pipe wall. This clamping method will hardly cause deformation of the clamped part of the pipe.

[0017] In addition, traditional external clamping measures only involve friction between the clamping tool and the outer wall of the pipe fitting, while this clamping method allows the clamping tool to have equal friction with the inner and outer walls of the pipe fitting, which can greatly increase the contact area between the clamping tool and the pipe fitting, thereby strengthening the friction and making it less likely for the pipe end to slip during the pulling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the utility model;

[0021] Figure 3 It is a schematic diagram of the local structure of the utility model;

[0022] Figure 4 This is a schematic structural diagram of the outer clamping frame of the present utility model.

[0023] In the figure: 1. External clamping frame; 11. U-shaped frame; 12. Mounting cavity; 13. Front baffle; 14. Rear cover; 2. External clamp; 21. External threaded rod; 22. External clamping plate; 23. External adjusting wheel; 24. Guide rod; 3. Internal clamping frame; 31. Front mounting plate; 32. Rear cover; 33. Guide strip; 34. Threaded barrel; 35. Guide groove; 4. Internal clamp; 41. Fixed clamping plate; 42. Movable clamping plate; 43. Sliding connecting block; 44. Internal threaded rod; 45. Internal adjusting wheel; 46. Guide protrusion. DETAILED DESCRIPTION

[0024] The technical solution in the embodiments of the present application is to solve the problems of the above-mentioned background technology, and the overall idea is as follows:

[0025] like Figure 1 - Figure 2 As shown, the present embodiment provides a clamping tool for cold drawing of stainless steel pipes, comprising an outer clamping frame 1, with outer clamps 2 adjustable up and down at both ends thereof, the outer clamp 2 being used to clamp the outer wall of the pipe fitting, and an inner clamping frame 3 being installed inside the outer clamping frame 1, and an inner clamp 4 being installed on the inner clamping frame 3, for supporting the inner wall of the pipe fitting, wherein the inner clamp 4 comprises a fixed clamping plate 41 fixedly arranged on the inner clamping frame 3, and a movable clamping plate 42 slidably connected to the inner clamping frame 3, which can apply pressure to the outer wall of the pipe fitting by the outer clamp 2 and apply an external thrust to the inner wall of the pipe fitting by the inner clamp 4, so that the adjacent outer clamps 2 can cooperate with the inner clamp 4 to firmly clamp the pipe wall, and this clamping method will hardly cause deformation of the clamping part of the pipe fitting, and at the same time can greatly increase the contact area between the clamping tool and the pipe fitting, strengthen the friction, and make the pipe end not easy to slip off during the drawing process.

[0026] like Figure 2 - Figure 3 As shown, the inner clamping frame 3 includes a front mounting plate 31, and the back cover is provided with a rear cover 32. At the same time, a through slide groove is opened on the front mounting plate 31, and a guide bar 33 is provided on the back of the front mounting plate 31 adjacent to the slide groove. The end of the movable splint 42 is fixedly connected with a sliding connection block 43, and the sliding connection block 43 is slidably set in the slide groove and the guide bar 33. The setting of the sliding connection block 43 can realize the sliding connection between the movable splint 42 and the front mounting plate 31, providing the necessary structural basis for adjusting the distance between the movable splint 42 and the fixed splint 41.

[0027] Among them, a threaded barrel 34 is provided on the top of the rear cover 32, in which an internally threaded rod 44 with a threaded connection is passed through. The bottom end of the internally threaded rod 44 is rotatably connected to the sliding connection block 43, and the top end of the internally threaded rod 44 is fixedly connected to an internal adjusting wheel 45. When it is necessary to adjust the position of the movable splint 42, the internally threaded rod 44 is screwed, and under the action of the threaded engagement, it will drive the sliding connection block 43 to slide up and down, thereby realizing the adjustment of the position of the movable splint 42, thereby changing the distance between the movable splint 42 and the fixed splint 41, so as to play the role of tightening and pushing outward on the inner wall of pipes of different diameters.

[0028] like Figure 2 、 Figure 4 As shown, the outer clamp 2 includes an externally threaded rod 21 threadedly connected to the external clamping frame 1, and the bottom end of the externally threaded rod 21 is rotatably connected to an outer clamping plate 22, and the top end of the externally threaded rod 21 is fixedly connected to an outer adjusting wheel 23. When the externally threaded rod 21 is screwed by the external adjusting wheel 23, the externally threaded rod 21 will move up and down and synchronously drive the outer clamping plate 22 to move, so as to adjust the position so that the outer clamping plate 22 can clamp the outer wall of the pipe fitting, wherein a plurality of symmetrically arranged guide rods 24 are fixedly provided on the outer clamping frame 1, and the guide rods 24 pass through the external clamping frame 1 and are in sliding contact with it. The setting of the guide rods 24 can ensure that the outer clamping plate 22 will not rotate during the up and down movement, so that it can be easy to use.

[0029] In addition, the outer clamping frame 1 includes a U-shaped frame 11, which is provided with a mounting cavity 12 that matches the size of the inner clamping frame 3. The front and rear ends of the U-shaped frame 11 are respectively fixed with a front baffle 13 and a rear cover 14. The above-mentioned structural form enables the inner clamping frame 3 to be embedded in the outer clamping frame 1 and cannot shake, ensuring that the outer clamp 2 and the inner clamp 4 can cooperate to complete the clamping.

[0030] like Figure 3 As shown, a guide groove 35 is provided on the rear cover 32, and a guide protrusion 46 is fixedly provided on the sliding connection block 43, and the guide protrusion 46 is slidably set in the guide groove 35. The guide protrusion 46 can slide in the guide groove 35 to ensure the stability of the sliding connection block 43 during the sliding process, thereby realizing that the movable splint 42 can be smoothly adjusted to ensure the clamping effect.

[0031] The use principle and use process of this utility model:

[0032] The clamping tool can apply pressure to the outer wall of the pipe fitting through the outer clamp 2 on the outer clamping frame 1, and apply an external thrust to the inner wall of the pipe fitting through the inner clamp 4 on the inner clamping frame 3, so that the adjacent outer clamps 2 can cooperate with the inner clamps 4 to firmly clamp the pipe wall. This clamping method will hardly cause deformation of the clamping part of the pipe fitting.

[0033] The specific operation is to twist the internal threaded rod 44, which will drive the sliding connection block 43 to slide up and down under the action of the thread engagement, thereby adjusting the position of the movable splint 42, thereby changing the distance between the movable splint 42 and the fixed splint 41, so as to play the role of tightening and pushing outward on the inner walls of pipes of different diameters. Subsequently, when the external threaded rod 21 is twisted by the external adjusting wheel 23, the external threaded rod 21 will move up and down and synchronously drive the outer splint 22 to move, thereby adjusting the position so that the outer splint 22 can clamp the outer wall of the pipe, thereby completing the clamping scheme of outer clamping and inner pushing.

[0034] In addition, traditional external clamping measures only involve friction between the clamping tool and the outer wall of the pipe fitting, while this clamping method allows the clamping tool to have equal friction with the inner and outer walls of the pipe fitting, which can greatly increase the contact area between the clamping tool and the pipe fitting, thereby strengthening the friction and making it less likely for the pipe end to slip during the pulling process.

[0035] Finally, it should be noted that the above embodiments are merely examples for the purpose of illustrating the present invention and are not intended to limit the embodiments. Those skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. It is not necessary and impossible to provide an exhaustive list of all possible embodiments. However, any obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A clamping tool for cold drawing of stainless steel pipes, characterized in that: include: An outer clamping frame (1) is provided with outer clamps (2) that can be adjusted up and down at both upper and lower ends, and the outer clamps (2) are used to clamp the outer wall of the pipe; An inner clamping frame (3) is mounted inside the outer clamping frame (1), and an inner clamp (4) is mounted on the inner clamping frame (3) for supporting the inner wall of the pipe; The inner clamp (4) comprises a fixed clamping plate (41) fixedly arranged on the inner clamping frame (3), and a movable clamping plate (42) slidably connected to the inner clamping frame (3).

2. The clamping tool for cold drawing of stainless steel pipe according to claim 1, characterized in that: The inner clamping frame (3) includes a front mounting plate (31), and a rear cover (32) is provided on the back side. A through slide groove is provided on the front mounting plate (31), and a guide bar (33) is provided on the back side of the front mounting plate (31) adjacent to the slide groove.

3. The clamping tool for cold drawing of stainless steel pipe according to claim 2, characterized in that: The end of the movable splint (42) is fixedly connected with a sliding connection block (43), and the sliding connection block (43) is slidably arranged in the sliding groove and the guide bar (33).

4. The clamping tool for cold drawing of stainless steel pipe according to claim 3, characterized in that: The top of the rear cover (32) is provided with a threaded barrel (34), through which a threaded internal threaded rod (44) is passed. The bottom end of the internal threaded rod (44) is rotatably connected to a sliding connection block (43), and the top end of the internal threaded rod (44) is fixedly connected to an internal adjustment wheel (45).

5. The clamping tool for cold drawing of stainless steel pipe according to claim 1, characterized in that: The outer clamp (2) comprises an outer threaded rod (21) threadedly connected to the outer clamping frame (1), the bottom end of the outer threaded rod (21) is rotatably connected to an outer clamping plate (22), and the top end of the outer threaded rod (21) is fixedly connected to an outer adjusting wheel (23).

6. The clamping tool for cold drawing of stainless steel pipe according to claim 5, characterized in that: A plurality of symmetrically arranged guide rods (24) are fixedly provided on the outer clamping plate (22), and the guide rods (24) pass through the outer clamping frame (1) and are in sliding contact with the outer clamping frame (1).

7. The clamping tool for cold drawing of stainless steel pipe according to claim 1, characterized in that: The outer clamping frame (1) comprises a U-shaped frame (11) in which a mounting cavity (12) having a size matching that of the inner clamping frame (3) is provided. A front baffle (13) and a rear cover (14) are fixedly provided at the front and rear ends of the U-shaped frame (11), respectively.

8. The clamping tool for cold drawing of stainless steel pipe according to claim 3, characterized in that: A guide groove (35) is provided on the rear cover (32), a guide protrusion (46) is fixedly provided on the sliding connection block (43), and the guide protrusion (46) is slidably provided in the guide groove (35).

Images