Stretching device

Abstract

The utility model provides a stretching device, which relates to the technical field of stainless steel tube stretching, and comprises a stretching assembly, an outer side positioning assembly is fixedly connected inside the stretching assembly, an inner side positioning assembly is fixedly connected on one side of the stretching assembly, the inner side positioning assembly comprises a placing column, and one end of the placing column is fixedly connected with an extension column. A sliding column is arranged in the extension column, a spring sleeves the outer side of the sliding column, and the end, away from the extension column, of the spring is fixedly connected to the inner side positioning block, so that through the bidirectional clamping design of the inner positioning block and the outer positioning block, stable clamping of the inner surface and the outer surface of the stainless steel pipe is ensured, and sliding or deformation of the stainless steel pipe caused by uneven stress is avoided; the positioning blocks on the inner side and the outer side can be automatically adjusted according to the thickness of the stainless steel pipe, so that the device is suitable for pipes of different sizes, the flexibility and the practicability of the device are improved, and compared with part of the prior art, it is ensured that sufficient clamping force is applied to the thin-wall stainless steel pipe, and meanwhile pipe wall deformation or damage cannot be caused.

Description

Technical Field

[0001] The utility model relates to the technical field of stainless steel pipe stretching, in particular to a stretching device. Background Art

[0002] Stainless steel pipes have excellent corrosion resistance, high strength, high and low temperature resistance, good workability and beautiful appearance. They are usually made of alloying elements such as nickel and chromium, which can remain stable in a variety of environments.

[0003] However, in actual use, the following shortcomings still exist, for example: the existing external clamping and stretching device may experience unstable clamping or slipping during the clamping process, especially when stretching thin-walled stainless steel pipes. Due to the thin pipe wall, a large clamping force needs to be applied during clamping to prevent the sample from sliding. However, excessive clamping force can easily cause deformation or local damage to the pipe wall, thereby affecting the accuracy of the tensile test data.

[0004] Therefore, the utility model provides a stretching device. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings of the prior art and provide a stretching device.

[0006] In order to achieve the above object, the utility model adopts the following technical solution: a stretching device, comprising a stretching assembly, the interior of the stretching assembly is fixedly connected to an outer positioning assembly, and one side of the stretching assembly is fixedly connected to an inner positioning assembly;

[0007] The inner positioning assembly includes a placement column, one end of which is fixedly connected to an extension column, a sliding column is provided inside the extension column, a spring is provided on the outer side of the sliding column, and the end of the spring away from the extension column is fixedly connected to the inner positioning block.

[0008] As a preferred embodiment, the outer positioning assembly includes a cylinder, the driving end of the cylinder is fixedly connected to a conical column, the outer side of the conical column is fixedly connected to a push plate, and one end of the placement column is slidably connected to an outer positioning block.

[0009] The technical effect of adopting the above technical solution is: by controlling the internal and external clamping forces, the stainless steel pipe is ensured to remain stable during the stretching process, thereby improving the accuracy of the tensile test data.

[0010] As a preferred embodiment, the stretching assembly includes a stretching assembly and a stainless steel pipe, the stretching assembly is installed with a hydraulic cylinder, one end of the hydraulic cylinder is fixedly connected to a mounting plate, the outer side of the stainless steel pipe is engaged with the outer positioning block, and the inner side of the stainless steel pipe is engaged with the inner positioning block.

[0011] The technical effect of adopting the above technical solution is that the stretching assembly can achieve precise stretching of the stainless steel pipe, ensuring its dimensional accuracy and surface quality.

[0012] As a preferred embodiment, one end of the spring is fixedly connected to the extension column, and the other end of the spring is fixedly connected to the sliding column.

[0013] The technical effect of adopting the above technical solution is that the inner positioning block can automatically cancel the pressure on the stainless steel pipe.

[0014] As a preferred embodiment, the outer side of the tapered column is slidably connected to the sliding column.

[0015] The technical effect of adopting the above technical solution is to ensure that the power of the cylinder can be transmitted to the inner positioning block and the outer positioning block.

[0016] As a preferred embodiment, one end of the push plate is slidably connected to the outer positioning block.

[0017] The technical effect of adopting the above technical solution is to ensure that the push block can maintain linear stability when sliding.

[0018] As a preferred embodiment, one end of the placement column away from the extension column is fixedly connected to the mounting plate.

[0019] The technical effect of adopting the above technical solution is to ensure that sufficient support can be maintained during the clamping process.

[0020] Compared with the prior art, the advantages and positive effects of the present invention are:

[0021] When the cylinder is started, the conical column moves toward the top end, and the pushing plate moves upward accordingly. Since the pushing plate has a trapezoidal design, the outer positioning block slides along the placing column until the outer positioning block contacts the outer side of the stainless steel tube. At the same time, the conical column also pushes the sliding column during movement, and the sliding column drives the inner positioning block to engage with the inner side of the stainless steel tube. Then, when the conical column no longer applies pressure, the sliding column returns to its original position under the action of the spring. This design ensures stable clamping of the inner and outer surfaces of the stainless steel tube through the two-way clamping design of the inner and outer positioning blocks, avoiding sliding or deformation of the stainless steel tube caused by uneven force. In addition, since the inner and outer positioning blocks can be automatically adjusted according to the thickness of the stainless steel tube, it is suitable for pipes of different sizes, which increases the flexibility and practicality of the device. Compared with some existing technologies, it ensures that sufficient clamping force is applied to thin-walled stainless steel tubes without causing deformation or damage to the tube wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A three-dimensional diagram of a stretching device provided by the utility model;

[0023] Figure 2 This is a schematic structural diagram of an outer positioning component of a stretching device provided by the utility model;

[0024] Figure 3 This is a schematic structural diagram of an inner positioning component of a stretching device provided by the utility model;

[0025] Figure 4 This is a schematic diagram of the placement column structure of a stretching device provided by the utility model.

[0026] Legend:

[0027] 1. Tensile assembly; 12. Hydraulic cylinder; 13. Mounting plate; 14. Stainless steel pipe;

[0028] 2. Outer positioning assembly; 21. Cylinder; 22. Conical column; 23. Push plate; 24. Outer positioning block;

[0029] 3. Inner positioning assembly; 31. Placement column; 32. Extension column; 33. Sliding column; 34. Spring; 35. Inner positioning block. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] like Figure 1 - Figure 4 As shown, this embodiment provides a technical solution: a stretching device, including a stretching assembly 1, an outer positioning assembly 2 is fixedly connected to the interior of the stretching assembly 1, and an inner positioning assembly 3 is fixedly connected to one side of the stretching assembly 1. The stretching assembly 1 is mainly used to apply a stretching force to a stainless steel tube 14. The outer positioning assembly 2 is fixed to the outside of the stretching assembly 1 and is used to provide an outer clamping force to ensure that the sample remains stable during the stretching process. The inner positioning assembly 3 is fixedly connected to the inner side of the stretching assembly 1 and is used to position and clamp the inner side of the stainless steel tube 14 to prevent the sample from deflecting or deforming during the stretching process.

[0032] The inner positioning assembly 3 includes a placing column 31, one end of the placing column 31 is fixedly connected to the extension column 32, and a sliding column 33 is arranged inside the extension column 32. The outer side of the sliding column 33 is sleeved with a spring, one end of the spring 34 is fixedly connected to the extension column 32, and the other end of the spring 34 is fixedly connected to the sliding column 33. The end of the spring 34 away from the extension column 32 is fixedly connected to the inner positioning block 35. The placing column 31 is used to support and fix the entire inner positioning assembly 3 to ensure that it remains stable during the stretching process. The extension column 32 plays the role of extending support. The sliding column 33 is installed inside the extension column 32 and can slide axially along the extension column 32 to adjust the clamping force. The function of the spring 34 is to provide elastic clamping force to ensure that the sliding column 33 can be adjusted according to the thickness and shape of the pipe wall. The inner positioning block 35 plays the role of inner clamping and positioning.

[0033] Furthermore, if Figure 1 - Figure 4 As shown: the outer positioning assembly 2 includes a cylinder 21, the driving end of the cylinder 21 is fixedly connected to the tapered column 22, the outer side of the tapered column 22 is slidably connected to the sliding column 33, the outer side of the tapered column 22 is fixedly connected to the push plate 23, one end of the placement column 31 is slidably connected to the outer positioning block 24, and one end of the push plate 23 is slidably connected to the outer positioning block 24. The cylinder 21 serves as the main power source, and the cylinder 21 drives the movement of the outer positioning assembly 2 to provide precise and controllable clamping force. The design of the tapered column 22 adopts a tapered structure, so that the push plate 23 can follow the movement of the tapered column 22 for adaptive adjustment during the clamping process. The function of the push plate 23 is to evenly transfer the force to the outer positioning block 24 through the drive of the cylinder 21. The design of the push plate 23 ensures that the clamping force can be accurately and stably applied to the outside of the stainless steel pipe 14 to avoid sliding.

[0034] Furthermore, if Figure 1 - Figure 2As shown: In this scheme, the stretching assembly 1 includes a stretching assembly 1 and a stainless steel pipe 14. The stretching assembly 1 is installed with a hydraulic cylinder 12, one end of the hydraulic cylinder 12 is fixedly connected to a mounting plate 13, and the end of the placement column 31 away from the extension column 32 is fixedly connected to the mounting plate 13. The outer side of the stainless steel pipe 14 is engaged with the outer positioning block 24, and the inner side of the stainless steel pipe 14 is engaged with the inner positioning block 35. The hydraulic cylinder 12 is the main driving device of the stretching assembly 1, providing stretching force to ensure that the stretching force can be evenly and controllably applied to the stainless steel pipe 14. The mounting plate 13 plays a fixing and supporting role, and at the same time connects the hydraulic cylinder 12 to the placement column 31 to make the entire structure more stable. The outer positioning block 24 and the inner positioning block 35 simultaneously contact the stainless steel pipe 14, which plays a role of fixing and supporting the stainless steel pipe 14, so that the stainless steel pipe 14 can maintain a stable position under the action of the tensile force, thereby avoiding the sample from being offset or deformed due to uneven force during the stretching process.

[0035] Working principle:

[0036] like Figure 1 - Figure 4 As shown:

[0037] During use: First, the operator places the stainless steel tube 14 to be tested between the inner positioning block 35 and the outer positioning block 24 of the tensile assembly 1, and then starts the cylinder 21. As the cylinder 21 moves, the conical column 22 moves toward the top, first driving the push plate 23 to move toward the top. Due to the trapezoidal design of the push plate 23, the outer positioning block 24 slides on the placement column 31 until it contacts the outer side of the stainless steel tube 14. At the same time, when the conical column 22 moves, the conical column 22 contacts the sliding column 33. The sliding column 33 is driven by the conical column 22. It moves outward until the inner positioning block 35 is engaged with the inside of the stainless steel tube 14, and when the tapered column 22 stops applying pressure to the sliding column 33, it can return to its original position under the action of the spring 34 to adapt to stainless steel tubes 14 of different thicknesses and shapes, ensuring that the clamping force is uniform and stable. When the stainless steel tube 14 reaches a predetermined stretching amount or breaks, the hydraulic cylinder 12 stops working and the air cylinder 21 also stops driving, and the entire stretching device enters a standby state. At this time, the operator can remove the stretched stainless steel tube 14 and carry out subsequent measurement and analysis.

[0038] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any other form. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A stretching device comprising a stretching assembly (1), characterized in that: The interior of the stretching assembly (1) is fixedly connected to an outer positioning assembly (2), and one side of the stretching assembly (1) is fixedly connected to an inner positioning assembly (3); The inner positioning assembly (3) comprises a placement column (31), one end of which is fixedly connected to an extension column (32), a sliding column (33) is provided inside the extension column (32), a spring (34) is sleeved on the outer side of the sliding column (33), and one end of the spring (34) away from the extension column (32) is fixedly connected to the inner positioning block (35).

2. A stretching device according to claim 1, characterized in that: The outer positioning assembly (2) comprises a cylinder (21), a driving end of the cylinder (21) is fixedly connected to a tapered column (22), an outer side of the tapered column (22) is fixedly connected to a push plate (23), and one end of the placement column (31) is slidably connected to an outer positioning block (24).

3. A stretching device according to claim 1, characterized in that: The stretching assembly (1) comprises a stretching assembly (1) and a stainless steel pipe (14); the stretching assembly (1) is installed with a hydraulic cylinder (12); one end of the hydraulic cylinder (12) is fixedly connected to a mounting plate (13); the outer side of the stainless steel pipe (14) is engaged with an outer positioning block (24); and the inner side of the stainless steel pipe (14) is engaged with an inner positioning block (35).

4. A stretching device according to claim 1, characterized in that: One end of the spring (34) is fixedly connected to the extension column (32), and the other end of the spring (34) is fixedly connected to the sliding column (33).

5. A stretching device according to claim 2, characterized in that: The outer side of the tapered column (22) is slidably connected to the sliding column (33).

6. A stretching device according to claim 2, characterized in that: One end of the push plate (23) is slidably connected to the outer positioning block (24).

7. A stretching device according to claim 3, characterized in that: One end of the placement column (31) away from the extension column (32) is fixedly connected to the mounting plate (13).

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