Clamping tool for bent pipe

Abstract

The utility model relates to a clamping tool for a bent pipe, which comprises a workpiece, a straight pipe clamping tool and a bent pipe clamping tool, the workpiece comprises a straight pipe part and a bent pipe part, the straight pipe clamping tool is arranged on the straight pipe part, and the bent pipe clamping tool is arranged on the bent pipe part. The straight pipe clamping tool and the bent pipe clamping tool are arranged and correspondingly installed on the straight pipe portion and the bent pipe portion of the workpiece respectively, clamping of different portions is achieved, the tool has good adaptability to the straight pipe and the bent pipe, the tool can completely seal the two ends of the bent pipe, and when sand blasting and spraying are carried out on the outer surface of the bent pipe, the work efficiency is greatly improved. And abrasive blasting materials and powder coatings cannot enter the inner wall of the bent pipe.

Description

A clamping fixture for bending pipes Technical Field

[0001] This utility model relates to the field of clamping tooling technology, and in particular to a clamping tooling for bending pipes. Background Technology

[0002] In the coating production process, in addition to coating the inside of conventional drill pipes, it is also necessary to sandblast and coat the outer surface of bent pipes. The existing tooling fixtures cannot meet the requirements for sandblasting and coating the outer surface of bent pipes. In order to meet production needs, a new tooling fixture for sandblasting and coating the outer surface of bent pipes is adopted to achieve sandblasting and coating of the outer surface of bent pipes and improve the diversity of coating products.

[0003] Utility model patent CN216730796U discloses a tooling for machining the weld beveling of small-diameter bent pipe ends, including a tool clamping device and a pipe fixing device. The tool clamping device is clamped and fixed to the spindle of a horizontal lathe via a lathe chuck and rotates with the spindle. The pipe fixing device is mounted on the lathe tool post, the bent pipe workpiece is mounted on the pipe fixing device, and the forming tool is mounted on the tool clamping device. This utility model can accommodate the assembly of bent pipes of different specifications and bending angles by changing the size of the positioning groove in the inner hole of the pipe fixing device. The pipe fixing device is equipped with a clamping wrench; rotating the clamping wrench loosens the fixing bolts, enabling quick loading and unloading of the bent pipe. However, this patent cannot effectively coat the outer surface of the bent pipe.

[0004] Therefore, providing a clamping fixture that can easily spray paint the outer surface of bent pipes is an urgent problem to be solved. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a clamping fixture for bending pipes.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] According to one aspect of the present invention, a clamping fixture for bending pipes is provided, comprising a workpiece, a straight pipe clamping fixture and a bending pipe clamping fixture, wherein the workpiece comprises a straight pipe portion and a bent pipe portion, the straight pipe clamping fixture is mounted on the straight pipe portion and the bending pipe clamping fixture is mounted on the bent pipe portion.

[0008] As a preferred technical solution, both the straight pipe clamping fixture and the bent pipe clamping fixture include steps, and the straight pipe clamping fixture and the bent pipe clamping fixture are respectively installed in the straight pipe section and the bent pipe section through the steps.

[0009] As a preferred technical solution, the straight pipe clamping fixture is cylindrical.

[0010] As a preferred technical solution, the pipe bending clamping fixture includes a conical portion that is conical in shape.

[0011] As a preferred technical solution, the conical part of the pipe bending clamping fixture extends into the pipe bending part of the workpiece.

[0012] As a preferred technical solution, the structure of the conical portion is determined by the inner wall diameter of the workpiece.

[0013] As a preferred technical solution, both the straight pipe clamping fixture and the bent pipe clamping fixture include multiple suspension holes, which are evenly distributed on the straight pipe clamping fixture and the bent pipe clamping fixture.

[0014] As a preferred technical solution, the clamping fixture further includes a suspension unit, which includes a hook and a suspension hole.

[0015] As a preferred technical solution, both the straight pipe clamping fixture and the bent pipe clamping fixture further include multiple fixing bolts, which are evenly distributed on the straight pipe clamping fixture and the bent pipe clamping fixture.

[0016] As a preferred technical solution, the straight pipe clamping fixture and the bent pipe clamping fixture are fixed to the workpiece by fixing bolts, respectively.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. This utility model provides a straight pipe clamping fixture and a bent pipe clamping fixture, which are respectively installed on the straight pipe section and the bent pipe section of the workpiece to achieve clamping of different parts. It has good adaptability to straight pipes and bent pipes. The fixture of this utility model can completely seal both ends of the bent pipe, so that when sandblasting or spraying the outer surface of the bent pipe, the sandblasting abrasive and powder coating will not enter the inner wall of the bent pipe.

[0019] 2. This utility model is provided with a conical part, which is designed according to the size of the bend, so as to avoid interference with the inside of the bend. At the same time, the conical part can better extend into the bend and better fix the bend.

[0020] 3. This utility model is equipped with fixing bolts, which are used to install the workpiece together with the straight pipe clamping fixture and the bent pipe clamping fixture respectively, thereby improving safety.

[0021] 4. This utility model is equipped with a hanging hole and a hook. Through the cooperation of the hanging hole and the hook, the workpiece is suspended, which facilitates sandblasting and spraying on the outer surface of the bent pipe. Attached Figure Description

[0022] Figure 1 is a three-dimensional structural diagram of this utility model;

[0023] Figure 2 is a cross-sectional structural diagram of this utility model;

[0024] Figure 3 is a schematic diagram of the pipe bending clamping fixture structure of this utility model;

[0025] Figure 4 is a schematic diagram of the tooling effect of this utility model;

[0026] 1. Straight pipe clamping fixture; 2. Workpiece; 3. Bending pipe clamping fixture; 4. Fixing bolt; 5. Hanging hole. Detailed Implementation

[0027] 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, not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present utility model.

[0028] This invention addresses the current limitations of tooling in effectively spraying coatings onto the outer surface of workpieces while ensuring that the coating does not penetrate the inner wall of the workpiece.

[0029] This invention provides a clamping fixture for bending pipes. By setting up straight pipe clamping fixtures and bending pipe clamping fixtures, which are respectively installed on the straight and bent sections of the workpiece, this invention achieves clamping of different parts and has good adaptability to both straight and bent pipes. The fixtures completely seal both ends of the bent pipe, preventing abrasive and powder coating from entering the inner wall of the bent pipe during sandblasting or spraying. The invention includes a conical section designed according to the dimensions of the bent pipe to avoid interference with the inside of the pipe and to better extend into it for better fixation. Fixing bolts are provided to secure the workpiece to both the straight and bent pipe clamping fixtures, improving safety. Suspension holes and hooks are provided to suspend the workpiece, facilitating sandblasting and spraying of the bent pipe's outer surface.

[0030] Example 1

[0031] As shown in Figures 1-4, a clamping fixture for bending pipes includes a workpiece 2, a straight pipe clamping fixture 1, and a bending pipe clamping fixture 3. The workpiece 2 includes a straight pipe section and a bent pipe section. The straight pipe clamping fixture 1 is installed on the straight pipe section, and the bending pipe clamping fixture 3 is installed on the bent pipe section.

[0032] In this embodiment, the clamping fixture of the present invention can clamp the inner walls of both ends of the bent tube (i.e., workpiece 2), thereby enabling sandblasting and coating of the outer surface of the bent tube (workpiece 2), ensuring that the sandblasting abrasive and coating paint do not enter the inner wall of the bent tube (workpiece 2) during the sandblasting and coating process.

[0033] Both the straight pipe clamping fixture 1 and the bent pipe clamping fixture 3 include steps, and are respectively installed inside the straight pipe section and the bent pipe section via the steps. The straight pipe clamping fixture 1 is cylindrical. The overall cylindrical shape of the straight pipe clamping fixture 1 is used to better fit the inner wall of the straight pipe section.

[0034] The pipe bending clamping fixture 3 includes a conical portion. The conical portion of the pipe bending clamping fixture 3 extends into the pipe bending portion of the workpiece 2. The conical shape allows for better insertion into the pipe bending portion.

[0035] The structure of the conical part is determined by the inner wall diameter of the workpiece 2.

[0036] In this embodiment, by rationally designing the structure of the conical section, interference and collision with the inner wall of the bend can be avoided when the conical section extends into the bend. The taper of the conical section must be greater than the dimension Δt, where Δt is the length of the bottom of the cone minus the length of the top, where the length of the bottom of the cone is the diameter of the inner wall of the bend, and the length of the top is less than the length of the bottom.

[0037] Both the straight pipe clamping fixture 1 and the bent pipe clamping fixture 3 include multiple suspension holes 5, which are evenly distributed on the straight pipe clamping fixture 1 and the bent pipe clamping fixture 3. The clamping fixture also includes a suspension unit, which includes a hook and is connected to the suspension holes 5.

[0038] Both the straight pipe clamping fixture 1 and the bent pipe clamping fixture 3 include multiple fixing bolts 4, which are evenly distributed on the straight pipe clamping fixture 1 and the bent pipe clamping fixture 3.

[0039] The straight pipe clamping fixture 1 and the bent pipe clamping fixture 3 are fixed by the fixing bolts 4 and the workpiece 2, respectively.

[0040] In this embodiment, at one end of the straight pipe section of the bent pipe (workpiece 2), the end of the straight pipe clamping fixture 1 with a cap is inserted into the straight pipe section, with the stepped surface pressed against the end face of the straight pipe section. The straight pipe clamping fixture 1 is then fixed using four bolts evenly distributed at 90° intervals. At the other end of the bent pipe (workpiece 2), at the bent pipe section, the end of the bent pipe clamping fixture 3 with a cap is inserted into the bent pipe section, with the stepped surface pressed against the end face of the bent pipe section. The bent pipe clamping fixture 3 is then fixed using four bolts evenly distributed at 90° intervals. After the clamping fixtures at both ends of the bent pipe (workpiece 2) are fixed, hooks can be used to hook the suspension holes 5 on the clamping fixtures to suspend the bent pipe for external surface sandblasting and spraying, as shown in Figure 4. The suspension holes 5 are also evenly distributed at 90° intervals.

[0041] The working process of this utility model device is as follows:

[0042] The straight pipe clamping fixture 1 is partially inserted into the workpiece 2, positioned by a step, and then fixed to the workpiece 2 with four bolts. The other part of the clamping fixture, not inserted into the workpiece 2, has hanging holes 5, and hooks can hook onto the hanging holes 5 at both ends of the bent pipe. The installation method of the bent pipe clamping fixture 3 is similar to that of the straight pipe clamping fixture 1. The hooks can hook onto the hanging holes 5 at both ends of the bent pipe, thus suspending the workpiece 2 for sandblasting and spraying.

[0043] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A clamping fixture for bending pipes, characterized in that, The device includes a workpiece (2), a straight pipe clamping fixture (1), and a bent pipe clamping fixture (3). The workpiece (2) includes a straight pipe section and a bent pipe section. The straight pipe clamping fixture (1) is installed on the straight pipe section, and the bent pipe clamping fixture (3) is installed on the bent pipe section.

2. The clamping fixture for bending pipes according to claim 1, characterized in that, Both the straight pipe clamping fixture (1) and the bent pipe clamping fixture (3) include steps, and the straight pipe clamping fixture (1) and the bent pipe clamping fixture (3) are respectively installed in the straight pipe section and the bent pipe section through the steps.

3. The clamping tool for bending a pipe according to claim 1, wherein The straight pipe clamping fixture (1) is cylindrical.

4. The clamping fixture for bending pipes according to claim 1, characterized in that, The pipe bending clamping fixture (3) includes a conical part that is conical in shape.

5. A clamping fixture for bending pipes according to claim 4, characterized in that, The conical part of the pipe bending clamp (3) extends into the pipe bending part of the workpiece (2).

6. A clamping fixture for bending pipes according to claim 5, characterized in that, The structure of the conical part is determined by the inner wall diameter of the workpiece (2).

7. The clamping tool for bending a pipe according to claim 1, wherein Both the straight pipe clamping fixture (1) and the bent pipe clamping fixture (3) include multiple suspension holes (5), which are evenly distributed on the straight pipe clamping fixture (1) and the bent pipe clamping fixture (3).

8. A clamping tool for bending a pipe according to claim 7, characterized in that The clamping fixture also includes a suspension unit, which includes a hook and a suspension hole (5).

9. A clamping fixture for bending pipes according to claim 1, characterized in that, The straight pipe clamping fixture (1) and the bent pipe clamping fixture (3) each include a plurality of fixing bolts (4), which are evenly distributed on the straight pipe clamping fixture (1) and the bent pipe clamping fixture (3).

10. A clamping fixture for bending pipes according to claim 9, characterized in that, The straight pipe clamping fixture (1) and the bent pipe clamping fixture (3) are fixed by fixing bolts (4) and workpiece (2), respectively.

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