CN218612903U - Round pipe machining clamp - Google Patents

Abstract

The utility model discloses a clamp for processing round pipes, which comprises a center rod, a limit tube is sheathed outside the center rod, two ends of the center rod protrude from the two ends of the limit tube, and the center rod The outside of the protruding end of each is equipped with an expansion sleeve, and the expansion sleeve is sleeved between the expansion sleeve and the central rod through an elastic mechanism to limit and fix it. The expansion sleeve is inserted into the round tube for Clamping fixed. The device is in close contact with the inside of the pipe through the expansion sleeve, and two points are fixed inside the pipe, so that the stability of the round pipe is better during processing, and because the clamp is fixed by contacting the inside of the round tube, the clamp and There is no contact point on the outer circle, so the turning and grinding process can be carried out on the entire outer circle, so as to ensure the dimensional accuracy, fit tolerance, surface finish, etc. of the round pipe fittings.

Description

A round pipe fitting processing fixture

technical field

The utility model relates to the technical field of mechanical processing, in particular to a clamp for processing round pipes.

Background technique

With the increase of market demand for round pipe fittings, the production volume of round pipe fittings is increasing. In order to ensure the dimensional accuracy, fit tolerance, and surface finish of round pipe fittings, it is necessary to turn and grind the outer circle of round pipe fittings.

The fixture is used for positioning and clamping the workpiece, which has the functions of ensuring the stability and reliability of the workpiece, achieving the machining accuracy, shortening the processing time, reducing the production cost and expanding the technological range of the machine tool. When processing a round tube with one end closed and the other open The fixture needs to limit the two ends of the round tube at the same time to ensure the stability of the workpiece during processing. However, when limiting the closed end, it is necessary to set a limit piece on the outer circle. At this time, it is difficult to ensure that the entire round tube The outer circle is processed. At the same time, when the existing fixture clamps the round tube, it will cover part of the outer circle of the round tube, so that the outer circle of the round tube cannot be processed at one time, resulting in a reduction in processing efficiency.

Utility model content

The purpose of this utility model is to solve the shortcomings in the prior art, and propose a round pipe processing fixture, including a central rod, the outer sleeve of the central rod is provided with a limit tube, and the two ends of the central rod protrude at both ends of the limiting tube;

The outside of the protruding end of the central rod is provided with an expansion sleeve;

The expansion sleeve is sleeved between the expansion sleeve and the central rod through an elastic mechanism to limit and fix it;

The expansion sleeve is inserted into the round pipe for clamping and fixing the round pipe.

As a further description of the above-mentioned technical solution, the first expansion sleeve at the open end of the round pipe cooperates with the thread on the outside of the central rod through a coaxial stopper.

As a further description of the above technical solution, the outer coaxial limit block of the second expansion sleeve at the closed end of the circular tube is fixed to the end surface of the central rod through a screw.

As a further description of the above technical solution, the size and shape of the first expansion sleeve and the second expansion sleeve are the same.

As a further description of the above technical solution, the outer diameters of the first expansion sleeve and the second expansion sleeve when not being squeezed are not smaller than the inner diameter of the circular tube.

As a further description of the above technical solution, the expansion sleeve is a hollow cylindrical structure, and the outer circumference of the expansion sleeve is provided with a plurality of grooves from one end to the other end.

As a further description of the above technical solution, the shape and size of the small end of the limiting block are adapted to the shape and size of the opening end of the expansion sleeve.

As a further description of the above technical solution, the expansion sleeve is made of elastic material.

As a further description of the above technical solution, the expansion sleeve is made of nylon.

As a further description of the above technical solution, the elastic structure is one of a spring or an elastic washer.

The utility model has the following beneficial effects:

The utility model is close to the inside of the pipe through the expansion sleeve, and realizes two-point fixation inside the pipe, so that the stability of the round pipe is better during processing, and because the clamp is to fix the round pipe by contacting the inside of the round pipe, the clamp There is no contact point with the outer circle, and the entire outer circle can be turned and ground, so as to ensure the dimensional accuracy, fit tolerance, surface finish, etc. of the round pipe fittings.

Description of drawings

Fig. 1 is the schematic diagram that clamp main body cooperates with external circular pipe in the present application;

Figure 2 is a sectional view of the cooperation between the main body of the clamp and the external circular pipe in the present application;

Fig. 3 is the exploded schematic view of fixture in the present application;

Fig. 4 is an exploded front view of the clamp in this application.

illustration:

1. Center rod; 2. Limiting tube; 3. First expansion sleeve; 4. Second expansion sleeve; 5. Elastic mechanism; 6. Limiting block; 7. Screw; 8. Round tube.

Detailed ways

In order to better understand the purpose, structure and function of the utility model, a round pipe processing fixture of the utility model will be further described in detail below in conjunction with the accompanying drawings.

Referring to Fig. 1-Fig. 4, the embodiment provided by the utility model: the processing fixture includes a central rod 1, the outer of the central rod 1 is sleeved with a limiting tube 2, the limiting tube 2 is a hollow tube, and the outer diameter of the hollow tube is Slightly larger than the outer diameter of the center rod 1, so that the limit tube 2 can be sleeved on the outside of the center rod 1, and the length of the limit tube 2 is less than the length of the center rod 1, when the limit tube 2 is set in the middle of the center rod 1 , the two ends of the central rod 1 can protrude, and the first expansion sleeve 3 and the second expansion sleeve 4 are respectively sleeved on the outside of the two protruding ends, and a limit block 6 is arranged at the center of the expansion sleeve. The area between the block 6 and the expansion sleeve is provided with an elastic mechanism 5, and the limit block 6 is fixedly connected to the elastic mechanism 5. The elastic mechanism 5 can be any one of a spring or an elastic washer. In this embodiment Choose to use the spring, and the reaction force of the spring can prevent the limit block 6 from loosening during product processing.

Referring to Fig. 1-Fig. 2, the limit block 6 outside the first expansion sleeve 3 at the open end of the round pipe 8 cooperates with the external thread outside the circumference of the central rod 1 through its own internal thread, thereby fixing the limit block 6 , so as to fix the first expansion sleeve 3, and the limit block 6 outside the second expansion sleeve 4 at the closed end of the round tube 8 is connected with the threaded hole on the end surface of the central rod 1 through the screw rod 7 passing through the center, so as to The second expansion sleeve 4 is limited and fixed to prevent the second expansion sleeve 4 from loosening and falling off during use.

The specific use process is described below. When in use, the clamp is inserted into the inside of the round tube 8. One end of the round tube 8 is open and the other end is closed, so it can be smoothly inserted into the inside of the round tube 8. Both ends of the rod 1 are fixed with expansion sleeves. The expansion sleeve is a hollow cylinder. There are multiple grooves on the outside of the circumference of the expansion sleeve from one end to the other. When the expansion sleeve is not squeezed, its outer diameter is larger than the circle. The inner diameter of the tube 8, and when it is gradually inserted into the inside of the round tube 8, the slotted end of the expansion sleeve will gradually be squeezed and closed, and it will just fit on the inner wall of the round tube 8, so that the entire clamp and the round tube The tubes 8 are relatively fixed, because the fixture fixes the tube 8 through contact with the inside of the tube 8, and has no contact with the outside of the tube 8, so it is more convenient to turn the outer circle of the tube , The processing procedure of grinding, so as to ensure the dimensional accuracy, fit tolerance, surface finish, etc. of the round pipe fittings, and will not be interfered by the fixture.

It can be understood that the utility model is described through some embodiments, and those skilled in the art know that various changes or equivalents can be made to these features and embodiments without departing from the spirit and scope of the utility model replace. In addition, the features and embodiments may be modified to adapt a particular situation and material to the teachings of the invention without departing from the spirit and scope of the invention. Therefore, the present utility model is not limited by the specific embodiments disclosed here, and all embodiments falling within the scope of the claims of the present application belong to the protection scope of the present utility model.

Claims (10)

1. A clamp for processing round pipes, characterized in that: it comprises a central rod (1), the outer of the central rod (1) is provided with a limit tube (2), and the two ends of the central rod (1) protrude from the two ends of the limiting tube (2); The outside of the protruding end of the central rod (1) is provided with an expansion sleeve; The expansion sleeve is sleeved between the expansion sleeve and the central rod (1) through an elastic mechanism (5) to limit and fix it; The expansion sleeve is inserted into the round pipe (8) for clamping and fixing the round pipe (8). 2. The fixture for processing round pipes according to claim 1, characterized in that: the first expansion sleeve (3) at the open end of the round pipe is connected to the central rod (1) through the coaxial limit block (6) ) to match the external threads. 3. The fixture for processing round pipes according to claim 2, characterized in that: the second expansion sleeve (4) at the closed end of the round pipe is located at the outer coaxial limit block (6) through the screw (7) and the center The end face of the rod (1) is fixed. 4. The clamp for processing round pipes according to claim 3, characterized in that: the size and shape of the first expansion sleeve (3) and the second expansion sleeve (4) are the same. 5. The fixture for processing round pipes according to claim 3, characterized in that: the outer diameters of the first expansion sleeve (3) and the second expansion sleeve (4) when not squeezed are not smaller than the circle The inner diameter of the tube (8). 6 . The fixture for processing round pipes according to claim 1 , wherein the expansion sleeve is a hollow cylindrical structure, and the outer circumference of the expansion sleeve is provided with a plurality of grooves from one end to the other end. 7 . 7. The jig for processing round pipes according to claim 2, characterized in that: the shape and size of the small end of the limiting block (6) are adapted to the shape and size of the opening end of the expansion sleeve. 8. The jig for processing round pipes according to claim 1, wherein the expansion sleeve is made of elastic material. 9. The jig for processing round pipes according to claim 1, wherein the expansion sleeve is made of nylon. 10. The jig for processing a round pipe according to claim 1, wherein the elastic mechanism is one of a spring or an elastic washer.

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