Pipe fitting inside expansion clamping device

Abstract

The invention discloses a pipe fitting inside expansion clamping device which comprises a positioning cylinder. The side wall of the positioning cylinder is provided with two sets of through holes, the centers of each set of the through holes are located on the same circumference, the circle center of the circumference is located on the axis line of the positioning cylinder, positioning balls are arranged in the through holes and in clearance fit with the through holes, and the diameter of the positioning balls is larger than the depth of the through holes; two conical tables are arranged in the positioning cylinder and face the same direction, both the big diameter ends of the two conical tables make contact with the inner wall of the positioning cylinder, the two conical tables abut against the positioning balls in the two sets of through holes respectively, a connection rod is arranged between the two conical tables, the small diameter ends, located on the outer sides of the conical tables, of the two conical tables are connected with a pull rod, and the pull rod stretches out of the positioning cylinder. The pipe fitting inside expansion clamping device overcomes the technical defects that a pipe fitting is easy to fracture when an existing pipe fitting clamp clamps the pipe fitting, and the existing pipe fitting clamp cannot finish pipe fitting outer wall machining at a time and achieves the purposes that the pipe fitting is not prone to fracture when the pipe fitting is clamped, and pipe fitting outer wall machining can be finished at a time.

Description

technical field [0001] The invention belongs to the field of mechanical processing, and in particular relates to an internal expansion and clamping device for pipe fittings. Background technique [0002] Pipe fittings are usually used in the equipment assembly process. In order to better match and connect with other equipment, it is usually necessary to process the outer wall of the pipe fittings. At present, the clamping device usually used when processing pipe fittings is a clamping jaw. The jaws grip the outer wall of the pipe. However, since the side walls of the pipe fittings are usually relatively thin, when the outer wall of the hollow pipe fitting is clamped with the jaws, if the force is too large, the side wall of the pipe fitting is likely to be broken; if the force is too small, the pipe fitting cannot be clamped; in addition, When processing pipe fittings, it is usually necessary to process the entire outer wall of the pipe fitting, such as machining axial thro...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a pipe fitting that is not easy to cause the pipe to break when clamping the pipe fitting, and can complete the pipe fitting at one time, aiming at the technical defect that the existing pipe fitting fixture is easy to cause the pipe to break when clamping the pipe, and cannot complete the processing of the outer wall of the pipe at one time. Internal expansion and clamping device for pipe fittings processed on the outer wall

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