Core ball connecting device for restraining shaking of core ball during bending of pipe fitting

Abstract

The invention discloses a core ball connecting device for restraining shaking of a core ball during bending of a pipe fitting. A first connecting body, a second connecting body and a star-shaped driving disc are coaxially installed, one end of a reset spring is fixedly connected into an arc-shaped sliding groove of a first rotating disc, the other end of the reset spring is fixedly connected with a reset push plate on the second connecting body, one end of a pressure spring is fixedly connected into a limiting groove of the star-shaped driving disc, the other end of the pressure spring is fixedly connected with a wedge-shaped block in a rectangular sliding groove of the star-shaped driving disc, an electromagnet is installed in a rectangular hole of the star-shaped driving disc, when the electromagnet is not powered on, the second connecting body can only rotate in one direction relative to the first connecting body under the extrusion effect of the wedge-shaped block, and when the electromagnet is powered on, the second connecting body can rotate in two directions relative to the first connecting body, and the second connecting body can return to the initial position under the action of the reset spring. The core ball connecting device can be used for connecting multi-ball-joint mandrels used in pipe fitting bending, shaking of the core ball can be restrained, and the bending quality is improved.

Description

technical field [0001] The invention belongs to the field of bending and forming of pipe fittings, and in particular relates to a core ball connection device used for bending pipe fittings and suppressing core ball shaking. Background technique [0002] Pipe bending is widely used in various industrial fields, and the technology of numerical control pipe bending continues to develop and progress. In the bending process of pipe fittings, in order to reduce or eliminate defects such as pipe wall collapse, cross-sectional distortion, and wrinkling, the method of cored bending is generally adopted, and fillers such as mandrels are placed in the pipe to be bent as supports for pipe bending. Among them, the flexible mandrel is used as the support when the bending quality of the pipe fittings is high. The multi-joint connection structure of the flexible mandrel mainly includes the chain type and the ball joint type. The multi-ball joint flexible mandrel can effectively Controls th...

AI Technical Summary

Problems solved by technology

[0003] The chain connection method is generally used for flat bending of pipe fittings. The multi-ball joint mandrel used in pipe bending includes a mandrel and multiple core balls. Because the diameter of the core ball is slightly smaller than the inner diameter of the pipe fitting, there is a certain gap between the two. When the pipe is bent, the core ball will vibrate due to the collision of the pipe against the core ball, which will affect the quality of the bent section and the wall thickness of the pipe

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