An internal spline punch preventing damage to the processed surface

Abstract

The invention discloses an internal spline punch for preventing damage to the processing surface, comprising: a stamping plate, a stamping rod connected to the stamping plate, the stamping rod is connected with the punch, and a guide plate is positioned with a steel pipe to be stamped The die is connected, the die is connected with the straightening cavity which plays a straightening role, the base supports the whole device, the punch includes a first-stage stamping plate and a second-stage stamping plate, and the second-stage stamping The plate can be folded, only need to change the structure of the punch, so that the outer diameter of the punch can be changed, and it is processed in two stages, and the two stages are processed at the same clamping position, so as to eliminate the error caused by the secondary positioning, and the second stage The variable opening of processing is further deformed on the basis of the first stage, and the deformation is smaller than the first stage, so as to better protect the movable second stage stamping plate from deformation during processing, thereby prolonging the service life, and the two stages The punch can process spline tubes of two diameters at the same time, which improves the adaptability.

Description

technical field [0001] The invention relates to the field of mechanical processing, in particular to an internal spline punch for preventing damage to the processing surface. Background technique [0002] At present, in the existing technology, the inner spline tube or sleeve is generally formed by broaching with a broach, and the length-to-diameter ratio limit of the broached spline is generally not more than 6 times, but we are now involved in the spline of the automobile steering machine The length-to-diameter ratio of the internal spline of the pipe column has reached 10 times, which is difficult to achieve by broaching with a broach. For example, a spline pipe with a relatively large length-to-diameter ratio can also be produced by using the swaging technology, but the investment cost of the swaging technology is high , the risk is high, the productivity is low, and it is not practical enough, so some of them use stamping to process relatively long tubular workpieces to...

AI Technical Summary

Problems solved by technology

[0002] At present, in the existing technology, the inner spline tube or sleeve is generally formed by broaching with a broach, and the length-to-diameter ratio limit of the broached spline is generally not more than 6 times, but we are now involved in the spline of the automobile steering machine The length-to-diameter ratio of the internal spline of the pipe column has reached 10 times, which is difficult to achieve by broaching with a broach. For example, a spline pipe with a relatively large length-to-diameter ratio can also be produced by using the swaging technology, but the investment cost of the swaging technology is high , the risk is high, the productivity is low, and it is not practical enough, so some of them use stamping to process relatively long tubular workpieces to form internal spline tubes. However, with the development of industry, the requirements for the depth of splines are getting more and more High, when the pipe diameter remains the same, the deeper the spline is required, it means that the deformation of the base pipe will be large, but the traditional one-time molding will cause too much deformation of the base pipe at one time, resulting in uneven deformation, so that the quality of the spline tube is not good. It meets the requirements. Now there is the technology of two-time molding, but the two-time molding is processed by separate stations, which causes the secondary positioning error to be too large, and the secondary positioning requirements are high. Not only is the efficiency low, but the processing quality is not high, and the scrap rate remains high. , resulting in an increase in cost, and it is easy to cause damage to the processed spline surface during the return process of the punch, resulting in failure

Images