Features of the Profile Correction of Formers for Tooling the End Surfaces of Pipes

Abstract

In this paper, the question of the design features of the tool for trimming the end surfaces of pipes is considered. For large-scale and mass production it is expedient to use the tooling with formers instead of sequential or multi-tool processing, which increases the productivity and provides the exact shape and dimensions of the same parts. However, there are some difficulties in the design of formers, which consist in determining the geometric parameters of the cutting edge. While for the radial and tangential formers this question is described in detail in the technical literature, there is a deficit of information for the axial tool. In this connection, a method was developed for calculating the profile of the cutting edge of axial formers for tooling the end surfaces of pipes. A mathematical model which is based on the original data (the outer and inner diameter of the pipe, the parameters of the chamfers or roundings, cutting angles) was created, it allows to construct the contour of the cutting part of the tool. The proposed method for correcting the profile of the axial former is used to compile a program for calculating the profiles of formers for tooling the end surfaces of tube rolled products manufactured at JSC “Chepetsky Mechanical Plant” (Glazov).