Layered Turning Technology of Large Pitch External Thread

Abstract

The invention relates to an external thread turning process, in particular to a coarse-pitch external thread layered turning process. The process aims at solving the problem that by means of existing thread turning methods, because the requirements for massive removal and high-precision machining of coarse-pitch external threads can not be met, thread surface machining principle errors and cutter marks exist in coarse-pitch external thread turning, the problem that because of the overlarge cutting load, cutter abrasion is quick, and the problem that because of staggered threads and an excessively large number of layered cutting times caused by cutter starting point error accumulation, the machining efficiency is low is solved. The process includes the process of conducting rough machining by removing thread rough machining allowance through multiple cutting edges in a radial continuous multi-time feed layered cutting mode and a left-right axial multi-time layered cutting mode, and the process of conducting semi fine machining and fine machining in a layered cutting mode by feeding the left cutting edge and the right cutting edge alternately multiple times in the axial direction. The requirements for the machining precision and the machining surface quality of external threads are met, obtained left and right threaded faces are free of cutter marks, the problem that threads are meshed in disorder is solved, and the requirement for efficiently turning coarse-pitch external threads in a high-quality mode is met.

Description

technical field [0001] The invention relates to an external thread turning process, in particular to a large-pitch external thread layered turning process, and belongs to the technical field of turning processes. Background technique [0002] External threads with a pitch greater than 4mm are defined as large-pitch external threads. These parts are used as large-scale press adjustment component screws to control the position accuracy between the upper and lower templates, which has an important impact on the static and dynamic accuracy of the press machine. Large-pitch external thread has wide and deep grooves, large pitch and axial length, and is a non-standard thread with a large machining allowance, high pitch and tooth profile accuracy, and high thread surface quality requirements. [0003] The existing processing methods for large-pitch external threads mainly include milling, grinding, turning, and forming; the forming process has a large load and is difficult to meet ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the thread turning processing method in the prior art, which is mainly used for thread processing of small and medium-sized pitches, and cannot meet the requirements of large margin removal and high-precision processing of large-pitch external threads, so that there are existing problems in large-pitch external thread turning. The principle error and contact mark of thread surface processing, the tool wear caused by excessive cutting load, the thread disorder caused by the accumulation of starting point error and the excessive number of layered cutting lead to the reduction of processing efficiency, etc.

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