Special-shaped plate part hot precision forging forming mould cavity correction method

Abstract

The invention discloses a special-shaped plate part hot precision forging forming mould cavity correction method. According to the method, a mathematic model, the profile of which deforms in the hot precision forging process on the basis of a force piece and a mould, is established; and the mathematic model comprises mould heat expansion td, force piece cold deflation tw, mould stress elastic expansion ed and force piece mould-out springback ew. The established mathematic model gives full consideration to various deformation factors in the hot precision forging process, so that the factors influencing the precision of the hot precision forging are well revealed; a mathematic functional expression is used for calculating mould cavity correction and the calculation method is simple, rapid and convenient for engineering application; and the correction method is high in correctness, and can be used for effectively improving the hot precision forging forming precision so as to decrease the subsequent precision machining margin and even satisfy the requirement for direct use.

Description

technical field [0001] The invention belongs to the technical field of precise forging processing of disk parts, and in particular relates to a method for correcting a mold cavity of a special-shaped disk part by hot precision forging. Background technique [0002] Disc parts are widely used in various industrial products, such as gears, flanges, wheels and pulleys, etc. The design and manufacturing level directly affects the quality of industrial products, and is related to the quality of equipment manufacturing and the development level of the national economy . Due to its wide demand, the processing of disk parts has the following characteristics and requirements: the output of products is large, so there are strict requirements on production cost and material utilization rate, and at the same time, high requirements on manufacturing precision and product performance are required to ensure a long service life of parts . At present, the processing technology of disc part...

AI Technical Summary

Problems solved by technology

[0004] Special-shaped disk parts have complex shapes, and there are asymmetrical and other special-shaped shapes. During the hot forming process, the deformation of the surface of the parts is uneven, resulting in low forming accuracy. Many disk parts require high processing accuracy, such as gear transmission on noise. and transmission stability are high, so the requirements for gear involute tooth profile accuracy are strict

In the process of hot precision forging, forgings and molds are heated and subjected to complex deformation, and the machining accuracy is difficult to control. At this stage, the precision of hot precision forging is generally 0.1mm to 0.5mm

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