Process for preventing deformation of wheel disk of semi-gear rim

Abstract

A process for preventing deformation of a wheel disk of a semi-gear rim meets a supplementing shrinkage requirement of a casting, also ensures a qualified size of the casting, and improves the quality of the casting. The technical schemes for solving the problems are that: 1, a processed part of a wheel rim excircle is inclinedly placed, so that the casting can be artificially allowed to form a sequence solidification state, a casting part away from a riser is firstly solidified, then a part close to the riser is solidified, finally the riser is solidified, and a temperature gradient of the solidification process is controlled; and 2, the wheel disk is not manufactured horizontally no longer, while an anti-deformation process is employed, and an anti-deformation amount is adjusted according to a specific size of the semi-gear rim.

Description

technical field [0001] The invention belongs to the technical field of casting, in particular to a process for preventing the deformation of the web plate of a half ring gear used in industrial equipment. Background technique [0002] Half ring gears are used in many large-scale equipment, such as rotary kilns, granulators, coolers, mills and other industries; due to the needs of transmission, these industries are inseparable from half ring gears, the quality of half ring gears, It directly affects the life of the equipment, the performance of the equipment and the stability of the transmission. In recent years, the foundry industry has been developing day by day, and the quality requirements are also getting higher and higher. The design requires that the castings should not have defects such as cracks and shrinkage porosity. [0003] The half ring gear is a complex part with large size and uneven wall thickness, so the cooling rate is uneven, resulting in temperature diff...

AI Technical Summary

Problems solved by technology

Due to the strict quality requirements of castings, the current casting method is as follows: the rim part is placed with a whole ring of thermal insulation risers according to the ratio of heat joints and rim heights to meet the quality requirements of internal flaw detection of castings. However, the castings produced by the existing casting process There are the following problems: (1) The machining amount of the outer circle of the riser surface of the rim becomes smaller

(2) The radial plate is inclined and sinks, causing the inner flange and the boss to sink as well

After analysis and research, in order to ensure that the casting is qualified for flaw detection, a full-circle riser is placed. Although the internal quality problem solved by the full-circle riser meets the flaw detection requirements, the cooling speed is slow due to the large volume of the riser and the concentrated heat, which is not easy to dissipate heat. , the shrinkage is larger than that of the general circular riser, which drives the rim riser surface to shrink inward as a whole, and the spoke plate, inner flange and boss also sink

This phenomenon seriously affects the size and quality requirements of the half ring gear

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