Method for dividing model of casting crankshaft

Abstract

The present invention relates to a crankshaft casting mold mold-parting method. It is mainly characterized by that it can be divided into upper and lower two molds by utilizing intermediate every connecting-bar curved face along the central line of two-end main shaft connecting-bar; the parting face of intermediate every connecting bar is parallel to maximum section and is moved downwards so as to make cod be shallowed; in the position correspondent to the connecting bar in the mold a mold-drawing padding is set; according to the connecting-bar shaft neck circular arc form said invention adopts curved face parting process to make crankshaft mold.

Description

technical field [0001] The invention relates to a casting method, in particular to a crankshaft casting model splitting method. Background technique [0002] We know that the crankshaft is one of the important machine parts, its structure and stress are complex, the workload is heavy, and the requirements for internal metallurgical quality, casting quality and forming precision are very high. Due to the irregular shape, it is easy to produce casting defects, which brings trouble to the finishing of the crankshaft blank. The parting method of the casting model is very critical for the demoulding operation and crankshaft forming. The traditional model classification method is along the center line, adopts plane classification, and splits as a whole. Generally, the parting (type) surface is selected at the largest cross-section of the casting, but due to the different structural design of the crankshaft, the axes of the connecting rods are often not on the same plane (0° or 1...

AI Technical Summary

Problems solved by technology

Generally, the parting (type) surface is selected at the largest cross-section of the casting, but due to the different structural design of the crankshaft, the axes of the connecting rods are often not on the same plane (0° or 180°), which leads to partial connection when parting the parting (type). The rod is either in the upper box or in the lower box. In this way, the designer usually cannot design the core seat at the place where the mold is drawn, and design the core box accordingly and make the core. After molding, the core is placed in the cavity. Make it form a complete structure; on the high-efficiency automatic molding line, due to the fast production pace, it is necessary to place the core, which affects the production efficiency on the one hand, and on the other hand, the labor intensity of the workers is relatively high; the use of cores requires core-making equipment Or manual core making increases investment and production costs. Due to the large amount of gas generated by the core, especially the resin core, it is easy to cause casting waste such as pores. For large-scale and automated production, the production preparation time is long, and the core During transportation and turnover, it is prone to moisture and damage from time to time

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