Process for manufacturing medial wall concave block in LZC oil sump

Abstract

The invention relates to a manufacturing process of a concave block arranged on the inner side wall of a LZC oil sump, comprising the following steps: a sloping-roof knockout core is adopted for shortening the contact area of a sloping-roof sliding pair; the four sides of a slider are all provided with slopes; perform a plurality of nitrogen treatments on the sloping-roof surface during die producing process and die casting process; the service temperature of the die is estimated between 150 to 250 degrees centigrade; figure out the clearance of the sloping-roof sliding pair and use the minimum clearance calculation result to produce the sloping-roof sliding pair; adjust and dress the die gradually to obtain a reasonable trimmed value and control the optimal clearance; control the temperature of the sloping-roof sliding pair between 150 to 250 degrees centigrade; control the specific die casting pressure in the die cavity under 850 kilograms per square centimeter; and control the injecting velocity of the ingate under 3.5 meters per second. The method has the advantages that the process of die casting, forming and demoulding is performed automatically; the labor intensity of the operator is reduced; the production safety is good, the product quality is stable and reliable and the productivity is greatly increased.

Description

technical field [0001] The invention relates to a method for manufacturing an LZC oil sump, in particular to a method for manufacturing an inner wall concave block of the oil sump. Background technique [0002] LZC oil pan is a large aluminum alloy die-casting part used in automobile engines. It needs to be produced by die-casting on a 2000T die-casting machine. When designing the workpiece, there must be a concave block on the inner wall of the workpiece. The concave block is at the bottom of the part, the inside is large and the outside is small, and the shape of the concave block is complex, the slider is easy to get stuck and cannot fall off, and the risk will be high. Another difficulty is that the molten aluminum will produce flash during die-casting. The generation of flash is related to the temperature and fluctuation range of the mold, the casting temperature of the molten aluminum, the injection speed and the injection force. The flash enters the inclined top slide...

AI Technical Summary

Problems solved by technology

This concave block is at the bottom of the inside of the part, the inside is large and the outside is small, and the shape of this concave block is complex, the slider is easy to get stuck and cannot fall off, the risk will be very high

Another difficulty is that the molten aluminum will produce flash during die-casting. The generation of flash is related to the temperature and fluctuation range of the mold, the casting temperature of the molten aluminum, the injection speed and the injection force. The flash enters the inclined top slide The distribution part will cause the inclined top to bite and get stuck

[0003] The existing technology generally adopts the method of inserting blocks. After the die-casting is demoulded, the inserts are removed, and then installed on the mold for the next die-casting. It is also possible to make more inserts, but the die-casting cycle is slow, which increases the labor intensity of the operator. , poor security

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