The doe method of surface hole control in aluminum alloy precision die casting machining

Abstract

The invention discloses a new technology for effectively controlling the size and quantity of surface holes of aluminum alloy precision die-casting parts during processing by using Design-Expert software. The size, quantity and distribution of surface holes are important symbols for measuring the quality of castings. Casting holes that often occur on the surface of precision die-casting parts during machining and are difficult to predict and control, thereby reducing the quality of aluminum alloy precision die-casting parts. ‑Expert software selection standard, measure the size and quantity of the internal casting holes, simulate the law of the size and quantity of the internal casting holes of the aluminum alloy precision die-casting parts under the same production parameters of the batch, and adjust the machining allowance of the parts on this basis , so that the surface holes and dimensions of the final aluminum alloy die-casting parts meet the requirements of the drawing, and the pass rate of the product reaches 90%, thus effectively reducing the scrap rate.

Description

technical field [0001] The invention relates to a DOE method for surface hole control during machining of aluminum alloy precision die castings, and belongs to the technical field of aluminum alloy die casting quality control. Background technique [0002] Aluminum alloy precision die casting is the most productive of all casting methods for automotive parts. It is a casting method that fills the mold with liquid or semi-liquid metal at high speed under high pressure and solidifies into a casting under pressure. Porosity is unavoidable when die-casting parts are filled in the cavity, especially when holes appear on the surface of the die-casting workpiece, it will seriously affect its quality and lead to scrapping. Therefore, it is of great significance to study the method of controlling and reducing the surface holes of die castings to improve their mechanical properties and product quality. [0003] The present invention takes the holes in aluminum alloy precision die-ca...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a DOE method for surface hole control of aluminum alloy precision die castings during machining, which overcomes the fact that the existing control of the machining allowance of aluminum alloy precision die castings is often based on past experience and has great randomness And the lack of uncertainty, through the present invention, under the premise of certain aluminum alloy precision die-casting production process parameters, it provides a technology to control the size and quantity of holes on the surface of aluminum alloy die-casting parts, so as to solve the problems caused by the leakage of holes in actual production. To solve the problem of high scrap rate during die casting processing, improve its mechanical properties and improve product quality

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