Design method of pouring for adc6 aluminum alloy die-casting mold with peninsula thin-wall structure

Abstract

The invention discloses a pouring design method of an ADC6 aluminum alloy casting die with a peninsula thin wall structure. The method includes: respectively designing ad die body part and a plurality of pouring ports according to casting processes and die designing rules; making a melt peninsula entering standard tangential line cluster according to the contour of a peninsula; selecting one point, close the pouring ports, on a body opposite to the peninsula, and designing a bridge pouring path, with a swing line, from the point to the peninsula according to the relation ship between the main direction of the peninsula and the melt flowing direction and the flowability of ADC6 so as to complete die design. The method has the advantages that the conventional linear runner is changed into standard tangential line curve fitting, the second-stage continuity property of the fitted curve is used to lower the pressure attenuation of ADC6, the casting pioneer to arrive at the thin wall smoothly, flow impact is eliminated basically, and stable filling is achieved.

Description

【Technical field】 [0001] The invention belongs to the technical field of forming and processing of metal parts, and specifically refers to a pouring design method of an ADC6 aluminum alloy die-casting mold with a peninsula thin-wall structure. 【Background technique】 [0002] ADC6 is a Japanese brand of aluminum alloy, which has the same performance as my country's national standard aluminum alloy ZL303. Its magnesium element accounts for about 4%, which is higher than conventional aluminum alloys. The advantages of using this material to produce die-casting parts are: (1) compact structure, which can be used for load-bearing parts and alternating load occasions; (2) meet the requirements of high strength and lightweight; (3) good corrosion resistance. Its shortcomings are: (1) high magnesium content, poor material flow properties, difficult to form thin-walled parts, limiting its lightweight range; (2) strong hot brittleness; (3) die-casting alloy smelting process and The m...

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Problems solved by technology

Its shortcomings are: (1) high magnesium content, poor material flow properties, difficult to form thin-walled parts, limiting its lightweight range; (2) strong hot brittleness; (3) die-casting alloy smelting process and The molding process needs to be redesigned or improved, and the mold design is also difficult

The flow performance of ADC6 itself is poor. Even if the filling distance is short, if the pressure decay of the melt is large, it will also cause the problem of filling dissatisfaction.

[0005] At present, in order to solve the thin-wall molding problem of ADC6, the industry mainly adopts the following methods: (1) Increase the heating temperature, but due to the high content of Mg element, it will bring about the problems of "overburning" and "oxidation"

(2) In the manufacturing process of the mold, the surface quality of the runner processing should be improved as much as possible, but the machining accuracy cannot be improved without limit; (3) The "bridge" structure is adopted to shorten the flow distance as much as possible. As mentioned above, The effect is always limited

In fact, in the die-casting process, although the short process is beneficial to reduce pressure and temperature loss, it will also bring turbulent flow of the melt, resulting in defects such as pores and slag inclusions.

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