An automatic inner core-pulling device for a low-pressure casting mold of an automobile aluminum alloy wheel hub

Abstract

The invention provides an automatic inner core pulling device for an automobile aluminum alloy hub low pressure casting mould. The device comprises a core pulling main connection rod, a first-stage transmission connection rod, a second-stage transmission connection rod and a core pulling sliding block; the core pulling main connection rod penetrates an upper mold plate, an ejector rob pressing plate and an ejector rod plate; one end of the core pulling main connection rod is connected with a core pulling plate; the other end of the core pulling main connection rod is connected with one end of the first-stage transmission connection rod; the other end of the first-stage transmission connection rod is connected with one end of the second-stage transmission connection rod; the other end of the second-stage transmission connection rod is connected with the core pulling sliding block; the core pulling sliding block and a hole formed in the bottom of an upper mold and matched with a core pulling connection rod sliding block mechanism are in a matched and separated state; and the middle portion of the first-stage transmission connection rod is connected with a supporting frame. The automatic inner core pulling device for the automobile aluminum alloy hub low pressure casting mould is further provided with a main pressing block and an auxiliary pressing block which are matched with the core pulling connection rod sliding block mechanism to achieve positioning of the core pulling connection rod sliding block mechanism. The core pulling device is simple in structure, the work efficiency of workers is improved when the device is utilized for machining a hub, and cost is reduced.

Description

technical field [0001] The invention relates to the field of low-pressure casting, in particular to an automatic inner core-pulling device for a low-pressure casting mold of an automobile aluminum alloy wheel hub. Background technique [0002] Wheel hubs in the prior art mainly adopt gravity casting and low-pressure casting; gravity casting is a process of injecting molten metal, especially molten aluminum, into the mold under the gravity of the earth; low-pressure casting refers to applying molten metal The process of injecting the air pressure or inert gas pressure 0.01-0.05MPa higher than the atmospheric pressure into the mold in the mold. At present, a kind of such as attached is popular in the European and American markets. figure 1 As shown in the hub, there is a long undercut on the back of the junction of the spoke and the rim near the platform of the valve hole. The hub is processed by gravity casting or low pressure casting. Gravity casting molds and low pressure ...

AI Technical Summary

Problems solved by technology

[0004] With gravity casting, sand molds or inserts need to be placed in the mold, and sand molds or inserts need to be placed manually for each product during the manufacturing process, and this method requires at least two workers to operate a casting machine, and the hub casting is completed Finally, it is necessary for the staff to knock off the sand molds or inserts. The number of sand molds or inserts required is large, and a large number of sand molds leads to high manufacturing costs. The structure of universally interchangeable inserts is complex and requires high shape and position accuracy. , the production cost is high; there are many quality points that need to be controlled in the production and processing process, resulting in low product qualification rate and production efficiency

[0005] With low-pressure casting, it is necessary to reserve a machining allowance as a whole, and then forcibly remove the excess material through machining. This method leads to serious waste of materials; due to the excessive thickness of the casting product, it is difficult to guarantee the castability of the product, and the pass rate of the product lower

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