Large length-diameter flow channel mechanism of 4AT automatic-transmission gear box

Abstract

The invention relates to a large length-diameter flow channel mechanism of a 4AT automatic-transmission gear box. The flow channel mechanism comprises a flow channel material cake, main flow channels and a branch flow channel, the flow channel material cake is arranged in the middle of one side of a casting of a box and is connected with one side of the casting of the box through the two forked main flow channels, one end of one main flow channel is connected with one end of the branch flow channel, the branch flow channel extends to the other side of the casting of the box along the outside of the casting of the box, the side, close to the casting of the box, of the branch flow channel is connected with the casting of the box through multiple small flow channels. The length diameter of the flow channel mechanism is large, an aluminum material enters a cavity of a die casting die from a difficult forming point of the casting, aluminum passing through a fine core of a die is reduced, a thermal center problem is effectively solved and quality and volume production are guaranteed.

Description

technical field [0001] The invention relates to the field of die-casting molds, in particular to a flow channel mechanism with a large length-to-diameter ratio for a 4AT automatic gearbox. Background technique [0002] At present, the pouring system of die-casting molds for automobile automatic gearbox body generally only feeds from the valve plate where the part is closer to the material cake. Referring to foreign technology, since the filling of the casting is fed from the closer to the material cake, The casting product itself has a complex structure and a large volume, with a product weight of 12.7Kg, plus 21Kg for pouring. When filling, it is easy for the aluminum material to arrive inconsistently, and it is easy to seal the edge, and the air cannot be removed, and a large number of air shrinkage holes and even cracks will occur in important parts. The quality of castings cannot be guaranteed, resulting in a large number of product defects, and the die-casting scrap ra...

AI Technical Summary

Problems solved by technology

[0002] At present, the pouring system of die-casting molds for automobile automatic gearbox body generally only feeds from the valve plate where the part is closer to the material cake. Referring to foreign technology, since the filling of the casting is fed from the closer to the material cake, The casting product itself has a complex structure and a large volume, with a product weight of 12.7Kg, plus 21Kg for pouring.

When filling, it is easy for the aluminum material to arrive inconsistently, it is easy to seal the edge, the air cannot be excluded, and a large number of air shrinkage holes or even cracks are generated in important parts

The quality of castings cannot be guaranteed, resulting in a large number of product defects, and the die-casting scrap rate is extremely high. For a long time, because of die-casting problems, there have been a lot of problems that cannot make new cars go on the market

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