A Two-Stage Squeeze Casting Process and Device for a Transmission Housing
A transmission housing and extrusion casting technology, which is applied in the casting field, can solve the problems of mutual leakage of oil passages, etc., and achieve the effects of improving the pass rate, saving production costs, and shortening the production cycle
Active Publication Date: 2020-09-11
XIANGYANG MEILIXIN SCI & TECH
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Problems solved by technology
[0003] Aiming at the deficiencies in the above-mentioned prior art, the present invention provides a two-stage extrusion casting process and device for the transmission housing, which adopts the two-stage extrusion process to solve the problem of mutual leakage of oil passages
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[0025] The present invention will be described in further detail below in conjunction with specific embodiments and accompanying drawings.
[0026] A two-stage squeeze casting process for a transmission housing, comprising the following steps:
[0027] S1. Spray release agent and punch oil in the upper and lower dies of the pressure die;
[0028] S2. Insert the moving core on the lower mold of the pressure mold, and close the mold;
[0029] S3. Insert a fixed core on the upper mold of the pressure mold, and place a cold aluminum insert on the fixed mold core;
[0030] S4, casting, and at the same time, the secondary oil cylinder drives the extrusion pin to insert the first section, and the stroke is H;
[0031] S5. Injection, stay time t1, the secondary oil cylinder drives the extrusion pin to insert the second section in the same direction as the first section insertion, the stroke is L, and the extrusion pin stop time is t2;
[0032] S6, open the mold, twitch the core, an...
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The invention discloses a secondary extrusion casting technology and device of a transmission shell. A secondary extrusion device is additionally arranged by mainly improving a die, and the two-time extrusion technology is adopted during casting so as to solve the problem of mutual leakage of oil ducts on the transmission shell. The secondary extrusion casting device of the transmission shell is characterized by comprising a pressure die lower die body and a left sliding block core, the pressure die lower die body and the left sliding block core form a cavity structure, the left sliding blockcore is provided with an extrusion pin with the lower end extending into the cavity structure, and the extrusion pin is connected with a two-stage driving device with two strokes in the same direction; the first stroke of the two-stage driving device is H1, and the second stroke of the two-stage driving device is L1. The device has the advantages that by means of the secondary extrusion structureand addition of a cold aluminum insert, the yield of products is improved, the infiltration technology is omitted, the production cost is reduced, and the production period is shortened.
Description
technical field [0001] The invention relates to the field of casting, in particular to a two-stage extrusion casting process and device for a transmission housing. Background technique [0002] In transmission housing casting, due to the complex overall structure and the dense area of high-pressure oil passages on the transmission housing, this area is usually used as a key control area during the casting process. Various preventive measures are taken at the beginning of mold design, such as This area is close to the near pouring side, the inner gate is set separately, the cooling is set, the inclined hole is added with pre-casting, and the end face of the hole is set with extrusion, etc., but the pass rate of the final product is still low, and several groups of oil passages are prone to mutual leakage. The product has added an impregnation process to improve the pass rate, but this greatly increases the production cost, and it is easy to cause color difference and poor a...
Claims
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IPC IPC(8): B22D17/22B22D17/20B22D15/00
CPCB22D15/00B22D17/2015B22D17/22
Inventor 危伟贾小东杨金金余悦都启东余凡张洁
Owner XIANGYANG MEILIXIN SCI & TECH