A method for vacuum suction casting casting
A vacuum suction casting and casting technology, which is applied in the casting field, can solve the problems of low production efficiency, difficulty in the process of casting castings, damage to the sealing of the crystallizer water cooling circulation system, etc., and achieve the effect of reducing the scrap rate and reducing the workload of repairs
Active Publication Date: 2015-08-05
西安钢研高纳航空部件有限公司
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Problems solved by technology
[0006] Usually, the casting out of the mold mainly relies on manual knocking on the crystallizer flange. Through the vibration generated by the knocking, the casting is released from the mold under the assistance of the casting's own gravity. The main disadvantage of this method is that the casting The molding process is difficult and the production efficiency is low
Manual knocking on the flange of the crystallizer repeatedly damages the sealing of the water cooling circulation system of the crystallizer, resulting in a high failure rate of the crystallizer
Method used
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Embodiment Construction
[0014] The present invention will be described in detail below in conjunction with the accompanying drawings.
[0015] Install a tee joint 1 on the vacuum pipeline on the crystallizer 2 of the original vacuum suction casting machine, one end of the tee joint 1 is connected to the crystallizer cavity 3, and the other two ends are connected to the vacuum container 5 through the vacuum switch 7 , and the other is connected to the compressed air source 4 through the compressed air control switch 6; the working pressure of the compressed air source 4 is 0.3-0.5MPa. Such as figure 2 shown.
[0016] How the invention works:
[0017] The working principle is shown as image 3 , Figure 4 shown. During the casting process, after the suction casting of the casting is completed, the vacuum switch is turned off, and the casting 8 first gradually solidifies under the cooling of the circulating water 9, and then shrinks slowly. The cooling effect of the circulating water on the casti...
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The invention belongs to the technical field of casting, and relates to a method for forming vacuum suction castings in vacuum suction casting for copper alloy or other alloy with the low melting point. The method includes that a tee coupling is mounted on a vacuum pipeline of a crystallizer of a vacuum suction casting machine, a first end of the tee coupling is connected with a cavity of the crystallizer, a second end of the tee coupling is connected with a vacuum container, and a third end of the tee coupling is connected with a compressed air source by a compressed air control switch; and suction casting is started, the vacuum container is close after the suction casting is completed, and the compressed air control switch is switched on to cool and pressurize a casting in the cavity of the crystallizer until the casting is completely separated from the crystallizer, and the pressure applied to the casting ranges from 0.3MPa to 0.5MPa. The method has the advantages that a vacuum system is modified, the compressed air with the pressure ranging from 0.3MPa to 0.5MPa is added for assisting in cooling and forming, and forming time for the casting is shortened to 1-2 minutes from the original 6-8 minutes after the vacuum system is modified; only one operator at the station is required instead of two operators in the original mode; and workload for repairing the crystallizer and rejection rate of the crystallizer are halved.
Description
technical field [0001] The invention belongs to the technical field of casting, and relates to a method for releasing castings in vacuum suction casting of copper alloys and other low-melting point alloys. Background technique [0002] Vacuum suction casting is a casting method that establishes a vacuum in the mold cavity through a vacuum system, presses molten metal into the cavity from bottom to top through a pressure difference, and solidifies and shapes it under the cooling of circulating water. The vacuum suction casting process is an effective way to solve the defects of bar pores, shrinkage cavities, shrinkage porosity and slag inclusion. [0003] Vacuum suction casting equipment is a vacuum suction casting machine, which is composed of main engine, vacuum device, cooling water system, crystallizer, control cabinet and other parts. The vacuum suction casting machine we use is mobile. [0004] The key part of the vacuum suction casting machine is the crystallizer, wh...
Claims
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IPC IPC(8): B22D18/06
Inventor 张文军周亚娜张文健
Owner 西安钢研高纳航空部件有限公司