In-situ centrifugal casting device and centrifugal casting method for thin-wall alloy castings with circular ring sections

Abstract

The invention provides an in-situ centrifugal casting device and a centrifugal casting method for thin-wall alloy castings with circular ring sections, and relates to the centrifugal casting device and the centrifugal casting method for the alloy castings. The centrifugal casting device and the centrifugal casting method aim at optimizing tedious processes of traditional centrifugal casting, eliminating potential safety hazards during melt transferring and pouring, reducing defects such as casting cold shut, inclusion and pores, avoiding waste of alloys in pouring gates, improving the production efficiency and reducing cost. In the in-situ centrifugal casting device, alloy raw materials are loaded in a graphite heater fixed to a bottom plate, a heat preservation barrel is placed outside the heater, an induction heating coil is arranged outside the heat preservation barrel, a casting mold is arranged on the tops of the heater and the heat preservation barrel, a limiting guide column isfixed to the circle center position of the bottom plate, and by twisting an axial limiting nut, an upper pressing plate can be moved downwards to press all parts, between the upper pressing plate andthe bottom plate, together with the bottom plate. According to the in-situ centrifugal casting method, the alloy raw materials are molten in the centrifugal device, a mold cavity of the casting mold is full filled with the alloy raw materials under the effect of centrifugal force, the alloy raw materials are solidified and formed, and coupling of in-situ smelting and in-situ centrifugation is achieved.

Description

technical field [0001] The invention relates to centrifugal casting equipment and a centrifugal casting method for alloy castings. Background technique [0002] At present, for the forming of thin-walled cylindrical alloy castings, centrifugal casting technology is usually used because it has the characteristics of fast filling speed of molten metal and high feeding pressure. [0003] However, the traditional centrifugal casting process needs to be completed step by step through separate smelting equipment and centrifugal casting equipment. Generally speaking, it needs to be smelted in the smelting equipment, and then poured by transferring the melt to the centrifugal casting equipment. This process not only increases the cumbersomeness of the process, but also poses safety hazards to users during the transfer of the melt and the pouring process; at the same time, if the transfer of the melt takes a long time, there will be direct contact between the high-temperature melt an...

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Problems solved by technology

[0003] However, the traditional centrifugal casting process needs to be completed step by step through separate smelting equipment and centrifugal casting equipment. Generally speaking, it needs to be smelted in the smelting equipment, and then poured by transferring the melt to the centrifugal casting equipment. This process not only increases the cumbersomeness of the process, but also poses safety hazards to users during the transfer of the melt and the pouring process; at the same time, if the transfer of the melt takes a long time, there will be direct contact between the high-temperature melt and the air for a long time. A large amount of gas enters and partially oxidizes; in addition, due to the instability of the pouring speed during the pouring process, it is easy to produce cold shut and air entrainment; secondly, because the smelting equipment is separated, the possibility of inclusions in the alloy is also greatly increased Not only that, because this pouring process also needs to increase the corresponding sprue, which will bring more material waste in the sprue, resulting in low material utilization, and further machining is required after forming, increasing Big cost

[0004] In summary, in view of the potential safety hazards in the melt transfer and pouring process in traditional centrifugal casting, as well as the problems of cold shut, inclusions, pores and high cost, it is necessary to propose a new centrifugal casting equipment and method to improve Centrifugal casting process eliminates potential safety hazards to the human body during transfer of melt and pouring process to prevent the occurrence of these alloy defects, increase material utilization, reduce production costs, and improve production efficiency

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