Hydraulic coupling workpiece and production method

Abstract

The invention discloses a production method for fluid coupling turbines, pump pulleys and shells capable of preheating a mold and a bearing bush through a waste heat utilization device of a biomass aluminum melting furnace. The production method is characterized in that a full-metal mold centrifugal casting technology is adopted for manufacturing; the method includes the following five steps of aluminum melting, mold baking, mold feeding, casting and mold stripping; and the biomass aluminum melting furnace is used for melting aluminum in the first step, and waste heat of the biomass aluminum melting furnace is used for baking the mold in the second step. The production method has the beneficial effects of being efficient, capable of saving energy, low in carbon, environment-friendly, low in production cost and easy to operate and maintain.

Description

technical field [0001] The present invention relates to the production of hydraulic coupler workpieces, in particular to a production of hydraulic coupler workpieces and a production method using an all-metal mold centrifugal casting method, and in particular to a method for utilizing the waste heat of a biomass melting aluminum furnace A fluid coupling workpiece and a production method for preheating a mold and a bearing sleeve by means of a device. Background technique [0002] The production methods of hydraulic coupling workpieces such as turbines, pump wheels, casings and other aluminum parts generally include sand core casting, gravity casting and die casting. The main disadvantage of sand core casting is that the inner mold adopts sand core Casting has high requirements for sand molding and high technical requirements for molding workers; second, the sand core is easy to break, relying on sand core positioning and rapid pouring, the cast product is prone to center asy...

AI Technical Summary

Problems solved by technology

[0002] The production methods of hydraulic coupling workpieces such as turbines, pump wheels, casings and other aluminum parts generally include sand core casting, gravity casting and die casting. The main disadvantage of sand core casting is that the inner mold adopts sand core Casting has high requirements for sand molding and high technical requirements for molding workers; second, the sand core is easy to break, relying on sand core positioning and rapid pouring, the cast product is prone to center asymmetry, uneven blades, blade surface and inner surface, etc. The cavity is not smooth and other defects, which have great resistance to the oil flow circulation of the hydraulic coupling during use, and power loss; third, the surface finish of the product cast by the sand core is not high, the yield is low, and the area required for the molding is large, and the sand Most of them are discarded after casting, which is neither environmentally friendly nor economical

The main disadvantage of gravity casting is that the density of the produced workpieces cannot meet the requirements, and the pass rate can only reach about 40%

[0004] However, in the centrifugal casting of the all-metal mold, the metal mold must be preheated to 350°C to 600°C, and the bearing sleeve in the workpiece must also be preheated. When the casting temperature of aluminum water is around 800°C to 900°C, the yield high talent

At present, the main material of the workpiece of the hydraulic coupling is aluminum alloy. The existing melting methods of aluminum alloy mainly use electric furnace, gas furnace and ordinary coke oven. Although the furnace is fast and environmentally friendly, it can only be used as a melting furnace, and the centrifugal casting process in the all-metal mold takes a long time, and the aluminum water needs to be kept warm, which is costly, especially for small batch products.

At the same time, the metal mold must be used as an oven to heat the mold

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