Cylinder sleeve casting technology

Abstract

The invention relates to a casting process of a cylinder liner. The process comprises the following steps: mixing sand, using resin sand as a raw material, and distributing molding sand for casting according to the proportion; making a mold, making a cylinder liner inner mold casting according to the size and shape of the cylinder liner Mold and outer mold casting mold, the inner mold casting mold is placed inside the outer mold casting mold, assembled to form a double-layer mold; melting, raw materials are configured according to a certain ratio, and the raw materials are heated in an electric furnace to Melting temperature, adding inoculants for smelting; pouring, pouring the molten iron obtained in step 3 into the inner sand mold of the double-layer mold described in step 2; cooling to normal temperature, opening the mold box, taking out the formed cylinder liner, and using a shot blasting machine Clean the surface of the cylinder liner and perform polishing treatment and surface strengthening treatment; it has the advantages of reasonable process, saving raw materials, cost saving, simple operation, stable work, high production efficiency, high product qualification rate and good molding quality.

Description

technical field [0001] The invention belongs to the technical field of casting, and in particular relates to a casting process of a cylinder liner. Background technique [0002] Casting is an ancient manufacturing method. With the development of industrial technology, the quality of cast large castings directly affects the quality of products. Therefore, casting occupies an important position in the machinery manufacturing industry. The current casting process generally includes molding, pouring , cooling and sand shakeout, the role of molding sand in foundry production is extremely important. Ordinary molding sand is mainly composed of raw sand, binder, water and coal powder, etc., which often cannot meet the requirements for molding sand mentioned above. , The casting waste caused by poor quality of molding sand accounts for about 30-50% of the total casting waste. The hardness of the finished casting is not enough. The engine is a common mechanical component. At present,...

AI Technical Summary

Problems solved by technology

[0002] Casting is an ancient manufacturing method. With the development of industrial technology, the quality of cast large castings directly affects the quality of products. Therefore, casting occupies an important position in the machinery manufacturing industry. The current casting process generally includes molding, pouring , cooling and sand shakeout, the role of molding sand in foundry production is extremely important. Ordinary molding sand is mainly composed of raw sand, binder, water and coal powder, etc., which often cannot meet the requirements for molding sand mentioned above. , The casting waste caused by poor quality of molding sand accounts for about 30-50% of the total casting waste. The hardness of the finished casting is not enough. The engine is a common mechanical component. At present, with the increasingly scarce energy and raw materials, the demand for the engine is developing in the direction of high power and small volume. The cylinder is the core part of the engine, and it is the space for gas compression, combustion and expansion. It is the trajectory guided by the piston movement, so it has high requirements on the mechanical properties of the cylinder liner. At the same time, due to the increasingly stringent environmental protection requirements, energy saving and emission reduction have become a key research topic in the engine industry. The traditional concept of cylinder liner materials and casting processes cannot meet new technologies. requirements, the metallographic structure and graphite form of the cylinder liner cannot meet the requirements, the cylinder liner has low strength, poor wear resistance, short service life, and poor processing performance. Therefore, the design of a process is reasonable, raw materials are saved, pouring is uniform, and the operation is simple. , Stable work, high production efficiency, high product qualification rate, and good molding quality The cylinder liner casting process is very necessary, and it plays an important role in improving the production efficiency and service life of the cylinder liner