Golden cylinder liner production technology

Abstract

The invention discloses a golden cylinder liner production technology. The technology is characterized by comprising the following steps that (1) resin sand is adopted as the raw materials, moulding sand used for casting is prepared according to a proportion, a model of a bumping moulding machine used for dry clay sand is adopted, a sand box is prepared according to requirements, the sand box is of a sealed structure, the molding cavity surface and the back surface of a sand mould are sealed by means of thermoplastic film and fireproof coating coated on the back surface of the thermoplastic film, then air in the sand is extracted out through a vacuum system, an internal and external pressure difference of the sand mould is formed, the moulding sand is solidified and formed, and a requiredcasting moulding cavity is formed; and (2) a mould is manufactured, specifically, a cylinder liner inner mould casting mould is manufactured according to the size and shape of a cylinder liner, and the inner mould casting mould is arranged inside the sand box. According to the golden cylinder liner production technology, the casting dimensional tolerance is quite small, the subsequent cold machining amount is small, and fusion-cast refractory near net shape casting is achieved.

Description

technical field [0001] The invention belongs to the technical field of casting, and in particular relates to a production process of a gold 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 ...

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