Application of Sand Casting in Engineering Machinery

Sand casting: A casting process in which molten liquid metal is formed in a sand mold. Steel, iron and most nonferrous alloy castings can be obtained by sand casting. Since the molding materials used in sand casting are cheap and easy to obtain, and the mold is easy to manufacture, it is suitable for single-piece production and small-batch production of castings. For a long time, sand casting has been the basic process in metal casting production.

Engineering machinery is a general term for construction machinery used in engineering construction. It is widely used in engineering fields such as construction, water conservancy, electricity, roads, mining, ports and national defense, etc.

Engineering machinery is an important part of the equipment industry. Generally speaking, all mechanical equipment required for earthwork construction, road construction and maintenance, mobile lifting and loading and unloading operations, and comprehensive mechanized construction required for various construction projects are called engineering machinery. It is mainly used in national defense construction projects, transportation construction, energy industry construction and production, agriculture, forestry and water conservancy construction, industrial and civil construction, urban construction, environmental protection and other fields.

In construction machinery, many core components have strict requirements on the use environment. In order to meet the requirements and satisfy the relevant technical conditions, they need to be produced by using sand casting technology.

Castings are widely used in construction machinery, mainly for the production of various structural parts, mechanism parts and functional parts. The following are several typical application scenarios:

1. Engine cylinder block, crankcase, cylinder head and other parts.

2. Track shoes, sprockets, drive gears and other parts in the walking system.

3. Shovel teeth, buckets, bucket teeth, rods and other parts in the excavation device.

4. Booms, wire rope pulleys, balance frames and other parts in lifting machinery.

The whole process of casting production includes mold making, sand mold making, furnace smelting, metal pouring, cooling and sand removal, and dimensional inspection. Among them, mold making is the primary link in casting production, and different parts require different molds. Sand mold making refers to filling a specific sand in a mold to form a sand mold with a specific shape. Furnace smelting refers to melting the metal into a liquid state to form molten iron or molten steel, and adding a certain amount of ferrite and steel agent. Metal pouring refers to pouring molten iron or molten steel into a mold, and forming a casting after solidification and cooling. Cooling and sand removal refers to cooling the casting to room temperature, removing the mold and sand, and then performing related treatments, such as deburring and grinding. Dimensional inspection refers to the inspection of the size, shape, weight, etc. of the casting.

The advantages of castings are that they can produce parts with complex internal and external shapes, flexible sizes, and economical and efficient. As an indispensable metal part in the field of engineering machinery, castings have been widely used. With the continuous advancement of technology and the application of new materials, casting technology is also constantly innovating. I believe that in the future, casting technology will become the key to continuous progress and optimization in the field of engineering machinery.