What are the advantages and important manufacturing processes of machine tool castings

⑴ Good shock absorption performance.

⑵ Good process performance. Due to its high carbon content and eutectic composition, gray cast iron has a relatively low melting point, good flowability, and low shrinkage rate, making it suitable for casting complex or thin-walled castings. In addition, due to the tendency of graphite to form chips during cutting, the machinability of gray cast iron is superior to that of steel.

Advantages of using resin sand casting machine bed castings

Resin sand molds have good rigidity, which allows for the utilization of graphite expansion and shrinkage defects during the solidification process of cast iron, achieving less and no riser casting of gray cast iron and ductile iron parts.

In the production of solid casting, polystyrene foam is used for shaping with self hardening sand using epoxy resin. When the molten metal is poured into the mold, the foam plastic pattern will vaporize under the action of the high-temperature molten metal, burn and disappear, and the molten metal will replace the position occupied by the original foam plastic, and will be cooled and solidified into a full mold casting with the same shape as the pattern.

Relatively speaking, lost foam casting has great advantages over traditional sand molds for producing single or small batches of automotive coverings, machine tool beds, and other large molds. It not only saves expensive wood mold costs, but also is easy to operate, shortens production cycles, improves production efficiency, has small machining margins, and good surface quality.

Types of annealing for heat treatment: Common annealing processes include recrystallization annealing, stress relief annealing, spheroidization annealing, annealing, etc. The purpose of annealing is mainly to reduce the hardness of metal materials, improve plasticity, facilitate cutting or pressure processing, reduce residual stress, improve the uniformity of structure and composition, or prepare the structure for subsequent heat treatment.

Annealing and isothermal annealing

Annealing, also known as crystallization annealing, is commonly referred to as annealing. This type of annealing is mainly used for casting, forging, and hot-rolled profiles of various carbon and alloy steels with hypoeutectoid compositions, and sometimes also for welding structures. It is usually used as the final heat treatment for some non heavy parts, or as a pre heat treatment for certain workpieces.

spheroidizing annealing

Spheroidal annealing is mainly used for hypereutectoid carbon steel and alloy tool steel (such as steel grades used in the manufacture of cutting tools, measuring tools, and molds). Its main purpose is to reduce hardness, machinability, and prepare for quenching in the future.

stress relief annealing

Stress relief annealing, also known as low-temperature annealing (or high-temperature tempering), is mainly used for residual stresses in castings, forgings, welded parts, hot-rolled parts, cold drawn parts, etc. If these stresses are not applied, it will cause deformation or cracks in the steel after a certain period of time or during subsequent cutting processes.

Our main products include cast iron flat platforms, welding platforms, marking platforms, 3D flexible welding platforms, T-groove assembly platforms, boring and milling machine workbenches, bending plates, square boxes, shim plates, machine tool research and inspection tools, marble platforms, and various measuring tools.

Our company also undertakes solid and resin sand casting, including cushion boxes for steam turbine factories, bed bodies, columns, beams, workbenches, cast iron bases for mechanical equipment, etc. for machine tool factories. The product is manufactured reasonably, structurally stable, and has a long service life. The material used is gray iron HT200-300 ductile iron QT400-500, and the hardness of the cast iron platform/plate is HB170-240

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