Xiangyang Liqiang Machinery Co., Ltd.
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Alloy Steel Precision Casting
Alloy Steel Precision Casting

       Alloy steel precision casting must be processed after a series of castings, mainly for processing The most complex processes in the surface quality and overall shape of the product, including shot blasting, sand blasting, biting acid, pickling, rough grinding, fine Fine grinding, forming, welding repair, electrolytic polishing, grinding and other processes. In the processed process, there is no fixed process for the product, and the process is usually coordinated according to the product structure and the on-site work schedule. For example, during the cleaning process, shot peening, sand blasting and coarse grinding are not coordinated according to site conditions.

The surface quality requirements for precision casting of alloy steel are relatively high. Sandblasting treatment. The blasting is powered by compressed air and the sand is sprayed onto the surface of the casting at a high speed by a lance to remove residual sand and scale remaining in the outer surface and inner bore of the casting. There are clear requirements for the type, thickness and burst pressure of the sand used in sand blasting. Because pressure

       Too large may damage the surface of the product. During operation, care should be taken not to place the casting directly on the nozzle to prevent the casting from being sprayed. After blasting, the surface of the product is finer than the surface after blasting.

Rough grinding is to grind the inger with an abrasive cloth and grind it to The height of the casting surface is less than 1mm. Then it is finely ground. According to the products with different surface quality requirements, fine grinding with different thicknesses is used for fine grinding. Care must be taken during the fine grinding process to prevent surface wear on the product. From the inspection workshop to the welding workshop, there are defects in the surface of the product.

      Generally, product surface defects can be divided into two categories: convex and concave.

      Outstanding defects include: flash , burrs, steel beans or more obvious mold lines.

      The defect of the depression is: pores , shrinkage pits, cuts, wear, etc. Grinding and repair are the repair methods for two major defects on the surface.

      The main purpose of grinding is Use grinding tools such as pneumatic air guns and grinders, and install different types and types of grinding heads. Flatten and smooth the protruding defects on the surface of the product. When repairing protruding defects on the large surface of the product, choose a sanding head, which is faster. However, steel grinding heads are used to repair holes, grooves, grooves, etc., without passing through the sanding head. Since the steel grinding head is relatively thin, it is more convenient to repair those smaller places. Welding repair is a method of repairing dent defects such as stomata, shrinkage pits, cuts and wear.

      Forming of alloy steel precision casting The purpose of the repair is the same. It repairs different types of defects in different ways to qualify unqualified products. It is mainly used to correct shape deformation products. Generally, they are easily deformed by some products that are simple in shape and thin in thickness. For products with thick walls and complex structures, they are not easily deformed. For some foreseeable deformations, such as cooling tools and reasonable placement measures are typically used during the waxing process to prevent deformation rates and repair rates.



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