The method of pouring liquid metal into a casting cavity suitable for the shape of the part, and after the casting is cooled and solidified, to obtain the part or blank is called casting. Castings obtained by casting methods are called castings.
Casting structure design: ensuring its working performance and mechanical performance requirements, considering the requirements of casting process and alloy casting performance on the casting structure, whether the casting structure design is reasonable or not, has a great impact on the quality, productivity and cost of the casting.
The main design issues and design requirements
The box design must first consider the layout of the parts in the box and the relationship with the external parts of the box. For example, the shape and size of the box should be determined by the lathe according to the requirements of the two centers. In addition, the following issues should be considered:
- meet the requirements of strength and rigidity. It is an important issue to meet the strength of box parts that are subject to a lot of force; but for most boxes, the main index for evaluating performance is stiffness, because the stiffness of the box not only affects the normal operation of the transmission parts, but also affects the performance of the components. Work accuracy. Quick, easy and excellent automatic selection of castings is included.
- heat dissipation performance and thermal deformation issues. The friction and heating of the parts in the box change the viscosity of the lubricating oil, which affects its lubricating performance; the increase in temperature causes thermal deformation of the box, especially the thermal deformation and thermal stress with uneven temperature distribution, which has a great impact on the accuracy and strength of the box. influences.
- reasonable structure design. Such as the arrangement of fulcrums, the arrangement of the ribs, the position of the openings and the design of the connection structure, etc., should all help to improve the strength and rigidity of the box.
- good workmanship. Including the manufacturability of blank manufacturing, mechanical processing and heat treatment, assembly adjustment, installation and fixing, hoisting and transportation, maintenance and repair.
- good shape, low quality.