The method of pouring liquid metal into a casting cavity suitable for the shape of the part and cooling it to solidify to obtain the part or blank is called casting. Castings obtained by casting methods are called castings.
Casting structure design: to ensure 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 cabinet design must first consider the layout of the parts in the cabinet and the relationship with the external parts of the cabinet. For example, the shape and size of the cabinet should be determined by the lathe according to the requirements of two centers. In addition, the following issues should be considered:
⑴, meet the requirements of strength and rigidity. It is an important issue to meet the strength of the box parts that are subjected 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 components Work accuracy. Quick, easy and excellent automatic selection of castings is included.
⑵, heat dissipation performance and thermal deformation issues. The friction and heating of the parts in the box will change the viscosity of the lubricating oil and affect its lubricating performance; the temperature rise will cause thermal deformation of the box, especially the thermal deformation and thermal stress with uneven temperature distribution, which have a great impact on the accuracy and strength of the box. influences.
⑶. Reasonable structure design. Such as the arrangement of fulcrums, the arrangement of ribs, the position of openings and the design of the connection structure, etc., should all help improve the strength and rigidity of the box.
⑷, Good craftsmanship. Including the manufacturability of blank manufacturing, mechanical processing and heat treatment, assembly adjustment, installation and fixing, hoisting and transportation, maintenance and repair.
⑸, good shape, low quality.
