Design requirements and overview of Dalian castings
The layout of the parts inside the box and the relationship with the external parts of the box shall be considered first in the design of the box. For example, the shape and size of the box shall be determined according to the height requirements of the two centers of the lathe. In addition, the following problems shall be considered:
(2) heat dissipation performance and thermal deformation. Friction and heating of parts in the box will change the viscosity of lubricating oil and affect its lubrication performance; The temperature rise causes the box to produce thermal deformation, especially the thermal deformation and thermal stress with uneven temperature distribution, which has a great impact on the accuracy and strength of the box.
(5) good shape and small quality.
(1) meet the strength and stiffness requirements. It is an important problem to meet the strength of box parts with great stress; But for most cases, the main index to evaluate the performance is stiffness, because the stiffness of the case not only affects the normal operation of the transmission parts, but also affects the working accuracy of the components. The automatic model selection of castings is included.
(4) good workmanship. Including the process of blank manufacturing, machining and heat treatment, assembly and adjustment, installation and fixation, hoisting and transportation, maintenance and repair, etc.
(3) reasonable structural design. For example, the arrangement of fulcrum, the arrangement of reinforcement, the location of opening and the design of connecting structure should be conducive to improving the strength and stiffness of the box.
The method of casting liquid metal into the casting cavity corresponding to the shape of the part and obtaining the part or blank after it is cooled and solidified is called casting. Castings obtained by casting are called castings.
Casting structure design: ensure its working performance and mechanical performance requirements, consider the requirements of casting process and alloy casting performance on casting structure, and whether the casting structure design is reasonable or not has a great impact on the quality, productivity and cost of castings.
