There are many kinds of precision casting process, mainly including investment casting technology, metal mold casting technology, pressure mold casting technology, lost mold casting technology, etc., but the most commonly used is investment casting technology.Through the comparison analysis of the precision casting process the common welding process of the transmission bearing, the research analysis are carried out the aspects of cost production cycle.

1. Introduction of precision casting technology

Precision casting technology, also known as the lost wax casting technology, through the approach process to produce products are precision, the shape is very complex, parts of the final shape is almost equal, there are very few need to carry on the processing of can directly use the product, as a result, investment casting technology is an advanced technology of forming technology.As early as in the 1940s, investment casting technology has been widely used, such as copper lion products, copper products are produced by investment casting technology.At present, investment casting technology is applied in all walks of life, such as transportation industry, aerospace industry, energy industry, pharmaceutical industry, etc., the development speed is very fast.Through precision casting technology, only small castings but also large castings can be produced.

2. Application of precision casting technology in production

Welding transmission bearing, it is a transmission bearing structure, complex shape, the use of welding technology processing method produced, it first needs the parts processed, then assembled, with brazing welding in order to make it become a whole piece, the processing time is longer, the quality is guaranteed.Through the analysis of the entire structure of transmission bearing, choose what kind of material geometry size for design analysis, the final use of precision casting technology for processing is the optimal choice, the quality of the casting product is also very high, only need to a few important size selectivity for machining.Precision casting transmission bearing is a transmission bearing processed by precision casting process.

3. Make a comparative analysis of the manufacturing costs of the two technologies

Through the comparative analysis of the manufacturing costs of the two technologies, it can be seen that the cost of a single casting product is 1:1.4, the processing man-hour cost ratio is 1:2.7.The two methods in the processing cost of the biggest difference is: the cost of a single material, processing man-hour costs.Therefore, in the process of mass production, the processing cost of precision casting technology is much lower than that of machine welding technology due to the economies of scale.

4. The cycle of the two kinds of processing technology is compared analyzed

About the cycle of the machine welding transmission bearing, the bearing is assembled by four parts each other through brazing welding, the longest processing procedure of the parts is 11, some processes are very time consuming, labor cost, such as forging process, heat treatment process, EDM wire cutting process is very time consuming.Next, through the assembly processing process for processing, finally through the welding process to complete the manufacturing of the whole transmission support.Typically, a batch of 20 pieces of transmission bearings takes 6 to 7 months to produce.In precision casting technology, there are only 9 processing procedures for parts, which mainly include manufacturing of relevant models, mixing of materials, vacuum grouting, investment molding, casting in vacuum, crystallization under pressure, cleaning of casting parts revising relevant important dimensions.

5. Need to pay attention to the problem

In the actual mechanical processing production, the use of that processing technology method is restricted by many factors, such as the structural shape of parts, geometric size, the use of materials, the quality of the desired effect, cost time other factors.The practical application of precision casting technology is also affected by the above factors. Therefore, careful thinking measurement should be carried out before precision casting processing, so as to achieve twice the result with half the effort.