Large machine tool casting cleaning, bed casting cleaning is the essence of the maintenance of the casting, the purpose of cleaning is to make the casting surface quality can be improved.
Casting melting and pouring iron quality on the surface quality of castings is mainly reflected in two aspects, one is the content of impurities in the water, especially the content of iron oxide, which is very easy to produce slag or slag pores on the surface of the casting; the second is the gas content in the iron, high gas content is easy to make the casting in the surface or subcutaneous pores. The main measures we take are to increase the temperature of the iron, establish a perfect cupola detection system, and ensure that the cupola is in normal condition.
"High temperature resting, low temperature pouring" is the control guideline of pouring, in order to reduce the casting porosity, shrinkage and surface sand defects. Improve the level of casting technology, improve the export of machine tool castings surface quality
Reasonably determine the parting surface as much as possible to reduce the parting surface to reduce the formation of the parting surface of the flying edge, surface bump and other casting surface defects; improve the integrity of the core, reduce the number of joints between the core, reduce the gap between the core or core and type, in order to improve the surface convexity and clarity of the contour of large castings.
The selection of process parameters has a great influence on the dimensional accuracy and contour clarity of the casting. After many process tests, each process parameter is carefully selected.
Extensive application of the latest casting process results to improve the level of casting technology to reduce casting defects, especially casting surface defects.