Along with the time nearly step, China's economy is in the rapid
development, promote the Chinese industry, automobile industry
development, until as industrial and automotive main mechanical
parts casting also in this years rapid development, the
development of China's casting technology is not straight is not
very mature, but with the micro hole sealing technology
unceasing development, create perfect large casting products
will become possible, can completely solve the casting crack,
micro hole, sand holes, and other sealing problem.
Through the casting defect repair machine in casting repair
results of research, to determine a feasible in machine tool
castings to repair the new technology and process. Using the
casting defect repair machine to repair the defect of casting,
casting in the repair process, low temperature, deformation, no
crack generation, tinker point metal density, do not produce
hard point, without annealing phenomenon, can undertake any
mechanical processing.
Casting, casting shrinkage can be according to try the large
casting for correction. The same large casting, due to the
reason of the structure, the axial and radial or the length,
width and height of three direction shrinkage may not agree. For
more accurate size requirements of large casting, each direction
should give different shrinkage.
Casting after rusting is difficult to handle, and casting
profile easy to rust. If you don't pay attention, not only the
corrosion ability is bad, adornment sex is bad also. A lot of
enterprise in the large machine casting puts forward higher
corrosion resistance requirements at the same time, according to
the large machine casting different working conditions, the
requirement for large machine casting (cast iron, cast steel)
cold black, phosphating and other special antirust processing.
Affect nodular castings, grey iron castings, cast steel, cast
copper pieces as well as the quality of the casting of the
factors are many mainly have the following:
1, metal charging, refractory material, fuel, additive,
disintegration agent and casting sand, sand adhesive, paint, etc
of the quality of the material not scale, can make the casting
happen porosity, pore, slag inclusion, adhering sand casting
defects such as, affect the appearance quality and internal
quality, serious, makes the casting scrap, from the above seems
to be summed up as casting foundry raw material quality.
2, to formulate the reasonable process procedures, improve the
technical level of workers, make the procedure to get the right
implementation. From the above summary seems casting is a
process.
3, design, the influence factors on the quality of the casting
machine many. In addition to according to the working conditions
and metal material performance to determine machine casting
geometric shape, size outside, still must from casting alloy and
casting process characteristic point of view to consider the
rationality of the design, i.e., the apparent size effect and
solidification and shrinkage, stress, in order to prevent or
reduce copper casting composition segregation, deformation,
cracking and other defects occur. From the above summary seems
machine casting to have good design manufacturability.
4, according to the casting structure, the weight and size,
casting alloy characteristics and production conditions, choose
appropriate parting surface and modelling, core making method,
setting up reasonable casting steel, cold iron, riser and gating
system, etc. To ensure that you get high quality casting, the
above description casting has reasonable casting process.
HOME PAGE | CASTING BLOG | CONTACT US |