Casting appearance quality inspection of the key indicators is dimensional accuracy, surface roughness, and macro non-straightness. Since the 1980s, China
cnc machine industry production, large castings from the past clay dry sand gradually changed Resin Technology Hard sand process, thus casting appearance quality has been noticeably improved. However, because the majority of cnc machine casting enterprises have ISO9000 certification of the brand, but not the actual process control, the appearance of China's machine tool castings quality, and other industrial countries of products compared with a resin-sand should reach the level of Compared to the gap is still quite large, this is not should be. With resin-sand molding, it is seriously Chung sand on the casting quality assurance is essential. As for medium-sized machine tool castings are casting, the great majority of plant and equipment were not really the Taiwan earthquake, in particular, should seriously do a good job of supporting Chung is. In fact, we visited enterprises, in addition to Beijing a
cnc machine foundry and a few enterprises is seriously Chung, casting many other enterprises Modeling operations are to be further strengthened. Pouring in the process of casting cracking, casting surface Nien sand, sand washing, and other defects are very common, resulting in poor quality casting appearance, not only intensify the clean-up, finishing the workload, but also and foreign products than on a humbled. Dimensional accuracy is to achieve what grade, is under a lot to choose the testing data, we can spend Zouma, unsure. Macro-not-straightness (straightness) should have been a test items, but most companies are not able to provide test data, we hastily view, to achieve per metre length of the non-straightness of the few ≤ 1.5 mm. Surface roughness generally not be seized, but the foundry should be self-control. Because not be seized items, so we have to use the enterprises do not have a standard block-assessed and thus will not know how much the gap with others. For this quality indicators, most of the companies are ignored. While the quality of appearance yet to be improved, but our
cnc machine casting quality gap with other industrial countries is more important is the inherent quality.