With the rapid development of science and technology, the change of market demand and the increasingly fierce competition of commodities, the turning cycle of mechanical products is getting shorter and shorter, and the proportion of multi-variety and small batch production is increasing. In order to meet the needs of this situation, a variety of new CNC lathes have appeared.
Why is the productivity of the same machine tool several times different? The conclusion is that the fixtures used for CNC lathes are not suitable, which greatly reduces the production efficiency of CNC lathes. How to improve the utilization rate of CNC lathe? Through technical analysis, the use of fixtures has a great relationship.
According to incomplete statistics, the proportion of unreasonable choice of fixtures for domestic CNC lathes is as high as more than 50%. By the end of 2010, the number of CNC lathes in China was nearly one million, that is to say, there were more than 500,000 CNC lathes due to unreasonable choice of fixtures or improper application. There are many articles on the selection and application of CNC lathes, because it contains considerable potential economic benefits.
In China’s machine tool industry, the size of the machine tool is different, the number of production is different, for small and medium-sized machine tools are generally mass production: large and heavy machine tools are single or small batch production. The workpiece conditions of general machine tools such as load bearing, impact and lubrication conditions are significantly better than those of automobiles, tractors and heavy machinery.
The parts are the support of the entire machine tool, and its accuracy retention requirements are very high, so Dongguan CNC lathes focus on telling you the characteristics of the heat treatment of machine tool parts, which can be summarized as follows:
- (1) Simple steel is generally used non-alloy (carbon) structural steel and alloy structural steel. A few parts, such as inlaid steel rails and hardened screws, use low alloy tool steel and bearing steel.
- (2) There are many local hardening and surface hardening parts. Many machine tool parts only require high wear resistance of the local surface. Except for a few parts that use a salt bath furnace for local hardening, most parts use local surface quenching methods (such as Induction heating, laser heating, super audio heating, etc.) hardening.
- (3) The non-oxidation heating of most parts of the periodic operation furnace adopts the salt bath furnace. Carry out in a vacuum furnace or in a gas carburizing furnace by dripping kerosene to generate a protective atmosphere.