With the development of domestic machine tool manufacturing companies, welding machine shot blasting machine has been developed in accordance with the time, which has been highly recognized by the society. There are many kinds of machine tools and various manufacturing processes. The application of welding machine bed shot blasting machine abroad is becoming more and more popular. The main problem here is the stability, technology and cost of the bed after shot blasting treatment.
Today, I will introduce to you. Maybe we know that the overall pig iron casting machine bed is made of HT250, HT300, cast steel, etc. It is relatively stable and has a long service life. The steel plate welding machine bed may not be very understood.
Whether cast or welded bed, there is a hot working process. In this case, there must be residual stress in the structure after cooling. Residual stresses can make the geometry of machine tools unstable, which is obviously not allowed in the machine tool industry. Residual stress can be eliminated after shot blasting machine treatment.
In the process, the casting machine body is often given a certain time after casting; The welded bed is treated with stress-relieving annealing to eliminate the threat of these residual stresses before it is processed into the bed product.
Casting bed stability is good, but the cost is high, long life, manufacturing process trouble: wood mold → sand mold → pouring → forming → to riser → heat treatment → natural aging (at least 3 years, more than 10 years)→ artificial aging → planing → pliers → high-frequency quenching → grinding → inspection
The welding bed is easy to manufacture, short cycle, easy to adjust the style, low cost, but easy to deform, the use of shot blasting process can greatly improve the service life of the welding bed. Manufacturing process: blanking (CNC flame or laser cutting)→ pre-processing (opening groove)→ welding (carbon dioxide gas protection welding)→ shot blasting machine treatment → planing → pliers → installation of composite guide rail → completion
Thus, welding lathe bed can manufacturing efficiency is one of the cast of thousands of points, due to the intervention of modern processing methods, this is very low, but the welding lathe bed can't replace all the casting lathe bed, both the casting bed body and welding bed body, as long as the shot blasting machine effectively eliminate stress processing, so is the same in terms of geometric stability.
From another point of view, generally to the stability of the high requirements of the bed, or for casting, this and the cost is relatively low, material stiffness (it is difficult to use in the process of external force and deformation) about. But the structure of some bed is more complex, it is difficult to use casting method production, so adopt welding method to solve.