The machine tool host is the main body of the CNC machine tool. It includes machine parts such as bed, base, column, beam, sliding seat, worktable, spindle box, feeding mechanism, tool rest and automatic tool changer. It is a mechanical part that automatically completes various cutting processes on CNC machine tools. Compared with traditional machine tools, the main body of CNC machine tools has the following structural characteristics:
1) Adopt a new machine tool structure with high rigidity, high shock resistance and less thermal deformation. Usually, methods such as improving the static stiffness of the structural system, increasing the damping, and adjusting the quality and natural frequency of the structural parts are used to improve the stiffness and shock resistance of the machine tool host, so that the machine tool body can adapt to the needs of CNC machine tools for continuous and automatic cutting. Taking measures such as improving the structure and layout of the machine tool, reducing heat generation, controlling temperature rise, and adopting thermal displacement compensation can reduce the impact of thermal deformation on the machine tool host.
2) The high-performance spindle servo drive and feed servo drive device are widely used, which shortens the transmission chain of the CNC machine tool and simplifies the structure of the mechanical transmission system of the machine tool.
3) Adopt high transmission efficiency, high precision, no clearance transmission device and moving parts, such as ball screw nut pair, plastic sliding guide, linear rolling guide, static pressure guide, etc.
