The Composition System and Structure Characteristics of CMM in Precision Parts Processing
In the field of precision parts processing, CMM is composed of mainframe, measuring head and electrical system. The mainframe includes frame structure, ruler system, guide rail, driving device, balancing device and turntable accessories; The electrical system includes electrical control system, computer hardware, measurement and software, printing and drawing devices, etc. Therefore, the use of CMM requires familiarity with the basic components of the equipment and basic skills to conduct measurement operations.
The structure of CMM can be divided into mobile bridge type, fixed bridge type, gantry type, cantilever type, horizontal arm type, column type, horizontal boring type and instrument table type. When using, pay attention to the structural characteristics and application scope of the instruments used. For example, the mobile bridge type is the most widely used structural form in CMM at present, which has simple, compact structure, good stiffness and relatively open space.
The workpiece is installed on a fixed worktable with strong bearing capacity, and the workpiece quality has no influence on the dynamic performance of the measuring machine. In the field of precision parts processing, small and medium-sized CMMs often use this form.