Several problems should be considered when choosing CNC machine tools
When choosing CNC machine tools, the following aspects should generally be considered:
(1) The size of the main specifications of CNC machine tools should be compatible with the profile size of the workpiece. That is, small workpiece should choose small size of machine tool processing, and large workpiece is selected large size of machine tool processing, so as to achieve the reasonable use of equipment.
(2) The structure of the machine tool depends on the size of the machine tool, the weight of the workpiece and other factors.
(3) The working accuracy of the machine tool is compatible with the processing accuracy required by the process. Select machine tools according to the machining accuracy requirements of parts, such as rough machining process with low accuracy requirements, low precision machine tools should be selected, and high precision finishing process should be selected.
4) The power and stiffness of the machine tool as well as the range of maneuvering should be adapted to the nature of the process and the most appropriate cutting dosage. If the rough machining process to remove the blank allowance is large, the cutting allowance is selected large, it requires the machine tool to have large power and better stiffness.
(5) convenient clamping, simple fixture structure is also a factor to consider when choosing CNC equipment. Choose to use horizontal CNC machine tools, or choose vertical CNC machine tools, will directly affect the selection of fixture structure and processing coordinate system, directly related to the degree of nc programming and nc machining reliability.
It should be noted that in the selection of CNC machine tools should make full use of the function of CNC equipment, according to the needs of reasonable development, to expand the function of CNC machine tools, to meet the needs of the product. Then, according to the choice of CNC machine tools, further optimize the NUMERICAL control processing scheme and process route, according to the need to adjust the content of the process.
Choose processing machine tools, first of all to ensure the technical requirements of processing parts, to be able to process qualified parts. Secondly, it should be conducive to improving production efficiency and reducing production costs. The selection of machine tools generally takes into account the structure, load, power, stroke and accuracy of machine tools. Should also be based on processing parts of the material state, technical state requirements and process complexity, the selection of appropriate, economic CNC machine tools, comprehensive consideration of the following factors.
(1) The type of machine tools (turning, milling, machining center, etc.), specifications (range of travel), performance (processing materials).
(2) CNC machine tool spindle power, torque, speed range, tool and tool system configuration.
(3) the positioning accuracy and repeated positioning accuracy of CNC machine tools.
(4) Positioning datum and clamping method of parts.
(5) the linkage of machine tool coordinate system and coordinate axis.
(6) Tool parameter setting of the control system, including tool setting, tool compensation and ATC and other related functions of the machine tool.
