Milling machine is generally the processing of groove type workpiece, such as spline shaft spline, shaft keyway, gear teeth, etc., of course, you can also carry out the plane of the milling process, milling machine is generally small machine tools are also mainly horizontal, large-scale machine tools for the gantry type. Processing form is generally just the opposite of the lathe, the main movement for the tool rotary movement, workpiece movement for the feed movement.
What are the operating techniques for processing precision lathe parts using automatic lathes?
1, in order to ensure machining accuracy, roughing and finishing are best carried out separately. Because roughing, cutting volume, the workpiece is subject to cutting force, clamping force, heat generation, as well as processing the surface has a more significant work hardening phenomenon, there is a large internal stress within the workpiece, if the rough, roughing continuous, the precision of the parts after finishing will be redistributed because of the stress and quickly lost. For certain parts with high machining accuracy requirements. After roughing and before finishing, should also arrange low temperature annealing or aging treatment process to eliminate internal stress.
2, a reasonable choice of equipment. Rough machining is mainly cut off most of the machining allowance, and does not require a high degree of machining accuracy, so roughing should be in the power, precision is not too high on the machine tool, the finishing process is required to use a higher precision machine tool processing. Roughing and finishing are processed on different machine tools to give full play to the capacity of the equipment, but also to extend the service life of precision machine tools.
3, in the machining process route, often arranged for heat treatment processes. Heat treatment process location is arranged as follows: to improve the cutting performance of the metal, such as annealing, normalizing, tempering, etc., generally arranged before machining. To eliminate internal stresses, such as aging treatment, tempering treatment, etc., generally arranged after rough machining, before finishing. In order to improve the mechanical properties of parts, such as carburizing, quenching, tempering, etc., generally arranged after machining. If there is a large deformation after heat treatment, the final machining process must also be arranged.