2. Workpiece processing size – first select according to the size of the workpiece to be processed. For example: the machining of small and medium-sized workpieces is based on complex contour milling tasks that can use smaller milling machines, whose work
The width of the worktable is less than 400mm, and the processing of large and complex parts requires a larger milling machine, and the width of the worktable is generally controlled at 500-600mm.
3. Workpiece machining accuracy requirements – choose a milling machine according to the accuracy requirements of the workpiece to be processed. At this stage, my country has formulated the accuracy standards for milling machines. Among them, there are professional standards for vertical lifting table milling machines. The standard stipulates that the linear motion coordinate positioning accuracy of the milling machine is 0.04/300mm, and the repeat positioning accuracy is 0.04/300mm. is 0.025mm, and the milling accuracy is 0.035mm. Therefore, from the perspective of workpiece accuracy, general milling machines can meet the processing needs of most parts, and for workpieces with high precision requirements, precision CNC milling machines should be fully selected.
4. Workpiece processing characteristics – Select the milling machine for the workpiece processing characteristics. For the processing parts that are frame-shaped planes and unequal height steps, use point-line milling machine equipment. In addition, according to the requirements of parts processing, on the basis of general milling machines, an indexing head and a rotary table can be added to process spiral grooves, blade parts, etc.
5. The characteristics of batch processing of workpieces – special milling machines are used for large-scale purchases. If it is a small batch and the rate is required, then it is very suitable to use a CNC milling machine. Because there are many workpiece fixtures reserved in the batch, programs, etc. can be stored for repeated use