For most customers, there is a certain degree of knowledge about the purchase of milling machines. When ordering a milling machine, the equipment parameters, metric and inch system, power supply, voltage and frequency, as well as random accessories, and the color of the machine must be clearly specified. In view of the wide variety and different standards in the industry, for those who want to buy a milling machine, what issues should be paid attention to when purchasing a milling machine?
1. Mold type
There are many types of molds for milling machines, and the type of mold ordered must be clear.
2. Workpiece processing size
First select according to the size of the workpiece to be processed. For example: For small and medium-sized workpieces, complex contour milling tasks can use a smaller lifting table milling machine, and the width of the worktable is below 400mm. The processing of large-size and complex parts requires a larger gantry 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, our 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, the repeat positioning accuracy is 0.025mm, and the milling accuracy is 0.035mm. In addition, the factory precision of the milling machine has a certain reserve, which is about 20mm less than the tolerance value of the national standard. Therefore, from the perspective of the accuracy of the workpiece, the general milling machine can meet the processing needs of most parts. For workpieces with high precision requirements, high precision CNC milling machines should be fully selected.
4. Workpiece processing characteristics
Milling machine selection for workpiece processing characteristics. For processing parts that are frame-shaped planes and unequal height steps, use point-linear system milling equipment. In addition, according to the requirements of parts processing, an indexing head and a rotary table can be added to the general milling machine to process spiral grooves and blade parts.
5. The characteristics of batch processing of workpieces
For the needs of mass processing, special milling machines are used when purchasing.