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Milling is a kind of cutting method that takes the rotary motion of the milling cutter as the main motion and the milling cutter or workpiece as the feed motion.
Because of the above characteristics, milling is especially suitable for the processing of complex-shaped composite parts such as molds and plays a very important role in mold manufacturing and other industries. With the rapid development of numerical control technology, milling plays a more and more important role in machining, especially in the machining of various-shaped surfaces, which has incomparable advantages over other machining methods. At present, the five-axis NC milling machining center can even complete the reproduction and processing of the whole artwork efficiently and continuously.
In the actual production of milling, including machine tool setting, workpiece clamping, tool selection, and other application skills, we briefly summarize 17 key points of milling.
Check the power capacity and rigidity of the machine tool to ensure that the machine tool can use the required milling cutter diameter.
Workpiece clamping conditions and considerations.
When machining, make the tool overhang on the spindle as short as possible.
When milling narrow workpieces or with gaps, ensure that there are enough knives to eat.
Use the correct milling cutter pitch suitable for the process to ensure that there are not too many blades involved in cutting, otherwise, it will cause vibration.
As far as possible, use the indexable blade with a positive front corner groove to ensure a smooth cutting effect and minimum power consumption.
By using the recommended maximum chip thickness, ensure the correct feed of the blade is used to achieve the correct cutting effect.
Use forward milling as much as possible.
The material and configuration of the workpiece, as well as the quality requirements of the surface to be machined.
The groove type and material are selected according to the material type and application type of the workpiece.
For longer overhangs that exceed 4 times the tool diameter, the vibration trend will become more obvious, and the use of vibration-reducing tools can significantly improve productivity.
Select the most appropriate main deflection angle.
Select the correct diameter according to the width of the workpiece.
Position the milling cutter correctly.
It can be seen that through the arc cutting, the chip thickness at the time of tool withdrawal is always zero so that higher feed and longer tool life can be achieved.
Use coolant only when deemed necessary. In general, milling can be better performed when coolant is not used.
Follow tool maintenance recommendations and monitor tool wear.
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