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How to control the effect of hard milling?

443 Published by admin Jun 10,2019

The success of hard milling usually involves many factors. Let us follow the small series today to understand what factors are there so that everyone can have a clear processing idea when encountering hard cutting workpieces.

usually uses CBN solid tools, CBN cutters or ceramic tools to machine hardened workpieces, often referred to as hard cutting. The new process of hard cutting can be used to cut hardened steel, grey cast iron, ductile iron, powder metallurgy and special materials. Of course, some materials such as bronze are not suitable for hard cutting. With hard cutting technology, it can also be used for turning, surface machining, tapping, milling, slotting, profile machining, turning cones, etc. For steel materials with a hardness exceeding 56HRC or a strength exceeding Rm>2000N/mm2, we generally refer to it as hard cutting.

hard milling

The first important factor to consider for hard milling is the structure of your machine. Therefore, in order to achieve the desired hard milling effect, we first need a very strong machine with high damping capacity.

The sturdy granite processing table makes it a rigid hard milling machine.

Hard milling CNC machines require stiffness from granite processing beds or polymer concrete and cast steel structures.In general, machines constructed with polymer concrete have the cushioning capacity of many machines made of cast iron. At the same time, it is also important to have a CNC controller that can handle the dynamic requirements of constant and rapid acceleration and deceleration!

hard milling

The next thing to say is the clamping of the spindle and the tool. These are two very different things, but they are closely related in their use.

First you need a rigid rotor! If your spindle is beating, the best concentric handle in the world will only help you. In other words, combining high-speed spindles with the best tools can produce unexpected results.

The HSK series of shanks are one of the most popular shanks in hard milling because of their increased rigidity and concentricity with the spindle.

hard milling

CAD / CAM software is the last problem (not really, the puzzle is never missing). Programming software is one of the most important considerations for hard milling, which controls the load on the tool. You want the cutting tool to be loaded without impact, which means that the cycloidal milling is done sequentially or, as is often said, dynamic. The principle behind dynamic milling associated with hard milling is that your tool can easily and permanently bond materials. No sharp jumps, smooth power. Most major CAD/CAM software packages now have some form of dynamic milling.

hard milling

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