Tungsten Carbide Milling Cutters' Milling Ways

Details: Category: Tungsten Information; Published on Wednesday, 29 October 2014 18:18

Tungsten carbide milling cutter has two main milling ways based on its feeding direction towards the work piece and its rotating direction:

I. Climb milling

During clime milling, the cutter rotating direction is the same as the feeding direction, and therefore when the cutting starts, the cutter soon bites the work piece and cut chip from it.

II. Up milling

During up milling, the cutter rotating direction is contrary to the feeding direction, so before the cutting starts, the cutter has to glide on the work piece with a zero cutting thickness at the beginning and a maximum thickness at the end.

During climb milling, the cutting force presses the work piece to the workbench while during up climb milling makes the work piece leave the work bench. Due to its good cutting effect, climb milling is usually more preferred than up milling. Only when there are thread backlash problem and other problems which can not be solved by climb milling, up milling is then in the consideration.

Whenever tungsten carbide milling cutters get into work, the cutting edges always have to suffer from impact load, the magnitude of which depends on the chip cross section, work piece materials and cutting types. Under ideal conditions, the cutter diameter should be larger than the work piece width and the cutter axial lead should always keep a distance from the work piece center line. When the cutter is placed right against the cutting center, burrs are easily produced. Also, the radial cutting force direction may change continuously when the cutting edge begins or stops cutting, which is possible to cause machine tool spindle vibration and damage. But when tungsten carbide milling cutter keep a small distance from the center, the cutting force direction will not change anymore and the cutter will gain a preliminary load.