What does suitable mill He Nixi have to distinguish? What actor drawback do each have?

Distinction: Milling cutter rotates the feed direction of the way that cuts work and workpiece is called instead go against mill; Milling cutter rotates the feed way of the way that cuts work and workpiece is same call suitable mill.

Actor defect:

Go against mill: Cutting ply from 0 arrive the biggest, cutting tool service life is low, already machined exterior quality difference, generation is perpendicular up milling component of force, have instigate the trend that workpiece destroys fixed position, dan Kexi takes crustaceous work, when orgnaization of nut of lever of workbench feed silk has space, workbench also won't change is moved;

Arrange mill: Cutting ply from the biggest to 0, cutting tool service life is tall, it is good to already machined exterior quality, generation is perpendicular the milling component of force that be down, conduce to the fixed position clamp of workpiece, but cannot the workpiece with mill crustaceous belt, when orgnaization of nut of lever of workbench feed silk has space, workbench may change is moved.

Divisional

1, suitable mill: The feed way of the direction of rotation of milling cutter and workpiece is same.

Arrange the limits of mill: Do not have when workpiece surface crustaceous, when orgnaization of machine tool feed does not have clearance, should choose suitable mill.

Advantage: The quality of spare parts surface is good, tooth wears away small.

Fit stuff: Alloy of heat-resisting of alloy of aluminum-magnesium alloy, titanium.

2, go against mill: The feed way of the direction of rotation of milling cutter and workpiece is opposite.

Go against the limits of mill: When workpiece surface crusty, when the feed orgnaization of the machine tool has space, choose more go against mill.

Advantage: Tooth is from already machined the surface to be cut, won't die knife; The clearance of orgnaization of machine tool feed won't cause vibration and crawl.

Means choice

The power of suitable mill is used up should compare when going against mill small, below coequal cutting condition, suitable mill power is used up should low 5% ～ 15% , arrange mill at the same time also more be helpful for discharging bits.

Answer to use treatment of suitable mill law as far as possible commonly, be machined in order to rise of spare parts surface bright and clean degree (reduce surface roughness) , assure dimension precision. But there is horniness layer on cutting face, indigestion surface of broken bits, workpiece is uneven more remarkable when, forging like treatment semifinished product, should use the method that go against mill.

When suitable mill, cutting by thick attenuate, tooth is cut from raw surface, advantageous to the use of milling cutter.

When going against mill, cannot cut metallic layer immediately after milling cutter tooth contacts workpiece, slide in workpiece surface one paragraph small is apart from however, in slip process, as a result of intense friction, can produce much quantity of heat, be in at the same time work surface is easy form sclerotic layer, reduced the durability of cutting tool, influence workpiece surface is bright and clean degree, bring to cutting adverse.

Additional, when going against mill, as a result of tooth by next upgrade (or by inside outside) cutting, and begin to be cut from exterior horniness layer, tooth gets very big concussion negative charge, milling cutter becomes blunt faster, but tooth is cut do not have slippage phenomenon into the process, the workbench when cutting won't change is moved.

Go against mill and suitable mill, because cut the cutting ply when workpiece to differ, the osculatory length of tooth and workpiece is different, so milling cutter wears away level is different, practice makes clear: When suitable mill, milling cutter durability is compared 2 ～ rise when going against mill 3 times, exterior surface roughness also can be reduced. Dan Shunxi is unfavorable cut the work with crustaceous belt with Yu Xi.