Well-known, in metallic cutting process because cut,chafe, make cutting area produced high temperature, differ as a result of cutting tool and workpiece material at the same time, those who formed thermocouple is polar and generation is hot electromotive force, produced dc thermocurrent. Thermocurrent is easy the combustion process of surface of job of aggrandizement cutting tool, quickened cutting tool wear away. Below certain condition, in the osculatory area of workpiece and cutting tool and machine tool, machine tool, and the friction of machine tool itself deputy the contact between also can produce hot electromotive force in the area -- thermocurrent. Hot magnetism effect and electromagnetism effect still produce in cutting process, still can produce an electron to blast off in surface of area of high temperature contact -- discharge phenomenon. In last few years domestic and international brainpower considers to make clear, the thermocurrent that produces in cutting process and the thermocurrent that other element causes, these two thermocurrent are to pass a machine tool -- cutting tool -- workpiece -- machine tool system forms loop. Meanwhile still local thermocurrent is in cutting tool -- workpiece circulates inside finite osculatory area, accordingly, aggravate of cutting tool wear away. So, raise cutting tool cutting function and outside raising cutting tool durability to divide afore-mentioned basic approaches, still can use a kind of new approach -- make a fight with effect of thermocurrent of tatty of aggrandizement cutting tool namely, adopt namely cut off thermocurrent loop. The method that cuts off thermocurrent loop is very simple, although cutting tool and machine tool or workpiece and machine tool are isolated from, make thermocurrent cannot pass cutting area to cannot form loop, can reduce the endophilicity between the metal so, decreased to accumulate bits tumour and the generation that scale pricks, improved performance of cutting tool cutting thereby, improved cutting tool durability and treatment quality. How to cut off thermocurrent loop. To lathe work, on face of lathe tool fluctuation each use a bakelite to fill up knife plate or plastic mat knife plate, the square tool carrier that makes planar, flank and machine tool fall to go up on arbor is isolated from; To milling, planing, if use flat-nose pliers to hold clip work, glue board or rubber slab are filled up between gate and workpiece, make workpiece and flat-nose pliers are isolated from; To broach for He Lixi knife, can use broach of handle of high strenth model and model handle to establish milling cutter, make knife handle and aperture of machine tool main shaft are isolated from. Carry out a proof through production, cut off thermocurrent loop special it is high strenth, tall hardness, difficult to apply to treatment the treatment ability of cutting treatment material shows its result, can raise cutting tool durability normally 1 ～ 2 times. Accordingly, it is the method of a kind of of effective the the simplest, easiest implementation. CNC Milling
CNC Machining