The develops a tendency dry type cutting that prospective metal cutting machines is machined

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  • source:DAHLER CNC Machining
One of development trends that treatment of dry type cutting is treatment of prospective metal cutting. In recent years industrial developed country takes dry type cutting seriously very much, to implement environmental policy, energetically research, development and implement method of this kind of new-style treatment. Cutting fluid had very good effect to dropping cutting temperature in the job, be helpful for breaking bits and platoon bits, but also put in a few problems at the same time, the use of cooling fluid, memory, Bao Jie and processing very trival, and cost is very high. The harm with cutting healthy to environment and handlers fluid makes its are used be restricted. The processing of cutting fluid also raised finished cost greatly, these charge often are underestimated, because they are included,be in overhead expenses. According to the statistic of American enterprise, in centering cooling fluid to process a system, the 14% ～ that cutting fluid holds totle drilling cost 16% , and cutting tool cost occupies 2% ～ only 4% . According to forecasting, if the cutting treatment of 20% uses treatment of dry type cutting, total production cost can be reduced 1.

6% . Accordingly, the direction that prospective cutting machines is to use the cutting liquid with little quantity, high temperature resistant cutting material and coating make dry treatment turns into in mechanical production domain likelihood. The mutual give attention to two or morethings between material of appearance of geometry of cutting tool of consideration of the need when the design of cutting tool of treatment of dry type cutting designs cutting tool of dry type cutting, cutting tool and coating, cannot undertake through choosing right cutting tool stuff type is machined working only, also cannot use coating method to make traditional cutting tool turns treatment doing type into cutting tool only. When traditional cutting is machined, all sorts of treatment means raised different requirement to cutting tool design. Dry type cutting machines cutting tool to must have following requirement: The cutting tool material of tall hear resistance, tall wearability; Cut the coefficient of friction between bits and cutting tool as far as possible small; Cutting tool appearance can make sure a bits is fluent, come loose easily hot; High intensity and concussion tenacity. The design of cutting tool of treatment of dry type cutting must consider the following 3 respects: (1) appearance of cutting tool geometry. Fuel factor is dry type cutting machines the main problem that need solves. When cutting tool is designed, the possibility that heat produces when wanting to consider to make just began cutting to machine is little, because this must assure force of cutting tool cutting attrition is small, small. It is very difficult that deep Kong Jia is versed in the cutting difficult problem of cutting tool is will cut bits eduction, because design of this cutting tool must assure the favorable result that discharge bits. The design principle below condition of small cutting strength is big before horn and horn of big circularity cutting. (2) cutting tool material. When dry type cutting is machined, the character with cutting tool the mainest material is high temperature resistant quality. If must be used big before horn, criterion the tall hardness of material is indispensible. The cutting tool material that applies to treatment of dry type cutting at present basically has exceed fine grained hard alloy, CBN, PCD, pottery and porcelain and cermet to wait. (3) cutting tool coating. One of main reasons that cutting treatment need not use cutting liquid are the application of cutting tool coating, it can arrive from cutting area through restraining the heat of bit is conducted will reduce temperature to pound. Accordingly, cutting tool data can come true through coating processing " solid is lubricant " , wear away in order to reduce attrition and felt, make cutting tool absorbs quantity of heat less, can bear higher cutting temperature. Coating machines medium function in dry type cutting is will cutting tool and be kept apart by cutting material, reduce attrition, have adiabatic effect. Dry type cutting machines cutting tool to be able to use TiAIN coating normally, it has very good heat-resisting function and high temperature capability, with TiN, tiCN coating photograph is compared, because added Al, make thereby of cutting tool fight oxidation function to get great improvement, special apply to high speed treatment and dry type treatment, its cutting function is in high temperature can rise than TiC coating when successive cutting fourfold. When the refrigeration that dry type cutting machines and treatment of lubricant cutting doing type if use sparge to cool, can avoid to use the negative effect when cutting fluid, this means cutting tool and workpiece not to need to cool for long, cut detached time is shorter between bits and cutting tool, and platoon bits appears more difficult. Solve these adverse elements to be able to pass cutting tool design and coating technology to remedy. But return sometimes insufficient, when necessary but right amount use refrigeration and lubricant medium. A few use refrigeration in cutting treatment or lubricant medium also call treatment of cutting of standard dry form. Actual application method includes to compress air or air cooling refrigeration, can use when turning - 20 ℃ air cooling reachs a few lube; Auger sparge can be used to lubricate when cutting etc. Treatment of dry type cutting is meant getting cut, cutting liquid need not be used in turning and boring process, thereby greatly managing finished cost and protective environment. Will tell commonly, the use that reduces cutting fluid can save 10% ～ the finished cost of 15% . Current, europe and Japan take the research that dry type cutting machines seriously very much. European industry group already realised the advantage that dry type cutting machines gradually, in big batch production, already had about 10% ～ the treatment of 15% used treatment of dry type cutting. CNC Milling CNC Machining