As the ceaseless development of manufacturing industry, the application of the difficult treatment stuff that has tall hardness, tall wearability, tall hear resistance, tall chemical stability increasingly grow in quantity. To solve difficult treatment material spare parts machines the question with big difficulty of function difference, treatment, all sorts of new-style cutting tool (if cutting tool of hard alloy coating, diamond, pottery and porcelain, cubic nitrogen changes boron,wait exceed strong cutting tool) application is wide with each passing day. But these cutting tool are impulse withstand tenacity is poor, the price is high, because this applies to production not completely,the spot is used. We adopt academic research and old treatment practice, right existing cutting tool undertakes the factory the structure is optimized and be improved, decide parameter of reasonable cutting tool geometry, choose accurate treatment method, obtained idealer treatment result. Quench steel is mixed in order to machine now cold hard cast-iron when of cutting tool choose it is an introduction a bit experience. 1 treatment quenchs of the cutting tool when steel choose quench steel hardness is in commonly 45HRC above, the plasticity when treatment is out of shape poor, cutting resistance is great, cutting temperature is high. If hardness of cutting tool material is inferior, wear away difficulty of cutting tool cutting, easily (inside Kong Jia is versed in especially such) . When thick to quenching steel spare parts undertakes car is machined, because cutting quantity is big, oscillatory big, must choose appliance to have relatively the razor blade of high strenth and impact resistance. We choose YA6 and razor blade of YN05 hard alloy commonly. When be being machined to quenching steel spare parts has car of essence of life, taller to bit hardness, wearability and hear resistance requirement, we choose YT15 and razor blade of YT30 hard alloy normally. The tenacity of this kind of razor blade and bending strength are not high, grinding function and weldability can be poorer also, suit to be used at finish machining more. To increase strength of cutting tool point, we fall what cutting tool instead has the part before losing arris. Come loose for improvement hot sex, should choose lesser tool cutting edge angle (58 ° of 48 ° ～ ) . Machine the reasonable cutting dosage when to be: Cutting speed 30 ～ 45m/min, feed 0. 15 ～ 0.
3mm/r, cutting deepness 0.
4 ～ 1.
2mm. Lesser to quenching steel material undertakes a diameter (be like Ø20 ～ 30mm) inside Kong Jia man-hour, can choose YT10 and razor blade of YT30 hard alloy to make pull reamer, this kind of cutting tool can assure already inside the dimension precision of aperture, can obtain good treatment surface surface roughness again. 2 treatment are cold hard cast-iron when of cutting tool choose cold hard cast-iron hardness tall, brittleness is big, and dot of workpiece surface horniness and clip are arenaceous more, when cutting of hard alloy razor blade wear away easily and collapse blade. When undertaking to cold hard cast-iron work turning is machined, can choose wearability and impact resistance the hard alloy razor blade such as the YA6 with good, high bending strength and YD. To raise the intensity of edge and point of a knife and wearability, cutting tool can be used the larger part before losing and lesser hind horn, reduce appropriately tool cutting edge angle and deputy slant horn, increase role of point of a knife (150 ° ～ 160 ° ) , increase Xiu Guangren appropriately at the same time. Machine the reasonable cutting dosage when to be: Cutting speed 300 ～ 400m/min, feed 0.
6 ～ 1.
5mm/r, cutting deepness 0.
5 ～ 1mm. To the aperture inside cold hard cast-iron work (when undertaking machining like Ø20 ～ 50mm) , can choose YA6 or razor blade of YN10 hard alloy to make much blade reamer, first reaming leaves surplus, next again finish machining. The basis is reached by the aperture of the aperture inside treatment, surplus whether via can use reamer certainly or compound reamer machines: To inside the via with not large surplus of Kong Jia industry can use reamer to machine; Bigger to mental allowance via and step aperture, can use compound reamer treatment. CNC Milling
CNC Machining