The cutting of layer of solder of gush of nickel radical alloy is machined

5mm, classics high temperature weighs figuration of the refrigeration after dissolve, hardness value achieves HRC55 ～ 60. 2382mm of roller overall length, f260mm of roller body diameter, grow 1900mm, surface roughness Ra1.

6µm, cylinder is spent 0.

1, its dimension public errand and form tolerancepublic errand requirement gives through cutting treatment assure. 2 cutting craft is analysed in the absense of the experience that machines layer of solder of gush of nickel radical alloy, first choice machines the method of hard steel of temper by dipping in water, turn cutting tool of silicon pottery and porcelain with compound nitrogen, thick car, half fine vehicle leaves surplus 0.

3mm, grinding of corundum emery wheel is chosen to amount to blueprint to ask on cylindrical grinder. But because taller Ni, Cr, B, Si is contained in material of gush solder layer,wait for alloying element, the organization after remelting is close, in 600 ～ condition of 800 ℃ high temperature falls to still have very tall hardness and strength, and big, plasticity differs brittleness, corundum emery wheel is particularly difficult to its cutting, grinding of class of a stage measures a diameter only 0.

02mm, and need to repair grind emery wheel more than 10 times, grinding of the first roller amounts to blueprint to ask to use up man-hour 40h, efficiency is low, cost is high. Look accordingly, traditional treatment method is unwell to the treatment of gush solder layer with. Classics analysis, the decision uses compound nitrogen to change rough machining of silicon cutting tool and semifinishing machining, change boron with cubic nitrogen (finish machining of CBN) cutting tool, the means that cancels emery wheel grinding undertakes cutting experiments. Compound nitrogen changes silicon cutting tool to have the physical character of low density, high strenth, tall hardness, value of room temperature hardness amounts to HRA92, have very good cutting ability and wearability, the hard steel of of all kinds temper by dipping in water that can process hardness to amount to HRC65 and sclerosis are cast-iron. Its bending strength is 700 ～ 900MPa, heatproof shake performance is good, rupture the cutting tool of pottery and porcelain of series of other of tenacity value excel, OK and intermittent the part semifinished product that processes high strenth. Cubic nitrogen changes boron (CBN) cutting tool has extremely tall hardness, wonderful wearability and better heatproof shake performance, it is treatment quenchs steel, cold hard the material of ideal cutting tool of alloy of cast-iron, high temperature. Rough machining of parameter of experiment of cutting of 3 cutting experiment and semifinishing machining choose compound nitrogen to turn silicon cutting tool, v=30m/min of speed of thick car cutting, v=60m/min of half fine vehicle, choose a machine tool to be lathe. Finish machining chooses cubic nitrogen to turn boracic cutting tool, v=90m/min, choose machine tool amount to to accuse lathe. Test result analyses compound nitrogen to change silicon cutting tool to wear away in the cutting tool when GV=60m/min serious, cannot finish half energy lathe operator to make, cutting speed can achieve 30 ～ 40m/min only, but it is better that its fight concussion tenacity, can undertake rough machining to not neat semifinished product. Cubic nitrogen changes boracic cutting tool to be when V=90m/min, cutting tool is slight wear away, can continue cutting, but after cutting tool wears away, as a result of roller height 1900mm, cutting time is long, the value increases surface roughness of half paragraphs of surface behind roller, cannot satisfy the requirement of blueprint. Affirmatory cutting parameter passes analysis of above test result, decide thick car chooses compound nitrogen to turn silicon cutting tool when not neat semifinished product, cutting speed V=35m/min, half fine vehicle and fine vehicle all choose cubic nitrogen to turn boracic cutting tool, v=60m/min of half fine vehicle, fine vehicle V=80m/min. Use via what pass for many times, the choice that proves dosage of machine tool, cutting tool, cutting is more reasonable, the dimension precision that changes boracic cutting tool to grind roller of treatment gush solder to be able to get ideal with car generation with cubic nitrogen, appearance precision, surface roughness stability is in Ra1.

6 ～ 0. 8µm less than, satisfy blueprint paper completely to ask. The use point that 4 cubic nitrogen turn boracic cutting tool changes boracic cutting tool to have brittleness as a result of cubic nitrogen big, plasticity is poor, oscillatory to percussive load is more sensitive, so in use should note the problem of the following respects. The machining complex with choice good tigidity by the machine tool -- workpiece -- cutting tool -- if the machining complex of top composition is rigid poor, vibration is big, will reduce cutting function and treatment efficiency substantially, cutting tool durability drops apparently. The machine tool that uses cubic nitrogen to turn boracic cutting tool so should have good tigidity, enough power and higher rotate speed. Medium-sized or general first selection is heavy-duty machine tool. Prevent workpiece to because gush solder roller is,use remelting of the high temperature after thermal spraying of alloyed powder end to form to the concussion of cutting tool, hard to avoid can appear a few hanging tumour, this will form concussion to cutting tool when cutting, cause collapse knife. So irregular to this kind semifinished product, readjust cutting dosage wants when cutting, reduce the cubic nitrogen with high price to turn the loss of boracic cutting tool. Dosage of logical choice cutting because 1900mm of height of roller of gush solder roller, external diameter F260mm, cutting time is as long as 190m/min. If midway changes a knife to jockey, receive knife difficulty, easy occurrence step, so dosage of right choice cutting is the key that makes sure cutting of gush solder roller machines figuration taking a knife. If cutting dosage has been chosen big, criterion cutting tool wears away aggravate, cannot walk along a knife to finish vehicle of roller body spirit 7 if cutting dosage has chosen small, criterion cutting time is long, cutting tool wears away time is long, easy cause machining complex to produce vibration, cannot cutting, will reduce manufacturing efficiency greatly. Turn precision work of boracic cutting tool with cubic nitrogen so when roller body, should choose lesser feed and as far as possible high cutting rate and appropriate cutting deepness, this will be helpful for making sure treatment quality is mixed improve manufacturing efficiency. 5 conclusion change boracic cutting tool to machine gush solder layer to be able to obtain satisfactory dimension precision and appearance precision with cubic nitrogen, want in use foundation only the tigidity of machining complex, the craft characteristic of workpiece, choose the cutting parameter of cutting tool reasonably, develop cubic nitrogen adequately to turn the advantage of boracic cutting tool, can achieve ideal result. CNC Milling