The high speed of hard steel of temper by dipping in water is machined

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With when establishing milling cutter cutting to process hard steel of temper by dipping in water, the addition of cutting deepness and every tine feed will cause cutting obstruction to be being shown increase, accordingly, in small cut deep and below the requirement that does not raise every tine feed, use high speed milling method of this kind of efficient treatment is very effective. But, as be machined of workpiece hardness rise, heat in metal cutting also is increasing, make cutting tool point is in high temperature condition. Such, because diffuse to wait for a reason with oxidation, aggravate cutting tool wear away. Accordingly, use at the cutting tool of hard steel of temper by dipping in water of high speed milling, the stability below high temperature appears very important. The article introduces the cutting example of hard steel of temper by dipping in water. The cutting of hard steel of temper by dipping in water uses besmear Fu to the hard alloy of heat-resisting film layer establishs milling cutter, coating of this kind of heat-resisting is had below high temperature be able to bear or endure goodly the character such as sex of caustic of oxidisability, wear-resisting. Additional, still used in domain of high speed treatment conspicuous CBN establishs milling cutter. Heat-resisting coating establishs milling cutter to machine example the high speed milling for hard steel of implementation temper by dipping in water, coating besides should have with cutting tool between beyond high combinative intensity, raise its hardness, hear resistance, fight oxidation function indispensable also. The heat-resisting coating that OSG company is being developed and investment uses (WX is super coating) oxidation begins temperature to raise 1300 ℃ considerably by the 800 ℃ in the past. Although be below the high temperature condition that place of hard steel of temper by dipping in water of high speed cutting obtains, of oxidation temperature rise to also can prevent coating damage effectively, because oxidize,prevent thereby, diffuse and bring about hard alloy matrix to wear away the aggravation of the state. And, compare with the coating photograph in the past, the hardness of this kind of coating also rises somewhat, the abrasive that can prevent coating oneself wears away. The introduction exceeds heat-resisting coating to establish milling cutter series to reach its to machine example below. Establish milling cutter with head of WX spy ball (WXS-EBD) treatment SKD11 (62HRC) workpiece (treatment condition is: Use cutting tool: Material of workpiece of 4; of WXS-EBD R1 × : SKD11 (62HRC) ; Rotate speed: 32000r/min; feed speed: 2800mm/min (0.

038mm/ ages) ; Cutting method: Treatment antrum; Cutting deepness: α A=0.

04mm, pf=0.

05mm; cooling means: Wind is cold; Machine a machine tool: Vertical machining center (HSK-E32) . By treatment the result is seen, compare with the coating photograph previously, of WXS-EBD wear away slower, can maintain ball head for long to establish the R appearance of milling cutter. Exceed much blade of heat-resisting square head to establish milling cutter with WX to SKD11 (60HRC) the example that undertakes flank milling machines (treatment condition: Use cutting tool: Material of workpiece of WXS-EMS Ф 10; : SKD11 (62HRC) ; Cutting speed: 150m/min (4800/min) ; Feed speed: 860mm/min (0.

03mm/ ages) ; Cutting method: Flank cutting, pattern is cut below; Cutting deepness: α A=10mm, α R=0.

5mm; cooling means: Wind is cold; Machine a machine tool: Vertical machining center (BT40) . Although used rate of 150m/min tall cutting, cutting tool wear out condition is stabler still, showed the result of heat-resisting coating. New coat (WX super coating) development is great the performance that improved hard alloy coating to establish hard steel of temper by dipping in water of milling cutter cutting. CBN establishs milling cutter to machine nitrogen of example cubic metre to change boron (CBN) hardness and hot conductivity are next to diamond, reaction of as simple as iron data is dinky, and have more excellent thermal stability and chemical stability than diamond. Accordingly, the iron that can be used at machining diamond hard a group of things with common features metal. CBN is not natural material, fall in condition of high temperature high pressure however, course and get together the process with brilliant same diamond is artificial complex. But, the adhesive sort that uses when synthesis and CBN chroma, but the mechanical function of great influence CBN and heat-resisting character. When NextpageCBN cutting tool just came out, main in order to machine cast-iron give priority to, its are used already gained ground gradually. Latter, as a result of CBN particle change imperceptibly, of bond improved, be opposite especially the improvement of cutting tool appearance, although be mixed to common carbon steel the cutting of hard steel of temper by dipping in water, also show very good result. Introductory CBN establishs the treatment example of hard steel of temper by dipping in water of milling cutter cutting below. Establish milling cutter to machine SKD11 of hard steel of temper by dipping in water with CBN (60HRC) the example of straight wall (treatment condition: Use cutting tool: ① CBN-CR-EDS φ 10 (2 tine) ② hard alloy coating establishs milling cutter φ 10 (6 tine) ; Workpiece material: SKD11 (60HRC) ; Cutting speed: ① 400m/min (12740/min) ; ② 20m/min (640/min) ; Feed speed: ① 1270mm/min (0.

05mm/ ages) ; ② 190mm/min (0.

05mm/ ages) ; Dangerous extend length: 50mm; cutting deepness: ① α R=0.

5mm (α A=5mm × 8) ; ② α A=40mm, α R=0.

01mm; bend gradient: 10 μ of ② of M; of ① 2~6 μ M above; Cooling means: Wind is cold; Machine a machine tool: Vertical machining center) . Use short blade to grow a neck to establish the straight wall with wide to 40mm milling cutter to undertake machining. The axial that is one pace with every 5mm is cut deep undertake high speed cutting, the bend gradient that machines a face achieves 6 μ M the following. After treatment establish milling cutter to wear away very small, can continue cutting. The CBN ball head that carries helix sword stands the treatment example of CBN-SXB of milling cutter series. Blade of helix of head of this kind of ball is helpful for forming thin cut bits and interrupted cutting result, use at head of hard alloy ball to establish milling cutter commonly. Although the cutting blade of CBN milling cutter special hard blade is ground, but OSG company still uses helix blade to serve as basic blade form, developed suit appearance of geometry of CBN cutting tool particularly (negative horn) ball head stands milling cutter, this kind of cutting tool already put in the market now. The double effect of good as a result of blade of this kind of helix and obdurability CBN special stuff, establish milling cutter photograph to compare with the CBN ball head in the past, CBN-SXB can be used bigger cut deep, even if when the complex form that changes in treatment cutting bear, also can realize stable cutting. Machine SKH51 with CBN-SXB (65HRC) the cutting example that metal pattern provides simple and easy model (treatment condition: Use cutting tool: Material of workpiece of 5; of CBN-SXB R1 × : SKH51 (65HRC) ; Main shaft rotate speed: 40000/min; feed speed: 6000mm/min (0.

075mm/t) ; Cutting deepness: α A=0.

03mm, pf=0.

05mm; cooling means: MQL; machines a machine tool: Vertical machining center) . Its take cutter track way is not linear means, process form of antrum giving a model in local and concave and convex place however. Workpiece machines the condition of the face to make clear, need not say to be in cutting is earlier, after although be in,knife length achieves 70m, cutting trace still agrees equably, held good cutting position. The meeting when the hard steel of temper by dipping in water of milling of relevant technology high speed of hard steel of temper by dipping in water of high speed treatment produces a large number of heat in metal cutting, actually major quantity of heat was passed cut bits. Accordingly, it is very important to will cut bits to keep clear of as soon as possible from cutting area and workpiece. But, if use the water-solubility cutting liquid that has cooling effect in great quantities to come,keep clear of cut bits, undertake heat acutenessly and cooling repeatedly inside short time, will bring about occurrence hot crack, shorten greatly cutting tool life, accordingly must bring to sb's attention. To avoid to appear this is planted problem, use effect of blowy and cooling means to be being shown, especially minim is lubricant (MQL) cutting is very good to improving result of treatment surface quality. MQL won't produce the quick cooling action that can cause hot crack, because minim oily agent is contained in cooling fluid, make lubricant function rises, conduce to cutting blade entering by treatment face, acquire good treatment quality thereby. From this, can improve treatment surface surface roughness not only, the ripple that still can improve treatment range is spent and verticality, more important is the stability that can maintain cutting tool life. Those who need bring to sb's attention is, the whirl of cutting tool is oscillatory make machine exterior quality aggravation not only, and can shorten cutting tool service life. It is especially when hard steel of cutting temper by dipping in water, little vibration causes blade of cutting tool collapse easily also. Accordingly, the clip of cutting tool and workpiece holds a method to become particularly important. The dynamic balancing performance of knife handle of shrinkage fitting type is good, clip holds precision tall, hold is big, can saying is very effective cutting tool clip supports a method. Above introduced the cutting example of hard steel of temper by dipping in water. Can say, the past can rely on grinding and the domain that discharge machines only, can be replaced completely already now with cutting treatment. CNC Milling