Special comb the design of form figuration knife

Lathe tool of figuration of 　 of structure of 2 cutting tool can divide it is a form (smooth style) with the circle two kinds: The life of circular figuration knife should compare a form (smooth style) figuration knife is long. Knife of this kind of figuration workmanship is complex, cost is high. For this we chose a form (smooth style) figuration knife, it is by piece of shape razor blade and arbor composition, arbor and razor blade are fission, the interchangeability of bit is good, arbor can repeat use. Bit treatment needs to machine fluctuation only face and hind horn, the horn before cutting tool is formed naturally when installation. Sex of cutting tool workmanship is good, periodic short, cost is low the biggest characteristic that is knife of this kind of figuration. DS/1006 combs form figuration knife is a structure of body smooth system (graph 2) . Cutting tool structure is the mode of machine clip knife. Edge is 10 dentiform comb shape structure. There still is side of a fixed position before 10 tine, it is to make sure the central line of the first tine arrives of end panel 1.

8mm. Can assure quality already so, use go to the lavatory again. The Ra0 of surface roughness of demand of fixed position area of arbor.

8µm, it is for cutting tool when installation, can adjust comb the axes line of the edge of form knife and workpiece is parallel, in order to assure workpiece the figure of 10 small chamfer is correct, deepness is consistent. Graph of cutting tool of figuration of G0 of the horn before angle of geometry of diagram of 2 cutting tool chooses before horn, to assure its appearance, often take lesser cost, but when processing aluminous material, can use again big before horn. Consider each respect element and the data of concerned data integratedly, of DS/1006 figuration lathe tool before horn chooses 8 ° . Edge everywhere the law is forward horn is unequal, the law is forward horn from 8 ° ～ 0 ° , from 0 ° ～ 8 ° . Hind the blade form of lathe tool of horny A0 figuration is complex, horn often takes lesser cost commonly after, treatment aluminous material is usable bigger hind horn. Consider each respect factor integratedly, those who decide figuration knife hind horn chooses A0=10 ° . Edge everywhere law backward horn also is unequal, law backward horn from 10 ° ～ 0 ° , from 0 ° ～ 10 ° . The computation of 2 cutting force is added what workpiece machines the surface to spread out length to be added what workpiece machines the surface to spread out length (graph 3) is foregone: Tine carries round horn R=0 on the head.

4mm, r=0.

2mm, tooth form horn is 40 ° , tine span is 2.

34mm. Use Δ ABC to beg go out to be in quadrangular AEOE ′ in F of ′ of O of quadrangular BF ′ a chamfer grows 10 chamfer for: 50.

The treatment that 1mm sees computation go out spreads out long for 50.

　 of computation of 1mm cutting force discusses about the data: "Aluminium alloy has good cutting performance, when cutting force compares cutting brass and steel small much, when cutting amount is same, the power that cutting tool place gets and specific power consumption also compare cutting brass and steel corresponding low many " . Pursue according to cutting force formula the CFz=490 in formula of Fz=CFzaxFzpfyFzvnFzkFz of size of 3 chamfer shape, XFz=1, YFz=1, NFz=0 regards as 50mm of ≥ of width of form turning cutting tool, feed F=0.

025 ～ 0.

When 055mm/r, take the place of feed to go up respectively type can get Fz=490 × 50.

111 × 0.

1 × of 0251 × KFz=614kFzFz=490 × 50.

111 × 0.

1 × of 0551 × the correction coefficient that KFz=1350kFzkFz is cutting force, by be machined the mechanical function of material, before the place decision such as radius of circular arc of horn, tool cutting edge angle, point of a knife. The experience formula of force of the cutting when processing rolled steel is: Fz=2000apfv, the experience formula of force of the cutting when treatment is cast-iron is: Fz=1000apfv. Its cutting force when processing rolled steel that is to say is 2000N left and right sides, its cutting force when treatment is cast-iron is 1000N left and right sides. With above data is compared, the cutting power that proves this figuration knife is feasible. Cutting tool of durability of 3 cutting tool from begin cutting to be achieved to wear extent rub the total cutting time till blunt standard, it is cutting tool durability surely, express with T. It does not include to measure, wait for blame cutting time to the knife. Mix in identical cutting dosage when grinding blunt standard, cutting tool durability is taller, state cutting tool wears away slower or performance of cutting tool cutting is well. The relation of cutting tool durability and cutting dosage can use the peaceful of augment to strap formula to express, turning speed V is in for the coefficient in type and index document 4 in check a watch to be able to be gotten. When material of vertical car of the circle outside be for form of duralumin, treatment when treatment material, cutting tool is high-speed steel, f ≤ 0.

20mm/r, Cv=388, Xv=0.

12, Yv=0.

25, M=0.

28, take the place of to go up VT0 gets after type.

28=363. Can get next lists according to above relation (set: Ap=50.

11mm, f=0.

20mm/r) . The corresponding relation of the durability when duralumin turning and cutting speed expresses vertical car of the circle outside V(m/min) of speed of durability T(min)5001000237240007915 cutting 63.

752.

541.

235.

629.

4 figuration turning 54.

244.

635.

030.

325.

The chooses penetration of a cutting tool to measure knife of Ap DS/1006 figuration penetration of a cutting tool of 04 cutting dosage measures be change, as the addition of deepness of penetration of a cutting tool penetration of a cutting tool is measured by small to big till 50.

11mm. The main factor that feed limits when feed F rough machining is cutting force, the main factor that feed limits when finish machining is exterior surface roughness. The penetration of a cutting tool when rough machining of DS/1006 figuration knife is measured by small greaten, to ensure cutting force is unapt too big, choose feed from 0.

20mm/r begins taper, when entering precision work all the time decrescent arrives 0.

02mm/r. Cutting speed V is after Ap and F make choice of on this foundation V of choice cutting speed. Cutting speed gets the limitation of cutting tool durability, the biggest cutting speed must be picked below the reasonable durability that assures cutting tool. In turning process, cooling fluid uses kerosene. The analysis that passes force of cutting of above cutting tool, durability plus old treatment experience, final cutting dosage is: In machining whole process, be machined early or late with speed of 2 kinds of cutting. Width of the penetration of a cutting tool when rough machining of cutting initial stage is not big, cutting speed uses 35m/min, feed relatively greatly 0.

20 ～ 0.

05mm/r, as the addition of cutting width, cutting force also adds gradually, reduce feed right now. When cutting width achieves 30mm to control commutation cutting speed is 25m/min, feed is taken 0.

05 ～ 0.

02mm/r, reduce gradually. The spare parts that machines through this kind of method achieves technical requirement completely, and manufacturing efficiency raises 10 times, reduced manufacturing cost. 5 conclusion are in cutting tool design, treatment quality, durability, cost depends on cutting tool material is chosen correct. DS/1006 combs the structure of form figuration knife uses structure of fission of machine clip type. Machine craft sex than circular figuration knife interchangeability is good, good. Parameter of cutting tool geometry: Before horn 8 ° , hind horn 10 ° , the horn after forward horn mixes the law is change. To get used to width of penetration of a cutting tool 50.

The specific requirement of 11mm, DS/1006 combs form figuration knife used metabolic feed, and the treatment process that the cutting speed of 2 kinds of inferior convertibility will come to complete a part. Below normal cutting dosage, its cutting force is 1000 ～ 2000N between, inside the range that permits normally in force of cutting tool cutting. Peaceful straps the serious consideration formula that formula is durability. According to the Taylor of augment DS/1006 of formula plan cipher out combs the durability of form figuration knife: When thick car (V=35m/min) is 2372min; When fine vehicle (V=25m/min) is 7915min. Want to choose cutting dosage correctly to just can assure the durability of cutting tool. According to the data calculate, the durability of this cutting tool can machine axle of door operator of about 1000 V30. DS/1006 combs form figuration knife ensures the treatment quality of axle of V30 door operator, make the much wedge belt-conveyor of door operator smooth, noise is low, transfer power big, service life is long. CNC Milling CNC Machining