Introductive turbine has many large shafts kind, dish kind wait for component with cylinder body (wait like main shaft, rotor, impeller, clapboard, cylinder) need to undertake turning is machined, cent of turning working procedure is thick, half essence (fine car) with fine vehicle. The surplus when rough machining is large, lathe tool needs to bear very big cutting fights force, and the intensity that begs edge to be able to keep enough below puissant cutting circumstance even and cannot produce displacement, and the key that finish machining is spare parts treatment, the assurance that is treatment quality (precision, surface roughness, form the) such as tolerancepublic errand, so its space position cannot produce in use of edge of requirement cutting tool any change. Use formerly heavy-duty solder existence of hard alloy lathe tool wears type the hardness after bit solders drops, easy generation chap, blade is ground, auxiliary time grows installation lathe tool and economic integration cost is advanced malady. Accordingly but of dislocation lathe tool appeared to become one-time cutting tool revolution. At the same time a hard alloy but dislocation lathe tool, it should change on arbor only different capable person is qualitative, different of groovy form but dislocation razor blade, can process all sorts of data (steel, iron, nonferrous metal and metalloid) the working procedure that differs with treatment (thick, half essence and finish machining) and quality of life of cutting efficiency, cutting tool, treatment and economic integration benefit relatively solder hard alloy lathe tool has type very apparent rise. Structure of 1 cutting tool is analysed but structure of dislocation lathe tool is various, but measure (structure) good, bad standard basically should be clamp reliable, use go to the lavatory and cost is low. Domestic and international application is at present more but structure of dislocation lathe tool is lever type, this structure because the action of lever, the active force that can get horizontal way already in the razor blade when clamp (join forces) , bit a side (or two side) press closely in knife chamfer flank, again an active force is pressed to bit underside. Such razor blade can get stable and reliable clamp. But its defect is: Component form is complex, treatment difficulty is great, the Chang Yi that cut bits embeds 6 horn inside to decide bolt closely 6 spanner are caused to cannot be used normally inside aperture, and lever is being decided closely repeatedly, below loose circumstance easy rupture. The experiment of structures of all sorts of commonly used lathe tool, application mixes course and other comparative, proper motion development, developed a kind to agree with the polished rod that treatment of heavy-duty to large turbine spare parts turning uses is prejudicial type but dislocation lathe tool, its structure sketch map sees a picture 1. Graph 1 polished rod is prejudicial but characteristic of structure of 2 lathe tool and dependability analyse dislocation structure prejudicial type but dislocation lathe tool has two kinds of configuration to be whorl prejudicial, 2 for polished rod prejudicial. Polished rod is prejudicial type construction is at present we are recommended choose, what its have locking effect is prejudicial sell for polished rod cylinder prejudicial annul, of this selling and aperture of arbor locking fixed position cooperate to be clearance fit, accordingly, the operation rises to freely neatly, the tail end that sell aperture is taper hole, such polished rod are prejudicial annul can rotate only when the job (clamp, loose) and won't be in when loosening, prejudicial annul appear fall off the case that gives arbor. Rotate additionally prejudicial sell inside 6 aperture are in the lower end of peg, jam with respect to what can avoid to cut bits so. Prejudicial type but dislocation lathe tool can make his reliable clamp and use argument have 3: The logical choice of 1) offset pursues 2 offset choice is all in all, correct and reasonable offset chooses to should be finished through computation, if the graph is shown 2 times, of round prejudicial clamp lock up condition and orgnaization of inclined wedge clamp oneself identical, should satisfy following requirement: Amax ≤ Y1+Y2. AB is the job paragraph, included angle G takes 30 ° ～ normally 45 ° . Among them Amax is a circle prejudicial round of job paragraph litres of the biggest horn; Y1 is a circle prejudicial annulus with the angle of friction between workpiece; Y2 is the angle of friction that axis of round prejudicial cycle is in. Ap ≈ Amax, reason gets Tgap=tg(Y1+Y2) . The value of Ap promoting role is very little, can make Ap=2e/D, for safe for the purpose of, take no account of runner shaft place chafe and Tg(Y1)=f1, the relation of round eccentric throw when reason is locking up oneself is as follows: 2e/D ≤ F1 is become F1=0. 15 when, d/e ≥ 14. The D of eccentric shafe diameter that shows make choice of is F1Omn, eccentric throw E=0.
7mm. Criterion D/e=10/0.
7=14.
3, this value is satisfied completely from lock condition. Computation proves as a result, when offset size numerical value make choice of is inside the limits that locks up horn oneself, although cutting tool suffers concussion and vibration when cutting, bit still can be stabilized, safe clamp. 2) uses lathe tool of principle of cutting force clamp to be when cutting, because be opposite of workpiece cut mix greatly the action that the knife moves, the axial thrust Fx that horizontal way bears on bit, cut deep thrust Fy and advocate cutting force Fz, these 3 force can press bit closely on the underside of arbor knife chamfer, make cutting tool normal if the graph is shown 3 times,the join forces when its turning and component of force analyse cutting, this says commonly to use the principle of cutting force clamp. Graph the join forces when 3 turning and 3) of component of force are prejudicial annul rotate (locking) right choice of direction is used prejudicial annul rotate to be bit clamp when face of fixed position of arbor knife chamfer, must choose correct direction of rotation, correct whirl (locking) direction should be to make cutting force agrees with direction taking a knife. Right now, bit can get be tighteninged firmly deciding, its rotate sketch map is shown 4 times like the graph. Graph 4 prejudicial sell locking to rotate correctly 3 conclusion are in sketch map large to turbine part is heavy-duty in turning, adopt theoretical analysis and practice, pass Harbin turbine especially factory 20 old application, heavy-duty but dislocation lathe tool uses polished rod prejudicial type is feasible, its a lot of advantage already was confirmed, show Harbin turbine the factory already was the lathe tool formulate of this structure industry standard, popularize application in entire plant. CNC Milling
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