Summary: Machine the problem of circumstance and existence in the light of black lead electrode, put forward to machine method of the whorl inside taper of black lead electrode and the special orgnaization that design for this on common lathe. This method has promotion application value. Black lead electrode is one of important running stores in process of electric stove steelmaking, larger proportion is had in producing cost. Aborning, it is electrode of a few black lead be together with taper whorl connection, after before one is used up, in back end again connection goes up, use continuously so. Black lead electrode is a kind of brittle product, carrying, inevitable meeting produces damage in hoisting, use process, take off buckle, break off phenomenon, cause electrode to cannot be used. And electrode price is high, undertake to the electrode of attaint recycle has important sense machining. Important is the treatment of the whorl inside taper in electrode treatment. Graph taper whorl is like the electrode of black lead of whorl of taper of electrode of concerned problem black lead that electrode of 1 black lead machines whorl of taper of electrode of 1 black lead the graph is shown 1 times, the D of diameter of black lead electrode that 301 electric stove use has Ø450mm and Ø350m two kinds, taper K is 1:3The electrode of two kinds of diameters has diameter of two kinds of pitch, taper hole and deepness to have change. The bed of problem general be open to traffic that machines existence on common lathe did not machine the function of taper whorl. Workpiece diameter slants big and length amounts to 1800mm, place inconvenience with groovy method outfit; Break electrode end panel uneven, chuck claw is too short, cannot place hold work. The attrition kind that size of diameter of the aperture inside central wearing and center wear the circle outside the claw that prop up and workpiece and electrode data are too weak wait for problem solution to rise definitely more troublesome. Have higher demand to lathe circumgyrate radius and lathe bed length. Screw bottom way is older, without broach of applicable fried dough twist. Solve measure to design can alone axial shift can be followed at the same time again procrastinate greatly board the special orgnaization that axial moves and generation radial moves, solve the treatment of taper, use lathe former some to take knife and treatment of treatment whorl function. Use workpiece to secure do not move (both neither rotates also not axial is mobile) method, solve workpiece to install clip and center to wear Kong Tai small the difficulty; that reachs the claw that prop up to chafe if lathe bed length is in not quite bed end direction adds one support, outfit of in order to places fixed workpiece. Design special cutting tool and broach. The special orgnaization that design of 2 special orgnaizations machines the whorl inside taper of black lead electrode on common lathe is shown 2 times like the graph, arbor 3 on the inclined chamfer that one agrees with workpiece rake uses the slip key seat that transfers power of roll coming back with, arbor drives main shaft to rotate and can slide inside main shaft aperture. Main shaft 7 drive 3 to procrastinate board reach lengthen canister 12, place knife piece one case 13 to rotate, current locking bolt 2 locking arbor 3 when, arbor 3 rotate only, do not make axial shift, main shaft 7 one side rotate, procrastinate greatly along with lathe at the same time board take a knife to bed end direction, right now arbor 3 inside main shaft aperture generation slides, arbor 3 those who go up is slip inclined chamfer is forced two-way procrastinate board 9 generation radial is mobile, two-way procrastinate board 9 drive fine tuning to procrastinate board 11, lengthen canister 12, place knife piece 13 reach cutting tool to make synchronous shift, realize taper thread machining thereby. Current locking bolt 2 loosen, hind locking bolt when 4 locking, arbor 3 transfer power of roll coming back and follow main shaft 7 make synchronous axial move, with respect to the treatment that can have end panel and columnar opening. Fine tuning procrastinates board 11 with will adjust control radial feed. 1. Headstock 2.
Before locking bolt 3.
Arbor 4 hind locking bolt 5.
Slip key box of 6 main shaft 7.
Main shaft 8.
Fixed procrastinate board 9.
Two-way procrastinate board 10.
Inclined chamfer is slip sell 11.
Fine tuning procrastinates board 12.
Lengthen canister 13 clip knife piece 14.
Electric board 15.
Secure frame 16.
Inclined chamfer 17.
Lathe delays board plan 3 orgnaizations installation and operation essentials tear open sketch map of 2 special orgnaizations procrastinate in next lathe a guide screw and nut, small procrastinate board, tool carrier and tailstock, install main shaft box at in procrastinate board on, axis of rotation of calibration orgnaization main shaft and coincide of axis of rotation of lathe main shaft, in securing, procrastinate turn the position, in making, procrastinate board do not wait for a reason because of cutting force, vibration and produce the position to move, avoid axis of rotation not coincide. Machine bolt of the locking before end panel and columnar aperture must be loosened, bolt of the locking after locking, treatment taper hole and whorl are contrary, before the pine after tightening. Lathe drives suitable car, take a knife to bed end direction, cutting tool is installed instead, machine the end panel of Ø450mm first, again bore comes after needing deepness, with 200mm long cutting tool machines the end panel inside aperture, with common slant instead knife treatment taper hole comes requirement measure, undertake thread machining finally. The circumstance of problem electrode treatment of circumstance of 4 electrode treatment and existence uses a precision to compare 1000mm of low old C620 × lathe, special orgnaization installation is in of lathe procrastinate greatly board on, according to in front narrates method undertakes machining. In treatment, special orgnaization is departmental cent action is accurate, credible, the operation is simple. Since November 1998, already batch treatment gives black lead electrode. Product classics examines, geometrical dimension accords with blueprint requirement. Via try out of electric stove smelt, did not discover discount an appearance, link is firm, completely OK and contented production asks. Special orgnaization still shakes perfect place two-way procrastinate board procrastinate with fine tuning board add size scale, control feed amount can more expediently than scale of lever of fine tuning silk, more intuitionisticly so. Two-way pull pulled swallow end area to increase lube chamfer. Lever of fine tuning silk and handwheel are improved further, those who have is not quite agile still. CNC Milling
CNC Machining