Lever of automatic compensation boring cutter is homebred change reach its to improve

The pace enters electromotor 2.

Axial adjustment compensator 3.

Connecting rod 4.

Pull rod 5.

Bore hole spare parts 6.

Measure a head 7.

The measuring instrument is expressed 8.

Control appearance 9.

Boring cutter lever pursues 1 detect automatically principle of work of automatic compensation unit 1.

Boring cutter lever 2.

Pull rod 3.

Sealing ring 4.

Bolt 5.

Boring cutter 6.

Bit 7.

Prop up piece 8.

Dish form bedspring 9.

Prop up 10.

Workpiece pursues diagram of lever of 2 compensation boring cutter the working principle of this system is like 1 job principle the graph is shown 1 times. Boring cutter lever 9 after be over for treatment quit position. Should measure a values of 6 bore diameter error that will measure to deliver a measuring instrument to express 2 when, pressing with a finger shows intuitionisticly bore hole the public errand with located error takes the place, namely demonstrate is to be inside working limits of the system or already exceeded working range. Deliver measured value control appearance at the same time 8, by beforehand the program of set undertakes handling (undertake comparative) with mark fiducial value, should bore hole when the error exceeds the dominates end lower limit of set, output pulse signal to enter electromotor to the pace 1, the pace adjusts into the axial of pulse circumgyrate drive of electromotor compensator 2, pass axial shift connecting rod the pull rod inside aperture of center of lever of 3 mobile boring cutter 4, the cant of repass pull rod, make radial of point of a knife is extended, will bore hole the upper limit that dimension restores to dominate end to program set, finish loop of a compensation. Such loops continue, wear away to issue the signal that change a knife automatically to the biggest wear extent SDr of program set till point of a knife till, all boring hole assure during this dimension is controlled inside tolerancepublic errand limits. If pursue,2 hill spy dimension restrain construction of lever of compensation boring cutter 2 are shown, the main distinction that the refrigeration inside the belt compensates boring cutter lever and general boring arbor is to have two inside refrigeration deep aperture. Two when at the same time additionally treatment changes lever of this boring cutter to the coaxial on the section advocate sell aperture, lever of long and thin boring is belonged to in lever of congener boring cutter, install oriented bearing in front of boring cutter lever so, arbor letting boring extends bearing just begin to bore hole later, in order to make sure the job of boring cutter lever is rigid. For this, front of boring cutter lever directs the ministry has 3 paragraphs apart in all 6 in order to are set outfit is oriented the chamfer of bearing piece, every paragraphs of two chamfer radial is symmetrical, bearing piece has radial float momentum, by bearing of saucer form bedspring, still two stretch knives place groove. The others structure and general boring arbor are identical. The treatment of the deep aperture of F12H7 × 392mm that the crucial workmanship of lever of 3 boring cutter holds draw bar this aperture and compensation pull rod cooperate, its property is like pilot valve aperture and core of a powerful person cooperate, theoretic the least space is 0, ra0 of aperture surface roughness.

8µm. We use gun broach to machine on deep aperture drilling machine. The good point that the gun plunges is it is good to be gotten into linearity, treatment aperture size is exact, surface roughness value is lesser. But when function of deep aperture drilling machine drops, auger cut bore diameter precision to achieve a requirement hard. Right now, also can relax appropriately bore diameter public errand, deserve to use abrade stick abrade, the cylinder of aperture is spent and reduce exterior surface roughness in order to rise to be worth. Deserve to grind pull rod next, make of pull rod and aperture cooperate clearance close to Yu Ling, it is with can mobile freely accurate. The graph cools inside 3 accurate jig used 2-f4.

The treatment of deep aperture of 2 × 332mm is absent twice this axes line and the deep aperture with long older way is machined harder than afore-mentioned deep aperture, because the spare parts cannot rotate, get very easily slant, especially the hole wall of two alveolus leaves the circle outside boring cutter lever only 4.

4mm, when bore outside wearing lever of broken boring cutter very easily round and discard as useless. We use bit of common fried dough twist, by jig (graph 3) is oriented machine on radial drilling machine, increase by degrees with 5 length broach cent is gotten 5 paragraphs into. Erect outfit is in boring cutter lever on built up fixture, with V form fixed position, make sure its and rocker get coaxial of axes of main shaft circumgyrate. Parallel of axes of the circle outside assuring oriented Kongyu jig is when jig is made, oriented aperture is gotten with the center first on coordinate boring machine and lesser broach gets alveolus beforehand from two end by coordinate, make sure the coaxial of two upright alveolus is spent, use F4 next.

2 broach are received from drill through of one aspect of the matter on. Jig classics nitrogen changes processing to direct in order to assure the wearability of aperture. Drift the assembly of bearing piece directs according to float of boring cutter lever the character of service of bearing piece, when the final treatment of bearing piece circular arc is put in boring cutter lever to be assembled beforehand, undertake. Install bearing piece at this moment, want to fill up a ply to be equal to the space block of the height when status of work of group of dish form spring, bedspring of the form that it is dish leaves one height. 6 bearing piece install the circle outside going out at be being ground together with boring cutter lever inside groove beforehand, next debus needs boring cutter staff, dish form bedspring is connected after essence of life is ground load bearing piece chamfer again together inside. The attention controls the height of dish form bedspring, in order to make sure bearing piece enters oriented Kong Shi to dish form bedspring compress a quantity to reach its to control an amount beforehand, in order to produce enough bearing power, make bearing piece enters oriented Kong Shi again, do not send press dish form spring dead. The structural parameter of bedspring of standard dish form and force cannot satisfy the requirement of lever of this boring cutter commonly, what we use is to abstain dish form spring. The select material of boring cutter lever and heat treatment and lever of all and accurate boring cutter are same, lever of this boring cutter is obtain enough strength and wearability, choose nitrogen of ion of 38CrMoAl classics glow to change processing. Tone is made pledge processing changes processing to make good organization preparation for nitrogen before machining, have better machining performance again. Ageing treatment is made twice before nitrogen is changed in order to eliminate machining stress, when reducing nitrogen to change be out of shape, after making sure essence of boring cutter lever is ground, have change a layer with thicker nitrogen equably, make boring cutter lever has better precision endurance and longer service life. Graph because be changed to a section by car of treatment spare parts,the 4 structures that change draft of working procedure of section essence boring to lever of 4 boring cutter improve improved purpose advocate sell aperture two aperture length is abhorrent (graph 4) , short aperture grows 54mm, grow Kong Chang 80mm, two aperture length is compared achieve 1:1 approximately.

5, make on boring cutter lever two point of a knife wear away different situation, namely every time boring is over after aperture, wear extent of point of a knife is different, boring is over after a certain number of aperture, point of a knife total wear extent is different also. Lever of primary boring tool is synchronous to the compensation of two point of a knife and compensation is completely consistent, use automatic compensation to be able to create the difference on the short Kong Chao of partial part, long perhaps Kong Chao plays difference, force handlers to must use artificial compensation, and change every time when bit moves point of a knife, the radial of the point of a knife that makes boring grows the point of a knife of aperture to compare boring short aperture of purpose is extended more a few, namely point of a knife of boring short aperture presses a diameter + 0.

030mm moves a knife, point of a knife of boring long aperture presses a diameter + 0.

040mm moves a knife. And handlers is machined in transfer matic a certain quantity of short aperture should selective examination after the spare parts or grow hole size, when should discovering bore diameter is close to next difference, input compensation in time to control appearance artificially. Although can assure,bore hole so measure is acceptable, but bore diameter comes loose difference is big, cause pressure advocate the some when the lining that sell aperture is covered close with Kong Pei too loose, some cooperates too close and contractive quantity big, must increase to push opening working procedure together after transfer matic, namely too small to bore diameter hole is pushed again with push broach press lining next, very troublesome. Dynamic curve will circulate with job of point of a knife below to appearing this kind of blemish undertakes concrete analysis, the specification improves measure and result. The analysis has blemish to be recommended according to the applied manual of TWC system, it is to the adjustment of standard boring lever: The working limits on the radius of set point of a knife is W ≈ (the biggest radius that the R1 in R1-r2)/2 type, R2 is aperture respectively and the smallest radius. According to the dimension public errand of aperture, computation gets point of a knife to be W=8µm in the working limits on radius, compensate number every time, take Dr=6µm. Graph 5 wear away in order to grow point of a knife of earning of input of aperture measured value reach compensation if dynamic curve inputs information in order to grow the measured value of aperture as compensatory, because Kong Chang is abhorrent, the point of a knife on radius of the two aperture when getting boring hole wears away reach compensation trends curve (graph 5) , among them solid line is curve of trends of long aperture point of a knife, dotted line is curve of trends of short aperture point of a knife. Wear away as a result of short aperture point of a knife it is thus clear that slow, make short aperture will have a part to exceed on poor likelihood. Manage together, if regard compensatory as input information with the measured value of short aperture, because grow aperture point of a knife,wear away again fast and the part grows Kong Chao to leave poor possibility. If input information in order to grow the half of the measured value the sum of aperture and short aperture as compensatory, grow the likelihood the difference below Kong Chao partly from time to tome together, differ on short Kong Chao partly. because such, after be being counted to certain part when treatment, handlers must selective examination rapidly bore diameter dimension, avoid out of tolerance. Such point of a knife develop the total compensation when be less than a system to be used normally to count SDr far, shortened namely the service life of knife head. Improve measure to be this, we adjust horny A to undertake improvement to the cant of boring cutter lever. Well-known, when cutting dosage is changeless, of point of a knife wear away degree and cutting distance are concerned, cutting distance wears away greatly big also, point of a knife wears away normally the wear extent in level and cutting distance become direct ratio approximately. In same working class time, long aperture point of a knife wears away than short aperture point of a knife big, restore the upper limit of the working limits of set to make two point of a knife after be being compensated every time general, the requirement grows aperture point of a knife every time compensation is more pointed than short Kong Dao big, the longer than be equivalent to aperture of the compensation of the compensation that grows aperture namely and short aperture bores hole length LH and short aperture bore hole of length LS than. A, arbor adjusts horny Rj, A of compensation of a pulse, B, lever arm grows P, compensation screw pitch pursues if 6 compensation orgnaization pursues show 6 times, compensate orgnaization job principle according to TWC, the compensation of radius of point of a knife that every pulse produces compensator is Rj= P × the Rj in type of B of × of 1000 × A Tana 400 -- the compensation of point of a knife of a pulse, µma -- arbor adjusts role, (° ) P -- compensator screw pitch, mmA, B -- lever arm is long 400 -- the situation turns into electromotor 1 turn what needing knife of impulse of arteries and veins to place is standard component, a/B is calm value, p is constant, want to change point of a knife the compensation of a pulse changes tone to rectify horny A only. So, the scale relation that asks long aperture point of a knife adjusts horny AH and short aperture point of a knife to adjust horny AS is TanaH/tanaS=LH/LS set AS=3 80/54) ≈ of ° of ° criterion AH=arctan(tan 3 4.

5 ° pursue 7 earning point of a knife is inputted to wear away with growing aperture measured value after transforming reach compensation trends curve in particular program set, regard compensation as in order to grow aperture measured value information, wear away to take care of two point of a knife appropriately abhorrent, take W=10µm of limits of work of point of a knife, dr(of gross of compensation of long aperture every time is long) =8µ , the scale that adjusts horny A according to two point of a knife concerns, can push shortly aperture compensates number to be Dr=5µ every time, the point of a knife after improving wears away if pursue,reach compensation trends curve 7. Visible, after revising point of a knife to adjust horny A, of two point of a knife wear away to be able to carry steady state with compensation, make bore hole dimension achieved controlled status. The two point of a knife when improving the effect to move a knife can be moved into consistent, the operation is convenient; Although,two aperture point of a knife wears away abhorrent, but the same starting point when the two point of a knife after be being compensated every time return tone knife again, make bore hole dimension spends decrescent dispersedly; Appear no longer spare parts of out of tolerance, need not increase the working procedure that turn opening again; Realize the automatic compensation function of TWC system truly, make total compensation SDr is able to rise, tone knife can be machined more, improved the productivity of transfer matic; Service life of short aperture point of a knife still is wasted somewhat, this is the spare parts turns to a two aperture length to differ the exclusive inadequacy that stay. CNC Milling CNC Machining