CA2352426A1 - Method and device for grinding workpieces with centers which comprise form variations - Google Patents
Method and device for grinding workpieces with centers which comprise form variations Download PDFInfo
- Publication number
- CA2352426A1 CA2352426A1 CA002352426A CA2352426A CA2352426A1 CA 2352426 A1 CA2352426 A1 CA 2352426A1 CA 002352426 A CA002352426 A CA 002352426A CA 2352426 A CA2352426 A CA 2352426A CA 2352426 A1 CA2352426 A1 CA 2352426A1
- Authority
- CA
- Canada
- Prior art keywords
- workpiece
- center
- tailstock
- quill
- locating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B23/00—Tailstocks; Centres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
- B24B41/061—Work supports, e.g. adjustable steadies axially supporting turning workpieces, e.g. magnetically, pneumatically
- B24B41/062—Work supports, e.g. adjustable steadies axially supporting turning workpieces, e.g. magnetically, pneumatically between centres; Dogs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
- B24B41/065—Steady rests
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/02—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work
- B24B5/04—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding cylindrical surfaces externally
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
- Turning (AREA)
Abstract
The invention relates to a method for machining workpieces with areas which comprise form variations, whereby the workpiece (5) is fixed between the tip (13) of the tool spindle (30) of the workpiece spindle head (1) and the tip (6) of the sleeve (13) of the tailstock (3), and a backrest seat (8) is ground on the workpiece (5). The tip (6) of the sleeve (13) of the tailstock (3) sits closely in the center of the receiver of the workpiece. The method is characterized in that the tip and the tailstock sleeve are retracted from the contact area, said contact area being located in the center of the clamping of the workpiece, to an intermediate position after the backrest seat has been ground. In addition, the workpiece is positionally fixed on the side of the tailstock by a backrest (7) and by an axial force which is applied via a prestressed pressure pin (21) and which is directed against the center of the clamping of the workpiece.
Description
21/45 ' 41 14 ~ 21 FA.B +d9 89 »2805ddd BARDEHLE OFFIr_.E DIUNIGH IQ pid ~thod and ipparatur for griadiag oroskpiec~r haviag aeat~rs ~rhich hav~ ~rrors og fvrsa The invention relates to t1 1L~(; shod and an apparatus for grind~.nc~ workni.RrRS having eQnters which have error3 of form.
The prioz a~ L imvluc3e5 precision machining, in partirn~lar the grinding of workpiocAS, the latter being aeconunodated between locating o~silLdi'S of a headstoCk and a fiail~t-n~k_ Tn this mounting, in particular such workpieces which are very thin-wall~c~ in the region of Z5 the mc»ni-ing center cause difficulties. Such workpiocc3 are often not pramachined in a geometrically accurate manner or h~vw in~nrn~rariess of form, suah as concentricity errors, xolated Lu c~lstortiOrl CauBed by a heat treatment applied ~ftRr th~a premachining. The removal of these distortion-related cituuldttl,y errors of thin-walled workpiPC:PS mm~_)_y cannot be corr~ct~d by $ubsoquent grinding on the outside rl.iaum~et~ oL l.he workpieces, i . P . r_hP ri rrn~'I a r. tty errors of th~ center are tran3mit~ted as dimensional or conc~rz~tic;ll.y errors during external Cylindrical grinding. ' bescribed in US 2.595, 858 is an axle l,~t.ha in which an axle-shaped workpieco aan bo mounted between a tallsLock and a headstock for turning. The tailstoek :i(7 and thQ hoadstock era Qach provided With a retaining fla~~c~c, the flange on the tailstock side hai.nr~ provided with friction surfaoes at its end face for holding the axle to be around. Furthermore. spring-loaded 1ai-.hR
r.Anters are provid~d on the tailstook and headstvck aide, these lathe centers, rCr the centering, engaging in cenr.RrinO hnres of the axles to be ground. A
disadvantage with this lathe is that erteCtive centering is not possib.l a~ c~mri ng the machining of . workpiece3 having centers.
21/05 ' 0i 1d ~ 22 FEZ +d9 80 ~2805ddd BA.RL~EHLE OFFIr..E DdUNiCH Id 015 - 1m -The object of tho invention is thereforr~ Lc prvvlde a mothod and an apparatus with whi.rh inaccuracies of form, such ae conacntricity errors, Of tllc~ c;~ilCering region of ~Che workpiecP ~rc~ not transmitted to the finished part during the machining, Im l.tila way, the c:~mplicated operation of center grinding before the finish grinding of the workpiece is L~ be dispensed wiL~l. Furthermore, a high production ~,.~ality is to be lU achiovad by the workpiocc having a faultle~~
21/OE '01 id~20 FAg +d9 89 92805ddd BARDEHL.E OFFICE MUNICH IQ 002 WU (JU/:~561'/ PC:T/FP99/()97I)7.
~ lh Mathcd and apparatus for grinding ~rork~ioeos having caa~rs ~rhioh haw errors of fosia ' The invention relates to a method and an apparatus of grinding workpieces having centers which hwa err .~ of form.
The prior art includco precision ma fining, in parti ~n I ~ r fihP gri ndi ng of workpi PnRS, th J.attRr hai ng accommodated between locating centers f a headstock and a zailstock. 1n this mounting, i particular such workpiecea which are very thin wall in the region of the mounting center cause difficul i~a. such worxpieces urc often not premachincd in a eometrically accurate manner or have inaccuracie of form, such as concentricity erroro, relate to di3tortion cau3ed by a heat treatment applied a- er the premachininQ. The removal of thcoc distort n-related circularity error3 of thin-walled workpie s usually cannot be corrected by subsequent grindin on the outaido diameter of the workpieces, i.e. th circularity errors of the center are transmitted as 'dimensional or concentricity crrora during external r~°lrindrical grinding.
The ob-~ect of the invention is therefore to provide a method a.nd an apparatus with which inaccuracies of form, sucl as concentricity erroLa, uL l.)ie c:eiil.eriue~
r.Pgion o the workpiscs ar~ not transmitted to th~
finishe part during the machining. Im Lt~i~ way, ~W
:iI) ~~mrl sated operation of cQntQr grinding before the fin'sh grinding of the workpiece is W L~ disp~ci~~sc~
w _h. FnrthRrmnr~, ~ hi gh prn~mti nn quality is to bs w a au ~ ouL~s~
circumference. The comp.Lete outer r_nntnmr i ~ tn ha perfectly ground in a single mounting.
This object is achiev~d by th~ features of patent ~ld,iiu 1 related to the method and of patent claim 2 21/0 '41 id~20 FAa +d9 SQ 92$05ddd BARDEHLE OFFICE MUNICH IQ 003 Wn 00/35617 PCT/EP99/09702 related to the appnratuo for carrying out the method.
The f~sal.ures of patent claim 3 devwlnp the apparatus ae al~i.med in claim 2 in terms of de3ign.
Thi s objoet is achieved in that the lvcatitty center of the tail~L~c:k, this locating rtanter being mounted on the tailstock quill, i~ dcaigned with a pressure pin which is jJLUVl,(,i~d with a spring element . Th! workpieco he machin~d is thus prcosed axially against the opposite loc:dLiitc~ center of the work spindle of th~
headstcnk. In this case, the workpicce is supported >ay a $toadyzdsl. ltt such a way as to be ti xad in position.
J:n an PmbodimQnt of the invention, the pressure ~ln consists ct a piston part and a roh part; thQ prosaure pi n i s mounted in th~ interior of the basic l:~u~iy uL the tailstock lvcr~Lltty center. The 'Cailsto~k will with tailqtnc-k locating center can be retractt~d i:u dtt intermediate positiutt. Thus the workpiec:P, fir thQ
machi ni nr~, is accommoda.t~d in an oxactly crtnl,~wed manner in the hesad~ Luck-side centeririQ rPgi cn and in the haws ot~ i-.ha steadyrest.
The inv~ntion ig axrlainsd in more detail in terms of th~ method and the apparatus im Lhe drawings anc:nrc~i.ng to figs 1 to 4.
Fiy. 1 shows a parr.ial plan view of a grinding machine with a partial sectional repwesentatiorr of the work m~uuting, fib- 2 shows a further partial plan view of the grinding machine according to fig. 1 wll.h a partial aectiomdl representation of the work mounting in an operating position.
FiQ. :i ahnws the tailstock-aide work mountii~y in sectional representation, with the tailstock ln~ating 21/05 '01 1dv20 FAg +d9 8>1 92805ddd BARDEHLE ~1FFICE MUNICH I~ p04 WO 00/3561? 8CT/EP99l09702 center in a ccrnt.ac;l. Wasition with set steadyr_Pgt-., which, h~wRVer, is not shown.
~'ig. 4 shows the tailstock-side work mounting in a acctional reprosantatiux~, wll.h pressure pin in a retrarr.~ad intermediate position of tho tailstock quill with the tailatock locating ~aWcr.
The mounting of a workpi~sc;e 5 on a grinding machine, for example, i~ ~hnwn in fig. 1. The workpicec 5 is mounted between the locating r:aiiLer 4 of the work spindle :if) ~f the headstock 1 and thw locating vcnter 6 with the cantor 11 of the tailst~c:k 3. The mounting and release of the warkpia~a hetwsan the locating coaster 4 of the work spindle 30 and the luC:a~.i,flc~ center 6 of the quill 13 is made possible by the tailstock quill 13 being retracted into a r~ar posilluci by traverse of the tailstock.
The headstock 1 and the t~ilstnc.k 3 are mountQd on s grinding tablo 2 (only partly slm~1) which is travez~sable in Lhe G-direc:fi i nn _ The haadstack 1 has a work spindle 30 which 13 driven via a moLUL' ar.Lve (not shcrwti) . The tailstock 3 is pravided with a traveling 25, tailstock quill 13 which is axially disYlac:edble inside thd lmusinq of 'Che tailstoCk 3. The ~antPr axes of the work spindle 30 of the hendstoak 1 and ut lie quill 13 of Lhe Lailstock 3 ar~ oriented exarf-.1y in alignmQnt with r~na another. The workpicce 5, with its longitu~lii~al axis likewise in aliqnmeni-., i :~ mr~untad in between. A staadyrest 7 with movable jaws 9 is arranga~7.
on the grinding LnLle 2. The grinding spindle 15 with the grinding wheol I6 is arranged ao that it can be se~i.
in an axially paialldl manne7r rela'Cive to the arrangement of hPadstock l and tailatock 3 of the machine tool in the diLe~c:t,iaii of the X-axis p~sjyendicular to the work momnt i,ng _ In addition, the - grinding apindlo 15 i3 arxanged in a~~ axially parallel 21/05 'O1 1d~20 FAg +d~ 89 a2805ddd BARDEHLE OFFICE MUNICH ~m 405 -a-manner relative to the Z - axis of the iudvhine tool . The giiiidinq wheel 16 is set in the direction of the X-axis at right angles to the workpiccc.
h According to fig, 2, the workpiece is mounted Lelween the luc;al.inc~ center 4 of thA haadstock 1 aad the locating center 6 of the tailstock 3. Sliic:e the wozkYiecr~ 5 in the center 11, which hr~ars against the locating center 6 of the tailstock 3, 15 very thin-walles, a centering deformation of the thin-walled rqgion of the workpiece 5 takcc place as a result uL
this c:aiupressive Iorces applied during t-hP mounting; For t-he tailstoek-side region of the mounting center of l.li~
wow kpiece 5 is pressed into a rounh share by the axial rnmpressive force originating from the lvcatiixy c:auLGr G of Llia l.dllstock 3 in COmbinat~ cn wi th the fr~.tstoconical locating center 6 of the tnilstock 3.
~n tree canter region of the workpiece 5, a atoadyres~L
coat 0, aga.irm~ wtllc;h a steadyrest 7 with mnv~hl a haws 9 is pat, is ground with the grinding wheel 1G, which can be sdl. a!. riyh~ angles 'CO the workpiPC:~ a~rnrding to i=hR X-axis and displaced in an axially parallel mann~r to the ~-axis an~i is arranged on r.hA car. inding 25, spindly 15_ The Workpiece 5 is then rcoet and finish-maahined in order to ~Ll.din, iri this way, geometric:~tly accurate workpiece S, i.c. a workpiece 5 free of circularity csrrurs .
Shown in fig. 3 is the emLucil~cmut for the frustoeonias 1 conriguraLion of the I cn~ti ng center 6 of the quill 13 of the tailatock 3, the locating cenLdr 6 being tipped with carbide bodies bA tnr reasons of wear and being arranged on z guide element 24, which is 1n alignment ~rith Lhe longitudinal axis oi= the qt~i 1 1 13 _ Tho guide elc~mant 2d has a central longitudinal bore whlcai is stepped in dia~ud~c~w, with bore sections hRC~.oming Smaller, toward the end of the locating oenter. At the 21/08 '01 1dv20 FAB +d9 89 92805dd4 BARDEHLE OFFICE MUNICH IQ 006 Wn 00/35617 PCT/EP99/09702 opposite end of the guide element 24, Ltie bore is deslyjied with its largest diamRfiar in order to ar-commodata an adjustable Ecrcw 23. The followixy kwre secllon has a smaller diameter. Arr~angecl, in this born section is a spring element 22 which is adaptesc3 ~~ l.tila~
diameteL dixd which bears on the Ana side against th~
and face of an adjustable screw 23 and on tlle~ V~tle.c side agaim~ ~tm enc~ face oL a cylindrir.~1 piston part ~6 of a pressuro pin 21 having the name dianiatd~. Ttie other en ~l ~i l.tie cylindrical piston pa rt ~ 6 has an axially running rod part 27 having a substantially smallew altimeter. The rod part 27 is pa~garl through the outlet bore of the guide element 24. The pressure piiz 21 prrslvdded with the spring element: 72 aPplias an axial. ford 32 to th~ workpiece 5.
In fig. 4, the quill 13 of the tailotock 3 is retracted to an interm~sdia~c~ p~5.t~ion according to arrow p~.~ition 10, so that the taper of the locating center G of thr~
tailatock 3 is no lu~~yer~ in pressure contact wi th thR
workpiecP 5, arr_.ording to position 1111. However, the pressure-pin rod 27, wl~ti the spring force of thw spring elPmPni-. ~~, PrPSSps the workp~.ece 5 against the locating center 4 of the wuwk spindle 30 of. r.ha headstock 1.
The SteadyregT 7 wnSmrca~ the radial orientation of the workpiocc 5 with regard to the luudl.lnq center 4 or 'Che work spindle 30 and the lnr.~ti ng canter 6 of the quill.
13. The locating center 6 oL l.he tailstock 3 can c:ujisequently be retracted 1-.~ an intorm~diate position 10 without impairing tho centering, ebtal~~ed during the mou~Wiciq, of the workpiece 5. Thi s travol must at least bP ~n large that the workpinec 5 no longer ouum5 Into contact wi~W.rie locating center 6 of the quill 13, so that thR workpiace 5 is given a contact-fr$e c~uLew 111. It is therefara surricient for the amount of travel to th;~ intermediate position 10 to be just a 21/45 '41 idv21 FAZ +d9 89 ~2845ddd BARDEH1.E oFFICE MUNICH id 447 few tenths of a millimei:e~ . Slttce the ZorQue of the rotary mcv~mant. of. the workpiace 5 is transmitted by the locating center 4 of the hea~;la L~c:k l, the workpieCe must ba pras~w~1 ar~ainst th~a locating canter 1 of the 5 work spindle 30 by a force 32. Tlte pressure pin 21 provides this tri.c-.tional connection via the rod part 27. In this way, the workpiece 5 is driven in a rotational manner and ig hw1 ri in thQ conterod position by the ateadyreat 7, so that cmuplel,e machining of the workpieCe 5 aft the oot.Rr rircumferenc~ is made possible. In this way, the outer ciZCm.ureremce of the tailsZOCk-side end oi~ i-.hR wr~rkpiaca 5 can also be machined without inaccuracies, i.e. circ:ularlLy errors, being transmitted to the w~rkriere 5_ Wlth the method according to the invention and the apparatuo for carrying out the matho~l, dL least one sequence of operations on another machine tool with another mounting system can be disperm~sd wlLh, as a result of which the machining angts ran be reduced. Tho method according to the invention and the aYpdLaLus developed for it are on no account rRstrictmd to the grind~Lng of workpieoe$: on the contrary, oth~s~
precislcit tadchining operations can ,~ 1 :~~ he carried out ~5, accordingly.
The prioz a~ L imvluc3e5 precision machining, in partirn~lar the grinding of workpiocAS, the latter being aeconunodated between locating o~silLdi'S of a headstoCk and a fiail~t-n~k_ Tn this mounting, in particular such workpieces which are very thin-wall~c~ in the region of Z5 the mc»ni-ing center cause difficulties. Such workpiocc3 are often not pramachined in a geometrically accurate manner or h~vw in~nrn~rariess of form, suah as concentricity errors, xolated Lu c~lstortiOrl CauBed by a heat treatment applied ~ftRr th~a premachining. The removal of these distortion-related cituuldttl,y errors of thin-walled workpiPC:PS mm~_)_y cannot be corr~ct~d by $ubsoquent grinding on the outside rl.iaum~et~ oL l.he workpieces, i . P . r_hP ri rrn~'I a r. tty errors of th~ center are tran3mit~ted as dimensional or conc~rz~tic;ll.y errors during external Cylindrical grinding. ' bescribed in US 2.595, 858 is an axle l,~t.ha in which an axle-shaped workpieco aan bo mounted between a tallsLock and a headstock for turning. The tailstoek :i(7 and thQ hoadstock era Qach provided With a retaining fla~~c~c, the flange on the tailstock side hai.nr~ provided with friction surfaoes at its end face for holding the axle to be around. Furthermore. spring-loaded 1ai-.hR
r.Anters are provid~d on the tailstook and headstvck aide, these lathe centers, rCr the centering, engaging in cenr.RrinO hnres of the axles to be ground. A
disadvantage with this lathe is that erteCtive centering is not possib.l a~ c~mri ng the machining of . workpiece3 having centers.
21/05 ' 0i 1d ~ 22 FEZ +d9 80 ~2805ddd BA.RL~EHLE OFFIr..E DdUNiCH Id 015 - 1m -The object of tho invention is thereforr~ Lc prvvlde a mothod and an apparatus with whi.rh inaccuracies of form, such ae conacntricity errors, Of tllc~ c;~ilCering region of ~Che workpiecP ~rc~ not transmitted to the finished part during the machining, Im l.tila way, the c:~mplicated operation of center grinding before the finish grinding of the workpiece is L~ be dispensed wiL~l. Furthermore, a high production ~,.~ality is to be lU achiovad by the workpiocc having a faultle~~
21/OE '01 id~20 FAg +d9 89 92805ddd BARDEHL.E OFFICE MUNICH IQ 002 WU (JU/:~561'/ PC:T/FP99/()97I)7.
~ lh Mathcd and apparatus for grinding ~rork~ioeos having caa~rs ~rhioh haw errors of fosia ' The invention relates to a method and an apparatus of grinding workpieces having centers which hwa err .~ of form.
The prior art includco precision ma fining, in parti ~n I ~ r fihP gri ndi ng of workpi PnRS, th J.attRr hai ng accommodated between locating centers f a headstock and a zailstock. 1n this mounting, i particular such workpiecea which are very thin wall in the region of the mounting center cause difficul i~a. such worxpieces urc often not premachincd in a eometrically accurate manner or have inaccuracie of form, such as concentricity erroro, relate to di3tortion cau3ed by a heat treatment applied a- er the premachininQ. The removal of thcoc distort n-related circularity error3 of thin-walled workpie s usually cannot be corrected by subsequent grindin on the outaido diameter of the workpieces, i.e. th circularity errors of the center are transmitted as 'dimensional or concentricity crrora during external r~°lrindrical grinding.
The ob-~ect of the invention is therefore to provide a method a.nd an apparatus with which inaccuracies of form, sucl as concentricity erroLa, uL l.)ie c:eiil.eriue~
r.Pgion o the workpiscs ar~ not transmitted to th~
finishe part during the machining. Im Lt~i~ way, ~W
:iI) ~~mrl sated operation of cQntQr grinding before the fin'sh grinding of the workpiece is W L~ disp~ci~~sc~
w _h. FnrthRrmnr~, ~ hi gh prn~mti nn quality is to bs w a au ~ ouL~s~
circumference. The comp.Lete outer r_nntnmr i ~ tn ha perfectly ground in a single mounting.
This object is achiev~d by th~ features of patent ~ld,iiu 1 related to the method and of patent claim 2 21/0 '41 id~20 FAa +d9 SQ 92$05ddd BARDEHLE OFFICE MUNICH IQ 003 Wn 00/35617 PCT/EP99/09702 related to the appnratuo for carrying out the method.
The f~sal.ures of patent claim 3 devwlnp the apparatus ae al~i.med in claim 2 in terms of de3ign.
Thi s objoet is achieved in that the lvcatitty center of the tail~L~c:k, this locating rtanter being mounted on the tailstock quill, i~ dcaigned with a pressure pin which is jJLUVl,(,i~d with a spring element . Th! workpieco he machin~d is thus prcosed axially against the opposite loc:dLiitc~ center of the work spindle of th~
headstcnk. In this case, the workpicce is supported >ay a $toadyzdsl. ltt such a way as to be ti xad in position.
J:n an PmbodimQnt of the invention, the pressure ~ln consists ct a piston part and a roh part; thQ prosaure pi n i s mounted in th~ interior of the basic l:~u~iy uL the tailstock lvcr~Lltty center. The 'Cailsto~k will with tailqtnc-k locating center can be retractt~d i:u dtt intermediate positiutt. Thus the workpiec:P, fir thQ
machi ni nr~, is accommoda.t~d in an oxactly crtnl,~wed manner in the hesad~ Luck-side centeririQ rPgi cn and in the haws ot~ i-.ha steadyrest.
The inv~ntion ig axrlainsd in more detail in terms of th~ method and the apparatus im Lhe drawings anc:nrc~i.ng to figs 1 to 4.
Fiy. 1 shows a parr.ial plan view of a grinding machine with a partial sectional repwesentatiorr of the work m~uuting, fib- 2 shows a further partial plan view of the grinding machine according to fig. 1 wll.h a partial aectiomdl representation of the work mounting in an operating position.
FiQ. :i ahnws the tailstock-aide work mountii~y in sectional representation, with the tailstock ln~ating 21/05 '01 1dv20 FAg +d9 8>1 92805ddd BARDEHLE ~1FFICE MUNICH I~ p04 WO 00/3561? 8CT/EP99l09702 center in a ccrnt.ac;l. Wasition with set steadyr_Pgt-., which, h~wRVer, is not shown.
~'ig. 4 shows the tailstock-side work mounting in a acctional reprosantatiux~, wll.h pressure pin in a retrarr.~ad intermediate position of tho tailstock quill with the tailatock locating ~aWcr.
The mounting of a workpi~sc;e 5 on a grinding machine, for example, i~ ~hnwn in fig. 1. The workpicec 5 is mounted between the locating r:aiiLer 4 of the work spindle :if) ~f the headstock 1 and thw locating vcnter 6 with the cantor 11 of the tailst~c:k 3. The mounting and release of the warkpia~a hetwsan the locating coaster 4 of the work spindle 30 and the luC:a~.i,flc~ center 6 of the quill 13 is made possible by the tailstock quill 13 being retracted into a r~ar posilluci by traverse of the tailstock.
The headstock 1 and the t~ilstnc.k 3 are mountQd on s grinding tablo 2 (only partly slm~1) which is travez~sable in Lhe G-direc:fi i nn _ The haadstack 1 has a work spindle 30 which 13 driven via a moLUL' ar.Lve (not shcrwti) . The tailstock 3 is pravided with a traveling 25, tailstock quill 13 which is axially disYlac:edble inside thd lmusinq of 'Che tailstoCk 3. The ~antPr axes of the work spindle 30 of the hendstoak 1 and ut lie quill 13 of Lhe Lailstock 3 ar~ oriented exarf-.1y in alignmQnt with r~na another. The workpicce 5, with its longitu~lii~al axis likewise in aliqnmeni-., i :~ mr~untad in between. A staadyrest 7 with movable jaws 9 is arranga~7.
on the grinding LnLle 2. The grinding spindle 15 with the grinding wheol I6 is arranged ao that it can be se~i.
in an axially paialldl manne7r rela'Cive to the arrangement of hPadstock l and tailatock 3 of the machine tool in the diLe~c:t,iaii of the X-axis p~sjyendicular to the work momnt i,ng _ In addition, the - grinding apindlo 15 i3 arxanged in a~~ axially parallel 21/05 'O1 1d~20 FAg +d~ 89 a2805ddd BARDEHLE OFFICE MUNICH ~m 405 -a-manner relative to the Z - axis of the iudvhine tool . The giiiidinq wheel 16 is set in the direction of the X-axis at right angles to the workpiccc.
h According to fig, 2, the workpiece is mounted Lelween the luc;al.inc~ center 4 of thA haadstock 1 aad the locating center 6 of the tailstock 3. Sliic:e the wozkYiecr~ 5 in the center 11, which hr~ars against the locating center 6 of the tailstock 3, 15 very thin-walles, a centering deformation of the thin-walled rqgion of the workpiece 5 takcc place as a result uL
this c:aiupressive Iorces applied during t-hP mounting; For t-he tailstoek-side region of the mounting center of l.li~
wow kpiece 5 is pressed into a rounh share by the axial rnmpressive force originating from the lvcatiixy c:auLGr G of Llia l.dllstock 3 in COmbinat~ cn wi th the fr~.tstoconical locating center 6 of the tnilstock 3.
~n tree canter region of the workpiece 5, a atoadyres~L
coat 0, aga.irm~ wtllc;h a steadyrest 7 with mnv~hl a haws 9 is pat, is ground with the grinding wheel 1G, which can be sdl. a!. riyh~ angles 'CO the workpiPC:~ a~rnrding to i=hR X-axis and displaced in an axially parallel mann~r to the ~-axis an~i is arranged on r.hA car. inding 25, spindly 15_ The Workpiece 5 is then rcoet and finish-maahined in order to ~Ll.din, iri this way, geometric:~tly accurate workpiece S, i.c. a workpiece 5 free of circularity csrrurs .
Shown in fig. 3 is the emLucil~cmut for the frustoeonias 1 conriguraLion of the I cn~ti ng center 6 of the quill 13 of the tailatock 3, the locating cenLdr 6 being tipped with carbide bodies bA tnr reasons of wear and being arranged on z guide element 24, which is 1n alignment ~rith Lhe longitudinal axis oi= the qt~i 1 1 13 _ Tho guide elc~mant 2d has a central longitudinal bore whlcai is stepped in dia~ud~c~w, with bore sections hRC~.oming Smaller, toward the end of the locating oenter. At the 21/08 '01 1dv20 FAB +d9 89 92805dd4 BARDEHLE OFFICE MUNICH IQ 006 Wn 00/35617 PCT/EP99/09702 opposite end of the guide element 24, Ltie bore is deslyjied with its largest diamRfiar in order to ar-commodata an adjustable Ecrcw 23. The followixy kwre secllon has a smaller diameter. Arr~angecl, in this born section is a spring element 22 which is adaptesc3 ~~ l.tila~
diameteL dixd which bears on the Ana side against th~
and face of an adjustable screw 23 and on tlle~ V~tle.c side agaim~ ~tm enc~ face oL a cylindrir.~1 piston part ~6 of a pressuro pin 21 having the name dianiatd~. Ttie other en ~l ~i l.tie cylindrical piston pa rt ~ 6 has an axially running rod part 27 having a substantially smallew altimeter. The rod part 27 is pa~garl through the outlet bore of the guide element 24. The pressure piiz 21 prrslvdded with the spring element: 72 aPplias an axial. ford 32 to th~ workpiece 5.
In fig. 4, the quill 13 of the tailotock 3 is retracted to an interm~sdia~c~ p~5.t~ion according to arrow p~.~ition 10, so that the taper of the locating center G of thr~
tailatock 3 is no lu~~yer~ in pressure contact wi th thR
workpiecP 5, arr_.ording to position 1111. However, the pressure-pin rod 27, wl~ti the spring force of thw spring elPmPni-. ~~, PrPSSps the workp~.ece 5 against the locating center 4 of the wuwk spindle 30 of. r.ha headstock 1.
The SteadyregT 7 wnSmrca~ the radial orientation of the workpiocc 5 with regard to the luudl.lnq center 4 or 'Che work spindle 30 and the lnr.~ti ng canter 6 of the quill.
13. The locating center 6 oL l.he tailstock 3 can c:ujisequently be retracted 1-.~ an intorm~diate position 10 without impairing tho centering, ebtal~~ed during the mou~Wiciq, of the workpiece 5. Thi s travol must at least bP ~n large that the workpinec 5 no longer ouum5 Into contact wi~W.rie locating center 6 of the quill 13, so that thR workpiace 5 is given a contact-fr$e c~uLew 111. It is therefara surricient for the amount of travel to th;~ intermediate position 10 to be just a 21/45 '41 idv21 FAZ +d9 89 ~2845ddd BARDEH1.E oFFICE MUNICH id 447 few tenths of a millimei:e~ . Slttce the ZorQue of the rotary mcv~mant. of. the workpiace 5 is transmitted by the locating center 4 of the hea~;la L~c:k l, the workpieCe must ba pras~w~1 ar~ainst th~a locating canter 1 of the 5 work spindle 30 by a force 32. Tlte pressure pin 21 provides this tri.c-.tional connection via the rod part 27. In this way, the workpiece 5 is driven in a rotational manner and ig hw1 ri in thQ conterod position by the ateadyreat 7, so that cmuplel,e machining of the workpieCe 5 aft the oot.Rr rircumferenc~ is made possible. In this way, the outer ciZCm.ureremce of the tailsZOCk-side end oi~ i-.hR wr~rkpiaca 5 can also be machined without inaccuracies, i.e. circ:ularlLy errors, being transmitted to the w~rkriere 5_ Wlth the method according to the invention and the apparatuo for carrying out the matho~l, dL least one sequence of operations on another machine tool with another mounting system can be disperm~sd wlLh, as a result of which the machining angts ran be reduced. Tho method according to the invention and the aYpdLaLus developed for it are on no account rRstrictmd to the grind~Lng of workpieoe$: on the contrary, oth~s~
precislcit tadchining operations can ,~ 1 :~~ he carried out ~5, accordingly.
Claims (2)
1. A method of machining workpieces having centers which have errors of form, the workpiece (5) being mounted between the locating center (4) of the work spindle (30) of the headstock (1) and the locating center (6) of the tailstock (3), and a steadyrest seat (8) being ground on the workpiece (5), the locating center (6) of the quill (13) of the tailstock (3) being in contact in the center (11) of the mounting of the workpiece (b), characterized in that, after the grinding of the steadyrest seal (8), the locating center (6) and the tailstock quill (13) are retracted from the contact region in the center (11) of the mounting of the workpiece (5) to an intermediate position, and the workpiece (5) is fixed in position on the tailstock side with a steadyrest (7) and an axial force which is directed toward the center (11) of the mounting of the workpiece (5) and is applied via a preloaded pressure pin (21) guided in the longitudinal axis (31) of the quill (13).
2. An apparatus for machining workpieces having centers which have errors of form, comprising a headstock (1) with a work spindle (30) and with a locating center (4) arranged on the longitudinal axis of the work spindle (30) and intended for accommodating the workpiece (5), a tailstock (3) having a quill (13) which has a tapered locating center (6) lying on the longitudinal axis (31) of the quill (13) and intended for accommodating the workpiece (5), a steadyrest (7), a grinding wheel (16) provided on a grinding spindle (15), and a grinding table (2), characterized in that a pressure pin (21) guided in the longitudinal axis (31) of the quill (13) and acted upon by a spring element (22) is arranged in the locating center (6) of the quill (13) of the tailstock (3).
The apparatus as claimed in claim 2, characterized in that the pressure pin (21) consists of a piston part (26) and a rod part (27) of a small diameter, the pressure pin (21) is acted upon on the head aide by a spring element, in particular by a helical spring or a disk-spring assembly, and the spring element (22) is connected to a screw (23) for setting the pressure.
The apparatus as claimed in claim 2, characterized in that the pressure pin (21) consists of a piston part (26) and a rod part (27) of a small diameter, the pressure pin (21) is acted upon on the head aide by a spring element, in particular by a helical spring or a disk-spring assembly, and the spring element (22) is connected to a screw (23) for setting the pressure.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19857359.6 | 1998-12-11 | ||
| DE19857359A DE19857359B4 (en) | 1998-12-11 | 1998-12-11 | Method and device for machining workpieces with thin-walled areas having centric deviations in shape |
| PCT/EP1999/009702 WO2000035617A1 (en) | 1998-12-11 | 1999-12-09 | Method and device for grinding workpieces with centers which comprise form variations |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2352426A1 true CA2352426A1 (en) | 2000-06-22 |
Family
ID=7890850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002352426A Abandoned CA2352426A1 (en) | 1998-12-11 | 1999-12-09 | Method and device for grinding workpieces with centers which comprise form variations |
Country Status (11)
| Country | Link |
|---|---|
| EP (1) | EP1137505A1 (en) |
| JP (1) | JP2002532263A (en) |
| KR (1) | KR20010093805A (en) |
| CN (1) | CN1329528A (en) |
| AU (1) | AU1974700A (en) |
| BR (1) | BR9916125A (en) |
| CA (1) | CA2352426A1 (en) |
| CZ (1) | CZ296983B6 (en) |
| DE (1) | DE19857359B4 (en) |
| RU (1) | RU2001118829A (en) |
| WO (1) | WO2000035617A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104493210A (en) * | 2014-12-08 | 2015-04-08 | 重庆第二机床厂有限责任公司 | High-speed rotation tailstock mechanism |
| CN113843668A (en) * | 2021-09-26 | 2021-12-28 | 广东拓斯达科技股份有限公司 | Full-automatic external grinding equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10144644B4 (en) * | 2001-09-11 | 2006-07-13 | Bsh Holice A.S. | Method and device for grinding centric bearing points of crankshafts |
| DE10232394B4 (en) * | 2002-07-17 | 2004-07-22 | Erwin Junker Maschinenfabrik Gmbh | Method and device for grinding a rotating roller |
| DE10308292B4 (en) | 2003-02-26 | 2007-08-09 | Erwin Junker Maschinenfabrik Gmbh | Method of cylindrical grinding in the manufacture of tools made of hard metal and cylindrical grinding machine for grinding cylindrical starting bodies in the manufacture of tools made of hard metal |
| EP1579954A1 (en) * | 2004-03-25 | 2005-09-28 | WENDT GmbH | Ram clamping device |
| IT1403602B1 (en) * | 2010-12-22 | 2013-10-31 | Tenova Spa | METHOD FOR THE POSITIONING OF OPERATIONAL CYLINDERS ON A GRINDING MACHINE AND GRINDING MACHINE THAT ACTIVATES THIS METHOD |
| CN102275123A (en) * | 2011-09-19 | 2011-12-14 | 湖州剑力金属制品有限公司 | Polishing device |
| CN103737034A (en) * | 2013-12-20 | 2014-04-23 | 广西南宁德通网络有限公司 | Running-in type lathe tailstock |
| DE102015206565B4 (en) * | 2015-04-13 | 2024-02-08 | Erwin Junker Grinding Technology A.S. | METHOD AND SYSTEM FOR EXTERNAL GRINDING OF SHAFT PARTS BETWEEN CENTERS |
| CN105127870A (en) * | 2015-09-09 | 2015-12-09 | 成都川睿科技有限公司 | Shaft part burr removal device for intelligent equipment in intelligent transportation system |
| CN105150061B (en) * | 2015-09-09 | 2017-09-26 | 盐城市三川轴承制造有限公司 | Surface deburring device for shaft parts of intelligent equipment in intelligent transportation system |
| CN105150062A (en) * | 2015-09-09 | 2015-12-16 | 成都川睿科技有限公司 | Deburring device for shaft parts of intelligent device in intelligent traffic system |
| CN107138990A (en) * | 2017-06-12 | 2017-09-08 | 芜湖中意液压科技股份有限责任公司 | A kind of all-hydraulic steering gear tooling for processing valve core |
| CN109317702A (en) * | 2017-07-31 | 2019-02-12 | 田中金属加工（上海）有限公司 | A kind of tailstock for four axis of machining center |
| CN108788951A (en) * | 2018-05-03 | 2018-11-13 | 佛山市南海九洲普惠风机有限公司 | A kind of diameter of axle grinding apparatus |
| CN108907967A (en) * | 2018-09-12 | 2018-11-30 | 深圳市欣汉生科技有限公司 | A kind of idler wheel piece automatically removes burr machine |
| CN109262082B (en) * | 2018-10-19 | 2024-07-12 | 陕西法士特齿轮有限责任公司 | Conical surface location quick change formula gear grinding anchor clamps for axle |
| CN110293432A (en) * | 2019-08-07 | 2019-10-01 | 安徽星瑞齿轮传动有限公司 | A kind of compound positioning spline milling clamper of top ringfeder and Workpiece clamping localization method |
| CN113414648A (en) * | 2021-07-28 | 2021-09-21 | 八环轴承（长兴）有限公司 | Surface processing method for cross roller bearing seal plug |
| CN114559105B (en) * | 2021-12-15 | 2023-11-21 | 郑州华威齿轮有限公司 | Gear shaft edge locking groove machining machine tool and machining method thereof |
| CN114473585A (en) * | 2022-01-17 | 2022-05-13 | 成都大金航太科技股份有限公司 | Fixing device of thin-wall annular part |
| CN114589623A (en) * | 2022-01-20 | 2022-06-07 | 中船澄西船舶修造有限公司 | Tool for supporting and grinding |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1768734A (en) * | 1928-08-18 | 1930-07-01 | Becker Fritz Heine | Ball-bearing center for machines |
| FR680204A (en) * | 1929-08-12 | 1930-04-26 | Process for the establishment of canoes and boats | |
| US2545858A (en) * | 1945-11-13 | 1951-03-20 | Morey Machinery Co Inc | Headstock and spindle |
| FR980204A (en) * | 1949-02-07 | 1951-05-09 | Permanent lubrication lathe tip | |
| DE2728156C2 (en) * | 1977-06-20 | 1982-09-23 | Famir International S.p.A., Torino | Holding device for rotationally symmetrical workpieces provided on a cylindrical grinding machine |
| DD223381B1 (en) * | 1984-05-02 | 1988-03-16 | Werkzeugmasch Forschzent | HEAD-PARTNER, PREFERABLY FOR MEASURING DEVICES |
| SU1349879A2 (en) * | 1986-02-10 | 1987-11-07 | Минский автомобильный завод | Lathe tailstock |
| US4768791A (en) * | 1987-10-05 | 1988-09-06 | Whiting Custom Enterprises, Inc. | Expandable grinding plug |
-
1998
- 1998-12-11 DE DE19857359A patent/DE19857359B4/en not_active Expired - Lifetime
-
1999
- 1999-12-09 CA CA002352426A patent/CA2352426A1/en not_active Abandoned
- 1999-12-09 KR KR1020017007035A patent/KR20010093805A/en not_active Application Discontinuation
- 1999-12-09 JP JP2000587916A patent/JP2002532263A/en active Pending
- 1999-12-09 AU AU19747/00A patent/AU1974700A/en not_active Abandoned
- 1999-12-09 EP EP99963457A patent/EP1137505A1/en not_active Withdrawn
- 1999-12-09 CN CN99813931A patent/CN1329528A/en active Pending
- 1999-12-09 WO PCT/EP1999/009702 patent/WO2000035617A1/en active IP Right Grant
- 1999-12-09 RU RU2001118829/02A patent/RU2001118829A/en not_active Application Discontinuation
- 1999-12-09 BR BR9916125-7A patent/BR9916125A/en not_active IP Right Cessation
- 1999-12-09 CZ CZ20012055A patent/CZ296983B6/en not_active IP Right Cessation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104493210A (en) * | 2014-12-08 | 2015-04-08 | 重庆第二机床厂有限责任公司 | High-speed rotation tailstock mechanism |
| CN113843668A (en) * | 2021-09-26 | 2021-12-28 | 广东拓斯达科技股份有限公司 | Full-automatic external grinding equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1329528A (en) | 2002-01-02 |
| EP1137505A1 (en) | 2001-10-04 |
| DE19857359A1 (en) | 2000-06-21 |
| AU1974700A (en) | 2000-07-03 |
| CZ20012055A3 (en) | 2002-05-15 |
| DE19857359B4 (en) | 2005-09-15 |
| WO2000035617A1 (en) | 2000-06-22 |
| CZ296983B6 (en) | 2006-08-16 |
| RU2001118829A (en) | 2003-05-27 |
| KR20010093805A (en) | 2001-10-29 |
| BR9916125A (en) | 2001-09-04 |
| JP2002532263A (en) | 2002-10-02 |
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