EP1427568A1 - Method and device for grinding central bearing positions on crankshafts - Google Patents
Method and device for grinding central bearing positions on crankshaftsInfo
- Publication number
- EP1427568A1 EP1427568A1 EP02777056A EP02777056A EP1427568A1 EP 1427568 A1 EP1427568 A1 EP 1427568A1 EP 02777056 A EP02777056 A EP 02777056A EP 02777056 A EP02777056 A EP 02777056A EP 1427568 A1 EP1427568 A1 EP 1427568A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- grinding
- bearing
- crankshaft
- grinding wheel
- ground
- 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.)
- Granted
Links
Classifications
-
- 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
-
- 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
- B24B5/36—Single-purpose machines or devices
- B24B5/42—Single-purpose machines or devices for grinding crankshafts or crankpins
- B24B5/421—Supports therefor
Definitions
- the present invention relates to a device for grinding central bearings, called crankshafts.
- the invention also relates to a device for performing such a method.
- the central bearing points can be finished by means of individual grinding wheels, but this is associated with a considerably longer grinding time, since each main bearing is processed individually.
- a relatively complex mask construction is required to provide the flexibility for such a grinding process.
- the most widely used method for large-scale production relates to so-called multi-bearing grinding, in which several grinding wheels of a grinding spindle come into engagement with the crankshaft at the said locations of the respective main bearings at the same time.
- the machines used for this are well known and have such a structure that an infeed unit on a machine bed by means of a grinding spindle and a dressing device direction is established.
- the dressing device is preferably advanced linearly in the direction of an axis which runs transversely to the main axis or central axis of the rotation of the crankshaft.
- a grinding table is arranged in the front area of such a grinding machine, which is either fixed on the machine bed or can be moved by means of a CNC axis in the direction of an axis which runs transversely to the infeed axis and parallel to the axis of rotation.
- a workpiece headstock and a tailstock are built on this grinding table, the workpiece headstock containing the workpiece spindle.
- the workpiece spindle is known to hold a chuck or a driver for the crankshaft.
- the tailstock is also built on the grinding table and can be moved manually to set different lengths of the crankshaft.
- a tailstock quill can be automatically advanced and retracted for loading and unloading the crankshaft, as is generally known from conventional circular grinding machines.
- crankshaft For the clamping of the crankshaft, which takes place on the headstock side, there are the possibilities either of a floating drive system or of centrally clamping chucks.
- the workpiece headstock and thus the crankshaft are set in rotation by means of a motor.
- the tailstock quill is provided with a corresponding counter tip, which is generally designed as a so-called standing tip.
- the crankshaft is then held in its center between the respective tips between the workpiece headstock and the tailstock quill, which ensures that the center axes of the workpiece spindle on the one hand and the tailstock quill on the other hand are exactly aligned with the central axis or axis of rotation of the crankshaft.
- the workpiece is automatically measured in real time during grinding using two measuring devices and the machine is corrected accordingly.
- corundum grinding wheels are generally very widespread, especially in crankshaft production. These machines are characterized by the fact that they have a wear amount of approximately 1,100 to 600 mm in the grinding wheel diameter. It can be assumed that all 20 to 30 ground crankshafts must be dressed and the dressing amount is on the order of approximately 0.03 mm.
- CBN grinding wheels preferably those which are bonded to ceramics and have a coating height of approximately 5 mm, have on the one hand the advantage that an increased cutting volume can be driven with them, on the other hand there is the disadvantage that the cutting forces are higher due to the specification of the grinding wheels, which makes the entire grinding process technically considerably more difficult.
- a major advantage of grinding with CBN grinding wheels is that increased cutting volume can be used and that the dressing cycles increase by approximately ten times, which means that the main and non-productive times themselves are lower overall in relation to the production of a crankshaft. This enables an increased output of crankshafts in relation to the time unit.
- the device is characterized in that an additional processing unit is provided for preprocessing at least one central bearing point of the crankshaft, which is provided for the final process of multi-bearing grinding as a bearing seat for placing a steady rest.
- the processing unit is preferably an additional grinding unit with at least one grinding wheel for grinding processing of the central bearing point of the crankshaft provided for the steady rest bearing seat.
- the at least one grinding wheel of the processing unit has a narrower width than the width of the central bearing point, so that a so-ground ground track for the steady rest is created on the main bearing that the steady rest jaws can be attached without problems.
- the ground track created by the narrow grinding wheel must be at least approx. 2 mm wider than the steady rest jaws themselves. This procedure is mainly used where main bearings with corner radii have to be ground.
- the additional processing unit of the crankshaft can either be fed in or swiveled in when the grinding spindle for final multi-bearing grinding of the crankshaft is in the disengaged position with the crankshaft.
- multi-bearing grinding is carried out in such a way that at least the bearing point is pre-grinded to the final dimension is ground, which is to serve as a bearing seat for a bezel. This means that all machining steps are carried out when the workpiece is clamped.
- Another possibility is, as described above in connection with the device, to grind the steady rest seat by means of a grinding wheel, an additional grinding device being used within the grinding machine.
- the steady rest is always tracked to a perfect counter bearing during multi-bearing grinding to the final dimension of the bearing point, with measuring devices automating the crankshaft during the process. Measure the table so that the grinding process can be carried out practically identically to grinding with corundum grinding wheels.
- Figure 1 is a schematic plan view of a grinding cell of the device according to the invention when grinding the steady rest;
- Figure 2 is a simplified schematic side view to illustrate the
- FIG. 3 shows a schematic top view during multi-bearing grinding of the curve shaft
- Figure 4 is a simplified schematic side view with the pivoted out
- Figure 5 shows an engagement of the grinding wheel when grinding bearing points with lateral radii
- Figure 6 grinding a steady rest at a bearing with a pre-machined raised track.
- FIG. 1 shows a simplified representation in the form of a top view, a crankshaft 1 with the clamping situation and the grinding wheel set 12, 13 being shown.
- the crankshaft 1 is received in a floating chuck 6 with a tip 8 in the center of the crankshaft 1 and is positioned in its length by a longitudinal stop 7.
- the floating jaws of the chuck 6 span the crankshaft 1 on its flange, so that the radial entrainment is guaranteed for grinding.
- crankshaft 1 On the tailstock side, the crankshaft 1 is also received by a centering tip 9, so that the crankshaft 1 is received and tensioned at both ends in its already machined centerings, as a result of which it is precisely positioned for grinding in terms of its position and tension.
- measuring devices 4 and 5 installed on the grinding table are shown, but they do not attack the crankshaft when grinding the steady rest.
- the bezel 3 is also set up on the grinding table, but is not necessarily placed on the workpiece with its jaws when grinding the steady rest.
- the crankshaft 1 has a plurality of main bearings 15, namely in the present example I, II, III and IN.
- the steady rest is ground on the centrically rotating main bearing II.
- a processing unit 11 in the form of an additional grinding device is used, which is preferably designed with a spindle unit in the form of a motor spindle.
- This motor spindle receives a grinding wheel 10 on its spindle nose in the front region.
- this additional grinding device 11 can be pivoted in to the crankshaft, it must be parallel to the Z-axis, which represents the C ⁇ C-ner driving axis of the grinding table, and the grinding wheels 13 must be cleared by means of the X-axis, which is used for the infeed movement of the grinding headstock 12 , So that the crankshaft 1 does not have to be moved in the direction of the X axis, this additional grinding device 11 is pivoted in when grinding the steady rest in such a way that the narrow grinding wheel 10 for grinding the steady rest is arranged essentially centrally in front of a grinding wheel 13 of the grinding wheel set of the grinding spindle 12 is.
- the X axis which is used to move the grinding headstock on which the additional grinding device 11 is also built, is used to enable the grinding wheel 10 to be fed to the crankshaft.
- FIG. 1 also shows the grinding spindle 12, which has a central axis 14 which runs exactly parallel to the crankshaft and about which the grinding wheels 13 can be rotated for machining the main bearings I to IV.
- crankshaft 1 The main bearings to be ground on crankshaft 1 are identified by reference number 15.
- the grinding wheel 10 has a width of approx. 10 to 12 mm, the steady rest being, for example, approx. 8 mm wide.
- a grinding wheel made of corundum or a CBN grinding wheel can, for example, be used as the grinding means for grinding the steady rest.
- the additional grinding device 11 is described as a pivotable unit. However, it is also possible to either retract or swivel in this additional grinding device 11 at any position within the grinding machine.
- FIG. 2 shows a greatly simplified side view in the area of the main bearing II in FIG. 1.
- the grinding wheel 10 for grinding the steady rest is arranged in front of a grinding wheel 13 of the grinding spindle 12.
- the average is Crankshaft 1 shown.
- the central axes of all grinding wheels 10 and 13 and the central axis of the crankshaft 1 are aligned in parallel, these central axes preferably lying in a horizontal plane.
- the corrections are then made via the CNC control of the machine, with the measuring devices continuously recording the actual values on the diameter of the main bearings I and IN. As soon as the target dimension for grinding is reached on one of the main bearings of crankshaft 1, the grinding cycle is then ended and the grinding spindle 12 is cleared.
- FIG. 4 shows a simplified side view of that shown in FIG. 3
- FIG. 5 shows in detail the process of grinding with the grinding wheel 13 on the main bearing of the crankshaft 1, the base body of the grinding wheel 13 A and the CBN coating being designated by 14.
- the covering height is generally approx. 5 mm.
- the lateral radii 15 on the main bearing of the crankshaft 1 are also ground here.
- a flat shoulder height of approx. 4 to 5 mm is also ground.
- FIG. 6 shows a simplified illustration of how grinding is carried out on the main bearing with the grinding wheel 13.
- the main bearing has an elevation 16, which was applied by pre-processing, for example whirl milling or turning on a separate device. It can be clearly seen that the grinding wheel 13 is in sliding engagement only on the elevation 16 on this main bearing, but the lateral zones 17 and the other main bearings of the crankshaft 1 are not also ground when grinding the steady rest seat. After the steady rest is ground on the circumference of the elevation 16, the steady rest is turned on.
- the grinding wheel set is then further advanced so that the crankshaft 1 can be ground to the finished gauge block.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10144644A DE10144644B4 (en) | 2001-09-11 | 2001-09-11 | Method and device for grinding centric bearing points of crankshafts |
DE10144644 | 2001-09-11 | ||
PCT/EP2002/010135 WO2003022521A1 (en) | 2001-09-11 | 2002-09-10 | Method and device for grinding central bearing positions on crankshafts |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1427568A1 true EP1427568A1 (en) | 2004-06-16 |
EP1427568B1 EP1427568B1 (en) | 2005-01-19 |
Family
ID=7698575
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02777056A Expired - Fee Related EP1427568B1 (en) | 2001-09-11 | 2002-09-10 | Method and device for grinding central bearing positions on crankshafts |
Country Status (10)
Country | Link |
---|---|
US (1) | US6913522B2 (en) |
EP (1) | EP1427568B1 (en) |
JP (1) | JP4047277B2 (en) |
KR (1) | KR100820985B1 (en) |
CN (1) | CN100343017C (en) |
CZ (1) | CZ304903B6 (en) |
DE (2) | DE10144644B4 (en) |
ES (1) | ES2235096T3 (en) |
RU (1) | RU2303510C2 (en) |
WO (1) | WO2003022521A1 (en) |
Families Citing this family (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
JP4730944B2 (en) * | 2004-06-04 | 2011-07-20 | コマツNtc株式会社 | Multi-head grinding machine and grinding method using multi-head grinding machine |
DE102004043404A1 (en) * | 2004-09-08 | 2006-03-09 | Volkswagen Ag | Method for processing rotary parts |
DE102005024389B4 (en) * | 2005-05-27 | 2016-03-31 | Schaeffler Technologies AG & Co. KG | Method and device for grinding the outer circumferential surface of a shaft or roller-shaped workpiece |
DE102007009843B4 (en) | 2007-02-28 | 2010-04-08 | Erwin Junker Maschinenfabrik Gmbh | Method for grinding a machine component and grinding machine for carrying out the method |
DE102007026562B4 (en) * | 2007-06-08 | 2010-08-26 | Erwin Junker Maschinenfabrik Gmbh | Grinding center and method for simultaneously grinding multiple bearings of crankshafts |
DE102007034706B3 (en) * | 2007-07-25 | 2008-09-11 | Erwin Junker Maschinenfabrik Gmbh | Grinding center and method for simultaneous grinding of multiple bearings and end faces of crankshafts |
KR200449624Y1 (en) * | 2007-11-16 | 2010-07-23 | 주식회사 세기텍 | cover for boundary stone of road |
CN101214627B (en) * | 2008-01-18 | 2010-08-11 | 潘旭华 | Grinding processing method for crankshaft connecting rod neck |
DE102008007175B4 (en) * | 2008-02-01 | 2010-06-02 | Erwin Junker Maschinenfabrik Gmbh | Method for grinding the main and stroke bearings of a crankshaft by external cylindrical grinding and apparatus for carrying out the method |
DE102009024209B4 (en) * | 2009-06-08 | 2012-12-06 | Erwin Junker Maschinenfabrik Gmbh | METHOD AND DEVICE FOR MULTILAYER GRINDING OF WORKPIECES |
US9033762B2 (en) * | 2009-07-22 | 2015-05-19 | Jtekt Corporation | Method and device for preventing slip of work piece |
DE102009051737B3 (en) * | 2009-11-03 | 2010-10-07 | Erwin Junker Maschinenfabrik Gmbh | Method for grinding main and pin bearings of crankshaft by external cylindrical grinding in grinding machine, involves bringing defined geometric longitudinal axis of crankshaft in accordance with rotation axis of assigned workpiece |
JP5505099B2 (en) * | 2010-06-04 | 2014-05-28 | 株式会社ジェイテクト | Grinding method with compound grinder |
JP5577166B2 (en) * | 2010-06-24 | 2014-08-20 | コマツNtc株式会社 | Machine Tools |
DE102010036065B4 (en) * | 2010-09-01 | 2014-02-06 | Erwin Junker Grinding Technology A.S. | Method for cylindrical grinding of a workpiece, the workpiece-containing system and device for centerless cylindrical grinding of the system |
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 |
DE102011076809B4 (en) * | 2011-05-17 | 2014-06-26 | Erwin Junker Maschinenfabrik Gmbh | METHOD FOR COMPLETE MACHINING OF AT LEAST UNWORKED PULLEYS AND PLANE SHEETS OF FORGED OR CASTED COILS OF A CRANKSHAFT AND PRODUCTION LINE PROVIDED FOR IMPLEMENTING THE PROCESS |
CN103464803A (en) * | 2013-08-24 | 2013-12-25 | 中国北车集团大同电力机车有限责任公司 | Workpiece end face threaded hole machining method and device |
WO2015124204A1 (en) * | 2014-02-21 | 2015-08-27 | Supfina Grieshaber Gmbh & Co. Kg | Finishing device and method for machining shaft axial bearings |
EP3152000B1 (en) * | 2014-08-06 | 2021-11-10 | Supfina Grieshaber GmbH & Co. KG | Finishing device for finish machining of a workpiece, in particular of a crankshaft or a camshaft |
DE102015206082A1 (en) * | 2015-04-02 | 2016-10-06 | Mahle International Gmbh | grinding machine |
CN106112731A (en) * | 2016-07-01 | 2016-11-16 | 无锡康柏斯机械科技有限公司 | A kind of surface of tyre rough thorn sanding apparatus |
CN107336121B (en) * | 2017-09-05 | 2019-02-19 | 湖州吴兴华隆机械有限公司 | Polishing machine is used in a kind of processing of automobile crane |
CN110238711B (en) * | 2019-07-11 | 2020-03-24 | 杭州之江磁业有限公司 | Grinding process for casting alnico magnetic steel |
CN110774066B (en) * | 2019-11-05 | 2020-12-01 | 平湖市超越时空图文设计有限公司 | Metal dysmorphism piece location presss from both sides tight equipment of polishing |
CN110842705B (en) * | 2019-11-22 | 2021-03-19 | 安徽鼎恒实业集团有限公司 | Grinding device for crankshaft remanufacturing |
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GB1084842A (en) * | 1966-05-02 | 1967-09-27 | Newall Eng | Improvements in or relating to machining apparatus and methods |
DE3121609A1 (en) * | 1981-05-30 | 1982-12-23 | Naxos-Union Schleifmittel- Und Schleifmaschinenfabrik, 6000 Frankfurt | GRINDING MACHINE FOR LIFTING BEARINGS |
US4790698A (en) * | 1987-05-13 | 1988-12-13 | Cm Systems, Incorporated | Monotonic cutting machine |
JP2930462B2 (en) * | 1991-12-26 | 1999-08-03 | 豊田工機株式会社 | Grinding method |
DE19857359B4 (en) * | 1998-12-11 | 2005-09-15 | Erwin Junker Maschinenfabrik Gmbh | Method and device for machining workpieces with thin-walled areas having centric deviations in shape |
JP3649037B2 (en) * | 1999-04-14 | 2005-05-18 | 豊田工機株式会社 | Compound grinding machine |
DE19919893A1 (en) * | 1999-04-30 | 2000-11-09 | Junker Erwin Maschf Gmbh | Pre- and finish grinding a crankshaft in one setup |
-
2001
- 2001-09-11 DE DE10144644A patent/DE10144644B4/en not_active Expired - Fee Related
-
2002
- 2002-09-10 RU RU2004110944/02A patent/RU2303510C2/en not_active IP Right Cessation
- 2002-09-10 ES ES02777056T patent/ES2235096T3/en not_active Expired - Lifetime
- 2002-09-10 EP EP02777056A patent/EP1427568B1/en not_active Expired - Fee Related
- 2002-09-10 KR KR1020047002402A patent/KR100820985B1/en not_active IP Right Cessation
- 2002-09-10 JP JP2003526636A patent/JP4047277B2/en not_active Expired - Fee Related
- 2002-09-10 CN CNB02815794XA patent/CN100343017C/en not_active Expired - Fee Related
- 2002-09-10 WO PCT/EP2002/010135 patent/WO2003022521A1/en active IP Right Grant
- 2002-09-10 US US10/489,529 patent/US6913522B2/en not_active Expired - Fee Related
- 2002-09-10 CZ CZ2004-346A patent/CZ304903B6/en not_active IP Right Cessation
- 2002-09-10 DE DE50202079T patent/DE50202079D1/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO03022521A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN100343017C (en) | 2007-10-17 |
CZ304903B6 (en) | 2015-01-14 |
JP4047277B2 (en) | 2008-02-13 |
US6913522B2 (en) | 2005-07-05 |
KR20040030974A (en) | 2004-04-09 |
US20040248502A1 (en) | 2004-12-09 |
JP2005501754A (en) | 2005-01-20 |
DE50202079D1 (en) | 2005-02-24 |
EP1427568B1 (en) | 2005-01-19 |
RU2303510C2 (en) | 2007-07-27 |
KR100820985B1 (en) | 2008-04-10 |
ES2235096T3 (en) | 2005-07-01 |
WO2003022521A1 (en) | 2003-03-20 |
CN1541150A (en) | 2004-10-27 |
DE10144644A1 (en) | 2003-04-10 |
CZ2004346A3 (en) | 2004-08-18 |
RU2004110944A (en) | 2005-06-10 |
DE10144644B4 (en) | 2006-07-13 |
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