EP0772509A1 - Verfahren und vorrichtung zum schleifen von nocken mit konkaven flanken - Google Patents
Verfahren und vorrichtung zum schleifen von nocken mit konkaven flankenInfo
- Publication number
- EP0772509A1 EP0772509A1 EP95924942A EP95924942A EP0772509A1 EP 0772509 A1 EP0772509 A1 EP 0772509A1 EP 95924942 A EP95924942 A EP 95924942A EP 95924942 A EP95924942 A EP 95924942A EP 0772509 A1 EP0772509 A1 EP 0772509A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- grinding
- grinding wheel
- cam
- camshaft
- wheel
- 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
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000001816 cooling Methods 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
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
- B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
- B24B19/08—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding non-circular cross-sections, e.g. shafts of elliptical or polygonal cross-section
- B24B19/12—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding non-circular cross-sections, e.g. shafts of elliptical or polygonal cross-section for grinding cams or camshafts
Definitions
- the invention relates to a method and a device for grinding concave flanks of cams of a camshaft.
- a cam is pre-ground from the raw contour to an intermediate contour using a first, large grinding wheel. Then, in the plunge-cut grinding process, a modified intermediate contour corresponding to the concave flanks is produced by means of a second grinding wheel of smaller diameter. The cam is then ground with the same grinding wheel and thus brought to its final contour.
- the use of a small grinding wheel, which is wider than the cam, for producing the modified intermediate contour means that optimal cooling cannot take place because the grinding wheel is in engagement in the entire flat area of the concave flank and thus the grinding zone.
- the invention is based on the object of developing a method and a device of the type presumed to be known in such a way that an optimal grinding process with regard to grinding wheel loading and cooling is possible, and that a modified intermediate contour with
- REPLACEMENT BLA ⁇ (RULE 26) As uniform an allowance as possible for finishing the hollow flank or the outer surface of the cam can be produced.
- the grinding wheel used to produce the modified intermediate contour is made narrower on the grinding surface than the cam width, an intermediate contour being ground in the longitudinal feed of this grinding wheel when the cam is at a radial standstill.
- the modified intermediate contour is thus produced in the smallest possible grinding zone between the grinding wheel and the cam, so that optimal cooling is achieved.
- the grinding wheel which is used to grind out the modified intermediate contour in the concave region of the start and end zone of the cam, offers further advantages.
- the size of the grinding dimension for the final grinding of the cam in the concave flank is almost constant if the radius of the flank to be ground on the cam is essentially constant. Since in the known method according to DE 41 37 924 Cl the grinding wheel for grinding out the modified intermediate contour is to be selected to be substantially larger than twice the radius of the concave flank of the cam, a uniform allowance for finish grinding can never be achieved when grinding out the modified intermediate contour become. This inevitably leads to an increase in grinding wheel wear and tear on the grinding wheel for finish grinding
- REPLACEMENT BLA ⁇ (RULE 26) an increase in the grinding time when finishing the outer cam contour with the small grinding wheel.
- the particularly good cooling in the method according to the invention allows high cutting performance and thus a short machining time, due to a low heat input into the grinding zone of the workpiece, so that undesired structural changes, grinding cracks and thus a loss of hardness in the surface area of the cam are excluded.
- the second grinding wheel which is only used to produce the modified intermediate contour, can be optimally designed for this purpose with regard to grinding wheel dimensions and specification, and a grinding wheel with optimal specification and with optimal grinding wheel dimensions is also used for finish grinding.
- the cam is pre-ground over its entire circumference using a grinding wheel with a relatively large diameter.
- the grinding surface of the grinding wheel for producing the modified intermediate contour can be equipped with a small clearance angle between the workpiece and the outer surface of the grinding wheel, as is known per se; see. DE 34 35 31. " 2, although a rotationally symmetrical workpiece is processed there. Due to the clearance angle, a modified intermediate contour is created during the grinding process, in which a relatively large amount of material in the In comparison to the final grinding of the concave flanks, there is an essentially linear contact between the finished contour of the modified intermediate contour and the grinding wheel between the outer surface of the abrasive coating and the end face of the zone in engagement.
- the clearance angle can be produced in such a way that the grinding wheel is pivoted horizontally, or that the grinding wheel is dressed on its surface line to the value of the low clearance angle. This further promotes the desired improvement in cooling.
- the device-like solution to the problem is mentioned in claim 2.
- the arrangement of the grinding spindles on the headstock has the advantage that both spindles are built on the same guide (X axis).
- This arrangement in which two linear guides do not have to be placed one above the other, enables very high rigidity values to be achieved on the grinding slide. Since the high rigidity of the grinding headstock and the guide system have a positive effect on the accuracy of the workpiece to be produced, optimal dimensional and shape accuracy can be achieved on the finished cam. These high stiffness values of the guide system increase the process reliability of the method and thus also result in reduced grinding wheel wear.
- ERSATZBLAH (RULE 26) 2 shows the second method step for producing the modified intermediate contour
- FIG. 2A shows a top view of the device shown in FIG. 2,
- Fig. 5 shows the device shown in Fig. 4 after pivoting the
- Cams 1 are arranged at intervals on a camshaft 2.
- the cams have to be ground very precisely to their finished contour, which is particularly difficult when, as in the present case, the cams are provided with concave flanks.
- 1 to 5 show that three grinding wheels are used, namely one grinding wheel for pre-grinding, one grinding wheel for producing the modified intermediate contour and one grinding wheel for finish grinding.
- the first method step is shown in FIG. 1.
- the cams 1 are ground from their raw contour 3 to an intermediate contour 4 with a first grinding wheel 7.
- the first grinding wheel 7 has a relatively large diameter, for example approximately 400 mm, and because of the flat curvature of the grinding wheel associated therewith it is not possible to grind out the concave flanks.
- the process step for grinding the concave flanks onto the modified intermediate contour is shown in FIGS. 2 and 2A.
- the modified intermediate contour 6, that is to say the concavity of the flanks, is produced by a second grinding wheel 8.
- This grinding wheel 8 is considerably narrower than the width of the cam 1 to be ground, particularly with regard to its grinding surface;
- the second grinding wheel 8 has a grinding surface width of, for example, 4 mm, the cam width in car cam shafts usually being approximately 10 to 20 mm.
- the modified intermediate contour 6 is ground with the second grinding wheel 8 in such a way that when the cam 1 is at a radial standstill, the contour is ground in the longitudinal feed indicated by arrow A. So there is no plunge grinding to grind the modified intermediate contour.
- the grinding direction for grinding out the modified intermediate contour with the grinding wheel 8 can be preselected by the CNC control on the machine.
- the second grinding wheel 8 has a diameter which corresponds approximately to twice the concave radius of the concave flanks of the cam 1.
- the modified intermediate contour 6 can be ground out by arranging a clearance angle, whereby an essentially linear contact between the surface line of the grinding wheel and the workpiece is achieved.
- the third grinding wheel 9 is also mounted, which is smaller and smaller in diameter
- REPLACEMENT BLA ⁇ (RULE 26) than the grinding wheel 8.
- the cam is ground from the modified intermediate contour 6 to the finished contour 5, as shown in FIG. 3.
- this small diameter of the third grinding wheel 9 it can be used to grind the complete cam outer contour with the concave flanks of the cam to the finished size without difficulty.
- the camshaft 2 is clamped between a workpiece headstock 14 and a tailstock 15 and is supported at the bearing points of the camshaft by steadies 16.
- the grinding spindles 12 and 13 are pivotable with a headstock 10, as indicated by the arrow line B.
- the swiveling takes place at an angle of, for example, 60 °, the grinding spindle arrangement also having other angles, e.g. 180 °.
- the headstock 10 which is mounted on the grinding slide, two grinding spindles 12 and 13 are arranged.
- the first grinding wheel 7, which is shown in FIG. 4 in the grinding position, is mounted on the grinding spindle 12, while the grinding wheel set comprising the second 8 and third grinding wheel 9, which is mounted on the second grinding spindle 13, is pivoted away from the workpiece.
- FIG 5 shows the device after the headstock 10 has been pivoted.
- the grinding wheels 8 and 9 are now in the grinding position while the first grinding wheel 7 is pivoted away.
- SPARE BLADE Under the headstock 10 is the grinding slide with a guide and, in the extension of the guide, a numerically controlled drive for generating the cam stroke in the direction of the X-axis as a function of the rotary movement (C-axis).
- the camshaft is fed longitudinally via the Z-axis.
- the axes of the grinding machine are CNC controlled.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Alcoholic Beverages (AREA)
- Confectionery (AREA)
- Medicines Containing Plant Substances (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4426452A DE4426452C1 (de) | 1994-07-26 | 1994-07-26 | Verfahren und Maschine zum Schleifen von Nocken mit konkaven Flanken |
DE4426452 | 1994-07-26 | ||
PCT/EP1995/002490 WO1996003257A1 (de) | 1994-07-26 | 1995-06-26 | Verfahren und vorrichtung zum schleifen von nocken mit konkaven flanken |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0772509A1 true EP0772509A1 (de) | 1997-05-14 |
EP0772509B1 EP0772509B1 (de) | 1999-11-17 |
Family
ID=6524179
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95924942A Expired - Lifetime EP0772509B1 (de) | 1994-07-26 | 1995-06-26 | Verfahren und vorrichtung zum schleifen von nocken mit konkaven flanken |
Country Status (13)
Country | Link |
---|---|
US (1) | US5899797A (de) |
EP (1) | EP0772509B1 (de) |
JP (1) | JPH10502878A (de) |
KR (1) | KR100373116B1 (de) |
CN (1) | CN1077001C (de) |
BR (1) | BR9508336A (de) |
CA (1) | CA2192988A1 (de) |
DE (2) | DE4426452C1 (de) |
ES (1) | ES2139910T3 (de) |
GE (1) | GEP20002083B (de) |
RU (1) | RU2138384C1 (de) |
UA (1) | UA39978C2 (de) |
WO (1) | WO1996003257A1 (de) |
Families Citing this family (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19620813C2 (de) * | 1996-05-23 | 2000-07-20 | Junker Erwin Maschf Gmbh | Verfahren und Vorrichtung zum Unrundschleifen von Nockenformen mit konkaven Flanken |
GB9612734D0 (en) * | 1996-06-18 | 1996-08-21 | Western Atlas Uk Ltd | Improvements in and relating to grinding machines |
GB2346574B (en) * | 1999-02-03 | 2001-09-19 | Unova Uk Ltd | Angle head grinding method and apparatus |
GB2357719B (en) * | 1999-10-27 | 2003-06-04 | Unova Uk Ltd | Grinding machine having two wheels |
US20030186631A1 (en) * | 2002-03-29 | 2003-10-02 | Toyoda Koki Kabushiki Kaisha | Cylindrical grinder, and mechanism for producing relative movement between grinding wheel and workpiece in cylindrical grinder |
DE10234707B4 (de) * | 2002-07-30 | 2007-08-02 | Erwin Junker Maschinenfabrik Gmbh | Verfahren und Vorrichtung zum Schleifen eines rotationssymmetrischen Maschinenbauteils |
DE10333916B4 (de) * | 2003-07-25 | 2010-10-14 | Audi Ag | Verfahren zum Schleifen der Nocken von Brennkraftmaschinen-Nockenwellen |
EP2163341B1 (de) * | 2008-09-12 | 2019-07-10 | Jtekt Corporation | Maschinenwerkzeug mit Ablagevorrichtung und Bearbeitungsverfahren dafür |
EP2184133B1 (de) * | 2008-11-05 | 2010-08-04 | Supfina Grieshaber GmbH & Co. KG | Finishmaschine mit einer Steinwendeeinheit |
JP5428740B2 (ja) * | 2009-10-19 | 2014-02-26 | 株式会社ジェイテクト | 複合研削盤 |
DE202009014739U1 (de) * | 2009-10-20 | 2011-03-10 | Schaudt Mikrosa Gmbh | Schleifmaschine mit zwei Spindelsätzen |
CN101725691A (zh) * | 2009-12-23 | 2010-06-09 | 奇瑞汽车股份有限公司 | 一种凸轮加工方法 |
CN102452030B (zh) * | 2010-10-27 | 2016-07-06 | 株式会社捷太格特 | 磨削方法、磨削系统以及多功能磨削机床 |
DE102011102113A1 (de) * | 2011-05-20 | 2012-11-22 | Schaudt Mikrosa Gmbh | Mehrscheiben-Schleifmaschine mit zumindest zwei Spindelsätzen |
CN102240950B (zh) * | 2011-05-31 | 2013-11-20 | 广州市敏嘉制造技术有限公司 | 基于变径砂轮磨削的弧面凸轮磨削中心 |
CN103586755A (zh) * | 2013-04-05 | 2014-02-19 | 鹤壁汽车工程职业学院 | 级进柔性磨光机 |
DE102014018784A1 (de) * | 2014-12-19 | 2016-06-23 | Thyssenkrupp Presta Teccenter Ag | Verfahren zur Erzeugung eines Nockenprofils eines Nockenpaketes einer Nockenwelle und Nockenwelle |
DE102015211115B4 (de) * | 2015-06-17 | 2022-11-03 | Erwin Junker Maschinenfabrik Gmbh | Verfahren und Schleifmaschine zum Schleifen von Außen- und Innenkonturen von Werkstücken in einer Aufspannung |
CN104972278A (zh) * | 2015-06-29 | 2015-10-14 | 安庆市吉安汽车零件锻轧有限公司 | 一种高精度凸轮轴加工方法 |
CN105150123A (zh) * | 2015-09-25 | 2015-12-16 | 泰州市宏祥动力机械有限公司 | 用于凸轮去毛刺的砂轮 |
JP6658178B2 (ja) * | 2016-03-23 | 2020-03-04 | 株式会社ジェイテクト | カム研削装置、およびカム研削方法 |
US10654144B2 (en) * | 2018-01-17 | 2020-05-19 | Dave Phelps | Spindle reconditioning system |
CN114536206A (zh) * | 2022-03-03 | 2022-05-27 | 先导薄膜材料(广东)有限公司 | 一种旋转靶材表面研磨方法 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1843301A (en) * | 1929-09-28 | 1932-02-02 | Norton Co | Cam lapping machine |
DE678981C (de) * | 1936-10-28 | 1939-07-26 | Friedrich Deckel Praez S Mecha | Verfahren zum Schleifen von Nockenwellen |
US2209538A (en) * | 1937-07-30 | 1940-07-30 | Porsche Kg | Means and method for producing cams |
US4197679A (en) * | 1977-04-15 | 1980-04-15 | Ito & Okamoto, Esq. | Method for controlling the rotational speed of a rotary body |
DE3435313C2 (de) * | 1984-03-15 | 1986-10-02 | Erwin 7611 Nordrach Junker | Vorrichtung zum Außenrundschleifen |
DE3724698A1 (de) * | 1987-07-25 | 1989-02-02 | Schaudt Maschinenbau Gmbh | Schleifkopf |
JPH02218547A (ja) * | 1989-02-20 | 1990-08-31 | Nippei Toyama Corp | カム研削盤 |
HU209638B (en) * | 1989-10-27 | 1994-09-28 | Miskolci Egyetem | Method and apparatus for generating machining with abrasive belt |
DE4137924C2 (de) * | 1991-11-18 | 1997-12-04 | Schaudt Maschinenbau Gmbh | Verfahren und Vorrichtung zum numerisch gesteuerten Schleifen von Nocken einer Nockenwelle |
JP2930462B2 (ja) * | 1991-12-26 | 1999-08-03 | 豊田工機株式会社 | 研削方法 |
US5655952A (en) * | 1992-07-31 | 1997-08-12 | Ernst Thielenhaus Kg | System for honing camshaft cams |
DE19516711A1 (de) * | 1995-05-06 | 1996-11-07 | Schaudt Maschinenbau Gmbh | Werkzeugmaschine mit zwei Arbeitsspindeln |
-
1994
- 1994-07-26 DE DE4426452A patent/DE4426452C1/de not_active Expired - Lifetime
-
1995
- 1995-06-26 CN CN95194313A patent/CN1077001C/zh not_active Expired - Fee Related
- 1995-06-26 KR KR1019970700155A patent/KR100373116B1/ko not_active IP Right Cessation
- 1995-06-26 EP EP95924942A patent/EP0772509B1/de not_active Expired - Lifetime
- 1995-06-26 RU RU97102728A patent/RU2138384C1/ru not_active IP Right Cessation
- 1995-06-26 ES ES95924942T patent/ES2139910T3/es not_active Expired - Lifetime
- 1995-06-26 US US08/776,624 patent/US5899797A/en not_active Expired - Lifetime
- 1995-06-26 GE GEAP19953547A patent/GEP20002083B/en unknown
- 1995-06-26 UA UA97020483A patent/UA39978C2/uk unknown
- 1995-06-26 BR BR9508336A patent/BR9508336A/pt not_active IP Right Cessation
- 1995-06-26 CA CA002192988A patent/CA2192988A1/en not_active Abandoned
- 1995-06-26 DE DE59507256T patent/DE59507256D1/de not_active Expired - Lifetime
- 1995-06-26 JP JP8505389A patent/JPH10502878A/ja active Pending
- 1995-06-26 WO PCT/EP1995/002490 patent/WO1996003257A1/de active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO9603257A1 * |
Also Published As
Publication number | Publication date |
---|---|
JPH10502878A (ja) | 1998-03-17 |
US5899797A (en) | 1999-05-04 |
CA2192988A1 (en) | 1996-02-08 |
CN1077001C (zh) | 2002-01-02 |
DE59507256D1 (de) | 1999-12-23 |
RU2138384C1 (ru) | 1999-09-27 |
BR9508336A (pt) | 1997-12-23 |
WO1996003257A1 (de) | 1996-02-08 |
CN1154672A (zh) | 1997-07-16 |
UA39978C2 (uk) | 2001-07-16 |
ES2139910T3 (es) | 2000-02-16 |
DE4426452C1 (de) | 1995-09-07 |
GEP20002083B (en) | 2000-05-10 |
KR100373116B1 (ko) | 2003-05-12 |
EP0772509B1 (de) | 1999-11-17 |
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