EP0474586A1 - Procédé et dispositif de rectification cylindrique extérieur d'une pièce cylindrique - Google Patents

Procédé et dispositif de rectification cylindrique extérieur d'une pièce cylindrique Download PDF

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Publication number
EP0474586A1
EP0474586A1 EP91810564A EP91810564A EP0474586A1 EP 0474586 A1 EP0474586 A1 EP 0474586A1 EP 91810564 A EP91810564 A EP 91810564A EP 91810564 A EP91810564 A EP 91810564A EP 0474586 A1 EP0474586 A1 EP 0474586A1
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EP
European Patent Office
Prior art keywords
workpiece
grinding
wheel
regulating wheel
grinding 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.)
Withdrawn
Application number
EP91810564A
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German (de)
English (en)
Inventor
Stefan Brotschi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Agathon AG Maschinenfabrik
Original Assignee
Agathon AG Maschinenfabrik
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Agathon AG Maschinenfabrik filed Critical Agathon AG Maschinenfabrik
Publication of EP0474586A1 publication Critical patent/EP0474586A1/fr
Withdrawn legal-status Critical Current

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    • 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
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/18—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centreless means for supporting, guiding, floating or rotating work
    • 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
    • B24B5/18—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centreless means for supporting, guiding, floating or rotating work
    • B24B5/307—Means for supporting work

Definitions

  • the present invention relates to a method for external cylindrical grinding of a cylindrical workpiece according to the preamble of claim 1.
  • a device for performing the method is mentioned in claim 5.
  • the known external cylindrical grinding methods can be used.
  • the so-called longitudinal circumferential external cylindrical grinding the workpiece is held between the tips or clamped in a collet.
  • a rotating cylindrical grinding wheel is directed with its peripheral surface against the workpiece rotating in the opposite direction.
  • the material is removed by moving the grinding wheel in the axial direction of the workpiece.
  • the so-called longitudinal-side-external cylindrical grinding the workpiece is clamped in a collet and set in rotation.
  • the end face of the cylindrical or disc-shaped grinding wheel is directed towards the workpiece.
  • the workpiece is removed by moving the rotating grinding wheel in the axial direction of the workpiece.
  • the directions of rotation of the grinding wheel and the workpiece are perpendicular to each other.
  • German patent DE 38 17 453 discloses a device for peeling grinding a workpiece clamped between two tips.
  • This invention relates to a method and a device for external cylindrical grinding of workpieces, wherein a first lateral surface of a rotating grinding wheel running at an angle to the longitudinal axis of the workpiece provides for a main removal on the workpiece during a feed in the direction of the longitudinal axis of the workpiece and one parallel to the longitudinal axis of the workpiece running, following the first lateral surface, substantially narrower second lateral surface is used for grinding to a final dimension.
  • the advantage of peeling grinding is that it achieves a high rate of chip removal.
  • a disadvantage of all of the aforementioned methods is the fact that, in the case of workpieces with large length-diameter ratios, there is a risk of the workpiece bending due to the forces acting radially to the workpiece. For example, with a workpiece clamped between centers, greater and greater bending moments occur the closer the grinding wheel approaches the center of the workpiece. In the case of a workpiece clamped in a collet, the greater the distance from the collet, the greater the risk of it bending. The maximum possible amount of chip removal that can be removed must be adapted to the workpiece.
  • the grinding of concentric pins on cylindrical workpieces has also been carried out on centerless cylindrical grinding machines.
  • the grinding wheel has been laterally offset from the regulating wheel.
  • a pressure roller which is used to hold the workpiece on a support ruler and to press the former against the control wheel, has been arranged opposite the control wheel.
  • the concentric pin has been ground by slowly advancing the grinding wheel in the radial direction of the workpiece.
  • the maximum pin length and the minimum pin diameter are limited due to the radial forces that occur.
  • a further disadvantage of this method is that the grinding wheel must be at least as wide as the pin to be ground and that the volume of chip removal is small compared to peeling grinding.
  • 1 shows the parts of a machine for centerless cylindrical grinding which are essential for carrying out the method according to the invention.
  • 1 with a cylindrical workpiece is designated, on which a concentric pin 14 is ground.
  • 2 with a grinding wheel is designated, which has a first lateral surface 3, which is intended for a main removal on the workpiece. Adjoining the first lateral surface, a second lateral surface 4 serving for grinding is arranged.
  • the first lateral surface 3 is closed by a front end face 10 and the second lateral surface 4 by a rear end face 11.
  • the grinding wheel is rotatably mounted on a longitudinal axis 17, which is only shown symbolically.
  • the first lateral surface 3 usually has a straight surface line (FIG. 2, 23) which is inclined with respect to the grinding wheel.
  • the amount of metal removal can be increased in the method according to the invention if, instead of the rectilinearly shaped surface line, the first surface area 3 has an approximately part-circular surface line (FIGS. 2, 23 ').
  • the second lateral surface 4 runs essentially parallel to the longitudinal axis 7 of the workpiece.
  • the grinding wheel 2 is usually adjusted in the radial direction in such a way that the final dimension of the pin 14 is reached in a single grinding process, as is customary for peeling grinding.
  • the regulating wheel is marked with 5. This is rotatably mounted on an axis 16, also shown only symbolically, and serves, among other things, to set the workpiece 1 in rotation.
  • the cylindrical regulating wheel has a peripheral surface 8 which is delimited by a front end surface 12 and a rear end surface 13.
  • the grinding wheel 2 arranged opposite the regulating wheel 5 in a centerless cylindrical grinding machine is offset sideways in relation to the regulating wheel 5 in order to carry out the method according to the invention. The size of the offset is selected so that in the example shown the front end face 10 of the grinding wheel 2 lies approximately in the area of the rear end face 13 of the regulating wheel 5.
  • the outer surfaces 3 and 4 of the grinding wheel 2 essentially connect to the peripheral surface 8 of the regulating wheel 5.
  • the workpiece 1 is placed on a workpiece support 6, which is adjustable at least in height in a manner not shown.
  • a pressure roller 9 is mounted opposite the regulating wheel 5, with which the workpiece 1 lying on the workpiece support 6 is pressed against the regulating wheel 5.
  • the workpiece 1 is also set in rotation by the rotating regulating wheel 5.
  • the pin 14, which is concentric with the workpiece 1, is preferably produced by a single grinding process in that the workpiece 1 is pushed in the direction of its longitudinal axis 7 (arrow) against the rotating grinding wheel 2. The generation of the feed is described in more detail below.
  • the workpiece 1 can be advanced against the grinding wheel 2 as far as its mounting on the workpiece support 6 and between the regulating wheel 5 and the pressure roller 9 is ensured. It is therefore expedient to provide a sensing element 15 in the region of the end face 12 of the regulating wheel 5 facing away from the grinding wheel 2 in order to be able to determine when the workpiece end reaches the area of the regulating wheel 5. With the feeler 15, a signal can be generated which is intended to interrupt the grinding process. There are various ways of forming the feeler 15. One would be to use a light barrier, for example.
  • a pneumatic element as a sensing element that responds to the pressure. If the pneumatic element 15 is arranged near the surface of the workpiece 1, a dynamic pressure arises in it if, for example, air is continuously blown out in the case of an indicated nozzle. This dynamic pressure decreases as soon as the surface of the workpiece 1 is no longer in front of the pneumatic element. The pressure drop can be evaluated and communicated to a control device, not shown.
  • FIG. 2 shows a top view of the arrangement shown in FIG. 1, wherein both the grinding wheel 2 and the regulating wheel 5 are only drawn in half, ie up to their longitudinal axes 17 and 16, respectively.
  • the regulating wheel axis 16, the grinding wheel axis 17 and the axis 20 of the pressure roller 9 run parallel to the longitudinal axis 7 of the workpiece 1.
  • 23 shows the surface line of the first outer surface of the grinding wheel 2, which extends in a straight line and at an angle to the longitudinal axis 7 of the workpiece. Dashed with 23 'is, as previously mentioned, a particularly advantageous embodiment of a surface line for the first outer surface 3 of the grinding wheel 2 is shown. With such an approximately partially circular mat line 23 ', particularly high chip removal volumes can be realized.
  • FIG. 3 and 4 symbolically show how the feed of the workpiece 1 can be realized.
  • this is done in that the longitudinal axis 16 of the regulating wheel 5 is inclined in the vertical direction by an angle 19 of approximately 0.5 to 3 °.
  • the regulating wheel 5 then rotates about an axis of rotation 16 'inclined in the vertical direction with respect to the longitudinal axis 7 of the workpiece 1 by the aforementioned angle.
  • the direction of rotation of the regulating wheel is marked with 18.
  • the pressure roller 9 is inclined in the vertical direction by an angle 21 of likewise 0.5 to 3 ° relative to the pressure roller axis 20 parallel to the longitudinal axis 7 of the workpiece. The pressure roller 9 then rotates about an axis 20 'deflected in the vertical direction.
  • the axial feed rate of the workpiece is determined by the size of the angle of inclination 19 of the regulating wheel 5 or 21 of the pressure roller 9 and by the speed of the regulating wheel 5.
  • 5 and 6 show schematic representations of grinding devices which have been listed in the introduction to the description as belonging to the prior art.
  • 5 shows the so-called longitudinal-side external cylindrical grinding according to DIN 8589.
  • a Workpiece 26, to which a concentric pin 28 is to be ground on one side, is held in a collet on its other side.
  • a grinding wheel 27, which rotates at right angles to the longitudinal axis of the workpiece, is advanced in the direction of the indicated arrow against the rotating workpiece 26.
  • 30 shows a free length between the clamping point of the workpiece 26 and the grinding wheel application point.
  • the abovementioned forces acting on the workpiece 26 as a result of the grinding process are essentially dependent on the feed speed of the grinding wheel and on the amount of grinding abrasion. From what has been said it follows that, depending on the workpiece dimensions, it is not possible to work with a maximum chip removal volume. The accuracy, the length and the minimum diameter of the concentric pin are also limited.
  • a concentric pin 36 is to be ground on a workpiece 34 which is rotatably clamped between two tips 32.
  • the grinding wheel axis of rotation runs parallel to the longitudinal axis of the workpiece.
  • the rotating grinding wheel is advanced in the direction of the tip 32 starting from the workpiece end mounted at the tip 33.
  • Radial and axial forces act on the workpiece. Mainly due to the radial forces in the workpiece 34 generates a bending moment. This is greater the closer the grinding wheel 35 approaches the center of the workpiece.
  • the workpiece tends to sag. It can also be seen from this figure that the grinding of concentric pins is essentially dependent on the dimensions of the workpiece and the pin to be produced, the feed speed of the grinding wheel and the amount of grinding abrasion.
  • FIGS. 7 and 8 The advantages of the method according to the invention can be clearly seen from FIGS. 7 and 8 compared to what has just been said.
  • a designated with 40 exist between the grinding wheel 2 and the regulating wheel 5 remains constant during the entire grinding process.
  • the length of a pin 14, 14 'to be ground is practically limited only by the length of the workpiece 1.
  • this can be selected so that it can still be pushed against the grinding wheel to the desired extent by the feed means, be it the regulating wheel 5 or the pressure roller 9. It would also be conceivable, although not shown in the figures, to support the feed by means of a feed means which faces away from the pin 14, 14 'to be ground End of the workpiece 1 would act.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
EP91810564A 1990-07-25 1991-07-12 Procédé et dispositif de rectification cylindrique extérieur d'une pièce cylindrique Withdrawn EP0474586A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2472/90 1990-07-25
CH2472/90A CH682380A5 (de) 1990-07-25 1990-07-25 Verfahren und Vorrichtung zum Aussenrundschleifen eines zylindrischen Werkstückes.

Publications (1)

Publication Number Publication Date
EP0474586A1 true EP0474586A1 (fr) 1992-03-11

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP91810564A Withdrawn EP0474586A1 (fr) 1990-07-25 1991-07-12 Procédé et dispositif de rectification cylindrique extérieur d'une pièce cylindrique

Country Status (3)

Country Link
EP (1) EP0474586A1 (fr)
JP (1) JPH0747259B2 (fr)
CH (1) CH682380A5 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0640435A1 (fr) * 1993-08-24 1995-03-01 Rollomatic S.A. Machine à meuler
EP1060832A1 (fr) * 1999-06-16 2000-12-20 Stefan Brotschi Schleiftechnik Procédé et dispositif pour supporter des pièces en rectification coaxiale
CN100450712C (zh) * 2006-12-28 2009-01-14 潘旭华 一种细长轴的磨削方法
CN102085626B (zh) * 2009-12-03 2012-09-05 上海莱必泰数控机床股份有限公司 无心磨床中心架升降连续可调机构
CN105121091A (zh) * 2013-02-15 2015-12-02 埃尔温容克尔研磨技术股份公司 用于高精度无心磨削具有高表面品质的轴部件的方法和磨削工具
CN110125847A (zh) * 2019-06-28 2019-08-16 范梅伦 一种自定心夹具
CN110802448A (zh) * 2019-11-02 2020-02-18 姚仿英 一种钨钢棒材的外圆打磨设备及其防跳动方法

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3984804B2 (ja) * 2001-07-17 2007-10-03 光洋機械工業株式会社 棒状工作物のセンタレス研削方法およびセンタレス研削装置
US7340957B2 (en) 2004-07-29 2008-03-11 Los Alamos National Security, Llc Ultrasonic analyte concentration and application in flow cytometry
JP4718298B2 (ja) * 2005-10-24 2011-07-06 光洋機械工業株式会社 棒状工作物のセンタレス研削方法およびセンタレス研削装置
KR20070062381A (ko) * 2005-12-12 2007-06-15 이정민 이종물질을 수용한 배출장치의 스커트 구조
US8266951B2 (en) 2007-12-19 2012-09-18 Los Alamos National Security, Llc Particle analysis in an acoustic cytometer

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE555938A (fr) * 1956-07-30
US1659220A (en) * 1926-04-28 1928-02-14 Cincinnati Grinders Inc Centerless grinding
US2411972A (en) * 1945-03-10 1946-12-03 Melin William Centerless grinding machine
WO1989005711A1 (fr) * 1987-12-23 1989-06-29 Fortuna-Werke Maschinenfabrik Gmbh Procede de taillage de meules

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5930652A (ja) * 1982-08-05 1984-02-18 Matsushita Electric Works Ltd センタ−レス研削装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1659220A (en) * 1926-04-28 1928-02-14 Cincinnati Grinders Inc Centerless grinding
US2411972A (en) * 1945-03-10 1946-12-03 Melin William Centerless grinding machine
BE555938A (fr) * 1956-07-30
WO1989005711A1 (fr) * 1987-12-23 1989-06-29 Fortuna-Werke Maschinenfabrik Gmbh Procede de taillage de meules

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 8, no. 128 (M-302)(1565) 14. Juni 1984 & JP-A-59 030 652 ( MATSUSHITA DENKO K.K. ) 18. Februar 1984 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0640435A1 (fr) * 1993-08-24 1995-03-01 Rollomatic S.A. Machine à meuler
CH689350A5 (fr) * 1993-08-24 1999-03-15 Rollomatic Sa Machine à meuler.
EP1060832A1 (fr) * 1999-06-16 2000-12-20 Stefan Brotschi Schleiftechnik Procédé et dispositif pour supporter des pièces en rectification coaxiale
CN100450712C (zh) * 2006-12-28 2009-01-14 潘旭华 一种细长轴的磨削方法
CN102085626B (zh) * 2009-12-03 2012-09-05 上海莱必泰数控机床股份有限公司 无心磨床中心架升降连续可调机构
CN105121091A (zh) * 2013-02-15 2015-12-02 埃尔温容克尔研磨技术股份公司 用于高精度无心磨削具有高表面品质的轴部件的方法和磨削工具
CN110125847A (zh) * 2019-06-28 2019-08-16 范梅伦 一种自定心夹具
CN110802448A (zh) * 2019-11-02 2020-02-18 姚仿英 一种钨钢棒材的外圆打磨设备及其防跳动方法

Also Published As

Publication number Publication date
JPH0584649A (ja) 1993-04-06
JPH0747259B2 (ja) 1995-05-24
CH682380A5 (de) 1993-09-15

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