WO2022199743A1 - Appareil et procédé pour positionner des pièces à travailler pour un meulage sans centre en enfilade - Google Patents

Appareil et procédé pour positionner des pièces à travailler pour un meulage sans centre en enfilade Download PDF

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Publication number
WO2022199743A1
WO2022199743A1 PCT/DE2022/100154 DE2022100154W WO2022199743A1 WO 2022199743 A1 WO2022199743 A1 WO 2022199743A1 DE 2022100154 W DE2022100154 W DE 2022100154W WO 2022199743 A1 WO2022199743 A1 WO 2022199743A1
Authority
WO
WIPO (PCT)
Prior art keywords
workpiece
workpieces
guide jaws
grinding
guide
Prior art date
Application number
PCT/DE2022/100154
Other languages
German (de)
English (en)
Inventor
Stephan Woiwode
Thorsten Roth
Daniel Weber
Original Assignee
Schaeffler Technologies AG & Co. KG
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 Schaeffler Technologies AG & Co. KG filed Critical Schaeffler Technologies AG & Co. KG
Publication of WO2022199743A1 publication Critical patent/WO2022199743A1/fr

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
    • B24B5/18—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
    • 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
    • B24B5/06—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 internally
    • B24B5/065—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 internally for brake drums
    • 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
    • B24B5/22—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 for grinding cylindrical surfaces, e.g. on bolts

Definitions

  • the invention relates to a method for positioning workpieces during centerless through-feed grinding. Furthermore, the invention relates to a device suitable for carrying out such a positioning method.
  • WO 2018/162002 A1 discloses a loading device for a plunge-cut grinding machine for centerless external cylindrical grinding.
  • the well-known loading device comprises a receiving frame for receiving a raw workpiece to be machined and a support body, through which a support base for the raw workpiece is formed.
  • a displacement actuator can act on the receiving frame for axially displacing the receiving frame relative to the support body.
  • the receiving frame has, on an end face pointing in the axial direction, a conveying stop for conveying out an end workpiece arranged in the grinding gap.
  • a device described in DD 0154 886 A1 for automatically feeding and removing rotationally symmetrical workpieces on centerless external cylindrical grinding machines provides a workpiece changing position that is firmly arranged above the grinding gap.
  • the device according to DD 0154 886 A1 comprises a vertically movable slide which is arranged under the grinding gap and which lifts the finished part into a prismatic workpiece change position arranged above it.
  • a centerless grinding machine described in DE 1 402 590 B comprises a grinding wheel and a regulating wheel which rotates in the opposite direction and can be displaced in relation to one another. Furthermore, the centerless grinding machine includes a workpiece carrier disk that can be rotated step by step, which moves the workpieces from a transported to the grinding point between the grinding wheel and the regulating wheel and from there to a delivery station.
  • DE 860468 B discloses a device for centerless grinding of cylindrical surfaces, it being assumed that an arrangement has proven itself for external grinding, in which the workpiece is guided during grinding by a driving regulating wheel and a support ruler, which in principle is guided by a support roller is replaceable.
  • DE 860468 B proposes guiding and rotating the workpiece between three guide bodies arranged in a circle around the workpiece, with the guide bodies being held at a variable but essentially equal distance from the center of the guide system.
  • DE 479 068 A proposes the support of offset workpieces to be ground centerless by support pieces arranged below the workpiece and tapered on the support surface. Specifically, a steel ruler is proposed for supporting the workpiece, the position of which can be adjusted. Adjustable guide jaws that are under spring pressure can be arranged on both sides of a ruler.
  • the invention is based on the object of specifying options for positioning workpieces on the entry and/or exit side of a machine for centerless through-feed grinding that are more developed than the prior art and can be implemented efficiently, with the aim in particular of an uncomplicated conversion option to different workpiece diameters.
  • This object is achieved according to the invention by a device provided for positioning workpieces in centerless through-feed grinding with the features of claim 1.
  • the object is also achieved by a method for positioning workpieces according to claim 6. Configurations explained below in connection with the positioning method and advantages of the invention also apply mutatis mutandis to the positioning device, and vice versa.
  • the positioning device comprises two guide jaws flanking a support rail, which are arranged parallel to one another and can be displaced independently of one another in the same direction, typically vertically, while keeping their distance constant, with the guide jaws each having a section that is not aligned parallel to the direction of displacement, which section serves to support the workpiece is provided, so that a workpiece center axis can be displaced transversely to the direction of displacement by adjustments of the guide jaws taking place in the direction of displacement.
  • the workpieces are essentially conveyed horizontally in their longitudinal direction. Accordingly, the support rail is aligned horizontally, while the two guide jaws are arranged in an upright position on both sides next to the support rail.
  • the displacement direction of the guide jaws is vertical in this arrangement.
  • the guide jaws do not have to be adjusted transversely to the direction of movement to adapt to different workpiece diameters. Rather, a simply designed linear guide of each guide jaw is sufficient, which allows a height adjustment of the guide jaw.
  • the guide jaws can each have a section provided for supporting the workpiece that is straight in itself and positioned at an angle to the direction of displacement.
  • guide jaws can be used which each have a curved section intended for supporting the workpiece.
  • the curvatures can be designed in such a way that in the area of small workpiece diameters, a fleeting adjustment of a guide jaw by a certain amount leads to an adaptation to a workpiece diameter that has only changed slightly, whereas in the area of larger workpiece diameters, a fleeting adjustment of the guide jaw by the corresponding amount accompanied by a major change in the appropriate workpiece diameter.
  • the guide jaws each have a plurality of steps, which separate different sections provided for supporting the workpiece from one another. This configuration is particularly useful when workpieces in different diameter ranges are to be machined, with no overlaps between the diameter ranges.
  • the support rail which supports the workpieces, can have a contact surface which contacts the workpieces and which is inclined in an axial view.
  • the term axial here refers to the alignment of the rotationally symmetrical workpieces.
  • the support rail like the guide jaws, can be mechanically or motorized, in particular electronically controllable, adjustable.
  • the contact points between the workpieces on the one hand and the support rail and the guide jaws on the other hand can shift transversely to the conveying direction, i.e. to the axial direction of the workpieces, due to the changeover between different workpiece diameters.
  • the contact areas between the guide jaws and the workpieces can be reinforced to counteract wear.
  • the basic geometry of the guide jaws can be designed in such a way that the guide jaws can be used in a standard quick-release clamp within a mechanism for adjusting the flea.
  • Devices for positioning workpieces of basically the same design can be located at the inlet and/or outlet of a machine for centerless through-feed grinding.
  • FIG. 2 shows the device according to FIG. 1, adjusted to a different workpiece diameter
  • FIGS. 3 and 4 show different possibilities for positioning one and the same workpiece with the device according to FIG. 1,
  • FIG. 6 shows the device according to FIG. 5, adjusted to a larger workpiece diameter
  • 7 shows a further device for positioning workpieces, adjusted to a small workpiece diameter
  • FIG. 10 shows the arrangement according to FIG. 9 in a schematic plan view.
  • a device for positioning workpieces 2, identified overall by the reference numeral 1, is provided at the workpiece inlet 17 and workpiece outlet 18 of a grinding machine, which is only shown in outline in FIGS.
  • the grinding gap is denoted by 14.
  • the workpieces 2 to be ground are conveyed essentially in the horizontal direction (y-direction).
  • the axes of the grinding wheel 12 and the regulating wheel 13 aligned in the y-direction are denoted by W1, W2.
  • the positioning device 1 includes two guide jaws 3, 4, which are adjustable in the vertical adjustment direction VR (z-direction).
  • a support rail 7 can also be adjusted in the z-direction.
  • the to be processed, essentially Borrowed cylindrical workpieces 2 have different diameters di, d2.
  • the workpiece center axis is specified with MW.
  • the guide jaws 3, 4 have an inclined, curved or stepped section 5, 6 as the foremost section, that is to say the section lying furthest at the top.
  • the inclined position of the sections 5, 6 is reflected in angles ⁇ , ⁇ of more than 90° at the upper edge of the guide jaws 3, 4.
  • the workpiece 2 contacts the positioning device 1 in all cases at contact points 8, 9 on the guide jaws 3, 4 and at a contact point 10 on the support rail 7, with the latter contact point 10 being on an inclined surface, i.e. in relation to the x-y plane tilted plane, the Auflacytone 7 is located. Otherwise, the support rail 7 has a constant thickness. This also applies to the base sections, designated 11, of the guide jaws 3, 4, which are intended for attachment in a quick-action clamping device.
  • FIG. 1 shows the guidance of a relatively small workpiece 2 in the form of a section of pipe with an outer diameter di, and FIG. Of course, massive rotationally symmetrical components can also be machined in the same way.
  • the different setting of the guide jaws 3, 4 can be clearly seen in FIG.
  • the flea adjustment of the guide jaws 3, 4 and the support rail 7 takes place electromechanically with electronic control in the present case.
  • the positioning device 1 can also be used to vary the position of the workpiece center axis MW in the transverse direction, that is to say in the x-direction, as illustrated in FIGS.
  • the guide jaw 3 is moved upwards and at the same time the guide jaw 4 is moved downwards in order to shift the contact point 10 and thus the workpiece center axis MW to the right.
  • the workpiece center axis MW is therefore not always in a center plane, which is placed between the outer surfaces of the guide jaws 3, 4. In particular, this enables fine adjustment in the workpiece inlet 17, if necessary also in the workpiece outlet 18.
  • the exemplary embodiment according to FIGS. 5 and 6 differs from the exemplary embodiment according to FIGS. 1 to 4 in that the sections 5, 6 of the guide jaws 3, 4 are curved.
  • the workpiece 2 is in contact with the positioning device 1 at a total of three contact points 8 , 9 , 10 .
  • the term "contact points" refers to the sections shown in the figures. In fact, there are linear contact areas. Even small height adjustments of the guide jaws 3, 4 are sufficient to adapt the positioning device 1 to workpieces 2 of significantly different dimensions, as a comparison of FIGS. 5 and 6 shows.
  • each section 5, 6 of the guide jaws 3, 4 is formed from several, in the present case three, oblique sections 15, which are separated from one another by steps 16.
  • the sections 15 of each guide jaw 3, 4 are each in three mutually parallel planes.
  • the positioning device 1 according to Figure 7 behaves in the same way as the device 1 according to Figure 1, as long as the contact points 8, 9 in the area of the same oblique sections 15 stay.
  • the tooth structure of sections 5, 6 given in the case of FIG. given kidney device 1 in which case the distance a is kept constant over the entire adjustment range.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)

Abstract

Selon l'invention, un appareil pour positionner des pièces à travailler pour un meulage sans centre en enfilage comprend deux mâchoires de guidage (3, 4), qui encadrent un rail de support (7), sont disposées parallèlement l'une à l'autre et peuvent être déplacées indépendamment l'une de l'autre dans la même direction (VR), typiquement verticalement, tout en maintenant un espacement constant (a), les mâchoires de guidage (3, 4) comportant chacune une partie (5, 6) qui n'est pas orientée parallèlement à la direction de déplacement (VR) et sert à supporter la pièce à travailler, de sorte qu'un axe central de pièce à travailler (MW) puisse être décalé transversalement par rapport à la direction de déplacement (VR) par les mâchoires de guidage (3, 4) qui sont ajustées dans la direction de déplacement (VR).
PCT/DE2022/100154 2021-03-24 2022-02-25 Appareil et procédé pour positionner des pièces à travailler pour un meulage sans centre en enfilade WO2022199743A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021107362.6 2021-03-24
DE102021107362.6A DE102021107362A1 (de) 2021-03-24 2021-03-24 Vorrichtung und Verfahren zum Positionieren von Werkstücken beim spitzenlosen Durchlaufschleifen

Publications (1)

Publication Number Publication Date
WO2022199743A1 true WO2022199743A1 (fr) 2022-09-29

Family

ID=80735434

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2022/100154 WO2022199743A1 (fr) 2021-03-24 2022-02-25 Appareil et procédé pour positionner des pièces à travailler pour un meulage sans centre en enfilade

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DE (1) DE102021107362A1 (fr)
WO (1) WO2022199743A1 (fr)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD15486U (fr)
DE479068C (de) 1929-07-06 Wernhard Herminghausen Unterstuetzung spitzenlos zu schleifender, abgesetzter Werkstuecke
GB320912A (en) * 1928-04-26 1929-10-28 Karl Oskar Leon Improvements in and relating to centreless grinding apparatus
DE860468C (de) 1949-04-19 1953-02-05 Karl Berstecher Einrichtung zur spitzenlosen, spanabhebenden Herstellung zylindrischer Flaechen
DE1039400B (de) 1955-03-21 1958-09-18 Alfred Konrad Veith Dipl Ing Werkstueckauflage an spitzenlosen Schleifmaschinen
DE1402590B1 (de) 1959-01-02 1970-12-10 Bendix Corp Spitzenlose Schleifmaschine
JPH03117545A (ja) * 1989-09-27 1991-05-20 Koyo Mach Ind Co Ltd 心なし研削盤のワークガイド装置
EP1834729A1 (fr) * 2006-03-14 2007-09-19 Wenger Automation & Engineering AG Surcompresseur grande vitesse
DE10316956B4 (de) 2003-04-12 2008-04-03 Carsten Scheunchen Einlegevorrichtung für eine automatische Werkstückzuführung an einer Spitzenlos-Schleifmaschine
WO2018162002A1 (fr) 2017-03-08 2018-09-13 Schaeffler Technologies AG & Co. KG Dispositif de chargement pour une machine de rectification en plongée destinée à la rectification cylindrique externe sans pointe ainsi que procédé pour la rectification cylindrique externe sans pointe

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD154886A1 (de) 1980-12-01 1982-04-28 Thomas Koehler Vorrichtung zum automatischen zu-und abfuehren von werkstuecken
JPH0413075Y2 (fr) 1987-11-18 1992-03-27
KR100541774B1 (ko) 2004-07-28 2006-01-11 정희종 고무롤러의 피복제거장치

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD15486U (fr)
DE479068C (de) 1929-07-06 Wernhard Herminghausen Unterstuetzung spitzenlos zu schleifender, abgesetzter Werkstuecke
GB320912A (en) * 1928-04-26 1929-10-28 Karl Oskar Leon Improvements in and relating to centreless grinding apparatus
DE860468C (de) 1949-04-19 1953-02-05 Karl Berstecher Einrichtung zur spitzenlosen, spanabhebenden Herstellung zylindrischer Flaechen
DE1039400B (de) 1955-03-21 1958-09-18 Alfred Konrad Veith Dipl Ing Werkstueckauflage an spitzenlosen Schleifmaschinen
DE1402590B1 (de) 1959-01-02 1970-12-10 Bendix Corp Spitzenlose Schleifmaschine
JPH03117545A (ja) * 1989-09-27 1991-05-20 Koyo Mach Ind Co Ltd 心なし研削盤のワークガイド装置
DE10316956B4 (de) 2003-04-12 2008-04-03 Carsten Scheunchen Einlegevorrichtung für eine automatische Werkstückzuführung an einer Spitzenlos-Schleifmaschine
EP1834729A1 (fr) * 2006-03-14 2007-09-19 Wenger Automation & Engineering AG Surcompresseur grande vitesse
WO2018162002A1 (fr) 2017-03-08 2018-09-13 Schaeffler Technologies AG & Co. KG Dispositif de chargement pour une machine de rectification en plongée destinée à la rectification cylindrique externe sans pointe ainsi que procédé pour la rectification cylindrique externe sans pointe

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