EP0176723B1 - Meuleuse - Google Patents

Meuleuse Download PDF

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Publication number
EP0176723B1
EP0176723B1 EP85110295A EP85110295A EP0176723B1 EP 0176723 B1 EP0176723 B1 EP 0176723B1 EP 85110295 A EP85110295 A EP 85110295A EP 85110295 A EP85110295 A EP 85110295A EP 0176723 B1 EP0176723 B1 EP 0176723B1
Authority
EP
European Patent Office
Prior art keywords
machine according
grinding machine
grinding
guide
carriage
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.)
Expired - Lifetime
Application number
EP85110295A
Other languages
German (de)
English (en)
Other versions
EP0176723A2 (fr
EP0176723A3 (en
Inventor
Hans Dipl.-Ing. Grimm
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.)
Maschinenfabrik Gehring GmbH and Co KG
Original Assignee
Maschinenfabrik Gehring GmbH and 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 Maschinenfabrik Gehring GmbH and Co KG filed Critical Maschinenfabrik Gehring GmbH and Co KG
Publication of EP0176723A2 publication Critical patent/EP0176723A2/fr
Publication of EP0176723A3 publication Critical patent/EP0176723A3/de
Application granted granted Critical
Publication of EP0176723B1 publication Critical patent/EP0176723B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B24B5/06—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
    • B24B5/10—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 involving a horizontal tool spindle

Definitions

  • the invention relates to a grinding machine according to the preamble of patent claim 1.
  • a grinding machine of this type is known from DE-A-26 47 448.
  • the guides on both sides of the grinding spindle unit are in this machine two guide rods designed as round rods, which are connected at their ends to frame parts in such a way that they can be rotated about their longitudinal axis in a fixed arrangement.
  • the grinding spindle unit can therefore only be advanced in a certain direction to the workpiece headstock. For the exact alignment of the workpiece to the tool, only the workpiece headstock can be swiveled and laterally adjusted, for which special guides are required.
  • a machine tool for machining namely a lathe
  • two round columns are arranged on opposite sides of the workpiece headstock, on which the tool slide is guided.
  • the two round columns are connected by end cross members to form a rigid frame which can be pivoted about a pivot.
  • two threaded bolts supported on the machine frame are provided, each of which engages the one transverse part in the area of one of the two round columns.
  • a grinding machine for internal grinding of races in which the workpiece headstock is displaceably and pivotably mounted on a cylindrical slideway in order to bring the cylindrical inner surface of the workpiece into engagement with the tool located on the grinding spindle unit .
  • the grinding spindle unit is supported on a pivotable base plate by means of a ball-bearing slide, so that the grinding tool can be advanced against the conical workpiece inner surface in the inclined position set by the base plate.
  • the slide must be moved in the direction of the tool spindle axis and perpendicular to it.
  • the workpiece headstock is moved along the slideway in the direction of the then fixed and horizontally oriented grinding spindle unit and swiveled around the slideway, and the workpiece is also adjusted transversely to its bore axis by means of a pneumatic pressure device.
  • This delivery requires complicated construction and control.
  • the invention has for its object to design the grinding machine in a structurally simple manner so that the axes of the tool spindle and the workpiece spindle are exactly aligned with each other and this alignment can be corrected to avoid machining errors on the workpiece.
  • machining errors are to be eliminated that can essentially arise from uneven abrasive abrasion on the tool.
  • This arrangement makes it possible to precisely align the grinding spindle axis relative to the workpiece axis by pivoting one guide and to adjust its angular position in the event of uneven abrasive wear.
  • the infeed of the tool is simplified because the grinding spindle can be adjusted and adjusted in its height by moving the sliding guide by pivoting the other guide or both guides.
  • the readjustment of the angular and the vertical position of the grinding spindle axis can be controlled by means of separate adjusting devices, each associated with one of the two guides, so that position corrections of the tool are also possible automatically as a function of measured values of the bore dimensions.
  • the grinding machine shown is preferably used to machine workpieces with cylindrical inner bores.
  • a headstock 2 is arranged on a machine bed 1, in which a chuck 4 for a workpiece 3 is rotatably mounted.
  • the cylindrical inner bore 6 of the workpiece 3 in the exemplary embodiment is machined with a grinding tool 7.
  • the grinding tool 7 is driven at high speed by a grinding spindle unit 5, which is screwed onto a slide 8.
  • the carriage 8 is driven axially displaceably in the direction of the double arrow P. It is displaceably mounted on its longitudinal sides parallel to the direction of displacement, each on a guide 9 or 10.
  • the guide 9 is a circular guide with a round rod 11.
  • the opposite guide 10 is a roller guide with rollers 16 and 17 arranged one above the other.
  • the round rod 11 is supported at one end by means of a bearing block 31 on the machine bed 1 (FIG. 1). On it the slide 8 is guided axially displaceably with slide bearing bushes 12. To protect the guideway, the round rod 11 is surrounded in front of and behind the carriage 8 by my bellows 13. On the opposite roller guide 10, the carriage 8 is guided by means of a guide rail 14 which is fastened to a vertically upward edge section 8a of the carriage with screws so that it projects laterally and in the direction of the headstock 2 (FIGS. 1 and 2) .
  • the guide rail 14 With its laterally projecting section 14a, the guide rail 14 lies between the vertically superimposed rollers 16 and 17, which are designed as support rollers with a spherical running surface.
  • the support rollers are mounted on a support arm 15 of the roller guide 10 which is parallel to the round rod 11 of the round guide 9 and has approximately the same length.
  • the upper support roller 16 is pressed by a spring 44 against the guide rail 14 (FIG. 2) in order to ensure play-free guidance.
  • the support roller 16 is mounted on a bracket 45 which is pivotally attached to a vertical plate 46 which is fixedly connected to the support arm 15.
  • the spring 44 is supported on a horizontal cross plate 47 which is screwed onto the upper end face of the plate 46.
  • the carriage 8 is driven by a piston-cylinder unit 18 (FIGS. 1 and 3) and an oscillating drive 19 connected to it, which is formed by an eccentric drive.
  • the arrangement is such that the grinding tool 7 can be moved in and out of the bore 6 of the workpiece 3 by the piston-cylinder unit 18 in a known manner and then oscillating in the direction of the double arrow P via the eccentric drive 19 within the bore 6 is movable.
  • the eccentric drive 19, which is adjustable on a carrier plate 20 on the machine bed, essentially consists of an eccentric shaft 21, the axis of which extends transversely to the grinding spindle axis 29 and which is driven by a motor 22, e.g. an oil motor that is driven in rotation.
  • the eccentric shaft 21 forms a bearing pin for a bearing eye 23 of the piston-cylinder unit 18.
  • the unit 18 passes through an opening 18b (FIG. 3) of a vertical partition or support wall 28 of the machine bed 1 with play.
  • a ball screw known per se can also be used, which is driven by a servo motor (NC axis) which is controlled by an angle encoder. It is particularly expedient if the ball screw drive is connected directly to the carriage 8. In such an arrangement, the grinding tool is moved in and out of the bore 6 of the workpiece by the ball screw drive and moved oscillating within the bore in the direction of the double arrow P.
  • NC axis servo motor
  • the piston rod 18a of the piston-cylinder unit 18 is connected in an articulated manner to the slide 8 by means of its end bearing eye 24, which lies between two eyes 24a and 24b attached to the slide and is penetrated by a hinge pin 24c engaging in the eyes (FIGS. 1 and 2).
  • the grinding tool 7 can be adjusted in the longitudinal direction by pivoting the carrier plate 20.
  • the carrier plate 20 is pivotally mounted with a bolt 25 between two blocks 26 fixedly arranged on the machine bed 1 and is held with an adjusting screw 27 which is articulated on the partition wall 28.
  • the adjusting screw 27 lies in a top view (FIG. 1) next to and in a side view (FIG. 3) above the piston-cylinder unit 18 and with its bearing eyelet 27a between two brackets 28a and 28b fastened to the partition wall 28, to which they are attached with a Bearing pin 28c is articulated.
  • the adjusting screw 27 is adjustably mounted on the carrier plate 20 with a spindle nut 27b.
  • the round guide 9 is adjustably mounted and driven.
  • the round rod 11 is mounted at its one end on the bearing block 31 fastened on the machine bed 1 so as to be pivotable about a horizontal pivot axis 32 lying transversely to the grinding spindle axis 29.
  • the round rod 11 is held by an adjusting device 33, which is fastened to the partition wall 28. With the adjusting device 33, the round rod 11 can be pivoted about the pivot axis 32 in the vertical direction, so that the carriage 8 is to be aligned obliquely to the horizontal plane.
  • the adjusting device 33 contains an eccentric shaft 35 which engages with play in a bearing bore 34 of the round rod 11 and is driven by a servo or stepper motor 38 via a drive connection 37, for example a gear transmission.
  • a drive connection 37 for example a gear transmission.
  • any other suitable adjustment device e.g. a numerically controlled ball screw drive (NC axis), can be used.
  • the roller guide 10 (FIGS. 1 and 2) running in a horizontal plane parallel to the round guide 9 is also vertically adjustable via the support arm 15.
  • the support arm 15 is with its headstock 2 adjacent end in the same way as the round rod 11 mounted in a bearing block 39 fastened to the machine bed 1 and held at the other end by an adjusting device 40 which is driven by a servo or stepper motor 42.
  • the support arm 15 can therefore be pivoted in height about a pivot axis 41 lying transversely to the grinding spindle axis 29 in the bearing block 39.
  • the adjusting device 40 and the motor 42 like the adjusting device 33 and the motor 38, are mounted on the partition wall 28 or also directly on the machine bed 1.
  • the circular guide 9 and the roller guide 10 are arranged at the lateral distance from the grinding spindle axis 29 shown in FIG. 2 such that the grinding tool 7 in engagement within the bore 6 extends in plan view on both sides of a vertical plane E o , which is centered between two for the direction of displacement P perpendicular vertical planes e 1 and e 2 is located (Fig. 1), wherein the vertical plane e 1 E2 the pivot axis 32 includes the point of contact of the supporting roller 17 with the guide rail 14 and the vertical plane of the round bar 11.
  • the round rod 11 is pivoted about the axis 32 by means of the adjusting device 33, only the direction of the grinding spindle axis 29 is changed, but not its height relative to the workpiece axis 30 in the vertical center plane E o .
  • the height of the grinding tool can then only be adjusted or adjusted by infeed by means of the support arm 15, which is pivoted about the axis 41 via the adjusting device 40 and thus adjusts the height of the roller guide 10, the slide 8 pivoting only about the round rod 11 .
  • the slide 8 pivots about the axis 32 and also about the longitudinal axis of the round rod 11, so that in the central plane E o the height difference on the side of the round rod 11 to the horizontal plane of the workpiece axis 30 on the side of the roller guide 10 results in an equal height difference in the opposite direction and thus the height of the intersection of the workpiece axis 30 with the central plane E o remains unchanged.
  • the conditions described in the position of the grinding tool in engagement relative to the round guide 9 and to the roller guide 10 can also be chosen differently, such that when the round guide 9 is adjusted by means of the adjusting device 33, in addition to a change in the direction of the grinding tool axis, a change in it Elevation occurs relative to the workpiece axis within the workpiece bore 6.
  • the height adjustment of the grinding tool axis can be compensated for by adjusting the roller guide 10 by means of the adjusting device 40, and the adjustment to the dimension desired for the infeed of the grinding tool can be corrected.
  • the guides 9 and 10 are expediently pivoted in a measurement-controlled manner so that the grinding spindle axis 29 can be adjusted automatically.
  • the deviation of the workpiece bore 6 from the target shape, for example the cylindrical shape, and from the desired target dimension is measured with a measuring device (not shown) known per se, the bore being able to be measured during grinding or during work breaks or after grinding .
  • the measured values are suitably fed to an electronic evaluation and arithmetic unit (not shown) which controls the servo or stepper motors 38 and 42 accordingly, which adjust the guides 9 and 10 via the adjusting devices 33 and 40 until the desired target dimension is reached.
  • the evaluation and arithmetic unit issues a signal, which ends the grinding process.
  • the grinding process can be automatically controlled by a device that indirectly measures the grinding force.
  • the deflection of the support arm 15 caused by the contact force of the slide 8 via the support roller 17 is measured by means of a suitable sensor, in the exemplary embodiment by means of a strain gauge 43.
  • This deflection is a measure of the degree of wear of the tool 7.
  • the strain gauge 43 should be arranged on the underside of the support arm 15 at the location of the greatest deflection, namely adjacent to the support roller 17.
  • the continuously measured values become known per se (not shown) ) supplied electronic computing and control device.
  • the measured values are evaluated to calculate the adjustment of the guides 9 and 10, which are thus adjusted taking into account the wear of the tool 7.
  • the computing and control device the grinding process is controlled so that it runs optimally and dressing processes on the grinding tool 7 are further reduced.

Landscapes

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

Claims (25)

1. Meuleuse pour l'usinage de surfaces intérieures, en particulier d'alésages cylindriques intérieurs de pièces à usiner, comprenant un bâti de machine (1), au moins une poupée porte-pièce (2) et un chariot (8) portant une unité de broche porte-meule (5) et guidée de manière mobile sur le bâti de machine (1) au moyen de guidages (9 et 10) placés sur des côtés opposés de l'unité de broche porte-meule (5), caractérisé en ce que les guidages (9 et 10) peuvent être pivotés chacun par un dispositif de réglage particulier (33; 40) et indépendamment l'un de l'autre autour d'un axe sensiblement horizontal (32; 41) orienté transversalement à t'axe (29) de la broche porte-meule.
2. Meuleuse selon la revendication 1, caractérisée en ce que l'un des guidages (9) est un guidage circulaire qui comprend une barre ronde (11) parallèle à l'axe (29) de la broche porte-meule, sur laquelle le chariot (8) portant l'unité de broche porte-meule (5) est monté de façon mobile et pivotante; et que l'autre guidage (10) est un guidage à rouleaux avec des rouleaux (16 et 17) superposés entre lesquels est disposé un rail-guide (14) du chariot (8).
3. Meuleuse selon la revendication 2, caractérisée en ce que le rail-guide (14) s'étend parallèlement à l'axe (29) de la broche porte-meule.
4. Meuleuse selon l'une des revendications 2 ou 3, caractérisée en ce que les rouleaux (16 et 17) sont deux rouleaux d'appui avec surface d'appui bombée placés verticalement l'un au-dessus de l'autre.
5. Meuleuse selon l'une des revendications 2 à 4, caractérisée en ce que les rouleaux (16 et 17) sont montés sur un bras de support (15) lequel est raccordé au bâti de machine (1) de façon à pouvoir tourner autour de l'axe de pivotement (41) du guidage à rouleaux (10).
6. Meuleuse selon la revendication 5, caractérisée en ce que le bras de support (15) prend appui sur un palier (39) fixé sur le bâti de machine (1) de manière à pouvoir tourner autour de l'axe de pivotement (41).
7. Meuleuse selon l'une des revendications 5 ou 6, caractérisée en ce que l'extrémité du bras de support (15) située en face de l'axe de pivotement (41) par rapport au guidage à rouleaux (10) est reliée au dispositif de réglage associée (40).
8. Meuleuse selon la revendication 7, caractérisée en ce que le bras de support (15) est monté sur un arbre d'excentrique qui fait partie du dispositif de réglage (40) et qui est entraîné par un servomoteur ou un moteur pas à pas (42).
9. Meuleuse selon la revendication 7, caractérisée en ce que le bras de support (15) est relié à une vis à billes à commande numérique du dispositif de réglage (40).
10. Meuleuse selon l'une des revendications 2 à 9, caractérisée en ce que le rouleau supérieur (16) du guidage à rouleaux (10) est commandé par ressort en direction du rail-guide (14) du chariot.
11. Meuleuse selon la revendication 10, caractérisée en ce que le rouleau supérieur (16) est monté sur une attache (45) qui est reliée de manière pivotante à une plaque (46) fixée sur le bras de support (15) et sur laquelle il prend appui au moyen d'un ressort (44).
12. Meuleuse selon l'une des revendications 1 à 11, caractérisée en ce que le chariot (8) portant l'unité de broche porte-meule (5) est entraîné de manière oscillante dans le sens de l'axe (29) de la broche porte-meule.
13. Meuleuse selon la revendication 12, caractérisée en ce qu'elle comprend pour l'entraînement du chariot une commande à excentrique (19).
14. Meuleuse selon la revendication 12, caractérisée en ce qu'elle comprend pour l'entraînement du chariot une vis à billes à commande numérique.
15. Meuleuse selon l'une des revendications 12 à 14, caractérisée en ce que le chariot (8) est relié à son mécanisme d'entraînement (19) par l'intermédiaire d'un système de piston-cylindre (18).
16. Meuleuse selon l'une des revendications 12 à 15, caractérisée en ce que l'entraînement oscillant (19) s'appuie sur une plaque de support (20) raccordée de manière pivotante au bâti de machine (1) et dont l'inclinaison peut être réglée au moyen d'un organe de réglage, de préférence d'une vis de réglage (27).
17. Meuleuse selon l'une des revendications 2 à 16, caractérisée en ce que la barre ronde (11) du guidage circulaire (9) est articulée avec son extrémité dirigée vers la poupée fixe (2) sur l'axe de pivotement horizontal (32) associé au guidage circulaire (9) et fixée avec son autre extrémité sur le dispositif de réglage (33) associé.
18. Meuleuse selon l'une des revendications 2 à 17, caractérisée en ce que le dispositif de réglage (33) du guidage circulaire (9) comprend un arbre d'excentrique (35) qui est tentraîné par un servomoteur ou un moteur pas à pas (38).
19. Meuleuse selon l'une des revendications 2 à 17, caractérisée en ce que le dispositif de réglage pour le guidage circulaire (9) comprend une vis à billes à commande numérique.
20. Meuleuse selon l'une des revendications 1 à 19, caractérisée en ce que l'outil de rectification (7) de l'unité de broche porte-meule (5) se situe, dans sa position de contact avec la pièce à usiner (3), entre deux plans verticaux (Ei et E2) parallèles et perpendiculaires à l'axe (29) de la broche porte-meule, l'un des plans verticaux (Ei) contenant la ligne d'appui du chariot de l'un des guidages (10) et l'autre plan vertical (E2) contenant l'axe de pivotement (32) de l'autre guidage (9).
21. Meuleuse selon la revendication 20 et l'une des revendications 2 à 19, caractérisée en ce que la ligne d'appui du chariot de l'un des guidages (10) est constituée par la ligne de contact du rouleau inférieur (17) de ce guidage à rouleaux (10) avec le rail-guide (14) du chariot (8).
22. Meuleuse selon l'une des revendications 20 ou 21, caractérisée en ce que, dans sa position de contact avec la pièce à usiner (3), l'outil de rectification (7) se trouve à une distance telle des deux plans verticaux (E, et E2) et des deux guidages (9 et 10) que le pivotement de l'une des guidages (9) provoque uniquement un changement de sa position angulaire et le pivotement de l'autre guidage (10), uniquement une modification de sa position en hauteur par rapport à l'axe (30) de la pièce à usiner.
23. Meuleuse selon la revendication 22, caractérisée en ce que, dans sa position de contact avec la pièce à usiner (3), l'outil de rectification (7) se trouve sensiblement à égale distance des deux plans verticaux (E, et E2).
24. Meuleuse selon l'une des revendications 1 à 23, caractérisée en ce que les dispositifs de réglage (33 et 40) des deux guidages (9 et 10) sont commandés, par l'intermédiaire d'un régulateur, en fonction de valeurs de consigne et de valeurs effectives mesurées de la cote de l'alésage et/ou de la géométrie de l'alésage.
25. Meuleuse selon l'une des revendications 5 à 24, caractérisée en ce que les dispositifs de réglage (33 et 40) des deux guidages (9 et 10) sont commandés en fonction du fléchissement du bras de support (15) dans la région des rouleaux (16 et 17) dont les valeurs sont déterminées au moyen d'un capteur de mesure, de préférence d'une jauge extensométrique (43), disposé sur le bras de support et transmises à un régulateur électronique.
EP85110295A 1984-10-03 1985-08-17 Meuleuse Expired - Lifetime EP0176723B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843436226 DE3436226A1 (de) 1984-10-03 1984-10-03 Schleifmaschine
DE3436226 1984-10-03

Publications (3)

Publication Number Publication Date
EP0176723A2 EP0176723A2 (fr) 1986-04-09
EP0176723A3 EP0176723A3 (en) 1987-12-16
EP0176723B1 true EP0176723B1 (fr) 1990-10-31

Family

ID=6246974

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85110295A Expired - Lifetime EP0176723B1 (fr) 1984-10-03 1985-08-17 Meuleuse

Country Status (3)

Country Link
US (1) US4606150A (fr)
EP (1) EP0176723B1 (fr)
DE (1) DE3436226A1 (fr)

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US5119599A (en) * 1990-06-04 1992-06-09 Clipper Diamond Tool Co., Inc. Diamond dressing unit for grinding wheels
US5175964A (en) * 1991-07-26 1993-01-05 Girndt Richard J Method and apparatus for removing flaws from internal pipe walls
US5472367A (en) * 1993-10-07 1995-12-05 Omax Corporation Machine tool apparatus and linear motion track therefor
US5782674A (en) * 1996-05-28 1998-07-21 Hahn; Robert S. Sensors for internal grinding machines
GB9725203D0 (en) * 1997-11-29 1998-01-28 Unova Uk Ltd Improvements in and relating to grinding machines
US6015107A (en) * 1998-12-03 2000-01-18 Stegmeier; Bill Roller alignment system
SG97193A1 (en) * 2000-08-28 2003-07-18 Disco Corp Cutting machine
AT413802B (de) * 2004-01-30 2006-06-15 Wintersteiger Gmbh & Co Vorrichtung zum nachbearbeiten einer stahlkante eines skis
US8794288B2 (en) * 2008-08-21 2014-08-05 Vmi Holland B.V. Method for transferring and placing beads for tyres, device for carrying out such a method and spacer to be used in such a method and/or device
JP2013219200A (ja) * 2012-04-09 2013-10-24 Disco Abrasive Syst Ltd 切削装置
US8904912B2 (en) 2012-08-16 2014-12-09 Omax Corporation Control valves for waterjet systems and related devices, systems, and methods
US11554461B1 (en) 2018-02-13 2023-01-17 Omax Corporation Articulating apparatus of a waterjet system and related technology
WO2021202390A1 (fr) 2020-03-30 2021-10-07 Hypertherm, Inc. Cylindre pour pompe à jet de liquide à extrémités longitudinales d'interface multifonctionnelles

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US3345782A (en) * 1960-04-18 1967-10-10 Thompson Mfg Co Earl A Internal grinding machine
US3253368A (en) * 1963-10-08 1966-05-31 Pettibone Mulliken Corp Surface conditioning grinding machine
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FR2266575B1 (fr) * 1974-04-08 1976-12-17 Roulements Soc Nouvelle
US4114015A (en) * 1974-05-27 1978-09-12 Vladimir Sergeevich Vasiliev Electric discharge machine with a program copier and a tool support head carried by a longitudinally and transversely driven carriage
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US4241544A (en) * 1978-10-30 1980-12-30 Joseph Hampton Skate blade sharpener
US4363195A (en) * 1980-12-15 1982-12-14 Cincinnati Milacron - Heald Corp. Internal grinding machine with wedge feed mechanism

Also Published As

Publication number Publication date
EP0176723A2 (fr) 1986-04-09
EP0176723A3 (en) 1987-12-16
US4606150A (en) 1986-08-19
DE3436226A1 (de) 1986-04-03
DE3436226C2 (fr) 1989-10-05

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