EP0280483A1 - Dispositif de dressage - Google Patents

Dispositif de dressage Download PDF

Info

Publication number
EP0280483A1
EP0280483A1 EP88301460A EP88301460A EP0280483A1 EP 0280483 A1 EP0280483 A1 EP 0280483A1 EP 88301460 A EP88301460 A EP 88301460A EP 88301460 A EP88301460 A EP 88301460A EP 0280483 A1 EP0280483 A1 EP 0280483A1
Authority
EP
European Patent Office
Prior art keywords
dressing
grinding
unit
machine
tool assembly
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Withdrawn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
EP88301460A
Other languages
German (de)
English (en)
Inventor
Jeffrey Pratt
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.)
Jones & Shipman PLC
Original Assignee
Jones & Shipman PLC
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 Jones & Shipman PLC filed Critical Jones & Shipman PLC
Publication of EP0280483A1 publication Critical patent/EP0280483A1/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
    • B24B53/12—Dressing tools; Holders therefor

Definitions

  • the invention relates to a dressing unit and is particularly, but not exclusively, concerned with a dressing unit for dressing a grinding wheel on a grinding machine.
  • a grinding wheel usually made of aluminimum oxide, silicon carbide or boron nitrate, is subject to wear glazing and/or loading. These factors will either impair the grinding wheel's ability to grind a desired profile and/or its cutting efficiency.
  • the grinding wheel is dressed so as to restore the wheel profile and wheel surface condition.
  • the grinding wheel may be dressed to provide a fresh profile.
  • Wheel dressing on a surface grinding machine is normally effected using a diamond tipped dressing tool.
  • the dressing tool is mounted on a magnetic chuck of the surface grinding machine.
  • the dressing tool is removed from the magnetic chuck and usually stored in a tool cupboard.
  • a dressing jig is available which can be mounted at a fixed position adjacent one end of the machine table.
  • the jig consists of a plurality of fixed blocks to enable at least one dressing tool to be adjustably positioned.
  • One disadvantage of the jig is that an operator must ensure that the dressing tool or tools are correctly positioned prior to commencing an automated wheel dressing operation.
  • a further disadvantage is that the dressing tools must be located away from a normal operating region of the grinding wheel; otherwise accidental fouling of the dressing tools by the grinding wheel may result.
  • a dressing unit comprising a member one end of which is adapted to be mounted relative to a part of a grinding machine at which relative movement between the part and a grinding wheel of the machine can be effected, and the other free end of which is adapted to receive a dressing tool assembly, the free end of the member being displaceable between a first, retracted position at which the tool assembly is stowed when not in use, and a second, operational position at which the dressing tool assembly can be presented to the grinding wheel, and wherein said operational position is outside the grinding envelope of the grinding machine.
  • the member is U-shaped in plan view, the limbs of the U being mounted at their free ends to respective end portions of a rotatable shaft.
  • a hydraulic rotator may be provided to rotate the shaft.
  • an electrical or pheumatic drive may be used.
  • the aforementioned part is the table of that machine.
  • the dressing assembly comprises a toolpost, of generally triangular form, to which two or more dressing tools can be mounted detachably.
  • a dressing unit 1, illustrated in Figures 1 to 4 has a base 2 on which a hydraulic rotator 3 is mounted. Extending axially from opposite sides of the hydraulic rotator 3 are two end portions 4 of an output shaft 5.
  • a member 6 has the form, in plan view, of a U-shaped arm, as may be seen from Figure 1. Free limbs 7 of the U-shaped arm 6 are rotatably mounted upon the two end portions 4 of the output shaft 5, and are connected together by a cross-member 8 at an end region remote from the output shaft 5.
  • the cross-member 8 has a flat face 9 on which a dressing assembly 10 is mounted.
  • Dressing assembly 10 consists of a generally triangular toolpost 11 and a pair of dressing tools 12, disposed substantially centrally of the flat face 9.
  • the toolpost 11 is located on the cross-member 8 by two dowels 13 and is secured to the cross-member 8 by a bolt 14. Alternatively, the tool post 11 may be simply bolted to the cross member 8.
  • each prong 15 is provided with a respective inclined bore 16 in which a shank 17 of a respective one of the dressing tools 12 is received.
  • each dressing tool 12 carries a diamond tip 18.
  • the bores 16 are inclined at 90° to one another, such that the two diamond tips 18 are presented, perpendicular to one another. Whereas in the drawing the bores 16 are illustrated at 90° to each other, the invention is not restricted to this feature so that the diamond tips 18 may be inclined at any angle to perform the required dressing operation.
  • the hydraulic rotator 3 is used to rotate the U-shaped arm 6 between a retracted or horizontal position, shown in Figures 1 to 5, and an operational or vertical position shown in Figure 6. It may be seen from Figures 3 and 4, that within the hydraulic rotator 3, the output shaft 5 is rotationally supported by two spaced apart bearings 19. Each bearing 19 is mounted in a bearing housing 20.
  • a pair of seals 21 are also retained by the bearing housings 20 and are disposed along the output shaft 5.
  • a lip-seal 22 is received on the output shaft 5 adjacent each bearing 19. The seals 21 and 22 serve to prevent the passage of fluid, hydraulic or otherwise, along the output shaft 5.
  • An annular chamber 23, formed between the bearing housings 20 and the output shaft 5, has a pair of fixed radial vanes 24 axially disposed along a cylindrical wall 25 of the chamber 23 and effectively dividing the chamber into two arcuate chambers.
  • the fixed radial vanes 24 each coact with one of two rotatable vanes 26, rigidly attached to the output shaft 5, to form two hydraulic operating chambers 27 between opposing faces 28, 29 of the respective vanes 24, 26.
  • Rotation of the output shaft 5 is effected by the passage of hydraulic fluid, supplied to the dressing unit 1 by way of a pipe connect 30, to or from the operating chambers 27. It will be appreciated that only one arcuate chamber and rotatable vane may be used.
  • the dressing unit 1 is shown attached to a table 33 of a CNC surface grinding machine 34 by two mounting bolts 35. Also mounted on the table 33 is a magnetic chuck 36 on which a workpiece 37 is retained.
  • the U-shaped arm 6 When the U-shaped arm 6 is in the horizontal position, shown in Figure 5, it lies below the plane of an upper surface 38 of the magnetic chuck 36. Thus, the U-shaped arm 6 is retained away from a normal operating region of a grinding wheel 39 of the surface grinding machine 34.
  • the dressing unit 1 controlled by a CNC system of the surface grinding machine 34, is raised to the vertical position shown in Figure 6. In this position the dressing tools 12 are disposed above the level of the workpiece 37 as viewed in Figure 6. Under operator control both sides and the periphery of the grinding wheel 39 are caused to approach and touch in turn each diamond tip 128 to determine a datum position of each tip 18. Once the two datum positions are defined an automated dressing operation can commence.
  • the U-shaped arm 6 is returned to the horizontal position. Normal grinding of the workpiece 37 can subsequently proceed.
  • a particular advantage of the invention is that profiling of the grinding wheel 39 can be controlled by the CNC system without complex setting up of dressing tools 12.
  • a further advantage is that with the U-shaped arm 6 in the vertical position, the dressing tools 12 are within the normal operating region of the grinding wheel 39. Therefore, no time or machining capacity is wasted in relative movement of the grinding wheel 39 to an isolated region of the table 33, as required by the described prior art construction.
  • the grinding wheel 39 is dressed at a location above that of the workpiece 37, the grinding "envelope" (that is the table area and grinding zone above it) is not reduced or otherwise impaired. Furthermore, when the toolpost 11 is retracted, when necessary, the full area of the table 33 can be ground without fouling the diamond dressing assembly 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
EP88301460A 1987-02-25 1988-02-22 Dispositif de dressage Withdrawn EP0280483A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8704436 1987-02-25
GB878704436A GB8704436D0 (en) 1987-02-25 1987-02-25 Dressing unit

Publications (1)

Publication Number Publication Date
EP0280483A1 true EP0280483A1 (fr) 1988-08-31

Family

ID=10612930

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88301460A Withdrawn EP0280483A1 (fr) 1987-02-25 1988-02-22 Dispositif de dressage

Country Status (3)

Country Link
EP (1) EP0280483A1 (fr)
JP (1) JPS63306880A (fr)
GB (2) GB8704436D0 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1005935C2 (nl) * 1997-04-29 1998-11-02 Albert Geuzinge Afritsen van slijpstenen.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR853103A (fr) * 1939-01-18 1940-03-11 Dispositif pour rectifier les meules
US4202317A (en) * 1978-03-31 1980-05-13 Anthony Kushigian Grinding wheel dresser
US4480626A (en) * 1982-10-22 1984-11-06 Ibrahim Ibrahimpasic Device for dressing grinding wheels

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1682672A (fr) * 1925-08-07
GB340335A (en) * 1929-10-02 1931-01-01 Auto Machinery Company Ltd Radial grinding machines
FR1593220A (fr) * 1967-11-18 1970-07-03
US3640030A (en) * 1969-03-03 1972-02-08 Gleason Works Method for grinding toothed faced members

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR853103A (fr) * 1939-01-18 1940-03-11 Dispositif pour rectifier les meules
US4202317A (en) * 1978-03-31 1980-05-13 Anthony Kushigian Grinding wheel dresser
US4480626A (en) * 1982-10-22 1984-11-06 Ibrahim Ibrahimpasic Device for dressing grinding wheels

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DE - B - K22440 Ib/49d (KLINGELNBERG) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1005935C2 (nl) * 1997-04-29 1998-11-02 Albert Geuzinge Afritsen van slijpstenen.
EP0876875A1 (fr) * 1997-04-29 1998-11-11 Albert Geuzinge Dressage de meules de rectification

Also Published As

Publication number Publication date
GB2201618A (en) 1988-09-07
JPS63306880A (ja) 1988-12-14
GB8704436D0 (en) 1987-04-01
GB8804272D0 (en) 1988-03-23

Similar Documents

Publication Publication Date Title
US8500518B2 (en) Method of grinding an indexable insert and grinding wheel for carrying out the grinding method
CA2703090A1 (fr) Porte-outil
EP0341968A3 (fr) Machine-outil à commande numérique
JP4344690B2 (ja) クランプ組立品
JPS61244455A (ja) 研削盤
JPS5927284B2 (ja) 鋳物バリ取り機
JP2003094262A (ja) クランクシャフト加工ラインの加工方法
EP0169286A3 (fr) Toupie
JPS6232050B2 (fr)
EP0280483A1 (fr) Dispositif de dressage
US4376357A (en) Machine tools
US5137397A (en) Cutting tool and method for using the same
CN217095698U (zh) 一种轧辊的端面多刀粗车装置
KR0177327B1 (ko) 공작물의 슬롯 깊이조절용 가공공구
CA1247349A (fr) Mecanisme d'indexage d'outils de coupe
GB1575251A (en) Machine tools
Nakagawa et al. Development of a new turning center for grinding ceramic materials
JPH01103217A (ja) 正面フライス
US4467564A (en) Arrangement of a measurement controlling device in circular grinding machines
JPS61214903A (ja) 旋盤
US4404772A (en) Cylindrical grinding machine
CN217070800U (zh) 一种卧式双面镗铣加工系统
US3811234A (en) Method of forming workpieces by abrading
CN209831122U (zh) 一种半自动铣刀研磨机
JPS6195862A (ja) フライス工具の研削方法

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES FR GR IT LI LU NL SE

17P Request for examination filed

Effective date: 19890223

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

17Q First examination report despatched

Effective date: 19900622

18W Application withdrawn

Withdrawal date: 19900627