EP0794036B1 - Machine pour polir et/ou meuler - Google Patents

Machine pour polir et/ou meuler Download PDF

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Publication number
EP0794036B1
EP0794036B1 EP97102385A EP97102385A EP0794036B1 EP 0794036 B1 EP0794036 B1 EP 0794036B1 EP 97102385 A EP97102385 A EP 97102385A EP 97102385 A EP97102385 A EP 97102385A EP 0794036 B1 EP0794036 B1 EP 0794036B1
Authority
EP
European Patent Office
Prior art keywords
machine
liquid
valve
supercritical
pipe
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
EP97102385A
Other languages
German (de)
English (en)
Other versions
EP0794036A1 (fr
Inventor
Roland Henneborn
Peter Holz
Michael Lechner
Wolfgang Volker
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.)
Messer Griesheim GmbH
Original Assignee
Messer Griesheim GmbH
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
Priority claimed from DE19704860A external-priority patent/DE19704860C1/de
Application filed by Messer Griesheim GmbH filed Critical Messer Griesheim GmbH
Publication of EP0794036A1 publication Critical patent/EP0794036A1/fr
Application granted granted Critical
Publication of EP0794036B1 publication Critical patent/EP0794036B1/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
    • 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
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B24B23/026—Fluid driven
    • 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
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/02—Equipment for cooling the grinding surfaces, e.g. devices for feeding coolant

Definitions

  • the invention relates to a machine according to the preamble of claim 1.
  • a machine of the applicant which comprises a polishing wheel and a cold gas supply for cooling the surface to be polished or ground, the cold gas supply preferably opening into a gas outlet which is arranged in the axis of rotation of the polishing wheel .
  • the device is preferably operated with N 2 as the cold gas, which is stored in liquid form, evaporated and fed to the gas outlet via the cold gas supply.
  • N 2 as the cold gas
  • the nitrogen In order to ensure an optimal operating temperature of the cold gas, which essentially depends on the material properties of the surface to be treated, the nitrogen must be heated at a complex temperature. It is also known to operate such a machine with CO 2 as the cold gas, which has a temperature of -78 ° C. during the evaporation of liquid CO 2 .
  • This temperature is advantageous for the operation of such machines, since it usually exactly meets the requirements for cooling.
  • the machine used according to the prior art is preferably operated with N 2 , since this gas can be conducted in lines without problems. For this it is accepted that the vaporized nitrogen is brought to the desired temperature by supplying energy.
  • N 2 has been preferred so far because CO 2 has the property of having a liquid-gaseous phase transition, CO 2 snow to form, the lines and the gas outlet clogged. This significantly impedes the operation of the machine and limits the operating time.
  • the invention is therefore based on the object of providing a machine for polishing and grinding, with which treatment of surfaces with CO 2 as cold gas is possible without problems.
  • a polishing wheel 2 is used as Machining tool set in rotation by a gear 3, which by an air motor 4 is driven.
  • the Gas supply 5 opens into the tube 6, the upper end of which Thrust washer 9 and a stuffing box 10 with the aid of the adjusting device 11 is closed, which is designed as a union nut, with which the thread 8, the valve spindle 12 are moved axially within the tube 6 can.
  • the expansion nozzle 7 has a tapered outlet Opening 13, an aperture 14 and a pressure screw 15.
  • FIG. 3 the opening 13 that tapers conically, the diaphragm 14, the pressure screw 15, the tube 6 and the gas supply 5 are shown.
  • the liquid or supercritical CO 2 flows from a riser bottle, a high-pressure, medium-pressure low-pressure tank or a pipeline into the machine 1 via the gas supply 5.
  • the valve which regulates the flow rate of liquid or supercritical CO 2 is run through.
  • the liquid or supercritical CO 2 enters the tube 6 and exits through the expansion nozzle 7. Due to the sudden expansion, the liquid or supercritical CO 2 evaporates and goes into the gas phase. It has a temperature of -78 ° C, which is very suitable for cooling sensitive surfaces. It is characteristic that no impermissible pressure losses occur in the gas supply 5 and the tube 6. As a result, there can be no disturbing CO 2 snow formation in these lines, which blocks the supply of CO 2 and clogs the gas paths. The relaxation takes place only in the nozzle area.
  • the expansion nozzle 7 is in the immediate vicinity of the working area of the Machining tool arranged. It is preferably located in the Rotation axis of the polishing wheel 2. However, there are also arrangements conceivable, in which the expansion nozzle 7 in the region of the polishing disc 2 is introduced such that it with the polishing disc 2 a Rotational movement takes place. Of course, several can Relaxation nozzles 7 may be attached. As the opening of the expansion nozzle 7 come control cones or interchangeable, tapered on the outlet side Openings in question. Pinholes can also be used. At The use of a control cone can reduce the gas throughput of those to be solved Polishing or grinding task can be adapted.
  • the diameter of the valve spindle 12 and the inside width of the tube 6 are dimensioned such that the liquid or supercritical CO 2 does not relax inside the tube 6.
  • the dimensions of the valve spindle 12 and the tube 6 are preferably chosen so that the annular gap between the inner surface of the tube 6 and the outer surface of the valve spindle 12 is approximately 0.2 to 2 mm. In this case, a pressure drop can only take place at the outlet of the still liquid or supercritical CO 2 from the pipe 6 and the flow paths of the liquid or supercritical CO 2 are thus kept clear.
  • the expansion nozzle 7 For the machining of surfaces that place special demands on the machining temperature, it is possible to equip the expansion nozzle 7 with a temperature sensor, which measures the current temperature and controls a heating device, preferably a small heating coil, which is arranged in the region of the expansion nozzle 7 is. This allows the environment of the expansion nozzle 7 to be tempered.
  • a temperature sensor which measures the current temperature and controls a heating device, preferably a small heating coil, which is arranged in the region of the expansion nozzle 7 is.
  • a heating device preferably a small heating coil

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Disintegrating Or Milling (AREA)
  • Nozzles (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)

Claims (7)

  1. Machine (1) pour lustrer et/ou polir avec un outil de traitement devant effectuer un mouvement relatif par rapport à la pièce à oeuvrer, dans lequel sont associés à l'outil de traitement des moyens servant à amener du gaz carbonique liquide ou surcritique,
    caractérisée en ce que
    les moyens pour amener le gaz carbonique liquide ou surcritique comprennent une soupape de régulation du débit de gaz carbonique liquide ou surcritique, et
    la soupape est disposée à l'intérieur de la machine.
  2. Machine (1) selon la revendication 1,
    caractérisée en ce que
    la soupape (8) présente un tuyau (6), à travers lequel passe une queue de soupape (12) dont le diamètre a une dimension plus petite que l'ouverture libre du tuyau (6), queue de soupape (12) à laquelle est associée un diaphragme (14),
    la buse de détente (7) qui s'étend de façon conique qui s'ouvre et peut se fermer au moyen de la queue de soupape (12), porte un orifice (13) qui va en s'élargissant du côté de la sortie et
    l'ouverture libre du tuyau (6) est dimensionnée de telle sorte que le gaz carbonique liquide ou surcritique ne se détend pas à l'intérieur du tuyau (6).
  3. Machine (1) selon la revendication 1 ou 2,
    caractérisée en ce que
    la buse de détente (7) est disposée directement à proximité de la surface de travail de l'outil de traitement.
  4. Machine (1) avec un outil de traitement entraíné en rotation selon l'une des revendications 1 à 3,
    caractérisée en ce que
    les moyens pour amener le gaz carbonique liquide ou surcritique sont disposés coaxialement à l'intérieur d'une broche creuse qui porte l'outil de traitement.
  5. Machine (1) selon l'une des revendications 1 à 4,
    caractérisée en ce qu'
    on dispose dans la zone de la buse de détente (7) un dispositif de chauffage, dont la délivrance de chaleur est commandée par un capteur de température.
  6. Machine (1) selon l'une des revendications 1 à 5,
    caractérisée en ce que
    le gaz carbonique liquide ou surcritique est amené à la soupape par un tuyau flexible en matière plastique.
  7. Machine (1) selon l'une des revendications 2 à 6,
    caractérisée en ce que
    la fente annulaire comprise entre la surface intérieure du tuyau (6) et la surface enveloppe de la queue de la soupape (12) atteint 0,2 à 2 mm.
EP97102385A 1996-03-07 1997-02-14 Machine pour polir et/ou meuler Expired - Lifetime EP0794036B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19608935 1996-03-07
DE19608935 1996-03-07
DE19704860 1997-02-10
DE19704860A DE19704860C1 (de) 1996-03-07 1997-02-10 Maschine zum Polieren und/oder Schleifen

Publications (2)

Publication Number Publication Date
EP0794036A1 EP0794036A1 (fr) 1997-09-10
EP0794036B1 true EP0794036B1 (fr) 2000-05-10

Family

ID=26023586

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97102385A Expired - Lifetime EP0794036B1 (fr) 1996-03-07 1997-02-14 Machine pour polir et/ou meuler

Country Status (6)

Country Link
US (1) US5823863A (fr)
EP (1) EP0794036B1 (fr)
AT (1) ATE192684T1 (fr)
BR (1) BR9701213A (fr)
CA (1) CA2199163A1 (fr)
NO (1) NO309512B1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19736291A1 (de) * 1997-08-21 1999-02-25 Messer Griesheim Gmbh Vorrichtung zur Leitung von Druckluft und flüssigem oder überkritischem Kohlendioxid oder Distickstoffmonoxid in einem Schlauch
DE102005034634B3 (de) * 2005-07-25 2007-03-29 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren und Werkzeug zur Reinigung von Kavitäten
JP5856496B2 (ja) * 2012-01-31 2016-02-09 ミネベア株式会社 切削液供給装置
CN114040818B (zh) * 2019-05-10 2024-04-16 聚变冷却剂系统公司 用于利用超临界加工流体的加工系统的刀具
CN111705368B (zh) * 2020-06-10 2025-09-23 东华大学 基于瞬时释压纺丝法制备聚丙烯纤维集合体的方法及应用
CN111691060B (zh) * 2020-06-10 2022-11-11 东华大学 基于瞬时释压纺丝法的高聚物纤维、其制备方法及应用

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1952910A (en) * 1930-11-14 1934-03-27 Black & Decker Mfg Co Polisher with reservoir
US2635399A (en) * 1951-04-19 1953-04-21 Thompson Prod Inc Method for grinding carbide tools
GB1550430A (en) * 1977-05-10 1979-08-15 Henderson Diamond Tool Co Ltd Cooling of grinding wheel dressing operations and tools for use therewith
US4129966A (en) * 1977-08-25 1978-12-19 Ransburg Corporation Grinder apparatus with pollution control fluid dispensing means
US4523411A (en) * 1982-12-20 1985-06-18 Minnesota Mining And Manufacturing Company Wet surface treating device and element therefor
DE3607580A1 (de) * 1986-03-07 1987-09-10 Gehring Gmbh Maschf Honeinrichtung
JPH02230213A (ja) * 1989-03-03 1990-09-12 Canon Inc 液晶表示装置
ES2059858T3 (es) * 1989-04-01 1994-11-16 Messer Griesheim Gmbh Dispositivo de pulido o esmerilado.
DE3910590C2 (de) 1989-04-01 1997-10-16 Messer Griesheim Gmbh Handpoliermaschine
DE4222766A1 (de) * 1992-07-10 1994-01-13 Walter Fuchs Reinigungs-Poliervorrichtung mit einem Handgerät und Reinigungs-Polierverfahren

Also Published As

Publication number Publication date
CA2199163A1 (fr) 1997-09-07
NO971028L (no) 1997-09-08
BR9701213A (pt) 1998-11-10
NO971028D0 (no) 1997-03-06
NO309512B1 (no) 2001-02-12
US5823863A (en) 1998-10-20
ATE192684T1 (de) 2000-05-15
EP0794036A1 (fr) 1997-09-10
MX9701640A (es) 1997-09-30

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