EP0794036B1 - Maschine zum Polieren und/oder Schleifen - Google Patents
Maschine zum Polieren und/oder Schleifen Download PDFInfo
- 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
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
- 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)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
- Grinding-Machine Dressing And Accessory Apparatuses (AREA)
- Nozzles (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
- Disintegrating Or Milling (AREA)
Description
- Fig.1:
- Eine für die Durchführung des Verfahrens geeignete Maschine,
- Fig.2:
- Einen Ausschnitt der Maschine in Figur 1, in dem die Gaszufuhr und der Gasaustritt dargestellt sind,
- Fig.3:
- Einen Querschnitt durch den Gasaustritt.
Claims (7)
- Maschine (1) zum Polieren und/oder Schleifen mit einem eine Relativbewegung gegenüber dem Werkstück auszuführenden Bearbeitungswerkzeug, bei dem dem Bearbeitungswerkzeug Mittel zur Zufuhr von flüssigem oder überkritischem CO2 zugeordnet sind,
dadurch gekennzeichnet,
daß die Mittel zur Zufuhr des flüssigen oder überkritischen CO2 ein Ventil zur Regulierung der Durchflußmenge des CO2 mit einer Entspannungsdüse (7) für das flüssige oder überkritische CO2 umfassen und daß das Ventil innerhalb der Maschine angeordnet ist. - Maschine (1) nach Anspruch 1,
dadurch gekennzeichnet,
daß das Ventil (8) ein Rohr (6) aufweist, durch das eine im Durchmesser kleiner als die Lichte Weite des Rohres (6) dimensionierte Ventilspindel (12) verläuft, dem eine Blende (14) zugeordnet ist, daß die konisch zulaufende und mittels der Ventilspindel (12) zu öffnende und verschließbare Entspannungsdüse (7) eine sich ausgangs verbreiternde Öffnung (13) trägt und daß der Durchmesser der Ventilspindel (12) und die lichte Weite des Rohres (6) so bemessen sind, daß das flüssige oder überkritische CO2 sich nicht im Innern des Rohres (6) entspannt. - Maschine (1) nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß die Entspannungsdüse (7) unmittelbar in Nähe der Arbeitsfläche des Bearbeitungswerkzeugs angeordnet ist. - Maschine (1) mit einem rotierend angetriebenen Bearbeitungswerkzeug nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet,
daß die Mittel zur Zufuhr des flüssigen oder überkritischen CO2 koaxial innerhalb einer das Bearbeitungswekzeug tragenden Hohlspindel angeordnet sind. - Maschine (1) nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet,
daß im Bereich der Entspannungsdüse (7) eine Heizeinrichtung angeordnet ist, deren Wärmeabgabe von einem Temperaturfühler gesteuert wird. - Maschine (1) nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet,
daß das flüssige oder überkritische CO2 dem Ventil durch einen flexiblen Kunststoffschlauch zugeführt wird. - Maschine (1) nach einem der Ansprüche 2 bis 6,
dadurch gekennzeichnet,
daß der Ringspalt zwischen der Innenfläche des Rohres (6) und der Mantelfläche der Ventilspindel (12) 0,2 bis 2 mm beträgt.
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 (de) | 1997-09-10 |
EP0794036B1 true EP0794036B1 (de) | 2000-05-10 |
Family
ID=26023586
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97102385A Expired - Lifetime EP0794036B1 (de) | 1996-03-07 | 1997-02-14 | Maschine zum Polieren und/oder Schleifen |
Country Status (6)
Country | Link |
---|---|
US (1) | US5823863A (de) |
EP (1) | EP0794036B1 (de) |
AT (1) | ATE192684T1 (de) |
BR (1) | BR9701213A (de) |
CA (1) | CA2199163A1 (de) |
NO (1) | NO309512B1 (de) |
Families Citing this family (5)
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 |
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 |
CN111705368A (zh) * | 2020-06-10 | 2020-09-25 | 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 |
Family Cites Families (10)
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 |
EP0391148B1 (de) * | 1989-04-01 | 1994-06-01 | Messer Griesheim Gmbh | Polier- oder Schleifeinrichtung |
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 |
-
1997
- 1997-02-14 EP EP97102385A patent/EP0794036B1/de not_active Expired - Lifetime
- 1997-02-14 AT AT97102385T patent/ATE192684T1/de not_active IP Right Cessation
- 1997-02-28 US US08/806,388 patent/US5823863A/en not_active Expired - Fee Related
- 1997-03-04 CA CA002199163A patent/CA2199163A1/en not_active Abandoned
- 1997-03-06 BR BR9701213A patent/BR9701213A/pt not_active IP Right Cessation
- 1997-03-06 NO NO971028A patent/NO309512B1/no not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
BR9701213A (pt) | 1998-11-10 |
NO971028L (no) | 1997-09-08 |
ATE192684T1 (de) | 2000-05-15 |
CA2199163A1 (en) | 1997-09-07 |
MX9701640A (es) | 1997-09-30 |
NO309512B1 (no) | 2001-02-12 |
EP0794036A1 (de) | 1997-09-10 |
US5823863A (en) | 1998-10-20 |
NO971028D0 (no) | 1997-03-06 |
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