Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
  • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
  • B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
  • B23Q3/06—Work-clamping means
  • B23Q3/08—Work-clamping means other than mechanically-actuated
  • B23Q3/086—Work-clamping means other than mechanically-actuated using a solidifying liquid, e.g. with freezing, setting or hardening means

Definitions

• the present invention relates to a rotary fixing device by freezing comprising a fixed part cooperating with a movable central part.
• a fixing mechanism for example pneumatic or magnetic, making it possible to hold on a laying, for example, parts of small thicknesses, or of complicated or variable shapes of a part to l 'other, for machining.
• the device is characterized in that the fixed part is composed of a circumferential sheath receiving electrical elements which transmit an electric current on a continuous rotating part comprising at one of its ends a head which is provided with 'a set of organs thermally or electrically producing a temperature variation which generates on a laying surface a fixing by freezing allowing the maintenance of parts to be machined.
• Fig. 1 shows an axial schematic section of the device comprising the rotary mechanism capped with the fixing head.
• Fig. 2 shows a schematic axial section with the addition, on the left, of the drive motor.
• Fig. 3 shows a schematic plan view of the device having external cooling.
• Fig. 4 shows a schematic axial section of an alternative embodiment of the power supply.
• Fig. 5 shows an axial section of an adjustable laying head.
• Fig. 6 shows a schematic plan view in accordance with FIG. 5.
• Fig. 7 shows a partial axial view of a fixing head provided with electric heating elements.
• the fixing device object of the present invention which comprises, with reference to Figure 1, an outer sheath 1, composed of a body 2 serving in positioning the ball bearings 3-4 .
• the body 2 is integral with a support ring 5 which cooperates with a sleeve 6 allowing the supply of a coolant by means of a radial passage hole 7 opening in a circumferential groove machined on said sleeve and communicating with the bore 8 in the shaft 9.
• a passage hole 12 is also provided in the sleeve 6 for the eva ⁇ cuation of the coolant from the Peltier elements.
• the sleeve 6 being inserted between the support ring 5 and a cage 15 serving to support the terminals 16 which supply electrically, via the brushes 17, a collector 18 which allows the transmission of an electric current in a channel of distri ⁇ bution, not shown, located in one "shaft 9, and alimen ⁇ both Peltier elements in a head 25.
• a flange 19 is also provided to cover the device.
• the bore 8 is arranged so as to be communicating with a channel pierced axially in the shaft 9 and opening into the alen ⁇ towers on the so-called hot side of the Peltier elements which are located in an insulating body forming part of the head 25.
• Seals 22 serve to seal the different parts 2,5,6,15 together perfectly.
• the head 25 On one end of the shaft 9 is mounted the head 25 which is composed of a set of members relating to the cooling elements 26 producing a Peltier effect, known and therefore not described.
• the elements 26 being in contact with a fixing plate 27 called cold plate, serving as a base for the workpieces or intermediate laying, not shown and which are fixed by the freezing of a liquid, produced by the refrigeration of the plate 27 .
• the Peltier elements are in addition by their opposite faces, in contact with a so-called hot plate used for the evacuation of the heat, produced by the Peltier effect, outside the device.
• the head 25 being driven in unlimited rotation, step by step or continuously by means of the shaft 9 for all kinds of machining.
• the liquid for fixing the workpiece can be applied to water, to distilled water to avoid stains on the finished parts, or to special liquids, the viscosity of which gives a better distribution. fixing power.
• the shaft 3 ⁇ supporting the head (not shown) is driven by means of a motor 31 mounted on the end opposite to the head, a rotary sensor 32 allowing the control of the movements for the machining of the parts held by freezing.
• the electrical supply and the coolant for the Peltier elements can also be carried out by means of a special flange located at one of the ends of the shaft 9 which is entrained in this execution, by conventional means.
• the device 35 is provided with a cooling mechanism 36 composed of a nozzle 37 and a support 38, the coolant being directed onto a so-called hot plate 39, * touching Peltier elements.
• the head 40 being rotary, unlimited, step by step or continuously, according to the basic principle which has been described in the present invention.
• the electrical supply 45 of the Peltier elements is carried out by means of an electromagnetic assembly 46 without contacts.
• the head 47 is always secured to the shaft 48.
• FIGS. 5-6 show a head 50 provided with a centering mechanism 51 which is composed of screws 52 and 53 enabling the axes X and Y to be taken up in the direction of the arrows.
• the centering mechanism 51 being placed between a shaft 54 and the head 50 containing the Peltier elements 55 to avoid excessive heat loss.
• FIG. 7 shows a head 60 supporting a so-called cold plate 61 receiving a setting 62 which positions a part 63 for its machining.
• the particularity of this execution consists in the use of electric heating elements 65 which serve for the rapid thawing of the part 63.
• the thawing can be obtained by electrical means, by a jet of hot air on the part, by a flow of steam of water or even by means of a high frequency device or directly by the Peltier elements. .
• the regulation and the thermal control of the freezing of fixation can be done by means of a probe being at the level of the Peltier elements, by an infrared or optoelectronic device without contact, aiming at a point of the so-called cold plate the fitting or the workpiece, which is thus automatically checked.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Jigs For Machine Tools (AREA)
• Processing Of Stones Or Stones Resemblance Materials (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=4224105

Family Applications (1)

Country Status (4)

Cited By (1)

Citations (13)

Family Cites Families (1)

• 1987
  • 1987-05-26 CH CH202387A patent/CH671540A5/fr not_active IP Right Cessation
• 1988
  • 1988-05-24 EP EP19880904201 patent/EP0317585A1/fr not_active Ceased
  • 1988-05-24 WO PCT/CH1988/000099 patent/WO1988009239A1/fr not_active Application Discontinuation
• 1989
  • 1989-01-20 GB GB8901218A patent/GB2211119B/en not_active Expired - Fee Related

Patent Citations (13)

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