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
  • B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
  • B23Q5/02—Driving main working members
  • B23Q5/04—Driving main working members rotary shafts, e.g. working-spindles
  • B23Q5/043—Accessories for spindle drives
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23C—MILLING
  • B23C3/00—Milling particular work; Special milling operations; Machines therefor
  • B23C3/12—Trimming or finishing edges, e.g. deburring welded corners
• • 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
  • B24B27/00—Other grinding machines or devices
  • B24B27/033—Other grinding machines or devices for grinding a surface for cleaning purposes, e.g. for descaling or for grinding off flaws in the surface
  • B24B27/04—Grinding machines or devices in which the grinding tool is supported on a swinging arm
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23C—MILLING
  • B23C2210/00—Details of milling cutters
  • B23C2210/32—Details of teeth
  • B23C2210/326—File like cutting teeth, e.g. the teeth of cutting burrs
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23C—MILLING
  • B23C2265/00—Details of general geometric configurations
  • B23C2265/08—Conical
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T29/00—Metal working
  • Y10T29/44—Filing
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T409/00—Gear cutting, milling, or planing
  • Y10T409/30—Milling
  • Y10T409/304144—Means to trim edge
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T409/00—Gear cutting, milling, or planing
  • Y10T409/30—Milling
  • Y10T409/3042—Means to remove scale or raised surface imperfection
  • Y10T409/304256—Means to remove flash or burr

Definitions

• the present invention relates to a device in a rotating drive means for a tool, e.g. a file or a milling tool, intended for 5 mounting on the arm of an industrial robot or another automat ⁇ ic device for burring on machined workpieces or the like, comprising a casing with a motor, especially a pneumatic motor for actuating said tool.
• a tool e.g. a file or a milling tool
• a motor especially a pneumatic motor for actuating said tool.
• the tool previously used for burring was characterized by the fact that the elastic force and, thus, the elastic movement had a direction orthogonally to the axis of rotation of the burring tool, and that the entire tool for burring was spring- cushioned. Rubber suspension secured spring action in all directions orthogonally to the axis of rotation. This resulted in problems in connection with vibrations of the burring tool. Consequently, the restriction was adopted that the tool only tilts about one axis that is orthogonal to the axis of rotation.
• the forc.e is provided, e.g. by a mechanical spring arranged to have an approximately linear characteristic,and, thus, yielding an approximately constant force of contact with the workpiece.
• the main object of the present invention is to propose a 25 drive means for a tool, e.g. a file or a milling means or the like intended for mounting on the arm of an industrial robot for burring of machined workpieces or the like, so that an additional degree of freedom on the robot may be avoided and that the mass that has to be moved to compensate for in- 30 accuracies of the workpiece is as small as possible, and the gravity centre distance is made as small as possible. It is, furthermore, an object of the invention to indicate, more specifically, a practical embodiment of such a drive means.
• the object of the invention is achieved by a device of the above mentioned kind that is characterized by a combination of the following features: the milling tool or file is conically tapered with an angle between 60° and 120 , preferably approximately 90 , and the milling tool or file is made axially movable and constantly actuated by a force in a direction outwards from the device. According to a further feature of the invention the contact force is equal, independently of the orientation of the device in space during one and the same operation.
• a practical embodiment according to the invention is charact- erized by the fact that a sleeve is provided, via splines on the motor shaft, with the tool shaft rigidly fixed to the free end of said sleeve, that the shaft is rotatably mounted in a sleeve shaped piston, coaxially arranged outside said sleeve, and that the piston is arranged to be rotatable and axially movable in a cylinder in said casing, with an air duct for supplying compressed air to actuate said piston extending to said cylinder.
• Figure 1 shows a drive means according to the invention mounted at the end of a robot arm
• Figure 2 shows the device, partly in section
• Figure 3 shows the device-in use for burring workpieces of different shapes, illustrating deviation relative to a nominal workpiece.
• Figure 1 shows a drive means according to the invention, generally designated 1, and attached to the end of a robot arm by the aid of a mounting support 2, that is turnable or tilt- able about an axis 3.
• the device is viewed during treatment of a workpiece 4 where burr 5 is to be removed.
• burring device 1 is moved by the robot in the direction of arrow 6.
• To compensate for any possible irregularities on said workpiece tool 7 is axially movable back and forth in the direction of arrow 8 in device 1.
• the device mainly comprises a casing 9 wherein a motor 10 is mounted.
• a sleeve 12 is mounted to be axially movable on motor shaft 11 and on the outer free end of said sleeve 12 the spindle 13 of a conical file 7 or milling -means is secured by the aid of a thread connection, ' 14.
• Coaxially outside sleeve 12 another sleeve 15 is provided to act as a piston and is axially movable in a sleeve shaped extension 16 of casing 9.
• Spindle 13 is mounted by the aid of bearings 18 to the inside of said sleeve shaped piston 15.
• Sleeve shaped cylinder 16 has a stepped portion 19 so that a circular edge 20 facing inwards is formed.
• Piston 15 is provided with a thickened part or flange 21 at its inner edge, and the outer edge of said thickened part or flange co ⁇ operates with edge 20 to limit the axial outward movement of piston 15.
• an air duct 22 extends and opens at the outer end of motor shaft 11.
• Compressed air supplied through duct .22 will, thus, enter sleeve 12 and flow through the gap in splines on shaft 11 and into cylinder space 23 behind piston 15.
• Sleeve 12 and piston 15 are machined with a certain mutual clearing, so that a smaller volume of air will leak out into the slot between said means. This will lubricate and cool the bearings and blow away shavings and dust to prevent the latter from entering the device or the bearings when the tool is in use.
• Figure 3 shows how the device according to the invention will compensate for deviations of the workpiece dimensions and deviations of position.
• a the position of the workpiece equals the nominal position for which the program of said robot is arranged.
• the workpiece has a positive axial deviation, and burring is achieved due to the fact that tool 7 is automatically displaced somewhat forward by the constant air pressure.
• Figure c there is a negative axial deviation, and the tool is retracted further into said device.
• a negative radial deviation is present, and burring is achieved by the fact that the tool is extended out of the device and in such a manner that burring occurs on the outside portion of the cutting of said tool.
• e there is a positive radial deviation, and the tool is here urged into said device,and burring is achieved at the central portion of the cutting part of the tool.
• Piston 15 can rotate freely in cylinder 16. Thus, static friction and stiction are avoided.

Priority Applications (2)

Applications Claiming Priority (4)

Publications (1)

Family

ID=26647918

Family Applications (1)

Country Status (4)

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Citations (9)

Family Cites Families (3)

• 1986
  • 1986-09-22 NO NO863763A patent/NO159351C/no unknown
  • 1986-09-23 WO PCT/NO1986/000068 patent/WO1987001641A1/en active IP Right Grant
  • 1986-09-23 US US07/053,857 patent/US4784540A/en not_active Expired - Lifetime
  • 1986-09-23 EP EP19860905952 patent/EP0241506B1/en not_active Expired - Lifetime

Patent Citations (9)

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