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
  • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
  • B23Q11/0042—Devices for removing chips
  • B23Q11/005—Devices for removing chips by blowing
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
  • B23B31/02—Chucks
  • B23B31/24—Chucks characterised by features relating primarily to remote control of the gripping means
  • B23B31/26—Chucks characterised by features relating primarily to remote control of the gripping means using mechanical transmission through the working-spindle
  • B23B31/261—Chucks characterised by features relating primarily to remote control of the gripping means using mechanical transmission through the working-spindle clamping the end of the toolholder shank

Definitions

• the present invention relates to a tool attaching / detaching mechanism of a machine tool, and more particularly to a machine tool provided with a washing means for wiping and washing chips, cutting oil, etc. attached to a tool gripping end of a tool spindle with pressurized air.
• the present invention relates to a tool attaching / detaching mechanism.
• a tool grip consisting of a taper hole to hold the tool firmly with high coaxial accuracy with respect to the center of the spindle.
• a tool gripper is provided with a tool gripper that allows a tool gripper to move or release a tool when the drawbar is relatively moved inside the main shaft.
• a spring for constantly urging the drawbar in a fixed direction, for example, upward is provided inside the main shaft, and the spring is attached.
• a structure of a tool attachment / detachment mechanism in which a push-down lever for moving a draw bar in the push-down direction against the force is provided at the top of the spindle head is disclosed in, for example, already-approved U.S. Patent Application No. 085,258. .
• the above-mentioned ⁇ -bar is caused to move up and down.
• the spindle head moves up and down along a machine tool column such as a machine tool column
• one end of the push-down lever engages or disengages with a cam provided at one place on the machine base.
• the push-down lever is caused to move, and the other end of the push-down lever pushes down the top end of the drawer protruding from the top of the spindle.
• the present invention automatically achieves the cleaning of the tool gripping portion of the tool spindle automatically by using the pressure air which can be relatively easily used at the site of the machine work in order to meet the above-mentioned demand. It is intended to provide a tool attachment / detachment mechanism for a machine tool having means.
• a machine base of the machine tool ⁇ a cam provided on the machine base, and moving in a predetermined direction along the machine base
• a spindle head provided with a tool spindle portion together with the spindle head, a pivot follower attached to the spindle head, a force follower for engaging and disengaging the cam at one end, and a pressing end at the other end.
• a tool attachment / detachment mechanism for a machine tool wherein the tool attachment / detachment mechanism activates an attachment / detachment operation at a tool gripping end of the tool spindle by a pressing end at the other end in accordance with the pivotal movement of the lever.
• An air pressure passage means formed and provided at the center of the main shaft portion so as to penetrate from the top end of the tool main shaft portion to the tool gripping end; and an air pressure supply means provided at a pressing end of the lever.
• a machine tool characterized in that when the tool is released from the tool gripping end, air pressure is supplied through the air pressure passage means according to the engagement between the pressing end of the lever and the top end of the tool spindle. Tool attachment / detachment mechanism for machines Provided.
• FIG. 1 is an enlarged cross-sectional view of the structure of a tool spindle portion of a machine tool provided with a tool attaching / detaching mechanism according to an embodiment of the present invention.
• FIG. 3 is a partial cross-sectional view for explaining in detail an engagement structure between a pressing end of the lever and a top of a spindle.
• the spindle head 1 2 of the machine tool and the A part of the system 14 is shown, with the spindle head 12 having a tool spindle 10.
• the tool spindle 10 is rotatably provided at a high speed through a suitable number of rotary bearings 18 inside the shaft housing 16 of the spindle head 12.
• a tool gripper 22 having a tapered hole-shaped tool mounting hole 20 is provided.
• the lower end of the drawer 24 faces.
• a pulley 21 is fixed to the upper part of the tool spindle 10, and a rotational driving force is transmitted from the spindle motor (not shown) to the tool spindle 10 via the pulley 21. .
• the door bar 2 is a rod extending upward inside the tool spindle 10 and is provided so as to be movable in the vertical direction, and is always spring-loaded upwardly from the tool spindle 10.
• the above-mentioned chuck at the lower end joins the pull stud of the tool T, and at the same time, pulls the tool T upward, and closely contacts and grips the tool mounting hole 20.
• the spring 26 is provided between an inner spring seat 28 a of the tool spindle 10 and a spring seat 28 b of an adapter 30 fixed above the draw bar 24.
• a cap-shaped pressing element 32 is placed on the upper part of the adapter 30.
• the above-mentioned Berg-rank type lever 40 has a driven end 44 having a cam driven roller together with the above-mentioned pressing end 42 and has a horizontal glaze 46 on the top of the main head 12.
• the push bar 42 is always held by a spring 48 so as to be released from the pusher 32 of the draw bar 2 by a spring 48.
• the movement of 4 4 getting on and off is caused by the vertical movement of the spindle head 1 2 with respect to the column 14, and the vertical movement of the spindle head 1 2 is well known. In this way, it is activated via an appropriate vertical feed mechanism such as a ball screw shaft.
• the machine tool when the tool T is mounted in the tool mounting hole 20 of the tool spindle 10 in the spindle head 12 described above, the machine tool is mounted on the tapered surface of the tool mounting hole 20. If dust such as cutting chips generated during the process or other cutting fluid adheres, the correct mounting of the taper shank portion of the tool T is impaired. It can be cleaned and wiped off with a drawer.
• An air supply hole 50 penetrating from the upper end to the lower end is provided substantially at the center of the tool spindle, the lower end of the air supply hole 50 is opened to the tool mounting hole 20 of the tool spindle 10, and the upper end is a pressing element 3 2.
• a structure is formed in which a through hole 52 opened at the center of the hole is opened to the outside.
• a through hole 54 is formed so as to be in close contact with the upper surface of the pressing element 32.
• a through hole 54 is formed as an opening for introducing compressed air supplied from outside using an air conduit 56 made of a flexible pipe or the like.
• the conduit 56 is connected to the through hole 54 using a suitable fitting 58.
• the air conduit 56 is connected to the pressurized air source 60 via a regulator 62, a filter 64, and a switching valve 66 during the attachment / detachment of the tool.
• pressurized air is supplied to the through-hole 54 of the Bergrank type lever 140.
• the pressing end 42 of the lever 40 engages and comes into close contact with the pressing element 32 on the spindle head 12 side, so that the pressurized air passes through the center of the pressing element 32.
• the air supply holes 50 of the drawbars 24 and the drawbars 24 they are ejected to the tool mounting holes 20 at the lower end of the tool spindle 10, and the holes 20 are cleaned and wiped privately.
• the timing of supplying the pressurized air from the air conduit 56 in synchronization with the timing when the Berg Rank type lever 40 is pressed and engaged with the presser 32 is, for example, as described above. If the control for switching the switching valve 66 is performed by a well-known method from the control device side of the machine tool, it can be easily achieved.
• a seal 68 is attached around the through hole 5 to prevent air leakage.
• a pair of pressing pieces 70, 70 for applying a pressing action to the upper surface of the pressing element 32 are provided on both sides of the seal 68.
• the pair of pressing pieces 70 and 70 may have a structure in which a sphere is embedded in the lower surface of the pressing end 42.
• the seal 68 is formed by a ring-shaped member made of rubber, synthetic resin, or the like, and is fixed by a screwing method or an adhesive method so as to surround the through hole 54. It may be provided so that it adheres and seals to the upper surface.
• a machine tool base a cam provided on the machine base
• a spindle head that moves in the same direction and has a tool spindle part
• a cam follower that is pivotally attached to the spindle head and that engages and disengages the cam at one end, and presses at the other end.
• a lever having an end, and a tool attachment / detachment mechanism for a machine tool, wherein a pivoting movement of the lever activates an attachment / detachment operation at a tool gripping end of the tool spindle by a pressing end at the other end.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Auxiliary Devices For Machine Tools (AREA)
• Automatic Tool Replacement In Machine Tools (AREA)
• Gripping On Spindles (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=14478947

Family Applications (1)

Country Status (2)

Citations (2)

• 1987
  • 1987-07-16 JP JP1987108215U patent/JPS6416238U/ja active Pending
• 1988
  • 1988-07-15 WO PCT/JP1988/000706 patent/WO1989000478A1/ja unknown

Patent Citations (2)

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