JPH0636706U - Tool holder mounting device - Google Patents

Abstract

(57) [Abstract] [Purpose] In a tool holder attaching device interposed between a spindle of a machine tool and a tool holder, an attaching / detaching operation of a normal type tool holder 24 having a taper shank portion 25 and a pull bolt 26. To be able to do it easily and efficiently. [Structure] A pulling-out / pushing-out means 30 of a taper shank portion 25 is capable of moving in the radial direction, a screw shaft 32 for moving the transverse moving body 31a in the radial direction, which is rotatable from the outside, and the tapered hole. 29 and lateral moving body 3
Extruder 3 loosely fitted so as to be movable in the axial direction with respect to 1a
3, the lateral moving body 31a engages with the pull bolt 26 protruding from the tip of the tapered shank portion 25 when the lateral moving body 31a moves in the centripetal direction, and the pulling cam surface 39 for pulling in the tapered shank portion 25 and the centrifugal movement. And a pushing cam surface 40 for pushing and moving the pushing tool 33 in the pushing direction of the tapered shank portion.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a tool holder mounting device interposed between a spindle and a tool holder for increasing a distance from a tip of a spindle of a machine tool to a tool.

[0002]

[Prior art and its problems]

 Basically, a tool holder for so-called long type tooling is an integral type that has a long shank body of the required length with a taper shank for attachment to the spindle at one end and a tool chuck at the other end. However, in order to be able to utilize a short-duration normal-type tool holder, as shown in FIG. 4, one end is provided with a mounting portion 1 for a machine tool spindle, and the other end is a short-duration normal-type tool holder. A tool holder mounting device 4 having a tool holder mounting portion 3 for detachably mounting the holder 2 has been developed.

A conventional tool holder mounting device 4 of this type has a taper shank portion 6 of a tool holder 2 fitted in a tapered hole 5 of a tool holder mounting portion 3 as shown in the figure, It was configured to be pulled in and fixed by a long drawing screw 8 passing through 7. More specifically, the attachment portion 1 to the main shaft has a pull bolt 10 removably screwed onto the tip of the tapered shank portion 9. The pull bolt 10 is removed and a large diameter hole for attaching the pull bolt is provided. 11 is inserted into a small-diameter through hole 12 penetrating the device body 7, and the tip screw shaft portion 8a of the pull screw 8 is inserted into the screw hole 13 provided in the taper shank portion 6 of the tool holder 2. By being screwed, the tapered shank portion 6 is drawn into the tapered hole 5 and fixed. Reference numeral 14 is a gripping portion for the tool changing manipulator formed adjacent to the tapered shank portion 9 of the apparatus body 7, and 15 is a similar gripping portion formed adjacent to the tapered shank portion 6 of the tool holder 2. Is. Reference numeral 16 is a tool chuck of the tool holder 2.

In the conventional tool holder mounting device 4 as described above, not only the pull bolt must be removed from the normal type tool holder 2 having a short length, but also the tool holder 2 can be attached to and detached from the mounting body 7. There was a drawback that it was troublesome. That is, when attaching / detaching the tool holder 2, it is necessary to attach / detach the pull bolt 10 on the apparatus body 7 side and attach / detach the pull screw 8, and when removing the tool holder 2, after removing the pull bolt 10, It was also necessary to hit the head of the pulling screw 8 which was properly unscrewed in the tool holder pushing direction to separate the tapered shank portion 6 of the tool holder 2 from the tapered hole 5.

[0005]

[Means for Solving the Problems]

 The present invention has been made to solve the above-mentioned conventional problems, and the features thereof are indicated by the reference numerals of the embodiments described later, the tool holder mounting device of the present invention is A tool holder mounting device 17 having a mounting portion 19 for a spindle of a machine tool at one end and a tool holder mounting portion 20 at the other end, wherein the tool holder mounting portion 20 is a tapered shank of a tool holder 24. The portion 25 is composed of a tapered hole 29 which can be fitted and removed in the axial direction, and a retracting and pushing-out means 30 of the tapered shank portion 25. The pulling-out and pushing-out means 30 includes a lateral moving body 31a which is movable in the radial direction, and A screw shaft 32, which moves the lateral moving body 31a in the radial direction and which can be rotated from the outside, is loosely fitted between the tapered hole 29 and the lateral moving body 31a so as to be movable in the axial direction. And a pull-out cam surface 39 for pulling in the tapered shank portion 25 by engaging the pull bolt 26 protruding from the tip of the tapered shank portion 25 when the lateral moving body 31a moves in the centripetal direction. It is characterized in that it is provided with a pushing cam surface 40 for pushing and moving the pushing tool 33 in the pushing direction of the tapered shank portion when moving in the centrifugal direction.

According to the second aspect of the present invention, a pair of left and right lateral moving bodies 31a and 31b are provided, and the lateral moving bodies 31a and 31b are interlocked with the screw shaft 32 in opposite directions. Reverse screw portions 32a and 32b are provided, and the push-out tool 33 is formed in a ring shape in which the pull bolt 26 penetrates the inside, and there are two radial positions between the ring-shaped push-out tool 33 and the pull bolt 26. Projections 38a, 38b are formed on the lateral moving bodies 31a, 31b so as to be loosely fitted in the projections 38a, 38b, and the pull-in cam surface 39 is provided on the inside of the projections 38a, 38b. But each is formed.

Further, in the present invention according to claim 3, an elastic body (rubber ring 41) for providing resistance to the axial movement of the pushing tool 33 is provided outside the ring-shaped pushing tool 33. Will be done.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the accompanying drawings. In FIG. 1A, reference numeral 17 denotes a tool holder mounting device of the present invention, in which one end of a device body 18 has a main shaft of a working machine. Is attached to the other end, and a tool holder attaching part 20 is provided at the other end. The attachment portion 19 to the main shaft is composed of a tapered shank portion 21 and a pull bolt 22, and a manipulator grip portion 23 is provided adjacent to the tapered shank portion 21. Reference numeral 24 denotes a tool holder that is detachably attached to the tool holder attachment portion 20 and is a conventionally known one that includes a taper shank portion 25, a pull bolt 26, a manipulator grip portion 27, and a tool chuck 28.

The tool holder mounting portion 20 will be described in detail with reference to FIGS. 1B, 2 and 3. In the tool holder mounting portion 20, the taper shank portion 25 of the tool holder 24 is axially insertable and detachable. The taper hole 29 and the pull-in / push-out means 30 for the tapered shank portion 25 are provided. The pull-in / push-out step 30 includes a pair of left and right lateral moving bodies 31a and 31b which are movable in the radial direction, a single screw shaft 32 for interlocking the lateral moving bodies 31a and 31b in opposite directions, and the taper. The ring-shaped push-out tool 33 is loosely fitted between the cylindrical hole 29 and the lateral moving bodies 31a and 31b so as to be movable in the axial direction.

The ring-shaped extruding tool 33 is loosely fitted so as to be axially movable in an axial passage 34 having a circular cross-section that is concentrically provided continuously from the inner end of the tapered hole 29, and the inside thereof is the tool. The pull bolt 26 of the holder 24 penetrates. The lateral moving bodies 31a and 31b are provided in the device main body 18 so as to communicate with the rear end portion of the axial passage 34 in a state of being respectively screwed into the opposite threaded portions 32a and 32b of both ends of the screw shaft 32. Key grooves 37a, 37b are provided which are inserted into the diametrical through holes 35 having a circular cross section, and which are fitted into the detent keys 36a, 36b respectively locked to the apparatus main body 18 side. Rotational operation square holes 32c and 32d are provided at both ends of the screw shaft 32, and a hexagon wrench is fitted into the square holes 32c or 32d to rotate the screw shaft 32 in the forward direction. By moving 31a and 31b interlockingly in the centripetal direction approaching each other and rotating in the opposite direction, both lateral moving bodies 31a and 31b can be moved in the centrifugal direction in which they are separated from each other.

Protrusions 38a, 38b that are fitted between the ring-shaped push-out tool 33 and the pull bolt 26 are formed at the inner ends of the lateral moving bodies 31a, 31b. As shown in FIG. A pull-in cam surface 39 capable of contacting the pull-in inclined outer peripheral surface 26a of the pull bolt 26 is formed on the inner side of the pull-out bolts 38a, 38b, and a ring-shaped push-out is formed on the outer side of each of the protrusions 38a, 38b. A pushing cam surface 40 is formed which can be in contact with the pushing inclined inner peripheral surface 33 a of the tool 33. Although not shown in FIGS. 1B and 2, as shown in FIG. 3, the outer peripheral surface of the ring-shaped push-out tool 33 is pressed against the inner surface of the axial passage 34 which is loosely fitted so as to be axially movable. By mounting the rubber ring 41 through the circumferential groove, a proper resistance is given to the axial movement of the ring-shaped extruding tool 33, so that the ring-shaped extruding tool 33 can be moved by gravity or vibration. It is possible to prevent axial loosening inside. Of course, a C-shaped spring may be used in place of the rubber ring 41, and these rubber ring 41 and C-shaped spring may be attached to the inner surface side of the axial passage 34. You can also

When the tool holder 24 is attached to the tool holder attaching device 17 configured as described above, the pair of left and right lateral moving members 31a and 31b move away from each other as shown in FIG. In a state in which the pushing cam surfaces 40 of 38a and 38b push the ring-shaped pushing tool 33 toward the tapered hole 29, the tapered shank portion 25 of the tool holder 24 is inserted into the tapered hole 29, The push-out tool 33 is inserted to a position where the outer end surface of the pushing tool 33 and the tip end surface of the tapered shank portion 25 come into contact with each other. At this time, the pull bolt 26 of the tool holder 24 penetrates through the ring-shaped push-out tool 33 and enters into a position between the lateral moving bodies 31a and 31b.

In such a state, the screw shaft 32 is rotated in the forward direction to move the two lateral moving bodies 31a and 31b in the centering direction in which they approach each other, and the tool holder 24 is pushed in the axial direction by hand to When the pulling cam outer surface 26a of the pull bolt 26 of the tool holder 24 is clamped from both sides by the pulling cam surfaces 39 of the protrusions 38a, 38b of the horizontal moving bodies 31a, 31b, both the horizontal moving bodies 31a thereafter. , 31b are moved in the centripetal direction so that the pull-in cam surfaces 39 pull the tool holder 24 axially through the pull-in inclined outer peripheral surface 26a of the pull bolt 26, and as shown in FIG. The tapered shank portion 25 of the above is press-fitted and fixed in the tapered hole 29. At this time, the ring-shaped push-out tool 33 is pushed in the axial direction by the tip end surface of the tapered shank portion 25 of the tool holder 24 that is pulled in in the axial direction, and moves inward, so that the inclined inner peripheral surface 33a for pushing out. , Are fitted on the protruding portions 38a, 38b of the lateral moving bodies 31a, 31b.

The tool holder mounting device 20 with the tool holder 24 mounted as described above uses the mounting portion 19 for the spindle to mount it on the spindle of the machine tool in the same manner as when mounting a general tool holder. Can be installed. When removing the tool holder 24 from the tool holder attaching device 20, contrary to the above, the screw shaft 32 is operated to rotate in the opposite direction, and the both lateral moving bodies 31a and 31b are interlockedly moved in the centrifugal direction separating from each other. As a result, as shown in FIG. 3, the protrusions 38a, 38b of the lateral moving bodies 31a, 31b move laterally away from the pull bolt 26 of the tool holder 24, and at the same time, the pushing cams of the protrusions 38a, 38b. The surface 40 comes into pressure contact with the inclined inner peripheral surface 33a for extrusion of the ring-shaped extrusion tool 33, and pushes the ring-shaped extrusion tool 33 toward the taper-shaped hole 29. Therefore, the tool holder 24 is axially pushed out from the tapered hole 29 by the ring-shaped pushing tool 33. If the tool holder 24 is pushed out a little, it is sufficient to finish the rotation operation of the screw shaft 32 and pull out the tool holder 24 in the axial direction.

As shown in FIG. 3, the push cam surfaces 40 of the protrusions 38a and 38b of the lateral moving members 31a and 31b are separated from the push-out inclined inner peripheral surface 33a of the ring-shaped push-out tool 33. It is possible to provide a stopper that abuts on the lateral moving bodies 31a and 31b when the lateral moving bodies 31a and 31b move apart to the position, and prevents further moving away from the lateral moving bodies 31a and 31b. This stopper can be replaced by a stopper that prevents the ring-shaped pusher 33 from moving beyond the fixed position toward the tapered hole 29.

[0016]

[Operation and effect of the device]

 As described above, according to the tool holder attaching device of the present invention, a normal tool holder having a pull bolt at the tip of the taper shank portion is used as it is, and the taper shank portion of the tool holder is used as the tool holder attaching portion. After fitting in the tapered hole, the screw shaft of the pull-in / push-out means is rotated to move the lateral moving body in the centripetal direction, and the pulling cam surface of the horizontal moving body is made to act on the pull bolt. The tapered shank of the holder can be pulled in and fixed in the tapered hole.

Further, even when removing the tool holder, it is possible to rotate the screw shaft of the pull-in / push-out means to move the laterally moving body in the centrifugal direction, and the pushing-out tool of the laterally moving body can be used to push the tool. By pushing and moving the holder in the pushing direction, the taper shank portion of the tool holder can be pushed out from the tapered hole by the pushing tool.

As described above, when the tool holder is attached or detached, it is only necessary to rotate the screw shaft in the pull-in / push-out means, and it is not necessary to hit the tool holder when the tool holder is detached. Therefore, the attachment / detachment operation of the tool holder can be performed easily and efficiently. It is extremely practical as it is possible to use a normal tool holder equipped with a taper shank and pull bolts. Further, since it is not necessary to machine deep holes through the main body of the apparatus, the processing cost of the main body of the apparatus is low even when a long apparatus main body is required.

[Brief description of drawings]

FIG. 1 is a plan view showing a state in which a mounting device and a tool holder are separated from each other, and FIG. 1 is a partially cutaway side view of a main part in a state where the mounting device and the tool holder are connected to each other.

2 is a cross-sectional plan view of FIG. 1B.

FIG. 3 is a partially cutaway side view of a main part for explaining a state when the tool holder is removed.

FIG. 4 is a partially longitudinal side view illustrating a conventional example.

[Explanation of symbols]

 17 Tool Holder Mounting Device of the Present Invention 18 Device Main Body 19 Mounting Part for Main Axis 20 Tool Holder Mounting Part 21 Tapered Shank Part 22 Pull Bolt 23 Manipulator Grip Part 24 Tool Holder 25 Tapered Shank Part 26 Pull Bolt 26a Inclined Outer Surface 27 for Manipulator Gripping part 28 Tool chuck 29 Tapered hole 30 Pull-in / push-out means 31a Horizontal moving body 31b Horizontal moving body 32 Screw shaft 32a Reverse screw part 32b Reverse screw part 33 Ring-like push-out tool 33a Pushing inclined inner peripheral surface 38a Projecting part 38b Projecting part 39 Pulling Cam surface 40 Cam surface 41 for extrusion Rubber ring

Claims (3)

[Scope of utility model registration request] 1. A tool holder mounting device having a mounting portion for a spindle of a machine tool at one end and a tool holder mounting portion at the other end, wherein the tool holder mounting portion comprises:
The taper shank portion of the tool holder is composed of a tapered hole that can be freely inserted and removed in the axial direction, and a retracting and pushing out means of the taper shank portion. An externally rotatable screw shaft for moving in the radial direction, and a pusher loosely fitted between the tapered hole and the lateral moving body so as to be movable in the axial direction, the lateral moving body has a centripetal center. Cam surface for pulling in the taper shank portion by engaging the pull bolt protruding from the tip of the taper shank portion when moving in the direction, and pushing cam surface for pushing the pusher tool in the pushing direction of the taper shank portion when moving in the centrifugal direction. A tool holder mounting device provided with and. 2. A pair of right and left lateral moving bodies are provided, a reverse screw portion for interlocking the lateral moving bodies in opposite directions is provided on the screw shaft, and the pull bolt penetrates the inside of the pushing tool. A ring-shaped protrusion is formed on each of the lateral moving bodies so as to be loosely fitted at two diametrical positions between the ring-shaped pusher and the pull bolt, and the pulling cam is provided inside the protrusion. The tool holder mounting device according to claim 1, wherein each of the surfaces is formed with the pushing cam surface on the outside. 3. The tool holder mounting device according to claim 2, wherein an elastic body that gives resistance to axial movement of the pushing tool is provided outside the ring-shaped pushing tool.