JPS6029386Y2 - tool holding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tool holding device used for attaching and detaching a tool or a tool holder to a face plate of a machine tool.

In machine tools where tools are mounted using the face plate method,
It is customary to install a tool mounting section on the face plate or on a slide plate attached to the face plate, and manually rotate the collar to attach and detach the tool.

This tool mounting part is difficult to perform automatic tool changes,
Conventional automatic exchange devices are for machine tools having a spindle hole, and there are almost no devices for the face plate type.

The purpose of the present invention is to provide a tool holding device that is attached to the surface of a face plate type machine tool, such as a front boring machine, to facilitate automatic tool changing. A tool or a tool holder is inserted into a main body having a mounting base and a cylindrical part following it so as not to be relatively rotatable, and the tool or tool holder is attached to the main body by rotation of a predetermined angle of a collar that is screwed into the cylindrical part of the main body. A tool holding device that is attached to and detached from the main body cylindrical portion, the support shaft being fixed to the main body cylindrical portion and protruding at right angles to the axis of the cylindrical portion, and the operating member rotatably supported by the support shaft and having a tooth shape on the outer periphery. and
A tooth profile that meshes with the tooth profile of the operating member is formed on the collar so that both tooth profiles mesh with each other, and a clutch mechanism for transmitting rotational torque at a predetermined angle is formed on the open end of the operating member, and a clutch mechanism is formed on the open end of the operating member, and It is characterized by providing a compressed air jet hole inserted into the cylindrical portion.

The present invention will be explained in detail based on illustrated embodiments.

FIG. 1 is an external view of a face plate type 1 machine tool, for example, a front boring machine 2, with a tool attachment part 1 attached thereto. A tool mounting part 1 is disposed above, and a tool T mounted thereon processes a workpiece W.

As shown in FIG. 2, the tool mounting portion 1 includes a mounting base 1a that is fixed to the slide plate 4, and a cylindrical portion 1 that is integrated with the base 1a.
It has a main body 1c consisting of b.

A screw 1d is formed on the outer periphery of the free end of the middle cylinder part 1b, and a tool holder insertion hole 1e with a tapered surface inward from the end face of the middle cylinder part 1b is formed.
is formed.

The tool holder 5 having a shank portion 5a inserted into the insertion hole 1e has a flange 5b extending outward from the shank portion 5a, and a tool T is placed in a cylindrical portion 5c having a smaller diameter than the flange 5b.
It is designed to be attached.

As shown in FIGS. 3 and 4, cutouts 5d and 5e are formed in the flange 5b of the tool holder 5, and keys 6a and 6b attached to the end surface of the cylindrical portion 1b of the main body 1c and the notches 5d and 5 are formed in the flange 5b of the tool holder 5.
e is engaged to prevent relative rotation between the main body 1C and the tool holder 5.

Furthermore, the tool holder 5 is fastened to the main body IC by a collar 7, and the collar 7 has a screw 7a that is screwed into the outer thread 1d of the main body IC, and an annular groove 7b on the inner circumferential surface, and the inner circumferential surfaces face each other. Claw portions 7c and 7d are formed at the positions as shown in FIG.

To attach the tool holder 5 to the main body 1c, align the claws 7c and 7d of the collar 7 with the keys 6a and 6b of the main body 1C, and press the notches 5d and 5e of the flange 5b of the tool holder 5.
Insert it in alignment with the positions of the claws 7c and 7d.

As a result, the notches 5d and 5e of the tool holder 5 are connected to the main body IC.
The keys 6a and 6b are engaged.

When the collar 7 is rotated in one direction, the tool T is fixed by the screw 1d and the screw 7a, and the installation is completed.

In order to enable automatic exchange of the tool holder 5 with the tool T, the operating member of the collar 7 is supported by the main body IC.

As shown in FIG. 4, a support shaft 8 is fixed approximately at the center of the cylindrical portion 1b of the main body IC in a direction perpendicular to the axis of the main body IC, and a part of the outer circumference is connected to this support shaft 8 via a bearing 9. An operating member 10 in the shape of a bevel gear is rotatably supported.

A bevel gear 7e is formed on the end surface of the collar 7 on the face plate 3 side, and a bevel gear 7e is formed on the outer peripheral surface of the operating member 10 near the main body 1c.
A bevel gear 10a is formed which meshes with the gear e.

A notch 10b is formed in the free end of the operating member 10, forming a dog clutch connected to a tool changer during automatic tool change.

A small hole 8a is passed through the center of the support shaft 8, and this small hole 8a
communicates with the holder insertion hole 1e via a communication hole 1f formed in the main body 1c.

Compressed air is supplied to the small hole 8a during tool exchange, and chips adhering to the shank portion 5a of the tool holder 5 when the tool is inserted;
Used to blow away dust, etc. to the outside.

The bevel gear 1 of the operating member 10 is attached to the base 1a of the main body 1c.
A detent pin 11 that engages with the collar 7 to prevent the collar 7 from loosening is attached, and the engagement is released by a press pin 12 when exchanging tools.

FIG. 6 shows an additional device for automatically exchanging tools using the tool holding device 20 according to the present invention according to the above-described embodiment.

FIG. 6 shows a state in which the tool holding device 20 is attached to the slide plate 4 attached to the face plate 3 of the spindle head 22 of the front boring machine 2, and the operation box 3 is attached to the side of the column of the front boring machine 2.
0, the tool magazine 40 is attached.

This provides a so-called retrofitted structure that allows automatic tool exchange by using the normal front boring machine 2 as is.

A traversing block 32 that moves between the tool T side and the tool magazine 40 side by a reciprocating means such as a cylinder 31 is disposed inside the operation box 30, and a tool exchange arm 33 is attached to the traversing block 32. The arm 33 can move back and forth in the axial direction of the tool mounting section 1 and can also rotate about an axis parallel to this axis.

A rotatable connecting portion 34 is supported on the end surface of the traversing block 32 on the tool T side, and when the protrusion 35 at the tip of this connecting portion 34 engages with the notch 10b of the operating member 10, the connection is performed by a device (not shown). The portion 34 is rotated.

Next, to explain the above-mentioned tool exchange operation, the state shown in Fig. 6 is that when machining is completed, the face plate 3 stops rotating and is shaped into a fixed position, the slide plate 4 moves to the tool exchange position, and the operation box A transverse block 32 within the tool holding device 2
This shows that it is approaching 0.

When the transverse block 32 approaches further, the gripping portion of the exchange arm 33 grips the tool holder 5, and at the same time, the connecting portion 34 is also connected to the operating member 10.

Next, when the connecting portion 34 is rotated by a required angle and the operating member 10 is rotated, the collar 7 is rotated due to the engagement of the bevel gears 10a and 7e, and the tool holder 5 is loosened, and the key 6a,
The collar 7 stops at a position where the notches 5d and 5e of the flange 5b of the tool holder 5 match.

Subsequently, the arm 33 moves forward in the axial direction of the tool mounting section 1 to the position shown by the dashed line, and extracts the tool holder 5 with the tool T from the tool mounting section 1.

As the exchange arm 33 grips the tool holder 5 and rotates in the opposite direction, the transverse block 32 moves in the direction of the tool magazine 40 and accommodates the tool holder 5 in the empty space of the tool magazine 40 by conventional means.

The arm 33 receives a new tool holder with a tool from the tool magazine 40, inserts it into the tool mounting part 1 in the reverse order as described above, and sends compressed air from the connecting part 34 to the small hole 8a to clean the shank part 5a of the tool T. At the same time, the connecting portion 34 is rotated in the opposite direction to complete attachment of the tool holder.

In the above embodiment, the operating member 10 and the support shaft 8 were simply combined rotatably via the bearing 9, but they were screwed together with screws, and the pitch and direction of the screws were adjusted. Select and bevel gear for main body IC of color 7? at
When the operating member 10 is moved in the direction of the support shaft 8 in response to the movement in the axial direction by the bevel gears 7e and 10
It becomes possible to maintain the meshing state between a and a substantially constant.

With this, when the collar 7 is loosened, the gears 7e and 10a
There is no play between them, allowing accurate positioning.

As explained above, in the tool holding device according to the present invention, by providing the tool attachment/detachment operation member in the tool mounting portion, positioning and connection are facilitated during tool exchange, and the workability of tool exchange is improved.

In addition, the position of the compressed air supply small hole 8a can also be set to another position.

The arrangement of the embodiment is an example of a position selected to eliminate the need for machining the face plate and slide plate of the machine tool.

It goes without saying that the present invention can be modified in many other ways within the scope of the claims.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of a machine tool to which a tool holding device according to the present invention is attached, Fig. 2 is a longitudinal sectional view of the tool mounting part, and Fig.
A cross-sectional view along the line ■-■ in the figure, Figure 4 is IV-I in Figure 2.
FIG. 5 is a cross-sectional view taken along line V, FIG. 5 is an end view in the direction of line ■-■ in FIG. 4, and FIG. FIG. Reference numeral 1 is the tool mounting part, 1a is the base, 1b is the cylindrical part, 1c
is the main body, 1d is a screw, 1e is an insertion hole, 2 is a front boring machine, 3 is a face plate, 4 is a slide plate, 5 is a tool holder, 5a is a shank part, 5b is a flange, 5c is a cylinder part, 5d, 5
e is a notch, 6a, 6b are keys, 7 is a collar, 7a is a screw, 7b is an annular groove, 7c, 7d are claws, 7e is a bevel gear, 8 is a support shaft, 9 is a bearing, 10 is an operating member, 10a is a bevel gear , 10b is a notch, 11 is a rotation stop pin, 12 is a press pin, 20 is a tool holding device, 22 is a spindle head, 30 is an operation box, 40 is a tool magazine, T is a tool, and W is a workpiece.

Claims (1)

[Claims for Utility Model Registration] 1. A tool or a tool holder is inserted into a main body that has a mounting base fixed to a rotating face plate of a machine tool and a cylindrical part connected thereto so as not to be relatively rotatable, and is screwed into the cylindrical part of the main body. The tool holding device attaches and detaches the tool or the tool holder to and from the main body by rotating a mating collar at a predetermined angle, the tool holding device comprising: a support shaft fixed to the cylindrical part of the main body and protruding at right angles to the axis of the cylindrical part; an operating member rotatably supported by the support shaft and having a tooth profile on its outer periphery; the collar is provided with a tooth profile that meshes with the tooth profile of the operating member so that both tooth profiles engage; and an open end of the operating member. 1. A tool holding device, characterized in that a clutch mechanism for transmitting rotational torque at a predetermined angle is formed in the main body, and a compressed air jet hole communicating with the inside of the cylindrical portion is provided in the main body. 2. The operation member is screwed onto the support shaft fixed to the cylindrical main body, and the tooth profile of the operation member that engages with the collar is a bevel gear tooth profile, and the tooth profile follows the axial movement of the collar to maintain the engaged state. A tool holding device according to claim 1 of the utility model registration claim.