JPH0720206U - Tool holder - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a tool holder that allows easy and easy adjustment work of the tool protrusion length by the tool presetter while the tool is still attached to the holder. A tool rear end positioning member 16 is movably provided along a central axis of the holder main body 12 inside a holder main body 12 having a chuck 11 for fixing a tool 24, and the tool rear end positioning member 16 is also provided. There is provided a spring 17 for urging the holder 11 from the fixed position toward the chuck 11.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a tool holder in which a tool rear end positioning member is provided inside a holder main body having a chuck for fixing a tool.

[0002]

[Prior art]

 A conventional tool holder of this type will be described with reference to FIG. 5. In FIG. 5, reference numeral 1 denotes a holder main body of the tool holder, which is provided with a collet chuck 2 at a front end thereof. The tool rear end positioning member 3 is screwed and fixed so that movement of the holder main body in the axial direction can be adjusted. Further, a hexagonal hole 5 for rotating operation is provided inside the tool rear end positioning member 3.

Therefore, when mounting the tool 4, the tool rear end positioning member 3 is rotated from the outside of the holder body 1 by using the hexagonal hole 5 to roughly perform positioning, and then the chuck 2 is mounted. After loosening, the shank portion 4a of the tool 4 is inserted into the chuck 2 and the rear end thereof is brought into contact with the tip of the tool rear end positioning member 3. In this state, set the tool holder on the tool presetter, measure the protruding length of the tool 4, and make sure that there is no error between the measured value and the preset value for the tool presetter. In some cases, the tool 4 is once pulled out from the chuck 2, the tool rear end positioning member 3 is rotated from the outside of the holder main body 1, and then the tool 4 is again inserted into the chuck 2 and the tool presetter is used. The protrusion length is measured, and when the measured value finally matches the set value, the chuck 2 is tightened to fix the tool 4. In this way, the tool holder to which the tool 4 is fixed is set on the machine tool.

[0004]

[Problems to be solved by the device]

 In the conventional tool holder, when mounting the tool, when positioning the tool with the tool rear end positioning member by using the tool presetter and adjusting the protruding length of the tool, as described above, When measuring with the setter, insert the tool into the holder, and if the measured value does not match the set value, you have to remove the tool and rotate the tool rear end positioning member until it matches. It takes a lot of time and labor for the adjustment work, which causes a large decrease in work efficiency.

In view of the above problems, it is an object of the present invention to provide a tool holder that can easily and easily adjust the protruding length of the tool while the tool is attached to the holder.

[0006]

[Means for Solving the Problems]

 In the tool holder according to claim 1 of the present invention, a tool rear end positioning member 16 is provided inside a holder body 12 having a chuck 11 for fixing a tool 24 so as to be movable along a central axis of the holder body 12. In addition, a spring 17 for urging the tool rear end positioning member 16 from a fixed position on the holder body 12 side toward the chuck 11 is provided.

In the tool holder according to the second aspect, the tubular member 15 is fixed in the holder body 12 so as to be movable in the axial direction, and the tool rear end positioning member 16 is provided in the tubular body 15. While being slidably fitted along the central axis of the tool, the tool rear end positioning member 16 is inserted between the tool rear end positioning member 16 and the tubular member 15 from the tubular member 15 toward the chuck 11. A spring 17 for biasing in the protruding direction is provided.

[0008]

【Example】

 An embodiment will be described with reference to FIGS. 1 to 4. As shown in FIG. 3, the tool holder 10 includes a cylindrical holder body 12 having a collet chuck 11 at the tip and a manipulator gripping portion 13. And a taper shank 14. Inside the holder main body 12, a cylindrical tubular member 15 having a male screw 15a to be screwed with the female screw 12a on the inner peripheral surface is formed on the outer peripheral surface, and the cylindrical member 15 has a cylindrical shape. The tool rear end positioning member 16 is slidably fitted along the central axis of the tubular member 15 (which is also the central axis of the holder body 12), and the tool rear end positioning member 16 and the tubular shape A compression coil spring 17 for urging the tool rear end positioning member 16 in a direction projecting from the tubular member 15 toward the collet chuck 11 is interposed between the member 15 and the member 15.

The collet chuck 11 has a well-known structure. The collet chuck 11 is formed on the outer circumferential surface of the tip of the holder body 12 and the collet 19 fitted to the outwardly expanding tapered surface 18 formed on the inner circumferential surface of the tip of the holder body 12. The tightening nut 21 is screwed into the male screw 20 and is engaged with the tip of the collet 19.

The outer peripheral surface of the tool rear end positioning member 16 on the tip end side is formed to have a diameter larger than the inner diameter of the tubular member 15, and the central step portion 22 of the outer peripheral surface and the tubular member 15 are formed. The spring 17 is interposed between the tip surface and the end surface. A conical recess 23 for receiving the rear end of the tool 24 and a hexagonal hole 25 for rotation operation, for example, a hexagonal hole 25 are concentrically formed at the front end of the tool rear end positioning member 16, and a cylinder is formed at the rear end. A lock pin 26 for setting the projection limit position of the tool rear end positioning member 16 from the tip of the member 15 and connecting the tool rear end positioning member 16 and the tubular member 15 so as to be integrally rotatable is attached.

As will be apparent from FIGS. 1, 2 and 4, the lock pin 26 is inserted into a pin hole 27 diametrically formed at a rear end required portion of the tool rear end positioning member 16. Now, the protrusions at both ends are engaged with the pair of slide guide grooves 28, 28 formed in the rear end of the tubular member 15 in the axial direction by notches, whereby the tool rear end positioning member 16 and The tubular member 15 is integrally rotatably connected, and the tool rear end positioning member 16 is slidable with respect to the tubular member 15 within a predetermined stroke s. An O-ring 29 for sealing is attached to the inner peripheral surface of the tubular member 15.

In order to mount the tubular member 15 and the tool rear end positioning member 16 inside the holder body 12, a compression coil spring 17 is interposed between these members 15 and 16 and a lock pin 26 is attached. Then, these are inserted into the inside of the holder main body 12 from which the collet chuck 11 is removed, and the hexagonal hole 25 of the tool rear end positioning member 16 is used to rotate the positioning member 16 from the outside with an appropriate rotating operation tool. Therefore, the male screw 15a of the tubular member 15 may be screwed with the female screw 12a inside the holder body 12. In this case, the tool rear end positioning member 16 is coarsely positioned so that it can be compressed by the abutment of the tool 24 rear end by the above-described rotation operation.

In the use of the tool holder 10 described above, when presetting the tool protrusion length from the tool holder 10 using the tool presetter TP as shown in FIG. 3, as shown in FIG. The taper shank 14 of the tool holder 10 is fitted to the spindle 31 of the presetter body 30, and the pull bolt 32 protruding from the taper shank 14 and the pull bolt retracting means connected to the spindle 31 are connected to each other, as is well known in the art. Thus, the taper shank 14 is pulled into the spindle 31 to set the tool holder 10.

The shank portion 24 a of the tool 24 is inserted into the collet chuck 11 of the tool holder 10 set in the tool presetter main body 30 in this manner, and the rear end thereof is brought into contact with the tip concave portion 23 of the tool rear end positioning member 16. State. At this time, the collet chuck 11 is left loose to allow the tool 24 to move axially with respect to the collet chuck 11, and the tool rear end positioning member 16 has the rear end of the tool 24 abutting against the front end recess 23. In this state, pre-position the tool so that the protruding length is appropriately longer than the preset value. This positioning may be performed by appropriately rotating the tool rear end position determining member 16. The tool may be inserted into the chuck 11 in advance before the tool holder 10 is set on the tool presetter TP side.

In the state as described above, the stylus 33 of the tool presetter TP is moved upward and downward (in the direction of the central axis of the spindle 31) and in the direction intersecting with the direction of the central axis of the spindle 31, the movement operating knobs 34, While moving the stylus 33 while moving the stylus 33, the stylus 33 is positioned on the central axis of the spindle 31 as shown in the phantom line in FIG. The stylus 33 is brought into contact with the tip of the tool 24 by gradually moving downward along the central axis line from a position higher than the height position corresponding to the set value. At this time, when the stylus 33 contacts the tip of the tool 24, the tool protrusion length is still longer than the set value. Therefore, the stylus 33, which is in contact with the tip of the tool 24, is moved down to the height position corresponding to the set value. The downward movement of the stylus 33 causes the tool 24 to push the tool rear end positioning member 16 that is in contact with the rear end thereof against the biasing force of the compression coil spring 17 (see FIG. 2), thereby causing the tool 24 to move. The protrusion length of is equal to the set value. By tightening the collet chuck 11 of the tool holder 10 in this matched state, the tool 24 is attached and fixed to the projecting length according to the set value.

Alternatively, the stylus 33 is first lowered to a height position corresponding to the set value, and the tool 24 is opposed to the urging force of the compression coil spring 17 so that the tip of the tool 24 contacts the stylus 33. Then, the tool 24 may be pushed down by hand, the tip end of the depressed tool 24 may be brought into contact with the stylus 33, and the collet chuck 11 may be tightened at the contact position. In any case, the tool 24 can be easily and easily attached to the tool holder 10 without removing the tool 24 from the tool holder 10 or rotating the tool rear end positioning member 16 as in the conventional case. Tool protrusion length can be preset.

In presetting the tool protrusion length by the tool presetter TP, the tool rear end positioning member 16 is rotated by rotating the tool rear end positioning member 16 to change the fixed position of the tubular member 15. The position of can be changed and adjusted significantly. The rotation operation of the tool rear end positioning member 16 can be easily performed by engaging the rotation operation tool with the hexagonal hole 25 from the outside of the holder body 12 with the collet chuck 11 removed.

In the embodiment described above, the tubular member 15 is fixed inside the holder body 12 so as to be movable in the axial direction, and the tool rear end positioning member 16 is provided in the center of the holder body 12. It is slidably fitted along the axis, and the tool rear end positioning member 16 is inserted between the tool rear end positioning member 16 and the tubular member 15 in the direction of projecting from the tubular member 15 toward the chuck 11. Although the compression coil spring 17 is provided, the cylindrical member 15 can be omitted if the position of the tool rear end positioning member 16 does not need to be significantly changed. The end positioning member is mounted inside the holder body 12 so as to be movable along the central axis thereof, and the tool rear end positioning member is moved from the fixed position in the holder body 12 to the chuck 11 side. A spring for urging the spring may be provided.

[0019]

[Operation and effect of the device]

 According to the tool holder of the first aspect of the present invention, the tool rear end positioning member inside the holder body is movable within a certain range along the central axis of the holder body, and is constantly moved from a fixed position on the holder body side by the spring. Energized towards the chuck. Therefore, when mounting the tool on this tool holder, when presetting the tool protrusion length from the tool holder using the tool presetter, place the shank of the tool inside the chuck of the tool holder set on the tool presetter. After inserting the tool, contact the rear end of the tool with the tool rear end positioning member, loosen the chuck, and move the tool axially.In this state, move the stylus of the tool presetter from the appropriate height position to the tool. By touching the tip and pushing down the tool against the biasing force of the spring, lower the stylus to the height position corresponding to the preset value of the tool protrusion length preset in the tool presetter. The tool protrusion length matches the set value, and by tightening the chuck of the tool holder in this matched state, It can be attached and fixed to the tool to the projecting length of the set value as. In this case, first lower the stylus to the height position corresponding to the set value, and then press down the tool manually against the biasing force of the spring so that the tip of the tool contacts the stylus. The tip of the tool may be brought into contact with the stylus, and the collet chuck may be tightened at the contact position.

Therefore, according to this tool holder, the tool can be simply attached to the tool holder without removing the tool from the tool holder and rotating the tool rear end positioning member each time as in the conventional case. The tool protrusion length can be preset easily, and the work efficiency can be greatly improved.

According to the tool holder of the second aspect, the position of the tool rear end positioning member can be significantly adjusted by changing the fixed position of the tubular member. Also, when this tubular member is screwed and fixed inside the holder body, the screw hole portion for mounting the tool rear end positioning member provided inside the holder body of the conventional holder should be screwed on to the tubular member. It can be used as a hole.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a tool holder showing an embodiment of the present invention.

FIG. 2 is a vertical sectional view similar to FIG. 1, showing a state in which a tool rear end positioning member that is in contact with the tool rear end has moved against the biasing force of a spring.

FIG. 3 is a side view showing a usage state of the above tool holder.

FIG. 4 is a cross-sectional view taken along the line AA of FIG.

FIG. 5 is a vertical sectional view showing a conventional tool holder.

[Explanation of symbols]

 10 Tool Holder 11 Chuck 12 Holder Body 15 Cylindrical Member 16 Tool Rear End Positioning Member 17 Spring 24 Tool

Claims (2)

[Scope of utility model registration request] 1. A holder rear end positioning member is movably installed along a central axis of the holder main body in a holder main body equipped with a chuck for fixing a tool, and the tool rear end positioning member is located on the holder main body side. A tool holder characterized by comprising a spring for urging the chuck from its fixed position toward the chuck. 2. A tubular member is fixed inside the holder body so as to be movable in the axial direction, and a tool rear end positioning member is slidably fitted in the tubular member along the central axis of the holder body. A spring, which is inserted between the tool rear end positioning member and the tubular member, for urging the tool rear end positioning member in a direction projecting from the tubular member toward the chuck. The tool holder described in 1.