JPH1177411A - Tool holding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tool holding device that can replace cutting tools with ease and can accurately adjust the blade edge position of the replaced cutting tool with easy operation. SOLUTION: A fitting hole 3a is provided in an adapter 3 to be attached to a holder base 2 on the side of a tool holding device main body, and on the other hand, a fitting shaft section 4a is provided in a tool holder 4 for holding a cutting tool 6 such as a bit so that this fitting shaft 4a can be fitted into the fitting hole 3a of the adapter 3. In addition, an inclination face section (t) is provided in the top face of the fitting shaft section 4a, and a flat face section (h) is provided below the inclination face section (t). A screw adjusting hole (f) is provided facing the fitting hole 3a from the outer face of the adapter 3, and an adjusting screw 10 is screwed so that the projection quantity of the tool holder 4 can be adjusted with the tip of the adjusting screw 10 is brought into contact with the inclination face section (t). A fixing screw hole (k) is provided below the adjusting screw 10 and a fixing screw 11 is screwed into the hole (k), and the tip of the fixing screw 11 is pressed against the flat face section (h) for fixing the fixing screw 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tool holding device provided with a mechanism for adjusting the position of a cutting edge of a cutting tool such as a cutting tool in a lathe or the like.

[0002]

2. Description of the Related Art Conventionally, in a tool holding device for holding a cutting tool or the like for drilling a hole, for example, a device capable of rapidly changing a cutting tool has been proposed.
A device such as 15449 is known. In this device, an adapter is interposed between a spindle side (apparatus main body side) and a tool main body side (tool holder side), and a tip of a clamper housed in the adapter is engaged with the tool main body side, and the clamper is pivoted. The tool body is clamped or unclamped by moving the clamp body in this direction, and the movement of the clamper is performed by rotation of an eccentric lock pin provided on the adapter.

Further, as an apparatus capable of changing the cutting edge position of a cutting tool in the radial direction, for example, Japanese Utility Model Laid-Open No. 6-74.
No. 206 is known. In this device,
The fitting shaft portion of the tool holder (tool holder) is fitted and fixed to the fitting recess of the tool device body (device body side), and the center line of the fitting shaft portion is the rotation axis of the main shaft. When the tool holder is rotated around the center axis of the fitting shaft portion, the position of the cutting edge of the cutting tool can be changed in the radial direction.

On the other hand, as a device for changing the position of the cutting edge of a cutting tool in the axial direction, for example, a device as shown in FIG. 3 is known. When the cutting tool 52 is mounted on the tool holder 53, the device 51 adjusts the position of the cutting edge of the cutting tool 52, so that a spacer 55 is interposed between the tool holder 53 and the holder base 54 on the device body side. The thickness of the spacer 55 is adjusted to adjust the position of the cutting edge of the cutting tool 52.

[0005]

By the way, in a device such as a lathe, when a cutting tool such as a cutting tool is replaced due to wear, breakage, or the like, it is necessary to align the cutting edge position in the axial direction with the cutting edge position before replacement. It is necessary to perform such replacement work quickly, but in the case of Japanese Utility Model Publication No. 1-154949 or Japanese Utility Model Publication No. Hei 6-74206, neither axial edge adjustment is possible.

In the apparatus 51 shown in FIG. 3, after the cutting tool 52 is replaced, the tool holder 53 must be removed and the spacer 55 must be reinserted in order to adjust the position of the cutting edge. It takes time, and it is difficult to perform fine adjustment because stepless adjustment is not possible.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a tool holding device capable of easily changing a cutting tool and accurately adjusting the position of the blade edge of the replaced cutting tool by a simple operation.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an adapter which can be mounted on the apparatus body side and has a fitting hole, and a fitting shaft portion which can be fitted into the fitting hole of the adapter. In a tool holding device having a tool holder for holding a cutting tool, an adjusting mechanism for adjusting a cutting edge position of the cutting tool is provided in the adapter and the tool holder, and the adjusting mechanism is provided with a fitting shaft portion of the tool holder. An adjusting screw formed on at least a part of the upper surface of the adapter, an adjusting screw which is screwed into an adjusting screw hole formed in the adapter so as to be able to advance and retreat, and a tip end of which can contact the inclined surface of the tool holder; And a fixing screw which is screwed into the fixing screw hole formed to be able to move forward and backward and which can abut on the side surface of the fitting shaft portion of the tool holder.

When replacing the cutting tool, for example, the tool holder is removed from the adapter and replaced, and the fitting shaft portion of the tool holder replaced with the new cutting tool is fitted into the fitting hole of the adapter. The tip of the adjusting screw screwed in from the adjusting screw hole is brought into contact with the inclined surface on the upper surface of the fitting shaft, and by inserting and removing the adjusting screw, the tool holder can be moved in the axial direction (perpendicular to the adjusting screw). Move to adjust the amount of protrusion. When the position of the cutting edge of the cutting tool is adjusted by this adjustment, the side surface of the fitting shaft portion of the tool holder is pressed and fixed by the tip of the fixing screw screwed from the fixing screw hole of the adapter.

Here, for example, if a plurality of tool holders on which cutting tools are mounted are prepared in advance and the cutting tools are replaced, the replacement operation can be performed in a short time by replacing the entire tool holder. I can do it. At this time, it is preferable that the tip portion of the adjusting screw abutting on the inclined surface portion is tapered so as to abut in a stable state to increase the contact area. If the fitting shaft of the tool holder where the tip of the fixing screw contacts is cylindrical, etc., it is necessary to fit the tool holder as necessary to secure the tool holder by pressing the fixing screw. A part of the side surface of the shaft may be cut into a plane.

[0011]

Embodiments of the present invention will be described with reference to the accompanying drawings. Here, FIG. 1 is an exploded perspective view of the tool holding device according to the present invention, and FIG. 2 is an assembled sectional view thereof.

When the cutting tool 6 such as a cutting tool is replaced, the tool holding device 1 according to the present invention can accurately restore the cutting edge position of the cutting tool 6 to the cutting edge position before the replacement, and the operation is simplified. As shown in FIG. 1, a holder base 2 on the side of the apparatus main body, which is fastened and fixed to a spindle S (FIG. 2), and a holder base 2 as shown in FIG.
And a tool holder 4 which is fitted and fitted into and removed from the fitting hole 3a of the adapter 3, and a cutting tool 6 is attachable to the tool holder 4.

The adapter 3 and the tool holder 4 are provided with an adjusting mechanism 5 for adjusting the cutting edge position of the cutting tool 6 in the axial direction. The adjusting mechanism 5 moves the tool holder 4 in the axial direction. I can make it.

The holder base 2 is a perforated member having a substantially disk-like outer shape, has a through hole 2a at the center, and can be fitted into the recess of the spindle S (FIG. 2) at the center of the upper surface. It has a circular tapered projection 2b. A plurality of bolt holes b,... Are provided in a peripheral portion surrounding the protrusion 2b, and the hexagonal hole tightening bolts 7,. It can be tightened and fixed.

Further, on the side surface of the holder base 2, there is provided a screw hole a opening toward the center through hole 2 a, and the screw hole a has a hexagonal hole for fixing the adapter 3. The fixing bolt 8 can be screwed. An adapter 3 is provided at a predetermined position on the lower surface of the holder base 2.
A pin insertion hole d into which the upper end of the parallel pin 9 for ensuring the positioning of the pin is inserted is provided.

The adapter 3 has the fitting hole 3
a, and a small-diameter fitting cylindrical portion 3b is provided at the center of the upper surface. The fitting cylindrical portion 3b can be fitted into the through hole 2a of the holder base 2, and a hexagonal hole fixing bolt 8 is provided at a predetermined position on the side surface of the fitting cylindrical portion 3b.
A coupling concave portion e into which the tip of the above can be inserted is formed.

An adjusting screw hole f and a fixing screw hole k which constitute a part of the adjusting mechanism 5 are provided below the adapter 3. An adjusting screw 10 and a fixing screw 11 are provided respectively. Can be screwed in. Further, a pin fitting hole c into which the lower end of the parallel pin 9 can be fitted is provided in the peripheral edge of the upper surface of the adapter 3.

The lower side of the tool holder 4 has a substantially cylindrical shape with a slightly larger diameter than the upper side, and the upper side of the small diameter can be fitted into the fitting hole 3 a of the adapter 3. A part of the upper surface side of the fitting shaft part 4a is formed as an inclined surface part t by being cut off obliquely, and below the inclined surface part t, the outer periphery of the fitting shaft part 4a is formed. Is formed to form a flat portion h. The inclined surface portion t and the flat surface portion h are also configured as a part of the adjustment mechanism 5.

When the fitting shaft portion 4a of the tool holder 4 is fitted into the fitting hole 3a of the adapter 3, the inclined surface portion t is located on an extension of the adjusting screw hole f, and the flat surface portion h is provided. It is located on the extension of the fixing screw hole k.
Therefore, the adjusting screw 10 screwed into the adjusting screw hole f
Of the fixing screw 11 screwed into the fixing screw hole k can contact the flat surface portion h. The distal end of the adjusting screw 10 is tapered as shown in FIG. 2 so that the contact area with the inclined surface t is increased so that the adjusting screw 10 can abut in a stable state.

Further, two insertion holes n, n are provided obliquely below the tool holder 4, and these insertion holes n have one of the insertion holes n selected according to the working mode or the like. In order to be able to insert the cutting tool 6 into the
A plurality of screw holes i,... Are provided from the side surface of the tool holder 4 toward the inside of each of the insertion holes n, and set screws 12,. .

Next, a method of using the tool holding device 1 configured as described above, an operation thereof, and the like will be described with reference to FIG. During the cutting operation, the cutting tool 6 may be worn or damaged, or the work may be changed.
When it becomes necessary to replace the tool holder, the operator loosens the fixing screw 11 and takes out the tool holder 4.

When the set screw 12 of the tool holder 4 is loosened and the replacement of the cutting tool 6 is completed, the fitting shaft 4a of the tool holder 4 is inserted into the fitting hole 3a of the adapter 3, and the adjusting screw 10 is adjusted. After the amount of protrusion of the tool holder 4 is adjusted, when the cutting edge position of the cutting tool 6 is set at a predetermined position, the fixing screw 11 is tightened to fix the tool holder 4.

After the removal of the tool holder 4 as described above, instead of replacing the cutting tool 6 on the spot, the tool holder 4 on which the cutting tool 6 is mounted is replaced with the replacement tool holder 4 in advance.
If the tool holder 4 is removed, the replacement is completed only by inserting the prepared replacement tool holder 4, adjusting with the adjusting screw 10 and fixing with the fixing screw 11. Work can be performed in a very short time. At this time, the extracted cutting tool 6 of the tool holder 4 is replaced with a new one in a spare time.

With the above-described method, the cutting tool 6 can be replaced in a very simple procedure, and the cutting edge position of the cutting tool 6 can be efficiently and steplessly restored to the original cutting edge position in the axial direction. Can be done.

The present invention is not limited to the above embodiment. Those having substantially the same configuration as that described in the claims of the present invention and exhibiting the same operation and effect belong to the technical scope of the present invention. For example, the type, mounting method, and the like of the cutting tool 6 are arbitrary.

[0026]

As described above, the tool holding device of the present invention
The adapter and the tool holder are provided with an adjusting mechanism for adjusting the cutting edge position of the cutting tool. As the adjusting mechanism, the adjusting mechanism moves forward and backward on an inclined surface formed on the fitting shaft of the tool holder and an adjusting screw hole formed on the adapter. An adjusting screw that can be freely screwed and the tip part can be in contact with the inclined surface of the tool holder, and is screwed into a fixing screw hole formed in the adapter so that it can advance and retreat freely, and the tip part is the fitting shaft of the tool holder. Since it is composed of fixing screws that can contact the side of the part, it is possible to easily change the cutting tool,
Moreover, the cutting edge position in the axial direction of the cutting tool can be accurately restored to the cutting edge position before replacement.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a tool holding device according to the present invention.

FIG. 2 is a sectional view of the same assembly.

FIG. 3 is a configuration example diagram of a conventional tool holding device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Tool holding device, 3 ... Adapter, 3a ... Fitting hole, 4 ...
Tool holder, 4a: fitting shaft portion, 5: adjusting mechanism, 6: cutting tool, 10: adjusting screw, 11: fixing screw, f: adjusting screw hole, k: fixing screw hole, t: inclined surface portion.

Claims (1)

[Claims] An adapter that can be attached to the apparatus main body and has a fitting hole; a tool holder that has a fitting shaft portion that can be fitted into the fitting hole of the adapter and holds a cutting tool; The adapter and the tool holder are a tool holding device provided with an adjustment mechanism for adjusting a cutting edge position of the cutting tool, wherein the adjustment mechanism is provided on at least a part of an upper surface of a fitting shaft portion of the tool holder. A slant surface formed, an adjusting screw which is screwed into the adjusting screw hole formed on the adapter so as to be able to move forward and backward, and a tip end of which can abut on the slant surface of the tool holder; A tool holding device comprising a fixing screw which is screwed into a fixing screw hole so as to be able to move forward and backward, and a tip end of which can be brought into contact with a side surface of a fitting shaft portion of the tool holder.