JPH0680505U - Rotary tools for rotary cutting equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a rotary tool that can be attached to a rotary cutting device and easily realize precise cylindrical cutting on the outer peripheral surface of a work. A rotary tool (10) detachably mounted on a rotary spindle (12) of a rotary cutting device such as a machining center via a shank (14), wherein a cutter body (18) having a cutter (20) at one end is attached to the rotary tool (10). Is arranged on the outer periphery of the cylindrical holder portion 16 in such a manner that the movement thereof in the axial direction can be adjusted, and the cutter body 18 is slightly inclined with respect to the rotation axis L of the holder portion 16 to cut the cutting end portion 20a of the cutter 20. Is configured so as to be directed to the extension axis L of the holder portion 16.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rotary tool capable of easily realizing precise cylindrical cutting by a rotary cutting device such as a machining center.

[0002]

[Prior art]

 Known examples of rotary cutting devices that perform various cutting processes on a required work with a rotary tool include a milling machine, a boring machine, and a machining center capable of automatically exchanging a large number of tools. When a cylindrical recess is cut on the work with these rotary cutting devices, for example, a milling machine or boring machine is preferably used. A drilling machine is generally used to form a hole in the workpiece.

[0003]

[Problems to be solved by the device]

 As mentioned above, there are many rotary cutting devices and rotary tools mounted on the device for cutting a recess or forming a hole with a required diameter in a work, as described above. No problem. However, when it comes to a device that cuts the outer circumference of the work with a rotary tool, the number thereof is considerably limited. For example, in the past, in order to cut the outer surface of a work, it has been the practice to use a milling machine equipped with a plane cutter or to perform side milling with an end mill. Of course, this makes it possible to sufficiently cut the outer surface of the work, but since multiple lines of cutting marks are created on the outer surface of the work after cutting, it cannot be used directly for finishing work such as precision parts. There are difficulties.

To finish the surface of such precision parts, a lot of time and effort is required such that the works are attached one by one to a chuck of a lathe, precision cutting is performed with a cutting tool, and then buffing is performed. I need it. In particular, when the outer peripheral surface of a work having a cylindrical shape is precisely machined or precision-cut, the above-mentioned drawbacks of the conventional apparatus are remarkably highlighted.

[0005]

[The purpose of the device]

 The present invention has been proposed in order to solve the problems inherent in the rotary cutting device according to the above-mentioned conventional technique, and is proposed to suitably solve the problem. It is an object of the present invention to provide a rotary tool that can easily achieve precise cylindrical cutting.

[0006]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems and preferably achieve the intended purpose, the present invention is a rotary tool that is detachably mounted on a rotary spindle of a rotary cutting device such as a machining center via a shank. A cutter body with a cutter formed at one end is arranged on the outer periphery of the cylindrical holder part of the rotary tool so that the movement of the cutter body in the axial direction can be adjusted, and the cutter body is slightly arranged with respect to the rotation axis of the holder part. The cutting end of the cutter is inclined, and the cutting end is directed to the extension axis of the holder.

[0007]

【Example】

 Next, a rotary tool of a rotary cutting device according to the present invention will be described below with reference to the accompanying drawings with reference to a preferred embodiment. FIG. 1 shows a schematic structure of a rotary tool according to a preferred embodiment of the present application. A rotary tool indicated by reference numeral 10 is attached to and detached from a rotary spindle 12 of a rotary cutting device represented by a machining center via a taper shank 14. It is designed to be installed freely. The rotary tool 10 is basically composed of the shank 14 for mounting the tool and a cylindrical holder portion 16 provided on the other end side with the shank 14 aligned with the central axis line. A cutter body 18 having the shape shown in the figure is disposed on the outer periphery of the so as to be movable and adjustable in the axial direction. Then, the cutter body 18 has a cutter 20 formed at one end thereof, and is attached so as to be slightly inclined with respect to the rotation axis of the cylindrical holder portion 16 so that the cutting end portion 20a of the cutter 20 is cut. It is directed to the extension axis L of the holder portion 16.

That is, as shown in a perspective view in FIG. 2, on the outer periphery of the cylindrical holder portion 16 of the rotary tool 10, there is provided a long groove 24 inclined with respect to the rotation axis L so as to become deeper toward the tip side. Has been drilled. The cutter body 18 having a prismatic shape is tightly accommodated inside the long groove 24 and is movable in the axial direction. The cutter body 18 is provided with, for example, two through holes 26, 26. Therefore, by inserting the bolts 28 inserted through the respective long holes 26 into the screw holes 30 corresponding to the bottoms of the long grooves 24, the cutter body 18 is formed into the long groove of the cylindrical holder portion 16. It is fixed to 24 so that its position in the axial direction can be adjusted. By accommodating the cutter main body 18 in the inclined long groove 24 in this manner, the cutter 20 formed at one end of the cutter main body 18 and extending downward from the holder 16 has a cutting end portion as shown in FIG. 20a is oriented to the extension axis L of the holder portion 16. The mounting position of the cutting end 20a on the cutter 20 is oriented in the rotational direction of the cylindrical holder 16 as shown in the plan view of FIG.

Then, the bolt 28 is loosened with respect to the screw hole 30, and the cutter body 18 is moved back and forth along the slanted long groove 24 by a small amount, so that the cutting end portion 20 a of the cutter 20 uses the extension axis L as a reference. As a result, it is possible to arbitrarily adjust the distance to / from the axis L. The cutter body 18 is securely fixed to the long groove 24 of the cylindrical holder portion 16 by tightening the bolt 28 after adjusting the optimum inward amount of the cutting end portion 20a in this manner.

Next, the actual use of the rotary tool according to the embodiment thus configured will be described. As shown in FIG. 1, in order to precisely cut the cylindrical surface of the work 32, the work 32 is securely fixed in an upright state by a clamp means (not shown). At this time, the central axis of the cylindrical portion 32a of the work 32 can be aligned with the vertical rotation axis L of the rotating tool 10 according to the present embodiment. Further, it is assumed that the cutter 20 extending downward from the rotary tool 10 faces the position where the cutting end 20a reaches the virtual finished surface of the cylindrical portion 32a of the work 32.

In such a state, if rotation of the rotary tool 10 is started and the tool 10 is vertically lowered as shown in FIG. 3, the rotary tool 10 turns around a vertical rotation axis L at a predetermined radius. The cutting end portion 20a of the cutter 20 starts cutting the cylindrical portion 32a of the work 32 as shown in FIG. Then, as shown in FIG. 5, when the rotary tool 10 has descended to the required machining area, the rotary tool 10 starts to rise together with the cutter 20, and then repeats this. Then, after the cylindrical portion 32a is cut for the required time, the cutting is finished. If the cutting end portion 20a is worn by cutting for a long time or cutting a large amount of work, desired machining accuracy cannot be maintained. At this time, the bolt 28 may be loosened by the above-described procedure, the cutter body 18 may be extended downward in the long groove 24 of the cylindrical holder portion 16 and then the cutter body 18 may be re-tightened. Further, if a machining center is used as the rotary cutting device and a means for clamping the work 32 is attached to an automatic posture changing mechanism such as an indexing machine, various works other than the cylindrical portion 32a of the work 32 can be lengthened. The great advantage is that it can be carried out continuously over time.

[0012]

[Effect of device]

 As described above, the rotary tool of the rotary cutting device according to the present invention can easily realize precise cylindrical cutting on the outer peripheral surface of the work. In addition to enabling precision cylindrical cutting with a rotary cutting device such as a machining center, which has been difficult to achieve in the past, by combining the rotary cutting device with an index board that indexes the work clamper for fixing the work at the required angle, It enables long-term continuous machining operation. Therefore, a lot of time and labor can be saved, which contributes significantly to cost reduction as a whole.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing a schematic structure of a rotary tool according to a preferred embodiment of the present application.

FIG. 2 is a perspective view of a rotary tool according to a preferred embodiment.

FIG. 3 is a plan view of a rotary tool according to a preferred embodiment.

FIG. 4 is a state diagram in which cutting of a work is about to be started by the rotary tool according to the preferred embodiment.

FIG. 5 is a diagram showing a state where a work is cut by a rotary tool according to a preferred embodiment.

FIG. 6 is a state diagram in which the rotary tool according to the preferred embodiment has finished cutting the work and has returned to the cutting start position.

[Explanation of symbols]

 10 Rotary Tool 12 Rotating Spindle 14 Shank 16 Cylindrical Holder 18 Cutter Main Body 20 Cutter 20a Cutting End 24 Long Groove 28 Bolt L Rotating Axis of Holder

Claims (2)

[Scope of utility model registration request] 1. A rotary tool (10) detachably mounted on a rotary spindle (12) of a rotary cutting device such as a machining center via a shank (14), wherein a cutter (20) is formed at one end thereof. The cutter body (18) is arranged on the outer periphery of the cylindrical holder portion (16) of the rotary tool (10) so that the cutter body (18) can be moved and adjusted in the axial direction, and the cutter body (18) has the holder portion (16). ) Slightly inclined with respect to the rotation axis (L), the cutting end portion (20a) of the cutter (20), the holder portion (16)
A rotary tool for a rotary cutting device, which is configured to be oriented in the extension axis (L) of the. 2. A long groove (24) inclined with respect to the rotation axis (L) is bored in the longitudinal direction on the outer periphery of the cylindrical holder portion (16), and the cutter body (18) has the long groove (24). The rotary tool for a rotary cutting device according to claim 1, wherein the rotary tool is housed in a movable member (24) in the axial direction and fixed by a fixing means (28) such as a bolt so that the position in the axial direction can be adjusted.