JPH03184708A - Cutting work device - Google Patents

Abstract

PURPOSE:To reduce the times of a tool exchange and to improve the processing accuracy and productivity, by fitting a grooving tool to the outer peripheral part of a tool holder, in the cutting work device to which a perforating tool and spot facing tool, etc., are fitted at the tip of the tool holder. CONSTITUTION:This cutting device is used for a machining center and applied for the multi-spindle heat composed of a three-spindles. A perforating tool 7 is fitted to the tool holder 5 at the tip of the spindle. Also, a grooving tool 7 is fitted on the outer periphery of each tool holder 5. At the tip outer peripheral part of the tool holder 5, a large diameter part 5a is formed at the base end side and a small diameter part 5b at the tip side, and a step 5c is provided at the medium part thereof. A key groove and thread 5d are provided on the outer periphery of the small diameter part 5b. A pair of spacer members 9, 10 are provided at the front and back of the grooving tool 7 fitted to the small diameter part 5b by a key 8 and integrally locked by a locking nut 11.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cutting device in which a plurality of different types of cutting tools are attached to one tool holder to improve work efficiency.

(Prior Art) Conventionally, a plurality of holes H in a workpiece W as shown in FIG.
When machining grooves S on the inner circumferential surface of the machine, drilling, reaming, and tapping holes, use multiple tools such as drilling tools and grooving tools in separate tool holders while exchanging them. Or, it is constructed as a multi-axis head as shown in FIG. 8, and a plurality of drilling tools or grooving tools are attached at the same time for machining.

(Problem to be solved by the invention) However, when machining is performed while exchanging tools, the time required for exchanging tools may impede productivity, or chips may adhere to the tool attachment part of the holder during tool exchanging, resulting in Problems such as loss of accuracy and reduction in machining accuracy occurred.

On the other hand, when machining is performed using a multi-axis head, for example, grooving of three holes H, drilling and reaming of one hole are performed as in the case of the workpiece W shown in Fig. 6 above. In order to do this, five axes are required: a three-axis grooving tool 51, one drill 52 axis, and one leaf 53 axis, as shown in Figure 8, and the total weight of the head exceeds the constraint range. Therefore, it was necessary to use another multi-axis head. Therefore, there has been a problem that the equipment cost has increased.

(Means for Solving the Problems) In order to solve the problems, the present invention provides a cutting device in which a drilling tool, a counterbore tool, etc. is attached to the tip of a tool holder, and the present invention provides a cutting device in which a drilling tool, a counterbore tool, or the like is attached to the tip of a tool holder. A cleaning tool is attached to the tool holder.The outer circumference of this tool holder has a large diameter part on the proximal end and a small diameter part connected to the large diameter part with a stepped part, and this small diameter part has a keyway. A grooving tool to be keyed to the key was fixed via a spacer with a locking nut screwed into the threaded part.

(effect) Productivity is improved by reducing the number of tool changes.

Furthermore, the problem of incorrect installation accuracy when changing tools is eliminated, and machining accuracy is improved.

When a multi-axis head C is applied, the weight of the head does not increase, and equipment costs can be reduced.

(Example) An example of the cutting device of the present invention will be described based on the attached drawings.

FIG. 1 shows an embodiment of the cutting device of the present invention configured as a multi-axis head, and FIG. 2 is an enlarged view of the main parts.

The cutting device of the present invention is used in a numerically controlled machine tool of a machining center, and is applied to a multi-axis head 1 consisting of three spindle axes as shown in FIG.

That is, this multi-axis heald 1 is connected to the main shaft 2 side,
It is equipped with a drive shaft 3 rotated by a main shaft rotation mechanism, and the rotation of this drive shaft 3 is transmitted to three spindle shafts 4 through a gear train.
These spindle shafts 4 are rotated at the same time. A tool holder 5 is attached to each tip of the spindle shaft 4. In the case of this embodiment, a drill and a reamer are attached to the tips of the upper and lower tool holders 5 and 5 as drilling tools 6 on one side and on the other side, respectively, as shown in FIG.

A grooving tool 7 is attached to the outer periphery of each tool holder 5, and its assembly structure will be described in detail below with reference to FIG.

A mounting hole for mounting a drilling tool 6 such as a drill or a reamer is provided in the center of the front surface of the tool holder 5. For example, the drilling tool 6 is a tool having a tongue 6a and a tapered shank 6b. Accordingly, it is not necessary to provide a rotation locking screw or the like on the outer circumference of the tool holder 5.

A large diameter portion 5a is formed on the proximal end side, a small diameter portion 5b is formed on the distal end side, and a step portion 5C is formed in the middle of the outer peripheral portion of the tip of the tool holder 5.
is provided. A wooden keyway is engraved in the axial direction on the outer periphery of the small diameter portion 5b, and a threaded portion 5d is formed on the tip side.
is engraved.

A pair of spacer members 9, 10 are provided at the front and rear of the grooving tool 7, which is non-rotatably attached to the small diameter portion 5b of the tool holder 5 with a key 8, and a locking nut! It is integrally fixed by 1.

On the other hand, grooving with such a grooving tool 7 is performed by the third
This was done as shown in Fig.
Grooves S are formed on the inner circumferential surface by rotating each spindle shaft while rotating the multi-axis head 1 along the circular direction of the inner circumferential surface.

During this grooving process, the drilling tool 6 such as a drill or reamer only swings in the hole H, and as shown in the conventional example in FIG. Even if it is not positioned lower than the tool 51, it will not interfere with the workpiece W.

Furthermore, when machining a workpiece W having a shape as shown in Fig. 6, grooving of three holes H is performed at the same time. As shown in
After machining with a drill, finish machining is performed with a reamer.

FIG. 5 shows another example in which a counterboring tool 12 is provided in place of the drilling tool 6. In this case as well, as in the above example, a plurality of processing tools are attached to one spindle shaft. In either case, the number of spindle shafts that drive the tool can be reduced, and the apparatus can be simplified. Further, with a similar configuration, the counterbore tool can also be used as a tap tool or the like.

Although this example shows an example that is applicable to a multi-axis head, it is of course applicable to an axle as well. In this case, the number of tool changes can be reduced, and the accuracy of tool installation can be reduced. This eliminates problems such as variations in machining accuracy due to

(Effects of the Invention) As described above, since the cutting device of the present invention has a plurality of processing tools operated by one spindle shaft, the number of tool changes can be reduced and the processing time can be shortened. In addition, tool exchange eliminates problems with mounting accuracy and stabilizes machining accuracy.

Furthermore, when applied to a multi-axis head, it contributes to the weight reduction of the head and has the effect of not causing a rise in equipment costs.

[Brief explanation of drawings]

Fig. 1 is an overall view of a multi-axis head showing an embodiment of the cutting device of the present invention, Fig. 2 is an enlarged view of the main parts, and Figs. 3 and 4 are diagrams showing the working action of a grooving tool. , Fig. 3 is a longitudinal sectional view, Fig. 4 is a plan view of the same, Fig. 5 is an enlarged view of main parts when the processing tools are separate, Fig. 6 shows the workpiece, Fig. A is a front view, and Fig. B is a front view.
is a vertical sectional view, and FIGS. 7 and 8 show a comparison of the multi-axis head parts of a conventional example and an apparatus of the present invention. FIG. , respectively, are layout views seen from the front direction of each side view B. In the figure, 1 is a multi-axis head, 5 is a tool holder, 5a is a large diameter part, 5b is a small diameter part, 5C is a stepped part, 5d is a threaded part, 6
9. 10 is a spacer member, 11 is a locking nut, 12 is a counterbore tool, 51 is a grooving tool, W is a rigid material, and S is a groove. Figure 2 Figure 4 Figure 5 Figure 6 (A) (3) Figure 8 (B)

Claims (2)

[Claims] (1) A cutting device in which a drilling tool, a counterboring tool, etc. is attached to the tip of a tool holder, characterized in that a grooving tool is attached to the outer periphery of the tool holder. Processing equipment. (2) The tip of the tool holder is a small diameter portion that is connected to the large diameter portion on the proximal side with a step, and this small diameter portion is provided with a keyway and a threaded portion, and the grooving tool is inserted into the keyway. 2. The cutting device according to claim 1, wherein the cutting device is fixed by a locking nut screwed onto the threaded portion through a spacer.