JP2000135604A - Machining method using tool holder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To carry out heavy cutting while interference with the tail stock of a tool main spindle is being avoided. SOLUTION: A tool holder 22 provided with a holder main body 25 having a holder axial line 24 coinciding with the axial line 23 of a tool main spindle 21, and with a cutting tool 26 mounted to the holder main body 25 in such a way as to be intersected with the axial line 24 of the holder main body 25, is mounted to the aforesaid tool main spindle 21, and machining is conducted while the tool main spindle 21 is fixed obliquely in such a way that the axial line 27 of the aforesaid cutting tool 26 forms a right angle against the axial line 28 of a main spindle 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machining method using a tool holder mounted on a tool spindle.

[0002]

2. Description of the Related Art FIG. 4 shows a conventional tool holder, for example. The tool holder 51 includes a tool spindle 52
Main body 5 having a holder axis coinciding with axis 53 of
1a and a cutting tool 51b having an axis parallel to the holder main body 51a.

The tool spindle 52 is fixed so that its axis 53 is perpendicular to the axis 57 of the spindle 58 of the chuck 55. The tailstock 59 is arranged so that its axis is coaxial with the axis 57 of the main shaft 58.

In machining using the conventional tool holder 51, as shown in FIG. 4, the tool spindle 51b is cut so that the cutting tool 51b is cut below the work 54 and sent to the left in the drawing. By moving the workpiece 52, the workpiece 54 is cut.

[0005]

In the above-mentioned conventional configuration,
Since the vertical distance (overhang amount) r1 from the support portion of the tool holder 51 by the tool spindle 52 to the tip of the cutting tool 51b becomes longer, when heavy cutting is performed, the cutting reaction force F is increased.
And the bending moment acting on the tool holder 51 increases. Therefore, there is a problem that heavy cutting cannot be performed with the above-described conventional configuration.

In order to solve this problem, as shown in FIG. 5, it is conceivable to fix the tool spindle 52 so that its axis 53 is substantially parallel to the axis 57 of the spindle 58. In this configuration, since the overhang amount r2 of the tool holder 51 is short, even if the cutting reaction force F increases, the bending moment acting on the tool holder 51 does not increase, and heavy cutting can be performed. The processing direction (the left-right direction in which the cutting tool 50 is pressed against the work 54 in the drawing) is the direction in which the tool holder 51 is clamped.

However, in the configuration shown in FIG. 5 in which the tool spindle 52 is fixed so that the axis 53 of the tool spindle 52 is substantially parallel to the axis 57 of the spindle 58, the tool spindle 52 is fixed to the tailstock 59. The problem of interference occurs.

The present invention has been made in view of the above circumstances, and provides a machining method using a tool holder capable of performing heavy cutting while avoiding interference of a tool spindle with a tailstock. The purpose is.

[0009]

According to a first aspect of the present invention, there is provided a holder body having a holder axis coinciding with the axis of a tool spindle, and a cutting tool attached to the holder body so as to intersect the axis of the holder body. A tool holder provided is mounted on the tool spindle, and the tool spindle is machined by being obliquely fixed such that the axis of the cutting tool is perpendicular to the axis of the spindle.

[0010]

According to the working method using the tool holder according to the present invention, the cutting tool is attached to the holder body so that the axis of the cutting tool and the axis of the holder body intersect, and the axis of the cutting tool is aligned with the axis of the main shaft. Since the tool spindle is fixed at an angle so that it is at a right angle to the processing, the dimension from the cutting edge of the cutting tool to the mounting part of the holder body (overhang amount)
4 can be made shorter than that shown in FIG. 4, and even if the cutting reaction force F increases due to heavy cutting, the bending moment acting on the holder body does not increase, and heavy cutting can be performed.

Further, the overhang amount becomes longer than that shown in FIG. 5, and it is possible to prevent the holder main body from interfering with the tailstock at the time of machining.

[0012]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIGS. 1 to 3 are views for explaining a processing method using a tool holder according to an embodiment of the present invention. FIGS. 1 and 2 are schematic perspective views and schematic views of an NC lathe using the tool holder. FIG. 3 is a front view of a main part of the NC lathe.

In FIGS. 1 and 2, reference numeral 1 denotes an NC lathe for cutting a work. The NC lathe 1 has a chuck 3 for gripping a workpiece W1 on the left side of the bed 2 when viewed from the front of the machine.
a tailstock 4 provided with a tailstock shaft 20 for pressing and supporting the work W1 on the right side.
A schematic structure in which the tool rest 5 is disposed so as to be movable in the axial (left / right) direction and the tool rest 5 is disposed in the back side between the main shaft 3 and the tailstock 20 so as to be movable in the Z axis and X axis (front and rear) directions. Have.

The periphery of the NC lathe 1 is surrounded by a cover 10, and a working opening 10a having an opening width extending over the main shaft 3 and the tailstock 4 is formed in a front portion of the cover 10. On the front left side of the opening 10a is a slide door 11 for opening and closing the main shaft 3 side part, and on the right side is a tailstock 4
A slide 12 for opening and closing the side portion is slidably disposed to the left and right. Reference numeral 14 denotes an operation panel, which is arranged on the right side of the work opening 10a.

The right sliding door 12 has a structure in which an inner panel 12a and an outer panel 12b made of a steel plate are joined in a middle state.
Are slidably supported by door rails 13 arranged at the upper edge and the lower edge. The left sliding door 11 has the same structure as the right sliding door 12.

As shown in FIG. 3, a tool spindle 21 is mounted on the tool rest 5 such that the angle θ of the spindle 3 with respect to the axis 28 of the spindle 3 can be changed.
2 is detachably mounted by a clamp mechanism (not shown).

The tool holder 22 includes the tool spindle 21.
A holder main body 25 having a holder axis 24 coinciding with the axis 23, and a cutting tool 26 fixed to the holder main body 25. The holder main body 25 has a taper portion 25a fitted and inserted into a taper hole 21a of the tool spindle 21, and a holder portion 25b to which the cutting tool 26 is fixed.

The cutting tool 26 is attached and fixed to the holder body 25 such that the axis 27 of the cutting tool 26 intersects the axis 24 of the holder body 25 at 45 °. The tool spindle 21 has an axis 23 and an axis 2 of the spindle 3.
8 is fixed to be 45 °.
Thereby, the axis 27 of the cutting tool 26 and the axis 28 of the main shaft 3 are orthogonal to each other.

A tool holder 22 constructed as shown in FIG.
When machining the work W1 by using the tool spindle 2, the axis 27 of the cutting tool 26 is perpendicular to the axis 28 of the spindle 3.
1 is fixed so that the angle θ becomes 45 °, and while the workpiece W1 is turned by the main spindle 3, the cutting tool 26 is cut in the X-axis (front-rear) direction by the tool main spindle 21 and in the Z-axis (left-right) direction. send. Thus, the turning of the work W1 is performed.

As described above, in the present embodiment, the tool holder 22 is attached to the holder main body 25 so that the axis 27 of the cutting tool 26 and the axis 24 of the holder main body 25 intersect with each other. The tool spindle 21 is fixed obliquely so that the axis 27 of the tool 3 is perpendicular to the axis 28 of the spindle 3, so that the dimension from the cutting edge of the cutting tool 26 to the support portion of the holder body 25 (overhang amount) )
4, the bending moment acting on the holder body 25 does not increase even if the cutting reaction force F increases, and heavy cutting can be performed without any trouble. Since the length can be longer than that shown in FIG. 5, it is possible to prevent the holder main body 25 from interfering with the tailstock at the time of processing.

[Brief description of the drawings]

FIG. 1 is a perspective view of an NC lathe in which a processing method using a tool holder according to an embodiment of the present invention is performed.

FIG. 2 is a schematic front view of the NC lathe.

FIG. 3 is a front view showing a processing state using the tool holder.

FIG. 4 is a front view showing a processing state of a conventional NC lathe.

FIG. 5 is a front view showing a machining state capable of solving the problems of the conventional NC lathe.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Tool spindle 22 Tool holder 23 Tool spindle axis 24 Axis of holder main body (holder axis) 25 Holder main body 26 Cutting tool 27 Axis of cutting tool

Claims (1)

[Claims] 1. A tool holder having a holder body having a holder axis coinciding with an axis of a tool spindle and a cutting tool attached to the holder body so as to intersect with the axis of the holder body is mounted on the tool spindle. A machining method using a tool holder, wherein the machining is performed by fixing the tool spindle at an angle so that the axis of the cutting tool is perpendicular to the axis of the spindle.