JPH0775909A - Machining device - Google Patents

Abstract

PURPOSE:To provide a machining device which precisely machines the end face, the inner periphery and the outer periphery of a work in a high speed. CONSTITUTION:A tool rest 3 with a rotary cutter 3a such an end mill is provided on the opposite side of a work W which is rotated while being held by a spindle table 1. The rotary cutter 3a is arranged at an given inclination thetato the rotational center axial line O1-O1 of the work W. In this way, when machining the end face, the inner periphery and the outer periphery of the work W, the rotary cutter 3a which is provided in contact with time work W, mainly at the edge of the tool end from the beginning of cutting is reduced in cutting resistance and prevented from vibration.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an end surface of a cylindrical work,
The present invention relates to a processing device capable of processing an inner peripheral surface and an outer peripheral surface with high precision and at high speed.

[0002]

2. Description of the Related Art Conventionally, a machining apparatus of this type has a headstock 10 and a cutting table 11 as shown in FIG. 2. The headstock 10 rotates a cylindrical work W while holding it by a chuck 10a, while cutting the table. Reference numeral 11 is provided so as to be capable of reciprocating toward the work W set on the chuck 10a of the headstock 10 and along the end surface of the work W, and the tool rest 12 is placed on the cutting table 11. ing.

The tool rest 12 is a rotary cutting tool 12 such as an end mill.
It is configured to rotate while supporting a, and the rotary cutting tool 12a is arranged parallel to the rotation center axis O ₁ -O ₁ of the work W.

In this processing apparatus, when processing the inner or outer peripheral surface of the work W, the work W and the rotary cutting tool 12a rotate and the cutting table 11 faces the work W as shown in FIG. 2 (a). Rotating blade tool 12 while moving
When a cuts the inner peripheral surface or the outer peripheral surface of the work W and processes the end surface of the work W, the work W and the rotary cutting tool 12a rotate as shown in FIG.
While 1 moves along the end surface of the work W, the rotary cutting tool 1
2a cuts the end surface of the work W.

The machining apparatus shown in FIG. 3 includes a fixed blade 13 such as a cutting tool in place of the rotary blade 12a. In such a processing apparatus, only the work W rotates and the tip of the fixed blade 13 rotates. Cuts the outer peripheral surface of the work W.

[0006]

However, in the conventional processing apparatus as shown in FIG. 2, the rotary cutting tool 12a is arranged parallel to the rotation center axis O ₁ -O _{1 of the} work W as described above. Therefore, when machining the end surface, the inner circumference, or the outer peripheral surface of the work W, in any case, the rotary blade 12a comes into contact with the work W at the surface, so that a large cutting resistance is generated and the rotary blade 12a swings, End face of W,
It may not be possible to precisely cut the inner and outer peripheral surfaces.

Further, in the processing apparatus (see FIG. 3) having the fixed blade 13 such as a cutting tool in place of the rotary blade 12a, when the outer peripheral surface of the work W is processed, the fixed blade 13 does not rotate and only the work W is processed. Since it has a rotating structure, the only way to process the work W at a high speed is to rotate the work W at a high speed, and also to rotate the work W at a high speed while holding the work W which is not necessarily symmetrical to the rotation axis. In this case, since the rotation is disproportionate, the holding force is lost due to the centrifugal force of the disproportionately synthesized component during the rotation, the holding of the work W becomes unstable, and the work W cannot be processed precisely and at high speed.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an end surface of a cylindrical work,
An object of the present invention is to provide a processing device capable of processing the inner peripheral surface and the outer peripheral surface accurately and at high speed.

[0009]

In order to achieve the above object, the present invention is directed to a headstock for rotating a work while holding the work, and a rotation of an end mill or the like arranged at an angle with respect to a rotation center axis line of the work. A tool post that includes a cutting tool and that rotates while supporting the rotary tool, and a cutting table that mounts either one of the headstock or the toolboard and that processes a work of the headstock by the rotary tool of the tool post It is characterized by doing.

[0010]

According to the present invention, since the rotary cutting tool is arranged so as to be inclined with respect to the rotation center axis of the work, the end surface of the work,
When cutting the inner circumference or the outer circumference, in any case, the rotary cutting tool comes into contact with the work mainly at the edge portion of the tool tip.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a processing apparatus according to the present invention will be described below with reference to FIG.

The machining apparatus shown in FIG. 1 comprises a headstock 1 and a cutting table 2. The headstock 1 rotates while holding a cylindrical work W by a chuck 1a, while the cutting table 2 is attached to the chuck 1a of the headstock 1. Set work W
Is provided so as to be capable of reciprocating toward and along the end surface of the work W, and a tool rest 3 is placed on the cutting table 2.

The rotary tool 3 such as an end mill is provided on the side of the tool rest 3 facing the workpiece W which is rotated while being held as described above.
a, the rotary cutting tool 3a is inclined with respect to the rotation center axis O ₁ -O ₁ of the work W at a constant angle θ, and is detachably attached to the spindle 3b of the tool rest 3. There is.

The main shaft 3b of the tool rest 3 is rotatably supported by a known magnetic bearing (not shown), and is rotated by a drive motor (not shown) such as a high frequency motor.

Next, the operation of the processing apparatus configured as described above will be described with reference to FIG.

According to this processing apparatus, when processing the inner or outer peripheral surface of the work W, the work W and the rotary cutting tool 3a rotate, and the cutting table 2 moves toward the work W while the rotary cutting tool is moved. 3a cuts the inner peripheral surface or the outer peripheral surface of the work W. At this time, the rotary blade 3a moves the work W
Since they are arranged at a constant angle θ with respect to the rotation center axis line O ₁ -O _1, they contact the work W mainly at the edge portion of the tool tip from the beginning of cutting.

When the end surface of the work W is processed, the work W and the rotary blade 3a rotate and the cutting table 2
While moving along the end surface of the work W, the rotary blade 3a
Cuts the end surface of the work W. Even in such a case, since the rotary cutting tool 3a is arranged so as to be inclined at a constant angle θ with respect to the rotation center axis O ₁ -O ₁ of the work W as in the above case, the work W is mainly attached to the work W from the beginning of cutting. Touch at the edge of the tool tip.

In the processing of the end surface, the inner circumference or the outer peripheral surface of the work W, when the work W is processed at high speed, the rotation speed of the work W is not changed and the rotation speed of the rotary blade 3a is changed to rotate the work. The blade 3a is rotated at high speed.

Therefore, according to the processing apparatus of the above-described embodiment, since the rotary cutting tool is arranged so as to be inclined with respect to the rotation center axis of the work, in any case when cutting the end face, inner circumference or outer circumference of the work. Since the rotary blade comes into contact with the work mainly at the edge portion of the tool tip, the cutting resistance is small, the runout of the rotary blade is prevented, and the inner peripheral surface, the outer peripheral surface and the end surface of the work can be precisely cut.

Further, according to this processing apparatus, when the end surface, the inner circumference or the outer peripheral surface of the work is processed, not only the work but also the rotary blade is rotated, so that the work is not a work piece at a high speed. It is only necessary to rotate the rotary blade at high speed, especially when rotating the rotary blade at a high speed while holding the rotary blade that is a dedicated component for rotation, while rotating at a high speed while holding a workpiece that does not necessarily have a target shape with respect to the rotation axis. Compared to
There is no whirling due to non-uniformity during rotation, and the rotary blade is held stably, so that the work can be processed precisely and at high speed.

In the above embodiment, the rotary cutting tool 3a is arranged at a certain angle θ with respect to the rotation center axis O ₁ -O ₁ of the work W. However, instead of this, the work W is fixed to the rotary cutting tool 3a. It may be arranged to be inclined at a constant angle θ with respect to the rotation center axis line O ₂ -O _2, and in the case of such a configuration, the same effect as above can be obtained.

Although the tool rest 3 is placed on the cutting table 2 in the above embodiment, the headstock 1 may be placed on the cutting table 2 instead.

[0023]

In the processing apparatus according to the present invention, since the rotary cutting tool is arranged so as to be inclined with respect to the rotation center axis of the work as described above, the end surface, the inner peripheral surface or the outer peripheral surface of the work is formed. In any case, the rotary blade comes into contact with the workpiece mainly at the edge of the tool tip when cutting, so the cutting resistance is small, the runout of the rotary blade is prevented, and the inner peripheral surface, outer peripheral surface and end surface of the workpiece are precisely Can be cut into.

Moreover, according to this processing apparatus, when the inner peripheral surface, the outer peripheral surface or the end surface of the work is processed, not only the work but also the rotary blade is rotated, so that the work can be processed at high speed. Instead, it is only necessary to rotate the rotary blade at high speed.Especially, even if the rotary blade that is a dedicated part for rotation is rotated at high speed, the rotary axis is rotated at high speed while holding a workpiece that does not necessarily have a symmetrical shape. Compared with the case where the rotation is performed, there is no whirling due to imbalance during rotation, and the rotary blade is stably held, so that the rotary blade is stably held, so that the work can be processed precisely and at high speed.

[Brief description of drawings]

FIG. 1 is a plan view of a processing apparatus according to the present invention.

FIG. 2 is an explanatory view of a conventional processing device.

FIG. 3 is an explanatory view of a conventional processing device.

[Explanation of symbols]

 1 Headstock 2 Cutting table 3 Turret 3a Rotary cutting tool

Claims (1)

[Claims] 1. A headstock that rotates while holding a work, and a tool rest that includes a rotary cutting tool such as an end mill that is arranged to be inclined with respect to the rotation center axis of the work, and that rotates while supporting the rotary cutting tool. And a cutting table on which one of the headstock and the tool rest is placed and which is used for processing the work of the headstock by a rotary tool of the tool rest.