JP2002172535A - Attachment for machine tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an attachment for a machine tool allowing a reliable adjustment of the orientation of a cutter while kept mounted on a spindle of a machine tool. SOLUTION: A locking member 17 arranged in a rotary casing 10 is, when in a rotary position X, engaged with a rotary engaging and disengaging portion 19 of a rotary shaft 4, and when in a fixed position Y, engaged with a fixed engaging and disengaging portion 31a to 31c of a fixed casing 30. When the locking member 17 is moved to the rotary position X, the rotary casing 10 having the cutter 14 is rotatable along with the rotation of the rotary shaft 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an attachment for a machine tool which is mounted on a main shaft of a machine tool and processes a workpiece with a cutting tool which is oriented in a direction intersecting with the axis of the main shaft.

[0002]

2. Description of the Related Art Conventionally, in machining a side surface and an inner surface of a work in a machine tool, an attachment for a machine tool having a cutting tool oriented in a direction intersecting with the axis of a spindle has been used. The attachment for the machine tool is disclosed in Japanese Patent No. 2744429.
As is known in the issue, while attached to the main shaft of the machine tool,
The direction of the cutting tool can be adjusted in a short time so as to correspond to a plurality of processing locations.

[0003]

The attachment for a machine tool will be described. A power shaft A, which is located on an extension of the spindle, is mounted on a casing mounted on the spindle head of the machine tool.
, A tool rotating shaft that intersects the power shaft A, and a power transmission mechanism that connects the power shaft to the tool rotating shaft. The casing includes a fixed casing which is prevented from rotating around the spindle head via a fixed block and a positioning pin, and a rotary casing in which the tool rotary shaft is provided.
An upper carbic B movable along the power axis A is provided in the fixed casing. As shown in FIG. 10, a piston 101 and a cam pin 1 are provided inside the rotary casing.
02 and a lower carbic C provided with an operating mechanism 100 constituted by springs 103 and 104 and the like.

Accordingly, when the upper carbic B is engaged with the lower carbic C, the rotating casing is prevented from rotating by the fixed casing, the piston 101 is retracted by the cam pin 102, and the metal 105 is separated from the power shaft A. The rotating casing is released from the power shaft A. Further, when the upper Kabikku B dissociated with lower Kabikku C (the state of FIG. 10), the rotating casing becomes a rotatable state, the cam pin 1 by the spring 104
02 is raised, the piston 101 is advanced by the spring 103, the metal 105 is pressed against the power shaft A, and the rotary casing is integrally connected to the power shaft A by the frictional force. When the power shaft A is rotated in this state, the rotation casing rotates to a predetermined index angle, so that the direction of the cutting tool can be adjusted.

However, when the operating mechanism 100 is repeatedly operated, the metal 105 is pressed against the power shaft A, and the spring force of the spring 103 for frictionally connecting the rotary casing and the power shaft A may be weakened due to fatigue or the like. There is. Then, when the power shaft A is rotated, a slip occurs between the power shaft A and the metal 105, and the rotating casing coupled to the power shaft A via the operation mechanism 100 does not accurately move to a predetermined index angle. There was a fear. A hydraulic cylinder is installed on the spindle head for raising and lowering the upper carbic B. The hydraulic cylinder is used only for the attachment for the machine tool. Problems such as the necessity of significant remodeling such as circuit piping have arisen, which has been a factor of making the machine tool expensive. Therefore, an object of the present invention is to provide an attachment for a machine tool in which the direction of a cutting tool is reliably adjusted while being attached to a main shaft of the machine tool. Another object of the present invention is to provide an attachment for a machine tool which does not require significant modification on the machine tool body side.

[0006]

In order to solve the above problems,
In the present application, a tool changer is used to mount a casing having a rotating shaft rotatably on a spindle, and a positioning pin provided on the casing is fitted into a positioning member installed on a spindle head, so that the casing has a spindle axis line. In a machine tool attachment in which the cutting tool is rotated in the circumferential direction and is fixed in a fixed direction in the circumferential direction, the casing is formed from a rotating casing provided with the cutting tool and a fixed casing provided with the positioning pin. configured, the movable locking member provided along the rotation axis rotating casing, a plurality of fixed-side engaging the inner side of the fixed casing detent in a fixed casing rotating casing engaged with the locking member removed Parts are provided at predetermined intervals in the circumferential direction, and the rotating shaft is engaged with the locking member to prevent the rotating shaft from rotating around the rotating casing. And a drive mechanism for moving the locking member in the axial direction between a fixed position for engaging the fixed side engaging and disengaging portion and a rotating position for engaging the rotating side engaging and disengaging portion. .

The driving mechanism includes an elastic member for urging the locking member in a direction engaging with the fixed side engaging / disengaging portion, and a movement for moving the locking member at the fixed position to the rotation position by the elastic force of the elastic member. And a mechanism. The moving mechanism is provided on the jig side.

[0008]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a machine tool attachment 1 in which a rotating shaft 4 is rotatably provided on a casing 2 via a bearing 3. This machine tool attachment 1
The tapered portion 4a at the end of the rotary shaft 4 is mounted in a tapered hole 5a formed at the tip of the main shaft 5 by means of a tool changing device (not shown), and the positioning pin 32 provided in the casing 2 is mounted on the main shaft head 6. The cutting tool 14 is attached to the casing 2 in a direction intersecting the main shaft 5 axis by being fitted into the positioning member 7, which is rotated by the rotary shaft 4.
Is fixed in a constant direction in the circumferential direction, so that the side surface and the inner surface of the work W can be processed. The machine tool attachment 1 is configured such that the direction of the cutting tool 14 can be surely adjusted so as to correspond to a plurality of processing locations while being attached to the main shaft 5 of the machine tool via the drive mechanism 8. I have.

First, the casing 2 of the machine tool attachment 1 will be described. Casing 2, positioning the rotating casing 10 to cutting tool 14 is provided a pin 3
2 is provided with a fixed casing 30 provided therein. As shown in FIG. 1, the rotary casing 10 has a shape in which a small-diameter portion 10b extends forward from a large-diameter portion 10a, and has a through hole 11 penetrating in the front-rear direction inside. The bearing 3 is installed in the through hole 11, and the rotating shaft 4 is rotatably supported by the bearing 3. At the end of the small diameter portion 10b of the rotary casing 10, a tool rotating shaft 12 provided with a bevel gear 12a is disposed via a bearing 13 in a direction intersecting (orthogonal) with the main shaft 5 axis, and a through hole 11 is formed from the small diameter portion 10b side. Plug member 22 is fitted so as to close the plug. A cutting tool (drill) 14 is attached to the tip end of the tool rotation shaft 12, and a bevel gear 12 a provided on the tool rotation shaft 12 is provided with a bevel gear 4 b provided at the tip of the rotation shaft 4.
And the rotational force of the main shaft 5 is transmitted to the tool rotating shaft 12 via the rotating shaft 4 and the bevel gears 4b and 12a,
The cutting tool 14 rotates for processing.

The large diameter portion 10a of the rotary casing 10 includes
An opening 15 opening outward in the radial direction is provided so as to be the same as the axial direction of the tool rotation shaft 12. The large-diameter portion 10 extends along the through-hole 11 so as to cross the opening 15.
There is provided a through hole 16 penetrating in the front-back direction of FIG. A locking member 17 having an engaging member 17 a is inserted into the through hole 16 so as to be movable along the axis of the rotating shaft 4, and is elastic so that the front end of the locking member 17 projects forward of the rotating casing 10. biased by member 18. On the rotating shaft 4,
A ring member 20 provided with a rotation side engaging / disengaging portion 19 comprising a groove in which the engaging member 17a of the locking member 17 is engaged is a key member 21.
Mounted through. As shown in FIG. 5, when the engaging member 17 a of the locking member 17 has been moved to the axial position (rotational position X) where the locking member 17 is engaged with the rotation-side engagement / disengagement portion 19, the rotating shaft 4 becomes Through the rotary casing 10. That is, by driving the main shaft 5, the direction of the cutting tool 14 provided on the rotary casing 10 via the rotary shaft 4 can be adjusted. In the present embodiment, the ring member 20 is provided with only one rotation-side engaging / disengaging portion 19;
A plurality of such as two or three places may be provided. Rotating casing 1
In the rear end of the large-diameter portion 10a, there is a fixed casing 3 described later.
A small-diameter relief portion 10c of the positioning key 34 provided at the position 0 is provided.

The fixed casing 30 will be described. The fixed casing 30 has a large diameter portion 10 of the rotating casing 10.
A stepped large-diameter hole 30a into which a is fitted is formed, and the rotary casing 10 is rotatably fitted into the stepped large-diameter hole 30a. At the stepped side of the large-diameter hole 30a, the engaging member 17 engages with the engaging member 17a of the engaging member 17 at the axial position (fixed position Y) where the elastic member 18 urges the engaging member 17 forward. The fixed side engaging / disengaging portions 31a to 31c formed of grooves are provided at predetermined intervals in the circumferential direction so as to correspond to the processing locations (as shown in FIG. 2,
In the present embodiment, three places). And the fixed side engaging / disengaging portion 31a
When the engaging member 17a of the locking member 17 is engaged with any one of the fixing members 17 to 31c, the rotating casing 10 is stopped from rotating by the fixed casing 30 via the locking member 17. That is, the driving of the main shaft 5 causes the cutting tool 14 provided on the rotary casing 10 via the rotary shaft 4 to undergo a processing rotation. The stationary casing 30 includes a positioning pin 32 that fits into the positioning member 7 installed on the spindle head 6.
The positioning pin 32 is urged rearward (toward the spindle head 6) by an elastic member 33. And positioning pin 3
A positioning key 34 is attached to a substantially intermediate portion of 2 so as to be orthogonal to the positioning pin 32. Further, in the present embodiment, as shown in FIG. 2, the fixed side engaging / disengaging portion 31
a is set to be arranged.

The operation of the machine tool attachment 1 configured as described above will be described. When the machine tool attachment 1 is housed in a tool magazine (not shown), as shown in FIG. 4, the positioning pin 32 is urged rearward (toward the spindle head 6) by the elastic member 33. 34 is a fixed groove 4c provided on the rotating shaft 4.
Is engaged. The locking member 17 is an elastic member 18
As a result, the rotating casing 10 is stopped by the fixed casing 30 and the rotating shaft 4 is stopped by the fixed casing 30 because the fixed casing 30 is engaged with the fixed side engaging / disengaging portion 31a (the initial processing is W1). ing. In this state, when it is mounted on the spindle 5 by a tool changer (not shown), the positioning pins 32 provided on the fixed casing 30 are fitted into the positioning members 7 installed on the spindle head 6 and are pushed forward, and the positioning is performed. The key 34 moves from the fixing groove 4c to the escape portion 10c (FIG. 1). At this time, the locking member 17
Is located at the fixed position Y, and the rotary casing 10 is stopped from rotating by the fixed casing 30 via the locking member 17. Thus, the cutting tool 14 provided on the rotary casing 10 via the rotary shaft 4 by driving the main shaft 5. Is rotated for processing, the processing of the processing location W1 is performed by moving the spindle head 6 forward and in the direction of the processing location W1. In addition, the positioning member 7 is set in advance so that the cutting tool 14 provided on the rotary casing 10 is at the position of the processing point W1 in a state where the locking member 17 is engaged with the fixed side engaging / disengaging portion 31a. 6 is installed.

As shown in FIG. 3, a work W
When there are a plurality of 1 to W3 and the processing of the processing location W1 is completed,
At the same time as the spindle head 6 is moved upward and backward L, the rotating shaft 4 is rotated to index and move the rotating side engaging / disengaging portion 19 to a position where the engaging member 17a of the engaging member 17 is engaged (FIG. 2).
State). Thereafter, the main shaft 5 (rotary shaft 4) is stopped, and the hydraulic cylinder 9 illustrated as a moving mechanism provided on the jig 40 side constituting the driving mechanism 8 is driven to be attached to the rod member 9a of the hydraulic cylinder 9. Moving member 9b to locking member 1
Move to a position facing 7. The moving member 9b is shown in FIG.
As shown in FIG. 3, the locking member 17 is semicircular so as not to interfere with the rotating casing 10, and the locking member 17 has a circular arc on the back surface between the rotation positions shown in FIGS. The guide surface 9c is movable. The spindle head 6
Is moved forward, the locking member 17 is pushed rearward against the elastic force of the elastic member 18 and moves from the fixed position Y to the rotation position X. The casing 10 is prevented from rotating around the rotating shaft 4, the rotating casing 10 is indexed and rotated via the rotating shaft 4 by driving the main shaft 5, and the direction of the cutting tool 14 provided on the rotating casing 10 is changed to the position shown in FIG. (Processing point W2). Furthermore, in the present embodiment, in order to adjust the orientation of the cutting tool 14 in a short time, without rotating indexing the blade from completely withdrawn from the processing hole Wa of the workpiece W in the axial direction, the processing point of the workpiece W (W1 to W
3) Since the index rotation is performed in the vicinity, during the index rotation, circular interpolation control is performed so that the top, bottom, left and right movements of the main shaft 5 are combined so that the tip of the cutting tool 14 does not interfere with the inner surface of the processing hole Wa of the work W. Is going.

Thereafter, the hydraulic cylinder 9 is driven to retract the moving member 9b, and the locking member 17 is moved from the rotation position X to the fixed position Y by the elastic force of the elastic member 18 constituting the driving mechanism 8. The rotation casing 10 that has been released from being stopped from rotating with the rotating shaft 4 is again prevented from rotating by the fixed casing 30 via the locking member 17. The cutting tool 14 provided on the rotating casing 10 is driven by the driving of the main shaft 5.
Is rotated for machining, so that the spindle head 6 is moved forward and the machining point W2.
By moving in the direction, the processing location W2 is processed. When the machining of the machining location W2 is completed, the spindle head 6 is moved upward and backward L, and at the same time, the rotating shaft 4 is rotated to engage the rotating side engaging / disengaging portion 19 with the engaging member 17a of the locking member 17. thereby indexing movement to the position (state in FIG. 7). Thereafter, the main shaft 5 (rotary shaft 4) is stopped, and the hydraulic cylinder 9 is driven to move the moving member 9b attached to the rod member 9a of the hydraulic cylinder 9 to a position facing the locking member 17. Then, by moving the spindle head 6 forward, the locking member 17 is pushed backward against the elastic force of the elastic member 18 to move from the fixed position Y to the rotation position X.
The rotating casing 10 is prevented from rotating around the rotating shaft 4, and the direction of the cutting tool 14 provided on the rotating casing 10 is moved to the position shown in FIG. Let it. Then, by moving the spindle head 6 to perform the processing of the processing location W3, all the processing of the workpiece W having the plurality of processing locations W1 to W3 is performed.

Accordingly, in the machine tool attachment 1 of the present embodiment, the locking member 17 which can be moved between the fixed position Y and the rotation position X by the drive mechanism 8 is connected to the rotary casing 1.
0, at the fixed position Y, the locking member 17 is engaged with any of the fixed side engaging / disengaging portions 31a to 31c of the fixed casing 30, and at the rotating position X, the locking member 17 is Since it is made to engage with the rotation side engagement / disengagement portion 19, there is no slip compared with the friction coupling between the rotating shaft (the power shaft A) and the rotating casing when indexing and rotating as in the related art. The rotating casing 10 moves together with the rotating shaft 4 so that the direction of the cutting tool 14 provided on the rotating casing can be adjusted. Also, by providing the moving mechanism 9 (hydraulic cylinder) of the drive mechanism 8 on the jig 40 side where it is easy to add piping and the like of the hydraulic circuit, a great remodeling can be achieved as compared with providing the hydraulic cylinder and the like on the machine tool body side. No need to do.

[0016]

As described above, according to the present invention, the locking member provided on the rotating casing is moved between the fixed position and the rotating position via the drive mechanism. The rotation casing is reliably rotated with the rotation of the rotation shaft in a state where the locking member is moved to the rotation position by being configured to engage with the rotation portion and the rotation side engagement / disengagement portion in the rotation position. Therefore, the direction of the blade provided on the rotary casing can be adjusted with high accuracy. Further, since the moving mechanism of the drive mechanism is provided on the jig side, it is not necessary to make a significant modification for providing the hydraulic cylinder on the spindle head.

[Brief description of the drawings]

FIG. 1 is a view showing a state in which a machine tool attachment of the present invention is mounted on a main shaft.

FIG. 2 is an enlarged sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view taken along line III-III of FIG. 1;

FIG. 4 is a view showing a state in which the machine tool attachment of the present invention is detached from the main shaft.

FIG. 5 is an enlarged view of a portion A in FIG. 1;

FIG. 6 is a diagram showing a state in which the attachment for a machine tool of the present invention adjusts a cutting tool via a driving mechanism.

FIG. 7 is a view showing a state in which the rotation-side engaging / disengaging portion is indexed and moved to a position where the engaging member engages with the engaging member of the locking member, and is a diagram in which the cutting tool is located at a processing location W2.

FIG. 8 is a view showing a state in which the rotation-side engagement / disengagement portion is indexed and moved to a position where the engagement member engages with the engagement member of the locking member, and is a view in which the cutting tool is located at a processing location W3.

FIG. 9 is a view showing a moving member.

FIG. 10 is a view showing an operation mechanism of a conventional attachment for a machine tool.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Attachment for machine tools 2 Casing 4 Rotating shaft 5 Spindle 6 Spindle head 7 Positioning member 8 Drive mechanism 9 Hydraulic cylinder 10 Rotating casing 14 Cutting tool 17 Locking member 18 Elastic member 19 Rotating side detachable part 30 Fixed casing 31a (31b, 31c) ) Fixed side engaging / disengaging part 40 Jig X Rotation position Y Fixed position

Claims (3)

[Claims] 1. A casing having a rotating shaft rotatably mounted on a main shaft by a tool changing device, and a positioning pin provided on the casing is fitted into a positioning member mounted on a main shaft head, so that the casing is mounted on the main body. In a machine tool attachment in which a cutting tool is attached in a direction intersecting with a main shaft axis and a cutting tool rotated by the rotation shaft is fixed in a fixed direction in a circumferential direction, a fixed casing provided with a rotating casing provided with the cutting tool and a positioning pin is provided. And a plurality of fixed sides which are provided on the rotating casing and which are movable along the rotation axis and which are engaged with the locking member inside the fixed casing to prevent the rotating casing from rotating around the fixed casing. Engagement / removal portions are provided at predetermined intervals in the circumferential direction, and the rotating shaft is engaged with the locking member to rotate the rotating shaft around the rotating casing. A drive mechanism is provided for providing a rotation side engagement / disengagement portion for stopping, and for moving the locking member in an axial direction between a fixed position for engaging the fixed side engagement / disengagement portion and a rotation position for engaging the rotation side engagement / disengagement portion. Attachment tool. 2. An elastic member for urging the locking member in a direction engaging with the fixed side engaging / disengaging portion, and a moving mechanism for moving the locking member at the fixed position to the rotation position by the elastic force of the elastic member. 2. A driving mechanism, comprising: a driving mechanism;
Attachment for machine tool as described. 3. The attachment for a machine tool according to claim 2, wherein the moving mechanism is provided on a jig side.