JP3231631B2 - Turret turret with turning mechanism for turret body - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turret tool post with a turning mechanism for a tool post main body, wherein the turning of the tool post main body about a vertical axis and the turning of a turret are performed by a single servomotor.

[0002]

2. Description of the Related Art In a machine tool such as a lathe, when a slanted hole Wa is formed in a work W by a rotary tool T mounted on a turret 101 as shown in FIG. 3, a tool rest main body 102 is perpendicular to the X and Z axes. By turning around the vertical axis (Y axis), the oblique hole W is formed by synchronous feed of the X axis and Z axis of the turret tool post.
Drill a. Therefore, B-axis control for turning the tool rest 102 around the Y-axis is required. Conventionally, as shown in FIG. 4, a servo motor 103 dedicated to the B-axis is provided on the tool post main body 102 separately from the turret turning servo motor, and
The tool rest body 102 is turned by engaging a gear 107 fixed to an output shaft 103 a of the B-axis servomotor 103 with a gear 105 fixed to a turning center 104 on the reference numeral 06.

[0003]

SUMMARY OF THE INVENTION B described in the prior art
The turret tool post, which has a dedicated servo motor for the axis,
There is a problem in that the shape becomes large, the weight increases accordingly, and the number of NC control shafts increases by one, resulting in high cost. SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to provide a small, lightweight, and compact turret and a B-axis turret. It is intended to provide a low-cost turret tool post.

[0004]

According to the present invention, there is provided a turret tool post with a turning mechanism for a tool post body according to the present invention.
A tool post body pivotable about a vertical axis perpendicular to the longitudinal feed axis of the lathe and a cutting axis perpendicular thereto, and a turret pivotable about a pivot center axis perpendicular to the pivot axis of the tool post body. In the turret tool post having
A turret turning means, a tool post main body turning means, a servomotor, and a switching means for selectively transmitting an output of the servomotor to one of the turret turning means and the tool post main body turning means; The turret and the tool rest main body are rotated by the servo motors.

[0005] A tool rest body which can be turned around a vertical feed axis of a lathe and a vertical axis which is perpendicular to a cutting axis which is perpendicular thereto, and a turning center axis which is perpendicular to a turning axis of the tool rest body. In a turret tool post having a swivelable turret, a servomotor that turns the turret and the tool post body alternately, a first clutch that can be disengaged to perform positioning clamp for turning the turret, and the first clutch , A first drive shaft rotated by the servomotor and axially moved by the drive device, and a turret fitted to one end of the first drive shaft and simultaneously with disengagement of the first clutch. A detachable shift gear that is disengaged from the drive gear, and is provided between the other end of the first drive shaft and the second drive shaft for turning the tool rest body; Disengageable second clutch for transmitting and releasing rotation from the first drive shaft to the second drive shaft at the same time as disengagement, and a tool rest body for turning the tool rest body by rotation of the second drive shaft Turning means,
When the first clutch is engaged, the second clutch is engaged and the shift gear is disengaged. When the first clutch is disengaged, the second clutch is disengaged and the shift gear is engaged. The turret and the tool rest main body are turned by one servomotor.

According to the turret tool rest configured as described above, the first drive shaft rotated by the servomotor is selectively transmitted to the turret turning means and the tool post body turning means. Therefore, it is possible to rotate the turret and the turret main body with a single servo motor, and it is possible to form a turret turret with a turning mechanism for the turret main body without being large and heavy. it can.

Further, according to the turret tool rest configured as described above, the axial movement of the first drive shaft is driven by the drive means for engaging and disengaging the turret clamp clutch. A single axial drive means is sufficient,
Further simplification and downsizing can be achieved.

[0008]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view showing the internal structure of a turret tool post with a turning mechanism of the tool post body of the present invention, and FIG.
FIG. 2 is a perspective view showing the appearance of the apparatus. A saddle 1 having a guide 1a in a cutting feed axis direction (X-axis direction) perpendicular to the Z-axis on a top surface of a bed (not shown) in a longitudinal feed axis direction (Z-axis direction) of a bed (not shown) is movably positioned. And saddle 1
The middle table 2 is mounted on the X-axis guide 1a so as to be movable and positionable.

A tool rest main body 3 is provided on the center base 2 so as to be able to turn around a turning center axis a in the vertical (Y-axis) direction, and a fixed gear 10 is fixed to the center of turning on the center base 2. ing. The turret body 3 is provided with a turret 4 which is rotatable around a horizontal rotation center axis b. A fixed clutch 5 having a crown tooth shape is mounted on a rotation shaft 4 a of the turret 4.
A is fixed. A hydraulic or pneumatic hydraulic cylinder 6 is concentric with the turning shaft 4a of the turret 4 in the tool rest body 3.
Is fixed to a tip of a piston rod 6a of the fluid pressure cylinder 6, and a movable clutch 5B is fixedly engaged with the fixed clutch 5A so as to be detachable. The movable clutch 5B is connected to the fixed clutch 5A. The positioning clamp during turning of the turret 4 is performed by pressing. A drive gear 7 is concentrically fixed to a turning shaft 4 a of the turret 4.

A servo motor 8 is fixed in the tool rest main body 3 in parallel with the turning shaft 4a of the turret 4, and a gear 9 having a wide tooth width is fitted on the output shaft 8a of the servo motor 8. Further, a first drive shaft 11 is supported in the tool rest body 3 so as to be rotatable and axially movable in parallel with the servomotor 8, and a second drive shaft 12 is rotated adjacent to the first drive shaft 11. Only possible are concentrically supported. A movable clutch 13B is fitted to the end of the first drive shaft 11 on the second drive shaft side, and a fixed clutch 13A that is detachably engaged with the movable clutch 13B is fitted to the second drive shaft 12. .

A gear 15 meshing with the gear 9 is fitted at the center of the first drive shaft 11, and a shift gear 16 meshing with the gear 7 is detachably fitted at the turret end. A bevel gear 17 is fitted to the rear end of the second drive shaft 12. The first drive shaft 11 is connected to a piston rod 6a of the hydraulic cylinder 6 by a shift lever 14, and the clutch 13 is moved by the hydraulic cylinder 6 in the axial direction.
A and 13B are engaged and disengaged and the gear 7 and the shift gear 16 are disengaged.

Further, a third drive shaft 20 having a bevel gear 18 meshing with the bevel gear 17 at the upper end and a gear 19 meshing with the fixed gear 10 at the lower end in the tool rest body 3.
Are supported vertically and rotatably. On the other hand, the turret 4 is provided with tool mounting stations at equal intervals on the circumference as shown in FIG. 2, and at least one of the tool mounting stations includes a rotary tool holder having a rotary tool shaft on which the rotary tool T can be mounted. When the rotary tool mounting station is indexed to a cutting position, a clutch at the front end of the rotary tool drive shaft (not shown) in the tool rest body 3 is formed at the rear end of the rotary tool shaft. The rotary tool T is rotated by a rotary tool motor (not shown) in engagement with the clutch.

Next, the operation of the turret tool post with a turning mechanism of the tool post body of the present invention will be described. When the turret 4 is to be turned and indexed, a pressurized fluid is supplied to the rear chamber (the right chamber in FIG. 1) of the hydraulic cylinder 6 to directly move the piston rod 6a.
To release the engagement of the positioning clamp clutches 6A and 5B, and simultaneously move the first drive shaft 11 to the left via the shift lever 14 to engage the shift gear 16 with the turret drive gear 7 and engage the clutches 13A and 13B. Then, the edge with the second drive shaft 12 is cut. In this state, the servomotor 8 is rotated to rotate the turret 4 via the gear trains 9, 15, 16, 7 to index the rotary tool T to the cutting position. Next, a pressurized fluid is supplied to the front chamber (the left chamber in FIG. 1) of the fluid pressure cylinder 6 to engage and press the movable clutch 5B to the fixed clutch 5A to perform the positioning clamp of the turret 4.

The first drive shaft 11 is moved via the shifter lever 14 to the right of the piston rod 6a during the positioning clamp.
Moves to the right, the shift gear 16 separates from the gear 7, the edge of the first drive shaft 11 and the turret turning shaft 4a is cut off, the movable clutch 13B engages with the fixed clutch 13A, and the tool rest is driven by the servo motor 8. The main body 3 can be turned. Next, the servo motor 8 is rotated by the tool post turning command of the NC, the tool post main body 3 is turned in a horizontal plane via the gear trains 9, 15, 17, 18, 19, and 10, and the axis of the rotary tool T is rotated by the spindle. It is positioned at an angle specified by the program with respect to the axis (Z axis). Then, with the rotation of the work held by the spindle chuck (not shown) restricted, the rotating tool T
Is rotated, and the turret tool post is fed obliquely with respect to the Z axis by synchronous control of the X and Z axes to perform oblique hole machining.

[0015]

The turret tool rest with a turning mechanism of the tool rest body of the present invention is constructed as described above, and has the following effects. According to the first aspect of the present invention, the first drive shaft rotated by the servomotor is selectively transmitted to the turret turning means and the tool post main body turning means, so that the turret is turned by a single servomotor. And the turret main body can be rotated, and a turret turret with a turning mechanism of the turret main body can be formed without becoming large and heavy. What used to be two axes with one axis can be reduced to one axis.
Significant cost reduction including equipment is possible.

According to the second aspect of the present invention, the axial movement of the first drive shaft is driven by the drive means for engaging and disengaging the turret clamp clutch. A single axial drive means is sufficient,
Further simplification and downsizing can be achieved.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing the internal structure of a turret tool post with a turning mechanism of the tool post body of the present invention.

FIG. 2 is an external view of a turret tool post with a turning mechanism of the tool post body of the present invention.

FIG. 3 is a perspective view of a lathe having a conventional turret tool post with a B-axis motor.

FIG. 4 is an explanatory view showing the internal structure of a turret tool post with a B-axis motor according to the related art.

[Explanation of symbols]

 Reference Signs List 1 saddle 2 middle base 3 turret main body 4 turret 5A, 5B turret positioning clamp clutch 6 fluid pressure cylinder 8 servo motor 7, 9, 10, 15, 16, 19 gear 11 first drive shaft 12 second drive shaft 13A , 13B Tool post body turning clutch 14 Shifter lever 17, 18 Bevel gear 20 Third drive shaft

Claims (2)

(57) [Claims] 1. A tool rest body pivotable about a vertical axis perpendicular to a longitudinal feed axis of a lathe and a cutting axis perpendicular thereto, and a turning center axis perpendicular to a turning axis of the tool rest body. In a turret tool rest having a swivelable turret, a turret turning means, a tool post body turning means, a servo motor, and an output of the servo motor are selected to one of the turret turning means and the tool post body turning means. A turret tool post with a turning mechanism for the tool post body, wherein the turret and the tool post main body are turned by a single servomotor. 2. A tool rest body pivotable about a vertical axis perpendicular to the longitudinal feed axis of the lathe and a cutting axis perpendicular thereto, and a turning center axis perpendicular to the turning axis of the tool rest body. A turret tool rest having a swivelable turret; a servomotor that alternately turns the turret and the tool post body; a first clutch that can be disengaged to perform a positioning clamp for turning the turret;
Driving means for disengaging and disengaging the clutch, a first drive shaft rotated by the servomotor and axially displaced by the driving means, and fitted to one end of the first drive shaft for simultaneous disengagement of the first clutch A disengageable shift gear that is disengaged from the turret drive gear, and is provided between the other end of the first drive shaft and the second drive shaft for turning the tool rest main body; At the same time, the second drive shaft
A second clutch that is disengageable and disengages the transmission of rotation to the drive shaft; and a tool rest body turning means for turning the tool rest body by rotation of the second drive shaft.
When the clutch is engaged, the second clutch is engaged and the shift gear is disengaged, and when the first clutch is disengaged, the second clutch is disengaged and the shift gear is engaged so that one shift gear is engaged. A turret tool post with a turning mechanism for the tool post body, wherein the turret and the tool post main body are turned by a servomotor.