JPH0386416A - Direction changing device of angular attachment - Google Patents

Abstract

PURPOSE:To change the direction of an output shaft to an arbitrary direction with regard to a spindle by installing a positioning block which stops a stopper pin determining the output shaft direction of an angular attachment on an angle change mechanism which is installed at the edge of the headstork to rotate the spindle. CONSTITUTION:A starting signal is sent to a servo motor 17 which rotates a pinion 16 connected to a rotatable gear 11 disposed at the end of a headstork 2 from a position control means. As a result, the gear 11 rotates with regard to the axial center of a spindle 1, and a positioning block 14 disposed at the gear 11 also rotates. By this positioning, a stopper pin 8 is engaged with the groove 15 of the block 14, and the input shaft 6 of an angular attachment 5 is connected with a spindle hole 9. Next, a tool 10 is set at the output shaft 7 of the attachment 5, and the spindle 1 is rotated to process a work. It is thus possible to change the direction of the spindle arbitrarily with one angular attachment, performing locating of the positioning block with ease and accuracy.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a direction changing device for an angular attachment used to change the direction of a main shaft in, for example, a machining center, NC milling machine, NC drilling machine, etc.

[Conventional technology] For example, when machining is performed using a machining center,
Machining may be performed in a direction different from the main axis. In this case, machining is carried out by attaching an angular attachment, in which the input shaft and output shaft are provided in different directions, to the main shaft.

FIG. 5 is a sectional view showing a state in which a conventional angular attachment is attached to a main shaft. In the figure, 1 is the main spindle, 2 is a headstock containing a bearing part 3 that supports the main spindle 1 and a part of the power transmission system (not shown) to the main spindle 1;
A positioning block 4 having a groove provided in the axial direction is fixed to the end face of the tip end.

5 is an angular attachment;
Attachment 5 has a human power shaft 6 consisting of a tapered shank.
, an output shaft 7 provided perpendicular to the input shaft 6, and a stopper pin 8 for determining the direction of the output shaft 7.

While fixing the direction of the output shaft 7 by engaging the stopper pin 8 of the angular attachment 5 with the positioning block 4 of the headstock 2, drive the manual shaft 6 into the spindle hole 9 of the spindle 1, and move the angular attachment 5 to the spindle. Attach to 1.

When the main shaft 1 rotates, the rotational driving force is transmitted to the output shaft 7 via the human power shaft 6, and the tool 10 attached to the output shaft 7 performs machining in a direction perpendicular to the main shaft 1.

[Problems to be Solved by the Invention] In the conventional mounting mechanism for the angular attachment 5 configured as described above, the stopper pin 8 fixed to the angular attachment 5 is connected to the positioning block 4 fixed to the headstock 2. Since the direction of the output shaft 7 is determined by engaging with the main shaft 1, the machining direction of the output shaft 7 is limited to one direction with respect to the main shaft 1. Therefore, when machining the spindle 1 in multiple directions, mounting the stopper pin 8 in the direction of the output shaft 7 requires multiple angular attachments at different positions, which increases equipment costs and Select the desired angular attachment from among multiple angular attachments and attach it to the main shaft.
It is necessary to remove the sushi, which has the disadvantage that the work is complicated and the work time is tedious.

This invention has been made to solve these shortcomings, and aims to provide an angular attachment direction changing device that can process in any direction with respect to the main axis using one angular attachment. This is the purpose.

[Means for Solving the Problems] A direction changing device for an angular attachment according to the invention as set forth in claim 1 includes: an angle changing mechanism attached to a headstock tip portion and rotating around a main shaft; The present invention is characterized by comprising a positioning block that is fixed to the mechanism and locks a stopper pin that determines the direction of the output shaft of the angular attachment.

Further, in the invention according to claim 2, the angle conversion mechanism is
It consists of a gear provided coaxially with the main shaft, a pinion connected to the gear, and a servo motor that rotates the pinion.

Furthermore, in the invention according to claim 3, an angle setting means for setting the rotation angle of the angle conversion mechanism, a position detection sensor provided at an equal angle at the tip of the headstock and detecting a positioning block, and the angle setting means include: The apparatus further includes a position control means for stopping the rotation of the angle conversion mechanism based on the set angle signal and the position detection signal from the position detection sensor.

[Function] In this invention, by rotating the angle conversion mechanism attached to the headstock, the positioning block that locks the stopper pin that determines the output shaft direction of the angular attachment is rotated along the outer periphery of the spindle. make it move.

The position of the positioning block can be changed with a simple structure by configuring the angle conversion mechanism that rotates the positioning block with a gear provided coaxially with the main shaft, a pinion that rotates the gear, and a servo motor that rotates the pinion. I can do it.

Roughly speaking, the positioning block can be rotated to a predetermined position by operating the position control means using an output signal from the position detection sensor and the angle setting means for setting the rotation angle of the angle conversion mechanism.

[Example 1] Fig. 1 is a partially cutaway front view of one embodiment of the present invention, and in the figure, 1, 2.5 to 10 are exactly the same as the conventional example shown in Fig. 5. be. 11 is a gear rotatably provided on the end face of the tip end of the headstock 2;
is mounted coaxially with the main shaft 1 by means of a cover 12 and a bearing 13. Reference numeral 14 denotes a positioning block fixed to the end face of the gear 11, and the positioning block 14 has a groove 15 provided toward the axial direction of the main shaft 1, as shown in the side view in the direction of arrow A shown in FIG. The stopper pin 8 of the angular attachment 5 is locked in this groove 15. 16 is a pinion connected to gear 11, 17
is a servo motor that rotates a pinion 16, and the gear 11, pinion 16, and servo motor 17 constitute an angle conversion mechanism. Reference numerals 18a to 18d are position detection sensors such as optical sensors or limit switches, and the position detection sensors 18a to 18d are placed at an angle of 90 degrees to each other on the end face of the headstock 2, as shown in the bottom view of FIG. is provided to detect the position of the positioning block 14.

FIG. 4 shows a control circuit for the direction changing device constructed as described above, in which 19 is angle setting means and 20 is position control means. The angle setting means 19 includes each position detection sensor 18a.
The position control means 20 includes a start control section 23 consisting of an OR gate that sends a start signal 22 to the servo motor 17 according to the settings of the switches 21a to 21d, and switches 21a to 21d. 2
Angle selection signal from 1d and position detection sensors 18a to 18
and a stop control section 25 that receives a position detection signal from d and sends a stop signal 24 to the servo motor 17.

Next, the operation of the direction changing device configured as described above will be explained.

When machining is performed in the direction of the position detection sensor 18c,
The switch 21a of the angle setting means 19 is turned on to set the machining direction. When this switch 21a is turned on, a start signal 22 is sent from the start control section 23 of the position control means 20 to the servo motor 17. When the servo motor 17 receives the activation signal 22, it starts rotating and rotates the pinion 16. The rotation of the pinion 16 causes the gear 11 to rotate around the axis of the main shaft 1. As the gear 11 rotates, the positioning block 14 also rotates, and the positioning block 14
When it rotates to the position of the position detection sensor 18a, a position detection signal is sent from the position detection sensor 18a to the stop control section 25. The position detection signal from the position detection sensor 18a and the angle selection signal from the switch 21a are transmitted to the stop control section 25.
, the stop signal 2 is sent to the servo motor 17 via the AND gate 26a and the OR gate 27 of the stop control section 25.
4 is sent, and the servo motor 17 stops.

By stopping this servo motor 17, the positioning block 1
4 can be accurately positioned at the position of the position detection sensor 18a.

After positioning the positioning block 14 in this way, while engaging the stopper pin 8 of the angular attachment 5 with the groove 15 of the positioning block 14,
The human power shaft 6 of the angular attachment 5 is connected to the main shaft hole 9 of the main shaft 1.

The stopper pin 8 and the positioning block 14 are locked by the connection between the human power @6 and the main shaft hole 9, and the output shaft 7 of the angular attachment 5 is positioned in the direction of the position detection sensor 18c. Therefore, a desired tool 10 is set on the output shaft 7, and the main shaft 1 is rotated to perform machining.

After this machining is completed, when changing the machining direction to the direction of the position detection sensor 18d, switch 21b of the angle setting means 19
By turning on, servo motor 1 is turned on in the same way as above.
7 rotates to rotate the gear 11 and rotate the positioning block 14 to a predetermined position.

In the above embodiment, the angle conversion mechanism is the gear 11.
Although a case has been described in which the angle conversion mechanism is configured by the pinion 16 and the servo motor 17, the angle conversion mechanism may be configured by a worm wheel, a worm, and a servo motor.

Further, as the position detection sensors 18a to 18d, an encoder that is a position detector using a code disk or a code scale may be used.

Further, although the above embodiment has been described in the case where the main shaft is a supporting shaft, the same can be applied to the case where the main shaft is a horizontal shaft in the same manner as in the above embodiment.

[Effects of the Invention] As explained above, the present invention rotates the angle conversion mechanism attached to the headstock to move the positioning block that locks the stopper pin that determines the direction of the output shaft of the angular attachment to the spindle. Since it is rotated along the outer circumference, the output shaft of the angular attachment can be changed to any direction, so the direction of the main axis can be changed to any direction with one angular attachment for machining. I can do it.

Further, by configuring the angle conversion mechanism with a gear provided coaxially with the main shaft, a pinion that rotates the gear, and a servo motor that rotates the pinion, the position of the positioning block can be easily changed with a simple configuration.

Furthermore, since the rotation stop of the angle conversion mechanism is controlled by the output signal from the angle setting means and the position detection sensor,
The positioning block can be positioned with a simple operation and with high precision, and work efficiency can be improved.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view of an embodiment of the present invention, FIG. 2 is a side view taken in the direction of arrow A in FIG. 1, FIG. 3 is a bottom view of the embodiment, and FIG. The control circuit diagram of the embodiment, FIG. 5 is a sectional view showing a conventional example. 1... Main spindle, 2... Headstock, 5... Angular
Attachment, 6...Input shaft, 7...Output shaft, 8
...Stopper pin, 9...Main shaft hole, 11...Gear 14...Positioning block, 16...Pinion, 17...Servo motor, 18a-18d...Position detection sensor, 19... ...Angle setting means, 0...Position control means.

Claims (3)

[Claims] (1) An angular attachment direction changing device that has an output shaft provided in different directions relative to the input shaft and is connected to a main shaft supported by a headstock to change the direction of the main shaft, the headstock An angle conversion mechanism that is attached to the tip and rotates around the main shaft; and a positioning block that is fixed to the angle conversion mechanism and locks a stopper pin that determines the output axis direction of the angular attachment. A direction changing device for an angular attachment, which is characterized by: (2) Direction conversion of the angular attachment according to claim 1, wherein the angle conversion mechanism includes a gear provided coaxially with the main shaft, a pinion connected to the gear, and a servo motor that rotates the pinion. Device. (3) An angle setting means for setting the rotation angle of the angle conversion mechanism, a position detection sensor provided at an equal angle at the tip of the headstock and detecting a positioning block, and an angle selection signal set by the angle setting means; 3. The direction changing device for an angular attachment according to claim 1, further comprising a position control means for stopping rotation of the angle changing mechanism in response to a position detection signal from a position detection sensor.