JPH0655395A - Angular attachment for machining center - Google Patents

Abstract

PURPOSE:To adjust the direction of a tool accurately in a short time with an angular attachment kept mounted on a spindle head. CONSTITUTION:A power shaft 3 is provided in a casing 1 and connected to a tool rotating shaft 4 through power transmission mechanism 5. The casing 1 is formed of a fixed casing 12 locked to a spindle head, and a rotary casing 13 supporting the tool rotating shaft 4. The fixed casing 12 is provided with an upper curvic 16 elevatingly, and the upper curvic 16 is energized downward by a spring 17. The rotary casing 13 is provided with a lower curvic 18, and the whirl-stop of the rotary casing 13 is performed by the engagement between the respective curvics 16, 18. The upper curvic 16 is elevated by a hydraulic cylinder 24 through a positioning pin 15 and a lever 20. The rotary casing 13 is released from the power shaft 3 by operating mechanism 33 at the engaged time of the respective curvics 16, 18 and connected to the power shaft 3 at the engagement released time of the respective curvics 16, 18.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an angular attachment used for machining an angle head with a machining center.

[0002]

2. Description of the Related Art In a vertical machining center, an angular attachment is used for side surface processing, inner surface processing, or angle head processing such as inclined surface processing. A conventional angular attachment includes, for example, as shown in FIG. 3, a casing 41, which is mounted on a spindle head (not shown) of a machining center via a shank 42 and fixed by a positioning pin 43. Orientation spindle head positioning block 4
It is positioned at 7. Then, the rotation of the power shaft incorporated in the casing 41 is transmitted to the tool rotation shaft (both not shown) via the power transmission mechanism, and the tool 44 is rotated to perform angle head processing.

[0003]

By the way, in angle head machining, when there are a plurality of machining locations around the spindle head, it is necessary to change the orientation of the tool 44. However, according to the conventional angular attachment,
Since the orientation of the casing 41 is determined in one direction by the positioning pin 43, the attachment is removed from the spindle head, and the four bolts 46 provided on the positioning ring 45 are attached.
Was loosened, the orientation of the casing 41 was adjusted, and then the attachment was attached to the spindle head again. Therefore, the adjustment work is very troublesome, and there is a problem that the adjustment time is long particularly when high accuracy is required.

In order to solve such a problem, conventionally, a method has been adopted in which a plurality of attachments having different casing orientations are provided in an automatic tool changer, and the attachments are attached to and detached from the spindle head every time the machining location is changed. However, according to this method, it is necessary to prepare a large number of attachments, which not only leads to a high cost, but also when using a plurality of types of attachments, the number of pots may be insufficient, and moreover, the number of times of replacement is high. As the number increases, the replacement time and the positioning time become longer, which adversely affects the machining efficiency.

SUMMARY OF THE INVENTION An object of the present invention is to provide an inexpensive angular attachment for a machining center in which the orientation of the tool can be adjusted accurately in a short time while being attached to the spindle head.

[0006]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a casing mounted on a spindle head of a machining center, in which a power shaft located on an extension line of the main shaft and a tool intersecting with the power shaft. An angular attachment in which a rotary shaft and a power transmission mechanism for connecting the power shaft to the tool rotary shaft are internally provided, and a fixed casing in which the casing is prevented from rotating around the spindle head and a rotary casing in which the tool rotary shaft is internally provided. The stationary casing is provided with a locking member movable along the power shaft, and the rotating casing is provided with an engaging member that engages the locking member to prevent the rotating casing from rotating around the stationary casing. A drive mechanism is provided for driving the stop member to an operating position where it engages with the engaging member and a non-acting position where it disengages from the engaging member, and the rotary casing at the operating position of the locking member With releasing the power shaft,
An operating mechanism for connecting the rotary casing to the power shaft at the non-acting position of the locking member is provided.

[0007]

In the angular attachment of the present invention, when the locking member is placed in the non-acting position by the drive mechanism, the locking member is disengaged from the engaging member and the rotary casing becomes rotatable. The rotary casing is coupled to the power shaft by the operating mechanism. In this state,
When the spindle indexing command is output, the rotation of the power shaft causes
The rotating casing is rotated at a predetermined indexing angle, and the orientation of the tool rotating shaft is automatically adjusted. Also, when the locking member is placed in the operating position by the drive mechanism, the locking member is engaged with the engaging member to prevent the rotating casing from rotating against the fixed casing, and the operating mechanism causes the rotating casing to rotate. Is released from. Therefore, in this state, the rotary casing is stopped, the rotation of the power shaft is transmitted to the tool rotary shaft via the power transmission mechanism, and the angle head machining is performed by the tool coupled to the tool rotary shaft.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a casing, which is mounted on a spindle head (not shown) of a machining center via a shank 2. In the casing 1, a power shaft 3 located on an extension line of a main shaft (not shown) of the machining center, a tool rotating shaft 4 orthogonal to the power shaft 3, and a power transmission mechanism 5 connecting the power shaft 3 to the tool rotating shaft 4. And are decorated. The power shaft 3 is supported by the casing 1 by a pair of upper and lower bearings 6, 7, a tool 8 is coupled to the tool rotation shaft 4, and a pair of bevel gears 9, 10 is connected to the power transmission mechanism 5.
Is provided.

The casing 1 of this embodiment is composed of a fixed casing 12 and a rotating casing 13 which are vertically divided into two parts. The fixed casing 12 is fixed to a spindle head through a fixing block 14 and a positioning pin 15 to prevent the rotation casing from rotating. The tool rotating shaft 4 is internally provided in 13. Inside the fixed casing 12, an upper carbic 16 as a locking member is provided so as to be able to move up and down along the power shaft 3, and a spring 17 for urging the upper carbic 16 downward is housed. The lower casing 18 integrated with the casing 1 is provided as an engaging member for engaging the upper casing 16 in the upper end of the rotating casing 13, and the rotating casing 13 is fixed to the fixed casing 12 by the engagement of the respective casings 16. It is designed to be stopped by.

Fixed casing 12 and fixed block 14
A lever 20 having a Y-shaped open end is housed inside, and is pivotally supported by a fulcrum 21 at the intermediate part, and the end is pin 22 and the upper carbic 16
Is bound to. The positioning pin 15 is supported by the fixed block 14 so as to be retractable and retractable, and is biased in a protruding direction by a spring 23, and swings the lever 20 when retracted.
A hydraulic cylinder 24 is installed on the spindle head at a position corresponding to the positioning pin 15, and its piston rod 25 faces the positioning pin 15 from above. And lever 2
0, the positioning pin 15, the hydraulic cylinder 24, and the like constitute a drive mechanism 26, which allows the upper kerbic 1 to move.
6 is driven to an operating position where it engages with the lower curb 18 and a non-operating position where it is disengaged upward from the lower curb 18.

The hydraulic cylinder 24 has a proximity switch 27 for confirming the forward position and a proximity switch 28 for confirming the reverse position.
Is attached. The positioning pin 15 includes a cap 29 that receives the spring 23, and the cap 29 is provided with a positioning key 31 that is locked to a positioning ring 30 provided on the lower side of the shank 2. 32 is a positioning pin 1
5 is a positioning block provided on the spindle head so that 5 is fitted therein.

As shown in an enlarged view in FIG. 2, a cylinder 34 is formed on the lower carbic 18 so as to open toward the power shaft 3, and the cylinder 34 has a piston 36 having a metal 35 at its tip. And a spring 37 that urges the spring 37 toward the power shaft 3 side. Further, a vertical hole 38 is formed in a valley portion of the lower curvic 18 so as to communicate with the cylinder 35. In the vertical hole 38, a cam pin 39 that engages with the V groove 36a of the piston 36, and the cam pin 39 is moved upward. A biasing spring 40 is provided. And piston 3
6, the cam pin 39, the springs 37, 40, etc. constitute the actuating mechanism 33. When the upper carbic 16 is lowered to the working position, the cam pin 39 causes the piston 36 to retract and the metal 35 to separate from the power shaft 3. When the rotating casing 13 is released from the power shaft 3 and the upper carbic 16 is raised to the operating position, the cam pin 39 is raised by the spring 40, the piston 36 is advanced by the spring 37, and the metal 35 is moved to the power shaft 3. The rotary casing 13 is connected to the power shaft 3 by being pressed against the power shaft 3.

Next, the operation of the angular attachment configured as described above will be described. When a tool change command is output from a controller (not shown), the automatic tool changer operates to mount the angular attachment on the spindle. In this state, when the M1 command is output from the control device, the drive mechanism 26 causes the hydraulic cylinder 24 to move.
Is biased, the positioning pin 15 is pushed down by the piston rod 25, the upper carbic 16 is raised to the non-acting position via the lever 20, and the rotary casing 13 becomes rotatable. At the same time, in the operating mechanism 33, the cam pin 39 is raised by the spring 40 and the piston 36 is moved forward by the spring 37, so that the rotary casing 13 is connected to the power shaft 3. Then, the proximity switch 27 detects this state and outputs a confirmation signal to the control device.

When an indexing command for the spindle is output from the controller based on the confirmation signal (the controller can output the indexing angle command at a pitch of 5 °), it is integrated with the rotation of the power shaft 3. Then, the rotary casing 13 is rotated at a predetermined indexing angle, and the orientation of the tool rotary shaft 4 is automatically adjusted. Therefore, the orientation of the tool 8 can be adjusted accurately in a short time while the angular attachment is still attached to the spindle head. Further, by changing the indexing angle of the rotary casing 13, the tool 8 can be attached with one attachment.
Since it can be oriented in any direction, it is not necessary to store a large number of attachments in the automatic tool changer, and the processing cost can be reduced.

In this way, when the rotary casing 13 is indexed, the control device outputs the M2 signal, and in response thereto, the hydraulic cylinder 24 is deenergized, the positioning pin 15 is projected by the spring 23, and the upper carbic 16 is moved. Spring 1
It is lowered to the working position by 7 and engaged with the lower kerbic 18. As a result, the rotary casing 13 is prevented from rotating by the fixed casing 12, the piston 36 is retracted by the cam pin 39, and the rotary casing 13 is released from the power shaft 3. Then, the proximity switch 28 detects this state, outputs a confirmation signal to the control device, and the control device generates a machining start command based on the confirmation signal. As a result, in the state where the rotary casing 13 is stopped, the tool rotating shaft 4 is rotated by the main shaft via the power shaft 3 and the power transmission mechanism 5, and the angle head machining is performed by the tool 8.

In the above embodiment, the angular attachment of the type in which the tool rotation shaft 4 is orthogonal to the power shaft 3 is illustrated, but the present invention is not limited to this.
It can be applied to an attachment in which the tool rotation shaft 4 intersects with the power shaft 3 at an arbitrary angle, for example, 45 °. In addition, the shape and configuration of each part can be appropriately changed without departing from the gist of the present invention. It is also possible to materialize.

[0017]

As described above in detail, according to the present invention, the rotary casing is rotatably coupled to the power shaft, and is released from the power shaft in the state where the rotary casing is stopped around the fixed casing. Since it was configured as
With the angular attachment still attached to the spindle head, the orientation of the tool can be adjusted accurately in a short time, which improves the machining efficiency and reduces the cost.

[Brief description of drawings]

FIG. 1 is a front view of an angular attachment showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view showing an operating mechanism of the attachment of FIG.

FIG. 3 is a front view showing a conventional angular attachment.

[Explanation of symbols]

1 ... Casing 2, Shank 3, Power shaft, 4
..Tool rotating shafts, 5 ... Power transmission mechanism, 8 ... Tools, 1
2 ··· Fixed casing, 13 ··· Rotating casing, 14
..Fixed blocks, 15..Positioning pins, 16..Upper carbic, 17,23,37,40..Springs, 18
・ ・ Lower curvic, 20 ・ ・ Lever, 24 ・ ・ Hydraulic cylinder, 26 ・ ・ Drive mechanism, 27, 28 ・ ・ Proximity switch, 33 ・ ・ Operating mechanism, 36 ・ ・ Piston, 39 ・ ・ Cam pin

Claims (1)

[Claims] 1. A casing mounted on a spindle head of a machining center, a power shaft located on an extension line of the spindle, a tool rotating shaft intersecting with the power shaft, and a power transmission mechanism connecting the power shaft to the tool rotating shaft. In an angular attachment with a built-in, the casing is composed of a fixed casing that is prevented from rotating around the spindle head, and a rotating casing that has a tool rotating shaft inside, and the fixed casing has a locking member that can move along the power shaft. The rotating casing is provided with an engaging member that engages with the locking member to prevent the rotating casing from rotating with respect to the fixed casing. A drive mechanism for driving to the disengaged non-acting position is provided, and the rotating casing is released from the power shaft at the actuating position of the locking member and rotated at the non-acting position of the locking member. An angular attachment for a machining center, which is provided with an actuating mechanism that connects a rotary casing to a power shaft.