JPS62224541A - Angle head - Google Patents

Abstract

PURPOSE:To make it possible to freely turn the direction of a tool, by providing a stationary section provided with a locating pin, and a rotatable section journalling a tool chuck and being rotatably about a drive shaft relative to the stationary section. CONSTITUTION:A constraint member 27 is inserted in a constraint bushing 12 in association with the movement of a spindle head 1 or a table 30. Further, working medium such as hydraulic oil or the like is charged under pressure into a pressurizing chamber K from a pressurizing hole 22b in a locating block 22 through a communication hole 11a in a locating pin 11, a cylinder hole 13a in a stationary section 13 and a communication hole 13d. Further, a flange 23c if moved overcoming the resilient force of a fixing spring 26 to release the fixing of a rotary section 14 to the stationary section 13. Thereafter, a plurality of control shafts on the spindle head 1 and the table 30 are simultaneously moved, and therefore due to this movement of a spindle 2, the rotary section 14 is rotated about a drive shaft 4 relative to the stationary section 13 to turn the machining direction of a tool.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an angle head for connecting a tool to a spindle with the axial direction of the tool oriented in a different direction from the axial direction of the spindle.

[Conventional technology]

An angle head is known as a tool holder for a machine R tool that attaches a tool to a main spindle with the axial direction of the tool in a different direction from the axial direction of the main spindle. This angle head consists of a drive shaft that is directly connected to the main shaft and a tool chuck that is rotated by the drive shaft, which are attached to a housing with their axes facing in different directions. is locked to a positioning block fixed to the spindle head to completely fix the housing to the spindle head.

[Problem that the invention seeks to solve]

However, with the above configuration, it is not possible to index the angular position in the circumferential direction around the main axis of the tool, so if it is necessary to change the machining direction (edge direction), the angle head cannot be used with another tool. The problem is that the advantages of the angle head are lost and the number of processes cannot be reduced. For this reason, the spindle head and angle head each have control axes, and a structure has been developed in which the direction of the cutting edge can be changed using them. Both the angle head and the angle head have a problem in that their structures are complicated.

[Means for solving problems]

The present invention provides an angle head in which a drive shaft connected to a main shaft of a machine tool and a tool jack rotated by the drive shaft are attached to a housing with their axes facing in different directions. a fixed part that pivotally supports the drive shaft and is equipped with a positioning pin that locks to a positioning block provided on the spindle head of the machine tool; and a rotating part that is rotatably provided around a drive shaft, and a fixing mechanism for fixing the rotating part to the fixed part is provided between the fixed part and the rotating part. This is because the conventional problems have been solved.

[Effect]

Connect the drive shaft to the main shaft, lock the positioning pin to the positioning block, attach the angle head to the machine tool, loosen the fixing mechanism, and make the rotating part rotatable relative to the fixed part of the housing. By keeping the spindle stationary while the movement of the part is restrained by some kind of restraint means, the cutting edge of the tool attached to the tool jack is directed in the machining direction, and then the rotating part is fixed to the fixed part by the fixing mechanism. do. In this state, the spindle is operated to rotate the tool and process the workpiece.

When the machining is completed and it becomes necessary to change the machining direction, the rotating part is unfixed by the fixing mechanism, and the rotating part is rotated around the main axis in the same manner as above to process the tool. direction, fix the rotating part to the fixed part using the fixing mechanism, and start machining work.

〔Example〕

1 and 2 show one embodiment of the present invention, and in these figures l represents the spindle head of the machine tool. This spindle head I is provided with a spindle 2, and the spindle 2 has a tool (
(not shown) and the drive shaft 4 of the angle head 3 are detachably attached as is well known. The angle head 3 has the drive shaft 4 and the tool chuck 6 arranged so that their axial directions are perpendicular to each other, and their bevel gears 7 and 8 are meshed with each other so that a ball bearing 9.1 (H) rotates on the housing 5. It is provided with a positioning pin II which is freely supported and has a hollow structure with a communication hole 11a bored in the center, and a restraining bush I2.

The housing 5 includes a fixed part I3 that pivotally supports the drive shaft 4 and is provided with a positioning pin 11, and a tool jack 6.
and a rotary part I4 which is rotatably supported around the drive shaft 4 with respect to the fixed part 13.

The positioning pin 11 is tightened by screw I5 on the drive shaft 4.
A cylinder having a stop plate 17 that locks on a locking portion 16a of a positioning ring I6 fixed to the cylinder, whose axial direction is aligned parallel to the axial direction of the drive shaft 4, and which is bored in the fixed portion 13 of the housing 5. It is fluid-tightly inserted into the hole 13a and attached so that it can move freely in the axial direction.
61. - Pine 1 is biased to 1 top. Stop plate 17
When the drive shaft 4 of the angle head 3 is removed from the main shaft 2, it is moved together with the positioning pin 11 by the spring 18 and is locked to the locking part 16a of the positioning ring I6,
This is to prevent free rotation of the fixed part 13 with respect to the drive shaft 4 to prevent misalignment of the relative position between the drive key 19 and the positioning pin If. It is inserted through the hole 17a and fixed to the positioning pin 11 with a set screw 21. The spindle head 1 is fixedly provided with a positioning block 22 in which a pressurizing hole 22b is communicated with a locking hole 22a for locking the positioning pin 11 of the angle head 3.

Further, the rotating portion I4 of the housing 5 includes a cylindrical member 23 having a circular cross section and a guide shaft portion 23b and a flange 23c functioning as a piston formed at the end of the cylindrical member 23a. 23a to the shaft hole 25a of the cap 25 attached to the fixed part 13 with a plurality of bolts 24, the flange 23c to the cylinder part +3b formed on the fixed part 13, and the guide shaft part 23b to the fixed part 13. The guide holes 13c are respectively fitted into the formed guide holes 13c in a liquid-tight manner.
It is provided rotatably around the drive shaft 4 and movable in the axial direction of the drive shaft 4 .

The fixed part 13 also has a communication hole that connects the cylinder hole 13a with the pressurizing chamber of the cylinder part 13b between the fixed part 13 and the flange 23c. 3d is bored, and a flange 23c is provided between the cap 25 and the flange 23c.
A fixing spring 26 is housed in the fixing spring 26 which presses the cylinder member 23 against the fixing part 13 to fix the cylindrical member 23, that is, the rotating part 14, to the fixing part 13.

Note that the flange 23c and the fixing spring 26 constitute a fixing mechanism 29. 27 is a restraint bush! A restraining part (28) is inserted into the shaft 2 and restrains the movement of the rotating part I4, and is fixed to a table 30 of a machine tool, etc. 28 is a handle member. The operation of the angle head according to the invention will be explained.

When the angle head 3 is not in use, the spring I
8, the stop plate I7 is attached to the locking portion 1 of the positioning ring 1G.
6a to fix the drive M4 and the housing 5 integrally with each other, and the tool chuck 6 is normally stored in a tool magazine or the like with a tool (not shown) loaded therein. The rotating portion 14 is integrally fixed to the fixed portion 13 by pressing the flange 23c of the cylindrical member 23 against the inner surface of the cylinder portion 13b of the fixed portion I3 by a fixed spring 26.

When using the above angle head 3, it is taken out from a storage location such as a tool magazine using an automatic tool changer or the like in the same manner as a tool, and the drive shaft 4 is pressed against the main shaft 2 and inserted. At this time, the positioning pin II is inserted into the locking hole 22a of the positioning block 22 fixed to the spindle head 1.
After the tip is fixed to the positioning block 22, the spring 18 is compressed and moved back, and then stopped [
+7 is released from the locking portion 16a of the positioning ring I6. In this state, the main shaft 2 is operated, and the tool is rotated via the drive shaft 4, the bevel gear 7.8, and the tool chuck 6 to machine the workpiece.

When it is necessary to change the machining direction of the tool, the restraining bush 12 can be moved by moving the spindle head 1, table, etc.
At the same time, insert the restraining member 27 into the positioning block 22 from the pressurizing hole 22b to the communication hole 1 of the positioning pin II.
1a, the cylinder hole 13a of the fixed part I3, and the communication hole 13
A working fluid such as pressurized oil is pressurized into the pressurizing chamber K through d, and the flange 23c is moved against the elasticity of the fixing spring 26 to release the fixation of the rotating part 14 from the fixed part 13. Thereafter, a plurality of control axes such as the spindle head l and the table 30 are moved simultaneously again, and the spindle 2 is moved by circular interpolation around the restraining member 27. This movement of the main shaft 2 causes the rotating part 14 to rotate about the drive shaft 4 relative to the fixed part 13, thereby changing the machining direction of the tool. After this is completed, the injection of the working fluid into the machining chamber is stopped, the rotating part I4 is again fixed to the fixed part 13, and the restraint member 27 is pulled out from the restraint bush 12 to begin the machining operation.

When the machining is completed, the locking portion 16a of the positioning ring 16 is aligned with the position of the temporary stop 17, and the angle head 3 is removed from the main spindle 2 using an automatic tool changer or the like.

At this time, the positioning pin 11 is pushed and moved by the spring 18, and the stopper 7 is moved to the locking part 1 of the positioning ring 16.
6a, and the drive shaft 4 and housing 5 are fixed integrally with each other.

Although the above embodiment uses the restraining bush 12 and the restraining member 27 as the restraining means for the rotating part 14, other methods may also be used, such as providing a gear on the cylinder member 23 and It is also possible to provide a rack at an appropriate location and mesh it with the gear, and to change the direction of the tool by rotating the rotating part 14 by means of the rack by vertically moving or horizontally moving the main shaft 2. . Also,
A stopper member is provided at an appropriate part of the table of the machine tool, etc., and the reference surface provided on the rotating part 14 of the housing 5 is brought into contact with the stopper member to restrain the movement of the rotating part 14, and the movement of the rotating part 14 is restrained. The direction of the tool can be changed by moving the .

Furthermore, although the fixing mechanism in the illustrated embodiment uses a working fluid such as gas or liquid to keep the flange 23c from moving, it is also possible to employ a mechanism such as an electromagnetic clutch. Its concrete structure is one thing.

〔Effect of the invention〕

As explained above, in the angle head of the present invention, the housing pivotally supports the drive shaft and includes a fixing part equipped with a positioning pin that locks with a positioning block provided on the spindle head of the machine tool; It consists of a rotating part that supports the tool chuck and is rotatable about the drive shaft with respect to the fixed part, and between the fixed part and the rotating part, there is a rotating part on the fixed part. However, since the structure is equipped with a fixing mechanism that fixes the rotating part, the rotating part can be released from the fixing mechanism and the main shaft can be moved up and down, left and right, diagonally, and in some cases front and back. By rotating the rotating part of the angle head to a desired position, the direction of the tool can be freely changed.

Therefore, the number of steps can be reduced and machining operations can be performed efficiently and quickly without going through the complicated steps of changing the posture of the workpiece. In addition, since the spindle uses the movement function of the control axis that it originally has to change direction, the structure of the machine tool and angle head does not become complicated.

[Brief explanation of drawings]

Figure 1 shows the construction of the angle head of the present invention.
FIG. 2 is a schematic front view showing the relationship between the positioning ring and the stop plate. ■... Spindle head, 2... Main shaft, 3... Angle head, 4... Drive shaft, 5... Housing, 6... Tool chuck, II... Positioning pin, 13...・Fixed part, I4... Rotating part, 22... Positioning block,
29...Fixing mechanism.

Claims (1)

[Claims] In an angle head in which a drive shaft connected to the main shaft of a machine tool and a tool chuck rotated by the drive shaft are attached to a housing with their axes facing in different directions, the housing is connected to the drive shaft. a fixed part that supports the shaft and has a positioning pin that locks to a positioning block provided on the spindle head of the machine tool; a fixed part that supports the tool chuck and has the drive shaft centered with respect to the fixed part; and a rotating part rotatably provided at the fixed part, and a fixing mechanism for fixing the rotating part to the fixed part is provided between the fixed part and the rotating part. head.