JPS6128674Y2 - - Google Patents

Description

[Detailed description of the invention] This invention consists of a main body with a chuck part at one end to which a cutting tool with an oil hole is attached, a case that rotatably supports the main body, and a machine frame that rotatably supports the spindle. An oil hole for machining centers that sends cutting oil to the cutting tool through an oil supply pin that engages with the oil supply hole provided in the main body, and also has a rotation prevention device between the oil supply pin and the main body that is activated when the main body is removed from the spindle. This invention relates to the invention of a cutting tool mounting holder.

In a conventional cutting tool mounting holder with an oil hole having such a configuration, a stopper extending perpendicularly to the axis of the oil supply pin is provided inside the case and is integrally attached to the oil supply pin, and the stopper is engaged with a toothed ring fitted on the outer periphery of the main body. There was one that was combined to form a rotation stopper (Utility Model Publication No. 15946, 1983). However, in order to prevent the relative positions of the oil supply pin and the case from shifting, it is necessary to form a guide pin and a recess for accommodating the guide pin between the stopper of the oil supply pin and the case, resulting in a complicated structure. Furthermore, since the stopper for preventing rotation is provided integrally with the oil supply pin, an unreasonable force is applied to the stopper, and as a result, there is a risk that the oil supply pin may be damaged. Furthermore, since the anti-rotation device of the main body is provided inside the case, it is impossible to check them from the outside, and even if a malfunction occurs, it cannot be immediately detected from the outside.

This invention was made in order to solve the above problems.A cam surface is formed in the axial direction on the outer peripheral surface of the oil supply pin, a recess is formed on the outer surface of the main body, and the cam surface and the recess are formed. A lock pin that can move forward and backward is inserted between the two to form a detent device, and a spring that constantly presses the lock pin from a direction intersecting the axis of the lock pin is attached to the detent device.
The main body and case can be freely connected and disconnected via a lock pin.

Next, an embodiment of this invention will be described with reference to the drawings.A main body 1 has a tapered shank portion 2 at one end, a cylindrical portion 4 at the center, a collar portion 3 at the other end. A keyway 5 is provided in the flange portion 3. The cylindrical part 4 consists of a large diameter part 6 and a small diameter part 7, and the large diameter part 6
A recess 8 is formed in the longitudinal direction on the outer peripheral surface of the cylindrical portion 4, and a shank insertion hole 9 for a cutting tool 37 is formed in the cylindrical portion 4 to constitute a socket portion. Further, an oil hole 10 passes through the shank insertion hole 9 from the outer periphery of the small diameter portion 7. A spacer 11 is fitted into the small diameter portion 7 in contact with the end surface of the large diameter portion 6. A case 13 is relatively rotatably supported via a bearing 12 fitted in contact with the end face of the spacer 11 and a bearing 12a fitted in contact with a stopper 15 attached to the small diameter portion 7. Further, oil seals 14 are installed at two locations on the inner circumference of the case 13 to prevent leakage of cutting oil. Further, an annular oil groove 16 is provided on the inner circumferential surface of the case 13, and an oil supply pin hole 18 and an oil groove 1 are formed parallel to the main body 1 through the oil hole 17.
6 is in communication. The oil hole 10 and oil groove 16 also communicate with each other to send cutting oil to the shank insertion hole 9. A refueling pin 20 is inserted into the refueling pin hole 18 and is urged outward by a coil spring 19 built into the refueling pin hole 18 . Also, a ball 26 inside the oil supply pin 20, which is biased by a spring 25, closes the oil supply port 35, thereby forming a check valve. 2 on the end surface of the case 13 between the large diameter portion 6 and the oil supply pin 20
7, attach the block 28 to the bolt 2 as shown in FIG.
9, a spring hole 31 is bored in the block 28, which intersects and communicates with the lock pin through hole 30, and the lock pin 32 is reciprocably inserted into the lock pin hole 30, and the ball 34 of the spring hole 31 is fixed.
is pushed up by the spring 33 and constantly presses the lock pin 32 in a direction perpendicular to its axis. Further, the block is provided with a notch 39 in the longitudinal direction, which engages with a stopper 21 attached to the oil supply pin, thereby preventing the oil supply pin 20 from coming off.

The outer surface of the oil supply pin 20 has a small diameter portion 23 and a large diameter portion 22.
The stepped portion 24 forms a cam surface. Further, a cam-shaped recess 8 with which a lock pin 32 is engaged is formed on the outer surface of the main body 1. Note that a cutting tool 37 with an oil hole is installed in the shank insertion hole 9.
is inserted and fixed to the main body with screws 38.

First, the shank of the cutting tool 37 is inserted into the insertion hole 9 of the main body 1, and the main body 1, which is fixed with the screw 38, is stored in a magazine (not shown). A manipulator operated by a predetermined signal is attached to the collar portion 3.
is held, and the shank 2 is attached to a spindle (not shown). At the same time, the oil filler port 3 of the filler pin 20
5 is also inserted into the oil supply block (not shown) of the spindle head, so the tip of the oil supply pin 20 is forcibly pressed by the oil supply block (not shown), and the contact surface of the lock pin 32 with the oil supply pin 20 is brought into contact with the large diameter portion 2.
2, moves to the small diameter portion 23 side, and enters the released state. When the holder main body 1 rotates, the lock pin 3 is locked by the cam action of the recess 8 provided on the outer periphery of the main body 1.
The tip of the lock pin 2 overcomes the pressing force of the spring 33, which will be described later, and is forcibly pushed out, and the lock pin becomes the third lock pin.
As shown in the figure, it becomes possible to follow the small diameter portion 23, and the main body itself can rotate without any trouble.

The pushed out lock pin 32 is the spring 33
The lock pin 32 is pressed and fixed by the ball 34 pushed up by the machine, and does not shift toward the main body due to vibrations of the machine or vibrations caused by cutting. This prevents defective cutting and damage to the lock pin due to contact with the lock pin. There is. The cutting oil flows from an oil supply block (not shown) to the oil supply port 35, presses the ball 26, enters the oil supply pin, and flows from the oil supply pin hole 18 to the oil hole 17, the annular oil groove 16, and the oil hole 1.
0, the oil accumulates at the upper part of the shank insertion hole 9 and is supplied to the oil hole of the cutting tool 37.

While the holder main body 1 is rotating, the lock pin 32 comes off from the recess 8 of the large diameter part 6 and the small diameter part 2 of the oil supply pin 20 is removed.
It's on the 3rd side. In a machining center, the key position of the spindle is supposed to always stop at a fixed position when automatically exchanging tools, so when the rotation of the holder is stopped, the keyway position remains at the position before rotation, that is, at a fixed position. Then, the oil supply is stopped and the ball 26 is pressed against the oil filler port 35 by the spring 25 to prevent oil leakage. When a manipulator (not shown) pinches the V-groove of the collar 3 and pulls out the holder from the spindle, the oil supply pin 20, which had been pressed by the oil supply block (not shown), is released, and the spring 19 pushes the oil supply pin 20 upwards, causing the large diameter portion 2
2 comes into contact with the lock pin 32. For this reason, as shown in FIG. 2, the lock pin 32 is pushed by the large diameter portion 22 of the oil supply pin 20, slides on the ball 34, and is pushed into the recess 8 provided in the large diameter portion 6 of the main body 1. is the phase with respect to the reference line X-X connected to the holder body 1 (the center point of the cylinder and the recess 8
The line connecting the centers is always constant, and no matter how many times the oil hole holder is attached to and removed from the spindle, the oil supply pin will be inserted into the oil supply block accurately and securely, the oil supply pin will operate reliably, and the lock pin will be locked in a fixed position. or release it. Therefore, the holder can be reliably connected to the spindle and the oil supply pin to the oil supply block without any misalignment.The lock pin after the lock is released is also pressed and fixed by the spring 33 via the ball 34, so it can be easily attached to the machining center. Can be used. It has a simple structure and is easy to manufacture even if it has a phase.

This invention forms a cam surface on the outer surface of the oil supply pin as described above, and also forms a recess 8 on the outer surface of the main body.
Furthermore, a dowel pin 32 that can move forward and backward is inserted into the case between the cam surface and the recess, and a spring 33 applies constant pressure via a ball 34 to form a rotation stopper, so that the cam surface is actuated by the longitudinal movement of the oil supply pin. Therefore, the lock pin 32 is moved forward and backward.
The case 13 can be reliably fixed to or released from the holder body at a certain position. When the holder body rotates, the dowel pin 32 is fixed by a spring through a ball inside the case when released, so it does not come into contact with the holder body due to machine vibrations, tool cutting vibrations, etc. This prevents troubles such as wear and breakage of the dowel pin, allows the main body to rotate smoothly, and provides a highly accurate cutting surface. Further, since there is no need to form a guide pin and a recess for accommodating the guide pin between the oil supply pin stopper and the case, the structure is extremely simple. Further, since there is no need to provide a stopper for preventing rotation on the oil supply pin, the oil supply pin will not be damaged. Furthermore, it has excellent effects not found in conventional products, such as making it easier to discover defects from the outside.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the oil hole holder of the present invention, Fig. 2 is a view taken in the direction of the arrows in Fig. 1 showing the state in which the lock pin is locked to the main body, and Fig. 3 is a view in the released state in which the lock pin is removed from the main body. Figure 1: View from the arrow. 1...Holder body, 2...Shank part, 3...
Flange, 4...Cylindrical body, 8...Recess, 9...Shank insertion hole (chuck part), 10...Oil hole, 11
...Spacer, 13...Case, 17...Oil hole,
18...Oil supply pin hole, 19...Coil spring, 20
...Oil supply pin, 24...Step part (cam surface), 25
... Coil spring, 27 ... Oil supply case end surface, 28
...Block, 30...Through hole for lock pin, 3
1... Spring hole, 32... Knock pin, 3
3...Spring, 35...Oil filler port, 37...Tool.

Claims (1)

[Scope of utility model registration request] A main body is provided with a cylindrical part having a shank attached to the tip of the spindle at one end and an insertion hole formed at the other end into which a cutting tool with an oil hole is attached. A case in which an oil hole communicating with the shank insertion hole is formed, and an oil supply pin hole communicating with the oil hole is formed parallel to the main body, and the oil supply pin hole is biased parallel to the main body by a spring, and the spindle can be freely rotated. An oil hole for machining centers consisting of an oil supply pin that can be connected to and detached from the oil supply hole provided in the machine frame supported by the machine body, and a detent device that is provided between the main body and the oil supply pin and connects the main body and case when the main body is removed from the spindle. In the cutting tool mounting holder, a cam surface is formed in the axial direction on the outer peripheral surface of the oil supply pin, and
A cam-shaped recess is formed on the outer periphery of the cylindrical portion of the main body, and the cam surface is moved forward and backward by the cam action of the cam surface of the oil supply pin and the recess of the main body onto the case between the recess and the recess and the cam surface. A detent device is formed through which a removable lock pin is inserted, and a spring is attached to the detent device that constantly presses the lock pin from a direction intersecting the lock pin axis. A lock pin engages between the diameter parts and connects the main body and case with the lock pin. When the main body is attached to the spindle, the oil supply pin is pushed down into the oil supply hole and the lock pin separates from the large diameter part of the oil supply pin, and as the main body rotates. A cutting tool mounting holder with an oil hole, characterized in that the lock pin is forced to follow the small diameter part by the cam action of the concave part.