JPH0735687Y2 - Cutting tool holding device with adjustable blade position - Google Patents

Description

TECHNICAL FIELD The present invention relates to a cutting tool holding device that is attached to a machine tool and holds a cutting tool, and particularly to a cutting tool holding device that can easily adjust the position of the cutting edge of the cutting tool. It is about.

As a cutting tool holding device capable of adjusting the position of the cutting edge, for example,
Some are described in Japanese Utility Model Laid-Open No. 63-67003. This cutting tool holding device includes (a) a holder main body attached to a machine tool, (b) a cutting tool holding body for holding the cutting tool, (c) an outer cylinder fitted inside the holder main body, and (d) An eccentric sleeve having an outer peripheral surface and an inner peripheral surface eccentric, fitted to the outer cylinder on the outer peripheral surface and holding the blade holder on the inner peripheral surface, and (e) a radial direction of the blade holder with respect to the holder body. Relative rotation prevention mechanism that allows relative movement of the holder but prevents relative rotation with the holder body, and (f) a rotation drive mechanism that rotates the eccentric sleeve.

In this blade holder, when the eccentric sleeve is rotated by the rotation drive mechanism, the position of the shaft center of the blade holder held by the eccentric sleeve is changed, and the blade tip position in the radial direction of the holder main body of the blade is adjusted. It That is, the position of the cutting edge is adjusted by the parallel movement of the tool holder with the rotation of the eccentric sleeve.

However, this blade holding device has a large number of constituent members and a complicated structure, so that there is a problem that the device becomes large and the manufacturing cost becomes high.

Further, although the blade edge position can be adjusted in the direction perpendicular to the axis of the blade holder, there is a problem that the blade position cannot be adjusted in the direction parallel to the axis of the blade holder. The position of the cutting edge of the cutting tool is preferably adjustable in all directions in a plane substantially parallel to the rake face of the cutting tool, and therefore it is desirable to be able to adjust in two directions orthogonal to each other. Was impossible.

Therefore, the present invention has a simple structure by rotating the cutting tool holder about one axis instead of moving it in parallel, and the cutting edge positions in two directions orthogonal to each other in a plane substantially parallel to the rake face of the cutting tool. The object of the present invention is to obtain a cutting tool holding device capable of easily adjusting.

Means for Solving the Problems And, the gist of the present invention is: (a) a main body member attached to a machine tool; (b) a blade holder for holding a blade;
(C) A position where the linear movement member held by the main body member so as to be movable along a straight line, and (d) the linear movement member and the blade holder are separated from the blade edge of the blade in a direction substantially parallel to the straight line. A hinge pin that is relatively rotatably connected to a rake face of the cutting tool and a rotation center line that extends substantially at right angles to the straight line, and (e) a relative rotation around the hinge pin with respect to the linear movement member of the cutting tool holder. It is configured to include a rotary position adjusting device for adjusting the moving position and (f) a linear moving position adjusting device for adjusting the linear moving position of the linear moving member parallel to the straight line with respect to the main body member.

In the cutting tool holding device having the above structure, if the linear movement position adjusting device adjusts the linear movement position parallel to the straight line of the linear movement member with respect to the main body member, the cutting tool holding device connected to the linear movement member by the hinge pin is held. The body and the cutting tool held by the cutting tool holder also move together, and the position of the cutting edge of the cutting tool in the first direction parallel to the straight line is adjusted.

Further, when the rotational position adjusting device adjusts the relative rotational position of the blade holder around the hinge pin with respect to the linear movement member, the blade held by the blade holder has an axial center of the hinge pin, that is, one rotation. It moves along an arc centered on the center line, but its one rotation center line is orthogonal to the straight line at a position separated from the cutting edge of the cutting tool in a direction substantially parallel to the straight line, so that the cutting edge of the cutting tool is It moves in the direction substantially perpendicular to the straight line, that is, in the second direction substantially perpendicular to the first direction, and the position in the second direction is adjusted.

After all, the positions of the first direction parallel to the straight line and the second direction perpendicular to the straight line can be adjusted, but since the hinge pin extends almost at right angles to the rake face of the cutting tool, it is a plane substantially parallel to the rake surface of the cutting tool. The position of the cutting edge can be adjusted in the first and second directions that are substantially orthogonal to each other.

The rake face of the cutting tool may be in a posture extending along a plane parallel to the first direction and the second direction, or may be inclined at a small angle with respect to the plane. In the former case, the one rotation center line is set so as to extend in the direction orthogonal to the rake face, but in the latter case,
It will be set slightly tilted from the posture orthogonal to the rake face. Further, when the one rotation center line is located at a position accurately separated from the cutting edge of the cutting tool in the first direction, the second direction is exactly orthogonal to the first direction, but the position where this condition is satisfied is There is only one point, and when the position adjustment in the second direction is performed by the rotation of the tool holder around the hinge pin, it is unavoidable that the second direction inclines from the direction perpendicular to the first direction by a small angle. In the utility model registration claim, "one rotation center line extending substantially at right angles to the rake face of the cutting tool and the straight line at a position separated from the cutting edge of the cutting tool in a direction substantially parallel to the straight line" and two "almost This is why "" is used.

Effect of the Invention As is clear from the above description, in the blade holder according to the present invention, movement of the blade holder relative to the main body member in a direction parallel to a straight line and rotation center of the blade holder relative to the linear member. By the rotation about the line, the position of the cutting edge can be adjusted in two directions substantially orthogonal to each other in a plane substantially parallel to the rake face of the cutting tool.

Moreover, since the blade holder is connected to the linear moving member by a hinge pin and moves in a direction parallel to the moving direction of the linear moving member when the linear moving member moves, even if the position of the cutting edge in the first direction is adjusted, The positions in the two directions do not change at all. Therefore, when it is necessary to adjust the blade edge position in both the first direction and the second direction, first adjust the position in the second direction, and then adjust the position in the first direction,
It is possible to prevent the once adjusted position in the second direction from changing due to the position adjustment in the first direction, and it is possible to easily adjust the position of the cutting edge.

Further, in order to adjust the position in both the first and second directions, the linear movement member may be linearly moved relative to the main body member, and the blade holder may be relatively rotated with respect to the linear movement member. Therefore, the structure of the entire blade holder can be simplified. In particular, the structure for adjusting the position of the cutting edge in the second direction can be simplified as compared with the case of using an eccentric sleeve as in the cutting tool holding device described in Japanese Utility Model Laid-Open No. 63-67003, The manufacturing cost can be reduced.

Embodiment Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

In FIG. 1, 10 is a holder main body of the cutting tool holding device. The holder main body is composed of a main body member 12 and a sleeve 14, and is attached to the main shaft of the machine tool at the main body member 12. One end of the main body member 12 is a small-diameter mounting portion 16, and a fitting hole 18 extending in the axial direction of the main body member 12 is formed at the end portion on the opposite side of the mounting portion 16. Also, the body member
A radial outward flange 20 is formed in a portion of the outer periphery of the outer peripheral portion 12 adjacent to the mounting portion 16 so that when the mounting portion 16 is fitted to the main shaft, it comes into contact with the end surface of the main shaft. Then, as shown in FIG. 2, by tightening the four bolts 26 from the end surface 24 of the flange 20 on the side of the fitting hole 18,
The holder body 10 is fixed to the machine tool. The body member
The outer peripheral surface of the fitting hole 18 side of 12 is formed with arcuate notches 28 for avoiding interference between the body member 12 and the tool when tightening the bolts 26. Each notch 28 extends along the axial direction of the holder body 10 to the end surface 24 of the flange 20.

The sleeve 14 is fitted into the fitting hole 18 of the main body member 12 such that the sleeve 14 cannot rotate relative to the sleeve but is movable in the axial direction. The sleeve 14 is formed with a through hole 30 extending in the axial direction and having a rectangular cross-sectional shape, and the shaft portion 34 of the blade holder 32 is inserted through the through hole 30. As shown in FIG. 3, the shaft portion 34 has a square cross section, and the length of one side of the shaft portion 2 is the shorter one of the cross sections of the through holes 30.
It is slightly shorter than the side length. Therefore, if the blade holder 32 is inserted into the through hole 30, the pair of outer surfaces of the shaft portion 34 and the pair of inner surfaces of the through hole 30 that are substantially in close contact with each other, and the other pair of outer surfaces and the pair of inner surfaces. Small gaps 42 and 44 are formed between them. As shown by the broken line in FIG. 2, a hinge pin 46 is inserted through a bush 48 at right angles to a pair of outer surfaces that are in close contact with the inner surface of the through hole 30, and both ends of the hinge pin 46 are sleeved. It is supported in a pair of radial holes 50 formed in 14. Therefore,
The hinge pin 46 prevents the blade holder 32 and the sleeve 14 from moving relative to each other in the axial direction, and the blade holder 32 has a gap 42, 44 about one rotation center line in the through hole 30, that is, around the hinge pin 46. It is possible to rotate between.

The tip of the blade holder 32 is a large-diameter head 52. head
52 has a substantially hemispherical shape as shown in FIG. 2, and a tip 58 is attached to a seat portion 56 formed on a plane 54. The tip 58 is fixed to the seat portion 56 by the bolt 60 shown in FIG. 1, the clamp member 62 is engaged with the rake face of the tip 58, and the clamp member 62 is tightened by the bolt 64 so that the tip portion 58 is firmly fixed to the seat portion 56. It is fixed. Tip 58
The rake face is attached in a posture in which the rake face is slightly inclined with respect to the plane perpendicular to the rotation center line of the blade holder 32, and a positive rake face is obtained.

A flange 66 is formed between the head portion 52 and the shaft portion 34. A portion of the flange 66 on the shaft portion 34 side has a slightly smaller diameter, and a rubber seal member 70 is fitted to the small diameter portion 68. The sealing member 70 has a lip 72 on the sleeve 14
The end face 74 is closely contacted to prevent cutting fluid, chips and the like from entering the through hole 30. The lip 72 is an end surface of the sleeve 14 even if the blade holding member 32 rotates.
It is designed to keep in close contact with 74 elastically.

An axial hole 76 is formed in the mounting portion 16 of the main body member 12, and a bolt 78 is housed therein. Axial hole
A small-diameter communication hole 82 that communicates with the fitting hole 18 is formed in the bottom portion 80 of the 76, and the shaft portion 84 of the bolt 54 is projected from the axial hole 76 into the fitting hole 18 through the communication hole 82. And the blade holder 32
Is screwed to the rear end of the shaft portion 34. Further, a compression coil spring 88 is arranged between the head 86 of the bolt 78 and the bottom 80 of the axial hole 76, and the blade holder 32 and the sleeve 14 are always drawn inside the fitting hole 18. It is urged in the direction to be opened. On the other hand, a male screw is formed on the outer peripheral surface of the protruding end portion of the sleeve 14 from the fitting hole 18, and the nut 90 is screwed into the outer screw surface so that the end surface 92 of the nut 90 contacts the end surface 94 of the main body member 12. This keeps the sleeve 14 and the shaft portion 34 of the blade holder 32 protruding from the fitting hole 18 against the biasing force of the compression coil spring 88. Therefore, if you rotate the nut 90 and change the position of the end surface 92, the sleeve
The protrusion amount of the blade holder 14 and the blade holder 32 from the body member 12 is changed, and the bolt 78, the compression coil spring 88, the nut 90 and the like adjust the tip position of the tip 58 in the axial direction of the holder body 10. It constitutes the mechanism. The sleeve 14 constitutes a linear movement member held by the main body member 12 so as to be movable along a straight line, and the adjusting mechanism adjusts the linear movement position of the linear movement member parallel to the straight line with respect to the main body member. That is, the linear movement position adjusting device is configured.

As shown in FIG. 3, an eccentric shaft 98 is attached to the holder body 10. The eccentric shaft 98 penetrates the body member 12 in the radial direction, is rotatably held in the holding hole 102 of the sleeve 14 in the large diameter portion 100, and is attached to the shaft portion 34 of the cutting tool holding body 32 in the small diameter portion 104 at the tip. Engages with an elongated hole 106 formed along the axial direction of. As shown in FIG. 1, the eccentric shaft 98 is such that the small diameter portion 104 is eccentric with respect to the large diameter portion 100, and the rotation of the eccentric shaft 98 causes the small diameter portion 104 to move to the large diameter portion 100.
Rotate around the axis of. At this time, since the long hole 106 allows the small diameter portion 104 to move only in the axial direction of the blade holder 32, the blade holder 32 is rotated by the blade holder 32 as the small diameter portion 104 rotates.
Although it can be moved in the direction of the gaps 42, 44 in the through hole 30 of 4, the blade holder 32 is connected to the sleeve 14 by the hinge pin 46, the head 52 of the blade holder 32.
Is rotated around the hinge pin 46, and the radial position of the tip 58 with respect to the holder body 10 is changed. That is, the eccentric shaft 98 and the elongated hole 106 constitute the rotating means. Incidentally, 107 is a pin for preventing axial movement of the eccentric shaft 98.

Further, a communication hole 108 that extends in the radial direction and communicates with the through hole 30 is formed in the sleeve 14, and a pin 112 having a hemispherical head 110 is provided, and the head 110 is a shaft portion of the cutting tool holding portion 32. It is inserted so that it abuts 34. On the other hand, a radial hole 114 that communicates with the communication hole 108 is formed in the body member 12, and a bolt 116 is screwed into the threaded portion because it is formed in the opening side portion. The shaft portion of the bolt 116 is fitted into the hollow shaft portion of the pin 112, and the head portion of the bolt 116 and the pin 112.
A spring 118 is provided between the spring 118 and 110. Therefore, the head 110 of the pin 112 presses the tool holding portion 32 toward the gap 44, the small diameter portion 104 of the eccentric shaft 98 and one side wall of the elongated hole 106 are always in close contact with each other, and there is no play therebetween. The rotation of the eccentric shaft 98 is accurately converted into the rotation of the blade holder 32, and the tip 58
The cutting edge of can be easily adjusted. The chip 58
When the sleeve 14 and the blade holder 32 are moved to adjust the position of the cutting edge in the axial direction, the pin 112 slides on the outer surface of the shaft portion 34 to allow the movement.

The shaft portion 34 of the blade holder 32 is also engaged with the lock screw 120 shown by the chain double-dashed line in FIG. 1 on the surface where the elongated hole 106 is formed. The lock screw 120 is screwed to the main body member 12, penetrates one side wall of the sleeve 14 and abuts against the blade holder 32, and the blade holder 32 is attached to the body member 12 via the other side wall of the sleeve 14. Press down. Therefore, the nut 90 is rotated to move the sleeve 14 and the blade holder 32 in the axial direction, or the eccentric shaft 98 moves the blade holder 32.
Is rotated around the hinge pin 46 to adjust the position of the tip of the tip 58, and then the lock screw 120 is tightened to fix the blade holder 32 and the sleeve 14 to the main body member 12. The lock screw 120 constitutes a fixing means, and this fixing means constitutes, together with the rotating means, an adjusting mechanism for adjusting the radial position of the holder body 10 of the tip 58. From a different point of view, this adjusting mechanism has a hinge pin for the blade holder 32 with respect to the sleeve 14 as a linear moving member.
It is also a rotary position adjusting device for adjusting the relative rotary position around 46.

The rotation of the sleeve 14 with respect to the body member 12 causes the key member 122 to rotate.
Are prevented by. The key member 122 is the main body member 12
Cylindrical shaft part 126 fitted in a fitting hole 124 formed in
And a key portion 128 with a rectangular cross-section formed at its tip.
And a keyway 128 in which a key portion 128 is formed in the sleeve 14.
By being fitted to 30, the axial movement of the sleeve 14 is allowed, but relative rotation is prevented. Mating hole 12
A C-ring 132 is fitted in the vicinity of the opening of 4, and the key member 122
It is prevented from slipping out of the fitting hole 124.

In this embodiment, the turning means of the cutting tool holder 32 is the eccentric cam mechanism including the eccentric shaft 98 and the elongated hole 106, but the screw member is opposed to the pin 112 and screwed to the main body member 12. In combination, the radial holes formed in the side wall of the sleeve 14 may be projected into the through hole 30 and brought into contact with the outer surface of the shaft portion 34 of the blade holder 32 on the side of the gap 44. When the screw member is rotated, the amount of protrusion into the through hole 30 changes, so that the blade holder 32 can be rotated. Also, as a fixing means,
It is also possible that another screw member is erected from the opposite side of the screw member with the shaft portion 34 interposed therebetween, and the blade holder 32 after rotation is fastened and fixed.

Besides, the present invention can be implemented in various modified and improved modes based on the knowledge of those skilled in the art.

[Brief description of drawings]

FIG. 1 is a front sectional view showing a cutting tool holding device according to an embodiment of the present invention. FIG. 2 is a side view of the above apparatus, and FIG. 3 is a sectional view taken along line III-III in FIG. 10: Holder body, 12: Body member 14: Sleeve, 32: Cutting tool holder 46: Hinge pin, 58: Tip 98: Eccentric shaft, 106: Oblong hole 120: Lock screw

Claims (1)

[Scope of utility model registration request] 1. A body member attached to a machine tool, a blade holder for holding a blade, a linear moving member held by the body member so as to be movable along a straight line, the linear moving member and the blade holder. The body and the body are relatively rotatable about a rotation center line extending substantially at a right angle to the rake face of the cutting tool and the straight line at a position separated from the cutting edge of the cutting tool in a direction substantially parallel to the straight line. A hinge pin to be connected, a rotation position adjusting device for adjusting a relative rotation position of the blade holder around the hinge pin with respect to the linear movement member, and a linear movement position of the linear movement member parallel to the straight line with respect to the main body member And a linear movement position adjusting device for adjusting the cutting edge position.