JP2002346808A - Cutter unit for lathe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make an edge of a blade easily exchangeable, and also enable to perform position adjustment and angle adjustment of the edge of a blade easily. SOLUTION: A cutter unit 1 for lathe, formed by a tip holder 3 and a tip lock 5 which were attached on both sides of a tip 2, is screwed to a shank 7 by an attachment screw 9. The cutter unit 1 is enabled to easily exchange the blade edge of a tip 2 by removing or loosening the attachment screw 9 to remove or loose fixation of the tip lock 5 to the chip holder 3, while to make a positional adjustment of the blade edge 21. Also, angle adjustment of the tip holder 3 and the tip lock 5 is performed by operating angle adjustment-fixation screws 78, 79, and angle adjustments of the blade edges 21, 22, 23 of the tip 2 are performed easily.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turning tool unit used in a turning machine, and more particularly to a turning tool unit suitable for inner surface machining of a workpiece.

[0002]

2. Description of the Related Art Heretofore, as is well known, there is lathe processing as a method of processing a metal material. As an example of such lathe processing, a material to be worked is attached to a chuck of a lathe machine body, the material is rotated by rotating the chuck, and the cutting edge of a cutting tool is pressed against the material in the rotating state. There is a thing which cuts a raw material.

FIGS. 38 to 40 are perspective views showing first to third examples of conventional cutting tools used for lathe processing.

In FIG. 38, a byte 511 of the first example is shown.
Then, the notch 51 formed at the tip of the shank 512
A chip 515 having a cutting edge 514 formed on 3 is attached and fixed by brazing.

[0005] Since such a conventional cutting tool 511 is used for metal working, it needs to be replaced quickly and frequently, but in the example of FIG.
Since 15 was welded, the entire shank 512 had to be replaced, which resulted in an increase in the cost of the lathe-processed product.

In response to this, as shown in FIG. 39 and FIG. 40, a device for fixing a tip to a shank by screwing has been put to practical use.

In FIG. 39, a cutting tool 521 has a triangular tip 524 attached to a notch 523 formed at the tip of a shank 522 by a screw 525. In the cutting tool 521, the tip 524 has three cutting edges 526, 527, and 528, and can be adapted to various kinds of processing. In addition, when the cutting edge is worn, the screw 525 is removed, so that only the tip 524 is replaced and the shank is replaced. 522 can be used as it is. However, with the cutting tool 521, the cutting edges 526, 527, 5
28 do not protrude so much that the cutting edges 526, 52
When 7,528 was worn, it could not be re-sharpened and used.

In FIG. 40, a cutting tool 531 is used for processing the inner surface of a material. A horizontally long chip 534 is attached to a notch 533 formed at the tip of a shank 532 by screwing with a screw 535. One end of the tip 534 is formed in a wedge shape to serve as a cutting edge 536, and an insertion hole for screwing with a screw 535 is formed on the other end.

[0009] In such a cutting tool 531, when the cutting edge is worn, the screw 535 is removed so that the tip 53 is removed.
4 can be replaced and the shank 532 can be used as it is. Further, in such a cutting tool 531, since the cutting edge 536 protrudes sideways, it is possible to re-sharpen the cutting edge 536 when the cutting edge 536 is worn. However, if the blade is used after resharpening many times, the position of the cutting edge 536 with respect to the shank 532 changes, so that it is necessary to adjust the position in the lathe machine main body, and the shank such as a counterbore is disposed outside the concave portion of the material. In the case where the cutting edge is inserted into the inside of the recess and the inner surface of the recess is machined, it is possible to resharpen and use until the cutting edge reaches the inner surface of the recess.
I couldn't use it after resharpening too many times. Also, the angle of the cutting edge with respect to the material must be adjusted on the lathe machine main body side, which reduces the work efficiency.

[0010]

As described above, in the conventional cutting tool, when the cutting edge is worn, it is possible to re-sharp the blade and use it. Changes, it is necessary to adjust the position in the lathe machine itself, and when machining the inner surface of the concave part, you can use it again after sharpening because the cutting edge reaches the inner surface of the concave part. I couldn't fix it. Also, the angle of the cutting edge with respect to the material must be adjusted on the lathe machine main body side, which reduces the work efficiency.

The present invention has been made in view of these circumstances, and an object of the present invention is to provide a bite unit that can easily replace a blade edge and easily adjust the position of the blade edge. Another object of the present invention is to provide a bite unit that can easily replace the blade edge and can easily adjust the position and angle of the blade edge.

[0012]

In order to achieve the above object, a turning tool according to claim 1 is a turning tool for holding a tip having a cutting edge or a holder holding the tip, which is used for lathing. A chip holder in which a chip accommodating groove for accommodating the chip or a holder accommodating groove for accommodating the holder is formed in a state where at least a part of the blade edge of the chip protrudes outward; and a unit attached to the chip holder. A chip lock for pressing a chip or holder inserted into the chip storage groove or holder storage groove in a direction of pressing against the chip storage groove or holder storage groove, and a shank for disposing the chip holder. It is characterized by.

According to a second aspect of the present invention, there is provided a turning tool unit for holding a chip having a cutting edge used for lathing or a holder holding the chip, wherein at least one of the cutting edges of the tip is used. A chip holder in which a chip housing groove for housing the chip or a holder housing groove for housing the holder is formed in a state where the portion is protruded outward, and a chip holder attached to the chip holder and inserted into the chip housing groove or the holder housing groove. A tip lock for pressing the set tip or holder in a direction of pressing against the tip storage groove or the holder storage groove, a shank for arranging the tip holder in a rotatable state, and the shank of the tip holder arranged for the shank. Angle that can be adjusted with respect to the axial direction of the lens and that can be fixed in the state where the angle is adjusted Characterized by comprising an adjustment means.

According to a third aspect of the present invention, there is provided a turning tool unit for holding a chip having a cutting edge or a holder holding the tip, which is used for lathing, from one surface to the other surface. And a chip housing for housing the chip in a state where at least a part of the cutting edge of the chip is projected outward at a predetermined distance from the insertion hole forming position on one surface. A chip holder in which a groove or a holder storage groove for storing the holder is formed, and an insertion hole penetrating from one surface to the other surface, and a chip inserted in the chip storage groove or the holder storage groove. Or, a tip lock that presses a holder in a direction in which the holder is pressed against the tip storage groove or the holder storage groove, and the tip having a bottom portion and a wall portion on a tip end side. Stepped portion is formed to arrange the holder,
A shank in which a screw hole is formed in the bottom of the step;
A screw for attaching the tip, the tip holder and the tip lock to the shank so as to be rotatable and fixable, by a screw part being inserted into the insertion hole of the tip lock and the tip holder and screwing into the threaded hole of the shank,
Angle adjustment means capable of adjusting the angle of the tip holder attached to the shank with respect to the axial direction of the shank, and capable of fixing the tip holder in an adjusted angle.
It is characterized by having.

According to a fourth aspect of the present invention, there is provided a turning tool unit for a lathe which presses a cutting edge onto a material attached to a lathe processing machine and cuts the material, and holds a chip or a chip on which the cutting edge is formed. And the insertion hole is formed penetrating from one surface to the other surface, and at least a part of the cutting edge of the tip is outwardly positioned at a predetermined distance from the insertion hole formation position on one surface. A chip holder in which a chip housing groove for housing the chip or a holder housing groove for housing the holder is formed in a protruding state, and an insertion hole is formed to penetrate from one surface to the other surface; A chip lock for holding down a chip or a holder inserted in a storage groove or a holder storage groove in a direction in which the chip or the holder is pressed against the chip storage groove or the holder storage groove. A step portion having a bottom portion and a wall portion on the distal end side for arranging the tip holder, and a shank having a screw hole formed in the bottom portion of the step portion; and a screw portion having the tip lock and the tip holder. By inserting into the insertion hole and screwing into the screw hole of the shank, the tip,
A mounting screw for rotatably and fixedly attaching the tip holder and the tip lock to the shank; and an angle adjustment of the tip holder attached to the shank with respect to the axial direction of the shank is possible, and the angle is adjusted and fixed. And an angle adjusting means capable of performing the adjustment.

According to a fifth aspect of the present invention, there is provided a turning unit for a lathe according to the third or fourth aspect, wherein a part of an outer peripheral surface of the tip holder is formed by an axis of an insertion hole of the tip holder. Formed on a circumferential surface centered on the heart,
The shank is formed so that a wall of a step formed on the shank slides in close contact with the circumferential surface.

According to a sixth aspect of the present invention, there is provided a turning tool unit according to the third or fourth aspect, wherein the tip holder is attached to the shank and the wall of the stepped portion. A gap is formed between the wall and the outer peripheral surface of the tip holder, and a shield made of an elastic member for closing the gap is attached to either the shank or the tip holder.

A turning tool unit according to a seventh aspect is the turning tool unit according to any one of the third to sixth aspects, wherein the angle adjusting means is formed on an outer peripheral surface of the tip holder. A projecting portion, a projecting portion receiving groove formed toward the base end side from the shank wall portion, and the projecting portion being inserted with a gap therebetween, and one and the other of the projecting portion receiving groove First and second angle adjustment fixing screw holes formed to penetrate from the inner wall on the side to one and the other outer side surface of the shank, respectively, and are screwed into the pair of angle adjustment fixing screw holes from the outside of the shank. In this case, an angle adjustment fixing screw having a tip abutting on a side surface on one side and the other side of the projection portion to fix the projection portion is provided.

The turning tool unit according to claim 8 is the turning tool unit according to any one of claims 3 to 6, wherein the angle adjusting means includes an axis of an insertion hole of the tip holder. A slit hole penetrating from one surface to the other surface of the chip holder on a circumference centered on the outside, and an outer diameter larger than the width of the slit hole, and one side of the chip holder And an insertion hole formed at the bottom of the step portion of the shank and communicating with the slit hole of the tip holder, and a screw portion having an insertion hole of the shank from the outer surface of the shank and the tip holder. And an angle adjustment fixing screw that is inserted into the slit hole, and a part of the distal end side of the screw portion projects from the slit hole and is screwed into the screw hole of the nut.

According to a ninth aspect of the present invention, there is provided the lathe cutting tool unit according to the third or fourth aspect, wherein the tip holder is provided around a center of the insertion hole in a predetermined range of an outer periphery. And an angle adjustment fixing groove is formed on one surface on a circumference centered on the axis of the insertion hole, and the shank is mounted on the tip holder in a state where the tip holder is attached. A gap is formed between the wall of the part and the outer peripheral surface of the chip holder facing the wall,
Forming an insertion hole communicating with the gap at the bottom of the step,
The angle adjusting means has a screw hole penetrating from one surface to the other surface, and an angle adjusting and fixing member having a convex portion to be inserted into the angle adjusting and fixing groove of the tip holder on the other surface. The top and the screw portion are inserted into the insertion hole of the shank from the outer surface of the shank, and further inserted into the gap between the wall portion and the tip holder, and a part of the tip portion of the screw portion protrudes from the gap. And an angle adjustment fixing screw screwed into a screw hole of the angle adjustment fixing piece.

According to a tenth aspect of the present invention, there is provided the lathe cutting tool unit according to the third or fourth aspect, wherein the tip holder is provided around a center of the insertion hole in a predetermined range of an outer periphery. And an angle-adjusting fixed flat portion formed on the circumference of one surface centered on the axis of the insertion hole, and the shank is a wall facing the outer peripheral surface of the tip holder. A storage groove is formed in the portion, an insertion hole is formed in the bottom of the storage groove, and a part of the angle adjusting means is stored in the storage groove, and a screw hole is formed penetrating from one surface to the other surface. And an angle adjustment fixed piece having a contact portion that contacts the angle adjustment fixed flat portion of the tip holder formed on the other surface, and a screw portion inserted into the shank insertion hole from the outer surface of the shank. And
Further, an angle adjustment fixing screw inserted into the storage groove, and a part of a tip end side of the screw portion is screwed into a screw hole of the angle adjustment fixing piece.

According to a eleventh aspect of the present invention, there is provided a lathe cutting tool unit according to the third or fourth aspect, wherein the tip holder is provided around a center of the insertion hole in a predetermined range of an outer periphery. Forming an angle-adjusting fixed inclined surface having an expanded shape from one surface to the other surface, and the shank forming a storage groove in a wall portion facing an outer peripheral surface of the chip holder, An insertion hole is formed at the bottom of the groove, and a part of the angle adjusting means is housed in the housing groove, a screw hole is formed penetrating from one surface to the other surface, and a side surface of the tip holder is formed. An angle adjustment fixed piece having a contact portion abutting on an angle adjustment fixed inclined surface, and a screw portion inserted from an outer surface of the shank into an insertion hole of the shank, further inserted into the storage groove, and a screw portion Tip of Some of characterized in that it comprises a and an angle adjusting fixing screw screwing into the threaded hole of the angle adjusting fixed frame.

According to a twelfth aspect of the present invention, there is provided the lathe cutting tool unit according to the third or fourth aspect, wherein the tip holder has a circumference centered on an axis of the insertion hole on an outer circumference. A shaping surface, the shank forms a storage groove in a wall portion facing an outer peripheral surface of the tip holder, an insertion hole is formed in a bottom portion of the storage groove, and the angle adjusting means is formed in a ring shape. An inclined surface whose inner periphery converges toward the bottom of the step portion of the shank about the center of the ring-shaped axis is formed, and a circumferential surface around the center of the ring-shaped axis is formed on the outer periphery, An angle adjustment fixing ring in which a wall portion is cut in the direction of the axis and a part of the wall is cut into the storage groove, and an outer circumferential surface of the wall contacts the circumferential surface of the tip holder; From one side to the other An angle adjustment fixing piece having a screw hole formed therethrough and having a contact portion formed on a side surface to be in contact with an inclined surface of the angle adjustment fixing ring, and a screw portion having the screw portion inserted from an outer surface of the shank. An angle adjustment fixing screw inserted into the hole, further inserted inside the storage groove and the angle adjustment fixing ring, and a part of a tip end side of the screw portion is screwed into a screw hole of the angle adjustment fixing piece. It is characterized by. A turning tool unit according to claim 13 is the turning tool unit according to any one of claims 2 to 12, wherein the tip lock is inserted into the tip storage groove or the holder storage groove. Alternatively, the holder is pressed in a direction in which the holder is pressed against the chip storage groove or the holder storage groove, and the inner chip lock is connected to the chip holder and rotates together with the chip holder, and the inner chip lock is pressed from the opposite side of the chip or the holder. And an outer tip lock connected to the shank to maintain the same angle as the shank.

According to the first aspect of the present invention, the cutting edge can be easily replaced and the position of the cutting edge can be adjusted by releasing or loosening the fixing of the tip lock to the tip holder.

According to the configuration of the second to thirteenth aspects, by removing or loosening the tip lock from the tip holder, the cutting edge can be easily replaced, the position of the cutting edge can be adjusted, and the operation of the angle adjusting means can be performed. Thereby, the angle of the blade edge can be easily adjusted.

[0026]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show a first embodiment of a turning tool unit according to the present invention. FIG. 1 is an exploded perspective view, FIG. 2 is an assembled perspective view, FIG. 3 is a sectional view, and FIG. It is a side view.

Referring to FIG. 1, a turning unit 1 for a lathe
Is obtained by attaching the tip holder 3 and the tip lock 5 attached with the tip 2 therebetween to the shank 7 with the attachment screw 9. The cutting edges 21, 22, 23 of the tip 2 are attached to the material attached to the lathe machine. The pressing material is cut.

The turning tool unit 1 is formed in a rod shape, and penetrates the chip 2 on which the cutting edges 21, 22, 23 are formed, from one surface (upper surface in the drawing) to the other surface (lower surface in the drawing). While the insertion hole 31 is formed, and at least a part of the cutting edges 21, 22, and 23 of the tip 2 is projected outward at a position separated from the insertion hole 31 formation position on one surface by a predetermined distance. A chip holder 3 in which a chip housing groove 32 for housing the chip 2 is formed, an insertion hole 51 penetrating from one surface to the other surface, and a chip 2 inserted in the chip housing groove 32.
And a chip lock 5 which is pressed in the direction of pressing against the chip storage groove 32, and is formed in a rod shape.
A step 71 for forming the tip holder 3 is formed, the step shank 7 having a screw hole 74 formed in the bottom 72 of the step 71, and the screw 91 is formed by the tip lock. The tip 2, the tip holder 3 and the tip lock 5 are rotatably and fixedly attached to the shank 7 by being inserted into the insertion hole 31 of the tip 5 and the tip holder 3 and screwed into the screw hole 74 of the shank 7. It is composed of a screw 9 and an angle adjusting means capable of adjusting the angle of the tip holder 3 attached to the shank 7 with respect to the axial direction of the shank 7 and capable of fixing the tip holder 3 while adjusting the angle. .

The angle adjusting means is formed from a projection 33 formed on the outer peripheral surface of the tip holder 3 and from the wall 73 of the shank 7 to the base end side, so that the projection 33 has a gap. Protrusion receiving groove 75 inserted in a state of being inserted, and first and second through holes formed from the inner wall on one side and the other side of the protrusion storing groove 75 to one and the other outer side surface of the shank 7 respectively. Angle adjustment fixing screw hole 7
6, 77 and the first and second angle adjustment fixing screw holes 7.
6 and 77 are screwed from the outside of the shank 7, and the tip ends abut against one side and the other side of the projection 33, respectively, and the angle adjustment fixing screws 78 and 79 are used to fix the projection 33. It is configured.

The shank 7 is formed in the shape of a bar having a quadrangular cross section. A step 71 is provided at the front end of one surface, and the base end is attached to a chuck of a lathe machine main body. The shank 7 has a screw hole 74 penetrating from the bottom 72 of the step portion 71 to the other surface. Bottom 7
A circular recess 80 is formed around the second screw hole 74. A convex portion 37 (see FIG. 3) provided on the other surface of the chip holder 3 described later is inserted into the concave portion 80.

Insertions 34 and 52 are formed in the projection 33 and the tip lock 5 of the tip holder 3, respectively. The pins 6 are inserted into the insertion holes 34 and 52 so that the tip holder 3 and the tip lock 5 are inserted. The angle around the axis of the mounting screw 9 with the lock 5 is fixed.

The surfaces 35 and 36 provided on one side and the other side of the protrusion 33 of the chip holder 3 are a part of the outer peripheral surface of the chip holder 3, and the insertion of the chip holder 3 is performed. The hole 31 is formed to have a circumferential surface centered on the axis. Step 71 formed on the shank 7
The wall 73 is formed of one and the other side surfaces 81 and 82 of the protrusion accommodating groove 75. The surfaces 81 and 82 are the surface 3
It is formed with a circumferential surface so that it slides closely to 5, 36.

A circular recess 53 is formed around the insertion hole 51 on one surface of the chip lock 5. The screw head 92 of the mounting screw 9 is inserted into the recess 53.

In the middle part of the other surface of the tip lock 5,
An escape groove 54 is formed, and a tip side of the escape groove 54 is a tip pressure contact portion 55 that presses against the chip 2.

As shown in FIG. 2, in a state where the turning tool unit 1 is assembled, the tip holder 3 and the tip lock 5 are attached to the shank 7 by the attaching screws 9 with the tip 2 being interposed therebetween. Mounting screw 9 and pin 6
Accordingly, the space between the tip holder 3 and the tip lock 5 is fixed.

As shown in FIG. 3, the tip 2 has a pentagonal cross section, and the surface 24 on the upper chip lock 5 side.
Are formed in a plane, and have four inclined surfaces 25, 26, 27, and 28 forming four sides of a pentagon on the chip holder 3 side. The inclined surfaces 26 and 27 are arranged in a V shape,
The inclined surfaces 25 and 28 have a surface 24 as compared with the inclined surfaces 26 and 27.
Is formed so as to increase the angle with respect to. Face 2
4 and the inclined surface 25 intersect with each other to form the cutting edge 22, and the surface 2
4 and the inclined surface 28 intersect to form a cutting edge 23. The chip storage groove 32 of the chip holder 3 is formed in a shape that is in close contact with the inclined surfaces 26, 27, 28 of the chip 2.

The chip pressure contact portion 55 of the chip lock 5 is pressed against the intermediate portion of the surface 24 of the chip 2 to press and fix the chip 2 in the chip storage groove 32. A clearance is formed by the clearance groove 54 on the side of the cutting edge 23 of the surface 24 of the chip 2. By providing the escape groove 54, even when the surface 24 of the chip 2 is formed lower than the chip housing groove 32, the chip pressing portion 55 can press the surface 24 of the chip 2 with a sufficient force. .

The screw head 92 of the mounting screw 9 is
The surface on one side is formed in a conical shape, and the recess 5 of the tip lock 5 is formed.
Since the screw head 3 is also formed in a mortar shape, the screw head 92 can be locked in the concave portion 53 of the tip lock 5 without rattling. Insert holes 34 and 5 for tip holder 3 and tip lock 5
The inner diameter of the pin 2 is formed slightly smaller than the diameter of the pin 6 before being inserted, and a suitable frictional force is generated between the pin 6 and the insertion hole 34, 52 so that the insertion hole 34, 52 is formed. To prevent the pin 6 from coming off.

A circular convex portion 37 is formed around the insertion hole 31 on the other surface of the chip holder 3. The convex portion 37 is inserted into the concave portion 80 of the shank 7. The convex portion 37 is formed to be approximately the same size as the concave portion 80, and can be rotated in a state of being in close contact with the concave portion 80. With this structure, rattling between the shank 7 and the tip holder 3 is eliminated.

As shown in FIG. 4, the cutting edge 22 of the tip 2 protrudes from the tip surfaces of the tip holder 3, the tip lock 5 and the shank 7. An inclined surface 56 is formed between the distal end surface of the tip holder 3 and one surface, and an inclined surface 84 is formed between the distal end surface of the shank 7 and the other surface. According to 84, the usable range of the cutting edge 22 of the insert 2 in lathe processing is widened. Angle adjustment fixing screw 7 screwed into angle adjustment fixing screw hole 76
A hexagonal hole 85 into which a hexagonal wrench is inserted is formed in the end face on the base end side of 8. The angle adjustment fixing screw 78 can adjust the position of the tip by inserting a hexagonal wrench into the hexagonal hole 85 and rotating. The angle adjustment fixing screw 79 shown in FIG. 1 has the same structure as the angle adjustment fixing screw 78.

5 and 6 are explanatory views showing the angle adjustment of the turning bit unit. FIG. 5 (a) is a plan view showing a state where the chip 2 is fixed at an intermediate position, and FIG. 5 (b) is a plan view. FIG. 6A shows a state in which the tip lock 5 is removed from the state of FIG. 5A, FIG. 6A is a plan view showing a state in which the tip 2 is fixed at an inclined position, and FIG. 3) shows a state in which the chip lock 5 is removed from the state of FIG.

As shown in FIGS. 5A and 5B, when the chip 2 is fixed at the intermediate position, the mounting screw 9 is slightly loosened, and the angle adjusting fixing screws 78, 79 using a hexagon wrench. And the angle of the tip holder 3 and the tip lock 5 is adjusted so that the longitudinal direction of the shank 7 and the longitudinal direction of the tip 2 are perpendicular to each other. In this state, the positions of the angle adjustment fixing screws 78 and 79 are adjusted using a hexagon wrench. Then, the tip of the angle adjustment fixing screws 78, 79 is brought into contact with the projection 33. As a result, the protrusion storage groove 7 of the shank 7
The position of the protrusion 33 at 5 is fixed. After this,
The mounting screw 9 is strongly tightened, and the tip 2, the tip holder 3 and the tip lock 5 are firmly fixed to the shank 7. In this state, the tip holder 3 and the tip lock 5
In this state, the side surfaces of the shank 7 are aligned, and the tip ends of the angle adjustment fixing screws 78 and 79 project from the protrusion housing groove 75 with the same length.

From this state, FIGS. 6 (a) and 6 (b)
When the tip 2 is fixed in a state in which the tip of the tip 2 is inclined to the base end side of the shank 7 as shown in FIG. 7, the mounting screw 9 is slightly loosened, and in this state, the angle adjustment fixing screw 78 is rotated counterclockwise to fix the angle adjustment. The screw 78 is separated from the projection 33, and the angle between the tip holder 3 and the tip lock 5 is adjusted so that the tip side of the tip 2 is inclined to the base end side of the longitudinal shank 7,
In this state, the positions of the angle adjustment fixing screws 78, 79 are adjusted using a hexagon wrench, and the angle adjustment fixing screws 78, 79 are adjusted.
The tip of the projection 9 is brought into contact with the projection 33 to fix the position of the projection 33 in the projection storage groove 75 of the shank 7. Thereafter, the mounting screw 9 is strongly tightened, and the tip 2, the tip holder 3 and the tip lock 5 are firmly fixed to the shank 7. In this state, the side surfaces of the tip holder 3 and the tip lock 5 are inclined with respect to the side surface of the shank 7, and the tip end of the angle adjusting fixing screw 78 is
As shown in FIG. 5B, the tip of the angle adjustment fixing screw 79 is shorter than that of FIG.
As compared with the state of (b), the state is protruded longer from the protrusion storage groove 75.

Further, the tip holder 3 and the tip lock 5
When adjusting the position of the tip (the cutting edge 21 in FIG. 1) of the tip 2 with respect to the tip 2, the mounting screw 9 is slightly loosened, and the tip 2 is slidable with respect to the tip holder 3 and the tip lock 5. The position is adjusted by sliding, and the mounting screw 9 is loosened strongly. Thereby, the position of the tip of the tip 2 with respect to the tip holder 3 and the tip lock 5 can be fixed at a desired position.

According to the first embodiment, the cutting edge of the tip 2 can be easily exchanged by removing or loosening the tip lock 5 with respect to the tip holder 3 by removing or loosening the mounting screw 9. At the same time, the position of the cutting edge 21 can be adjusted, and the angle adjustment of the cutting edges 21, 22, 23 of the tip 2 can be easily performed by operating the angle adjustment fixing screws 78, 79. Thus, if the cutting edge 21 of the tip 2 is used by resharpening it many times, the tip 2 is shortened. However, by removing or loosening the mounting screws 9 and adjusting the position of the cutting edge 21, the tip 2 is suitable for use. Since the position of the cutting edge 21 with respect to the shank 7 can be kept constant until the length becomes unsuitable, there is no need to replace parts, and when the tip 2 becomes unsuitable for use, the tip 2 Since only the shank 12 needs to be replaced, the shank 12 can be reused, and the cost required for lathe processing can be reduced. Further, since the angle of the cutting edges 21, 22, and 23 with respect to the material can be adjusted on the lathe cutting tool unit 1, the work efficiency can be improved.

FIG. 7 shows a first example of the turning tool unit of FIG.
It is a perspective view of the assembled state which shows the modification of embodiment.

Referring to FIG. 7, a turning bit unit 551 of this modification is configured to hold a holder 572 holding a tip 574 having a cutting edge used for lathing.

The holder 572 has a triangular tip 574 attached to a notch 573 formed at the tip by screwing with a screw 575. Tip 574 has three cutting edges 576, 577, 578.

The tip holder 553 is provided with the tip 574.
A holder accommodating groove 582 for accommodating the holder 572 with at least a part of the cutting edge 576 protruding outward is formed.

The tip lock 555 is used to move the holder 572 inserted into the holder storage groove 582 into the holder storage groove 582.
A chip pressure contact portion 585 for pressing in a direction in which the pressure contact is performed is formed.

Other shapes of the tip holder 553 and the tip lock 555 are the same as those of the tip holder 3 and the tip lock 5 shown in FIGS. 1 to 6, and the remaining pins 6, shank 7 and mounting screws 9 are also provided. This is the same as that shown in FIGS.

According to such a modification, the present invention can be applied to the lathe cutting tool unit 551 holding the holder 572 holding the chip 574.

8 to 10 show a second embodiment of a turning tool unit according to the present invention. FIG. 8 is an exploded perspective view, FIG. 9 is an assembled perspective view, and FIG. 10 is a side view. is there. 8 to 10, the same components as those in the embodiment shown in FIGS. 1 to 6 are denoted by the same reference numerals, and description thereof is omitted.

In FIG. 8, a turning tool unit 101 is shown.
Is formed with a chip 2, a chip holder 103, a chip lock 5, a step 171 having a bottom portion 172 and a wall portion 173 on the distal end side, and on which the chip holder 103 is arranged,
The shank 107 having the screw hole 74 formed in the bottom portion 172 of the step portion 171, the mounting screw 9, and the shank 1
07 of the tip holder 103 arranged at
Angle adjustment means capable of adjusting the angle with respect to the axial direction of 07, and being able to be fixed in an angle-adjusted state;
It is composed of

The angle adjusting means according to the embodiment of the present invention comprises: a protrusion 33 formed on the outer peripheral surface of the tip holder 103;
A projection storage groove 175 that is formed from the wall 73 of the shank 107 toward the base end side and that is inserted with the projection 33 provided with a gap; and one and other sides of the projection storage groove 175 And first and second angle adjustment fixing screw holes 76, 77 formed to penetrate from the inner wall of the shank 107 to one and the other outer side surface of the shank 107, respectively. And angle adjustment fixing screws 78 and 79 screwed into the screw 77.

The angle of the mounting screw 9 between the tip holder 103 and the tip lock 5 about the axis is fixed by the pin 6.

The shank 107 is mounted on the wall 17 of the step 171 with the tip holder 103 attached.
3 and a gap is formed between the surface of the chip holder 103 facing the wall portion 173. Shields 141 and 142 made of an elastic member for closing a gap between the shank 107 and the wall 173 are attached to the tip holder 103.

To explain in more detail, the shank 107
Is formed in a bar shape having a quadrangular cross section, a step portion 171 is provided on the front end side of one surface, and the base end side is attached to a chuck of a lathe machine main body. Shank 107
Are screw holes 74 and recesses 80 in the bottom 172 of the step 171.
Are formed. The recess 80 has a tip holder 103
The projection provided on the other surface (see the projection 37 in FIG. 3) is inserted.

The surfaces 135 and 136 provided on one side and the other side of the protrusion 33 of the chip holder 103 are a part of the outer peripheral surface of the chip holder 103, and are used for mounting the shields 141 and 142. Groove 143, 1
44 are formed, and the relief grooves 145
146 are formed. The inclined surfaces 143 and 144 that are inclined inward toward the base end are formed near the surfaces 135 and 136 on the one and other side surfaces of the chip holder 103.

The step 171 formed on the shank 107
The wall portion 173 has one and the other side surfaces 181 and 182 of the protrusion storage groove 175. Faces 181, 18
2 forms a gap between the lathe cutting tool unit 101 and the surfaces 135 and 136 in the assembled state.

As shown in FIG. 9, when the turning tool unit 1 for lathe is assembled, the tip holder 103 and the tip lock 5 are attached to the shank 107 by the attachment screws 9 with the tip 2 sandwiched therebetween. Mounting screw 9
And the pin 6, the tip holder 103 and the tip lock 5
Is in a fixed state.

As shown in FIG. 10, the cutting edge 22 of the tip 2
Project from the tip surfaces of the tip holder 103, tip lock 5 and shank 107. The shank 107
Surface 181 of wall portion 173 and surface 13 of chip holder 103
The gap 183 of No. 5 is closed by the shield 141.

FIGS. 11 and 12 are explanatory views showing the angle adjustment of the turning bit unit. FIG. 11 (a) is a plan view showing a state where the chip 2 is fixed at an intermediate position.
11B shows a state in which the chip lock 5 is removed from the state of FIG. 11A, and FIG. 12 shows a state in which the chip 2 is fixed at a tilted position with the chip lock 5 removed.

As shown in FIGS. 11 (a) and 11 (b), when the chip 2 is fixed at the intermediate position, the mounting screw 9 is slightly loosened, and the angle adjusting fixing screws 78 and 79 are loosened. The angle between the tip holder 103 and the tip lock 5 is adjusted so that the direction is orthogonal to the longitudinal direction of the tip 2. In this state, the angle adjustment fixing screws 78 and 7 are adjusted.
The position of the protrusion 9 is adjusted, and the position of the protrusion 33 in the protrusion storage groove 75 is fixed. Thereafter, the mounting screw 9 is strongly tightened, and the chip 2, the chip holder 103 and the chip lock 5 are firmly fixed to the shank 107.

In this state, the shields 141 and 142
Each of the chip holders 103 has a mounting groove 1
43 and 144, and the opposite sides of the tip holder 103 are pressed against the surfaces 181 and 182 of the shank 107, respectively. Thereby, the surface 1 of the shank 107
Gap 183 between 81 and surface 135 of tip holder 103
The inside and the outside are separated by a shield 141, and the gap 184 between the surface 182 of the shank 107 and the surface 136 of the tip holder 103 is separated from the inside and the outside by the shield 142.
It is possible to prevent the shavings of metal or the like generated when using 1 for lathe processing from entering the protrusion accommodating groove 75. in this case,
The gap 183 and the gap 184 have the same interval, and the shield 141 and the shield 142 have the same length.

When fixing the tip 2 in such a state that the tip of the tip 2 is inclined to the base end side of the shank 107 as shown in FIG. 12, the mounting screw 9 is slightly loosened and the angle adjustment fixing screw is Rotate the screw 78 counterclockwise to separate the angle adjustment fixing screw 78 from the protrusion 33, and make the tip side of the tip 2 tilt to the base end side of the longitudinal shank 107 and the tip shown in FIG. Lock 5
Angle adjustment, and in this state, the angle adjustment fixing screws 78,
The position of 79 is adjusted to fix the position of the protrusion 33 in the protrusion storage groove 175 of the shank 107. Thereafter, the mounting screw 9 is strongly tightened, and the chip 2, the chip holder 103 and the chip lock 5 are firmly fixed to the shank 107. In this state, the gap 183 is as shown in FIG.
Although it is wider than the state shown in (a), the shield 141 is extended by the elastic force and pressed against the surface 181 of the shank 107. On the other hand, the gap 184 is narrower than the state shown in FIG.
2 is pressed. As a result, the gaps 183 and 184 are in a state where the inside and the outside are separated by the shields 141 and 142. As a result, the tip of the tip 2 is
Also in the case where the turning tool is fixed in a state inclined to the base end side of 07, it is possible to prevent shavings of metal or the like generated when the turning tool unit 101 is used for lathe processing from entering the protrusion accommodating groove 75.

To fix the tip 2 so that the tip of the tip 2 is inclined toward the tip of the shank 107, the angle adjustment fixing screws 78,
The operation in the direction opposite to the case of fixing the tip 79 and the tip holder 103 in a state inclined to the base end side of the shank 107 may be performed.

According to such an embodiment of the invention, the same effects as those of the embodiment shown in FIGS. 1 to 6 can be obtained, and the surfaces 135 and 136 of the tip holder 103 and the surfaces 181 and 181 of the shank 107 can be obtained. The 182 does not require as high accuracy as the surfaces 35, 36, 81, and 82 shown in FIGS. 1 to 6 and is easy to process, so that there is also an effect that the manufacturing cost can be reduced.

13 to 18 show a third embodiment of a turning tool unit according to the present invention. FIG. 13 is an exploded perspective view, FIG. 14 is an assembled perspective view, FIG. 16 is a side view, FIG. 17 is a bottom view, and FIG. 18 is a bottom view of the tip lock as viewed from the back side. 13 to 18, the same components as those in the embodiment shown in FIGS. 1 to 6 are denoted by the same reference numerals, and description thereof is omitted.

In FIG. 13, a turning tool unit 2 for a lathe
No. 01 has a chip 2, a chip holder 203, a chip lock 205, a bottom 272 and a wall 273 on the distal end side, and a step 271 for arranging the chip holder 203 is formed. A screw hole 74 is provided in the bottom 272.
The tip 2, the tip holder 203 and the tip lock 205 are connected to the shank 2
07, the angle of the tip holder 203 attached to the shank 207 to be rotatable and fixable, and the angle of the shank 207 with respect to the axial direction of the shank 207 can be adjusted, and the angle can be adjusted and fixed. Angle adjusting means.

The angle adjusting means of the turning bit unit 201 is formed by penetrating from one surface to the other surface of the tip holder 203 on a circumference centered on the axis of the insertion hole 31 of the tip holder 203. Slit hole 23
3, the outer diameter is larger than the width of the slit hole 233,
A nut 241 arranged on one surface side of the tip holder 203; an insertion hole 275 formed in the bottom 272 of the step portion 271 of the shank 207 and communicating with the slit hole 233 of the tip holder 203;
From the outside surface of the shank 207
7 and the slit hole 2 of the tip holder 203
33 and an angle adjustment fixing screw 281 that projects partly from the slit hole 233 and is screwed into the screw hole 242 of the nut 241.

The shank 207 is formed in the shape of a bar having a quadrangular cross section. A step 271 is provided on one end of the shank 207, and the base end of the shank 207 is attached to a chuck of a lathe machine main body. The shank 207 has a screw hole 7 in the bottom 272.
4 and a concave portion 80 are formed. The concave portion 80 has a convex portion 3 provided on the other surface of the chip holder 203 described later.
7 (see FIG. 15).

An insertion hole 234 is formed at an intermediate position between the insertion hole 31 and the slit hole 233 of the chip holder 203, and the insertion hole 252 is formed in the chip lock 205, respectively.
Are formed in the holes 234 and 252.
Is inserted, the angle around the axis of the mounting screw 9 between the tip holder 203 and the tip lock 205 is fixed.

The surface 235 of the chip holder 203 facing the wall 273 is a part of the outer peripheral surface of the chip holder 203, and is a circle centered on the axis of the insertion hole 31 of the chip holder 203. It is formed on the peripheral surface. The wall 273 of the shank 207 and the tip holder 2
The surface 235 of 03 is formed so as to slide closely.

As shown in FIG. 14, in a state where the turning tool unit 201 is assembled, the tip holder 203 and the tip lock 205 are attached to the shank 207 with the attachment screws 9 with the tip 2 sandwiched therebetween. The tip holder 203 and the tip lock 205 are fixed by the mounting screw 9 and the pin 6.

As shown in FIG. 15, the tip holder 203
The inner diameters of the insertion holes 234 and 252 of the tip lock 205 are slightly smaller than the diameters of the pins 6 before insertion, and an appropriate frictional force is applied between the insertion holes 234 and 252 and the pins 6. The pin 6 is prevented from coming out from the insertion holes 234 and 252 by causing the insertion.

A circular projection 37 is formed around the insertion hole 31 on the other surface of the chip holder 203. The convex portion 37 is inserted into the concave portion 80 of the shank 207.

The nut 24 into which the screw portion 282 of the angle adjustment fixing screw 281 is screwed is provided on the back surface of the tip lock 205.
1 is formed with a nut insertion groove 256.
The screw head 283 of the angle adjustment fixed screw 281 is a screw part 2
The surface on the 82 side is formed in a conical shape, and the concave portion 276 formed on the other end side of the insertion hole 275 of the shank 207 is also formed in a mortar shape, so that the screw head 283 is rattled in the concave portion 276 of the shank 207. It can be locked without it.

As shown in FIG. 16, the cutting edge 22 of the tip 2
Project from the tip surfaces of the tip holder 203, tip lock 205 and shank 207. The shank 2
07 and the surface 235 of the tip holder 203
Close. Escape groove 54 on the lower surface of chip lock 205
The more proximal end is in close contact with the shank 207 and one surface of the tip holder 203.

As shown in FIG. 17, on the other surface (back surface) of the shank 207, a screw hole 74 and a concave portion 276 are formed side by side from the tip side.

As shown in FIG. 18, the chip lock 205
A relief groove 54, an insertion hole 252, and a nut insertion groove 256 are formed side by side from the front end side on the other surface (back surface). An insertion hole 51 is formed at the center of the escape groove 54. The nut insertion groove 256 is formed on a circumference centered on the axis of the insertion hole 51.

FIGS. 19 and 20 are explanatory views showing the angle adjustment of the turning bit unit. FIG. 19A is a plan view showing a state where the chip 2 is fixed at the intermediate position.
19B shows a state in which the chip lock 205 is removed from the state of FIG. 19A, FIG. 20A is a plan view showing a state in which the chip 2 is fixed at an inclined position, and FIG. FIG.
The state where the chip lock 205 is removed from the state of 0 (a) is shown.

As shown in FIGS. 19A and 19B, when fixing the chip 2 at the intermediate position, the mounting screw 9 is slightly loosened, and the angle adjusting fixing screw 281 is slightly loosened with respect to the nut 241. , The tip holder 20 so that the longitudinal direction of the shank 207 and the longitudinal direction of the tip 2 are orthogonal to each other.
3 and the angle of the tip lock 205 are adjusted. In this state, the mounting screw 9 and the angle adjustment fixing screw 281 are strongly tightened, and the edge of the slit hole 233 of the tip holder 203 is strongly locked by the nut 241. Thus, the tip 2, the tip holder 203 and the tip lock 205 are firmly fixed to the shank 207. In this state, the tip holder 203, tip lock 205 and shank 207
Are aligned.

When fixing the tip 2 in such a state that the tip of the tip 2 is inclined toward the base end of the shank 207, the mounting screw 9 is slightly loosened and the angle adjusting fixing screw 281 is slightly loosened with respect to the nut 241. , Shank 20
7 so that the tip holder 203 can slide with respect to
As shown in FIGS. 20A and 20B, the angle between the tip holder 203 and the tip lock 205 is adjusted so that the tip side of the tip 2 is inclined toward the base end side of the longitudinal shank 207.
In this state, the mounting screw 9 and the angle adjustment fixing screw 281 are strongly tightened in this state, and the chip 2, the chip holder 203 and the chip lock 205 are firmly fixed to the shank 207. In this state, the side surfaces of the tip holder 203 and the tip lock 205 are inclined with respect to the side surface of the shank 207, and the slit hole 233, the tip lock 205, and the nut insertion groove 256 of the tip holder 203 rotate counterclockwise, and the angle The adjustment fixing screw 281 is arranged on the tip 2 side of the slit hole 233, and the nut 241 is arranged on the tip 2 end side of the nut insertion groove 256.

When adjusting the position of the tip (tip 21 in FIG. 1) of the tip 2 with respect to the tip holder 203 and the tip lock 205, the mounting screw 9 is slightly loosened.
The chip 2 is made slidable with respect to the chip holder 203 and the chip lock 205, the position is adjusted by sliding the chip 2, and the mounting screw 9 and the angle adjustment fixing screw 281 are loosened strongly. Thereby, the position of the tip of the tip 2 with respect to the tip holder 203 and the tip lock 205 can be fixed at a desired position.

According to such a third embodiment, the mounting screw 9 and the angle adjusting fixing screw 281 are removed or loosened and the chip lock 20 for the chip holder 203 is removed.
By removing the fixing of 5, the cutting edge of the tip 2 can be easily replaced, the position of the cutting edge 21 can be adjusted, and the angle adjustment of the cutting edges 21, 22, 23 of the chip 2 can be easily performed. This has the same effects as those of the embodiment shown in FIGS. 1 to 6, and also has the effect of simplifying the shapes of the tip holder 203 and the shank 207 and reducing the manufacturing cost.

FIGS. 21 to 24 show a fourth embodiment of a turning tool unit according to the present invention. FIG. 21 is an exploded perspective view, FIG. 22 (a) is a perspective view showing a state in which a tip lock is removed, FIG. 22B is a perspective view of the assembled state, and FIG.
3A is a sectional view, FIG. 23B is a side view, and FIG. 24 is a bottom view. 21 to 24, the same components as those in the embodiment shown in FIGS. 1 to 6 are denoted by the same reference numerals, and description thereof is omitted.

In FIG. 21, a turning tool unit 3 for a lathe is used.
No. 01 has a chip 2, a chip holder 303, a chip lock 305, and a step 371 for disposing the chip holder 303, which has a bottom 372 and a wall 373 on the distal end side. A screw hole 74 is provided in the bottom portion 372.
The tip 2, the tip holder 303 and the tip lock 305 are connected to the shank 3
07, and the angle of the tip holder 303 attached to the shank 307 with respect to the axial direction of the shank 307 can be adjusted, and the tip holder 303 attached to the shank 307 can be fixed with the angle adjusted. Angle adjusting means.

The tip holder 303 has a circumferential surface 335 centered on the axis of the insertion hole 31 in a predetermined range of the outer circumference, and a circumference centered on the axis of the insertion hole 31 on one surface. A V-shaped angle adjustment fixing groove 337 is formed on the top.

The shank 307 is mounted on the wall 37 of the step 371 with the tip holder 303 attached.
A gap {gap 380 in FIG. 22A} is formed between the tip 3 and the outer peripheral surface of the chip holder 303 facing the wall 373, and is inserted into the bottom 372 of the step 371 to communicate with the gap. A hole 375 is formed.

The angle adjusting means has a screw hole 342 formed therethrough from one surface to the other surface, and a convex portion 343 inserted into the angle adjusting fixing groove 337 of the tip holder 303 on the other surface. And the screw portion is inserted into the insertion hole 375 of the shank 307 from the outer surface of the shank 307, and further inserted into the gap between the wall portion 373 and the tip holder 303. A part of the distal end side of the portion 382 projects from the gap and the screw hole 3 of the angle adjustment fixed top 341 is formed.
And an angle adjustment fixing screw 381 which is screwed into the screw 42.

The wall 3 on one side of the shank 307
On the base end side than 73, the circumferential surface 3 of the tip holder 303
A step portion 376 having the same height as that of the screw 35 is formed, and the step portion 376 has a V-shaped groove 3 on a circumference centered on the axis of the screw hole 74.
77 are formed. On the base end side of the groove 377, a wall portion 378 serving as a circumferential surface centered on the axis of the screw hole 74 is provided.
Are formed. The base end side of the wall portion 378 is a flat surface 3
It is 79.

On the other surface of the angle adjustment fixed top 341,
A protrusion 344 is formed at a position opposite to the protrusion 343, and the protrusion 344 is inserted into the groove 377.

The shank 307 is formed in the shape of a bar having a quadrangular cross section. A step 371 is provided on one end of the shank 307, and the base end of the shank 307 is attached to a chuck of a lathe machine main body. The shank 307 has a screw hole 7 at the bottom 372.
4 and a concave portion 80 are formed.

The circumferential surface 335 and the angle adjustment fixing groove 337 of the tip holder 303 are formed from the base end side of the tip holder 303 to a position slightly more distal end side than the insertion hole 31. A step 336 is formed inside the circumferential surface 335 on one surface of the chip holder 303. Inside the angle adjustment fixing groove 337, a wall portion 338 serving as a circumferential surface centered on the axis of the screw hole 31 is formed. An insertion hole 334 is formed at a position on one side of the chip holder 303 on the side of the insertion hole 31 adjacent to the angle adjustment fixing groove 337, and an insertion hole 352 is formed in the chip lock 305.
By inserting the pins 306 into the insertion holes 334 and 352, the angle of the mounting screw 9 between the tip holder 303 and the tip lock 305 about the axis is fixed.

As shown in FIG. 22A, the shank 30
7 has the tip holder 303 and the angle adjustment fixed top 341 attached thereto,
3, 344 are inserted into the angle adjustment fixing groove 337 of the tip holder 303 and the groove 377 of the shank 307, respectively. In this state, a gap 380 is formed between the circumferential surface 335 of the tip holder 303 and the wall 373 of the shank 307.

As shown in FIG. 22 (b), when the turning tool 301 for lathe is assembled, the tip holder 3
03 and the tip lock 305 are attached to the shank 307 by the attachment screws 9 with the tip 2 sandwiched therebetween. The tip holder 303 and the tip lock 305 are fixed by the mounting screw 9 and the pin 306.

As shown in FIG. 23A, the inner diameters of the insertion holes 334 and 352 of the tip holder 303 and the tip lock 305 are slightly smaller than the diameter of the pin 306 before being inserted. Holes 334, 352 and pin 306
Between the insertion holes 334, 3
The pin 306 does not come off from the socket 52.

A circular convex portion 37 is formed around the insertion hole 31 on the other surface of the chip holder 303. The convex portion 37 is inserted into the concave portion 80 of the shank 307.

Screw head 383 of angle adjustment fixing screw 381
Since the surface on the screw portion 382 side is formed in a conical shape and the concave portion 376 of the shank 307 is also formed in a mortar shape,
The screw head 383 can be locked in the recess 376 of the shank 307 without rattling.

The convex portions 343, 3 of the angle adjustment fixed top 341
Numerals 44 are inserted into the angle adjustment fixing groove 337 of the tip holder 303 and the groove 377 of the shank 307, respectively, and come into close contact therewith. The surfaces between the protrusions 343 and 344 of the angle adjustment fixed top 341 are in close contact with the step 336 of the tip holder 303 and the step 376 of the shank 307, respectively. In this state, the angle adjustment fixing screw 381 is tightened, and the screw portion 382 is screwed into the screw hole 342 of the angle adjustment fixing piece 341, whereby the tip holder 303 and the shank 307 can be completely fixed.

As shown in FIG. 23B, the cutting edge 22 of the tip 2 protrudes from the tip surfaces of the tip holder 303, the tip lock 305 and the shank 307. The angle adjustment fixed top 341 includes the tip holder 303 and the tip lock 3.
05 and the shank 307.

As shown in FIG. 24, on the other surface (back surface) of the shank 307, a screw hole 74 and a concave portion 376 are formed side by side from the tip side.

FIGS. 25 to 27 are explanatory views showing the angle adjustment of the turning tool unit. FIG. 25 (a) is a plan view showing a state where the chip 2 is fixed at an intermediate position.
26B shows a state in which the tip lock 305 is removed from the state of FIG. 25A, and FIG. 26A shows a state in which the tip of the tip 2 is fixed at a position inclined so as to face the base end side of the shank 307. 26B is a plan view, and FIG. 26B shows a state in which the tip lock 305 is removed from the state of FIG.
7 (a) is a plan view showing a state where the tip 2 is fixed at a position inclined so that the tip of the tip 2 faces the tip of the shank 307,
FIG. 27B shows the state of FIG.
05 has been removed.

As shown in FIGS. 25 (a) and 25 (b), when the chip 2 is fixed at the intermediate position, the mounting screw 9 is slightly loosened, and the angle adjustment fixing screw 381 is fixed to the angle adjustment fixing piece 341. Is slightly loosened, and the step portion 336 and the angle adjustment fixing groove 337 of the tip holder 303 and the step portion 376 and the groove 377 of the shank 307 are slid with respect to the angle adjustment fixed piece 341 so that the longitudinal direction of the shank 307 and the tip 2 The tip holder 303 is placed in a state where the longitudinal directions are orthogonal.
And the angle of the tip lock 305 are adjusted. In this state, the mounting screw 9 and the angle adjustment fixing screw 381 are strongly tightened, and the angle adjustment fixing groove 337 and the step 336 of the tip holder 303 and the step 376 and the groove 377 of the shank 307 are adjusted. The angle adjustment fixed top 341 is strongly pressed. As a result, the tip 2 and the tip holder 3 are
03 and the chip lock 305 are firmly fixed. In this state, the screw portion 382 of the angle adjustment fixing screw 381 is screwed through the gap 380 into the screw hole 342 of the angle adjustment fixing piece 341.
Is screwed into.

From such a state, FIG.
As shown in (b), the tip of the tip 2 has a shank 307.
If you want to fix to the state inclined to the base end side of the
And slightly loosen the angle adjustment fixing screw 381, shank 307
The tip holder 303 and the tip lock 305 are adjusted so that the tip side of the tip 2 is inclined to the base end side of the longitudinal shank 307. Tighten the mounting screw 9 and the angle adjustment fixing screw 381
07, the chip 2, the chip holder 303 and the chip lock 305 are firmly fixed.

From such a state, FIG.
As shown in (b), when the cutting edge 21 at the tip of the tip 2 is fixed so that the tip side of the shank 307 faces the side, the mounting screw 9 and the angle adjustment fixing screw 381 are slightly loosened and the tip 2 is moved to the tip side. And shank 307
The tip holder 303 and the tip lock 305 are adjusted so that the tip side of the tip 2 is inclined to the base end side of the longitudinal shank 307. Tighten the mounting screw 9 and the angle adjustment fixing screw 381
07, the chip 2, the chip holder 303 and the chip lock 305 are firmly fixed.

The tip of the tip 2 with respect to the tip holder 303 and the tip lock 305 (the cutting edge 21 in FIG. 27).
When adjusting the position, the mounting screw 9 is slightly loosened so that the chip 2 is slidable with respect to the chip holder 303 and the chip lock 305, and the chip 2 is slid to adjust the position. Loosen. Thereby, the position of the tip of the tip 2 with respect to the tip holder 303 and the tip lock 305 can be fixed at a desired position.

According to the fourth embodiment, the mounting screws 9 are removed or loosened to remove the tip holder 303.
By removing the fixing of the tip lock 305 with respect to the tip 2, the cutting edge of the tip 2 can be easily replaced, the position of the cutting edge 21 can be adjusted, and by loosening the mounting screw 9 and the angle adjusting fixing screw 381, the cutting edge 21 of the tip 2 can be removed.
The angle adjustment of 22 and 23 can be easily performed. Further, in the present embodiment, a gap 380 is generated, but the gap 380 is sufficiently wide and is not so curved, so that there is no fear that shavings from lathe processing are clogged. Accordingly, the same effects as those of the embodiment shown in FIGS. 1 to 6 can be obtained, and the step portion 336 and the angle adjustment fixing groove 337 of the tip holder 303 can be moved to some extent from the base end side of the tip holder 303 to the insertion hole 31. Since it is formed up to the position on the tip side, the tip holder 303 to which the tip 2 is attached and fixed and the tip lock 3
The range where the rotation of 05 can be adjusted is about ± 90 °. FIG.
Also, there is an effect that it can be considerably wider than the embodiment of the invention shown in FIG.

FIGS. 28 (a) and 28 (b) are explanatory views showing lathe processing using the turning tool unit shown in FIGS. 21 to 27. FIG. 28 (a) shows inner surface processing, and FIG. 28 (b) shows counterbore processing. ing.

In FIG. 28 (a), a workpiece 401 as a workpiece is attached to a chuck of a lathe machine body, a shank 307 of a lathe cutting unit 301 is attached to a holder 400 of the lathe machine, and the chuck is rotated. Thus, the material 401 is rotated about the rotation axis S1, the position of the holder 400 is moved, the cutting edge 21 of the tip of the cutting tool 2 is pressed against the rotating material 401, and the inner surface 402 of the material 401 is cut.

In FIG. 28 (b), a blank 411 as a workpiece is attached to a chuck of a lathe machine main body, and a shank 307 of a lathe cutting unit 301 is arranged on a side of the blank 411. Attach to 400,
By rotating the chuck, the material 401 is rotated by the rotation axis S.
1, the position of the holder 400 is moved, and the cutting edge 21 of the tip of the cutting tool 2 is attached to the rotating material 401.
Is pressed, and the base 413 of the projection 142 formed on the material 411 is cut to perform the spot facing. In addition, by adjusting the turning bit unit 301 to the state shown in FIG. 27, the shank 307 can be attached to the holder 400 disposed in front of the material 411 for processing.

According to such a method, FIGS.
7 can be used.
This is the same in the embodiment shown in FIGS.

FIGS. 29 to 31 show a fifth embodiment of a turning tool unit according to the present invention. FIG. 29 is an exploded perspective view, FIG. 30 is an assembled perspective view, and FIG. 31 is a sectional view. is there. 29 to 31, the same components as those in the embodiment shown in FIGS. 1 to 6 are denoted by the same reference numerals, and the description is omitted.

In FIG. 29 to FIG. 31, the lathe cutting tool unit 601 includes a chip 2 and a chip holder 603.
, Tip locks 605a and 605b, and a tip 603 having a bottom 672 and a wall 673 on the distal end side.
Is formed, and a shank 607 in which a screw hole 74 is formed in the bottom 672 of the step 671 is formed.
A mounting screw 609 for rotatably and fixedly attaching the tip 2, the tip holder 603 and the tip locks 605a and 605b to the shank 607, and an axial direction of the shank 607 of the tip holder 603 attached to the shank 607. The angle adjustment means is capable of adjusting the angle, and can be fixed in a state where the angle is adjusted.

Insert holes 605 into which the screw portions of the screws 609 are inserted are respectively formed in the chip locks 605a and 605b.
c, 605d are formed. Tip lock 605a
Is formed with an insertion hole 605e into which the pin 635 is inserted.

The tip holder 603 has a circumferential surface 633 centered on the axis of the insertion hole 631 in a predetermined range on the outer circumference, and a circumferential surface 633 centered on the axis of the insertion hole 631 on one surface. An angle adjustment fixed plane portion 634 is formed in a predetermined range.

The shank 607 is mounted on the tip holder 60.
A storage groove 675 is formed in a wall portion 673 facing an outer peripheral surface of the storage groove 3, and an insertion hole 676 is formed in a bottom portion of the storage groove 675.

The angle adjusting means is partially accommodated in the accommodating groove 675 and has a screw hole 642 formed therethrough from one surface to the other surface, and an angle adjusting fixed plane of the tip holder 603 on the other surface. Angle adjustment fixed piece 641 in which a contact portion 643 abutting on portion 634 is formed.
Then, the screw portion 682 is inserted from the outer surface of the shank 607 into the insertion hole 676 of the shank 607, further inserted into the storage groove 675, and a part of the screw portion 682 on the tip side is the angle adjustment fixed piece 641. And an angle adjustment fixing screw 681 screwed into the screw hole 642.

The chip lock is such that the chip 2 inserted into the chip housing groove 632 is directly pressed in the direction of pressing against the chip housing groove 632, and is connected to the chip holder 603 by the pin 635. Inner tip lock 6 that rotates with 603
05a and the inner tip lock 605a from the opposite side of the tip 2 and the angle adjustment fixing screw 6
An outer tip lock 605b that is connected to the shank 607 by a protrusion 683 at the distal end of 81 and maintains the same angle as the shank 607 is provided.

According to the present embodiment, when the angle adjustment fixing screw 681 is tightened, the contact portion 643 of the angle adjustment fixing piece 641 presses against the angle adjustment fixing flat portion 634 of the tip holder 603, and the shank 607 is pressed. On the other hand, since the tip holder 603 is fixed, the same effect as in the fourth embodiment shown in FIGS. 21 to 27 is obtained, and since the outer tip lock 605b is fixed to the shank 607, the tip 2 can be angled. Adjustment becomes easy.

FIGS. 32 to 34 show a sixth embodiment of a turning tool unit according to the present invention. FIG. 32 is an exploded perspective view, FIG. 33 is an assembled perspective view, and FIG. 34 is a sectional view. is there. 32 to 34, the same components as those in the embodiment shown in FIGS. 29 to 31 are denoted by the same reference numerals, and description thereof is omitted.

32 to 34, a turning tool unit 701 includes a chip 2 and a chip holder 703.
And tip locks 605a, 605b, and a bottom 772 and a wall 773 on the tip end side.
Is formed, and a shank 707 in which a screw hole 74 is formed in the bottom portion 772 of the step portion 771 is formed.
A mounting screw 609 for rotatably and fixedly attaching the tip 2, the tip holder 703 and the tip locks 605a and 605b to the shank 707, and an axial direction of the shank 707 of the tip holder 703 attached to the shank 707. The angle adjustment means is capable of adjusting the angle, and can be fixed in a state where the angle is adjusted.

The chip holder 703 has a chip accommodating groove 732 on one surface, and has the insertion hole 73 in a predetermined area on the outer periphery.
An angle-adjusting fixed inclined surface 734 having an expanded shape from one surface to the other surface with one axis as a center is formed.

The shank 707 includes a tip holder 70
A mortar-shaped storage groove 775 is formed in the wall 773 facing the outer peripheral surface of the storage groove 3, and an insertion hole 77 is formed in the bottom of the storage groove 775.
6 are formed.

A part of the angle adjusting means is housed in the housing groove 775, a screw hole 742 is formed to penetrate from one surface to the other surface, and an angle adjusting fixed inclined surface 734 of the tip holder 703 is formed on a side surface. And a screw portion 682 is inserted into the insertion hole 776 of the shank 707 from the outer surface of the shank 707, and further inserted into the storage groove 775. An angle adjustment fixing screw 681 that is screwed into the screw hole 742 of the angle adjustment fixing piece 741 is formed of a part of the screw portion 682 on the distal end side.

According to the present embodiment, when the angle adjustment fixing screw 681 is tightened, the contact portion 643 of the angle adjustment fixed piece 741 comes into pressure contact with the angle adjustment fixed inclined surface 734 of the tip holder 703, and On the other hand, since the tip holder 703 is fixed, the same effects as those of the fifth embodiment shown in FIGS. 29 to 31 can be obtained.

FIGS. 35 to 37 show a seventh embodiment of a turning tool unit according to the present invention. FIG. 35 is an exploded perspective view, FIG. 36 is a perspective view of an assembled state, and FIG. 37 is a sectional view. is there. 35 to 37, the same components as those in the embodiment shown in FIGS. 29 to 31 are denoted by the same reference numerals, and description thereof is omitted.

In FIGS. 35 to 37, the turning bit unit 801 includes a chip 2 and a chip holder 803.
And a tip lock 605a, 605b, and a bottom portion 872 and a wall portion 873 on the distal end side.
Is formed, and a shank 807 in which a screw hole 74 is formed in the bottom 872 of the step 871 is formed.
A mounting screw 609 for rotatably and fixedly attaching the chip 2, the chip holder 803 and the chip locks 605a and 605b to the shank 807, and an axial direction of the shank 807 of the chip holder 803 mounted on the shank 807. The angle adjustment means is capable of adjusting the angle, and can be fixed in a state where the angle is adjusted.

The chip holder 803 has a chip accommodating groove 832 on one surface, and has a circumferential surface 834 around the axis 831 of the insertion hole on the outer periphery. The shank 807 has a storage groove 875 formed in a wall 873 facing the outer peripheral surface of the chip holder 803, and an insertion hole 876 formed in the bottom of the storage groove 875.

The angle adjusting means is formed in a ring shape, and has an inclined surface 902 whose inner periphery converges toward the bottom 872 of the stepped portion 871 of the shank 807 around the center of the ring shape. In addition to forming a circumferential surface 903 centered on the axis of the ring shape, a wall portion is cut in the direction of the axis to form a cut portion 904, and a part is housed in the housing groove 875, and a portion of the outer periphery is formed. Circumferential surface 903
Is fixed to the circumferential surface 834 of the tip holder 803.
The angle adjustment fixed piece 911 which is accommodated in the first and the second surfaces, has a screw hole 912 formed therethrough from one surface to the other surface, and has a contact portion 913 formed on a side surface thereof for contacting the inclined surface 902 of the angle adjustment fixed ring 901. And the screw portion 682 is moved from the outer surface of the shank 807 to the shank 807.
The angle at which a part of the distal end side of the screw portion 882 is screwed into the screw hole 912 of the angle adjustment and fixing piece 911 when inserted into the accommodation groove 875 and the angle adjustment and fixing ring 901. And an adjustment fixing screw 881.

The outer tip lock 605b is connected to the shank 807 by a projection 883 at the tip of the angle adjusting fixing screw 881, so as to maintain the same angle as the shank 807.

According to the present embodiment, when the angle adjustment fixing screw 881 is tightened, the abutting portion 913 of the angle adjustment fixing piece 911 is moved to the circumferential surface 9 of the angle adjustment fixing ring 901.
03, the notch 904 is opened, the outer diameter of the angle adjustment fixing ring 901 is enlarged, and the angle adjustment fixing ring 90
1 is the circumferential surface 8 of the tip holder 803.
34, and press the tip holder 7 against the shank 707.
03 is fixed, so that the fifth
The same effect as that of the embodiment can be obtained.

In the fourth embodiment shown in FIGS. 21 to 27, the outer shape of the angle adjustment fixed piece 341 is circular for ease of processing, but the outer shape is rectangular or square. May be used. Further, the angle adjustment fixed top 341 is formed in a circumferential shape having the same localization as the wall portion 378 so that the base side surface is in contact with the wall portion 378 of the shank 307 on a wide surface. May be formed in a circular shape having the same locality as the wall portion 338 so as to contact the wall portion 338 of the tip holder 303 on a wide surface, and one and the other side surfaces may be formed as flat surfaces. Thereby, the position of the angle adjustment fixed top 341 is stabilized, and the angle adjustment fixed top 3
41, the fixing strength of the tip holder 303 is improved.

In the fourth embodiment shown in FIGS. 21 to 27, the tip holder 303 is
Although the angle between the tip lock 305 and the tip lock 305 is fixed, the base end side of the tip lock 305 is formed to be longer than that shown in FIGS. 21 to 27, and a pin insertion hole is formed in this extension portion, while the shank 307 is formed. Forming a pin insertion hole in the surface 379,
The angle between the tip holder 303 and the shank 307 may be fixed by inserting the pin 306 into the pin insertion hole of the extension of the tip lock 305 and the pin insertion hole of the surface 379 of the shank 307. In this case, when adjusting the angle, only the tip 2 and the tip lock 305 are adjusted in angle. This can prevent the base end side of the tip lock 305 from protruding outward.

In the second embodiment shown in FIGS. 8 to 12, the shields 141 and 142 for closing the gap between the tip holder 103 and the shank 107 are attached to the tip holder 103. May be attached to the shank 107 side.

FIGS. 1 to 6 and FIGS. 8 to 3
In 7, the chip was used as a component of the turning byte unit. However, since the chip is sold separately, it is possible to sell the turning byte unit excluding the chip.
For this reason, the definition of the lathe byte unit includes a component obtained by removing the chip from the components.

[0138]

As described above, according to the present invention, the cutting edge can be easily replaced, and the position and angle of the cutting edge can be easily adjusted. In addition, when the length of the tip becomes unsuitable for use, only the tip needs to be replaced, so that the shank can be reused and the cost required for lathe processing can be reduced. Further, since the angle of the cutting edge with respect to the material can be adjusted on the side of the lathe cutting tool unit, work efficiency is improved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a turning tool unit according to a first embodiment of the present invention.

FIG. 2 is a perspective view of an assembled state of the turning tool unit of FIG. 1;

FIG. 3 is a sectional view of the turning tool unit of FIG. 1;

FIG. 4 is a side view of the turning tool unit of FIG. 1;

FIG. 5 is an explanatory view showing a case in which a tip of the turning tool unit of FIG. 1 is set at an intermediate position.

FIG. 6 is an explanatory view showing a case in which a tip of the turning tool unit of FIG. 1 is tilted.

FIG. 7 is a perspective view of an assembled state showing a modification of the first embodiment of the lathe bite unit of FIG. 1;

FIG. 8 is an exploded perspective view showing a turning tool unit according to a second embodiment of the present invention.

FIG. 9 is a perspective view of the lathe turning unit of FIG. 8 in an assembled state.

FIG. 10 is a side view of the turning tool unit of FIG. 8;

FIG. 11 is an explanatory view showing a case in which the tip of the turning tool unit of FIG. 8 is set at an intermediate position.

FIG. 12 is an explanatory view showing a case in which the tip of the turning tool unit of FIG. 8 is tilted.

FIG. 13 is an exploded perspective view showing a turning tool unit according to a third embodiment of the present invention.

FIG. 14 is a perspective view of the lathe turning unit of FIG. 13 in an assembled state.

FIG. 15 is a sectional view of the turning tool unit of FIG. 13;

FIG. 16 is a side view of the turning tool unit of FIG. 13;

FIG. 17 is a bottom view of the turning tool unit of FIG. 13;

FIG. 18 is a bottom view of the tip lock of FIG. 13 as viewed from the back side.

FIG. 19 is an explanatory view showing a case in which the tip of the turning tool unit of FIG. 13 is set at an intermediate position.

FIG. 20 is an explanatory view showing a case in which the tip of the turning tool unit of FIG. 13 is tilted.

FIG. 21 is an exploded perspective view showing a turning unit for a lathe according to a fourth embodiment of the present invention.

FIG. 22 is a perspective view of the turning tool unit of FIG. 21 in a state where a tip lock is removed and an assembled state.

23 is a sectional view and a side view of the turning tool unit of FIG. 21.

FIG. 24 is a bottom view of the turning tool unit of FIG. 21;

FIG. 25 is an explanatory view showing a case in which the tip of the turning tool unit of FIG. 21 is set at an intermediate position.

FIG. 26 is an explanatory diagram showing a case where the cutting edge of the tip of the turning tool unit of FIG. 21 is inclined at the base end side of the shank;

FIG. 27 is an explanatory view showing a case in which the cutting edge of the tip of the turning bit unit of FIG. 21 is directed to the tip side of the shank;

FIG. 28 is an explanatory view showing lathe processing using the turning tool unit shown in FIGS. 21 to 27;

FIG. 29 is an exploded perspective view showing a turning tool unit according to a fifth embodiment of the present invention.

FIG. 30 is a perspective view of the lathe turning unit of FIG. 29 in an assembled state.

FIG. 31 is a sectional view of the lathe turning unit of FIG. 29 in an assembled state.

FIG. 32 is an exploded perspective view showing a turning tool unit according to a sixth embodiment of the present invention.

FIG. 33 is a perspective view of the lathe turning unit of FIG. 32 in an assembled state.

FIG. 34 is a sectional view of the lathe turning unit of FIG. 32 in an assembled state.

FIG. 35 is an exploded perspective view showing a turning tool unit according to a sixth embodiment of the present invention.

FIG. 36 is a perspective view of the lathe turning unit of FIG. 35 in an assembled state.

FIG. 37 is a sectional view of the lathe cutting tool unit of FIG. 35 in an assembled state.

FIG. 38 is a perspective view showing a first example of a conventional cutting tool.

FIG. 39 is a perspective view showing a second example of a conventional cutting tool.

FIG. 40 is a perspective view showing a third example of a conventional cutting tool.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lathe byte unit 2 Tip 3 Tip holder 5 Tip lock 7 Shank 9 Mounting screw 21, 22, 23 Cutting edge 31, 51 Insertion hole 32 Chip storage groove 33 Projection 71 Step 72 Bottom 73 Wall 74 Screw hole 75 Projection Storage groove 76, 77 Angle adjustment fixing screw hole 78, 79 Angle adjustment fixing screw

Claims (13)

[Claims] 1. A lathe cutting tool unit for holding a chip on which a cutting edge used for lathe processing is formed or a holder holding the chip, wherein the tip is formed with at least a part of the cutting edge of the chip protruding outward. A chip holder in which a chip housing groove for housing the chip or a holder housing groove for housing the holder is formed; and a chip or holder attached to the chip holder and inserted in the chip housing groove or the holder housing groove. Or a tip lock for pressing down in a direction in which the tip holder is pressed against the holder storage groove; and a shank for arranging the tip holder. 2. A lathe cutting tool unit for holding a chip having a cutting edge used for lathe processing or a holder holding the chip, wherein the tip is formed with at least a part of the cutting edge of the chip protruding outward. A chip holder in which a chip housing groove for housing the chip or a holder housing groove for housing the holder is formed; and a chip or holder attached to the chip holder and inserted in the chip housing groove or the holder housing groove. Alternatively, a tip lock that presses in a direction in which the tip holder is pressed against the holder housing groove, a shank that arranges the tip holder in a rotatable state, and an angle adjustment of the tip holder arranged in the shank with respect to the axial direction of the shank is possible. And angle adjusting means that can be fixed while adjusting the angle. Lathe for byte unit that. 3. A lathe cutting tool unit for holding a chip having a cutting edge used for lathe processing or a holder holding the chip, wherein an insertion hole is formed from one surface to the other surface so as to penetrate therethrough. And a chip housing groove for housing the chip or a holder housing groove for housing the holder in a state in which at least a part of the cutting edge of the chip protrudes outward at a predetermined distance from the insertion hole forming position on one surface. And a chip holder, wherein an insertion hole is formed penetrating from one surface to the other surface, and a chip or holder inserted in the chip storage groove or holder storage groove is accommodated in the chip storage groove or holder storage. A chip lock for pressing down in a direction in which the chip holder is pressed against the groove, and a step portion having a bottom portion and a wall portion on the distal end side for disposing the chip holder are formed. A shank having a screw hole formed at the bottom of the portion; and a screw portion inserted into the insertion hole of the tip lock and the tip holder and screwed into the screw hole of the shank, thereby securing the tip, the tip holder and the tip lock. A mounting screw rotatably and fixably attached to the shank; and an angle adjustment capable of adjusting the angle of the tip holder attached to the shank with respect to the axial direction of the shank, and fixing the tip holder in an adjusted angle. Means for a lathe, characterized by comprising: 4. A lathe cutting tool unit for cutting a material by pressing a cutting edge onto a material attached to a lathe processing machine, comprising: a tip on which the cutting edge is formed; a holder holding the tip; A tip that penetrates through the surface and has an insertion hole formed therein, and that stores the chip in a state where at least a part of the cutting edge of the tip protrudes outward at a position spaced from the insertion hole formation position on one surface by a predetermined distance A chip holder in which a housing groove or a holder housing groove for housing the holder is formed, and an insertion hole penetrating from one surface to the other surface and formed in the chip housing groove or the holder housing groove. A tip lock that presses the tip or holder in a direction in which the tip or holder is pressed against the tip storage groove or the holder storage groove; A step portion for disposing a tip holder is formed, and a shank having a screw hole formed in the bottom portion of the step portion, and the screw portion is inserted into the insertion hole of the tip lock and the tip holder and screwed into the screw hole of the shank. By doing so, a mounting screw for rotatably and fixedly attaching the tip, the tip holder and the tip lock to the shank, and an angle adjustment of the tip holder attached to the shank with respect to the axial direction of the shank, and A turning tool unit for a lathe, comprising: an angle adjusting means capable of being fixed in an adjusted state. 5. A part of an outer peripheral surface of the tip holder is formed on a circumferential surface centered on an axis of an insertion hole of the tip holder, and a stepped wall formed on the shank is formed on the circumferential surface. 4. The device according to claim 3, wherein the sliding member is formed so as to slide in close contact with the surface.
Or the turning unit for a lathe according to 4. 6. A gap is formed between a wall of the step and an outer peripheral surface of the chip holder facing the wall in a state where the tip holder is attached to the shank. The lathe turning unit according to claim 3 or 4, wherein a shield made of an elastic member for closing is attached to one of the shank and the tip holder. 7. A state in which the angle adjusting means is formed on a surface of an outer periphery of the tip holder, and is formed from a wall of the shank toward a base end side, and the protrusion has a gap. And a first and second angle-adjustment fixing screw formed to penetrate from the inner wall on one side and the other side of the shank to one and the other outer side surface of the shank, respectively. First and second fixing the protrusions by screwing the holes into the pair of angle adjustment fixing screw holes from the outside of the shank so that the tips contact the side surfaces on one and the other sides of the protrusions, respectively. The turning tool unit according to any one of claims 3 to 6, further comprising: two angle adjustment fixing screws. 8. The slit adjusting means, wherein: a slit hole is formed on a circumference centered on an axis of the insertion hole of the tip holder so as to penetrate from one surface to the other surface of the tip holder; An outer diameter larger than the width of the slit hole, a nut arranged on one surface side of the tip holder, and an insertion hole formed at the bottom of the step in the shank and communicating with the slit hole of the tip holder; A screw portion is inserted into an insertion hole of the shank and a slit hole of the tip holder from an outer surface of the shank, and a part of a tip portion of the screw portion projects from the slit hole and is screwed into a screw hole of the nut. The turning bit unit for a lathe according to any one of claims 3 to 6, further comprising: an angle adjustment fixing screw. 9. The tip holder has a circumferential surface centered on the axis of the insertion hole in a predetermined range of the outer periphery, and has one surface on a circumference centered on the axis of the insertion hole. An angle adjustment fixing groove is formed in the shank, and the shank forms a gap between the wall of the step portion and the outer peripheral surface of the chip holder facing the wall in a state where the tip holder is attached. An insertion hole communicating with the gap is formed at the bottom of the step, and the angle adjusting means is formed with a screw hole penetrating from one surface to the other surface, and the tip holder is formed on the other surface. An angle adjustment fixing piece having a projection inserted into the angle adjustment fixing groove, a screw portion being inserted into an insertion hole of the shank from an outer surface of the shank, and a gap between the wall portion and the tip holder. Into one end of the threaded part. Lathe byte unit according to claim 3 or 4 but characterized in that it comprises a and an angle adjusting fixing screw screwing into the threaded hole of the angle adjusting fixing piece protruding from the gap. 10. The tip holder has a circumferential surface centered on the axis of the insertion hole in a predetermined range of the outer circumference, and has one surface on a circumference centered on the axis of the insertion hole. The shank forms a storage groove in a wall portion facing the outer peripheral surface of the chip holder, and an insertion hole is formed in a bottom portion of the storage groove. A part is accommodated in the accommodating groove, and a screw hole is formed penetrating from one surface to the other surface, and an abutting portion is formed on the other surface to abut on the angle adjusting fixed flat portion of the chip holder. And a screw part is inserted into the insertion hole of the shank from the outer surface of the shank, and further inserted into the storage groove, and a part of the tip of the screw part is a screw of the angle adjustment fixed piece. Angle adjustment fixing screw to screw into the hole Lathe byte unit according to claim 3 or 4, characterized in that it comprises a. 11. The tip holder has an angle-adjusting fixed inclined surface having a shape that expands from one surface toward the other surface around the axis of the insertion hole in a predetermined range on the outer periphery, The shank has a storage groove formed in a wall portion facing an outer peripheral surface of the chip holder, and an insertion hole is formed in a bottom portion of the storage groove. The angle adjusting means is partially stored in the storage groove. A screw hole is formed penetrating from the surface of the tip holder to the other surface, and an angle adjustment fixed piece having a contact portion formed on the side surface to abut against the angle adjustment fixed inclined surface of the tip holder; An angle adjustment fixing screw that is inserted from the outer surface of the shank into the insertion hole of the shank, is further inserted into the storage groove, and a part of the distal end side of the screw portion is screwed into the screw hole of the angle adjustment fixing piece. Characterized by having Lathe byte unit according to claim 3 or 4. 12. The tip holder has a circumferential surface formed around the axis of the insertion hole on the outer periphery, and the shank has a storage groove formed on a wall portion facing the outer circumferential surface of the tip holder. An insertion hole is formed at the bottom of the storage groove, and the angle adjusting means is formed in a ring shape, and the inner periphery is inclined toward the bottom of the step portion of the shank about the axis of the ring shape. The surface is formed, and while forming a circumferential surface around the ring-shaped axis on the outer periphery, the wall is cut in the direction of the axis,
An angle adjusting and fixing ring in which a part of the outer circumferential surface is in contact with the circumferential surface of the tip holder in a state where a part is housed in the housing groove; A screw hole is formed, and an abutment portion is formed on a side surface of the abutment portion for abutting against an inclined surface of the angle adjustment fixing ring; And an angle adjustment fixing screw that is inserted into the storage groove and the angle adjustment fixing ring, and a part of the tip end side of the screw portion is screwed into a screw hole of the angle adjustment fixing piece. The turning tool unit according to claim 3 or 4, wherein the turning tool unit is a turning tool. 13. The chip lock presses a chip or a holder inserted into the chip storage groove or the holder storage groove in a direction in which the chip or the holder is pressed against the chip storage groove or the holder storage groove, and is connected to the chip holder. An inner tip lock that rotates together with the holder, and an outer tip lock that presses the inner tip lock from the opposite side of the tip or the holder and is connected to the shank to maintain the same angle as the shank. The lathe cutting tool unit according to any one of claims 2 to 12, wherein