JPH03277413A - Throw away type cutter - Google Patents

Abstract

PURPOSE:To change the following constraining face and to facilitate the deflection adjusting work of a tip, by providing the face which constrains the tip movement in the fitting groove of the tool main body and also forming a recessed part on the outer peripheral face of the tool main body and flaring the recessed part. CONSTITUTION:A fitting groove 24 and tip fitting seat 26 are formed at the tip outer peripheral part of a tool main body 21 and a constraining face 26b faced to the tool tip side is provided on the fitting seat 26. A recessed part 27 is also formed on the outer periphery of the tool main body 21 positioned at the tool base end side instead of the containing face 26b. An adjusting screw 28 is inserted into the recessed part 27, the peripheral face of the pressing part 36 of the adjusting screw 28 and the internal wall of the tapered hole 29 of the recessed part 27 are closely fitted, a tip 7 is inserted into the fitting seat 26 in succession and loosely tightened by a clamp screw 12. The tip 7 having the largest distance L is then made a reference tip and the adjusting screw 28 is tightened for the other tip 7, then the pressing part 36 presses the internal wall of the tapered hole 29, the constraining face 26b is displaced to the tool tip side, the distance L is increased with the tip 7 being pushed out simultaneously as well and conformed to the distance L of the reference tip.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to a throw-away type tool, such as a face mill, a side cutter, or an end mill, in which a plurality of cutting tips are detachably attached to the outer periphery of the tool body. Regarding cutters.

[Prior Art] Conventionally, as this type of indexable cutter, for example, the indexable face milling cutter shown in FIGS. 29 and 30 is known.

The face milling cutter 1 shown in these figures has a plurality of mounting grooves 5 formed on the outer periphery of the tool body 2 at equal pitches along the circumferential direction of the tool. Chip mounting seats 6 are formed on one wall side of these mounting grooves 5, and these chip mounting seats 6 are provided with indexable inserts (hereinafter abbreviated as chips) made of cemented carbide and having a substantially square plate shape. ) 7 is seated via a supporter 8, and the chip 7 and supporter 8 are pressed by a wedge member 9a and a supporter fixing wedge 9b installed in the mounting groove 5, and are removably mounted.

Here, in a cutting tool such as a face milling cutter that uses a plurality of tips 7 as described above, the distance from the mounting surface 2a that comes into close contact with the end surface of the machine spindle (not shown) to the corner cutting edge 7a of each tip 7. It is essential to maintain the machining accuracy to keep the same chip 7, but in reality, there are machining errors in the chip mount 6, the chip 7, etc., so simply attach the same chip 7 to the 6 If it is only attached to the above distance, there will be considerable variation in the above distance.

Therefore, in such a case, it is necessary to perform work to adjust the distance (hereinafter referred to as runout adjustment work) when installing each tip 7. For example, in the face milling cutter 1 described above, a recess 10 is formed in the supporter 8. The wall surface 10 of this recess 10
a and the side surface 7b of the chip 7 to restrain the movement of the chip 7 in the direction of the tool axis ○, and the recess 1o
By adjusting the distance S from the wall surface 10a to the end surface 8a of the supporter 8, the above distances are made to match.

That is, when installing the tip 7 in the above-mentioned face milling cutter, a plurality of supports 8 having different distances S are first prepared. Note that the range of change of this distance S is usually 6
It is set to about μm to 8 μm.

Next, a distance S is determined from among the supports 8 having different dimensions.
or the same supporter 8 is selected and each chip 7 is mounted in each recess 10, and then each supporter 8 is attached to the chip mounting seat 6 so that each end surface 8a is in close contact with the wall surface 6a of the chip mounting seat 6. insert. Subsequently, each wedge member 9a, 9
Lightly tighten the clamp screws 11 and 12 inserted through b and lightly press down each chip 7 and supporter 8. 7 m), the distances of the chips 7 are matched by replacing the supports 8 corresponding to the chips 7 as appropriate.

That is, for the chip 7 whose distance [L is smaller than the reference chip 7m, replace it with the supporter 8 whose distance S is larger,
On the other hand, if the chip 7 has a large distance, it is replaced with a supporter 8 with a smaller distance S, is mounted on the chip mounting seat 6 again, and the distance is measured again. Then, each chip 7 is
The above procedure is repeated for each chip 7, and then each chip 7 and supporter 8 are firmly pressed down with wedge members 9a and 9b, thereby completing the deflection adjustment work for each chip 7.

[Problem to be solved by the invention] However, when performing the runout adjustment work using the above procedure, it is necessary to repeatedly attach and detach the supporter 8 for each chip 7, so it is difficult to attach and remove the supporter 8 for each chip 7. This has the drawback that it takes a lot of time to complete the process, and the efficiency of work such as changeovers is significantly reduced.

Furthermore, since a large number of supports 8 of different dimensions must be prepared, the number of parts increases, and as a result, it takes time and effort to maintain and manage the parts, and the cost required for parts management also increases. Ta.

The present invention has been made against this background, and an object of the present invention is to provide an indexable cutter that can facilitate tip deflection adjustment work and greatly improve work efficiency.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the indexable cutter of the present invention has a tip installed in the mounting groove of the tool body, facing the side surface of the tip facing the other end of the tool body. forming a restraining surface that restrains movement in the tool axis direction, and forming a recess that recesses toward the center of the tool body on the outer periphery of the tool body located on the other end side of the tool body with respect to the restraining surface; Inside this recess,
A pressing means is provided for pressing the inner wall of the recess and expanding the recess.

In this case, to expand the adjustment range during runout adjustment work,
It is effective to form a notch groove opening into the recess on the outer circumference of the tool body.

Further, various configurations may be used for the recess and the pressing means, but for example, the recess may be formed by forming a hole opening in the outer circumference of the tool body and a hole located closer to the center in the radial direction of the tool than the hole. The suppressing means is constructed of a pressing part that comes into contact with the inner wall of the hole, and a male screw threadedly engaged with the female thread to move the pressing part in the axial direction of the hole. It is preferable that the inner wall of the hole and at least one of the circumferential surface of the pressing part be formed into a tapered surface shape.

When the recess and the pressing means have the above configuration, the outer peripheral part of the tool body where the recess is formed is positioned closer to the center in the tool radial direction than the end of the indexable tip on the tool outer peripheral side. It is preferable to form it in the shape of a receding cylindrical surface.

[Function] According to the above configuration, the circumference of the recess is elastically deformed by pushing the recess wider with the pressing means, and the position of the restraining surface of the mounting groove changes with this deformation. Therefore, by adjusting the amount by which the recess is pushed apart by the pressing means, the position of the tip in the tool axis direction can be changed, and thereby the distance from the tool mounting surface to each tip can be adjusted.

Here, when a notched groove opening into the recess is formed, the peripheral edge of the recess is cut out, so the amount of deformation of the recess by the pressing means increases, and the adjustment range of the distance is expanded.

Further, as described above, when the recess is composed of a hole and a female thread, the pressing means is composed of a pressing part and a male thread, and at least one of the hole and the pressing part is a tapered surface. By increasing or decreasing the screwing amount of the male thread part into the female thread part, the force with which the pressing part presses against the inner wall of the hole part changes, and the amount of elastic deformation of the recess part changes, making the above runout adjustment work easier. can be done. When the recess and the pressing means are configured as described above, the outer periphery of the tool body on which the recess and the pressing means are provided is formed into a cylindrical surface that recedes toward the center in the radial direction of the tool than the outer periphery of the tip. By doing so, the thread diameter of the male threaded portion and the threaded portion, or the diameter of the pressing portion or the hole portion can be freely set without causing the outer peripheral portion of the tool to protrude in the radial direction.

[Embodiment] Hereinafter, an embodiment in which the present invention is applied to a face milling cutter will be described with reference to FIGS. 1 to 5.

Note that the same components as those of the conventional example shown in FIGS. 29 and 30 described above are given the same reference numerals, and the explanation thereof will be simplified.

As shown in FIGS. 1 and 2, the face milling cutter 20 of this embodiment has a tool body 21 with a
A plurality of mounting grooves 24 (only the - mounting grooves are shown in the figure) opening in the tip surface 22 and outer circumferential surface 23 of the tool 1, and a chip pocket 25 recessed in a substantially arc shape toward the center in the tool radial direction are arranged in the circumferential direction of the tool. are formed at equal pitches along the mounting grooves 24.
A chip mounting seat 26 is formed on the side wall intersecting with the chip pocket 25, and a substantially square plate-shaped cemented carbide chip 7 is mounted on the chip mounting seat 26, and the chip 7 is inserted into the mounting groove. 24 with a wedge member 9a attached to the clamp screw 12.

Here, as shown in FIGS. 1 to 4, the chip mounting seat 26 has a bottom surface 26 that is in close contact with the top surface 7c of the chip 7.
a, a restraining surface 26b facing the tool tip side, and a wall surface 26c facing the tool outer circumferential side, and these restraining surfaces 2
6b and the wall surface 26c, respectively, face the proximal end side of the tip 7 in the tool axis direction (in close contact with the side surface 7b and the side surface 7d facing the center side in the tool radial direction, and rotate the corner cutting edge 7a in the tool axis O direction and the radial direction, respectively). It is designed for positioning.

A recess 27 recessed toward the center in the tool radial direction is formed in the outer circumference of the tool body 21 located closer to the tool proximal end than the restraint surface 26b of the tip mounting seat 26. An adjustable suppressing means 28 for pushing the recess 27 wider is provided. These recesses 27 and adjustment screws 28 are connected to the tip 7 from the mounting surface 21a of the tool body 2.
This is provided to adjust the distance to the corner cutting edge 7a, and the details thereof will be explained below.

That is, the recess 27 is formed on the outer peripheral surface 23 of the tool body 21.
It consists of a tapered hole (hole portion) 29 whose diameter gradually decreases toward the center in the radial direction of the tool, and a circular threaded portion 30 that is formed on the small diameter end side of the tapered hole 29 and is coaxial with the tapered hole 29. has been done.

The tapered hole 29 is formed so that a part of its periphery reaches the chip pocket 25, and its mouth is cut out. Further, around the tapered hole 29, a notched groove 31 having one end opening into the tapered hole 29 and the other end opening into the mounting groove 24 is approximately parallel to the restraining surface 26b of the chip mounting seat 26. It is formed like this. Further, on one end side of the restraining surface 26b of the chip mounting seat 26, a relief part 32 is formed to avoid interference with the ridgeline part of the chip 7 mounted on the chip mounting seat 26, and these notched grooves are formed. 31 and relief portion 32, the chip mounting seat 26
In the part from the restraint surface 26b to the tapered hole 29,
A protruding wall portion 33 is formed on the bottom surface of the mounting groove 24 . A groove 34 that opens into the mounting groove 24 is formed behind the recess 29 .

On the other hand, the adjustment screw 28 is connected to the female threaded portion 3 of the recessed portion 27.
0, and a pressing portion 36 that is coaxial with the male thread portion 35. The circumferential surface of the pressing portion 36 is formed into a tapered surface whose diameter gradually decreases as it approaches the male threaded portion 35, and its taper angle is the same as that of the tapered hole 29 of the recessed portion 27, or slightly smaller. It is largely determined that

In the face milling cutter 20 configured as described above, the tip 7 is mounted on the tip mounting seat 26 of the tool body 20.
When installing, the distance can be adjusted individually by operating the adjustment screw 28.

The procedure will be explained in detail below.

That is, in the face milling cutter 20 of this embodiment, when attaching the tip 7 to the tool body 21, first insert the adjusting screw 28 into each recess 27 of the tool body 21, and then insert each male threaded portion 35 into the recess 27. It is screwed into the female threaded portion 30 to bring the circumferential surface of the pressing portion 36 and the inner wall of the tapered hole 29 into close contact with appropriate strength.

Next, insert each chip 7 into the chip mounting seat 26 so that each side surface 7b is in close contact with the restraining surface 26b of each chip mounting seat 26, and then loosely tighten the clamp screw 12 inserted through the wedge member 9a. By inserting each chip 7
is lightly held between the wedge member 9a and the bottom surface 26a of the chip mounting seat 26.

After completing the above steps, place the tool body 21 on the surface plate with its mounting surface 21a facing downward, and then
The difference in distance between each chip 7 is measured using a measuring means such as a dial cage.

And the distance is 11! The tip 7 with the largest L, in other words, the tip 7 that protrudes most from the tip of the tool, is set as the reference tip 7m, and by tightening each adjustment screw 28, the distance between each tip 7 is made to match the distance of the reference tip 7m. .

That is, when the adjustment screw 28 is tightened, the pressing portion 36 presses the inner wall of the tapered hole 29 and the tapered hole 29 is expanded, so that the convex wall formed between the tapered hole 29 and the restraint surface 26b The portion 33 is elastically deformed toward the tool tip side, and accordingly, the restraining surface 26b of the tip mounting seat 26 is displaced toward the tool tip side, and each tip 7 is pushed toward the tool tip side, increasing the distance. Therefore, the distance L of the reference chip 7m
By adjusting the amount of tightening of each adjusting screw 28 according to the difference between the two tips, it is possible to make the distance between each tip 7 match the reference tip 7m.

If the tip 7 to be adjusted protrudes beyond the distance of the reference tip 7m toward the tool tip, loosen the corresponding adjustment screw 28 to increase the force with which the pressing portion 36 presses the inner wall of the tapered hole 29. It would be good if it could be reduced. That is, by loosening the adjustment screw 28, the convex wall portion 33 retreats toward the tool base end, and the restraint surface 26b is displaced toward the tool base end. Surface 26b
The above distance can be reduced by pushing the tool toward the proximal end side until it comes into close contact with the tool.

After adjusting the distance between the chips 7 by operating the adjustment screws 28 as described above, the wedge member 9 that presses each chip 7
By firmly tightening the clamp screw 12 of a, each chip 7 is firmly tightened.
are attached to the tool body 21 with their distances matched.

Here, regarding the adjustment range of the distance using the adjustment screw 28, the thread diameter of the male threaded portion 35 of the adjustment screw 28, the width of the convex wall portion 33 [(see Fig. 4), or the inner diameter of the tapered hole 29, It can be changed as appropriate by changing the shape of the periphery of the chip mounting seat 26, such as the Taber angle. Incidentally, in this embodiment, the Taber angle of the pressing portion 36 of the adjusting screw 28 is set to 1.
When the width t of the 0° convex wall portion 33 was set to 2 ml11, and the thread diameters of the female thread portion 30 and male thread portion 35 were set to 5 mm, the fifth
As shown in the figure, the amount of screwing in the axial direction of the adjustment screw 28 (
It was confirmed that when H) was changed by about 0.6 mm, the amount of change in distance (α) changed by about 0.05 mm, and the distance could be adjusted in approximately 0.01ff1m units.

As described above, in the face milling cutter 20 of this embodiment, the tightening of the adjustment screw 28 is changed by changing the amount.
Since the distance l1lIL of each tip 7 from the tool mounting surface 21a can be increased or decreased by changing the position of the restraining surface 26b that positions the tip 7 in the tool axis direction, the tip 7
The deflection adjustment work can be easily performed, and as a result, the time required for chip mounting work can be shortened and work efficiency can be greatly improved.

In addition, when performing runout adjustment work, there is no need to prepare a large number of adjustment parts such as supports with different sizes as in the past, so the effort required for maintenance management of parts is saved and the cost required for maintenance management is significantly reduced. It can also be reduced.

Furthermore, in this embodiment, in particular, a part of the periphery of the two tapered holes is opened into the chip pocket 25, and a notch groove 31 that opens into the recess 27 is formed on the outer periphery of the tool body 21. Because the mouth is cut out,
In particular, the tightening of the adjustment bolt L: 28 has the effect of increasing the amount of elastic deformation of the restraint surface 26b. However, it is not always necessary to cut out the recess 27 with the notch groove 31 in this way; for example, the thread diameter of the adjusting screw 28 can be set sufficiently large, or the width t from the inner wall of the tapered hole 30 to the restraint surface 26b can be adjusted. It may be omitted if the restraint surface 26b can be sufficiently displaced by, for example, setting a portion of .

The configurations shown in the above embodiments are merely examples of the present invention, and the present invention is not limited thereto.
Various other configurations are also possible. Hereinafter, embodiments of a plurality of ponds will be described with reference to FIGS. 6 to 28. In the following description, the same components as those in the above-described embodiment or conventional example are denoted by the same reference numerals, and the description thereof will be omitted.

The embodiment shown in FIGS. 6 to 9 applies the present invention to a face milling cutter in which the tip 7 is given a predetermined corner angle θ, similar to the conventional example shown in FIGS. 29 and 30 described above. This is an example.

That is, the face milling cutter 40 shown in FIGS. 6 to 9
A plurality of mounting grooves 42 are formed on the outer periphery of the tip of the tool body 41, and a flat sheet 43 is placed on the tip mounting seat 26 formed in these mounting grooves 42. Chip 7 has a predetermined corner angle θ (4 in the illustrated example).
These chips 7 are clamped by a wedge member 9a installed in the mounting groove 42 and held between the wedge member 9a and the sheet 43.

Here, the outer circumferential surface 41a of the tool body 41 has the tip 7
It is formed into a cylindrical surface shape that recedes toward the center in the tool radial direction from the end portion 7e that protrudes toward the outer circumferential side of the tool. The portions of these cylindrical portions corresponding to the tip mounting seats 26 are provided with a tapered hole 29 whose diameter gradually decreases toward the center in the tool radial direction, similar to the embodiment shown in FIG. A recess 27 is formed with a female threaded portion 30 coaxial with the tapered hole 29, and an adjustment screw 28 comprising a male threaded portion 35 and a pressing portion 36 with a tapered shaft shape is formed in these recessed portions 27. It is arranged. The angle β formed by the axis ○ of these tapered holes 29 and the like and the axis ○ of the tool body 40 in a cross section perpendicular to the tool axis is set to 900 degrees.

Further, the upper end of the mounting groove 42 extends in the tool proximal direction beyond the upper end of the chip pocket 25, and a part of the recess 27 is opened in the mounting groove 42, so that the periphery of the tapered hole 29 A part of it is cut out.

Even in the face milling cutter 40 configured as described above, when the pressing portion 36 of the adjusting screw 28 presses the wall surface of the tapered hole 29, the periphery of the recessed portion 27 is elastically deformed, and the side surface of each chip 7 is Since the position of the restraining surface 26b that comes into close contact with the insert 7b changes, the distance from the tool mounting surface 40a to the corner cutting edge 7a of each insert 7 can be adjusted by simply adjusting the screwing amount of the adjustment screw 28. In the example, since the recess 27 is formed in a cylindrical shape that is set back from the outer peripheral surface 41a of the tool body 41 or the outer peripheral end 7e of the tip 7, the degree of freedom in designing the recess 27 and the adjustment screw 28 is limited. In addition, when cutting a workpiece having a corner C, the tool main body 40 can be brought closer to the corner C to minimize the width of the uncut portion.

That is, as shown in FIG. 10, the outer circumferential surface 41a of the tool body 41 located closer to the tool base end than the tip 7 is formed into a conical shape whose diameter increases toward the tool base end, similar to the conventional face milling cutter 1. When formed into a planar shape, this tip outer peripheral surface 4
Since the tip 1a inevitably protrudes further toward the tool outer circumferential side than the outer circumferential end 7e of the tip 7, when cutting the workpiece W, the tip 7 protrudes from the corner C of the workpiece W by an amount greater than the protrusion of the outer circumferential surface 41a. A predetermined width of uncut portion will be left on the workpiece W at a distance.

When the recess 27 and the adjusting screw 28 are provided in the tool main body 41 having such a shape, the adjustment range of the above-mentioned distance becomes larger as the recess 27 and the adjusting screw 28 are closer to the restraining surface 26b. It is preferable that the adjustment screw be arranged parallel to the restraining surface 26b from the outer circumferential surface 41b of the tip toward the center of the tool body 41. 28
Depending on the size, etc., the larger diameter side of the tip outer circumferential surface 41b is enlarged, and the width of the uncut portion increases.

In this case, if the diameter of the adjustment screw 28 is made smaller, the uncut width can be reduced, but there is a strong possibility that the adjustment range of the distance by the adjustment screw 28 will be reduced and sufficient adjustment will not be possible.

On the other hand, according to the example shown in FIG. 9, first, the tip outer circumferential surface 41a of the tool body 41 is set back from the outer circumferential end 7e of the tip 7, so that the outer circumferential end 7e of the tip 7 is covered during cutting. It can be brought close to the wall surface of the cutting material W to the extent that it touches the wall surface of the cutting material W, thereby minimizing the uncut width of the corner C.

Even if the size of the adjustment screw 28 changes, the diameter of the outer peripheral surface 41a of the tip end of the tool body 41 will not be affected in the same way, so the shape of the recess 27 and the size of the adjustment screw 28 etc. can be adjusted depending on the distance. It can be freely changed according to the required performance, such as the adjustment range of

In the above embodiment, the corner angle θ is approximately 45°.
As shown in the figure, it goes without saying that the same effect can be achieved even when the present invention is applied to a face milling cutter having a relatively shallow corner angle θ of about 15° to 30°.

Next, with reference to FIGS. 13 to 17, the cutout groove 31 (see FIGS. 3 and 4) formed around the recess 27
An example in which the shape of is changed will be explained.

13 and 14, a plurality of notch grooves 51 are formed in the outer circumference of the tool body 50, penetrating the recess 27 and extending parallel to the restraining surface 26b, and both ends of these notch grooves 51 are connected to the chip pocket 25. It was opened to

According to this example, by screwing in the adjustment screw 28, the circumference of the recess 27 is deformed in the vertical direction with the notch groove 51 as a boundary, so that only a part of the recess 27 is cut, as shown in FIG. 12, for example. The effect is that the range of adjustment by the adjustment screw 28 is expanded compared to the case where the adjustment screw 28 is missing. In this example, both ends of the notch groove 51 are opened to the chip pocket 25, but if the length from both ends of the notch groove 51 to the recess 27 is sufficiently large, the same result can be obtained even if the chip pocket 25 is not opened. can be effective.

Further, FIG. 15 shows a cutout groove 61 formed on the outer circumference of the tool body 60, one end of which opens into the recess 27, and the restraining surface 27.
6b, and a first notched groove 62 that communicates with the other end of this first notched groove 62, extends in a direction perpendicular to the first notched groove 62, and opens at the tip end into the mounting groove 24. It is constructed from a second notched groove 63.

In this example, the part of the outer circumference of the tool body 60 where the recess 27 and the adjustment screw 28 are arranged is the chip pocket 2.
5 and the second notch groove 63 to form a protrusion, elastic deformation around the recess 27 is more likely to occur.
Therefore, the deflection adjustment work can be performed with less force.

FIG. 16 shows a mounting groove 24 and a chip mounting seat 2 on the outer circumference of the tool body 70 when viewed from the side of the tool body 70.
A cutout groove 71 extending in substantially the same direction as the cutout groove 71 is formed, and one end of the cutout groove 71 is opened in the recess 27 and the other end is opened in the mounting groove 24, and the cutout groove 71 is opened closer to the tool body than the open end of the cutout groove 71. 70 in the rotational direction (arrow A'j in the figure)
5fi), a chip restraining surface 26b is formed.

In this example, by tightening the adjustment screw 28, the periphery of the notch groove 71 is pushed out in the left-right direction (in the direction of arrows A and B in the figure) with the notch groove 71 as a boundary, and as a result, the tip 7 is moved against the restraining surface. 26b and is pushed out toward the tool tip side, the runout adjustment work can be performed in the same manner as in each of the above embodiments.

In addition, FIG. 17 shows a cutout groove 7 similar to the example shown in FIG. 16.
1, a chip restraining surface 26b is formed on the rear side in the tool rotation direction (in the direction of arrow B in the figure) from the open end of the notch groove 7], and is further adjacent to the restraining surface 26b as shown in FIG. A second notch groove 72 similar to the example is formed.

This example is similar to the example shown in FIG. 16 in that by tightening the adjustment screw 28, the periphery of the notch groove 71 is expanded in the left and right directions (arrows A and B in the figure). The difference is that the restraining surface 26b is retracted from the side surface 7b of the chip 7.

Therefore, when the tip 7 is to be protruded from the tip of the tool, the adjustment screw 28 is rotated in the direction of loosening it, contrary to the above embodiments, and when the tip 7 is to be moved back toward the base end of the tool, the adjustment screw 28 is tightened. Although it is necessary to rotate the screw in the direction shown in FIG. .

Next, an example in which the recess 27 and the adjustment screw 28 are changed will be described with reference to FIGS. 18 to 20.

FIGS. 18 and 19 show a square hole (hole portion) 82 in which a concave portion 81 formed on the outer periphery of the tool body 80 forms a tapered surface 82a that is approximately parallel to the restraining surface 26b, and
An adjustment screw 83 inserted into the recess 81 is connected to a stud port 84 that is connected to the female thread portion 30, and is screwed with the stud port 84. and the tapered surface 82a of the square hole 82
A wedge member (pressing part) 8 having a tapered surface 85a that is attached to the
5, and is similar to the example shown in FIGS. 15 and 17 above in that a recess 81 and a notch 86 opening into the mounting groove 24 are formed on one end side of the square hole 82. It is.

Here, the stand port 84 is connected to the female threaded portion 30.
and a driven threaded part 84b that threadedly engages with the threaded hole 85b of the wedge member 85. are said to be in opposite directions.

In this example, the male threaded portion 84a of the stud holder 84 is
When the screw is rotated in the tightening direction with respect to the female threaded portion 30, the entire stud bolt 84 moves toward the center in the tool radial direction, and at the same time, the driven threaded portion 84b moves into the tapped hole 8 of the wedge member 85.
5b, that is, the wedge member 85 rotates in the direction in which it comes off toward the tool outer circumferential side, so the wedge member 85 is pulled into the square hole 82, and as a result, the tapered surface 82a of the square hole 82 is rotated. is pressed by the tapered surface 85a of the wedge member 85, and the restraining surface 26b is pushed toward the tool tip side. Conversely, the male threaded portion 84 of the stud bolt 84.
When a is rotated in the loosening direction with respect to the female threaded portion 30, the wedge member 85 is pushed out of the square hole 82, and the restraint surface 26b retreats toward the tool proximal end.

Therefore, in the examples shown in these figures as well, by adjusting the screwing amount of the stud bolt 84 of the adjustment screw 83, the runout adjustment work can be performed in the same manner as in each of the embodiments described above. Moreover,
In this example, the wedge member 85 of the adjustment screw 83 presses the tapered surface 82a of the square hole 82 over its entire surface in a direction substantially perpendicular to the restraining surface 26b. Compared to the case where the inner wall of the hole 29 is pressed, the amount of displacement of the restraint surface 26b is increased.

In addition, in the example shown in FIGS. 18 and 19, the notch groove 86
Although the notch grooves 86 are provided only on one side of the square hole 82, as shown in FIG. 20, the notch grooves 86 may be formed on both sides of the square hole 82.

In each of the above embodiments, the side surface 7b of the chip 7 is
Although the description has been made of a face milling cutter having a structure in which the face milling cutter 1 is in direct contact with the tip, the present invention is not limited thereto. For example, as shown in FIGS. Even if a similar supporter 8 is attached, a chip 7 is attached to this supporter 8, and the end surface 8a of the supporter 8 and the restraint surface 26b are brought into close contact, there is a recess 27 and an adjustment screw behind the restraint surface 26b. 28, and by moving the tip 7 together with the supporter 8 in the tool axis direction, the runout adjustment work can be performed. In this case, it is not necessary to adjust the width S of the supporter 8, so it goes without saying that one type of supporter 8 to be prepared is sufficient.

Further, in each of the above embodiments, the present invention is applied to a face milling cutter, but the present invention is not limited to this, and can be applied to various other types of indexable cutters.

For example, FIGS. 24 to 26 show an example in which the present invention is applied to a sight cutter. In this example, a mounting groove 24 and a tip mounting seat 26 are formed on the outer circumference of a disc-shaped tool body 90. are formed, the above-mentioned recesses 27 and adjustment screws 28 are arranged behind the restraining surfaces 26b of these chip mounting seats 26, and the chips 7 are mounted on each of the chip mounting seats 26 in a staggered manner. be.

According to this example, by adjusting the screwing amount of the adjustment screw 28, the protrusion amount δ of the tip 7 from both side surfaces 90a, 90b of the tool body 90 can be adjusted, so that the cutting width E of the sight cutter can be adjusted to a desired value. It is possible to accurately match the value of .

In addition, for example, as shown in FIGS. 26 to 28, there are mounting grooves 2 on the outer periphery of the tip of the approximately cylindrical tool body 100.
Also in an end mill configured to attach a plurality of tips 7 to the supporter 8 via the supporter 8, the above-mentioned recess 27 and adjustment are provided on the tool proximal end side of the restraining surface 26b of the tip mounting seat 26 that comes into contact with the end surface 8a of the supporter 8. By providing the screw 28, the amount of protrusion δ of the tip 7 from the tool tip 100a can be adjusted. Note that in this example, the supporter 8 is attached to the tool body 100 by the bolt I○2 inserted into the bolt hole 101 of the supporter 8, so in order to adjust the protrusion amount δ without replacing the supporter 8, the bolt Although the hole 101 is formed to have a slightly larger diameter than the bolt 102, it is necessary to take care to enable the position of the supporter 8 to be changed by, for example, forming the hole 101 into an elongated hole extending in the tool axis direction.

In addition, in each of the embodiments explained in FIGS. 1 to 28,
An adjustment screw 2 is used as a pressing means to spread out the recess 27.82.
8.83 is used, but the present invention is not limited to this. For example, the restraint surface 26b may be sealed by sealing hydraulic oil inside the recess 27 or the like and increasing or decreasing the pressure of this hydraulic oil.
Shake adjustment can be performed by changing the position of , and various other suppressing means may be used.

[Effects of the Invention] As explained above, according to the present invention, tip deflection adjustment work can be performed by changing the position of the restraining surface by pushing out the recessed portion with the suppressing means, so that it is possible to adjust the tip deflection as required by the conventional method. There is no need to perform complicated operations such as replacing parts for deflection adjustment, and therefore the tip deflection adjustment operation can be performed easily and quickly, greatly improving work efficiency.

In addition, since there is no need to separately provide parts for runout adjustment, the time and effort required for tool maintenance is greatly reduced.
The cost required for parts management can also be significantly reduced.

If a notched groove opening in the recess is provided, the recess can be easily pushed out, thereby expanding the adjustment range during runout adjustment work.

Furthermore, while the recess is composed of a hole and a female thread,
When the pressing means is composed of a pressing part and a male threaded part, and at least one of the hole part and the pressing part is formed into a tapered surface, by changing the amount of screwing of the male threaded part into the female threaded part, Since the force with which the pressing part presses the inner wall of the hole can be changed, the above-mentioned runout adjustment work can be performed more easily. If the outer circumferential part of the tool where these holes, pressing parts, etc. are formed is formed into a cylindrical surface that recedes toward the center of the tool than the outer circumferential edge of the chip, the outer circumferential part of the tool is expanded toward the outer circumferential side of the tool. Since the size of the male thread part and the pressing part can be set freely, the degree of freedom in designing the concave part and the suppressing means is improved. Interference with the tool body can be prevented and the uncut width can be kept to a minimum.

[Brief explanation of the drawing]

1 to 5 show an embodiment in which the present invention is applied to a face milling cutter. FIG. 1 is an axial cross-sectional view of the face milling cutter, and FIG. 2 is a view taken from one direction in FIG. 1. , Figure 3 is a view taken from the direction ■ in Figure 1, Figure 4 is a diagram showing the shape of the outer periphery of the tip of the tool body with the parts attached to them removed, Figure 5 is the adjustment screw. Figures 6 to 10 are diagrams showing other embodiments of the present invention, and Figure 6 is an axial cross-sectional view of a face milling cutter. The figure is number 6
FIG. 8 is a view taken from the direction ■ in FIG. 11 is a sectional view showing an example in which the present invention is applied as is to a conventional face milling cutter, and FIGS. 11 and 12 are views showing modified examples of the embodiment shown in FIGS. 6 to 9. The figure is an axial cross-sectional view of the face milling cutter, FIG. 12 is a view taken from the direction of ■ in FIG. 11, and FIGS. 14 is a cross-sectional view taken along the line ■-■ in FIG. 13, and FIG. 15 is a diagram showing the outer periphery of the tool body in an example in which notched grooves extending in the circumferential direction of the tool are formed. FIG. 16 is a diagram showing the tool outer periphery in an example in which the extending direction of the notch groove is changed. FIG. 17 is a tool outer periphery in an example in which FIG. 16 is further modified. Figure showing the part, 1st
8 and 19 are diagrams showing examples in which the pressing means is changed,
FIG. 18 is a diagram showing the outer periphery of the tool, FIG. 19 is a sectional view taken along the line ■-■ in FIG. 18, and FIG. 20 is a diagram showing the outer periphery of the tool in a further modified example of the example shown in FIG. FIGS. 21 to 23 are diagrams showing an example in which the present invention is applied to a face milling cutter that uses a supporter to attach a chip,
Fig. 21 is an axial cross-sectional view of the face milling cutter, Fig. 22 is a view taken from the direction of ■ in Fig. 21, and Fig. 23 is a cross-sectional view of the face milling cutter in the axial direction.
24 and 25 are views showing an example in which the present invention is applied to a side cutter, and FIG. 24 is a view showing the side cutter in an expanded state, and FIG. 25 is a side view, FIGS. 26 to 28 are views showing an example in which the present invention is applied to an end mill, FIG. 26 is a side view, and FIG.
FIG. 28 is a view taken from the X direction in FIG. 26, FIGS. 29 and 30 are views showing an example of a conventional face milling cutter, and FIG. 30 is a bottom view. 7...Throwaway tip, 21.41.50.
60, 70, 80, 90, 100...tool body, 24
...Mounting groove, 26b...Restriction surface, 27/81
・Concavity, 28・83...Adjustable suppression means), 29...Tapered hole (hole), 30...
・Female thread part, 31 ・51 ・61 ・71 ・72 ・86
...Notch groove, 35...Male thread part, 36...
... Pressing part, 82 ... Square hole (hole part), 84a.
...Male thread part, 85...Wedge member (pressing part).

Claims (4)

[Claims] (1) A mounting groove is formed on the outer circumference of the tool body that is rotated around the axis, and a mounting groove that opens at one end and the outer circumference of the tool body is formed, and a throw-away tip is removably mounted in this mounting groove. In the away type cutter, a restraining surface is formed in the mounting groove of the tool body to face a side surface of the throwaway tip facing the other end of the tool body and to restrain movement of the throwaway tip in the tool axis direction. , forming a recess that recesses toward the center of the tool main body in the outer peripheral part of the tool main body located on the other end side of the tool main body with respect to the restraining surface, and pressing the inner wall of the recess into the recess. A throw-away type cutter characterized by being provided with a pressing means for pushing out a recessed part. (2) The throw-away type cutter according to claim 1, wherein a cutout groove opening into the recess is formed on the outer circumference of the tool body. (3) The recess is composed of a hole opening in the outer periphery of the tool body and a female threaded portion located closer to the center in the tool radial direction than the hole, and the pressing means is configured to open the hole in the hole. It is composed of a pressing part that comes into contact with the inner wall, and a male threaded part that is threadedly engaged with the female threaded part to move the pressing part in the axial direction of the hole, and the inner wall of these holes and the periphery of the pressing part are connected to each other. 3. The throw-away type cutter according to claim 1, wherein at least one of the surfaces is formed into a tapered surface shape. (4) The outer periphery of the tool body in which the recess is formed,
4. The throw-away type cutter according to claim 3, wherein the throw-away tip has a cylindrical surface shape that recedes toward the center in the radial direction of the tool from an end on the outer peripheral side of the tool.