JP3097101B2 - Slowway type ivy - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[Industrial applications]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a throw-away type cutter in which a plurality of cutting blade tips are detachably mounted on an outer peripheral portion of a tool body, such as a face mill, a side cutter or an end mill.

[0002]

[Prior art]

Conventionally, as a throwaway type cutter of this type, for example, a throwaway type face milling machine shown in FIGS. 29 and 30 is known. In the face milling machine 1 shown in these figures, a plurality of mounting grooves 5 opening on the tip end surface 3 and the outer peripheral surface 4 of the tool main body 2 are formed on the outer peripheral portion of the tool main body 2 at an equal pitch along the circumferential direction of the tool. A chip mounting seat 6 is formed on one of the wall surfaces in the mounting groove 5, and the chip mounting seat 6 is made of a superalloy throw-away chip (hereinafter, abbreviated as a chip) having a substantially square flat plate shape. 7 is seated via a supporter 8, and the chip 7 and the supporter 8 are detachably mounted by being pressed by a wedge member 9 a and a supporter fixing wedge 9 b mounted in the mounting groove 5. Here, in a cutting tool such as a face mill using a plurality of chips 7 as described above, a machine spindle (not shown) is used.
Corner cutting edge of each chip 7 from the mounting surface 2a which is in close contact with the end face of
Matching the distance L to 7a is indispensable for maintaining the machining accuracy. However, since there is actually a machining error in the chip mounting seat 6, the chip 7, etc., the same chip 7 is simply used. The above-mentioned distance L varies considerably only when it is mounted on the chip mounting seat 6.

Therefore, in such a case, an operation of adjusting the distance L when mounting each chip 7 (hereinafter, referred to as a shake adjustment operation).
It is necessary to perform, for example, in the above-mentioned face mill 1,
A recess 10 is formed in the supporter 8, and a wall 10 a of the recess 10 is brought into contact with a side surface 7 b of the chip 7 so that the tool axis O of the
Direction, and the wall 10 of the recess 10
By adjusting the distance S from a to the end face 8a of the supporter 8, the distance L is made to match. That is, when the chip 7 is mounted on the above-mentioned face mill, first, a plurality of supporters 8 having different distances S are prepared. The change range of the distance S is usually set to about 6 μm to 8 μm. Next, the supporters 8 having the same distance S are selected from the supporters 8 having the different dimensions, and the respective chips 7 are mounted in the respective recesses 10. Subsequently, each of the supporters 8 is attached to the chip mounting seat 6. Is inserted into the chip mounting seat 6 so as to be in close contact with the end face 6a of the chip. Then, the clamp screws 11 and 12 inserted into the respective wedge members 9a and 9b are lightly
Then, the supporter 8 is slightly pressed down, and in this state, the supporter 8 corresponding to each chip 7 is appropriately replaced with one of the chips 7 as a reference (hereinafter, the reference chip 7 is referred to as a reference chip 7m). By doing so, the distance L of each chip 7 is made to match. That is, the chip 7 whose distance L is smaller than the reference chip 7m is replaced with the supporter 8 whose distance S is larger,
Conversely, with respect to the chip 7 having the large distance L, the supporter 8 is replaced with the supporter 8 having the small distance S, and the distance L is measured again by mounting the chip 7 on the chip mounting seat 6 again. And the distance L of each chip 7
The above procedure is repeated for each chip 7 until the distance is equal to the distance L of the reference chip 7m. After that, each chip 7 and the supporter 8 are firmly pressed by the wedge members 9a and 9b, thereby adjusting the runout of each chip 7. Is completed.

[0004]

[Problems to be solved by the invention]

However, when performing the runout adjustment work in the above procedure,
Since it is necessary to frequently attach and detach the supporter 8 for each chip 7, it takes a lot of time to complete the mounting of all the chips 7, and the work efficiency such as setup change is remarkably deteriorated. was there. In addition, since a large number of supporters 8 having different dimensions must be prepared, the number of parts is increased, and as a result, maintenance of parts is troublesome, and the cost of parts management is increased. Was. The present invention has been made under such a background,
It is an object of the present invention to provide a throw-away type cutter capable of facilitating the operation of adjusting the run-out of the tip and greatly improving the operation efficiency.

[0005]

[Means for Solving the Problems]

In order to solve the above-mentioned problems, a throw-away type cutter according to the present invention has a mounting groove formed on an outer peripheral portion of a tool main body, the mounting groove being opened at a tip end and an outer circumference of the tool main body. Mounted by
In a throw-away type cutter in which the front cutting edge of the throw-away tip protrudes from the tip surface of the tool body,
A concave portion which is depressed toward the center of the tool body is formed on an outer peripheral portion of the tool body on a base end side close to the mounting groove, and a concave portion and a cutout groove which is open to the mounting groove are formed on the outer peripheral portion of the tool body. Between the side surface of the indexable insert facing the cutting edge and facing the base end side of the tool body and the concave portion, a constraining surface abutting on the side surface, and the side surface is partitioned by the concave portion, the notch groove, and the constraining surface; Form a displacement part that can be displaced in the direction crossing the
An adjusting screw provided with a tapered pressing portion for pressing the inner wall of the concave portion to displace the displacing portion is screwed, and the displacing portion is elastically displaced in the direction of the side surface by the pressing portion of the adjusting screw to form the throw-away tip. It is characterized in that it can be slightly moved to the tip side in the axial direction with respect to the clamp member, and the amount of protrusion of the front cutting edge of the throw-away tip can be adjusted. Further, various configurations may be used as the concave portion and the pressing means. For example, the concave portion may be a hole that opens in the outer peripheral portion of the tool body, and may be positioned closer to the center of the tool radial direction than the hole. And a male screw for screwing the pressing means into contact with the inner wall of the hole, and for screwing the female screw to move the pressing portion in the axial direction of the hole. It is preferable that at least one of the inner wall of the hole and the peripheral surface of the pressing portion is formed in a tapered shape. When the concave portion and the pressing means are configured as described above, the outer peripheral portion of the tool main body in which the concave portion is formed is located closer to the tool radial direction center than the outer peripheral end of the throw-away tip. Preferably, it is formed in a receding cylindrical surface shape.

[0006]

[Action]

According to the configuration described above, the displacement portion around the concave portion is elastically deformed by pushing and expanding the concave portion, and the position of the restraining surface of the mounting groove changes with this deformation. For this reason, by adjusting the amount by which the recess is pushed by the pressing means, the position of the chip in the tool axis direction can be changed, whereby the distance from the tool mounting surface to each chip can be adjusted. Further, as described above, while the concave portion is constituted by the hole portion and the internal thread portion, the pressing means is constituted by the pressing portion and the external thread portion, and at least one of the hole portion and the pressing portion has a tapered surface. The above-mentioned work of adjusting the run-out is facilitated by increasing or decreasing the amount of screwing of the male thread into the female thread, thereby changing the force with which the pressing part presses the inner wall of the hole and changing the amount of elastic deformation of the recess. Can be done. When the concave portion and the pressing means are configured as described above, the outer peripheral portion of the tool main body provided with the concave portion and the pressing means is formed into a cylindrical surface retreating toward the center in the tool radial direction from the outer peripheral end of the tip. By doing so, the screw diameter of the male screw portion or the female screw portion, or the diameter of the pressing portion or the hole portion can be freely set without projecting the tool outer peripheral portion in the radial direction.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, an embodiment in which the present invention is applied to a face milling machine will be described with reference to FIGS. In addition, the above-mentioned figure
The same components as those of the conventional example shown in FIG. 29 and FIG. 30 are denoted by the same reference numerals, and description thereof will be simplified. As shown in FIG. 1 and FIG.
Reference numeral 20 denotes a plurality of mounting grooves 24 (only one mounting groove is shown in the figure) opened on the distal end surface 22 and the outer peripheral surface 23 of the tool main body 21 on the distal end outer peripheral portion of the tool main body 21, and a tip pocket 25. Formed at equal pitches along the tool circumferential direction, a chip mounting seat 26 is formed on a wall portion of the mounting groove 24 that intersects with the chip pocket 25, and the chip mounting seat 26 is formed of a substantially square plate-shaped carbide. An alloy chip 7 is mounted, and the chip 7 is tightened by a wedge member 9 a mounted in the mounting groove 24 with the clamp screw 12. Here, as shown in FIGS. 1 to 4, the tip mounting seat 26 includes a bottom surface 26a that is in close contact with the upper surface 7c of the chip 7, a restraining surface 26b that faces the tool tip side, and a wall surface 26c that faces the tool outer peripheral side.
And the constraint surface 26b and the wall surface 26c.
Are the side faces facing the base end side in the tool axis direction of the insert 7, respectively.
The corner cutting edge 7a is positioned in the tool axis O direction and in the radial direction in close contact with 7b and a side surface 7d facing the center side in the tool radial direction.

A recess 27 is formed on the outer periphery of the tool body 21 located closer to the tool base end than the restraining surface 26b of the tip mounting seat 26, and is recessed toward the center in the tool radial direction. An adjustment screw (pressing means) 28 for pushing and expanding the concave portion 27 is provided inside. These recesses 27 and adjustment screws 28 are provided for adjusting the distance L from the mounting surface 21a of the tool body 21 to the corner cutting edge 7a of the chip 7, and the details thereof will be described below. That is, the concave portion 27 has a tapered hole (hole portion) 29 whose diameter gradually decreases from the outer peripheral surface 23 of the tool main body 21 toward the center in the tool radial direction, and is formed on the small-diameter end side of the tapered hole 29 so as to form the tapered hole. It comprises a hole 29 and a coaxial female thread portion 30. Part of the peripheral edge of the tapered hole 29 is a tip pocket.
It is formed to reach 25 and its mouth is notched. One end of the tapered hole 29 is tapered.
A notch groove 31 that opens to 29 and the other end opens to the mounting groove 24,
The chip mounting seat 26 is formed on the restraining surface so as to be substantially parallel to 26b. Further, the tip mounting seat 26
An escape portion is provided at one end of the restraining surface 26b to avoid interference with the ridge of the chip 7 mounted on the chip mounting seat 26.
The cutout groove 31 and the escape portion 32 allow the tapered hole 29 to be formed from the restraining surface 26b of the tip mounting seat 26.
A convex wall portion 33 is formed in a portion extending to the bottom of the mounting groove 24 so as to project from the bottom surface of the mounting groove 24. A groove 34 that opens to the mounting groove 24 is formed behind the recess 29.

On the other hand, the adjusting screw 28 is composed of a male screw part 35 screwed with the female screw part 30 of the concave part 27 and a pressing part 36 coaxial with the male screw part 35. Further, the peripheral surface of the pressing portion 36 is formed in a tapered surface shape whose diameter gradually decreases as approaching the male screw portion 35, and the taper angle is defined by the concave portion.
It is the same as or slightly larger than the 27 tapered holes 29. In the face mill 20 configured as described above, when the chip 7 is mounted on the chip mounting seat 26 of the tool body 20, the distance L is adjusted by operating the adjustment screw 28.
Can be adjusted individually. Hereinafter, the procedure will be described in detail. That is, in the face milling machine 20 of the present embodiment, first, the adjusting screw 28 is inserted into each concave portion 27 of the tool main body 21, and each male screw portion 35 is screwed into the female screw portion 30 of the concave portion 27 to form the pressing portion 36. The peripheral surface and the inner wall of the tapered hole 29 are brought into close contact with an appropriate strength.

Next, each chip 7 is inserted into the chip mounting seat 26 such that each side surface 7b is in close contact with the restraining surface 26b of each chip mounting seat 26, and then the clamp screw 12 inserted through the wedge member 9a is inserted. By loosely tightening each tip 7 with the wedge member 9a.
And the bottom surface 26a of the tip mounting seat 26. After completing the above procedure, move the tool body 21
21a is placed on the surface plate so that it faces downward, and then the distance L between the chips 7 is measured using a measuring means such as a dial gauge.
Measure the difference between Then, the tip 7 having the largest distance L, in other words, the tip 7 projecting most from the tool tip is set as the reference tip 7m, and each adjustment screw 28 is tightened.
Is matched with the distance L of the reference chip 7m. That is, when the adjustment screw 28 is tightened,
36 presses the inner wall of the tapered hole 29 to expand the taper 29, so that the convex wall portion 33 formed between the tapered hole 29 and the constraint surface 26b is elastically deformed toward the tool tip side, and Accordingly, the constraint surface 26b of the tip mounting seat 26 is displaced toward the tool tip, and each tip 7 is pushed out toward the tool tip, and the distance L increases. Therefore, by adjusting the amount of tightening of each adjusting screw 28 according to the difference from the distance L of the reference chip 7m, the distance L of each chip 7 can be made to coincide with the reference chip 7m.

If the tip 7 to be adjusted projects beyond the distance L of the reference tip 7m toward the tool tip, the corresponding adjusting screw 28 is loosened and the pressing portion 36 of the adjusting screw 28 removes the inner wall of the tapered hole 29. What is necessary is just to reduce the pressing force. That is, by loosening the adjusting screw 28, the convex wall portion 33 is retracted to the tool base end side, and the restraining surface 26b is displaced to the tool base end side.
The distance L can be reduced by pushing the tip 77 toward the base end of the tool until the side surface 7b is in close contact with the constraint surface 26b. After adjusting the distance L of each chip 7 by operating the adjusting screw 28 as described above, the wedge member 9a for holding down each chip 7
By firmly tightening the clamp screw 12 of each chip 7, each chip 7 is firmly tightened.
Is mounted on the tool body 21 with the distances L coincident with each other.

Here, regarding the adjustment range of the distance L by the adjusting screw 28, the screw diameter of the external thread 35 of the adjusting screw 28, the width t of the convex wall portion 33 (see FIG. 4), or the inner diameter of the tapered hole 29 By changing the shape of the periphery of the tip mounting seat 26, such as the taper angle, it can be changed as appropriate. By the way, in this embodiment,
When the taper angle of the pressing portion 36 of the adjusting screw 28 was set at 10 °, the width t of the convex wall portion 33 was set at 2 mm, and the screw diameters of the female screw portion 30 and the male screw portion 35 were set at 5 mm, as shown in FIG. It was confirmed that when the screwing amount (H) of the adjusting screw 28 in the axial direction was changed by about 0.6 mm, the distance L could be changed and the distance L could be adjusted in units of about 0.01 mm. As described above, in the face milling machine 20 of the present embodiment, by changing the tightening amount of the adjusting screw 28,
Since the distance L of each chip 7 from the tool mounting surface 21a can be increased or decreased by changing the position of the constraint surface 26b for positioning the chip 7 in the tool axis direction, the run-out adjustment of the chip 7 can be easily performed. As a result, the time required for the chip mounting operation can be reduced, and the operation efficiency can be greatly improved.

[0013] Furthermore, since it is not necessary to prepare a large number of support components such as supporters having different dimensions in performing the shake adjustment work as in the related art, the time and effort required for the maintenance management of the components can be omitted, and the maintenance management is required. Costs can also be significantly reduced. Further, in the present embodiment, in particular, a part of the peripheral edge of the tapered hole 29 is opened in the tip pocket 25 and the tool body 21
Since the cutout groove 31 that opens to the concave portion 27 is formed in the outer peripheral portion of the tapered hole 30, the opening of the tapered hole 30 is cut out, so that the amount of elastic deformation of the restraint surface 26b increases particularly when the adjusting screw 28 is tightened. To play. However, the recess 27
It is not always necessary to cut out the notch groove 31 by, for example, setting the screw diameter of the adjusting screw 28 to be sufficiently large, or setting the width t from the inner wall of the tapered hole 30 to the constraint surface 26b to be smaller. If the constraint surface 26b can be sufficiently displaced, it may be omitted. The configuration shown in the above embodiment is merely an example of the present invention, and the present invention is not limited to this, and various other configurations can be considered. Hereinafter, a plurality of other embodiments will be described with reference to FIGS. In the following description, the same components as those in the above-described embodiment or the conventional example are denoted by the same reference numerals, and the description thereof will be omitted.

In the embodiment shown in FIGS. 6 to 9, the present invention is applied to a face mill in which a predetermined corner angle θ is given to the chip 7, similarly to the conventional example shown in FIGS. 29 and 30 described above. It is an example. That is, the face mill 40 shown in FIGS.
A plurality of mounting grooves 42 are formed on the outer periphery of the tip of the tool body 41,
A flat sheet 43 is mounted on the chip mounting seat 26 formed in the mounting groove 42 in a state where a predetermined corner angle θ (45 ° in the illustrated example) is provided.
42, the wedge member 9a
It is sandwiched between 9a and the sheet 43. Here, the outer peripheral surface 41a of the tool main body 41 is formed in a cylindrical surface that retreats toward the center in the tool radial direction with respect to the end 7e of the tip 7 protruding toward the outer peripheral side of the tool. In a portion corresponding to the tip mounting seat 26 of these cylindrical portions, similarly to the embodiment shown in FIG. 1 and the like, a tapered hole 29 whose diameter gradually decreases toward the center in the tool radial direction, A concave portion 27 composed of a hole 29 and a coaxial female thread portion 30 is formed, and an adjusting screw 28 composed of a male thread portion 35 and a tapered shaft-shaped pressing portion 36 is provided in these concave portions 27. Have been. Note that the axis O ₁ of these tapered holes 29 and the like and the axis O
Is set at approximately 90 ° in the section perpendicular to the tool axis.

The upper end of the mounting groove 42 extends in the tool base end direction beyond the upper end of the tip pocket 25, and a part of the concave portion 27 is opened in the mounting groove 42, whereby the taper is increased. A part of the periphery of the hole 29 is cut out. Thus, also in the face milling machine 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 concave portion 27 is elastically deformed, and the side surface 7b of each chip 7 is deformed. Since the position of the restraining surface 26b in close contact with the surface changes, the distance L from the tool mounting surface 40a to the corner cutting edge 7a of each chip 7 can be adjusted only by adjusting the screwing amount of the adjusting screw 28.
In addition, in this embodiment, the outer peripheral surface 41a of the tool body 41 in which the concave portion 27 is formed is formed in the shape of a cylindrical surface receding from the outer peripheral end portion 7e of the chip 7, so that the concave portion 27 and the adjusting screw can be adjusted. 28
In addition, when cutting a workpiece having a corner C, the tool body 40 can be brought closer to the corner C to minimize the width D of the uncut portion.

That is, as shown in FIG. 10, the outer peripheral surface 41 a of the tool main body 41 located closer to the tool base end than the insert 7 is increased in diameter toward the tool base end like the conventional face milling machine 1. When formed into a conical surface, the tip outer peripheral portion 41a necessarily projects to the tool outer peripheral side from the outer peripheral end portion 7e of the tip 7, so that when the workpiece W is cut, the tip 7 is An uncut portion having a predetermined width D is formed on the work material W by separating from the corner portion C of the work material W more than the protrusion amount of 41a. When the concave portion 27 and the adjusting screw 28 are provided in the tool body 41 having such a shape, the adjustment range of the distance L becomes larger as they are closer to the constraint surface 26b.
As shown by the dotted line, the tool body 41
It is preferable to arrange in such a manner as to be parallel to the above-mentioned restraining surface 26b toward the center side of the front end.In such a configuration, as shown by a two-dot chain line in FIG. And the width D of the uncut portion increases. In this case, if the diameter or the like of the adjusting screw 28 is reduced, the uncut width D can be reduced. However, there is a large possibility that the adjustment range of the distance L by the adjusting screw 28 becomes small and sufficient adjustment cannot be performed.

On the other hand, according to the example shown in FIG.
Since the outer peripheral surface 41a of the tip 41 is retracted from the outer peripheral end 7e of the chip 7, the outer peripheral end 7e of the chip 7 is
, So that the uncut width D of the corner C can be minimized. And even if the size of the adjustment screw 28 changes, the tool body
Since there is no effect on the diameter of the outer peripheral surface 41a of the distal end of 41, the shape of the concave portion 27 and the size of the adjusting screw 28 can be freely changed according to the required performance such as the adjustment range of the distance L, The degree of freedom in design is greatly improved. In the above embodiment, particularly, an example in which the corner angle θ is approximately 45 ° has been described.For example, as shown in FIGS. 11 and 12, the corner angle θ is a relatively shallow angle of about 15 ° to 30 °. It is needless to say that a similar effect can be achieved even when the method is suitable for a face mill.

Next, an example in which the shape of the cutout groove 31 (see FIGS. 3 and 4) formed around the recess 27 will be described with reference to FIGS. 13 to 17. FIGS. 13 and 14 show that a plurality of cutout grooves 51 are formed in the outer peripheral portion of the tool body 50 so as to penetrate the recess 27 and extend in parallel with the restraining surface 26b, and both ends of these cutout grooves 51 are opened in the chip pocket 25. It was made. According to this example, when the adjusting screw 28 is screwed in, the periphery of the concave portion 27 is deformed in the vertical direction with the cutout groove 51 as a boundary. For example, as shown in FIG. 12, only a part of the concave portion 27 is cut out. An effect that the adjustment range by the adjustment screw 28 is expanded as compared with the case is obtained. In this example, both ends of the notch groove 51 are opened in the chip pocket 25 in particular.
If the length from both ends to the recess 27 is sufficiently large, the same effect can be exerted without having to open the chip pocket 25. FIG. 15 shows a notch groove 61 formed on the outer peripheral portion of the tool main body 60, a first notch groove 62 having one end opened to the concave portion and extending parallel to the restraining surface 26b, and a first notch groove. A second notch groove 63 that communicates with the other end of the second groove 62 and extends in a direction perpendicular to the first notch groove 62 and has a front end opening in the mounting groove 24 is formed. In this example, the portion of the outer peripheral portion of the tool main body 60 where the concave portion 27 and the adjusting screw 28 are arranged is formed in a projecting shape by being sandwiched between the chip pocket 25 and the second cutout groove 63.
Elastic deformation around the periphery 27 is more likely to occur, so that the runout adjustment operation can be performed with a smaller force.

FIG. 16 shows the tool main body 70 on the outer periphery thereof.
A cutout groove 71 extending in substantially the same direction as the mounting groove 24 and the chip mounting seat 26 is formed in a side view of 70, and one end of the cutout groove 71 is opened in the concave portion 27 and the other end is opened in the mounting groove 24, respectively. The chip restraining surface 26b is formed on the front side in the rotation direction of the tool body 70 (in the direction of arrow A in the figure) from the open end of the notch groove 71. In this example, by tightening the adjusting screw 28, the periphery of the notch groove 71 is expanded in the left and right directions (arrows A and B directions in the drawing) with the notch groove 71 as a boundary, and the chip 7 is restrained accordingly. Since it is pressed by the surface 26b and pushed out to the tool tip side, the run-out adjustment work can be performed in the same manner as in each of the above embodiments.

FIG. 17 shows a front milling cutter having a notch groove 71 similar to the example shown in FIG. 16, and a chip restraining surface located rearward of the opening end of the notch groove 71 in the tool rotation direction (the direction of arrow B in the drawing). 26b
And a second cutout groove 72 similar to the example shown in FIG. 15 is formed adjacent to the constraint surface 26b. In this example, by tightening the adjustment screw 28,
16 is similar to the example shown in FIG. 16 in that the periphery of the notch groove 71 is pushed out in the left and right directions (arrows A and B in the figure), but the restraining surface 26b retreats from the side surface 7b of the chip 7 with this deformation. Differs in that Therefore, when projecting the tip 7 from the tool tip,
Contrary to the above embodiments, when the adjusting screw 28 is rotated in the loosening direction and the tip 7 is retracted to the tool base end side, it is necessary to rotate the adjusting screw 28 in the tightening direction. Also, in the point that the run-out adjustment operation can be performed by changing the amount of transfer of the adjustment screw 28, the same effect as in the above-described embodiments can be obtained.

Next, an example in which the concave portion 27 and the adjusting screw 28 are changed will be described with reference to FIGS. FIGS. 18 and 19 show that a concave portion 81 formed in the outer peripheral portion of the tool main body 80 has a square hole (hole portion) 82 having a tapered surface 82a substantially parallel to the restraining surface 26b, and is connected to the square hole 82. And an adjusting screw 83 inserted into the recess 81, a stud bolt 84 screwed with the female screw portion 30, and a stud bolt 84 And a wedge member (pressing portion) 85 having a tapered surface 85a in close contact with the tapered surface 82a, and a notch groove 86 opening in the concave portion 81 and the mounting groove 24 is formed on one end side of the square hole 82. This point is the same as the example shown in FIGS. 15 and 17 described above. Here, the stud bolt 84 has a male screw part 84a screwed with the female screw part 30, and a driven screw part 84b screwed with a screw hole 85b of the wedge member 85. The torsion directions of the male screw portion 84a and the driven screw portion 84b are opposite to each other.

In this example, the stud bolt 84 has an external thread 84 a
Is rotated in the tightening direction with respect to the female thread part 30,
At the same time when the entire stud bolt 84 moves toward the center in the tool radial direction, the driven screw portion 84b rotates in a direction in which the driven screw portion 84b becomes loose with respect to the screw hole 85b of the wedge member 85; Therefore, the wedge member 85 is drawn into the inside of the square hole 82, and accordingly, the tapered surface 82a of the square hole 82 is
The constraining surface 26b is pushed to the tool tip side by being pressed by the fifth taper surface 85a. Conversely, stud bolt 84
When the male screw portion 84a is rotated in the loosening direction with respect to the female screw portion 30, the wedge member 85 is pushed out of the square hole 82,
The restraining surface 26b retreats toward the tool base end. Therefore, also in the examples shown in these figures, the run-out adjustment work can be performed in the same manner as in the above-described embodiments by adjusting the screwing amount of the stud bolt 84 of the adjustment screw 83. Moreover, in this example, the wedge member 85 of the adjusting screw 83 is
Since 82a is pressed over the entire surface in a direction substantially orthogonal to the restraining surface 26b, the displacement amount of the restraining surface 26b is smaller than when pressing the inner wall of the circular tapered hole 29 as in each of the above-described embodiments. Increase. In the example shown in FIGS. 18 and 19, the notched groove 86 is
However, notches 86 may be formed on both sides of the square hole 82 as shown in FIG.

In each of the above embodiments, the side surface 7b of the chip 7 is
Although the description has been given of the face mill having a configuration in which the face mill is directly adhered to the chip, the present invention is not limited to this. For example, as shown in FIGS. Even when the supporter 8 is mounted and the chip 7 is mounted on the supporter 8 and the end face 8a of the supporter 8 is closely attached to the restraining surface 26b, the recess 27 and the adjusting screw 28 are arranged behind the restraining surface 26b. By setting the tip 7 and moving the tip 7 together with the supporter 8 in the tool axis direction, a run-out adjustment operation can be performed. In addition,
In this case, since the width S of the supporter 8 does not need to be adjusted, it is needless to say that only one type of the supporter 8 needs to be prepared.

In each of the above embodiments, an example in which the present invention is applied to a face mill is described. However, the present invention is not limited to this, and can be applied to various other throw-away cutters. For example, FIGS. 24 to 26 show an example in which the present invention is applied to a side cutter. In this example, a mounting groove 24 and a chip mounting seat 26 are formed on an outer peripheral portion of a disk-shaped tool body 90. The recesses 27 and the adjusting screws 28 described above are disposed behind the constraint surfaces 26b of the chip mounting seats 26, and the chips 7 are mounted on the respective chip mounting seats 26 in a staggered manner. . According to this example, by adjusting the screwing amount of the adjusting screw 28, the chip 7 from the both side surfaces 90a and 90b of the tool body 90 is adjusted.
Can be adjusted, so that the cutting width E of the side cutter can be accurately matched with a desired value. In addition, as shown in FIGS. 26 to 28, for example, as shown in FIG. 26 to FIG. 28, in an end mill having a configuration in which a plurality of chips 7 are mounted via a supporter 8 in a mounting groove 24 on the outer peripheral end of a substantially cylindrical tool body 100, The above-described recess 2 is located closer to the tool base end than the restraining surface 26b of the tip mounting seat 26 that contacts the end surface 8a of the supporter 8.
By providing the adjusting screw 7 and the adjusting screw 28, the protrusion amount δ of the tip 7 from the tool tip 100a can be adjusted. In this example, since the supporter 8 is mounted on the tool body 100 by the bolts 102 inserted into the bolt holes 101, the bolt holes 101 are required to adjust the protrusion amount δ without replacing the supporters 8. It is necessary to consider that the position of the supporter 8 can be changed, for example, by forming the diameter of the supporter 8 slightly larger than the diameter of the bolt 102 or by forming the supporter 8 in an elongated hole shape extending in the tool axis direction.

In each of the embodiments described with reference to FIGS.
Although the adjusting screws 28 and 83 were used as the pressing means for expanding the 27 and 82, the present invention is not limited to this.
27, etc., the hydraulic fluid is sealed, and the pressure of the hydraulic fluid is increased / decreased to change the position of the restraining surface 26b so that the run-out can be adjusted. good.

[0026]

【The invention's effect】

As described above, according to the present invention, the displacement of the outer peripheral portion can be elastically deformed by pushing and expanding the concave portion by the pressing means, thereby changing the position of the restraining surface to precisely perform the tip deflection adjusting operation. Since there is no need to perform any complicated work such as replacing parts for run-out adjustment as in the past, it is possible to easily and quickly perform the run-out adjustment work for the chip and greatly improve the work efficiency. it can. Further, since there is no need to separately provide a component for adjusting the run-out, the time and labor for maintenance of the tool can be greatly reduced, and therefore, the cost required for component management can be significantly reduced. In addition, the provision of the notch groove opening in the concave portion and the mounting groove facilitates the elastic deformation of the displacement portion, so that the adjustment range at the time of the runout adjustment operation is expanded. Further, when the concave portion is constituted by the hole portion and the female screw portion, the pressing means is constituted by the pressing portion and the male screw portion, and when at least one of the hole portion and the pressing portion is formed on the tapered surface, the male screw is formed. By changing the screwing amount of the portion into the female screw portion, the force with which the pressing portion presses the inner wall of the hole portion can be changed, so that the above-mentioned deflection and adjustment work can be performed more easily. When the outer peripheral portion of the tool in which these holes and pressing portions are formed is formed in a cylindrical surface shape that recedes toward the tool center side from the outer peripheral end portion of the insert,
The size of the male screw portion and the pressing portion can be freely set without enlarging the outer peripheral portion of the tool toward the outer peripheral side of the tool. When machining a part, interference between the wall surface of the work material and the tool body can be prevented, and the uncut width can be minimized.

[Brief description of the drawings]

FIG. 1 shows an embodiment in which the present invention is applied to a face mill, and is an axial sectional view of the face mill.

FIG. 2 is a view as seen from the direction I in FIG. 1;

FIG. 3 is a view from arrow II in FIG. 1;

FIG. 4 is a view showing the shape of the outer peripheral portion of the distal end of the tool main body in a state where components mounted on these are removed.

FIG. 5 is a diagram showing a correlation between the amount of screwing of an adjustment screw and the amount of deflection of a tip.

FIG. 6 is a view showing another embodiment of the present invention, and is an axial sectional view of a face milling machine.

FIG. 7 is a view as seen from the direction of arrow III in FIG. 6;

FIG. 8 is a view as seen from an IV direction in FIG. 6;

FIG. 9 is an enlarged sectional view showing a tip end portion of a tool main body to which a tip is mounted.

FIG. 10 is a sectional view showing an example in which the present invention is applied to a conventional face mill as it is.

FIG. 11 is a view showing a modification of the embodiment shown in FIGS. 6 to 9, and is an axial sectional view of a face milling machine.

FIG. 12 is a view as seen from the direction V in FIG. 11;

FIG. 13 is a diagram showing an example in which the notch groove is changed, and is a diagram showing an outer peripheral portion of the tool main body in an example in which a notch groove extending in the tool circumferential direction is formed.

FIG. 14 is a sectional view taken along line VI-VI of FIG.

FIG. 15 is a diagram showing an outer peripheral portion of a tool in an example in which a cutout groove is configured by a combination of two types of grooves.

FIG. 16 is a diagram showing an outer peripheral portion of the tool in an example in which the extending direction of the notch groove is changed.

FIG. 17 is a view showing a tool outer peripheral portion in an example further modified from FIG. 16;

FIG. 18 is a diagram showing an example in which the pressing means is changed, and is a diagram showing the outer peripheral portion of the tool.

19 is a sectional view taken along line VII-VII in FIG.

FIG. 20 is a diagram showing an outer peripheral portion of a tool in an example in which the example shown in FIG. 18 is further modified.

FIG. 21 is a view showing an example in which the present invention is applied to a face mill to which a chip is mounted using a supporter, and is an axial sectional view of the face mill.

22 is a view as seen from the direction of arrow VIII in FIG. 21.

FIG. 23 is a view as seen from the direction IX in FIG. 21;

FIG. 24 is a diagram illustrating an example in which the present invention is applied to a side cutter, and is a diagram illustrating a state where an outer peripheral portion of the side cutter is developed.

FIG. 25 is a side view of the side cutter.

FIG. 26 is a side view showing an example in which the present invention is applied to an end mill.

FIG. 27 is a view as seen from the X direction in FIG. 26;

FIG. 28 is a view as seen from the direction XI in FIG. 26;

FIG. 29 is an axial sectional view showing an example of a conventional face milling machine.

FIG. 30 is a bottom view of a conventional face milling machine.

[Explanation of symbols]

 7 ... Indexable insert 21,41,50,60,70,80,90,100 ... Tool body 24 ... Mounting groove 26b ... Constraining surface 27,81 ... Recess 28,83 ... Adjustment screw (pressing means) 29 Taper hole (hole) 30 Female thread 31, 51, 61, 71, 72, 86 Notch groove 35 Male thread 36 Pressing part 82 Square hole (hole) 84a …… Male thread 85 …… Wedge member

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Toru Narita 1528 Nakashinda, Yokoi, Kobe-cho, Yasuhachi-gun, Gifu Pref. 58-63915 (JP, U) Jiko 43-62,062 (JP, Y1) (58) Field surveyed (Int. Cl. ⁷ , DB name) B23C 5/06-5/22

Claims (2)

(57) [Claims] 1. An outer peripheral portion of a tool body that is rotated about an axis has a mounting groove formed at a tip and an outer periphery of the tool body, and a throw-away tip is mounted in the mounting groove by a clamp member. In a throw-away type cutter in which a front cutting edge of a throw-away tip protrudes from a distal end surface of a tool main body, a concave portion depressed toward a center side of the tool main body at an outer peripheral portion of the tool main body at a base end side close to the mounting groove A notch groove is formed in the outer peripheral portion of the tool main body, the notch groove being open to the concave portion and the mounting groove. The side surface of the throw away tip facing the base end side of the tool main body facing the front cutting edge and the concave portion are formed. In between, there is formed a displacement portion having a restraining surface in contact with the side surface and partitioned by the recess, the notch groove, and the restraining surface and capable of being displaced in a direction intersecting the side surface. Depression An adjusting screw having a tapered pressing portion for pressing the inner wall of the portion to displace the displacing portion is screwed into the adjusting portion, and the displacing portion is elastically displaced in the direction of the side surface by the pressing portion of the adjusting screw. A throw-away cutter characterized in that the tip is slightly moved toward the distal end in the axial direction with respect to the clamp member so that the protrusion amount of the front cutting edge of the throw-away tip can be adjusted. 2. An outer peripheral portion of the tool main body in which the concave portion is formed is formed in a cylindrical surface retreating toward the center in the tool radial direction from an end of the indexable insert on the outer peripheral side of the tool. The indexable cutter according to claim 1, wherein: