JP2007136573A - Insert type end mill - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an insert type end mill, simply and reliably adjusting the positions of a plurality of inserts, remarkably reducing the time and labor required for cutting edge run-out adjusting work, and obtaining high cutting edge run-out accuracy. <P>SOLUTION: This insert type end mill 1 includes: a shank part 2A and a blade tip part 2B extended along the axis O, wherein the insert 21 is mounted on the outer periphery of the forward end of the knife edge part 2B. One of a plurality of mounting seats 4 is taken as a reference mounting eye 4A where the position in the axis O of the cutting edge 26 of the mounted insert 21 is fixed, and the other mounting seat 4 are taken as adjusting mounting seat 4B including an adjusting mechanism for adjusting the position in the direction of axis O of the cutting edge 26 of the mounted insert 21. The cutting blade 26 of the insert 21 mounted on the reference mounting seat 4A is projected from the tip face of the blade tip part 2B more than the cutting edge 26 of the insert 21 before it is mounted on the adjusting mounting seat 4B and positioned by the adjusting mechanism. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an insert type end mill to which an insert having a cutting edge is detachably mounted.

  2. Description of the Related Art Conventionally, as a cutting tool for subjecting a workpiece to grooving, finishing a narrow flat surface, and the like, an end mill having cutting edges directed toward the front end side and the outer peripheral side of a tool body has been provided. As this type of end mill, there are a solid end mill in which a cutting edge is fixed to a tool body, and an insert type end mill in which an insert having a cutting edge is detachably attached to the tool body.

  Since the position of the cutting edge is fixed in the solid end mill, the deflection of each cutting edge (cutting edge) can be adjusted by adjusting the amount of protrusion of the cutting edge from the tool body tip when manufacturing this end mill. (The difference between the maximum value and the minimum value of the protrusion amount) can be matched with high accuracy. In addition, since only a small part of the tool body is required, rigidity can be secured even with a small-diameter end mill.

  However, in such a solid end mill, the position of the cutting edge cannot be adjusted, so that when the cutting edge wears and re-polishs due to use, the cutting edge cannot be adjusted and the work surface of the work material is cut. Cannot be finished with high accuracy. Therefore, in such a solid end mill, there was a problem that the cutting edge could not be used after re-polishing, the life was shortened, and the usage cost was increased.

On the other hand, since an insert type end mill is detachably mounted with an insert having a cutting edge, when the cutting edge of the insert is worn, it can be used again by replacing the insert.
Here, in an insert type end mill having a plurality of inserts, when the amount of protrusion of the cutting edge of each insert is different and the fluctuation of the cutting edge is large, the cutting edge that is greatly protruded wears preferentially. Replacement frequency increases and the surface roughness of the finished surface of the work material deteriorates, so that the cutting edge of each insert has a high cutting edge runout so that the amount of protrusion from the tool body is the same. Must be accurate. That is, the inserts must be mounted so that the rotation trajectory around the axis O of the tool body drawn by the cutting blade of each insert matches.

Therefore, an insert type end mill having an adjustment mechanism for adjusting the protruding amount of each cutting blade by moving the position of the insert has been proposed.
As an insert position adjustment mechanism, an insert is sandwiched between a wall surface on the rear side in the tool body rotation direction of the mounting seat and a wedge member inserted on the front side in the tool rotation direction of the mounting seat. There are some which project the cutting edge of the insert from the tool body by pressing the side facing the end side with the tip of the adjustment screw or the pressing surface of the adjustment wedge.

Also, the insert is attached to the mounting seat with a clamp screw, and the side of the insert facing the rear end of the tool body is pressed with the tip of the adjustment screw or with the pressing surface of the adjustment wedge. There is also provided a mechanism for elastically deforming a screw to project a cutting blade from a tool body.
In the conventional insert type end mill, the adjustment mechanism as described above is provided in all the mounting seats, the position of all the inserts mounted on the mounting seat can be adjusted, and the runout of the cutting blade can be reduced. .

An insert-type end mill equipped with such an adjustment mechanism moves the position of the insert with an adjustment screw or adjustment wedge to adjust the runout of the cutting blade, and then rotates the tool body around its axis O while rotating at high speed. By being sent in a direction crossing O, the workpiece is cut by a cutting blade directed toward the tool body radial direction outside of the insert and the tool body tip side.
JP 2002-355716 A

  By the way, in the insert type end mill provided with the conventional adjustment mechanism, the runout adjustment of the cutting blade is performed in the following procedure. First, inserts are mounted on all mounting seats, and the protruding amount of the cutting blade of each insert is confirmed. After firmly fixing the insert of the mounting seat from which the cutting blade protrudes, the position of other inserts is adjusted based on the protruding amount of the cutting blade of the insert mounted on the mounting seat.

When adjusting the runout of the cutting edge in this way, it is first necessary to find the mounting seat from which the cutting edge protrudes the most, but it is easy to find the difference in the protruding amount of the cutting edge that slightly protrudes from the tool body. Rather, it took a lot of time and effort to adjust the runout.
Moreover, since the position adjustment mechanism of the insert is also provided in the reference mounting seat, the insert may move when trying to firmly fix the insert. When the insert has moved, the amount of protrusion of the cutting edge changes, so it was necessary to check the amount of protrusion of the cutting edge again.

  In addition, the reference mounting seat changes each time the insert is replaced, and it is necessary to adjust the protruding amount of multiple cutting edges. There was a risk of misunderstanding. If machining is performed while misunderstanding that the runout adjustment of the cutting edge has been completed, there is a possibility that troubles may occur such that the workpiece becomes defective or the insert is damaged.

  The present invention has been made in view of the above-described circumstances, and can easily and reliably adjust the positions of a plurality of inserts, and can significantly reduce the time and labor required for adjusting the runout of the cutting blade. An object of the present invention is to provide an insert type end mill capable of obtaining high cutting edge runout accuracy.

  In order to solve the above-mentioned problems, the present invention includes a shank portion extending along an axis, and a blade edge portion disposed on the distal end side of the shank portion, and a plurality of mounting seats on the outer periphery on the distal end side of the blade edge portion. An insert-type end mill in which an insert having a cutting edge is detachably attached to the mounting seat, and the cutting blade of the insert is arranged so as to protrude from the tip surface of the blade edge part, One of the plurality of mounting seats is a reference mounting seat in which the axial position of the cutting blade of the inserted insert is fixed, and the remaining mounting seats are the mounting seats of the inserted insert. An adjustment mounting seat provided with an adjustment mechanism for adjusting the axial position of the cutting blade is provided, and the cutting blade of the insert mounted on the reference mounting seat is mounted on the adjustment mounting seat and the adjustment mechanism. According Than the cutting edge of the insert prior to the position adjustment is characterized by being protruded from the blade tip surface.

  In the insert type end mill of this configuration, a reference mounting seat in which the position of the cutting edge of the insert is fixed is provided, and the protrusion amount of the insert mounted on this reference mounting seat is the insert mounted on the remaining adjustment mounting seat. Since it is set so that it protrudes from the tip of the cutting edge than the cutting edge, the cutting amount of the cutting edge of the standard mounting seat is always the largest when the insert is mounted on all mounting seats. When performing the adjustment, the adjustment can be made with the cutting edge of the reference mounting seat as a reference, and the time and labor required for adjusting the cutting edge runout can be greatly reduced.

In addition, since the reference mounting seat is not equipped with an adjustment mechanism that adjusts the position of the cutting blade, the insert mounted on the reference mounting seat does not move, and the protruding amount of the reference cutting blade is stable. become. Therefore, the protrusion amount used as a reference does not change during the cutting edge deflection adjustment operation, and high cutting edge deflection accuracy can be obtained.
Furthermore, the cutting edge of the insert mounted on the reference mounting seat is always the most protruding, and the cutting edge can be adjusted with reference to this cutting edge. It is possible to adjust the runout of the cutting blade reliably and easily without mistaking the seat. Therefore, since the runout of the cutting edge of the insert type end mill can be reduced, the workpiece can be cut easily, the finished surface can be finished smoothly, and there is no insert that preferentially wears and the insert can be replaced. The frequency can be lowered.

  Here, the difference in the axial direction between the cutting blade of the insert before being mounted on the adjustment mounting seat and performing position adjustment by the adjusting mechanism, and the cutting blade of the insert mounted on the reference mounting seat. Is set within the range of 0.01 mm to 0.10 mm, the amount of protrusion when the insert is mounted on the reference mounting seat can be set within a range suitable for cutting, and the amount of protrusion of the cutting blade Therefore, it is possible to prevent the trouble that the insert is damaged at the time of cutting due to being too large, or the trouble that the cutting edge of the cutting edge is too small and the blade edge part slides with the workpiece.

  In addition, the adjustment mechanism is formed on the rear end side of the blade edge portion of the adjustment mounting seat and extends in a direction intersecting the axial direction, and elastically deforms to press the side surface of the insert to thereby insert the insert. The adjustment piece is formed in a cylindrical shape, and a slit extending along the axis of the cylindrical body is formed. And an adjustment screw having a head having a diameter larger than that of the male screw portion is inserted, the male screw portion is screwed to the bottom surface of the hole portion, and the head portion contacts the inner peripheral surface of the adjustment piece. A diameter-enlarged portion that is brought into contact with each other and that gradually increases in diameter toward the opposite side of the insertion direction of the adjustment piece on the inner peripheral surface of the adjustment piece or the head of the adjustment screw; Screw in or loosen the adjustment screw. Since the amount out deflection of the insert by or be retractably adjustable, it can be performed easily and accurately adjust the position of the insert.

  In other words, when the adjustment screw is screwed in, the head of the adjustment screw moves inward of the adjustment piece, and the insert attached to the mounting seat is pressed and elastically deformed so that the adjustment piece having the slit is expanded. By loosening the screw, the head of the adjustment screw moves to the outside of the adjustment piece, and the adjustment piece that has been spread out is elastically restored and the pressing force that presses the insert is weakened. The position of the insert can be adjusted by adjusting.

Also, since the adjustment screw is elastically deformed and pressed so that the adjustment screw itself can be tightened, the adjustment screw is prevented from loosening even when this end mill is rotated at high speed, and the runout accuracy of the cutting blade is maintained. The insert can be firmly fixed as it is.
In addition, since the part that cuts out the tool body to provide the adjustment mechanism is only the hole part into which the adjustment piece is inserted, the part that cuts out the tool body can be reduced, and the rigidity of the end mill can be secured. Even a small-diameter end mill can be provided with an insert adjusting mechanism.

  Further, a clamp screw hole is formed in a wall surface of the reference mounting seat and the adjustment mounting seat facing radially outside the blade edge portion, and a screw insertion hole extending in the thickness direction of the insert is formed in the insert, the screw By screwing the clamp screw inserted through the insertion hole into the clamp screw hole, the portion to be cut out of the blade edge portion for mounting the insert can be reduced by configuring the insert to be mounted. The rigidity of the end mill can be ensured, and even if the end mill has a small diameter, it is not necessary to reduce the number of blades.

  Even if the cutting edge of the insert is re-polished by forming a diamond layer on the entire surface of the rake face, the cutting edge is made of diamond. Thus, the life of the insert can be extended. In addition, since the cutting edge is made of diamond, it can be satisfactorily cut even when the material to be cut is made of aluminum or an aluminum alloy.

  As described above, according to the present invention, the position adjustment of a plurality of inserts can be performed easily and reliably, the time and labor required for the cutting edge run-out adjustment work can be greatly reduced, and high cutting edge runout accuracy can be obtained. An insert type end mill that can be provided can be provided.

Hereinafter, an insert type end mill according to an embodiment of the present invention will be described with reference to the accompanying drawings.
This insert type end mill 1 includes a tool body 2 including a shank portion 2A having a cylindrical shape centering on an axis O, and a cutting edge portion 2B disposed on a tip side (lower side in FIG. 1) of the shank portion 2A. Have. In this embodiment, as shown in FIG. 1, the blade edge portion 2B has a one-step larger diameter than the shank portion 2A.

  A plurality of insert pockets 3 are formed in the outer peripheral portion on the front end side of the cutting edge portion 2B so as to open to the outer peripheral surface and the front end surface of the cutting edge portion 2B. Each is provided with a mounting seat 4. In the present embodiment, as shown in FIG. 2, the four chip pockets 3 and the mounting seats 4 are formed at 90 ° intervals in the circumferential direction.

  As shown in FIGS. 3 and 4, the wall surface 6 facing the tool rotation direction T front side of the mounting seat 4 is inclined so as to go to the tool rotation direction T front side as it goes to the tip end side of the cutting edge portion 2B. Further, as shown in FIG. 1, the wall surface 5 of the mounting seat 4 facing the radially outer side of the blade edge portion 2B is inclined so as to recede toward the inner edge of the blade edge portion 2B in the direction toward the distal end side of the blade edge portion 2B. And the clamp screw hole screwed together with the clamp screw 7 for attaching the insert 21 to the wall surface 5 facing the blade tip portion 2B radial outside of the mounting seat 4 so as to extend toward the blade tip portion 2B radial inside. Is formed.

One of the plurality of mounting seats 4 is a reference mounting seat 4A, and the remaining mounting seats 4 other than the reference mounting seat 4A are adjustment mounting seats 4B.
As shown in FIG. 3, on the rear end side of the cutting edge portion 2B of the reference mounting seat 4A, an abutting surface 8 that comes into contact with the side surface of the insert 21 facing the rear end side of the cutting edge portion 2B is directly on the cutting edge portion 2B itself. Is formed. The contact surface 8 is inclined so as to gradually recede toward the rear end side of the cutting edge portion 2B as it goes toward the front side of the tool rotation direction T.

  On the other hand, a hole 9 is formed on the rear end side of the blade edge portion 2B of the adjustment mounting seat 4B so as to extend inward in the radial direction of the blade edge portion 2B. The hole 9 has an oval cross section, and the side edge on the side of the adjustment mounting seat 4B is opened toward the mounting seat 4. The outer peripheral side of the blade edge portion 2B of the hole 9 is An adjustment screw hole 10 extending toward the inner side in the radial direction of the blade edge portion 2B is formed in the bottom surface.

The adjustment piece 11 shown in FIGS. 5 and 6 is inserted into the hole 9. The adjustment piece 11 has a cylindrical shape having an outer shape that can be inserted into an oval cross section formed by the hole 9, and a surface facing the adjustment mounting seat 4 </ b> B is a flat surface. Has been. The inner surface of the cylindrical body formed by the adjustment piece 11 has a circular cross section, and the diameter gradually increases toward the side opposite to the insertion direction of the adjustment piece 11 (in this embodiment, the outer side in the radial direction of the cutting edge 2B). A diameter hole 13 is formed, and the insertion direction side of the diameter expansion hole 13 is a small diameter hole 14 that is coaxial with the diameter expansion hole 13 and has a small inner diameter, and penetrates the adjustment piece 11. The central axes of the enlarged diameter hole 13 and the smaller diameter hole 14 are parallel to the pressing portion 12.
The adjustment piece 11 is provided with a slit 15 extending in parallel with the pressing portion 12 and along the central axis of the circular cross section of the small diameter hole 14. Is formed.

  An adjustment screw 16 is inserted into the adjustment piece 11 so as to penetrate the small diameter hole 14 and the diameter expansion hole 13. The adjustment screw 16 has a male screw portion 17 at the front end side and a head portion 18 having a larger diameter than the male screw portion 17 at the rear end side. The head portion 18 is a rear end side of the adjustment screw 16. It is formed in a taper shape whose diameter gradually increases as it goes to. Then, the adjustment piece 11 is inserted into the hole 9, the adjustment screw 16 is inserted into the inner peripheral portion of the adjustment piece 11, and the male screw portion 17 is formed on the bottom surface of the hole 9 facing the radial outside of the cutting edge 2 </ b> B. By screwing into the adjusting screw hole 10, the head 18 formed in a tapered shape and the diameter-enlarged hole 13 of the adjusting piece 11 are arranged so as to contact each other.

  Here, the clamp screw hole drilled in the wall surface 5 facing the radially outer side of the blade edge portion 2B of the reference mounting seat 4A is a clamp screw drilled in the wall surface 5 facing the radially outer side of the blade edge portion 2B of the adjustment mounting seat 4B. It is provided at a position shifted from 0.01 mm to 0.10 mm (0.02 mm in this embodiment) on the tip end side of the blade edge portion 2B from the hole.

  The insert 21 attached to the reference attachment seat 4A and the adjustment attachment seat 4B is composed of an insert body 22 made of a hard material such as cemented carbide and a cutting edge portion 23 made of diamond. The insert 21 has a substantially rectangular flat plate shape, and a screw insertion hole 24 is formed so as to penetrate two rectangular surfaces in the thickness direction.

  The insert 21 is mounted on the reference mounting seat 4A and the adjustment mounting seat 4B with one square surface facing inward in the radial direction of the blade edge portion 2B, and a side surface facing the front side in the tool rotation direction T is a scooping surface 25. The cutting edge portion 23 is arranged along the surface 25 so as to cover the entire rake face 25, and the edge portion 2B of the rake face 25 faces the radially outer side of the cutting edge part 2B and the side of the cutting edge part 2B. A cutting blade 26 is formed on the surface.

The other square surface directed outward in the radial direction of the blade edge portion 2B is an outer peripheral flank 27, and the tool rotation direction T on the rear side portion of the other square surface in the tool rotation direction T is shown in FIG. An inclined surface is formed so as to recede inward in the radial direction of the blade edge portion 2B as it goes in the direction T rear side.
Further, the side face directed to the front end side of the cutting edge portion 2B is a front flank 28, and gradually recedes toward the rear end side of the cutting edge portion 2B as shown in FIG. And as shown in FIG. 4, it is made to incline so that it may reverse | retreat to the rear end side of the blade edge part 2B gradually as it goes to the tool rotation direction T rear side.

Further, as shown in FIG. 2, the rake face 25 is inclined so as to gradually protrude toward the front side in the tool rotation direction T as viewed from the axis O direction toward the outer side in the radial direction of the cutting edge 23. The radial rake angle of the insert 21 is set to + 10 °.
Further, the side surface facing the rake face 25 is formed in parallel with the rake face 25 and is in contact with the wall surface 6 facing the front side in the tool rotation direction T of the mounting seat 4. And since the wall surface 6 which faces the tool rotation direction T front side of the attachment seat 4 is inclined so that it may go to the tool rotation direction T front side as it goes to the blade edge | tip part 2B front side as mentioned above, it is a rake surface 25. Also, as it goes toward the front end side of the cutting edge portion 2B, it tilts toward the front side of the tool rotation direction T, and the axial rake angle of the insert 21 is + 10 °.

  The clamp screw 7 is inserted into the screw insertion hole 24 of the insert 21 and screwed into the clamp screw hole, and the insert 21 is mounted on the reference mounting seat 4A and the adjustment mounting seat 4B. In the reference mounting seat 4 </ b> A, the side surface of the insert 21 facing the rear end side of the cutting edge portion 2 </ b> B is disposed and fixed so as to contact the contact surface 8.

Here, in the reference mounting seat 4A, the clamp screw hole is formed on the tip side of the blade edge portion 2B with respect to the clamp screw hole of the adjustment mounting seat 4B, so that the cutting blade 26 of the insert 21 mounted on the reference mounting seat 4A is provided. The cutting edge 26 of the insert 21 that is just attached to the adjustment mounting seat 4B by the clamp screw 7 protrudes from the front end surface of the cutting edge portion 2B. At this time, the difference in the axis O direction between the cutting edge 26 of the insert 21 mounted on the reference mounting seat 4A and the cutting blade 26 of the insert 21 mounted on the adjustment mounting seat 4B is 0.01 mm to 0.10 mm. (0.02 mm in this embodiment).
In the adjustment mounting seat 4 </ b> B, the insert 21 is disposed so that the side surface of the insert 21 facing the rear end side of the cutting edge portion 2 </ b> B and the pressing portion 12 of the adjustment piece 11 inserted into the hole 9 abut.

  The insert type end mill 1 configured in this way has a shank portion 2A on the rear end side of the tool body 2 attached to the spindle end of the machine tool, and rotates at high speed in the tool rotation direction T around the axis O. By being fed in a direction crossing O, the workpiece is cut by the cutting edge 26 directed radially outward of the cutting edge 2B of the insert 21 and toward the tip of the cutting edge 2B.

  In the insert type end mill 1 having this configuration, the runout adjustment of the cutting edge 26 is performed as follows. First, the position of the cutting edge 26 of the insert 21 mounted on the reference mounting seat 4A in the direction of the axis O is confirmed. The adjustment screw 16 is screwed in or loosened to adjust the position of the cutting blade 26 of the insert 21 mounted on the remaining adjustment mounting seat 4B on the basis of the protrusion amount of the cutting edge 26 of the reference mounting seat 4A from the tip end surface 2B. To do.

  When the adjustment screw 16 is screwed in, the head 18 of the adjustment screw 16 that is in contact with the diameter expansion hole 13 of the adjustment piece 11 presses the diameter expansion hole 13, and the adjustment piece 11 is expanded using the end point of the slit 15 as a fulcrum. Thus, the pressing portion 12 presses the side face of the insert 21 facing the rear end side of the blade edge portion 2B, and the insert 21 protrudes toward the tip end side of the blade edge portion 2B. On the other hand, when the adjustment screw 16 is loosened, the adjustment piece 11 that has been elastically deformed so as to be expanded is elastically restored, and the force of pressing the side surface of the insert 21 facing the rear end side of the blade edge portion 2B is reduced. The insert 21 is retracted toward the rear end side of the blade edge portion 2B.

  According to the insert type end mill 1 according to the present embodiment, when the insert 21 is mounted on the reference mounting seat 4A and the adjustment mounting seat 4B, the cutting edge 26 of the insert 21 mounted on the reference mounting seat 4A is adjusted to the adjustment mounting seat 4B. The cutting edge 26 protrudes from the tip end surface of the cutting edge 2B rather than the cutting edge 26 of the insert 21 attached to the insert 21. Therefore, the runout adjustment of the cutting edge 26 is performed with reference to the cutting edge 26 of the insert 21 attached to the reference mounting seat 4A. Therefore, the deflection adjustment operation of the cutting blade 26 can be performed easily and reliably.

  Further, the difference in the axis O direction between the cutting edge 26 of the insert 21 mounted on the reference mounting seat 4A and the cutting blade 26 of the insert 21 mounted on the adjustment mounting seat 4B is 0.01 mm to 0.10 mm. Since it is configured to be 0.02 mm in the embodiment, the protruding amount of the cutting blade 26 can be made suitable for cutting, and the insert 21 is damaged or the cutting edge portion 2B is in contact with the workpiece. Troubles such as can be prevented in advance.

  Further, the reference mounting seat 4A is formed with a contact surface 8 which is in contact with the side surface facing the rear end side of the blade edge portion 2B of the insert 21, so that the position of the insert 21 is securely fixed, and the cutting blade The insert 21 does not move during the runout adjustment work of 26, and the protruding amount of the cutting edge 26 serving as a reference is stabilized. Therefore, the deflection adjustment of the cutting edge 26 can be performed accurately and reliably.

Further, since the position of the insert 21 in the direction of the axis O can be adjusted by the adjustment screw 16 so as to be able to advance and retract, the amount of protrusion of the cutting blade 26 can be easily adjusted.
Further, since the adjustment piece 11 is elastically deformed to press the insert 21 and the adjustment screw 16 itself is pressed so as to be tightened, the adjustment screw 16 is loosened when the insert type end mill 1 is rotated at a high speed. Thus, the insert 21 can be firmly fixed while the projection amount of the cutting blade 26 is reliably maintained.

  The adjustment mechanism includes a cylindrical adjustment piece 11 and a hole 9 into which the adjustment piece 11 is inserted, and the hole 9 is drilled along the radial direction of the cutting edge 2B. Therefore, the portion where the blade edge portion 2B is cut out is small, the rigidity of the end mill 1 can be ensured, and even if the end mill 1 has a small diameter, the runout adjustment of the cutting blade 26 of the insert 21 can be performed.

  Further, a clamp screw hole is formed in the wall surface 5 facing the outer side in the radial direction of the blade edge portion 2B of the reference mounting seat 4A and the adjustment mounting seat 4B so that the thickness direction of the insert 21 substantially coincides with the radial direction of the blade edge portion 2B. Since it is attached, it is possible to reduce the portion where the blade edge 2B is cut out in order to form the mounting seat 4, and it is possible to ensure the rigidity of the insert type end mill 1 and to insert even if the end mill 1 has a small diameter. There is no need to reduce the number.

  Further, a cutting blade portion 23 made of diamond is disposed on the entire rake face 25 of the insert 21 and a cutting edge 26 is formed on a side ridge portion of the rake face 25. Even when repolished, the new cutting edge 26 is also made of diamond, and the life of the insert 21 can be extended. Further, since the cutting edge 26 is made of diamond, it can be satisfactorily cut even when the material to be cut is aluminum or an aluminum alloy.

Although the insert type end mill according to the embodiment of the present invention has been described above, the present invention is not limited to this, and can be appropriately changed without departing from the technical idea of the present invention.
For example, although it has been described as having four inserts, the present invention is not limited to this, and it is preferable to set appropriately according to the outer diameter of the end mill, the type of material to be cut, and the like.

  In addition, the adjustment mechanism has been described as a cylindrical adjustment piece and a hole for inserting the adjustment piece. However, the adjustment mechanism is not limited, and for example, the adjustment screw can be used to adjust the side surface of the insert. It may be an adjustment mechanism that adjusts by pressing and adjusting the insert on the side surface of the wedge material. However, it is preferable to use a prepared piece as in the present embodiment, since the portion that cuts out the blade edge portion can be kept small.

Moreover, although the insert type end mill that fixes the insert with a clamp screw has been described, the insert may be sandwiched and fixed with a wedge member between the tool body. However, those fixed with a clamp screw are preferable because the insert is firmly fixed without being displaced.
Moreover, although the cutting edge portion of the insert has been described as being composed of diamond, it may be composed of another hard material such as a cBN sintered body, and is composed of a cemented carbide similar to the insert body. Also good.

It is a side view of the insert type end mill which is an embodiment of the present invention. It is a bottom view of the insert type end mill shown in FIG. It is a side enlarged view of the reference | standard mounting seat with which the insert type end mill shown in FIG. 1 was equipped. FIG. 2 is an enlarged side view of an adjustment mounting seat provided in the insert type end mill shown in FIG. 1. It is a front view of the adjustment piece with which the adjustment mounting seat shown in FIG. 4 was equipped. It is side surface sectional drawing of the adjustment piece shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Insert type end mill 2 Tool main body 2A Shank part 2B Cutting edge part 3 Tip pocket 4A Reference mounting seat 4B Adjustment mounting seat 5 Wall surface facing the blade edge part radial direction 7 Clamp screw 8 Contact surface 9 Hole 10 Adjustment screw hole 11 Adjustment piece 12 Pressing part 13 Large diameter hole 14 Small diameter hole 15 Slit 16 Adjustment screw 18 Head 21 Insert 23 Cutting edge part 25 Rake face 26 Cutting edge

Claims (5)

A shank portion extending along the axis, and a blade tip portion disposed on the tip end side of the shank portion, and a plurality of mounting seats are formed on the outer periphery of the tip end portion of the shank portion, and a cutting blade is provided on the mounting seat. An insert-type end mill that is detachably mounted and has the cutting blade of the insert disposed so as to protrude from the tip surface of the cutting edge portion;
One of the plurality of mounting seats is a reference mounting seat in which the axial position of the cutting blade of the inserted insert is fixed,
The remaining mounting seat is an adjusting mounting seat provided with an adjusting mechanism for adjusting the axial position of the cutting blade of the inserted insert.
The cutting blade of the insert mounted on the reference mounting seat protrudes from the tip end surface of the cutting edge portion more than the cutting blade of the insert before being mounted on the adjustment mounting seat and performing position adjustment by the adjusting mechanism. An insert-type end mill characterized by   The difference in the axial direction between the cutting blade of the insert before being mounted on the adjustment mounting seat and performing position adjustment by the adjusting mechanism and the cutting blade of the insert mounted on the reference mounting seat is 0. The insert type end mill according to claim 1, wherein the insert type end mill is set in a range of 0.01 mm to 0.10 mm. The adjustment mechanism includes a hole formed in the rear end side of the blade edge portion of the adjustment mounting seat and extending in a direction intersecting the axial direction, and a shape that can be inserted into the hole to be elastically deformed. An adjustment piece that adjusts the position of the insert by pressing the side surface of the insert,
The adjustment piece is formed in a cylindrical shape, is formed with a slit extending along the axis of the cylindrical body, and has a male screw portion and a diameter larger than that of the male screw portion in the inner peripheral portion of the cylindrical body. An adjustment screw having a head is inserted,
The male screw portion is screwed to the bottom surface of the hole portion, and the head portion is brought into contact with the inner peripheral surface of the adjustment piece, and the inner peripheral surface of the adjustment piece or the head of the adjustment screw The insert type according to claim 1 or 2, wherein at least one of the portions is provided with a diameter-expanding portion that gradually increases in diameter toward the opposite side to the insertion direction of the adjustment piece. End mill. Clamp screw holes are formed on the wall surfaces of the reference mounting seat and the adjustment mounting seat facing the radial outside of the blade edge portion,
A screw insertion hole extending in the thickness direction of the insert is formed in the insert, and a clamp screw inserted into the screw insertion hole is screwed into the clamp screw hole, and the insert is mounted. The insert type end mill according to any one of claims 1 to 3.   The insert type end mill according to any one of claims 1 to 4, wherein a surface of the insert facing the front side in the tool rotation direction is a rake face, and a diamond layer is formed on the entire rake face. .

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