JP2013082047A - Cutting insert-clamping wedge member, and edge-changeable cutting tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform highly accurate and stable cutting work by enabling the accurate setting of the cutting edge projection amount of a cutting insert without complicating the structure of a tool body.SOLUTION: This cutting insert-clamping wedge member 10 for clamping and fixing the cutting insert 1 having the cutting edge 4 at the outer peripheral edge of a rake face 2 onto an insert mounting seat 32 formed on a tool body 31 includes a wedge body 11 which is pushed into a recess 37 of the tool body 31 and which has a clamping face 12 to abut on the rake face 2 or the seating face of the cutting insert 1, a wedge face 13 formed to be gradually less spaced from the clamping face 12 toward the pushing-in direction of the wedge body 11, a through-hole 14 extending along the pushing-in direction for a clamping screw 5 to be inserted thereinto, and a receiving face 15 opposed to a side face 3 of the cutting insert 1, formed along the axial direction of the through-hole 14, and raised up relative to the clamping face 12.

Description

  The present invention relates to a wedge member for a cutting insert clamp and a cutting edge exchange type cutting tool using the wedge member.

  2. Description of the Related Art Conventionally, a blade-tip-exchangeable cutting tool that performs milling on a work material made of a metal material or the like is known. This type of cutting edge-replaceable cutting tool has a disk shape, and a tool body in which a plurality of insert mounting seats are formed on the outer periphery of the tip thereof at intervals in the circumferential direction, and is detachably mounted on the insert mounting seat. And a cutting insert clamping wedge member (hereinafter, wedge member) that clamps and fixes the cutting insert to the insert mounting seat.

  Such a wedge-type blade edge exchangeable cutting tool is provided with a cutting blade runout adjustment mechanism for adjusting the cutting edge protrusion amount between cutting inserts mounted on each insert mounting seat, for example, a finished surface. Used for cutting that requires high precision. Further, by adjusting the cutting edge protrusion amount in this way, not only the finished surface accuracy is improved, but also the chipping of the cutting edge and the variation in wear amount are suppressed, and the effect of extending the tool life can be obtained.

  For example, the following Patent Document 1 describes a so-called front wedge type cutting edge exchangeable cutting tool in which a wedge member is disposed on a rake face side (a front side in the tool rotation direction) of a cutting insert. Further, Patent Document 2 below describes a so-called behind wedge type cutting edge exchangeable cutting tool in which a wedge member is disposed on the side opposite to the rake face of the cutting insert (the rear side in the tool rotation direction).

JP 2010-501363 A US Pat. No. 7,390,150

However, the above-mentioned conventional wedge member for cutting insert clamp and the cutting edge replaceable cutting tool have the following problems.
That is, in the conventional wedge-type cutting edge exchangeable cutting tool, a cutting blade runout adjustment mechanism for setting the cutting edge protrusion amount of the cutting insert is provided in the tool body, and the cutting blade runout adjustment mechanism is provided in the tool body. The space for providing it had to be secured, and the structure of the tool body was complicated. Moreover, since a cutting edge run-out adjusting mechanism is provided for a tool body having a large external shape, it is difficult to process.

  The present invention has been made in view of such circumstances, and it is possible to accurately set the cutting edge protrusion amount of the cutting insert without complicating the structure of the tool body, and to perform highly accurate and stable cutting. It aims at providing the wedge member for cutting insert clamp which can be performed, and a blade-tip-exchange-type cutting tool.

In order to achieve the above object, the present invention proposes the following means.
That is, the present invention is for a cutting insert clamp that clamps and fixes a cutting insert having a plate shape and having a cutting edge on the outer peripheral edge of a rake face facing the thickness direction to an insert mounting seat formed in the tool body. A wedge member, which is pushed into a recess of the tool body, includes a clamp surface abutting against a rake face or a seating surface facing the thickness direction of the cutting insert, and a back face to the clamp face. A wedge surface formed so that the distance from the clamp surface gradually becomes narrower toward the pushing direction of the wedge body, and a through-hole that extends along the pushing direction and into which a clamp screw is inserted And facing the side surface facing the direction perpendicular to the thickness direction of the cutting insert, and formed along the axial direction of the through-hole, A receiving surface that rises against the pump surface, characterized in that is provided.
Further, the present invention provides a tool body having a disk shape, and a plurality of insert mounting seats formed on the outer periphery of the tip thereof at intervals in the circumferential direction, and cutting inserts that are detachably mounted on the insert mounting seats, respectively. A cutting insert clamping wedge member that clamps and fixes the cutting insert to the insert mounting seat, wherein the cutting insert clamp wedge member described above is used as the cutting insert clamping wedge member. It is characterized by using a wedge member for clamping.

  In order to clamp the cutting insert on the insert mounting seat of the tool body using the cutting insert clamping wedge member, one of the rake face and the seating surface facing the thickness direction of the cutting insert is brought into contact with the insert mounting seat. The clamp surface of the wedge body is in contact with the other of the rake face and the seating surface, and the wedge face of the wedge body is slid into the recess of the tool body, and a clamp screw is inserted and screwed into the through hole. Go. Thereby, the cutting insert is clamped in the thickness direction between the insert mounting seat and the clamp surface of the wedge body, and is fixed to the tool body.

  And in the wedge member for cutting insert clamp of the present invention, the wedge body is formed along the axial direction of the through hole, and is provided with a receiving surface that rises with respect to the clamp surface. Are arranged opposite to the side surface facing the direction perpendicular to the thickness direction of the cutting insert. That is, the protrusion amount of the cutting edge of the cutting insert can be set by setting the distance between the receiving surface of the wedge main body and the side surface of the cutting insert.

Therefore, for example, it is possible to set the cutting edge protrusion amount by polishing the receiving surface and directly contacting the side surface of the cutting insert. In this case, the cutting edge runout accuracy between the cutting inserts can be set. In addition to being improved, it is not necessary to provide a cutting edge run-out adjusting mechanism itself for adjusting the protruding amount of the cutting edge, and the structure of the tool can be simplified. Further, polishing the receiving surface of the cutting insert clamp wedge member is easier to handle and easier to manufacture than processing a tool body having a large outer shape.
Even when an adjustment mechanism (cutting blade deflection adjustment mechanism) that adjusts the distance between the receiving surface and the side surface of the cutting insert is provided, the adjustment mechanism can be provided in the wedge body, so that the structure of the tool body is complicated. There is no such thing as.

  Further, since the receiving surface is formed so as to be along the axial direction of the through hole, the distance between the side surface of the cutting insert and the receiving surface is prevented from fluctuating depending on the screwing amount of the clamp screw. Therefore, the protrusion amount of the cutting edge of the cutting insert can be set with high accuracy.

  In addition, since the cutting edge protrusion amount can be set accurately, not only the cutting edge runout accuracy between cutting inserts is improved and the finished surface accuracy of the work material is improved, but also chipping of the cutting edge and variation in wear amount are suppressed. Thus, the effect of extending the tool life can be obtained.

  Thus, according to the wedge member for cutting insert clamp of the present invention and the cutting edge exchange type cutting tool using the same, the cutting edge protrusion amount of the cutting insert can be accurately set without complicating the structure of the tool body. Thus, highly accurate and stable cutting can be performed.

  Further, in the wedge member for cutting insert clamp according to the present invention, the wedge main body is provided with an adjustment mechanism capable of adjusting a distance between the side surface facing the direction perpendicular to the thickness direction of the cutting insert and the receiving surface. It is good.

  In this case, the distance between the receiving surface of the wedge main body and the side surface of the cutting insert can be adjusted, and the protrusion amount of the cutting edge can be adjusted, so that the cutting edge runout accuracy is further improved.

  Further, in the wedge member for cutting insert clamp of the present invention, the adjustment mechanism includes a hole opening in the receiving surface, a pin member that is screwed into the hole and protrudes forward and backward from the receiving surface, It is good also as providing.

  In this case, the distance between the receiving surface of the wedge main body and the side surface of the cutting insert can be easily adjusted by adjusting the screwing amount of the pin member in contact with the side surface of the cutting insert into the hole.

  In the wedge member for cutting insert clamp of the present invention, the receiving surface may be formed in parallel to the axial direction of the through hole.

  In this case, since the receiving surface of the wedge main body is formed in parallel to the axial direction of the through hole, it is ensured that the distance between the side surface of the cutting insert and the receiving surface varies depending on the screwing amount of the clamp screw. Is prevented.

  According to the wedge member for cutting insert clamp and the cutting edge replaceable cutting tool of the present invention, the cutting edge protrusion amount of the cutting insert can be set with high accuracy without complicating the structure of the tool body, and highly accurate and stable cutting. It can be performed.

It is a front view which shows the blade-tip-exchange-type cutting tool provided with the wedge member for cutting insert clamp which concerns on 1st Embodiment of this invention. It is a side view which shows the blade-tip-exchange-type cutting tool provided with the wedge member for cutting insert clamp which concerns on 1st Embodiment of this invention. It is a perspective view which expands and shows the principal part of the blade-tip-exchange-type cutting tool provided with the wedge member for cutting insert clamps according to the first embodiment of the present invention. It is a perspective view which expands and shows the principal part of the blade-tip-exchange-type cutting tool provided with the wedge member for cutting insert clamps according to the first embodiment of the present invention. It is the (a) top view, (b) front view, and (c) bottom view which show the cutting insert clamp wedge member concerning a 1st embodiment of the present invention. It is the (a) left side view and (b) right side view which show the wedge member for cutting insert clamps concerning a 1st embodiment of the present invention. It is a front view which shows the blade-tip-exchange-type cutting tool provided with the wedge member for cutting insert clamp which concerns on 2nd Embodiment of this invention. It is a side view which shows the blade-tip-exchange-type cutting tool provided with the wedge member for cutting insert clamp which concerns on 2nd Embodiment of this invention. It is a perspective view which expands and shows the principal part of the blade-tip-exchange-type cutting tool provided with the wedge member for cutting insert clamp which concerns on 2nd Embodiment of this invention. It is a perspective view which expands and shows the principal part of the blade-tip-exchange-type cutting tool provided with the wedge member for cutting insert clamp which concerns on 2nd Embodiment of this invention. It is (a) top view, (b) front view, (c) bottom view which shows the wedge member for cutting insert clamps concerning 2nd Embodiment of this invention. It is the (a) left view which shows the wedge member for cutting insert clamps concerning 2nd Embodiment of this invention, (b) The right view.

(First embodiment)
Hereinafter, a cutting insert clamp wedge member (hereinafter, wedge member) 10 according to a first embodiment of the present invention and a blade-tip-exchangeable cutting tool 30 using the same will be described with reference to FIGS. 1 to 6.
The cutting edge replacement type cutting tool 30 of this embodiment performs milling on a work material made of a metal material or the like.

  As shown in FIG. 1 and FIG. 2, the blade-tip-exchange-type cutting tool 30 has a disk shape, and a tool main body 31 in which a plurality of insert mounting seats 32 are formed at intervals in the circumferential direction on the outer periphery of the tip. A cutting insert 1 that is detachably attached to the insert mounting seat 32 and a wedge member 10 that clamps and fixes the cutting insert 1 to the insert mounting seat 32 are provided.

  The tool body 31 is made of a steel material or the like and has a disk shape with the axis O as the center. A tool mounting hole 33 extending along the axis O is formed in the tool body 31 so as to penetrate the tool body 31. A pair of key grooves 35 extending radially outward from the opening edge of the tool mounting hole 33 are formed on the end surface 34 facing the base end side (upper side in FIG. 2) along the axis O direction in the tool body 31. 35 is formed. The tool main body 31 is fitted with a key member provided in a tool tip (not shown) of the main shaft tip of the key groove 35, 35 by a bolt member inserted into the tool mounting hole 33. Is rotated around the axis O in the tool rotation direction T, and is used for cutting of the work material.

  Further, at the end of the tool body 31 on the tip end side (the lower side in FIG. 2) along the direction of the axis O, the outer surface of the tool body 31 is notched and opened to the tip side and radially outward. A plurality of pockets 36 are formed at intervals in the circumferential direction.

  As shown in FIGS. 3 and 4, the insert mounting seat 32 is arranged adjacent to the rear side in the tool rotation direction T of the chip pocket 36, and is cut into a concave shape so as to correspond to the shape of the cutting insert 1. It is missing and formed. In the present embodiment, the insert mounting seat 32 has a quadrangular hole shape corresponding to the shape of the cutting insert 1 having a quadrangular plate shape. The insert mounting seat 32 is opened toward the rear side in the tool rotation direction T and the front end side of the tool body 31, and the seat surface 32 a facing the rear side in the tool rotation direction T is the rake face 2 of the cutting insert 1. It abuts on (one rake face 2 described later).

  Further, a recess 37 formed to accommodate the wedge member 10 is provided on the rear side of the insert mounting seat 32 in the tool rotation direction T. A plurality of recesses 37 are formed in the tip outer periphery of the tool body 31 at intervals in the circumferential direction, corresponding to the chip pocket 36 and the insert mounting seat 32 described above. The recess 37 is formed so as to be cut out from the outer peripheral portion of the tip end of the tool body 31 toward the base end side and radially inward (hereinafter referred to as the base end inner peripheral side).

  The recess 37 has a bottom surface 38 positioned on the proximal inner peripheral side of the tool main body 31, and extends from the distal outer peripheral surface of the tool main body 31 toward the bottom inner surface toward the base inner peripheral side. And a female screw hole (not shown) that is formed in the bottom surface 38 and extends in parallel to the wall surface 39.

  The wall surface 39 has a concave curved surface portion 39a extending toward the inner peripheral side of the base end, and a pair of flat surface portions that are arranged so as to sandwich the concave curved surface portion 39a from the radial direction of the tool body 31 and are formed in a planar shape. 39b.

And the direction which goes to the inner side (base end inner peripheral side) of the tool main body 31 along the axial direction of the said female screw hole of the recess 37 is the pushing direction of the wedge member 10 in this embodiment.
In the present embodiment, a set in which the tip pocket 36, the insert mounting seat 32, and the recess 37 are arranged in this order toward the rear side in the tool rotation direction T is spaced apart in the circumferential direction at the outer peripheral portion of the tip of the tool body 31. There are a plurality of open spaces.

  The cutting insert 1 has a polygonal plate shape, and a polygonal surface facing the thickness direction is a rake face 2. Further, the side surface of the cutting insert 1 that faces in the direction perpendicular to the thickness direction is a flank 3. A cutting edge 4 is formed on the outer peripheral edge of the rake face 2 so as to form an intersecting ridge line between the rake face 2 and the flank face (side face) 3.

  Specifically, the cutting insert 1 of the present embodiment has a rectangular plate shape, and the rake face 2 is formed in a rectangular surface shape. The cutting insert 1 is rotationally symmetric about the central axis of the rake face 2. Specifically, the cutting insert 1 is formed four times symmetrical (90 ° symmetrical) with respect to the central axis of the rake face 2. A cutting edge 4 is formed on each side forming the outer periphery of the rake face 2.

Moreover, the cutting insert 1 of this embodiment is formed with a pair of rake faces 2 on the front and back surfaces facing the thickness direction. This cutting insert 1 is a so-called negative insert formed so as to be front and back rotationally symmetric and having a flank 3 as a negative flank.
In a state where the cutting insert 1 is mounted on the insert mounting seat 32 of the tool main body 31, one of the rake faces 2 is disposed facing the front side in the tool rotation direction T and the insert attachment. The other rake face 2 is in contact with the seating surface 32a of the seat 32 and is disposed facing the rear side in the tool rotation direction T, and becomes a seating surface that comes into contact with a clamp surface 12 described later of the wedge member 10. .

  The wedge member 10 clamps and fixes the cutting insert 1 to the insert mounting seat 32 of the tool main body 31. The wedge member 10 is made of a plate-like or piece-like steel material or the like, and has a wedge main body 11 that is pushed into the recess 37 of the tool main body 31.

As shown in FIGS. 3 to 6, the wedge main body 11 is disposed so as to face the clamp surface 12 and the clamp surface 12 that is in contact with the seating surface facing the thickness direction of the cutting insert 1. The wedge surface 13 is formed so that the space between the wedge body 11 and the clamp surface 12 gradually decreases as it goes in the pushing direction of the wedge main body 11, and the through hole 14 that extends along the pushing direction and into which the clamp screw 5 is inserted. The receiving surface 15 is disposed opposite to the side surface 3 facing the direction perpendicular to the thickness direction of the cutting insert 1 and is formed along the axis C direction of the through hole 14 and rises with respect to the clamp surface 12. Is provided.
One of the axial C directions of the through hole 14 in the wedge main body 11 is the aforementioned pushing direction.

  The clamp surface 12 is formed so as to come into contact with a portion other than the outer peripheral edge (cut blade 4 portion) of the other rake surface 2 which is a seating surface of the cutting insert 1. In FIG. 5A, the clamp surface 12 of the present embodiment is formed in a substantially rectangular surface shape so as to correspond to the shape of the seating surface.

  As shown in FIG. 6A, the clamp surface 12 is inclined so as to gradually approach the axis C of the through-hole 14 as it goes in the pushing direction of the wedge main body 11 (left side in FIG. 6A). . As shown in FIGS. 3 and 4, the clamp surface 12 is arranged facing the front side in the tool rotation direction T in a state where the wedge member 10 is mounted in the recess 37.

  As shown in FIGS. 5B and 5C, the wedge surface 13 includes a convex curved surface portion 13 a extending in the direction of the axis C of the through hole 14, and the convex curved surface portion 13 a in the width direction (perpendicular to the axis C). And a pair of flat surface portions 13b formed in a planar shape. A cross section perpendicular to the axis C of the convex curved surface portion 13a has a convex arc shape. The wedge surface 13 is formed parallel to the direction of the axis C of the through hole 14.

  As shown in FIGS. 3 and 4, the wedge surface 13 is arranged facing the rear side in the tool rotation direction T in a state where the wedge member 10 is mounted in the recess 37. Further, in this state, the flat surface portion 13b of the wedge surface 13 and the flat surface portion 39b of the recess 37 are in contact with each other, and between the convex curved surface portion 13a of the wedge surface 13 and the concave curved surface portion 39a of the recess 37, A slight gap is provided.

  Female threads are provided on the inner peripheral surface of the through hole 14. As shown in FIG. 5B, the through hole 14 is formed so as to penetrate the wedge main body 11 in the axis C direction. As shown in FIGS. 3 and 4, the axial line C of the through hole 14 is on the proximal inner peripheral side (in the pushing direction) of the tool body 31 in a state where the wedge member 10 is mounted in the recess 37. It extends toward.

  As shown in FIGS. 5A and 5B, the receiving surface 15 is formed so as to rise perpendicularly to the clamping surface 12 from the end of the clamping surface 12 in the direction perpendicular to the axis C. . Specifically, a protrusion 16 is formed at the end of the wedge main body 11 in a direction perpendicular to the axis C so as to protrude from the clamp surface 12, and the surface of the protrusion 16 facing the clamp 12 side is The receiving surface 15 is formed. In the present embodiment, the receiving surface 15 is formed in parallel with the direction of the axis C of the through hole 14.

  As shown in FIGS. 3 and 4, in a state in which the wedge member 10 is mounted in the recess 37, the receiving surface 15 is on the tip side of the tool body 31 and radially inward (hereinafter referred to as the tip inner peripheral side). It is arranged facing.

  Further, the protrusion 16 of the wedge main body 11 is provided with an adjusting mechanism 17 capable of adjusting the distance between the receiving surface 15 and the side surface 3 of the cutting insert 1 disposed to face the receiving surface 15. The adjustment mechanism 17 has a hole 18 that opens to the receiving surface 15 and is internally threaded on the inner peripheral surface, and a pin member 19 that is screwed into the hole 18 and protrudes forward and backward from the receiving surface 15. And. An end portion of the pin member 19 that protrudes from the receiving surface 15 comes into contact with the side surface 3 of the cutting insert 1.

  As shown in FIGS. 6A and 6B, the hole 18 extends through the protruding portion 16 and is formed to open perpendicularly to the receiving surface 15. Further, as shown in FIG. 4, in the state where the wedge member 10 is mounted in the recess 37, the pin member 19 in the hole 18 can adjust the screwing amount from the outside in the radial direction of the tool body 31. It is said that.

  The clamp screw 5 has a pair of male screw portions at both end portions in the extending direction, and the male screw portion located at the end portion in the pushing direction is screwed into the female screw hole of the recess 37 and pushed in. A male screw portion located at the end opposite to the direction is screwed into the through hole 14 of the wedge member 10. By screwing the clamp screw 5, the wedge member 10 is pushed into the recess 37 in the pushing direction.

  The blade-tip-exchange-type cutting tool 30 having such a configuration is a so-called behind wedge type in which the wedge member 10 is disposed on the seating surface side (the rear side in the tool rotation direction T) facing the thickness direction of the cutting insert 1. It is a milling cutter.

  In order to clamp the cutting insert 1 on the insert mounting seat 32 of the tool body 31 using the wedge member 10 of the present embodiment described above, one of the pair of rake faces 2 facing the thickness direction of the cutting insert 1 is selected. In the state where the rake face 2 is brought into contact with the insert mounting seat 32 and the clamp face 12 of the wedge main body 11 is brought into contact with the seating surface which is the other rake face 2, the wedge face 13 of the wedge main body 11 is recessed 37. The clamp screw 5 is inserted and screwed into the through hole 14 while being in sliding contact with the wall surface 39. Accordingly, the cutting insert 1 is clamped in the thickness direction between the insert mounting seat 32 and the clamp surface 12 of the wedge main body 11 and is fixed to the tool main body 31.

  In the wedge member 10 of the present embodiment, the wedge main body 11 is provided with a receiving surface 15 that rises with respect to the clamp surface 12 while being formed along the axis C direction of the through hole 14. The receiving surface 15 is disposed opposite to the side surface 3 facing the direction perpendicular to the thickness direction of the cutting insert 1. That is, by setting the distance between the receiving surface 15 of the wedge main body 11 and the side surface 3 of the cutting insert 1, the protruding amount of the cutting blade 4 of the cutting insert 1 (mainly the protruding amount toward the tip side of the tool body 31) is set. It can be set.

Therefore, for example, the cutting edge protrusion amount can be set by polishing the receiving surface 15 and directly contacting the side surface 3 of the cutting insert 1. The blade runout accuracy (front runout accuracy) is enhanced, and it is not necessary to provide a cutting blade runout adjustment mechanism itself that adjusts the cutting edge protrusion amount, thereby simplifying the structure of the tool. Further, polishing the receiving surface 15 of the wedge member 10 is easy to handle and easy to manufacture as compared to processing the tool body 31 having a large outer shape.
Even in the case where an adjusting mechanism (cutting blade runout adjusting mechanism) 17 for adjusting the distance between the receiving surface 15 and the side surface 3 of the cutting insert 1 is provided as in the present embodiment, the adjusting mechanism 17 is used as the wedge main body 11. Therefore, the structure of the tool body 31 is not complicated. Here, when the adjustment mechanism 17 is provided, before the clamp screw 5 is tightened into the through hole 14 of the wedge body 11, the screw amount of the adjustment mechanism 17 (the female screw portion of the hole portion 18 and the male screw of the pin member 19 is set. It is preferable to adjust the distance between the receiving surface 15 of the wedge main body 11 and the side surface 3 of the cutting insert 1 by adjusting the relative screwing amount with the portion. That is, the clamp screw 5 is tightened from the state in which the distance between the receiving surface 15 and the side surface 3 is adjusted. As a result, the following effects can be reliably obtained.

  That is, since the receiving surface 15 is formed along the direction of the axis C of the through hole 14, the distance between the side surface 3 of the cutting insert 1 and the receiving surface 15 varies depending on the screwing amount of the clamp screw 5. It is prevented. Therefore, the protrusion amount of the cutting edge 4 of the cutting insert 1 can be set with high accuracy. The same effect can be obtained even when the receiving surface 15 is polished and directly brought into contact with the side surface 3 of the cutting insert 1 without providing the adjusting mechanism 17.

  Moreover, since the cutting edge protrusion amount can be set with high accuracy, not only the cutting edge runout accuracy between the cutting inserts 1 is improved and the finished surface accuracy of the work material is improved, but also the chipping of the cutting edge 4 and the variation in wear amount. Is suppressed, and the effect of extending the tool life is obtained.

  As described above, according to the wedge member 10 of the present embodiment and the cutting edge replacement type cutting tool 30 using the wedge member 10, the cutting edge protrusion amount of the cutting insert 1 can be accurately set without complicating the structure of the tool body 31. It is possible to perform highly accurate and stable cutting.

  Moreover, according to this embodiment, since the adjustment mechanism 17 is provided in the wedge main body 11, the distance between the receiving surface 15 of the wedge main body 11 and the side surface 3 of the cutting insert 1 can be adjusted as described above. In addition, the protruding amount of the cutting edge 4 can be adjusted, and the cutting edge runout accuracy is further improved.

  Further, according to the adjusting mechanism 17 of the present embodiment, the receiving surface 15 of the wedge main body 11 and the cutting surface can be cut by a simple operation of adjusting the screwing amount of the pin member 19 in contact with the side surface 3 of the cutting insert 1 into the hole 18. The distance from the side surface 3 of the insert 1 can be easily adjusted.

  Further, since the receiving surface 15 of the wedge main body 11 is formed in parallel to the direction of the axis C of the through hole 14, the distance between the side surface 3 of the cutting insert 1 and the receiving surface 15 varies depending on the screwing amount of the clamp screw 5. This is surely prevented.

(Second Embodiment)
Next, the wedge member 20 according to the second embodiment of the present invention and the blade-tip-exchange-type cutting tool 40 using the same will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the same member as above-mentioned embodiment, and the description is abbreviate | omitted.

  As shown in FIGS. 7 to 10, the cutting edge 40 of the present embodiment has a recess 37 disposed adjacent to the rear side in the tool rotation direction T of the tip pocket 36 in the tool body 31. The insert mounting seat 32 is disposed behind the recess 37 in the tool rotation direction T. That is, in this embodiment, a set in which the tip pocket 36, the recess 37, and the insert mounting seat 32 are arranged in this order toward the rear side in the tool rotation direction T is arranged in the circumferential direction on the outer periphery of the tip of the tool body 31. A plurality are provided at intervals.

  9 and 10, the insert mounting seat 32 is opened toward the front side in the tool rotation direction T and the front end side of the tool main body 31, and a seat surface 32a facing the front side in the tool rotation direction T is The cutting insert 1 is brought into contact with the seating surface (the other rake surface 2).

  The recess 37 has a bottom surface 38 positioned on the proximal inner peripheral side of the tool body 31, a proximal end inner peripheral side from the distal outer peripheral surface of the tool body 31 toward the bottom surface 38, and a rear side in the tool rotation direction T. And a female screw hole (not shown) that is formed in the bottom surface 38 and extends in parallel to the wall surface 39. In the present embodiment, the wall surface 39 is formed in a rectangular plane.

  Further, in the state where the cutting insert 1 is mounted on the insert mounting seat 32, one of the rake faces 2 is arranged facing the front side in the tool rotation direction T and the wedge member 20. The other rake face 2 that is in contact with the clamp surface 12 is arranged to face the rear side in the tool rotation direction T and serves as a seating surface that comes into contact with the seat surface 32a of the insert mounting seat 32.

  As shown in FIGS. 9 to 12, the clamp surface 12 of the wedge main body 11 of the wedge member 20 is brought into contact with the rake face 2 (one rake face 2) facing the thickness direction of the cutting insert 1.

  The clamp surface 12 is formed so as to abut on a portion other than the outer peripheral edge (the cutting blade 4 portion) of the one rake face 2 of the cutting insert 1. In FIG.11 (c), the clamp surface 12 of this embodiment is formed in the substantially square surface shape so as to correspond to the shape of the said one rake face 2.

  As shown in FIG. 12A, the clamp surface 12 is inclined so as to gradually approach the axis C of the through hole 14 as it goes in the pushing direction of the wedge main body 11 (left side in FIG. 12A). . As shown in FIGS. 9 and 10, the clamp surface 12 is disposed facing the rear side in the tool rotation direction T in a state where the wedge member 20 is mounted in the recess 37.

  As shown in FIGS. 11A and 11B, the wedge surface 13 of the present embodiment is formed in a rectangular plane. The wedge surface 13 is formed parallel to the direction of the axis C of the through hole 14.

  As shown in FIGS. 9 and 10, the wedge surface 13 is arranged facing the front side in the tool rotation direction T in a state where the wedge member 20 is mounted in the recess 37. In this state, the wall surface 39 of the recess 37 and the wedge surface 13 are in contact with each other.

  Further, of the outer surface of the wedge main body 11 of the present embodiment, the surface facing the opposite side to the pushing direction (the right side in FIG. 12A) is formed in a concave curved surface shape corresponding to the inner surface shape of the chip pocket 36. ing. Thereby, in the wedge member 20, the surface which faces the front-end | tip outer periphery side and the inner surface of the chip pocket 36 are formed smoothly and continuously in a concave shape, and chip dischargeability is ensured.

  The blade-tip-exchangeable cutting tool 40 having such a configuration is a so-called front wedge method in which the wedge member 20 is disposed on the rake face 2 side (front side in the tool rotation direction T) facing the thickness direction of the cutting insert 1. This is a milling cutter.

  Also in the wedge member 20 of this embodiment and the blade-tip-exchange-type cutting tool 40 using this, the same effect as the above-mentioned embodiment is acquired.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

  For example, in the above-described embodiment, the wedge main body 11 is provided with the adjustment mechanism 17 that can adjust the distance between the side surface of the cutting insert 1 and the receiving surface 15, but the adjustment mechanism 17 is provided. It does not have to be. That is, as described above, by polishing the receiving surface 15, the pressing amount against the side surface 3 of the cutting insert 1 may be adjusted and the cutting edge protrusion amount may be set. In this case, the cutting edge runout accuracy may be set. However, it is preferable because the structure becomes simple and the number of parts can be reduced.

  Moreover, although the cutting insert 1 has comprised the square plate shape, it is not limited to this, Polygon plate shape other than a square plate shape, circular plate shape, etc. may be sufficient.

  In addition, the cutting insert 1 is formed with a pair of rake faces 2 on the front and back surfaces facing the thickness direction, but is not limited thereto. That is, the rake face 2 may be formed on only one of the front and back faces facing the thickness direction of the cutting insert 1. In this case, the surface of the cutting insert 1 that faces away from the rake face 2 is the seating surface.

1 Cutting insert 2 Rake face 3 Flank (side)
4 Cutting blade 5 Clamp screw 10, 20 Wedge member (Wedge member for cutting insert clamp)
DESCRIPTION OF SYMBOLS 11 Wedge body 12 Clamp surface 13 Wedge surface 14 Through-hole 15 Receiving surface 17 Adjustment mechanism 18 Hole part 19 Pin member 30, 40 Blade-replaceable cutting tool 31 Tool body 32 Insert mounting seat 37 Recess C Cylinder axis of through-hole

Claims (5)

A cutting insert clamping wedge member that clamps and fixes a cutting insert having a plate shape and having a cutting edge on the outer peripheral edge of the rake face facing the thickness direction to an insert mounting seat formed on the tool body,
In the wedge body pushed into the recess of the tool body,
A clamping surface that is in contact with a rake face or seating surface facing the thickness direction of the cutting insert;
A wedge surface that is arranged so as to face away from the clamp surface, and that is formed so that a distance between the clamp surface and the wedge surface gradually decreases as it goes in a pushing direction of the wedge body;
A through hole extending along the pushing direction and into which a clamp screw is inserted;
A receiving surface that is disposed opposite to a side surface that faces a direction perpendicular to the thickness direction of the cutting insert, is formed along the axial direction of the through-hole, and rises with respect to the clamp surface. A wedge member for a cutting insert clamp. A wedge member for a cutting insert clamp according to claim 1,
A wedge member for a cutting insert clamp, wherein the wedge body is provided with an adjusting mechanism capable of adjusting a distance between a side surface facing a direction perpendicular to a thickness direction of the cutting insert and the receiving surface. The wedge member for cutting insert clamp according to claim 2,
The adjustment mechanism is
A hole opening in the receiving surface;
A wedge member for a cutting insert clamp, comprising: a pin member that is screwed into the hole portion and protrudes forward and backward from the receiving surface. A wedge member for a cutting insert clamp according to any one of claims 1 to 3,
The wedge member for a cutting insert clamp, wherein the receiving surface is formed in parallel to the axial direction of the through hole. Formed in a disc shape, a tool body in which a plurality of insert mounting seats are formed on the outer periphery of the tip thereof at intervals in the circumferential direction, a cutting insert that is detachably attached to the insert mounting seat, and an insert mounting seat A cutting insert clamping wedge member that clamps and fixes the cutting insert against the cutting edge exchangeable cutting tool,
5. A cutting edge replaceable cutting tool using the cutting insert clamp wedge member according to any one of claims 1 to 4 as the cutting insert clamp wedge member.

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