JPS6399117A - Cutting tool - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates generally to plying tools and more particularly to rotary plying tool apparatus.

Such rotary milling tools are used to separate hard materials by cutting them, perhaps to make hard materials, especially metals. These rotary milling tools have a disc with a keyed hole in the center and an insert around the periphery.

Within the scope of this invention, the bayonet blade can be integral with the disc, or can be fixedly attached to the disc, such as by brazing, or the clamping can be done by a device that is normally attached to the disc. Can be removably installed. In general, relatively complex tightening devices have traditionally been used to restrain the insert into the seat on the disk due to shear and centrifugal forces. Such tightening requires equipment that is otherwise expensive;
The time-consuming process limits the number of blades that can be inserted into the disc.

Continuous disposal of chips generated during cutting operations is a problem that occurs during all cutting operations. However, the use of rotary milling tools with multiple inserts is problematic, for example due to the problems of chips produced by conventional inserts unless properly disposed of when they occur, in addition to the current problems with chips. Yes, the problem is complex. To aid in the process of chip removal and to minimize damage to the workpiece by chips, position the inserts so that each insert cuts only 7 parts of the total cutting width. is normal. For the same purpose, inserts with different widths produce narrower chips and also facilitate chip disposal.

The use of staggered inserts and inserts of different widths reduces the efficiency of the cutting operation. The use of distinctive inserts minimizes chip damage when rotating the workpiece and also helps solve chip disposal problems. However, when using inserts in tool holders, such inserts, if characterized, require greater tightening than inserts without features due to the additional forces created when forming narrow chips. Stop. The problem of chip disposal is further compounded by the need to tightly tighten the insert into the tool holder to overcome the centrifugal forces created by the rotational motion. There are many clamping devices available for retaining the bayonet. Tightening the device takes up space and therefore reduces the number of inserts that can be placed in the circumference of the disc. The tightening device requires fasteners that limit the narrowness of the disc, which is a problem when using tools for making narrow saws, such as saws.

The automatic retention of the insert into the tool holder is shown in the prior art. For example, US Patent No. 3! No. 11.23 shows a saw tooth placed in a circular saw without the holding device or clamping interfering with the device.

US Patent No. 3,7g! ;, No. 0.2/ specification shows a tool holder insertion blade having a tightening device in which the tightening member is tightened by the action of a spring force. However, none of the prior art patent specifications addresses the problem of effective fixed retention for featured elements in rotary slicing tools.

It is therefore an object of the present invention to provide a new rotary milling tool which substantially reduces or overcomes the problems and disadvantages mentioned above.

According to the invention, an improved rotary milling tool device includes a tool holder in the form of a disc, an insert around it, and an insert for making chips during cutting of grooves into the workpiece. It has a chip forming device in the insert blade.

In order to maximize the number of inserts around the milling tool, a novel feature of the insert allows the chips to be wound into a tight compact coil, thus leaving a minimum volume of air around the milling tool. occupy a place.

The rotary price tool in the preferred embodiment uses an insert that is restrained within the tool holder due to the geometry of the tool holder and insert, thus eliminating the need for special clamping equipment. The tool holder has a jaw-like seat for the insert whose contour of the seat matches the contour of the tool holder. moreover,
The seat may have a spring-like detent received in a recess made in the insert, so that when the insert is placed in the tool holder, the insert can be removed only by tools designed for that purpose. Place in place and remove. There is therefore no clamping device that requires a minimum thickness of the tool holder or occupies valuable void space around the milling tool.

The cutting element, that is, the insert blade, is characterized by making chips in a shape such that the width of the chips is smaller than the width of the cutting tip of the insert blade. It is placed on the cutting surface of the insert so as to create the shape of a chip, and takes the form of a ridge that forms that part. By creating the shape of the chips while the chips are most easily forged,
Use minimal force. The internal force applied to the chips will cause them to curve and form a tight spiral shape.

Additionally, the cutting surface of the insert is then placed on an angled chip guiding surface, and the clamping of the top of the insert removes and sets the insert from the surface.

A recess is formed in the tool holder between the inserts to receive the spiral chips. The starting point of the recess has the same angular path as the chip guiding portion of the insert to facilitate chip disposal during the cutting operation.

In order to make more inserts, the circumference of the unit of length is reduced by a circular plate, in order to reduce the strain due to the internal force created by pushing the insert into the seat of the tool holder. Place miso in a tool holder like this.

The operation and use of the invention relates to a rotary milling tool apparatus which will become more apparent from the description of a preferred embodiment of the invention with reference to the accompanying drawings. A rotary plying tool device is shown with a tool holder / in the form of a two-part disc, the disc having a recess 3 therein for receiving a second part, a disposable insert g. The insert blade g is generally made of hard metal.

Although a replaceable bayonet is illustrated for clarity, the rotary plying tool apparatus according to the present invention has an integral or permanently attached bayonet.

The tool holder is generally a relatively thin metal disc with a pair of separate surfaces giving the disc a thickness less than the width of the cut to be made by the insert gK. In the central part of the tool holder/ there is a hole 23 for installing the tool holder/ on the rotation axis. It is common to create a key groove 3 for keying the disk to the rotating shaft.

The seat 3 for the insert blade corresponds to the shape of the insert g. Seat 3
Above the chip receptacle there is a recess/7 for receiving chips, as will be explained further later in this specification.
Use Hollow/7. The cross-sectional shapes of the seating jaws a and 4Zb are shown as protruding in a V-shape in FIG. 2 and as being concave in a V-shape in FIG. There is a release recess at the end of each chamber 3. The key or tool /3 has a handle /q with a lever /6, which is inserted into the release recess B in order to push out the insert blade, which is held without tightening, from the tool holder.

A long, arcuate groove like a groove is made in the disc9, and the groove is located between the seats 3 around the disc and extends toward the central hole. The grooves perform various actions to compensate for the difference between internal forces and deformations created in the body of the tool holder during the cutting operation. The two grooves add elasticity to the disk and allow a large number of insertion blades to be seated in the tool holder.

A device is provided for positioning the inserts during the cutting operation and for preventing them from releasing in response to the centrifugal force acting on them. Furthermore, in particular the geometry of the bayonet and the seat retains the bayonet in the seat during operation, despite large forces on the bayonet. This geometric figure is a triangular prism or polyhedral restraint surface 1011.10b of the seat.
, //&.

//b (Figs. 2 and 3), and the restraining wedge bulges a, 5b, 7a, and 7b that match the bulges are roughly wedge-shaped. The insertion force causes the insertion blade to be inserted into the tool holder.
place it inside.

The forces acting on the insert placed in the rotary milling tool include the cutting force, the force acting to grip the insert, and the centrifugal force resulting from the rotational movement of the rotary milling tool. Since the cutting action with a rotary milling tool is intermittent, it is particularly important that the insert be securely restrained in its seat. The insert in this rotary milling tool is not restrained by an external clamp, but is instead held by a wedge force. When inserting the wedge-shaped insert between the seating jaws on the tool holder,
It also applies vertical force to these wedge-shaped jaws.

These vertically oriented forces create a frictional force that restrains the insert even after the force used to place the insert into its seat has been withdrawn.

It is known that the smaller the wedge angle α (FIG. 1), the greater the magnitude of the perpendicularly directed force for the same insertion force, and thus the greater the friction inhibiting force. So,
When decreasing the wedge angle α, the reliability of the holding of the bayonet increases as a result of the strong wedge force of the bayonet in the seat. However, vertically oriented forces create mechanical internal forces within the body of the tool holder that cause fracture, thus limiting the reduction in wedge angle. In the rotary plying tool device according to the present invention, it has been found that the range of optimality values for the wedge angle α (Fig. 1) is between 9° and 2°, and the actual optimality value is between the plying tool and the insert. It depends on the characteristics of the blade and the material from which it is made.

Instead of the above, the insert blade has a deterrent stopper 2'la,
Recessed to receive a restraining device such as 2gb, ko4tC, 25a, 2jb, 2! ;Has a device like c.

The geometry of the insert with the restraining surface and the tool holder thus allows the insert to be positioned independently of the magnitude of the cutting force.

To remove the insert, a force from the direction of the seat recess is required that is greater than the frictional retention force.

The restraint or recessed surfaces 10th, 10b are used when the insert is made of hard metal and when generating extra internal forces in the rotary milling tool device.
ib) has a unique advantage.

The insert will fail before the failure of the seat in the milling tool, thereby protecting the tool holder. The triangular prism shape also ensures the stability of the insert in the milling tool against lateral forces, especially when alternating the right-hand and left-hand inserts.

In the front part of the insert blade there is a cutting edge /2, followed by a chip forming device 13, which reduces the width (Fig. 7a) compared to the width of the cutting blade. It creates swarf, creates ridges that strengthen the swarf, and curves the swarf. Rib iga.

The ribs of insert blades such as /Sb start at a small distance from the cutting edge /2, thus creating chips while the chips are at high temperature for cutting action and therefore in the best malleable state.
This greatly reduces the energy used to make chips. The lip is placed on the chip, which creates an internal force on the chip that deforms it into a tight spiral shape.

As the helical shape of the chip grows, it moves along the face of the insert (to the deterrent surface/Oa4 or deterrent surface//
As shown in a, the helical shape of the chips moves upward along the angle part 2B between the top holding surface and the chip forming device /3. The guide surface acts as an extension of the second part and serves to facilitate the removal of chips from the work piece.

As shown in the drawing, the actual chip forming device /3 has two cutting ridges and also has lips /ga, /gb, 20 according to the embodiment shown in FIGS. 5-7.

For example, in FIG. 3, the chip forming device is defined by two raised lateral ribs /ga, /&bK (with a ridge 22 leading into the indentation). In FIG. The chips produced are illustrated in cross-section in FIG. 5a.

Figure 6 shows the raised central flat surface 2/a on each side of the lip.
, 21b and a chip forming device having a protruding portion 2. The chip formed by the chip forming device of FIG.
Illustrated in the figure.

FIG. 7 shows the entire chip forming device with a central lip 20 defined by flattened side ribs and two flat surfaces /9a, /9b. The chips produced by the chip forming apparatus of FIG. 7 are illustrated in FIG. 7a, which also depicts the workpiece to show the narrowness of the chips compared to the shavings in the workpiece. .

A general feature of the chip forming part of the insert blade is that the insert blade works to form chips immediately after cutting so that the chip width is narrower than the width of the cut groove.

゛Furthermore, the chips are transformed into a small coil.

Therefore, a rotary milling tool is provided which produces chips using a minimum of power by means of a rotary milling tool with a self-fixing insert.

Although the principles of the invention have been described in connection with particular devices and applications, it will be understood that this description is done by way of example only or as a limitation on the scope of the invention.

[Brief explanation of the drawing]

1 is a perspective view of a rotary milling tool device, and FIGS. 2 and 3 show a seat according to a different embodiment of the invention in which the seat has a recessed surface and a protruding surface and the insert has a matching surface. FIG. 4 is a perspective view of one embodiment of the release key; FIG. 3 is a perspective view of the insert featuring a pair of side ribs for chip formation; Figure 5a is a cross-sectional view of the chips showing the shape of the chips obtained, Figure 6 is a perspective view of a distinctive insert with a central raised rib that forms the chips, and Figure Aa is the resulting chip. A cross-sectional view of a chip illustrating the shape of the chip, FIG. 7 is a perspective view of an insert featuring a lateral lip and a central lip between them for chip formation, FIG.
The figure is a cross-sectional view of the chips illustrating the shape of the chips obtained, No. ga,
Figures gb and gc are front views of 7 parts of another embodiment of the seat device with a spring-like detent for retention purposes, No. 9a;
, 9b. Figure 9c is a perspective view of an insert according to the invention having a triangular prism recess for retention by a spring-like detent in the seat. In the figure, / is the tool holder, U is miso, 3 is the seat, 'I
a, '/b are jaws, 3a, 3b are wedge-shaped surfaces, O is a release depression, '7a, 7b are (wedge-shaped surfaces,
g is the insertion blade, 10a, 10b, //a, //b are the restraining surfaces, /2 is the cutting tip, /3 is the chip forming device, /da is)) control, /S is the key, / Otsu is lever, /7 is (bomi, /ga, /gb is rib,
/9 is a hollow, 20 is a rib, 2/a. Ωlb is a flat surface, 2.2 is a raised part, 23 is a hole 1.24Za, 2'lb, 2hiroC is a stopper, J
5 & . 23b and 23c are devices, and α is a wedge angle. Fig, 3 (Fig, 9C Procedure Neichi aE4!3 (voluntary) 6.7
1 1986 41] 6th 1″7, Mr. Komamochi Correction Agency Director
(1. Indication of the case 1986 Patent Application No. 52227 2. Name of the invention Cutting tool 3. Relationship with the person making the amendment , 34 Bussan Building Annex (59110261 1!I Correct Subject 11 Full Text of Specification 10 Correct Content 1) Amend the full text of the specification as shown in the attached sheet. Description 1 Name of Invention Cutting Tool 2, Scope of Claims l Insert A cutting surface is formed between the blade and the blade support that supports the insertion blade, and one side edge of the insertion blade is a cutting edge of the cutting edge, and a cutting surface is formed on the cutting surface during cutting. A chip forming means for shaping the chips is provided, a cutting land is provided between the cutting edge and the chip forming means,
The chip forming means is characterized in that it has at least one protrusion that is disposed between both edges of the cutting surface and extends from the cutting land in a direction away from the cutting edge. Tool. Y W1 The cutting tool according to claim 571, wherein the chip forming means has seven pairs of protrusions arranged at intervals on both sides of the protrusion. J. The insert blade. The cutting tool according to claim 1 or 2, wherein the seat is wedge-shaped and the seat is wedge-shaped into which the insertion blade is inserted. It consists of a tool and a number of blades attached to the periphery of the support, each blade has a cutting surface with one side edge being a straight cutting edge, and the cutting surface has a straight cutting edge. A chip shaping means is provided for shaping chips generated during cutting, a cutting land is provided between the cutting edge and the chip shaping means, and the chip shaping means moves away from the cutting edge. A rotary groove cutting tool having at least one protrusion extending from a cutting land in a direction. A rotary groove cutting tool according to claim 1, wherein the blade is additionally attached to the support.'Z The blade is attached to the support. A rotary groove cutting tool according to claim 1, wherein the rotary groove cutting tool is removably added to the tool, and the chip forming means has l pairs of protrusions facing each other at intervals. However, the rotary groove cutting tool according to any one of claims d to v. A rotary groove cutting tool according to any one of Items d to 3 of the scope of Patent B ¥4Z, which has the following: lQ ffQ chip forming means are arranged in pairs opposite to each other at intervals. The rotary groove cutting tool according to any one of claims 1 to 2, which has a protrusion and a central protrusion disposed between the protrusions. The rotary groove cutting tool according to any one of claims 1 to 10, which has a self-holding means for self-holding the tool. 12. The blade has a wedge shape, and the support tool The rotary groove cutting front ball ll according to claim y11, which is fitted into the wedge-shaped catch seat of /3. The wedge-shaped catch seat and the wedge-shaped blade body has concave and convex interlocking faces,
The drawing rotation type % type % III according to claim 172 The wedge angle of the wedge-shaped catch is 9° force 2
Claim No. 7.2 or i.
The rotary groove cutting tool according to item 3. 3 Detailed Description of the Invention The present invention relates to a cutting tool, and particularly to a blade thereof. Continuous disposal of chips generated during cutting operations is a problem that exists in all cutting operations. This problem becomes more problematic when using rotary cutting tools with multiple blades. because,
This is because, in addition to the current problem of chips, if they are not properly disposed of when they occur, there will be a problem of chips resulting from cutting by the preceding blade. To aid in the removal of chips and to minimize damage to the workpiece caused by chips, it is conventional to position the blades so that each blade cuts only 7 parts of the total chip width. It is publicly known. Blades with different cutting @ are used for similar purposes. These alternative methods reduce the width of the chips by the width of the cut
Facilitates disposal of chips. The use of zigzag delivery blades and blades of different widths reduces the overall efficiency of the cutting operation. The use of a distinctive blade minimizes chip damage when rotating the workpiece and helps solve chip disposal problems. However, if the cutting tool uses an insert, such an insert, if featured, will be more difficult to tear than a featureless insert due to the additional forces created when forming narrow chips. Requires heavy tightening. The problem of chip disposal becomes even more difficult due to the need to insert the blade firmly into the blade support so as to overcome the centrifugal force generated by the rotary movement 1. There are many clamping devices available for holding inserts. Tightening reduces the number of inserts that can be placed around the disc since the device occupies desk space. However, the tightening device requires a fastener to limit the thickness of the disc. This is a problem when a cutting tool is used for cutting narrow grooves, such as a hacksaw.It is therefore an object of the present invention to provide a novel cutting tool that substantially reduces or overcomes the problems and disadvantages mentioned above. Our goal is to provide the following. The present invention has a disc-shaped support, a plurality of blades around the support, and means on the blades for narrowing chips generated during crane cutting of a workpiece. , an improved cutting tool is provided. In order to maximize the number of blades on the blade support, the new features of the blade are such that the chips are wound in a tight compact coil so that the smallest area around the cutting tool is The amount will be charged to you. The blade body or insert is configured to shape the chips such that the width of the chips is smaller than the width of the cutting force edge of the insert. This configuration is 1! It is usually located on the cutting surface of the blade and forms part of it. Thereby, the chips immediately after being sheared by the straight cutting edge of the insert blade are shaped. Immediate force consumption is minimized by shaping the chips while they are most flexible. The internal force curls the chips into a tight spiral shape. Another object of the present invention is to provide an insert blade for use in a stationary blade support as well as a rotating blade support. The insert blade is characterized in that it controls the shape of the chips by a protrusion that is spaced from the cutting edge and extends in the longitudinal direction between both edges of the upper cutting surface of the insert blade. A recess is formed between the inserts of the blade support to receive the spiral chips. In order to facilitate the disposal of chips during cutting operations, the starting point of the recess is designed to reduce the inward distortion that occurs when the insert blade moves in and out of the socket of the insert blade support. In order to attach a large number of insertion blades around the blade, a long hole is provided in the disc-shaped blade skin holder. Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings. The present invention relates to a cutting tool for cutting grooves or dividing materials. The cutting tool of the present invention consists of two parts, namely, a disposable insert blade g and a concave catch seat 3 for inserting the insert blade gfce.
It has a disc-shaped blade body holder l. The insert blade 3 is
Usually made of hard gold. Although a replaceable insert is shown, the present invention also encompasses those with integral or permanently attached blades. The blade support l is usually a relatively thin fully bent disc,
It has a thickness slightly larger than the width of the cutting groove formed by the insertion blade S. The medium-heat portion of the blade support 1 has a hole 23 for attaching the blade support to a rotating shaft. Although not shown in the drawings, this hole 2.7 is provided with a key for locking the blade support to the rotating shaft. The catch 3 for the insert blade corresponds to the curved shape of the insert blade g; above the catch 3 there is a recess 17 for receiving chips, as will be described later, in order to accommodate all the chips. used for. The cut cross-sections of the catch jaws a and 4tb are shown as protruding in a V-shape in the νλ figure, and as being concave in a V-shape in the third figure. At the inner end of each seat 3 there is a recess 6 for removal. The removal tool A/s is used to insert the lever 76 and the handle lever into the recess 6 and push out the insert blade not held by the t1 clasp from the blade support. The disk constituting the blade support is formed with an elongated arcuate hole, for example a hole located between the seats 3 on the periphery of the disk and extending towards the central hole -J. The groove acts to compensate for the difference between internal forces and deformation that occur in the cutter body during cutting operations. The sieve also increases the elasticity of the disk and allows the insert to better seat the disk. During the cutting operation, a device is provided for locking the inserts in position and preventing them from being released in response to centrifugal forces acting on them. That is, due to the geometry of the insert and the seat, the insert is retained in the seat during use, despite large forces acting on the insert. This geometric shape is such that each triangular prism of the catch has a polyhedral holding surface loa, 10b, tth, tlb (W, x,
Figure 3] and the corresponding restraining wedge swelling surface jlL, jb,
It forms a wedge shape with ri a and ri b. The insertion blade is positioned in the seat 3 of the blade support by the insertion force. A cutting force, a force for gripping the insert, and a centrifugal force resulting from the rotational movement of the rotary cutting tool act on the insert attached to the rotary blade support. Since the cutting action of a rotary cutting tool is intermittent, it is extremely important to securely hold the insert blade in the 70 catch seat! It is essential. The insert blade of this rotary cutting tool is not held by a clasp, but is instead held by a wedge force. When the wedge-shaped insertion blade is inserted between the blade support and the wedge-shaped catch jaws of the blade support, a force is applied perpendicularly to the catch jaws. These vertical forces create a frictional force, and the pH frictional force holds the insert blade within the seat. The smaller the wedge angle α (Fig. ν1) becomes, the greater the vertical force for the same insertion force, t fi
? It is well known that holding power increases. Therefore, when the wedge angle α is made small, a strong wedge force of the sea M acts on the insert blade in the catch, increasing the reliability of holding the insert blade. However, the reduction in wedge angle is limited. Otherwise, the vertical force will generate mechanical stress on the blade support, causing damage to the blade support. In the rotary cutting tool according to the invention, the optimum value range of the wedge angle α (FIG. 7) is 9° - 0. The actual optimum value depends on the properties of the materials from which the blade support and insert are made. In another embodiment, the insertion blade has a holding detent a9.
．． Means such as Kuhomikoja, 2jbt2jc, which accept Hoya means such as 2hiro'b, 2*c, are formed. Therefore, the geometry of the insert with the restraining surface and the blade support allows the insert to be positioned independently of the magnitude of the cutting force. In order to remove the insertion blade, a force greater than the frictional holding force from the direction of the catch is required. Concave surfaces 10a, 10b are useful when the insert is made of hard metal, and convex surfaces are also useful if excessive stresses occur in the blade support. This is because the insertion blade destroys the blade support before the seat of the blade support is destroyed, thereby protecting the blade support. By changing the prismatic shape of the insert (in case the right insert and the left insert are used alternately), the stability of the insert with respect to the side inserts is improved. The curved part of the insert blade has a cutting edge l, followed by a chip forming means 13. The chip shaping means 13 shapes the chips so that the width of the chips is narrower than the width of the cutting groove (Fig. 7a), (1) hardens the chips, and (2) curls the chips. The protrusions on the insert blade, such as /Ha, /gb, start a little distance from the cutting blade. Additionally, the energy consumed in shaping the chips can be significantly reduced because the chips are formed while they are still hot and flexible due to the cutting action. Furthermore, the arrangement of the protrusions flrK generates an internal force in the chips, which deforms them into a tight spiral shape. As the chip spiral grows, it moves along the surface of the insert blade, specifically between the chip forming part/J and the upper holding surface (for example, tO
a, tlh). The concave surface acts as an extension of the inclined guide roller as the chip helix moves, facilitating removal of the chip from the workpiece. The cutting powder forming portion 13 is a cutting land knee and protrusions /ga, /gb as illustrated in FIGS. 5 to 7. It has 20'ff. For example, the chip forming section of FIG. S has a cutting land that continues into a recess L de defined by two side protrusions / g a * / g b. The figure 5a of the body is a cross-sectional view of chips formed by the chip forming section of FIG. 5. Figure υ16 shows the central ridge; 0 and the flat surfaces j/a on both sides of it.
, 2/b, which shows a chip forming part having a cutting land continuing to 2/b, shows a cross section of chips formed continuously by the chip forming part of FIG. 6. FIG. 7 shows two flat surfaces /qa, /? defined by a central protrusion 20 and spaced apart side protrusions. b shows the chip forming part with 2. Fig. 7a shows the chip formed continuously by the chip forming part of the building plan and the width of the groove of the workpiece. A common feature of the chip forming portion of the insert blade is that the chip is molded after the cutting W to make the chip narrower than the width of the cutting groove. The chips transform into tight coils. Although the principles of the invention have been described in connection with particular devices and applications, this description is intended to be illustrative and not intended to limit the scope of the invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of a rotary cutting tool, Figs. Fig. 5 is a perspective view of an insert blade with all of the protrusions of the pair for forming chips, %: 31 Fig. 5 shows chips formed by cutting with the insert blade of Fig. rs. Fig. 6 is a perspective view of an insert blade with a central protrusion for forming chips, and Fisa Fig. is a cross-sectional view of chips formed by the insert blade in Fig. 6. Fig. 7 is a perspective view of an insert blade having l pairs of side g!8 ridges for chip forming and a central ridge between them, and Fig. 7a is a cut-forming blade formed by the insert blade of Fig. 7. The cross-sectional view of the cutting chips, Figure 1/#'gb, and Figure tFffc are respectively a perspective view of the catch seat equipped with a spring-like return stop for holding the insert blade, and Figure 9.
Figures a-j, b, and 190 are perspective views of an insert according to the present invention having a multifaceted recess in which the blade is held by a spring-like rest stop in the seat. l: Blade support, 3: catch seat, 6: removal hole, g: insert blade, /ga, /gb: side protrusion, =0: center protrusion, co/a, co/b: flat Surface, C, 2: Cutting land 1.2<t
a, 2u't+tColIc: Return stop, α: Wedge angle.

Claims (1)

[Claims] 1. Consisting of an insert blade and a blade support that supports the insert blade, the blade support is provided with a seat that fits and holds the insert blade, and the insert blade has one edge thereof. A cutting surface having a straight edge is formed, and a chip forming means for forming chips generated during cutting is provided on the cutting surface, and between the cutting blade and the chip forming means. A land surface is provided, and the chip forming means has at least one protrusion disposed between both side edges of the cutting edge and extending from the land surface in a direction away from the cutting edge. cutting tools. 2. The cutting tool according to claim 1, wherein the chip forming means has a pair of protrusions spaced apart from each other on both sides of the protrusion.