JP2505355Y2 - Slow away tip - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a throw-away tip that forms a blade portion of a cutting tool, and particularly to a model, a template, or an actual object to be cut into the same shape as this. It is related to a throw-away tip for copying that cuts an object.

[Prior Art] Conventionally, the throw-away tip has been designed to cut the cutting into appropriately sized pieces or curl in a spiral shape so that the chips generated during cutting do not interfere with the cutting work. , The chip breaker groove is provided on the rake face.

For example, in Japanese Utility Model Laid-Open No. 61-20204, FIG.
As shown in FIG. 12, on the rake face 101, a flat chip boss portion 110 in which a clamp hole 111 for fastening to a shank or body of a cutting tool is formed, a land provided along a wavy cutting edge 121. There is described a triangular throw-away tip 100 provided with a tip breaker groove 130 provided along the land 120 and the land 120.

The land 120 has a slope down to the chip boss 110.
122 are formed. Also, the chip breaker groove 130
A first slope 131, a second slope 132, and a third slope 13 having a predetermined inclination angle from the land 120 toward the chip boss portion 110.
3 to form a first bottom surface 134 and a second bottom surface 13 between them.
It is serially installed at 5.

Further, the chip boss portion 110 and the chip breaker groove 130.
On the third slope 133 of the land 120, the protrusions 112 and 136 protruding toward the nose portion 123 of the land 120 and the straight portion 1 of the land 120.
A plurality of protrusions 113 and 137 protruding toward 24 are formed.

[Problems to be solved by the invention] However, the conventional throw-away tip 10 having the above configuration
At 0, the chip breaker groove 130 has the first slope 131, the second slope 132, the third slope 133, the first bottom surface 134 and the second bottom surface 1.
Since it is composed of 35, it does not curl the chip smoothly in a spiral shape or cut it into pieces of appropriate size, so the chips are not discharged smoothly and entangled with the cutting tool or the work piece. However, there is a problem that it takes a lot of time to remove it and the object to be cut is damaged.

The object of the present invention is to cut chips into appropriately sized pieces in longitudinal cutting or pulling cutting with low resistance,
An object is to provide a throw-away tip that can be curled in a spiral shape. Another object is to provide a throw-away tip capable of smoothly discharging chips.

[Means for Solving the Problem] The invention according to claim 1 is characterized in that a rake face having a substantially triangular shape is provided with 3
A wavy cutting edge that is provided at a location and comes into contact with the workpiece,
Lands provided along each of the three cutting edge ridges and having a plurality of wavy portions, and provided at three locations along the plurality of wavy portions of the land, the first slope on the land side, and the land side. A first breaker groove portion having a first curvature surface formed on the opposite side, a second slope surface gentler than the first slope surface on the land side, and a first curvature surface larger than the first curvature surface on the side facing the land side. 2nd with 2 curvature surfaces
While being formed in a wavy shape by alternately repeating breaker groove portions, when the contact width between the cutting edge and the cutting edge at the time of end face pulling up of the cutting edge is 2.0 mm or more, the cutting edge edge and the A chip breaker groove that increases the rigidity of the chips together with the land to hinder the stretchability and cuts the chips into finely cut chip pieces, and in the vicinity of the end of the chip breaker groove,
In addition, it is provided on the approximately bisector of the cutting edge and is raised from the end of the chip breaker groove, and the contact width between the cutting edge and the cutting edge when pulling up the end surface of the cutting edge. Is 1.0 mm or more and 2.0 mm or less, the ridge is curled in a spiral shape, and three ridges having side surfaces for cutting the chip, between the end of the land and the ridge, and the cutting blade are provided. It is provided on the bisector of the ridge, and the bottom surface is lower than the end portion of the land and the raised portion,
When the contact width between the cutting object and the cutting edge is 0.5 mm or more and 1.0 mm or less when pulling up the end surface of the cutting object, the chips are curled in a spiral shape and have a curved surface for cutting the chips 3
Adopted technical means with two spherical recesses.

According to the second aspect of the invention, the rake face having a substantially triangular shape is provided with 3
A wavy cutting edge that is provided at a location and comes into contact with the workpiece,
Lands provided along each of the three cutting edge ridges and having a plurality of wavy portions, and provided at three locations along the plurality of wavy portions of the land, the first slope on the land side, and the land side. A first breaker groove portion having a first curvature surface formed on the opposite side, a second slope surface gentler than the first slope surface on the land side, and a first curvature surface larger than the first curvature surface on the side facing the land side. 2nd with 2 curvature surfaces
While being formed in a wavy shape by alternately repeating the breaker groove portion, when the cutting depth to the workpiece during outer diameter cutting of the workpiece is 2.0 mm or more, chips together with the cutting edge and the land Is provided in the vicinity of the end of the chip breaker groove and on the approximately bisector of the cutting edge to increase the rigidity of the chip to prevent stretchability and cut the chip into finely cut chips. , The tip breaker is raised from the end of the groove, the depth of cut into the work piece is 1.0 mm or more and 2.0 mm during the outer diameter cutting of the work piece.
In the following case, the chips are curled in a spiral shape, and three ridges having side surfaces for cutting the chips, between the end of the land and the ridge, and approximately two halves of the cutting edge are provided. Provided on a line, the bottom surface is dropped from the end of the land and the raised portion, and when the cutting depth to the object to be cut during outer diameter cutting of the object to be cut is 0.5 mm or more and 1.0 mm or less, A technical means was adopted which curls the chips in a spiral and comprises three spherical recesses with curved surfaces for cutting the chips.

[Operation] According to the invention of claim 1 or 2, when the contact width between the work and the cutting edge is 2.0 mm or more during the end surface finishing of the work, or outside the work. When the depth of cut into the work piece during diameter cutting is 2.0 mm or more, a wavy cutting edge formed by alternately repeating a convex arc and a concave arc, provided along this cutting edge. A land,
Also, due to the wavy chip breaker groove formed by the plurality of first and second breaker groove portions provided along the plurality of wavy portions of this land, the chips discharged from the object to be cut have a curvature similar to these shapes. Is molded as. For this reason, the chips discharged from the object to be cut have an increased rigidity, which hinders the extensibility and facilitates cutting. Further, since the slope is formed on the land side of the chip breaker groove and the curved surface is formed on the side facing the land side, the chips are curled smoothly in a spiral shape with low resistance. Since the curled chips are easily cut by the cutting edge and the breaker groove as described above, the curled chips are cut into finely cut chips at the same time when they leave the curved surface.

And, when the contact width of the cutting edge and the cutting edge is 1.0 mm or more and 2.0 mm or less during the end surface finishing of the cutting object, or the depth of cut into the cutting object during the outer diameter cutting of the cutting object If it is 1.0 mm or more and 2.0 mm or less, the chips discharged from the work piece hit the side surface of the ridge, are curled in a spiral shape, and leave the side surface of the ridge, and at the same time, they are separated into finely cut chips. Is cut off.

And, when the contact width of the cutting edge and the cutting edge is 0.5 mm or more and 1.0 mm or less during the end surface finishing of the cutting object, or the cutting depth into the cutting object during the outer diameter cutting of the cutting object In the case of 0.5 mm or more and 1.0 mm or less, the chips discharged from the work piece are curled in a spiral shape on the curvature surface of the spherical recess, and at the same time they leave the curvature surface of the spherical recess and are shredded finely. It becomes a chip and is cut.

[Advantages of the Invention] The invention according to claim 1 or claim 2 provides the contact width between the object to be cut and the edge of the cutting edge at the time of finishing the end surface of the object to be cut, or When cutting the outer diameter of a cut object, regardless of the depth of cut into the work piece, it is possible to process finely cut chips with low resistance. Entanglement can be prevented and scratches on the work can be prevented, so the quality of the work can be improved and there is no risk of injuring the operator, and it is also safe. Has excellent effect.

[Embodiment] An embodiment of the throw-away tip of the present invention will be described with reference to the drawings.

1 and 2 show a throw-away tip adopting an embodiment of the present invention.

Reference numeral 1 designates a predetermined shape (in this embodiment,) made of a heat-resistant and wear-resistant material such as cermet (sintered product mainly composed of titanium carbide) or cemented carbide (sintered product mainly composed of tungsten carbide). The triangular throwaway tip formed in a triangular shape is shown. This throw-away tip 1 is a blade part of a cutting tool (bite) in which a flank surface 2 and a rake surface 3 intersect at right angles, and has the same shape as a model, a template or a real object to be cut. It is used as a throw-away insert for profiling.

The flank surface 2 is a flank surface for avoiding unnecessary contact with the finished surface of the object to be cut. In this embodiment, the flanks 2 are provided at three places.

The rake face 3 is provided in upper and lower two surfaces in a substantially triangular shape, and the land 5 is provided along the wavy cutting edge ridge 4, and the wavy chip breaker groove 6 is provided along the land 5.
A ridge 7 formed near both ends 31, 32 of the chip breaker groove 6, a spherical recess 8 formed between the land 5 and the ridge 7, and a chip boss surrounded by the chip breaker groove 6. A part 9 is provided.

The cutting edge 4 is provided at three places on the one rake face 3,
This is the part that comes into contact with the object to be cut.

The lands 5 are provided along the three cutting edge ridges 4 provided on the one rake face 3, respectively. The top surface of the corner portion 51 is formed at the same height as the top surface 53 of the wavy portion 52 of the land 5 and is located higher than the bottom surface 54 of the wavy portion 52 of the land 5. Further, three protuberances 7 and three spherical recesses 8 are provided in the vicinity of the three corner portions 51 as the ends of the land 5.

The chip breaker groove 6 is for cutting and curling chips generated when the object to be cut is cut. In the chip breaker groove 6, as shown in FIG. 3, in the AA cross section of FIG. 1, a slope 61 which is a first slope descending toward the chip boss portion 9 is formed on the land 5 side, and the chip boss portion 9 is formed.
On the side, a first breaker groove portion having a spherical concave portion 62 having a first curvature surface rising toward the chip boss portion 9 is provided. Also, in the chip breaker groove 6, in the BB cross section of FIG. 1, as shown in FIG. 4, an inclined surface 63 which is a second inclined surface gently lowering from the inclined surface 61 toward the chip boss portion 9 is formed on the land 5 side. And a curvature surface 64 that is a second curvature surface that gradually rises toward the tip boss portion 9 toward the tip boss portion 9.
And a second breaker groove portion formed with. And
In the chip breaker groove 6, slanted surfaces 61 and spherical concave portions 62, slanted surfaces 63 and curved surfaces 64 are alternately formed at predetermined intervals in the longitudinal direction (direction parallel to the land 5). Further, the slope 61 and the spherical recess 62 and the slope 63 and the curvature surface 64 are formed so as to be smoothly connected.

The present invention relates to a throw-away tip, and more particularly to a copy-away throw-away tip that follows a model, a template, or a real object to cut an object to be cut into the same shape. It is formed so that.

These wavy cutting edge 4, land 5 and chip breaker groove 6 make the chips of the cutting object wavy like these shapes when the cutting depth into the cutting object is 2.0 mm or more,
It increases the rigidity of the chips and hinders their stretchability, cutting the chips into finely chopped chips.

The ridge 7 is formed by the cutting edge ridges 4 which intersect as shown in FIG.
Is provided on the bisector of and is raised from the spherical recess 62 as the end of the chip breaker groove 6. Also, the raised portion 7
Of the land 5 is formed so as to be lower than the highest top surface of the land 5, that is, the top surface of the corner portion 51. This raised portion 7 has a cutting depth of 1.
At 0 mm to 2.0 mm, the chip hits the side surface 72, curls the chip spirally, and cuts the chip. Here, 73 is a hole formed in the manufacturing process when the raised portion 7 is formed.

The spherical recess 8 is provided on the bisector of the intersecting cutting edge 4 as shown in FIG. 5, and the bottom surface 81 has the top surface of the corner portion 51 of the land 5 and the top surface 71 of the raised portion 7. More depressed. This spherical recess 8 has a depth of cut into the object to be cut.
When the thickness is 0.5 mm to 1.0 mm, the chips are curled in a spiral shape on the curvature surface 82, and the chips are cut.

A clamp hole 91 for fastening the throw-away tip 1 to the shank of the bite or the body is formed substantially at the center of the tip boss portion 9. This chip boss 9
The top surface 92 of the ridge 7 is the top surface 71 of the raised portion 7 and the corner portion 51 of the land 5.
Is formed so as to be higher than the top surface and the top surface 53 of the wavy portion 52.

The operation of the throw-away tip 1 of this embodiment will be described with reference to the drawings.

Depending on the throw-away tip 1, the end surface pulling up of the work piece such as steel (the contact width between the work piece and the cutting edge 4 of the throw-away tip 1 is 2.0 mm or more) or outer diameter cutting (cutting depth 2.0 mm) By performing the above), the chips discharged from the object to be cut have the cutting edge ridges 4 and the chip breaker grooves 6 formed in a wavy shape, so that the chips of the object to be cut spill over the cutting edge edges 4 and the chip breaker grooves 6. When passing, it is shaped to have a curvature similar to the shapes of the cutting edge 4 and the chip breaker groove 6. For this reason, the rigidity of the chips increases, so that the extensibility thereof is hindered and the chips are easily cut.

Further, the chips discharged from the object to be cut enter the chip breaker groove 6 along the slopes 61 and 63 on the land 5 side, and the spherical recess 62 and the curved surface 64 on the chip boss 9 side reduce the resistance. It is curled smoothly in a spiral shape. As described above, since the curled chips are easily cut by the cutting edge 4 and the chip breaker groove 6, the curled chips are separated from the spherical concave portion 62 and the curved surface 64, and at the same time, the chip breaker groove 6 and the chip boss are separated. The chips are cut into fine pieces by the ridge line intersecting with the portion 9.

In addition, the throw-away tip 1 is used to finish the end surface of the workpiece such as steel (the contact width between the workpiece and the cutting edge 4 of the throw-away tip 1 is 1.0 mm to 2.0 mm) or the outer diameter cutting (cutting). Depth 1.0mm ~ 2.0mm)
The chips discharged from the object to be cut hit the side surface 72 of the raised portion 7 and are curled in a spiral shape to leave the side surface 72 of the raised portion 7 and, at the same time, are cut into finely cut chips. further,
End-face finishing of a workpiece such as steel with the throw-away tip 1 (the workpiece and the throw-away tip 1
When the contact width with the cutting edge 4 is 0.5 mm to 1.0 mm) or the outer diameter cutting process (cutting depth 0.5 mm to 1.0 mm) is performed, the chips discharged from the workpiece are spherical recesses 8 The curved surface 82 is curled in a spiral shape and leaves the curved surface 82 of the spherical concave portion 8 and is cut into finely cut chips at the same time.

That is, the throw-away tip 1 of the present embodiment can smoothly curl the chips discharged from the object to be cut into a spiral shape at the time of the end surface pulling process and the outer diameter cutting process of the object to be cut, and the thin chip Can be cut into shredded chips. Therefore, since it becomes possible to process finely cut chips, it is possible to prevent the chips from being entangled with the object to be cut, and to prevent damage to the object to be cut, so that the quality of the object to be cut can be improved. There is no danger of injuring the operator and it has an excellent effect on safety.

FIG. 6 shows a tooling diagram of the outer diameter cutting process and the end face pulling process, and FIG. 7 shows the chip treatment range in the outer diameter cutting process test. In FIG. 7, the solid line shows the present invention and the broken line shows the conventional effect.

The cutting conditions of the cutting tool are outer diameter cutting, cutting speed: v = 150 m / min, workpiece: SCM415 (H _B : 180), and dry cutting.

Next, Table 1 shows the measured values of the three-component force of the cutting resistance of the cutting tool with the throw-away tip of the present invention and the cutting tool with the conventional throw-away tip.

The measurement value of the three-component force of the cutting resistance was measured under the following cutting conditions.

Cutting conditions are: cutting speed: v = 100m / min, feed amount: s = 0.1m
m / rev, depth of cut: t = 0.5 mm, work piece: S10C, and dry cutting.

From FIG. 7, it can be confirmed that the present invention has a wider cutting processing range as compared with the conventional one for finish cutting with a small depth of cut into the object to be cut.

From Table 1, it can be confirmed that the cutting resistance of the cutting tool to which the throw-away tip 1 of the present embodiment is attached is lower than the cutting resistance of the cutting tool to which the conventional throw-away tip is attached. Therefore, it is possible to prevent the generation of cutting heat during cutting.

[Modification] Among the cutting processes, the cutting conditions for copying are not constant,
Depth of cut and feed amount change at any time. For this reason, in the chip breaker groove provided in the conventional throw-away chip shown in FIGS. 8 to 12, a cutting process in which chips cannot be processed occurs. Therefore, when cutting with a cutting tool equipped with this conventional throw-away tip, not only the chip pieces are entangled with the object to be cut and the object to be cut is damaged,
There was a risk of injury to the operator, and there was a problem with safety. However, since the cutting tool with a throw-away tip having the rake face structure of the present invention can process finely cut chips even under complicated cutting conditions such as copying, chip pieces can be cut. It is possible to prevent entanglement in the work, and to prevent damage to the work to improve the quality of the work, and there is no risk of injuring the worker at all. Has excellent effect.

[Brief description of drawings]

FIG. 1 is a front view showing a throw-away tip adopted in an embodiment of the present invention, FIG. 2 is a side view showing a throw-away tip adopted in an embodiment of the present invention, and FIG. 1 is a sectional view taken along the line AA, FIG. 4 is a sectional view taken along the line BB in FIG. 1, and FIG.
Figure is CC sectional view of Fig. 1, Fig. 6 is tooling diagram, 7th.
The figure is a graph showing the chip processing range in the outer diameter cutting test between the present invention and the conventional one. FIG. 8 is a front view showing a conventional throw-away tip, FIG. 9 is a side view showing a conventional throw-away tip, and FIG.
Figure is DD cross section of Figure 8, Figure 11 is EE cross section of Figure 8,
FIG. 12 is a sectional view taken along line FF in FIG. In the figure, 1 ... throw away tip, 3 ... rake face, 4 ...
Cutting edge, 5 ... Land, 6 ... Chip breaker groove, 7
...... Rise, 8 ... Spherical recess, 61 ... Slope (first slope), 62 ... Spherical recess (first curvature surface), 63 ... Slope (second slope), 64 ... Curve Surface (second curvature surface)

 ─────────────────────────────────────────────────── --Continued from the front page (56) References JP-A-62-39102 (JP, A) JP-A-48-52078 (JP, A) Actually opened 57-170907 (JP, U) Actually opened 61- 20204 (JP, U) Actually opened 54-64384 (JP, U) Actually opened 62-184904 (JP, U) Special public Sho 61-25483 (JP, B2)

Claims (2)

(57) [Scope of utility model registration request] 1. A plurality of (a) corrugated cutting edges which are provided on a substantially triangular rake face and which come into contact with an object to be cut, and (b) which are respectively provided along the three cutting edges. A land having a wavy portion, and (c) provided at three locations along the plurality of wavy portions of the land, a first slope is formed on the land side, and a first curvature surface is formed on the side facing the land side. A first breaker groove portion, a second slope surface that is gentler than the first slope surface on the land side, and a second curvature surface that is larger than the first curvature surface on the side facing the land side. While alternately and repeatedly formed in a wavy shape, when the contact width between the cutting edge and the cutting edge is 2.0 mm or more during end face pulling up of the cutting edge, together with the cutting edge and the land It increases the rigidity of the chips and hinders stretchability, A chip breaker groove for cutting the chip into finely cut chips, and (d) an end part of the chip breaker groove which is provided in the vicinity of the end part of the chip breaker groove and on the approximately bisector of the cutting edge. When the contact width between the cutting edge and the cutting edge is 1.0 mm or more and 2.0 mm or less when the end surface of the cutting object is pulled up, the chips are curled in a spiral shape and cut. (3) provided with three ridges having side faces, and (e) provided between the end of the land and the ridge, and on approximately the bisector of the cutting edge, and the bottom surface has the end of the land and the ridge; While falling from the raised portion, when the contact width between the cutting edge and the cutting edge is 0.5 mm or more and 1.0 mm or less when pulling the end surface of the cutting object, the chips are curled in a spiral shape and the chips are removed. 3 with a curved surface to cut
Throw-away tip with two spherical recesses. 2. A plurality of (a) corrugated cutting edges which are provided on a substantially triangular rake face and which come into contact with an object to be cut, and (b) which are respectively provided along each of the three cutting edges. A land having a wavy portion, and (c) provided at three locations along the plurality of wavy portions of the land, a first slope is formed on the land side, and a first curvature surface is formed on the side facing the land side. A first breaker groove portion, a second slope surface that is gentler than the first slope surface on the land side, and a second curvature surface that is larger than the first curvature surface on the side facing the land side. And is formed into a wavy shape alternately, and when the depth of cut into the work piece is 2.0 mm or more during outer diameter cutting of the work piece, the rigidity of the chips along with the cutting edge and the land To prevent the stretchability and finely cut chips. A chip breaker groove for cutting into the cut chip pieces, and (d) the chip breaker groove is provided in the vicinity of the end of the chip breaker groove and on the approximately bisector of the cutting edge, and protrudes from the end of the chip breaker groove. In addition, when the depth of cut into the work piece is 1.0 mm or more and 2.0 mm or less during the outer diameter cutting of the work piece, the chips are curled in a spiral shape, and there are three side surfaces that cut the chips. A raised portion, and (e) is provided between the end portion of the land and the raised portion and on the approximately bisector of the cutting edge, and the bottom surface is lower than the end portion of the land and the raised portion. In addition, when the depth of cut into the work is 0.5 mm or more and 1.0 mm or less when cutting the outer diameter of the work, the chips are curled in a spiral shape, and there are three curved surfaces that cut the chips. Throw-away tip with spherical recess.