CN115106584A - Cutting insert and cutting tool - Google Patents
Cutting insert and cutting tool Download PDFInfo
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- CN115106584A CN115106584A CN202110308460.0A CN202110308460A CN115106584A CN 115106584 A CN115106584 A CN 115106584A CN 202110308460 A CN202110308460 A CN 202110308460A CN 115106584 A CN115106584 A CN 115106584A
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- edge
- corner
- cutting insert
- front corner
- chip
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/02—Milling-cutters characterised by the shape of the cutter
- B23C5/08—Disc-type cutters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/16—Milling-cutters characterised by physical features other than shape
- B23C5/20—Milling-cutters characterised by physical features other than shape with removable cutter bits or teeth or cutting inserts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/16—Milling-cutters characterised by physical features other than shape
- B23C5/20—Milling-cutters characterised by physical features other than shape with removable cutter bits or teeth or cutting inserts
- B23C5/22—Securing arrangements for bits or teeth or cutting inserts
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling Processes (AREA)
Abstract
The invention provides a cutting insert and a cutting tool. The cutting insert has a first surface in the shape of a rotationally symmetric polygon, a second surface located on the opposite side of the first surface, an outer peripheral surface located between the first surface and the second surface, and a central axis passing through the centers of the first surface and the second surface; the first surface comprises a first edge, a first corner, a second corner, a front corner surface arranged along the first edge, a chip removal groove surface arranged along the front corner surface, and a constraint surface arranged along the front corner surface and the chip removal groove surface; the first edge comprises a first edge part, a second edge part and a transition edge part; the front corner face comprises a first front corner face arranged along the first edge part, a second front corner face arranged along the second edge part and a third front corner face arranged along the transition edge part; the chip removal groove face is far away from the second surface along with being far away from the front corner face, and the chip removal groove face is connected with the first front corner face and the third front corner face and is far away from the second front corner face. The invention can obtain good chip treatment effect and is beneficial to the reduction of the size of the blade.
Description
Technical Field
The invention relates to the field of cutters, in particular to a cutting blade and a cutting cutter.
Background
Chinese patent application CN105478873A discloses a cutting insert with an asymmetric cutting edge. The insert has two opposing surfaces and four peripheral side surfaces, the two opposing surfaces and the four peripheral side surfaces respectively forming four cutting edges, each cutting edge being divided into a first portion, a second portion and a transition radius. The first part length L1 and the second part length L2 have L1 > L2, and the transition radius is not located at the middle point of the cutting edge. This solution solves the problem of increasing the height of the shoulder that can be used for cutting by the cutting insert.
However, in this solution, because the cutting performance of the insert needs to be ensured, the insert generally has a larger rake angle, and at the same time, a sufficiently large constrained surface for constraining and a rake angle surface for controlling chip removal are also required, and the space between the rake angle surface and the constrained surface is small, and the chip removal space is small, so the insert is generally large, the raw materials are used more, and the cost is high. Further, if the size of the insert is reduced by increasing the distance between the cutting edge and the restricted surface, the strength of the insert is likely to be reduced, and the molding is likely to be difficult.
Disclosure of Invention
An object of the present invention is to provide a cutting insert that achieves good chip disposal and facilitates reduction in the size of the insert.
Another object of the present invention is to provide a cutting tool having the cutting insert described above.
In order to solve the technical problems, the invention adopts the following technical scheme:
according to one aspect of the present invention, the present invention provides a cutting insert having:
a first surface in the shape of a rotationally symmetric polygon;
a second surface located on an opposite side of the first surface;
a peripheral surface between the first surface and the second surface; and
a central axis running through the center of the first surface and the center of the second surface;
the first surface includes:
a first edge;
a first corner connecting the first edge;
a second corner connecting the first edge;
a front corner surface disposed along the first edge and closer to the second surface as it moves away from the first edge;
a chip removal groove surface arranged along the front corner surface and away from the second surface with the distance from the front corner surface; and
a constrained surface disposed along the front corner surface and the chip removal groove surface, closer to the second surface than the first edge, and perpendicular to the central axis;
the first edge includes:
a first edge portion extending from the first corner to the second corner and approaching the second surface as approaching the second corner;
a second blade portion extending linearly from the second corner toward the first corner and approaching the second surface as approaching the first corner; and
a transition edge portion connecting the first edge portion and the second edge portion and approaching the second surface as approaching the first corner;
the angle of inclination of the transition edge is greater than the angle of inclination of the second edge when the outer peripheral surface is viewed in elevation;
the front corner face includes:
a first rake surface disposed along the first blade portion;
a second rake surface disposed along the second blade portion; and
a third front corner surface disposed along the transition edge portion;
the chip removal groove face is connected first preceding angular surface with the third preceding angular surface, and keeps away from the second preceding angular surface.
In some embodiments, the chip ejection slot surface is closer to the second surface than the constrained surface.
In some embodiments, the chip ejection slot surface has a first end closest to the first corner and a second end closest to the second corner, the first end meeting the first front corner surface and the second end meeting the third front corner surface; the chip removal groove surface is provided with a most concave position which is closest to the second surface relative to the restraining surface, and the most concave position is positioned between the first end and the second end.
In some embodiments, the most recess is closer to the first corner than to where the first edge meets the transition edge in a direction extending along the first edge.
In some embodiments, when viewed from the direction of the constraint surface, a projection length of a distance from the first end to the second end in the extending direction of the first edge is L1, a projection length of a distance from the first end to the most concave portion in the extending direction of the first edge is L2, and L2/L1 is 1/2 to 2/3.
In some embodiments, the chip ejection slot surface and the plane of the restraining surface form an included angle α, and the included angle α at the first position is smaller than the included angle α at the second position when the chip ejection slot surface has a first position from the first end to the most concave position and a second position closer to the most concave position.
In some embodiments, at different positions between the first end and the second end, the range of variation of the included angle α is: 0 < alpha < 40.
In some embodiments, the rake face further comprises an extension face connected between the first rake face and the chip ejection slot face; the extension surface approaches the second surface with increasing distance from the first front corner surface in a direction toward the central axis.
In some embodiments, an included angle between the extending surface and the plane where the constraining surface is located is β, and at different positions of the extending surface along the extending direction of the first edge, the included angle β varies in a range of: 0 ° < β <35 °.
In some embodiments, the projection length of the chip discharging groove surface in the extending direction of the first edge is 1/7-1/3 of the side length of the first surface.
In some embodiments, the length of the first edge is greater than the length of the second edge.
According to another aspect of the invention, there is also provided a cutting tool comprising a shank and a cutting insert as described above mounted on the shank.
According to the technical scheme, the invention has at least the following advantages and positive effects: in the cutting blade, each edge part on the first edge is obliquely extended, so that the extension length of the edge part can be increased, and the processing performance of the blade is ensured. The constraint surface is concave to the second surface compared with the edge part on the first surface, so that a larger chip removal space can be arranged between the constraint surface and the edge part, and meanwhile, the first front angle surface can be ensured to have enough width and angle, so that the cutting performance of the blade is ensured, and chips are guided to be discharged. The chip generated along the first front corner surface can be blocked by the chip removal groove surface, so that the chip is enabled to be curled, and the chip is discharged outwards along the chip removal groove surface towards the blade, so that the chip is prevented from being scraped to the second edge part which does not participate in cutting on the same first edge, and the cutting edge is well protected. The chip is guided by the chip discharge groove, so that the chips are more convenient to discharge, the chip discharge space of the cutting blade is saved, the overall shape of the cutting blade can be reduced under the condition of ensuring the same shape of the cutting edge, the overall size of the cutting blade is reduced, the use amount of raw materials of the blade is reduced, and the cost is reduced.
Drawings
FIG. 1 is a schematic view of an embodiment of the cutting tool of the present invention.
Fig. 2 is a perspective view of an embodiment of a cutting insert of the present invention.
Fig. 3 is a schematic view of the cutting insert of fig. 2 from the outer peripheral surface elevation.
Fig. 4 is a top view of fig. 3.
Fig. 5 is a partially enlarged view of a portion a in fig. 4.
Fig. 6 is a sectional view at G-G in fig. 5.
Fig. 7 is a sectional view taken at H-H in fig. 5.
Fig. 8 is a sectional view taken at J-J in fig. 5.
The reference numerals are explained below: 1. a cutting insert; 2. a knife handle; 3. a fastener;
11. a first surface; 111. a first edge; 1111. a first blade section; p, connecting part; 1112. a second blade section; 1113. a transition edge part; 112. a first corner; 1121. a first corner edge portion; 113. a second corner; 1131. a second corner edge portion; 114. a front corner face; 1141. a first front corner face; 1142. a second front corner face; 1143. a third front corner face; 1145. an extension plane; 115. chip removal groove surfaces; 1151. a first end; 1152. a second end; 1153. a most concave part; 116. a restraining surface; 118. a groove;
12. a second surface;
13. an outer peripheral surface;
14. a central bore; CL, center axis.
Detailed Description
Exemplary embodiments that embody features and advantages of the invention are described in detail below in the specification. It is to be understood that the invention is capable of other embodiments and that various changes in form and details may be made therein without departing from the scope of the invention and the description and drawings are to be regarded as illustrative in nature and not as restrictive.
Referring to fig. 1, an embodiment of the present invention provides a cutting tool including a shank 2 and a cutting insert 1 mounted on the shank 2 by a fastener 3.
In this embodiment, the tool holder 2 is a face milling cutter disc structure. A plurality of cutting inserts 1 are attached along the circumferential direction of the holder 2, and work is machined as the holder 2 rotates.
The specific structure of the tool holder 2 and the matching structure of the cutting insert 1 and the tool holder 2 can be flexibly arranged according to actual conditions, and are not limited here.
The specific structure of the cutting insert 1 will be described in detail below with reference to the accompanying drawings.
Referring to fig. 2 to 8, the cutting insert 1 of the present embodiment is an indexable insert. In particular, in this embodiment, the cutting insert 1 can also be used on both sides.
The cutting insert 1 has a first surface 11, a second surface 12 located on the opposite side of the first surface 11, and an outer peripheral surface 13 located between the first surface 11 and the second surface 12. The cutting insert 1 also has a central bore 14 extending through the first and second surfaces 11, 12, the central bore 14 being adapted for passage of a fastener 3 for mounting the cutting insert 1 on a tool holder 2 (see fig. 1). The first surface 11 and the second surface 12 are each in the form of a polygon with rotational symmetry, and the first surface 11 and the second surface 12 are in central symmetry with respect to each other, and the center of the first surface 11 and the center of the second surface 12 are both located on the central axis CL of the central hole 14. The cutting insert 1 as a whole is rotationally symmetrical about the centre axis CL.
Referring to fig. 2, the first surface 11 includes a first edge 111, a first corner 112 connecting one end of the first edge 111, a second corner 113 connecting the other end of the first edge 111, a front corner surface 114 along the first edge 111, a chip groove surface 115 along the front corner surface 114, and a constraint surface 116 along the front corner surface 114 and the chip groove surface 115.
Wherein a first edge 111, a first corner 112 and a second corner 113 are located at the outer edge of the first surface 11 for forming a cutting edge of the cutting insert 1. The restraining surface 116 is intended to form a constraint with the holder 2 to keep the cutting insert 1 tight on the holder 2. The constraint surface 116 is disposed around the central hole 14 and perpendicular to the central axis CL, and the constraint surface 116 is closer to the second surface 12 than the first edge 111, that is, the constraint surface 116 is concave to the second surface 12 than the cutting edge on the first surface 11, so that a larger chip discharging space can be formed between the constraint surface 116 and the cutting edge. The front corner face 114 and the chip ejection face 115 connect between the first edge 111 and the restraining face 116.
Referring to fig. 4, the projection of the first surface 11 is substantially in the shape of a square, and the four corners of the square are in circular arc transition. The side length of the square is defined as L0, which can be determined by projection measurement L0. The outer edge of the first surface 11 has four first edges 111, and each first edge 111 extends along the side length of the square. The distance between the two opposite first edges 111 is the side length L0 of the first surface 11.
The first corner 112 and the second corner 113 are respectively connected between two adjacent first edges 111. The first corner 112 and the second corner 113 are actually the same structure, and are only distinguished by name for convenience of description, specifically, with reference to the view direction of fig. 4, for a specific one of the first edges 111, the first corner 112 is located in the clockwise direction of the first edge 111, and the second corner 113 is located in the counterclockwise direction of the first edge 111. In this embodiment, the first corner 112 and the second corner 113 are both arc-shaped, and two ends of the arc are respectively connected to two adjacent first edges 111. In other embodiments, the first corner 112 and the second corner 113 may also be straight and connected to the two adjacent first edges 111 in an inclined manner, in which case, the four corners of the square projected on the first surface 11 form an oblique angle transition.
The first corner 112 is provided with a first corner edge portion 1121, and the second corner 113 is provided with a second corner edge portion 1131. In the direction from the first corner 112 or the second corner 113 to the central axis CL, the restraining surface 116 may be connected by a flat surface or a curved surface in the form of a step, and these flat surfaces or curved surfaces define the rake angle of the first corner edge portion 1121 or the second corner edge portion 1131.
Referring to fig. 2 and 3, the first edge 111 includes a first edge portion 1111, a second edge portion 1112, and a transition edge portion 1113 connected between the first edge portion 1111 and the second edge portion 1112.
The first edge portion 1111 extends from the first corner 112 to the second corner 113, and approaches the second surface 12 as approaching the second corner 113. The first edge portion 1111 may extend linearly as a whole, may also extend linearly in multiple sections, or extend in a shape combining a straight line and a curve, and the specific extending shape may be designed according to actual requirements.
One end of the first edge portion 1111 is connected to the first corner 112 in a smooth transition manner, and the other end is connected to the transition edge portion 1113 in a smooth transition manner, wherein the connection point between the first edge portion 1111 and the transition edge portion 1113 is marked as P. In this embodiment, the first blade portion 1111 has a larger extension length, and the joint P is more biased toward the second corner 113, i.e. the distance between the joint P and the second corner 113 is smaller than the distance between the joint P and the first corner 112.
The second blade 1112 extends from the second corner 113 to the first corner 112 and approaches the second surface 12 as it approaches the first corner 112. The second blade portion 1112 extends linearly, and both ends thereof are smoothly transitionally connected to the second corner 113 and the transition blade portion 1113, respectively. The length of the second edge portion 1112 is less than the length of the first edge portion 1111. As shown in fig. 3, an included angle between the second blade part 1112 and a plane S perpendicular to the central axis CL is defined as an inclination angle θ 2 of the second blade part 1112.
The transition edge portion 1113 extends linearly between the first edge portion 1111 and the second edge portion 1112, approaching the second surface 12 as it approaches the first corner 112. As shown in FIG. 3, the included angle between the transition edge portion 1113 and a plane S perpendicular to the central axis CL is defined as the inclination angle θ 3 of the transition edge portion 1113. The angle of inclination θ 3 of the transition edge portion 1113 is greater than the angle of inclination θ 2 of the second edge portion 1112.
When the cutting insert 1 is used, a right-angled surface is machined on a workpiece by the combination of the first edge portion 1111 at one first edge 111, the second edge portion 1112 and the transition edge portion 1113 at the adjacent first edge 111, and the first corner edge portion 1121 or the second corner edge portion 1131 connected between the two first edges 111. Among them, the first blade portion 1111 is generally used as a main cutting blade to machine the side end surface of the workpiece, and the combination of the second blade portion 1112 and the transition blade portion 1113 is used as a sub cutting blade or a finishing blade to machine the bottom surface of the workpiece. In this embodiment, since the first blade portion 1111 has a large extension length, the processing efficiency can be ensured. The secondary cutting edge can also have a proper length when the size of the blade is limited, and the processing performance of the secondary cutting edge is ensured.
Referring to fig. 2, the front corner surface 114 extends from the first edge 111 to the central hole 14 by a certain width and approaches the second surface 12 with increasing distance from the first edge 111. Such an obliquely extending arrangement of the rake face 114 secures the width and angle of the rake face 114, facilitating securing of the strength and sharpness of the cutting edge and the chip discharging performance, thereby securing the cutting performance of the cutting insert 1.
Specifically, referring to FIG. 4, rake surfaces 114 include a first rake surface 1141 disposed along the first edge portion 1111, a second rake surface 1142 disposed along the second edge portion 1112, and a third rake surface 1143 disposed along the transition edge portion 1113. The first rake surface 1141 defines the rake angle of the first edge portion 1111, the second rake surface 1142 defines the rake angle of the second edge portion 1112, and the third rake surface 1143 defines the rake angle of the transition edge portion 1113. The specific inclination angles and the extension shapes of the first rake surface 1141, the second rake surface 1142 and the third rake surface 1143 can be designed according to actual requirements.
Referring to fig. 2 and 4, the chip groove surface 115 extends from the front corner surface 114 toward the central bore 14 and away from the second surface 12 as it moves away from the front corner surface 114. The chip groove surface 115 connects the first rake surface 1141 and the third rake surface 1143, and is distal from the second rake surface 1142. In the direction extending along the first edge 111, the chip groove surface 115 adjoins a portion of the first rake surface 1141, a portion of the third rake surface 1143, but not the second rake surface 1142.
The chip groove surface 115 is located between the first edge 111 and the constraining surface 116, which facilitates to ensure the angle and width of the front corner surface 114 to ensure the cutting performance of the cutting insert 1. Meanwhile, after the chips generated by cutting at the first edge portion 1111 are generated along the first rake surface 1141 and hit the chip discharging groove surface 115, the chips are blocked by the chip discharging groove surface 115 to be curled due to the inclined arrangement of the chip discharging groove surface 115, and then are discharged along the chip discharging groove surface 115 in the direction away from the first surface 11, that is, discharged outside the cutting insert 1, so that the chips can be prevented from being scraped to the second edge portion 1112 which does not participate in cutting at the same first edge 111, and the cutting edge can be well protected. Through the guidance of the chip removal groove surface 115 to the chips, the chips are more convenient to discharge, the chip removal space of the cutting blade 1 is saved, the overall shape of the cutting blade 1 can be reduced under the condition that the same cutting edge shape is ensured, the overall size of the cutting blade 1 is favorably reduced, the usage amount of raw materials of the blade is reduced, and the cost is reduced.
Preferably, the chip evacuation surface 115 is located closer to the second surface 12 than the restraining surface 116, so that a larger chip disposal space is provided between the chip evacuation surface 115 and the first edge portion 1111, which is more convenient for chip curling and chip evacuation.
Referring to fig. 5, in the present embodiment, the front rake surface 114 further includes an extending surface 1145, and the chip groove surface 115 connects the first front rake surface 1141 and the third front rake surface 1143 with the extending surface 1145.
The extending surface 1145 extends from the first front corner surface 1141 toward the central hole 14, and the extending surface 1145 approaches the second surface 12 with increasing distance from the first front corner surface 1141 toward the central axis CL. In the direction extending along the first edge 111, the extending surface 1145 is contiguous with a portion of the first rake surface 1141, and is contiguous with a portion of the third rake surface 1143, but is not contiguous with the second rake surface 1142.
In this embodiment, the chip ejection slot surface 115 has a first end 1151 closest to the first corner 112 and a second end 1152 closest to the second corner 113. First end 1151 and second end 1152 bound the chip groove surface 115 in a direction extending along first edge 111, first end 1151 being connected to first rake surface 1141 by extending surface 1145, and second end 1152 being connected to third rake surface 1143 by extending surface 1145.
The projected length of the distance between the first end 1151 and the second end 1152 in the extending direction of the first edge 111 is L1, i.e. the projected length of the chip groove surface 115 in the extending direction of the first edge 111 is L1.
In some preferred embodiments, L1 is 1/7-1/3 of the length of the first surface 11, L0, i.e., L1/L0 is 1/7-1/3. Under this design range, on the one hand, the chip discharging groove surface 115 has a sufficient length to achieve the desired chip breaking and chip discharging effect, and on the other hand, the chip discharging groove surface 115 does not occupy an excessive area of the first surface 11, so that the constraining surface 116 has a sufficient area to ensure the locking effect of the cutting insert 1 on the holder 2, and comprehensively, the chip processing effect and the constraining locking effect can be balanced.
Referring to fig. 5-8, the debris exit surface 115 and the extended surface 1145 cooperate to form a groove 118 recessed toward the second surface 12 relative to the restraining surface 116.
Referring to fig. 6-8, the debris slot surface 115 and the extended surface 1145 meet at the bottom of the groove 118 in a smooth transition. With reference to the top-bottom orientation in the direction of the views of fig. 6 to 8, the chip groove surface 115 constitutes a rising portion of the groove 118 and the extension surface 1145 constitutes a declining portion of the groove 118, seen in the direction from the first edge 111 towards the central axis CL.
With reference to fig. 6 to 8, the included angles α between the different positions of the chip discharge groove surface 115 and the plane of the constraint surface 116 are not completely the same, and the included angles α are labeled α 1, α 2, and α 3 in fig. 6 to 8. The inclination angle of the chip ejection slot surface 115 relative to the constraint surface 116 varies gradually from the first end 1151 to the second end 1152, and the specific curved shape can be designed flexibly, but generally, the closer to the first end 1151 or the second end 1152, the smaller the included angle α between the chip ejection slot surface 115 and the plane of the constraint surface 116. In the three sections illustrated in fig. 6 to 8, the included angle α 1 is smaller than the included angle α 2, and the included angle α 3 is smaller than the included angle α 2.
Preferably, at various locations between first end 1151 and second end 1152, included angle α varies over the range: 0 < alpha < 40.
Similarly, the included angles β between the different positions of the extending surface 1145 and the plane of the restraining surface 116 are not completely the same, and the included angles β are labeled β 1, β 2, and β 3 in fig. 6 to 8, respectively. In the extending direction along the first edge 111, the inclined angle of the extending surface 1145 relative to the restraining surface 116 is gradually changed, wherein the side of the extending surface 1145 close to the first edge 111 is connected to the first front corner surface 1141 and the third front corner surface 1143, and the extending surface 1145 is further connected to the first front corner surface 1141 and the third front corner surface 1143 by a suitable angle and shape transition. The specific curved surface shape of the extending surface 1145 can be designed according to practical situations.
Preferably, the variation range of the included angle β at different positions of the extending surface 1145 along the extending direction of the first edge 111 is: 0 ° < β <35 °.
In addition, as can be seen from the cross sections shown in fig. 6-8 at different positions, the bottom of the groove 118 formed by the intersection of the groove surface 115 and the extended surface 1145 is a curved surface with not the same depth relative to the constraint surface 116. As shown in FIG. 5, the bottom of the groove 118 has a recess 1153 that is deepest relative to the restraining surface 116, i.e., closest to the second surface 12.
The most recessed portion 1153, i.e., the chip ejection slot surface 115, is located closest to the second surface 12 relative to the constraint surface 116, and the most recessed portion 1153 is located between the first end 1151 and the second end 1152. In a first position from the first end 1151 to the most concave recess 1153 and a second position closer to the most concave recess 1153, the chip ejection slot surface 115 in the first position has a smaller angle α with respect to the plane of the restraining surface 116 than in the second position. In some embodiments, the chip groove surface 115 and the plane of the restraining surface 116 may be designed to have an increasing angle α in a direction from the first end 1151 to the most recessed portion 1153.
Preferably, the most recess 1153 is closer to the first corner 112 than the junction P of the first edge portion 1111 and the transition edge portion 1113 in the direction extending along the first edge 111. Since the first blade portion 1111 is obliquely disposed, the closer it is to the transition blade portion 1113, the closer it is to the second surface 12. The grooves 118 formed by the correspondingly arranged chip discharge groove surfaces 115 and the extending surfaces 1145 can increase the chip discharge space of the first edge portion 1111, and meanwhile, the most concave portion 1153 is closer to the first corner 112 than the joint P, and correspondingly, the chip discharge groove surfaces 115 form an upward inclined surface relative to the most concave portion 1153 at the position corresponding to the joint P, so that the chip discharge effect is more facilitated, the area of the first surface 11 occupied by the chip discharge groove surfaces 115 is reduced while the chip discharge effect is ensured, and the area of the constraint surface 116 can be better ensured to improve the constraint effect.
In some embodiments, a projected length of the distance from the first end 1151 to the most concave portion 1153 along the extension direction of the first edge 111 is L2, and the projected length L2 is preferably 1/2-2/3 of the total projected length L1 of the debris discharging groove surface 115, that is: L2/L1 is 1/2-2/3.
As described in detail above with respect to the first surface 11, for the cutting insert 1 of the present embodiment that can be used on both sides, the second surface 12 may have the same structure as the first surface 11, and both have rotational symmetry and may be interchanged by turning. The second surface 12 will not be described in detail here. By adjusting the manner of mounting, the first surface 11 or the second surface 12 can be selectively made to participate in cutting when the cutting insert 1 is mounted on the holder 2.
Referring to fig. 2, the outer circumferential surface 13 is connected between the first surface 11 and the second surface 12, the outer circumferential surface 13 is formed by surrounding a plurality of sides parallel to the central axis CL, and the outer circumferential surface 13 may include a flat surface and a curved surface according to the extension shape of the outer edges of the first surface 11 and the second surface 12 to be adaptively connected with the first surface 11 and the second surface 12.
While the present invention has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.
Claims (12)
1. A cutting insert having:
a first surface in the shape of a rotationally symmetric polygon;
a second surface located on an opposite side of the first surface;
a peripheral surface between the first surface and the second surface; and
a central axis that intersects a center of the first surface and a center of the second surface;
the method is characterized in that:
the first surface includes:
a first edge;
a first corner connecting the first edge;
the second corner is connected with the first edge;
a front corner surface disposed along the first edge and closer to the second surface as it moves away from the first edge;
a chip removal groove surface arranged along the front corner surface and away from the second surface with the distance from the front corner surface; and
the restraint surface is arranged along the front corner surface and the chip removal groove surface, is closer to the second surface than the first edge and is perpendicular to the central shaft;
the first edge includes:
a first edge portion extending from the first corner to the second corner and approaching the second surface as approaching the second corner;
a second blade portion extending linearly from the second corner toward the first corner and approaching the second surface as approaching the first corner; and
a transition edge portion connecting the first edge portion and the second edge portion and approaching the second surface as approaching the first corner;
the angle of inclination of the transition edge is greater than the angle of inclination of the second edge when looking straight at the outer peripheral surface;
the front corner face includes:
a first rake surface disposed along the first blade portion;
a second rake surface disposed along the second blade portion; and
a third front corner surface disposed along the transition edge portion;
the chip removal groove face is connected first preceding angular surface with the third preceding angular surface, and keeps away from the second preceding angular surface.
2. The cutting insert according to claim 1, wherein the chip ejection slot surface is closer to the second surface than the constraining surface.
3. The cutting insert according to claim 2, wherein the chip evacuation slot surface has a first end closest to the first corner and a second end closest to the second corner, the first end meeting the first front corner surface and the second end meeting the third front corner surface; the chip removal groove surface is provided with a most concave position which is closest to the second surface relative to the restraining surface, and the most concave position is positioned between the first end and the second end.
4. The cutting insert according to claim 3 wherein, in a direction extending along the first edge, the most recess is closer to the first corner than to where the first edge portion meets the transition edge portion.
5. The cutting insert according to claim 4, wherein a projected length of a distance from the first end to the second end in the extending direction of the first edge is L1, a projected length of a distance from the first end to the most recessed portion in the extending direction of the first edge is L2, and L2/L1 is 1/2-2/3 when viewed from the direction of the restraining surface.
6. The cutting insert according to claim 3, wherein the chip ejection surface is at an angle α to the plane of the constraining surface, the angle α being smaller in a first position than in a second position from the first end to the most concave recess and having a first position and a second position closer to the most concave recess.
7. The cutting insert according to claim 6, wherein the included angle α varies at different positions between the first end and the second end by: 0 < alpha < 40.
8. The cutting insert according to claim 2, wherein the rake surface further comprises an extension surface connected between the first rake surface and the chip groove surface; the extension surface approaches the second surface with increasing distance from the first front corner surface in a direction toward the central axis.
9. The cutting insert according to claim 8, wherein the included angle β between the extension surface and the plane of the restraining surface is β, and the included angle β varies from one position to another in the extension direction of the first edge to the other position: 0 ° < β <35 °.
10. The cutting insert according to any one of claims 1-9, wherein the projected length of the chip groove surface in the direction of extension of the first edge is 1/7-1/3 of the side length of the first surface.
11. The cutting insert according to any one of claims 1-9 wherein the length of the first edge portion is greater than the length of the second edge portion.
12. A cutting tool comprising a shank and a cutting insert according to any one of claims 1-11 mounted on the shank.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110308460.0A CN115106584A (en) | 2021-03-23 | 2021-03-23 | Cutting insert and cutting tool |
| JP2023555314A JP2024508990A (en) | 2021-03-23 | 2022-03-23 | Cutting blades and cutting tools |
| PCT/CN2022/082436 WO2022199598A1 (en) | 2021-03-23 | 2022-03-23 | Cutting blade and cutting tool |
| CN202280020624.2A CN117042903A (en) | 2021-03-23 | 2022-03-23 | Cutting insert and cutting tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110308460.0A CN115106584A (en) | 2021-03-23 | 2021-03-23 | Cutting insert and cutting tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115106584A true CN115106584A (en) | 2022-09-27 |
Family
ID=83323134
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110308460.0A Pending CN115106584A (en) | 2021-03-23 | 2021-03-23 | Cutting insert and cutting tool |
| CN202280020624.2A Pending CN117042903A (en) | 2021-03-23 | 2022-03-23 | Cutting insert and cutting tool |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202280020624.2A Pending CN117042903A (en) | 2021-03-23 | 2022-03-23 | Cutting insert and cutting tool |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2024508990A (en) |
| CN (2) | CN115106584A (en) |
| WO (1) | WO2022199598A1 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT12630U1 (en) * | 2011-08-26 | 2012-09-15 | Ceratizit Austria Gmbh | DOUBLE-SIDED CUTTING INSERT FOR MILLING |
| CN103008702B (en) * | 2012-12-24 | 2015-05-27 | 株洲欧科亿硬质合金有限公司 | Polygonal cutting blade for processing soft metal material |
| JP6205726B2 (en) * | 2013-01-15 | 2017-10-04 | 三菱マテリアル株式会社 | Cutting inserts for face milling and exchangeable face milling |
| AT14282U1 (en) * | 2014-09-03 | 2015-07-15 | Ceratizit Austria Gmbh | Double-sided cutting insert and milling tool |
| EP3530391A1 (en) * | 2018-02-26 | 2019-08-28 | Seco Tools Ab | Cutting insert and tool body for a milling tool |
-
2021
- 2021-03-23 CN CN202110308460.0A patent/CN115106584A/en active Pending
-
2022
- 2022-03-23 WO PCT/CN2022/082436 patent/WO2022199598A1/en active Application Filing
- 2022-03-23 CN CN202280020624.2A patent/CN117042903A/en active Pending
- 2022-03-23 JP JP2023555314A patent/JP2024508990A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN117042903A (en) | 2023-11-10 |
| WO2022199598A1 (en) | 2022-09-29 |
| JP2024508990A (en) | 2024-02-28 |
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