CN209902274U

CN209902274U - Double-sided groove type cutting blade

Info

Publication number: CN209902274U
Application number: CN201920445311.7U
Authority: CN
Inventors: 谢清亮; 李树强; 张颖; 袁美和; 谭文清
Original assignee: Zhuzhou Ouke Cnc Precision Cutting Tools Ltd By Share Ltd
Current assignee: Zhuzhou Ouke Cnc Precision Cutting Tools Ltd By Share Ltd
Priority date: 2019-04-03
Filing date: 2019-04-03
Publication date: 2020-01-07
Anticipated expiration: 2029-04-03

Abstract

The utility model relates to a metal cutting technical field discloses a two-sided cell type cutting blade. At least 1 cutting unit part is arranged at the top angle of the blade body; the cutting unit part comprises a cutting guide protruding part, a rear end protruding part, an inclined surface and a cutting edge; the cutting edge consists of an arc cutting edge and a main cutting edge; the vertex angle of the cutting unit part is sequentially provided with an arc cutting edge, a chamfered surface, a first rake face, an inclined plane connected with the first rake face, a cutting guide bulge connected with the inclined plane and a rear end bulge positioned at the rear end of the cutting guide bulge along an angular bisector of the vertex angle; the inclined surface is limited by the cutting guide protrusion and the first rake surface together; the double-sided slot cutting blade has excellent chip processing capacity in medium and small cutting depth processing, and does not excessively increase the cutting processing in large cutting depth and large feed processing. A plurality of subareas are arranged to ensure reasonable cutting resistance of the blade.

Description

Double-sided groove type cutting blade

Technical Field

The utility model relates to a metal cutting technical field, more specifically relates to a two-sided cell type cutting blade.

Background

Indexable inserts are generally manufactured in batches, and different insert groove types and materials are adopted to correspond to different processing occasions. The traditional processing mode adopts rough machining or semi-finish machining and then finish machining, the materials removed by rough machining are generally more, and in order to ensure the processing efficiency, large cutting depth and large feeding are adopted. The rough machining is generally severe in working condition, a thick hardened layer is often formed on the surface of a forged or cast workpiece, the surface is extremely uneven, and the impact type cutting resistance is large during machining. Meanwhile, the workpiece is often accompanied by sand inclusion, burrs and the like, so that the blade is very easy to break under the action of overlarge or repeated impact force during the processing of the blade. To accommodate this, the strength of the cutting edge of the insert is generally high and the chip breaking structure of the insert is adapted to this parameter.

With the improvement of domestic forging and casting technology, the size and the surface performance of a forged blank can be controlled in a stricter range, and the removal amount during workpiece processing is required to be reduced as much as possible in order to reduce the processing cost and the waste of blank materials. Meanwhile, due to the industrial upgrading and the improvement of automation, the requirement on the chip treatment is stricter. Thus, the market puts new demands on the machining, mainly including that the rough machining cutting depth is reduced, the chip breaking capacity under a smaller cutting depth needs to be ensured, the feeding is still very large, and the blade needs to have enough cutting edge strength; the finishing allowance is correspondingly reduced, and the workpiece after rough machining has enough precision.

Thus, conventional inserts for roughing or semi-finishing, which have problems in that they do not break after the cutting depth becomes small, become unsuitable; the traditional semi-finishing blade is insufficient in cutting edge strength, and poor in chip breaking effect in small cutting depth, especially in an automatic production line. A blade with "banana" or C-shaped projections at the cutting corners as disclosed in chinese patent No. CN1120324, which enables good cutting control at small, medium and large cutting depths, especially at internal, external profiling and plane turning, but which is not necessarily optimized for the cutting edge, and since the start section of the "banana" or C-shaped projections is not constrained, sharp increase of cutting resistance is easily caused at large cutting depths and feeds, and the cutting life of the blade is reduced, and the "banana" or C-shaped projections are easily worn and the effect of the cutting treatment is reduced in rough machining for a long time.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to the not enough among the prior art, provide a two-sided cell type cutting blade.

The purpose of the utility model is realized through the following technical scheme:

a double-sided groove-type cutting blade is characterized in that a blade body is a polygonal geometric mechanism which is symmetrically arranged up and down, and the blade body is provided with a central positioning hole positioned in the geometric center; the insert body comprises an upper surface, a lower surface, a plurality of side surfaces connecting the upper surface and the lower surface, and an arc side surface positioned between two adjacent side surfaces, wherein the upper surface and the lower surface are both provided with supporting surfaces;

at least 1 cutting unit part is arranged at the vertex angle of the blade body; the cutting unit part comprises a cutting guide protruding part, a rear end protruding part, an inclined surface and a cutting edge; the cutting edge consists of an arc cutting edge and a main cutting edge;

the cutting edge is inclined inwards and downwards to form a chamfered surface; the chamfered surface is inclined inwards and downwards to form a first rake face; the first front tool face at the rear end of the main cutting edge is inclined inwards and downwards to form a second front tool face;

the vertex angle of the cutting unit part is sequentially provided with an arc cutting edge, a chamfered surface, a first rake surface, an inclined surface connected with the first rake surface, a cutting guide bulge part connected with the inclined surface and a rear end bulge part positioned at the rear end of the cutting guide bulge part along an angular bisector M of the vertex angle; the inclined surface is limited by the cutting guide protrusion and the first rake surface together;

the cutting edge and the cutting guide lug part are converged towards the vertex angle, and are symmetrical about an angle bisector M passing through the vertex angle and perpendicular to a plane of the neutral plane NP;

further, the arc cutting edge is formed by the intersection of an upper surface and an arc side surface; the main cutting edge is formed by the intersection of the upper surface and the side surface.

Further, the front end of the rear end boss is connected with the cutting guide boss, and the rear end is connected with the supporting surface; the rear end convex part is arranged in a section which passes through the angular bisector M and is vertical to the neutral reference plane NP, and the range of an acute angle kappa formed between the rear end convex part and the supporting surface is that kappa is not more than 45 degrees.

Furthermore, a cutting guide convex part similar to an angle is arranged at the vertex angle of the cutting unit part; the cutting guide boss extends from the rear end boss, extends towards the first rake face and the arc cutting edge, and is finally embedded into the first rake face; the height of the cutting guide protrusion is lower than the cutting edge of the cutting edge in the extending direction and higher than the inclined surface.

Further, a range of a shortest distance S from a connecting boundary of the inserted cutting guide protrusion and the first rake surface to the cutting edge is: s is more than 0.2 mm.

Further, in the cutting unit portion of blade body, get the point from the mid point of circular arc cutting edge to main cutting edge direction in proper order to when the tangent line of perpendicular this point is done the cross-section, chamfer, first rake face and second rake face and the wedge angle of peripheral side surface and relative neutral surface NP's width change according to certain law, according to the law of change, can divide the cross-sectional area into I, II, III three parts at least, and its law does: the wedge angle and the width in the front region are always smaller or equal than the wedge angle and the width in the rear region.

Further, the cutting edge of the I area consists of an integral arc cutting edge or a partial arc cutting edge; the cutting edge of the area II consists of a part of main cutting edge or the main cutting edge and a part of arc cutting edge; the cutting edge of region III is composed of the main cutting edge portion not occupied by region II.

Further, the radian of the included arc cutting edge of the region II is more than or equal to 0 degrees and less than or equal to 25 degrees; the length L of the main cutting edge contained in the area II is within the range of 1mm < L < 2.5 mm.

Further, in the I, III area, the wedge angle β 1 between the chamfered surface and the side surface in the I, III area is respectively 83 ° - β 1 ≦ 87 ° - β 1 ≦ 90 °;

the wedge angle beta 2 formed by the first front tool surface and the side surface in the I, III area is respectively 70 degrees to 78 degrees, 73 degrees to 78 degrees;

the wedge angle beta 3 formed by the second front tool face and the side surface of the III area is between 78 and 85 degrees.

The width W1 of the opposite neutral surface NP of the I, III region chamfered surface ranges from 0.15mm to 0.25mm of W1 to 0.2mm to 0.35mm of W1;

the width W1 of the opposite neutral surface NP of the first front cutter surface in the I, III area ranges from 0.2mm to 0.5mm of W2 and from 0.3mm to 0.6mm of W2.

Further, each of the wedge angles β 1, β 2, β 3 and the widths W1, W2 in the I, III region has a value in zone II equal to or greater than the corresponding value in zone i and equal to or less than the corresponding value in zone iii, and is continuously variable in volume.

Compared with the prior art, the utility model discloses following beneficial effect has:

(1) the double-sided groove-shaped cutting blade of the utility model is provided with the front end cutting guide lug boss and the rear end lug boss in a matching way on the cutting unit, wherein the front end cutting guide lug boss is a cutting guide lug boss similar to an angle, the structural characteristics of the double-sided groove-shaped cutting blade can ensure that the blade has excellent chip processing capacity in medium and small cutting depth processing, and simultaneously, even in the later stage of processing, under the condition that the abrasion of a front blade surface is serious, the blade can also ensure that the blade has good chip processing effect in large cutting depth and large feed processing, and the cutting resistance is not excessively increased;

(2) the utility model discloses a two-sided cell type cutting blade is through the reasonable setting to I on the cutting unit, II, III regional cutting part chamfered surface and rake face parameter guarantee that blade cutting resistance is reasonable, and the blade is firm simultaneously to guarantee that the blade can not break edge when carrying out the heavy feed under the abominable operating mode such as intermittent.

Drawings

Fig. 1 is a perspective view of a double-sided slot-type cutting insert according to example 1;

fig. 2 is a front view of a double-sided pocket type cutting insert according to embodiment 1;

fig. 3 is a side view of a double-sided, pocket-type cutting insert according to embodiment 1;

fig. 4 is a perspective view of a partially enlarged view of a cutting unit of the double-sided slot-type cutting insert according to embodiment 1;

fig. 5 is a front view schematically showing a partially enlarged view of a cutting unit of the double-sided slot-type cutting insert according to embodiment 1;

fig. 6 is a sectional view showing F-F of the double-sided pocket type cutting insert of embodiment 1;

fig. 7 is a sectional view of G-G of the double-sided pocket type cutting insert of embodiment 1;

fig. 8 is a cross-sectional view of an E-E of the double-sided pocket type cutting insert of embodiment 1;

fig. 9 is a sectional view of a double-sided pocket-type cutting insert according to embodiment 1, taken along line D-D.

Detailed Description

The present invention will be further described with reference to the following embodiments. Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

Example 1

As shown in fig. 1, a double-sided slot type cutting insert, an insert body 1 is a polygonal geometric mechanism which is arranged symmetrically up and down, and the insert body 1 is provided with a central positioning hole 2 positioned at the geometric center; the insert body comprises an upper surface 4, a lower surface, a plurality of side surfaces 31 connecting the upper surface 4 and the lower surface, and a circular arc side surface 32 positioned between two adjacent side surfaces 31, wherein the upper surface 4 and the lower surface are both provided with supporting surfaces 7; in this embodiment 1, the insert body 1 has an approximately triangular geometry.

As shown in fig. 1, at least 1 cutting unit part a is arranged at the top corner of the blade body 1; the cutting unit part a includes a cutting guide boss 9, a rear end boss 10, an inclined surface 8, and a cutting edge 5; the cutting edge 5 is composed of a circular arc cutting edge 51 and a main cutting edge 52;

as shown in fig. 4, the cutting edge 5 is inclined inward and downward, that is, inward and downward toward the center positioning hole, to form a chamfered surface 61; the chamfered surface 61 is inclined inward and downward to form a first rake surface 62; and a rear end at the main cutting edge, a first rake face 62 of which is inclined inwardly downward to form a second rake face 63;

as shown in fig. 2 and 4, the vertex angle of the cutting unit a is provided with an arc cutting edge 51, a chamfered surface 61, a first rake surface 62, an inclined surface 8 connected to the first rake surface 62, a cutting guide protrusion 9 connected to the inclined surface 8, and a rear end protrusion 10 located at the rear end of the cutting guide protrusion 9 in this order toward the center positioning hole 2 along an angle bisector M of the vertex angle; the inclined surface 8 is limited by the cutting guide protrusion 9 and the first rake surface 62, the range of the inclined surface 8 is limited by the size of the front end of the cutting guide protrusion 9 and the rear end of the first rake surface 62, a certain space is formed in the middle after the cutting guide protrusion 9 is connected with the first rake surface 62, the space is the inclined surface 8, and the inclined surface 8 is connected with the first rake surface 62, is inclined upwards and is connected with the cutting guide protrusion 9;

as shown in fig. 4, the cutting edge 5 and the cutting guide protrusion 9 converge towards the vertex angle and are symmetrical about a bisector M passing through the vertex angle and perpendicular to a plane of the neutral plane NP, which is the transverse center plane of the insert body 1 in this embodiment 1, as shown in fig. 3. The neutral planes NP are all parallel to the upper surface 1 and the lower surface.

As shown in fig. 1, the circular arc cutting edge 51 is formed by the intersection of the upper surface 4 and the circular arc side surface 32; the major cutting edge 52 is formed by the intersection of the upper surface 4 and the side surface 31.

As shown in fig. 4, the present double-sided slot-type cutting insert has a rear end protrusion 10 whose front end is coupled to the cutting guide protrusion 9 and whose rear end is coupled to the support surface 7; as shown in FIG. 6, the rear end projection 10 has an acute angle K with the support surface 7 in the range of K45 in a cross section perpendicular to the neutral reference plane NP through the bisector M of the apex angle.

As shown in fig. 6, the maximum distance a from the edge of the circular-arc edge 51 to the connecting point of the support surface 7 and the rear-end convex portion 9 in the direction parallel to the neutral reference plane NP is greater than 1.2mm and less than 2.0mm, preferably a =1.7 mm.

As shown in fig. 4, the cutting insert of the present invention has a double-sided slot type, wherein the apex angle of the cutting unit a is provided with a cutting guide protrusion 9 similar to an "angle" shape, or an "eight" shape, the upper end slot angular bisector M of the cutting guide protrusion 9 gathers together and is connected to the rear end protrusion 9, and the front end branches to both sides of the angular bisector M and is connected to the first rake face 62 to form an "eight" shape; in the present embodiment 1, the cutting guide protrusion 9 extends from the rear end protrusion 10, extends toward the first rake surface 62 and the circular arc cutting edge 51, and finally engages with the first rake surface 62 to form a similar "corner" shaped protrusion or a "v" shaped protrusion; the cutting guide protrusion 9 has a protrusion height lower than the edge of the cutting edge 5 in the extending direction and higher than the highest point of the inclined surface 8.

As shown in fig. 9, the shortest distance S from the connecting boundary between the cutting guide protrusion 9 and the first rake surface 62 to the cutting edge 5: s > 0.2mm, and in this example 1, S =0.04mm is preferable.

As shown in fig. 5, when points are sequentially taken from the midpoint of the circular arc cutting edge 51 toward the main cutting edge 52 in the cutting unit portion a of the insert body 1 and a tangent line perpendicular to the points is taken as a cross section, the wedge angles of the chamfered surface 61, the first rake surface 62, and the second rake surface 63 with the peripheral side surface 3 and the width of the relative neutral plane NP are changed in a certain rule, and the cross-sectional area can be divided into at least three sections i, ii, and iii according to the change rule: the wedge angle and the width of the front region are always smaller than or equal to those of the rear region, i.e. I ≦ II ≦ III.

As shown in fig. 5, the cutting edge 5 of the I region is composed of an integral circular arc cutting edge 51 or a partial circular arc cutting edge 51; the cutting edge 5 in the region II is composed of a partial main cutting edge 52 or a partial circular arc cutting edge 51 added to the partial main cutting edge 52; the cutting edge 52 in the region III is composed of the main cutting edge 52 portion not occupied by the region II.

In the region II, the included arc cutting edge 51 should have a curvature of 0 ° or more and 25 ° or less; the length L of the major cutting edge 52 in region II is in the range of 1mm < L < 2.5 mm. In embodiment 1, the curvature of the circular cutting edge 51 in region II is preferably 15 °, and the length L of the main cutting edge 52 is preferably 2 mm.

As shown in fig. 6 to 8, in the area I, III in the insert body 1, the wedge angle β 1 between the chamfered surface 61 in the area I, III and the side surface 3 is respectively 83 ° ≦ β 1 ≦ 87 °, preferably 85 °, 87 ° ≦ β 1 ≦ 90 °, preferably 90 °;

as shown in fig. 6-8, in the region I, III, the wedge angle β 2 between the first rake surface 62 and the side surface 3 is respectively 70 ° ≦ β 2 ≦ 78 °, preferably 73 °, 73 ° ≦ β 2 ≦ 78 °, preferably 75 °;

as shown in fig. 8, the wedge angle β 3 between the second rake face and the side surface in the region III is in a range of 78 ° ≦ β 3 ≦ 85 °, preferably 82 °.

As shown in fig. 6 to 8, in the region I, III, the width of the chamfered surface 61 relative to the neutral plane NP, i.e. the distance between the chamfered surface 61 and the left and right ends of the neutral plane NP in the direction of the neutral plane NP, W1 ranges from 0.15mm to 0.1 to 0.25mm, preferably from 0.2mm to 0.1 to 0.35mm, preferably 0.25mm, respectively;

as shown in fig. 6 to 8, in the region I, III, the width of the first rake face 62 relative to the neutral plane NP, that is, the distance W2 from the side surface 3 to the end of the first rake face in the direction of the neutral plane NP, parallel to the left and right ends of the neutral plane NP, is 0.2mm ≦ W2 ≦ 0.5mm, preferably 0.35mm, 0.3mm ≦ W2 ≦ 0.6mm, and preferably 0.4mm, respectively.

In the I, III region, the wedge angles β 1, β 2, β 3 and the widths W1, W2 each have a value in zone II equal to or greater than the corresponding value in zone i and equal to or less than the corresponding value in zone iii, and are continuously variable in volume.

The utility model discloses a two-sided slot type cutting blade, the bellying through the apex angle department to cutting unit portion A is optimized, design cutting guide boss 9 and the rear end boss 10 of front end, the cutting guide boss 9 of front end is type "angle" form simultaneously, the blade carries out middle and small depth cutting man-hour like this, can play good smear metal effect, cut guide boss 9's front end simultaneously, be equipped with inclined plane 8, inclined plane 8 can accomplish effectual restraint to cutting guide boss 9's protruding originated, process when carrying out the depth cutting with feeding great with this, can guide the smear metal, reduce the cutting resistance.

Meanwhile, in order to avoid the breaking of the cutting edge, the cutting edge is divided into regions, the cutting edges in the regions are arranged independently and reasonably, the cutting resistance of the blade is guaranteed to be reasonable, the cutting edge is stable, and the blade is guaranteed not to break when being subjected to large-feed machining under severe working conditions such as interrupted working.

It is to be understood that the above-described embodiments are merely exemplary for purposes of clearly illustrating the technical solutions of the present invention, and that various other changes and modifications may be made on the basis of the above-described embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A double-sided groove-type cutting blade is characterized in that a blade body is a polygonal geometric mechanism which is symmetrically arranged up and down, and the blade body is provided with a central positioning hole positioned in the geometric center; the insert comprises an insert body and a cutting insert body, wherein the insert body comprises an upper surface, a lower surface, a plurality of side surfaces connecting the upper surface and the lower surface, and an arc side surface positioned between two adjacent side surfaces;

the vertex angle of the cutting unit part is sequentially provided with an arc cutting edge, a chamfered surface, a first rake surface, an inclined surface connected with the first rake surface, a cutting guide bulge part connected with the inclined surface and a rear end bulge part positioned at the rear end of the cutting guide bulge part towards the direction of the central positioning hole along an angular bisector (M) of the vertex angle; the inclined surface is limited by the cutting guide protrusion and the first rake surface together;

the cutting edge and the cutting guide lug part are converged towards the vertex angle and are symmetrical about an angle bisector (M) passing through the vertex angle and a plane perpendicular to a Neutral Plane (NP).

2. The double-sided pocket type cutting insert as set forth in claim 1, wherein the circular arc cutting edge is formed by an intersection of an upper surface and a circular arc side surface; the main cutting edge is formed by the intersection of the upper surface and the side surface.

3. The double-sided pocket type cutting insert as set forth in claim 1, wherein the rear end projection has a front end connected to the cutting guide projection and a rear end connected to the support surface; the rear end boss is in a section passing through the angular bisector (M) and perpendicular to the neutral reference plane (NP), and the acute angle kappa formed between the rear end boss and the supporting surface is within a range of kappa not more than 45 degrees.

4. The double-sided pocket-type cutting insert as set forth in claim 1, wherein cutting guide protrusions are provided at the top corners of the cutting unit portions in a "corner-like" shape; the cutting guide boss extends from the rear end boss, extends towards the first rake face and the arc cutting edge, and is finally embedded into the first rake face; the height of the cutting guide protrusion is lower than the cutting edge of the cutting edge in the extending direction and higher than the inclined surface.

5. The double-sided pocket type cutting insert as set forth in claim 3, wherein the shortest distance S from the connecting boundary of the inserted cutting guide protrusion and the first rake face to the cutting edge ranges from: s is more than 0.2 mm.

6. The double-sided pocket type cutting insert as set forth in claim 1, wherein in the cutting unit portion of the insert body, points are sequentially taken from a midpoint of the circular arc cutting edge toward the main cutting edge, and a tangent line perpendicular to the points is taken as a cross section, the widths of the chamfer surface, the first rake surface, the second rake surface, the wedge angle of the peripheral side surface and the relative Neutral Plane (NP) are changed according to a certain rule, and according to the changed rule, the cross-sectional area is divided into at least three sections i, ii, and iii according to the rule: the wedge angle and the width in the front region are always smaller or equal than the wedge angle and the width in the rear region.

7. The double-sided pocket-type cutting insert as set forth in claim 6, wherein the cutting edge of the I-region consists of an integral circular arc cutting edge or a partial circular arc cutting edge; the cutting edge of the area II consists of a part of main cutting edge or the main cutting edge and a part of arc cutting edge; the cutting edge of region III is composed of the main cutting edge portion not occupied by region II.

8. The double-sided pocket type cutting insert as set forth in claim 7, wherein the included arc cutting edge of said region II has an arc degree of 0 ° or more and 25 ° or less; the length L of the main cutting edge contained in the area II is within the range of 1mm < L < 2.5 mm.

9. The double-sided pocket-type cutting insert as set forth in claim 6, wherein a wedge angle β 1 between the chamfered surface and the side surface in the region I, III in the region I, III ranges from 83 ° β 1 ≦ 87 °, 87 ° β 1 ≦ 90 °, respectively;

the wedge angle beta 2 formed by the first front tool face and the side surface in the I, III area is respectively 70 degrees to 78 degrees, 73 degrees to 78 degrees;

the wedge angle beta 3 formed by the second rake face and the side surface of the area III is between 78 and 85 degrees;

the width W1 of the opposite Neutral Plane (NP) of the chamfered surface of the I, III area ranges from 0.15mm to 0.25mm of W1 and from 0.2mm to 0.35mm of W1;

the width W1 of the opposite Neutral Plane (NP) of the first rake face in the I, III area ranges from 0.2mm to 0.5mm in W2 and from 0.3mm to 0.6mm in W2.

10. The double-sided, pocket-type cutting insert of claim 9 wherein each of the wedge angles β 1, β 2, β 3 and widths W1, W2 in the I, III region has a value in zone II equal to or greater than the corresponding value in zone i and equal to or less than the corresponding value in zone iii and is continuously variable in volume.