CN216176984U - Four-edge round nose knife - Google Patents
Four-edge round nose knife Download PDFInfo
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- CN216176984U CN216176984U CN202122653887.2U CN202122653887U CN216176984U CN 216176984 U CN216176984 U CN 216176984U CN 202122653887 U CN202122653887 U CN 202122653887U CN 216176984 U CN216176984 U CN 216176984U
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- cutter
- round
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- edged
- sword
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Abstract
The utility model discloses a four-edge nose rounding cutter which comprises a cutter bar, wherein one end of the cutter bar is provided with a cutter head, the outer side wall of the cutter head is provided with at least four peripheral edges, the at least four peripheral edges spirally extend to the cutting end of the cutter head from the connecting end of the cutter head, the cutting end of the cutter head is provided with an end edge connected with the peripheral edges, a chip discharge groove is formed between two adjacent peripheral edges, one side of the chip discharge groove is provided with a front cutter surface facing the rotation direction of cutting chips, the other side of the chip discharge groove is provided with a rear cutter surface, and the joint of the end edge and the peripheral edges is provided with a reinforcing structure. Through the additional strengthening between end sword and the week sword, improve the cutting power of end sword and the intensity of week sword, and then improve the life of cutter, compare with prior art, under the same rotational speed, the length of time of cutting can improve 3-4 times.
Description
Technical Field
The utility model relates to the technical field of cutters, in particular to a four-edge round nose cutter.
Background
A milling cutter is a rotating tool with one or more cutter teeth for milling. When in work, each cutter tooth cuts off the allowance of the workpiece in sequence and intermittently. The milling cutter is mainly used for processing planes, steps, grooves, formed surfaces, cut-off workpieces and the like on a milling machine. In the prior art, the connecting part between the end edge and the peripheral edge of the cutter head is easy to break, so that the service life of the cutter is influenced, frequent cutter replacement is required in the production process, the production cost is increased, and the machining precision is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a four-edge round nose cutter which has the advantages of long service life, high machining precision, and contribution to reducing the production cost and improving the machining precision.
In order to achieve the purpose, the technical scheme of the utility model is as follows:
the utility model provides a four-edge nose rounding knife, includes the cutter arbor, the one end of cutter arbor is equipped with the tool bit, the lateral wall of tool bit is equipped with four at least all swords, four at least all swords are followed the link spiral of tool bit extends to the smear metal end of tool bit, the smear metal end of tool bit is equipped with the end sword of being connected with all swords, adjacent two the shaping has the chip groove between the all swords, chip groove one side is equipped with the rake face towards smear metal direction of rotation, and the opposite side is equipped with the back knife face, the end sword with the junction of all swords is equipped with additional strengthening.
Preferably, the reinforcing structure comprises a fillet arranged at the outer end part of the end blade, and the chip surface of the end blade, the circular arc surface of the fillet and the outer side surface of the peripheral blade are sequentially connected. The chip surface of the end edge, the circular arc surface of the fillet and the outer side surface of the peripheral edge are connected through tool coupling grinding, namely, the processing tool feeds along the chip surface of the end edge, the circular arc surface of the fillet and the outer side surface of the peripheral edge in sequence.
Preferably, a reinforcing surface is arranged on one side of the circular arc surface of the fillet, which is close to the cutting surface of the end blade, a notch is formed in one end of the rake surface, which is close to the fillet, the axial length of the reinforcing surface is 2-4% of the radius of the fillet, and the axial length of the notch is 78-82% of the radius of the fillet.
More preferably, the axial length of the reinforcing surface is 2.5-3.5% of the fillet radius, and the axial length of the notch is 79-81% of the fillet radius.
Preferably, the notch comprises a first cambered surface connected with the rake face in a coplanar manner and a second cambered surface connected with the rake face different surface. The first cambered surface is connected with the front tool face and is positioned on the same face, and the second cambered surface is connected with the front tool face but is not positioned on the same face.
Preferably, included angles a are sequentially arranged among at least four end edges along the chip rotating direction1、b1、a2、b2,And satisfy the included angle a1、a2Are respectively greater than the included angle b1、b2。
Preferably, the angle a1、a2Is 92-94 degrees and an included angle b1、b2Is 86-88 degrees.
More preferably, the angle a1、a2Is 92.5-93.5 degrees and an included angle b1、b2Is 86.5-87.5 degrees.
Preferably, the cross section of the chip groove is formed by sequentially connecting three arcs.
Preferably, the at least four peripheral edges have a negative radial rake angle c at a side portion thereof closer to the chip rotation direction, and the at least four peripheral edges have a circular arc relief angle at a side portion thereof farther from the chip rotation direction.
Preferably, the negative radial rake angle c is in the range 3-10 °. The absolute value of the angle of the negative radial rake angle c with reference to the transverse axis is in the range 3-10 deg., while the negative radial rake angle c is negative with respect to the transverse axis.
More preferably, the negative radial rake angle c is in the range 5-8 °.
Preferably, the core thickness of the cutter head is 72-78% of the core thickness of the cutter bar.
More preferably, the core thickness of the cutter head is 74-76% of the core thickness of the cutter bar.
The utility model has the beneficial effects that: through the additional strengthening between end sword and the week sword, improve the cutting power of end sword and the intensity of week sword, and then improve the life of cutter, compare with prior art, under the same rotational speed, the length of time of cutting can improve 3-4 times.
The utility model also comprises the following advantages: (1) the chip surface of the end blade, the circular arc surface of the fillet and the outer side surface of the peripheral blade are sequentially connected, so that the smoothness of the surfaces of the end blade and the peripheral blade is improved, and the service life is further prolonged; (2) one end of the front cutter face close to the fillet is provided with a notch inwards, so that the cutting precision of the arc surface of the fillet is improved, and the machining precision is further improved; (3) the end blades are arranged in unequal intervals, so that the vibration can be inhibited, and the processing stability can be improved; (4) the strength of the cutting edge of the peripheral edge is improved through the radial negative front angle c and the arc rear angle d; (5) the cross section of the chip removal groove is formed by three arc lines which are sequentially connected, so that the chip removal performance of the chip removal groove is improved; (6) the core thickness of the cutter head is 72-78% of that of the cutter rod, so that the rigidity of the cutter head is improved, the rotational inertia is reduced, and the machining precision is further improved.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a side view of a four-edged round nosepiece according to the utility model;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is an enlarged view of a portion of FIG. 1 at B;
FIG. 4 is a top view of a four-edged round nosepiece according to the utility model;
FIG. 5 is a cross-sectional view of a four-edged round nose piece according to the present invention.
Shown in the figure: 1-a cutter bar;
2-tool bit, 21-peripheral edge, 211-outer side surface of peripheral edge, 22-end edge, 221-cutting surface of end edge 22, 23-chip groove, 231-rake face, 2311-notch, 23111-first cambered surface, 23112-second cambered surface, 232-relief face;
3-reinforcing structure, 31-fillet, 311-arc surface of fillet 31, 312-reinforcing surface.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 5, the four-edge nose rounding cutter of the present invention includes a cutter bar 1, wherein one end of the cutter bar 1 is provided with a cutter head 2, the outer side wall of the cutter head 2 is provided with at least four peripheral edges 21, the at least four peripheral edges 21 spirally extend from the connecting end of the cutter head 2 to the cutting end of the cutter head 2, the cutting end of the cutter head 2 is provided with an end edge 22 connected with the peripheral edges 21, a chip discharge groove 23 is formed between two adjacent peripheral edges 21, one side of the chip discharge groove 23 is provided with a front cutter surface 231 facing the chip rotation direction, the other side is provided with a rear cutter surface 232, and the connecting portion of the end edge 22 and the peripheral edges 21 is provided with a reinforcing structure 3. In this embodiment, a four-edge nose rounding knife, includes cutter arbor 1, the one end of cutter arbor 1 is equipped with tool bit 2, the lateral wall of tool bit 2 is equipped with four week sword 21, four week sword 21 is followed the link spiral of tool bit 2 extends to the smear metal end of tool bit 2, the smear metal end of tool bit 2 is equipped with the end sword 22 of being connected with week sword 21, adjacent two the shaping has chip groove 23 between the week sword 21, chip groove 23 one side is equipped with the rake face 231 towards the smear metal direction of rotation, and the opposite side is equipped with back knife face 232, end sword 22 with the junction of week sword 21 is equipped with additional strengthening 3.
Referring to fig. 2, preferably, the reinforcing structure 3 includes a fillet 31 disposed at an outer end of the end blade 22, and the chip surface 221 of the end blade, the circular arc surface 311 of the fillet, and the outer side surface 211 of the peripheral blade are sequentially connected; the chip surface 221 of the end blade, the circular arc surface 311 of the fillet and the outer side surface 211 of the peripheral blade are connected in sequence, so that the surface smoothness of the end blade 22 and the surface smoothness of the peripheral blade 21 are improved, and the service life is further prolonged. The chip surface 221 of the end edge, the circular arc surface 311 of the fillet and the outer side surface 211 of the peripheral edge are connected through tool linkage grinding, namely, the machining tool is fed along the chip surface 221 of the end edge, the circular arc surface 311 of the fillet and the outer side surface 211 of the peripheral edge in sequence.
Referring to fig. 3, in the present invention, a reinforcing surface 312 is disposed on one side of the circular arc surface 311 of the fillet, which is close to the chip surface 221 of the end edge, a notch 2311 is inwardly disposed on one end of the rake surface 231, which is close to the fillet 31, and in the axial direction of the tool bit 2, the axial length of the reinforcing surface 312 is 2-4% of the radius of the fillet 31, and the axial length of the notch 2311 is 78-82% of the radius of the fillet 31; the service life of the end blade 22 is further improved by the reinforcing surface 312, and the cutting precision of the circular arc surface 311 of the fillet is improved by the inward notch 2311 formed at the end close to the fillet 31 by the rake surface 231, thereby improving the machining precision.
More preferably, the axial length of the reinforcing surface 312 is 2.5-3.5% of the radius of the fillet 31, and the axial length of the notch 2311 is 79-81% of the radius of the fillet 31.
In this embodiment, the axial length of the reinforcing surface 312 is 3% of the radius of the fillet 31, and the axial length of the notch 2311 is 80% of the radius of the fillet 31.
Referring to fig. 3, preferably, the notch 2311 includes a first arc surface 23111 connected with the rake surface 231 in a coplanar manner and a second arc surface 23112 connected with the rake surface 231 in a different plane; the rake face 231 of the chip groove 23 and the first cambered surface 23111 of the notch 2311 are in smooth transition, so that the smoothness of the chip groove 23 is effectively improved, and the chip removal amount is further improved. The first arc surface 23111 is connected with the rake surface 231 and is on the same plane, and the second arc surface 23112 is connected with the rake surface 231 but is not on the same plane.
Referring to fig. 4, preferably, at least four end edges 22 are sequentially provided with an included angle a along the chip rotation direction1、b1、a2、b2,And satisfy the included angle a1、a2Are respectively greater than the included angle b1、b2(ii) a The end blades 22 are arranged in unequal intervals, so that vibration can be inhibited, and the processing stability can be improved.
In the present invention, the included angle a1、a2Is 92-94 degrees and an included angle b1、b2Is 86-88 degrees.
More preferably, the angle a1、a2Is 92.5-93.5 degrees and an included angle b1、b2Is 86.5-87.5 degrees.
In this embodiment, the included angle a1、a2Is 93 degrees and an included angle b1、b2Is 87 deg..
Referring to fig. 5, preferably, the cross section of the chip groove 23 is formed by sequentially connecting three arcs; the cross section of the chip groove 23 is formed by three arc lines which are connected in sequence, so that the chip removal performance of the chip groove 23 is improved.
Preferably, at least four of the peripheral edges 21 are provided with a radial negative rake angle c at one side part close to the chip rotation direction, and at least four of the peripheral edges 21 are provided with a circular arc relief angle at one side part far away from the chip rotation direction; the strength of the edge of the peripheral edge 21 is improved.
Referring to fig. 5, in the present invention, the negative radial rake angle c is in the range of 3 to 10 °. The absolute value of the angle of the negative radial rake angle c with reference to the transverse axis is in the range 3-10 deg., while the negative radial rake angle c is negative with respect to the transverse axis.
More preferably, the negative radial rake angle c is in the range 5-8 °.
In the present embodiment, the negative radial rake angle c is 6 °.
In the utility model, the core thickness of the cutter head 2 is 72-78% of that of the cutter rod 1; improving the rigidity of the tool head 2, reducing the moment of inertia, and further improving the machining accuracy.
More preferably, the core thickness of the tool bit 2 is 74-76% of the core thickness of the tool holder 1.
In this embodiment, the core thickness of the cutting head 2 is 75% of the core thickness of the cutter bar 1.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. The utility model provides a four-edged round nose sword, includes the cutter arbor, the one end of cutter arbor is equipped with the tool bit, the lateral wall of tool bit is equipped with four at least all swords, four at least all swords are followed the link spiral of tool bit extends to the smear metal end of tool bit, the smear metal end of tool bit is equipped with the end sword of being connected with all swords, adjacent two the shaping has the chip groove between the all swords, chip groove one side is equipped with the rake face towards smear metal direction of rotation, and the opposite side is equipped with the back knife face, its characterized in that, the end sword with the junction of all swords is equipped with additional strengthening.
2. The four-edged round noser according to claim 1, wherein the reinforcing structure comprises a fillet provided at an outer end of the end blade, and a chip surface of the end blade, a circular arc surface of the fillet, and an outer side surface of the peripheral blade are connected in this order.
3. The four-edged round noser according to claim 2, wherein the round surface of the round corner is provided with a reinforcing surface on a side close to the chip surface of the end edge, the rake surface is notched inward at an end close to the round corner, and the reinforcing surface has an axial length of 2 to 4% of the radius of the round corner and the notch has an axial length of 78 to 82% of the radius of the round corner in the axial direction of the cutter head.
4. The four-edged round noser according to claim 3, wherein the recess comprises a first curved surface connected coplanar with the rake face and a second curved surface connected non-coplanar with the rake face.
5. Root of herbaceous plantA four-edged round nose tool as claimed in claim 1, wherein at least four of the end edges are provided with an included angle a therebetween in the chip rotation direction1、b1、a2、b2,And satisfy the included angle a1、a2Are respectively greater than the included angle b1、b2。
6. The four-edged round nosepiece according to claim 5, wherein the angle a is1、a2Is 92-94 degrees and an included angle b1、b2Is 86-88 degrees.
7. The four-edged round noser according to claim 1, wherein the cross section of the chip groove is formed by connecting three arc lines in sequence.
8. The four-edged rounded nose tool as set forth in claim 1, wherein at least four of said peripheral edges have a negative radial rake angle c at a side portion thereof closer to the chip rotation direction, and wherein at least four of said peripheral edges have a circular arc rake angle at a side portion thereof farther from the chip rotation direction.
9. The four-edged rounded nose piece as claimed in claim 8, wherein the negative radial rake angle c is in the range of 3 to 10 °.
10. A four-edged round nosepiece according to claim 1, wherein the core thickness of the cutting head is 72-78% of the core thickness of the cutter shank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122653887.2U CN216176984U (en) | 2021-11-02 | 2021-11-02 | Four-edge round nose knife |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122653887.2U CN216176984U (en) | 2021-11-02 | 2021-11-02 | Four-edge round nose knife |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216176984U true CN216176984U (en) | 2022-04-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122653887.2U Active CN216176984U (en) | 2021-11-02 | 2021-11-02 | Four-edge round nose knife |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216176984U (en) |
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2021
- 2021-11-02 CN CN202122653887.2U patent/CN216176984U/en active Active
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