CN214392488U - Annular cutter for drilling composite material - Google Patents
Annular cutter for drilling composite material Download PDFInfo
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- CN214392488U CN214392488U CN202022892942.9U CN202022892942U CN214392488U CN 214392488 U CN214392488 U CN 214392488U CN 202022892942 U CN202022892942 U CN 202022892942U CN 214392488 U CN214392488 U CN 214392488U
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Abstract
The utility model discloses an annular cutter for drilling composite materials, which comprises a round bar-shaped main body; one end of the round bar-shaped main body is provided with a cutting part, the other end is provided with a clamping part, and the middle part is provided with a transition part; the cutting part and the transition part are both of hollow groove structures, and at least one cutting edge is arranged at the end part of one end of the round bar-shaped main body along the circumferential direction; when the number of the cutting edges is multiple, each cutting edge is equal in edge height and unequal in edge width; the cutting edge is provided with a front cutter face and a rear cutter face, and a working front angle and a working rear angle are formed correspondingly; the cutting edge and the horizontal direction form a certain included angle to form a reverse taper angle; the front tool face of the cutting edge is provided with a multi-stage chip groove structure so as to facilitate chip discharge. The utility model overcomes prior art's drill bit bores the big shortcoming of core position cutting resistance, can effectively reduce drilling axial force, avoids the drill bit easily to produce defects such as export burr, interlaminar layering and fibre crackle, and specially adapted thin wall part hole site processing can effectively reduce the processing and shimmy.
Description
Technical Field
The utility model relates to a cutter manufacturing and designing field especially relates to a be used for combined material annular cutter for drilling.
Background
With the vigorous development of the aerospace industry, fiber reinforced composite materials are widely used due to the advantages of high specific strength, corrosion resistance, wear resistance and the like. However, due to the characteristics of high hardness, low interlayer strength, anisotropy and the like of the composite material, defects such as outlet burrs, delamination, fiber tearing and the like are easily caused during the processing of the traditional hard alloy drill bit, and when a thin-wall part with weaker rigidity is processed, the processing flutter is easily caused by larger axial force, so that the processing quality and the service life of a cutter are influenced. Chinese patent CN103658771B discloses a mechanically-clamped hard alloy trepanning drill bit, which is a sleeve-shaped cutter body provided with an indexable hard alloy blade for trepanning processing, wherein the specification of the mounted blade is fixed, and the structure is limited; chinese patents CN108942716B, CN108839106A and CN204209192U are all diamond abrasive grains which are distributed on an annular substrate and belong to grinding processing tools; chinese patent CN203565940U discloses a trepanning drill for machining honeycomb sandwich composite material, which is a drill bushing guiding combination tool and is not specially designed for cutting edge width and chip pocket. The cutters have the defects of large cutting resistance of the drill core part of the drill bit, easy generation of outlet burrs, interlayer delamination, fiber cracks and the like, and the machining flutter is easily caused by the machining amount of hole positions of thin-wall parts, so that the machining quality and the service life of the cutters are greatly influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, provide one kind and be used for combined material annular cutter for drilling, through the institutional advancement to cutting edge portion, overcome prior art's the big shortcoming of drill bit drill core position cutting resistance, can effectively reduce the drilling axial force, avoid the drill bit easily to produce defects such as export burr, layer-to-layer layering and fibre crackle, specially adapted thin wall part hole site processing can effectively reduce the processing and shake.
The utility model provides a technical scheme that its technical problem adopted is: an annular cutter for composite material drilling, comprising a round bar-shaped body; one end of the round bar-shaped main body is provided with a cutting part, the other end is provided with a clamping part, and the middle part is provided with a transition part; the cutting part and the transition part are both of hollow groove structures, and at least one cutting edge is arranged at the end part of one end of the round bar-shaped main body along the circumferential direction; when the number of the cutting edges is multiple, each cutting edge is equal in edge height and unequal in edge width; the cutting edge is provided with a front cutter face and a rear cutter face, and a working front angle and a working rear angle are formed correspondingly; the cutting edge and the horizontal direction form a certain included angle to form a reverse taper angle; the front tool face of the cutting edge is provided with a multi-stage chip groove structure so as to facilitate chip discharge.
The width of the cutting edge is gradually reduced along the circumferential direction, and the maximum width of different cutting edges is also gradually reduced along the circumferential direction, so that clearance between the cutter and the workpiece is formed.
The end of one end of the round bar-shaped main body is provided with 1-5 cutting edges along the circumferential direction.
The working rake angle is-5 to 10 degrees.
The working relief angle is 5-12 degrees.
The inverted cone angle of the cutting edge is 0.5-3 degrees.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model adopts the structure that the cutting part and the transition part are hollow groove positions, and at least one cutting edge is arranged at the end part of one end of the round bar-shaped main body along the circumferential direction; when the number of the cutting edges is multiple, each cutting edge is equal in edge height and unequal in edge width; the cutting edge is provided with a front cutter face and a rear cutter face, and a working front angle and a working rear angle are formed correspondingly; the cutting edge and the horizontal direction form a certain included angle to form a reverse taper angle; the front cutter face of the cutting edge is provided with a multistage chip groove structure. The utility model discloses a shortcoming that prior art's drill bit bore core position cutting resistance is big has been overcome to this kind of structure, can effectively reduce drilling axial force, avoids the drill bit easily to produce defects such as export burr, layer layering and fibre crackle between the layer, and specially adapted thin wall part hole site processing can effectively reduce the processing and shimmy.
The present invention will be described in further detail with reference to the accompanying drawings and examples; however, the present invention is not limited to the embodiments described above.
Drawings
Fig. 1 is a schematic structural view of an embodiment of the present invention;
fig. 2 is a schematic structural view of a cutting portion according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;
fig. 4 is a schematic view of the distribution of cutting edges according to an embodiment of the present invention.
In the figure, 1: a cutting portion of the round bar-shaped body; 2: a transition portion of the round bar-shaped body; 3: a clamping portion of the round bar-shaped body; 11: a rake face of the cutting portion; 12: a cutting edge of the cutting portion; 13: a flank face of the cutting portion; 14: a knife tip; 15: a multi-stage chip pocket; and Po: an orthogonal plane of the main cutting edge; α: working relief angle; γ: working rake angle; psi: a reverse taper angle; d: the rotating diameter of the annular cutter is also the diameter of a processing hole; h1, h2, h3 are the three cutting edges maximum width, respectively.
Detailed Description
Examples
As shown in fig. 1 to 4, the present invention relates to an annular cutter for composite material drilling, which comprises a round bar-shaped main body; one end of the round bar-shaped body is provided with a cutting part 1, the other end is provided with a clamping part 3, and the middle part is provided with a transition part 2; the cutting part 1 and the transition part 2 are both of hollow groove structures, and at least one cutting edge 12 is arranged at the end part of one end of the round bar-shaped main body along the circumferential direction; when there are a plurality of cutting edges 12, each cutting edge 12 has an equal cutting height and an unequal cutting width; the cutting edge 12 has a rake face 11, a flank face 13 and a nose 14, respectively forming a working rake angle γ and a working relief angle α; the cutting edge 12 forms a certain included angle with the horizontal direction to form an inverted cone angle psi; the front face of the cutting edge is provided with a multi-stage chip groove structure 15 so as to facilitate chip discharge, and the chip groove is set to be 2 stages in the embodiment.
The end part of one end of the round bar-shaped main body is provided with 1-5 cutting edges along the circumferential direction; the number of the cutting edges is selected according to the diameter of the cutter and the machining working condition, and in the embodiment, the number of the cutting edges is 3.
The width of the cutting edge (namely the width of the cutting edge) is gradually reduced along the circumferential direction, and the maximum width of different cutting edges is also gradually reduced along the circumferential direction, so that clearance between the cutter and the workpiece is formed. In the embodiment, the number of the cutting edges is 3, the cutting edges are respectively provided with a first edge, a second edge and a third edge along the circumferential direction, the width of each cutting edge is gradually reduced along the circumferential direction, the maximum width of the first edge is h1, and the width is gradually reduced along the circumferential direction; the maximum width of the second edge is h2, and the width gradually decreases along the circumferential direction; the maximum width of the third edge is h3, and the width gradually decreases along the circumferential direction; the maximum widths of different cutting edges are gradually reduced along the circumferential direction, namely h1 is larger than h2 is larger than h3, in the embodiment, h1 is 1.2mm, h2 is 1.0mm, h3 is 0.8mm, and the design of changing the edge width can form clearance between the tool revolution surface and the workpiece revolution surface, so that the cutting resistance and the workpiece deformation are reduced.
The diameter of the round bar-shaped main body and the diameter D of revolution of the annular cutting edge can be adjusted according to the diameter of a processing hole site, in the embodiment, the diameter D of revolution of the cutting edge is 12mm, and the diameter of the bar-shaped main body and the diameter of revolution of the annular cutting edge can be different.
The working rake angle is-5-10 degrees, the specific value of the working rake angle is determined by cutting edge materials and workpiece materials, the working rake angle is too small, the cutting edge of the trepanning drill is not sharp enough, the cutting heat is improved, the chip breaking and removing capacity is reduced, the stress and heat concentration of the tool nose are caused by too large value, the cutting edge is damaged, and the cutting edge fails in advance.
The working relief angle is 5-12 degrees, the specific value of the working relief angle is determined by the surface quality of the cutting edge material and the inner hole of the workpiece, the working relief angle is too small, the wear value of the rear cutter face of the cutting edge is increased and becomes fast, the service life of the trepanning drill is reduced, the contact area between the rear cutter face of the cutting edge and the inner hole of the workpiece is reduced due to too large value, and the surface quality of the inner hole is reduced.
The inverted cone angle of the cutting edge is 0.5-3 degrees, the specific value of the inverted cone angle is determined by a cutting edge material and a workpiece material, the length of the cutting edge participating in cutting work can be increased when the inverted cone angle is too small, the friction force is increased, vibration is easy to cause, the strength of the tool tip of the cutting edge can be reduced when the inverted cone angle is too large, the heat dissipation condition is worsened, and the service life of the trepanning drill is shortened.
The utility model discloses an annular cutter for drilling composite materials, which adopts a hollow groove structure of a cutting part 1 and a transition part 2, and at least one cutting edge 12 is arranged at the end part of one end of a round bar-shaped main body along the circumferential direction; when there are a plurality of cutting edges 12, each cutting edge 12 has an equal cutting height and an unequal cutting width; the cutting edge 12 has a rake face 11 and a flank face 13, respectively forming an operative rake angle γ and an operative relief angle α; the cutting edge 12 forms a certain included angle with the horizontal direction to form an inverted cone angle psi; the cutting edge rake face 11 is provided with a multi-stage chip flute structure 15. The utility model discloses a shortcoming that prior art's drill bit bore core position cutting resistance is big has been overcome to this kind of structure, can effectively reduce drilling axial force, avoids the drill bit easily to produce defects such as export burr, layer layering and fibre crackle between the layer, and specially adapted thin wall part hole site processing can effectively reduce the processing and shimmy.
The foregoing is illustrative of the preferred embodiment of the present invention and is not to be construed as limiting the invention in any way. Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. The technical solutions disclosed above can be used by those skilled in the art to make many possible variations and modifications, or to modify equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical entity of the present invention should fall within the protection scope of the technical solution of the present invention.
Claims (6)
1. An annular cutter for composite material drilling, comprising a round bar-shaped body; one end of the round bar-shaped main body is provided with a cutting part, the other end is provided with a clamping part, and the middle part is provided with a transition part; the method is characterized in that: the cutting part and the transition part are both of hollow groove structures, and at least one cutting edge is arranged at the end part of one end of the round bar-shaped main body along the circumferential direction; when the number of the cutting edges is multiple, each cutting edge is equal in edge height and unequal in edge width; the cutting edge is provided with a front cutter face and a rear cutter face, and a working front angle and a working rear angle are formed correspondingly; the cutting edge and the horizontal direction form a certain included angle to form a reverse taper angle; the front tool face of the cutting edge is provided with a multi-stage chip groove structure so as to facilitate chip discharge.
2. The annular cutter for composite material drilling as claimed in claim 1, wherein: the width of the cutting edge is gradually reduced along the circumferential direction, and the maximum width of different cutting edges is also gradually reduced along the circumferential direction, so that clearance between the cutter and the workpiece is formed.
3. The annular cutter for composite material drilling as claimed in claim 1, wherein: the end of one end of the round bar-shaped main body is provided with 1-5 cutting edges along the circumferential direction.
4. The annular cutter for composite material drilling as claimed in claim 1, wherein: the working rake angle is-5 to 10 degrees.
5. The annular cutter for composite material drilling as claimed in claim 1, wherein: the working relief angle is 5-12 degrees.
6. The annular cutter for composite material drilling as claimed in claim 1, wherein: the inverted cone angle of the cutting edge is 0.5-3 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022892942.9U CN214392488U (en) | 2020-12-03 | 2020-12-03 | Annular cutter for drilling composite material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022892942.9U CN214392488U (en) | 2020-12-03 | 2020-12-03 | Annular cutter for drilling composite material |
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| Publication Number | Publication Date |
|---|---|
| CN214392488U true CN214392488U (en) | 2021-10-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022892942.9U Active CN214392488U (en) | 2020-12-03 | 2020-12-03 | Annular cutter for drilling composite material |
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| CN (1) | CN214392488U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113927069A (en) * | 2021-11-09 | 2022-01-14 | 浙江汇丰汽车零部件股份有限公司 | Drill bit structure |
| CN114083001A (en) * | 2021-10-20 | 2022-02-25 | 厦门金鹭特种合金有限公司 | Laminated material thin plate hole machining tool |
-
2020
- 2020-12-03 CN CN202022892942.9U patent/CN214392488U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114083001A (en) * | 2021-10-20 | 2022-02-25 | 厦门金鹭特种合金有限公司 | Laminated material thin plate hole machining tool |
| CN114083001B (en) * | 2021-10-20 | 2022-12-30 | 厦门金鹭特种合金有限公司 | Laminated material thin plate hole machining tool |
| CN113927069A (en) * | 2021-11-09 | 2022-01-14 | 浙江汇丰汽车零部件股份有限公司 | Drill bit structure |
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