CN215746589U - Prevent that bulge's ladder from appearing in thin wall spare and bore - Google Patents
Prevent that bulge's ladder from appearing in thin wall spare and bore Download PDFInfo
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- CN215746589U CN215746589U CN202120082413.4U CN202120082413U CN215746589U CN 215746589 U CN215746589 U CN 215746589U CN 202120082413 U CN202120082413 U CN 202120082413U CN 215746589 U CN215746589 U CN 215746589U
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- cutting edge
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Abstract
The utility model discloses a stepped drill for preventing a thin-wall part from bulging, which comprises a cutting part and a handle part, wherein the cutting part is provided with a drill point, a first cutting edge, a second cutting edge and a stepped cutting edge, the drill point is arranged in the middle of the head part of the cutting part, the first cutting edge is arranged on two sides of the drill point, the second cutting edge is arranged adjacent to the first cutting edge, an included angle formed by the first cutting edge and a horizontal central axis is 40-45 degrees, an included angle formed by the second cutting edge and the horizontal central axis is 70-75 degrees, the stepped cutting edge is arranged in the middle of the cutting part, a chip discharge groove spirally extends to the tail part of the cutting part from the second cutting edge, and the solid part forming the chip discharge groove is a tool back. The drill point, the first cutting edge and the second cutting edge form a double-vertex-angle structure, the extremely high centering effect is guaranteed, meanwhile, the cutting force is greatly reduced, the drill point is high in strength, the cutting edge is sharp, the wear-resisting performance is good, the probability of the edge breaking of the cutter is reduced, and the situation that the thin-wall part bulges or cracks is reduced.
Description
Technical Field
The utility model relates to the technical field of cutters, in particular to a step drill capable of preventing a thin-wall part from bulging.
Background
Although the structure and the gap of the iron-based powder metallurgy material are more uniform than those of a casting material, the shock absorption and wear-resistant effects are better, the hardness is not high, but the material is more brittle, cracks or bulges can appear as long as a cutter is slightly collapsed or not sharp during processing, so that a workpiece is scrapped, the cutter used by a client originally is used for processing 1500 cutters, so that the cutter is seriously worn, the workpiece outlet is caused to bulge, the cutter needs to be replaced, and the processing cost of the workpiece is higher.
Therefore, a step drill for preventing the bulge of the thin-wall part is needed to solve the defects in the prior art.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: in view of the problems and deficiencies of the prior art as discussed above, it is an object of the present invention to provide a step drill that prevents bulging of thin wall parts. The drill point has high strength, sharp cutting edge and good wear resistance, the probability of tipping of the cutter is reduced, and the condition that the thin-wall part bulges or cracks is reduced.
The technical scheme is as follows: in order to achieve the purpose, the stepped drill for preventing the bulging of the thin-wall part comprises a cutting part and a handle part, wherein the cutting part is provided with a drill point, a first cutting edge, a second cutting edge and a stepped cutting edge, the drill point is arranged in the middle of the head part of the cutting part, the first cutting edge is arranged on two sides of the drill point, the second cutting edge is arranged adjacent to the first cutting edge, an included angle formed by the first cutting edge and a horizontal central axis is 40-45 degrees, an included angle formed by the second cutting edge and the horizontal central axis is 70-75 degrees, the stepped cutting edge is arranged in the middle of the cutting part, a chip discharge groove spirally extends to the tail part of the cutting part from the second cutting edge, and the solid part forming the chip discharge groove is a tool back.
Furthermore, a blade zone is arranged on the knife back, and the width of the blade zone is 0.1 time of the diameter. The design of widening the cutting edge increases the stability of the cutter during processing and ensures the drilling effect.
Further, the angle of the drill tip is 90 °.
Further, the included angle formed by the stepped cutting edge and the horizontal central axis is 45 degrees.
Further, the blade and the shank are integrally formed.
Further, a wear-resistant coating is arranged on the blade part. Guarantee the super high wearability of cutter, can not reduce blade sharpness simultaneously.
According to the technical scheme, the utility model has the beneficial effects that:
according to the stepped drill for preventing the bulge of the thin-wall part, the drill point, the first cutting edge and the second cutting edge form a double-vertex-angle structure, the extremely high centering effect is ensured, the cutting force is greatly reduced, the strength of the drill point is high, the cutting edge is sharp, the wear resistance is good, the probability of the edge breakage of the cutter is reduced, and the bulge or crack of the thin-wall part is reduced.
Drawings
FIG. 1 is a front view of the present invention;
fig. 2 is a schematic structural diagram of a first blade and a second blade of the present invention.
Detailed Description
The utility model is further elucidated with reference to the drawings and the embodiments.
The stepped drill for preventing the bulge of the thin-wall part comprises a cutting part 1 and a handle part 2, wherein the cutting part 1 is provided with a drill tip 11, a first cutting edge 12, a second cutting edge 13 and a stepped cutting edge 14, the drill tip 11 is arranged in the middle of the head part of the cutting part 1, the first cutting edge 12 is arranged on two sides of the drill tip, the second cutting edge 13 is arranged adjacent to the first cutting edge 12, an included angle formed by the first cutting edge 12 and a horizontal central axis is 40-45 degrees, an included angle formed by the second cutting edge 13 and the horizontal central axis is 70-75 degrees, the stepped cutting edge 14 is arranged in the middle of the cutting part 1, a chip discharge groove 15 spirally extends to the tail part of the cutting part 1 from the second cutting edge 13, and a solid part forming the chip discharge groove 15 is a tool back 16.
Wherein, the back of a knife 16 is equipped with the margin 161, the width of margin 161 is 0.1 times diameter.
The angle of the drill tip 11 is 90 ° in this embodiment.
In this embodiment, the angle between the stepped cutting edge 14 and the horizontal central axis is 45 °.
In the present embodiment, the blade 1 and the shank 2 are integrally formed.
In this embodiment, the blade portion 1 is provided with a wear-resistant coating.
The examples are given solely for the purpose of illustration and are not to be construed as limitations of the present invention, as various equivalents will occur to those skilled in the art upon reading the present invention and are intended to be within the scope of the utility model as defined in the claims appended hereto.
Claims (6)
1. The utility model provides a prevent that thin wall spare from appearing the ladder of bulge bores which characterized in that: including cutting part (1), stalk portion (2), cutting part (1) is equipped with drill point (11), cutting edge (12), cutting edge two (13) and ladder cutting edge (14), drill point (11) set up in the middle of the head of cutting part (1), and cutting edge (12) set up in the both sides of drill point, and cutting edge two (13) and cutting edge (12) adjacent setting, cutting edge one (12) is 40 ~45 with horizontal central axis contained angle, cutting edge two (13) and horizontal central axis contained angle be 70 ~75, and ladder cutting edge (14) set up the intermediate position at cutting part (1), and chip groove (15) are followed cutting edge two (13) and are located the spiral and extend to cutting part (1) afterbody, and the entity part that forms chip groove (15) is back of a knife blade (16).
2. The stepped drill for preventing bulging of a thin-walled part according to claim 1, wherein: the knife back (16) is provided with a cutting edge (161), and the width of the cutting edge (161) is 0.1 time of the diameter.
3. The stepped drill for preventing bulging of a thin-walled part according to claim 1, wherein: the angle of the drill tip (11) is 90 degrees.
4. The stepped drill for preventing bulging of a thin-walled part according to claim 1, wherein: the included angle formed by the stepped cutting edge (14) and the horizontal central axis is 45 degrees.
5. The stepped drill for preventing bulging of a thin-walled part according to claim 1, wherein: the blade part (1) and the handle part (2) are integrally formed.
6. The stepped drill for preventing bulging of a thin-walled part according to claim 1, wherein: the blade part (1) is provided with a wear-resistant coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120082413.4U CN215746589U (en) | 2021-01-13 | 2021-01-13 | Prevent that bulge's ladder from appearing in thin wall spare and bore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120082413.4U CN215746589U (en) | 2021-01-13 | 2021-01-13 | Prevent that bulge's ladder from appearing in thin wall spare and bore |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215746589U true CN215746589U (en) | 2022-02-08 |
Family
ID=80070832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120082413.4U Active CN215746589U (en) | 2021-01-13 | 2021-01-13 | Prevent that bulge's ladder from appearing in thin wall spare and bore |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215746589U (en) |
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2021
- 2021-01-13 CN CN202120082413.4U patent/CN215746589U/en active Active
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