CN219234061U - Stepped twist drill with chip breaker - Google Patents
Stepped twist drill with chip breaker Download PDFInfo
- Publication number
- CN219234061U CN219234061U CN202320213166.6U CN202320213166U CN219234061U CN 219234061 U CN219234061 U CN 219234061U CN 202320213166 U CN202320213166 U CN 202320213166U CN 219234061 U CN219234061 U CN 219234061U
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- drill
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- chip
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The utility model discloses a stepped twist drill with chip breaking grooves, and relates to the technical field of drills. The chip removing device comprises a cylindrical main body, wherein the front end of the cylindrical main body is provided with a cone part, and the outer side surface of the cylindrical main body is provided with a spiral groove for chip removal; the most tip of the cone part is provided with a drill tip top edge; a cutting edge is formed at the junction of the outer side surface of the cone part and the rear side of the spiral groove; the outer side surface of the cone part is provided with a plurality of cylindrical surfaces and conical surfaces with sequentially enlarged diameters from the front end to the tail end in a staggered manner; the cutting edges are divided into composite cutting edges by the cylindrical surfaces and the conical surfaces; the cylindrical surface is provided with a chip breaker groove. According to the utility model, the scrap iron of the processed material is broken and rapidly leaves the drill by arranging the chip breaker, so that the scrap iron of the processed material is prevented from being adhered to the drill, the heat dissipation performance of the drill is better, and the wear resistance is improved.
Description
Technical Field
The utility model relates to the technical field of drills, in particular to a stepped twist drill with chip breaking grooves.
Background
The twist drill with the conventional structure is characterized in that two symmetrically distributed linear cutting edges simultaneously finish machining of metal cutting quantity with corresponding dimensions when drilling is carried out, so that the required power is high when drilling is carried out, and the reaction force on two cutting edges is also high, so that the cutting edges are easy to damage. At present, a stepped twist drill appears on the market, and is easy to position in the working process of layered drilling through stepped cutting, small in cutting resistance, less in cutting heating, high in drilling efficiency and long in service life, the drilling performance of the drill bit is greatly improved, and the processed round hole is high in precision and less in burrs at the cutting edge; is highly appreciated by those skilled in the art of machining.
For example, chinese patent publication No. CN110802259a discloses a twist drill, in which a cone portion is disposed at the front end of a working portion, and a spiral groove for shunting, cutting and chip removing is disposed on the outer side surface of the working portion; the outer side surface of the cone part is provided with a plurality of groups of composite cutting edges with diameters sequentially increased from the front end to the tail end, and the most tip of the cone part is provided with a drill tip top edge. When the combined cutting tool is used, the drill tip top edge can play a role in initial positioning, and the cutting process is completed by the drill tip top edge and a plurality of groups of combined cutting edges. Although the stepped twist drill improves the drilling efficiency, the length of the cutting edge is prolonged in a phase-changing manner, so that the scrap iron is increased in width, blocked in chip removal and poor in chip breaking effect during cutting, and the scrap iron is easily adhered to a drill bit for materials with high viscosity such as stainless steel, so that the heat dissipation effect and the wear resistance are affected.
Disclosure of Invention
The utility model mainly aims to provide a stepped twist drill with chip breaking grooves so as to solve the problems.
In order to achieve the above purpose, the utility model provides a stepped twist drill with chip breaking grooves, which comprises a cylindrical main body, wherein the front end of the cylindrical main body is provided with a cone part, and the outer side surface of the cylindrical main body is provided with a spiral groove for chip removal; the most tip of the cone part is provided with a sharp-tipped drill; a cutting edge is formed at the junction of the outer side surface of the cone part and the rear side of the spiral groove; the outer side surface of the cone part is provided with a plurality of cylindrical surfaces and conical surfaces with sequentially enlarged diameters in a staggered manner from the front end to the tail end; the cutting edges are divided into composite cutting edges by the cylindrical surfaces and the conical surfaces; the cylindrical surface is provided with a chip breaker groove.
Further, the chip breaker is provided with a plurality of chip breakers.
Further, the chip breaker groove is perpendicular to the central axis of the cylindrical body.
Further, the cross section of the chip breaker groove is arc-shaped.
The utility model has the following beneficial effects:
according to the utility model, the scrap iron of the processed material is broken and rapidly leaves the drill by arranging the chip breaker, so that the scrap iron of the processed material is prevented from being adhered to the drill, the heat dissipation performance of the drill is better, and the wear resistance is improved.
Drawings
FIG. 1 is a schematic view of a stepped twist drill with chip breaker according to the present utility model;
fig. 2 is an enlarged view at K of fig. 1.
In the figure: 1-a cylindrical body; 2-helical grooves; 3-a composite cutting edge; 4-a drill tip top edge; 5-a cylindrical surface; 6-conical surface; 7-chip breaking grooves.
Detailed Description
In order to achieve the above objects and effects, the present utility model adopts the technical means and structure, and the features and functions of the preferred embodiments of the present utility model will be described in detail with reference to the accompanying drawings.
As shown in fig. 1-2, the utility model provides a stepped twist drill with chip breaking grooves, which comprises a cylindrical main body 1, wherein the front end of the cylindrical main body 1 is provided with a cone part, and the outer side surface of the cylindrical main body 1 is provided with a spiral groove 2 for chip removal; the most tip of the cone part is provided with a sharp-tipped drill 4; a cutting edge is formed at the junction of the outer side surface of the cone part and the rear side of the spiral groove; the outer side surface of the cone part is provided with a plurality of cylindrical surfaces 5 and conical surfaces 6 with sequentially enlarged diameters in a staggered manner from the front end to the tail end; the cutting edges are divided into a plurality of cylindrical surfaces 5 and conical surfaces 6 to form a composite cutting edge 3; the cylindrical surface 5 is provided with chip breaking grooves 7. Through setting up chip breaker 7, make the scrap iron of processed material abandonment fracture, leave the drill bit rapidly to the scrap iron of the material of avoiding being processed bonds on the drill bit, makes drill bit heat dispersion better, increases the wearability.
In another embodiment, a plurality of chip breakers 7 are provided, and a plurality of chip breakers 7 may be provided on the same cylindrical surface 5 or may be provided on a plurality of cylindrical surfaces 5 respectively. The chip breaking capacity and the chip removal capacity are improved by the plurality of chip breaking grooves 7.
In another embodiment, the chip breaker 7 is perpendicular to the central axis of the cylindrical body 1 to provide better chip breaking capacity.
In another embodiment, the cross section of the chip breaker groove 7 is in a circular arc shape or other forms, preferably in a circular arc shape, so as to facilitate processing and chip removal.
The foregoing description is only illustrative of the preferred embodiment, and is not intended to limit the scope of the utility model in any way.
Claims (4)
1. The stepped twist drill with the chip breaking grooves is characterized by comprising a cylindrical main body, wherein the front end of the cylindrical main body is provided with a cone part, and the outer side surface of the cylindrical main body is provided with a spiral groove for removing chips; the most tip of the cone part is provided with a sharp-tipped drill; a cutting edge is formed at the junction of the outer side surface of the cone part and the rear side of the spiral groove; the outer side surface of the cone part is provided with a plurality of cylindrical surfaces and conical surfaces with sequentially enlarged diameters in a staggered manner from the front end to the tail end; the cutting edges are divided into composite cutting edges by the cylindrical surfaces and the conical surfaces; the cylindrical surface is provided with a chip breaker groove.
2. The fluted stepped twist drill of claim 1 wherein said flutes are provided in a plurality.
3. A stepped twist drill with chip breaker according to claim 1 or 2, wherein the chip breaker is perpendicular to the central axis of the cylindrical body.
4. The fluted stepped twist drill of claim 1 wherein said flutes are circular in cross-section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320213166.6U CN219234061U (en) | 2023-02-14 | 2023-02-14 | Stepped twist drill with chip breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320213166.6U CN219234061U (en) | 2023-02-14 | 2023-02-14 | Stepped twist drill with chip breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219234061U true CN219234061U (en) | 2023-06-23 |
Family
ID=86811355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320213166.6U Active CN219234061U (en) | 2023-02-14 | 2023-02-14 | Stepped twist drill with chip breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219234061U (en) |
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2023
- 2023-02-14 CN CN202320213166.6U patent/CN219234061U/en active Active
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