CN203578868U - Improved drill bit with long-short chip discharging groove structure - Google Patents
Improved drill bit with long-short chip discharging groove structure Download PDFInfo
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- CN203578868U CN203578868U CN201320808293.7U CN201320808293U CN203578868U CN 203578868 U CN203578868 U CN 203578868U CN 201320808293 U CN201320808293 U CN 201320808293U CN 203578868 U CN203578868 U CN 203578868U
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- drill bit
- chip discharging
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- long
- improved
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Abstract
The utility model relates to an improved drill bit with a long-short chip discharging groove structure. The improved drill bit comprises a drill handle and a cutting part. The cutting part is provided with two symmetrical main cutting blades and corresponding spiral chip discharging grooves. The improved drill bit is characterized in that gaps are formed in the outer side edges of lands of the main cutting blades in a concave mode, and the chip discharging grooves are divided into a first chip discharging long groove and a second chip discharging short groove. The improved drill bit has the advantages that the rigidness and the strength of the drill bit can be well improved through the arrangement of the long-short chip discharging grooves, and bit breaking rate is lowered; and the gaps are formed in the outer side edges of the lands in the concave mode, so that contact between the bit and a machined plate can be lowered, and machining quality can be improved.
Description
Technical field
The utility model relates to a kind of trickle drill bit, especially relates to a kind of modified form drill bit with length debris discharging chute structure.
Background technology
Trickle drill bit is in the process of machining pcb board material, easily there is broken needle, unstability and the bad situation of position, hole precision, for preventing the generation of these situations, adopt a kind of length groove structure of improvement to reduce broken needle rate, reduce de-stabilise and improve position, hole precision to increase drill bit intensity.
Utility model content
The purpose of this utility model be for prior art weak point, provide that a kind of intensity is high, the modified form drill bit with length debris discharging chute structure of good rigidity, long service life.
The purpose of this utility model is to realize by following measures: a kind of modified form drill bit with length debris discharging chute structure, comprise drillstock, cutting tip, described cutting tip has two symmetrical main cutting edges and corresponding helical flute, it is characterized in that, the land lateral border of described main cutting edge is concaved with gap, and described helical flute is divided into the first chip removal elongated slot, the short groove of the second chip removal.
The described degree of depth that is arranged with gap is bit diameter 1～40%.
The length of the short groove of described the second chip removal is 20～90% of the first chip removal elongated slot length.
Compared with prior art, the modified form drill bit with length debris discharging chute structure the utility model proposes, tool has the following advantages: 1) being provided with of length chip area is beneficial to rigidity and the intensity that increases drill point, reduce broken needle rate, when the thick size of the drill bit heart at suitable adjustment drill flute position and the gap size of lateral border contribute to hole according to demand, increase the quick discharge of chip removal space and scrap simultaneously, avoid producing amassing and cut and twine a phenomenon; 2) land lateral border is arranged with gap and can reduces contacting between drill bit and machining sheet, improves processing quality.
Accompanying drawing explanation
Fig. 1 is the embodiment elevational schematic view the utility model proposes.
Fig. 2 is the front view of Fig. 1 embodiment.
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment is elaborated: Fig. 1～Fig. 2 illustrates an embodiment of the present utility model, in figure, a kind of modified form drill bit 1 with length debris discharging chute structure comprises: drillstock 11, cutting tip 12, described cutting tip has two symmetrical main cutting edges 13 and corresponding helical flute 15.The land lateral border of described main cutting edge 13 is concaved with gap 14, and the degree of depth that is arranged with gap is bit diameter 1～40%, is arranged with arranging of gap and can reduces contacting between drill bit and machining sheet, guarantees the quality of hole wall, improves processing quality.Described helical flute is divided into the first chip removal elongated slot 152, the short groove 151 of the second chip removal, the length of the short groove 151 of described the second chip removal is 20～90% of the first chip removal elongated slot 152 length, by two different lengths of cutting tip 12, the chip area 15 of same-handed angle, can increase rigidity and the intensity of drill bit, reduce the phenomenon of rupture of drill bit when drilling operation, can be by regulating the thick size of the heart and helical angle size to guarantee the quick chip removal of cutting, reduce drill bit 1 and twine a phenomenon when drilling operation, make the hole quality of drilling better.
Embodiment of the present utility model has been described above by reference to the accompanying drawings; the structure that embodiment provides does not form restriction of the present utility model, and in this area, those skilled in the art make within the scope of the appended claims various distortion or revise all in protection domain.
Claims (3)
1. a modified form drill bit with length debris discharging chute structure, comprise drillstock, cutting tip, described cutting tip has two symmetrical main cutting edges and corresponding helical flute, it is characterized in that, the land lateral border of described main cutting edge is concaved with gap, and described helical flute is divided into the first chip removal elongated slot, the short groove of the second chip removal.
2. the modified form drill bit with length debris discharging chute structure according to claim 1, is characterized in that, described in to be arranged with the degree of depth in gap be bit diameter 1～40%.
3. the modified form drill bit with length debris discharging chute structure according to claim 1 and 2, is characterized in that, the length of the short groove of described the second chip removal is 20～90% of the first chip removal elongated slot length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320808293.7U CN203578868U (en) | 2013-12-10 | 2013-12-10 | Improved drill bit with long-short chip discharging groove structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320808293.7U CN203578868U (en) | 2013-12-10 | 2013-12-10 | Improved drill bit with long-short chip discharging groove structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203578868U true CN203578868U (en) | 2014-05-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320808293.7U Expired - Fee Related CN203578868U (en) | 2013-12-10 | 2013-12-10 | Improved drill bit with long-short chip discharging groove structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203578868U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104439432A (en) * | 2014-11-27 | 2015-03-25 | 苏州阿诺精密切削技术股份有限公司 | J-shaped seamed edge correction auger bit |
| CN105562788A (en) * | 2015-11-04 | 2016-05-11 | 深圳市金洲精工科技股份有限公司 | Drill bit for drilling PCB |
| CN110170686A (en) * | 2019-05-07 | 2019-08-27 | 深圳市金洲精工科技股份有限公司 | A kind of microbit |
-
2013
- 2013-12-10 CN CN201320808293.7U patent/CN203578868U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104439432A (en) * | 2014-11-27 | 2015-03-25 | 苏州阿诺精密切削技术股份有限公司 | J-shaped seamed edge correction auger bit |
| CN105562788A (en) * | 2015-11-04 | 2016-05-11 | 深圳市金洲精工科技股份有限公司 | Drill bit for drilling PCB |
| CN110170686A (en) * | 2019-05-07 | 2019-08-27 | 深圳市金洲精工科技股份有限公司 | A kind of microbit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140507 Termination date: 20201210 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |