CN201862823U - Drill for processing sheets - Google Patents
Drill for processing sheets Download PDFInfo
- Publication number
- CN201862823U CN201862823U CN2010205865819U CN201020586581U CN201862823U CN 201862823 U CN201862823 U CN 201862823U CN 2010205865819 U CN2010205865819 U CN 2010205865819U CN 201020586581 U CN201020586581 U CN 201020586581U CN 201862823 U CN201862823 U CN 201862823U
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- drill bit
- drill
- edge
- cutting edge
- blade tip
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Abstract
A drill for processing sheets comprises a drillstock and a drill bit. A cutting edge of the drill bit is an arc-shaped edge, an edge tip is arranged at the arc-shaped upper end of the cutting edge, and a drilling tip on a cross edge of the drill bit is higher than the edge tip relative to an end point of the lower end of the drillstock. Holes processed by the drill for processing sheets meet requirements, are round and neat and have smooth surfaces. Cutting property of the drill bit after being sharpened is greatly increased, durability of a knife is improved greatly, surface quality of workpieces is improved, and production cost is reduced. The drill for processing sheets is applicable to processing holes of sheets with thicknesses smaller than or equal to 2mm, such as steel plates, lead plates, stainless steel plates, copper plates, plastic plates and the like.
Description
Technical field
The utility model relates to a kind of drill bit of machine tool drill bit, particularly a kind of processing sheet.
Background technology
During with common Twist Drill, because the apex point height, main cutting edge is low on the thin plate of thickness≤2mm, when the apex point of common fluted drill has just bored saturating workpiece, drill bit loses the centering ability immediately, and axial force reduces suddenly, and workpiece is shaken, cutting edge is cut suddenly more, penetrate thin plate, cutting force is anxious to be increased, and the hole that gets out can cannot not occur roundly, become polygon, aperture overlap, burr are very big.Even cause the thin plate torsional deformation, and the hole is torn, and the hole surface roughness value is big.Drill bit is short service time, and drill bit is fractureed, and seriously influences product quality.
Summary of the invention
The purpose of this utility model provides a kind of drill bit of processing sheet, solve crudy that thin plate boring is difficult to guarantee product and cutter life low problem; Improve the thin plate working (machining) efficiency.
For solving the problems of the technologies described above, the purpose of this utility model is achieved in that a kind of drill bit of processing sheet, comprises drillstock and drill bit, and the cutting edge of drill bit is the circular arc sword, and cutting edge circular arc upper end is provided with blade tip;
The aspect ratio blade tip height of the unbearable point on the chisel edge.
The cutting portion sharp angle α of drill bit is 90 °～110 °.
The blade tip angle β of cutting edge is 30 °～40 °.
The chisel edge width of drill bit is 0.4mm～0.8mm.
The height b of blade tip is arrived than big 0.5 mm of lamella thickness～1.0mm in the point of contact, circular arc bottom of cutting edge.
Blade tip is 0.5mm～1.5mm to the height a of unbearable point.
The drill bit of a kind of processing sheet of the utility model is worn into the circular arc cutting edge with two main cutting edges of drill bit, and the cutting edge cylindrical is worn into two sharp blade tips.Unbearable point is cut workpiece earlier when boring like this, plays the centering effect; Utilize workpiece to be bent downwardly the chance of distortion then, make two outside blade tips incision workpiece.
When unbearable point did not drill workpiece as yet, two sharp main cutting edges had cut out annular groove on workpiece, and when penetrating workpiece, two main cutting edges have also played a kind of effect of locked-center except playing shear action place when unbearable.Therefore, too big variation just can not take place in cutting force, impacts can reduce greatly yet, and the hole that is cut out meets the requirements, the whole and any surface finish of hole circle.
Drill bit behind sharpening, its cutting ability is greatly improved, and has increased the durability of cutter greatly, and workpiece surface quality is improved, and has reduced production cost.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples:
Fig. 1 is the utility model structural representation.
Fig. 2 is the utility model drill bit structure figure.
The specific embodiment
A kind of drill bit of processing sheet comprises drillstock 1 and drill bit 2, and the cutting edge 3 of drill bit 2 is the circular arc sword, and cutting edge 3 circular arcs upper end is provided with blade tip 4;
Aspect ratio blade tip 4 height of unbearable sharp 5 on drill bit 2 chisel edges.
The chisel edge width of drill bit 2 is 0.4mm～0.8mm.
The height b of blade tip 4 is arrived than big 0.5 mm of lamella thickness～1.0mm in the point of contact, circular arc bottom of cutting edge 3.
The point of contact, circular arc bottom of cutting edge 3 is t+0.5～1.0mm to the circular arc degree of depth of the height b formation of blade tip 4, and wherein t is a lamella thickness.
The drill bit of a kind of processing sheet of the utility model is the special drill bit 2 that is formed by standard spiral bit sharpening.As shown in Figure 1.Comprise the guide part of drillstock 1, drill bit 2 and the cutting portion of drill bit 2.Drill bit 2 both sides blade tips 4 behind the sharpening, highly equal and symmetrical, unbearable sharp 5 than the outside two blade tips 4, and high 0.5mm～1.5mm grinds interior circular arc between the two; The circular arc degree of depth of cutting edge 3 is greater than lamella thickness 0.5mm～1mm, as shown in Figure 2.
During work, the apex point heart 5 is the incision workpiece earlier, two outside blade tips 4, and jacking is holed, and has alleviated the axial compressive force of 2 pairs of steel plates of drill bit.
The drill bit of a kind of processing sheet of the utility model is applicable to the hole processing of thin plates such as the steel plate, stereotype, corrosion resistant plate, copper coin, plastic plate of thickness≤2mm.
Claims (6)
1. the drill bit of a processing sheet comprises drillstock (1) and drill bit (2), it is characterized in that: the cutting edge (3) of drill bit (2) is the circular arc sword, and cutting edge (3) circular arc upper end is provided with blade tip (4);
Aspect ratio blade tip (4) height of the unbearable point (5) on drill bit (2) chisel edge.
2. the drill bit of a kind of processing sheet according to claim 1, it is characterized in that: the cutting portion sharp angle α of drill bit (2) is 90 °～110 °.
3. the drill bit of a kind of processing sheet according to claim 1, it is characterized in that: the blade tip angle β of cutting edge (3) is 30 °～40 °.
4. the drill bit of a kind of processing sheet according to claim 1 and 2, it is characterized in that: the chisel edge width of drill bit (2) is 0.4mm～0.8mm.
5. according to the drill bit of claim 1 or 3 described a kind of processing sheets, it is characterized in that: the height b of blade tip (4) is arrived than big 0.5 mm of lamella thickness～1.0mm in the point of contact, circular arc bottom of cutting edge (3).
6. the drill bit of a kind of processing sheet according to claim 1 is characterized in that: blade tip (4) is 0.5mm～1.5mm to the height a of unbearable point (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205865819U CN201862823U (en) | 2010-11-02 | 2010-11-02 | Drill for processing sheets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205865819U CN201862823U (en) | 2010-11-02 | 2010-11-02 | Drill for processing sheets |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201862823U true CN201862823U (en) | 2011-06-15 |
Family
ID=44133990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205865819U Expired - Fee Related CN201862823U (en) | 2010-11-02 | 2010-11-02 | Drill for processing sheets |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201862823U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104338977A (en) * | 2013-07-30 | 2015-02-11 | 上海名古屋精密工具股份有限公司 | Drill bit for machining holes in fiber composite materials |
| CN107717020A (en) * | 2017-10-31 | 2018-02-23 | 湖南科技大学 | Carbon fibre reinforced composite target drill with straight sword type blade |
| CN107717021A (en) * | 2017-10-31 | 2018-02-23 | 湖南科技大学 | Carbon fibre reinforced composite target drill with Circular Nose Cutting Edge blade |
| CN108465849A (en) * | 2018-05-31 | 2018-08-31 | 华伟纳精密工具（昆山）有限公司 | Deburring drill bit |
| CN110605425A (en) * | 2018-06-15 | 2019-12-24 | 上海惠而顺精密工具股份有限公司 | Hard alloy printed circuit board candle drill |
-
2010
- 2010-11-02 CN CN2010205865819U patent/CN201862823U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104338977A (en) * | 2013-07-30 | 2015-02-11 | 上海名古屋精密工具股份有限公司 | Drill bit for machining holes in fiber composite materials |
| CN107717020A (en) * | 2017-10-31 | 2018-02-23 | 湖南科技大学 | Carbon fibre reinforced composite target drill with straight sword type blade |
| CN107717021A (en) * | 2017-10-31 | 2018-02-23 | 湖南科技大学 | Carbon fibre reinforced composite target drill with Circular Nose Cutting Edge blade |
| CN108465849A (en) * | 2018-05-31 | 2018-08-31 | 华伟纳精密工具（昆山）有限公司 | Deburring drill bit |
| CN110605425A (en) * | 2018-06-15 | 2019-12-24 | 上海惠而顺精密工具股份有限公司 | Hard alloy printed circuit board candle drill |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110615 Termination date: 20131102 |