CN203495300U - Drill bit of gun drill - Google Patents
Drill bit of gun drill Download PDFInfo
- Publication number
- CN203495300U CN203495300U CN201320533208.0U CN201320533208U CN203495300U CN 203495300 U CN203495300 U CN 203495300U CN 201320533208 U CN201320533208 U CN 201320533208U CN 203495300 U CN203495300 U CN 203495300U
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- China
- Prior art keywords
- cutting edge
- main cutting
- drill
- drill bit
- gun
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- Expired - Lifetime
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Abstract
The utility model relates to a drill bit of a gun drill. The drill bit comprises main cutting edges, wherein the main cutting edges are divided into a first main cutting edge and a second main cutting edge; the main deflection angle of the second main cutting edge is greater than that of the first main cutting edge; the distance between the drill tip of the first main cutting edge and the outer circumference of the drill bit along the radial direction is equal to half of the diameter of the drill bit. According to the drill bit of the gun drill, the defect of formation of a boss caused by machining through the gun drill in the prior art is effectively overcome, so that the spot facing process is eliminated, and the machining cost is reduced; meanwhile, after the machining is completed by using the drill bit of the gun drill, position holes are provided for the subsequent process, so that the production efficiency is further improved.
Description
Technical field
A kind of drill bit of the utility model, is especially applied to the drill gun that dark stepped hole is processed.
Background technology
At present dark step blind hole processing need to be after drill gun completion of processing, because at least one wedge angle boss is formed on meeting bottom, before the next hole of processing, just need to increase a flat operation of ream like this, and then process a next hole with other drill bits, and so not only increased tool changing and process time, reduced production efficiency, increase by one simultaneously the flat cutter of ream has been increased to production cost, be unfavorable for batch production, then other strong drill bit structure load, manufacturing cost is higher.
Utility model content
The purpose of this utility model is to provide a kind of simple in structure, practical for the deficiency of above-mentioned background technology, has thoroughly eliminated the boss that traditional drill gun stays, and has left the gun drill in the hole, position of preparing for next procedure simultaneously after drilling.
The technical solution adopted in the utility model is: gun drill, comprise main cutting edge, and it is characterized in that: described main cutting edge is divided into the first main cutting edge and the second main cutting edge, and the tool cutting edge angle of the second main cutting edge is greater than the tool cutting edge angle of the first main cutting edge.
Preferably, the apex point of described the first main cutting edge is radially bit diameter to the distance of drill bit excircle 1/2nd.
Preferably, the apex point of described the second main cutting edge is radially bit diameter to the distance of drill bit excircle 1/4th to 1/5th.
Preferably, the tool cutting edge angle of described the first main cutting edge is 10 °.
Preferably, the tool cutting edge angle of described the second main cutting edge is 20 °.
The beneficial effects of the utility model are: the defect that has solved the boss producing after drill gun processing in prior art, thereby reduced the flat manufacturing procedure of ream, reduce processing cost, thereby after utilizing the utility model to process, also for next procedure provides hole, position, further improved production efficiency simultaneously.
Accompanying drawing explanation
Fig. 1 is that master of the present utility model looks schematic diagram
Fig. 2 is the left view of Fig. 1
The specific embodiment
As depicted in figs. 1 and 2, gun drill, comprises main cutting edge, and described main cutting edge is divided into the first main cutting edge 1 and the second main cutting edge 2, and the tool cutting edge angle α of the second main cutting edge 2
2be greater than the tool cutting edge angle α of the first main cutting edge 1
1.Increase a main cutting edge and be convenient to cutting; Be beneficial to and extend the drill gun life-span and improve machining accuracy.
Preferably, the apex point of the first main cutting edge 1 is radially 1/2nd of bit diameter D to the distance b of drill bit excircle, has so solved the defect that ream is flat that needs that existing drill gun is left over boss after drilling.
The apex point of the second main cutting edge 2 is radially 0 of bit diameter D～1/4 o'clock to the distance a of drill bit excircle, and the cutting stress of the second main cutting edge 2 is excessive, and machining accuracy is poor.
The apex point of the second main cutting edge 2 radially to the distance a of drill bit excircle be bit diameter D～1/2 o'clock, the cutting stress of the first main cutting edge 1 is excessive, easy to wear, the life-span is short.
When the apex point of described the second main cutting edge 2 is radially 1/4th to 1/5th of bit diameter D to the distance a of drill bit excircle, that is: during D/4≤a≤D/5, the above-mentioned shortcoming of balance preferably, the smear metal size that two main cutting edges produce is simultaneously conducive to the cooling of the discharge of smear metal and drill gun about equally.
Further preferred, the tool cutting edge angle α of described the first main cutting edge
1it is 10 °.
Further preferred, the tool cutting edge angle α of described the second main cutting edge
2it is 20 °.
In the utility model, a heavy relief angle of the first main cutting edge 1 and the second main cutting edge 2 is all preferably 15 °, and it is 20 ° that double relief angle is all preferably, and at the cutting edge of the first main cutting edge 1 and the second main cutting edge 2, is provided with naked sword band.Be placed in front cutting edge of the present utility model and can adopt prior art, at this, do not do tired stating.
Claims (5)
1. gun drill, comprises main cutting edge, it is characterized in that: described main cutting edge is divided into the first main cutting edge and the second main cutting edge, and the tool cutting edge angle of the second main cutting edge is greater than the tool cutting edge angle of the first main cutting edge.
2. gun drill according to claim 1, is characterized in that: the apex point of described the first main cutting edge is radially bit diameter to the distance of drill bit excircle 1/2nd.
3. gun drill according to claim 1, is characterized in that: the apex point of described the second main cutting edge is radially bit diameter to the distance of drill bit excircle 1/4th to 1/5th.
4. gun drill according to claim 1, is characterized in that: the tool cutting edge angle of described the first main cutting edge is 10 °.
5. according to the gun drill described in claim 1 or 4, it is characterized in that: the tool cutting edge angle of described the second main cutting edge is 20 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320533208.0U CN203495300U (en) | 2013-08-29 | 2013-08-29 | Drill bit of gun drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320533208.0U CN203495300U (en) | 2013-08-29 | 2013-08-29 | Drill bit of gun drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203495300U true CN203495300U (en) | 2014-03-26 |
Family
ID=50326307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320533208.0U Expired - Lifetime CN203495300U (en) | 2013-08-29 | 2013-08-29 | Drill bit of gun drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203495300U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022041109A1 (en) * | 2020-08-28 | 2022-03-03 | 罗伯特·博世有限公司 | Drill blade for drilling hard materials and drill bit |
| US11278970B2 (en) | 2018-10-09 | 2022-03-22 | Milwaukee Electric Tool Corporation | Drill bit |
| US11407039B2 (en) | 2018-01-29 | 2022-08-09 | Milwaukee Electric Tool Corporation | Drill bit |
-
2013
- 2013-08-29 CN CN201320533208.0U patent/CN203495300U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11407039B2 (en) | 2018-01-29 | 2022-08-09 | Milwaukee Electric Tool Corporation | Drill bit |
| US11278970B2 (en) | 2018-10-09 | 2022-03-22 | Milwaukee Electric Tool Corporation | Drill bit |
| WO2022041109A1 (en) * | 2020-08-28 | 2022-03-03 | 罗伯特·博世有限公司 | Drill blade for drilling hard materials and drill bit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140326 |
|
| CX01 | Expiry of patent term |