CN203030988U - Step drill - Google Patents
Step drill Download PDFInfo
- Publication number
- CN203030988U CN203030988U CN 201320001513 CN201320001513U CN203030988U CN 203030988 U CN203030988 U CN 203030988U CN 201320001513 CN201320001513 CN 201320001513 CN 201320001513 U CN201320001513 U CN 201320001513U CN 203030988 U CN203030988 U CN 203030988U
- Authority
- CN
- China
- Prior art keywords
- drill
- bores
- drill body
- drillstock
- brill
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a step drill which comprises a drill shank and a drill body. The drill body is connected to one end of the drill shank, a drill tip is formed at one end of the drill body far away from the drill shank, a spiral drill cutting discharge groove is axially arranged, a cutting edge is formed at the junction of the drill cutting discharge groove and the outer side surface of the drill body, the drill body includes a first drill body and a second drill body, the drill tip is formed at one end of the first drill body, the other end of the first drill body is fixedly connected to one end of the second drill body, the other end of the second drill body is fixedly connected with one end of the drill shank, and the outer diameter of the first drill body is smaller than that of the second drill body. By the aid of the step drill, two portions are arranged on the drill body, the outer diameter of the drill tip is smaller than that of the other portion, a small hole can be firstly drilled by the front end of the drill body and is positioned, the rear end of the drill body is used for machining again, the problem of deflection of a hole position can be effectively solved, and the quality of products is improved.
Description
Technical field
The utility model relates to a kind of product processing with boring, and relates in particular to a kind of step and bores.
Background technology
At present, the Kong Weijun of product adopts the brill time processing to come out, and darker for the hole, die cast has the product of sand hole, and it is biased tiltedly to be easy to generate the hole, thereby influences product quality and quality.
Summary of the invention
In order to overcome above-mentioned defective, the utility model provides a kind of step to bore, and can effectively improve the biased oblique problem in hole.
The utility model for the technical scheme that solves its technical problem and adopt is: a kind of step bores, comprise drillstock and bore body, bore body and be connected in drillstock one end, this bores body away from the end formation apex point of described drillstock, it is axially arranged with helical form drilling cuttings discharge groove this brill body lateral surface upper edge, the intersection of discharging groove and described brill body lateral surface at described drilling cuttings is formed with cutting blade, described brill body comprises that first bores body and the second brill body, described first end that bores body is formed with apex point, and the other end is fixed on described second and bores body one end; Described second bores the body other end described drillstock one end that is connected; Described first bores the external diameter of body less than the external diameter of the described second brill body.
As further improvement of the utility model, the external diameter of the described second brill body is identical with described drillstock external diameter.
The beneficial effects of the utility model are: by at the brill body two parts being set, and the external diameter of apex point part can make the position of its front end subdrilling one aperture locating hole like this less than the external diameter of other parts, rear end reprocessing then, the biased oblique problem in hole be can effectively improve, product quality and quality promoted.
Description of drawings
Fig. 1 is the utility model structural representation.
By reference to the accompanying drawings, make the following instructions:
1---drillstock 2---bores body
20---apex point 21---first bores body
Drilling cuttings is discharged groove to 22---second bores body 23---
The specific embodiment
By reference to the accompanying drawings, the utility model is elaborated, but protection domain of the present utility model is not limited to following embodiment.
As shown in Figure 1, a kind of step bores, comprise drillstock 1 and bore body 2, bore body and be connected in drillstock one end, this bores body away from the end formation apex point 20 of drillstock, it is axially arranged with helical form drilling cuttings discharge groove 23 this brill body lateral surface upper edge, discharges groove at drilling cuttings and is formed with cutting blade with the intersection that bores the body lateral surface; Bore body and comprise that first bores body 21 and the second brill body 22, apex point 20 is formed at an end of the first brill body, and the first brill body other end is fixed on second and bores body one end; Second bores body other end drillstock one end that is connected; First bores the external diameter of body less than the external diameter of the second brill body, and the external diameter of the second brill body is identical with the drillstock external diameter.Like this, when boring, bore body with first earlier and get out an aperture, body then processing again second is bored then in the position of locating hole, can effectively improve the biased oblique problem in hole.
Claims (2)
1. a step bores, comprise drillstock (1) and bore body (2), bore body and be connected in drillstock one end, this bores body away from the end formation apex point (20) of described drillstock, it is axially arranged with helical form drilling cuttings discharge groove (23) this brill body lateral surface upper edge, the intersection of discharging groove and described brill body lateral surface at described drilling cuttings is formed with cutting blade, it is characterized in that: described brill body comprises that first bores body (21) and the second brill body (22), described first end that bores body is formed with apex point (20), and the other end is fixed on described second and bores body one end; Described second bores the body other end described drillstock one end that is connected; Described first bores the external diameter of body less than the external diameter of the described second brill body.
2. step according to claim 1 bores, and it is characterized in that: the external diameter of the described second brill body is identical with described drillstock external diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320001513 CN203030988U (en) | 2013-01-04 | 2013-01-04 | Step drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320001513 CN203030988U (en) | 2013-01-04 | 2013-01-04 | Step drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203030988U true CN203030988U (en) | 2013-07-03 |
Family
ID=48683129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320001513 Expired - Fee Related CN203030988U (en) | 2013-01-04 | 2013-01-04 | Step drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203030988U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103056424A (en) * | 2013-01-04 | 2013-04-24 | 昆山上达精密配件有限公司 | Step drill |
-
2013
- 2013-01-04 CN CN 201320001513 patent/CN203030988U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103056424A (en) * | 2013-01-04 | 2013-04-24 | 昆山上达精密配件有限公司 | Step drill |
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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: 20130703 Termination date: 20150104 |
|
| EXPY | Termination of patent right or utility model |