CN103056424A - Step drill - Google Patents
Step drill Download PDFInfo
- Publication number
- CN103056424A CN103056424A CN2013100024302A CN201310002430A CN103056424A CN 103056424 A CN103056424 A CN 103056424A CN 2013100024302 A CN2013100024302 A CN 2013100024302A CN 201310002430 A CN201310002430 A CN 201310002430A CN 103056424 A CN103056424 A CN 103056424A
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- China
- Prior art keywords
- drill
- bores
- drill body
- drillstock
- brill
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- 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.)
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Abstract
The invention discloses a step drill which comprises a drill handle and a drill body connected at one end of the drill handle. One end, far away from the drill handle, of the drill body forms a drill tip, a helical drilling discharging groove is arranged on an outer side face, along the axial direction of the drill body, of the drill body, a cutting blade is formed at the junction of the drilling discharging groove and the outer side face of the drill body, the drill body comprises 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 at one end of the second drill body, the other end of the second drill body is fixedly connected with one end of the drill handle, and the outer diameter of the first drill body is smaller than that of the second drill body. Two parts are arranged on the drill body, and the outer diameter of a drill tip part is smaller than that of the other part, so that a front end of the step drill can firstly drill a position of a small hole positioning hole, then a rear end of the step drill is processed, the problem of hole position deviation can be effectively solved, and product quality is improved.
Description
Technical field
The present invention relates to a kind of product processing with boring, relate in particular to a kind of step and bore.
Background technology
At present, the Kong Weijun of product adopt to bore time processing out, and darker for the hole, die cast has the product of sand hole, and it is biased tiltedly to produce easily the hole, thereby affects product quality and quality.
Summary of the invention
In order to overcome defects, the invention provides a kind of step and bore, can effectively improve the biased oblique problem in hole.
The present invention 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, be axially arranged with the helical form drilling cuttings along it on this brill body lateral surface and discharge groove, 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 described the second brill body.
As a further improvement on the present invention, the external diameter of described the second brill body is identical with described drillstock external diameter.
The invention has the beneficial effects as follows: 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, then rear end reprocessing, can effectively improve hole biased oblique problem, Improving The Quality of Products and quality.
Description of drawings
Fig. 1 is structural representation of the present invention.
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 present invention is elaborated, but protection scope of the present invention 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, be axially arranged with the helical form drilling cuttings along it on this brill body lateral surface and discharge groove 23, discharge groove at drilling cuttings and be 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 first and get out an aperture, more then processing of body second is bored in the position of locating hole then, 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, be axially arranged with the helical form drilling cuttings along it on this brill body lateral surface and discharge groove (23), 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 described the second brill body.
2. step according to claim 1 bores, and it is characterized in that: the external diameter of described the second brill body is identical with described drillstock external diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100024302A CN103056424A (en) | 2013-01-04 | 2013-01-04 | Step drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100024302A CN103056424A (en) | 2013-01-04 | 2013-01-04 | Step drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103056424A true CN103056424A (en) | 2013-04-24 |
Family
ID=48099473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100024302A Pending CN103056424A (en) | 2013-01-04 | 2013-01-04 | Step drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103056424A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2633482Y (en) * | 2003-06-27 | 2004-08-18 | 绵阳新晨动力机械有限公司 | Step counterboring cutter |
| CN101780555A (en) * | 2009-12-08 | 2010-07-21 | 苏州富莱克精密工具有限公司 | Step drill |
| CN102380644A (en) * | 2010-08-30 | 2012-03-21 | 濮春辉 | Twist drill |
| WO2012167448A1 (en) * | 2011-06-09 | 2012-12-13 | 上海钰工机电有限公司 | Stepped drill bit with composite blade back and constant amount of feed |
| CN203030988U (en) * | 2013-01-04 | 2013-07-03 | 昆山上达精密配件有限公司 | Step drill |
-
2013
- 2013-01-04 CN CN2013100024302A patent/CN103056424A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2633482Y (en) * | 2003-06-27 | 2004-08-18 | 绵阳新晨动力机械有限公司 | Step counterboring cutter |
| CN101780555A (en) * | 2009-12-08 | 2010-07-21 | 苏州富莱克精密工具有限公司 | Step drill |
| CN102380644A (en) * | 2010-08-30 | 2012-03-21 | 濮春辉 | Twist drill |
| WO2012167448A1 (en) * | 2011-06-09 | 2012-12-13 | 上海钰工机电有限公司 | Stepped drill bit with composite blade back and constant amount of feed |
| CN203030988U (en) * | 2013-01-04 | 2013-07-03 | 昆山上达精密配件有限公司 | Step drill |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130424 |