CN106141258A - Stepped core thickness fluted drill and manufacture method thereof - Google Patents
Stepped core thickness fluted drill and manufacture method thereof Download PDFInfo
- Publication number
- CN106141258A CN106141258A CN201610679198.XA CN201610679198A CN106141258A CN 106141258 A CN106141258 A CN 106141258A CN 201610679198 A CN201610679198 A CN 201610679198A CN 106141258 A CN106141258 A CN 106141258A
- Authority
- CN
- China
- Prior art keywords
- core thickness
- apex point
- core
- fluted drill
- thick
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/02—Twist drills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/24—Overall form of drilling tools
- B23B2251/241—Cross sections of the diameter of the drill
- B23B2251/242—Cross sections of the diameter of the drill increasing in a direction towards the shank from the tool tip
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/40—Flutes, i.e. chip conveying grooves
- B23B2251/408—Spiral grooves
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling Tools (AREA)
Abstract
The present invention relates to a kind of fluted drill structure, specifically a kind of stepped core thickness fluted drill and manufacture method thereof.This stepped core thickness fluted drill includes cylindric matrix and the double spiral groove having on matrix and cutting edge；The main core that apex point core thickness at one section of drill bit part near apex point is less than the main part after this section is thick, and these two sections of core thickness are step transition.The present invention, by arranging the apex point core thickness amount thick much smaller than main core, substantially reduces the chisel edge length of drill bit part, makes drill bit centering be more prone to, thus improves borehole accuracy；Corresponding step is set on plate by rolling at ditch, can directly form apex point core in the fluted drill operation of rolling thick, simplify the course of processing.
Description
Technical field
The present invention relates to a kind of fluted drill structure, specifically a kind of stepped core thickness fluted drill and manufacture method thereof.
Background technology
There are some defects being unfavorable for drilling function in common common standard fluted drill.Such as: chisel edge length is longer (to be bored
Point core thickness is the thickest), when causing boring, axial resistance is relatively big, and easily produces heat in metal cutting, centering shakiness during the just incision of boring simultaneously
Fixed, bore position precision is relatively low.
For improving fluted drill serviceability, maker generally uses emery wheel to bore finished product (or close to finished product)
Head, then carry out thinning.Repair chisel edge mill want feeding, position, clamp, grinding, indexing, secondary grinding, the process such as discharging, take a lot of work
Arduously, but also waste product can be produced.
Summary of the invention
It is stable that the technical problem to be solved is to provide a kind of centering that can improve in fluted drill working angles
Property, improve stepped core thickness fluted drill and the manufacture method thereof of borehole accuracy.
The stepped core thickness fluted drill of the present invention includes cylindric matrix and the double spiral groove having on matrix and cutting edge；?
The main core that apex point core thickness near one section of drill bit part of apex point is less than the main part after this section is thick, and these two sections of cores
Thickness is step transition.
The core thickness amount of described apex point core thickness end is the 30-40% of main core thickness initiating terminal core thickness amount.
Longitudinal length corresponding to described apex point core thickness is 2-3mm.
The manufacture method of the above-mentioned stepped core thickness fluted drill of the present invention is: roll the rotation of plate to heating by a pair fan-shaped ditch
Cylinder bar after softening carries out extrusion rolling, forms Double helix groove, and the latter end extruding periphery rolling plate at fan-shaped ditch sets
Put one section of radius apex point rolling section more than main body periphery, thick to form the less apex point core of core thickness amount.
The present invention is by arranging the apex point core thickness amount thick much smaller than main core, and the chisel edge substantially reducing drill bit part is long
Degree, makes drill bit centering be more prone to, thus improves borehole accuracy；By rolling at ditch, corresponding step, Ke Yi are set on plate
The fluted drill operation of rolling directly forms apex point core thick, simplify the course of processing.
Accompanying drawing explanation
Fig. 1 is the fluted drill structural representation of the embodiment of the present invention；
Fig. 2 be the embodiment of the present invention fluted drill axially on core thickness distribution schematic diagram；
Fig. 3 is the fluted drill drill bit part close-up schematic view with the core thickness of main part transition of the embodiment of the present invention.
Detailed description of the invention
As it can be seen, this stepped core thickness fluted drill includes cylindric matrix and the double spiral groove having on matrix and cutting
Sword；The main core that apex point core thickness at one section of drill bit part 1 near apex point is less than the main part 2 after this section is thick, and
These two sections of core thickness are step transition.The core thickness amount of apex point core thickness end is the 30-40% of main core thickness initiating terminal core thickness amount.Apex point
Longitudinal length corresponding to core thickness is 2-3mm.
The manufacture method of above-mentioned stepped core thickness fluted drill is: after rolling the rotating thermoplastic of plate by a pair fan-shaped ditch
Cylinder bar carries out extrusion rolling, forms Double helix groove, and the latter end extruding periphery rolling plate at fan-shaped ditch arranges one and half
Footpath is more than the apex point rolling section of main body periphery, thick to form the less apex point core of core thickness amount.
Claims (4)
1. a stepped core thickness fluted drill, the double spiral groove including cylindric matrix and having on matrix and cutting edge；Its feature
It is: the main core that the apex point core thickness at one section of drill bit part near apex point is less than the main part after this section is thick, and this
Two sections of core thickness are step transition.
Stepped core thickness fluted drill the most according to claim 1, is characterized in that: the core thickness amount of apex point core thickness end is main core
The 30-40% of thick initiating terminal core thickness amount.
Stepped core thickness fluted drill the most according to claim 1, is characterized in that: the longitudinal length corresponding to described apex point core thickness
For 2-3mm.
4. a manufacture method for one of claim 1-3 described stepped core thickness fluted drill, is characterized in that: fan-shaped by a pair
Ditch rolls the rotation of plate and the cylinder bar after thermoplastic carries out extrusion rolling, forms the Double helix groove of fluted drill, in sector
The latter end of the extruding periphery that ditch rolls plate arranges one section of radius apex point rolling section more than main body periphery, to form core thickness amount relatively
Little apex point core is thick.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610679198.XA CN106141258A (en) | 2016-08-17 | 2016-08-17 | Stepped core thickness fluted drill and manufacture method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610679198.XA CN106141258A (en) | 2016-08-17 | 2016-08-17 | Stepped core thickness fluted drill and manufacture method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106141258A true CN106141258A (en) | 2016-11-23 |
Family
ID=57330691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610679198.XA Pending CN106141258A (en) | 2016-08-17 | 2016-08-17 | Stepped core thickness fluted drill and manufacture method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106141258A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6652203B1 (en) * | 2002-08-30 | 2003-11-25 | Credo Technology Corporation | Precision drill bits |
| CN101590492A (en) * | 2008-05-30 | 2009-12-02 | 成都成量工具集团有限公司 | Straight shank twist drill φ 1.35-1.95 rolls ditch mill back of the body technological method for processing |
| CN101722323A (en) * | 2008-10-24 | 2010-06-09 | 佑能工具株式会社 | Drilling tool |
| CN102145400A (en) * | 2011-04-27 | 2011-08-10 | 江苏飞达钻头股份有限公司 | Twist drill with changeable helical angles |
| CN102303153A (en) * | 2011-08-31 | 2012-01-04 | 江苏万金工具有限公司 | Three-level increment twist drill |
| CN104174903A (en) * | 2013-05-21 | 2014-12-03 | 苏州锑玛精密机械有限公司 | Internal cooling deep hole drill |
-
2016
- 2016-08-17 CN CN201610679198.XA patent/CN106141258A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6652203B1 (en) * | 2002-08-30 | 2003-11-25 | Credo Technology Corporation | Precision drill bits |
| CN101590492A (en) * | 2008-05-30 | 2009-12-02 | 成都成量工具集团有限公司 | Straight shank twist drill φ 1.35-1.95 rolls ditch mill back of the body technological method for processing |
| CN101722323A (en) * | 2008-10-24 | 2010-06-09 | 佑能工具株式会社 | Drilling tool |
| CN102145400A (en) * | 2011-04-27 | 2011-08-10 | 江苏飞达钻头股份有限公司 | Twist drill with changeable helical angles |
| CN102303153A (en) * | 2011-08-31 | 2012-01-04 | 江苏万金工具有限公司 | Three-level increment twist drill |
| CN104174903A (en) * | 2013-05-21 | 2014-12-03 | 苏州锑玛精密机械有限公司 | Internal cooling deep hole drill |
Non-Patent Citations (1)
| Title |
|---|
| 吴忠保，许刚: "《轧制麻花钻加工工艺》", 《工具技术》 * |
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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: 20161123 |