CN102500796A - Microbit and processing method thereof - Google Patents
Microbit and processing method thereof Download PDFInfo
- Publication number
- CN102500796A CN102500796A CN2011104179642A CN201110417964A CN102500796A CN 102500796 A CN102500796 A CN 102500796A CN 2011104179642 A CN2011104179642 A CN 2011104179642A CN 201110417964 A CN201110417964 A CN 201110417964A CN 102500796 A CN102500796 A CN 102500796A
- Authority
- CN
- China
- Prior art keywords
- main cutting
- cutting edge
- microbit
- processing
- drill
- 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
Images
Landscapes
- Drilling Tools (AREA)
Abstract
The invention discloses a microbit and a processing method of the microbit, wherein the microbit comprises a drill body and a drill point; the drill point comprises a first main cutting edge, a second main cutting edge, a first chisel edge and a second chisel edge; the microbit further comprises a first spiral groove and a second spiral groove which respectively correspond to the first main cutting edge and the second main cutting edge and extend from the drill point to the drill body; the web thickness of the second main cutting edge away from the center of a drill core is greater than the web thickness of the first main cutting edge away from the center of the drill core; and the length of the first main cutting edge is greater than the length of that of the second main cutting edge. Compared with a common drill bit, the improved microbit has thickened thin part of the drill core, thus the web thickness of the drill core is enlarged, the rigidity strength is higher, and the purposes of enhancing the strain resistance of the microbit and realizing high hole site precision are realized. The processing method of the microbit can be carried out by adopting a common grinding wheel; and different bit shapes at two sides of the drill point are realized with minimum technological alternation; and therefore, the purpose of realizing high hole site processing precision is realized in an extremely simple way.
Description
Technical field
The present invention relates to the manufacturing field of microbit, in particular, relate to a kind of microbit and processing method thereof.
Background technology
As depicted in figs. 1 and 2, microbit commonly used at present comprises brill body and apex point, and there are the main cutting edge 1 of two symmetries and the back knife faces 3 of two groups of symmetries in its apex point place, bores the helicla flute 2 corresponding to main cutting edge 1 that then is provided with two symmetrical spirals on one's body.Along with the brill of microbit directly requires more and more littler; Its requirement to rigidity is also increasingly high, more be prone to the breaking of rod and bore the more little microbit in footpath, and conventional bit two helicla flutes is processed by same emery wheel; Brill core cross section thinnest part forms stress easily and concentrates; Shown in husky point among black region among Fig. 2 and Fig. 3, stress is concentrated the anti-performance that fractures that can directly influence drill bit, therefore presses for the better long-life drill bit of a kind of rigidity intensity.
Summary of the invention
Technical problem to be solved by this invention provides and a kind of very excellent position, hole precision and concentrated more long-life microbit of no obvious stress and processing method thereof can be provided.
Technical scheme of the present invention is: a kind of microbit; Comprise and bore body and apex point that said apex point comprises first main cutting edge, second main cutting edge, first chisel edge, second chisel edge, corresponding with first main cutting edge and second main cutting edge first helicla flute and second helicla flute that always extends to the brill body from apex point; Second main cutting edge is thick thick apart from boring the core central core greater than first main cutting edge apart from boring the core central core, and the length of first main cutting edge is greater than the length of second main cutting edge.
Preferably, said first main cutting edge and second main cutting edge are parallel to each other.
Preferably, said two main cutting edges have the major first flank and the second back knife face, and said first helicla flute and the second back knife face form arc ditch type, and second helicla flute and the second back knife face form near linear type ditch type.
Preferably, said two main cutting edges have the major first flank and the second back knife face, and said two major first flank length are different with width, and two second back knife face length are also different with width.
The beneficial effect of drill bit of the present invention is: microbit of the present invention is on the basis of normal miniature drill bit; It is thick constant apart from boring the core central core to keep first main cutting edge, and it is thick apart from boring the core central core to strengthen second main cutting edge then, and the brill core weakness of the relative conventional bit of drill bit after the improvement has been thickeied; Thereby it is thick to add wammel core core; Rigidity intensity is better, realizes strengthening the anti-adaptability to changes of drill bit, reaches the purpose of position, high hole precision; Microbit of the present invention cross section does not have obvious region of stress concentration, thereby can obtain the more long-life.
Technical scheme of the present invention also comprises: a kind of processing method of microbit; In the helicla flute step of processing drill bit; Process the second spiral fluted emery wheel and play ablation thickness partly less than processing the thickness that the first spiral fluted emery wheel plays the ablation part, the second spiral fluted grinding depth is less than the first spiral fluted grinding depth.
Preferably, processing the thickness that the first spiral fluted emery wheel plays ablation part is 1: 0.3～0.8 with the thickness ratio that the processing second spiral fluted emery wheel plays the ablation part.
Preferably, processing the thickness that the first spiral fluted emery wheel plays ablation part is 1: 0.5～0.6 with the thickness ratio that the processing second spiral fluted emery wheel plays the ablation part.
The processing method of drill bit of the present invention; Mainly be through dwindling the thickness that the processing second spiral fluted emery wheel plays the ablation part; Reduce the second spiral fluted degree of depth and realize second main cutting edge apart to bore the core central core thick greater than first main cutting edge apart from boring the thick purpose of core central core, two processing grinding wheels all can adopt conventional emery wheel, so just with the technology change amount of minimum; Realized that apex point both sides head dummy is different, realized the purpose of position, high hole machining accuracy very simply.
Description of drawings
Fig. 1 is the apex point structural representation of normal miniature drill bit in the prior art;
Fig. 2 is the profile that the drill body part of normal miniature drill bit in the prior art divides;
Fig. 3 is that the brill body stress of normal miniature drill bit in the prior art is concentrated the situation sketch map;
Fig. 4 is the apex point structural representation of microbit embodiment one of the present invention;
Fig. 5 is the profile that the drill body part of microbit embodiment one of the present invention divides;
Fig. 6 is that the brill body section stress of microbit embodiment one of the present invention is concentrated the situation sketch map;
Fig. 7 is that the brill body stress of microbit embodiment one of the present invention is concentrated the situation sketch map;
Fig. 8 is position, the hole machining accuracy comparison diagram of microbit embodiment one of the present invention and conventional bit;
Fig. 9 is the apex point structural representation of microbit embodiment two of the present invention.
Wherein: 1, main cutting edge; 2, helicla flute; 3, back knife face; 11, first main cutting edge; 12, second main cutting edge; 13, first chisel edge; 14, second chisel edge; 15, first helicla flute; 16, second helicla flute; 17, major first flank; 18, the second back knife face.
The specific embodiment
First embodiment as microbit of the present invention; Extremely shown in Figure 8 like Fig. 4; Comprise and bore body and apex point; Said apex point comprises first main cutting edge 11, second main cutting edge 12, first chisel edge 13 and second chisel edge 14, and said drill bit also comprises and corresponding with first main cutting edge 11 and second main cutting edge 12 extends to first helicla flute 15 and second helicla flute 16 that bores body from apex point always; Second main cutting edge, 12 distance brill core central core are thick thick greater than first main cutting edge, 11 distance brill core central core, and the length of first main cutting edge 11 is greater than the length of second main cutting edge 12.
The processing method of microbit according to the invention is: in the helicla flute step of processing drill bit; The emery wheel of processing second helicla flute 16 plays ablation thickness partly and plays ablation thickness partly less than the emery wheel of processing first helicla flute 15, and the grinding depth of second helicla flute 16 is less than the grinding depth of first helicla flute 15.The thickness that the emery wheel of processing first helicla flute 15 plays the ablation part is 1: 0.3～0.8 with the thickness that the emery wheel of processing second helicla flute 16 plays the ablation part than preferred value, and is more excellent in integration capabilities such as rigidity intensity, chip removal abilities by the drill bit that this numerical value processes; Ratio is less than normal, the less easy plug dirt of second helicla flute; Ratio is bigger than normal, the drill bit reduced stiffness, and position, hole precision is bad, is 1: 0.5～0.6 through reality test optimum ratio.
The processing method of microbit of the present invention; Mainly be the thickness that plays the ablation part through the emery wheel that dwindles processing second helicla flute 16; The degree of depth that reduces second helicla flute 16 realizes that second main cutting edge, 12 distance brill core central core are thick in the thick purpose of first main cutting edge, 11 distance brill core central core; Two processing grinding wheels all can adopt conventional emery wheel; So just, realized that apex point both sides head dummy is different, realized the purpose of position, high hole machining accuracy very simply with the technology change amount of minimum.For example; It is the drill bit of 0.30mm that processing is bored directly, and first helicla flute is processed with the conventional emery wheel of conventional processing A129UCSN0.3mm, and second helicla flute is then used the conventional emery wheel of processing brill footpath A129UCWQ0.3mm/0.15mm instead and processed; This sampling technology change amount is very little, very simple.
Microbit of the present invention keeps first main cutting edge, 11 distance brill core central core thick constant on the basis of conventional bit, and it is thick to strengthen second main cutting edge, 12 distance brill core central core then; The brill core weakness of the relative conventional bit of drill bit after the improvement has been thickeied, and is as shown in Figure 5, thereby it is thick to add wammel core core; Rigidity intensity is better, realizes strengthening the anti-adaptability to changes of drill bit, reaches the purpose of position, high hole precision; As shown in Figure 8; The left side is the Ave+3Std hole position machining accuracy of normal miniature drill bit when 2000 holes, and the right is the Ave+3Std hole position machining accuracy of microbit of the present invention when 2000 holes, according to the test data of reality; Drill bit bore of the present invention position precision can reach Ave+3Std≤40um, obviously is superior to the normal miniature drill bit; Stress concentration point generally is the thinnest part and the spiral groove end thinnest part in drill body cross section; And solve the concentrated method of stress mainly is the entity ratio that increases the cross section thinnest part; Like Fig. 6 and shown in Figure 7; Microbit of the present invention cross section does not have obvious region of stress concentration, thereby can obtain the more long-life.
In the present embodiment; The length of said first main cutting edge 11 is greater than the length of second main cutting edge 12; It is thin that the thickness that the emery wheel that forms reason one and be processing second main cutting edge 12 plays the ablation part plays ablation thickness partly than the emery wheel of first main cutting edge 11, and two is that second helicla flute, 16 groove depths reduce.When drill bit cuts, 11 main shear actions of first main cutting edge, second main cutting edge 12 plays the assisted machining effect, and the strain during the drill bit drilling reduces, and so also can improve position, the hole precision of processing.
In the present embodiment, keep first main cutting edge 11 and second main cutting edge 12 to be parallel to each other, such drill bit can not exist because position, the hole low precision problem that axial force bends drill bit to be caused in the course of the work.If because the groove depth of just simple adjustment second helicla flute 16 processing; Second main cutting edge 12 then can appear and first main cutting edge 11 has angle; Such drill bit is in process; Can produce axial force because second main cutting edge 12 tilts, and axial force can make that drill bit bends in the boring procedure, causes position, hole low precision to drill body.
In the present embodiment, 18, two major first flank 17 length of knife face were different with width after two main cutting edges had major first flank 17 and second, and two second back knife face 18 length are different with width.It is long that the cutting edge of first main cutting edge 11 is longer than the cutting edge of second main cutting edge 12; The major first flank length length and width degree of first main cutting edge 11 is narrow; Its major first flank chisel edge length reduces; Thereby the friction length of its major first flank chisel edge when reducing into brill reduces the drilling temperature, bears main shear action; The major first flank length of second main cutting edge 12 is short, width is wide, reduces the cutting edge length of this major first flank in right amount, increases this major first flank chisel edge length in right amount, goes into to bore intensity thereby improve, and reduces the apex point slippage when going into to bore.Two second back knife face length effects different with width are to adjust drill body helicla flute cross section ditch amplitude ratio, thereby reduce to cut torsional deflection, the heat dispersion in cross section rigidity good and side knock when increasing drill body and resisting drilling glass fabric and copper layer.
Second embodiment as microbit of the present invention; As shown in Figure 9; Said two main cutting edges 11,12 have the major first flank 17 and the second back knife face 18; Be that with embodiment one difference said first helicla flute 15 and the second back knife face 18 form arc ditch type, second helicla flute 16 and the second back knife face 18 form near linear type ditch type.Linear pattern ditch type helps chip removal and heat radiation, but can reduce the non-deformability in drill bit cross section, cause the breaking of rod easily, and arc ditch type can increase the non-deformability in drill bit cross section, but influences chip removal, heat radiation.The mode that adopts arc ditch type and linear pattern ditch type to combine, the comprehensive advantage of arc ditch type and linear pattern ditch type is improved the chip removal ability and the heat dispersion of drill bit.
Above content is to combine concrete preferred implementation to the further explain that the present invention did, and can not assert that practical implementation of the present invention is confined to these explanations.For the those of ordinary skill of technical field under the present invention, under the prerequisite that does not break away from the present invention's design, can also make some simple deduction or replace, all should be regarded as belonging to protection scope of the present invention.
Claims (7)
1. microbit; Comprise and bore body and apex point that said apex point comprises first main cutting edge, second main cutting edge, first chisel edge, second chisel edge, corresponding with first main cutting edge and second main cutting edge first helicla flute and second helicla flute that always extends to the brill body from apex point; It is characterized in that second main cutting edge is thick thick apart from boring the core central core greater than first main cutting edge apart from boring the core central core, the length of first main cutting edge is greater than the length of second main cutting edge.
2. microbit as claimed in claim 1 is characterized in that, said first main cutting edge and second main cutting edge are parallel to each other.
3. according to claim 1 or claim 2 microbit; It is characterized in that; Said two main cutting edges have the major first flank and the second back knife face, and said first helicla flute and the second back knife face form arc ditch type, and second helicla flute and the second back knife face form near linear type ditch type.
4. according to claim 1 or claim 2 microbit is characterized in that, said two main cutting edges have the major first flank and the second back knife face, and said two major first flank length are different with width, and two second afterwards the knife face length are also different with width.
5. like the processing method of each said microbit of claim 1 to 4; It is characterized in that; In the helicla flute step of processing drill bit; Process the second spiral fluted emery wheel and play ablation thickness partly less than processing the thickness that the first spiral fluted emery wheel plays the ablation part, the second spiral fluted grinding depth is less than the first spiral fluted grinding depth.
6. like the processing method of the said microbit of claim 5, it is characterized in that processing the thickness that the first spiral fluted emery wheel plays ablation part is 1: 0.3～0.8 with the thickness ratio that the processing second spiral fluted emery wheel plays the ablation part.
7. like the processing method of the said microbit of claim 6, it is characterized in that processing the thickness that the first spiral fluted emery wheel plays ablation part is 1: 0.5～0.6 with the thickness ratio that the processing second spiral fluted emery wheel plays the ablation part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104179642A CN102500796A (en) | 2011-12-14 | 2011-12-14 | Microbit and processing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104179642A CN102500796A (en) | 2011-12-14 | 2011-12-14 | Microbit and processing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102500796A true CN102500796A (en) | 2012-06-20 |
Family
ID=46212961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104179642A Pending CN102500796A (en) | 2011-12-14 | 2011-12-14 | Microbit and processing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102500796A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102794485A (en) * | 2012-08-24 | 2012-11-28 | 深圳市金洲精工科技股份有限公司 | Flat head drill and processing method thereof |
| CN110170686A (en) * | 2019-05-07 | 2019-08-27 | 深圳市金洲精工科技股份有限公司 | A kind of microbit |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007098569A (en) * | 2002-07-02 | 2007-04-19 | Mitsubishi Materials Corp | Drill |
| US20080138164A1 (en) * | 2008-02-18 | 2008-06-12 | Ching-Ching Chen | Drilling pin for machining metal substrates |
| KR20100043798A (en) * | 2008-10-21 | 2010-04-29 | 삼성전기주식회사 | Drill bit |
| JP2010162645A (en) * | 2009-01-15 | 2010-07-29 | Tungaloy Corp | Drill |
| CN201625801U (en) * | 2010-01-29 | 2010-11-10 | 深圳市金洲精工科技股份有限公司 | Micro-drill bit for circuit board drilling and special grinding wheel thereof |
| CN201735848U (en) * | 2010-07-20 | 2011-02-09 | 尖点科技股份有限公司 | Improved drilling needle structure |
| CN202388007U (en) * | 2011-12-14 | 2012-08-22 | 深圳市金洲精工科技股份有限公司 | Micro drill bit |
-
2011
- 2011-12-14 CN CN2011104179642A patent/CN102500796A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007098569A (en) * | 2002-07-02 | 2007-04-19 | Mitsubishi Materials Corp | Drill |
| US20080138164A1 (en) * | 2008-02-18 | 2008-06-12 | Ching-Ching Chen | Drilling pin for machining metal substrates |
| KR20100043798A (en) * | 2008-10-21 | 2010-04-29 | 삼성전기주식회사 | Drill bit |
| JP2010162645A (en) * | 2009-01-15 | 2010-07-29 | Tungaloy Corp | Drill |
| CN201625801U (en) * | 2010-01-29 | 2010-11-10 | 深圳市金洲精工科技股份有限公司 | Micro-drill bit for circuit board drilling and special grinding wheel thereof |
| CN201735848U (en) * | 2010-07-20 | 2011-02-09 | 尖点科技股份有限公司 | Improved drilling needle structure |
| CN202388007U (en) * | 2011-12-14 | 2012-08-22 | 深圳市金洲精工科技股份有限公司 | Micro drill bit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102794485A (en) * | 2012-08-24 | 2012-11-28 | 深圳市金洲精工科技股份有限公司 | Flat head drill and processing method thereof |
| CN102794485B (en) * | 2012-08-24 | 2014-08-27 | 深圳市金洲精工科技股份有限公司 | Flat head drill and processing method thereof |
| CN110170686A (en) * | 2019-05-07 | 2019-08-27 | 深圳市金洲精工科技股份有限公司 | A kind of microbit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102416494B (en) | Micro drill and processing method thereof | |
| JP5878086B2 (en) | Cutting tool manufacturing method | |
| CN105750599B (en) | A kind of compound tool of monoblock type processing step hole hole wall and bottom hole | |
| CN107052408A (en) | Boring bar tool | |
| CN106703704A (en) | Non-planar cutting tooth for improving rock breaking efficiency and diamond drill bit | |
| CN102357665A (en) | Microbit and processing method thereof | |
| CN102500796A (en) | Microbit and processing method thereof | |
| CN202388007U (en) | Micro drill bit | |
| CN202861471U (en) | Flat-head drill | |
| TW202417149A (en) | Micro drill bit | |
| CN103758463A (en) | Diamond-impregnated bit of arc tooth | |
| CN202336614U (en) | Mini drill head | |
| CN102794485B (en) | Flat head drill and processing method thereof | |
| CN204800014U (en) | Soft or hard combines board processing to use miniature drill bit | |
| CN202461614U (en) | Single-blade drill | |
| CN202804280U (en) | Ladder structure dill bit | |
| CN107755757A (en) | The integral type drilling and tapping cutter and its manufacture method of a kind of high manufacturing accuracy | |
| CN102274997B (en) | A kind of hog nose and processing method thereof | |
| CN202318477U (en) | Four-groove gang drill | |
| CN201684963U (en) | Self-centering twist drill | |
| CN108500352A (en) | A kind of drill mill | |
| CN105562788B (en) | For the drill bit of pcb board drilling | |
| CN104338976A (en) | Durable drill | |
| CN102294505B (en) | Mother-and-son edge microbit and processing method thereof | |
| CN103042256A (en) | Small diameter stepped drill |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120620 |