CN102615326A - Milling cutter for processing flexible board and forming process thereof - Google Patents
Milling cutter for processing flexible board and forming process thereof Download PDFInfo
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- CN102615326A CN102615326A CN2012100950791A CN201210095079A CN102615326A CN 102615326 A CN102615326 A CN 102615326A CN 2012100950791 A CN2012100950791 A CN 2012100950791A CN 201210095079 A CN201210095079 A CN 201210095079A CN 102615326 A CN102615326 A CN 102615326A
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- 238000003801 milling Methods 0.000 title claims abstract description 154
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000005520 cutting process Methods 0.000 claims abstract description 19
- 238000000227 grinding Methods 0.000 claims description 13
- 238000000465 moulding Methods 0.000 claims description 13
- 230000015572 biosynthetic process Effects 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 238000005498 polishing Methods 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 9
- 229910052782 aluminium Inorganic materials 0.000 abstract description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 5
- 239000010949 copper Substances 0.000 abstract description 3
- 229910052802 copper Inorganic materials 0.000 abstract description 3
- 239000004809 Teflon Substances 0.000 abstract description 2
- 229920006362 Teflon® Polymers 0.000 abstract description 2
- -1 polytetrafluoroethylene Polymers 0.000 abstract 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 abstract 1
- 239000004810 polytetrafluoroethylene Substances 0.000 abstract 1
- 239000004411 aluminium Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 235000003283 Pachira macrocarpa Nutrition 0.000 description 2
- 241001083492 Trapa Species 0.000 description 2
- 235000014364 Trapa natans Nutrition 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000011889 copper foil Substances 0.000 description 2
- 229910001651 emery Inorganic materials 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 235000009165 saligot Nutrition 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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Abstract
The invention discloses a milling cutter for processing a flexible board and a forming process thereof. The milling cutter comprises a cutter shank (1), wherein one end of the cutter shank (1) extends to form a milling cutter head (2), two spiral grooves (3) in the same encirclement direction are formed on the surface of the milling cutter head (2) for forming a milling blade, and a V-port cutting surface is arranged at the tail end of the milling cutter head (2); and the angles omega of the spiral angles of the spiral grooves (3) are 28-32 degrees. The invention simultaneously discloses a forming process of the milling cutter for processing the flexible board. The milling cutter can solve the problems of poor rigidity and poor cutting performance of the existing milling cutter for processing a flexible circuit board and is particularly suitable for processing aluminum base boards, copper base boards, the flexible boards, Teflon boards, polytetrafluoroethylene boards and other boards.
Description
Technical field
The invention belongs to milling cutter and manufacture and design the field, particularly a kind of milling cutter and moulding process thereof that is used for the processing flexibility plate.
Background technology
Traditional printed wiring board mainly is made up of Copper Foil, glass fibre, epoxy resin and relevant inserts etc., and the sheet material hard wear resistant adds man-hour; Use the processing of water chestnut tooth milling cutter; Wooden partition is smooth, and chip removal is smooth and easy, and this is owing to the chip breaking of water chestnut tooth milling cutter design reaches above-mentioned superperformance.But now; Printed wiring board is gradually by soft substrate plate material substitutions such as aluminium bases; This sheet material does not contain glass fibre, mainly is made up of Copper Foil, insulating materials, aluminium sheet, and machining sheet is softer; If PCB processes employed chip-breaker and the flat milling cutter of common 2 swords before also using; Add be difficult for to form chip breaking man-hour and be prone to form and long-pendingly cut knurl and make the cutting ecological deterioration cause normally chip removal rapidly, cause to be cut wooden partition " crude ", can't meet the requirements of dimensional accuracy and roughness attached to the cutting blade.
Be prone to problems such as the sticking bits of blade, chip removal are not smooth when the processing aluminum materials for solving slotting cutter, Chinese patent file CN20151979U discloses a kind of aluminium and uses the fine finishining slotting cutter, and it is taked that several cutters tooth and chip area are 45 ° of-50 ° of helical angles and is arranged on the cutter hub.Be easy to advantage thereby have chip removal, but this type cutter is primarily aimed at the aluminium in the technology processing, so sharpness through guaranteeing greater than the 40 above helical angles of degree and big parameters such as anterior angle to process.But for printed wiring board; Thickness of slab is generally in the 1.6mm; Self intensity can not be born excessive upwards component, and excessive helical angle can cause adding and produces the bigger component that makes progress vertically (being commonly called as uplift force) during owing to the cutter milling man-hour and cause excessive warpage in the wiring board process.
For solving the processing problems of flexible printed circuit board, Chinese patent CN 201931113 U disclose a kind of milling cutter that is used for flexible printed circuit board processing.This milling cutter comprises handle of a knife, and an end of said handle of a knife extends into the milling cutter head, is distributed with helical groove around the said milling cutter head; The helical angle of said helical groove is 15 °-32 °; All rake angles of said helical groove are 15 °-35 °, and helical angle and anterior angle design make that cutting is sharp; Cutting stress is little, reduces the flexible sheet distortion.But this milling cutter is the single-blade milling cutter, and rigidity is very poor, and it can only be suitable for to the flexible resin plate in the printed wiring board, and for aluminium base etc. high-intensity slightly sheet material is arranged comparatively speaking, adds man-hour easily because of rigidity deficiency breaking.
Summary of the invention
For this reason; Technical problem to be solved by this invention is the problem of the milling cutter poor rigidity cutting ability difference of existing processing flexibility wiring board, and then provides a kind of rigidity better, and working (machining) efficiency is high; Durability is strong, accurate to dimension and measured milling cutter of edges of boards matter and moulding process thereof.
For solving the problems of the technologies described above; The milling cutter that is used for the processing flexibility plate of the present invention; It comprises handle of a knife; One end of said handle of a knife extends into the milling cutter head, and the surface forming of said milling cutter head has two around the identical helicla flute formation milling edge of direction, and the end of said milling cutter head is provided with the cutting face of V mouth; The angle ω of said spiral fluted helical angle is 28-32 °.
In the above-mentioned milling cutter, the external diameter φ d of said milling cutter head is 0.4-3.175mm, and the core circular diameter φ K of said milling cutter head is 50% of said milling cutter head external diameter φ d.
In the above-mentioned milling cutter, said milling cutter forms the both-end tooth, and one of them end tooth relief angle α 1 is 13-17 °, and another end tooth relief angle α 2 is 29-31 °.
In the above-mentioned milling cutter, all rake angle γ of said milling cutter are 4-8 °, and the end tooth anterior angle γ 1 of said milling cutter is 4-8 °.
In the above-mentioned milling cutter, what end tooth one sword of said milling cutter was crossed the center is 3% of said milling cutter head external diameter φ d apart from e.
In the above-mentioned milling cutter, the end tooth of said milling cutter is the Closed grooved, and the land f length of its formation is 5% of said milling cutter head external diameter φ d.
In the above-mentioned milling cutter, said milling cutter is groove that is used to eliminate chisel edge of moulding on the short sword direction of end tooth.Reason thick owing to core at its end tooth center owing to milling cutter and the end tooth relief angle all has the generation of chisel edge; And chisel edge is big negative rake when milling; This is totally unfavorable for the milling condition that adds the milling cutter in man-hour; Thereby use a slice emery wheel to grind off the part formation groove of end tooth sword, and eliminate too much chisel edge part, improve milling condition.
The present invention discloses a kind of moulding process that is used for the milling cutter of processing flexibility plate simultaneously, may further comprise the steps,
A. grinding of milling handle: with the bar of selected material through corase grind-half correct grinding-correct grinding after, be machined to 3.175-0.001/-0.005mm, polish smooth;
B. confirm the length and the end-beveling of milling cutter head;
C. the mill of milling cutter head is cut: after the milling cutter head is milled to given size, under same clamping condition, carries out the thick essence of spiral fluted and be cut into type;
D. the polishing of end tooth angle and grooved: the cutting face that the milling cutter head is terminal processes end tooth angle and grooved under same clamping condition;
E. clean, check.
In the above-mentioned moulding process; Among the step a; Said corase grind is that the external diameter of said handle of a knife is polished to 3.20+0.01/0mm, and said half correct grinding is that the external diameter of said handle of a knife is polished to 3.180+0.005/0mm, and said correct grinding is that the external diameter of said handle of a knife is polished to 3.175-0.001/-0.005.
In the above-mentioned moulding process, the described end tooth angle of steps d comprises end tooth anterior angle, end tooth relief angle and all rake angles; Said grooved is the Closed grooved.
Technique scheme of the present invention is compared prior art and is had the following advantages:
(1) milling cutter of the present invention mainly is applicable to the processing of sheet materials such as aluminium base, copper base, flexible board, Teflon plate, polyfluortetraethylene plate, is particularly suitable for the processing for aluminium base, copper base; The surface forming of milling cutter head has two around the identical helicla flute formation milling edge of direction, compares the milling cutter of existing processing relative flexibility wiring board, and rigidity is better; Working (machining) efficiency is high; Durability is strong, and the helicla flute angle is between 28-32 °, and chip removal was in time smooth and easy when the assurance cutting was sharp.
(2) the core circular diameter of this milling cutter head is 50% of a milling cutter head external diameter, and it can increase the chip pocket volume effectively when guaranteeing cutter hub intensity, can guarantee that chip removal is in time smooth and easy, and the heat when reducing milling improves service life and milling quality.
(3) this milling cutter forms the both-end tooth, and one of them end tooth relief angle is 13-17 °, and another end tooth relief angle is 29-31 °, can obtain best bottom land roughness and less milling drag when angular dimensions makes the blind groove of milling blind hole behind the end tooth of above-mentioned optimization.
(4) to cross the distance at center be 3% of milling cutter head external diameter to end tooth one sword of this milling cutter.Axial force when this parameter designing can reduce to be milled into also obtains the bottom land plane of smooth when the blind groove of milling blind hole, use emery wheel along short sharpening one groove of end tooth simultaneously, eliminates chisel edge, reduces cutting resistance when making the end tooth milling.
(5) tooth leaves 5% the land f that length is milling cutter head external diameter this milling cutter week, and does the clear limit of relief grinding, when guaranteeing that milling is sharp, strengthens the intensity of cutting edge, prolongs cutter life.
When (6) processing this milling cutter; When doing the milling cutter head and cutting the grinder preface; 64 interlocking equipments of CNCNP5 type that use Switzerland Rollomatic company to produce are processed and one-shot forming; 65 interlocking equipments of CNC628 Smartgrinding of selecting for use Switzerland Rollomatic company to produce carry out the processing and the one-shot forming of grooved and end tooth, need cook the corase grind blade in the process route before having avoided and partly finish grind two work steps of blade and accomplish repeatedly the error that clamping brings, and have improved production efficiency simultaneously.
Description of drawings
For content of the present invention is more clearly understood, below according to a particular embodiment of the invention and combine accompanying drawing, the present invention is done further detailed explanation, wherein
Fig. 1 is the structural representation that is used for the milling cutter of processing flexibility plate of the present invention;
Fig. 2 is that the A-A of Fig. 1 is to cutaway view;
Fig. 3 is that the B of Fig. 1 is to view.
Reference numeral is expressed as among the figure: 1-handle of a knife, 2-milling cutter head, 3-helicla flute, 4-groove.
The specific embodiment
Below will combine accompanying drawing, and use following examples that the present invention is further set forth.
Embodiment 1
Shown in Figure 1 is the milling cutter that is used for the processing flexibility plate of the present invention; It comprises handle of a knife 1; One end of said handle of a knife 1 extends into milling cutter head 2; The surface forming of said milling cutter head 2 has two around the identical helicla flute 3 formation milling edges of direction, and the end of said milling cutter head 2 is provided with the cutting face of V mouth; The angle ω of the helical angle of said helicla flute 3 is 30 °.
The external diameter φ D of said handle of a knife 1 is 3.175mm, and the external diameter φ d of said milling cutter head 2 is 1.8 mm, and the core circular diameter φ K of said milling cutter head 2 is 50% of said milling cutter head 2 external diameter φ d, i.e. 0.9mm.
Fig. 2 can be found out by this view that for along dissecing the A-A that obtains perpendicular to the edge direction of said milling cutter head to view said milling cutter forms the both-end tooth, and one of them end tooth relief angle α 1 is 15 °, and another end tooth relief angle α 2 is 30 °.The end tooth anterior angle γ 1 of said milling cutter is 6 °.
Be illustrated in figure 3 as the end tooth of said milling cutter, wherein, what end tooth one sword of said milling cutter was crossed the center is 3%=0.054mm of said milling cutter head 2 external diameter φ d apart from e.All rake angle γ of said milling cutter are 6 °.
The end tooth of said milling cutter is the Closed grooved, and the land f length of its formation is 5% of said milling cutter head 2 external diameter φ d, i.e. 0.09mm.Closed grooved of the present invention; It is a proprietary trench structure of processing wiring board milling cutter; Its end tooth that refers to said milling cutter has one and exceeds the land on limit clearly, and the advantage of this grooved is that knife face is lower than cutting edge behind all teeth, thereby the drag that adds when knife face is to milling after man-hour can be little.Shortcoming is too high to crushing shape and graded width requirement for guaranteeing margin width.
One of the moulding on the short sword direction of end tooth of said milling cutter is used to eliminate the groove 4 of chisel edge.
The above-mentioned moulding process that is used for the milling cutter of processing flexibility plate, it may further comprise the steps:
A. grinding of milling handle: with the bar of selected material through corase grind-half correct grinding-correct grinding after, be machined to 3.175-0.001/-0.005mm, polish smooth.Wherein, said corase grind is that the external diameter of said handle of a knife is polished to 3.20+0.01/0mm, and said half correct grinding is that the external diameter of said handle of a knife is polished to 3.180+0.005/0mm, and said correct grinding is that the external diameter of said handle of a knife is polished to 3.175-0.001/-0.005.
B. confirm the length and the end-beveling of milling cutter head;
C. the mill of milling cutter head is cut: after the milling cutter head is milled to given size, under same clamping condition, carries out the thick essence of spiral fluted and be cut into type;
D. the polishing of end tooth angle and grooved: the cutting face that the milling cutter head is terminal processes end tooth angle and grooved under same clamping condition.Wherein, described end tooth angle comprises end tooth anterior angle, end tooth relief angle, all rake angles, and said grooved is the Closed grooved.
E. clean, check.
The ultra-fine granularity of K44UF (Ultra-fine) Hardmetal materials that said milling cutter selects for use German Kang Nade company to produce.Grain size is below 0.4 micron, and WC content is 88%, and Co content is 12%, and bending strength is 4500Nm, and hardness reaches HRA92.5 (HV30=1730), is guaranteeing that high cutting hardness simultaneously, has good bending strength again.
When the milling cutter head is cut the grinder preface; 64 interlocking equipments of CNCNP5 type that use Switzerland Rollomatic company to produce are processed and one-shot forming; 65 interlocking equipments of CNC628 Smartgrinding of selecting for use Switzerland Rollomatic company to produce carry out the processing and the one-shot forming of grooved and end tooth; Need cook the corase grind blade in the process route before having avoided and partly finish grind two work steps of blade and accomplish repeatedly the error that clamping brings, improve production efficiency simultaneously.
Embodiment 2
The milling cutter embodiment 1 that is used for the processing flexibility plate of present embodiment is basic identical, and its distinctive points is:
The angle ω of the helical angle of said helicla flute 3 is 32 °.Said milling cutter forms the both-end tooth, and one of them end tooth relief angle α 1 is 13 °, and another end tooth relief angle α 2 is 29 °.All rake angle γ of said milling cutter are 4 °.The end tooth anterior angle γ 1 of said milling cutter is 4 °.The external diameter φ D of said handle of a knife is 3.175mm, and the external diameter φ d of said milling cutter head 2 is 0.4mm.The core circular diameter φ K of said milling cutter head 2 is 0.20mm.What end tooth one sword of said milling cutter was crossed the center is 0.02mm apart from e.The end tooth of said milling cutter is the Closed grooved, and the land f width of its formation is 0.02mm.
Embodiment 3
The milling cutter embodiment 1 that is used for the processing flexibility plate of present embodiment is basic identical, and its distinctive points is:
The angle ω of the helical angle of said helicla flute 3 is 28 °.Said milling cutter forms the both-end tooth, and one of them end tooth relief angle α 1 is 17 °, and another end tooth relief angle α 2 is 31 °.All rake angle γ of said milling cutter are 8 °.The end tooth anterior angle γ 1 of said milling cutter is 8 °.The external diameter φ D of said handle of a knife is 3.175mm, and the external diameter φ d of said milling cutter head 2 is 3.175mm.The core circular diameter φ K of said milling cutter head 2 is 1.59mm.What end tooth one sword of said milling cutter was crossed the center is 0.09mm apart from e.The end tooth of said milling cutter is the Closed grooved, and the land f width of its formation is 0.16mm.
Obviously, the foregoing description only be for explanation clearly done for example, and be not qualification to embodiment.For the those of ordinary skill in affiliated field, on the basis of above-mentioned explanation, can also make other multi-form variation or change.Here need not also can't give exhaustive to all embodiments.And conspicuous variation of being extended out thus or change still are among the protection domain of the invention.
Claims (10)
1. milling cutter that is used for the processing flexibility plate; It is characterized in that: it comprises handle of a knife (1); One end of said handle of a knife (1) extends into milling cutter head (2); The surface forming of said milling cutter head (2) has two around the identical helicla flute of direction (3) formation milling edge, and the end of said milling cutter head (2) is provided with the cutting face of V mouth; The angle (ω) of the helical angle of said helicla flute (3) is 28-32 °.
2. the milling cutter that is used for the processing flexibility plate according to claim 1 is characterized in that:
The external diameter of said milling cutter head (2) (φ d) is 0.4-3.175mm, and its core circular diameter (φ K) is 50% of said milling cutter head (a 2) external diameter (φ d).
3. the milling cutter that is used for the processing flexibility plate according to claim 1 and 2 is characterized in that:
Said milling cutter forms the both-end tooth, and one of them end tooth relief angle (α 1) is 13-17 °, and another end tooth relief angle (α 2) is 29-31 °.
4. according to the arbitrary described milling cutter that is used for the processing flexibility plate of claim 1-3, it is characterized in that:
All rake angles (γ) of said milling cutter are 4-8 °, and the end tooth anterior angle of said milling cutter (γ 1) is 4-8 °.
5. according to the arbitrary described milling cutter that is used for the processing flexibility plate of claim 1-4, it is characterized in that: the distance (e) that end tooth one sword of said milling cutter is crossed the center is 3% of said milling cutter head (2) external diameter (φ d).
6. according to the arbitrary described milling cutter that is used for the processing flexibility plate of claim 1-5, it is characterized in that:
The end tooth of said milling cutter is the Closed grooved, and the land of its formation (f) length is 5% of said milling cutter head (2) external diameter (φ d).
7. according to the arbitrary described milling cutter that is used for the processing flexibility plate of claim 1-6, it is characterized in that:
One of the moulding on the short sword direction of end tooth of said milling cutter is used to eliminate the groove (4) of chisel edge.
8. moulding process that is used for the milling cutter of processing flexibility plate is characterized in that: may further comprise the steps,
A. grinding of milling handle: with the bar of selected material through corase grind-half correct grinding-correct grinding after, be machined to 3.175-0.001/-0.005mm, polish smooth;
B. confirm the length and the end-beveling of milling cutter head;
C. the mill of milling cutter head is cut: after the milling cutter head is milled to given size, under same clamping condition, carries out the thick essence of spiral fluted and be cut into type;
D. the polishing of end tooth angle and grooved: the cutting face that the milling cutter head is terminal processes end tooth angle and grooved under same clamping condition;
E. clean, check.
9. the moulding process that is used for the milling cutter of processing flexibility plate according to claim 8 is characterized in that:
Among the step a, said corase grind is that the external diameter of said handle of a knife is polished to 3.20+0.01/0mm, and said half correct grinding is that the external diameter of said handle of a knife is polished to 3.180+0.005/0mm, and said correct grinding is that the external diameter of said handle of a knife is polished to 3.175-0.001/-0.005.
10. it is characterized in that according to Claim 8 or the 9 described moulding process that are used for the milling cutter of processing flexibility plate:
The described end tooth angle of steps d comprises end tooth anterior angle, end tooth relief angle and all rake angles; Said grooved is the Closed grooved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210095079.1A CN102615326B (en) | 2012-03-31 | 2012-03-31 | Milling cutter for processing flexible board and forming process thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210095079.1A CN102615326B (en) | 2012-03-31 | 2012-03-31 | Milling cutter for processing flexible board and forming process thereof |
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| Publication Number | Publication Date |
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| CN102615326A true CN102615326A (en) | 2012-08-01 |
| CN102615326B CN102615326B (en) | 2014-11-12 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103084935A (en) * | 2012-12-19 | 2013-05-08 | 西南铝业（集团）有限责任公司 | Grinding method for milling cutter degrees, formed milling cutter and degree milling cutter |
| CN103567520A (en) * | 2012-08-09 | 2014-02-12 | 上海工程技术大学 | Blind groove diamond coating milling cutter |
| CN112238259A (en) * | 2019-07-18 | 2021-01-19 | 上海波肯实业有限公司 | Method for processing end face of plastic-dipped part |
| CN114273877A (en) * | 2021-12-24 | 2022-04-05 | 南阳鼎泰高科有限公司 | PCB micro-drill handle processing technique |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103567520A (en) * | 2012-08-09 | 2014-02-12 | 上海工程技术大学 | Blind groove diamond coating milling cutter |
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| CN112238259A (en) * | 2019-07-18 | 2021-01-19 | 上海波肯实业有限公司 | Method for processing end face of plastic-dipped part |
| CN114273877A (en) * | 2021-12-24 | 2022-04-05 | 南阳鼎泰高科有限公司 | PCB micro-drill handle processing technique |
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| CN102615326B (en) | 2014-11-12 |
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Effective date of registration: 20211118 Address after: 325612 Furong Town Industrial Zone, Yueqing City, Wenzhou City, Zhejiang Province Patentee after: ZHEJIANG DEWEI CEMENTED CARBIDE MANUFACTURING Co.,Ltd. Address before: 325600 No. 3, jingsan Road, Yueqing Central Industrial Park, Wenzhou, Zhejiang Patentee before: ZHEJIANG RICHVERTEX PRECISION TOOLS Co.,Ltd. |
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