CN201534235U - Integral hard-alloy printed circuit board drill - Google Patents
Integral hard-alloy printed circuit board drill Download PDFInfo
- Publication number
- CN201534235U CN201534235U CN2009202076071U CN200920207607U CN201534235U CN 201534235 U CN201534235 U CN 201534235U CN 2009202076071 U CN2009202076071 U CN 2009202076071U CN 200920207607 U CN200920207607 U CN 200920207607U CN 201534235 U CN201534235 U CN 201534235U
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- main cutting
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- circuit board
- drill bit
- printed circuit
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Abstract
The utility model provides an integral hard-alloy printed circuit board drill, in particular to a drill for integral hard-alloy printed circuit boards with thickness of 1.6mm to 3.175mm. The circuit board drill comprises a blade part and a handle part. The blade part is formed by main cutting blades, spiral grooves, chip dividing grooves and transverse blade grinding grooves. A transverse blade is arranged at the middle part of the tip end of the blade part. The main cutting blades respectively extend from the two sides of the transverse blade. The cutting blades are arranged at the junctions of front blade faces and rear blade faces. The two spiral grooves are respectively arranged between the two main cutting blades and spirally extend towards the handle part. The chip dividing grooves are arranged on the front blade faces of the main cutting blades. The transverse blade grinding grooves are arranged at the junctions of the spiral grooves and the transverse blade. An angle between the two main cutting blades is 150 degrees. The spiral angle of the spiral grooves is 15 degrees. Through arranging the chip dividing grooves and transverse blade grinding grooves on the front blade faces of the main cutting blades, the utility model has the advantages that the chip removal conditions of the drill can be improved, the common problem of twisting in the drilling process is solved, and the service life and the working efficiency of the drill can be improved.
Description
Technical field
The utility model relates to a kind of Digit Control Machine Tool machining tool, relates in particular to the electroplax drill bit that is used for printed circuit board boring.
Background technology
Along with the high speed development of electronic information technology, the integrated level of electronic product is more and more higher, and wherein printed circuit is no exception.Along with the raising of printed circuit board integrated level, it is more meticulous that the making of printed circuit board also becomes thereupon.Therefore, the processing of circuit board drill, for example welding or boring, its requirement also becomes more strict.The drill bit of existing conventional design can not satisfy the quality requirement of these products.
Present drill bit is because the defective of cutting tip design exists positioning accuracy not good enough, thereby causes borehole accuracy not high.Common drill bit also exists the excessive problem of frictional force between drill bit and the board substrate when boring, this problem can cause the aperture irregular, and the hole hole wall that is bored is rough, is prone to the phenomenon of ' aperture dew base material '.The smear metal that produces during bit bore, if its chip removal poor-performing, smear metal can not in time be discharged, and along with the rising of borehole temperature, not only influences the performance of processed circuit board, also can produce smear metal and be accumulated in the helical flue of drill, causes ' twining silk ' problem.Common drill bit can not be processed multiple circuit board, when some special circuit plates of processing, after its cutting edge reconditioning once, the borehole accuracy variation, make to occur serious ' cloak ' problem when drill bit is holed again, can only use brand-new drill bit to hole when therefore holing again.Such consequence can directly cause the service life of drill bit and the reduction of operating efficiency, increases the circuit board making cost.
The utility model content
The problem that the utility model solves is that common circuit twist drill head boring positioning accuracy is poor, lacks and ineffective problem with big problem and the drilling life of bit of board substrate frictional force during boring.
In order to solve the problems of the technologies described above, the utility model provides a kind of whole hard alloy printed circuit board drill bit, and it is made up of blade and shank, and described blade is made of main cutting portion, helicla flute, chip dividing groove and chisel edge; This middle part, blade tip is a chisel edge, extends two main cutting portions along described chisel edge both sides, and wherein, main cutting portion comprises rake face, back knife face and main cutting edge.Rake face and back knife face intersect, and its intersection forms the main cutting edge of described circuit board drill.The blade of this circuit board drill has two helicla flutes, and described two helicla flutes lay respectively between two main cutting portions, and to the shank of circuit board drill in the shape of a spiral shape extend.Wherein, chip dividing groove is positioned on the rake face of main cutting portion.
Further, the junction of helicla flute and described chisel edge has the thinning groove that is used for web thinning.
Further, the formed angle of circuit board drill blade two main cutting edges is 150 °.
Further, the helical angle of described helical flue of drill is 15 °.
Further, the blade of described drill bit also comprises two lands and front cutting edge, and land is that start bit is extended to shank along the helicla flute edge with the outer of main cutting portion; Described front cutting edge is an incline of described land.
Further, the shank of described drill bit and blade are formed in one.
By above disclosed technical scheme as can be known, the utility model is by reducing the angle to 150 ° between two main cutting edges, i.e. the drift angle of circuit board drill, thus make drill bit in boring procedure, reduce its axially loaded, improve the boring positioning accuracy; Reduce drill bit helical angle to 15 °, can reduce the frictional force of drill bit to hole wall, make the boring rule, hole wall is smooth; The chip dividing groove that rake face is opened improves the condition of dividing bits and chip removal; Have the thinning groove, when reconditioning once more thereafter, chisel edge does not need to carry out reconditioning again, need not the drill bit blade that more renews yet, improves service life and its operating efficiency of drill bit.
Description of drawings
Fig. 1 is the front view of the utility model whole hard alloy printed circuit board drill bit;
Fig. 2 is the utility model whole hard alloy printed circuit board drill bit blade vertical view.
The specific embodiment
For technical characterictic of the present utility model is become apparent,, whole hard alloy printed circuit board drill bit of the present utility model is further described below in conjunction with accompanying drawing.
The utility model provides a kind of whole hard alloy printed circuit board drill bit, and is concrete, is a kind of 1.6mm-3.175mm whole hard alloy used for printed circuit board drill bit.As shown in Figure 1, this circuit board drill comprises blade 1 and shank 2.This blade 1 comprises two main cutting portions, two helicla flutes as shown in Figure 2.Blade 1 most advanced and sophisticated middle part is a chisel edge 108, extends 101a of main cutting portion and 101b respectively along chisel edge 108 both sides.Two 101a of main cutting portion are identical with the 101b structure.The 101a of main cutting portion comprises rake face 103a, back knife face 104a and main cutting edge 102a.Rake face 103a and back knife face 104a intersect, and its intersection forms main cutting edge 102a; Same, the 101b of another main cutting portion comprises rake face 103b, back knife face 104b and main cutting edge 102b.Rake face 103b and back knife face 104b intersect, and its intersection forms main cutting edge 102b.As shown in Figure 2, this circuit board drill blade has two helicla flute 105a and 105b.Helicla flute 105a and another helicla flute 105b are between 101a of main cutting portion and the 101b of another main cutting portion.As shown in Figure 1, helicla flute 105b and 105a are to drill handle part 2 shape extension in the shape of a spiral.As shown in Figure 2, have chip dividing groove 106a on the rake face 103a of the 101a of main cutting portion, same, have corresponding chip dividing groove 106b on the rake face 103b of the 101b of another main cutting portion.
As depicted in figs. 1 and 2, the junction of helicla flute 105a and another helicla flute 105b and chisel edge 108 has thinning groove 107a and another thinning groove 107b that is used for web thinning.Also comprise land 109a and 109b as Fig. 1 in conjunction with blade 1 shown in Figure 2.Land 109a is start bit shank 2 extensions to its drill bit along helicla flute 105b edge with main cutting portion 101a outer, and the first front cutting edge 110a of electroplax drill bit is the incline of land 109a.Symmetry, another land 109b with another main cutting portion 101b outer be start bit the shank 2 to this circuit board drill extends along helicla flute 105a edge, the incline of another land 109b be second front cutting edge of electroplax drill bit,
As shown in Figure 1.Included angle A between two main cutting edges is the circuit board drill drift angle, is 150 °.The circuit board drift angle is decreased to 150 ° by 165 ° of common drill bit, and the contact area between drill bit and the processed circuit board is reduced, and the vertical contact under the dynamic machining state is stressed and its axially loaded reduces, and has improved the positioning accuracy of drill bit.Can solve the problem of ordinary circuit board drill bit positioning accuracy difference like this.As shown in Figure 1, circuit board drill spiral fluted helical angle B, promptly the angle between helicla flute and the drill bit axial line is 15 °.The spiral fluted helical angle is reduced to 15 ° by 30 ° of ordinary circuit board drill bit and helps alleviating the frictional force that drill bit produces hole wall when rotating at a high speed, improve the fineness of hole wall, solve the problem of ordinary circuit board drill bit because of ' the aperture dew base material ' of the big existence of frictional force.
The rake face of two main cutting edges of circuit board drill as depicted in figs. 1 and 2 all has chip dividing groove, the smear metal stenosis strip that makes bit cutting come out is discharged, and improves the chip removal condition, to reduce smear metal heat, thereby the raising drilling efficiency solves a problem that twines of ordinary circuit board drill bit existence for many years.There is the thinning groove at the helicla flute middle part near chisel edge, the whole piece chisel edge that is beneficial to circuit board drill carries out reconditioning, in drill bit reconditioning process thereafter, needn't carry out special reconditioning to chisel edge again, therefore after can solving repeatedly the reconditioning blade, ' cloak ' problem of appearance easily of holing again.Therefore, the drill bit that the utility model provides does not need the more blade of bit change applicable to the multiple circuit board of processing when processing new hole at every turn, improves the service life and the operating efficiency of drill bit greatly.In addition, circuit board drill blade that the utility model provides and shank are the global formation body, are subjected to force intensity between blade that can improve greatly and the shank like this, mention the service life of circuit board drill.
In sum, the existing relatively ordinary circuit board drill bit of whole hard alloy printed circuit board drill bit that the utility model provides, open chip dividing groove by rake face at its main cutting edge, make the smear metal stenosis improve the chip removal condition and improve drilling efficiency, solve a problem that twines of ordinary circuit board drill bit existence for many years; By reducing the angle between the main cutting edge, the contact area between drill bit and the processed circuit board is reduced, improved the positioning accuracy of drill bit; By near chisel edge the thinning groove being arranged at the helicla flute middle part, the whole piece chisel edge that is beneficial to circuit board drill carries out reconditioning, in drill bit reconditioning process thereafter, needn't carry out special reconditioning to chisel edge again, therefore can solve repeatedly ' cloak ' problem of holing and occurring easily again behind the web thinning.
Though the utility model discloses as above with preferred embodiment, the utility model is not to be defined in this.Any those skilled in the art in not breaking away from spirit and scope of the present utility model, all can do various changes and modification, and therefore protection domain of the present utility model should be as the criterion with claim institute restricted portion.
Claims (6)
1. whole hard alloy printed circuit board drill bit, constitute by blade and shank, described blade is made of main cutting portion, helicla flute, chip dividing groove and chisel edge, it is characterized in that: middle part, described blade tip is chisel edge, extend described two main cutting portions along described chisel edge both sides, described main cutting portion comprises rake face, back knife face and main cutting edge; Described rake face and back knife face intersect, and its intersection forms described main cutting edge; Described blade has two helicla flutes, and described two helicla flutes lay respectively between two main cutting portions, and to the shape extension in the shape of a spiral of described shank; Described chip dividing groove is positioned on the rake face of described main cutting portion.
2. whole hard alloy printed circuit board drill bit as claimed in claim 1 is characterized in that: the junction of described helicla flute and described chisel edge has the thinning groove that is used for web thinning.
3. whole hard alloy printed circuit board drill bit as claimed in claim 1 is characterized in that: the angle between two main cutting edges of described blade is 150 °.
4. whole hard alloy printed circuit board drill bit as claimed in claim 1 is characterized in that: described spiral fluted helical angle is 15 °.
5. whole hard alloy printed circuit board drill bit as claimed in claim 1, it is characterized in that: the blade of described drill bit also comprises two lands and front cutting edge, described land is that start bit is extended to shank along the helicla flute edge with the outer of described main cutting portion; Described front cutting edge is an incline of described land.
6. whole hard alloy printed circuit board drill bit as claimed in claim 1 is characterized in that: the shank and the blade of described drill bit are one-body molded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202076071U CN201534235U (en) | 2009-08-07 | 2009-08-07 | Integral hard-alloy printed circuit board drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202076071U CN201534235U (en) | 2009-08-07 | 2009-08-07 | Integral hard-alloy printed circuit board drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201534235U true CN201534235U (en) | 2010-07-28 |
Family
ID=42534020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202076071U Expired - Lifetime CN201534235U (en) | 2009-08-07 | 2009-08-07 | Integral hard-alloy printed circuit board drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201534235U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102350520A (en) * | 2011-09-21 | 2012-02-15 | 广东工业大学 | Printed circuit board symmetrical drill with double chip dividing grooves |
| CN102357665A (en) * | 2011-10-08 | 2012-02-22 | 深圳市金洲精工科技股份有限公司 | Microbit and processing method thereof |
| CN102398061A (en) * | 2011-10-14 | 2012-04-04 | 深圳市金洲精工科技股份有限公司 | Micro drill and manufacturing method thereof |
| CN104416192A (en) * | 2013-09-02 | 2015-03-18 | 天工爱和特钢有限公司 | Rake face chip separation drill |
| CN108526554A (en) * | 2018-07-09 | 2018-09-14 | 江苏飞达钻头股份有限公司 | Preceding chip dividing groove bores |
| CN108526551A (en) * | 2018-05-03 | 2018-09-14 | 广东鼎泰高科精工科技有限公司 | A kind of drill bit used for printed circuit board |
| CN108673242A (en) * | 2018-05-29 | 2018-10-19 | 大连理工大学 | A kind of experimental method of the test micro- tooth milling cutter chip dividing groove cutting ability of multiple-cutting-edge |
| CN110681890A (en) * | 2019-10-17 | 2020-01-14 | 上海惠而顺精密工具股份有限公司 | Olecranon type nano diamond coating hard alloy drill bit |
| CN110695419A (en) * | 2019-10-22 | 2020-01-17 | 成都欧珀琅精密工具有限公司 | Ring reamer for removing iron |
-
2009
- 2009-08-07 CN CN2009202076071U patent/CN201534235U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102350520A (en) * | 2011-09-21 | 2012-02-15 | 广东工业大学 | Printed circuit board symmetrical drill with double chip dividing grooves |
| CN102357665A (en) * | 2011-10-08 | 2012-02-22 | 深圳市金洲精工科技股份有限公司 | Microbit and processing method thereof |
| CN102398061A (en) * | 2011-10-14 | 2012-04-04 | 深圳市金洲精工科技股份有限公司 | Micro drill and manufacturing method thereof |
| CN104416192A (en) * | 2013-09-02 | 2015-03-18 | 天工爱和特钢有限公司 | Rake face chip separation drill |
| CN108526551A (en) * | 2018-05-03 | 2018-09-14 | 广东鼎泰高科精工科技有限公司 | A kind of drill bit used for printed circuit board |
| CN108673242A (en) * | 2018-05-29 | 2018-10-19 | 大连理工大学 | A kind of experimental method of the test micro- tooth milling cutter chip dividing groove cutting ability of multiple-cutting-edge |
| CN108526554A (en) * | 2018-07-09 | 2018-09-14 | 江苏飞达钻头股份有限公司 | Preceding chip dividing groove bores |
| CN108526554B (en) * | 2018-07-09 | 2023-09-15 | 江苏飞达钻头股份有限公司 | Front chip dividing groove drill |
| CN110681890A (en) * | 2019-10-17 | 2020-01-14 | 上海惠而顺精密工具股份有限公司 | Olecranon type nano diamond coating hard alloy drill bit |
| WO2021073031A1 (en) * | 2019-10-17 | 2021-04-22 | 上海惠而顺精密工具股份有限公司 | Hawk-beak-type nano-diamond-coated hard alloy drill bit |
| CN110695419A (en) * | 2019-10-22 | 2020-01-17 | 成都欧珀琅精密工具有限公司 | Ring reamer for removing iron |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100728 |
|
| CX01 | Expiry of patent term |