CN202741802U - Miniature single-edge drill bit for processing printed circuit board - Google Patents
Miniature single-edge drill bit for processing printed circuit board Download PDFInfo
- Publication number
- CN202741802U CN202741802U CN 201220126883 CN201220126883U CN202741802U CN 202741802 U CN202741802 U CN 202741802U CN 201220126883 CN201220126883 CN 201220126883 CN 201220126883 U CN201220126883 U CN 201220126883U CN 202741802 U CN202741802 U CN 202741802U
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- chip area
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- long
- chip discharge
- towel
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Abstract
The utility model relates to a miniature single-edge drill bit for processing a printed circuit board, which is used for processing a PCB (Printed Circuit Board) printed substrate, which comprises a drill bit drill body; three spirally-ascending chip discharge grooves are formed on the drill bit drill body; the long chip discharge groove spirally extends to the tail end of the drill body from the position of a drill tip; the short chip discharge groove is formed on the front section of the drill body; due to different spiral angles, the short chip discharge groove and the long chip discharge groove are not parallel and are finally arranged in a intersecting manner; the towel back chip discharge groove is formed on a towel back after the long chip discharge groove is intersected with the short chip discharge groove; finally, both the short chip discharge groove and the towel back chip discharge groove are intersected with the long chip discharge groove in a separation state; the drill tip is arranged into a single main cutting edge; and the purpose of assisting the drill bit to stably cut and quickly discharge chips are achieved through different widths and different spiral angles of the chip discharge grooves, the drilling quality is improved, and the empty wall roughness is ensured. The miniature single-edge drill bit has the advantages that the rigidity is better, the hole site precision is higher, the empty wall roughness can satisfy the demands, and the needle breakage is not easy.
Description
Technical field
The utility model belongs to PCB microbit technical field, relates to a kind of miniature single cutting bit of the processing printed circuit board for PCB printed board processing.
Background technology
In known technology, the finished product of PCB microbit mainly is divided into two kinds at present, a kind of be conventional bit as shown in Figure 1-Figure 3, conventional bit forms by boring body Fig. 1 and apex point Fig. 2 respectively, it bores body as shown in Figure 1, being processed into twisted shape (helical form) by the cylinder Hardmetal materials forms, article two, the helical flute of symmetry forms, apex point 3a as shown in Figure 2, main cutting edge 1b by two symmetries, chisel edge between two main cutting edges and two helical front cutting edges that are positioned at the rear side of main cutting edge form, formed respectively the first operator face 2b and the second secondary knife face 3b as shown in the figure between described main cutting edge and front cutting edge and the chisel edge, be formed with center line 4b between the first operator face 2b and the second secondary knife face 3b, the length of center line is roughly consistent with the length of boring the body diameter, spiral front cutting edge extends to boring the Shenzhu face, form the spiralling chip area 1a of two symmetries, 2a, chip area 1a as shown in Figure 3, the degree of depth of 2a is increasing evenly distribution on the brill Shenzhu face, when carrying out grinding, front cutting edge contacts with the hole wall that grinding goes out, and forms the strong point.
Present development along with market, bit diameter has the trend that day by day reduces, diameter diminishes, the processing printed board under equal conditions is difficult to guarantee the rigidity of drill bit, rigidity can not guarantee, printed board will occur processing bores to departing from, can not the satisfying the market requirement, diameter mainly is the following drill bit of bradawl ￠ 0.50mm, there is at present company of the same trade to research and develop again and improves above problem, release the second single cutting bit, brill body Fig. 4 mainly is the helical flute structure by two former symmetries, become a long helical flute 2c and a short chip area 1c composition, the withdrawing section of apex point Fig. 5 consists of by being linked to be a plurality of withdrawing faces, two withdrawing faces intersect the first crest line 5c that forms and are positioned at drill bit foremost, the axle center O of the relative drill bit of this first crest line 5c is in the rotating center section of drill bit with meeting at right angles, the end of this first crest line 5c intersects the second crest line 7c that forms with two withdrawing faces and links to each other, and the outer end of this second crest line 7c links to each other with main cutting edge 1c section, the other end of the first crest line 5c is towards the opposition side that is connected side with the second crest line 7c, the apex point of this structure is not to be made of point, but formed by the first crest line with certain-length, therefore the intensity of blade tip increases, but establishment is damaged or damaged when being attached to the chisel edge section that easily produces when being cut on the material, can keep high machining hole position precision, and can prevent owing to the unstable broken drill that produces of the attaching that is cut material, and the processing printed board is bored to not departing from, so just can improve the indeterminable problem of conventional bit, and the basis at the equal processing conditions of conventional bit promotes working (machining) efficiency, but being hard up for money of this single cutting bit mainly is that the contact area of towel back of the body 6c and hole wall is too large, because penetration rate is too fast, shown in Figure 6, article one, long helical flute 8c and a short chip area 9c waste discharge bits space are too little, so that the speed of waste discharge bits is too slow, higher at ask for something, find in the use of the printed board that difficulty is higher that Hole Wall Roughness is very large, still can not satisfy user demand.3c is that the limit cutter is wide among the figure, and 4c is time chip discharging grooves, and O is the drill bit axle center.
Summary of the invention
The defective that exists in order to solve prior art, the utility model provide a kind of rigidity better, precision higher, empty wall roughness in position, hole can satisfy the demands, and be difficult for the miniature single cutting bit of the processing printed circuit board of broken needle.
The purpose of this utility model is achieved in that and comprises and handle bodily form all-in-one-piece bit drills body, it is characterized in that: have three spiralling chip areas with it in bit drills, wherein article one is long chip area, long chip area extends spirally the end that bores body from the position of apex point, second is short chip area, short chip area is arranged on and bores on the body leading portion, short chip area is not parallel with long chip area owing to spiral angle is different but final intersecting arranges, article three, be towel back of the body chip area, towel back after towel back of the body chip area is arranged on long chip area and short chip area and intersects, also boring on the body leading portion, final short chip area and towel back of the body chip area are crossed with long chip area by released state, and apex point is set to single main cutting edge; And the chip area different in width, different spiral angles, reaching auxiliary drill bit stablely carries out cutting operation, discharges the purpose of scrap fast, promotes the boring quality, guarantees empty wall roughness.
Described short chip area setting is positioned at bit drills body leading portion, is a short chip area of spending with long chip area symmetrical 180, and the angle of helical angle is identical with long chip area, and short chip area is crossed with long chip area by released state; The length of short chip area accounts for the 15%-25% of the length of long chip area, short chip area is dissolved into and is guaranteed drilling hole position precision in the long chip area, and the helical angle augmenting portion shoals groove depth gradually, so that the groove width of the long chip area of intersection and short chip area is wider, be beneficial to chip removal, shoal to remedy the rigidity loss that groove width is brought with the degree of depth, can apply in a flexible way.
The described towel back that is arranged on after long chip area and the second short chip area intersect, also at the leading portion that bores body, be arranged on the towel back after long chip area and the second short chip area intersect, also at the leading portion that bores body, towel back of the body chip area and short chip area are crossed with long chip area by released state, and two towel hem width degree equates, the length of towel back of the body chip area accounts for the 35%-55% of long chip removal flute length, guaranteeing has increased the chip removal space on the basis of the good rigidly of short chip area, practical sheet material of slightly being had relatively high expectations in the hole in boring, and because the time of boring is shorter, solid capacity itself is just smaller, thus towel back of the body chip area can remedy before good rigidly but empty wall roughness does not reach the defective of requirement.
Described apex point comprises a main cutting edge, an operator face, a secondary knife face, two towel limits, a limit cutter, operator face intersects formation the first crest line with secondary knife face, the axle center O of the relative drill bit of the first crest line is in the rotating center section of drill bit with meeting at right angles, and an end of the first crest line and two withdrawing faces intersect the second crest line that forms; Take axle center O as initial point, article two, towel limit and a limit cutter form a triangle point, in when boring location of holing exactly, and cooperate main cutting edge to cut, so that position, the hole precision that gets out is higher, rapidly scrap is discharged by long chip area, the second short chip area, the 3rd towel back of the body chip area, two towel limits are sharp to the borehole wall cutting, can guarantee good Hole Wall Roughness.
The finished product of the miniature single cutting bit of PCB of making according to above-mentioned technique and processing method, can realize because diameter diminishes, the drill bit rigidity can not guarantee, the processing printed board under equal conditions occurring bores to the phenomenon that departs from, and the life-span can promote on the former basis, all has relatively high expectations, the Hole Wall Roughness of the printed board that difficulty is higher can reach, and the processing conditions and the environment that do not need client end alteration, client does not need to buy other new equipment yet and uses this single cutting bit, in technique, equipment, thereby can not increase the cost that cost reduces processing in the staff training yet, enhance productivity.With the contrast of prior art single cutting bit, there has been approximately 3 times raising in the life-span of the utility model single cutting bit.Along with the increase of hole limit, to compare with the prior art single cutting bit, single cutting bit has had significantly improvement than the retentivity of hole position.
Description of drawings
Fig. 1 is the brill body structure schematic plan view of conventional bit;
Fig. 2 is conventional bit apex point structural representation plane;
Fig. 3 is that conventional bit bores the body cross sectional representation;
Fig. 4 is that the single cutting bit in the known technology bores the body structure schematic diagram;
Fig. 5 is the single cutting bit apex point structural representation in the known technology;
Fig. 6 is that the single cutting bit in the known technology bores the body cross sectional representation;
Fig. 7 is that the utility model single cutting bit bores the body structure schematic diagram;
Fig. 8 is the utility model single cutting bit the second short chip area and the 3rd towel back of the body chip area schematic diagram that crosses;
Fig. 9 is the utility model single cutting bit apex point cross sectional representation;
Figure 10 is along the profile in A-A cross section among Fig. 8;
Figure 11 is along the profile in B-B cross section among Fig. 8;
Figure 12 is along the profile in C-C cross section among Fig. 8;
Figure 13 is the utility model single cutting bit and prior art single cutting bit contrast lifetime change figure;
Figure 14 is that the utility model single cutting bit and prior art single cutting bit hole position CPK are with position, hole changing trend diagram.
The utility model single cutting bit accompanying drawing mark explanation: 1: towel back of the body chip area; 2: long chip area; 3: bore the body leading portion; 4: short chip area; A: helical angle; 5: operator face; 6: secondary knife face; 7: the second crest lines; 8: main cutting edge; 9: the limit cutter; 10: the first crest lines; 11: the towel limit; O: drill bit axle center.
Referring to Fig. 1-Fig. 3, this conventional bit forms by boring body Fig. 1 and apex point Fig. 2 respectively, it bores body as shown in Figure 1, being processed into twisted shape (helical form) by the cylinder Hardmetal materials forms, article two, the helical flute of symmetry forms, apex point 3a as shown in Figure 2, by the main cutting edge 1b of two symmetries, the chisel edge between two main cutting edges and two helical front cutting edges that are positioned at the rear side of main cutting edge form.Formed respectively the first operator face 2b and the second secondary knife face 3b as shown in the figure between described main cutting edge and front cutting edge and the chisel edge, be formed with center line 4b between the first operator face 2b and the second secondary knife face 3b, the length of center line is roughly consistent with the length of boring the body diameter, spiral front cutting edge extends to boring the Shenzhu face, form spiralling chip area 1a, the 2a of two symmetries, the degree of depth of chip area 1a, 2a is increasing evenly distribution on the brill Shenzhu face as shown in Figure 3, when carrying out grinding, front cutting edge contacts with the hole wall that grinding goes out, and forms the strong point.
Referring to Fig. 4-Fig. 6, the prior art single cutting bit, brill body Fig. 4 mainly is the helical flute structure by two former symmetries, become a long helical flute 2c and a short chip area 1c composition, the withdrawing section of apex point Fig. 5 consists of by being linked to be a plurality of withdrawing faces, two withdrawing faces intersect the first crest line 5c that forms and are positioned at drill bit foremost, the axle center O of the relative drill bit of this first crest line 5c is in the rotating center section of drill bit with meeting at right angles, the end of this first crest line 5c intersects the second crest line 7c that forms with two withdrawing faces and links to each other, and the outer end of this second crest line 7c links to each other with main cutting edge 1c section, the other end of the first crest line 5c is towards the opposition side that is connected side with the second crest line 7c, the apex point of this structure is not to be made of point, but formed by the first crest line with certain-length, therefore the intensity of blade tip increases, but establishment is damaged or damaged when being attached to the chisel edge section that easily produces when being cut on the material, can keep high machining hole position precision, and can prevent owing to the unstable broken drill that produces of the attaching that is cut material, and the processing printed board is bored to not departing from, so just can improve the indeterminable problem of conventional bit, and the basis at the equal processing conditions of conventional bit promotes working (machining) efficiency, but being hard up for money of this single cutting bit mainly is that the contact area of towel back of the body 6c and hole wall is too large, because penetration rate is too fast, shown in Figure 6, article one, long helical flute 8c and a short chip area 9c waste discharge bits space are too little, so that the speed of waste discharge bits is too slow, higher at ask for something, find in the use of the printed board that difficulty is higher that Hole Wall Roughness is very large, still can not satisfy user demand.3c is that the limit cutter is wide among the figure, and 4c is time chip discharging grooves, and O is the drill bit axle center.
Referring to Fig. 7-Figure 12, a kind of miniature single cutting bit of processing printed circuit board, comprise and handle bodily form all-in-one-piece bit drills body, have three spiralling chip areas with it in bit drills, wherein article one is long chip area 2, long chip area 2 extends spirally the end that bores body from the position of apex point, second is short chip area 4, short chip area 4 is arranged on and bores on the body leading portion 3, short chip area 4 is not parallel with long chip area 2 owing to spiral angle is different but final intersecting arranges, article three, be towel back of the body chip area 1, towel back after towel back of the body chip area 1 is arranged on long chip area 2 and short chip area 4 and intersects, also boring on the body leading portion 3, both are crossed final short chip area 4 and towel back of the body chip area 1 with long chip area 2 by released state, and apex point is set to single main cutting edge 8.
Described short chip area 4 arranges and is positioned at bit drills body leading portion, is a short chip area of spending with long chip area 2 symmetrical 180, and the angle of helical angle a is identical with long chip area, and short chip area is crossed with long chip area by released state; The length of short chip area 4 accounts for the 15%-25% of the length of long chip area 2, short chip area 4 is dissolved into and is guaranteed drilling hole position precision in the long chip area 2, and helical angle a augmenting portion shoals groove depth gradually, so that the groove width of the long chip area of intersection and short chip area 4 is wider, be beneficial to chip removal, shoal to remedy the rigidity loss that groove width is brought with the degree of depth.
Described towel back of the body chip area 1 and short chip area 4 both follow two towel hem width degree after long chip area crosses to equate by released state, the length of towel back of the body chip area 1 accounts for the 35%-55% of long chip removal flute length, and guaranteeing has increased the chip removal space on the basis of the good rigidly of short chip area 4.
Described apex point comprises a main cutting edge 8, an operator face 5, a secondary knife face 6, two towel limits 11, a limit cutter 9, operator face 5 intersects formation the first crest line 10 with secondary knife face 6, the axle center O of the first crest line 10 relative drill bits is in the rotating center section of drill bit with meeting at right angles, and an end of the first crest line 10 and two withdrawing faces intersect the second crest line 7 that forms; Take axle center O as initial point, article two, towel limit 11 and a limit cutter 9 form a triangle point, in when boring location of holing exactly, and cooperate main cutting edge to cut, so that position, the hole precision that gets out is higher, rapidly scrap is discharged by long chip area, the second short chip area, the 3rd towel back of the body chip area, two towel limits are sharp to the borehole wall cutting, can guarantee good Hole Wall Roughness.
The structure of this single cutting bit is seen the chip area structure-improved among Fig. 7-Figure 12, bore body and be provided with three spiralling chip areas, wherein long chip area extends spirally the end that bores body from the position of apex point, the second short chip area is arranged on the leading portion that bores body, short chip area is not parallel but final setting of intersecting with long chip area owing to spiral angle is different, towel back after the 3rd towel back of the body chip area is arranged on long chip area and the second short chip area and intersects, also at the leading portion that bores body, the short groove of final the second chip removal and towel back of the body chip area are crossed with long chip area by released state, apex point is set to single main cutting edge, and the chip area different in width, different spiral angles, reach the stable cutting operation that carries out of auxiliary drill bit, discharge fast the purpose of scrap, promote the boring quality, guarantee empty wall roughness.
Referring to Figure 13,14, can find out that this single cutting bit all satisfies customer requirement at diameter less than position, hole precision, life-span, the Hole Wall Roughness of the microbit of 0.50mm, and significant lifting is arranged.Following table is the utility model single cutting bit and prior art single cutting bit Hole Wall Roughness contrast test tables of data.
Claims (3)
1. the miniature single cutting bit of a processing printed circuit board, comprise and handle bodily form all-in-one-piece bit drills body, it is characterized in that: have three spiralling chip areas with it in bit drills, wherein article one is long chip area (2), long chip area (2) extends spirally the end that bores body from the position of apex point, second is short chip area (4), short chip area (4) is arranged on and bores on the body leading portion (3), short chip area (4) is not parallel with long chip area (2) owing to spiral angle is different but final intersecting arranges, article three, be towel back of the body chip area (1), towel back of the body chip area (1) is arranged on long chip area (2) and short chip area (4) the towel back after crossing, also boring on the body leading portion (3), both are crossed final short chip area (4) and towel back of the body chip area (1) with long chip area (2) by released state, and apex point is set to single main cutting edge (8).
2. the miniature single cutting bit of processing printed circuit board according to claim 1, it is characterized in that: described short chip area (4) setting is positioned at bit drills body leading portion, it is a short chip area of spending with long chip area (2) symmetrical 180, the angle of helical angle (a) is identical with long chip area, and short chip area is crossed with long chip area by released state; The length of short chip area (4) accounts for the 15%-25% of the length of long chip area (2), short chip area (4) is dissolved into and is guaranteed drilling hole position precision in the long chip area (2), and helical angle (a) augmenting portion shoals groove depth gradually, so that the groove width of the long chip area of intersection and short chip area (4) is wider, be beneficial to chip removal, shoal to remedy the rigidity loss that groove width is brought with the degree of depth.
3. the miniature single cutting bit of processing printed circuit board according to claim 1, it is characterized in that: described towel back of the body chip area (1) and short chip area (4) both follow two towel hem width degree after long chip area crosses to equate by released state, the length of towel back of the body chip area (1) accounts for the 35%-55% of long chip removal flute length, and guaranteeing has increased the chip removal space on the basis of the good rigidly of short chip area (4).
4, the miniature single cutting bit of processing printed circuit board according to claim 1, it is characterized in that: described apex point comprises a main cutting edge (8), an operator face (5), a secondary knife face (6), two towel limits (11), a limit cutter (9), operator face (5) intersects formation the first crest line (10) with secondary knife face (6), the axle center O of the relative drill bit of the first crest line (10) is in the rotating center section of drill bit with meeting at right angles, and an end of the first crest line (10) and two withdrawing faces intersect the second crest lines (7) that form; (O) is initial point take the axle center, article two, towel limit (11) and a limit cutter (9) form a triangle point, in when boring location of holing exactly, and cooperate main cutting edge to cut, so that position, the hole precision that gets out is higher, rapidly scrap is discharged by long chip area, the second short chip area, the 3rd towel back of the body chip area, two towel limits are sharp to the borehole wall cutting, can guarantee good Hole Wall Roughness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220126883 CN202741802U (en) | 2012-03-30 | 2012-03-30 | Miniature single-edge drill bit for processing printed circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220126883 CN202741802U (en) | 2012-03-30 | 2012-03-30 | Miniature single-edge drill bit for processing printed circuit board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202741802U true CN202741802U (en) | 2013-02-20 |
Family
ID=47701250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220126883 Expired - Lifetime CN202741802U (en) | 2012-03-30 | 2012-03-30 | Miniature single-edge drill bit for processing printed circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202741802U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103357925A (en) * | 2012-03-30 | 2013-10-23 | 新野鼎泰电子精工科技有限公司 | Micro single-blade drill for machining printed circuit board (PCB) |
-
2012
- 2012-03-30 CN CN 201220126883 patent/CN202741802U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103357925A (en) * | 2012-03-30 | 2013-10-23 | 新野鼎泰电子精工科技有限公司 | Micro single-blade drill for machining printed circuit board (PCB) |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 473500 west side of Tower Road, Xinye County, Henan, Nanyang Patentee after: Xinye Ding hi tech Seiko technology Co., Ltd. Address before: 473500 middle section of Tower Road, Xinye County, Henan, Nanyang Patentee before: Xinye Dingtai Electronic Fine Technology Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20171221 Address after: 473500 west side of Zhongxing Road, Xinye County, Nanyang City, Henan Patentee after: Nanyang Ding Hi Tech Co., Ltd. Address before: 473500 west side of Tower Road, Xinye County, Henan, Nanyang Patentee before: Xinye Ding hi tech Seiko technology Co., Ltd. |
|
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: Intersection of Zhongxing Road and Heyuan Road, Xinye County, Nanyang City, Henan Province Patentee after: NANYANG DINGTAI HIGH-TECH Co.,Ltd. Address before: 473500 West Side of Zhongxing Road, Xinye County, Nanyang City, Henan Province Patentee before: NANYANG DINGTAI HIGH-TECH Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130220 |