CN102274997A - Single cutting drill and processing method thereof - Google Patents
Single cutting drill and processing method thereof Download PDFInfo
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- CN102274997A CN102274997A CN2011101943748A CN201110194374A CN102274997A CN 102274997 A CN102274997 A CN 102274997A CN 2011101943748 A CN2011101943748 A CN 2011101943748A CN 201110194374 A CN201110194374 A CN 201110194374A CN 102274997 A CN102274997 A CN 102274997A
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- knife face
- apex point
- flank
- back knife
- hog nose
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Abstract
The invention relates to a single-cutting drill, which comprises a main cutting edge, and a main chip discharge chute which corresponds to the main cutting edge; the single-cutting drill is characterized in that a drill tip part of the single-cutting drill is provided with more than three flank surfaces of a cutting tool, and included angles between more than three flank surfaces of the cutting tool and a plane to be processed sequentially increase along the rotation direction from a first flank surface. According to the single-cutting drill provided by the invention, since the single-cutting drill is provided with more than three flank surfaces of the cutting tool, the rigidity and the strength of the single-cutting drill can be increased; and with the arrangement of the included angles between more than three flank surfaces of the cutting tool and the plane to be processed, the respective flank surfaces gradually decline along the rotation direction of the drill bit by beginning from the first flank surface, the interference of all the flank surfaces to the cutting edge is avoided, and the possibilities of abrasion and loss are reduced.
Description
Technical field
The present invention relates to the printed circuit board (PCB) manufacturing field of (being called for short PCB), in particular, relate to a kind of hog nose and processing method thereof.
Background technology
Along with the development of printed circuit board (pcb) technology and product, the carbide drill demand increases year by year, and the novel hard alloy drill bit constantly occurs, and is also more and more higher to the requirement of carbide drill.PCB is a kind of complex-shaped band spiral fluted capillary processing instrument with carbide drill (being called for short the little brill of PCB), is derived by traditional fluted drill.The little brill size of PCB is small, and its apex point structure will just can be observed by light microscope.Present most of PCB producer uses numerical control drilling machine to come the processing PCB plate, and digital control hole drilling is the important step of printed board processing procedure, and carbide drill then is the key factor of decision drilling quality and efficient.
The client is more and more higher to properties of product, the quality requirements of PCB drill bit, and conventional products can not be met customer need.As shown in Figure 1-Figure 3, PCB drill bit commonly used at present all is chip area 10, two symmetrical groups major first flank 12 and the second back knife face 13 that 11, two symmetrical spirals of cutting edge of two symmetries are arranged usually.Along with the brill of microbit directly require more and more littler, the bradawl easy breaking of rod on first watch, and conventional bit two helicla flute forms have weakened the drill bit rigidity, it is better to press for a kind of rigidity intensity, especially the better microbit of rigidity intensity under the condition of bradawl footpath.
Summary of the invention
Technical problem to be solved by this invention provides better hog nose of a kind of rigidity intensity and processing method thereof.
The objective of the invention is to be achieved through the following technical solutions:
A kind of hog nose, it comprises a main cutting edge, a main chip area corresponding with main cutting edge; It is characterized in that the apex point of described hog nose partly has the back knife face more than three, described more than three back knife face and the angle between the processing plane increase successively along direction of rotation from major first flank.
Described back knife face more than three meets at an apex point, and described apex point is boring the center, footpath.
Described major first flank is fan shape, and its part near apex point is narrower, away from the part broad of apex point.Chip area as far as possible near apex point, is made similar fan-shaped structure to major first flank, make the thickness of main cutting edge place correspondence enough thick, cutting edge stressed played good support effect.
Described hog nose is not provided with chisel edge, and described main chip area is crossed apex point.Make it very near unbearable the chisel edge shortening of hog nose, even do not establish chisel edge and make main chip area cross apex point, can reduce the axial force in the process, reduce axially wearing and tearing.
In the described back knife face more than three, described major first flank, the second back knife face and the 3rd back knife face meet at the position of departing from apex point.The second back knife face departs from apex point, can be so that the thickness of major first flank correspondence be thicker, make that the support force of main cutting edge is better, and because major first flank, the second back knife face and the 3rd back knife face meet at the position of departing from apex point, major first flank is to the direction skew of the second back knife face, make under the prerequisite that guarantees the major first flank adequate thickness, can further increase the degree of depth of main chip area, make the chip removal better effects if in the apex point part.
Described hog nose is provided with back-off, and described back-off and main chip area form two wall limits at the apex point position.Back-off and main chip area form two wall limits at the apex point position, can play the support effect when boring under apex point, and apex point is stressed more even, and the stressed support of apex point when turning over mill is also better.
Described back-off and main chip area form in two wall limits at the apex point position, are formed with front cutting edge with respect to another place of main cutting edge.Impaired when serious when the main cutting edge grinding, front cutting edge can play certain shear action.
Described hog nose is provided with back-off, and described back-off and main chip area only form a wall limit at the apex point position.
Described hog nose is provided with back-off, and described back-off is deepened along direction of rotation gradually at the thickness of apex point position.Interfere stressed when such design can avoid the back-off bottom to bore down.
Described main chip area intersects at the back knife face of apex point part with major first flank and two adjacency at least.The groove depth of main chip area can be darker, main chip area apex point part and major first flank and the back knife face of last at least two adjacency intersect its chip removal better effects if.
A kind of processing method of hog nose comprises:
On bar, grind the step of main chip area with the slot grinding emery wheel;
On bar, grind the step of the major first flank and the second back knife face with the sharpening emery wheel;
And after grinding the major first flank and the second back knife face, bar is rotated to an angle, grind the step of remaining back knife face successively with the sharpening emery wheel.
The present invention can improve the rigidity intensity of hog nose owing to the back knife face that is provided with for hog nose more than three; And, make that beginning each back knife face from major first flank reduces gradually along the drill bit direction of rotation by this back knife face more than three and the angle between the processing plane are set, and avoided of the interference of each back knife face to cutting edge, reduced the possibility of friction and loss.
Description of drawings
Fig. 1 is the apex point schematic diagram of prior art;
Fig. 2 is the drill bit profile of prior art;
Fig. 3 is the overall structure schematic diagram of prior art;
Fig. 4 is the structural representation of the apex point of an embodiment of the present invention;
Fig. 5 is the drill bit profile of an embodiment of the present invention;
Fig. 6 is the overall structure schematic diagram of an embodiment of the present invention;
Fig. 7 is the back knife face angle schematic diagram of an embodiment of the present invention;
Fig. 8 is the force analysis schematic diagram of an embodiment of the present invention apex point part;
Fig. 9 is the structural representation of the another kind of embodiment apex point of the present invention;
Figure 10 is the structural representation of another embodiment apex point of the present invention;
Figure 11 is the structural representation of another embodiment apex point of the present invention;
Figure 12 is the structural representation of another embodiment apex point of the present invention;
Figure 13 is the perspective view of the apex point of embodiment shown in Figure 12;
Figure 14 is the structural representation of another embodiment apex point of the present invention;
Figure 15 is the perspective view of the apex point of embodiment shown in Figure 14;
Figure 16 is the structural representation of another embodiment apex point of the present invention;
Figure 17 is the structural representation of another embodiment apex point of the present invention;
Figure 18 is the structural representation of another embodiment apex point of the present invention.
Wherein: 10, chip area; 11, main cutting edge; 12, major first flank; 13, the second back knife face;
20, chip area; 21, main cutting edge; 22, major first flank; 23, the second back knife face; 24, the 3rd back knife face; 25, the 4th back knife face; 26, the 5th back knife face; 27, the 6th back knife face; 28, the 7th back knife face; 30, chisel edge; 31, back-off; 32, wall limit; 33, front cutting edge; 4, processing plane.
The specific embodiment
Hog nose described in the embodiment of the invention mainly comprises a main cutting edge, a main chip area corresponding with main cutting edge, and the apex point of hog nose partly has the back knife face more than three, can improve the rigidity intensity of hog nose; Described more than three back knife face and the angle between the processing plane increase successively along direction of rotation from major first flank, make that beginning each back knife face from major first flank reduces gradually along the drill bit direction of rotation, avoided of the interference of each back knife face, reduced the possibility of friction and loss cutting edge.
The invention will be further described below in conjunction with accompanying drawing and preferred embodiment.
Embodiment one:
As shown in Fig. 4-8, described hog nose has only a main cutting 21,21, main chip area corresponding 20, a chisel edge 30 with main cutting edge 21, back knife face more than 3 is (as knife face after being five among the figure, be respectively: major first flank 22, the second back knife face 23, the 3rd back knife face 24, the 4th back knife face 25, the 5th back knife face 26), all back knife faces meet at an apex point.As shown in Figure 5, described hog nose has only one to run through the main chip area 20 that drill body part divides.As shown in Figure 7, described more than three back knife face and the angle between the processing plane 4 increase successively along direction of rotation from major first flank, the angle of the processing plane 4 of intersection in the drill bit side view between each face and mistake apex point, the first angle δ, 1＜the second angle δ, 2＜third angle degree δ, 3＜the 4th angle δ 4＜the 5th angle δ 5, make that beginning each back knife face from major first flank reduces gradually along the drill bit direction of rotation, have only main cutting edge 21 and chisel edge 30 to participate in cutting, can reduce contacting of each back knife face and processing plane like this, avoided of the interference of each back knife face, reduced the possibility of friction and loss cutting edge.Owing to have only a main chip area 20, so the core of microbit is thick can do thicklyer, can improve position, hole precision to a certain extent; Owing to lacked a chisel edge, it is compared with the conventional bit that has two chisel edges, and the microbit in the present embodiment can reduce axially loaded in drilling process, reduces breaking of rod rate; Main simultaneously chip area can be done than broad, and the situation of having avoided having smear metal to pile up between chip area and hole wall takes place, and has reduced the mutual scraping between smear metal and hole wall, can improve the hole wall surface roughness to a certain extent.
Described hog nose is provided with back-off 31, and described back-off 31 and main chip area 20 form one or two wall limit 32 at the apex point position.For the hog nose that forms two wall limits, its back-off and main chip area form two wall limits at the apex point position, the wall limit can be roughly symmetrical, make apex point corresponding wall limit that is provided with when boring down can play the support effect, apex point is stressed more even, and the stressed support of apex point when turning over mill is also better.Form in two wall limits 32 at the apex point position at back-off and main chip area, be formed with front cutting edge with respect to another place of main cutting edge, impaired when serious when the main cutting edge grinding, front cutting edge can play certain shear action, as shown in Figure 8.In addition, interfere in order better to avoid under back-off 31 bottoms boring stressedly, back-off 31 can also be deepened along direction of rotation gradually at the thickness of apex point position, also as shown in Figure 8.
As shown in Fig. 9, Figure 10, described main chip area 20 intersects at the back knife face (shown in the figure is the 5th back knife face 26, the 4th back knife face 25) of apex point part with major first flank and two adjacency at least, the groove depth of main chip area 20 can be darker, the back knife face that is deep to its apex point part and major first flank and last at least two adjacency intersects its chip removal better effects if.
Embodiment two:
As shown in Figure 11-13, with different among the embodiment one be, the major first flank 22 among the embodiment one is trapezoidal, and the major first flank 22 in the present embodiment is fan shape, and its part near apex point is narrower, away from the part broad of apex point.With main chip area 20 as far as possible near apex points, the weak point that its chisel edge 30 can be very, even can not establish chisel edge, main chip area is directly crossed apex point, and major first flank is made similar fan-shaped structure, and make the thickness of main cutting edge place correspondence enough thick, cutting edge stressed played good support effect.
Same, the hog nose in the present embodiment also can be provided with back-off 31, and described back-off 31 and main chip area 20 form (as shown in figure 11) or two (shown in Figure 12,13) wall limits 32 at the apex point position.
Embodiment three:
As shown in Figure 14-18, with different among the embodiment one be, described back knife face more than three no longer only meets at the apex point place of boring the center, footpath, it can meet at multiple spot: as shown in Figure 14,15, in the described back knife face more than three, described major first flank 22, the second back knife face 23 and the 3rd back knife face 24 meet at the position of departing from apex point.The second back knife face 22 departs from apex point, can be so that the thickness of major first flank correspondence be thicker, make that the support force of main cutting edge 21 is better, and because major first flank 22, the second back knife face 23 and the 3rd back knife face 24 meet at the position of departing from apex point, major first flank is to the direction skew of the second back knife face, make under the prerequisite that guarantees the major first flank adequate thickness, can further increase the degree of depth of main chip area, make the chip removal better effects if in the apex point part.
The number of back knife face can be according to concrete needs increase and decrease, in Figure 17, promptly be provided with seven after knife face (major first flank 22, the second back knife face 23, the 3rd back knife face 24, the 4th back knife face 25, the 5th back knife face 26, the 6th back knife face 27 and the 7th back knife face 28); Be not only major first flank, the second back knife face and the 3rd back knife face and meet at the position of departing from apex point, other back knife face also can cross mutually, as shown in Figure 18, described major first flank 22, the second back knife face 23 and the 3rd back knife face 24 meet at respectively a bit; Described the 4th back knife face 25, the 5th back knife face 26 and the 6th back knife face 27 meet at a bit respectively.
Accordingly, the processing method of the hog nose in the foregoing description then may further comprise the steps:
S1: on bar, grind main chip area with the slot grinding emery wheel;
S2: on bar, grind the major first flank and the second back knife face with the sharpening emery wheel;
S3: after grinding the major first flank and the second back knife face, bar is rotated to an angle, grind remaining back knife face with the sharpening emery wheel successively;
S4: as required, use mill floor sand wheel that drill bit is ground back-off.
Wherein, among the described step S2, use the sharpening emery wheel to grind the shape of conventional apex point simultaneously: promptly grind two major first flanks, two second back knife faces simultaneously, such design can utilization to a greater extent have operation now, and is comparatively easy.In the above-mentioned steps, no compulsory sequencing between step S1 and the step S2.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (11)
1. hog nose, it comprises a main cutting edge, a main chip area corresponding with main cutting edge; It is characterized in that the apex point of described hog nose partly has the back knife face more than three, described more than three back knife face and the angle between the processing plane increase successively along direction of rotation from major first flank.
2. a kind of hog nose as claimed in claim 1 is characterized in that, described back knife face more than three meets at an apex point, and described apex point is boring the center, footpath.
3. a kind of hog nose as claimed in claim 2 is characterized in that described major first flank is fan shape, and its part near apex point is narrower, away from the part broad of apex point.
4. a kind of hog nose as claimed in claim 3 is characterized in that described hog nose is not provided with chisel edge, and described main chip area is crossed apex point.
5. a kind of hog nose as claimed in claim 1 is characterized in that, in the described back knife face more than three, described major first flank, the second back knife face and the 3rd back knife face meet at the position of departing from apex point.
6. a kind of hog nose as claimed in claim 1 is characterized in that described hog nose is provided with back-off, and described back-off and main chip area form two wall limits at the apex point position.
7. a kind of hog nose as claimed in claim 6 is characterized in that, described back-off and main chip area form in two wall limits at the apex point position, is formed with front cutting edge with respect to another place of main cutting edge.Impaired when serious when the main cutting edge grinding, front cutting edge can play certain shear action.
8. a kind of hog nose as claimed in claim 1 is characterized in that described hog nose is provided with back-off, and described back-off and main chip area only form a wall limit at the apex point position.
9. a kind of hog nose as claimed in claim 1 is characterized in that described hog nose is provided with back-off, and described back-off is deepened along direction of rotation gradually at the thickness of apex point position.
10. a kind of hog nose as claimed in claim 1 is characterized in that, described main chip area intersects at the back knife face of apex point part with major first flank and two adjacency at least.
11. the processing method of a hog nose comprises:
On bar, grind the step of main chip area with the slot grinding emery wheel;
On bar, grind the step of the major first flank and the second back knife face with the sharpening emery wheel;
And after grinding the major first flank and the second back knife face, bar is rotated to an angle, grind the step of remaining back knife face successively with the sharpening emery wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110194374.8A CN102274997B (en) | 2011-07-12 | 2011-07-12 | A kind of hog nose and processing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110194374.8A CN102274997B (en) | 2011-07-12 | 2011-07-12 | A kind of hog nose and processing method thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN102274997A true CN102274997A (en) | 2011-12-14 |
| CN102274997B CN102274997B (en) | 2016-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110194374.8A Active CN102274997B (en) | 2011-07-12 | 2011-07-12 | A kind of hog nose and processing method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107262785A (en) * | 2017-06-14 | 2017-10-20 | 东莞艾瑞克精密工具有限公司 | A kind of apex point and the aperture knife tool with apex point |
| CN108995055A (en) * | 2018-09-06 | 2018-12-14 | 舟山飞达工具有限公司 | A kind of L slot cement brill |
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| JPH0733514U (en) * | 1993-11-26 | 1995-06-20 | 東芝タンガロイ株式会社 | 1-flute drill |
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| CN107262785A (en) * | 2017-06-14 | 2017-10-20 | 东莞艾瑞克精密工具有限公司 | A kind of apex point and the aperture knife tool with apex point |
| CN107262785B (en) * | 2017-06-14 | 2019-05-17 | 东莞艾瑞克精密工具有限公司 | A kind of apex point and the aperture knife tool with apex point |
| CN108995055A (en) * | 2018-09-06 | 2018-12-14 | 舟山飞达工具有限公司 | A kind of L slot cement brill |
Also Published As
| Publication number | Publication date |
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| CN102274997B (en) | 2016-04-27 |
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