CN203679361U - Minitype tool - Google Patents
Minitype tool Download PDFInfo
- Publication number
- CN203679361U CN203679361U CN201320893108.9U CN201320893108U CN203679361U CN 203679361 U CN203679361 U CN 203679361U CN 201320893108 U CN201320893108 U CN 201320893108U CN 203679361 U CN203679361 U CN 203679361U
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- Prior art keywords
- chip area
- cutter
- mill back
- tail
- chip groove
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Abstract
The utility model discloses a minitype tool. The minitype tool comprises a first chip groove, a second chip groove and a grinding back, wherein the first chip groove spirally extends to a drill tail from a drill point, the second chip groove spirally extends towards the drill tail from the drill point, the second chip groove is shorter than the first chip groove, and the grinding back is arranged on the tail portion of the second chip groove and connected with the tail portion of the second chip groove and extends continuously towards the drill tail. According to the minitype tool, due to the fact that the first chip groove spirally extends to the drill tail from the drill point, the second chip groove is shorter than the first chip groove, and the grinding back is connected with the second chip groove, the grinding depths of the chip grooves can be changed through the grinding back, so that blade backs of the two chip grooves are removed; on the premise that the rigidity is enough, frictional heating between the blade backs and a hole wall can be reduced, and a drill bit is prevented from being deformed.
Description
Technical field
The utility model relates to the printed circuit board (PCB) manufacture field of (being called for short PCB), in particular, relates to a kind of min-cutter.
Background technology
Along with the development of printed circuit board (pcb) technology and product, carbide drill demand increases year by year, and novel hard alloy drill bit constantly occurs, also more and more higher to the requirement of carbide drill.Carbide drill for PCB (being called for short the micro-brill of PCB) is a kind of complex-shaped band spiral fluted capillary processing instrument, derivative by traditional fluted drill.The micro-brill size of PCB is small, and its apex point structure will just can be observed by light microscope.Current most of PCB producer carrys out processing PCB plate with numerical control drilling machine, and digital control hole drilling is the important step of printed board processing procedure, and carbide drill is the key factor that determines drilling quality and efficiency.
Properties of product, the quality requirements of client to PCB drill bit is more and more higher, and conventional products can not be met customer need.As shown in Figure 1-Figure 3, at present conventional PCB drill bit is all the chip area 10 that has two symmetrical 11, two symmetric helixes of cutting edge, symmetrical two groups of major first flanks 12 and the second rear knife face 13 conventionally.Along with the brill footpath requirement of microbit is more and more less, the bradawl easy breaking of rod on first watch, and conventional bit two helicla flute forms have weakened drill bit rigidity.For addressing this problem, Chinese patent application: CN102310215B proposes a kind of by two symmetrical chip areas 10 are crossed and solve the problem of drill bit rigidity to coming together, but after this kind of structure chip area crosses, can cause the fabric width (spacing distance between chip area) of brill body larger, in drilling process, can there is too much friction with hole wall, cause heat to increase, serious cause drill bit distortion or endanger the smoothness of hole wall.Same, Chinese patent application: CN101767217B also proposes a kind of single cutting bit, and this kind of hog nose also proposed the project organization of length chip area, and in drilling process, equally also there is above-mentioned problem in the drill bit of this kind of structure.
Utility model content
Technical problem to be solved in the utility model is to provide the better a kind of min-cutter of a kind of rigidity intensity.
The purpose of this utility model is achieved through the following technical solutions: a kind of min-cutter, comprising:
The first chip area, this first chip area is spirally extended to brill tail by apex point;
The second chip area, this second chip area is extended spirally to boring tail direction by apex point, and the length of this second chip area is less than the length of described the first chip area;
The mill back of the body, the afterbody that the described mill back of the body is arranged at described the second chip area joins with it, and continues to extend to boring tail direction.
Preferably, the spiral angle of the described mill back of the body is identical with described the second chip area.Setting reduces to be grinding into the degree of depth gradually like this, removes land, reduces the friction of land and hole wall.
Preferably, the described mill back of the body extends to brill tail.This is a kind of concrete structure that the mill back of the body is set.
Preferably, the degree of depth that is grinding into of the described mill back of the body is being reduced to the direction of boring tail gradually by apex point.Arrange like this mill back of the body reduce the mill back of the body friction.
Preferably, the helical angle of described the second chip area is different from the helical angle of described the first chip area.The helical angle of the first chip area and the second chip area is not both another concrete mode that the first chip area and the second chip area are set.
Preferably, the helical angle of the described mill back of the body is different from the helical angle of described the second chip area.This is the another kind of concrete structure that the mill back of the body and the second chip area are set.
Preferably, the described mill back of the body ends in the intersection location of itself and the first chip area.In general, the friction of boring body fore-end and hole wall is larger, this setup, and one can reduce friction, and two can avoid boring the intensity of end is after one's death affected, because general cutter breaking all occurs in rear end part.
Preferably, described mill knapsack is drawn together two first parallel mill back ofs the body and the second mill back of the body, and the described first mill back of the body is identical with the helical angle of the described second mill back of the body.Article two, parallel mill is carried on the back the friction that can further reduce to bore body and hole wall, meanwhile, two parallel modes is set and can avoids boring body structure and be subject to excessive impact.
Preferably, described min-cutter is single-blade type drill bit.This is a kind of particular type of min-cutter.
Preferably, described min-cutter is twolip type microbit, and two main cutting edges of this twolip type microbit are symmetrical arranged, and described the first chip area and described the second chip area are also symmetrical arranged.This is the another kind of particular type of min-cutter.
The utility model due to the first chip area by apex point spiral to boring tail, the length of the second chip area is less than the first chip area, the mill back of the body is connected with the second chip area, thereby carries on the back the land that can change chip area and be grinding into two chip areas of degree of depth removal by mill; Guaranteeing, under the prerequisite of enough rigidity, can further to reduce land and hole wall frictional heating, prevent drill bit distortion.
Accompanying drawing explanation
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 brill body structure schematic diagram of the utility model embodiment mono-;
Fig. 5 is the apex point structural representation of the utility model embodiment mono-;
Fig. 6 is the brill body structure schematic diagram of the utility model embodiment bis-;
Fig. 7 is the apex point structural representation of the utility model embodiment tri-;
Fig. 8 is the brill body structure schematic diagram of the utility model embodiment tri-;
Fig. 9 is the brill body structure schematic diagram of the utility model embodiment tetra-;
Figure 10 is the brill body structure schematic diagram of the utility model embodiment five.
Wherein Fig. 1-3:10, chip area; 11, cutting edge; 12, major first flank; 13, the second rear knife face; Fig. 4-10:110, the first chip area; 111, main cutting edge; 120, the second chip area; 121, main cutting edge; 127, the mill back of the body; 127a, the first mill back of the body; 127b, the second mill back of the body; 129, termination locations.
The specific embodiment
The utility model discloses a kind of min-cutter, comprising: the first chip area, and this first chip area is spirally extended to brill tail by apex point; The second chip area, this second chip area is extended spirally to boring tail direction by apex point, and the length of this second chip area is less than the length of described the first chip area; The mill back of the body, the afterbody that the described mill back of the body is arranged at described the second chip area joins with it, and continues to extend to boring tail direction.The utility model due to the first chip area by apex point spiral to boring tail, the length of the second chip area is less than the first chip area, the mill back of the body is connected with the second chip area, thereby carries on the back the land that can change chip area and be grinding into two chip areas of degree of depth removal by mill; Guaranteeing, under the prerequisite of enough rigidity, can further to reduce land and hole wall frictional heating, prevent drill bit distortion.
Below in conjunction with accompanying drawing and preferred embodiment, the utility model is described in further detail.
Embodiment mono-:
If Fig. 4 is to Figure 5 shows that a specific embodiment of the present utility model, in figure, show a kind of miniature single cutting bit, it comprises: the first chip area 110, the second chip area 120, the mill back of the body 127 and main cutting edge 111.Described the first chip area 110 is spirally extended to brill tail by apex point, described the second chip area 120 is extended spirally to boring tail direction by apex point, but do not extend to brill tail, in the present embodiment, this second chip area 120 is arranged on the large head region of drill bit, that is to say that the length of the second chip area 120 is less than the length of described the first chip area 110.The described mill back of the body 127 afterbodys that are arranged at described the second chip area 120 join with it, and continue to extend to boring tail direction, and the mill back of the body 127 has identical helical angle with the second chip area 120, the same with the first chip area 110, extends to brill tail always.The mill that is connected to the second chip area 120 afterbodys is carried on the back while making drilling, and the friction of boring body and hole wall reduces, and bores position, body deformation effect hole precision thereby avoid excessive heating to cause.
Embodiment bis-:
Also be single cutting bit always as shown in Figure 6, different from embodiment mono-: the helical angle of the mill back of the body 127 is different with the helical angle of the second chip area 120; The mill back of the body 127 extends to boring tail direction, it is grinding into the degree of depth and reduces gradually, and finally end in the intersection location 129 in the first chip area 110, the fore-end of drill bit and the friction of hole wall are maximum, in the present embodiment, only at the fore-end of drill bit, the mill back of the body 127 is set, both can have avoided the problem that friction is larger, can avoid again the problem of the rear end part strength decreased that bores body.
Embodiment tri-:
A kind of twolip type microbit as Figure 7-8, it comprises: be symmetrical arranged the first chip area 110, the second chip area 120, the mill back of the body 127, and symmetrically arranged main cutting edge 111, main cutting edge 121.Wherein, described the first chip area 110 is spirally extended to brill tail by apex point, described the second chip area 120 is extended spirally to boring tail direction by apex point, but do not extend to brill tail, in the present embodiment, this second chip area 120 is arranged on the large head region of drill bit, that is to say that the length of the second chip area 120 is less than the length of described the first chip area 110.The described mill back of the body 127 afterbodys that are arranged at described the second chip area 120 join with it, and continue to extend to boring tail direction, the mill back of the body 127 has different helical angles with the second chip area 120, make like this mill back of the body 127 extend spirally one end apart from rear crossing with the first chip area, the mill back of the body 127 ends in this intersection location.In general, the friction of boring body fore-end and hole wall is larger, this setup, and one can reduce friction, and two can avoid boring the intensity of end is after one's death affected, because general cutter breaking all occurs in rear end part.
Embodiment tetra-
As shown in Figure 9, this min-cutter is similarly twolip type microbit, and the mill back of the body 127 comprises two the first parallel mill back of the body 127a and the second mill back of the body 127b, and the first mill back of the body 127a is identical with the helical angle of the second mill back of the body 127b, thereby the degree of depth of being convenient to be grinding into gradually, reduces friction.The first mill back of the body 127a and the second mill back of the body 127b join with the afterbody of the second chip area 120 respectively.Article two, parallel mill is carried on the back the friction that can further reduce to bore body and hole wall, meanwhile, two parallel modes is set and can avoids boring body structure and be subject to excessive impact.
Embodiment five
As shown in figure 10, this min-cutter of the present embodiment is twolip type microbit, and the helical angle of the mill back of the body 127 is different from the helical angle of the second chip area 120; The mill back of the body 127 extends to boring tail direction, and ends in the intersection location of the first chip area 110, and the degree of depth that is grinding into of the mill back of the body 127 is reduced to the direction of boring tail gradually by apex point, and then friction while reducing to be grinding into.
Above content is in conjunction with concrete preferred embodiment further detailed description of the utility model, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, can also make some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.
Claims (10)
1. a min-cutter, is characterized in that, comprising:
The first chip area, this first chip area is spirally extended to brill tail by apex point;
The second chip area, this second chip area is extended spirally to boring tail direction by apex point, and the length of this second chip area is less than the length of described the first chip area;
The mill back of the body, the afterbody that the described mill back of the body is arranged at described the second chip area joins with it, and continues to extend to boring tail direction.
2. min-cutter as claimed in claim 1, is characterized in that, the spiral angle of the described mill back of the body is identical with described the second chip area.
3. min-cutter as claimed in claim 2, is characterized in that, the described mill back of the body extends to brill tail.
4. min-cutter as claimed in claim 1, is characterized in that, the degree of depth that is grinding into of the described mill back of the body is being reduced to the direction of boring tail gradually by apex point.
5. min-cutter as claimed in claim 1, is characterized in that, the helical angle of described the second chip area is different from the helical angle of described the first chip area.
6. min-cutter as claimed in claim 1, is characterized in that, the helical angle of the described mill back of the body is different from the helical angle of described the second chip area.
7. min-cutter as claimed in claim 6, is characterized in that, the described mill back of the body ends in the intersection location of itself and the first chip area.
8. min-cutter as claimed in claim 1, is characterized in that, described mill knapsack is drawn together two first parallel mill back ofs the body and the second mill back of the body, and the described first mill back of the body is identical with the helical angle of the described second mill back of the body.
9. min-cutter as claimed in claim 1, is characterized in that, described min-cutter is single-blade type drill bit.
10. min-cutter as claimed in claim 1, is characterized in that, described min-cutter is twolip type microbit, and two main cutting edges of this twolip type microbit are symmetrical arranged, and described the first chip area and described the second chip area are also symmetrical arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320893108.9U CN203679361U (en) | 2013-12-31 | 2013-12-31 | Minitype tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320893108.9U CN203679361U (en) | 2013-12-31 | 2013-12-31 | Minitype tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203679361U true CN203679361U (en) | 2014-07-02 |
Family
ID=51001320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320893108.9U Expired - Fee Related CN203679361U (en) | 2013-12-31 | 2013-12-31 | Minitype tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203679361U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103752910A (en) * | 2013-12-31 | 2014-04-30 | 深圳市金洲精工科技股份有限公司 | Miniature cutter |
-
2013
- 2013-12-31 CN CN201320893108.9U patent/CN203679361U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103752910A (en) * | 2013-12-31 | 2014-04-30 | 深圳市金洲精工科技股份有限公司 | Miniature cutter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140702 Termination date: 20161231 |