CN101314187B - Drilling tool - Google Patents
Drilling tool Download PDFInfo
- Publication number
- CN101314187B CN101314187B CN2008101090372A CN200810109037A CN101314187B CN 101314187 B CN101314187 B CN 101314187B CN 2008101090372 A CN2008101090372 A CN 2008101090372A CN 200810109037 A CN200810109037 A CN 200810109037A CN 101314187 B CN101314187 B CN 101314187B
- Authority
- CN
- China
- Prior art keywords
- boring bar
- tool
- bar tool
- apex point
- crest line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/0011—Working of insulating substrates or insulating layers
- H05K3/0044—Mechanical working of the substrate, e.g. drilling or punching
- H05K3/0047—Drilling of holes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/16—Perforating by tool or tools of the drill type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/04—Angles, e.g. cutting angles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/011—Micro drills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F2210/00—Perforating, punching, cutting-out, stamping-out, severing by means other than cutting of specific products
- B26F2210/08—Perforating, punching, cutting-out, stamping-out, severing by means other than cutting of specific products of ceramic green sheets, printed circuit boards and the like
Abstract
The invention provides an unprecedented drilling tool of strong usefulness. Despite a very small diameter, the drilling tool has no tendency to break, so frequent replacement is no use . Production and inspection can be readily managed due to a simple shape of the drilling tool which has one or plural spiral-shaped scrap exhaust grooves (1, 2). A flat drill point surface(5) not provided with a crest line placed crosswise to a tool central axis, is arranged on the top part of the drilling tool.
Description
Technical field
The present invention relates to a kind of boring bar tool.
Background technology
Common printed distributing board (PCB) is used drill, for example as shown in Figure 1, be provided with a pair of chip discharging grooves 21,22 with predetermined helical angle (ね じ れ angle) β, and formed cutting edge with predetermined drill point angle γ ' by the intersection crest line portion 25,26 of these chip discharging grooves 21,22 and major first flank 23,24.Number in the figure 28,29 is the second back knife face.
Therefore, the instrument of Fig. 1 amounts to has four apex point faces, has predetermined angular respectively by making each apex point face (back knife face), thereby forms chisel edge 27 near the most advanced and sophisticated central authorities of instrument.In addition, Fig. 1 (a) is a vertical view, and 1 (b) is front view, and 1 (c) is right side view.
But, follow highly integrated, the densification of electronic equipment in recent years, need on PCB, carry out the hole processing of very small diameter, therefore need also minor diameterization more of drill bit.
For example, sometimes the also very small diameter drill bit of tool using diameter about 0.05mm, but because the rigidity of instrument is minimum makes that to produce the possibility of losing big, need change instrument continually, perhaps need to take to process simultaneously to reduce countermeasure such as processing number of times PCB is stacked.
In addition, when carrying out the visual examination of apex point shape, about mensuration whether balanced (deflection of cutting edge and the off-centre of chisel edge) thus judge whether qualified, but if diameter diminishes then not only processing trouble, this inspection trouble that also can become.
Therefore, present situation is: though even for example disclose the little structure that also can guarantee the predetermined single cutting bit of rigidity of tool diameter in patent documentation 1, still can not get losing fully the life-span.In addition, because a plurality of apex point faces are arranged,, judge whether qualified inspection also bothers with the same in the past.
Patent documentation 1: TOHKEMY 2003-311522 communique
Summary of the invention
The present invention finishes in view of above-mentioned present situation, provides a kind of unprecedented practicality extremely excellent boring bar tool, though described boring bar tool diameter minimum being difficult for lost, need not frequent replacing naturally, and simple shape, makes easily and checks.
With reference to description of drawings purport of the present invention.
Boring bar tool of the present invention has one or more spiral helicine chip discharging grooves 1,2, it is characterized in that, described boring bar tool is provided with the smooth apex point face 5 that does not have the crest line that intersects with the tool focus axis at point, it is characterized in that, described boring bar tool constitutes and be provided with land portion 3,4 between a plurality of described chip discharging grooves, there is most advanced point in the long intersection crest line portion 6 in a plurality of intersection crest line portion 6,7 between described chip discharging grooves 1,2 and described apex point face 5, the 6 performance shear actions of described intersection crest line portion.
And on the basis of the described boring bar tool of first aspect present invention, described boring bar tool is characterised in that described apex point face 5 tilts with predetermined tilt angle alpha with respect to the tool focus axis.
And on the basis of the described boring bar tool of first aspect present invention, described boring bar tool is characterised in that tool diameter is below 0.2mm.
And on the basis of the described boring bar tool of second aspect present invention, described boring bar tool is characterised in that tool diameter is below 0.2mm.
And, in a fifth aspect of the present invention, the invention provides a kind of boring bar tool, described boring bar tool has one or more spiral helicine chip discharging grooves, point at described boring bar tool is provided with the smooth apex point face that does not have the crest line that intersects with the tool focus axis, described boring bar tool is characterised in that, in a plurality of described chip discharging grooves 1, be provided with land portion 3 between 2,4, in this land portion 3,4 and described apex point face 5 between a plurality of intersection crest line portion 8, there is most advanced point in the long intersection crest line portion 8 in 9, the 8 performance shear actions of described intersection crest line portion.
And on the basis of the described boring bar tool of one aspect of the present invention, described boring bar tool is characterised in that, the tilt angle alpha with respect to the tool focus axis of described apex point face 5 be set at 0 °～(90 °-helical angle).
And on the basis of the described boring bar tool of fifth aspect present invention, described boring bar tool is characterised in that, the angle of inclination with respect to the tool focus axis of described apex point face be set at 0 °～(90 °-helical angle).
And on the basis of the described boring bar tool of seventh aspect present invention, described boring bar tool is characterised in that described tilt angle alpha is set at 10 °～30 °.
And on the basis of the described boring bar tool of eighth aspect present invention, described boring bar tool is characterised in that described tilt angle alpha is set at 10 °～30 °.
Because the present invention constitutes like that by above-mentioned, so can provide a kind of unprecedented practicality extremely excellent boring bar tool,, need not frequent replacing naturally though described boring bar tool diameter minimum being difficult for lost, and simple shape, make easily and check.
Description of drawings
Fig. 1 is the diagrammatic illustration figure of conventional example.
Fig. 2 is the diagrammatic illustration figure of present embodiment.
Fig. 3 is the diagrammatic illustration figure of explanation apex point shape.
Fig. 4 is the diagrammatic illustration figure of explanation apex point shape.
Fig. 5 is the table that compares the life tools to present embodiment and conventional example.
Fig. 6 is the figure with respect to the angle of inclination compare tool life-span of apex point face.
Label declaration
1,2: chip discharging grooves;
3,4: land (land) portion;
5: the apex point face;
6,7:(chip discharging grooves and apex point face) intersection crest line portion;
8,9:(land portion and apex point face) intersection crest line portion;
α: angle of inclination.
The specific embodiment
Based on accompanying drawing effect of the present invention is shown and simple declaration preferred embodiment of the present invention.
Boring bar tool of the present invention is to be provided with a structure that does not have the smooth apex point face 5 of crest line at tool tip, with for example near tool tip central authorities, have chisel edge and have the common drill bit that is connected the cutting edge that forms predetermined drill point angle with this chisel edge with being provided with different, utilize thrust direction (tool spindle to) to bear the most of cutting resistance in the process of hole, correspondingly alleviate by the bending stress that is produced to the external force (cutting resistance in the process of hole) of rectangular direction with tool spindle with this, thereby be difficult for losing.
And then, the most outstanding part (with the crest line portion of intersecting of land portion or chip discharging grooves) of apex point face 5 with cut gradually when the workpiece machined surface contacts, but it is because different with above-mentioned common drill bit, be difficult to cut machined surface, so vibrate a little at cutting initial stage instrument, make that the aperture of entrance side is moderately enlarged, boring is simultaneously proceeded, therefore, it is big more the closer to the entrance side diameter that the shape of machining hole becomes, thereby the base end side of instrument is difficult for contacting with the machining hole inwall, thereby has suppressed to contact losing of causing owing to the base end side of instrument with the machining hole inwall.
And simple shape only needs will to form with suitable angle in suitable position the point removal of the tool materials of chip discharging grooves, just can easily form the apex point face 5 with desired cross sectional shape and desired tilt angle alpha.
And, because apex point face 5 has only one, therefore can as instrument, not produce situations such as the left and right sides of each apex point face is unbalanced with a plurality of apex point faces, do not need to carry out the symmetery inspection, and, do not need owing to the inspection that will form the back knife face width that carries out a plurality of back knife faces (apex point face), check and simplify and yield rate also is improved thereby can make.
Based on Fig. 2～Fig. 6 specific embodiments of the invention are described.
As shown in Figure 2, present embodiment is to be provided with spiral helicine first chip discharging grooves 1 and spiral helicine second chip discharging grooves 2 and to be provided with the boring bar tool of land portion 3,4 each other in this chip discharging grooves 1,2, and described boring bar tool is provided with the smooth apex point face 5 of a crest line that does not intersect with the tool focus axis at point.In addition, number in the figure the 6, the 7th, the intersection crest line portion of chip discharging grooves 1,2 and apex point face 5, label the 8, the 9th, the intersection crest line portion of land portion 3,4 and apex point face 5.
Particularly, present embodiment is to apply the present invention to the example of tool diameter (maximum outside diameter of blade) for the double flute drill bit of the very small diameter of 0.05mm.In addition, be not limited to the double flute drill bit, also can be applied to first-class other drill bits of single flute drill.And, be not limited to the instrument of very small diameter, also can be applied to the general tool that tool diameter surpasses 0.2mm.
Specifically describe each several part.
The tilt angle alpha that apex point face 5 tilts to be scheduled to respect to the tool focus axis.This tilt angle alpha is preferably set to: the helical angle of the angle parallel with the right angle orientation of tool axis (more than or equal to 0 °)≤α≤90 °-chip discharging grooves.Under the situation of α＞90 °-helical angle (in the present embodiment being 45 °), promptly under the situation of α＞90 °-45 °=45 °, the instrument apex point is crossed point and is easy to generate incompleteness, can cause cutting power to descend, lose the life-span by the apex point incompleteness and descend.Particularly, the tilt angle alpha of the apex point face of present embodiment is set at 20 °.
And, the apex point face 5 of present embodiment, by under the state that has formed chip discharging grooves 1,2 on the tool materials, at a predetermined angle the point of tool materials being removed in the precalculated position, thereby can form desired apex point face shape and desired tilt angle alpha, and, be broadly divided into following two kinds of shapes as the shape of apex point face 5.
First kind as shown in Figure 3, constitutes to have most advanced point (point that contacts with workpiece at first) in the intersection crest line portion 6 long in a plurality of intersection crest line portion 6,7 of chip discharging grooves 1,2 and apex point face 5, and described intersection crest line portion 6 brings into play shear actions; Second kind as shown in Figure 4, constitutes in the intersection crest line portion 8 long in a plurality of intersection crest line portion 8,9 of land portion 3,4 and apex point face 5 to have most advanced point, the 8 performance shear actions of described intersection crest line portion.In addition, the tilt angle alpha among Fig. 3,4 is set at 30 °.
In the present embodiment of Fig. 2, adopted first kind of structure, under this situation, owing in land portion 3,4 (periphery), there is not a most advanced point, therefore be not vulnerable to and the meet at right angles external force of direction of tool axis, can realize stable long lifetime.In addition, in second kind of structure, because most advanced in land portion 3,4 (periphery), thereby the cutting power raising, can access good hole quality (hole site precision, hole internal face roughness).
Because present embodiment constitutes like that by above-mentioned, there is not most advanced and sophisticated sharp-pointed portion (chisel edge portion) or has the concentrated part of external force such as cutting edge of common drill point angle, thereby be difficult to incision, not opposite not being vulnerable to and the meet at right angles external force of direction of tool axis, the intersection crest line portion of the rake face of this apex point face 5 and chip discharging grooves little by little processes machined surface, so tool tip is difficult for producing damaged.
And then, the intersection crest line portion 6 of the most outstanding part of apex point face 5 and chip discharging grooves 1 with cut gradually when machined surface contacts, but owing to be difficult to cut machined surface as described above, instrument can vibrate a little, make that the aperture of entrance side is moderately enlarged, boring is simultaneously proceeded, therefore, the shape of machining hole becomes and increases near entrance side diameter appropriateness, thereby, the base end side of instrument is difficult for contacting with the machining hole inwall, thereby has suppressed to contact losing of causing owing to the base end side of instrument with the machining hole inwall.
And, simple shape, the point of the tool materials that only need will to have formed chip discharging grooves in suitable position and angle is removed and just can easily be made.
In addition, because apex point face 5 has only one, therefore produce situations such as the left and right sides of each apex point face is unbalanced can be when not having a plurality of apex point face, do not need to carry out the symmetery inspection, and, do not need owing to the inspection that will form the back knife face width that carries out a plurality of back knife faces (apex point face), check and simplify and improve yield rate thereby can make.
And what can bring into play above-mentioned effect significantly is the situation of the instrument of tool diameter below 0.2mm.That is, because under the little situation of tool diameter, tool tip is damaged easily at the cutting initial stage, and therefore the structure that can reduce the present embodiment of external force as much as possible at this cutting initial stage is exceedingly useful.
Therefore, present embodiment provides a kind of unprecedented practicality extremely excellent boring bar tool, though described boring bar tool diameter minimum being difficult for lost, need not frequent replacing naturally, and simple shape, makes easily and checks.
With reference to accompanying experimental example above-mentioned effect is described.
As Fig. 5 is illustrated, utilization comes comparison and axis to be provided with the life tools of the instrument (conventional example) of structure described in the instrument (embodiment) of a smooth apex point face that does not have a crest line and Fig. 1 to the hole quantity of (hit) of PCB with meeting at right angles, what can confirm is: at the apex point face is when not having smooth unique of crest line, and be about about two times of life tools of existing structure with a plurality of apex point faces (most advanced and sophisticated back knife face) its life tools.
In addition, as Fig. 6 is illustrated, the angle of inclination that makes the smooth apex point face that does not have crest line changes between 0 ° (embodiment of Fig. 5)～45 °, the quantity that utilization is holed to PCB is come the compare tool life-span, can confirm between 0 °～45 ° lose the life-span than conventional example to lose the life-span long, and can confirm between 10 °～30 ° to lose the life-span long especially.
Claims (12)
1. boring bar tool, described boring bar tool has one or more spiral helicine chip discharging grooves,
Point at described boring bar tool is provided with the smooth apex point face that does not have the crest line that intersects with the tool focus axis, it is characterized in that,
Described boring bar tool constitutes between a plurality of described chip discharging grooves and is provided with land portion, there is most advanced point in the long intersection crest line portion in a plurality of intersection crest line portion between described chip discharging grooves and described apex point face, the performance shear action of described intersection crest line portion.
2. boring bar tool according to claim 1 is characterized in that,
Described apex point face is with respect to the inclined at inclination angles of tool focus axis to be scheduled to.
3. boring bar tool according to claim 1 is characterized in that,
Tool diameter is below 0.2mm.
4. boring bar tool according to claim 2 is characterized in that,
Tool diameter is below 0.2mm.
5. boring bar tool according to claim 1 is characterized in that,
Described apex point face with respect to the angle of inclination of tool focus axis be set at 0 °～(90 °-helical angle).
6. boring bar tool according to claim 5 is characterized in that,
Described angle of inclination is set at 10 °～30 °.
7. boring bar tool, described boring bar tool has one or more spiral helicine chip discharging grooves,
Point at described boring bar tool is provided with the smooth apex point face that does not have the crest line that intersects with the tool focus axis, it is characterized in that,
Described boring bar tool constitutes between a plurality of described chip discharging grooves and is provided with land portion, has most advanced point in the long intersection crest line portion in a plurality of intersection crest line portion between this land portion and described apex point face, the performance shear action of described intersection crest line portion.
8. boring bar tool according to claim 7 is characterized in that,
Described apex point face is with respect to the inclined at inclination angles of tool focus axis to be scheduled to.
9. boring bar tool according to claim 7 is characterized in that,
Tool diameter is below 0.2mm.
10. boring bar tool according to claim 8 is characterized in that,
Tool diameter is below 0.2mm.
11. boring bar tool according to claim 7 is characterized in that,
The angle of inclination with respect to the tool focus axis of described apex point face be set at 0 °～(90 °-helical angle).
12. boring bar tool according to claim 11 is characterized in that,
Described angle of inclination is set at 10 °～30 °.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007142432A JP4324211B2 (en) | 2007-05-29 | 2007-05-29 | Drilling tool |
| JP2007-142432 | 2007-05-29 | ||
| JP2007142432 | 2007-05-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101314187A CN101314187A (en) | 2008-12-03 |
| CN101314187B true CN101314187B (en) | 2010-07-14 |
Family
ID=40105420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101090372A Expired - Fee Related CN101314187B (en) | 2007-05-29 | 2008-05-23 | Drilling tool |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP4324211B2 (en) |
| KR (1) | KR101042084B1 (en) |
| CN (1) | CN101314187B (en) |
| TW (1) | TW200900183A (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4564562B2 (en) * | 2008-11-28 | 2010-10-20 | ユニオンツール株式会社 | Drilling tool |
| JP2011212804A (en) * | 2010-03-31 | 2011-10-27 | Union Tool Co | Drilling tool |
| CN102653011B (en) * | 2011-03-04 | 2014-11-05 | 创国精密股份有限公司 | Single-cutting drill point structure |
| CN102294505B (en) * | 2011-08-08 | 2013-07-17 | 深圳市金洲精工科技股份有限公司 | Mother-and-son edge microbit and processing method thereof |
| US9133595B2 (en) * | 2013-12-03 | 2015-09-15 | Hubbell Incorporated | Bent blade screw ground anchor |
| CN103752911B (en) * | 2013-12-31 | 2017-08-25 | 深圳市金洲精工科技股份有限公司 | A kind of microbit and its processing method |
| CN106312142A (en) * | 2015-06-30 | 2017-01-11 | 上海嘉捷通电路科技股份有限公司 | High-precision board back drilling bit for manufacturing of PCB and application thereof |
| JP7082934B2 (en) * | 2018-10-31 | 2022-06-09 | ユニオンツール株式会社 | Drilling tool and its manufacturing method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002205212A (en) * | 2001-01-05 | 2002-07-23 | Mitsubishi Materials Corp | Drill |
| JP2003311522A (en) | 2002-04-26 | 2003-11-05 | Sumitomo Electric Ind Ltd | One-flute drill |
-
2007
- 2007-05-29 JP JP2007142432A patent/JP4324211B2/en active Active
-
2008
- 2008-05-07 TW TW097116820A patent/TW200900183A/en not_active IP Right Cessation
- 2008-05-14 KR KR1020080044387A patent/KR101042084B1/en active IP Right Grant
- 2008-05-23 CN CN2008101090372A patent/CN101314187B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2008296296A (en) | 2008-12-11 |
| JP4324211B2 (en) | 2009-09-02 |
| TW200900183A (en) | 2009-01-01 |
| TWI367139B (en) | 2012-07-01 |
| CN101314187A (en) | 2008-12-03 |
| KR20080104962A (en) | 2008-12-03 |
| KR101042084B1 (en) | 2011-06-16 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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: 20100714 Termination date: 20190523 |