CN104625169A - Tool used for drilling circuit board - Google Patents
Tool used for drilling circuit board Download PDFInfo
- Publication number
- CN104625169A CN104625169A CN201410832522.8A CN201410832522A CN104625169A CN 104625169 A CN104625169 A CN 104625169A CN 201410832522 A CN201410832522 A CN 201410832522A CN 104625169 A CN104625169 A CN 104625169A
- Authority
- CN
- China
- Prior art keywords
- face
- tool
- cutting
- boring cutter
- cutting edge
- 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.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/40—Flutes, i.e. chip conveying grooves
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling Tools (AREA)
Abstract
A tool used for drilling a circuit board comprises a working part and a connecting part. The working part is provided with a cylindrical working region, the front end face of the working region is a plane, an edge part is formed on the front end face, a cutting edge and a chip discharging groove are formed on the edge part, the cutting edge is used for drilling a machined object, and the chip discharging groove is used for containing cutting chips. The tool cutting edge angle of the edge part is zero degree, the tool back angle of the edge part ranges from 3 degrees to 10 degrees, and the edge part spirally extends to a basic end from the front end face along the periphery face of the working region. The connecting part is fixedly connected to the basic end of the working part and provided with a keeping structure kept in a tool keeping device. The working part is of a cutting edge structure like a reamer, machining size precision is high, and the surface roughness of drilled holes is low; in the machining process, cutting machining is completed mainly depending on the front end face of the cutting edge, in this way, the front end face of the working part is mainly abraded, and regrinding performance is good; because only one edge part is arranged, the tool is high in structural strength, good in resistance to breakage, simple in structure and easy to machine.
Description
Technical field
The present invention relates to circuit board processing technique field, particularly relate to a kind of circuit boring cutter.
Background technology
PCB(Printed Circuit Board), Chinese is printed circuit board, and also known as printed circuit board (PCB), printed substrate, being important electronic unit, is the supporter of electronic devices and components, is the supplier of electronic devices and components electrical connection.
In printed circuit is produced, need to carry out holing etc. manufacturing procedure to pcb board.Because compact product is constantly released in market, high function, the high speed etc. of marching toward two high epoch, and towards high frequency, at a high speed, many IO wafer trend development, printed circuit board (PCB) (PCB) design must be changed towards high density holes, fine live width, high-mechanic component orientation, and therefore holing, more shape is rigorous for quality requirements.In addition, the products such as wafer set, memory body or mobile phone are all the maximum application blocks of high-order encapsulating carrier plate, its main trend is exactly that volume is more and more little, the number adopted also increased more in the past, and boring aperture will be driven to downward-extension, and increased drill point demand.
Due to the compact designing requirement of product, the support plate a used number increases, the number of plies increases, and makes the increase in demand of high-order drill point.Drill bit, under long-term drilling uses, often can cause abrasion and the damage at cutting position, chisel edge face, make when digging into workpiece, forming very big resistance, and because relative contact is long-pending and frictional force is comparatively large, and then cause shorten the service life of drill bit.
Summary of the invention
Based on this, be necessary for the problems referred to above, provide a kind of periphery of front end face that can suppress to wear and tear, improve the resistance to property lost during Drilling operation, and inner wall roughness and abrasiveness again can be improved, and the simple circuit boring cutter of structure.
A kind of circuit boring cutter, comprise operate portions, there is the workspace in cylindrical shape, described workspace front end face is plane, and described front end face is formed with single blade, and described blade is formed with the cutting edge for implementing Drilling operation to machined object, and the chip area of accommodating cutting swarf, the tool cutting edge angle of described blade is 0 °, and tool back angle is 3 ~ 10 °, and described blade extends along workspace circumferential surface screw cardinal extremity from described front end face; And
Connecting portion, is fixedly connected on operate portions cardinal extremity, has the holding structure be maintained in tool holder.
Preferably, the relief angle of described blade is 0 °.
Preferably, the flute profile angle of described blade is 90 °.
Preferably, be provided with blocking surface between described flute bottom surface and described workspace circumferential surface, described blocking surface just to the cutting face of described cutting edge, and is arranged perpendicular to described groove bottom.
Preferably, described front end face is 40 ° ~ 50 ° to the helical angle that cardinal extremity extends.
Preferably, described operate portions is inserted and is fixedly welded on described connecting portion.
The boring cutter of foregoing circuit plate, operate portions adopts the edge structure of similar reamer, and accurate to dimension is high, and pore-forming surface roughness is low; And the main knife-edge leading end face that relies on completes machining in process, so wearing and tearing mainly concentrate on workspace front end face, then abrasiveness is good; Owing to being only provided with single blade, cutter structure intensity is high, and the resistance to property lost is good, and structure is simple, is easy to processing.
Accompanying drawing explanation
Fig. 1 is the structural representation of circuit boring cutter in an embodiment;
Fig. 2 is the workspace front end face partial structurtes schematic diagram of circuit boring cutter in an embodiment.
Detailed description of the invention
For the ease of understanding the present invention, below with reference to relevant drawings, the present invention is described more fully.Preferred embodiment of the present invention is given in accompanying drawing.But the present invention can realize in many different forms, is not limited to embodiment described herein.On the contrary, provide the object of these embodiments be make the understanding of disclosure of the present invention more comprehensively thorough.
As shown in Figure 1, a kind of circuit boring cutter, comprises operate portions 120 and connecting portion 110.
Operate portions 120 has the workspace in cylindrical shape, described workspace front end face 121 is in plane, described front end face is formed with single blade 129, described blade 129 is formed with the cutting edge 122 for implementing Drilling operation to machined object, and the chip area 123 of accommodating cutting swarf, the tool cutting edge angle of described blade 129 is 0 °, and tool back angle is 3 ~ 10 °, and described blade 129 extends along workspace circumferential surface 124 screw cardinal extremity 125 from described front end face 121.
Connecting portion 110, is fixedly connected on the cardinal extremity 125 of operate portions 120, has the holding structure be maintained in tool holder.
Wherein, tool holder refers to the cutter holding mechanism etc. of lathe etc.Described holding structure is corresponding according to cutter holding mode to be arranged, and this belongs to the mature technology in Cutting tool installation manner field, does not repeat its concrete structure and operation principle here.
The substrate of PCB mainly adopts the materials such as special material base such as paper substrate, glass fibre fabricbase, composite base, build-up multilayerboard base or pottery, and during Drilling operation, cutting resistance is little, but precision prescribed is high.Operate portions 120 of the present invention adopts the edge structure of similar reamer, and accurate to dimension is high, and pore-forming surface roughness is low.
Because the knife-edge leading end face 121 that relies on main in process completes machining, so wearing and tearing mainly concentrate on workspace front end face 121, and because described operate portions 120 is in cylindrical shape, when need grind again, main mill working area is anterior, and because described operate portions 120 is in cylindrical shape, then when grinding, radial dimension does not change, so abrasiveness is good again.
Owing to being only provided with single blade 129, cutter structure intensity is high, and the resistance to property lost is good, and structure is simple, is easy to processing.
When carrying out Drilling operation to the substrate of PCB, according to base material material, can choose reasonable 115 ~ 130,000 revs/min, feed velocity is 100 ~ 120 inch per minute clocks, cuts the cutting swarf formed and is placed in chip area 123, and discharge from workspace cardinal extremity 125.Compared to traditional drilling tool, its faster rotational speed, penetration rate slows down, and accurate to dimension is high, and pore-forming surface roughness is low.Be particularly suitable for the PCB substrate Drilling operation that the cutting swarfs such as pottery are pulverous base material.
As shown in Figure 2, in one embodiment, the relief angle of described blade 129 is 0 °.Also that is to say, the cutting face 128 at cutting edge 122 place is crossing with the circumferential surface 124 of workspace, and the structural strength of cutter like this is high, and structure is simple.And cutting swarf is not easily involved between cutter and substrate and affects inner wall roughness.
In a preferred embodiment, the flute profile angle of described blade 129 is 90 °.Cutter structure like this is simple, and difficulty of processing is low, and chip area 123 accommodation space is large, is more conducive to discharge cutting swarf, improves ease of use.
Wherein in an embodiment, be provided with blocking surface 127 between the groove bottom 126 of described chip area 123 and described workspace circumferential surface 124, described blocking surface 127 just to the cutting face 128 of described cutting edge 122, and is arranged perpendicular to described groove bottom 126.So, chip area 123 is enclosed to cover by cutting face 128, bottom land and blocking surface 127 and is formed, further increase the accommodation space of chip area 123, and blocking surface 127 blocks cutting swarf enters gap between cutter and hole wall, further avoid the impact of cutting swarf on hole inner wall roughness.
As shown in Figure 1, in a preferred embodiment, described front end face 121 is 40 ° ~ 50 ° to the helical angle that cardinal extremity 125 extends.So, in drilling process, cutting swarf easily retains in chip area 123 and is discharged operate portions 120 gradually, is not easily piled up in operate portions 120 front end face 121, further increases functional reliability.
Wherein in an embodiment, described operate portions 120 is inserted and is fixedly welded on described connecting portion 110.Adopt this connected mode, operate portions 120 is high with connecting portion 110 bonding strength, not easily produces the adverse effects such as vibration, further increase machining accuracy and service life in process.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (7)
1. a circuit boring cutter, is characterized in that, comprising:
Operate portions, there is the workspace in cylindrical shape, described workspace front end face is plane, described front end face is formed with single blade, described blade is formed with the cutting edge for implementing Drilling operation to machined object, and the chip area of accommodating cutting swarf, and the tool cutting edge angle of described blade is 0 °, tool back angle is 3 ~ 10 °, and described blade extends along workspace circumferential surface screw cardinal extremity from described front end face; And
Connecting portion, is fixedly connected on operate portions cardinal extremity, has the holding structure be maintained in tool holder.
2. circuit boring cutter according to claim 1, is characterized in that, the relief angle of described blade is 0 °.
3. circuit boring cutter according to claim 2, is characterized in that, the flute profile angle of described blade is 90 °.
4. circuit boring cutter according to claim 3, is characterized in that, is provided with blocking surface between described flute bottom surface and described workspace circumferential surface, and described blocking surface just to the cutting face of described cutting edge, and is arranged perpendicular to described groove bottom.
5. the circuit boring cutter according to claim 1 ~ 4 any one, is characterized in that, described front end face is 40 ° ~ 50 ° to the helical angle that cardinal extremity extends.
6. circuit boring cutter according to claim 5, is characterized in that, described operate portions is inserted and is fixedly welded on described connecting portion.
7. circuit boring cutter according to claim 1, is characterized in that, described application of cutting tool is in the PCB substrate Drilling operation of ceramic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410832522.8A CN104625169A (en) | 2014-12-29 | 2014-12-29 | Tool used for drilling circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410832522.8A CN104625169A (en) | 2014-12-29 | 2014-12-29 | Tool used for drilling circuit board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104625169A true CN104625169A (en) | 2015-05-20 |
Family
ID=53204663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410832522.8A Pending CN104625169A (en) | 2014-12-29 | 2014-12-29 | Tool used for drilling circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104625169A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109382861A (en) * | 2018-09-14 | 2019-02-26 | 深圳市雅信宏达电子科技有限公司 | A kind of method for processing forming of compound inner cord prepreg |
-
2014
- 2014-12-29 CN CN201410832522.8A patent/CN104625169A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109382861A (en) * | 2018-09-14 | 2019-02-26 | 深圳市雅信宏达电子科技有限公司 | A kind of method for processing forming of compound inner cord prepreg |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150520 |
|
| WD01 | Invention patent application deemed withdrawn after publication |