CN100449032C - Application of electromagnetic field in increasing drill bit life for PCB - Google Patents
Application of electromagnetic field in increasing drill bit life for PCB Download PDFInfo
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- CN100449032C CN100449032C CNB2007100518951A CN200710051895A CN100449032C CN 100449032 C CN100449032 C CN 100449032C CN B2007100518951 A CNB2007100518951 A CN B2007100518951A CN 200710051895 A CN200710051895 A CN 200710051895A CN 100449032 C CN100449032 C CN 100449032C
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Abstract
This invention relates the application of electromagnetic field in increasing life time of PCB drills including: fixing a drill on a clamp apparatus, putting the clamp apparatus in a HF induction coil then to be set in a LF excitation coil to process the drill by the magnetic field, and the drill receives magnetic energy, electric energy and mechanical energy at the same time.
Description
Technical field
The invention belongs to the metallic substance process field, particularly improve inserted drill wear resistance technology.
Background technology
Inserted drill is widely used in fields such as electron trade, mechanical processing industry, mining industry, construction industry, automobile industry.
The processing of printed circuit board (PCB) (being called for short PCB) is directly connected to the quality and the cost of electronic product, is a very important link in the electron trade.Wherein, inserted drill is the key tool during PCB produces, and the life-span of improving inserted drill has become worldwide research focus.At present the approach that adopts comprises two kinds of coversion material prescription and processing modes.
In processing mode, thermal treatment can effectively improve the wear resistance of inserted drill and be used widely.But because the unrelieved stress that heat treatment process produces is difficult to the wear resistance of inserted drill is brought into play to greatest extent; In addition, the scaling loss of distortion, oxidation and part element that heat treatment process is introduced makes thermal treatment not limit use range as final operation.
Summary of the invention
For overcoming the defectives such as scaling loss of distortion, oxidation and part element that the unrelieved stress that produces in the existing heat treatment technics and heat treatment process introduce.The present invention proposes a kind of raising inserted drill method of life.This method mainly reduces the unrelieved stress of Wimet bonding phase metal Co by electromagnetic field effect, and other element of dissolved is separated out with the form of small carbide particle among the phase Co that will bond, the direct effect that produces is to strengthen bonding phase, make the WC particle in the Wimet more be difficult to peel off, thereby improve the life-span of inserted drill.
The feature of this technology is that inserted drill is fixed on the jig, and the jig that fixes inserted drill is put into a radio-frequency induction coil, and the radio-frequency induction coil that drill bit and jig will be housed again is placed in the low frequency excitation coil.
During work, because the inner induced current that produces of inserted drill can make inserted drill be subjected to the effect of lorentz's force under the action of a magnetic field, under certain induction frequencies and strength condition, the lorentz's force that is produced makes inserted drill be in vibration condition.Like this, processed inserted drill receives the energy of three parts simultaneously: first part is the magnetic energy from the low frequency excitation coil, the vibration mechanical energy that the electric energy that second section induces in workpiece from radio-frequency induction coil, third part come self-induction current and magnetic field coupling to produce.
Concrete technology technical scheme is as follows:
In the operation, can select the suitable radio-frequency induction coil and the operating parameters of low frequency excitation coil according to the different model of processing drill bit.Parameter is chosen as preferably:
First part produces the equipment and the parameter of magnetic energy: field power supply is produced by Beijing Wei Dun company, model is RJ-50, the low frequency excitation coil turn is the 100-250 circle, and field power supply is directly coupled together with lead and low frequency excitation coil, can produce required magnetic field.The parameter area of handling is: alternating-current peak point current 30-70 ampere, frequency 10-20Hz.
Second section produces the equipment and the parameter of induction electric energy: induction power supply is produced by Shanghai Teng Chang company, and model is GP26, and radio-frequency induction coil is the 3-4 circle, and the output terminal of induction power supply is connected on the radio-frequency induction coil, can produce required induced current.The parameter area of handling is: frequency 5-15kHz, output rating 1_4kW.
After being fixed on drill bit on the jig, open low frequency excitation power supply and high frequency induction power supply simultaneously, after work for some time, promptly finish processing drill bit.The general treatment time is more than the 30s, preferred 30s～150s.
Description of drawings
Fig. 1 electromagnetic field is handled the inserted drill synoptic diagram.
Among the figure, 1---jig, 2---inserted drill, 3---radio-frequency induction coil, 4---the low frequency excitation coil
Embodiment
Below only be preferred embodiment of the present invention, when not limiting scope of the present invention with this.Promptly the equalization of being done according to the present patent application claim generally changes and modifies, and all should still belong in the scope that patent of the present invention contains.
The power taking sub-industry is bonded on the jig platform by double faced adhesive tape with 50 on Wimet φ 0.075*1 drill bit, low frequency excitation power supply output 30A alternating-current, frequency 10Hz, low frequency excitation coil turn 100 circles; Induction power supply output frequency 5kHz, output rating 1kW, radio-frequency induction coil 3 circles; Treatment time 30s.Treated drill point compares test with the undressed drill bit of same batch of production under identical working conditions, the result shows, every undressed drill point can be made a call to 2000 qualified holes altogether, and every of treated drill point can be made a call to 8000 qualified holes, and the life-span is improved 3 times.
The power taking sub-industry is bonded on the jig platform by double faced adhesive tape with 50 on Wimet φ 0.105*1.5 drill bit, low frequency excitation power supply output 35A alternating-current, frequency 12Hz, low frequency excitation coil turn 120 circles; Induction power supply output frequency 5kHz, output rating 2kW, radio-frequency induction coil 3 circles; Treatment time 35s.Treated drill point compares test with the undressed drill bit of same batch of production under identical working conditions, the result shows, every undressed drill point can be made a call to 2000 qualified holes altogether, and every of treated drill point can be made a call to 8100 qualified holes, and the life-span is improved 3.05 times.
The power taking sub-industry is bonded on the jig platform by double faced adhesive tape with 50 on Wimet φ 0.15*2.5 drill bit, low frequency excitation power supply output 40A alternating-current, frequency 12Hz, low frequency excitation coil turn 120 circles; Induction power supply output frequency 10kHz, output rating 2kW, radio-frequency induction coil 3 circles; Treatment time 50s.Treated drill point compares test with the undressed drill bit of same batch of production under identical working conditions, the result shows, every undressed drill point can be made a call to 1800 qualified holes altogether, and every of treated drill point can be made a call to 6400 qualified holes, and the life-span is improved 2.56 times.
The power taking sub-industry is bonded on the jig platform by double faced adhesive tape with 50 on Wimet φ 0.2*4 drill bit, low frequency excitation power supply output 40A alternating-current, frequency 12Hz, low frequency excitation coil turn 200 circles; Induction power supply output frequency 10kHz, output rating 2kW, radio-frequency induction coil 4 circles; Treatment time 80s.Treated drill point compares test with the undressed drill bit of same batch of production under identical working conditions, the result shows, every undressed drill point can be made a call to 2000 qualified holes altogether, and every of treated drill point can be made a call to 7200 qualified holes, and the life-span is improved 2.6 times.
Embodiment 5
The power taking sub-industry is bonded on the jig platform by double faced adhesive tape with 50 on Wimet φ 0.25*4 drill bit, low frequency excitation power supply output 50A alternating-current, frequency 12Hz, low frequency excitation coil turn 200 circles; Induction power supply output frequency 15kHz, output rating 2.4kW, radio-frequency induction coil 4 circles; Treatment time 100s.Treated drill point compares test with the undressed drill bit of same batch of production under identical working conditions, the result shows, every undressed drill point can be made a call to 2000 qualified holes altogether, and every of treated drill point can be made a call to 8000 qualified holes, and the life-span is improved 3 times.
Embodiment 6
The power taking sub-industry is bonded on the jig platform by double faced adhesive tape with 50 on Wimet φ 0.25*4.5 drill bit, low frequency excitation power supply output 50A alternating-current, frequency 12Hz, low frequency excitation coil turn 200 circles; Induction power supply output frequency 15kHz, output rating 2.4kW, radio-frequency induction coil 4 circles; Treatment time 120s.Treated drill point compares test with the undressed drill bit of same batch of production under identical working conditions, the result shows, every undressed drill point can be made a call to 2000 qualified holes altogether, and every of treated drill point can be made a call to 8200 qualified holes, and the life-span is improved 3.1 times.
Embodiment 7
The power taking sub-industry is bonded on the jig platform by double faced adhesive tape with 50 on Wimet φ 0.3*5 drill bit, low frequency excitation power supply output 50A alternating-current, frequency 12Hz, low frequency excitation coil turn 250 circles; Induction power supply output frequency 15kHz, output rating 2.8kW, radio-frequency induction coil 4 circles; Treatment time 150s.Treated drill point compares test with the undressed drill bit of same batch of production under identical working conditions, the result shows, every undressed drill point can be made a call to 2000 qualified holes altogether, and every of treated drill point can be made a call to 6400 qualified holes, and the life-span is improved 2.2 times.
Embodiment 8
The power taking sub-industry is bonded on the jig platform by double faced adhesive tape with 50 on Wimet φ 0.3*5.5 drill bit, low frequency excitation power supply output 50A alternating-current, frequency 12Hz, low frequency excitation coil turn 250 circles; Induction power supply output frequency 15kHz, output rating 2.8kW, radio-frequency induction coil 4 circles; Treatment time 150s.Treated drill point compares test with the undressed drill bit of same batch of production under identical working conditions, the result shows, every undressed drill point can be made a call to 2000 qualified holes altogether, and every of treated drill point can be made a call to 6000 qualified holes, and the life-span is improved 2 times.
Embodiment 9
The power taking sub-industry is bonded on the jig platform by double faced adhesive tape with 50 on Wimet φ 0.3*6 drill bit, low frequency excitation power supply output 55A alternating-current, frequency 12Hz, low frequency excitation coil turn 250 circles; Induction power supply output frequency 15kHz, output rating 2.8kW, radio-frequency induction coil 4 circles; Treatment time 150s.Treated drill point compares test with the undressed drill bit of same batch of production under identical working conditions, the result shows, every undressed drill point can be made a call to 2000 qualified holes altogether, and every of treated drill point can be made a call to 6000 qualified holes, and the life-span is improved 2 times.
Embodiment 10
The power taking sub-industry is bonded on the jig platform by double faced adhesive tape with 50 on Wimet φ 0.3*6.5 drill bit, low frequency excitation power supply output 60A alternating-current, frequency 15Hz, low frequency excitation coil turn 250 circles; Induction power supply output frequency 15kHz, output rating 3.5kW, radio-frequency induction coil 4 circles; Treatment time 150s.Treated drill point compares test with the undressed drill bit of same batch of production under identical working conditions, the result shows, every undressed drill point can be made a call to 2000 qualified holes altogether, and every of treated drill point can be made a call to 6000 qualified holes, and the life-span is improved 2 times.
Embodiment 11
The power taking sub-industry is bonded on the jig platform by double faced adhesive tape with 50 on Wimet φ 0.35*5 drill bit, low frequency excitation power supply output 60A alternating-current, frequency 15Hz, low frequency excitation coil turn 250 circles; Induction power supply output frequency 15kHz, output rating 3.5kW, radio-frequency induction coil 4 circles; Treatment time 150s.Treated drill point compares test with the undressed drill bit of same batch of production under identical working conditions, the result shows, every undressed drill point can be made a call to 2000 qualified holes altogether, and every of treated drill point can be made a call to 6000 qualified holes, and the life-span is improved 2 times.
Embodiment 12
The power taking sub-industry is bonded on the jig platform by double faced adhesive tape with 50 on Wimet φ 0.35*5.5 drill bit, low frequency excitation power supply output 60A alternating-current, frequency 15Hz, low frequency excitation coil turn 250 circles; Induction power supply output frequency 15kHz, output rating 3.5kW, radio-frequency induction coil 4 circles; Treatment time 150s.Treated drill point compares test with the undressed drill bit of same batch of production under identical working conditions, the result shows, every undressed drill point can be made a call to 2000 qualified holes altogether, and every of treated drill point can be made a call to 6000 qualified holes, and the life-span is improved 2 times.
Embodiment 13
The power taking sub-industry is bonded on the jig platform by double faced adhesive tape with 50 on Wimet φ 0.35*6 drill bit, low frequency excitation power supply output 60A alternating-current, frequency 15Hz, low frequency excitation coil turn 250 circles; Induction power supply output frequency 15kHz, output rating 4kW, radio-frequency induction coil 4 circles; Treatment time 150s.Treated drill point compares test with the undressed drill bit of same batch of production under identical working conditions, the result shows, every undressed drill point can be made a call to 2000 qualified holes altogether, and every of treated drill point can be made a call to 6000 qualified holes, and the life-span is improved 2 times.
Embodiment 14
The power taking sub-industry is bonded on the jig platform by double faced adhesive tape with 50 on Wimet φ 0.35*6.5 drill bit, low frequency excitation power supply output 65A alternating-current, frequency 18Hz, low frequency excitation coil turn 250 circles; Induction power supply output frequency 15kHz, output rating 4kW, radio-frequency induction coil 4 circles; Treatment time 150s.Treated drill point compares test with the undressed drill bit of same batch of production under identical working conditions, the result shows, every undressed drill point can be made a call to 2000 qualified holes altogether, and every of treated drill point can be made a call to 7000 qualified holes, and the life-span is improved 2.5 times.
Embodiment 15
The power taking sub-industry is bonded on the jig platform by double faced adhesive tape with 50 on Wimet φ 0.35*6.8 drill bit, low frequency excitation power supply output 65A alternating-current, frequency 18Hz, low frequency excitation coil turn 250 circles; Induction power supply output frequency 15kHz, output rating 4kW, radio-frequency induction coil 4 circles; Treatment time 150s.Treated drill point compares test with the undressed drill bit of same batch of production under identical working conditions, the result shows, every undressed drill point can be made a call to 2000 qualified holes altogether, and every of treated drill point can be made a call to 7200 qualified holes, and the life-span is improved 2.6 times.
Embodiment 16
The power taking sub-industry is bonded on the jig platform by double faced adhesive tape with 50 on Wimet φ 0.4*6 drill bit, low frequency excitation power supply output 65A alternating-current, frequency 20Hz, low frequency excitation coil turn 250 circles; Induction power supply output frequency 15kHz, output rating 4kW, radio-frequency induction coil 4 circles; Treatment time 150s.Treated drill point compares test with the undressed drill bit of same batch of production under identical working conditions, the result shows, every undressed drill point can be made a call to 3000 qualified holes altogether, and every of treated drill point can be made a call to 8100 qualified holes, and the life-span is improved 1.7 times.
Embodiment 17
The power taking sub-industry is bonded on the jig platform by double faced adhesive tape with 50 on Wimet φ 0.4*6.5 drill bit, low frequency excitation power supply output 65A alternating-current, frequency 20Hz, low frequency excitation coil turn 250 circles; Induction power supply output frequency 15kHz, output rating 4kW, radio-frequency induction coil 4 circles; Treatment time 150s.Treated drill point compares test with the undressed drill bit of same batch of production under identical working conditions, the result shows, every undressed drill point can be made a call to 3000 qualified holes altogether, and every of treated drill point can be made a call to 8000 qualified holes, and the life-span is improved 1.7 times.
Embodiment 18
The power taking sub-industry is bonded on the jig platform by double faced adhesive tape with 50 on Wimet φ 0.4*7 drill bit, low frequency excitation power supply output 65A alternating-current, frequency 20Hz, low frequency excitation coil turn 250 circles; Induction power supply output frequency 15kHz, output rating 4kW, radio-frequency induction coil 4 circles; Treatment time 150s.Treated drill point compares test with the next treated drill bit of same batch of production under identical working conditions, the result shows, every undressed drill point can be made a call to 3000 qualified holes altogether, and every of treated drill point can be made a call to 8200 qualified holes, and the life-span is improved 1.73 times.
Embodiment 19
The power taking sub-industry is bonded on the jig platform by double faced adhesive tape with 50 on Wimet φ 0.45*6 drill bit, low frequency excitation power supply output 70A alternating-current, frequency 20Hz, low frequency excitation coil turn 250 circles; Induction power supply output frequency 15kHz, output rating 4kW, radio-frequency induction coil 4 circles; Treatment time 150s.Treated drill point compares test with the undressed drill bit of same batch of production under identical working conditions, the result shows, every undressed drill point can be made a call to 3000 qualified holes altogether, and every of treated drill point can be made a call to 8100 qualified holes, and the life-span is improved 1.7 times.
Embodiment 20
The power taking sub-industry is bonded on the jig platform by double faced adhesive tape with 50 on Wimet φ 0.45*6.5 drill bit, low frequency excitation power supply output 70A alternating-current, frequency 20Hz, low frequency excitation coil turn 250 circles; Induction power supply output frequency 15kHz, output rating 4kW, radio-frequency induction coil 4 circles; Treatment time 150s.Treated drill point compares test with the undressed drill bit of same batch of production under identical working conditions, the result shows, every undressed drill point can be made a call to 3000 qualified holes altogether, and every of treated drill point can be made a call to 8000 qualified holes, and the life-span is improved 1.7 times.
Embodiment 21
The power taking sub-industry is bonded on the jig platform by double faced adhesive tape with 50 on Wimet φ 0.45*7 drill bit, low frequency excitation power supply output 70A alternating-current, frequency 20Hz, low frequency excitation coil turn 250 circles; Induction power supply output frequency 15kHz, output rating 4kW, radio-frequency induction coil 4 circles; Treatment time 150s.Treated drill point compares test with the undressed drill bit of same batch of production under identical working conditions, the result shows, every undressed drill point can be made a call to 3000 qualified holes altogether, and every of treated drill point can be made a call to 8100 qualified holes, and the life-span is improved 1.7 times.
Claims (6)
1. electromagnetic field is improving PCB with the application on the bit life, comprise: processed drill bit is fixed on the jig, the jig that fixes drill bit is put into a radio-frequency induction coil, the radio-frequency induction coil that drill bit and jig will be housed again is placed in the low frequency excitation coil, utilizes electromagnetic field to handle drill bit.
2. electromagnetic field according to claim 1 is improving PCB with the application on the bit life, wherein, the low frequency excitation coil turn is 100～250 circles, field power supply and low frequency excitation coil are coupled together, produce required magnetic field, the parameter area of handling is: 30～70 amperes of alternating-current peak point currents, frequency 10～20Hz.
3. electromagnetic field according to claim 1 is improving PCB with the application on the bit life, wherein, radio-frequency induction coil is 3～4 circles, the output terminal of induction power supply is connected on the radio-frequency induction coil, produce required induced current, the parameter area of handling is: frequency 5～15kHz, output rating 1～4kW.
4. electromagnetic field according to claim 2 is improving PCB with the application on the bit life, wherein, radio-frequency induction coil is 3～4 circles, the output terminal of induction power supply is connected on the radio-frequency induction coil, produce required induced current, the parameter area of handling is: frequency 5～15kHz, output rating 1～4kW.
5. improving PCB with the application on the bit life according to the described arbitrary electromagnetic field of claim 1～4, wherein, the time that electromagnetic field is handled drill bit is at least 30s.
6. electromagnetic field according to claim 5 is improving PCB with the application on the bit life, and wherein, the time that electromagnetic field is handled drill bit is 30～150s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100518951A CN100449032C (en) | 2007-04-17 | 2007-04-17 | Application of electromagnetic field in increasing drill bit life for PCB |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100518951A CN100449032C (en) | 2007-04-17 | 2007-04-17 | Application of electromagnetic field in increasing drill bit life for PCB |
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| Publication Number | Publication Date |
|---|---|
| CN101033531A CN101033531A (en) | 2007-09-12 |
| CN100449032C true CN100449032C (en) | 2009-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2007100518951A Active CN100449032C (en) | 2007-04-17 | 2007-04-17 | Application of electromagnetic field in increasing drill bit life for PCB |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2033819U (en) * | 1987-10-22 | 1989-03-08 | 刘庆昌 | Magnetic strengthening machine for cutting tools |
| US5813265A (en) * | 1997-12-12 | 1998-09-29 | General Electric Company | Balanced electromagnetic peening |
| CN1702188A (en) * | 2005-06-06 | 2005-11-30 | 辽宁工学院 | Method for preparing nanocystalline ingot casting by magnetic field and ultrasonic combined treatment of metal melt and dedicated apparatus therefor |
-
2007
- 2007-04-17 CN CNB2007100518951A patent/CN100449032C/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2033819U (en) * | 1987-10-22 | 1989-03-08 | 刘庆昌 | Magnetic strengthening machine for cutting tools |
| US5813265A (en) * | 1997-12-12 | 1998-09-29 | General Electric Company | Balanced electromagnetic peening |
| CN1702188A (en) * | 2005-06-06 | 2005-11-30 | 辽宁工学院 | Method for preparing nanocystalline ingot casting by magnetic field and ultrasonic combined treatment of metal melt and dedicated apparatus therefor |
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|---|---|
| CN101033531A (en) | 2007-09-12 |
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Owner name: WUHAN JINGTAI LIMITED COMPANY Free format text: FORMER NAME: WUHAN TGS CRYSTAL LIMITED |
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Address after: 430056 No. 266 Taizi Lake Road, Wuhan economic and Technological Development Zone, Hubei Patentee after: Wuhan Jing Thai Polytron Technologies Inc Address before: 430058, Hubei Wuhan Wuhan economic and Technological Development Zone hi tech park, building 20, 3 floor Patentee before: Wuhan TGS Crystal Limited |