CN2671726Y - Contact type broken cutter monitor for PCB drilling machine - Google Patents
Contact type broken cutter monitor for PCB drilling machine Download PDFInfo
- Publication number
- CN2671726Y CN2671726Y CN 200420015113 CN200420015113U CN2671726Y CN 2671726 Y CN2671726 Y CN 2671726Y CN 200420015113 CN200420015113 CN 200420015113 CN 200420015113 U CN200420015113 U CN 200420015113U CN 2671726 Y CN2671726 Y CN 2671726Y
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- monitor
- broken cutter
- cutter
- drilling machine
- breaking
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Abstract
The utility model relates to a contact type broken cutter monitor for a PCB drilling machine, comprising a high-frequency signal generator, a transmission return circuit and a broken cutter detection circuit. The transmission return circuit consists of a spindle of the PCB drilling machine, a drilling cutter, a pressing foot on the head part of the spindle, an aluminum sheet on a workpiece and a high-frequency transformer. The input terminal of the broken cutter detection circuit is connected with the sublevel of the high-frequency transformer, and the output terminal of the broken cutter detection circuit provides a condition signal of whether a monitored drilling cutter is broken or not to a control system. The contact type broken cutter monitor has low cost, simple structure and convenient installation. The contact type broken cutter monitor can avoid false alarm produced by that the optical fiber of a traditional opto-electronic monitor is not in horizontal alignment. At the same time, the output signal of the contact type broken cutter monitor can be used as a fast drill signal, so the equipment is abridged and the cost of the equipment is decreased.
Description
Technical field
The utility model relates to the broken cutter monitor of PCB drilling machine, specifically is a kind of contact broken cutter monitor of the PCB of being used for drilling machine.
Background technology
The conventional borehole machine generally adopts the method for optical fiber correlation to the monitoring of breaking, usually adopt a laser generation and processor and two optical fiber to finish, article two, light output end and the light input end with processor takes place in optical fiber one termination laser, article two, the other end of optical fiber all is fixed on the presser feet of drilling machine and horizontal aligument, laser takes place with processor the laser that produces to be passed through an Optical Fiber Transmission to presser feet, another optical fiber receives the laser of an Optical Fiber Transmission, and it is sent back to laser takes place and processor, laser takes place with processor this signal to be delivered to control system, its monitoring principle is: the cutter in main shaft has blocked laser, then thinking does not have breaking, do not block laser, then think breaking.The defective that said method exists is: 1, laser generation and processor and optical fiber are all relatively more expensive; 2, adjustment difficulty when if two optical fiber do not have horizontal aligument or cutter to fail just in time path by laser, then can produce wrong report.
For quick brill function, the conventional borehole machine generally uses optoelectronic switch to handle, and covers the light source of optoelectronic switch when cutter rises, and optoelectronic switch is sent into this signal in the control system and handled.This shows that the conventional borehole machine uses different sensors to handle the breaking monitoring respectively with the quick function of boring, and so not only make machine complicated more, and the cost aspect is difficult to lower.
Summary of the invention
In order to overcome the prior art above shortcomings, the utility model provides a kind of contact broken cutter monitor of the PCB of being used for drilling machine, and this device has also been realized the function of quick brill when realizing the breaking monitoring.
The technical solution of the utility model is achieved in that it comprises: a high-frequency signal generator, and it is used to the PCB drilling machine that breaking monitor signal source is provided; One transmission loop, it contain the PCB drilling machine main shaft portion, bore cutter, be positioned at the presser feet of spindle nose, the aluminium flake above the workpiece and a high frequency transformer, the elementary end of high frequency transformer connects the main shaft shell, the elementary other end of high frequency transformer connects the earth or high-frequency signal generator output, and described presser feet connects high-frequency signal generator output or greatly; And, a breaking testing circuit, the described high frequency transformer of input termination of this breaking testing circuit secondary, output provides monitored brill cutter breaking whether status signal for control system.
This contact broken cutter monitor cost is low, simple in structure, easy for installation, the wrong report that can effectively avoid traditional photoelectric monitor device not have horizontal aligument to produce owing to optical fiber, simultaneously the output signal of this device signal that can be used as quick brill uses, thereby has simplified equipment, reduced the production cost of equipment.
Description of drawings
Fig. 1 is a theory diagram of the present utility model;
Fig. 2 is the circuit diagram of its exemplary embodiments;
Fig. 3 is a typical connection diagram in transmission loop;
Fig. 4 is another typical connection diagram in transmission loop.
The specific embodiment
Be described further below in conjunction with accompanying drawing.
Embodiment 1:
As shown in Figure 1, the contact broken cutter monitor that originally is used for the PCB drilling machine comprises: a high-frequency signal generator 1 is used to the PCB drilling machine that breaking monitor signal source is provided;
One transmission loop 2, it contains main shaft portion, brill cutter 25, the presser feet 24 that is positioned at spindle nose, the aluminium flake above the workpiece 26 and a high frequency transformer 27 of PCB drilling machine, high frequency transformer 27 elementary ends connect main shaft shell 21, the high frequency transformer 27 elementary other ends connect the earth, and described presser feet 24 connects high-frequency signal generator 1 output;
And, a breaking testing circuit 3, the described high frequency transformer 27 of input termination of this breaking testing circuit secondary, output provides monitored brill cutter breaking whether status signal for control system.
In described transmission loop 2, spindle rotor 23 in the main shaft shell 21 of main shaft portion, the main shaft shell 21 and gas-bearing formation between the two 22 constitute a high frequency capacitance, have realized the transmission of high-frequency signal between main shaft shell 21 and spindle rotor 23.
The high-frequency signal generator 1 of this broken cutter monitor comprises the power amplifier 13 that high-frequency oscillating circuits 11 and two compound transistors constitute, and is connected to the isolation level 12 between high-frequency oscillating circuits 11 and the power amplifier 13.As shown in Figure 2, described high-frequency oscillating circuits 11 comprises amplifier U1A, the in-phase end of amplifier U1A connects biasing resistor R1 and below-center offset resistance R 2 respectively, connecting resistance R3 between the output of amplifier U1A and the in-phase end, connecting resistance R4 between the output of amplifier U1A and the end of oppisite phase, the anti-phase termination capacitor C 6 of amplifier U1A is to ground; The push-pull amplifier that power amplifier 13 is made up of multiple tube Q1 and Q2 and resistance R 8, R9, R10; The input that is coupled to power amplifier 13 by resistance R 7 after the high-frequency signal shaping that the follower that isolation level 12 adopts amplifier U1B to constitute, follower produce high-frequency oscillating circuits 11 amplifies.
The breaking testing circuit 3 of this broken cutter monitor comprises input circuit 31, the output termination comparator 32 of input circuit 31, and comparator 32 output termination phase inverters 33 are to an input of control system.As shown in Figure 2, series resistance R11, diode D2 and resistance R 12 between two inputs of described input circuit 31, resistance R 12 two ends parallel diode D3 and filter capacitor C4, the output of input circuit 31 is coupled to the inverting input of comparator 32 by capacitor C L1, and described comparator 32 is made up of amplifier U2A and biasing resistor R13, the R14, the R15 that are connected to its in-phase end; Described phase inverter 33 constitutes the output of the described comparator 32 of anti-phase termination of amplifier U2B by amplifier U2B and the upper offset resistance R 17 and the below-center offset resistance R 18 that are connected to its in-phase end.
Operation principle below in conjunction with this broken cutter monitor of Fig. 1-3 narration:
During work, high-frequency signal generator 1 produces high-frequency signal, this high-frequency signal is received presser feet 24, during boring presser feet 24 with bore cutter 25 and all contact with aluminium flake 26 above the workpiece, this high-frequency signal is by presser feet 24, aluminium flake 26 is transferred to and bores cutter 25, and then by spindle rotor 23, the high frequency capacitance that gas-bearing formation 22 between spindle rotor 23 and the main shaft shell 21 constitutes is transferred to main shaft shell 21, primary coil by high frequency transformer 27 flows into the earth then, the secondary coil of high frequency transformer 27 is coupled to breaking testing circuit 3 with this high-frequency signal simultaneously, through over commutation, filtering, relatively, anti-phase back produces logical signal, and be transferred to control system, if bore cutter 25 fractures in the course of the work, then boring cutter 25 can't contact with aluminium flake 26, transmission loop 2 is disconnected, do not have signal to be coupled to breaking testing circuit 3 from high frequency transformer 27, the output state of breaking testing circuit 3 changes, control system is learnt bored the cutter fracture, thereby realization is to the monitoring of breaking.
In the utility model, when the point of a knife that bores cutter 25 leaves or touches aluminium flake 26, the output state of this broken cutter monitor all overturns once, its output signal and tradition are bored fast the identical of input signal that function adopts, therefore this signal can be used as the input signal that bores function fast, mechanism that so both can simplified apparatus can save manufacturing cost again.
Embodiment 2:
Claims (5)
1, a kind of contact broken cutter monitor that is used for the PCB drilling machine is characterized in that comprising:
One high-frequency signal generator is used to the PCB drilling machine that breaking monitor signal source is provided;
One transmission loop, it contain the PCB drilling machine main shaft portion, bore cutter, be positioned at the presser feet of spindle nose, the aluminium flake above the workpiece and a high frequency transformer, the elementary end of high frequency transformer connects the main shaft shell, the elementary other end of high frequency transformer connects the earth or high-frequency signal generator output, and described presser feet connects high-frequency signal generator output or greatly; And,
One breaking testing circuit, the described high frequency transformer of input termination of this breaking testing circuit secondary, output provides monitored brill cutter breaking whether status signal for control system.
2, according to the contact broken cutter monitor of claim 1, it is characterized in that: in described transmission loop, spindle rotor in the main shaft shell of main shaft portion, the main shaft shell and gas-bearing formation between the two constitute a high frequency capacitance.
3, according to the contact broken cutter monitor of claim 1, it is characterized in that: the high-frequency signal generator comprises the power amplifier that high-frequency oscillating circuits and two compound transistors constitute, and can connect an isolation level between high-frequency oscillating circuits and the power amplifier.
4, according to the contact broken cutter monitor of claim 1, it is characterized in that: the breaking testing circuit comprises an input circuit, output termination one amplifier of input circuit, and amplifier output is connected to an input.
5, according to the contact broken cutter monitor of claim 4, it is characterized in that: series resistance R11, diode D2 and resistance R 12 between two inputs of breaking testing circuit, resistance R 12 two ends parallel diode D3 and filter capacitor C4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420015113 CN2671726Y (en) | 2004-01-16 | 2004-01-16 | Contact type broken cutter monitor for PCB drilling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420015113 CN2671726Y (en) | 2004-01-16 | 2004-01-16 | Contact type broken cutter monitor for PCB drilling machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2671726Y true CN2671726Y (en) | 2005-01-19 |
Family
ID=34482811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420015113 Expired - Lifetime CN2671726Y (en) | 2004-01-16 | 2004-01-16 | Contact type broken cutter monitor for PCB drilling machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2671726Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104765071A (en) * | 2015-03-23 | 2015-07-08 | 广东工业大学 | Needle breakage detection circuit for PCB drilling machine and detection method thereof |
| CN104786265A (en) * | 2015-04-23 | 2015-07-22 | 惠州市大亚湾天马电子机械有限公司 | Inductive microcurrent cutter breaking detection circuit |
| TWI508813B (en) * | 2013-05-29 | 2015-11-21 | Chang Chung Chien | CNC micro - cutter detection device and its method |
| CN111381288A (en) * | 2020-04-13 | 2020-07-07 | 深圳市强华科技发展有限公司 | PCB drilling machine knife-breaking detection circuit and detection method thereof |
-
2004
- 2004-01-16 CN CN 200420015113 patent/CN2671726Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI508813B (en) * | 2013-05-29 | 2015-11-21 | Chang Chung Chien | CNC micro - cutter detection device and its method |
| CN104765071A (en) * | 2015-03-23 | 2015-07-08 | 广东工业大学 | Needle breakage detection circuit for PCB drilling machine and detection method thereof |
| CN104765071B (en) * | 2015-03-23 | 2018-04-13 | 广东工业大学 | A kind of broken pin test circuit and its detection method for PCB drilling machines |
| CN104786265A (en) * | 2015-04-23 | 2015-07-22 | 惠州市大亚湾天马电子机械有限公司 | Inductive microcurrent cutter breaking detection circuit |
| CN111381288A (en) * | 2020-04-13 | 2020-07-07 | 深圳市强华科技发展有限公司 | PCB drilling machine knife-breaking detection circuit and detection method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20140116 Granted publication date: 20050119 |