CN109158731A - Superaudio DC pulse welding supply suitable for Underwater Welding - Google Patents
Superaudio DC pulse welding supply suitable for Underwater Welding Download PDFInfo
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- CN109158731A CN109158731A CN201811216271.5A CN201811216271A CN109158731A CN 109158731 A CN109158731 A CN 109158731A CN 201811216271 A CN201811216271 A CN 201811216271A CN 109158731 A CN109158731 A CN 109158731A
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- 238000003466 welding Methods 0.000 title claims abstract description 62
- 238000001914 filtration Methods 0.000 claims abstract description 6
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 230000009131 signaling function Effects 0.000 claims description 3
- 230000009194 climbing Effects 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 230000005611 electricity Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 210000001367 artery Anatomy 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/095—Monitoring or automatic control of welding parameters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/0061—Underwater arc welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
- B23K9/1006—Power supply
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
- B23K9/1006—Power supply
- B23K9/1043—Power supply characterised by the electric circuit
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding Control (AREA)
Abstract
The invention discloses a kind of superaudio DC pulse welding supplies suitable for Underwater Welding, including current rectifying and wave filtering circuit, background current generation circuit, peak point current generation circuit, peak point current switching circuit, umbilical cable, signal control module, DSP control circuit and driving circuit.Background current generation circuit is for generating background current Ib, peak point current generation circuit is for generating peak point current Ip, peak point current generate major loop generate electric current peak point current switching circuit is conveyed to by umbilical cable, obtain pulse peak current Ipp.Background current IbWith pulse peak current IppSuperposition, obtained pulse current supply electrode and workpiece.Under water during hyperbaric welding, feedback signal passes through the signal control module of load end, DSP control circuit is conveyed in the form of CAN bus, feedback signal can be quickly transferred in control circuit, signal is acquired and is handled, the output characteristics of welding effectively can be controlled and be adjusted.
Description
Technical field
The present invention relates to a kind of superaudio DC pulse source of welding current technologies more particularly to a kind of suitable for Underwater Welding
Superaudio DC pulse welding supply.
Background technique
The major parameter of high frequency pulse current welding power supply is pulse frequency and duty ratio, with digital circuit ratio simulation electricity
Road flexibility is stronger, quick for pulse frequency and the adjustable waveform enhanced convenience of duty ratio with digital signal processor DSP,
Introduce DSP in high frequency pulse power supply design scheme and have become a kind of trend, the high-frequency high-power pulse power generally by two sets or
More set DC loop parallel connections are quenched to be formed, and increases control system itself to sample rate, operational precision, arithmetic speed, control
Various requirements such as input, control output.
Under water when hyperbaric welding, conventional inverter arc welding power source is by Current Voltage Setting signal with closed loop
Negative-feedback realizes, transmission path of the cable for needing to grow very much as feedback signal.Since power supply controls the limitation of basic principle,
And the presence of welding cable loop inductance, there is very big negative effect to signal transmission, makes the received feedback letter of Arc Welding Power
It number is distorted, such Arc Welding Power is deteriorated to the regulation and control of welding process, influences welding quality.
Summary of the invention
The object of the present invention is to provide a kind of superaudio DC pulses suitable for Underwater Welding based on CAN bus control
Welding supply.
The purpose of the present invention is what is be achieved through the following technical solutions:
Superaudio DC pulse welding supply suitable for Underwater Welding of the invention, including current rectifying and wave filtering circuit,
Peak point current generation circuit, background current generation circuit, peak point current switching circuit, umbilical cable, signal control module, DSP
Control circuit and three driving circuits；
The background current generation circuit generates background current Ib, and is applied to the cathode terminal of power diode Dp, by peak
It is worth current generating circuit and generates peak point current Ip, peak point current Ip is by umbilical cable through power switch Tp, power diode
Pulse peak current Ipp is exported after Dp, then, background current Ib is overlapped with pulse peak current Ipp, obtains pulse current
Supply electrode and workpiece.
As seen from the above technical solution provided by the invention, provided in an embodiment of the present invention suitable for Underwater Welding
Superaudio DC pulse welding supply can be at a distance by Current Voltage applied to the welding of underwater dry-type hyperbaric environment
Feedback signal passes through the acquisition and processing of the signal control module positioned at load end, is transferred directly to by way of CAN bus
DSP control circuit, is transported in bridge inverter main circuit through overdrive circuit, to the output characteristics of welding carry out effective control with
It adjusts.
Detailed description of the invention
Fig. 1 is the electricity of the superaudio DC pulse welding supply provided in an embodiment of the present invention suitable for Underwater Welding
Road schematic diagram；
Fig. 2 is the schematic diagram of signal control module in the embodiment of the present invention；
Fig. 3 is DSP control circuit and other control circuit component connection schematic diagrams in the embodiment of the present invention.
Specific embodiment
The embodiment of the present invention will be described in further detail below.What is be not described in detail in the embodiment of the present invention is interior
Appearance belongs to the prior art well known to professional and technical personnel in the field.
Superaudio DC pulse welding supply suitable for Underwater Welding of the invention, preferable specific embodiment party
Formula is:
Including current rectifying and wave filtering circuit, peak point current generation circuit, background current generation circuit, peak point current switching circuit,
Umbilical cable, signal control module, DSP control circuit and three driving circuits；
The background current generation circuit generates background current Ib, and is applied to the cathode terminal of power diode Dp；By peak
It is worth current generating circuit and generates peak point current Ip, peak point current Ip is by umbilical cable through power switch Tp, power diode
Pulse peak current Ipp is exported after Dp；Then, background current Ib and pulse peak current Ipp is overlapped, and obtains pulse current
Supply electrode and workpiece.
In the peak point current generation circuit: the first current sensor feeds back first on the first transformer B1 of acquisition
Current signal, which exports, gives DSP control circuit, and first fed-back current signals are peak-current signal and pwm pulse signal；
The DSP control circuit exports received first fed-back current signals closed-loop control, and through the first driving circuit
After act on the first bridge inverter main circuit；
In the background current generation circuit: the second current sensor feeds back second on the second transformer B2 of acquisition
DC signal output gives DSP control circuit, and second fed-back current signals are peak-current signal and pwm pulse signal；
The DSP control circuit exports received second feedback direct current signal closed-loop control, and through the second driving circuit
After act on the second bridge inverter main circuit；
The peak point current switching circuit includes that peak voltage absorbs protection circuit, and the peak voltage absorbs protection circuit
For absorbing peak voltage, when peak voltage transfinites, for generating protection signal, realize when peak voltage transfinites to pulse
The protection of Arc Welding Power circuit；
The peak point current switching circuit is made according to the pulse protection signal that the peak voltage absorbs protection electronic feedback
For the signal control module, pulse frequency and the duty ratio generation that the DSP control circuit is inputted by CAN bus are used for
The pulse train of third driving circuit, the pulse train is through third driving circuit and acts on the fence G of power switch Tp, controls
The shutdown or conducting of inverter bridge processed, to change the size of output voltage.
The digital signal processor end of the signal control module is connect with the transceiver interface of the CAN bus, will be passed
The collected feedback signal of sensor is input in the A/D conversion module of DSP control circuit, total with CAN after being converted into digital signal
The mode of line is transferred to DSP control circuit from load end at a distance.
The CAN bus mouth of the DSP control circuit is connect with the transceiver interface of the CAN bus, the DSP control electricity
Digital I/O mouthfuls of road connect with the pwm pulse signal input terminal of third driving circuit, and the number that CAN bus transmission comes up is believed
Number pass through PID arithmetic, export pwm pulse signal into driving circuit, while DSP control circuit also with the first current sensor and
Second current sensor is connected.
The peak point current generation circuit output voltage is 50-70V, and output electric current is 1-300A；Background current generates electricity
Road output voltage is 50-70V, and output electric current is 1-300A；The power frequency at electrode and workpiece both ends be more than or equal to 20KHz,
The climbing of pulse current is more than or equal to 50A/ μ s.
Feedback signal is transferred to DSP control circuit by the way of CAN bus, reduces the decaying of feedback signal, makes anti-
Feedback signal can be quickly transferred in control circuit, be acquired and handled to signal, can be had to the output characteristics of welding
The control and adjusting of effect.
Superaudio DC pulse welding supply suitable for Underwater Welding of the invention is applied to underwater dry-type high pressure
The welding of environment.Current Voltage feedback signal can be passed through adopting for the signal control module positioned at load end by the device at a distance
Collection and processing, are transferred directly to DSP control circuit by way of CAN bus, are transported to bridge type inverse electricity through overdrive circuit
Lu Zhong carries out effective control to the output characteristics of welding and adjusts.
In the present invention, the current rectifying and wave filtering circuit is made of rectifier bridge, filter capacitor.Peak point current generation circuit is by first
Bridge inverter main circuit, the first transformer B1, diode D1And D2, inductance Lp, first sensor, the first driving circuit, DSP control
Circuit composition.The first current sensor is by the first transformer B of acquisition in peak point current generation circuit1On the first peak point current
Signal, which exports, gives DSP control circuit, and DSP control circuit handles received peak-current signal, exports the first PWM arteries and veins
Punching, the first pwm pulse signal are acted on after the first driving circuit on the first bridge inverter main circuit.
In the present invention, the background current generation circuit is by the second bridge inverter main circuit, the second transformer B2, diode D3
And D4, inductance Lb, second sensor, the second driving circuit, DSP control circuit composition, generate background current Ib.Background current produces
Second sensor is by the second transformer B of acquisition in raw circuit2On background current signal export and give DSP control circuit, DSP control
Circuit processed handles received background current signal, exports the second pwm pulse, the second pwm pulse signal is through the second driving
It is acted on after circuit on the second bridge inverter main circuit.
In the present invention, the peak point current switching circuit is by power switch Tp, power diode Dp, peak voltage absorb protect
Protection circuit, signal control module, CAN bus control, third driving circuit composition.Peak voltage absorbs protection circuit for absorbing
Due to voltage spikes, for generating protection signal, realizes the protection to pulsed arc-welding power source circuit when peak voltage transfinites.Under water
Peak point current switching circuit connect with peak point current generation circuit and background current generation circuit by cable, circuit is sometimes
Due to voltage spikes is generated, peak voltage is parallel in order to realize the protection to Arc Welding Power circuit, between electrode and workpiece and absorbs guarantor
Protection circuit.When peak voltage transfinites, protect signal function in signal control module, DSP control circuit according to the pulse of feedback
The pulse frequency and duty ratio that are inputted by CAN bus generate the pulse train for being used for third driving circuit, pulse train warp
It third driving circuit and acts on the fence G of power switch Tp, the shutdown or conducting of inverter bridge is controlled, to change output voltage
Size.
The present invention is the superaudio DC pulse welding supply suitable for Underwater Welding, due to using peak value of pulse electricity
The combination for flowing switching circuit, background current generation circuit and peak point current generation circuit, realizes ultrasonic square wave direct current pulse
The output of electric current；CAN bus control technology application realizes the intelligence and networking of arc-welding control, reduces feedback signal
Decaying, enables feedback signal to be quickly transferred in control circuit, is acquired and handles to signal, can be special to the output of welding
Property is effectively controlled and is adjusted.
Specific embodiment:
As shown in Figure 1, the power supply device is mainly generated by current rectifying and wave filtering circuit, peak point current generation circuit, background current
Circuit, peak point current switching circuit composition.The first current sensor is by the first transformer of acquisition in peak point current generation circuit
DSP control circuit is given in the first fed-back current signals (i.e. peak-current signal) output on B1, and DSP control circuit is to received the
One pwm pulse signal closed-loop control output, pulse signal are acted on after the first driving circuit on the first bridge inverter main circuit；Base
It is worth second sensor in current generating circuit to control the second feedback DC signal output on the second transformer B2 of acquisition to DSP
Circuit processed, DSP control circuit export received second pwm pulse signal closed-loop control, and pulse signal is through the second driving circuit
After act on the second bridge inverter main circuit；Peak voltage absorbs protection circuit for absorbing due to voltage spikes, when peak voltage is super
In limited time, for generating protection signal, the protection to pulsed arc-welding power source circuit is realized when peak voltage transfinites, according to feedback
The pulse frequency and duty ratio life that pulse protects signal function to input in signal control module, DSP control circuit by CAN bus
At the pulse train for third driving circuit, the pulse train is through third driving circuit and the fence for acting on power switch Tp
On G, the shutdown or conducting of inverter bridge are controlled, to change the size of output voltage.
Refering to what is shown in Fig. 2, the digital signal processor end of signal control module is connect with CAN bus transceiver interface, it will
The collected feedback signal of sensor is input in the A/D conversion module of DSP control circuit, after being converted into digital signal, with CAN
The mode of bus is transferred to DSP control circuit from load end at a distance.
With reference to Fig. 3, the CAN bus mouth of the DSP control circuit is connect with CAN bus transceiver interface, DSP control circuit
Digital I/O mouthfuls connect with the pwm pulse signal input terminal of third driving circuit, CAN bus is transmitted into the digital signal come up
By PID arithmetic, output pwm signal is into driving circuit, while DSP control circuit is also electric with the first current sensor and second
Flow sensor is connected.
The present invention is the superaudio DC pulse welding supply suitable for Underwater Welding, the working principle of the device
It is: background current Ib is generated by background current generation circuit, and is applied to the cathode terminal of power diode Dp；It is produced by peak point current
Raw circuit generates peak point current Ip, and peak point current Ip is exported after power switch Tp, power diode Dp by umbilical cable
Pulse peak current Ipp；Then, background current Ib and pulse peak current Ipp is overlapped, and obtains pulse current supply electrode
With workpiece.
For apparatus of the present invention under water during hyperbaric welding, feedback signal passes through the signal control module of load end,
It is transferred to DSP control circuit in a manner of CAN bus, reduces the decaying of feedback signal, feedback signal is enable quickly to transmit
Into control circuit, signal is acquired and is handled, the output characteristics of welding effectively can be controlled and be adjusted.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Within the technical scope of the present disclosure, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Subject to enclosing.
Claims (6)
1. a kind of superaudio DC pulse welding supply suitable for Underwater Welding, which is characterized in that including rectifying and wave-filtering
Circuit, peak point current generation circuit, background current generation circuit, peak point current switching circuit, umbilical cable, signal observing and controlling mould
Block, DSP control circuit and three driving circuits；
The background current generation circuit generates background current (Ib), and is applied to the cathode terminal of power diode (Dp)；By peak
It is worth current generating circuit and generates peak point current (Ip), peak point current Ip is by umbilical cable through power switch (Tp), power two
Pole pipe (Dp) exports pulse peak current (Ipp) afterwards, and then, background current (Ib) is overlapped with pulse peak current (Ipp),
Obtain pulse current supply electrode and workpiece.
2. the superaudio DC pulse welding supply according to claim 1 suitable for Underwater Welding, feature exist
In in the peak point current generation circuit: the first current sensor is electric by the first feedback on the first transformer (B1) of acquisition
Stream signal, which exports, gives DSP control circuit, and first fed-back current signals are peak-current signal and pwm pulse signal；
The DSP control circuit exports received first fed-back current signals closed-loop control, and makees after the first driving circuit
With on the first bridge inverter main circuit；
In the background current generation circuit: the second current sensor is straight by the second feedback on the second transformer (B2) of acquisition
Stream signal, which exports, gives DSP control circuit, and second fed-back current signals are peak-current signal and pwm pulse signal；
The DSP control circuit makees received second feedback direct current signal closed-loop control output after the second driving circuit
With on the second bridge inverter main circuit；
The peak point current switching circuit includes that peak voltage absorbs protection circuit, and the peak voltage absorbs protection circuit and is used for
Peak voltage is absorbed, when peak voltage transfinites, for generating protection signal, is realized when peak voltage transfinites to pulsed arc welding
The protection of power circuit；
The peak point current switching circuit according to the peak voltage absorb protection electronic feedback pulse protection signal function in
The signal control module, the pulse frequency and duty ratio that the DSP control circuit is inputted by CAN bus are generated for third
The pulse train of driving circuit, the pulse train is through third driving circuit and acts on the fence G of power switch Tp, controls inverse
Become the shutdown or conducting of bridge, to change the size of output voltage.
3. the superaudio DC pulse welding supply according to claim 2 suitable for Underwater Welding, feature exist
In the digital signal processor end of the signal control module is connect with the transceiver interface of the CAN bus, and sensor is adopted
The feedback signal collected is input in the A/D conversion module of DSP control circuit, after being converted into digital signal, with the side of CAN bus
Formula is transferred to DSP control circuit from load end at a distance.
4. the superaudio DC pulse welding supply according to claim 3 suitable for Underwater Welding, feature exist
In the CAN bus mouth of the DSP control circuit is connect with the transceiver interface of the CAN bus, the DSP control circuit
Digital I/O mouthfuls connect with the pwm pulse signal input terminal of third driving circuit, and the digital signal that CAN bus transmission comes up is passed through
Cross PID arithmetic, export pwm pulse signal into driving circuit, at the same DSP control circuit also with the first current sensor and second
Current sensor is connected.
5. the superaudio DC pulse welding supply according to any one of claims 1 to 4 suitable for Underwater Welding,
It is characterized in that, the peak point current generation circuit output voltage is 50-70V, output electric current is 1-300A；Background current generates
Circuit output voltage is 50-70V, and output electric current is 1-300A；The power frequency at electrode and workpiece both ends be more than or equal to
The climbing of 20KHz, pulse current are more than or equal to 50A/ μ s.
6. the superaudio DC pulse welding supply according to any one of claims 1 to 4 suitable for Underwater Welding,
It is characterized in that, feedback signal is transferred to DSP control circuit by the way of CAN bus, reduces the decaying of feedback signal, make
Feedback signal can be quickly transferred in control circuit, be acquired and handled to signal, can be carried out to the output characteristics of welding
Effective control and adjusting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811216271.5A CN109158731A (en) | 2018-10-18 | 2018-10-18 | Superaudio DC pulse welding supply suitable for Underwater Welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811216271.5A CN109158731A (en) | 2018-10-18 | 2018-10-18 | Superaudio DC pulse welding supply suitable for Underwater Welding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109158731A true CN109158731A (en) | 2019-01-08 |
Family
ID=64878326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811216271.5A Pending CN109158731A (en) | 2018-10-18 | 2018-10-18 | Superaudio DC pulse welding supply suitable for Underwater Welding |
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| CN (1) | CN109158731A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110064817A (en) * | 2019-05-29 | 2019-07-30 | 华南理工大学 | Fast frequency pulse TIG welding connects power supply low-and high-frequency energy conversion and compound circuit |
| CN110102858A (en) * | 2019-05-29 | 2019-08-09 | 华南理工大学 | The asymmetric absorbing circuit of power supply peak voltage is connect for fast frequency pulse TIG welding |
| CN110729914A (en) * | 2019-11-04 | 2020-01-24 | 北京航空航天大学 | Closed-loop regulated high-precision superaudio pulse power supply |
| CN115846822A (en) * | 2023-01-30 | 2023-03-28 | 华南理工大学 | All-position local dry-method underwater fast-frequency TIG welding system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110064817A (en) * | 2019-05-29 | 2019-07-30 | 华南理工大学 | Fast frequency pulse TIG welding connects power supply low-and high-frequency energy conversion and compound circuit |
| CN110102858A (en) * | 2019-05-29 | 2019-08-09 | 华南理工大学 | The asymmetric absorbing circuit of power supply peak voltage is connect for fast frequency pulse TIG welding |
| CN110729914A (en) * | 2019-11-04 | 2020-01-24 | 北京航空航天大学 | Closed-loop regulated high-precision superaudio pulse power supply |
| CN115846822A (en) * | 2023-01-30 | 2023-03-28 | 华南理工大学 | All-position local dry-method underwater fast-frequency TIG welding system |
| CN115846822B (en) * | 2023-01-30 | 2024-04-26 | 华南理工大学 | All-position local dry underwater fast-frequency TIG welding system |
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Application publication date: 20190108 |
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| RJ01 | Rejection of invention patent application after publication |