CN109317805A - In conjunction with the percussion welder control device and control method of PLC - Google Patents
In conjunction with the percussion welder control device and control method of PLC Download PDFInfo
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- CN109317805A CN109317805A CN201811496537.6A CN201811496537A CN109317805A CN 109317805 A CN109317805 A CN 109317805A CN 201811496537 A CN201811496537 A CN 201811496537A CN 109317805 A CN109317805 A CN 109317805A
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- module
- plc
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- charging
- storage capacitor
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Classifications
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- 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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/24—Electric supply or control circuits therefor
- B23K11/26—Storage discharge 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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/24—Electric supply or control circuits therefor
- B23K11/25—Monitoring devices
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Generation Of Surge Voltage And Current (AREA)
Abstract
The present invention relates to the percussion welder control device of combination PLC a kind of and control methods.The device includes rectification circuit；The output par, c of rectification circuit is separately connected storage capacitor and welding transformer, constitutes charge circuit and welding transformer circuit；Storage capacitor two sides are connected with voltage acquisition module；Voltage acquisition module is connected to an one-chip computer module, and the control instruction output par, c of one-chip computer module is separately connected charging trigger circuit and discharge trigger circuit for controlling charge silicon-controlled and discharging thyristor on-off；One-chip computer module is also connected with a PLC module, and exchanges information with PLC module；PLC module is connected with the cylinder control module for controlling welding electrode driving cylinder movement.Present system setting is convenient, the scope of application is very wide, upgrading is convenient；It can either guarantee capacitor fast charging, and can be avoided discharging thyristor and be not switched off and burn out current-limiting resistance, reduce equipment failure rate.
Description
Technical field
The present invention relates to the control technology of electric welding equipment, the percussion welder control device of specifically a kind of combination PLC and control
Method processed.
Background technique
The principle of percussion welder is to be charged to electric energy in capacitor to store, and is then disposably bled off in the welding process.Because
As long as capacitor both end voltage is consistent, then the energy discharged is consistent, therefore percussion welder working condition has very high stabilization
Property, it is easy to be influenced by power network fluctuation unlike AC welding set.But the controller of existing stored energy welding exists during the work time
Railway Project:
Since welding circuit mainly carries out electric discharge and charge control by silicon-controlled, if discharging thyristor does not have reliable turn-off,
It charges silicon-controlled and starts to work at this time, then just there is always voltage at charging capacitor both ends, discharging thyristor will be closed always not
Disconnected, common situation is exactly to burn out current-limiting resistance, causes equipment fault.It is using delay side that the prior art, which solves the above problems,
Formula, all delay a period of time and then chargings after electric discharge every time, but with the aging of electrolytic capacitor, capacitor internal resistance increases,
Discharge time also will increase, and such as adjusts not in time, still results in failure.
2, existing controller generallys use single-chip microcontroller and carries out centralized control, and the operation program of existing automatic welding device
It is required that becoming increasingly complex, with the controller of microcomputer development, not only modification program is troublesome every time, program is more, and preservation is also very numb
Tired, it is very difficult to carry out automation Aided design, is also unfavorable for the secondary development that user carries out operation program.
Summary of the invention
The technical problem to be solved by the invention is to provide one kind can reduce discharge fault damage percussion welder, control
Processing efficient, the percussion welder control device of combination PLC reliable, program is easy to adjust and the control method based on the device.
The percussion welder control device of present invention combination PLC includes the rectification circuit that importation is connect with AC network,
The on-off of rectification circuit is by charging SCR control；The output par, c of rectification circuit is separately connected storage capacitor and welding transformation
Device constitutes charge circuit and welding transformer circuit, and the electric discharge that welding transformer circuit is connected with control loop on-off in can
Control silicon；The storage capacitor two sides are connected with the voltage acquisition module for being able to detect storage capacitor voltage；The voltage acquisition mould
The signal output end of block is connected to an one-chip computer module, and the control instruction output par, c of one-chip computer module is separately connected for controlling
The silicon-controlled charging trigger circuit and discharge trigger circuit with discharging thyristor on-off of system charging；One-chip computer module is also connected with one
PLC module, and information is exchanged with PLC module；The PLC module is connected with the gas for controlling welding electrode driving cylinder movement
Cylinder control module, the start button for inputting enabling signal and for showing and inputting the human-computer interaction mould of operating parameter
Block.
The present invention is based on the percussion welder control method of above-mentioned control device the following steps are included:
A. welding enabling signal is sent to one-chip computer module by PLC module, is controlled and is charged according to welding procedure by one-chip computer module
Circuit charge and discharge and the welding of welding transformer loop start；
B. one-chip computer module receives the 0 ~ 5V voltage transmitted by PLC module, and corresponding charging voltage is 0 ~ 400V, right accordingly
The voltage of storage capacitor is controlled；
C. one-chip computer module by the signal that voltage acquisition module acquires judge storage capacitor occur charging under-voltage fault, charged
When rushing failure and discharge fault, corresponding failure signal is exported to PLC module, is issued by PLC module by human-computer interaction module
Alarm signal；
D. it in welding process, by PLC module according to welding procedure, is instructed to corresponding cylinder control module output cylinder movement,
Welding electrode is cooperated to complete welding movement.
It further, is more than that setting time charges less than in above-mentioned steps c, when charging, one-chip computer module is defeated to PLC module
Charge under-voltage fault signal out；Storage capacitor voltage exceeds always setting range when charging, and one-chip computer module is exported to PLC module
Charging overshoot fault-signal；Discharge signal is given twice, storage capacitor voltage zero is but not detected, one-chip computer module is to PLC
Module exports discharge fault signal.
Further, single-chip microcontroller during the charging process, acquires storage capacitor both end voltage signal by voltage acquisition module；
One-chip computer module triggering charging is silicon-controlled after detecting that storage capacitor both end voltage is 0V starts to charge, and charges one and sets
Charging duration after, if the preset voltage value of setting is not achieved in storage capacitor voltage at this time, stop charging one section setting
Suspend duration, repeatedly this process, starts to continue charging until storage capacitor voltage is more than preset voltage value, until energy storage
Operating voltage needed for capacitor is filled to welding.
Further, the preferred value of the charging duration is 50ms, and the preferred value of preset voltage value is 50V, suspends duration
Preferred value be 100ms.
The invention has the advantages that the 1, present invention realizes charge and discharge and monitoring alarm function by single-chip microcontroller, and with PLC come
Automation movement is handled, system setting is convenient, the scope of application is very wide；Not only exploitation be easy, but also if necessary at the scene into
Row upgrading also can be very convenient；
2, by the detection to storage capacitor voltage, cooperate control method of the invention, can either guarantee that capacitor prestissimo fills
Electricity, and can be avoided discharging thyristor and be not switched off and burn out current-limiting resistance, reduce equipment failure rate.
Detailed description of the invention
Fig. 1 is the circuit diagram of the energy storage of apparatus of the present invention and work of discharging；
Fig. 2 is the control principle block diagram of apparatus of the present invention.
Specific embodiment
As shown in Figure 1, the percussion welder control device of combination of embodiment of the present invention PLC includes importation and AC network
The rectification circuit 1 of connection, the on-off of rectification circuit is by silicon-controlled 2 control of charging；The output par, c of rectification circuit is separately connected storage
Energy capacitor 3 and welding transformer 4 constitute charge circuit and welding transformer circuit, are connected with control in welding transformer circuit
The discharging thyristor 5 of circuit on-off；Storage capacitor two sides are connected with the voltage acquisition module 6 for being able to detect storage capacitor voltage.
As shown in Fig. 2, the signal output end of the voltage acquisition module 6 is connected to one-chip computer module, one-chip computer module
Control instruction output par, c be separately connected for control charging silicon-controlled 2 and 3 on-off of discharging thyristor charging trigger circuit and
Discharge trigger circuit；One-chip computer module is also connected with a PLC module, and exchanges information with PLC module；PLC module connection is useful
To control the welding electrode driving cylinder control module of cylinder movement, the start button for inputting enabling signal and be used to
The human-computer interaction module of display and input operating parameter.
The percussion welder control method of the embodiment of the present invention is based on above-mentioned control device, comprising the following steps:
A. welding enabling signal is sent to one-chip computer module by PLC module, is controlled and is charged according to welding procedure by one-chip computer module
Circuit charge and discharge and the welding of welding transformer loop start；
B. one-chip computer module receives the 0 ~ 5V voltage transmitted by PLC module, and corresponding charging voltage is 0 ~ 400V, right accordingly
The voltage of storage capacitor is controlled；
It is more than that setting time charging is less than when c. charging, one-chip computer module exports charging under-voltage fault signal to PLC module；Charging
When storage capacitor voltage exceed setting range always, one-chip computer module exports charging overshoot fault-signal to PLC module；It gives twice
Discharge signal is given, storage capacitor voltage zero is but not detected, one-chip computer module exports discharge fault signal to PLC module；By
PLC module issues alarm signal by human-computer interaction module；
D. it in welding process, by PLC module according to welding procedure, is instructed to corresponding cylinder control module output cylinder movement,
Welding electrode is cooperated to complete welding movement.
Single-chip microcontroller acquires 3 both end voltage signal of storage capacitor during the charging process, by voltage acquisition module；When detecting
One-chip computer module triggering charging is silicon-controlled after storage capacitor both end voltage is 0V starts to charge, after the 50ms that charges, if at this time
50V is not achieved in storage capacitor voltage, then stops the 100ms that charges, repeatedly this process, until storage capacitor voltage is more than default electricity
Start to continue charging after pressure value, until storage capacitor is filled to the required operating voltage of welding.
Claims (7)
1. a kind of percussion welder control device of combination PLC, including the rectification circuit that importation is connect with AC network, rectification
The on-off of circuit is by charging SCR control；The output par, c of rectification circuit is separately connected storage capacitor and welding transformer, structure
At charge circuit and welding transformer circuit, welding transformer circuit is connected with the discharging thyristor of control loop on-off in；
It is characterized in that: the storage capacitor two sides are connected with the voltage acquisition module for being able to detect storage capacitor voltage；The voltage is adopted
The signal output end of collection module is connected to an one-chip computer module, and the control instruction output par, c of one-chip computer module is separately connected use
To control the charging trigger circuit and discharge trigger circuit of charge silicon-controlled and discharging thyristor on-off；One-chip computer module is also connected with
One PLC module, and information is exchanged with PLC module；The PLC module is connected with for controlling welding electrode driving cylinder movement
Cylinder control module.
2. the percussion welder control device of PLC is combined according to claim 1, it is characterized in that: PLC module connection is useful
To input the start button of enabling signal.
3. the percussion welder control device of PLC is combined according to claim 1, it is characterized in that: PLC module connection is useful
To show and input the human-computer interaction module of operating parameter.
4. a kind of percussion welder control method based on the percussion welder control device for combining PLC described in claim 1, feature
It is: includes the following steps,
A. welding enabling signal is sent to one-chip computer module by PLC module, is controlled and is charged according to welding procedure by one-chip computer module
Circuit charge and discharge and the welding of welding transformer loop start；
B. one-chip computer module receives the 0 ~ 5V voltage transmitted by PLC module, and corresponding charging voltage is 0 ~ 400V, right accordingly
The voltage of storage capacitor is controlled；
C. one-chip computer module by the signal that voltage acquisition module acquires judge storage capacitor occur charging under-voltage fault, charged
When rushing failure and discharge fault, corresponding failure signal is exported to PLC module, is issued by PLC module by human-computer interaction module
Alarm signal；
D. it in welding process, by PLC module according to welding procedure, is instructed to corresponding cylinder control module output cylinder movement,
Welding electrode is cooperated to complete welding movement.
5. percussion welder control method according to claim 4, it is characterized in that: in step c, when charging is more than setting time
It charges less than, one-chip computer module exports charging under-voltage fault signal to PLC module；Storage capacitor voltage, which exceeds always, when charging sets
Range is set, one-chip computer module exports charging overshoot fault-signal to PLC module；Discharge signal is given twice, and storage is but not detected
Energy capacitance voltage zero, one-chip computer module export discharge fault signal to PLC module.
6. percussion welder control method according to claim 4, it is characterized in that: single-chip microcontroller during the charging process, passes through electricity
Acquisition module is pressed to acquire storage capacitor both end voltage signal；Main control chip mould after detecting that storage capacitor both end voltage is 0V
Block triggering charging is silicon-controlled to be started to charge, after the charging duration that one sets that charges, if storage capacitor voltage is not achieved at this time
The preset voltage value of setting then stops the pause duration of one section of setting of charging, repeatedly this process, until storage capacitor voltage is super
It crosses preset voltage value to start to continue charging later, until storage capacitor is filled to the required operating voltage of welding.
7. percussion welder control method according to claim 6 presets electricity it is characterized in that: the charging duration is 50ms
Pressure value is 50V, when pause a length of 100ms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811496537.6A CN109317805A (en) | 2018-12-07 | 2018-12-07 | In conjunction with the percussion welder control device and control method of PLC |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811496537.6A CN109317805A (en) | 2018-12-07 | 2018-12-07 | In conjunction with the percussion welder control device and control method of PLC |
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| Publication Number | Publication Date |
|---|---|
| CN109317805A true CN109317805A (en) | 2019-02-12 |
Family
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| CN201811496537.6A Pending CN109317805A (en) | 2018-12-07 | 2018-12-07 | In conjunction with the percussion welder control device and control method of PLC |
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Citations (9)
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|---|---|---|---|---|
| JPH1015670A (en) * | 1996-07-03 | 1998-01-20 | Nippon Avionics Co Ltd | Method for compensating capacitor capacity in capacity type welding power source, and circuit therefor |
| CN2640684Y (en) * | 2003-08-26 | 2004-09-15 | 沈鸿亮 | High power welding equipment |
| CN101330228A (en) * | 2007-06-19 | 2008-12-24 | 广州（从化）亨龙机电制造实业有限公司 | Intelligent control inversion constant-power electricizing method |
| CN201313233Y (en) * | 2008-06-10 | 2009-09-23 | 深圳市比克电池有限公司 | Spot welder |
| CN102350581A (en) * | 2011-09-26 | 2012-02-15 | 广州（从化）亨龙机电制造实业有限公司 | Medium-voltage capacitive energy storage welding machine |
| CN203184820U (en) * | 2013-03-21 | 2013-09-11 | 罗博峰 | Spot welder with remote monitoring control system |
| CN206028994U (en) * | 2016-08-12 | 2017-03-22 | 广州毅翚金属加工机械有限公司 | Intermediate frequency contravariant spot welder |
| CN107008997A (en) * | 2017-06-08 | 2017-08-04 | 无锡海菲焊接设备有限公司 | High-voltage energy storage welding machine |
| CN107984068A (en) * | 2017-12-19 | 2018-05-04 | 东莞安达电机有限公司 | A kind of high-voltage energy storage resistance welder |
-
2018
- 2018-12-07 CN CN201811496537.6A patent/CN109317805A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1015670A (en) * | 1996-07-03 | 1998-01-20 | Nippon Avionics Co Ltd | Method for compensating capacitor capacity in capacity type welding power source, and circuit therefor |
| CN2640684Y (en) * | 2003-08-26 | 2004-09-15 | 沈鸿亮 | High power welding equipment |
| CN101330228A (en) * | 2007-06-19 | 2008-12-24 | 广州（从化）亨龙机电制造实业有限公司 | Intelligent control inversion constant-power electricizing method |
| CN201313233Y (en) * | 2008-06-10 | 2009-09-23 | 深圳市比克电池有限公司 | Spot welder |
| CN102350581A (en) * | 2011-09-26 | 2012-02-15 | 广州（从化）亨龙机电制造实业有限公司 | Medium-voltage capacitive energy storage welding machine |
| CN203184820U (en) * | 2013-03-21 | 2013-09-11 | 罗博峰 | Spot welder with remote monitoring control system |
| CN206028994U (en) * | 2016-08-12 | 2017-03-22 | 广州毅翚金属加工机械有限公司 | Intermediate frequency contravariant spot welder |
| CN107008997A (en) * | 2017-06-08 | 2017-08-04 | 无锡海菲焊接设备有限公司 | High-voltage energy storage welding machine |
| CN107984068A (en) * | 2017-12-19 | 2018-05-04 | 东莞安达电机有限公司 | A kind of high-voltage energy storage resistance welder |
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