CN112045291A - Spot welding machine pressure value control method and system and spot welding machine - Google Patents
Spot welding machine pressure value control method and system and spot welding machine Download PDFInfo
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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
- B23K11/10—Spot welding; Stitch welding
- B23K11/11—Spot welding
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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
- B23K11/25—Monitoring devices
- B23K11/252—Monitoring devices using digital means
- B23K11/255—Monitoring devices using digital means the measured parameter being a force
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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
- B23K11/30—Features relating to electrodes
- B23K11/3009—Pressure electrodes
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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
- B23K11/36—Auxiliary equipment
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Abstract
The invention belongs to the technical field of spot welder control, and discloses a spot welder pressure value control method, a spot welder pressure value control system and a spot welder.A scale/digital display pressure gauge is arranged at an air inlet and an air outlet of an air cylinder to monitor the pressure value information of the air inlet and the air outlet of the air cylinder during operation; and the intelligent control system is linked with a PLC (programmable logic controller), and the intelligent control system can automatically control the foolproof parameters of the air cylinder pressure in the standardized and visual operation of spot welding pressure values. The invention designs an air inlet pressure value meter and an air outlet pressure value meter which are used for controlling the output pressure F of the pneumatic cylinder, and can be visually observed and transparently managed. The design sets a technological parameter standard of the exhaust pressure value of the cylinder, and staff can control the process parameter standard according to the standard and visually select the technological air pressure value. When the device works, when the designed air pressure value table with the signal transmission function is not in the range of the 'technological parameter standard', the air pressure value table is associated with a PLC program of the device, can automatically alarm, is self-locked, is not allowed to operate, and achieves the purposes of foolproof and mistake proofing.
Description
Technical Field
The invention belongs to the technical field of spot welding machine control, and particularly relates to a spot welding machine pressure value control method, a spot welding machine pressure value control system and a spot welding machine.
Background
At present, the processing of sheet metal stamping components/sheets requires spot welding (spot welding, which is a welding method that uses columnar upper and lower electrodes to compress two workpieces by pressure, and quickly passes through a certain welding current and welding time to form a welding spot between contact surfaces of overlapped workpieces.
The spot welding is mainly used for welding sheet component stamping parts with the thickness of less than 4MM, is particularly suitable for parts of air conditioner metal plates and automobile bodies, but cannot be welded with containers with sealing requirements), and is applied to industries of air conditioners, automobiles and the like in a large scale; three common parameters for spot welding are: spot welding current, spot welding time, upper and lower electrode cylinder pressure (cylinder pressure is an important step of compressing a workpiece in a spot welding process, and is also an important process parameter influencing welding quality, when the pressure value is lower, a welding connection point cannot be formed due to the fact that the workpiece cannot be compressed, so that a 'false weld' is formed, and when the pressure value is higher, the welded thickness of a base metal is damaged, so that the strength is lower than the design requirement); when a real production unit is manufactured, the air cylinder pressure value is in a generalized process range (the existing spot welding equipment air pressure process standard only meets the use requirement and cannot accurately define the correlation range of the air cylinder pressure value), and not for the management and control of the air cylinder pressure F output (the pressure F output actually is used for debugging an air cylinder exhaust port pressure flow valve, no definition standard exists in reality), the production management and control only needs the skill mastered by staff, and a sensory pressure value is debugged by 'experience', so that the problem that due to insufficient skill (especially for new staff), the debugging pressure value is small during operation, welding 'rosin joint' (rosin joint), which is a fault and quality defect of welding quality, is that an effective welding connection point is not formed during workpiece welding, the connection strength cannot meet the product design requirement, and has great quality hidden danger), and further quality abnormity occurs, the control of the production process is not facilitated, and the quality control cost of enterprises is increased.
Through the above analysis, the problems and defects of the prior art are as follows:
(1) in the existing air-conditioning industry, spot welding operation is manually operated by 'experience', and meanwhile, no effective control means is provided for solving the abnormity caused by the fact that the pressure value does not meet the requirement.
(2) In the prior art spot welding operation, the quality control capability is poor, and the quality cost of enterprises is high.
The significance of solving the problems and the defects is as follows:
in order to solve 'empiric' and stabilize the quality of product production process control, a cylinder air inlet and an air outlet scale/digital display pressure gauge are additionally arranged, and a device capable of monitoring the air outlet pressure value information function of the cylinder during operation is linked with a PLC program, so that spot welding pressure value standardization is realized, visual operation is realized, and automatic fool-proof parameter intelligent control method of cylinder pressure is realized.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a spot welding machine pressure value control method, a spot welding machine pressure value control system and a spot welding machine.
The invention realizes the standardization of the technological parameters of the pressure value of the cylinder by adding the intelligent pressure gauge with the signal transmission function, and creates a brand-new intelligent automatic control method for spot welding operation by combining with a PLC program.
When the intelligent control system works, the air inlet of the air cylinder enters a standard pressure value, the air outlet monitors the air pressure flow pressure value, and the system can output the judgment whether the standard range of the pressure value meets the requirement within 1 second at the moment, so that the intelligent control is completed.
The invention is realized in such a way that a spot welding machine pressure value control method comprises the following steps:
monitoring pressure value information of the air inlet and the air outlet of the air cylinder during operation through a scale/digital display pressure gauge arranged at the air inlet and the air outlet of the air cylinder;
and the intelligent control system is linked with a PLC (programmable logic controller), and the intelligent control system can automatically control the foolproof parameters of the air cylinder pressure in the standardized and visual operation of spot welding pressure values.
Further, when the spot welding machine works, the air inlet of the air cylinder enters a standard pressure value, the air outlet monitors the air pressure flow pressure value, and whether the standard range of the output pressure value meets the requirement or not is judged within 1 second through a PLC program;
the standardized formulation method of the spot welding pressure value comprises the following steps: and verifying pressure information output by the air inlet pressure gauge of the air cylinder and the air outlet pressure gauge of the air cylinder to obtain the minimum value and the maximum value of the technological parameters of the air pressure value of the air outlet of the air cylinder.
Further, the spot welder pressure value control method specifically comprises the following steps:
step one, treading a pedal plate in a standby state, and transmitting detected pressure values to a PLC system by a pressure gauge with signal control functions at an air inlet of an air cylinder and an air outlet of the air cylinder;
step two, the PLC system judges whether the pressure of the exhaust port meets the requirement or not and outputs a control signal;
step three, the control signal is Y, the foolproof alarm device lights the green light, the equipment works once, and the step one is continued; and (4) the control signal is N, the fool-proof alarm device lights a red light, the self-locking reset button of the system automatically locks the equipment, and the first step is continued after the system is reset.
Further, the spot welder pressure value control method further comprises the following steps:
1) when the spot welding machine does not work, the exhaust port of the air cylinder passes through the technological parameters of 0.4MPA air pressure, the air inlet of the air cylinder is not ventilated, and the stroke of the air cylinder is at the top end;
2) when the spot welding machine works, the air inlet of the air cylinder is communicated with the technological parameter of 0.4Mpa, and the air outlet is not communicated with the air;
3) the obstruction degree of the flow pressure value of the exhaust port control valve determines the magnitude of the output pressure F of the air cylinder, and when the opening of the exhaust port control valve is maximum and the obstruction of the flow air pressure value is 0Mpa, the output pressure F of the air cylinder reaches the maximum;
when the exhaust port control valve is adjusted to the gauge air pressure value XMpa, the spot welding quality requirement is met, the technological parameter standard is less than or equal to X Mpa, and the minimum pressure value F is output by the cylinder.
Another object of the present invention is to provide a spot welder pressure value control system, including:
the pressure gauge is used for acquiring and outputting pressure information;
the PLC system is used as a control center and establishes a process standard by verifying pressure information collected by the pressure gauge; during operation, judging whether pressure information acquired by a pressure gauge meets requirements or not, and outputting a control signal;
the fool-proof alarm device alarms when receiving the abnormal signal output by the PLC system;
and the system self-locking reset button is used for self-locking the equipment when receiving the abnormal signal output by the PLC system.
Further, the pressure gauge comprises an air cylinder air inlet pressure gauge and an air cylinder air outlet pressure gauge with a signal control function.
It is a further object of the invention to provide a computer arrangement comprising a memory and a processor, the memory storing a computer program which, when executed by the processor, causes the processor to carry out the method.
It is a further object of the invention to provide a computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, causes the processor to carry out the method.
It is a further object of the present invention to provide a computer PLC program product stored on a computer readable medium, comprising a computer readable program for providing a user input interface for implementing the method when executed on an electronic device.
Another object of the invention is to provide a spot welder for carrying out said method.
By combining all the technical schemes, the invention has the advantages and positive effects that:
the invention designs an air inlet pressure value meter and an air outlet pressure value meter which are used for controlling the output pressure F of the pneumatic cylinder, and can be visually observed and transparently managed.
The design sets a technological parameter standard of the exhaust pressure value of the cylinder, and staff can control the process parameter standard according to the standard and visually select the technological air pressure value.
When the device works, when the designed air pressure value table with the signal transmission function is not in the range of the 'technological parameter standard', the air pressure value table is associated with a PLC program of the device, can automatically alarm, is self-locked, is not allowed to operate, and achieves the purposes of foolproof and mistake proofing.
The control method adopts a PLC (programmable logic controller) system as a control center for controlling the actions of some electrical components, a process standard is formulated for the exhaust pressure value output and controlled by the control cylinder pressure F, and during operation, the exhaust pressure gauge signal sensor inputs information whether to meet the requirements to the PLC system for judgment, so that the pressure value standardization and intelligent abnormal fool-proofing control are realized.
Due to the standardization of the technological parameters of the air pressure value and the intelligent application of the monitoring pressure signal output function, the quality abnormity caused by insufficient air cylinder output pressure F can be solved from the source of the spot-welded sheet metal part, meanwhile, the requirement of 'air cylinder pressure' of one of three parameters of spot welding can be mastered more visually, and a technological quality basis is provided for the management and control of the production process.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained from the drawings without creative efforts.
Fig. 1 is a flow chart of a pressure value control method for a spot welding machine according to an embodiment of the present invention.
Fig. 2 is a flow chart of a pressure value control method of a spot welding machine according to an embodiment of the invention.
Fig. 3 is a control logic diagram of a spot welding machine pressure value parameter standardized intelligent control PLC provided in the embodiment of the present invention.
Fig. 4 is a diagram illustrating the effect of adjusting the pressure output regulating valve according to experience in the prior art before the improvement provided by the embodiment of the present invention.
Fig. 5 is an improved embodiment of the present invention: and (4) standardizing pressure value parameters and intelligently controlling an effect graph.
Fig. 6 is a diagram illustrating an alarm effect of the foolproof alarm device after improvement according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Aiming at the problems in the prior art, the invention provides a pressure value control method and a pressure value control system of a spot welding machine, and the invention is described in detail with reference to the accompanying drawings.
As shown in fig. 1, the present invention provides a method for controlling a pressure value of a spot welding machine, comprising:
s101, treading a pedal plate in a standby state, and transmitting detected pressure values to a PLC system by a pressure gauge with an air inlet pressure gauge and an air outlet signal control function of the air cylinder.
S102, the PLC system judges whether the pressure of the exhaust port meets the requirement or not and outputs a control signal.
S103, when the control signal is Y, the fool-proof alarm device lights a green light, the equipment works once, and the step S101 is continued; the control signal is N, the fool-proof alarm device lights a red light, the self-locking reset button of the system automatically locks the equipment, and the step S101 is continued after the system is reset.
The invention further provides a spot welder pressure value control system, which comprises:
and the pressure gauge is used for acquiring and outputting pressure information.
The PLC system is used as a control center and establishes a process standard by verifying pressure information collected by the pressure gauge; and during operation, judging whether the pressure information acquired by the pressure gauge meets the requirement or not, and outputting a control signal.
And the fool-proof alarm device alarms when receiving the abnormal signal output by the PLC system.
And the system self-locking reset button is used for self-locking the equipment when receiving the abnormal signal output by the PLC system.
The pressure gauge comprises a cylinder air inlet pressure gauge and a pressure gauge with a cylinder air outlet signal control function.
The invention is further described with reference to specific examples.
Examples
As shown in fig. 2, the cylinder pressure value output is controlled by the degree of obstruction of the cylinder exhaust port valve pressure value, and the operation principle is as follows:
1) when the air cylinder is not in operation, the air outlet of the air cylinder passes through the technological parameters of 0.4MPA air pressure, the air inlet of the air cylinder is not ventilated (the air pressure value is 0Mpa), and the stroke of the air cylinder is at the top.
2) When spot welding works, the air inlet of the air cylinder is communicated with 0.4Mpa air pressure technological parameters, and the air outlet is not communicated with air (at the moment, the air pressure value of the air outlet is decompressed by 0.4 Mpa).
3) The degree of obstruction of the flow pressure value of the exhaust port control valve at this time determines the magnitude of the cylinder output pressure F, namely: when the gas vent control valve opened the biggest, its flow atmospheric pressure value hinders when being 0Mpa, cylinder output pressure F reaches the biggest (summarize for cylinder gas vent control flow valve ↓, then table atmospheric pressure value ↓hindersexhaust pressure ↓, output pressure F ≠ when the gas vent control valve adjusted table atmospheric pressure value "X" Mpa, satisfy spot welding quality requirement, the minimum pressure value F that just can ensure cylinder output of "X" Mpa must be ≦ to the technological parameter standard this moment, the same reason, gas vent atmospheric pressure value "Y" Mpa (Y is less than X value) is the biggest pressure value of cylinder pressure output F, consequently it is the important means of management and control cylinder pressure F output to define this gas vent atmospheric pressure value "technological standard".
The air pressure value data process parameters do not represent a unique standard, are not specially used as a process standard, and actually change according to the specification of the equipment model.
In the invention, a spot welding machine pressure value parameter standardization and intelligent control method comprises the following steps:
as introduced by the cylinder principle, in order to realize F intelligent control of pressure output, a pressure gauge (with scales/digital display) at an air inlet of the cylinder and a pressure gauge with a signal control function at an air outlet of the cylinder are required to be added to the spot welding machine;
and (4) establishing the minimum value and the maximum value of the technological parameter of the air pressure value of the air outlet of the air cylinder through pressure output verification, wherein the technological parameter is established as a technological standard.
In order to realize intelligence and informatization automatic control, an alarm device and a system self-locking reset button are required to be added.
After the transformation of the device is completed, a PLC program is designed, and finally, the standardized intelligent automatic control of the spot welding pressure value parameters is realized.
Fig. 3 is a control logic diagram of a spot welder pressure value parameter standardization intelligent control PLC provided in an embodiment of the present invention, where in fig. 3:
x000 represents a cylinder air pressure exhaust pressure value table detection signal.
X002 represents the foot pedal activation message.
X003 represents a reset button indicating the release signal alarm.
M0 stands for "Power on" indicating information acquisition, and/slash flag is normally closed.
Y001 represents an output alarm signal, indicating an abnormal signal output.
M8013 stands for special auxiliary relay for time pulse
Y000 is assisted by M0.
Y000 is on, M0 is off; y000 off, M0 on.
The spot welding machine pressure value control method provided by the embodiment of the invention comprises the following steps:
firstly, stepping once X002 to get power, outputting M0 to get power synchronously, and cutting off Y000;
when the X000 is judged to be qualified, conducting to obtain power, obtaining the Y000 power, simultaneously self-locking, and finishing the first step of normal operation;
when the X000 judges that the unqualified signal is input, the M0 (normally closed) in the 0 column is not electrified, the state is off, the Y000 (normally closed) in the 7 column is electrified, the T1 signal is conducted after 1 second, and the T1 conducting signal is obtained from the 11 column of signals, so that the alarm is given.
Finally, resetting X003 to get electricity, Y000 to get electricity, turning on green light, ending alarm and returning to the first step.
Fig. 4 before improvement: and (4) adjusting the effect diagram of the pressure output pressure regulating valve by experience.
FIG. 5 after the improvement of the present invention: the pressure value parameter standardization and intelligent control effect graph is provided with an intelligent pressure gauge with a transmission function pressure flow signal and a pressure flow control valve.
FIG. 6 is a diagram showing the effect of alarm by the foolproof alarm device after improvement.
In the description of the present invention, "a plurality" means two or more unless otherwise specified;
the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear"),
The orientations and positional relationships indicated by the "head", "tail", and the like are based on the orientations and positional relationships shown in the drawings and are only for convenience in describing the present invention and for simplification of description, but do not indicate or imply that the indicated devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus are not to be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and not for purposes of limitation
Relative importance can be understood as being indicated or implied.
It should be noted that the embodiments of the present invention can be realized by hardware, software, or a combination of software and hardware. The hardware portion may be implemented using dedicated logic; the software portions may be stored in a memory and executed by a suitable instruction execution system, such as a microprocessor or specially designed hardware. Those skilled in the art will appreciate that the apparatus and methods described above may be implemented using computer executable instructions and/or embodied in processor control code, such code being provided on a carrier medium such as a disk, CD-or DVD-ROM, programmable memory such as read only memory (firmware), or a data carrier such as an optical or electronic signal carrier, for example. The apparatus and its modules of the present invention may be implemented by hardware circuits such as very large scale integrated circuits or gate arrays, semiconductors such as logic chips, transistors, or programmable hardware devices such as field programmable gate arrays, programmable logic devices, etc., or by software executed by various types of processors, or by a combination of hardware circuits and software, e.g., firmware.
The above description is only for the purpose of illustrating the present invention and the appended claims are not to be construed as limiting the scope of the invention, which is intended to cover all modifications, equivalents and improvements that are within the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A spot welding machine pressure value control method is characterized by comprising the following steps:
monitoring pressure value information of the air inlet and the air outlet of the air cylinder during operation through a scale/digital display pressure gauge arranged at the air inlet and the air outlet of the air cylinder;
and the intelligent control system is linked with a PLC (programmable logic controller), and the intelligent control system can automatically control the foolproof parameters of the air cylinder pressure in the standardized and visual operation of spot welding pressure values.
2. The spot welding machine pressure value control method according to claim 1, characterized in that when the spot welding machine is working, the air inlet of the air cylinder enters a standard pressure value, the air outlet monitors the air pressure flow pressure value, and whether the standard range of the output pressure value meets the requirement is judged by the PLC program within 1 second;
the standardized formulation method of the spot welding pressure value comprises the following steps: and verifying pressure information output by the air inlet pressure gauge of the air cylinder and the air outlet pressure gauge of the air cylinder to obtain the minimum value and the maximum value of the technological parameters of the air pressure value of the air outlet of the air cylinder.
3. The spot welder pressure value control method according to claim 1, characterized in that the spot welder pressure value control method specifically comprises:
step one, treading a pedal plate in a standby state, and transmitting detected pressure values to a PLC system by a pressure gauge with signal control functions at an air inlet of an air cylinder and an air outlet of the air cylinder;
step two, the PLC system judges whether the pressure of the exhaust port meets the requirement or not and outputs a control signal;
step three, the control signal is Y, the foolproof alarm device lights the green light, the equipment works once, and the step one is continued; and (4) the control signal is N, the fool-proof alarm device lights a red light, the self-locking reset button of the system automatically locks the equipment, and the first step is continued after the system is reset.
4. The spot welder pressure value control method according to claim 1, further comprising:
1) when the spot welding machine does not work, the exhaust port of the air cylinder passes through the technological parameters of 0.4MPA air pressure, the air inlet of the air cylinder is not ventilated, and the stroke of the air cylinder is at the top end;
2) when the spot welding machine works, the air inlet of the air cylinder is communicated with the technological parameter of 0.4Mpa, and the air outlet is not communicated with the air;
3) the obstruction degree of the flow pressure value of the exhaust port control valve determines the magnitude of the output pressure F of the air cylinder, and when the opening of the exhaust port control valve is maximum and the obstruction of the flow air pressure value is 0Mpa, the output pressure F of the air cylinder reaches the maximum;
when the exhaust port control valve is adjusted to the gauge air pressure value XMpa, the spot welding quality requirement is met, the technological parameter standard is less than or equal to X Mpa, and the minimum pressure value F is output by the cylinder.
5. A spot welder pressure value control system, characterized in that spot welder control system includes:
the pressure gauge is used for acquiring and outputting pressure information;
the PLC system is used as a control center and establishes a process standard by verifying pressure information collected by the pressure gauge; during operation, judging whether pressure information acquired by a pressure gauge meets requirements or not, and outputting a control signal;
the fool-proof alarm device alarms when receiving the abnormal signal output by the PLC system;
and the system self-locking reset button is used for self-locking the equipment when receiving the abnormal signal output by the PLC system.
6. The spot welder pressure value control system according to claim 5, wherein said pressure gauges include a cylinder inlet pressure gauge and a cylinder outlet pressure gauge with signal control function.
7. A computer arrangement, characterized in that the computer arrangement comprises a memory and a processor, the memory storing a computer program which, when executed by the processor, causes the processor to carry out the method of any one of claims 1-4.
8. A computer-readable storage medium, storing a computer program which, when executed by a processor, causes the processor to perform the method of any one of claims 1-4.
9. A computer PLC program product stored on a computer readable medium, comprising a computer readable program for providing a user input interface for implementing the method of any of claims 1-4 when executed on an electronic device.
10. A spot welder for carrying out the method according to any one of claims 1 to 4.
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| JP2003130008A (en) * | 2001-10-26 | 2003-05-08 | Smc Corp | High speed driving method and its apparatus for pressure cylinder |
| JP2003305573A (en) * | 2002-04-11 | 2003-10-28 | Chuo Seisakusho Ltd | Pressure device for electric resistance welding machine |
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