CN112077488A - Process equipment and control method and system for closed production line chamber body door - Google Patents
Process equipment and control method and system for closed production line chamber body door Download PDFInfo
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- CN112077488A CN112077488A CN202010848647.5A CN202010848647A CN112077488A CN 112077488 A CN112077488 A CN 112077488A CN 202010848647 A CN202010848647 A CN 202010848647A CN 112077488 A CN112077488 A CN 112077488A
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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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
Abstract
The invention provides a control method and a system for process equipment and a closed production line chamber body door, wherein the control method comprises the following steps: when the workpiece is required to be conveyed to the next procedure after the current procedure is completed, the transfer conveying equipment sends a door opening request signal to the production line control PLC, the production line control PLC receives the door opening request signal and then sends a door opening instruction signal to the door side PLC of the isolation door, and the door opening instruction is executed after the transfer conveying equipment is ready; after the workpieces are conveyed, the transfer conveying equipment sends a door closing request signal to the production line control PLC, the production line control PLC receives the door closing request signal and then sends a door closing instruction signal to the door side PLC of the isolation door, and the transfer conveying equipment executes a door opening instruction after returning to an initial position; the scheme provided by the invention can effectively realize the interlocking function of the process equipment and the closed production line chamber body door, and improve the safety and the control accuracy of the processing operation of the production line.
Description
Technical Field
The invention belongs to the technical field of control of production line chamber body doors, and particularly relates to a process device and a method and a system for controlling a closed production line chamber body door.
Background
Along with the continuous improvement of the automation degree in an automobile host factory, the application of various mechanical devices is increasingly wide. In order to meet the requirements of cooperative work of all devices and personal safety of operators, the interlocking program is added when each mechanized device is programmed to meet the requirements of related use and safe production. However, the production line in the existing host factory only sets an interlocking device and a program for production equipment generally, and the electric door of the production line chamber body is controlled by an independent program; the closed production line adopting such an interlocking manner has the following problems:
firstly, when the production beat or the process is adjusted, the opening and closing time interval of the electric door of the chamber body needs to be adjusted again, extra setting and debugging work is added, and absolute accurate matching cannot be achieved due to the fact that two sets of control programs of equipment and the electric door are mutually independent; when the opening and closing time interval is not accurately set, the constant-temperature and constant-humidity environment in the production line chamber body is damaged, and the energy consumption of an air conditioning system is increased;
secondly, when the production equipment breaks down, the electric door cannot monitor the abnormity of the production equipment, so that the door can collide with the fault conveying equipment and the vehicle body; safety devices such as safety gratings can be additionally arranged, so that collision accidents can be prevented only passively, and equipment purchasing cost needs to be additionally increased.
Based on the technical problems existing in the processing process of the automobile production line, no relevant solution is provided; there is therefore a pressing need to find effective solutions to the above problems.
Disclosure of Invention
The invention aims to provide a control method and a control system for process equipment and a closed production line chamber door aiming at overcoming the defects in the prior art and aims to solve the problem that the door bodies are linked with each other in the process of processing and transporting workpieces in the existing closed production line.
The invention provides a process equipment and a control method of a closed production line chamber body door, which specifically comprises the following processes:
s11: when the workpiece is required to be conveyed to the next procedure after the current procedure is completed, the transfer conveying equipment sends a door opening request signal to the production line control PLC, the production line control PLC receives the door opening request signal and then sends a door opening instruction signal to the door side PLC of the isolation door, and the door opening instruction is executed after the transfer conveying equipment is ready;
s12: after the workpieces are conveyed, the transfer conveying equipment sends a door closing request signal to the production line control PLC, the production line control PLC receives the door closing request signal and then sends a door closing instruction signal to the door side PLC of the isolation door, and the transfer conveying equipment returns to the initial position and then executes a door opening instruction.
Further, the isolation door of the production line is in an open state when the welding process is not performed, and the method further comprises the following processes:
s21: when the welding station is ready to start welding, the transfer conveying equipment PLC, the production line control PLC and the door side PLC are interlocked,
s22: after the transfer conveying equipment PLC is in place, sending a door closing request signal to the production line control PLC, and confirming a door closing instruction of the rear control door side PLC by the production line control PLC;
s23: after the welding is finished, the production line controls the PLC to control the PLC at the door side to execute a door opening instruction of the isolating door, and the workpieces are transported out by the transferring and conveying equipment.
Further, when the welding station carries out a welding process, the side doors on two sides of the chamber body are in a closed state, and the shielding doors in the chamber body are in an open state; the method also comprises the following steps:
s31: the outside of the side door receives the request entering signal and transmits the request entering signal to the production line control PLC;
s32: the production line control PLC receives the request entering signal and then sends an action stopping instruction to the welding grabbing equipment;
s33: after the welding grabbing equipment stops running, a stop confirmation signal is returned to the production line control PLC, and then an admission signal is sent to the side door PLC by the production line control PLC, at the moment, the shielding door descends in place, and the side door rises;
s34: after the workpiece conveying personnel finish withdrawing, the side door descends to the right position, and the shielding door rises.
Further, when the welding station performs welding work, the side doors on two sides of the chamber body are in a closed state; the method also comprises the following steps:
s41: the outside of the side door receives the maintenance signal and transmits the maintenance signal to the production line control PLC;
s42: the production line control PLC receives the maintenance signal and then sends an action stopping instruction to the welding grabbing equipment;
s43: after the welding grabbing equipment stops running, a stop confirmation signal is returned to the production line control PLC, and then an admission signal is sent to the side door PLC by the production line control PLC, so that the side door is lifted;
s44: after the maintainers finish the detection and exit from the side door, manually controlling the side door to descend; when the side door descends to the right position, a completion signal is returned to the production line control PLC, and the welding and grabbing equipment is started to resume running after the reset button is started.
Furthermore, the transfer conveying equipment is a skid, two electric sliding doors for sealing the chamber body are arranged at the working procedure station, and a door side PLC, an intermediate relay and a travel switch are respectively arranged on each electric sliding door;
in the process of transferring the workpiece by the aid of the sledges, the sledges slide into the lower portions of the workpiece, door opening request signals are sent to a production line control PLC after the working procedures of lifting the workpiece and opening the internal contracting brake are completed, the production line control PLC receives the door opening request signals and then sends door opening instruction signals to a door side PLC of the electric sliding door, and the door side PLC receives the door opening signals and then executes door opening operation of the electric sliding door by opening an intermediate relay; meanwhile, a travel switch is used for monitoring whether the electric sliding door slides in place;
after the door opening process of the electric sliding door is completed, the door side PLC of the electric sliding door feeds back a complete signal to the production line control PLC, the production line control PLC sends a door opening confirmation signal to the skid, and the skid is started to complete the operation process;
after the skid is transported, the skid backs and descends to an initial position, the band-type brake is closed, the skid sends a door closing request signal to the production line control PLC, the production line control PLC receives the door closing request signal and then sends a door closing instruction signal to the door side PLC of the electric sliding door, and the door side PLC of the electric sliding door receives the door closing instruction signal and then executes the door closing operation of the electric sliding door through a closing action intermediate relay; meanwhile, a travel switch is used for monitoring whether the electric sliding door is closed in place;
after the door closing process is finished, the door side PLC of the electric sliding door feeds back an in-place completion signal to the production line control PLC, the rollback program is completed, and the whole transferring-rollback program is finished.
Furthermore, the transfer conveying equipment is a skid, the working procedure station is provided with two isolating doors for sealing the chamber body, the two isolating doors are electric sliding doors, and each electric sliding door is respectively provided with a door side PLC, an intermediate relay and a travel switch;
s210: when a workpiece needing to be welded does not enter the welding chamber body, two electric sliding doors of the chamber body are in an opening state; when the skid slides into the lower part of the workpiece, after the working procedures of workpiece lifting and band-type brake opening are completed, the workpiece is transferred to a welding station, and a door closing request command is sent to a production line control PLC;
s220: the production line control PLC receives the door closing request signal and then sends a door closing instruction signal to the door side PLC of the electric sliding door, and the door side PLC of the electric sliding door receives the door closing instruction signal and then executes door closing operation of the electric sliding door through a closing action intermediate relay; meanwhile, a travel switch is used for monitoring whether the electric sliding door is closed in place;
s230: after the whole door closing action is finished, the door side PLC of the electric sliding door sends a finishing signal to the production line control PLC, the whole transfer program is finished, and the welding program is started to be executed;
s240: after the welding program is finished, the skid sends a welding completion signal to the production line control PLC, the production line control PLC receives the welding completion signal and then sends a door opening signal to the door side PLC of the electric sliding door, and the door side PLC receives the door opening signal and then executes the door opening operation of the electric sliding door by opening the intermediate relay; meanwhile, a travel switch is used for monitoring whether the electric sliding door slides in place;
s250: after the door is opened, the door side PLC sends a door opening completion signal to the production line control PLC, the production line control PLC controls the skid to complete transferring, and the program is finished.
Furthermore, the welding grabbing equipment comprises a grabbing robot and a welding robot, the grabbing robot and the welding robot are respectively in communication connection with the production line control PLC, and the side doors on two sides of the chamber body are lifting doors; in the welding process:
s310: personnel need to enter one side of the workpiece loading station and need to press a manual control switch on a side door to request an entry button, and after the button is pressed down, a door side PLC on a lifting door sends a door opening request signal to a production line control PLC;
s320: the production line control PLC sends a waiting signal to the workpiece grabbing robot after receiving the door opening request signal, the workpiece grabbing robot finishes current workpiece grabbing work and moves to a waiting area after receiving the waiting signal, the workpiece conveying station shielding door descends, and the travel switch monitors that the shielding door descends in place and sends an in-place signal to the production line control PLC;
s330: the production line control PLC sends a door opening signal to a door side PLC of the lifting door after receiving the completion signal, the lifting door rises, and the travel switch monitors whether the lifting door is opened in place;
s340: after the delivery is finished, the delivery personnel quit the chamber body, a door closing button of a manual control switch on the side door is pressed, a lifting door of a delivery station descends, a travel switch monitors that the lifting door descends in place, a door side PLC of the lifting door sends an in-place signal to a production line control PLC, the production line control PLC receives the in-place signal and sends a door opening signal to a shield door, and the shield door ascends;
s350: and after the travel switch monitors that the shielding door rises to the right position, sending a right-position signal to the production line control PLC, grabbing the robot to resume working, and finishing the workpiece conveying process.
Furthermore, the welding grabbing equipment comprises a grabbing robot and a welding robot, and the grabbing robot and the welding robot are respectively in communication connection with the production line control PLC; in the welding process:
s410: when a maintainer needs to enter a welding station for maintenance, a maintenance switch needs to be opened at a manual control switch of the side door, and a door side PLC of the side door sends a maintenance signal to a production line control PLC;
s420: the production line control PLC sends a stop instruction to the grabbing robot and the welding robot after receiving the maintenance signal, and sends a stop completion instruction to the production line control PLC after the grabbing robot and the welding robot stop;
s430: at the moment, the maintainer presses a door opening button, a door side PLC on a side door sends a door opening request signal to a production line control PLC, and the production line control PLC secondarily judges whether a welding grabbing equipment halt completion signal is received or not after receiving the door opening request signal; if the judgment result is yes, returning a door opening permission signal to the door side PLC for opening the door; if the judgment result is not yes, the permission signal is not returned;
s440: after the maintenance is finished, the maintenance personnel quit the chamber body, the maintenance switch at the position of the manual control switch of the switching door is in a non-maintenance state, the side door is lowered, after the side door is monitored by the travel switch to be lowered to the position, the door side PLC on the side door sends a lowering in-position signal to the production line control PLC;
s450: at the moment, the maintainer presses a reset button of a manual control switch of the door to grab the robot and restart the welding robot.
Further, the workpiece is a vehicle body; the control method is applied to an automobile welding production line.
Correspondingly, the invention also provides a control system of the process equipment and the closed production line chamber body door, which comprises welding grabbing equipment, transferring and conveying equipment and a production line control PLC; the welding grabbing equipment and the transferring and conveying equipment are respectively arranged in the production line sealed chamber body, the welding grabbing equipment is used for welding grabbing and welding the car body on the production line, and the transferring and conveying equipment is used for transferring the welded car body; the sealing chamber body is provided with side doors and a shielding door, each side door and the shielding door are respectively provided with a door side PLC, a travel switch and a door relay, and each door side PLC, the travel switch and the door relay are respectively in communication connection with the production line control PLC; and a manual control switch is also arranged on the outer side of the door side and is in communication connection with the production line control PLC.
By adopting the scheme, the interlocking logic of the door side PLC, the production line control line PLC and the manual control switch is designed, so that the door opening and closing time is completely completed by the program segment in sequence, compared with the traditional method of adding safety devices such as a grating and the like, the interlocking control method can be realized only by a PLC module of the equipment without adding excessive extra equipment, and the program can be adjusted according to the field process change at the later stage; the scheme provided by the invention can effectively realize the interlocking function of the process equipment and the closed production line chamber body door, and improve the safety and the control accuracy of the processing operation of the production line.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The invention will be further explained with reference to the drawings, in which:
FIG. 1 is a flow chart of a main wire-isolation gate interlock of the present invention;
FIG. 2 is a flow diagram of a main wire bonding process equipment-isolation gate interlock of the present invention;
FIG. 3 is a flow chart of the main wire bonding process equipment-side door interlock (top piece state) of the present invention;
FIG. 4 is a flow chart of the main wire bonding process equipment-side door interlock (overhaul state) of the present invention;
FIG. 5 is a plan view of the production line of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1, the present invention provides a control method for a process equipment and a closed production line chamber body door, which is particularly applicable to an automobile welding production line for welding and transferring control of a vehicle body workpiece; the control method comprises the following steps: the main welding line-isolation door interlocking mode specifically comprises the following processes:
s11: when the vehicle body is required to be conveyed to the next procedure after the current procedure is finished, the transfer conveying equipment sends a door opening request signal to the production line control PLC, the production line control PLC receives the door opening request signal and then sends a door opening instruction signal to the door side PLC of the isolation door, and the door opening instruction is executed after the transfer conveying equipment is ready;
s12: after the vehicle body finishes the conveying operation, the transfer conveying equipment sends a door closing request signal to the production line control PLC, the production line control PLC receives the door closing request signal and then sends a door closing instruction signal to the door side PLC of the isolation door, and the transfer conveying equipment executes a door opening instruction after returning to the initial position;
by adopting the scheme, the interlocking function is realized by utilizing the PLC and the door side PLC module in the existing production line, the side door in the chamber body can be opened and closed according to the process and production requirements, and the safety and the control precision in door opening and closing are improved.
Preferably, in combination with the above scheme, as shown in fig. 2, the control method specifically includes: main wire bonding process equipment-isolation gate interlock mode; the method specifically comprises the following steps: when the welding procedure is not executed, the isolation door on the production line is in an open state, and the method further comprises the following steps:
s21: when the welding station is ready to start welding, the transfer conveying equipment PLC, the production line control PLC and the door side PLC are interlocked, namely the transfer conveying equipment PLC, the production line control PLC and the door side PLC are communicated and interconnected, so that mutual control operation is performed;
s22: after the transfer conveying equipment PLC is in place, sending a door closing request signal to the production line control PLC, and confirming a door closing instruction of the rear control door side PLC by the production line control PLC;
s23: after the welding is finished, the production line controls the PLC to control the PLC at the door side to execute a door opening instruction of the isolation door, and the workpieces are transported out by the transfer conveying equipment;
by adopting the scheme, the interlocking function is realized by utilizing the PLC and the door side PLC module in the existing production line, the isolation door and the side door in the chamber body can be opened and closed according to the process and production requirements, and the safety and the control precision in door opening and closing are improved.
Preferably, in combination with the above scheme, as shown in fig. 3, the control method specifically further includes: a main wire bonding process equipment-side door interlocked piece feeding mode; when the welding station carries out a welding process, the side doors on two sides of the chamber body are in a closed state, and the shielding doors in the chamber body are in an open state; the method specifically comprises the following steps:
s31: the outside of the side door receives the request entering signal and transmits the request entering signal to the production line control PLC;
s32: the production line control PLC receives the request entering signal and then sends an action stopping instruction to the welding grabbing equipment;
s33: after the welding grabbing equipment stops running, a stop confirmation signal is returned to the production line control PLC, and then an admission signal is sent to the side door PLC by the production line control PLC, at the moment, the shielding door descends in place, and the side door rises;
s34: after the workpiece conveying personnel finish exiting, the side door descends to the right position, and the shielding door rises;
by adopting the scheme, the problem of mutual linkage of the door bodies in the process of machining and transporting workpieces on the existing closed production line can be effectively solved, the interlocking function is realized by utilizing the PLC and the door side PLC module in the existing production line, the shielding door and the side door in the chamber body can be opened and closed according to the process and production requirements, and the safety and the control precision in door opening and closing are improved.
Preferably, in combination with the above scheme, as shown in fig. 4, the control method specifically further includes: main welding line process equipment-side door interlocking maintenance mode; when the welding station performs welding work, the side doors on two sides of the chamber body are in a closed state; the method specifically comprises the following steps:
s41: the outside of the side door receives the maintenance signal and transmits the maintenance signal to the production line control PLC;
s42: the production line control PLC receives the maintenance signal and then sends an action stopping instruction to the welding grabbing equipment;
s43: after the welding grabbing equipment stops running, a stop confirmation signal is returned to the production line control PLC, and then an admission signal is sent to the side door PLC by the production line control PLC, so that the side door is lifted;
s44: after the maintainers finish the detection and exit from the side door, manually controlling the side door to descend; when the side door descends to the right position, returning a completion signal to the production line control PLC, and starting a reset button and then welding and grabbing equipment to resume running;
by adopting the scheme, the interlocking function is realized by utilizing the PLC and the door side PLC module in the existing production line, the side door in the chamber body can be opened and closed according to the process and production requirements, and the safety and the control precision in door opening and closing are improved.
Preferably, with reference to the above scheme, as shown in fig. 1, in this embodiment, the transfer conveyor includes a production line control PLC, the transfer conveyor is a skid, the process station is provided with two electric sliding doors used for closing the chamber body, and each electric sliding door is provided with a door side PLC, an intermediate relay and a set of travel switch; after the vehicle body from the station of the procedure before the next procedure is processed, the skid (IV) needs to execute a transferring-returning procedure, and the skid (IV) sends the vehicle body to the next station and returns to the initial position; the method specifically comprises the following steps:
in the process of transferring the vehicle body by the skid, the skid slides into the lower part of the vehicle body, after the vehicle body lifting and band-type brake opening processes are completed, a door opening request signal is sent to the production line control PLC, the production line control PLC receives the door opening request signal and then sends a door opening instruction signal to the door side PLC of the electric sliding door, and the door side PLC receives the door opening signal and then executes the door opening operation of the electric sliding door by opening an intermediate relay; meanwhile, a travel switch is used for monitoring whether the electric sliding door slides in place;
after the door opening process of the electric sliding door is completed, feeding back an in-place completion signal to a production line control PLC by a door side PLC of the electric sliding door, sending a door opening confirmation signal to a skid by the production line control PLC, and starting the skid to complete the operation process;
after the transfer of the skid is finished, the skid returns back and descends to an initial position, the band-type brake is closed, the skid sends a door closing request signal to the production line control PLC, the production line control PLC receives the door closing request signal and then sends a door closing command signal to the door side PLC of the electric sliding door, and the door side PLC of the electric sliding door receives the door closing command signal and then executes the door closing operation of the electric sliding door through a closing action intermediate relay; meanwhile, a travel switch is used for monitoring whether the electric sliding door is closed in place;
after the door closing process is finished, the door side PLC of the electric sliding door feeds back an in-place completion signal to the production line control PLC, the rollback program is finished, and the whole transferring-rollback program is finished.
Preferably, with reference to the above scheme, as shown in fig. 2, in this embodiment, the transfer conveying equipment is a skid, the process station is provided with two isolation doors for closing the chamber body, namely, a first electric sliding door and a second electric sliding door, and each electric sliding door is provided with a door side PLC (programmable logic controller), an intermediate relay (sixth relay) and a stroke switch (seventh switch);
s210: when the car body to be welded does not enter the welding chamber body, two electric sliding doors of the first door and the second door of the chamber body are in an opening state; when the skid fourth slides into the lower part of the vehicle body, after the vehicle body lifting and the contracting brake opening process are completed, the vehicle body is transferred to a welding station, and a door closing request command is sent to a production line control PLC (programmable logic controller);
s220: the production line control PLC sends a door closing command signal to the door side PLC (programmable logic controller) of the electric sliding door after receiving the door closing request signal, and the door side PLC of the electric sliding door executes the door closing operation of the electric sliding door through a closing action intermediate relay after receiving the door closing command signal; meanwhile, a travel switch is used for monitoring whether the electric sliding door is closed in place;
s230: after the whole door closing action is finished, the door side PLC of the electric sliding door sends a finished signal to the production line control PLC, the whole transfer program is finished, and the welding program is started to be executed;
s240: after the welding procedure is finished, the skid sends a welding completion signal to the production line control PLC, the production line control PLC receives the welding completion signal and sends a door opening signal to the door side PLC of the electric sliding door, and the door side PLC receives the door opening signal and then executes the door opening operation of the electric sliding door by opening an intermediate relay; meanwhile, a travel switch is used for monitoring whether the electric sliding door slides in place;
s250: after the door is opened, the door side PLC (programmable logic controller) sends a door opening completion signal to the production line control PLC (programmable logic controller), the production line control PLC controls the skid (PLC) to complete the transfer, and the process is finished.
Preferably, with reference to the above scheme, as shown in fig. 3, in this embodiment, the welding grabbing apparatus includes a grabbing robot and a welding robot ⑪, the grabbing robot and the welding robot ⑪ are respectively in communication connection with the production line control PLC, and the side doors on both sides of the chamber body are lift doors ((r) and (w)); specifically, the delivery person applies for entry: before executing the welding program, the grabbing robot (R) and the welding robot (⑪) communicate with the production line control PLC (programmable logic controller), confirm whether the side lifting doors (r) and (ninu) send signals for closing in place or not, and start welding if the signals for in place are determined to exist, specifically, in the welding process:
s310: personnel need to enter one side of the workpiece loading station and need to press a manual control switch ⑬ on the side door to request to enter a button, and after the button is pressed down, a door side PLC (programmable logic controller) on the lifting door sends a door opening request signal to a production line control PLC (programmable logic controller);
s320: the production line control PLC sends a waiting signal to the workpiece grabbing robot after receiving the door opening request signal, the workpiece grabbing robot finishes the current workpiece grabbing work and moves to a waiting area after receiving the waiting signal, the workpiece conveying station shielding door descends, and the stroke switch monitors that the shielding door descends in place and sends an in-place signal to the production line control PLC;
s330: the production line control PLC sends a door opening signal to a door side PLC of the lifting door after receiving the completion signal, the lifting door is lifted up and ninthly, and a travel switch monitors whether the lifting door is opened in place or not;
s340: after the workpiece is conveyed, a workpiece conveying person exits the chamber body, a door closing button of a manual control switch ⑬ on a side door is pressed, a lifting door (a) and a stroke switch (a) of a workpiece conveying station descend, a door side PLC (a) and a door side PLC (a) of the lifting door (a) and the stroke switch (a) monitor that the lifting door descends in place, sends in-place signals to a production line control PLC (a), the production line control PLC receives the in-place signals and sends door opening signals to a shielding door, and the shielding door ascends;
s350: and a travel switch is used for monitoring the shield door to ascend to the proper position and then sending a proper position signal to a production line control PLC, so that the grabbing robot recovers to work and the workpiece conveying process is finished.
Preferably, in combination with the above scheme, as shown in fig. 4, in this embodiment, specifically, welding grabbing device includes grabbing robot and welding robot ⑪, where grabbing robot and welding robot ⑪ are in communication connection with production line control PLC respectively; in the welding process:
s410: when a maintainer needs to enter a welding station for maintenance, a maintenance switch needs to be opened at a manual control switch ⑬ of the side door, and a door side PLC of the side door sends a maintenance signal to a production line control PLC;
s420: the production line control PLC sends a stop instruction to the grabbing robot and the welding robot after receiving the maintenance signal, and sends a stop completion instruction to the production line control PLC after the grabbing robot and the welding robot ⑪ stop;
s430: at the moment, a maintainer presses a door opening button, a door side PLC on a side door sends a door opening request signal to a production line control PLC, and the production line control PLC receives the door opening request signal and secondarily judges whether a welding grabbing equipment halt completion signal is received or not; if the judgment result is yes, returning a door opening permission signal to the door side PLC (programmable logic controller) to open the door; if the judgment result is not yes, the permission signal is not returned;
s440: after the maintenance is finished, a maintenance worker withdraws from the chamber body, a switching door manually controls a maintenance switch at the switch to be in a non-maintenance state, a side door is lowered, a stroke switch monitors that the side door is lowered in place, and a door side PLC on the side door sends a lowering in-place signal to a production line control PLC;
s450: at this time, the maintainer presses the reset button of door manual control switch ⑬ to restart the grabbing robot and welding robot ⑪.
Correspondingly, as shown in fig. 1 to 5, the invention also provides a control system of the process equipment and the closed production line chamber body door, which comprises welding grabbing equipment, transfer conveying equipment a and a production line control PLC; the welding grabbing equipment comprises a welding robot b; the welding grabbing equipment and the transferring and conveying equipment a are respectively arranged in the production line sealed chamber body, the welding grabbing equipment is used for welding grabbing and welding the car body on the production line, and the transferring and conveying equipment is used for transferring the welded car body; the sealing chamber body is provided with a side door c and a shielding door, each side door c and each shielding door d are respectively provided with a door side PLC, a travel switch and a door relay, and the shielding door d is an electric sliding door; each door side PLC, the travel switch and the door relay are respectively in communication connection with the production line control PLC; a manual control switch is also arranged on the outer side of the door side and is in communication connection with the production line control PLC; by adopting the connection design, the interlocking of the whole control system can be realized, the realization of the interlocking program is realized by means of the mutual communication between the production line control PLC and the door side PLC, the interlocking function is realized by utilizing the control PLC in the existing production line and the door side PLC module, the interlocking opening and closing functions of the isolation door and the side door in the room body can be realized according to the process and production requirements, and the safety and the control precision in the door opening and closing process are improved.
By adopting the scheme, the interlocking logic of the door side PLC, the production line control line PLC and the manual control switch is designed, so that the door opening and closing time is completely completed by the program segment in sequence, compared with the traditional method of adding safety devices such as a grating and the like, the interlocking control method can be realized only by a PLC module of the equipment without adding excessive extra equipment, and the program can be adjusted according to the field process change at the later stage; the scheme provided by the invention can effectively realize the interlocking function of the process equipment and the closed production line chamber body door, and improve the safety and the control accuracy of the processing operation of the production line.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Those skilled in the art can make numerous possible variations and modifications to the described embodiments, or modify equivalent embodiments, without departing from the scope of the invention. Therefore, any modification, equivalent change and modification made to the above embodiments according to the technology of the present invention are within the protection scope of the present invention, unless the content of the technical solution of the present invention is departed from.
Claims (10)
1. A control method for process equipment and a closed production line chamber body door is characterized by comprising the following steps:
s11: when the workpiece is required to be conveyed to the next procedure after the current procedure is completed, the transfer conveying equipment sends a door opening request signal to the production line control PLC, the production line control PLC receives the door opening request signal and then sends a door opening instruction signal to the door side PLC of the isolation door, and the door opening instruction is executed after the transfer conveying equipment is ready;
s12: after the workpieces are conveyed, the transfer conveying equipment sends a door closing request signal to the production line control PLC, the production line control PLC receives the door closing request signal and then sends a door closing instruction signal to the door side PLC of the isolation door, and the transfer conveying equipment returns to the initial position and then executes a door opening instruction.
2. The method for controlling a process equipment and a door of a closed type production line chamber according to claim 1, wherein the isolation door of the production line is in an open state when the welding process is not performed, further comprising the steps of:
s21: when the welding station is ready to start welding, the transfer conveying equipment PLC, the production line control PLC and the door side PLC are interlocked,
s22: after the transfer conveying equipment PLC is in place, sending a door closing request signal to the production line control PLC, and confirming a door closing instruction of the rear control door side PLC by the production line control PLC;
s23: after the welding is finished, the production line controls the PLC to control the PLC at the door side to execute a door opening instruction of the isolating door, and the workpieces are transported out by the transferring and conveying equipment.
3. The process equipment and the control method for the closed production line chamber body door according to claim 1, wherein when the welding station performs the welding process, the side doors on two sides of the chamber body are in a closed state, and the shielding door in the chamber body is in an open state; the method also comprises the following steps:
s31: the outside of the side door receives the request entering signal and transmits the request entering signal to the production line control PLC;
s32: the production line control PLC receives the request entering signal and then sends an action stopping instruction to the welding grabbing equipment;
s33: after the welding grabbing equipment stops running, a stop confirmation signal is returned to the production line control PLC, and then an admission signal is sent to the side door PLC by the production line control PLC, at the moment, the shielding door descends in place, and the side door rises;
s34: after the workpiece conveying personnel finish withdrawing, the side door descends to the right position, and the shielding door rises.
4. The process equipment and the control method of the chamber body door of the closed production line according to claim 1, wherein when the welding station performs welding work, the side doors on two sides of the chamber body are in a closed state; the method also comprises the following steps:
s41: the outside of the side door receives the maintenance signal and transmits the maintenance signal to the production line control PLC;
s42: the production line control PLC receives the maintenance signal and then sends an action stopping instruction to the welding grabbing equipment;
s43: after the welding grabbing equipment stops running, a stop confirmation signal is returned to the production line control PLC, and then an admission signal is sent to the side door PLC by the production line control PLC, so that the side door is lifted;
s44: after the maintainers finish the detection and exit from the side door, manually controlling the side door to descend; when the side door descends to the right position, a completion signal is returned to the production line control PLC, and the welding and grabbing equipment is started to resume running after the reset button is started.
5. The process equipment and the control method of the closed production line chamber body door according to claim 1, wherein the transfer conveying equipment is a skid, two electric sliding doors for closing the chamber body are arranged at a working station, and each electric sliding door is respectively provided with a door side PLC, an intermediate relay and a travel switch;
in the process of transferring the workpiece by the aid of the sledges, the sledges slide into the lower portions of the workpiece, door opening request signals are sent to a production line control PLC after the working procedures of lifting the workpiece and opening the internal contracting brake are completed, the production line control PLC receives the door opening request signals and then sends door opening instruction signals to a door side PLC of the electric sliding door, and the door side PLC receives the door opening signals and then executes door opening operation of the electric sliding door by opening an intermediate relay; meanwhile, a travel switch is used for monitoring whether the electric sliding door slides in place;
after the door opening process of the electric sliding door is completed, the door side PLC of the electric sliding door feeds back a complete signal to the production line control PLC, the production line control PLC sends a door opening confirmation signal to the skid, and the skid is started to complete the operation process;
after the skid is transported, the skid backs and descends to an initial position, the band-type brake is closed, the skid sends a door closing request signal to the production line control PLC, the production line control PLC receives the door closing request signal and then sends a door closing instruction signal to the door side PLC of the electric sliding door, and the door side PLC of the electric sliding door receives the door closing instruction signal and then executes the door closing operation of the electric sliding door through a closing action intermediate relay; meanwhile, a travel switch is used for monitoring whether the electric sliding door is closed in place;
after the door closing process is finished, the door side PLC of the electric sliding door feeds back an in-place completion signal to the production line control PLC, the rollback program is completed, and the whole transferring-rollback program is finished.
6. The process equipment and the control method of the closed production line chamber body door according to claim 2, wherein the transfer conveying equipment is a skid, two isolating doors for closing the chamber body are arranged at the working station and are electric sliding doors, and each electric sliding door is respectively provided with a door side PLC, an intermediate relay and a travel switch;
s210: when a workpiece needing to be welded does not enter the welding chamber body, two electric sliding doors of the chamber body are in an opening state; when the skid slides into the lower part of the workpiece, after the working procedures of workpiece lifting and band-type brake opening are completed, the workpiece is transferred to a welding station, and a door closing request command is sent to a production line control PLC;
s220: the production line control PLC receives the door closing request signal and then sends a door closing instruction signal to the door side PLC of the electric sliding door, and the door side PLC of the electric sliding door receives the door closing instruction signal and then executes door closing operation of the electric sliding door through a closing action intermediate relay; meanwhile, a travel switch is used for monitoring whether the electric sliding door is closed in place;
s230: after the whole door closing action is finished, the door side PLC of the electric sliding door sends a finishing signal to the production line control PLC, the whole transfer program is finished, and the welding program is started to be executed;
s240: after the welding program is finished, the skid sends a welding completion signal to the production line control PLC, the production line control PLC receives the welding completion signal and then sends a door opening signal to the door side PLC of the electric sliding door, and the door side PLC receives the door opening signal and then executes the door opening operation of the electric sliding door by opening the intermediate relay; meanwhile, a travel switch is used for monitoring whether the electric sliding door slides in place;
s250: after the door is opened, the door side PLC sends a door opening completion signal to the production line control PLC, the production line control PLC controls the skid to complete transferring, and the program is finished.
7. The control method of the process equipment and the closed production line chamber body door according to claim 3, characterized in that the welding grabbing equipment comprises a grabbing robot and a welding robot, the grabbing robot and the welding robot are respectively in communication connection with the production line control PLC, and the side doors on two sides of the chamber body are lifting doors; in the welding process:
s310: personnel need to enter one side of the workpiece loading station and need to press a manual control switch on a side door to request an entry button, and after the button is pressed down, a door side PLC on a lifting door sends a door opening request signal to a production line control PLC;
s320: the production line control PLC sends a waiting signal to the workpiece grabbing robot after receiving the door opening request signal, the workpiece grabbing robot finishes current workpiece grabbing work and moves to a waiting area after receiving the waiting signal, the workpiece conveying station shielding door descends, and the travel switch monitors that the shielding door descends in place and sends an in-place signal to the production line control PLC;
s330: the production line control PLC sends a door opening signal to a door side PLC of the lifting door after receiving the completion signal, the lifting door rises, and the travel switch monitors whether the lifting door is opened in place;
s340: after the delivery is finished, the delivery personnel quit the chamber body, a door closing button of a manual control switch on the side door is pressed, a lifting door of a delivery station descends, a travel switch monitors that the lifting door descends in place, a door side PLC of the lifting door sends an in-place signal to a production line control PLC, the production line control PLC receives the in-place signal and sends a door opening signal to a shield door, and the shield door ascends;
s350: and after the travel switch monitors that the shielding door rises to the right position, sending a right-position signal to the production line control PLC, grabbing the robot to resume working, and finishing the workpiece conveying process.
8. The control method of the process equipment and the closed production line chamber body door according to claim 4, wherein the welding grabbing equipment comprises a grabbing robot and a welding robot, and the grabbing robot and the welding robot are respectively in communication connection with the production line control PLC; in the welding process:
s410: when a maintainer needs to enter a welding station for maintenance, a maintenance switch needs to be opened at a manual control switch of the side door, and a door side PLC of the side door sends a maintenance signal to a production line control PLC;
s420: the production line control PLC sends a stop instruction to the grabbing robot and the welding robot after receiving the maintenance signal, and sends a stop completion instruction to the production line control PLC after the grabbing robot and the welding robot stop;
s430: at the moment, the maintainer presses a door opening button, a door side PLC on a side door sends a door opening request signal to a production line control PLC, and the production line control PLC secondarily judges whether a welding grabbing equipment halt completion signal is received or not after receiving the door opening request signal; if the judgment result is yes, returning a door opening permission signal to the door side PLC for opening the door; if the judgment result is not yes, the permission signal is not returned;
s440: after the maintenance is finished, the maintenance personnel quit the chamber body, the maintenance switch at the position of the manual control switch of the switching door is in a non-maintenance state, the side door is lowered, after the side door is monitored by the travel switch to be lowered to the position, the door side PLC on the side door sends a lowering in-position signal to the production line control PLC;
s450: at the moment, the maintainer presses a reset button of a manual control switch of the door to grab the robot and restart the welding robot.
9. The process equipment and the control method of the closed production line chamber body door according to any one of claims 1 to 8, wherein the workpiece is a vehicle body; the control method is applied to an automobile welding production line.
10. A control system for process equipment and a closed production line chamber body door is characterized by comprising welding grabbing equipment, transferring and conveying equipment and a production line control PLC; the welding grabbing equipment and the transferring and conveying equipment are respectively arranged in a sealed chamber of the production line, the welding grabbing equipment is used for welding grabbing and welding the car body on the production line, and the transferring and conveying equipment is used for transferring the welded car body; the sealing chamber body is provided with side doors and a shielding door, each side door and the shielding door are respectively provided with a door side PLC, a travel switch and a door relay, and each door side PLC, the travel switch and the door relay are respectively in communication connection with the production line control PLC; and a manual control switch is further arranged on the outer side of the door side and is in communication connection with the production line control PLC.
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