Controller of personal computer of seam welding machine of capacitance energy storage is developed

2 document label piles up: A article number: 1001 - 2303(2000)01 - 0027 - Yong Et Al(Northwestern Polytechnical University)Abstract of 　 of 03Development On Microcomputer Controllerfor Condenser Discharge Seam WelderZHANG: A Microcomputer Controller For Condenser Discharge Seamwelder Is Introduced In This Paper.

The Controlling Principle, hardware Structure, software Flowchart And Some Specialities Of Controller Are Also Discussed.

Key Words: Miniature of 　 of ▲ of Condenser Discharge Seam Welding;microcomputer Control;design resistance welding join has important place in small join technology, of confidential letter of spirit of wh some of which solder to often use method of point of resistance of capacitance energy storage, seam welding. Because of miniature geometrical size is small, heat heat of the analyse in the process is little and medicinal powder heat is intense, the distributinging characteristic of field of weld zone temperature is gradient of temperature of direction of edge weldment ply very small, the effect that heats centrally is hard to form on joint face, and use method of resistance welding of capacitance energy storage to be able to be solved well heat rapid, concentration, weldment is out of shape quality of small, connect is advanced problem. But at present these solder a few inadequacy still exist on methodological control, lag behind quite on the application that controls a technology especially, even some welder still basically are using canal of valve, ignition to be control parts of an apparatus, affect the specifications of welder and technical properties badly. Article introduction uses personal computer and brilliant brake canal to give priority to the development of the controller of seam welding machine of capacitance energy storage that controls parts of an apparatus. Because 1 control principle solders miniature what need total power lesser, use power supply of single-phase power source so. Among classics of single-phase power source after transformer step up, again via charging dc of output of switch of brilliant brake canal sheds capacitor group to undertake energy storage, charge voltage can choose according to the requirement. Of the energy of capacitor of lay aside existence release provide switch control by discharge brilliant brake. The enlightened hour that discharge brilliant brake runs criterion by sheet piece engine control, once canal of discharge brilliant brake is enlightened, criterion the electric field in capacitor group can regard keep in storage as power source, change through switch and progression receive implement wait to discharge quickly to winding of discharge of block solder transformer, be in of sub side solder the capacitance energy storage that loop midstream crosses an induction to go out solders electric current. Because discharge pulse is lesser, need not consider to add outfit polarity commutator in 2 loop, the electric field of capacitance keep in storage can Wc expression is: (The C in 1) type is capacitor group capacity, affect the amplitude of pulse of discharge electric current and width; Uc is charge voltage, basically affect the amplitude of pulse of discharge electric current. On control, control only charge half Zhou Bo regards energy storage as the sources of energy, brilliant brake canal sparks horn moves photograph limits is 90 ° ～ 135 ° , move section width to be 45 ° namely, should charge brilliant brake canal sparks when horn is 90 ° , be worth charge the peak dot of voltage weaveform, charge so voltage is the biggest, it is right now when other condition is changeless, solder energy is the biggest. When brilliant brake the canal sparks when horn is 135 ° , charge tension is the least, solder energy also is the smallest. The basis solders of the product different, adjust charge accordingly voltage value, can get what contented and different technology asks to solder standard. Control charges the adjustment of voltage by sheet piece machine implementation, charge according to what man-machine interface inputs voltage set value, cipher out of personal computer plan moves accordingly photo corner, undertake timing by CTC tally, set time arrives to be given out namely charge accordingly brilliant brake canal sparks pulse. In addition, controller controls weld time to reach even cut off the power time, the seam welding machine of small-power capacitance energy storage with general now place is like QZ-170 seam welding machine, used 4 class to divide method of frequency of archives adjustment pulse, because the reason on workmanship is reached on the technology, should refine rigid control to connect further cut off the power time comparing is not quite easy. In system of personal computer control, control make-break time comes true more easily. Connect in this control cut off the power time comparing inputs set by man-machine interface, adjusting range is 1: 1 to 1: 49 wait for 49 class, raised the specifications of original welder greatly. 2 control construction of system controls a system by sheet piece personal computer is given priority to charge unit, with brilliant brake the canal gives priority to component of switch of electric power circuit, use single-phase fill, canal of discharge brilliant brake, the control construction of system of welder is shown 1 times like the graph. Graph block diagram of 1 control construction of system 2.

Converter of 1 　 A/D installs the action of A/D converter to have 2: It is sampling discharge electric current solders namely voltaic peak value, this is parameter of one of solder of capacitance energy storage vital technology. Another it is voltage of sampling electrified wire netting, according to wave motion of electrified wire netting OK and corresponding change charges brilliant brake canal moves photo corner, assure to solder the stability that voltage charges in the process. A/D converter uses 0809 chip, s of μ of sampling speed 100 is controlled. 2.

What collateral interface chooses 2 collateral interface is 8255 chip, action is to pass data information. If the information of man-machine interface is deferent, input set information content, show metrical ginseng numerical value to wait. Additional the input of personal computer itself / output mouth also is used to the I/O mouth that regards control as the system, the information that deferent data switch measures, call the police information. 2.

3 timer timer is used odd the CTC timer that 8031 itself place takes a chance, odd a machine advocate frequency is 6 MHz. The action of timer is the service of functional work out that is software; Another be to fill, discharge brilliant brake is in charge of move to time; Still having is the peak value horn that is metric discharge pulse TM(or call electric current undee gradient) with discharge pulse width T(or call discharge time) of the service, TM and T are solder of capacitance energy storage medium additional two important parameter. 2.

4 call the police circuit controls a system to soldering the process undertakes be diagnosticed oneself, have when be not whack, indicate in order to call the police beforehand namely, show corresponding wrong message, stop to solder of the process move. Call the police information has the following kinds: "Press too " -- charge the highest voltage that voltage sets more than; "Out of control " -- blame solder when the process, fill, canal of discharge brilliant brake is enlightened already, solder loop has electricity; "Be illogical report " -- when soldering, fill, canal of discharge brilliant brake does not work, solder loop does not have electric current. In addition, control system used special screen, light to lie between, the measure such as the protection that drop report, make the system has taller stability and reliability. The software flow of system of 3 software flow control is shown 2 times like the graph. Software work out is used modular structure, it is each other noninterference, clear to revise easy, arrangement, can expand force is powerful. Graph flow chart of 2 main programs 4 controller characteristic 4.

1 solder to TM of gradient of weaveform of IM of peak value of process parameter electric current, electric current and discharge time T can put store and show, solder to control quality, establish craft standard extremely significant. 4.

2 use computer control to charge voltage presses wave motion to give according to the net correction compensation, improved the control performance of welder greatly, can accomplish more accurate heat parameter control. 4.

Process of 3 pairs of seam welding uses the computer the make-break time that the method of metric and synchronous pulse dominates seam welding set up an electric circuit is compared, the craft that enlarged active and general welder uses range, be opposite especially accurate miniature solder have effect. 4.

Controller of personal computer of 4 capacitance energy storage deserves to use small size (F of 500 μ is the following) when capacitor group, can satisfy miniature well the craft need of seam welding. Controller software is made a bit alter, can deserve to use machine of spot welding of capacitance energy storage. 5 conclusion 5.

The miniature of 1 development seam welding of capacitance energy storage is odd an idea of machine controller design is correct, reasonable. 5.

2 use sheet piece engine control charges voltage and seam welding make-break time are compared, raised the specifications of welder greatly. 5.

3 controller are had solder the parameter such as electric current, weld time shows, to solder the control of quality provided a basis. 5.

4 controller have diagnose oneself, call the police wait for a variety of functions, dependability is good, have stronger applied background, it is advanced the production technology success application in solder. CNC Milling CNC Machining