a11-20 type a deep neck mainly include the machine body, the slider, clutch, a brake, and manipulator parts.It was based on the crank connecting rod as the working mechanism, its action principle to see.Crank rod system is rigid, so the movement of the sliding block is mandatory, slider stroke times per minute and the movement of the sliding block solid go curve is the same.This belongs to general press sheet stamping press, suitable for all kinds of cold stamping process, such as shear, punching, blanking, bending and line drawing, etc., due to deep throat and mouth, and is suitable for cars, electronics, electrical, instrumentation and other industries of large sheet punching and blanking, the punching line drawing, etc.
normal processing, automatic transfer switch SW1 in the state, when to start processing, CNC unit ENC issue instructions, 1 or absorption, contactor KM1, turning on the power supply main contact closure, main motor begins to spin.Need stamping king 3 – issued instructions, intermediate relay and 3, KA and subsequently, electromagnetic clutch YA, turning on the power supply voltage block action, start parts processing.Need to stop the NC instruction.0, 2, disconnect KM1 and KA, main motor electromagnetic clutch YA M and power at the same time.0, 1, 2, 3, intermediate relay by nc programming and control, both in parallel the fly-wheel diode, prevent reverse high voltage power relay instantaneous burn out ENC nc unit.
(3) hybrid stepping motor feed system) to the transmission part of the reform is deep neck press into dismantling the original machine mechanical transmission mechanism, using stepper motor by gear reducer drive screw, drive the workpiece longitudinal and lateral movement.Such as shown below, the longitudinal feed the X axis drive, stepper motor 3 fixed on the chassis, after 2 drive screw drive gearbox artifacts longitudinal movement.Y drive the transverse feed is directly driven by stepping motor 1 screw, thereby giving impetus to the lateral movement of the workpiece.Longitudinal feed the retarding mechanism, can achieve the required pulse equivalent, it can also meet the requirements of structure and increase torque.
Yu 4 feed system structure schematic Yu 1 – Y axis stepper motor gearbox;3 – the X axis stepper motor;4 – bed;5 – workbench) choose Germany BERGERLAHR berger lahr company production of three-phase hybrid stepping motor and its drive to apply principle of ac servo stepper motor system.The stepper motor absorb the advantages of the two and five phase motor drive adopts ac servo motor drive with works, the motor system completely solve the traditional stepping motor at low speed crawl, a large resonance region, the sound, and high-speed torque and small faults, therefore is called with the working characteristic of the ac servo motor stepper motor system.
reference stepper motor drive control principle diagram, the AC380V power through to isolate and step-down transformer TB become AC220V power for the stepper motor drive voltage until L, N, CP + nc unit, CCW + output pulse control drive WD3-007 output pulse and the direction of the output, U, V, W to stepping motor winding Angle of connection.Drive and stepper motor side PE requires reliable grounding.
Yu 6 step motor winding connection and the current waveform Yu, as shown in the reference and berger lahr company applying principle of ac servo motor drives to the stepper motor drives, input AC220V after rectification generate DC325V meridians width modulation into 325 v stepped sinusoidal current waveform, each step motor rotation step, by changing the output current of the drive frequency to change the motor speed, and output the number of steps walked motor turning Angle.As shown in flow through each phase winding current is stepped sinusoidal current, ladder with sinusoidal current drive, makes every step motor to corresponding current change is very small, so you don’t produce low speed crawl, resonance, the undesirable phenomena, such as sound big operating characteristics are almost the same as ac servo motor.In only three power line between motor and drive, with the possibility of ac asynchronous motor as attachment error less.Drive circuit board adopted anti-corrosion treatment, overheating, over-voltage, under-voltage, motor phase short circuit and over current protection function.Drive has a half flow set of functions, when the stepper motor, please press your subscription electromechanical journal bookmark1 = 2002 self-issued, on application will send order.Address: Shanghai day key bridge road no. 1, zip code 200030, telephone (021 charged static after 100, the drive output current automatically to the forehead the output current of 60, used to prevent motor fever.
in three-phase hybrid stepping motor drive system in actual production application, fully showed a high precision, fast response speed, torque, small electric heating, no resonance region and a series of advantages.
(4) stop limit protection Yu (stop spacing and safety protection devices such as ENC – nc unit; SB6 – stop button; SB5 – start button; SB4 – distance release button; S01, S02, S03, S04 – the X axis and Y axis to limit switch; ZCZ – work briquetting test switch 1) numerical control system is equipped with soft and hard limit protection. Soft limit alarm is by setting the machine tool’s axis within the machine tool coordinate system moving coordinate values of minimum and maximum to hsu, within the region known as the working area wash limit set in the interior of the hard limit. Hard limit protection trip limit is hsu by travel switch, trip switch immediately once they are under pressure to cut off the feed drive power supply, and inform the CNC system to produce distance alarm.)If the abnormal situation in the machining process, press the stop button SB6 would immediately cut off all drive power supply, emergency stop, troubleshooting, must be removed artificially stop, and may continue to work.)ZCXZCY is a deep neck presses the working point of ZCZ for briquetting test device, through programming and electromagnetic clutch used YA now complex graphics processing.
3 epilogue after numerical control transformation of deep neck press, main advantage is: the system is flexible and reliable.With input information storage capacity, can be commonly used disposable input processing program memory, call at any time, the numerical control unit by using the computer as control unit less hardware, the system failure rate of components is reduced, so as to improve the reliability.
control system software, easy to expand, strong adaptability.As long as change program can different parts processing, can carry out the processing complex design.
have self-diagnosis ability, easy maintenance.The system has diagnostic program, you can easily find out fault type and less downtime.
program editor is convenient.In the field can increase, delete and modify the debugger, also may carry on the programming simulation running on the computer, communication way transmitted to numerical control unit.
can realize fully automated processing.Only good clip board processing in the processing, on the machine press the start button, the rest of the machining process can realize full automation, greatly reduces the operating workers labor intensity is popular among the workers.
can achieve safety protection.If anyone goes in the process of machining processing area, numerical control system can automatically cut off the power and implement security protection, ensure the safety of production.
save money.Compared to purchase new CNC deep neck press can save a large sum of money.
control principle is complex, the maintenance personnel knowledgeable, beginning ability is stronger.
need to be highly familiar with programming and operation personnel and trained.
engineering college of electrical engineering, Shanghai jiaotong university robotics institute visiting scholar, published over 20 papers.
;Editor: Yao Ke)