Ac servo system in cold bending forming wire racks application
Shelves of cold bending forming light steel keel of cold bending machine rollerball slippery course door cold bending machine, cold bending machine C/Z purline cold bending machine wave pattern color tile cold bending machine doors of cold bending forming harmonious door switch of cold bending plate garage door clamp hand against the cold bending machine cable tray car payments cold bending waves surging into the cold bending machine type hulan welded pipe
Ac servo system in cold bending forming wire racks application
Abstract: according to the company the cold bending forming wire racks of ac servo control system of the technical characteristics and product technology request, unifies mitsubishi series and servo motor servo drive, and analyzed the practical application system to solve the length of control design thinking and control principle. Practical application in the control accuracy ¡À 0.1 mm highest around and can avoid the accumulative error, can achieve a goal and the position control precision requirements.
Keywords: ac servo system fixed-length control position control
1 and introduction
In the column of cold bending 1.1 shelves in the production line imported punch forming process and advance technology, hydraulic stop cutting has expanded the cross-section shape shelf pillar design range and accuracy, and satisfy the manufacture steel structural system design and shelves for assembling, greatly optimized structure steel shelves, especially when the mechanism of three-dimensional warehouse system in our country and the comprehensive development of the hole position precision rack column, the length of control etc. To put forward higher request.
Article 120 the shelves of imported cold bending forming column using ac servo control principle of production of punching and realize hydraulic stop cutting control device analysis, to realize the cold bending in many occasions to a higher position precision control and requirement, and the same field.
2 the cold bending forming wire racks, principle of work
The cold bending forming wire racks 2.1 production process and equipment:
The general 2.1.1 shelves components production process for: open-book - leveling, servo feeding punching - forming rolling -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- cut set foot straightening pack - later spraying processing,
2.1.2 corresponding equipment for: the uncoiler, leveling machine feeding device -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- presses servo cold bending rolling unit -- - hydraulic cutting device straightening head and hydraulic pressure station - packer or other ancillary equipment + electric control system, etc.
The cold bending forming wire racks 2.2 ac servo control system of basic principles:
As shown in figure 1.
This system consists of five 2.3 parts, namely, the computer, the servo drive control card and ac servo control system, sensing detection and feedback, auxiliary active system. Master program in only A few hundred K, running under the DOS, master computer through LP1 port and print servo driver control card, and through the data sent position or speed regulation or instruction, adaptive PID parameters Settings, and after see drawings, through the corresponding analog-to-digital conversion control board output ¡À 10V analog signals by ac servo amplifier amplification and servo motor drive, after half closed loop or closedloop position control feedback system by motor shaft with the incremental light signals to provide complete code disc position servo system, the position feedback position feedback loop sensing elements - solid-axes photoelectric encoder will motion component of displacement variation in real-time A and B phase difference pulse form long-term transmission to the control station in encoder pulse count, for digital information is given, the master computer calculation with actual position deviation position, according to the error range corresponding PID control strategy, digital control effect by digital-to-analog into analog output voltage, and control servo amplifiers, final adjustment to the expectations, motor sports repeatedly close-loop feedback control principle, control in location on the small error precision positioning, Then master program execution system of active assisted instruction issued, the specific operation dlectrical action, press machine, hydraulic press movement stop cutting off movement, etc.
The main characteristics of the 2.4: one-time investment cost is higher, the biggest ac servo power to have certain restriction, but later, especially low operating cost is high yield components of a shelf, high precision, wide application range, high additional value.
3, automatic feeder and punching device analysis and working principle
The cold bending forming 3.1 rack column of punching production processes automatic feeding device and a pair of 75 by conducting roll composition, main motivation comes from ac servo motor, rely on board and conducting roll the friction between the feeding, shelves column in the pressure distribution on the strip hole punch, as shown in figure 2, the main design for American device design of powerleader 3.7 KW servo control system, after the new product development, increase the work load, and according to the transmission of figure 2 shows the work principle, namely the dynamic control and communication between the position servo control mainly through ¡À 10V to realize the analog signals, does not exist for ac servo system of power restriction, can be in principle for the replacement of mitsubishi Japan servo amplifiers model J2S - series of MR - a 5KW supporting the ac servo controller and ac servo motor, and according to the component of racking manufacturing precision requirements and determine the servo control accuracy ¡À 0.1mm: by measuring roll circumference and measuring precision scope of approximately: 1178 ratio, appropriate chooses 1200PPR above revolving encoder and almost four years later in the application process can well realize location accuracy control requirements.
3.2 mitsubishi MR - J2 servo system has a good stability, low responsiveness machines, including mechanical system, the optimum condition as well as the characteristics of adjustment, The frequency response speed 550HZ reach above, very suitable for high-speed positioning, is suitable for load inertia and toughness will increase than poorer equipment.
3.3 automatic feeding device is shown by the graph three main structure, photoelectric sensor (# 1 main feedback into the press the working area, such as steel strip existing conditions of excess material:; etc. (2) servo motor gear box down by conducting roll relay transmission power, gearbox ratio I and motor speed determines the speed feeding positioning system, 3 revolving encoder measure on conducting roll through the metal motion transfer between the location signal 4.more mechanical dlectrical realize localization of fixed position, 5 the photoelectric sensor press # 2 realization of location signal work control requirements of the relay, [6] mould of realizing the stamping
