Chip gap automatic compensation function. According to the inherent characteristics of the mechanical part of this type of shearing machine, in order to ensure that the absolute position between the rear baffle and the lower cutting edge does not change during the blade clearance adjustment process, the machine has a change with the cutting edge clearance, and automatically The function of compensating the material to achieve the absolute positioning accuracy of the back gauge.
The overall concept of electrical design is conceived in the following stages in the design phase of the electrical control plan. (1) Considering the history and experience of the shearing machine produced by our factory, the main part still adopts the QC12Y-6@3200 ordinary model. At the same time, the high-precision transmission pair such as ball screw and ball linear guide is used in the mechanical transmission part of the back gauge. In addition to the unique mechanical adjustment mechanism, the automatic adjustment mechanism of the gap uses a large torque, low speed motor and high precision linear sensor. To improve the gap control accuracy.
(2) DNC-10G (or DAC-35O) is the world's most advanced NC system for shearing machines. According to the width, length, thickness and material of the input sheet, the running distance of the back gauge, the blade gap size, the cutter frame shear width and other parameters can be automatically calculated and automatically controlled. After the NC completes its control, it issues a cut permission command and gives control to the next level PLC control.
(3) For the weakness that NC can not specifically control the tool holder and the supporting material, we use OMRON's C40PPLC to fully control the hydraulic system of the tool holder and the supporting material. At the same time, some position signals of the tool holder are transmitted to the NC through the PLC to realize the coordinated and uniform working between the functional components under the overall control of the NC. At the same time, considering the debugging and user's operating habits, the PLC can easily realize the conversion between the manual mode and the NC control mode.
Electrical system design (1) Electrical system frame: 1x axis AC digital servo control; the analog control signal is sent by the NC, and the AC servo motor is driven by the amplifier. The axis control parameters can be set by the soft parameters in the NC. The position loop position feedback is realized by a pulse encoder.
Finally, semi-closed loop position control is realized. The blade gap and tool holder shear width detection is detected by a linear sensor, and the position analog signal is fed back to the NC for simple position closed loop control. The hydraulic movement of the tool holder is controlled by the PLC, and at the same time accepts and transmits the main control signal from the main components such as the button and the stroke switch.
(2) I/O interface between NC and PLC Electrical performance and matching Because of the necessary communication between NC and PLC, the matching of electrical performance between the two is particularly important. NCI/O electrical performance, logic input: 24VDC, 10mAmax optical isolation, logic output: 24VDC, 500mAmax triode. PLCI / O electrical performance, input: 24VDC, 10%; 7mA optical isolation, output: 250VAC / 24V, DC, 2A relay. The electrical performance between the NC and the PLC is matched. In the NC and PLCI/O interface connection, the output signal of the NC is connected to the input of the PLC.
When the NC has an output, Ie=(24V-0.7)/3K=7.8mA>7mA, which fully meets the requirements of the PLC for the input signal, and the shielded cable is connected between the NC and the PLC to improve the anti-interference ability of the system and increase the work. reliability.
The working sequence of the whole machine and the PLC trapezoid (1) In the normal working state, all the actions of the machine tool are coordinated and commanded by the NC. The timing of the action is as shown.
Machine tool action timing (2) In the PLC ladder design, the PLC's rich auxiliary relay function is utilized, and two special commands, IL (interlock) and ILC (clear interlock), are used to design different modularization according to different operation requirements of the machine tool. The program, now in the single-time numerical control case, select the feeding mode as an example, giving a partial trapezoid.
Conclusion Through several years of production and feedback information during the user's use, it can be seen that the electrical system runs smoothly and the failure rate is low during the use of the machine. It has been put into the small batch production stage.
(Finish)
Our robots are specialized in Metal press lines, through automatically feeding ,discharging the hardward products to reach all lines automation, saving the labour and avoid the industry injury.
It is specially used in the metal drawing line include soak drawing-liquid and feeding & dicharging from punch press.
Both processing procedures not suit manual operation due to liquid harmful and punch press is dangerous operating.
Stainless Steel Hardware Drawing robot
Metal drawing robot,Stainless steel drawing robot,Drawing robot
Shantou Jiesheng Robot Technology Co. Ltd. , http://www.stjsrobot.com