Control System of CNC Metal Spinning Machine
Date: Apr,23 2020 View:
Control System of CNC Metal Spinning Machine
1.Overview
The numerical control of metal spinning machines began in the late 1960s. The full name of CNC metal spinning machine is digital program control metal spinning machine. Program control has two meanings: 1) the processing equipment execution mechanism moves in a certain order: 2) control the amount of movement of each action. The methods of program control are digital program control and non-digital program control. Non-digital program-controlled spinning machines, such as early manual spinning and hydraulic spinning machines, including various automatic and semi-automatic spinning machines for hydraulic profiling, which rely on adjusting the position, time and pressure relay and sequence etc. to achieve program control. The disadvantages of this kind of program-controlled spinning machine are: 1) various preparations and adjustments must be made in advance according to the processing requirements of parts, which will inevitably consume a lot of man-hours, processing and processing volume and cost. Therefore, this type of spinning machine is generally suitable for processing large quantities of products, so that the preparation of each part of the push, adjustment of working hours and costs are not economical. On the contrary, it is not cost-effective to process medium, small batches or a single complex product. 2) Since the iron block, limit switch, relay, sequence valve, etc., cannot indicate specific values to control the movement amount of various actions, the movement amount of each action is limited by the process, installation and measurement conditions, thus the processing accuracy of the product is limited.
Digital program control can not only automatically control the sequence of actions of various actuators, but also the movement amount of each action is given in the form of numbers, so the input accuracy of the movement amount is theoretically not limited by the process, and any size can be repeated display.
2. The advantages and disadvantages of CNC metal spinning machine
Generally speaking, CNC metal spinning machine can improve product accuracy, labor productivity, reduce processing cost and reduce labor intensity of workers. It is especially suitable for the processing of small and medium batches and complex parts. Specifically, it has the following advantages:
(1) The trajectory of the spinning roller is programmed into a program, which can be reviewed and intervened at any time, that is, it can be changed by computer keyboard input at any time until the end of the spinning process. The main basis of the design procedure is the processing conditions.
(2) The electronic monitor can monitor the spinning process, and the data obtained from the monitoring is immediately fed back to the CNC system, and the movement of the spinning roller is corrected immediately after the operation, so the product wall thickness can be obtained. The diameter, ovality and straightness are within the minimum tolerance. The surface quality of the workpiece is good, and the repeat accuracy is high. In most cases, there is no need for turning
(3) No need for profiling plates and profiling devices, which can save design and manufacturing time and related costs in this regard.
(4) Since the total production time is greatly shortened, the production cost is reduced. After adopting the numerical control system, the production efficiency of the equipment can generally be increased by 2 to 2.5 times.
(5) Complex and high-precision products can be formed and processed.
(6) Complete and advanced CNC metal spinning machine, with CAD / CAM drawing programming function, and with self-adaptive and self-diagnosis and display capabilities for failure. For example, the general spinning machine has the function of numerical control recording and teaching and becomes a spinning processing center for various forming processes.
(7) Before the machine is shut down, the program can be automatically stored on tape or disk for repeated use
(8) Due to the use of computer numerical control, it may be operated by workers who are not very skilled.
The disadvantages are that the equipment structure is complex and the cost is high; it is easy to fail when the component quality and assembly technology are not high; in the open-loop system, the stepper motor, hydraulic torque amplifier and equipment clearance, wear and ball screw accuracy requirements are high; in closed-loop systems, there are higher requirements for the accuracy of the feedback detection element, the stability of the hydraulic mechanism, and the symmetry, and the system debugging is more difficult.
With the development and application of electronic technology and computers, CNC automatic spinning machines have become the main development form of spinning machines.
3. This Prosper CNC metal spinning machines are controlled by Siemens multi- axis control system.
① Multi-Axes servo-control;
② Secondly development by Prosper CNC for Spinning functions;
③ Frequency speed control, constant speed function;
④ Working map show on monitor;
⑤ Simple, friendly and flexible in programming process.
⑥ Helical interpolation function
⑦ Mold/Mandrel machining functions.
