CNC and automation use Siemens 840D numerical control system to transform the vertical car Harbin Steam Turbine Works Co., Ltd. (150000) Xia Jihong CNC equipment operation for ten years will appear CNC system aging, system operation box I qualitative poor and high failure rate, solve this problem There are two ways to solve a problem: one is equipment update; the other is equipment transformation. As far as the mechanical part of the machine tool is concerned, its life span is more than 30 years, and its numerical control part is generally 10 to 15 years old. If the machine tool is updated due to its numerical control system problem, it is not an option according to the current national conditions of China. Equipment transformation, so that the old equipment re-stable operation is an effective method.

The Siemens 800 series CNC system has been widely used in this respect. Our company has modified a Romanian 2.2m vertical car by using the Siemens 840D CNC system and the 611D drive to re-run the machine that has been discontinued for two years.

The Siemens 840D system and the 611D drive are a practical CNC system introduced by Siemens in the early 1990s. It mainly has the following characteristics: The system is a compact CNC numerical control device suitable for machine tools such as car, milling, boring, drilling, etc. The modular design of each part of the device is convenient for design and maintenance. The basic power unit is available in single and dual shaft sizes. The PLC part adopts Siemens built-in CPU314 program control system, which has strong versatility. The programming language adopts S7 with automatic, manual, MDA and other production methods, and can be equipped with handwheel and handheld unit. On the measuring circuit, there is continuous safety detection function, with wheel monitoring and spindle monitoring.

The system can work in multiple tasks at the same time, shortening the auxiliary time of the machining task. The feed and rapid movement can be changed from 0.lnun/min to 999m/min, and smooth acceleration is performed, which can perform various cutting functions and spindle positioning. Features. These properties ensure a good surface roughness even in high-speed feed conditions.

The system is compatible with a variety of advanced programming languages ​​using the DIN66025 programmer. It has excellent human-machine dialogue and graphics functions, can be graphically assisted, and can be graphically simulated for test procedures. It has absolute/incremental Programming function.

The system uses RS232C/TTY interface and has integrated data backup function. Communication uses network communication. The network integrates NCK, machine control panel and NC to make data transmission between them faster and more reliable. The system has a Chinese interface and is more suitable for domestic use. The system has a hard disk and a floppy drive with a Dong, which is more convenient for data backup.

Our company wants to transform a CNC-made vertical car made in Romania. The power of the disk motor is 60kW, the torque is 400Nm; the rated speed is 12000r/min, and the maximum speed is 4500r/min. The feed shaft is equipped with two motors, the torque is 20Nm, the rated speed is 3000r/min, and the input is idle. The point is 40 points and the output point is 20 points, all of which are digital output. The maximum current is 0.3A. According to the above conditions, we make the following modifications: According to the model of the original spindle motor, we choose Siemens-0AA1, the motor torque is 1250r. /min, the last speed is 5000r/min, the rated current is 117A. According to the model of the original feed motor, we choose 1FT6086 1AH1, the motor torque is 22 4Nm, the rated speed is 3000r/min, with the electric brake, the rated current is 18A. According to the rated current of the spindle motor, the power module we selected is: According to the rated current of the feed axis motor, the module we selected is: Calculated by all the power blocks by coefficient, the selected power module is: 202A, and Match the corresponding reactor and filter device.

Block 48 points, 16DO/DV24 output block 2 blocks 32 points.

Drive and operation panel, MMC select 103. Third, basic connection diagram power supply device 840D numerical control device spindle drive device X, Z axis dual-axis drive assembly 1 reactor machine tool keyboard hand wheel PLC device spindle motor X-axis motor Z-axis motor Filter display - operating keyboard power supply four, basic debugging steps 藿 Siam S3, S4 knobs to the first 姑 ;; set the user's different user memory area size; define the machine's system mainly: position control Time factor, interpolation time, system unit. Configure the machine axis.

The number of channels defining the machine tool is mainly: configuration of the wanted axis for machine programming.

The configuration defined in the machine driver package is mainly used to define various feedback addresses and power module addresses, as well as the power module's accommodation and axis property definition.

Defining the specific axes of each servo axis is mainly used to define the number and logic number of each servo axis measurement system, the type of encoder, the mechanical ratio of the measuring device to the lead screw, the rules of the measuring system, the speed parameters of the servo axis, and Parameters, monitoring parameters, etc.

Select the motor to select the corresponding servo motor through the FDD and MSD menus for system optimization.

Write the corresponding PLC program and report it.

Power on the unit.

The length of the feed glaze was checked with a laser interferometer and compensated.

Through this transformation, the machine's CNC system and the drive unit's fuse rate are significantly reduced, and the reliability of the machine tool is fundamentally improved. Therefore, a machine tool that has been idle for many years is put back into production, and the intended purpose of the transformation is achieved. (Test information is omitted)

(Finish)

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