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Technical transformation of CNC lathe Zhu Fumin Xiangyang Automobile Bearing Co., Ltd., Wufan Bearing Road No. 1 441022, 0710-3561690, Hubei, discussed the matching and interface circuit of the lathe circuit, and then compared the similar CNC lathes, and achieved the desired effect.
Key solid: CNC lathe; technical transformation First, the situation and modification method of CNC lathe technology transformation I can not buy spare parts after the failure of the main control system, the software program can not be recovered after the loss, so technical transformation is required. The basic configuration of the CNC system is based on the H9S5510CNC numerical control system developed by the Machinery Department of the Taiwan Industrial Research Institute. It can control the X, IV, professional production equipment renewal and transformation should still adopt a combination of enterprise and social professional manufacturing plants. The products produced are very mixed. As long as there is demand in the society, the enterprise will produce, which determines that the production methods and equipment of the enterprise often change. In addition, the production batch size is small, and some of the required professional production equipment is difficult to buy in the market, and the enterprise can only design and manufacture it by itself. While the professional manufacturing plant has strong technical design and manufacturing strength, it is not as familiar with the production process and equipment debugging as the manufacturer. Therefore, we should adopt a combination of the two to give full play to the advantages of both sides in order to produce professional production equipment that is welcomed by private enterprises.
set up. I/O input is 24 points and output is 16 points.
The spindle control system is powered by Sakamoto Fuji inverter FVR110G7S-4E; and the control unit of the three-phase inverter electric servo control system produced by Jiaxing Motor Factory adopts the software AC servo drive VLASE-050P from Sakamoto Toyon, which can drive 1.5~2.4kW. AC servo motor, Z-axis; VLASE-020P, can drive 0.75~1.1kW AC servo motor, X-axis.
The transformation adopts the numerical control system of Huazhong CNC System Co., Ltd., 14-inch color CRT display, box-type structure 486CP9 industrial computer, and 5. The private enterprise urgently needs the training of equipment professionals and the exchange of technical information. The organization organizes the technical training of professional management personnel and skilled workers, so that the management cadres can achieve a specialization and multi-energy, in order to meet the actual needs of a private enterprise. In addition, private enterprises often have no superior units, and the information is not smooth enough. In order to improve the competitiveness of their products, they also need to know all kinds of information on the market. Therefore, social intermediaries are required to do a good job in this regard. However, there are currently few such intermediary service agencies, especially for private enterprises. The association should pay attention to this, put the service for private enterprises mentioned in the agenda, actively study the needs of private enterprises, and do a good job in service.
Huazhong CNC main control (CNC) system basic configuration diagram) HC4301 is a multi-function pulse position board, in line with the ISA bus specification, with a D / A analog output, control spindle motor. Two positive and negative pulse reversible counting input, control manual pulse generator and spindle encoder; G) SIO pulse interface position board, provide speed analog quantity reference to analog servo drive system, control two-way feed servo unit; (3 ) HC4103 two blocks) is the PLC input board, and HC4103T is the PLC input adapter board. HC4203 is the PLC output board, HC4203T is the PLC output adapter board; é’) B9014 is the four serial port board, which contains four standard RS-232C serial ports for CNC system and machine tool panel keyboard; (5) HC5301 is the input lamp terminal board , HC5301 is the output lamp terminal board; (6)! Two kinds of AC servo units, control two AC servo motors, 50A control X axis, 75A control Z axis two axes control principle is the same, see); (7) Servo power module 7.5kW, slot chassis with power supply)) Control axis number , 2~4 axes, linkage installation 3.5〃 1.44MB floppy disk drive å¨X number of air shafts, 2 axes; () with automatic, jog, hand, step, zero return function, single segment / hop / dry run / Machine lock function; (3) Minimum resolution 0.001mm, decimal point input; (4) Static simulation processing process, dynamic tracking processing process, Chinese display various prompt information, human-machine dialogue interface is intuitive, lively; (5 ) Built-in PLC status display, axis parameter setting, analog and digital servo control can be mixed; (6) machine tool, graphic parameter setting, self-diagnosis function, alarm information prompt.
The machine tool panel, operation box and related components are attached, and the original low-voltage control power distribution cabinet is modified. The operation panel and the power distribution cabinet are combined into one, and one air conditioner of the machine power distribution cabinet is added.
The mechanical, lubrication, and hydraulic parts are basically unchanged. Keep the original spindle inverter and spindle motor part.
The principle of electric control of the original CNC lathe is analyzed. According to the function of the built-in PLC of the system, the PLC control program and I/O interface of the electric control system are determined. To modify the lathe electrical appliance, the design must meet the requirements of the controlled object process control, establish the process control program, and then determine the PLCI/O points and preliminarily calculate the required memory capacity.
The allocation of I/O points. Through the analysis of all control circuits of the CNC lathe, the number of I/O points of the PLC including the mechanical operating panel, control and monitoring protection of the lathe is confirmed.
Table 1 \, machine tool CNC system configuration Taiwan HSUTCNC configuration Huazhong CNC Huazhong function æ›° 本 TO äº¤æµ TO !! Type AC servo setting function mm Maximum programming quantity mm User storage quantity input mode Paper tape, hand input, DNC hard disk no fault diagnosis prompt message Built-in 24-point input Built-in 48-point input 16-point output 48-point output working feed speed Spindle number Spindle Maximum speed Linkage number Hand crank pulse generator Multi-quadrant Arc interpolation Spindle power kW Human coal roller screen quick repair method Cui Jianzhong): TD452:B Our company's branch factory is adding a coal processing system A roller screen for pre-screening of the lump coal. When the mixed coal of different block diameters passes through the roller shaft sieve, the coal with the good diameter of the block falls, and the secondary coal is sieved, and the remaining lump coal is sent to the double-toothed roller crusher for crushing processing.
After several years of operation, the roller shaft has been running normally, but the lump coal has stopped moving in the original place, so that the subsequent process cannot work and directly affects production.
The roller shaft is a hollow steel casting, designed according to the requirements of the qualified coal block diameter, and the structure is as follows.
After observation and analysis, due to the long-term contact of the coal with the roller shaft, the shaft surface is polished and the friction coefficient is reduced; while the tooth top for the conveying work is also sharpened, and the roller shaft sieve is not normal due to the small specific gravity of the coal. jobs.
On the same axis, every other tooth is equally divided by 120 degrees to process three deep vertical faces. For example, the teeth of two adjacent rollers should be staggered 45.~60......
This method has no effect on the structure and strength of the shaft. The contact surface of the machined surface and the coal is increased, and the façade can be positioned to prevent slipping or rotation, and the lump coal is moved forward when the roller shaft rotates.
The effect after installation is good. This method is simple, fast and applicable. It can save more than 20,000 yuan in spare parts every year.
PLC programming. According to the processing object, process requirements and execution sequence of CNC lathe, PLC control program is divided into: (1) advanced program; (2) operating program; (3) hydraulic control; (4) coordinate axis control; (5) spindle control; (6) Other control; () Fault detection processing.
The memory capacity of the PLC is calculated by the number of PLC program steps. According to the number of program steps of the PLC, several pieces of EPROM (Read Only Memory) and several steps of the program are selected.
Third, the signal matching and interface circuit lathe circuit design should pay attention to the classification of the signal, the same function of the signal as much as possible to be wired together. To deal with the grounding problem of the spindle control system and the coordinate axis servo control system, try to avoid and overcome the mutual interference between the CNC system and the servo control system. ) programmer input; () CNC system tape input; (3) computer + programming software input; () ERPOM dedicated read and write memory input.
2. Debugging. The PLC program can be displayed on the CRT of the CNC system, and the PLC programmer can be connected to the CNC system instead of the built-in PLC), so the debugging of the PLC program is very convenient. The specific debugging methods are: (1) indoor simulation experiment debugging; () lathe online on-site debugging.
1B CNC lathe comparison see Table 1) J1FCNC-1B CNC lathe in 1995 equipment value of 446,540 yuan, 2002 lathe residual value of 200,000 yuan, lathe transformation investment of 72,000 yuan, a net output value of 174,450 yuan.
The economic benefits of investment. According to the two-shift system, 170 pieces/each class, the output value is 48 yuan/h, the annual output value is 129,000 yuan. The equipment renovation investment can be recovered in only six months.
(Finish)
During crane or trolley running, the brakes or limit switches may suddenly break down. Due to inertia, the vehicle will continue in the state of motion until running into the end stop preset at both ends of its runway track. The aim of adding a crane buffer to the contact area between the end stop and trolley or crane is to absorb the majority of energy produced in an impact shock. Following is a list of two buffer forms most commonly in use today.
Crane Buffer,Crane Buffer Device,Polyurethane Crane Buffer
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