The application of Sen Lan transducer on planer-type milling machine

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One, overview planer-type milling machine is to machine the machine of larger work to add equipment, its electric equipment controls a system to include workbench advocate the logic of transmission and feed orgnaization controls two much. Company of Jiao Zunmai family has Henan a planer-type milling machine, used up to now from 70 time old. The workbench of planer-type milling machine advocate transmission uses direct current reversible timing procrastinates change way. Inchoate dc timing controls a system to be formed by discrete element, used a certain number of after year, fault rate rises apparently, maintain workload quantity to increase ceaselessly, breakdown man-hours in idleness rises quickly, affect manufacturing on the rails already badly. Original dc timing system had fallen into disuse, be impossible to change new processing to dc timing system, undertaking technical reformation is inevitable choice. 2, transform plan to dc timing system, if withhold dc electric machinery, timing system can use system of timing of dc of digital type silicon controlled rectifier, be like Ou Liu 590A, xi Menzi 6RA70, ABBDCS400. The advantage of this kind of plan uses original dc electric machinery namely, economically compare a province, but defect also is apparent, its defect is dc machine relatively those who communicate electric machinery of asynchronous squirrel cage safeguard workload big, used old dc electric machinery especially, rectification child wear away serious, maintenance costs more. Another kind of plan uses communication timing system, will advocate transmission dc electric machinery is changed to communicate electric machinery of asynchronous squirrel cage, timing controls a system to use transducer. The defect of this kind of plan is outside dividing need transducer, still need to change dc plane for alternating current machine, transformed cost is relatively a few higher, but, structure of alternating current machine is simple, maintain a volume small, transducer performance is good, facilitating implementation is best control. After the actor of low quality that compares two kinds of plan, the choice transforms program with what communicate timing. 3, of workbench of planer-type milling machine of process of campaign of workbench of planer-type milling machine procrastinate move belong to smooth and fast campaign system, following plan institute show the working flow of workbench: Journey of milling of job of milling machine workbench and the change that return a process represented in the graph. Idle stroke of workbench of milling machine of 0 ～ T1 starts; Workbench of milling machine of T1 ～ T2 runs with stabilizing speed N1; Workbench of milling machine of T2 ～ T3 takes milling load to quicken; Workbench of milling machine of T3 ～ T4 runs with stabilizing speed N2; Decelerate of workbench of milling machine of T4 ～ T5; Workbench of milling machine of T5 ～ T6 maintains the cutting tool below N3 speed condition to leave work; Decelerate of workbench of milling machine of T6 ～ T7 arrives 0; Primary treatment position is returned after workbench of milling machine of T7 ～ T10 quickens apply the brake of high speed movement reversely, be in from this repeat above narrates milling circulates. 4, the frequency conversion of planer-type milling machine is transformed 1. The type selecting of the computational transducer of the type selecting of transducer and capacity wants the size of basis communication electric machinery, the choice of the capacity of alternating current machine wants to be referenced basis with dc machine again. Parameter of electric machinery of former workbench dc is: PN=18.

5KW, NN=1000r/min, communicate electric machinery PN=18 correspondingly with this photograph.

5KW, NN=970r/min, planer-type milling machine often works to machine condition in low speed, to assure to machine quality, the torsion when low speed of requirement electric machinery is big, considering the physical characteristic of alternating current machine, electric machinery communicating in the choice is to increase a size appropriately. This exemple communicates electric machinery choosing to be 22KW6 extremely squirrel cage electric machinery. After electric machinery size is certain, can choose the capacity of transducer directly. Workbench of planer-type milling machine is constant torsion load, the requirement starts and low speed moment of force is large, had better choose vector to control transducer, choose the SB61G transducer that hopes the company produces Sen Lan. This transducer is used do not have speed sensor vector advancedly to control algorithm, the function is all ready, freely applies in all sorts of industries. Can choose way of control of the closed circuit of V/f open loop, V/f, vector that do not have PG and control of vector having PG; Can choose clavier and outside terminal, the mode of operation of functional terminal, have opening of RS485 serial communication, facilitate with computer group the net is controlled. Undertake in the design dependability is designed, electromagnetism is compatible design, stability analysis, have very good performance. This exemple chooses transducer of Sen Lan SB61G22KW. Consider time of return stroke of milling machine workbench is shorter, inertial bigger, need deserves to use unit of apply the brake and resistor of apply the brake, the standard when resistor of apply the brake presses torsion of 100% apply the brake configures 30 Ω , 5KW, consider apply the brake is more frequent, the size that increases resistance appropriately arrives 10KW. Of groovy design communicate asynchronous electromotor from cold pattern, inside the environmental temperature limits of rated operating mode and regulation, won't exceed rated temperature rise. But when asynchronous electromotor communicating to move below in 20Hz frequency from cold pattern after frequency control, rotor takes the wind- driven cut of fan oneself, of electric machinery medicinal powder hot property becomes poor, overheat of opportunity of the report when if be below condition of constant torsion load,moving for a long time. Accordingly, the electric machinery that runs to long-term low speed needs to add constant speed fan to drop in temperature. The method that adds constant speed fan is the end cover debus that will communicate asynchronous electromotor, the round hole that digs to shed fan photograph to suit with the axis in end hood, after making its axis sheds fan to had been installed, the wind energy that blows arrives entirely on the back end lid of electric machinery, go up to each direction of electric machinery airframe via housing deflector diversion, those who make can be right electric machinery can cool equably partly individually. The axis sheds the power source of fan to use 220V city phone. 2. The set of transducer function is seen from flow chart of job of workbench of planer-type milling machine, the traversal speed of workbench has 4 paragraphs, namely N1, , N2, N3 and return traversal speed. Set SB61S22KW transducer to be multistage speed controls fashion, the multiterminal frequency control of transducer inputs terminal to be X1, x2, x3, x4; is multistage the frequency value of speed is decided by processes work, add, the time of decelerate, by functional code F009, f010, f631-F636 decision.

Its control signal to take do not have contact switch from milling machine, want milling machine workbench to move only corresponding position, without contact switch output signal sends to the input port with corresponding transducer, transducer is quickened, decelerate, retrorse or constant speed moves. 3. Because the application of PLC controls circuit and low pressure yuan ageing of parts of an apparatus, be opposite workbench of planer-type milling machine advocate while transmission frequency control is transformed, undertake transforming to the control line road of milling machine. With PLC but greatly the complexity that reduces control circuit, and but bring down cost. PLC chooses HOLLIAS-LECG340 to nod PLC, process designing means is echelon graph, simpler, no longer give uncecessary details. 5, the machine tool that manufactures before 70 time of adscript our country, gear-box machinery is used to shift gear when needing timing timing pattern or use dc timing means. The acquisition of direct current source is to use AC motor to drive dc generator, the timing of motive of dc drive dc that give out moves. After 70 time, after commutator of silicon controlled rectifier appears, dc timing leave out the segment that AC motor takes dc dynamo, efficiency substantially rise, moving noise huge drops. The development as frequency conversion technology and perfect, the function of transducer rises ceaselessly, and the price falls ceaselessly, already replaced dc timing system stage by stage. Pass its periphery minority a few terminal, with respect to the control that can realize full to the machine tool range, and transducer interior has more perfect protection function, need not consider to protect circuit when the design dominates circuit, simplified already circuit reduced cost again. Transform through be versed in to planer-type milling machine the stage pulls those who use a system, used PLC and transducer, with communication timing system replaces dc timing system, simplified the control line road of equipment, fault rate drops almost 0, realized reliable, fast, quick control, make the milling quality of workpiece rises with what work efficiency Dou Youming shows. CNC Milling CNC Machining