Double housing planer advocate procrastinate move systematic frequency control to transform

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1 foreword double housing planer regards machinist job as one of medium main job machine tools, important place is had in industrial production. Its movement way is more, the structure is complex, procrastinate use circuit electric machinery more, control is multifarious, safeguard, the overhaul is painful. Be in actual in, the circuit of double housing planer is regarded as to examine one of difficult problem of technician all the time. As the development of industrial automation, transducer, PLC is used extensively in transforming in plant equipment, undertake transforming to double housing planer, more and more general already. 2 double housing planer advocate the double housing planer that delays the active production of athletic characteristic our country that uses a system its advocate procrastinate change way with dc dynamo, electromotor group and brilliant brake canal, electromotor system is given priority to, it is with A series double housing planer exemple, it uses electromagnetism to expand machine the dc dynamo that regards excitation as adjuster, electromotor system, through adjusting dc motive voltage adjusts output speed, the Electromechanical that adopts speed change of gear-box of two class gear adjusts jointly method. Its advocate motion is the reciprocate with dig frequent stage, in move back and forth in a cycle, have particular demand to the control of speed, if pursue,1 is shown. Graph the motion of 1 dig stage pursues medium: T1 paragraph state dig stage starts, planing tool cuts the level of workpiece, just cut the instant of workpiece to reduce planing tool, the concussion that cutting tool place suffers and prevent workpiece to be moldered, this phase speed is inferior. T2 paragraph cut for dig paragraph, dig stage cuts speed T3 to normal dig quickly paragraph quit work for planing tool paragraph, be burst apart to prevent the brim, similar requirement speed is inferior. T4 paragraph to return paragraph, in returning a process, planing tool not cutting workpiece, to save time, improve treatment efficiency, return speed to answer as far as possible some taller. T5 Duanwei buffer. Return stroke is about to end, arrive reversely again before working rate, to reduce mechanical to transmission impact, answer to lower rate, below one cycle is entered later. The physical characteristic curve that 3 dig stage moves and machine tool of very much cutting are identical, character of dig stage motion divides kind of circumstance analysis. 3.

When speed of motion of stage of dig of area of 1 low speed is inferior, the cutting force that right now planing tool allows by electromotor the biggest torsion is decided. After electromotor is affirmatory, defined the power of the biggest cutting when low speed is machined namely. Accordingly, the area is machined in low speed, electromotor is constant torsion output. 3.

When rate of region of 2 high speed is higher, right now cutting force accepts the intensity restriction of rigid structure, force of permission the biggest cutting and speed become inverse ratio, accordingly, electromotor is constant power output. Can get from this, advocate pull those who change systematic dc intention to run cent of physical characteristic curve to if the graph shows two paragraphs 2 times,be. Graph the requirement of physical characteristic of 4 pairs of electromotor is 2 laden physical characteristic make full use of electromotor capacity, satisfy the load requirement to electromotor at the same time, double housing planer advocate pull the physical characteristic when moving electromotor to move to should cooperate with laden physical characteristic, electromotor physical characteristic should be stood by and be located in namely over laden physical characteristic. Physical characteristic of 5 frequency control from electromotor timing theory knowable, if use frequency control, in frequency under rated frequency when, electromotor timing has constant torsion to output character, and in area of prep above rated frequency, electromotor voltage cannot lift, have constant power to output character. Graph physical characteristic of 3 frequency control is more knowable, when using frequency control, the physical characteristic curve of electromotor just as corresponding as the athletic place of dig stage characteristic curve conform to. Accordingly, be opposite at using frequency control aptly double housing planer advocate athletic system undertakes transforming, make the working frequency of electromotor rises appropriately to rated frequency above. Because the main transfer machinery of double housing planer is 45r/min cent to be two archives from speed, the physical characteristic of reason electromotor also divides two similar paragraphs into the curve with 45r/min. The 6 dig stage campaign that use frequency control are controlled 6.

1 rigid structure and control requirement are used at realizing dig stage to go back and forth between pilot 6 journeys switch still is like original place to show installation, installation of swallow end chamfer bumps into workbench lateral 4 times piece. Support bumps into the journey switch with a corresponding collision 4 times to realize the automatic job of workbench. Advancement bumps into an A, B, regressive bump into a C, D to distributing in journey switch two side. The graph shows the null state that is each journey switch 4 times. Graph process of control of campaign of state of null of switch of 4 workbench journey is as follows: When workbench is ongoing, bump into an A to bump SQ3, b bumps SQ5, after passing a paragraph of offside, dig stage is regressive. When backing down, bump into a B to make SQ5 restoration, bump into an A to make SQ3 restoration. Regressive at last, after workpiece exits cutting tool, bump into a C to bump SQ4 to make electric machinery decelerate, d bumps SQ6 to make electric machinery inverting, after passing a paragraph of offside, dig stage from hind exchange a purchase becomes advancement. Dig stage works circularly by this means namely. SQ2, SQ1 removes ongoing, regressive spacing protection respectively. To satisfy the treatment requirement of double housing planer, requirement workbench has adjustment positive and negative to use control and the automatic roundtrip control when working normally to the dot, the grinding that can have low speed works. Outside controlling circuit to divide the campaign going there and back that includes dig station, still have dig station between motion and beam, tool carrier cooperate. Dominate circuit to simplify, reduce safeguard workload, the automation that can use PLC to regard control as planer of component and transducer union implementation is controlled. 6.

The PLC frequency control that dig stage motion going there and back is under 2 control circuit dominates circuit picture. Among them PLC introduces series of FX of 3 water chestnut, what transducer uses is a series that install V2. In the graph, SB1, SB2 is case, stop pushbutton SB3, SB4 to use button to the dot for positive and negative; SB5 is breakdown restoration pushbutton. SQ1 ～ SQ6 is switch of on planer 6 journeys, x13 receives transducer breakdown to output upright R2A, control Y11, Y12; The system always starts to be controlled by SA. Graph 5 advocate procrastinate in moving PLC of hookup of systematic PLC frequency control to output signal, electromotor of control of Y0, Y1 is circulating reversely movement, dot is moved reach stop; Y2, Y3, Y4 controls transducer 3 archives rotate speed, namely low speed (planing tool is cut, planing tool is exited, retrorse before) , middling speed (dig cuts treatment rate) , high speed (empty knife returns) , y10 controls contactor KM, make transducer gets report, in PLC program, should make after Y10 movement, movement of ability of Y0, Y1; Reputation has when Y11, Y12 is transducer breakdown, light calls the police, should cut off the output of Y10 at the same time. Above of 7 last words introduced double housing planer advocate the frequency control of athletic system is transformed. Transform via this, can simplify greatly advocate procrastinate use a system, reduce safeguard workload, raise moving dependability. The whole electrical system of double housing planer can undertake on the foundation here, want I/O check the number according to systematic place, choose appropriate PLC model, corresponding wiring, modify a program can. CNC Milling