Frequency conversion is recording model machine energy-saving the application in transforming

Time:2023-06-30 17:01:50
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source:EDON CNC Machining

1 frequency conversion is transformed go to plastic products in trend of development of the industry that note model for course of study, power consumption is the body that its produce cost, and one of equipment of main specific power consumption that the machine that note model is plastic products plant. At present the machine noting model of great majority belongs to fluid drive to record model machine, the motivation in fluid drive system drives oil pump to offer by electromotor. In the manufacturing cycle procedure that notes model, the flow that the machine that note model needs below different process and pressure are different, must rely on flow valve and pressure valve to adjust the flow that different process place needs and pressure. The bear change of hydraulic pressure system is very big, because mensurable pump is not adjustable,output power, because this redundant energy can be in only,fender, oil path is divulged, use up in oily temperature rise. Such already aggravate of all sorts of valve wear away, cause oil again lukewarm exorbitant, electromotor noise is too big, and the phenomenon such as mechanical loss of life. And be normally in the design, the capacity that electromotor of user oil pump designs is very more than needing tower above actually, exist " car of big Ma La " phenomenon, create a large number of waste of electric energy. Because this popularizes communication,frequency control device is noting the application on model machine, it is wasteful to reducing the sources of energy, important to reduce manufacturing cost to have meaning. The feasibility that frequency conversion of the 2 machine that note model transforms is analysed 2. The manufacturing process of the 1 machine that note model notes model machine to use hydraulic transmission normally, its structure includes inject unit, open device combining a model, fluid drive device and electric control equipment, latter effect is the requirement that makes sure the machine that note model books working procedure (pressure, speed, temperature, time, position) work effectively with behavioral program. Device of the fluid drive in the machine noting model in the tradition basically controls electromagnetism of proportioning valve of electromagnetism of a powerful person, pressure, discharge by oil pump, hydraulic pressure electromotor of oil cylinder, oil pump reachs the proportioning valve, action that all sorts of differring accessory of other hydraulic pressure and conduit composition, the motivation in fluid drive system drives oil pump to offer by electromotor. Among them, oil pump majority is mensurable oil pump, electromotor offers rated power and rotate speed normally, the mechanical energy change that oil pump inputs electromotor place is pressure can, transport the hydraulic pressure oil that has constant pressure and flow to the hydraulic pressure component of hydraulic pressure system next, what load of drive of actuator of contented hydraulic pressure needs the requirement of energy. The machine that note model shapes craft is according to booked periodic start course, namely in order to combine a model, advancement ejaculation the mouth, shoot glue, protect pressure, frit glue cools, open a model to take out product, the model that be noted in putting a pattern, the top after combining a model goes out wait for treatment working procedure to achieve some product to shape. If pursue,L place is shown. 2. The hydraulic pressure loss in process of production of the 2 engine that note model notes model machine to produce a course medium hydraulic pressure loss is main by the following 3 parts composition: (1) overflow loss differs along with product and treatment working procedure, place of each working procedure needs hydraulic pressure, discharge, pressure to differ. To oil pump electromotor, the load that the machine that note model is noting model procedure is to be in metabolic shape Tan. And the discharge of oil pump is the largest flow that needs according to place will design. Its note the hydraulic pressure flow that electromotor of model oil pump provides with constant rotate speed formerly, when the flow that needs when place of the machine that note model is less than the largest flow, redundant hydraulic pressure will pass circumfluence of overflow a powerful person, energy of this one part was dropped with respect to loss. (2) the meeting when the mouth has the reduce expenditure that reduce expenditure loss banishs classics a powerful person when hydraulic pressure oil to be pressed certainly fall, this is reduce expenditure loss. Because the reduce expenditure area ratio of directional a powerful person is older, so major reduce expenditure loss occurs on proportioning valve. Circulate for a long time amain as a result of hydraulic pressure at the same time flow and machinery of fluid casting die are acuteness grind, cause oil lukewarm exorbitant, noise crosses the undesirable phenomenon such as big, mechanical loss of life. (3) design surplus loss is normally in the design, general meeting considers common quality, when the design with most high capacity is a foundation, because the capacity of design of electromotor of this user oil pump is compared,need a high mountain actually a lot of. Exist " car of big Ma La " phenomenon, create a large number of waste of electric energy. 2.

The working procedure process that the feasibility that frequency conversion of the 3 machine that note model transforms analyses the machine that note model is primary it is identical, can divide roughly for process of 7 working procedure: Combine a model, shoot glue, protect pressure, frit glue, cooling, open model, top to go out, each working procedure needs different pressure and flow, the work that is processed that is to say is not to be below the greatest pressure or discharge at what make. Its pressure and discharge rely on pressure proportioning valve and discharge proportioning valve to adjust, will control pressure and discharge bulk through adjusting pressure or the open of discharge proportioning valve to spend. It is however in constant speed movement, the power input of the oil pump in each working procedure is done not have how old change, if use synchronism of the pressure that when transducer basis works, needs or discharge parameter,become the rotate speed of the electromotor of self-correcting oil pump of direct ratio, realize the adjustment of pair of pressure and discharge thereby, the energy that wastes the opportunity that note model on proportioning valve so so is all and managing come down, achieved already section report economic economic effect. Its are specific effect watch is the following now 3 respects: (1) timing is energy-saving ask according to noting the craft of model machine, always approach a powerful person, low-pressure valve, press a powerful person, 2 switch that approach valve signal classics notes model Electromechanical the frequency that the input end that after cerebral board is changed, is added in transducer regards transducer as gives signal, the form of imitate signal thread that makes the output frequency of transducer follows proportioning valve changes, make in needing the process with pressure and lesser discharge electromotor rotate speed is reduced, reduce the output power of electromotor thereby, electromotor can let stop into the process in refrigeration and semi-manufactured goods buy turn, make electromotor reachs the smallest level in the energy loss inside whole and laden limits. (2) raise power factor energy-saving without result power not only those who add line caustic and equipment is calorific, because,mainer is of power factor reduce those who bring about power of have rendered great service of electrified wire netting. Because the power that common and mensurable pump concentrates model machine is numeric in 0.

6 ～ 0.

8 between, and after device of use frequency control, as a result of the compensation action of capacitance of wave of the filter inside transducer, make power factor rises 0.

96 above, reduced thereby without work loss, increased the power of have rendered great service of electrified wire netting. (3) soft start energy-saving because former electromotor is,start directly or one △ step-down starts Y, starting electric current is equal to (4 ～ 7) the rated electric current of times, such meetings cause severe impact to Electromechanical equipment and power supply electrified wire netting, and still can raise requirement of capacity of electrified wire netting, the big electric current of the generation when starting and the service life that shake pair of equipment are very adverse. And use frequency conversion is energy-saving after device, the soft starting function that uses transducer will make start electric current from 0 begin, the electric current in the acceleration that maximum is installed in transducer by limitation is restricted a horizontal less than, do not exceed L commonly.

7 times rated electric current, reduced the concussion to electrified wire netting and the demand to capacity of electrified wire netting, prolonged the service life of equipment and mould. The control circuit program that frequency conversion of the 3 machine that note model transforms 3. The control circuit that frequency conversion of the 1 machine that note model transforms pursues (if pursue 2) record model machine frequency conversion is used when frequency conversion politics is built + way of labour frequency work, following plan institute show control circuit. Way of way of work of its frequency conversion, labour frequency work and the choice that quit the job are by many switch WK control comes true. Using end of labour frequency bypass is to trouble gives in transducer when but direct switch moves to labour frequency, and do not affect production. 3. Way of work of 2 frequency conversion (1) put through power source of frequency conversion job. Close to work to frequency conversion when many switch WK when power source, contactor KMI coil gets electric start, KMI is auxiliary often shut touch a head to disconnect, circuit of labour frequency job cannot get report, what realize circuit of frequency conversion job and circuit of labour frequency job thereby is mutual and interlocking; At the same time contactor KM4 coil gets electric start, KM4 advocate touch a head to close, electromotor accepts △ form connection. KMl advocate touch a head to close, three-phase alternating current connects transducer. KMI is auxiliary often leave touch a head to close, contactor KM2 coil gets electric start, KM2 advocate touch a head to close, circuit of transducer and three-phase AC motor puts through, await working instruction; Indicator light of HL2 of frequency conversion job is bright at the same time. (2) process of transducer timing job. Press transducer starts switch SB, transducer begins to move, the machine that note model begins the work. Head of the Electromechanical that note model board the machine that note model the pressure of fluid drive and discharge signal, via the voltaic imitate of 4 ～ 20mA turning into signal after processing, send transducer 4, 5 port. Transducer is passed inside the PID of buy adjusts function, use the Electromechanical that note model cerebral board is deferent the voltaic imitate signal of cerebral 4 ～ 20mA, will adjust the rotate speed of electromotor, came true to record model machine thereby the pressure of fluid drive and the roll that discharge signal controls electromotor, turned constant voltage pump into transformation pump, satisfied the machine that note model the requirement of the different hydraulic pressure of fluid drive and discharge. Decreased to combine a model greatly so, fly a model shake, stabilized manufacturing technology, improved the class of the product and quality, reduced mechanical failure, prolonged mechanical service life, at the same time managing also electric energy, produced good economic benefits. (3) the protection of transducer and breakdown processing. Transducer oneself has had electric current, overload, press too, owe pressure, a variety of protection functions such as short circuit, it can protect transducer oneself not only, and can protect electromotor, further protection fixes system of model machine hydraulic pressure, mechanical system, avoid the harm that impertinent operation may bring, do not need to set special protection circuit additionally so. If implement the pressure that uses the need that make place, rate,fix the pressure of model engine system, rate more than, transducer enters protective state namely. Be like microtherm again forcibly store makings, because note work of model machine overload, transducer can have appeared electric current or overload protection, cut off electromotor power source, protective machine does not suffer harm. If be below labour frequency condition, the machine that note model is OK the dynamical excess load with powerful have the aid of works, the likelihood causes the accident such as motor of canister of twist off makings, screw or attaint hydraulic pressure. When transducer malfunctions, of two end of B and C often shut switch to disconnect, contactor KMI coil breaks electric restoration, transducer job power source disconnects, quit the job; Of two end of A and C often open switch to close, HLl of breakdown indicator light is bright. After waiting to remove trouble, transducer starts the work afresh. 3.

Way of work of 3 labour frequency closes to work to labour frequency when many switch WK when power source, contactor KM4 coil gets electric start, KM4 is auxiliary often shut touch a head to disconnect, circuit of frequency conversion job cannot get report, what realize circuit of labour frequency job and circuit of frequency conversion job thereby is mutual and interlocking: At the same time electromotor uses Y method of one △ step-down starts move, the machine that note model begins the work, indicator light of HL3 of labour frequency job is bright. When frequency conversion of the 4 machine that note model transforms the advantage with convenient wiring to note model machine frequency conversion to transform wiring, one △ step-down starts the Y of the oil path that withholds the computer with the original machine that note model to control system and fluid drive system and electromotor moving circuit is changeless, use frequency conversion energy-saving / labour frequency runs changeover to control fashion, the influence when avoiding to malfunction produces normally: Change change of the simply when the mould notes model Electromechanical the working program of cerebral board, need not do any adjustment to transducer. The favorable beneficial result that frequency conversion of the 5 machine that note model transforms 5. 1 after reducing manufacturing cost and section report effect to note model machine to use frequency conversion to transform apparently, section report rate is as high as 25 ％～ 60 ％ ; Power factor by 0 before transforming. 6 ～ 0. 8 rise 0. 96 above, raise factor of power of electrified wire netting significantly, reduce without result electric current, reduce circuit loss thereby, achieved the goal that reduces manufacturing cost and section report. 5. After the 2 dependability that rose to note model engine system to move note model machine to use frequency conversion to transform, because transducer oneself has had electric current, overload, press too, owe pressure, a variety of protection functions such as short circuit, it can protect transducer oneself not only, and protected electromotor and system of hydraulic pressure of the machine that note model, mechanical system, avoid the harm that impertinent operation may bring, can discover breakdown calls the police in time. 5.

The 3 service life that prolonged equipment and mould, rose to note class of model machine product and product quality.

The soft starting function that uses transducer will make start electric current from 0 begin, reduced the concussion of starting electric current to electrified wire netting and the demand to capacity of electrified wire netting not only, and reduced vibration of model opening a lock, prolonged the service life of equipment and mould, reduce noise, improve working environment, prolonged the service life of equipment and mould. At the same time the flowing timing of transducer, improve the class of product of the machine that note model and quality greatly. The machine that note model used frequency conversion energy-saving technology, got high energy-saving, high reliability and the remarkable result that prolonged the service life of equipment and mould not only, and the class that improves product of the machine that note model greatly and quality. The article is aimed at 6 last words the machine that note model exists in fluid drive system the phenomenon with electric energy bigger loss, the design went out to adopt the transform specific circuit plan of transducer technology, achieved the product class that increases the chance that note model and product quality through practice, prolonged the service life of equipment and mould, reduced production cost and managing the end that uses phone. CNC Milling CNC Machining