Methiannau posibl a chamau diagnosis system hydrolig y peiriant mowldio chwistrellu

When using an injection molding machine, mae methiannau posibl system hydrolig y peiriant mowldio chwistrellu yn amrywiol. Mae'n ganlyniad cyfuniad o lawer o ffactorau, ac mae'r gwasgariad yn gymharol fawr. Felly, wrth wneud diagnosis o nam, mae angen dadansoddi'r ffactorau sy'n achosi'r nam fesul un, pay attention to their internal connections, and find out the main contradictions, so that they can be resolved relatively easily.

O dan amgylchiadau arferol, the failure of the hydraulic system of the injection molding machine is not accidental. Any failure will be accompanied by various abnormal signs before it evolves into a major failure. These signs can be summarized as:

(1) There are abnormal sounds, such as pumps, motors, and thermostatic valves.
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(2) The operating speed of the hydraulic motors for slewing, walking, and hoisting, as well as the hydraulic cylinders of various working devices, is reduced and weak.
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(3) The oil tank level drops and the oil deteriorates.
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(4) Oil leakage occurred on the outer surface of hydraulic components.
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(5) The oil temperature is too high.
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(6) Pipeline damage, looseness and vibration occur.
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(7) The smell of focal nucleus appears and so on.
All of the above phenomena can be discovered by naked eye observation, hand touch, and nose smell as long as you pay careful attention during use. In actual work, people use this on-site method as the first-hand information to analyze the failure, and then based on experience, synthesize these first-hand information to analyze the actual problem and find out the cause of the failure as early as possible. Be resolved.

Fodd bynnag, in actual work, it is often impossible to accurately diagnose the cause of the failure at one time. Ar y funud hon, several iterations are required, hynny yw, repeated analysis and repeated inspections until the cause of the failure is found.

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In actual work, engineering and technical personnel often follow the following steps to deal with faults in the hydraulic system.
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(1) Understand the system
When a certain peiriant mowldio chwistrellu has a hydraulic failure, you should first understand the hydraulic system. It is to be familiar with the relevant technical data and reports, understand the working principle of the liquefied gas pressure system, understand the basic structure of various components and the specific functions in the system, and be able to find out the liquid flow process under various working conditions. Before inspecting the equipment, observe the working conditions of the system and record the necessary technical data, such as working speed, pwysau, llif, amser beicio, ac ati.
(2) Ask the operator
Interrogate the operator operating the malfunctioning injection molding machine. Ask about the characteristics of the equipment and its functional characteristics; ask about the basic phenomena when the equipment fails, such as whether the hydraulic pump can be started, whether the system oil temperature is too high, whether the system noise is too high, whether the hydraulic cylinder can drive the load, ac ati.
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(3) Verify the phenomenon provided by the operator and check carefully
The phenomenon proposed by the operator is further verified by observing the meter readings, working speed, listening to the sound, checking whether the oil and actuators have malfunctions, etc.; then, according to the fluid flow in the system, look carefully along the loop from the tank in turn, and on time Record the observation.

During the inspection, carefully check the oil in the fuel tank to determine whether dirt enters the system. Affect the normal operation of each component of the system; touch it by hand to check whether the oil inlet pipe and high-pressure oil pipe are proliferated, softened, leaked, or damaged; check the pipe joints of the control components and the mounting screws of the housing if they are loose; finally check the oil and Piston rod of hydraulic cylinder. In each step of the inspection, attention should be paid to whether there is improper operation or maintenance to find the cause of the failure.
(4) List the possible causes of failure based on the information obtained from understanding, inquiry, verification and inspection
Ar y funud hon, it should be kept in mind that a failure phenomenon may be caused by two or more reasons. Er enghraifft, the speed of the actuator may decrease, which may be due to the wear of hydraulic pump parts, or the internal leakage of the hydraulic cylinder may increase; er enghraifft, If the oil temperature is too high, it may be that the amount of oil in the oil tank is not enough, or that the oil pollution blocks the heat dissipation surface, or the pressure of the overflow valve is adjusted too high.
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(5) Make a conclusion
According to the list of failure causes, the inspection sequence is arranged according to the principle of “easy first and then difficult”. First select those that can be restored to normal after a simple inspection or repair, so that the inspection work can be completed in the shortest time.
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(6) Verification conclusion
Once through the above steps, find out the cause of the failure of the injection molding machine, start troubleshooting. Mae datrys problemau yn cynnwys gwirio pwysau a llif gyda chyfarpar prawf priodol, dadosod y clawr casin, a gwirio pympiau, moduron a chydrannau eraill. Mae'r archwiliadau prawf hyn yn sail i farnu amnewid rhannau a chydrannau hydrolig. In actual work, yn aml nid oes dyfais brawf addas i gynnal arolygiadau. Ar y funud hon, mae angen disodli'r pwmp, modur, falf hydrolig a chydosodiadau cydrannau eraill fel ffordd effeithiol o ddatrys problemau. Yn y broses o ddarganfod a datrys diffygion, dylech fod yn ofalus, ofalus, gochel, ac ymdrechu i fod yn gywir, osgoi dadosod rhannau yn ddall, neu ddefnyddio dulliau amhriodol i ymdrin â diffygion, er mwyn osgoi niwed newydd a achosir gan hyn. Ac eithrio pan fo angen, peidiwch â dadosod y cydrannau hydrolig yn hawdd, because unnecessary and premature disassembly and assembly will reduce the service life of these components.

Dylai tymheredd gweithio delfrydol y system hydrolig fod rhwng 45 graddau a 50 graddau. Y rheswm yw bod y system hydrolig wedi'i chynllunio yn ôl gludedd olew pwysau dethol, ond bydd y gludedd yn newid gyda'r tymheredd olew, a fydd yn effeithio ar y gwaith yn y system. Cydrannau, megis silindrau olew, falfiau hydrolig, etc., lleihau cywirdeb rheolaeth a sensitifrwydd ymateb, yn enwedig ar gyfer peiriannau chwistrellu manwl gywir.
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Ar yr un pryd, os yw'r tymheredd yn rhy uchel, bydd yn cyflymu heneiddio'r sêl ac yn achosi iddo galedu a chracio; os yw'r tymheredd yn rhy isel, the processing energy will be consumed and the operating speed will decrease. Felly, mae angen rhoi sylw manwl i dymheredd gweithio olew hydrolig. Mae yna lawer o resymau dros y tymheredd olew uchel, ond mae'r rhan fwyaf ohonynt oherwydd methiant y gylched olew neu fethiant y system oeri.
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Insufficient oil will cause the oil temperature to rise easily, and the air will easily dissolve into the oil, which will affect the oil quality and the normal operation of the hydraulic system. Insufficient oil is usually caused by oil leakage or loss during repairs. Am y rheswm hwn, you should pay attention to check whether there is any leakage. If necessary, replace worn seals and tighten loose joints as soon as possible. After maintenance, check the amount of oil in the tank and replenish it in time.

One of the important properties of hydraulic oil is its chemical stability, hynny yw, oxidation stability. Oxidation is the most important factor that determines the effective service life of hydraulic oil. The insoluble matter such as wood tar, sludge and carbon residue generated by oxidation will contaminate the hydraulic system, increase the wear of hydraulic components, reduce various gaps, block small holes, and eventually cause The hydraulic system is malfunctioning.

The oxidation rate of hydraulic oil depends on many factors such as itself and working conditions, among which temperature is one of the main factors. Felly, it is necessary to use suitable hydraulic oil and regularly check the oxidation degree of the hydraulic oil (judged from the darker color of the oil itself) ), it is absolutely necessary to actively change the oil after a certain number of working hours.　　
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During the use of the peiriant mowldio chwistrellu, always check the pressure oil level, the pressure of the oil pump and the cleanliness of the pressure oil. When encountering wet weather, the concentration of the pressure oil must be checked daily, and the water pipes must be checked frequently to prevent water from being mixed in. In the pressure oil, the oil filter is blocked. Check the fuel tank frequently to keep it clean to prevent debris from falling in. Replenish pressure oil on time.
For the lubrication of the moving parts, the travel switch, the tightening of the screws, and whether the oil hoses and joints are leaking, they should be routinely checked once a week to keep them in good condition. If they are loose, they should be replaced or tightened.　　
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Yn ychwanegol, if a pressure oil is used for too long or too long, the pressure oil can be replaced, so as to extend the life of the oil switch, oil pump and sealing ring.