How does occurrence breakdown of main shaft of the machine tool in routine do?
source:SHNMIN CNC Machining
What machine tool main shaft points to is the axis that workpiece or cutting tool drive to rotate on the machine tool. Mix by main shaft, bearing normally transmission (gear or belt annulus) wait for component of compositive main shaft. Basically use spare parts of the transmission that prop up to be like gear, belt annulus in the machine, deliver motion and torque, be like machine tool main shaft; Some uses the work that hold clip, be like arbor. In applying actually, basically have main shaft of two kinds of high speed: One kind is the main shaft of high speed report that has 0 drive, because this kind of main shaft uses the structure of electric machinery and unifinication of machine tool main shaft, pass meticulous dynamic balancing corrective, because this has good circumgyrate precision and stability, but restrict somewhat to the torque of output and power. Another kind is the main shaft that is united in wedlock with electric machinery of frequency conversion main shaft and photograph of mechanical gearshift orgnaization. The torque that this kind of main shaft outputs and power should be gotten greatly much, but opposite for stability of circumgyrate precision peace wants all but, accordingly to this kind of main shaft, the influence that how designs machine tool main shaft and its component correctly to machine precision to the machine tool is crucial. Main shaft needs to often maintain, such ability assure the stability that the machine tool machines and precision. Main shaft is in treatment process, can produce high temperature, drop the working temperature of bearing, the method that often uses is lube. Lubricant means has, oil gas is lubricant means, oily fluid lubricates circularly two kinds. Want to notice the following when using these two kinds of means: 1, when using oily fluid to lubricate circularly, want to make sure the oily capacity of gasoline tank of main shaft constant temperature is enough and sufficient. 2, lubricant means just mixes oil gas oily fluid loop is lubricant and contrary, it wants size of fill bearing space only 10% can. The advantage with circular lubricant type is, below contented and lubricant circumstance, can reduce attrition to give out heat, and can give the one part quantity of heat of main shaft component absorb. To main shaft lubricate to likewise two kinds put type: Oily mist is lubricant means and spray are lubricant means. Small make up also arranged the breakdown with common main shaft of machine tool of a few numerical control and means of settlement for everybody, encourage with gentleman. One, the main shaft that does not take frequency conversion does not turn, breakdown reason and processing technique: 1, mechanical drive breakdown causes: Examination belt-conveyor has without rupture or whether did the machine tool hang neutral. 2, the three-phase power source of supply main shaft is short of photograph or instead: Check power source, exchange holds the post of two power supply cord. 3, circuit join mistake: Consult circuit joins seriously manual, ensure even the line correct. 4, the system controls signal to output without corresponding main shaft: Measure systematic signal to output end with avometer, if do not have main shaft to control signal to output, need to change relevant IC yuan parts of an apparatus or maintenance sending a plant. 5, the system has corresponding main shaft to control signal to output, but power source supply line and existence of circuitry of control signal output open circuit or be attaint of yuan of parts of an apparatus: Check the return of power source supply between system and main shaft electric machinery with avometer, signal control loop is put in open circuit; to be put in open circuit; to whether contact even the contact of space undesirable; to communicate contactor each, dc relay has attaint; to check hot relay to whether shed; to check insurance canal too whether burn down. 2, the main shaft that takes transducer does not turn, breakdown reason and processing technique: 1, mechanical drive breakdown causes: Examination belt-conveyor has without rupture or whether did the machine tool hang neutral. 2, the three-phase power source of supply main shaft is short of: Check power source, exchange holds the post of two power supply cord. 3, the transducer control parameter of numerical control system did not open: Consult systematic manual, know frequency conversion parameter and change. 4, the circuit join of system and transducer is wrong: Consult the manual connecting a line of system and transducer, ensure even the line correct. 5, imitate voltage output is abnormal: Whether normal; checks the imitate voltage that checks systematic output with avometer imitate voltage line joins the contact is undesirable, whether does the imitate voltage that transducer receives match. 6, strong report control opens circuit partly or yuan attaint of parts of an apparatus: Power supply of examination main shaft road of this a gleam of each contact join is reliable, circuit has deny open circuit, whether does dc relay damage, insurance canal is burned-out. 7, transducer parameter not mix up: Control means is contained to choose inside transducer, cent controls main shaft fashion for transducer face plate, NC system controls main shaft means to wait, if do not choose NC system to control fashion, cannot control main shaft with the system, revise; of this one parameter to check relevant parameter the setting is reasonable. 3, the main shaft that does not take frequency conversion (shift gear main shaft) rotate speed is not controlled, breakdown reason processing technique: 1, the system outputs without the control signal of S01- S04: Inspection system has without shift gear control signal output. If not have, it is systematic breakdown, change IC or maintenance sending a plant. 2, jumper road breakdown: If the system has,shift gear control signal output, check each link line to whether existence opens circuit or be contacted undesirable, whether does the examination sheds relay continuously or communication contactor damage. 3, attaint of main shaft electric machinery or short circuit: Check main shaft electric machinery. 4, machinery did not put into gear: Hung up archives. 4, main shaft does not have apply the brake, breakdown reason processing technique: 1, unusual or circuit of apply the brake is strong report yuan attaint of parts of an apparatus: Examination bridge piles, fuse, communication contactor damages; checks strong report loop to whether open circuit. 2, time of apply the brake is not quite long: Adjust the parameter of time of apply the brake of system or transducer. 3, the system outputs without signal of apply the brake: Change in-house yuan of parts of an apparatus or maintenance sending a plant. 4, transducer controls parameter not mix up: Consult transducer operation instruction handbook, set transducer parameter correctly. 5, after main shaft is started, stop instantly, breakdown reason processing technique: 1, time of systematic output pulse is insufficient: The M code that adjusts a system exports time. 2, transducer is in a dot to use position: Consult the operation instruction handbook of transducer, set good parameter. 3, of main shaft circuitry control yuan of parts of an apparatus to damage: The each contact contact on examination circuit is good, examination dc relay communicates contactor to whether damage, cause touch a head not to lock up oneself 4, short circuit of main shaft electric machinery, cause hot relay to protect: Search short circuit account, make heat up relay restoration. 5, control loop did not take main shaft to lock up circuit oneself, and output parameter setting for pulse signal, make main shaft cannot run normally: Open what the system controls main shaft stop parameter instead n to control fashion. 6, main shaft roll cannot stop, breakdown reason processing technique: Communicate contactor or dc relay to damage, suck for long close, uncontrollable: Change to communicate contactor or shed relay continuously. 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