The breakdown of numerical control machine tool is diagnosed, processing and introduction of deal with problems arising from an accident

Principle of a barrier. Basically include the following fields: 1) phenomenon of sufficient investigation breakdown, be opposite above all the investigation of handlers, enquire the whole process of occurrence breakdown in detail, some what phenomenon arises, had adopted what measure to wait. Want to make meticulous survey to the spot next; 2) when the origin that searchs breakdown, train of thought wants to widen, no matter be compositive electric equipment, still mix mechanical, hydraulic pressure, want to cause the cause of this breakdown likely only, should list in the round as far as possible come. Undertake be judged integratedly and be optimizinged choosing next, produce the account of breakdown the most likely certainly; 3) first machinery hind is electric, principle of the trends after Xian Jing condition. Before corrective maintenance, should notice to remove mechanical trouble above all. Fall in moving condition again, the observation that has trends, examine and check, search breakdown. And of ruinous to can happening after electrify breakdown, after must eliminating risk first, square but electrify. 1.

2 breakdown diagnose a requirement. Besides substantial professional knowledge, need has the personnel that diagnoses exercise into breakdown of travel numerical control to start work certainly ability and practice operation experience, requirement staff member combines practical experience, be good at an analysis thinking, through analysing breakdown reason to the real operation of breakdown machine tool, accomplish with changeless should 10 thousand change, achieve the result of draw inferences about other cases from one instance. Complete maintenance tool and diagnostic appearance is indispensable, commonly used tool is like screwdriver, forceps, spanner, electric iron to wait, commonly used measuring instrument is like avometer, oscillograph, signal generator to wait. Divide this beyond, the staff member still needs to prepare necessary technical data, exactly the amount accuses manual of manual of parameter of system of blueprint of principle of machine tool electric equipment, structural composition blueprint, numerical control, maintenance, installation, operation, operation instruction handbook to wait. 2, the system of different numerical control of 　 of 　 of train of thought that breakdown handles devises an idea 1000 difference 10 thousand different, but no matter the sort of system, their fundamental and compose Chengdu are very similar. Because this is when machine tool occurrence breakdown, requirement maintenance technician must have the train of thought that clear breakdown handles: Survey breakdown scene, acknowledge nature of breakdown phenomenon, breakdown, answer to master breakdown information adequately, accomplish " much beat one's brains, careful start work " the broaden the scope that prevents breakdown. According to place control breakdown information makes clear the complex degree of breakdown, the full doubtful point of place of listed breakdown. Prepare necessary technical data, for instance machine tool manual, graph of electric control principle, analyse breakdown reason for the foundation with this, make the plan that removes trouble, requirement train of thought is open, should not be restricted breakdown bureau the some part at the machine tool. After plan of affirmatory trouble removal, use show avometer, oscillograph to wait measure a tool, the methodological test and verify that uses a test detects breakdown, chase place of breakdown of class fixed position, affirm a breakdown to attribute electric breakdown or mechanical failure, of the random still sex that is systematization, it is oneself breakdown or exterior breakdown are waited a moment. Of breakdown eliminate. The problem after finding breakdown reason normally is met the be readily solved on the horse. 3, the core place that the numerical control system of breakdown processing technique and machine tool of numerical control of 　 of breakdown citing 　 is numerical control machine tool, its move reliably, what matter to whole equipment to move directly is normal. Summary abstraction gives a few judgement and the method that eliminate breakdown of numerical control machine tool below. 3.

Exemple of 　 of 　 of 1 direct way 1: The boring of numerical control of 5 axes linkage that company of MAHO of a Germany produces milling machine, numerical control system is system of flying benefit riverside. In transmitting numerical control order, because processing is undeserved, will the transmission interface of CPU board is burned-out. Will CPU board is torn open below, careful observation, discovery has apparently anxious burnt mark in RS232 interface place. Careful observation falls in magnifier, jump the place that break a string afresh receive: Change a 8255 chip, newest installation comes on the machine tool, input of machine tool parameter, the machine tool returns to normal. Should CPU board moves all the time up to now, moving in order. 3.

2 analyse exemple of law 　 　 from diagnostic function 2: 16 meters when factory of heavy-duty machine tool produces a Wuhan establish a car greatly, appear suddenly in machining a process 43 call the police (PLC did not prepare the job) . Numerate the breakdown code in ISTACK 34, consult Xi Menzi 840C diagnoses manual, content is: Interface - DMP module starts a mistake. The examination includes all DMP module that holds unit inside, the DMP module motherboard that discovers join ground control panel does not have electrify. Consult the tripping operation of one air switch that electric blueprint discovery provides voltage for it, add up to its breakdown to disappear. 3.

Machine tool of numerical control of 　 of 　 of law of 3PLC program analysis is most, the most frequent breakdown cannot come true with respect to the certain and logistic function that is a machine tool. Need to combine electric principle plan right now, PLC program, the numerous data such as graph of hydraulic pressure principle undertakes an analysis, find out the reason that breakdown is in, to its the component undertakes maintain or changing, the job that makes numerical control machine tool returns to normal. Exemple 3: Still be the 16 Mi Dali cars that factory of heavy-duty machine tool produces the Wuhan that above paragraphs place says, discover X axis is the same as oil groove suddenly in use process a large number of outside excessive is oily. The examination is the same as oily circuitry and jam without discovery phenomenon, consult electric principle graph discovers those who offer oil to only X axis times lubricate and decide Cheng Run to slip two. With edit scene of PG720 of become a useful person real time monitoring, discover in PB10 the output that controls auxiliary relay 9KY50 nods Q11.

4 programs are as follows: PB1O paragraph AT40 of 　 of 　 of 5 　 　 : Lade LKT030 of 　 of 　 of T40 　 　 .

3; The time that sets T40 is SET41 of 　 of 　 of 300 seconds 　 ; To load comes ANT41 of 　 of 　 of T41 　 　 ; Lade LKT002 of 　 of 　 of T41 　 　 .

2: The time that sets T41 is SET40 of 　 of 　 of 2 seconds 　 ; To load comes CDB32 of 　 of 　 of T40 　 　 ; Call A of 　 of 　 of DB32 piece 　 (0D0.

10; X axis to athletic signal 0D0.

11; X axis is lost to athletic signal) AT40 of 　 of 　 　 　 ; Retroflexion 0T38 of 　 of control 　 　 ; Electrify control cheers lubricant =Q11.

4; Control 9KY50 relay the PLC pilot meaning of 　 　 here is sufficient when X axis moves, pair of output ask Q11 when using what T40 and T41 place do not have buy to retroflexion.

The 4 effects that have controlling already was achievinged timing lubricating. Monitoring PLC condition discovers logistic movement is normal, monitoring 9KY50 discovery undertakes completely outputting according to PLC programme controll, no matter PLC has,a powerful person of electromagnetism of reexamination hydraulic pressure discovers be in without output electromagnetism a powerful person often open position, sufficient also say any moment make oil. Tear open next 9KY50, measure with avometer, discovery often opens contact adhesion, change new auxiliary relay, trouble removal. 3.

4 replace exemple of law 　 　 4: The punching machine of 500 tons of programmed control that company of Wen Jiadeng of a Germany produces, of electronic cam controller. In using a process electronic cam controller calls the police, content is systematic breakdown, cause whole machine tool to break down. electronic cam implement tear open below, the circuit like discovering its itself has two board, and gules LED indicator light calls the police to shine on circuit board together, another completely normal, the breakdown after exchange produces move, proof among them a hardware has trouble, will two board tear open next discovery to share 8 to be able to unplug at the same time the chip that insert, exchange 4 among them, undertake comparative again, breakdown phenomenon did not produce move, again exchange the rest 2 chip, breakdown phenomenon produces move, go down to find out the chip that has a problem so far. But it is EPROM as a result of this chip piece, will good EPROM piece medium program is used those who write a machine to write place to buy with type EPROM piece, after installation, breakdown phenomenon disappears. Of this breakdown those who eliminate to be used completely is to replace a method, the limits of progressively and contractible breakdown, find out breakdown reason and try to eliminate. 4, trouble removal admits really reach 　 of 　 of job of deal with problems arising from an accident after trouble removal, maintenance work still cannot calculate finish, still need the depth that from technology and management breakdown of two respects analysis produces second reason, adopt proper measure to avoid breakdown to happen again. Can use mature technology to undertake transforming to equipment according to spot condition when necessary with improve. After period of time, ask the moving state of jockey machine tool, have comprehensive examination to trouble spot again. Do maintenance log finally, record the whole process of maintenance in detail, include to maintain time, change a model norms and breakdown case study. Discover oneself defective knowledge from inside eliminating breakdown in process, make study plan, enrich oneself finally. CNC Milling CNC Machining