CNC lathe tool post fault analysis and repair
From:Taian Haishu Machinery Co.,Ltd. Updatetime:2016-4-11 13:06:47 Views：
Rest as an important configuration of nc lathe in the machine tool running work plays an important role in once failure may cause the workpiece scrap even chuck and tool post collision accident. In nc machine tool fault repair electrical co
Rest as an important configuration of nc lathe in the machine tool running work plays an important role in once failure may cause the workpiece scrap even chuck and tool post collision accident.In nc machine tool fault repair electrical control part of the fault phenomenon and changeful some complex fault phenomenon is not obvious to find difficulty is larger and mechanical parts and common machine tool is similar failures are relatively easy to eliminate.When you in finding the cause of the problem at the same time find both comprehensive mechanical and electrical.
Rest in knife does not reach the designated position or fault phenomenon and the reasons of the tool rest can't lock
The following in GSK980TD CNC system (guangzhou) system equipped lathe as an example to illustrate:
The lathe in machining cylindrical external circular knife suddenly appear "Mr. Knife" to the operator press the "reset" button after return reference point check: first check tool is loose or damaged after checking tools in good condition;Too much second check whether the workpiece blank allowance is measured in accordance with requirements;Because it is the way in which certain processing program there will be no problem;So operators and suspect may be "tool compensation value" correction after renewed knife "tool compensation value" is the original;Hard to find out the cause of the problem for the moment.
Operator after the machine tool system is reset to the clamping a workpiece running normal test results.In continuous processing after several artifacts suddenly appear the same fault again after the above series of check the cause of the problem is still not found out finally to professional maintenance personnel after communicate with operator maintenance personnel results first measuring machine system input voltage and current are normal suspect may be mechanical failure.
And manual test mobile horizontal dragging plate, start the spindle, rotate tool rest in continuous manual tool rest when suddenly found rest some loose in the process of machine tool operation does not automatically lock is tool holder system fault but does not show after a failure in the process of machining mechanical failure "alarm" and must be rest.
Maintenance personnel after removal found inside the tool post by describing a spring positioning pin fracture (nc electric 4 Labour party inside the head is equipped with four spring positioning by pin) when the blank in the process of machining allowance for larger or high hardness tool post rotation to a station not broken spring positioning by pin bearing tool rest can automatically lock cutter turning normal when fracture of head rotation to a certain stage spring positioning pin head cannot automatically lock when the force is too large when turning the above problems.
Fault handling
Machine tool maintenance personnel overhaul the tool post after the electric controlling part belongs to the normal mechanical failure after replace broken by describing spring positioning pin is installed after the tool post test failure get out again.
Rest continuous operation or fault phenomenon and reason of the tool continuously
Below to equipped with DTM system (emperor) horse nc system of a lathe as an example to illustrate:
Occasionally appear in the process of automatically run the lathe tool rest the phenomenon of continuous operation or a tool to keep sometimes continuous operation after 2 ~ 3 tool is stalling lock again.When continuous operation or a tool to keep the number "301" alarm to appear on the screen (tool post fault) machine to run automatically stop when continuous operation after 2 ~ 3 tool stalling lock number does not show alarm machine running automatically.
Fault is due to the randomness of irregular so not easy to find the maintenance personnel decision after the inspection, belongs to the electrical control failure.After the tool post control system output voltage measurements normal testing tool post relay control system is normal.Finally opened the cover at the top of the head is measured by the root signal input voltage hall element found 1 piece middle copper core fracture line temporarily are connected by a wire protection rubber skin when head to a certain position wire protection rubber bearing the taut on both ends of the copper wire can't normal through program control system cannot find the corresponding knife, appeared "301", call the police.After the machine reset manually turns head to a certain position wire protection rubber skin relax on both ends of the copper wire through tool rest rotation is no longer present normal alarm number.
Fault handling
After maintenance personnel will hall element connection signal lines to replace after commissioning fault eliminated machine running normally.
Comprehensive analysis of the above two cases of failure to find and eliminate process we can clear the numerical control machine tool fault not just happening in electrical part may also occur in mechanical part.For CNC lathe equipped with more than two kinds of systems are half closed loop control system does not have the mechanical fault feedback function during operation to strengthen the daily maintenance and maintenance after failure if not shown "alarm" probably belongs to the mechanical fault maintenance is the focal point to check the mechanical part it will be more accurate for the maintenance personnel troubleshoot, faster.
