The automatic tool changer (ATC) of the Machining Centre in Cnc 1370 has two common types of tool change methods:
One is that the tools are directly exchanged from the tool magazine by the spindle, which is suitable for small machining centers. The tool magazine is small, there are fewer tools, and the tool change action is simple. It is easy to find and eliminate the faults such as tool dropping.
The second is to rely on the manipulator to complete the exchange of the tool on the spindle and the tool magazine, which is a more complicated one in terms of structure and action.
After many years of use, it is inevitable that the machining center will malfunction. Knowing where the problem is and how to solve it is the key.
During the use of the machining center, if the tool cannot be loosened, there are usually the following situations:
cause of issue:
Broken knife solenoid valve
Spindle loosening cylinder is damaged
Spindle spring is damaged
Spindle claw is damaged
Insufficient air supply
Poor contact of the knife release button
Broken line
Lack of oil in the oil cup of the knife cylinder
Customer tool handle Latin does not meet the required specifications
Troubleshoot:
Check the action of the solenoid valve, the action of the loosening cylinder, the damage of the spring leaf, whether the main shaft pull claw is intact, check the damage of the button, whether the line is broken, and replace it immediately if it is damaged.
Common faults and maintenance of automatic tool changer
Trouble shooting method for disordered tools in tool magazine
cause of issue:
1) PMC parameters are lost or the system memory value does not match the actual
2) Disassembly and repair of tool changer
3) Misoperation by the operator
Specific treatment method:
1) Manually return the tool magazine to its original position
2) Through the system PMC parameter screen, the tool magazine counter is initialized to 23.
3) In the system MDI mode, send the actual tool back to the tool magazine. Need to install software Need software to add group
Handling of stuck tool during tool change
To put it simply, there are two situations at the beginning of the tool magazine, one is that the tool has not been removed, the other is that the tool has been removed, and the first one is relatively well resolved. We mainly introduce the solution for the second one.
Cutter during processing
1) Loosen the brake device on the motor, and use the adjustable wrench to rotate the outer hexagon on the motor. Generally, the direction of rotation is the same as that of the tool arm. In short, the tool arm of the automatic tool changer is separated from the high-speed vertical machining center. Spindle.
2) When the tool arm is separated from the spindle, if there is a tool on the spindle, the air leakage sound can be heard, that is, the state of the spindle when the tool is loosened. The occurrence of the fall situation.
3) Please keep rotating the tool arm until the tool arm has completed a complete tool change action. The knife arm also has an origin position. In the tool magazine panel, there are 3 red lights inside. Generally, the one in the middle is the indicator light that the knife arm is at the origin position.
4) After troubleshooting the initial fault, turn the brake device of the tool arm motor back to the original position, and then perform the secondary tool change action in the MDI state of the high-speed vertical machining center to see if it is normal. If it is normal, please remember to process All the knives to be used are checked again, and the processing is carried out under the condition of ensuring safety.
The spindle's exact stop position is incorrect-common handling method: firstly eliminate the fault that the signal of one rotation of the spindle is unstable, and then adjust the spindle's exact stop angle so that the key of the spindle tool holder is aligned with the key groove of the manipulator (adjusted by the tool change macro program) )
Stop during tool change and issue tool change overtime fault alarm processing
1) According to the timing chart of the tool change action, find out that the first step is executed when the tool change is faulty
2) With the help of the signal change of the system ladder diagram, find out whether the previous action did not end or the next action did not start when the fault occurred
3) Judging whether it is a mechanical failure or an electrical failure
4) After troubleshooting, the manual disc manipulator motor makes the manipulator return to the original position
Abnormal sound during three-axis operation
cause of issue:
1) The bearing is faulty 2) The screw bus bar and the guide rail are unbalanced 3) The wear plate is severely worn and the guide rail is severely scratched 4) The servo motor gain does not match
Troubleshoot:
1) Replace the bearing 2) Correct the screw bus bar 3) Re-attach the wear-resistant sheet, and re-treat if the guide rail is too severely scratched. 4) Adjust the servo gain parameters to match the machine.
Machining center overtravel failure
Accuracy problems of CNC machining centers are a daily problem that plagues our machining operations, and the causes of accuracy errors are often difficult to troubleshoot. Finally, list a few common problem cases and the reasons for such problems, so that everyone can prescribe the right medicine:
The size of the workpiece is accurate, but the surface finish is poor
Reasons: the tool tip is damaged and not sharp; the machine tool resonates and the placement is not stable; the machine tool has crawling phenomenon; the processing technology is not good.
The phenomenon of taper and small head on the workpiece
Reason: The level of the machine is not adjusted properly, one high and one low, resulting in uneven placement; when turning the long axis, the contribution material is harder, and the tool eats deeper, causing the tool to give way; the tailstock thimble is not concentric with the spindle.
The drive phase light is normal, and the size of the processed workpiece is sometimes large and sometimes small
Reason: Long-term high-speed operation of the machine tool carriage causes the screw and bearing to wear, and the repeated positioning accuracy of the tool holder produces deviations during long-term use. The carriage can accurately return to the starting point of processing every time, but the size of the workpiece still changes. This phenomenon is generally caused by the main shaft. The high-speed rotation of the main shaft causes serious wear of the bearing, leading to changes in machining dimensions.
