CNC machining center collision machine, bayonet tool stuck how to do?

There are two common types of tool change modes in ATC of machining center

The first is that the tool is directly exchanged from the tool magazine by the spindle, which is suitable for small machining centers. The tool magazine is small and there are few tools. The tool change action is simple. It is easy to find and eliminate the tool drop fault in time.

The other is to exchange the tool between the spindle and the tool magazine by the manipulator, which is a kind of complicated structure and action.

After years of use, it is inevitable that the machining center fails. Knowing where the problem is and how to solve it is the key point.

In the process of using the machining center, if the tool cannot be released, there are usually the following situations:

Cause of failure:

Tool release solenoid valve damaged

The tool release cylinder of the spindle is damaged

The main shaft spring is damaged

Spindle claw damaged

Insufficient air supply

Poor contact of knife release button

Broken line

The oil cup of loosening knife cylinder is short of oil

Customer toolholder Latin does not meet the required specifications

Troubleshooting:

Check the action of the solenoid valve, the action of the tool release cylinder, the damage degree of the spring, whether the main shaft claw is in good condition, detect the damage degree of the button and whether the replacement line is broken. If there is any damage, replace it immediately.

Common faults and maintenance of automatic tool changer

Handling method of tool magazine's disordered tool

Cause of failure:

1) PMC parameter missing or system memory value inconsistent with the actual

2) Disassembly and repair of tool changer

3) Operator misoperation

Specific treatment method:

1) Manual mode makes the magazine return to the original position

2) Through the PMC parameter screen of the system, the tool magazine counter is initialized to 23.

3) In MDI mode, the actual tool is sent back to the tool magazine.

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Treatment of tool jam during tool change

In brief, there are two cases of tool magazine at the beginning. One is that the tool is not pulled out, and the other is that the tool has been pulled out. The first case is relatively better solved. We mainly introduce the solution of the second case.

1) Loosen the brake device on the motor and use a spanner 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 for automatic tool change is separated from the spindle of the high-speed vertical machining center.

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 spindle is in the state of loosening the tool. This should be noted that - something must be padded on the tooling, and the tool will fall at this time.

3) Please rotate the arm until the arm has completed a complete tool change. The tool arm also has an origin position. In the tool magazine panel, there are three red lights inside. Generally, the one in the middle is the indicator light that the tool arm is at the origin position.

4) After removing the initial fault, move the brake device of the cutter arm motor back to the original position, and then carry out the tool change action under the MDI state of the high-speed vertical machining center to see whether it is normal. If it is normal, please remember to check all the tools to be used in the processing, and carry out the processing under the condition of ensuring safety.

The spindle's stopping position is incorrect. The usual way of dealing with this problem is to eliminate the instability of spindle rotation signal first, then adjust the angle of the spindle's Quasi stop so that the key of the spindle holder is aligned with the keyway on the manipulator (adjusted by the tool changing macro program).

During the tool change process, it stops and sends out the tool change timeout fault alarm

1) According to the sequence diagram of tool change action, find out the steps to be taken in case of tool change failure

2) With the help of the signal change of the system ladder diagram, it is found out whether the previous action has not ended or the next action has not started when the fault occurs

3) Discrimination of mechanical fault or electrical fault

4) After troubleshooting, manually turn the manipulator motor to make the manipulator return to the original position

3. Abnormal sound during three axis operation

Cause of failure:

1) There is something wrong with the bearing

2) The generatrix of screw rod is unbalanced with the guide rail

3) Serious wear of wear-resistant plate leads to serious scratch of guide rail

4) Servo motor gain mismatch

Troubleshooting:

1) Replace the bearing

2) Calibration screw bus bar

3) Re attach the wear-resistant plate, and deal with it again when the rail scratch is too serious

4) Adjust the servo gain parameters to match the machine

CNC machining center accuracy problem is a daily problem that perplexes our processing operations, and the causes of accuracy error are often difficult to investigate. Finally, list some common problems and the reasons for these problems, so that we can take the right medicine to the case

The workpiece size is accurate, but the surface finish is poor

Causes: the tool tip is damaged and not sharp; the machine tool resonates and is not placed smoothly; the machine tool crawls; the processing technology is not good.

Large and small taper head of workpiece

Causes: the level of the machine tool is not adjusted well, one high and one low, resulting in unstable placement; when turning the long shaft, the contribution material is relatively hard, and the cutting tool is relatively deep, resulting in the phenomenon of giving way to the tool; the tailstock thimble is not concentric with the spindle.

The driver phase light is normal, and the size of the workpiece processed is large or small

Cause: the carriage of the machine tool runs at high speed for a long time, which leads to the wear of the screw rod and bearing. The repeated positioning accuracy of the tool carrier has a deviation in the long-term use. The carriage can return to the processing starting point accurately every time, but the size of the processed workpiece still changes. This phenomenon is generally caused by the spindle, the high-speed rotation of the spindle makes the bearing wear seriously, resulting in the change of machining size.

Translated by Robots