Ultrasonic mold in the work there will be a certain fever, which is due to the mechanical loss of the material itself and weld heat conduction caused. Welder fever is normal to determine the standard without load (that is, not in contact with the workpiece), the continuous emission of ultrasound more than half an hour, the temperature can not exceed 50-70 ℃, such as fever calendar damage, that the welding head has been damaged or unqualified material, Need to be replaced.
When the ultrasonic mold when the whistle, you should analyze the following reasons:
① mounting screws have been loose
② whether the welding head cracks
③ welding head and should not touch the object contact.
When the generator sends an overload alarm, it should be checked as follows:
No-load test, such as the normal operating current, it may be ultrasonic mold contact should not touch the object or welding head and welding parameters between the adjustment failure.
No-load test is not normal, should first observe the welding head is cracked, the installation is solid, then remove the welding head and then no-load test to rule out whether the transducer + horn problems, step by step to exclude. Exclude the possibility of transducer + horn failure, the new ultrasonic mold change to judge.
Sometimes there will be no-load test is normal, but not working properly, there may be ultrasonic molds and other acoustic energy within the original changes, resulting in poor transmission of sound energy, there is a relatively simple method of judgment: hand touch method. Normal work of the horn or horn surface when the amplitude is very uniform, the hand is velvety smooth touch, when the sound energy transfer is sluggish, the hand will feel there will be bubbles or burrs feel, then It is necessary to use exclusion to rule out the problem components. When the generator is not normal, the same situation can occur because normally the transducer input waveform should be a smooth sine wave, which can also occur when there is a spike or unusual waveform on the sine wave, At this time can be replaced with another pruning sound element to determine.