Seamless Titanium Tube Automatic Inspection Machine Structure

The probe is installed in a probe cart, and a secondary spring push mechanism is selected to maintain a certain distance between the inspection probe and the surface of the inspected workpiece. From the test results, the probe's responsiveness is relatively strong, basically ensuring the stability of the distance between the probe and the surface of the inspected seamless titanium tube, and the inspection has achieved good results. Generally, the methods for handling the water coupling layer include: fixing the water tank box and the non-dispersive water spray equipment. Due to the use of the titanium tube rotating probe method, the length of the seamless titanium tube is generally around 10 meters. Therefore, it is necessary to consider using non-dispersive water spray equipment, such as increasing the diameter of the flow outlet, reducing the height of the flow outlet and the titanium tube, and reducing the water splashes. The current common handling methods can only be like this, but the handling effect is within the acceptable range.

The methods for handling the lift-off effect mainly include: the mechanical tracking method of the probe, the bridge connection method of the probe coil, changing the capacitance value of the LC loop of the detection coil, and using multi-frequency detection technology, etc. Except for the mechanical tracking method, the other several handling methods can be achieved by improving the probe and the instrument, but the mechanical tracking can only improve the probe frame to avoid the change of the lift-off gap. In practical industrial applications, the probe mechanical tracking method is the most commonly used method to overcome the influence of the lift-off effect.

There are two common forms of probe mechanical tracking:
One is to adopt the method of combining roller limit and cylinder or spring push to maintain a stable distance between the inspection probe and the surface of the inspected workpiece. Of course, this method can have a better effect in controlling the lift-off effect, but it will also increase the oscillation noise.

The other is to adopt the probe mechanical tracking method, which uses a ranging probe to timely measure the fluctuation of the lift-off gap and uses the ranging signal to control and drive the stepper motor and other power equipment to move the inspection probe, to ensure the stability of the gap between the probe and the inspected workpiece. This method is suitable for planar scanning and inspection of plates or billets, and the disadvantage is that the response speed of the probe and the instrument is relatively slow and complex.

In active inspection, the lift-off effect and the non-dispersive coupling layer have often become the most troublesome issues. In active inspection, the lift-off effect and the non-dispersive coupling layer are the main reasons for missed detection and false alarms. Whether it is missed detection or false alarm, it affects the reliability of the detection.

For a long time, in the practical application of active inspection, the problem that the detection reliability decreases due to lift-off vibration caused by the water coupling layer thickness change has always been a "bottleneck" that confuses the normal application of this technology.