CUT-Z6S Automotive Spot Welding Flaw Detector

☆ Measurement range: 1-15000mm

☆ Operating frequency: 500~20000m/s

☆ Detection accuracy: 0.1mm

☆ Indication error: 0.01mm

Product Introduction

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Z6S： Let the senses fly freely The Z6S ultrasonic flaw detector with square wave technology combines performance, speed, professionalism, and portability, and can meet the flaw detection needs of special spot welding processes for vehicle bodies. The perfect integration of performance beyond the mainstream and the characteristics of Shuode products, honing skills through experience and having the courage to challenge limits. Sensitive feedback, superior performance, digital content simulation experience, and a comfortable feeling without clutter interference, it is like your sixth sense, moving with your thoughts. The Z6S ultrasonic flaw detector is more like a spot welding specialized testing workstation wrapped in a portable jacket, which will surely lead you to a higher level of testing.
	In the modern automobile manufacturing process, each sedan body is assembled from over 300 metal sheets with more than 3000 welding points. To ensure the quality of solder joints, we usually use two methods for product quality control: destructive testing (chiseling inspection; metallographic analysis) and non-destructive testing (ultrasonic testing). Nowadays, more and more manufacturers tend to use non-destructive testing, namely ultrasonic testing, to replace traditional destructive testing. This is mainly because the reliability of ultrasonic testing is increasingly accepted by manufacturers. The current spot welding inspection is manual offline inspection, mainly due to the inconsistent surface shape of the welding points, which cannot achieve online inspection during the welding process. When sound waves propagate in a metal plate, they are repeatedly reflected by the interface, generating a series of echo signals that are displayed on the instrument's screen. We can judge the quality of the solder joint based on the shape of the echo signal. For beginners, they often complain about the complex parameter settings of ultrasonic spot welding detection methods. This is understandable. In 1997, Germany held a "Spot Welding Inspection Technology Experience Exchange Conference", which was attended by almost all well-known automobile manufacturers. The conference affirmed the effectiveness of ultrasonic testing technology in the workshop, and the testing data and results are reliable. The results of system analysis also support this point. At the same time, the training of testing personnel is also highly valued. The German Welding Society (DVS) has issued a training and assessment manual for "Resistance Welding Quality Inspectors". A well-trained quality inspector and a unified assessment standard are essential prerequisites for the successful application of ultrasonic testing. characteristic Built in spot welding special process Suitable for quality inspection of resistance spot welding nuggets on steel plates with a thickness of 1mm or more, such as car bodies. Specialized high-frequency ultrasonic spot welding focusing probe Using imported high-frequency composite materials with a bandwidth of up to 20MHz, it has high detection sensitivity; A specialized probe process has been developed for detecting welding points caused by car noise, which has good process adaptability. Visual analysis of weld profile diagram AWS： American Welding Society standard AWS D1.1/D1.5 (Z6w Z8)
Welding nugget situation
Ultrasonic spot welding detection probe
Quality Assurance System Process for Spot Welding

Square wave excitation: suitable for difficult to penetrate composite materials The advanced adjustable square wave excitation technology in the domestic industry is suitable for various materials that are difficult to penetrate. A high-performance "square wave/pulse generator" with adjustable options, achieving a good match with the probe. For composite materials, castings, and thick plates with severe sound wave attenuation, it is particularly effective, with strong penetration and signal-to-noise ratio; And it has high resolution for detecting thin workpieces and composite materials. Narrowband filter bank On the basis of conventional broadband filtering, multiple commonly used narrowband filters have been added. By passing the signal through narrowband filters matched with the probe, a good signal-to-noise ratio can be obtained, greatly suppressing noise. (Achieve clutter free effect) The first domestically to achieve 10 bit high-precision AD sampling Long standby time: 10/20 hours, get rid of charging troubles		USB storage, plug and play The USB interface can be inserted into a USB flash drive without the need for a driver, supports hot plug and play, and is plug and play. Realize the storage and screen printing of flaw detection reports. QR code B-scan visually display defect location Equipped with the commonly used 2D color coded B-scan function in high-end flaw detectors. The B-scan function provides an image-based observation mode for defects, which can produce a good contrast effect and facilitate the analysis and judgment of defects. Through the grayscale/color palette, the degree of defect hazard can be automatically displayed, and real-time comparison and observation of A-scan waveform and B-scan image can also be achieved Large capacity data storage: 3200 data sets 5 intelligent DAC curves that comply with JIS and API standards Practical DGS Curve: Three Reference Types: Large Flat Bottom, Flat Bottom Hole, and Through Hole
DAC curve	DGS curve

Actual inspection effect diagram of car spot welding:

1、 Instrument and probe selection:
1. Instrument: CUT-Z6S Automotive Spot Welding Flaw Detector
2. Probe: Ultrasonic Soft Film Probe for Automotive Spot Welding



2、 Thin plate spot welding sample:
1. Thin plate spot welding sample thickness of about 2.0mm

(Sample 1) (Sample 2)
3、 Testing plan:
1. DN20 automotive spot welding ultrasonic probe connected to CUT-Z6S spot welding ultrasonic flaw detector
2. Enter probe specifications, adjust damping to match 200 Ω or 500 Ω, power "high"
3. Adjust the detection range to 30mm, adjust the sensitivity, and adjust the scanning delay (this time adjusted to 46mm)

4： Test Sample No.1:
1. Detect unwelded areas

2. Check the spot welding area, when the welding is good


5： Testing Sample No. 2:
1. Detect unwelded areas

2. Check the solder joint location, the solder joint is overheated (the waveform decays quickly)


6、 Identification of waveform defects in ultrasonic flaw detection for automotive spot welding