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Expulsion detection system for resistance spot welding ...

Expulsion detection system for resistance spot welding based on a neural network PrimozPodrˇ ˇzaj, Ivan Polajnar, Janez Diaci and Zoran Kari zˇ Fakulteta za strojniˇstvo, Univerze v Ljubljani, A skerˇ ceva 6, 1000 Ljubljana, Sloveniaˇ E-mail: [email protected] Received 26 September 2003, in final form 6 January 2004

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(PDF) Understanding UT Testing - My ASNT self study .

Due to the geometry of many fillet welds, particularly those in which incomplete penetration is permitted, ultrasonic testing is usually not recommended. In other cases, such as stainless steel piping, ultrasonic inspection may be successful in the base material (a wrought product) but not in the weld zone (a cast product).

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4 Methods of Detecting Surface Defects in Carbon Steel

Jul 03, 2016· Dye Penetrant Inspection. Called DPI, liquid penetrant inspection (LPI), or penetrant testing (PT), this is a low-cost inspection method widely used to locate surface-breaking defects in non-porous materials (metals, plastics, ceramics). LPI is used to detect casting, forging, and welding surface defects such as hairline cracks, surface .

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Nondestructive testing of pitting corrosion cracks in ...

Nov 12, 2016· Then, the ultrasonic sensor is guided to the rivet center in order to inspect pitting corrosion cracks in the rivet. The magnetic sensor uses a 64-Hall sensor elements array with a 0.52-mm interval that can measure the rivet center position at a standard deviation of 0.27 mm and 0.42 mm in the scan .

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Phased Array Ultrasonic Testing of Dissimilar Metal Welds ...

Phased Array Ultrasonic Testing of Dissimilar Metal Welds using Geometric based Referencing Delay Law Technique Taeyoung HAN1, Kyounghee KIM1, Martin BARTH1, Andreas BRUSINSKY1, .

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Ultrasonic Inspection | Scientific.Net

In this work, an air-coupled ultrasound technique with focused transducers has been used for non-contact measurements of spot welds of steel plates. One-dimensional scanning in transmission configuration using a pair of focused air-coupled ultrasonic transducers operating with tone burst waves at 0.3 MHz is performed to obtain the amplitude ...

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ASNT NDT Library - 2019 Papers

Detection and classification of internal defects in limestone blocks based on a deconvolution technique with SI-PLCA applied to GPR signals. Publication Date: 1 November 2019 Publication: Research in Nondestructive Evaluation, Volume 30, Issue 6, pgs. 350 - 379

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NONCONTACTING ULTRASONIC SYSTEM FOR CONCURRENT .

The computer system for the ultrasonic sensor acquires and processes information from the EMAT and determines if the weld is of acceptable quality. Information about unacceptable weld is sent to the weld controller. The central processing unit of the ultrasonic sensor is a full-featured 80486 based PC/AT compatible with a clock speed of 25 MHz. The

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NextSpot 600 - NextNDT

NextSPOT Series NextSPOT 600 Phased Array Ultrasonic Spotweld Detector Real-Time Detect Multi-Channel Phased Array System 10.4″ Touchscreen Cloud Data Management View Specification Introduction NextSpot 600 ultrasonic flaw detector will handle all your spots weld NDT needs, whether it is in production lines or in field environments. The unit is constructed with an one piece all [.]

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Ultrasonic – Magnetic Analysis Corporation

The Echomac® FD-6 Multi Channel Ultrasonic Tester is a computer-based UT inspection instrument designed for on- or off-line flaw detection, thickness and dimensional measurement. As the use of nodular graphite iron material has expanded in recent years for automotive safety parts, ultrasonic velocity measurement provides an industry accepted ...

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Ultrasonic Inspection & Testing of Welds | JANX

Ultrasonic testing is a widely used non-destructive testing method that may be used for dimensional measurements, thickness, material characterization, flaw detection and more. Ultrasonic inspection may be utilized at any stage of an asset's lifecycle, ranging from inspection to plates, forging, castings, and welded components, to in-service ...

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Assessment of weld quality of aerospace grade metals by ...

Figure 7 show the color coded C-scan results of the resistance spot welded part shown in Figure 8. The weld diameter was estimated to be 5.6 mm and 5.5 mm for weld #5 and weld #6, respectively. (a)C-scan image of weld #5 (b) C-scan image of weld #6 Figure 7. Ultrasonic C-scan images of resistance spot welds with pores. Figure 8.

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Advanced NDT Services, PAUT, LRUT, Tube Testing, Heat ...

Ultrasonic thickness measurement (UTM) is a non-destructive measurement (gauging) of the local thickness of a solid element (typically made of metal, if using ultrasound testing for industrial purposes) basing on the time taken by the ultrasound wave to return to the surface. This type of measurement is typically performed with an ultrasonic ...

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Expulsion detection system for resistance spot welding ...

Applications of ultrasonic testing and machine learning methods to predict the static & fatigue behavior of spot-welded joints N. Amiri et al-A novel real-time measurement method for dynamic resistance signal in medium-frequency DC resistance spot welding Ze-Wei Su et al-Quality Estimation System for Resistance Spot Welding of Stainless Steel

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Sessie Inspection Monitoring | Belgian Welding Institute .

These carbon steel heavy section narrow gap welds have a welded stainless steel clad on the inside, from which the ultrasonic examination must be performed. The examination should cover the complete narrow gap weld volume and adjacent base material. Dedicated phased array probes were designed to provide the required detection and sizing ...

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Ultrasonic Testing (UT) | Scientific.Net

Abstract: In the ultrasonic detection of small-diameter steel pipe with thick wall, the quality of ultrasonic echo signals is the foundation for the pipeline flaw identification and feature extraction. In this paper,a de-noising method of wavelet packet based on threshold is .

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Nondestructive Testing Standards - ASTM International

Standard Practice for Contact Ultrasonic Testing of Welds Using Phased Arrays: E2904 - 17: Standard Practice for Characterization and Verification of Phased Array Probes: E2985 / E2985M - 14(2019) Standard Practice for Determination of Metal Purity Based on Elastic Constant Measurements Derived from Resonant Ultrasound Spectroscopy: E3044 ...

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DNVGL-CG-0051 Non-destructive testing

detection and sizing of discontinuities ... EN ISO 13588 Non-destructive testing of welds - Ultrasonic testing - Use of automated phased array technology ... Table 2 Informative references ASTM A609 / A609M-12 Standard Practice for Castings, Carbon, Low-Alloy, and Martensitic Stainless Steel, Ultrasonic .

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Ultrasonic C-scan imaging and analysis of the mechanical ...

The quality of spot-welded joints of 1 mm-thick SUS304 stainless steel sheets was investigated using scanning acoustic microscopy. C-scan images were used to characterize the weld evolution characteristics of welds formed under different welding parameters, and A-scan signals of feature regions were collected and analysed.

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Specifications NextSpot 600 - Home - NextNDT

Spot Weld Ultrasonic Flaw Detector NextNDT Technology, Inc. 1580 Oakland Rd, Suite C209, San Jose, CA 95131 USA ... • Stainless steel housing • Hard delay line Cabling • Length: 2m ... NextSpot 600 can provide A/C - scan and real-time display on spot weld. NextSpot 600 .

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Advanced Engineering Services - Eddy Current Testing ...

By using ultrasonic 'A', 'B' or 'C' scans on castings, forgings, composites and welds, we can detect defect indications to the most stringent inspection standards. Ultrasonic testing can also be used to measure the thickness of a wide range of metallic and non-metallic materials.

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How to Solve Common Ultrasonic Welding Problems | Plastics ...

May 31, 2017· Ultrasonic welding is a widely recognized and accepted process for joining thermoplastic materials. It offers many advantages, including process reliability and repeatability, .

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Method and system for assessing quality of spot welds ...

4/7/2009· A method of analyzing an A-scan ultrasound image to reduce the angular dependence of matrix transducer elements and improve C-scan image quality, wherein the ultrasound image represents a surface sample of a spot-weld joint, the method of comprising the steps of: locating the positions and amplitudes of surface peaks in the ultrasound image ...

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Weld Flaw Detection Using Various Ultrasonic .

Based on ultrasonic image, a new algorithm was proposed by the authors Corneloup et al. (1994) which combines spatio-temporal condition and permits the detection of small-sized defects in austenitic stainless steel welds. This algorithm ensures the detection of the defects with large dimensions or the defects located outside the weld.

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PPT – WELDING INSPECTION AND QUALITY CONTROL .

2. steel test blocks annealed type 201 0r 302 stainless steel. Sandblasted on one side only with 100 mesh average size grit, gun held at 18 at 60 psi to achieve velvety finish. 25. 3. aluminum test blocks type 2024 by heating to 975F and quenched to form cracks. Used to check comparison for operating out of the normal temperature range.

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Weld Quality Analysis Of TIG, Laser And Electron Beam ...

Ultrasonic testing procedure for the evaluation of weld quality. The details of system specifications of Ultrasonic test used are shown in Table 1. Table 1 : Specifications of the Ultrasonic equipments Used for Testing of welds Probe Range Ref. dB Scan dB Frequency Angle (700) 0-50 mm 50dB 56 dB 4 MHz TR probe 10mm dia 0-20 mm 45dB 51dB 4 MHz 4.

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An Introduction to Ultrasonic Thickness Gaging

ndt, panametrics-ndt, non destructive test equipment, ultrasonic transducers, ultrasonic sensors, non destructive testing, nondestructive testing, ultrasonic testing, gauge thickness, ultrasonic thickness measurements, crack detection, flaw meter, ultrasonic inspection, flaws detection, flaw theory, NDT theory, ultrasonic flaw detection ...

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Ultrasonic Testing Procedure - Inspection for Industry

The surface to be subject to ultrasonic testing shall be free from any existing lubricants, dirt, residue, rust and sharp edges, so; to smoothly carry on the procedure. 6. Equipments. 6.1- Examination shall be conducted with a pulse echo A-Scan ultrasonic testing instrument capable of generating frequencies over the range of at least 1 MHZ to 5 ...

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NextSpot 600 - NextNDT

NextSPOT Series NextSPOT 600 Phased Array Ultrasonic Spotweld Detector Real-Time Detect Multi-Channel Phased Array System 10.4″ Touchscreen Cloud Data Management View Specification Introduction NextSpot 600 ultrasonic flaw detector will handle all your spots weld NDT needs, whether it is in production lines or in field environments. The unit is constructed with an one piece all [.]

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(PDF) Understanding UT Testing - My ASNT self study .

Due to the geometry of many fillet welds, particularly those in which incomplete penetration is permitted, ultrasonic testing is usually not recommended. In other cases, such as stainless steel piping, ultrasonic inspection may be successful in the base material (a wrought product) but not in the weld zone (a cast product).

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WO2005108973A1 - Ultrasound phased array devices and ...

Contemplated configurations and methods are directed to non-destructive ultrasound testing of stainless steel materials, and especially materials in a difficult-to-reach position, in which a phased array probe is operated using longitudinal waves, wherein the probe is further operated at an angle that provides substantially complete ultrasound coverage when the beam angle is modified.

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(PDF) Guide for the Nondestructive Examination of Welds ...

AWS B1.10M/B1.10:2009 An American National Standard Approved by the American National Standards Institute July 1, 2009 Guide for the Nondestructive Examination of Welds 4th Edition Supersedes AWS B1.10:1999 Prepared by the American Welding Society (AWS) B1 Committee on Methods of Inspection Under the Direction of the AWS Technical Activities Committee Approved by the AWS Board of .

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