Current Testing For Safe Components
32Pages

... the FOERSTER Group component testing division Competence through innovative and worldwide presence Division CT is based in Dortmund. It develops and produces eddy current devices for non-destructive testing of metal components. From Dortmund, the sales department supports customers in more than 50 countries through subsidiaries and branch offices. FOERSTER Division CT in Dortmund Efficient testing of automobile components with eddy current The highly developed manufacturing technologies used in today’s automobile engineering require reliable and fully automatic quality control by...

Eddy current technology 4 Higher harmonic evaluation Crack detection with test 8/9 Material testing with test 10/11 PRODUCT TESTING COMPONENT TESTING METAL DETECTION MEASURING EQUIPMENT Piston rods/piston pins Valves/valve tappets Valve seat rings Cylinder bores Turned parts Axle pivots Brake discs Gearbox shafts Wheel hubs Ball pins Gear racks Drive shafts Valve seats

EDDY CURRENT TECHNOLOGY The eddy current technolgy The eddy current technology as per EN 12084 does not only detect material discontinuity and imperfections such as cracks, laminations, pores or cavities on the material surface. It also makes it possible to check materials for their properties to identify faults such as material mix-ups or differing heat treatment conditions. Some of the typical sorting criteria are alloy proportions, surface hardness, hardness depth, strength and microstructure characteristics. The eddy current technology is non-destructive and works without physical...

CRACK DETECTION Detecting cracks in the material For crack detection, the surface of the part to be tested is scanned without physical contact by one or more eddy current probes. For this purpose, the test item can be rotated by a mechanism adapted to suit the task and scanned by a stationary probe. Alternatively, a rotating probe can scan the stationary test item. The system can incorporate either one test track along the circumference with one probe only, or several test tracks with probes arranged in parallel. Alternatively, the surface of the part to be tested can be scanned with a...

MATERIAL AND MICROSTRUCTURE TESTING Checking materials for their properties For testing of material properties, the specimens are passed through an encircling testing coil. For special applications, e.g. for local checks for surface hardness or hardness penetration, sensor systems adapted to suit the specimen are provided. The voltage detected by the individual sensors results from the magnetic and electric properties of the specimen. The exact voltage is graphically displayed as a measuring point. Due to the statistical evaluation of several measured values, a sorting limit is...

M U LTI - FR EQ U E N CY T ESTIN G A N D HIGHER HARMONIC E VALUATION Multi-frequency testing Serial multi-frequency testing works with several different testing frequencies. The individual items of test information are subsequently determined with the defined frequency settings in a single testing procedure, which is automatically controlled by the testing system. The combination of several frequencies and magnetisation field intensities makes it possible to evaluate different material properties at the same time and/or to selectively suppress disturbance variables. As the tests take place...

CRACK DETECTION WITH TEST ELECTRONICS AND STATOGRAPH® The variable ECM multichannel solution provides a user-specific configuration in an industry-compatible 19“ instrument rack. The modular design provides capacity for extension, e.g. for magneto-inductive testing. Optimised protection of system components thanks to standard-fitted cooler with a closed cooling circuit. STATOGRAPH ECM Eddy current test device in modular design, for simple standard applications. The test classifications of the STATOGRAPH ECM are “good”/ “bad”. Inexpensive basic test device, fully capable of line operation,...

SENSOR SYSTEMS Testing probes for crack detection Fixed and rotary eddy current probes are used for crack detection on components. A comprehensive range of standard sensors is available for the most varied testing jobs. This way it is possible to design inexpensive solutions for typical testing functions. Special sensors If a testing job requires special solutions, FOERSTER designs and manufactures individual customised sensors. The range extends from adapting existing standard sensors through to completely rebuilding the sensor geometry. The picture shows probe elements adapted to specific...

MATERIAL TESTING WITH TEST ELECTRONICS AND MAGNATEST ® ECM Test device in modular design, for simple standard applications such as hardness testing or material identification. For mono-frequency testing with group analysis. PC interface. Can be extended with eddyAssist operating and visualization software. With MAGNATEST ECM CE the test module MAGNATEST ECM and the operating software eddyAssist are bundled in a compact unit. Especially if visualization of the test results is essential the MAGNATEST ECM CE is a suitable alternative. MAGNATEST ECM as well as MAGNATEST ECM CE can be extended...

SENSOR SYSTEMS Coils for testing of material properties According to the test arrangement, the sensors for testing material properties are designed as coils or as probes. The various MAGNATEST test devices are provided with a comprehensive range of standard testing coils with round and rectangular cross sections, as well as standard testing probes. Coils The clearance of the opening with through-type coils depends on the items to be tested. Depending on the shape and cross section of the test item, the coils can be changed, thus making it simple to convert the test systems for other...

The capability of separation at magneto-inductive testing depends on the test parameters, especially the test frequency and the magnetic field strength. The application assistant supports to get the optimum combination based on the preselected parameters and so reduces the amount of work significantly. • Step by step operator guidance for the optimization process • Calculation of the separation after collecting at least five good parts • Display of the optimum test settings after testing the part to be separated • Activation of the determined test parameters by the operator for the routine...