17 30 TOPIC13 INTODUCTION of Probes Accessories Required

17: 30 TOPIC-13 INTODUCTION of Probes & Accessories

Required Accessories 17: 30 1. Digital USFD Machine 2. 0˚ Normal Probe) Single/Double Crystal) 3. 70˚ Angle Probe (Singele Crystal/Double Angle) 4. 45˚ Angle Probe (Single Crystal) 5. 6. Cables for connecting Probes IIW Block 7. Calibration Block 8. 9. Standard Test Piece with artificial flaws Soft Grease/Thick Oil for Couplant

PROBE For Weld Testing For Rail Testing 00 Double Crystal Probe 4 mhz 700 Double Angle Probe 2 mhz 17: 30 0 00 0 70 45 450 Single Double Side S/C Horizontal/ Crystal Vertical/ Rig Testing Tandem Looking Hori. Longitudinal 0 Probe Transverse 45 S/C Probe Rig Defects 2 mhz Defect Probe 2 mhz (1 no) 2 mhz (1 Set) Star (Bolt Hole) Crack (1 Set) Horizontal Half Moon Vertical Defects Vertical/Transverse Defect Half Moon Vertical Longitudinal Defect Transverse Defect below Wheel Defects Burn/Scabbed Rail (By Side Probing) 700

PROBE 17: 30 Transducers (Crystal) which § It has is a Piezoelectric metallic housing containing the crystal, converts electrical signals into mechanical damping material, electrical leads & a Perspex face. vibrations (transmit mode) and mechanical vibrations into electrical signals (receive mode).

Classification of Probes 17: 31 Probes can be classified on the basis of – § Number of crystals : 1. Single crystal probes 2. Double crystal probes § Angle of wave transmission : 1. Normal Probe 2. Angle Probe § Frequency : 1. 2 Mhz 2. 4 Mhz

Classification of Probes 17: 31 § Normal probe (0˚ Probe) – Use Longitudinal waves 2 MHz – Single Crystal – For Characteristics checking of machine 2 MHz – Double Crystal – For Weld Testing 4 MHz – Double Crystal – For Rail Testing § Angle Probes (70˚ & 45˚) – Use Transverse waves 2 MHz – Single Crystal – For Weld Testing 2 MHz – Double Angle – For Rail Testing

0˚ Single Crystal Probe 17: 31 Power Supply Lead § Frequency 2 to 2. 5 Mhz Damping Material Acoustic Insulating Body Piezoelectric Crystal Matching Layer of Perpex § Used for Only Assessment or Characteristic Checking of Machine § As the Dead Zone of this Probe is more i. e. 5 to 7 mm.

0˚ Double Crystal Probe 17: 31 Power Supply Lead § Frequency 2 Mhz (For Weld Testing) § Frequency 4 Mhz (For Rail Testing) Damping Material Acoustic Insulating § Used During Weld Testing to detect the Horizontal defects in Head and Web Body upto Neutral Axis only. Transmitter Piezoelectric Crystal § And Acoustic Barrier § Used During Rail Testing to detect Matching Layer of Perspex the Horizontal Defects in Head , Web and Foot also. Receiver Piezoelectric Crystal

0˚ Double Crystal Probe (2 Mhz) 17: 31 § Used for Weld Testing. § Probing is done Manually by Hand. § Used to detect the Horizontal defect in Head and Web (Up to Neutral Axis only). To view the working of 0° Probe through the Animation Click on the Button

0˚ Double Crystal Probe (4 mhz) 17: 31 • Used for Rail Testing. • The Probe is fixed in Testing Trolley using Probe Holding Assembly and runs along with the trolley. 0˚Probe Holder • This probe is used to detect the Horizontal defect in Head, Web and Foot and Star Cracks (Bolt hole Cracks) also.

Angle Probe (Single Crystal) Norm a Prob l e Angle Probe Longitudinal Wave Cryst al Ø Ob ject Perspex Wedge angle Shear Wave Probe angle 17: 31

70˚ Angle Probe (s/c) 17: 31 § Used for Weld Testing. § Probing is done Manually by Hand. § This Probe is used to detect the Transverse defect in Head and Foot of Weld. To view the working of 0° Probe through the Animation Click on the Button RAJENDRA KHURSINGE, Sr. Instructor Track, IRICEN.

45˚ Angle Probe (s/c) 17: 31 § Used for Weld Testing. § Probing is done Manually by Hand. § Used to detect the Half moon defect in Foot. § A set of 2 probes is used in Tandem Rig to detect the Vertical Defects in Head web junction, complete web and Web foot Juction. § A set of 2 Probes is used in Rig Testing for wheel burn & scabbed rail to detect Transverse and vertical defect in Rail Head

70˚ Side Looking Probe 17: 31 § If unable to use the 45˚ Probe due to Bolt hole or any reason to detect the Half moon defect. § A set of 2 side looking probes is used to detect the Half moon defect.

Tandem Rig 17: 31 § It is a Device having a provision to run Two Probes in opposite direction and simultaneously at exactly equal distance. § Used for Detection of Vertical Defect in Web-Foot Junction, Complete web and Head-Web Junction.

Test Rig 17: 31 Locally made Test Rig Top View (134 mm for 52 kg Rail) (145 mm for 60 kg Rail) Side View § Used for detection of Transverse and Vertical longitudinal defects in Rail Head at the location of wheel burn, scabbed rail etc.

Test Rig 17: 31 Locally made Test Rig Top View (134 mm for 52 kg Rail) (145 mm for 60 kg Rail) Side View § It is a Device having a provision to run Two Probes at a fix distance simultaneously.

70˚ Angle Probe (Double Angle) 17: 31 Double Angle Probe Longitudinal Wave Object Shear Wave Probe angle RAJENDRA KHURSINGE, Sr. Instructor Track, IRICEN. Probe angle

70˚ Angle Probe (Double Angle) § Used for Rail Testing. § Probe is fixed in Testing Trolley using Probe Holding Assembly and it runs along with the trolley. § This Probe is used to detect the Transverse defect in Rail/Weld Head. Probe Holder 17: 31

Couplant 17: 31 For Weld Testing and other Special For RAIL Testing which require Hand Probing § Soft Grease of RDSO Specification No. Water WD-17 -MISC. -92 or WD-24 Misc. -2004 (WD stands for Water Displacement) or Any thick oil of high viscosity grade (having viscosity grade of 150 c. St or more) § A centistokes (c. St) is a decimal fraction of the CGS unit of kinematic viscosity stokes, (which is equal to cm²/s)

Introduction of Calibration Block 17: 31 60 mm 50 mm 100 mm 60 mm 50 mm

Introduction of Calibration Block 17: 31 § This calibration block can be used for calibration and characterization of Normal Probe only. • These are available in two sizes – (50 mm x 60 mm) & (50 mm x 60 mm x 100 mm) § These blocks are made of Carbon steel or Stainless steel.

Introduction of IIW Block 17: 31 § IIW – International Institution of Welding V-1 Block 25 m m 300 mm V-2 Block 10 0 25 mm m 50 m 100 mm 85 mm m m 91 mm 50 mm Ø and 23 mm thick Perspex 1. 5 mm Ø, hole 6 mm deep & 2 mm thick- Cut 15 mm 200 mm

Detailed Dimensions 17: 31 V 1 CALIBRATION BLOCK FRONT VIEW SIDE VIEW TOP VIEW REAR VIEW

Detailed Dimensions 17: 31

Introduction of IIW Block 17: 31 § This block can be used for all kinds of calibration and characterization. § Not only for normal probes and for angle probes also. § It is made from carbon or stainless steel with longitudinal wave velocity 5920 m/s and transverse wave velocity 3230 m/s. § It has a quadrant with 100 mm & 25 mm radius for characterization of angle-beam.

Introduction of IIW Block 17: 31 § The designations V 1 and V 2 have not of English but of German origin. (i. e. Vergleichskörper = Reference block). § The new abbreviations K 1 (for V 1 block) and K 2 (for V 2 block) were introduced. § some European languages do not use the letter C if it is pronounced like a K, therefore K 1 and K 2 represented for Kalibration (Calibration). § Perspex of 23 mm thickness is used in V 1 block is equals to 50 mm of steel, as Longitudinal wave velocity in perspex is 2730 m/s, so 23 mm x (5920/2730) = 49. 87 = 50 mm.

Introduction of IIW Block 17: 31 § IIW – International Institution of Welding V-2 Block 75 mm m m 43 m m 5 7 m m 5 20 mm 2 12. 5 mm 25 mm 50 mm 20 mm 1. 5 mm Ø, hole 25 m m 5 mm Ø, hole 50 m m 43 mm

Detailed Dimensions 17: 31 V-2 Block

Introduction of IIW Block 17: 31 § This calibration block can be used for on site checking of angle probe index, beam angle, calibration and sensitivity. § These are available in 12. 5 mm, and 25 mm thickness and with 1. 5 mm Ø and 5 mm Ø through hole respectively. § It has engraved reference mark scale from 35˚ to 75˚. § These blocks are made of Carbon steel or Stainless steel.