ME3192 METROLOGY AND INSTRUMENTATION LABORATORY

Transcription

1 ME19 METROLOGY AND INSTRUMENTATION LABORATORY FORMAT FOR TABULAR COLUMNS - CYCLE 1 Batch 1 Expt 1 FIT BETWEEN NUT AND BOLTS Table 1: Order of specimens for different parameters Sl No Parameters Order 1 Increasing Minor diameter < < < < 8 < Increasing Effective diameter < < 8 < < < Increasing Tightness < < 8 < < < Table : Result of inspection with gauges Sl No Specimen No GO NO GO 1 1 goes Does not go Table : Values of parameters for different specimens Sl No Specimen No Effective Minor diameter / mm Thread angle Pitch / mm diameter /mm using UMM Effective diameter / mm using TWM Effective diameter / mm using TPM º 8' Batch 1 Expt MEASUREMENTS IN UMM Parameters Table 1: Parameters measured in UMM for specimen No. Specimen Axis Initial Final Result Pitch /mm X mm Minor diameter / mm Y mm Effective diameter / mm Y mm Thread angle / o 199º 0' 0º 18' 0º 8'

2 Batch Expt DETERMINATION OF STRAIGHTNESS ERROR USING AUTO COLLIMATOR Position Table : 1 Observations and calculation of straightness error using Auto collimator Autocollimator mean Difference from first Rise or fall over 0 mm base length Cumulati ve rise or fall Adjustment required Error mm Minute & seconds seconds seconds μm μm μm μm ' 0'' ' 18.8'' '.'' ' 9'' ' 8'' '.'' '.'' '.'' '.'' '.8'' Batch Expt DETERMINATION OF STRAIGHTNESS ERROR USING SPIRIT LEVEL Position Table 1: Observations and calculation of straightness error using Spirit level Spirit level Spirit level x0.0 Difference from first Rise or fall over 00 mm x 0. Cumulative rise or fall Adjustment required Error mm Divisions mm/m mm/m mm mm mm mm Batch Expt 8 DETERMINATION OF RELATIVE HUMIDITY Dry bulb temperature Wet bulb temperature Table 1: Observations and result 0.º C º C Humidity ratio ( from psychrometric chart ) Relative humidity ( from psychrometric chart ) 0 %

3 Batch Expt 9 CALIBRATION OF PRESSURE GAUGE Table 1:Pre-experimental plan Standard order Pressure / kg/cm Random No Table : Observation table Pressure y i /kg/cm Dead weight /kg Pressure x i ŷ i y i -ŷ i x i -ŷ i x i -y i /kg/cm

4 Batch Expt 10 CALIBRATION OF DIAL GAUGE Table 1: Sequential run order Observations and calculation y i /mm tester x i /mm Estimated value ŷ i Residual error y i -ŷ i Total error y i - x i Correction x i -ŷ i x i -y i Table : Randomized run order - preexperimental plan - Standard order Random number y i /mm Table : Randomized run order Observation table y i /mm tester x i /mm Estimated value ŷ i Residual error y i -ŷ i Total error y i -x i Correction x i -ŷ i x i -y i

5 Batch Expt 11 CALIBRATION OF HEIGHT MEASURING DEVICE Standard order Table 1: Pre-experimental plan Gauge Block Random number x i /mm Gauge Block applied x i /mm Table : Observations and calculations Device y i ŷ i y i -ŷ i x i -ŷ i x i -y i /mm

6 Batch Expt 1 INTERNAL DIAMETER MEASUREMENT USING SLIP GAUGE AND ROLLERS Table 1: Observations Trial No Slip Gauge used / mm Stack dimension / mm Result GO / NO GO GO NO GO GO Batch Expt 1 INTERNAL DIAMETER MEASUREMENT USING THREE PIN MICROMETER Table 1: Observations Sl No Main scale /mm Vernier scale Diameter /mm Average: Standard uncertainty: Batch Expt 1 INTERNAL DIAMETER MEASUREMENT USING BORE DIAL GAUGE Table 1: Observations Sl No Size of anvil /mm Bore dial gauge Internal diameter /mm Average: Standard uncertainty:

7 Batch Expt 1 STRAIN GAUGE LOAD CELL Table 1: Preexperimental plan Standard order Input Random number Table : Observations and calculation Loading W / g Input W+We / g Strain indicator Strain x i x10 - Stress y i / Mpa ŷ i / Mpa y i -ŷ i / Mpa Table :Comparison of s for different bridge arrangements with same load Bridge type Load / g Input / g Strain Strain / 10 - Full bridge Half bridge Quarter bridge

8 Batch Expt 1 ULTRASONIC FLAW DETECTOR Table 1: Observations Hole Depth / mm 1