CBC4320Residual deformation tester for steel bars

1、 Main indicators of residual deformation tester for steel bars:

1Meet the standards:JGJ107-2016Technical specification for mechanical connection of steel bars

2Calibration instrument:GWB-200BHigh precision extensometer calibrator (range)0～25mm, Resolution0.0002mm） Steel Research Institute Manufacturing

3Measure the diameter of steel bars（mm）：φ5～φ40

4Measurement resolution value（mm）：0.001

5Accuracy level:1level

6Meaning of digital display:

Mean: representsPV1andPV2The average of two paths

PV1: represents the deformation measurement value of the road extensometer

PV2: represents the deformation measurement value of the road extensometer

2、 Main features of residual deformation tester for steel bars:

1The residual deformation tester for steel bar mechanical connections consists of two high-precision variable gauge extensometers with consistent sensitivity, forming a double-sided extensometer to directly measure the average deformation on both sides of the sample, and the measurement results are accurate;

2Two extensometers with adjustable measuring gauge length and range50～260mm, Range5mmor10mm；

3Four digit, three row, two input high-precision digital display meter, with the circuit part using24bitA/Dhigh precisionICChip design, real-time display of the true deformation of two extensometers, stable and reliable numerical values;

4The digital display is easy to set up and comes with a password lock setting function to avoid accidental changes to the set values;

5Elastic connections (such as springs and rubber bands) are used between the bilateral extensometers and the steel bars, making it easy to clamp the specimens and ensuring a long service life;

6This instrument is carefully designed by professionals according to the actual situation, with a reasonable structure, and is very suitable for use in construction quality inspection departments for testing.

3、 Main configuration of residual deformation tester for steel bars:

1Variable gauge length extensometer Two;

2High precision digital display meter One;

3Common tool attachments a set;

4User Manual One copy;

5Instrument packaging box One（340×230×110mm）.

4、 Regarding the explanation:

1National standardsJGJ107-2010According to the Technical Specification for Mechanical Connection of Steel Bars, when two steel bars are mechanically connected through cylindrical sleeves and the deformation performance level of the joint is level one in uniaxial tensile testing, residual deformation is requiredu0≤0.10mm(Steel bar diameter)d≤Φ32mm）Andu0≤0.14mm(Steel bar diameter)d＞Φ32mm）. The residual deformation measured in actual work is generally0.030mmto0.080mmbetween. The residual deformation is very small.

2The residual deformation tester for steel bars can only obtain accurate data by measuring with double-sided extensometers;

3Only by using elastic connections (such as springs and rubber bands) between the bilateral extensometers and the steel bars can the measured data be reliable. Multiple experiments have shown that although mechanical rigid connections are convenient to connect, the measurement data has a large error, which is greater than1%Poor repeatability, unreliable data, unable to pass metrological verification