Precision automatic spring tension testing machine: the test machine indicates the difference of the minimum value of the effective resolution.

Residual height: the height of the object after deformation under the action of external force, H.

Variable shape: the relative displacement of the spring along the direction of load, the height of its deformation (free height - remaining height), denoted by delta H.Spring stiffness: the load or torque required to cause the spring to produce unit length (keratin). K= (f2-f1)/(h2-h1) is expressed in N/mm.

JB/T 7796-2005 "spring tension test machine" standard

Production of technical requirements specified in JIS B7738-2001 "compression and tensile coil spring tester"

JJF1134-2005 calibration specification for dedicated work dynamometer

Mechanical structure: This machine selects the high performance step motor, and transfers the power to the beam through the synchronous belt wheel and ball screw. It can drive the sensor to run, the control precision is high, and the stability is good. The sensor is located on the crossbeam, driven directly by the ball screw, reducing the transfer structure of the intermediate force, thus greatly improving the accuracy. The control mode can be operated automatically and controlled by electronic hand wheel: the automatic running speed is uniform, the measurement results are stable, and the repeatability is good; the electronic hand wheel control is suitable for the spring with small deformation and has high controllability.

Control program: the control unit of this machine is the micro operating system developed by our company. It uses American imported Atmel microprocessor as the main control chip. The analog to digital conversion chip is the AD chip produced by the international well-known IC manufacturer ADI. With the mature control mode of our company, the stability and precision of the whole machine are in the leading level in the industry. The screen is made of industrial LCD screen, which has the characteristics of long life, stable performance and wide viewing angle.

1, style: single column type;

2. Maximum test force (N): 30

3. Minimum reading value of test force (N): 0.001

4, measurement range: 0.5% - 100%;

5. The relative error of the test force shows: + 1%

6. Repeatability error of test force indication: 1%

7. Minimum reading value of displacement indication (mm): 0.001

8. Relative error of displacement indication: + 1%

9, repeatability error of displacement indication: 1%

10, speed range (mm/min): 0.01mm/min-500mm/min adjustable.

11. Stretch space: 165mm

12, compressed space: 200mm

13. The diameter of the press disc: 60mm

14, host size (mm): about 300 x 180 x 500mm

15. Protection function: the tester has overload protection function.

16, power supply: AC 220V + 10% 50Hz

17, weight (Kg): about 50

18. Test machine accuracy level: better than grade 1.