Fatigue Test Machine for Springs

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Railways

Fatigue Test Machine For Springs

Technical Specs :

  • Maximum load capacity - 100 kN Sinusoidal (cyclic load)

  • Minimum speed (Frequency of operation) 2 Hz or more 

  • Maximum Stroke 50mm peak to peak stroke.

  • High speed dataecording features in graphical mode in load verses time and displacement verses time.

  • Maximum operating cycles is 3 million cycles 

  • Bed Size: 600 mm x 600 mm

  • Daylight = 250 mm

  • Machine Dimensions : 1200 (L) x 900 (W) x 750 mm (H)


LOAD CELL - STATIC AND DYNAMIC LOAD 

LVDT DISPLACEMENT 

LOAD CELL CONDITIONAL / AMPLIFIER - LOAD CELL SIGNAL AMPLIFICATION 

DAQ HARDWARE - DATA ACQUISITION AND STORAGE TO PC 

DAQ SOFTWARE - NI LAB VIEW CUSTOMIZED OR DAQ ME SOFTWARE FOR REAL TIME DATA VIEW , STORAGE AND ANALYSIS 

PROXIMITY SENSORS - FOR STROKE CONTROKE AS DIGITAL INPUT TO PLC 

<p>LOAD CELL - STATIC AND DYNAMIC LOAD&nbsp;</p> <p>LVDT DISPLACEMENT&nbsp;</p> <p>LOAD CELL CONDITIONAL / AMPLIFIER - LOAD CELL SIGNAL AMPLIFICATION&nbsp;</p> <p>DAQ HARDWARE - DATA ACQUISITION AND STORAGE TO PC&nbsp;</p> <p>DAQ SOFTWARE - NI LAB VIEW CUSTOMIZED OR DAQ ME SOFTWARE FOR REAL TIME DATA VIEW , STORAGE AND ANALYSIS&nbsp;</p> <p>PROXIMITY SENSORS - FOR STROKE CONTROKE AS DIGITAL INPUT TO PLC&nbsp;</p>
<p>CONSTANT CONTACT SIDE BEARER (RDSO)&nbsp;</p> <p><strong>Technical Parameter Requirements of Constant Contact Side Bearers.</strong></p> <p>Following are the technical terms related to constant contact side bearers-</p> <ul> <li><strong>Free height</strong>: Unloaded height of CCSB (to be included in the drawing)</li> <li><strong>Set up height</strong> -Set up height is the nominal installed height of side bearer in the wagon on levelled track. </li> </ul> <p>The designed <strong>set up height</strong> for all the variants is <strong>128.5mm.</strong></p> <ul> <li><strong>Pre load</strong> - Pre load is the vertical load taken by the side bearer at <strong>set up height.</strong></li> <li><strong>Side bearer travel - </strong>Side bearer travel is the compression of side bearer from <strong>nominal set up height to solid height.</strong> The specified travel for long travel side bearers is <strong>16mm.</strong></li> <li><strong>Solid Height</strong> - Solid height is compressed height of CCSB at non yielding arrangement. It is nominal set up height minus travel of the CCSB.</li> </ul> <p>All the three variants of CCSB shall have following parametric requirements:</p> <ul> <li>Free Height: 167 mm&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </li> <li>Setup height: 128.5 mm&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </li> <li>Solid height: 112.5 mm (Maximum)</li> <li>Pre-Load = 2540 kg &plusmn; 100 kg&nbsp;&nbsp;&nbsp;&nbsp; Weight = 16.8 kg </li> <li>Spring Stiffness = 41 kg/ mm (Outer Spring ) &amp; 24 kg/mm (Inner Spring)</li> <li>Maximum Spring deflection = 58 mm</li> <li>Load at solid height of CCSB should not be more than FOUR times of nominal preload.</li> <li>A non-yielding arrangement is to be provided to restrict compression of CCSB beyond solid height. </li> <li>Preload of CCSB with non-metallic springs shall be taken after 24 hours of compression at set-up height.</li> </ul>

CONSTANT CONTACT SIDE BEARER (RDSO) 

Technical Parameter Requirements of Constant Contact Side Bearers.

Following are the technical terms related to constant contact side bearers-

  • Free height: Unloaded height of CCSB (to be included in the drawing)
  • Set up height -Set up height is the nominal installed height of side bearer in the wagon on levelled track.

The designed set up height for all the variants is 128.5mm.

  • Pre load - Pre load is the vertical load taken by the side bearer at set up height.
  • Side bearer travel - Side bearer travel is the compression of side bearer from nominal set up height to solid height. The specified travel for long travel side bearers is 16mm.
  • Solid Height - Solid height is compressed height of CCSB at non yielding arrangement. It is nominal set up height minus travel of the CCSB.

All the three variants of CCSB shall have following parametric requirements:

  • Free Height: 167 mm             
  • Setup height: 128.5 mm              
  • Solid height: 112.5 mm (Maximum)
  • Pre-Load = 2540 kg ± 100 kg     Weight = 16.8 kg
  • Spring Stiffness = 41 kg/ mm (Outer Spring ) & 24 kg/mm (Inner Spring)
  • Maximum Spring deflection = 58 mm
  • Load at solid height of CCSB should not be more than FOUR times of nominal preload.
  • A non-yielding arrangement is to be provided to restrict compression of CCSB beyond solid height.
  • Preload of CCSB with non-metallic springs shall be taken after 24 hours of compression at set-up height.

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