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tensile specimens grinding machine PSM2000 (generation 3)
DIN/EN 10002 (DIN 50114/50125) or other shapes

 Basic requirement to receive correct + reproducible results are the specimens itself

Punching / blanking is the most effective and economic method the receive a tensile specimen from sheet metal plate (limit 0.05 – 8.0 mm / 0.003 – 0.3”). When using a punch for blanking the specimens it is a MUST (technological and instruction of all standards) to remove the damaged edges from punching.

(for details see background knowledge)

We redesigned the specimen grinding machine (first construction in 1967). With the new layout also unskilled people are able to prepare specimens with highest quality within minutes. The punches (or milled) specimen will be clamped into a specimens holder. Within 1 ½ - 2 minutes grinding you will remove the first 0.2 – 0.6 mm of each side of the parallel measuring length of the specimen. The specimen will receive a perfect surface (longitudinal grinded) with a paralism of 0.02 mm (0.0008”) and pure, not compressed (not cold hardened) edges…

Granted paralism of reduced section 0,02 mm according recommendation of
IDDRG - International Deep Drawing Research Group.

specimen grinding machine PSM2000
(length of belt 2000 mm x width 100 mm)

Showing the working principle: The tensile specimen is placed on the grinding belt to show that the belt is following the contour of the measuring length (including radius)

The grinding test and the rollers do have the same dimensions of specimen
(reduced section Lc / A including radius)

The complete grinding process for a package of samples up to 12 mm needs

• Inserting the specimens into specimen holder
• Grinding both sides
• Taking out specimens from specimen holder

The specimen’s quality is minimum equivalent with a milled specimen on a high quality CNC milling machine. (Hint: Some special steels it is not possible to mill…!)

Because the tensile specimen is ready to test in less than 3 minutes (including blanking the specimen) THIS IS THE LEADING solution for small and medium specimen preparation (up to 500 specimens per shift).

... even when the truck waits outside with still loaded coils ready to go.

The specimen grinding machine PSM2000 is the most famous machine in the range of specimen preparation systems for tensile specimens of sheet metals.

Some very special steel does not allow to be milled. For this steels the only way to prepare is to grind them.

More and more this machine gets importunate also at micro structure sheet metal steels with high tensile strength (up to 1,500 MPa) and low elongation.
If you like to have exact results the grinding of this material (and also hot deforming) is the only way to reach the target. Punch the specimen with very high alloyed steel punching die (vanadium alloy) or cut it by water jet / laser. After this process it is a must to grind this to remove the rough surface (water jet) or thermal influence (laser).

You are obliged that specimen rupture has to occur inside of the knifes of extensometer (knifes of extensometer) we are able to design the grinding desk with special design: The specimen will receive a reduction in the middle of the specimen (each side 0.03 – 0.04 mm). So total reduction will be 0.06 – 0.08 mm.
The chance to increase the chance that specimen rupture will be near to the middle increases consequently.

Tensile specimen grinding machine PSM2000 and specimen punches with blanking tools are available for forces from 50 - 3.000 kN and for all standards like ASTM, GHOST, DIN/EN, BS, AFNOR, JIS, etc.