HB Series From 50 to 2500 kN

Standard versions of the HB load frame in the 50 to 2,500kN range have the testing actuator located above the test area. The version with integrated T-slotted platform allows flexure tests and component testing to be performed in addition to standard fatigue tests.

Servohydraulische Prüfmaschine HB-Baureihe für dynamische Prüfungen

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Technical Overview

The test frame features extremely high stiffness, resulting in natural resonance. To avoid unwanted flexural stresses in the specimen the load frames are accurately aligned.

Description

These 2-column load frames are designed for materials and component testing under dynamic loading in a closed force-flow. The frame is supported on vibration-isolating leveling units so that no appreciable forces are transmitted to the floor during normal operation. Where tests or environmental conditions are critical in nature, the use of optionally available air-springs is advisable; these have a natural frequency of approximately 3 - 6 Hz.

The efficiency of the testing system is enhanced by the especially high axial and lateral stiffness of the HB load frames, enabling higher frequencies and specimen deformations Moreover, high lateral forces which may occur in compression and flexure tests can be absorbed without difficulty.

The frames also feature extremely precise alignment; Following installation of the testing actuator and load cell, alignment accuracy is +0.1 mm per meter separation; at distances below 350mm the offset is constant at 0.05mm. Plane-parallelity of mounting surfaces is equal to or better than 0.03 mm per 100 mm. All fixtures and ZwickRoell load cells are mounted via flanges with centering-spigot.

Advantages & features

4 standard nominal ratings from 50 kN to 2500 kN
testing actuator mounted on upper crosshead
convenient working height
hydraulic clamping and adjustment for easy positioning of upper crosshead
comprehensive range of accessories, including hydraulic grips, compression platens, flexure test kit etc.
safety housing for compliance with CE Machinery Directive
version with integrated T-slotted specimen ideal for fatigue tests on components

Technical data

Dynamic nominal force	50	100	250	500	kN
Crosshead clamping	electro-hydraulic	electro-hydraulic	electro-hydraulic	electro-hydraulic
Crosshead adjustment	electro-hydraulic	electro-hydraulic	electro-hydraulic	electro-hydraulic
A_G100 – max. test-frame height with 100mm-stroke actuator	3175 (3675)^[1]	3259 (3759)^[1]	3523 (4023)^[1]	4045 (4545)^[1]	mm
A_G250 – max. test-frame height with 250mm-stroke actuator	3475 (3975)^[1]	3559 (4059)^[1]	3823 (4323)^[1]	4345 (4845)^[1]	mm
A_G400 – max. test-frame height with 400mm-stroke actuator	-	3859 (4359)^[1]	4123 (4623)^[1]	4635 (5135)^[1]
A – max. column height	2690 (3190)^[1]	2690 (3190)^[1]	2900 (3400)^[1]	3250 (3750)^[1]	mm
A_K - tilted dimension for installation	2820 (3320)^[1]	2820 (3320)^[1]	3060 (3560)^[1]	3500 (3980)^[1]	mm
B — max. width of test frame	1079	1079	1197	1525	mm
C – max. depth of test frame	780 (1020)^[2]	780 (1020)^[2]	1130 (1130)^[2]	1130 (1370)^[2]	mm
D₁ – column spacing	565	565	670	800	mm
E – column diameter	80	80	100	120	mm
F - height of top edge of lower crosshead^[3]	950	950	890	900	mm
G – max. test area height^[4]	1510 (2010)^[1]	1510 (2010)^[1]	1705 (2205)^[1]	2120 (2620)^[1]	mm
H – max. working test area height^[5]	1434 (1934)^[1]	1434 (1934)^[1]	1614 (2114)^[1]	2020 (2520)^[1]	mm
J - crosshead displacement range	1000 (1250)^[1]	1000 (1250)^[1]	1150 (1400)^[1]	1250 (1400)^[1]	mm
Weight without T-slotted platform^[6]	899 (945)^[1]	895 (941)^[1]	1361 (1430)^[1]	3660 (3780)^[1]	kg
Weight with T-slotted platform^[6]	1137 (1182)^[1]	1133 (1178)^[1]	2082 (2232)^[1]	4860 (4980)^[1]	kg
Frame stiffness with crosshead separation 1000 mm^[7]	730	730	988	1529	kN/mm
Frame stiffness with crosshead separation 1000 mm^[2]	870	870	1332	1848	kN/mm
Item No.
Standard height	077533	924779	040159	079720
Standard height with T-slotted platform	077370	079752	040158	079728
Extra-high + 500 mm	750972	077534	079755	079721
Extra-high + 500 mm with T-slotted platform	077535	079753	079756	079733
Number of columns				2
Frame stiffness at 1000-mm test area height				2100
Top crosshead adjustment				Hydraulic
Top crosshead clamping				Hydraulic
Finish				RAL 7011 and RAL 7038
Weight with typical accessories, approx.				4700
Area required for installation:
Actual footprint				962.11
Test frame base area				1.7755
Specific floor loading (weight / actual footprint):
Based on typical accessories				479.06
With 50 % safety				718.6
Floor load (weight / Space requirements):
Based on typical accessories				370.462
At specimen break (3x), max.				1111.4