Pendulum Impact Testers for Tests on Metals

The choice for impact tensile and impact bending tests on metals.

  • The RKP 450 pendulum impact tester can be used for Charpy, Izod, Brugger, impact tensile and wedge impact tests to all established DIN, EN, ASTM, ISO and BS standards.
  • The PSW 750 pendulum impact tester can be used for Charpy and impact tensile tests on metals to all established DIN, EN, ASTM, ISO and BS standards.

Key Advantages and Features

Up to 450 J

RKP 450 – Pendulum Impact Testers up to 450 Joules

  • The basic unit consists of a vibration-damping steel casting, providing a high level of mechanical stiffness and ensuring reliable test results.
  • Operation is fast and convenient, with easy specimen insertion and pendulum release. This is particularly important for tests to ISO 148 and ASTM E 23 with temperature-conditioned specimens, as they must be impacted 5 seconds after removal from the temperature conditioning area.
  • Operation is further simplified by quick changing of Charpy fixtures and pendulums, coupled with straightforward access for maintenance, servicing and calibration plus easy removal of specimen remains.
  • testXpert III provides access to powerful software packages for all commonly used standards plus instrumented and non-instrumented tests.
  • Zwick pendulum impact testers in the RKP 450 range satisfy the requirements of EC Machinery Directive 2006/42/EC and of EN ISO 12100 and EN ISO 13849-1/2. This also means that the failure of an individual safety control element will not result in the loss of overall instrument safety.
  • RKP 450 pendulum impact testers therefore provide maximum protection for operator and instrument. An officially (TÜV) certified safety control system with redundant micro-controllers monitors the entire safety set-up.
  • The electronics include a high-resolution angular encoder for precise measurement of the angle of rise. An RS232 interface is available for connection to laboratory data management systems with plug and play PC connection via a USB port.
  • A special version allows temperature-conditioned wedge-impact tests to be performed in a temperature range from -45°C to +85°C.

Up to 750 J

PSW 750 – Pendulum Impact Testers up to 750 Joules

  • The basic unit consists of a vibration-damping steel casting, providing a high level of mechanical stiffness and ensuring reliable test results.
  • Operation is simple and convenient, with central controls and easy specimen insertion and pendulum release. This is particularly important for tests to ISO 148 and ASTM E 23 with temperature-conditioned specimens, as they must be impacted 5 seconds after removal from the temperature conditioning area. Fast, convenient operation is guaranteed by quick
  • fixture and pendulum changes, coupled with straightforward access for maintenance, servicing and calibration plus easy removal of specimen remains.
  • testXpert III provides access to powerful software packages for all commonly used standards, instrumented and non-instrumented tests.
  • The PSW 750 satisfies all necessary safety requirements such as DIN 51333 and EN ISO 13489, plus additional European standards coming into force in 2009, providing maximum protection for operator and instrument.
  • PSW 750 pendulum impact testers therefore provide maximum protection for operator and instrument. An officially (TÜV) certified safety control system with redundant micro-controllers monitors the entire safety set-up.
  • The electronics include a high-resolution angular encoder for precise measurement of the angle of rise. An RS232 interface is available for connection to laboratory data management systems. A PC can be connected via a USB plug-and-play interface.

Operating principle

Operating Principle of a Pendulum Impact Tester

The name "pendulum impact tester" is self explanatory for the function of the machine. A lifted mass has potential energy. This is converted to kinetic energy by the mass being subjected to a free fall. Binding the mass to a fixed pivot (pendulum) deflects the velocity vector. Impact loading of a material being tested is realized at the point of maximum kinetic energy (equal to the minimum potential energy) of the mass. This takes the form of a "flexure test".

This pendulum impact tester is used for examining the break behavior of metallic materials at impact loading. A suitable standardized specimen is loaded in the flexure test until it is completely broken. The work required is measured and is known as the energy absorbed AV. The term "notched impact strength" aK is often used, which refers to the energy absorbed AV on specimen cross-section S; it is measured in j/cm2. However, modern test methods examine the functions of the energy absorbed or the flexural force in time and/or travel (deformation of the specimen). Since thermal energy influences the notched bar impact test to a high degree, this method always depends on the temperature of the specimen. This becomes increasingly important if the temperature deviates from ambient temperature through the use of temperature conditioning devices.

Safety Device

Zwick pendulum impact testers in the RKP 300 / RKP 450 / PSW 750 ranges satisfy the requirements of EG Machinery Directive 2006/42/EG and of EN ISO 12100 and EN ISO 13849-1/2. This also means that the failure of an individual safety control element will not result in the loss of overall instrument safety.
The pendulum impact testers as a whole have been revised in this respect. The resulting safety device satisfies the requirements of national and international standards.

During design of the safety housing a primary consideration was ease of operation, whether during the test, during re-equipping for different specimens or types of test, or during maintenance and calibration. Centrally located controls, which (with the exception of simple visual confirmation of the function selected) also indicate operating errors, make working with these pendulum impact testers safe, simple and fast.

Front door, side door and housing recess enable:

  • easy specimen insertion
  • fast fixture and pendulum changes
  • easy access for maintenance, inspection and calibration
  • straightforward removal of specimen remains.

Safety and standards

The pendulum impact tester conforms to the following safety requirements: EC Machinery Directive 2006/42/EC, EN ISO 12100 and EN ISO 13849-1/2.

The pendulum impact tester can be used for tests to the following standards: ISO 148-1, ISO 14556, DIN 50115, ASTM E23, BS131-1, ZF 15-53, ISO 11343, JIS Z 2242, GOST 9454-78.

  • Indirect calibration:
  • as per ASTM E23 with NIST specimens in energy ranges low (14 to 20 J) and high (88 to 136 J); super high is not currently available from NIST.
  • as per ISO 148-2 with ERM or ZRM specimens in ranges low (< 20 J), medium (30 to 110 J), high (110 to 220 J) and very high (> 220 J) energy.

Pendulum impact testers and automation - a successful pairing

5:14

Charpy impact test to Charpy on metals, automated, temperature-conditioned

roboTest I with PSW750 pendulum impact tester for impact tests on metals

Technical Overview

Up to 450 J

Technical data for basic units

Type

RKP 450 AR (analog display)

RKP 450 GE (digital and analog display)

RKP 450 IR GE (instrumented tests, digital and analog display)

RKP 450 KIR GE (instrumented wedge impact tests, ISO 11343/ EN 14493)

Item No.

326195

326197

027178

027179

Potential energy

450

450

450

450

J

Impact velocity

5.23

5.23

5.23

1.02 to 5.23

m/s

Weight:

Depending on pendulum hammer used

590 to 610

590 to 610

590 to 610

500 to 610

kg

concrete base

1550

1550

1550

400

kg

safety device

90

90

90

90

kg

Dimensions, without base:

height

2000

2000

2000

2000

mm

width

1904

1904

1904

1904

mm

depth

500

500

500

500

mm

Dimensions, with base:

height

2450

2450

2450

2450

mm

width

2000

2000

2000

2000

mm

depth

1000

1000

1000

1000

mm

Interfaces

USB, RS 232

USB, RS 232

USB, RS 232

USB, RS 232

Electrical supply:

voltage

3 x 400

3 x 400

3 x 400

3 x 400

V

frequency

50

50

50

50

Hz

power consumption

0.5

0.5

0.5

0.5

kW

Test results, numerical

impact energy [%], impact energy [J], impact strength [kJ/m2]

impact energy [%], impact energy [J], impact strength [kJ/m²]

impact energy [%], impact energy [J], impact strength [kJ/m²], characteristic values to ISO 14556

mean wedge impact resistance

Output units

analog dial display

instrument electronics digital display, analog dial, PC[1]

instrument electronics digital display, analog dial, PC[1]

instrument electronics digital display, analog dial, PC[1]

Control functions

friction correction, pendulum vertical position, oscillation period, device data display

Correction functions

none

air and bearing friction, kinetic yoke energy (tensile impact testing)

air and bearing friction, kinetic yoke energy (tensile impact testing)

air and bearing friction

Pulse resolution

0.036

0.036

0.036

0.036

°

  1. If PC connected with testXpert testing software. The specimen dimensions are input on the PC or, for example, imported via calipers and testXpert.

Up to 750 J

Technical data for basic units

Type

PSW 750 AR (analog display)

PSW 750 GE (digital and analog display)

PSW 750 IR GE (instrumented tests, digital and analog display)

Item No.

003620

003618

027180

Potential energy

750

750

750

J

Impact velocity

5.42

5.42

5.42

m/s

Weight

depending on pendulum hammer used, approx.

1200

1200

1200

kg

concrete base, approx.

2200

2200

2200

kg

safety device, approx.

130

130

130

kg

Dimensions, without base

height

2234

2234

2234

mm

width

2500

2500

2500

mm

depth

800

800

800

mm

Dimensions, with base

height

2734

2734

2734

mm

width

2500

2500

2500

mm

depth

1300

1300

1300

mm

Interfaces

USB, RS 232

USB, RS 232

USB, RS 232

Electrical supply:

voltage

3 x 400

3 x 400

3 x 400

V

frequency

50

50

50

Hz

power consumption

0.5

0.5

0.5

kW

Test results, numerical

Impact energy [%], impact energy [J]

impact energy [%], impact energy [J], impact strength [kJ/m²]

impact energy [%], impact energy [J], impact strength [kJ/m²]

Output units

Analog dial display

instrument electronics digital display, analog dial, PC[1]

instrument electronics digital display, analog dial, PC[1]

Control functions

Friction correction, pendulum vertical position, oscillation period, device data display

Correction functions

None

Air and bearing friction, kinetic yoke energy (tensile impact testing)

Air and bearing friction, kinetic yoke energy (tensile impact testing)

Pulse resolution

0,036

0,036

0,036

°

  1. If a PC with testXpert testing software is connected. The specimen dimensions are input via the PC or, for example, imported via calipers and testXpert.
Top