Static Material Testing Machines From Zwick Suit A Range of Requirements

In order to be able to offer the best machine for each requirement, Zwick‘s comprehensive product range includes three machine versions for static materials testing, each of them offering different equipment, performance and expansion capabilities:

  • The zwicki-Line consists of top quality space-saving testing machines. These simple-to-use and easy-to-transport single column machines have been designed for test forces up to a maximum of 2.5 kN.
  • The ProLine is particularly suitable for functional tests on component parts as well as for standard materials tests. A broad range of standard accessories provides comprehensive testing capability at an affordable price.
  • The Allround-Line is the flagship range of testing equipment offering the highest level of technical sophistication and future expansion possibilities.

The ProLine materials testing machines for materials, component and component functionality testing

Figure 1. The ProLine materials testing machines for materials, component and component functionality testing

Measurement and Control System

The fundamental component for any testing machine is the measurement and control system. Its design and scope of capabilities determine which drive system it can regulate, which measurement system it is connected to and which functions can be controlled. The testControl controller offers highest technical performance and long range return of investment through the use of the latest technologies and highest quality standards. Notable characteristics of the electronics are:

  • Chronologically-synchronized test data recording with high resolution and measurement frequency
  • Sampling of input signal at 320 kHz 500 Hz real-time processing of the test data for monitoring and event oriented control of the test sequence and for safety limits. (e.g. speed change upon reaching the yield or proof stress limit)
  • Adaptive control for precise and reproducible speeds and positions testControl and hence the testing machine, is operated by using a PC and the test software testXpert® II.

The system is easy to configure and upgrade for almost any diverse application as well as extremely flexible and easy to operate. The optional stand-alone variant offers simple, direct operation of the testing machine without a PC, using a colour display, a key pad and a few, intuitive function keys. A printer can be connected to output the test results.

Extended-height load frame version for testing of plastic film

Figure 2. Extended-height load frame version for testing of plastic film

Materials testing: tensile test according to ISO 527-2

Figure 3. Materials testing: tensile test according to ISO 527-2

Load Frames

Different load frame versions are available for test loads up to 2000 kN as standard. Special applications can be developed and manufactured, e.g. load frames in horizontal position suitable for the testing of long ropes.

Table 1. zwicki-Line load frames and drives

Series

Z1.0

Z2.5

Max. test load [kN]

1.0

2.5

Work space height

short [mm]

-

573

normal [mm]

-

1073

high [mm]

1373

1373

Work space width [mm]

x

x

Work space depth [mm]

99.5

99.5

Max. crosshead speed [mm/min]

1800

800

Crosshead travel resolution [ìm]

0.2265

0.0996

Max. power consumption, kVA

0.4

0.4

Table Top Testing Machines, zwicki-Line

These single column load frames are designed with very-rigid aluminium high-precision extruded profiles. The working area is freely accessible from 3 sides. It only requires limited bench space and fits on most laboratory tables. Due to its low weight, it is easy to transport.

zwicki-Line materials testing machine in a short version

Figure 4. zwicki-Line materials testing machine in a short version

zwicki Z2.5 equipped with appropriate fixturing to determine the coefficients of friction (COF)

Figure 5. zwicki Z2.5 equipped with appropriate fixturing to determine the coefficients of friction (COF)

Table Top Testing Machines, ProLine

The load frames of the ProLine are designed with twin lead screws and 2 round steel columns ensuring precise guidance of the moving crosshead. The integrated protection of lead screws and guide columns aids reliable testing even for very brittle materials.

A single column version is available within the ProLine range for testing at forces of up to 500 N.

Allround-Line Z010 equipped for tensile testing

Figure 6. Allround-Line Z010 equipped for tensile testing

Table Top and Floor Standing Models, Allround-Line

The table-top version is constructed using two aluminium, high-precision extruded profiles (patented design). They are light, very rigid and serve simultaneously as lead-screw guides and protection. T-shaped grooves on the outer sides allow a simple fitting of accessories as e.g. safety devices without being impeded by the crosshead.

A unique development by Zwick allows all table top load frames with two columns to be equipped with legs to allow them to stand on the floor and position the working area at an optimum height for the operator. This allows a comfortable seated operation with complete freedom for leg movement thus making the testing system suitable for wheelchair users.

The floor standing models are equipped with hard-chrome plated steel guiding columns and high precision and backlash-free ball screws. The crossheads of these loadframes can be arranged in different ways, so that the lower, upper, or both workspaces can be utilized.

All load frames with an electromechanical drive system can be equipped with a second working area. This allows a fast and convenient work station and can eliminate the need for the operator to change tooling and operator.

Allround-Line Z050 in an extended version for testing tensile characteristics and ring stiffness on plastic pipes

Figure 7. Allround-Line Z050 in an extended version for testing tensile characteristics and ring stiffness on plastic pipes

Allround-Line Z100 equipped with pneumatic grips and Macro extensometer

Figure 8. Allround-Line Z100 equipped with pneumatic grips and Macro extensometer

Drives

Electromechanical Drives

All electromechanical drives are based on play-free and low-wear ball-type linear drives and digitally controlled drives. They are equipped with load frames for test loads up to 600 kN. Combined with digital measurement and control systems, they offer the following advantages:

  • Extremely-large, infinitely-variable speed range
  • Very-low speed settings possible (from about 0.5 ìm/min)
  • Highly precise and exactly reproducible positioning

Hydraulic Drives

This drive is located in the center of the upper fixed crosshead. The workspace below is therefore easily accessible. A servo or proportional valve regulates the oil flow between the hydraulic unit and differential cylinder. The oil cushion in the upper pressure prevents plunger pistons from “jumping” when a specimen breaks. The resolution of the piston travel sensor is 1.25 ìm (less than 1/400,000th of the maximum testing travel. The hydraulic drive is the most efficient solution particularly for large test loads.

Hybrid Drives

These patented drives combine the advantages of the electromechanical drive (high position accuracy) and with those of the hydraulic drive (high-force capacity, low wear, robust unit). The result is a test machine which has very-high force capacity can be used to measure and accurately control small displacements. This is accomplished by utilizing two parallel, synchronized hydraulic cylinders coupled with the machine crosshead, which follow precisely the positions specified by the electromechanical pilot drive. The special features of this drive are:

  • Large crosshead travel range (no adjustment of the fixed crosshead necessary)
  • Relatively low-construction height allowing easier installation

Table 2. ProLine Load Frames and Drives

Model

Z0.5

Z005

Z010

Z020

Z030

Z0501

Z100

Max. test load [kN]

0.5

5

10

20

30

50

100

Work space height

shortened [mm]

-

570

-

-

-

-

-

normal [mm]

590

1070

1050

1050

1370

1370

1360

increased [mm]

1360

-

-

-

-

-

-

Work space width [mm]

4

440

440

440

440

440

640

Work space depth [mm]

100

4

4

4

4

4

4

Max. crosshead speed [mm/min]

1500

500

1000

500

300

180/6001

300

Crosshead travel resolution [ìm]

0.226

0.039

0.095

0.047

0.025

0.015/0.0161

0.008

Max. power consumption, kVA,

0.4

0.8

0.8

0.8

0.8

0.8/31

3

1 This testing machine is available in two drive / speed options

Table 3a. Allround Line Load Frames and Drives – Tabletop Testing Machines

Model

Z005

Z010

Z020

Z030

Z050

Z100

Z150

Max. test load [kN]

5

10

20

30

50

100

150

Work space height

normal [mm] 2

1045/1025

1045/1025

1045/1025

-

-

-

-

increased [mm] 2

1445/1425

1445/1425

1445/1425

1355

1355

1355

1535

extra high [mm] 2

1795/1785

1795/1785

1795/1785

-

-

1755

-

Work space width

normal [mm]

440

440

440

440

440

-

-

widened [mm]

640

640

640

-

-

640

640

Work space depth [mm]

4

4

4

4

4

4

4

Max. crosshead speed [mm/min]

3000

2000

1000/20003

1000

600

750/15003

900

Crosshead travel resol. [ìm]

0.0410

0.0272

0.0136/0.05433

0.0271

0.0163

0.0207

0.0123

Max. power consumption kVA

2

1.9

2.1/2.63

2.3

2.3

4/63

5.5

2 The second value is for the model with the widened work area

3 Dependent on selected drive and its power rating

Table 3b. Allround Line Load Frames and Drives – Floor-standing Test Machines

Model

Z050

Z100

Z150

Z250

Z400

Z600

Z1200

Max. test load [kN]

50

100

150

250

400

600

1200

Work space height [mm]

1825/17602

1825/17602

1715/16552

1715/16552

1800

1940

2266

Work space width

normal [mm]

630

630

630

630

630

740

800

widened [mm]

1030

1030

1030

1030

-

-

-

Work space depth [mm]

4

4

4

4

4

4

4

Max. crosshead speed [mm/min]

1000/20003

500/10003

900

600

250

200

400

Crosshead travel resol. [ìm]

0.0270

0.0136

0.0123

0.0082

0.031

0.025

0.005

Max. power consumption kVA

4/53

4/53

5.5

6

7/13

20/26

20/25

2 The second value is for the model with the widened work area

3 Dependent on selected drive and its power rating

4 Higher power applies for hydraulic grips

Table 4. Standard frames with hydraulic (H) or hybrid (Y) (Standard program with hydraulic or hybrid drives)

Model

Z400H

Z600H

Z1200H

Z2000H

Z600Y

Z1200Y

Z2000Y

Max. test load kN

400

600

1200

2000

600

1200

2000

Load frame dimensions

height mm

2900

3000

3500

4200

2750

3147

4200

width mm

1020

1080

1300

1400

1530

1614

1870

depth mm

480

500

880

905

788

790

1100

Work area

max. height mm

500

500

600

600

1895

2300

2400

with adjustable fixed crosshead

900

900

1000

1000

width mm

670

670

850

870

790

860

950

max. mm

500

500

600

600

850

1000

1000

Crosshead/piston travel resol. ìm

1.25

1.25

1.25

1.25

0.05

0.05

0.05

Max. testing speed. mm/min

200

200

200

200

250

250

250

Number of support/guide columns

2

2

4

4

2

2

2

Max. power consumption kVA

4/53

4/53

5.5

6

7/134

20/264

20/254

3 Dependent on selected drive and its power rating

4 Higher power applies for hydraulic grips

This information has been sourced, reviewed and adapted from materials provided by Zwick.

For more information on this source, please visit Zwick.

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