Macchine di prova Elettrodinamiche LTM

Electrodynamic testing machines are used to determine material and component fatigue-strength in the fatigue life and fatigue limit ranges.

The LTM’s wide speed range allows it to be used for both dynamic fatigue tests and quasi-static tests. The oil-free drive, combined with ease of installation, makes the electrodynamic testing machine ideal for use in biomedical engineering and electronics, as well as for research and training. Typical examples include tests on hip-joint and knee replacements and dental implants. Other applications are tests on standard plastics and composites specimens, as well as aluminum and plastics CT and SEB specimens. The electrodynamic testing machine is available with loads of 1, 2, 3, 5 and 10 kN.

The Electromagnetic Drive 

The LTM linear motor testing machine is based on a patented electrodynamic drive system from ZwickRoell.

The drive was specifically designed for the relevant speed range

  • High positioning accuracy
  • Optimal control quality
  • High frequency rate 
  • Reliable test results

Key Advantages and Features

Description

The LTM is an electrodynamic testing machine with a drive based on linear motor technology. ZwickRoell's newly developed patented drive concept enables the LTM to be used for both dynamic and static materials and components testing. The low moved mass of the drive provides ideal conditions for performing fatigue tests with tensile, compression, and flexural loading.

The LTM is used in industries where oil-free and low-noise drive technology are preferred, for example, in the medical industry for standard-compliant testing of hip joint, knee, or dental implants.

Other typical application examples include fatigue and durability tests on standard specimens made of plastics, fiber composites and metals.

For components testing, the LTM is equipped with a T-slotted plate that can be adapted to components, and test fixtures quickly and easily as standard.

Intuitive operation via testXpert R and testXpert III software makes the LTM a genuine all-rounder for industrial purposes as well as for research and teaching at university level.

Advantages

  • High dynamic performance due to low moving mass
  • Wide speed-range enables dynamic as well as quasi-static tests
  • Low operating and maintenance costs with oil-free drive technology without additional supply feeds
  • Motor-driven traverse adjustment for convenient operation
  • safe setup mode as per EN 60204-1 via speed reduction to 10 mm/s
  • Simple manual crosshead locking via hand lever with electrical monitoring and LED status indicator
  • Long piston-stroke (60 mm) enables wide variety of applications
  • Operator-friendly testXpert R testing software with preset controller settings and availability of free controller definition for dynamic testing requirements
  • Intelligent testing software testXpert III featuring intuitive operation for static testing requirements.
  • Flexible use of specimen grips and fixtures over the entire dynamic product range
  • The electromagnetic drive was designed specifically for the speed range relevant to testing technology and features exceptionally quiet operation, optimum control quality and extremely high positioning accuracy
  • The travel measuring system is coaxial to the test axis and mounted near the specimen in the piston rod, enabling high positioning repeatability and precise piston travel measurement

Le frequenze di prova pari a 100 Hz assicurano tempi di esecuzione brevi, dando la possibilità di analizzare un elevato numero di campioni.

Il motore lineare non richiede alimentatori supplementari, come pneumatici, liquidi refrigeranti o olio. Ciò riduce i costi di servizio e installazione.

Il funzionamento avviene tramite testXpert® R per prove le dinamiche e testXpert® II per le prove statiche. Si tratta di un software intuitivo personalizzato per soddisfare i requisiti di prova.

Avendo componenti non soggetti ad usura, non richiede particolare manutenzione.

The Displacement Measuring System

During the design stage, particular attention was paid to the positioning of the displacement measuring system—close to the specimen and in the center of the test axis.

The displacement measurement is coaxial and mounted near the specimen in the piston rod.

  • By avoiding displacement measurement errors, exceptional positioning and repetition accuracy can be achieved.

Descrizione tecnica

LTM 1 / 1 HR

Type

LTM 1           Standard

LTM 1           + 400 mm[1]

LTM 1 HR     Standard

LTM 1 HR     + 400 mm[1]

Item No.

1045232

1053558

3006625

3006626

Fmax, dynamic

± 1000

± 1000

± 1000

± 1000

N

Fmax, static continuous

± 910

± 910

± 910

± 910

N

Piston stroke

60

60

60

60

mm

Positioning and repeat accuracy

± 2

± 2

± 2

± 2

μm

Speed range

1.5

1.5

2

2

m/s

Maximum frequency[2]

100

100

120

120

Hz

Noise level at 1 meter distance, max.[3]

< 61

< 61

< 61

< 61

dB(A)

Noise level at 1 meter distance, typically[3]

< 45

< 45

< 45

< 45

dB(A)

Load frame

Overall height of testing machine, max. (A)[4]

1455

1855

1455

1855

mm

Overall height of testing machine with Base option, max. (E)[4]

2104

2504

2104

2504

mm

Overall height of test frame, max. (F)

906

1306

906

1306

mm

Overall height of test frame with support legs, max. (B)

945

1345

945

1345

mm

Overall width of load frame

665

665

665

665

mm

Total depth of load frame

525

525

525

525

mm

Column diameter

65

65

65

65

mm

Frame stiffness at 500 mm crosshead separation

25

40

25

40

kN/mm

Height, base (G)

692

692

692

692

mm

Width, base

800

800

800

800

mm

Depth, base

700

700

700

700

mm

Total weight[5]

210

270

210

270

kg

Working area

Working area width

460

460

460

460

mm

Working area height w/o load cell, max. (D)[4] [6]

640

1040

640

1040

mm

Working area height with load cell, max. (C)[4] [6]

550

950

550

950

mm

Top crosshead adjustment

Motorized

Top crosshead clamping

Manual

Crosshead clamping electrically monitored

Yes, with signal indicator

  1. Extended load frame (required for use with a temperature chamber)
  1. Depending on load ratio (r-ratio) and test amplitude
  1. Depending on output required, environment, testing arrangement, testing type, frequency and specimen type. Measured at 1m distance, free field, analog to DIN EN ISO 11205
  1. Highest crosshead position
  1. Testing machine only, w/o electrical cabinet, accessories and options
  1. Median piston position

LTM 2 / 2 HR

Type

LTM 2           Standard

LTM 2           + 400 mm[1]

LTM 2 HR     Standard

LTM 2 HR     + 400 mm[1]

Item No.

1045234

1053560

3006627

3006628

Fmax, dynamic

± 2000

± 2000

± 2000

± 2000

N

Fmax, static continuous

± 1400

± 1400

± 1400

± 1400

N

Piston stroke

60

60

60

60

mm

Positioning and repeat accuracy

± 2

± 2

± 2

±2

μm

Speed range

1.5

1.5

2

2

m/s

Maximum frequency[2]

100

100

120

120

Hz

Noise level at 1 meter distance, max.[3]

< 61

< 61

< 61

< 61

dB(A)

Noise level at 1 meter distance, typically[3]

< 45

< 45

< 45

< 45

dB(A)

Load frame

Overall height of testing machine, max. (A)[4]

1455

1855

1455

1855

mm

Overall height of testing machine with Base option, max. (E)[4]

2104

2504

2104

2504

mm

Overall height of test frame, max. (F)

906

1306

906

1306

mm

Overall height of test frame with support legs, max. (B)

945

1345

945

1345

mm

Overall width of load frame

665

665

665

665

mm

Total depth of load frame

525

525

525

525

mm

Column diameter

65

65

65

65

mm

Frame stiffness at 500 mm crosshead separation

25

40

25

40

kN/mm

Height, base (G)

692

692

692

692

mm

Width, base

800

800

800

800

mm

Depth, base

700

700

700

700

mm

Total weight[5]

210

270

210

270

kg

Working area

Working area width

460

460

460

460

mm

Working area height w/o load cell, max. (D)[4] [6]

640

1040

640

1040

mm

Working area height with load cell, max. (C)[4] [6]

550

950

550

950

mm

Top crosshead adjustment

Motorized

Top crosshead clamping

Manual

Crosshead clamping electrically monitored

Yes, with signal indicator

  1. Extended load frame (required for use with a temperature chamber)
  1. Depending on load ratio (r-ratio) and test amplitude
  1. Depending on output required, environment, testing arrangement, testing type, frequency and specimen type. Measured at 1m distance, free field, analog to DIN EN ISO 11205
  1. Highest crosshead position
  1. Testing machine only, w/o electrical cabinet, accessories and options
  1. Median piston position

LTM 3 / 3 HR

Type

LTM 3           Standard

LTM 3             + 170 mm[1]

LTM 3 HR    Standard

LTM 3 HR     + 170 mm[1]

Item No.

1045235

1053564

1056879

1058953

Fmax, dynamic

± 3000

± 3000

± 3000

± 3000

N

Fmax, static continuous

± 2300

± 2300

± 2300

± 2300

N

Piston stroke

60

60

60

60

mm

Positioning and repeat accuracy

± 2

± 2

± 2

± 2

μm

Speed range

1.0

1.0

2

2

m/s

Maximum frequency[2]

100

100

120

120

Hz

Noise level at 1 meter distance, max.[3]

< 63

< 63

< 63

< 63

dB(A)

Noise level at 1 meter distance, typically[3]

< 46

< 46

< 46

< 46

dB(A)

Load frame

Overall height of testing machine, max. (A)[4]

1765

1935

1765

1935

mm

Overall height of testing machine with Base option, max. (E)[4]

2414

2584

2414

2584

mm

Overall height of test frame, max. (F)

945

1345

945

1345

mm

Overall height of test frame with support legs, max. (B)

986

1386

986

1386

mm

Overall width of load frame

665

665

665

665

mm

Total depth of load frame

525

525

525

525

mm

Column diameter

65

65

65

65

mm

Frame stiffness at 500 mm crosshead separation

40

40

40

40

kN/mm

Base height (G)

692

692

692

692

mm

Width, base

800

800

800

800

mm

Depth, base

700

700

700

700

mm

Total weight[5]

305

310

305

310

kg

Working area

Working area width

460

460

460

460

mm

Working area height w/o load cell, max. (D)[4] [6]

870

1040

870

1040

mm

Working area height w/o load cell, max. (C)[4] [6]

550

950

550

950

mm

Top crosshead adjustment

Motorized

Top crosshead clamping

Manual

Crosshead clamping electrically monitored

Yes, with signal indicator

  1. Extended load frame (required for use with a temperature chamber)
  1. Depending on load ratio (r-ratio) and test amplitude
  1. Depending on output required, environment, testing arrangement, testing type, frequency and specimen type. Measured at 1m distance, free field, analog to DIN EN ISO 11205
  1. Highest crosshead position
  1. Testing machine only, w/o electrical cabinet, accessories and options
  1. Median piston position

LTM 5/10 

Tipo

LTM 5

LTM 5           + 250 mm[1]

LTM 10

LTM 10           + 250 mm[1]

Articolo no.

1008107

3001848

1008108

3001847

Fmax, dinamico

±5

±5

±10

±10

kN

Fmax, statico continuo

±3,5

±3,5

±7

±7

kN

Corsa del pistone

60

60

60

60

mm

Posizionamento, accuratezza ripetizione

±2

±2

±2

±2

μm

Range velocità

1

1

1

1

mm/min

 

1,5

1,5

1,0

1,0

m/s

Frequenza massima[2]

100

100

100

100

Hz

Telaio di carico

Rigidità del telaio di carico a 1000mm separazione traversa

300

kN/mm

Altezza massima della macchina di prova (A)[3]

2510

2760

2715

2965

mm

Altezza massima del telaio di prova (B)

1980

2230

1980

2230

mm

Larghezza totale

860

860

860

860

mm

Profondità totale

850

850

850

850

mm

Altezza della piastra di montaggio (C)

720

720

720

720

mm

Diametro colonna

65

65

65

65

mm

Altezza area di prova, max (D)[3]

1106

1356

1106

1356

mm

Rigidità del telaio di carico a 1000mm separazione traversa

300

300

300

300

kN/mm

Peso totale[4]

941

966

1040

1065

kg

Area di lavoro

Larghezza area di lavoro

460

460

460

460

mm

Larghezza massima area di lavoro senza cella di carico (E)[3] [5]

920

1170

920

1170

mm

Altezza massima area di lavoro con cella di carico (F)[3] [5]

781

1031

781

1031

mm

Regolazione traversa superiore

Motorizzata

Bloccaggio traversa superiore

Manuale

Bloccaggio traversa controllato elettricamente

Sì, con indicatore di segnale

  1. Telaio di carico esteso (necessario con camera climatica)
  1. A seconda del rapporto di carico (r-ratio) e dell'ampiezza di prova
  1. Posizione traversa più alta
  1. Solo macchina di prova, senza cabinet elettrico, accessori e opzioni
  1. Posizione media pistone

Design

Layout elektro-dynamische Prüfmaschine LTM

LTM 1/2/3 design

elettronica di misurazione e controllo testControl II

elettronica di misurazione e controllo testControl II

Frequenza

10 kHz

Acquisizione valore misurato

10 kHz, 24 bits, aritmetico

Slot

5 x module bus

Interfaccia PC

EtherCat Gigabit

Concetto di sicurezza integrato:

- Specifica per massima sicurezza a 2 canali

 

- interfaccia per porte di sicurezza interbloccate

 

- Collegamento Stop di Emergenza

Telecomando ergonomico con display

modalità setup o di prova

 

- Pulsante Stop di Emergenza

 

Interruttore per selezione di modalità SETUP e TEST.

Dimensioni

Altezza

750

mm

Larghezza

600

mm

Profondità

600

mm

Peso, circa

102

kg

Lunghezza cavo tra LTM & testControl II

500

mm

Classe di protezione

IP 54

La sicurezza e l'affidabilità dei prodotti medicali sono migliorate grazie alla tecnologia di prova innovativa

Le prove di fatica sono un elemento essenziale per lo sviluppo di protesi resistenti, sicure e affidabili. I prototipi sono sottoposti a svariate prove prima di entrare nel processo di validazione; Komet Medical, la divisione chirurgica di Gebr. Brasseler con sede a Lemgo, Germania, utilizza una macchina di prova ZwickRoell con azionamento lineare per questi test.
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