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.

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News

07.05.2019

DLR in Braunschweig relies on ZwickRoell for material characterization
26.04.2019

ZwickRoell provides dynamic testing machine to ThyssenKrupp Presta

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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.

Video⁽³⁾

2:17

Customer Case

Customer Case - DLR
1:45

Fatigue test on spinal implants

Fatigue testing of spinal implants to ASTM F1717-09 with electrodynamic testing machine LTM
1:51

LTM electrodynamic testing machine

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

Extended load frame (required for use with a temperature chamber)

Depending on load ratio (r-ratio) and test amplitude

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

Highest crosshead position

Testing machine only, w/o electrical cabinet, accessories and options

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

Extended load frame (required for use with a temperature chamber)

Depending on load ratio (r-ratio) and test amplitude

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

Highest crosshead position

Testing machine only, w/o electrical cabinet, accessories and options

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

Extended load frame (required for use with a temperature chamber)

Depending on load ratio (r-ratio) and test amplitude

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

Highest crosshead position

Testing machine only, w/o electrical cabinet, accessories and options

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

Telaio di carico esteso (necessario con camera climatica)

A seconda del rapporto di carico (r-ratio) e dell'ampiezza di prova

Posizione traversa più alta

Solo macchina di prova, senza cabinet elettrico, accessori e opzioni

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

Typical Applications in the Medical Industry⁽⁸⁾

Dispositivo per prove su protesi dell'anca

Per prove secondo la ISO 7206-4, ISO 7206-6, ISO 7206-8 e ASTM F2068

Dispositivo per prove su protesi dell'anca

Per prove secondo la ISO 7206-4, ISO 7206-6, ISO 7206-8 e ASTM F2068
Dispositivo per prove su impianti dentali

Per prove secondo la ISO 14801

Dispositivo per prove su impianti dentali

Per prove secondo la ISO 14801
Text fixture for bone plates

For determination of the static and dynamic strength of bone plates using a 4-point flexure test to ASTM F382 and ISO 9585.

More information

Text fixture for bone plates

For determination of the static and dynamic strength of bone plates using a 4-point flexure test to ASTM F382 and ISO 9585.

More information
Test fixture for tibial trays

For fatigue testing of tibial trays under unilateral pulsating compressive loading to ASTM F1800 and ISO 14879.

More information

Test fixture for tibial trays

For fatigue testing of tibial trays under unilateral pulsating compressive loading to ASTM F1800 and ISO 14879.

More information
Dispositivo per prove su impianti spinali

Per prove secondo la ASTM F1717

Dispositivo per prove su impianti spinali

Per prove secondo la ASTM F1717
Dispositivo per prove su impianti spinali

Per prove secondo la ASTM F 2077

Dispositivo per prove su impianti spinali

Per prove secondo la ASTM F 2077
Test fixture for foot prostheses

For comprehensive fatigue testing of the structure of lower limb prostheses.

Test fixture for foot prostheses

For comprehensive fatigue testing of the structure of lower limb prostheses.
Test fixture for bone screws

For testing of medical bone screws to ASTM F543.

More information

Test fixture for bone screws

For testing of medical bone screws to ASTM F543.

More information

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.