Máquina de ensayos electrodinámica LTM

Las máquinas de ensayos electrodinámicas se emplean para determinar la resistencia a la fatiga de materiales y componentes en el área de vida y límite de fatiga. Gracias a la tecnología de accionamiento libre de aceite, así como de su fácil instalación es ideal para aplicaciones en la industria médica, así como para la investigación y la docencia. Los ejemplos típicos son ensayos de prótesis de cadera, rodilla o implantes dentales. Otros campos de aplicación son los ensayos en probetas normalizadas de materiales plásticos y materiales compuestos, así como probetas CT y SEB de aluminio y plástico. Actualmente, la serie de máquinas de ensayo dinámicas LTM está disponible con fuerzas de ± 5 y ± 10 kN y con un recorrido de pistón de 60 mm.

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

Las frecuencias de ensayo que, dependiendo del ensayo llegan hasta 100 Hz, garantizan unos tiempos de ensayo cortos y, con ello, un gran volumen de probetas.

El motor lineal no requiere la conexión de medios adicionales tales como un sistema neumático, agua de refrigeración o aceite, lo que reduce los costes de mantenimiento e instalación.

Se maneja mediante el software de ensayos testXpert® R para ensayos dinámicos y testXpert® II para ensayos estáticos. El software es intuitivo y adaptado específicamente a las tareas de ensayo.

Los componentes libres de desgaste garantizan una operación sin mantenimiento.

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.

Descripción técnica

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 / LTM 10 

Tipo

LTM 5

LTM 5           + 250 mm[1]

LTM 10

LTM 10           + 250 mm[1]

N.º artículo

1008107

3001848

1008108

3001847

Fmáx., dinámica

± 5

± 5

± 10

± 10

kN

Fmáx., estática permanente

± 3,5

± 3,5

± 7

± 7

kN

Carrera pistón

60

60

60

60

mm

Precisión de posicionado y de repetibilidad

± 2

±2

± 2

±2

μm

Rango de velocidades

1

1

1

1

mm/min

 

1,5

1,5

1,0

1,0

m/s

Frecuencia máxima[2]

100

100

100

100

Hz

Bastidor de carga

Rigidez del bastidor a 1000 mm de distancia de travesaño

300

kN/mm

Altura total máx. de la máquina de ensayos (A)[3]

2510

2760

2715

2965

mm

Altura total máx. del bastidor de ensayos (B)

1980

2230

1980

2230

mm

Ancho total

860

860

860

860

mm

Fondo total

850

850

850

850

mm

Altura mesa de sujeción (C)

720

720

720

720

mm

Diámetro de columna

65

65

65

65

mm

Altura máx. del área de ensayo (D)[3]

1106

1356

1106

1356

mm

Rigidez del bastidor a 1000 mm de distancia de travesaño

300

300

300

300

kN/mm

Peso total[4]

941

966

1040

1065

kg

Zona de trabajo

Ancho zona de trabajo

460

460

460

460

mm

Altura máx. zona trabajo sin captador de fuerza (E)[3] [5]

920

1170

920

1170

mm

Altura máx. zona trabajo con captador de fuerza (E)[3] [5]

781

1031

781

1031

mm

Ajuste travesaño superior

motorizado

Fijación travesaño superior

manualmente

Fijación del travesaño con control eléctrico

Sí, con indicador de señal

  1. Bastidor de carga ampliado, necesario en caso de usar cámara de temperatura
  1. dependiendo de la relación de carga (relación de carga r) y de la amplitud de ensayo
  1. Posición máxima del travesaño
  1. Solo máquina de ensayos, sin armario eléctrico, herramientas ni opciones
  1. Posición media del pistón

Esquema

LTM 1/2/3 design

Electrónica de medición, control y regulación testControl II

Electrónica de medición, control y regulación testControl II

Frecuencia de regulación

10 kHz

Adquisición de datos de medición

10 kHz, 24 bit, aritmética

Ranuras

5 x módulo bus

Puerto PC

GigaBit Ethernet

Concepto de seguridad integrado

- Ejecución de 2 canales para máxima seguridad

 

- Puerto para puertas de protección bloqueables

 

- Interfaz cadena de parada de emergencia

Control remoto con pantalla

- Modo de verificación o de ensayo

 

- Botón de parada de emergencia

 

- Interruptor de llave para conmutar entre los modos Verificación y Ensayo

Dimensiones

Altura

750

mm

Ancho

600

mm

Fondo

600

mm

Peso aprox.

102

kg

Longitud de cable entre LTM y testControl II

500

mm

Clase de protección

IP 54

Productos médicos más seguros gracias a la innovadora tecnología de ensayos

Los ensayos de fatiga constituyen un elemento esencial para el desarrollo de implantes seguros, fiables y duraderos. Los prototipos se someten a exhaustivos ensayos antes de pasar al proceso de validación. Komet Medical, la división quirúrgica de la compañía Gebr. Brasseler con sede en Lemgo (Alemania), apuesta por una máquina de ensayos de ZwickRoell con accionamiento lineal para realizar estos ensayos. 
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