ACM UKAS logoIMMG is specialized in the design and manufacture of precision state – of – the – art mechanical parts, equipment and machines. The manufacturing methods used include machining, casting, sintering, cold forming and welding. The range of materials used is wide, starting from ordinary construction steels and cast irons to tool steels, stainless steels, non ferrous alloys such as aluminium, titanium, magnesium and copper alloys, alloys such as aluminium, titanium, magnesium and copper alloys, plastics, composite materials (GFRPs) and ceramic materials.

Manufacturing:

Turning (5axis CNC lathe), Milling (5 - axis DECKEL MAHO CNC vertical machining centre and 3-Axis OKUMA), Boring, Drilling & reaming, tapping & threading, Edge milling, Curving, Plate bending, Beam curving rolls, Plate straightening rolls.

Design capabilities :

  • CAD software with specially developed libraries, suitable for designing very complex parts and assemblies.
  • F.E.A. software able to perform static, dynamic, thermal or combined analysis on any geometry.
  • Specially developed algorithms for structural optimisation.

Metal joining :

TIG and MIG welding, Brazing

GFRP and CFRP joining:

Use of suitable adhesives, rotating tables, jigs and laser position control set – up.

Assembly and cleaning :

Cleanroon assembly, Aqueous cleaning.

Alignment

A high accuracy, computer controlled laser alignment system, suitable for precise alignment of planar or circular components up to 16 m long.

Testing :

Unique capability to perform high accuracy cryo-thermo-mechanical tests on the manufactured structures.
Uniaxial, biaxial, creep - fatigue tests on all material categories.

Inspection equipment:

  • Prototype coordinate measuring machine (1000 mm x 500 mm x 300 mm), with an optical measuring system suitable for crack detection and length measurement.
  • TESA Micro – Hite 3D
  • A three – dimensional coordinate measuring machine (450 X 510 X 420 mm, resolution 1µm), capable to take complex part measurements, incorporating the powerful PC-DMIS software. Full programming environment supporting over 10.000 inspection routines
  • Helium leak detectors units.

Quality Control:

IMMG S.A. operates under a quality assurance system that includes both the laboratory and the industrial part of the company. This system has been certified to be in compliance with the ISO 9001: 2000 and the EN 45001 (ISO/IEC 17025) Quality Standard by the Greek National Council for Accreditation (ESYD).

Electrical and electronic devices design - manufacturing, especially for the testing machines.

These devices include:

  • Analogue circuits for sensor and transducer interfacing (for strain gauges, load cells, pressure transducers, LVDTs, Hall effect sensors, thermocouples, cryogenic temperature sensors).
  • Galvanic isolators for analogue signal measurement and driving power circuits.
  • Digital interfaces for measurement and automation (incremental linear and rotary encoders, remote controls, analogue multiplexers for large input count).
  • Power circuits (On/Off, PWM furnace controls, PWM for motors, high voltage linear and PWM servoamplifiers for driving piezoelectric actuators).

CASE STUDIES

case study DIRIS PANELThe DIRIS architecture – (DIrectional, Reinforced, Integrated, Stretched, Single yarn), European Patent 08386002, was applied to manufacture and test a carbon fibre reinforced PEEK panel simulating a spacecraft basement. The project was supported by ESA (2008). The DIRIS core and panel exhibit the highest strength in shear and tension in in-plane and out-of-plane loading. 

 

 

 

 


case study1

Design – Construction of 36 CFRP platforms (2004) for mounting and aligning optical and muon detectors of the CMS Experiment at CERN, Geneva.

These carbon fiber reinforced epoxy structures consist of hollow square tubes (made by pultrusion) and plates, precisely machined and bonded (60 µ m thickness) with an exceptional assembly precision. The dimensions were 4 X 1,8 X 0,05 m, the maximum flatness and alignment tolerance was less than 0.03 mm/m and stiffness in the order of 115 GPa.


case study2The Pole Measuring Machine (2000) was designed and constructed for CERN. A large, robotic, traveling, 5-axis machine for testing superconducting magnetic coils, 16 meters long. The two loading machines generate combined loading (up to 480 Tons), including bending. They composed of more than 2000 precisely machined parts, 45 sensors and a control cabinet with specially developed hardware and software. The critical components of the machines were optimized using suitable numerical techniques (including FEA).


case study3

Construction of an optical control unit for the LEOPARD II Main Battle Tank.
The unit consists of a trapezoidal shell (500 x 400 x 300 mm) of a complex shape and many parts inside made of materials ranging from cast aluminum to cast stainless steels and tungsten. The achieved dimensional and forms accuracies are in the order of 20 µ m / 400 mm and for a few parts even less.

 


MACHINING CENTRES AT THE WORKSHOP

MAHOA 5-axis new milling machine, suitable for high precision machining of complicated geometry parts (Deckel Maho Gildemeister 50).

 

 

 

 

 

 

okumaA 3-axis milling machine for accurate machining of light and heavy parts (OKUMA MX45).

 

 

 

 

 

 

 

GILDEMEISTERA 5-axis turning centre for simple and sofisticated machining (Gieldemeister CTX400, CNC Lathe).

 

 

 

 

 

 

ANN YANGA 2-axis numerical control lathe, suitable for special applications (Ann Young).

 

 

 

 

 

 

 


MEASURING DEVICES FOR INSPECTION

example2A Coordinate Measuring Machine (1500 x 500 x 500 mm) combining an electronic probe (1 µm), a laser displacement transducer (0.02 µ m) and an optical measuring system suitable for length measurement and crack detection.