GUMMI-METALL-TECHNIK GMBH

AIRCRAFT COMPONENTS

THIS CATALOGUE INCLUDES INFORMATION ABOUT GMT GMBH GMT-TIE RODS

AIRCRAFT SECTOR GMT-SHOCK MOUNTS

TEST LABORATORIES HOSE MOUNTINGS AND FASTENERS

TIE ROD ASSEMBLY AND TESTING GMT-MF-AND IS-ELEMENTS

CERTIFIED QUALITY AND ENVIRONMENTAL MANAGEMENT CFK-PARTS

GMT-STANDARDS IN AEROSPACE TESTING OF GMT-STRUTS SELECTION OF AIRCRAFT COMPONENTS BREAKING TEST AGGREGATE BEARING

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1. About GMT group 1.1 More than forty years of experience GMT with its headquarters in Bühl (Germany) was founded by Chief Executive Officer Gerhard Engstler in 1968. Today GMT is composed of production plants in Germany, Switzerland, Ireland, the United States, Malaysia and India and has sales branches and representatives all over the world. Due to a global network connecting GMT plants and sales offices world-wide there is a constant flow of information and know-how throughout the group. This enables GMT to solve technical problems quickly and efficiently. Response and reaction time in cases of special customer inquiry can also be reduced to a minimum. These are some of the reasons why GMT is one of the world leaders in the field of sound and vibration dampening technology. A wide spread variety of products from simple machine feet up to high tech parts for well-known manufacturers in the railway, shipbuilding and aerospace industries allows GMT to meet the most challenging customer’s requests and wishes. Generally GMT products can be used wherever noise or vibrations occur. All GMT parts are manufactured to the highest quality standards. The production plants are certified acc. to European standard DIN EN ISO 9001. 1.2 Aircraft components Mechanical vibrations and impact stress are the biggest problems for e.g. engines and electronic equipment onboard aircrafts. Therefore very specific noise and vibration isolating systems have to be used to isolate these kinds of machines from vibrations. GMT designs special purpose shock mounts offering high deflection whilst being able to absorb shock loads. Mountings with incorporated rebound control features reduce excessive movement under shock loads. GMT also is specialised in tie rods and struts to connect the (interior) monuments to the frame. In the production of aircraft components GMT follows the specifications of the German Industry Standard for rubber compounds in the aircraft technology as well as the DASA standards. GMT aircraft components can also be non-inflammable as requested in the different norms. 1.3 Turnover history (millions €)

0

20

40

60

80

100

120

1994 1998 2002 2004 2006 2008 2010

GMT Buehl

GMT Group

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2. Aircraft sector The past years were affected by a rapid change in technology, by vital modifications in design and layout as well as by modernisation and restructuring of the manufacturing conditions. GMT GmbH has adapted itself to the progressive developments. The aviation segment has been newly-arranged and expanded by establishing separate spaces with special equipment for production, assembly and storing. The process flow has been oriented towards modern and rational structures.

3. Test laboratories

4. Assembly departments

Glueing

Assembly

Testing

Plant V

Multi-axial test centre

Climatic dynamic test centre

Tie rod test

Tie rod test

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5. Certified quality and environmental management GMT Buhl

Certified quality management GMT Austria for production of shock-mounts and restraint systems for aviation

6. GMT-standards in aerospace

• DIN EN 9100 aerospace series, quality management system /2003 Requirements and Quality systems Module for quality assurance in design, development, production, installation and servicing

• DIN EN 9102 Aerospace series, Quality management system–First article inspection/2001 • DIN EN 9130 Aerospace series, Quality management system–Record retention/2000 • DIN EN 9131 – Nonconformance documentation/Apr. 2002 • DIN EN 9103 Aerospace series, Quality management systems-Variation management of

key characteristics/Feb 2002 • LN 9108 Aerospace series elastomer plates, panels/2000 • AMS 3260B Aerospace material specification/2001 • QSFA

7. Selection of aircraft components

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8. GMT-Tie rods Description of parts and functions: Tie Rods are to be used in airplanes in different locations to absorb vibration frequencies and to reduce shocks to the structure. Walls, galleys, toilets and hatracks and other monuments are normally attached on the upper sides to the aircraft by tie rods. Depending on the required loads and the weight the material can vary from:

1. Aluminium 2. Titanium 3. Stainless Steel 4. Further materials due to special (weight) requirements (CFK)

Due to minimum weight in aircraft design it is necessary to select the required size, length and diameter together with the costumer. All materials are approved in aircraft design and provide corrosion free interface. The Tie Rods can be qualified upon costumer requests. Modular System: Owing to special construction of Tie Rods it is possible to combine wide variety of rod ends and fork ends with different rod bodies. Result is a modular design able to meet different demands individually.

Comment: Rod body of Type A and Type B can be changed in CFK (see page 9 “Light weight

OHSC).

8.1 Type A Depending on design of component tensile forces of up to 50kN are possible. For detailed technical information please contact the technical department of GMT.

Type B Type C Type A

Rod body of aluminium, CFK

Fork or rod end of aluminium or stainless steel

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Components and their function Locking device Acc. to NAS1193 Together with NAS509 for positive locking of rod ends.

8.2 Type B Depending on design of component tensile forces of up to 35kN are possible. For detailed technical information please contact the technical department of GMT.

Plastic insert Aids in transmission of loads . Plastic prevents corrosion in thread and acts as an insulator.

2.1

Nut, drilled jam Acc. to NAS509. Locking device for positive locking of rod end terminals to rod ends.

2.3

Safety ring Prevents and controls too far turning off the thread.

2.4

2.2

Rod end

Fork or rod end of aluminium or stainless steel

Rod body of aluminium, CFK

Components and their function

Fork end

2.1

2.4

2.2

2.6

2.3

2

2.5

Fork end

2.1

2.4

2.2

2.6

2.3

2

2.5

Rod end

Plastic insert Aids in transmission of loads. Plastic prevents corrosion in thread and acts as an insulator.

Locking clip Quick-locking mechanism for assembly by hand. Serves as anti-twist plate and aids in transmission of loads.

2.2

2.4

2.5

Titanium bushes - Aids better load transmission. - Higher surface pressure possible. - Through change of geometry (boring/width) modular structure with same geometry of fork possible.

Spring Links threads of threaded sleeve and fork end against each other and prevents any thread play.

2.1

Fork end

2.12.2

2.4

2.3

Fork end

Rubber ring Prevents penetration of water and dust into rod assembly.

2.3

2.6 Safety ring Prevents and controls too far turning off the thread.

Fork end

2,3

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8.3 Type A, B (CFK Tie Rod) Depending on design of component tensile forces of up to 35kN are possible. For detailed technical information please contact the technical department of GMT. Comment: Owing to change from aluminium to CFK rod body weight of Tie Rod decreases considerably (30 – 35 %). For components and their function please refer to Tie Rod Type B. 8.4 Type C Depending on design of component tensile forces of up to 10kN are possible. For detailed technical information please contact the technical department of GMT. Special construction for particularly short design. Components and their function

9. GMT-Shock mounts and Fasteners Description of parts and functions: Shock mounts are different elements to connect two units or to install one unit into a system. The design of these shock mounts is a result of the development considering the space, the technical characteristics and requirements (load, frequencies, amplitudes, max. load, etc.) as well as the surrounding conditions. The following shock mounts are examples for this description.

Rod body of aluminium

Rod end of stainless steel

Fork end of aluminium

3

1

2

1

Metallic insert: Makes transmission of high tension/compressive loads in thread possible and prevents contact between stainless steel rod end and aluminium fork end in the thread.

Rubber sealing: Prevents penetration of water and dust into the thread.

Titanium bushes: - Aids better load transmission. - Higher surface pressure possible. - Through change of geometry (boring / width) modular structure with same geometry of fork possible. Fork end

2

4

4

Rod body of CFK

anged into

can be changed into

3

Rod body of CFK Rod body of aluminium

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9.1 Example A: Suspension crew rest compartment 9.2 Example B

9.3 Example C

Example of use: Suspension hat rack Function: • Elastic hat rack suspension • „Fail Save" function referring to radial and axial load

Function: • Light weight shockmount • Elastic hat rack suspension • „Fail Save" function compared to radial and axial load

Mount YZ complete

Mount X complete

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version 1 version 2 version 3

Function: • Elastic hat rack suspension • „Fail Save" function referring to radial and axial load

version 4

stainless steel

aluminium

silicone rubber

Conical rubber insert for shockmount FEM-analysis

Assembled Shock mounts:

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9.4 Example D For suspension of cabin interiors as for example side walls fasteners. Function: • elastic bearing of linings in passenger cabin • noise reductions by isolation 9.5 Example E: Window Fastener

10. Hose mountings Hose mountings are installed in various kinds of aircrafts in order to settle important junction cables and interposition trunks properly. For detailed technical information please contact the technical department of GMT.

silicone

aluminium

stainless steel

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current design new design

version 1 version 2

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11. GMT-MF-elements Description of parts and functions: GMT-MF elements are used for the bedding and structure-borne noise insulation of equipment and aggregates in mobile or stationary applications, for example in vehicles, ships or airplanes. Thanks to their form-fitting design they are tear-proof. The elastomer and metal parts are not bonded. The MF elements can withstand any load resulting from pressure, tension or thrust. However, their polydirectional elasticity also allows for a combination of loads. Their vibration-insulating and shock-absorbing properties are effective in a temperature range from – 25°C to + 80°C when a standard elastomer is used; with a highly damping elastomer that range would even be – 50°C to + 180°C. Standard material: -zinc-coated metal parts -age and oil-resistant elastomer Products can be provided in different dimensions.

12. GMT-IS-elements Description of parts and functions: GMT IS-elements are used for bedding of equipment and aggregates as well as for stationary applications. The positive structure makes these elements tear-proof. The elastomer is age- and oil-resistant and is not attached to the metal parts by vulcanisation. Highly damping elastomers may also be used. The nearly identical allround elasticity is a further advantage for the application as vibration-insulating element or shock absorber. - Standard elastomer : -25°C to + 80°C; - Hi-damp elastomer : -50°C to +180°C; - optionally 40, 50,60 or 70 Sh-A Products can be provided in different dimensions.

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13. CFK-products

Rod end out of carbon fibre material

Diameter 500 mm

Length up to 1500 mm

Length up to 480mm Diameter up to 18mm Weight : 100 gr

Length up to 1900mm

Diameter 2,5mm, 4,5 or 5,0 mm

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AZ003492 AZ003495

AZ003493

The latest prototype of GMT is a pipe which has completely been manufactured out of carbon fibre material. Also attaching of connecting threads as well as fastening sleeves are based on carbon fibre. Reduction of weight compared to usual pipes is approx. 40%. This pipe shall be applied in different pipelines all over the world. Resistance against oil, petrol, water or brake fluids has been tested successfully. Used manufacturing process corresponds to Tie Rod manufacturing process for aircraft industry. However, respective tool shafts had to be manufactured. These tool shafts have been manufactured under consideration of parallelism, diameter and handling.

Inner diameter 500mm, length of the two connection pieces 3500mm.

Connection is realised by flange and threads in carbon fibre.

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14. TESTING OF GMT-STRUTS 14.1 Survey of manufacturing and testing process

Combined load test struts Item has been loaded dynamically in phase, path measurement has been realised by a meter at component centre. Test parameter: Axial compressive force: ML 10.3kN±0.5kN / lateral force 1 – 32 kN

winding-up on steel shaft

vertical redundancy check Impact

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14.2 Ultrasonic Testing of Struts

By means of ultrasonic testing the laminate quality as well as the effect of impact damage on the laminate structure is inspected.

Ultrasonic wave propagation

Scan types

C-Scan of defect free CFK-material

C-Scan of CFK-material with laminate defect

Ultrasonic scanner with MD-strut

Water chamber attached at ultrasonic scanner

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15. Breaking Test Aggregate bearing PARAMETER Carbon fibre aggregate bearing Method: testing till break Speed cycle: 15mm/min Preload: 100 N TEST RESULTS

No Trial W

Nm Fmax

kN

L at Fmax mm

F 2 mm kN

F 4 mm kN

F 6 mm kN

F 10 mm kN

F 12 mm kN

F 15 mm kN

F 20 mm kN

F 22 mm kN

1 T.1 76,52 7,99 10,45 0,69 2,45 4,41 7,63 6,57 7,81 - -

2 T.1

repeat 211,16 14,04 21,52 1,78 3,93 5,89 9,24 10,45 11,68 13,78 12,09

Compression characteristic curve

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GMT Production plants GMT Sales offices

SWITZERLAND USA FRANCE GUMETA AG GMT INTERNATIONAL CORP. GMT FRANCE Kautschuk-Werk Villa Industrial Park Z. l Ste Agathe – Rue Paul Langevin Buchrainstraße 2 P.O. Box 117 BP 10049 6030 Ebikon Villa Rica 57192 Florange Cedex Tel. +41 (0) 41/4 40 17 17 Georgia 30180 Tel. +33 (0)3/82 59 33 90 Fax +41 (0) 41/4 40 50 60 Tel. +1/770/4 59-57 57 Fax +33 (0)3/82 59 33 99 E-Mail : info@gumeta.ch Fax +1/770/4 59-09 57 E-Mail : info@gmt-france.fr E-Mail: gmt@gmt-international.com

MALAYSIA INDIA BELGIUM

GMT (M) SDN.BHD. GMT INDIA PVT. LTD. GMT BELGIUM S.A./N.V. P.O. Box 82 Plot No. 27C, KIADB Industrial Area Chaussée de Louvain 165 Industrial Estate Off. Bangalore – Mysore Highway 5310 Eghezée 33000 Kuala Kangsar Bidadi,Bangalore-562109 Tel. +32 (0)81/81 14 40 Perak Tel. +9180 66961500 to 507 Fax +32 (0)81/81 24 40 Tel. +60(0)5/77 61 742 Fax +9180 66961509 E-Mail: info@gmt-belgium.be Fax +60(0)5/77 65 700 E-Mail: info@gmtindia.in E-Mail: info@gmt.com.my

AUSTRIA CHINA ENGLAND

GMT GUMMI-METALL-TECHNIK GMT GUMMI-METALL-TECHNIK GMT RUBBER-METAL-TECHNIC LTD. GMBH (TIANJIN) CO. LTD. The Sidings Teufligen 4 Jimei Industrial Park 19A Station Road 4872 Neukirchen a. d. Vöckla Xiqing Economic Development Area Guiseley, Leeds, LS20 8BX Tel. +43 (0) 76 82 40 55 1-11 300385 Tianjin West Yorkshire Fax +43 (0) 76 82 40 55 1-99 Tel. +86 (0) 22/2388 8168 Tel. +44 (0)19 43/87 06 70 E-Mail: austria@gmt-gmbh.com E-Mail: info@gmt-china.cn Fax +44 (0)19 43/87 06 31 E-Mail: sales@gmt.gb.com

REPUBLIC OF IRELAND

GMT IRELAND LTD. Clifden Co. Galway Tel. +353 (0)95/2 13 82 Fax +353 (0)95/2 17 04 E-Mail: gmtirl@iol.ie

P.O. Box 1253 · D-77802 Bühl Liechtersmatten 5 Plant 1: Dr.-Georg-Schaeffler-Str. 24 ; Plant 2-4: Liechtersmatten 5; Plant 5: Erlenstraße 15 Tel. +49(0)72 23/8 04-0 · Fax +49(0)72 23/2 10 75 Internet: www.gmt-gmbh.de · E-Mail: info@gmt-gmbh.de

GUMMI-METALL-TECHNIK GmbH

D-77815 Bühl · Germany

TURKEY & MIDDLE EAST

BTK ENDÜSTR�YEL ÜRÜNLER�MALAT SAN. ve T�C. LTD. �T�.Tel. +90-312-397 04 31Fax.+90-312-397 04 51E-Mail: btk@btk.com.tr