Catalogues - minimal-quantity-lubrication

Catalogue Minimal Quantity Lubrication

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INTERNAL MINIMUM QUANTITY LUBRIFICATION FROM GAT. SYSTEMATICALLY REACHING ITS TARGET.

ROTOJET I:

Generation of the mixture inside the spindle

Separate adjustment for the lubricating medium quantity, adjustment via the machine control

Control and monitoring of the MQL (filling level, compressed air)

Option of feeding emulsion provided a suitable rotary union is installed Blowing-out of the tool holder with dry air

The novel technology of „dry machining using internal minimum quantity lubrication" (MQL) is currently receiving a lot of attention. This complete system offers companies in the metal machining industry a technological, economical and ecological alternative.

Internal minimum quantity lubrication with generation of the air/lubricating medium mixture inside the spindle. The

Note: A new set-up is necessary

► Rapid reaction and availability of the medium at air and the lubricating medium are fed separately into the

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periods of standstill No dripping after machining Low degree of atomization

after longer spindle and then mixed just before they enter the tool. The

mixture is then fed through the tool to the machining location.

As an alternative to wet machining, Jnternal minimum quantity lubrication" through the tool during machining offers great advantages to the user. Instead of cooling, as during wet machining (95% water, 5% oil), the frictional heat is reduced. This is achieved by producing a thin film of lubricating oil between the tool and the work piece, the tool and the chips and the work piece and the chips.

The lubricating mixture is fed to the friction points through the tool so that the consumption of air and lubricating medium is kept to a very low value:

Air: 2-10 Nm³/h, 1-5 bar {70 ft³-353 ft³;14-72 psi) Lubricating medium: 10-100 ml/h (0,3 fl.oz-3,3 fl.oz)

(5)

The ability to finely adjust the air pressure prevents the lubricating medium from becoming being atomized. Instead droplets stick to the tool.

GAT offers two different MQL systems:

ROTOJET A: Generation of the mixture outside the spindle and feed through the spindle

(I)

(3)

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(2)

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spindle

n of the mixture inside the

ROTOJET A

Rotating union (I) Tool (2) Tube (3) Supply Unit (4)

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ROTOJET A:

Generation of the mixture outside the spindle

The mixture is generated in the supply unit [industrial booster (4)] and the mixture is routed via the rotary union (1) through the spindle (3) to the tool (2). The supply unit (4) is a modular system. Based on a standard unit, the device can be extended to supply several points requiring lubrication. For the supply unit, see the inserted sheet.

The advantages of this method are:

Can be retrofitted into machines with internal coolant feed.

Internal coolant feed can continue to be used Very suitable for multiple spindle heads and transfer machines ► Low cost and simple Installation

(6)

The advantages are obvious:

(4)

From the supply unit (4), the air and lubricating medium are fed separately through rotating unions (1) and a tube (3) to a mixing chamber (5). The mixture is fed centrally through the clamping mechanism (6) into the tool holder and the tool (2).

ROTOJET I

Rotating Union (I) Tool (2) Tube (3) Supply unit (4) Mixing chamber (5) Clamping system (6)

Clean environment ^ Low consumption of lubricating medium

► Dry chip

No disposal problem with the chip p~ Zero cooling agent costs Improved surface

► Reduction in causes of illness Increased tool life

Clean machines

The GAT MQL system fulfils all the requirements for a set-up pointing the way into the future:

Able to be used with new machines Installable on existing machines Separate adjustment for air pressure and air quantity

Advantages:

Supply Unit

No separation of the mixture

The mixture is immediately available due to the short

distances

► Option of feeding dry air

► Very fine adjustment of air and lubricating medium possible

No dripping after machining

GAT

Gesellschaft für Antriebstechnik mbH