DOCX《High Speed, but Gentle》

High Speed, but Gentle Ready-to-install handling photovoltaic solutions from a global player in automation Speed, precision and zero-defect quality C this is what Festo'

s handling solutions for the photovoltaic industry have to offer.

On its stand at the SNEC show

2012 in Shanghai, Festo, a global player in automation technology, will be showing its latest solutions for wafer, thin-film and roll-to-roll production. The stars of assembly automation on the Festo stand are a double-high-speed H-gantry with a Bernoulli gripper for the contactless gripping of solar cells, a sliding fork for loading and unloading glass substrates, the Bionic Handling Assistant and the topic energy efficiency . High-speed H-gantry The high-speed H-Gantry beats all previous speed records. Depending on the concept of the system, up to 5,000 wafers per hour can be repositioned. Long strokes, normal in the manufacture of solar cells, prevented high pick rates in the past. Doubling up on the kinematic mechanisms reduces the strokes and increases the throughput rate to the one pick per second demanded by the market. Festo has developed this high speed handling system for dynamic assembly operations in photovoltaics, electronics, small parts handling and all other applications where small and light mass-produced items need to be positioned fast and flexibly. This new 3D/planar surface gantry covers a significantly larger rectangular working area than robot systems with delta kinematic mechanisms, which can cover only circular or kidney-shaped areas. A further disadvantage of delta robots are their high cost, the mass of approximately

150 kg which needs to be installed and the large installation space which is required. Contactless gripping The Bernoulli gripper picks up workpieces such as silicon-based wafers by contactless means. In order to do this, an overpressure is created at the Bernoulli gripper itself, while at the same time a vacuum is generated at the surface to be gripped, thus causing the wafer to be drawn towards the gripper until there is equilibrium between the weight force, the force of the back pressure from the nozzle and the force of attraction resulting from the acceleration pulse of the fluid. During this process, a certain distance (approx. 0.5 mm to

3 mm) is maintained between the gripper and the gripping surface of the workpiece, so that the object is held in position without contact. 传真: +86-21-5854

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206 新闻稿 日期:2012/5/16 编号: CC/19/12 CC-R3/LLIU Sliding fork In the manufacture of thin film solar cells in the front-end area,

4 mm thick glass is fed into various process chambers and coated. This process area is under high vacuum and at a temperature of approx. 200°C. Traditionally, special clean-room robots have been used to transport the coated glass from one process chamber to the next. A less expensive and more compact alternative to these robots is the infinitely adjustable telescopic sliding fork handling system. Its telescope principle with a triple transmission ratio allows strokes of up to

2 m. The installation space required is governed by the workpiece size. There is a choice of drive types, with servo-pneumatic drives for high vacuum and electric drives for applications under atmospheric conditions. Air Bearing Photovoltaics and display substrates move gently thanks to the new Air Bearing transport system. Movement is contactless, precise and involves minimal air consumption, as the delicate glass substrates, while increasingly thin, are also larger, more complex and therefore more fragile. The use of electric roller drives to date often resulted in damage and dirt on the display substrates with subsequent high reject rates. As a contactless transport system, the Air Bearing pneumatic stepper drive is therefore superior to electric drives;