MEX 2017 Focus on clamping elements with anti-rotation pistons
At the Moulding Expo, Roemheld demonstrates the potential of clamping and handling technology for more productivity and efficiency in fabrication. For their first participation in the trade fair, the Group focuses on clamping elements with anti-rotation pistons to compensate side loads and torques.
Another trade fair premiere is the turning and tilting manipulator Centrick for ergonomic workpiece handling of weights of up to 2,000 kg. Moreover, the group of companies shows elements that can be flexibly used for set-up optimisation as well as the efficient change and transport of heavy dies and moulds. For this purpose, the RWA die-changing chart for the transport of loads of up to 1,600 kg is presented.
Because of their special design, the hydraulic polygon block cylinders are suitable as guiding elements for the operation of tools for joining, stamping and pressing. Thanks to a particularly stable bronze housing, the elements can be used at up to 500 bar, Roemheld says. The patented design with anti-rotation, polygonal piston rod and long guide bushing compensates torques and side loads. Additionally, the elements achieve high positioning precision of max. ±0.3° thanks to their low radial clearance.
The compact design allows the elements to be used in limited space without the need for an external guide. The piston position can be continuously monitored, and the strokes are adaptable.
Also, the Roemheld hydraulic and mini-slides are anti-rotation-protected. The compact, double-acting cylinders have four integrated guide rods that can compensate side loads and torques. Tools are mounted using a front block to the slides. The hydraulic cylinder with cushioning at the piston side and chromium-plated guide rods covers a large force range – from the smallest element with a push force of 0.5 kN at 10 bar and a piston diameter of 25 mm up to the 100-mm version with 196 kN at 250 bar. According to the company, the mini-slide can be used at up to 500 bar and achieves, depending on the size, a push force of 4.9 to 19.5 kN. The proven modulog series for handling technology that simplifies and ergonomically designs the manufacture and assembly is complemented by a new member – the turning and tilting manipulator Centrick, which can move loads of up to 2,000 kg. This is realised with a concept of cleverly arranged articulated arms that can endlessly and continuously rotate workpieces and tilt them up to 90°.
The innovative part is that the component is moved close to the centre of gravity, the height changes only insignificantly – a big advantage compared to conventional turning and tilting fixtures. In most cases, these have only one arm and swivel over a significantly larger travel; that’s why the working height varies more. The small swivel radius of Centrick also ensures very high stability. What's more, the compact, high-tech element is also displaceable. It can be moved, if required, and remains in a stable assembly position by way of a set of holding brakes.
For loads of up to 500 kg, a scissors principle is used. Higher loads of up to 2,000 kg are moved by way of a column design. Both versions are available in three variants – with control by hand panel, with electronic height adjustment or with programmable control for repeatable, workflow-driven series production. Low-noise electric motors operated with 230 V ensure the drive.