011-13 2013-02-05

Maximum safety

Bosch Rexroth solutions on the roll mills

The new Bosch Rexroth solutions on the roll mills of the Hutchinson Group provide enhanced safety for the operators.

Outstanding function of Bosch Rexroth safety solution for roll mills,in the rubber industry, has once again been verified

Hägglunds drive systems, today supplied from Bosch Rexroth, has for more than 15 years been supplied to roll mills in the rubber production sites of the Hutchinson group. Recently the Hutchinson subsidiary Le Joint Français in Saint-Brieuc, France, acknowledged Bosch Rexroth as an expert authority for its drive and control solutions by ordering a Hägglunds drive system when upgrading one of their roll mills. The excellent performance of the safe stop function, in the supplied system, was also verified once again and exceeded the expectations of Le Joint Français.

For their retrofit overhaul of a roll mill for rubber production, the Hutchinson Group subsidiary, Le Joint Français, turned to the expertise of Bosch Rexroth. The upgrade involved replacing an electro-mechanical drive with a Hägglunds hydraulic direct drive transmission.

The Hägglunds drive solution offered fully variable speed to the roll mill and in addition to that, the system included also the, by regulations needed, safe stop function for the maximum safety of the personnel. Roll mills have to be able to immediately stop in case for an emergency. The safety requirements from Le Joint Français exceeded those of the current European standard, EN1417, and required it to stop within a rotation angle of less than 30°.

The performance of the safe stop function was checked during commissioning of the equipment confirming an safe stop within a rotation angle of approximately 3°. This performance greatly exceeded the target stipulated by Le Joint Français and showing what standards in terms of safety that can be reached. According to the current standard a machine has to stop over an angle smaller than 1 radian, which is about 57° and in this case equivalent to approximately 350mm. The installed new Hägglunds drive system achieved stopping within 3° which is equivalent to only about 18mm.

Market leading and experienced companies, like Bosch Rexroth, are focusing on achieving gains in performance and productivity in a wide range. The solution and know how in engineering, supplied here, have demonstrated high values in a field which is essential for industrial operations – safety.

For upgrading of the rubber roll mill, Bosch Rexroth proposed a turnkey solution consisting of Hägglunds high-torque, low-speed hydraulic motors, safe stop valves, mounting accessories and a hydraulic drive unit but also assistance in assembly and commissioning. In order to limit production downtime, the overhaul work only took a week to complete.

Bosch Rexroth AG is one of the world’s leading specialists in the field of drive and control technologies. Under the brand name of Rexroth, the company supplies more than 500,000 customers with tailored solutions for driving, controlling, and moving. Bosch Rexroth is a partner for mobile and machinery applications, engineering, factory automation as well as renewable energies. The company covers the requirements and special needs of each of these markets. As The Drive & Control Company, Bosch Rexroth develops, produces and sells components and systems in more than 80 countries. In 2011, Bosch Rexroth, part of the Bosch Group, achieved sales of around 6.4 billion euros with 38,400 employees.

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The Bosch Group is a leading global supplier of technology and services. According to preliminary figures, more than 300,000 associates generated sales of 51.5 billion euros in the areas of automotive and industrial technology, consumer goods, and building technology in fiscal 2011. The Bosch Group comprises Robert Bosch GmbH and its more than 350 subsidiaries and regional companies in some 60 countries. If its sales and service partners are included, then Bosch is represented in roughly 150 countries. This worldwide development, manufacturing, and sales network is the foundation for further growth. Bosch spent more than 4 billion euros for research and development in 2011, and applied for over 4,100 patents worldwide. With all its products and services, Bosch enhances the quality of life by providing solutions which are both innovative and beneficial.

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