At the MACH exhibition in Birmingham, UK earlier this month, Roemheld introduced a range of wedge clamping elements with patented safety bolts designed to attach a die set to the table and ram of a power press securely, regardless of whether the tool edges are straight or angled.

A positive locking action allows even a heavy upper die to remain in place during maintenance or if the clamping pressure drops. The clamps move automatically, making them easy to operate, while a position control feature verifies closure and release, and reports if no die has been placed or if the edge is incorrectly set.
The system consists of a hydraulic cylinder block and a bolt guided within a housing; the bolt having a contact surface angled at 20°. A projection on the bolt and a corresponding recess along the die edge ensure positive locking if the hydraulic pressure holding the upper die should fail.
Adapter plates for simple attachment to existing dies make the retrofitting process trouble-free. The wedge clamping elements, with single or dual action, exert a force from 25 to 1250 kN. They are available to suit straight and angled die edges, and are designed in a variety of styles, allowing customers to configure clamping arrangements using a range of options. Modular construction permits cost-effective production of the elements, high availability and short delivery times, says Roemheld.
Permanent lubrication gives the clamps virtually maintenance-free operation. Due to their robust design, they are able to withstand high temperatures and soiling, and offer long service life. On request, multi-layer coatings can be applied to the bolts and housings, reducing wear in challenging applications.
For further information www.roemheld.com

Germany-based Gedia Automotive Group has been developing and manufacturing cold-formed body and chassis parts for the car industry for over 50 years. In order to meet growing demand for structural parts with low weight and high crashworthiness, the company decided to invest in the latest press-hardening technology from AP&T.

“Gedia wanted to find a partner that could offer market-leading production solutions as well as help develop the company’s press-hardening expertise,” says AP&T’s general manager in Germany, Michael Hunger. “Since the very start, we have worked together to achieve the high level of flexibility, availability and quality that Gedia and its customers want to attain.”
To date, AP&T has installed three complete press hardening lines at Gedia’s facilities in Germany and Poland. Among other things, the equipment includes the latest generation of AP&T’s Multi-Layer Furnace (MLF) and press-hardening tools. The lines are equipped with a sensor-based system that gives full control over the heating and cooling process, which is decisive in terms of ensuring each part obtains the exact properties and quality that are desired. Advanced process monitoring enables the high demands on quality imposed by car manufacturers and, for example, the CQI-9 standard to be met.
A high degree of flexibility and scalability are important to Gedia. AP&T’s MLF is said to enable optimised capacity utilisation. More layers can be used if production increases; if it decreases, heating can be limited to fewer levels, which also saves energy.
For further information www.aptgroup.com