Transfer Weight-Correction Machine for Connecting-Rods
112 TBMP | 212 TBMP

Range of application
Measurement of the weight of rotating and oscillating parts or the absolute weight of machined connecting-rods for internal combustion engines. Controlled weight correction at the prepared correction pads on the small-end and big-end. Weight correction is usually followed by fineboring.

Application of the machine in large-volume production, interfaced with the production line.

Design
Transfer machine with automatic operating sequence. Modular machine construction, thus optimally adaptable to the task. Arrangement of the stations in an in-line direction with all stations covered by an electro-mechanical lift and carry transfer for transport of the connecting rods. Welded machine base with lateral bases supporting the milling units, prepared for removal of the chips by a chip-conveyor or underfloor extractor. Electromechanical, numerically controlled milling unit and digital operating tandem weighers. Microprocessor-controlled measuring equipment for acquisition of the measured values and processing; machine PLC control with fault diagnosis.

Electro-mechanical carriage units with digital positioning control. Milling of the correction pads with amply dimensioned milling cutters with hard-metal carbide inserts (divided arrangement for overlapping cut.) The horizontal layout of the units allows easy chip removal directly through the machine bed into a collection bin, on a chip-conveyor or underfloor extractor.

Sampling of the connecting-rod geometry for increasing the correction accuracy is an option. This method allows an offset to cater for weight deviations through final machining of the journal holes and/or acquisition of the actual pad geometry.

Measurement and control weighers with two electronic load-cells for the big-end and small-end. Digital determination of the absolute weight or deviations from the pre-defined target weight. Zero setting according to a master connecting-rod. Weighers are adaptable to other connecting-rod types by adjustment or exchange of adapters.

De-burring equipment with rotating tool, matched to the actual parameters of the work-piece. Largely constant control of the de-burring cross-section without affecting the weight-correction results.