Specialty grinder for large non-coplanar connecting rods


C & B Machinery of Brighton, Michigan, has received an order from a major North American manufacturer of large construction and mining equipment to supply a specialty grinder for grinding the parallel faces of very large connecting rods. To meet the customer’s quality and volume requirement’s, C & B will be building a virtually new grinder using a Mattison 100C-5 base machine pulled from C & B’s warehouse of more than 40 similar grinding machines.

A remanufacturing process will bring this grinder to 2019 technology standards and designs. Applying servo-controlled ball screw feeds on all five vertical grinding spindles, position tracking on the rotary table to aid the new robotic load automation. A touch screen mobile pendant will give the operator a simple operation of the grinder with its new 5-axis Allen Bradly safety integrated controls system. Post process gauging will feedback to the AB control system to maintain consistent stock removal and final size at each grinding spindle.

The tooling design will accommodate two different customer connecting rods without any changeover. Both connecting rods are over 21” (548mm) long and are non-coplanar — meaning the crank thickness is different from the pin thickness as well the pin is non-symmetrical. The grinder will also have the ability to exceed the customer’s volume requirements if needed.

C & B Machinery is a builder of high precision grinding machines based in Brighton, Michigan. Grinding machines, including all tooling, fixtures, controls, and lubrication system is designed, manufactured and installed at the Brighton, Michigan, facility and fully supported after the sale by C & B Machinery’s qualified and trained service and support staff. C & B supplies machines for a global list of customers, with the majority of sales being in North America (NAFTA Region). It provides complete turnkey grinding cells for all U.S. automotive companies and their tier-one and two suppliers. Included in the customer base are also aerospace, bearing, heavy equipment, compressor, and oil & gas industries.

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