Five-Axis VMCs Attend to Versatile Machining Task Needs

Mold shops today are looking for vertical machining centers (VMCs) that can produce more faster with higher precision. YCM Technology (USA) Inc. highlights the CF/CX Series C-frame machines and RF/RX Series Ram-type machines as potential solutions. Both are available in 4+1 or five-axis high-spec configurations, which enables precision and reliability needed by moldmakers; the former machines parts up to 400 mm in diameter and the latter 650 mm in diameter.

The CF/CX and RF/RX Series share many of the same innovations and performance features, including rigid designs and thermal stability from Meehanite bases cast in YCM’s own foundry, followed by hand scraping of all mating surfaces — this attention to detail and craftsmanship results in optimum stiffness and vibration dampening, the company says. The spindles are designed and built in-house by YCM and feature ceramic bearings and a cooling system to reduce the effects of spindle thermal growth. Linear guideways, pretensioned ball screws and direct drive motors provide high torque and accurate positioning control of all axial movements.

A critical difference between the two series of machines is their fundamental design. The CF/CX Series features a C-frame design that provides simplicity and is more compact where space is limited. The open structure of the C-frame also allows for easy access to the work area for loading and unloading parts. The RF/RX Series is a Ram-type design with a vertical column (the “ram”) that can move horizontally along the cross rail, which is mounted on the base. This design provides expanded flexibility in positioning the cutting tool or workpiece. 

Both machines provide high performance and reliability, combined with a 3-year warranty. YCM notes that choosing between a C-frame and a Ram-type machine design depends on the intended application, part sizes, weight, available space and budget. C-frames are often favored for compact setups and simpler operations, while Ram-type designs offer expanded flexibility and rigidity, making them suitable for more demanding machining tasks.