You Ji’s DSM heavy duty duplex or double-sided milling machine series was designed specifically for production squaring and chamfering of square and rectangular blocks. The machines are engineered to perform heavy duty machining with high accuracy and high throughput.
Longitudinal X-axis travels for the five-machine series range from 23.6″ (600 mm) to 72.8″ (1849 mm) and Y and Z axes’ cross-travel extends from 14.7″ (373 mm) to 35.4″ (900 mm). Rotary table sizes start at 20.5″ (520 mm) square and the largest versions are 39.4″ (1000 mm) square.
The machines combine a rigid rotary table with dual milling heads. Each milling head moves independently in the Z-axis on rigid box ways. The rotary table moves in the X-axis on roller type linear ways, indexes every 45°, and clamps via a Hirth coupling to maximize rigidity.
The milling heads feature high-horsepower, large-diameter spindles that produce high torque at low rpm to run large diameter cutters. Each spindle is powered by a 20 hp or 30 hp motor (depending on model) with a variable speed range. Spindle tapers are 50 or 60 taper equivalent.
The machines operate semi-automatically. After the workpiece is shuttled into the machine manually, the part is automatically centered and clamped to the rotary table via hydraulic cylinders that apply pressure to the workpiece in 3 steps, from light pressure while centering the part to high-pressure maximum clamping force. Quick change, modular upper and lower fixtures hold the workpiece in place. The machine comes with 10 sets of clamping fixtures in a variety of sizes and shapes tailored to the user’s work.
A workpiece probe verifies the raw material size and can also provide rapid first part inspection.
The Mitsubishi C-70 controller, with touch screen interface and a You Ji custom HMI (Human – Machine Interface), makes machine set-up and operation quick and easy and enables setup of the next job while machining is in process.