doosan rotary table free sample

But consider a vertical machining center equipped with a tilting rotary table. Such a machine can handle five-side machining of prismatic parts, a far more common application than 5-axis contouring. The addition of the A and B axes allows shops to finish a variety of workpieces in a single setup, reducing cycle times and avoiding possible scrap or rework due to stack-up errors. And the machines themselves can be easier to program and less capital-intensive than equipment capable of simultaneous 5-axis machining using spindle movement.

According to Endsley, 60 percent of parts machined worldwide also have a blind side—one that is not machined. “With a universal machine, that’s your locating point,” he said. “You can set that down on a table, roll the table around and attack five sides of that part. Again, that’s true universal machining—one setup and one complete part. ”

Okuma’s MU VMC series is a good example of the types of machines that can be fitted with a tilting rotary table. They are sold with 400mm and 500mm tables to avoid potential accuracy issues associated with heavy workpieces. “As you get larger, the part weight can affect accuracy when you articulate the table,” Endsley explained. Okuma specs its tilt/rotary table accuracies at the maximum weight and, for table sizes of 800mm and 1,000mm, builds its Millac VH machines with articulating heads, he added. This eliminates any potential accuracy problems due to part weight.

Doosan Infracore America Corp., Pine Brook, N.J., offers both standard C-frame machines equipped with tilting rotary tables and larger VMCs with fully integrated tilting rotary tables and 5-axis contouring capability. While there is a difference in capability between the point-and-shoot C-frame machines and the larger, full contouring VMCs, customers often choose based on the size of components they are machining, according to Ron Kilgore, machining centers product manager.

“Medical manufacturers, for example, generally produce relatively small but complex components,” Kilgore said. “They tend to go as small as they can and still make their parts, and they will choose a small C-frame machine with a tilt/rotary table because they want to save floor space. Aerospace customers, on the other hand, want a machine that has everything built in and that can handle large parts.”

An example of the latter type of machine is Doosan’s VC630/5AX, which combines a 630mm tilting rotary table with 5-axis contouring capability. Kilgore said Doosan is looking at extending the line in both directions with 800mm and 500mm rotary tables, but its C-frame machines with tilting rotary table and 4+1 CNC capability are probably a better bet for many shops. The phrase 4+1 refers to a 3-axis machine with a rotary table, with “4” being the X, Y and Z axes and the rotary table, and “1” being the tilt of the rotary table.

Norman Holtzhauer, engineering manager for Chiron America Inc., Charlotte, N.C., suggested that users new to point-and-shoot programming index the table to the required angle, then set a new work coordinate system that allows use of simple X-, Y- and Z-axis movements. “Controls allow you to have a number of different work offsets,” he explained. “You can set zero in whatever position you want. You’re not trying to track a zero point through 3-D space, so you can redefine it wherever you want to simplify programming.”

Workpieces that lend themselves to point-and-shoot machining include any components that require, for example, multiple intersecting holes, drilling at odd angles or any operation on five sides. Hydraulic manifolds and similar components are often cited, and Doosan’s Kilgore recalled one shop that was making small, explosion-proof aluminum electrical enclosures using the 4+1 approach. “They used a 2-jaw chuck so the workpiece automatically centered when it was clamped,” he said. “They did five sides of the part, then moved it over to a vise on the side to finish the back end. Cycle time was less than 10 minutes.”

Doosan offers two approaches to multiaxis machining on a VMC: C-frame machines with 4+1 machining capability designed for point-and-shoot applications (shown here) and a 630mm table machine with full contouring capability.

The camera’s aluminum head is machined by P+S’s manufacturing division on a high-speed VF-3SS vertical machining center from Haas Automation Inc., Oxnard, Calif. Equipped with a Haas TR160 trunnion table, the machine enables milling of the parallel surfaces between the lens and the sensor location face to a tolerance of ±0.01mm, according to Richard Wagner, manufacturing division manager for P+S Technik. The head also requires production of a fine-pitch (M2×0.25) thread and other tight-tolerance features, and must look as good as it works, Wagner added.

Does it use G28 which is on a horizontal machine in the center off the table i think, but on a vertical machine the G28 is a fixed position not in the center of the table so is this a problem.

When it comes to Doosan, the first thing people may think about are big, beefy workpieces for jet-engine casings, automotive transmissions, oil well drills and even race car components. But there’s another big segment of our business: medical device machining. Not only does our lineup cover the machining of larger medical equipment such as CT scanners and hospital beds, we work with many Fortune 1000 companies and first tier suppliers that make surgical tools and medical implants like hips, knees, ankles, fingers and spinal plates.

The new DVF 5000 full 5-axis vertical machining center is another model that fits the medical industry as well. With spindle speeds of 18,000 r/min and a fully integrated 500mm rotary table, you can jump into simultaneous 5-axis machining immediately.