Production Machining

OCT 2016

Production Machining - Your access to the precision machining industrial buyer.

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For a related article on this topic, visit : A Bird's Eye View of Vertical Turning In the right applications, vertical turning can provide significant production benefits through higher capacity, rigidity, versatility and ease of automation. Here's a look at several examples of vertical turning at its finest. LINK :: was short and simple. e turning center typically is controlled by the Sinumerik 8280 from Siemens with an option for Siemens ShopTurn conversational program- ming and the FANUC Oi Control. e EMCO turning center consists of the workpiece load and unload system and the vertical spindle with 12-position tool turret below it. e machine can store parts on its feed side in a buffer loop. e parts, placed in carriers on the loop, are conveyed to a pick-up station where the three- jaw chuck grips and clamps the plate and moves it into the machine to the main spindle. e pick-up system removes the need for additional loading equip- ment, making it simple to handle a range of different parts if produc- tion needs change. Double Duty A pneumatic workpiece equipment monitoring device checks for precise workpiece clamping and alignment in the chuck. All machining movements on the X and Z axis are actuated through the main spindle. e design of the work area maximizes efficiency. For the flange part at Stamtex, the VT 400s are tooled with only two carbide insert tools—one for roughing and one for finishing the groove. e tools work from beneath the surface to be grooved, allowing chips and coolant to fall away into the high-capacity chip conveyor for disposal outside the machine. e machining cycle is only 15 seconds, with the first tool taking a plunge cut, followed by the finish cut in the 409 stainless material. e vertical turning center also includes an easy-to-use tool breakage monitoring system with automatic adjust- ment of the monitoring parameters to ensure process integrity within the machining cycle. After turning, the three-jaw chuck feeds the workpiece to the discharge position. In combination with the feeder and automated sequences during the machining process, this allows unmanned operation. A skilled setup person controls and monitors machining and also does tool changes. e VT 400s easily keep up with the press volumes with unmanned, highly consistent machining, and part handling has been dramatically reduced. Performing these grooving operations in-house means the company controls the quality of the part, and can ensure its customers of the processes' integrity. ese machines make sense for Stamtex. ey offer a 320-mm maximum turning diameter, 200-mm part length and 4,000-rpm spindle speed with 60 Nm of torque. e machine has the capacity to handle customer part sizes and designs as they evolve. It is able to process tough steel parts quickly and consistently in high volumes, providing plenty of easy access for tool change and part loading. e 12-position tool turret includes an 8.5-kW drive of each tool with 40 Nm of torque. According to an EMCO engineer, "e VT400 has the flexibility to perform multiple machine operations with short setup and retooling times. is reduces waiting times, resulting in a more productive machining environment. We optimize production processes to reduce chip-to-chip times, supporting complete, efficient part machining for simple or complex workpieces." Both vertical turning centers at Stamtex are the same to the last detail, and they are programmed the same, providing the shop the ability to move jobs where needed, when needed. Each machine has an operator, permitting the company to keep both machines' uptime maximized. "Our customers don't want to hear 'we can't,' so I back up everything," Mr. Frankle says. e machines process about 10 percent of the shop's total volume. e productivity and quality benefits are clear to Stamtex. Once the company had optimized the process, it was able to improve productivity on the flange part by about 400 percent. Uptime has been good, and its customers receive high quality parts on time. Mr. Frankle says if the company requires additional capacity, he will shop for a third EMCO VT. For more information from EMCO Group, call 248-313-2700 or visit For more information from Stamtex, call 330-652-2558 or visit The pick-up system removes the need for additional loading equipment, making it simple to handle a range of different parts if production needs change. Adding Value, Reducing Cost :: 41

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