New EMAG modular vertical hobbing machine VL 4 H- designed with the whole process in mind
March 08, 2018
Gears literally keep the world moving. They are found absolutely everywhere in many different types and shapes and made from an extremely wide range of materials — from the tiniest, most delicate gears used by watchmakers to gears 16 meters in diameter used in mines and the cement industry, where they drive gigantic mills and rotary kilns. But no matter whether big or small, they all have one thing in common: They must satisfy the most demanding requirements.
EMAG, a company with many years of success in the field of gear cutting, has demonstrated its capabilities in a multitude of projects for a broad clientele. Satisfying the most demanding requirements is second nature for the company's gear cutting experts, who meet such requirements with the necessary expertise and first-rate technology.
Technology like that is used in the new modular VL 4 H hobbing machine, which is the experts' answer to the demands of high-volume manufacturing.
VL 4 H—a modular machine from EMAG
EMAG's modular machines belong to a successful machine series that combines the different technologies of the EMAG Group in a standardized machine base. Whether for turning, grinding, induction hardening, or gear cutting, the proven EMAG pick-up principle ensures highly automated, efficient production. The pick-up automation system integrated into each modular machine features a parts storage unit for blanks and finished parts, from which the machine is automatically loaded. This results in short chip-to-chip times of only a few seconds. The vertical construction of the machine not only guarantees an ideal chip flow but also prevents the formation of chip clusters, thus contributing to a consistently high quality of production.
The compact vertical design of the machines makes them attractive both as single units and as part of an interlinked manufacturing solution. The interlinking option is made easy to implement by the consistent transfer height between the automation systems of individual machines. In addition, the separate energy container allows the use of the new EMAG TrackMotion automation system specially developed for modular machines. The automation system directly behind the machining area transports the parts and also operates as a flip-over unit, which increases the flexibility of the entire system.
Gear hobbing and chamfering on a single machine
The vertical VL 4 H hobbing machine can be configured for a wide range of applications. The high-performance drives used in the working spindle and in the hob enable high speeds and torques, ensuring fast, precise, and cost-optimized gear production. The machine allows dry gear hobbing of workpieces with diameters of up to 200 mm and module 4. The optionally available measuring system for part alignment can be expanded by adding a sensor system for positioning. It is installed outside the machining area, where it is protected from chips and dirt; it can also be extended and retracted as required. This not only allows adjustments to be made to the machining operations at any time, it also permits seamless documentation for production quality assurance
The machining area of the VL 4 H is perfectly accessible through the large front door, allowing rapid set up times and creating an ergonomic work environment for the operator. The combination of powerful drives, a working spindle that can be controlled with absolute precision, tool clamping, and the generously dimensioned machining area allows various different gear cutting methods to be used on the machine. For instance, the chamfer cut method can be used to chamfer the workpieces directly after hobbing, with a single clamping operation. To do so, the chamfer cut tool is mounted on the hob arbor of the cutter in addition to the hob. The chamfer cut method, developed by FETTE, is ideal for precise and low-cost chamfering processes.
“As this method does not produce any secondary burr and does not warp the material, it is especially suitable for gear teeth that are honed after hardening,” said Peter Loetzner, president and CEO of EMAG LLC.
The workpiece does have to have a suitable shape, however.
“We have successfully tested this machining combination in the manufacture of gears,” he said. “The wheel-shaped workpieces have hardly any interfering contours, so that chamfering with chamfer-cut is possible. The machining combination of hobbing and chamfering in a single clamping operation on one machine is of course a cost-effective solution for the user, as two manufacturing processes can be performed at the same time with just one machine, and the workpiece handling between the processing steps is also eliminated. That lets you reduce your floor to floor times and get workpieces to the next production step faster.”
VL 4 H—high degree of freedom for the user
The new VL 4 H from EMAG offers users a multitude of possibilities. As shown in the example, it can be used as a standalone machine for gear cutting or for combined hobbing/chamfering, or as part of a production line, which is relatively easy to do thanks to the advantages of EMAG's modular machines. In all cases, the user benefits from the many possibilities that the machine offers.
“At EMAG, we place great value on giving our customers the best advice,” Loetzner said. “With the VL 4 H we have added another valuable module to our standard modular series, which allows us to offer our customers the best possible manufacturing solution for their application, from standalone machines to highly automated manufacturing systems for large-scale production.”
For more information: www.emag.com