For the transmissions of electric vehicles to develop the desired high torque under all driving conditions, a very large gear ratio is needed, which requires high speeds. And to ensure sufficient momentum at all speeds and enable the driver to accelerate without shifting gears, the electric drive must achieve up to 15,000 rpm, which is about three times that of a typical combustion engine. This puts a lot of strain on the rotor shaft. The manufacturers of rotor shafts are thus facing new challenges, such as the significantly lower shape and position tolerances and the need for greater machining precision.
Range anxiety, infrastructure debates, raw material shortages and unanswered questions shake up automotive’s move toward electrification—the journey won’t be easy, but the industry will push technology until it finds a way.
Range anxiety, infrastructure debates, raw material shortages and unanswered questions shake up automotive’s move toward electrification—the journey won’t be easy, but the industry will push technology until it finds a way.
If trade shows are still a major indicator of market growth, the construction and off-highway industries seem to be in a good place in 2023. CONEXPO-CONAGG and IFPE 2023 welcomed more than 139,000 attendees to Las Vegas in March. These visitors were treated to 2,400 exhibitors from 36 countries reaffirming the belief that innovation and sustainability will drive these markets in the coming years.
On the surface, it may not seem like the gear inspection industry has changed much over the last few years. Shops still primarily use either machines that are dedicated solely to measuring gears, or multiuse Coordinate Measuring Machines (CMMs). And regardless of which machine they use, software serves as the backbone that supports their many diverse sensors.
During our interactions with customers, we find the common challenge faced by customers about getting incorrect component parameters using corrected lead hobs. To address the challenge, we will talk about what corrected lead hobs are, why it is necessary to design such hobs, and how to set up the hob on the machine depending upon the type of hobbing machine (manual, semiautomatic CNC, or CNC).
Gleason LeCount Adjustable Expanding Mandrels offer a fast, flexible and amazingly simple solution for metrology applications where speed, accuracy and repeatability are paramount
Keep it simple. More often than not it turns out to be the best course of action in life and on factory floors. Take, for example, Gleason LeCount Expanding Mandrels. You’ll find them in quality labs around the world, delivering reliable, repeatable workholding performance for the inspection of gears and other bore-type workpieces. Quality labs today are at the epicenter of the drive to produce increasingly complex, high-precision parts, while at the same time racing to take time and cost out of the inspection process. Counter-intuitively, perhaps, the best workholding solution to meet these ambitious new inspection requirements turns out not to be something new and more complex—but the simplest solution of all: Gleason LeCount Expanding Mandrels.
When grinding steel parts, the surface of the part can "burn" if too much heat is applied in a short time. Grinding burn refers to all those structural changes in edge zones of steel parts that are caused by grinding processes in steels due to the thermal energy introduced. Grinding burn can mainly occur in the form of tempering zones or new hardening zones.
Examines the changing face of machine operation today
May 22, 2023
The electrification movement is in full swing despite many obstacles still in play. Regardless of these challenges, machine tool providers are expanding their machine operations and tooling capabilities to meet the e-mobility demands of the future.
In conventional gear manufacturing, quality control is carried out for a number of pieces per batch. Most parts enter final gearbox assembly without any inspection. Among other things, this approach is based on two facts: measuring time is significantly longer than the machining time, and the limited measuring capacity available.
Continuous generating cylindrical gear grinding is one of the most demanding grinding applications for automotive and aerospace manufacturers. To improve gear efficiency, gear life, and noise levels, gear profile tolerances and surface finish requirements are becoming more stringent. This is especially true for EV gears, which typically require lower noise characteristics than traditional automotive gears. These new quality requirements must be maintained without sacrificing cycle time, and without inducing grinding burn.