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The Society of Manufacturing Engineers (SME) has been gathering, validating and sharing manufacturing knowledge for more than 80 years. Traditionally, SME resources were purchased by individuals for their own personal use or by colleges and universities as textbooks. Recently, these same colleges and universities were looking for digital resources to provide to their instructors and students. Companies were requesting SME content digitally for their employees as well.
Have you ever stood on a beach at the edge of the water and felt the grains of sand dissolve from under your feet as the water recedes? No matter how hard you plant your feet or grip your toes, you can’t hold on to the sand. It just flows away right from under you. In many ways that sand is like the knowledge and experience of our graying manufacturing workforce. It seems inevitable that much of that knowledge is being washed away.
There are great advantages in dry hobbing, not only for friendliness toward the environment, but also for increasing productivity and for decreasing manufacturing cost. Dry hobbing, however, often causes failures in hob cutting edges or problems with the surface quality of gear tooth flanks. These difficulties are not present when hobbing with cutting oil. Pinching and crushing of generated chips between the hob cutting edge and the work gear tooth flank is considered a major cause of those problems.
Some results of evaluation by this method in the automotive industry.