Research Of Technology Of Cold Forging Spur Gear

Gears are used widely in automobile, ship and other machines as themovement and power transfer parts. The traditional manufacturingtechnique of gears, the metal cutting method, has many disadvantages, suchhas low use rate of material, low productivity, high production cost, and soon. The net-shape forging is an advanced technology. It may not only liftmaterial utilization from 40% to 70%, but also lift the gear strength over20% and production efficiency over 40%. Conventional experimentalmethod cost greatly and can't show the fluxion regulation during thedeformation. Now as the finite element simulation technique increasinglyimproved, engineer can carry on the deeper analysis in low cost and highefficiency.This paper discussed the gear cold forging, which is one kind of thenet-shape forging. In Japan and German, this technology has been usedsuccessfully, but in China, this technology is mainly researched in lab now.The largest problem is the punch force increasing sharply at last and metalcan not fill up the die entirely. Then with the well developed numericalsimulation software--Deform, the author simulate some forming processes, -relief hole. Then, author analysis some stress and strain charts, force-strokerelationship charts. Finally, the author analyses the different two kinds offorge tools.The result that author made from this analyses can used in the realproduction. On the base of the pattern that author made, designers can carryon the deeper analysis. They can optimize to the main design parameter trymeans of the imitation in the actual manufacture.