Forging progress also reflected in the mold manufacturing progress. Generally speaking, the last set of molds average manufacturing time is about 4-5 times the current advanced level under the current progress, the main use of computers and high-speed processing equipment, advanced technology, mold manufacturing cycles shorten internal gear type, by forging die manufacturing concepts this comes also changing, improve die life and shorten the molding time is equally important, and maximize the use of inserts die forging. 1. The raw materials are microscopic crack crack: strict internal quality control of raw materials. 2. Heat Treatment improper operation (heating rate is too fast, improper coolant selected, the cooling time is too long): Note preheating, select the appropriate coolant. 3. The special shape of the mold, the inner ring price of uneven thickness, with sharp corners and threaded holes, etc.: clogged ring threaded hole processing, filling corners, wrap dangerous section and thin-walled, take quenching. 4. without intermediate annealing, quenching surface again: When the repair or renovation of the mold, to carry out an annealing or tempering. 5. After quenching and tempering is not timely: Timely tempering. 6. tempering inadequate: to ensure tempering time, the number of tempered steel should be required. 7. Improper grinding operations: Select the correct grinding process. 8. EDM, hardening layer high tensile stress and there microcracks: Improved EDM; de-stress temper; removing the hardened layer electrolysis or corrosion or other methods. Ring gear ring gear manufacturers _ _ Super League Super League forging Forging Co., Ltd. Luoyang provided. Luoyang Super League Forging Co., Ltd. (www.lysmzg.com) (www.lysmzg.com) strong, credible, in Luoyang forging industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the Super League forging into the brilliant and you work for a better future! You can also access (www.lysmzg.com/supply_details_45986140.html), for more information about the company.