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Abstract：
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For steering knuckle CH1018 forgings, based on its shape and structure as well as forging process, the forming difficulties in die forging were analyzed, and combined with forging process scheme and main forging equipment tonnage calculation, the pre-forged die cavity and the flash groove were optimized and designed. Then, the flash groove was designed as the double storehouse structure, the flash bridge clearance was optimized from 4 mm to 3 mm, and the bridge width was increased from 10 mm to 12 mm. Finally, the optimized design method was applied to the practical mass production. After the design optimization, the blanking and pre-forming steps were simplified by means of mechanical press combined with blanking mold, and the forgings were obtained with good filling effect, compact structure, high material utilization rate and high production efficiency, and the qualified rate of products were increased from 95.6% to 99.2%. Thus, this design example provides a method for forming complex forgings with fork hole by combining blanking on mechanical press with hammer die forging.
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Funds：
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重庆市教委科学技术研究项目（KJQN201903404）
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AuthorIntro：
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徐皓（1979-），男，硕士，教授级高级工程师，E-mail：xuhaolj@mail.ustc.edu.cn
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Reference：
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