Hafei aviation industry standard parts

Harbin aircraft aviation industry standard parts Co., Ltd. (hereinafter referred to as Hafei) is CNAC Group subsidiary company, mainly produce the aviation standard parts, the aviation standard thread MJ standard parts with the roll wire rolling forming machine, rolling machine is Qingdao Shengjian thread rolling machine, previous use of Shaanxi, a tool factory design and production of the thread rolling wheel, often appear rounded crest is not allowed, rolling wire round second end tooth breakup, life is not stable.
Through the analysis of the customer, we believe that the rounded crest not is because of grinding wheel dressing parameters of the grinding wheel is not guaranteed by; second end tooth breakup should is circular contour are not allowed, there is an acute angle, no arc ending, rolling wire wheel stress concentration generated micro cracks, in rolling force formed tooth collapsing; unstable life probably is caused by heat treatment and material.
In view of the above situation, Rothschild designed dome round bottom MJ aviation standard screw thread rolling wheel, using the arc finishing, tooth surface strengthening treatment, and fully remove the stress, in order to solve customer problems.
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