US 12,403,552 B2
Roller tooth profile of work roll for roll forming of flow channel of metal bipolar plate and parametric design method thereof
Fuqiang Zhao, Taiyuan (CN); Xiaolong Xie, Taiyuan (CN); Qingxue Huang, Taiyuan (CN); Hugang Tian, Taiyuan (CN); Yanlei Zhang, Taiyuan (CN); and Hongwei Wang, Taiyuan (CN)
Assigned to Taiyuan University of Science and Technology, Taiyuan (CN)
Filed by Taiyuan University of Science and Technology, Taiyuan (CN)
Filed on Jun. 19, 2023, as Appl. No. 18/337,114.
Claims priority of application No. 202210697348.5 (CN), filed on Jun. 20, 2022.
Prior Publication US 2023/0330791 A1, Oct. 19, 2023
Int. Cl. B23P 15/28 (2006.01)
CPC B23P 15/28 (2013.01) 4 Claims
OG exemplary drawing
 
1. A roller tooth profile of a work roll for roll forming of a flow channel of a metal bipolar plate, wherein the work roll comprises an upper roller and a lower roller, and each of the upper roller and the lower roller comprises a plurality of teeth and a plurality of grooves; and the roller tooth profile is determined based on flow channel depth h and a rolling period, wherein h=r1−r6; the rolling period is determined by a period angle φ which is an angle between center lines of two adjacent teeth; r1 is a radius of a tooth top circle of the upper roller; and r6 is a radius of a tooth root circle of the upper roller;
a roller tooth profile diagram is plotted according to the flow channel depth h and the rolling period; a first-half surface of a tooth of the upper roller consists of a tooth top surface segment AB, a tooth top angle segment BC, a tooth-side upper half segment CD, a tooth-side lower half segment DE, a tooth root angle segment EF, and a tooth root segment FG; wherein the segment AB is taken from a first circle with a center O1 of the upper roller as center and the radius r1 as radius; the segment CD is taken from a second circle with a center O3 of an adjacent tooth as center and r3 as radius, wherein r3 is a distance from the center O3 to a tooth-side point of the tooth corresponding to the segment AB; the segment BC is an arc transition segment tangent to points B and C and with O2 as center; the segment DE is a straight segment tangent to point D; the segment FG is an arc segment with O1 as center and the radius r6 as radius; and the segment EF is an arc segment tangent to points E and F and with O5 as center; and
the first-half surface of the tooth is the same as second-half surface of the tooth in shape, and symmetrical with the second-half teeth of the tooth; and the upper roller is the same as the lower roller in roller tooth profile.