Based on experimental and theoretical analysis, a new viewpoint of which a comound curling chip is easier to break than a up curling chip or if the degree of side curling is higher than that of up curling in the compound curling it is aslo easier to break than a side curling chip has been put forth in this paper,and the conditions of producing the compound culing chip have been investigated.

The mechanism and control research on side-wall curl of automobile HSS body panels

Porblems of applying side roller shutter to fire compartment;

Predicting the up-curl chip breaking of three-dimensional groove inserts;

It builts basis for the prediction of the radius of curvature of cross-curling chips and chips break natur.

Based on the theoretical formula to judge cross-curling spiral chips breaking,it is simplified according to the experiment results.

With the aid of high-speed photogmphy，the formation and breakingof"C"-type cross-curling chips are analy ed.

Based on experimental and theoretical analysis, a new viewpoint of which a comound curling chip is easier to break than a up curling chip or if the degree of side curling is higher than that of up curling in the compound curling it is aslo easier to break than a side curling chip has been put forth in this paper,and the conditions of producing the compound culing chip have been investigated.