Application of Jacobian-Torsor in Assembly Tolerance Analysis of Die-Cutting Machine
In order to reduce or avoid the emergence of unqualified products in the process of die-cutting paper production,the pre-cision of cutting tool on the die-cutting machine need to be strict provisioned,the offset of the tool tip is limited to a certain extent to guarantee the cutting quality.For the above geometric functional requirements,the connection,contact and cooperation be-tween the parts in the die-cutting machine were studied,the tolerance torsor for characteristic element were expressed according to the characteristic of the plane and the cylinder,the assembly tolerance analysis model of die-cutting machine was established by putting the torsor into jacobian matrix for uniform assembly tolerance analysis.The sensitive ring which affects the tool tip devia-tion is obtained by calculating and analyzing according to the extreme value method,which provides the basis for tolerance opti-mization.
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