Optimization of Machining Fixture: Validation of Clamping Force on Side Frame of Ginning Machine

摘要

Machining fixtures are used to locate and constrain a work piece during a machining operation. To ensure that the work piece is manufactured according to specified dimensions and tolerances, it must be appropriately located and clamped. Minimizing work piece and fixture tooling deflections due to clamping and cutting forces in machining is critical for machining accuracy. An ideal fixture design maximizes locating accuracy and work piece stability, while minimizing displacements. Deformation of the work piece may cause dimensional problems in machining. Supports and locators are used in order to reduce the error caused by elastic deformation of the work piece. The optimization of support, locator and clamp locations is a critical problem to minimize the geometric error in work piece machining. This paper proposed the optimization of machining fixture for the side frame of ginning machine. Also experimental validation of clamping force optimization, and find work piece displacement. Dimensional accuracy of workpart under machining is strongly influenced by the layout of the fixturing elements like locators and clamps. Setup or geometrical errors in locators result in overall machining error of the feature under consideration. Therefore it is necessary to ensure that the layout is optimized for the desired machining tolerance for a given deviation in the set up or geometry of the locator.