Papers by Author: P.Q. Guo

Abstract: The research on greenization of fixture technology is next to nothing nearly now. Approaches for greenization of fixture technology were discussed based on the analysis of energy forms and medium of fluid transmission. The feasibility that using manual fixture with multiple series supper-force-amplified device instead of power driven fixture was presented in the point of view for greenization of energy type. The working principle of manual fixture with four-step series force-amplified device, which we have invented independently, was introduced. According to the thought for greenization of medium of fluid transmission, the feasibility that employing pneumatic fixture with force-amplified device or pneumatic-hydraulic pressure-amplified device instead of hydraulic fixture. The innovated pneumatic fixture with sphere-coin two-step force-amplified device and the two-action pneumatic-hydraulic pressure-amplified device with two steps of pressure output were illustrated briefly by means of diagram.

Abstract: This paper presents a model to predict the cutting forces for flat end milling as machining gear indexing cam. Rotation feeding makes axial depth of cut and uncut chip thickness change during cutting process. The development of the model is based on the analysis of cutting edge expression. According to the existing the relationship of the local cutting force and chip load and assuming the cutter to be divided into a number of differential elements in the axial direction of the cutter, the model is derived by summarising the cutting forces produced by each differential cutter disc engaged in the cut. The equation for calculating uncut chip thickness of differential disc is educed. In order to avoid the complex computing for axial depth of cut of the entire edge, a unit square window function and its criterion are introduced to estimate whether a segment of edge is in engaging range.