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Study on Feeding and Recycling Method in High Speed Machining Fixture for Paper Honeycomb Part

Author: WuFuZhong
Tutor: KeYingLin
School: Zhejiang University
Course: Mechanical Manufacturing and Automation
Keywords: Paper honeycomb Retention system Granular particles Iron powder Vibration Feed Quantitative control Fill regional planning Control system Material separation
CLC: TG751
Type: PhD thesis
Year: 2004
Downloads: 181
Quote: 2
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Abstract

Compared with traditional immobilization methods, based on magnetic field and tribological principles cellular retention method retaining reliable, easy to use, no environmental pollution, and low cost. Using this holding method, can greatly improve the processing efficiency and the processing accuracy of the honeycomb core parts. As retaining a key technology in the methods, NC filler and recovery methods applied on the engineering of this new technology has a very important practical significance. This paper through the combination of theoretical analysis and experimental study of paper honeycomb parts retention system packing method in the system as well as iron powder separation methods. The text is divided into seven chapters: The first chapter on the overview of the development of the cellular composites in aircraft manufacturing. And then summing up the analysis of the existing paper-based honeycomb core parts retention methods, significance to the feeding methods and materials separation method based on packing methods and materials separation method, objectives and main content. Finally, the architecture of the main content of the thesis and thesis writing. Chapter II theoretically study the flow of granular material and material qualitative relationship between its own properties, and external vibration intensity. And experimental method by the outflow of iron powder (80 mesh) through the orifice, the fluidity and the aperture and the vibration acceleration, as well as the relationship of the elution volume and the flow time flow and vibration frequencies, the relationship of the amplitude, and given therebetween changes in the curve of FIG. Electromagnetic switch designed to a meet the requirements of the screw tube, and apply the experimental method of the relationship between the current intensity of the electromagnetic force and the air gap spacing, and the coil through theoretical calculation. These experimental data for the design of the vibrating hopper laid the foundation. Chapter III studies of the structure and the working principle of the vibrating hopper, drive systems, as well as pre-compact device. According to the test results and related iron powder fluidity and flow to the feed conditions required, to design a quantitative control function can be realized vibration to the hopper. Honeycomb core parts of a particular model of aircraft structural parts filler objects, make full use of modern design theory and methods, gantry drive mechanism devised a way to meet the requirements. In order to ensure that the cellular surface and magnetic platform in the packing process completely fit, put forward a Pneumatic pre-compressed program. Chapter First, the structural characteristics of the honeycomb core parts, starting from the the surfaces overall continuity and workability, raised a combined surfaces with complex transition region as a whole G ~ 1 continuous model. Then, based on mathematical models of cellular parts, combined with fillers condition proposed a filler area planning method based on positive quadrilateral zoning the filled area location optimization method for determining Chapter V is based on the structural characteristics of the packing system and motion accuracy requirements, research and development the filler device control system and control software. And a detailed discussion of the X, Y direction movement mechanism of dynamic response characteristics and stability of classical control theory and simulation software MATLAB. Chapter according to the differences of the physical properties of iron powder and chips, iron powder with chips based on the principle of gas-solid flow mixture separation technology. In the analysis of iron and chip separation pipeline corner separation conditions on the basis of detailed design materials separation system selection and calculation of the various parameters required. Zhejiang University PhD thesis concludes the paper work and innovation on the basis of Chapter VII, pointed out that parts of the paper-based cellular retention system packing with iron powder recycling method requires further study and solve problems. Keywords: paper honeycomb, the retention system scattered particles, iron powder, vibration feeder, quantitative control, the filler regional planning, control system, the separation of materials in this thesis funded by the defense and military projects.

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