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Lin H.,Taizhou Vocational Technical College | Lin H.,Zhejiang University
Yadian Yu Shengguang/Piezoelectrics and Acoustooptics | Year: 2015

In order to measure geometrical precision of the thin parts rapidly and accurately, a measurement method based on machine vision was represented. According to the requirement of field of view and precision, hardware and software of the measurement system including the CCD sensor, lens, and the light source were developed. The subpixel edges of the image were extracted after bicubic interpolation subdivision. And the contour of the part is segmented into the arcs and lines by least square fit method with weight function. Then the roundness error and the center distance size error were calculated automatically. The measurement results of gear pump intermediate part show that, this system can used in geometry precision (IT7) measurement of thin parts quickly and accurately. ©, 2015, Sichuan Institute of Piezoelectric and Acoustooptic Technology. All right reserved.


Lin H.,Taizhou Vocational Technical College | Yang G.,Shenyang University of Technology
Yadian Yu Shengguang/Piezoelectrics and Acoustooptics | Year: 2015

A new equipment of micro-EDM with high precision three-dimensional micro microstructure has been developed according to the characteristics of micro-EDM technology and its technical features in this paper. Its structure and the controller of digital PID plus bi-directional static compensations are applied to reduce the output dead-zone of USM in the experiment system, the self-tuning regulator of discharge gap depending on discharge conditions is realized. The experimental study on the platform performance has been carried out by suing the set-up. The results show that it can be quick response, smooth, ultra low speed, super resolution and machining efficiency etc and realize the submicron accuracy in a stroke of hundreds of millimeters, with the minimum speed of 0.1 μm/s and the minimum closed loop step of 100 nm, which can meet the needs of micro-EDM. ©, 2015, Sichuan Institute of Piezoelectric and Acoustooptic Technology. All right reserved.


Hu D.,Taizhou Vocational Technical College | Hu D.,Baida Mechatronics Institute
Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys | Year: 2015

The hot deformation behavior of 6082 aluminum alloy at 350~500 ℃ and 0.01~5.00 s_1 was analyzed by using hot compression testing on a Gleeble-1500 simulator, and the constitutive equation of 6082 aluminum alloy was presented by means of fitting experimental data. The precision forging process of the 6082 aluminum alloy heat sink was simulated using Deform-3D software and the forming laws. The feasibility of numerical simulation was verified by trial production, which provided some references for engineering application. ©, 2015, Journal Office of Special Casting and Nonferrous Alloys. All right reserved.


Lin H.,Taizhou Vocational Technical College | Yang G.,Shenyang University of Technology
Yadian Yu Shengguang/Piezoelectrics and Acoustooptics | Year: 2015

Ultrasonic micro-motor gathers a lot of advantages, such as high resolution, good dynamic performance, small volume, compact structure, low cost, high output force, quickly response, high precision and no electromagnetic interference etc. However, it has some shortcomings, such as vertical displacement, lag error, and small travel, especially those shortcomings have many seriously affection on the positioning accuracy and 3D processing because of increasing compensation after electrode loss. Based on ultra-precision 3D platform of piezoelectric motor driver in the paper, its large travel and small step is combined by adopting macroscopic-microcosmic and double-direction drive control system. After testing of micro-precision worktable, the running curves are obtained. Results show it has good dynamic and steady performance, realizing ultra-low speed, fast response, high resolution and high precision of two-way stepping movement. Simultaneously, it has achieved the sub-micrometer to nanometer positioning accuracy and satisfied the positioning accuracy of micro-EDM. The research provides significant scientific reference for further development of piezoelectric motor application in ultra precision motion system position precision of the system. © 2015, Sichuan Institute of Piezoelectric and Acoustooptic Technology. All right reserved.


Hu D.-C.,Taizhou Vocational Technical College | Hu D.-C.,Baida Mechatronics Institute | Wang L.,Taizhou University
Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment | Year: 2015

The hot deformation behaviors of 6082 aluminum alloy were studied at 350-500℃ and strain rate range of 0.01-5 s-1 by using hot compressing testing on a Gleeble-1500 simulator. According to the experimental results, the processing maps were calculated on the basis of the dynamic materials model (DMM). The regions of flow instabilities and optimum hot deformation conditions can be attained from the processing map and microstructure evolution analysis. The results show that the security domain of hot deformation for 6082 aluminum alloy is mainly between 430℃ and 490℃, and strain rate range of 0.1-0.2 s-1, with a higher power dissipation factor and maintain a smooth variation. The grain refinement by dynamic recrystallization(DRX) under the stable deformation conditions is observed, the optimal deformation processing parameters are the hot deformation temperature range from 440℃ to 480℃, and strain rates range from 0.1 s-1 to 0.2 s-1. ©, 2015, Editorial Office of Transactions of Materials and Heat Treatment. All right reserved.

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