本文選題：超聲 + T2紫銅薄板��； 參考：《深圳大學(xué)》2015年碩士論文

【摘要】：宏觀大尺寸金屬板料制件成形過(guò)程中,利用超聲來(lái)降低坯料與模具間的摩擦,提高板料成形極限,已獲得廣泛應(yīng)用。而在微成形中,將超聲應(yīng)用于金屬薄板的成形,目前還少有報(bào)道。本文結(jié)合課題組發(fā)明的超聲柔性沖頭金屬板料微成形技術(shù)的需要,開(kāi)展金屬薄板超聲力學(xué)性能研究,為金屬薄板的微成形提供材料的基礎(chǔ)力學(xué)性能參數(shù),以彌補(bǔ)目前金屬薄板超聲力學(xué)性能數(shù)據(jù)的短缺,為超聲金屬薄板微成形奠定必要的基礎(chǔ)。本文在常規(guī)拉伸實(shí)驗(yàn)設(shè)備的基礎(chǔ)上,通過(guò)設(shè)計(jì)適合的超聲裝置,將超聲附加到T2紫銅薄板上,以實(shí)現(xiàn)超聲環(huán)境下金屬薄板的力學(xué)性能測(cè)試。由于金屬薄板超聲微拉伸力學(xué)性能測(cè)試在現(xiàn)階段尚難找到可資借鑒的資料,因此金屬薄板超聲拉伸實(shí)驗(yàn)面臨許多困難。本文旨在解決金屬薄板超聲拉伸過(guò)程中所出現(xiàn)的一些問(wèn)題,以通過(guò)拉伸實(shí)驗(yàn)來(lái)獲得金屬薄板在超聲振動(dòng)下獨(dú)有的力學(xué)性能。本文主要工作如下:1、選用厚度0.1 mm和0.05 mm的T2紫銅薄板材料作為實(shí)驗(yàn)材料,通過(guò)不同參數(shù)的退火處理,獲得不同晶粒尺寸以及不同厚度/晶粒尺寸比的金屬薄板受試材料。2、根據(jù)實(shí)驗(yàn)需要和超聲拉伸的特性,設(shè)計(jì)特殊形狀的拉伸試樣并確定出拉伸試樣合適的尺寸。在超聲拉伸實(shí)驗(yàn)過(guò)程中,根據(jù)出現(xiàn)的問(wèn)題不斷進(jìn)行修改,使其能獲得超聲拉伸的力學(xué)性能參數(shù)。3、首先利用市面上容易獲得的D1型超聲潔牙機(jī)作為超聲發(fā)生裝置,向受試材料試樣施加橫向超聲,初步了解金屬薄板在超聲振動(dòng)下進(jìn)行拉伸可能遇到的問(wèn)題,同時(shí)觀察超聲振動(dòng)對(duì)試樣材料力學(xué)性能的影響,為研制專用的超聲拉伸裝置奠定一定基礎(chǔ)。4、研制專用的縱向超聲微拉伸實(shí)驗(yàn)裝置及配套的夾具,進(jìn)行縱向超聲微拉伸實(shí)驗(yàn),觀察縱向超聲對(duì)試樣材料力學(xué)性能的影響,并比較橫向超聲和縱向超聲對(duì)金屬薄板力學(xué)性能影響的異同。
[Abstract]:It has been widely used to reduce the friction between blank and die and to improve the forming limit of sheet metal in macroscopical large size sheet metal forming process. However, there are few reports on ultrasonic application in metal sheet forming. In this paper, the ultrasonic mechanical properties of sheet metal are studied according to the need of ultrasonic flexible punching metal sheet microforming technology, which provides the basic mechanical properties of the material for the sheet metal microforming. In order to make up for the shortage of ultrasonic mechanical properties of metal sheet at present, it lays a necessary foundation for ultrasonic sheet metal microforming. In this paper, on the basis of the conventional tensile test equipment, a suitable ultrasonic device is designed to attach the ultrasonic to the T2 copper sheet, so as to realize the mechanical properties of the metal sheet under the ultrasonic environment. Due to the fact that it is difficult to find the reference data for the testing of ultrasonic microtensile mechanical properties of metal sheet at this stage, the ultrasonic tensile test of metal sheet is faced with many difficulties. The purpose of this paper is to solve some problems in the process of ultrasonic stretching of metal thin plates, and to obtain the unique mechanical properties of metal thin plates under ultrasonic vibration through tensile experiments. The main work of this paper is as follows: 1. The T2 copper sheet material with thickness of 0.1 mm and 0.05 mm is selected as the experimental material and annealed with different parameters. Different grain sizes and different thickness / grain size ratios were obtained. According to the experimental requirements and ultrasonic tensile characteristics, a special shape tensile specimen was designed and the appropriate size of the tensile specimen was determined. In the process of ultrasonic stretching experiment, according to the existing problems, the mechanical properties of ultrasonic stretching can be obtained by constantly modifying it. Firstly, the D1 ultrasonic tooth cleaning machine, which is easily available in the market, is used as the ultrasonic generating device. By applying transverse ultrasound to the specimen of the tested material, the problems that may be encountered in the tensile of the metal sheet under ultrasonic vibration are preliminarily understood, and the influence of ultrasonic vibration on the mechanical properties of the specimen is observed. In order to establish a certain foundation for the development of a special ultrasonic stretching device, a special longitudinal ultrasonic micro-stretching experimental device and its supporting fixture were developed, and the effects of longitudinal ultrasound on the mechanical properties of the sample were observed. The effects of transverse ultrasound and longitudinal ultrasound on the mechanical properties of metal sheet were compared.
【學(xué)位授予單位】：深圳大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TG115.5

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本文編號(hào)：2069328