本文選題：表面質(zhì)量 + 單點(diǎn)增量成形��； 參考：《西安理工大學(xué)》2017年碩士論文

【摘要】：金屬板料單點(diǎn)增量成形(Single point Increment Forming, SPIF)技術(shù)是一種新型塑性成形技術(shù),與傳統(tǒng)的成形工藝相比,成形過程中不需要專用模具,節(jié)省了傳統(tǒng)模具制造和維護(hù)費(fèi)用,加工周期短,適合于加工小批量、多品種和復(fù)雜的鈑金類工件,并且成形所需設(shè)備能耗低,板料局部成形力小等特點(diǎn),屬于現(xiàn)代綠色加工范疇,在航空航天、汽車工業(yè)、醫(yī)療領(lǐng)域等行業(yè)擁有廣泛的應(yīng)用前景。成形零件表面質(zhì)量差是制約該技術(shù)推廣的主要方面,研究成形零件表面質(zhì)量的影響因素及規(guī)律對于提高成形零件表面質(zhì)量具有重要的意義。依據(jù)單點(diǎn)增量成形原理,建立了直壁面和自由曲面成形零件表面殘留波峰高度幾何模型,分析了直壁面和自由曲面的成形參數(shù)對表面殘留波峰的影響規(guī)律;根據(jù)單點(diǎn)增量成形過程中摩擦特點(diǎn),建立了成形零件表面殘留波峰高度的材料特性模型,分析了材料特性對表面波紋度的理論影響規(guī)律。基于HASS-VF立式數(shù)控加工中心建立了單點(diǎn)增量成形實(shí)驗(yàn)平臺;研究了層進(jìn)給量、工具頭半徑、直壁面成形角、自由曲面曲率半徑和曲面法向角等成形參數(shù)對直壁面、“凹+凸”自由曲面、“凹”自由曲面以及“凸”自由曲面四種零件類型表面波紋度、表面粗糙度的影響;將實(shí)驗(yàn)得到的表面波紋度輪廓最大高度與理論模型分析結(jié)果進(jìn)行對比,分析了二者之間存在差異的原因;通過實(shí)驗(yàn)研究了材料特性對表面波紋度的影響,驗(yàn)證了表面殘留波峰高度材料特性模型的有效性;分析了層進(jìn)給量、工具頭半徑、進(jìn)給速度和主軸轉(zhuǎn)速等成形參數(shù)對橫向表面粗糙度的影響。利用灰色關(guān)聯(lián)分析與響應(yīng)曲面分析對單點(diǎn)增量成形件的表面粗糙度進(jìn)行優(yōu)化,以典型直壁面方錐臺件為例,得到了工具頭直徑、層進(jìn)給量、進(jìn)給速度和主軸轉(zhuǎn)速對成形零件縱向和橫向表面粗糙影響的顯著性程度,以及對縱向和橫向表面粗糙度整體影響顯著性程度,分別獲得了成形件縱向和橫向表面粗糙度預(yù)測模型,并以縱向和橫向表面粗糙度預(yù)測模型為基礎(chǔ),得到了使得成形零件縱向與橫向表面粗糙度整體最佳的成形參數(shù)。
[Abstract]:Single point incremental forming (SPIFs) is a new plastic forming technology. Compared with the traditional forming process, the special die is not needed in the forming process, and the cost of manufacturing and maintenance of the traditional die is saved, and the processing period is short. It is suitable for the processing of small batch, multi-variety and complex sheet metal workpieces, and has the characteristics of low energy consumption of equipment and small forming force of sheet metal. It belongs to the category of modern green machining, in aerospace, automobile industry, etc. Medical field and other industries have a wide range of application prospects. The poor surface quality of the formed parts is the main aspect that restricts the popularization of the technology. It is of great significance to study the influencing factors and rules of the surface quality of the formed parts for improving the surface quality of the formed parts. According to the principle of single point incremental forming, the geometric models of the height of residual wave peaks on the surface of straight wall and free-form surface are established, and the influence of forming parameters of straight wall and free surface on the surface residual wave peak is analyzed. According to the friction characteristics in the process of single point incremental forming, the material characteristic model of the surface residual wave peak height of the formed parts is established, and the influence of the material characteristics on the surface waviness is analyzed. Based on HASS-VF vertical NC machining center, a single point incremental forming experiment platform is established, and the straight wall surface is studied, such as layer feed, tool head radius, straight wall forming angle, curvature radius of free surface and normal angle of curved surface. The influence of surface waviness and surface roughness of four types of parts: concave free surface, concave free surface and convex free surface. The maximum height of the surface ripple profile obtained from the experiment is compared with the theoretical model analysis results, and the reasons for the difference between the two are analyzed, and the influence of the material characteristics on the surface waviness is studied through experiments. The validity of the material characteristic model of the height of the residual wave peak on the surface is verified, and the effects of the layer feed rate, the radius of the tool head, the feed speed and the spindle speed on the transverse surface roughness are analyzed. Using grey correlation analysis and response surface analysis to optimize the surface roughness of a single point incremental forming part, taking a typical straight wall square cone as an example, the diameter of the tool head and the feed rate of the layer are obtained. The influence of feed speed and spindle speed on the longitudinal and transverse surface roughness of the formed parts and the overall influence of the longitudinal and transverse surface roughness are significant. The prediction models of longitudinal and transverse surface roughness are obtained respectively. Based on the prediction model of longitudinal and transverse surface roughness, the forming parameters that make the overall longitudinal and transverse surface roughness of formed parts are optimized.
【學(xué)位授予單位】：西安理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TG306

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 李燕樂;陳曉曉;李方義;孫杰;李劍峰;趙國群;;金屬板材數(shù)控漸進(jìn)成形工藝的研究進(jìn)展[J];精密成形工程;2017年01期

2 覃孟揚(yáng);劉大維;羅永順;李玉忠;;基于灰色系統(tǒng)理論的車削參數(shù)多目標(biāo)優(yōu)化(英文)[J];機(jī)床與液壓;2013年24期

3 沈長艷;高霖;;TA1板料數(shù)控漸進(jìn)成形時(shí)摩擦與潤滑的研究[J];中國機(jī)械工程;2013年21期

4 蔡長生;;熱沖壓成形技術(shù)與應(yīng)用[J];鍛壓技術(shù);2013年03期

5 劉春景;唐敦兵;何華;陳興強(qiáng);;基于灰色關(guān)聯(lián)和主成分分析的車削加工多目標(biāo)優(yōu)化[J];農(nóng)業(yè)機(jī)械學(xué)報(bào);2013年04期

6 宋修成;陸彬;陳軍;王宇樂;;板料漸進(jìn)成形件表面質(zhì)量的影響因素分析[J];機(jī)械工程學(xué)報(bào);2013年08期

7 盧秉恒;;西安交通大學(xué)先進(jìn)制造技術(shù)研究進(jìn)展[J];中國工程科學(xué);2013年01期

8 蔡改貧;邢聰文;羅小燕;姜志宏;;板料多點(diǎn)漸進(jìn)成形力多通道數(shù)據(jù)采集裝置設(shè)計(jì)[J];中國機(jī)械工程;2012年24期

9 許楨英;張凱;王勻;吳俊峰;錢政;;基于漸進(jìn)成形技術(shù)的滾塑模具成形工藝研究[J];材料工程;2012年11期

10 查光成;李振紅;吳夢陵;孔凡新;;金屬鉭板的漸進(jìn)成形實(shí)驗(yàn)研究[J];熱加工工藝;2011年17期

，

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