【摘要】：本文以微小零件切削加工為研究背景,設(shè)計(jì)研制了龍門式微銑削加工系統(tǒng)。該加工系統(tǒng)的整體尺寸為600mm×600mm×500mm,系統(tǒng)具有四個(gè)直線移動(dòng)軸和一個(gè)旋轉(zhuǎn)軸,加工范圍為200mm×50mm×50mm。根據(jù)微小零件銑削加工的要求,對(duì)系統(tǒng)整體和部件進(jìn)行了結(jié)構(gòu)設(shè)計(jì)。利用有限元分析軟件,對(duì)龍門結(jié)構(gòu)進(jìn)行動(dòng)靜態(tài)結(jié)構(gòu)分析,研究了龍門結(jié)構(gòu)的變形趨勢(shì)和最大變形發(fā)生的位置;其次對(duì)龍門結(jié)構(gòu)進(jìn)行模態(tài)分析,獲得系統(tǒng)的固有頻率和主要振型;根據(jù)龍門結(jié)構(gòu)的變形趨勢(shì)、模態(tài),對(duì)橫梁和立柱進(jìn)行了多目標(biāo)參數(shù)優(yōu)化,提高結(jié)構(gòu)的靜、動(dòng)態(tài)剛度,從而提高了系統(tǒng)的性能,采用錘擊試驗(yàn)法進(jìn)行機(jī)床的模態(tài)試驗(yàn),獲得了實(shí)際情況下的固有頻率和阻尼比,證實(shí)了有限元分析的有效性。應(yīng)用多體系統(tǒng)的理論對(duì)系統(tǒng)進(jìn)行誤差建模,分析了影響系統(tǒng)誤差的每個(gè)環(huán)節(jié),建立龍門式微銑削系統(tǒng)的誤差模型,為加工中誤差的補(bǔ)償提供了依據(jù)。以研制龍門式微銑削加工系統(tǒng)為實(shí)驗(yàn)平臺(tái),進(jìn)行了正交式微銑削實(shí)驗(yàn),研究了切削參數(shù)(主軸轉(zhuǎn)速、軸向切深、進(jìn)給速度)對(duì)零件表面粗糙度的影響規(guī)律,得到了合理的切削參數(shù)。進(jìn)行了零件表面粗糙度Cpk的計(jì)算,驗(yàn)證了龍門式微銑削系統(tǒng)加工狀態(tài)的穩(wěn)定性,所選切削參數(shù)的合理性。
[Abstract]:In this paper, based on the research background of micro parts cutting, a gantry micro milling system is designed and developed. The overall size of the system is 600mm 脳 600mm 脳 500mm. The system has four linear moving shafts and a rotary shaft. The machining range is 200mm 脳 50mm 脳 50mm. According to the requirement of small parts milling, the whole system and parts are designed. The dynamic and static structural analysis of the gantry structure is carried out by using the finite element analysis software, and the deformation trend and the position of the maximum deformation are studied. Secondly, the modal analysis of the gantry structure is carried out, and the natural frequency and the main vibration modes of the system are obtained. According to the deformation trend and modal of the gantry structure, the multi-objective parameter optimization of the beam and column is carried out to improve the static and dynamic stiffness of the structure, thus improving the performance of the system. The modal test of the machine tool is carried out by hammering test method. The natural frequency and damping ratio are obtained, and the validity of finite element analysis is verified. The theory of multi-body system is used to model the error of the system, and every link that affects the system error is analyzed. The error model of the gantry micro-milling system is established, which provides the basis for the error compensation in machining. The orthogonal micro-milling experiment was carried out on the platform of developing a gantry micro-milling system, and the influence of cutting parameters (spindle speed, axial tangent depth, feed speed) on the surface roughness of parts was studied. Reasonable cutting parameters are obtained. The calculation of surface roughness Cpk is carried out to verify the stability of the machining state and the rationality of the selected cutting parameters of the gantry micro-milling system.
【學(xué)位授予單位】：長春理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TG54

【參考文獻(xiàn)】

相關(guān)期刊論文 前3條

1 李曉舟;于化東;許金凱;李一全;趙平;;微切削加工中切削力的理論與實(shí)驗(yàn)[J];光學(xué)精密工程;2009年05期

2 宋志勇;商益存;趙金剛;;人造大理石床身在普通數(shù)控磨床中的應(yīng)用[J];精密制造與自動(dòng)化;2008年02期

3 張鵬;王波;盧禮華;梁迎春;;微小型超精密微細(xì)銑削機(jī)床的研制[J];制造技術(shù)與機(jī)床;2010年06期

，

本文編號(hào)：2178026