【摘要】：隨著微電子封裝業(yè)的蓬勃發(fā)展，微電子封裝技術(shù)被賦予了更高的要求，如封裝產(chǎn)品整體尺寸更小、密集程度更高、機(jī)械電氣連接性能更優(yōu)異、產(chǎn)品使用壽命更持久等。而作為微電子封裝技術(shù)中的關(guān)鍵技術(shù)——點(diǎn)膠技術(shù)，則必須相應(yīng)地實(shí)現(xiàn)驅(qū)動方式更精確、響應(yīng)頻率更快速、單點(diǎn)出膠液量更精確，以及膠點(diǎn)重復(fù)精度更高等技術(shù)要求。目前市場上的大部分點(diǎn)膠技術(shù)已很難滿足這些要求，而接觸式精密螺桿點(diǎn)膠技術(shù)作為一種新興的點(diǎn)膠技術(shù)，以其膠點(diǎn)精度高、一致性精度好、適用介質(zhì)范圍廣等優(yōu)點(diǎn)得到了日益密切的關(guān)注；目前，這種新興技術(shù)及相關(guān)產(chǎn)品，精密螺桿點(diǎn)膠泵，尚被國外技術(shù)壟斷。因此，對接觸式精密螺桿點(diǎn)膠泵進(jìn)行研究顯得尤為重要。本文從如下幾個方面對接觸式精密螺桿點(diǎn)膠泵進(jìn)行點(diǎn)膠機(jī)理研究和實(shí)驗(yàn)研究。 首先，本文對國內(nèi)外常見的點(diǎn)膠技術(shù)和對應(yīng)的點(diǎn)膠產(chǎn)品進(jìn)行介紹及優(yōu)缺點(diǎn)分析，著重介紹分析了接觸式精密螺桿點(diǎn)膠泵點(diǎn)膠原理的優(yōu)勢及研究現(xiàn)狀，并說明本文的研究方向和研究內(nèi)容；詳細(xì)分析了精密螺桿點(diǎn)膠泵進(jìn)行點(diǎn)膠作業(yè)的基本過程及整個點(diǎn)膠系統(tǒng)的工作原理，對精密螺桿點(diǎn)膠泵的核心部件轉(zhuǎn)子、定子進(jìn)行曲線方程、密封機(jī)理，以及工作過程中的精度誤差分析，提出了影響精密螺桿點(diǎn)膠泵點(diǎn)膠量及點(diǎn)膠精度的因素和原因；根據(jù)實(shí)際工況，設(shè)計(jì)一組轉(zhuǎn)子、定子，并進(jìn)行三維CATIA建模與裝配驗(yàn)證，以保證設(shè)計(jì)和加工的可行性；在轉(zhuǎn)子、定子工作部分的橫截面內(nèi)，利用FLUENT軟件對轉(zhuǎn)子、定子密封區(qū)域的流體進(jìn)行流動機(jī)理的有限元仿真分析，并深入研究轉(zhuǎn)子轉(zhuǎn)速、膠液粘度，以及轉(zhuǎn)子、定子配合間隙對精密螺桿點(diǎn)膠泵點(diǎn)膠精度的影響規(guī)律。 其次，，本文分析了精密螺桿點(diǎn)膠泵的結(jié)構(gòu)組成和運(yùn)動原理，對轉(zhuǎn)子、定子進(jìn)行了詳細(xì)的受力分析，得出了實(shí)際工況下轉(zhuǎn)子的受力情況；在此基礎(chǔ)上，為精密螺桿點(diǎn)膠泵選用合適的軸承和撓性軸，保證設(shè)計(jì)的力學(xué)可行性；設(shè)計(jì)并制作了精密螺桿點(diǎn)膠泵實(shí)驗(yàn)樣機(jī)；對于構(gòu)成精密螺桿點(diǎn)膠泵驅(qū)動系統(tǒng)的直流微電機(jī)、精密齒輪箱做了進(jìn)一步研究，對二者的結(jié)構(gòu)組成進(jìn)行闡述，并對直流微電機(jī)、精密齒輪箱的速度特性、電流特性、空載背隙特性及效率的影響因素進(jìn)行分析，得到了電機(jī)輸出軸轉(zhuǎn)矩和轉(zhuǎn)速關(guān)系式；搭建了點(diǎn)膠系統(tǒng)，并對搭建系統(tǒng)的各部分進(jìn)行分析。 再者，詳細(xì)分析了精密螺桿點(diǎn)膠泵對控制電路的要求，對開環(huán)控制方案和閉環(huán)控制方案進(jìn)行說明和分析比對，選取并詳細(xì)分析了電流轉(zhuǎn)速雙閉環(huán)控制方案的工作原理和流程；對控制電路中檢測信號的增量式編碼器進(jìn)行結(jié)構(gòu)與工作原理的說明；定制了合適的電機(jī)驅(qū)動器，并設(shè)計(jì)了精密螺桿點(diǎn)膠泵控制器，對控制器各部分功能做了詳細(xì)的說明。 最后，根據(jù)實(shí)驗(yàn)要求搭建完整的精密螺桿點(diǎn)膠泵實(shí)驗(yàn)平臺，分別從膠液粘度、電機(jī)轉(zhuǎn)速和供膠壓力的角度對精密螺桿點(diǎn)膠泵的點(diǎn)膠性能進(jìn)行實(shí)驗(yàn)測試，分析這些因素對點(diǎn)膠質(zhì)量精度的影響規(guī)律；通過實(shí)驗(yàn)得出實(shí)驗(yàn)條件下精密螺桿點(diǎn)膠泵樣機(jī)的性能：在電機(jī)兩端電壓24v的情況下，樣機(jī)完成一次完整點(diǎn)膠的最短時間為158ms，樣機(jī)適用膠液粘度從10poise至500poise，最小出膠量為0.0163ml，點(diǎn)膠精度誤差控制在±1.2％以內(nèi)。通過實(shí)驗(yàn)結(jié)果驗(yàn)證了樣機(jī)的可行性。
[Abstract]:With the rapid development of microelectronic packaging industry, microelectronic packaging technology has been given higher requirements, such as smaller overall size, higher density, superior mechanical electrical connection performance and longer service life. As a key technology in microelectronic packaging technology, it is necessary to realize more accurate driving mode, more rapid response frequency, more accurate single-point glue solution and higher repeat precision of glue point. At present, most of the glue technology in the market is very difficult to meet these requirements, and the contact type precision screw point glue technology is a new dot glue technology, which has the advantages of high glue point precision, good consistency precision, wide application range and the like, This new technology and related products, precision screw point glue pump, have been monopolized by foreign technology. Therefore, it is very important to study the contact precision screw point glue pump. In this paper, the research and experimental study of a contact-type precision screw-point glue pump are studied in this paper. First of all, this paper introduces the common point glue technology at home and abroad and the analysis of its advantages and disadvantages, and emphatically introduces the advantages and the research status of the principle of the point glue of the contact precision screw point glue pump, and explains the research direction and the research of this paper. In this paper, the basic process of the point glue operation and the working principle of the whole point glue system are analyzed in detail, the rotor and stator of the core component of the precision screw point glue pump are analyzed, the sealing mechanism and the precision error in the working process are carried out. In this paper, the factors and reasons for affecting the glue quantity of the precision screw point gel pump and the precision of the point glue are put forward. According to the actual working condition, a set of rotors and stators are designed, and the three-dimensional CATIA modeling and assembly verification are carried out to ensure the feasibility of design and processing. In the rotor and stator working part, the cross section In this paper, finite element simulation analysis of flow mechanism of fluid in rotor and stator seal area is carried out by FLUENT software, and the influence of rotor speed, viscosity of glue liquid, rotor and stator fit clearance on precision of precision screw point glue pump is studied deeply. Secondly, the structure composition and motion principle of precision screw point glue pump are analyzed, the rotor and stator are subjected to detailed stress analysis, and the force condition of the rotor under actual working condition is obtained. On the basis of this, a suitable shaft is selected for precision screw point glue pump. Bearing and flexible shaft, the mechanical feasibility of design is ensured; the experimental prototype of precision screw point glue pump is designed and manufactured; for the direct current micromotor which constitutes the driving system of precision screw point glue pump, the precision gear box is further researched, the structure composition of both is expounded, and the comparison is made. The influence factors of speed characteristic, current characteristic, no-load back gap characteristic and efficiency of DC micromotor and precision gear box are analyzed, and the relationship between motor output shaft torque and rotating speed is obtained. In addition, the requirements of the precision screw point glue pump to the control circuit are analyzed in detail, the open-loop control scheme and the closed-loop control scheme are explained and analyzed, and the two-loop control scheme of the current rotating speed is selected and analyzed in detail. The working principle and the flow of the detection signal in the control circuit are described; the explanation of the structure and the working principle is carried out on the incremental encoder of the detection signal in the control circuit; a suitable motor driver is customized and a precision screw point glue pump controller is designed to perform the work on each part of the controller; Finally, a complete precision screw point glue pump experiment platform is built according to the experiment requirement, and the glue performance of the precision screw point glue pump is tested by the viscosity of the glue liquid, the rotation speed of the motor and the pressure of the glue supply, and the factors are analyzed. The influence law of the quality precision of the dot glue is obtained. Through the experiment, the performance of the precision screw point glue pump prototype is obtained. Under the condition that the terminal voltage 24v of the motor is 24v, the shortest time of the prototype is 158ms, the viscosity of the prototype is from 10poise to 500poise, and the minimum is the minimum. The amount of glue is 0.0163ml, and the precision of glue is wrong. Difference control is within 1. 2%. Through experiment
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN405

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