喜歡就充值下載吧。。資源目錄里展示的文件全都有，，請放心下載，，有疑問咨詢QQ:414951605或者1304139763 ======================== 喜歡就充值下載吧。。資源目錄里展示的文件全都有，，請放心下載，，有疑問咨詢QQ:414951605或者1304139763 ======================== Ultrasonics 38 (2000) 7276www.elsevier.nl/locate/ultrasOne-dimensional longitudinaltorsional vibration converterwith multiple diagonally slitted partsJiromaru Tsujino*, Tetsugi Ueoka, Kenichi Otoda, Atsushi FujimiFaculty of Engineering, Kanagawa University, Yokohama 221-8686, JapanAbstractFor increasing the available vibration velocity of the one-dimensional longitudinaltorsional vibration converter, a new typeof complex vibration converter with multiple slitted parts installed in the positions avoiding longitudinal nodal positions alongthe converter for decreasing the maximum vibration stress level at the vibration nodal part was studied. The free end of theconverter vibrates in an elliptical or circular locus. Complex vibration systems with elliptical to circular or rectangular to squareloci can be applied effectively for various high-power applications, including ultrasonic welding of metal or plastics, ultrasonicwire bonding of IC, LSI and electronic devices, and also ultrasonic motors. The converter with multiple slitted parts was improvedin the vibration stress level and the quality factor compared with the converter with single slitted part. 2000 Elsevier ScienceB.V. All rights reserved.Keywords: Circular vibration locus; Complex vibration; Complex vibration ultrasonic welding; Longitudinaltorsional vibration converter;Ultrasonic motor; Ultrasonic plastic welding; Vibration converter with diagonal slits1. Introductionvibration characteristics because the maximum vibrationstress along the converter is decreased in comparison tothe converter with a slitted part, and the maximumComplex vibration systems with elliptical to circularvibration amplitude of the converter increases signifi-or rectangular to square loci are effective for variouscantly. Vibration locus, and vibration velocity and phasehigh-power applications. A one-dimensional longitudi-distributions along the converter were measured by twonaltorsional vibration converter with a slitted part atlaser Doppler vibrometers. The new-type converterslongitudinal vibration nodal area driven by a longitudi-were used for ultrasonic plastic welding and ultrasonicnal vibration system is useful for high-power applica-motors.tions including ultrasonic welding of various materials,The maximum available vibration velocity increasedultrasonic wire bonding of bonding of IC, LSI andsignificantly with the new converter. Welding character-electronic devices, and also ultrasonic motors 14. Aistics of plastic materials were improved by the complexnew type of converter with multiple slitted parts, forvibration converter.improving the vibration characteristics and increasingThe longitudinal and torsional vibration amplitudesthe available vibration velocity of the converter, isof a 15 mm diameter of a new converter for an ultrasonicstudied. The slitted parts are installed in multiple posi-motor increased to about 12 mm (peak-to-zero value)tions avoiding longitudinal nodal positions along thefrom 6 mm with a former converter under the sameconverter for decreasing the maximum vibration stressdriving voltage 60 Vrms at 55 kHz.level at the vibration nodal part. Using multiple slittedThe converter with multiple slitted parts was foundparts, the maximum vibration stress along a converterto be effective for improving the vibration characteristicsdecreases and the quality factor increases, and theand increasing the available complex vibration velocity.maximum vibration amplitude increases significantly atthe same driving voltage 5. The converter has superior2. Configurations of vibration converters* Corresponding author. Tel.: +81-45-481-5661;Configurations of two examples of the vibrationfax: +81-45-491-7915.E-mail address: tsujinocc.kanagawa-u.ac.jp (J. Tsujino)converters 20 mm in diameter and 79 mm in length, with0041-624X/00/$ - see front matter 2000 Elsevier Science B.V. All rights reserved.PII: S0041-624X(99)00175-473J. Tsujino et al. / Ultrasonics 38 (2000) 72764. Complex vibration ultrasonic plastic welding4.1. Vibration characteristics of a complex vibrationconvertersFig. 2 shows the relationship between driving fre-quency and longitudinal and torsional vibration velocityof a complex vibration system with the vibration con-verter (a). The driving voltage is kept constant at20 Vrms. Longitudinal and torsional vibration velocitieshave maximum values at different frequencies at around26.3 and 26.4 kHz. The elliptical locus is obtained atthe free edge of the converter.Torsional and radial vibration velocity distributionsat 26.8 kHz along a complex vibration converter withFig. 1. Various one-dimensional longitudinal to torsional vibrationdouble slitted parts (a) and (b) are shown in Fig. 3. Oneconverters with double slitted parts.torsional vibration velocity nodal part is within a leftslitted area, and the vibration velocities have maximumvalues at the free edge.The radial vibration velocity distribution along aslitted parts that were installed avoiding a longitudinalcomplex vibration converter with double slitted partsnodal part, are shown in Fig. 1. The cylindrical longitu-dinaltorsional vibration converters, made of aluminumalloy (JISA7075B), had two slitted parts on both sidesof a longitudinal vibration nodal part at its circumfer-ence. The converters were driven by a longitudinalvibration source. Various converters with (a) differentand (b) the same angle diagonally slitted parts weremade in the trials. The vibration converter part had 18diagonal slits of 45 or 135, 10 mm width and 0.5 mmwidthwerecut alongitscircumferenceusinganelectrosparking machine. The slit depth was altered from1.0 to 3.0 mm. The free edge part of the convertervibrated longitudinally and torsionally and vibrated inan elliptical locus.Fig. 2. Torsional and radial vibration velocity distributions along com-plex vibration converters (a) and (b). Driving voltage: 20 Vrms.3. Vibration characteristics of the converters with twoslitted partsThe free admittance loops of the total vibrationsystems with the converters Fig. 1(a) and (b) weremeasured. The quality factor and motional admittance,|Ymo|, of the vibration system with a converter withdifferent angle slitted parts (a) and the same angle slittedparts (b) were about 600 and 30 mS under weldingconditions of two 1.0 mm thick polypropyrene sheetswith a static pressure of 890 kPa. The admittance loopsof the vibration system with the converters show singlecircular shapes because the resonance frequencies of thelongitudinal and torsional vibrations are close. Thequality factors and motional admittances of the bothFig. 3. Relationship between driving frequency, and longitudinal andsystems are large. Elliptical loci were obtained at thetorsional vibration velocity of a complex vibration system with a vibra-tion converter (A). Driving voltage: 20 Vrms.free edges of the converters.74J. Tsujino et al. / Ultrasonics 38 (2000) 7276(a) is also shown in Fig. 3 (dotted line). A radialand double slitted parts. In the case of the converterwith single slitted part, the slitted part is positioned atvibration velocity maximum position means a longitudi-a nodal position of the longitudinal vibration along thenal vibration nodal position, and the longitudinal nodalcylindrical longitudinaltorsional vibration converters.position is positioned between two slitted parts. TheOn the contrary, in the case of the converter with twotwo slitted areas exist out of the longitudinal nodalslitted parts, the slitted parts are positioned avoidingposition where the vibration stress has a maximum valuethe longitudinal vibration nodal position. The converteralong the converter.with diagonal slits is driven by a longitudinal vibrationsource of two piezoelectric ceramic (leadzircontita-4.2. Welding characteristics of complex vibrationnate; PZT) disks, 15 mm in diameter and 5.0 mm inultrasonic plastic weldingthickness. The vibration converter slitted part has 12diagonal slits of 45 or 135 and 0.5 mm in width and 10The relationship between welding time, specimenor 5 mm in length, cut by an electrosparking machinedeformed thickness at the welded parts and the weldalong the circumference of these converters fabricatedstrength of the lapped polypropyrene sheets (1.0 mm infrom aluminum alloy (JISA7075B). The slit depths ofthickness), welded using a 27 kHz complex vibrationthe 15 mm diameter converter are altered from 1.5 tosystem with a converter (a) and (b), is shown in Fig. 4.3.5 mm. The free edge of the converter vibrates longitu-The weld strengths obtained by the system with con-dinally and torsionally and vibrates in an elliptical locus.verter (a) are larger than those with a converter (b).The PZT longitudinal vibration transducers, a longi-The welding time required becomes shorter using thetudinal vibration rod with a flange for supporting thevibration system (a) with a larger torsional vibrationmotor and a slitted cylinder are clamped by a connectingcomponent. The decrease in specimen deformed thick-bolt. The driving part of the converter and the rotorness at the welded parts roughly corresponds to thepart are statically pressed using corned disk springs byobtained weld strength. Specimens were welded in aa center bolt and nuts. The driving surfaces of theshorter welding time using a complex vibration systemconverter (JISA7075B) and the rotor (steel: SKD-61 orcompared with a longitudinal vibration system. ComplexSK-4: tempered) are ground to be flat and smooth usingvibration is effective for ultrasonic welding of plastic15002000 mesh polishing powder.materials as for metal materials.5.2. Vibration characteristics of 15 mm diameterultrasonic motors5. Ultrasonic motors with a longitudinaltorsionalconverterThe longitudinal and torsional vibration amplitudesat the free edge of these converters were measured by5.1. Configuration of ultrasonic motorstwo laser Doppler vibrometers when the driving fre-quency was altered. These converters have near-reso-The configurations of the ultrasonic motors andnance frequencies of the longitudinal and torsionalvibration converters, 15 mm in diameter, are shown invibrations similar to Fig. 2. The largest longitudinalFig. 5. Fig. 5(a) and (b) show the configurations ofvibration amplitudes of the converter of single and two15 mm diameter motors using a converter with singleslitted parts without a rotor part were about 6 and12 mm (peak-to-zero value) at frequencies of 5055 kHz.The largest longitudinal vibration amplitudes of theseconverters with a rotor part are about 3 and 9 mm atfrequencies near to 55 kHz. The largest vibration ampli-tudes of a converter with double slitted parts are abouttwo to three times compared with the amplitudes of aconverter with single slitted part.5.3. Vibration loci at the driving surface of the converterIn these cases, the longitudinal vibration is partiallyconverted to torsional vibration at the slitted parts, andthe cylinder part of the converter vibrates longitudinallyand torsionally. The vibration locus at the free edge isdetermined by the vibration phase difference betweenFig. 4. Relationship between welding time, deformed weldment heightthese vibrations. Vibration loci at the driving surfacesand weld strength of the lapped polypropyrene sheets (1.0 mm in thick-of longitudinaltorsional converters were measuredness), weldedusing a 27 kHz complexvibration systemwith a converter(a) and (b).using two laser Doppler vibrometers (20 MHz) that75J. Tsujino et al. / Ultrasonics 38 (2000) 7276Fig. 5. Configurations of 15 mm diameter ultrasonic motors using a longitudinaltorsional vibration converter with single slitted part (a) anddouble slitted parts (b).detect longitudinal and torsional vibrations indepen-length of the ultrasonic motor of 15 mm diameter in thedriving frequency 55.1 kHz (without a rotor) anddently. The vibration locus is shown on a digital memoryoscilloscope screen as a Lissajous figure. Fig. 6 shows54.26 kHz (with a rotor). The vibration locus amplitudeat the driving surfaces of converter decreases slightlythe vibration loci at the driving surfaces of converterswith double slitted parts of 3.3 mm depth and 5 mmwhen the ultrasonic motor rotates.Fig. 6. Vibration loci at a driving part of a 15 mm diameter converter with and without a rotor part.76J. Tsujino et al. / Ultrasonics 38 (2000) 72766. Conclusionmaterials.The15 mmdiameterultrasonicmotor,together with a converter with double slitted parts,rotated at over 300 rpm.For increasing the available vibration velocity of thecomplex vibration converter, a new type of converterThe converters with multiple slitted parts were foundto be effective for improving the vibration characteristicswith multiple slitted parts was studied.This converter has multiple slitted parts that areand increasing the available complex vibration velocity.installed in multiple positions, avoiding nodal positionsalong the converter for decreasing the maximum vibra-tion stress level at the vibration node part. The weldingReferencescharacteristics of ultrasonic plastic welding using com-plex vibrations were studied. Also, 15 mm diameter1 J. Tsujino, T. Ueoka, T. Shiraki, K. Hasegawa, R. Suzuki, M.ultrasonic motors using converters with double slittedTakeuchi, Proc. Int. Congress on Acoustics (1995) 447450.parts were tested.2 J. Tsujino, Proc. IEEE 1995 Ultrasonics Symp., IEEE, New York,The longitudinal vibration nodal part was located1996, pp. 10511060.between two slitted parts of the converters. The driving3 J. Tsujino, T. Uchida, K. Yamano, T. Iwamoto, T. Ueoka, Proc.2nd World Congress on Ultrasonics, Yokohama, Japan (1997)surface of the converter and the ultrasonic motor with152153.double slitted parts vibrated at higher vibration velocities4 J. Tsujino, T. Uchida, K. Yamano, T. Iwamoto, T. Ueoka, Proc.than those with a single slitted part at the same driv-IEEE1997UltrasonicsSymp.,IEEE,NewYork,1998,ing voltage.pp. 855860.The converter with double slitted parts significantly5 J. Tsujino, T. Ueoka, Proc. IEEE 1999 Ultrasonics Symp., IEEE,New York, 1999, pp. 723728.improved the ultrasonic welding characteristics of plastic河南理工大學(xué)萬方科技學(xué)院 本科畢業(yè)設(shè)計（論文）開題報告 題目名稱 帶式輸送機(jī)驅(qū)動裝置設(shè)計 學(xué)生姓名 張平 專業(yè)班級 機(jī)制07-2班 學(xué)號 0720150081 一、 選題的目的和意義： 通過調(diào)研目前市場上的各種帶式輸送機(jī)驅(qū)動裝置，設(shè)計出性價比更高更合理的驅(qū)動裝置，更好的解決目前煤礦運輸系統(tǒng)中的問題。 樹立正確的設(shè)計思想，為以后在工作中遇到相關(guān)問題提供解決依據(jù)，同時培養(yǎng)我們綜合運用所學(xué)的基礎(chǔ)理論、基本知識和基本技能，提高分析解決實際問題的能力，領(lǐng)會基本理論和深化理論知識，檢驗學(xué)生綜合素質(zhì)與實踐能力。 接受工程師必須的綜合訓(xùn)練，提高實際工作能力，如調(diào)查研究、查閱文獻(xiàn)和收集資料并進(jìn)行分析的能力；制訂設(shè)計或試驗方案的能力；設(shè)計、計算和繪圖能力；總結(jié)提高撰寫論文的能力。 通過本次畢業(yè)設(shè)計，能使我們把先修的基礎(chǔ)和專業(yè)基礎(chǔ)課程中所獲得的理論知識在實際的設(shè)計工作中綜合地加以應(yīng)用，通過畢業(yè)設(shè)計之后能夠熟練應(yīng)用有關(guān)參考資料、計算圖表、手冊；熟悉有關(guān)的國家標(biāo)準(zhǔn)和部頒標(biāo)準(zhǔn)，為以后成為優(yōu)秀的工程技術(shù)人員打下良好的基礎(chǔ)。 二、 國內(nèi)外研究綜述： 皮帶輸送機(jī)技術(shù)的現(xiàn)狀國外皮帶輸送機(jī)技術(shù)的發(fā)展很快，其主要變現(xiàn)有兩個方面：一方面是皮帶輸送機(jī)的功能多元化，應(yīng)用范圍夸大化，如高傾角帶式輸送機(jī)，管式帶輸送機(jī)，空間轉(zhuǎn)彎皮帶輸送機(jī)等各種機(jī)型；另一方面是皮帶輸送機(jī)本身的技術(shù)與裝備有了巨大的發(fā)展，尤其是長距離，大運量，高帶速等大型皮帶輸送機(jī)已成為發(fā)展的主要方向，其核心技術(shù)是開發(fā)應(yīng)用于帶式輸送機(jī)動態(tài)分析與監(jiān)控技術(shù)，提高了帶式輸送機(jī)的運行性能和可靠性。 三、 畢業(yè)設(shè)計（論文）所用的主要技術(shù)與方法： 1. 在學(xué)校圖書館查閱相關(guān)資料。 2. 在工廠的實踐畢業(yè)實習(xí)。 3. 通過老師和工程師的指導(dǎo)。 4. 通過瀏覽因特網(wǎng)上的相關(guān)資料。 5. 通過對相關(guān)資料和數(shù)據(jù)的理論計算和分析 四、 主要參考文獻(xiàn)與資料獲得情況： [1] 張國輔主編 . 礦山井下煤倉與礦倉 . 煤炭工業(yè)出版社 1983. [2] 張嵐 弓海霞 劉宇輝主編 . 新編實用液壓技術(shù)手冊 . 人民郵電出版社 2008 [3] 王益群 高殿容主編 . 液壓工程師技術(shù)手冊 . 化學(xué)工業(yè)出版社 2010 [4] 李壯云主編 . 液壓氣動與液力工程手冊 . 電子工業(yè)出版社 2008 [5] 雷天覺主編 . 新編液壓工程手冊 . 北京理工大學(xué)出版社 1998 [6] 辛一行主編 . 現(xiàn)代機(jī)械設(shè)備設(shè)計手冊 . 機(jī)械工業(yè)出版社 2000 [7] 徐灝主編 . 機(jī)械設(shè)計手冊 . 機(jī)械工業(yè)出版社 1991 [8] 何慶主編 . 機(jī)械制造專業(yè)畢業(yè)設(shè)計指導(dǎo)與范例 . 化學(xué)工業(yè)出版社 2008 [9] 杜文豐主編 . Auto CAD2004中文版機(jī)械制圖 . 北京大學(xué)出版社 2003 [10] 顧崇銜 主編. 機(jī)械制造工藝學(xué). 陜西科學(xué)技術(shù)出版社 1999 [11]孔慶華 劉傳紹 主編. 極限配合與測量技術(shù)基礎(chǔ). 同濟(jì)大學(xué)出版社，2002 [12] 孫桓 陳作模 葛文杰主編. 機(jī)械原理 . 高等教育出版社 2006 [13] 濮良貴 紀(jì)名剛編著. 機(jī)械設(shè)計 . 高等教育出版社 2007 五、 畢業(yè)設(shè)計（論文）進(jìn)度安排（按周說明） 第5~6周：熟悉設(shè)計題目，掌握所設(shè)計的系統(tǒng)的工作原理，通過網(wǎng)絡(luò)、圖書館尋找相關(guān)的資料，并認(rèn)真閱讀，逐步形成設(shè)計思路，完成畢業(yè)設(shè)計開題報告； 第7~10周：著手開始設(shè)計，通過查閱相關(guān)資料和設(shè)計手冊，設(shè)計各個零件的形狀、尺寸，統(tǒng)籌兼顧，并不斷完善各種尺寸； 第11~13周：在老師的指導(dǎo)下，修改設(shè)計的零件，使整個系統(tǒng)更加完善、合理。然后用Auto CAD軟件，繪制各零件圖和裝配圖圖； 第14~16周：整理設(shè)計資料，完成畢業(yè)設(shè)計論文 六、 指導(dǎo)教師審批意見： 指導(dǎo)教師： （簽名） 年 月 日 3