單螺紋桿機(jī)畢業(yè)設(shè)計(jì)外文翻譯--對(duì)壓縮機(jī)單螺桿專(zhuān)用加工機(jī)床的介紹-預(yù)覽頁(yè)
【正文】 the transmission output shaft angle space at more than ten degrees to the dozens of degrees. Transmission gap caused by too large spiral screw groove surface then there is obvious marks, thus affecting the machining accuracy of the screw. Upon pletion of the assembly machine tool axis of rotation of the drive space is too large, in fact are subject to various errors gear, creating a backlash of the gear is too large. Machine tools in the mechanical transmission gear are used regardless of the accuracy of a few of the class, the designers take into account the gear manufacturing error, processing error box center distance, temperature, lubricating oil film thickness, the assembly error and other factors, machine design must ensure that transmission gear A certain amount of backlash, backlash decide the size of the gear tooth thickness tolerance size. Singlescrew machine has the Main Drive from other machine tool structure specificity. In order to reduce transmission or reasonable gap singlescrew machine tools currently used by the following two ways. The first is: the installation at the output shaft brake Tool at the output shaft rotating the location of cylindrical symmetry with radial brake, brake stand up to the tool frontend of the cylindrical rotary output shaft, brake for spring preload. The working principle of the brake is generated by the friction brake to increase the output shaft damping, reducing the sensitivity of the rotation axis. Are: brake and easy does not change the structure of the original machine tool structure, the method of indirect reduction to achieve the purpose of drive space, in practical applications there is a certain effect. One disadvantage: the prespring brake tool because of the cylindrical output shaft to exert a greater radial force, in fact increases the load machine torque, resulting in increased motor power at the same time gears, bearings to accelerate wear and tear. Disadvantage 2: prespring brake because of the output shaft of the cylindrical tool to exert a greater radial force on the possible geometry of the tool output shaft a negative impact on accuracy. Conclusion: This article describes four areas from existing singlescrew machine layout and structure, and put out the advantages and disadvantages of the list, because of the pressor plant singlescrew machine tools and machine tool external Security information, the above introduction there is inevitably onesided and wrong, and are therefore singlescrew pressor for the production of reference works. 對(duì)壓縮機(jī)單螺桿專(zhuān)用加工機(jī)床的介紹 摘要：本文從四個(gè)方面介紹了國(guó)內(nèi)現(xiàn)有單螺桿加工機(jī)床的布局和結(jié)構(gòu)，并把優(yōu)缺點(diǎn)一一列舉出來(lái)，由于壓縮機(jī)生產(chǎn)廠的單螺桿加工機(jī)床和機(jī)床資料對(duì)外保密，以上介紹難免有片面、不妥之處，因此僅供單螺桿壓縮機(jī)生產(chǎn)廠參考。加工幾種直徑的螺桿就需要幾種中心距規(guī)格不同的機(jī)床。這種主軸箱能夠回轉(zhuǎn)的機(jī)床是對(duì)上述第一種機(jī)床在使用方法上的改進(jìn)，與第一種機(jī)床的結(jié)構(gòu)基本相同。 第三種：機(jī)床的主軸箱為橫向移動(dòng)式 主軸箱底部與底座之間布置有矩形滑動(dòng)導(dǎo)軌，主軸箱移動(dòng)的方向垂直于主軸回轉(zhuǎn)中心線并垂直于刀具回轉(zhuǎn)中心線。 采用 主軸箱可橫向移動(dòng)的一個(gè)機(jī)床就可以加工直徑 φ95～ φ385mm之間任何一種規(guī)格的螺桿。 二、介紹機(jī)床的主軸結(jié)構(gòu) 機(jī)床主軸箱的水平主軸和底座上的立式的主軸精度的高低決定了被加工螺桿的精度，同時(shí)螺桿在壓縮機(jī)中以幾千轉(zhuǎn)的速度高速旋轉(zhuǎn)時(shí)，精度較差的螺桿會(huì)使壓縮機(jī)產(chǎn)生發(fā)熱、振動(dòng)、效率低、磨損快等現(xiàn)象。 這種主軸結(jié)構(gòu)的優(yōu)點(diǎn)：主軸的加 工和裝配簡(jiǎn)單，造價(jià)較低。 軸承徑向游隙不可調(diào)的主軸結(jié)構(gòu)適用于一般精度的普通機(jī)床，不適用于對(duì)主軸精度要求較高的機(jī)床。 圓錐孔雙列圓柱滾子軸承的內(nèi)圈和配合軸徑均為 1： 12圓錐，用圓螺母鎖緊軸承則使軸承在軸向產(chǎn)生一個(gè)位移并使軸承的內(nèi)圈膨脹，從而達(dá)到減少或消除軸承徑向游隙的目的。第二種結(jié)構(gòu)的主軸精度比第一種主軸精度提高 50%左右。 單螺桿加工機(jī)床的刀具進(jìn)給機(jī)構(gòu)采用以下不同的方法都可以達(dá)到控制進(jìn)刀深度的目的。 由于每個(gè)螺桿材質(zhì)的密度 、硬度存在細(xì)微差異及刀具鋒利程度也存在差異，因此使這種控制方法的精度不太準(zhǔn)確，可能導(dǎo)致螺桿螺旋槽的深度公差過(guò)大
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