外文翻譯--單螺桿加工機床的布局和結構

1、<p><b>　　附錄：</b></p><p><b>　　外文資料與中文翻譯</b></p><p><b>　　外文資料：</b></p><p>　　Concerning single-screw machine layout and structure</p>&

2、lt;p>　　Decide the size of the compressor displacement of the stars round, screw diameter, mesh size and the size of the center distance, so different in diameter screw, machine tool spindle and the rotary center are a

3、lso different. To meet the processing of different diameter screw, single screw Currently the layout of machine tools in general there are several options. </p><p>　　The first is: machine tool rotary tool sp

4、indle center and the center distance for the fixed </p><p>　　Machine tool rotary tool spindle center and the center distance for the fixed, can not adjust the center distance. Processing of several of the sc

5、rew diameter on the center distance required several different specifications of the machine. </p><p>　　Advantages: simple structure of the machine. </p><p>　　Disadvantage: each machine can only

6、 process a specification of the screw, when the market on a certain specification requirements when the screw compressor, resulting in a machine, other machine idle. </p><p>　　The second: the machine tool sp

7、indle box for rotary </p><p>　　Processing screw machine according to the size of the diameter at the processing before a point of rotating spindle box. Spindle box that the machine can turn on a machine at t

8、he above-mentioned article on the use of the improvements, with the first structure of a machine tool is basically the same. </p><p>　　Advantages: the structure of machine tool easy to adapt to a variety of

9、specifications of the processing screw. </p><p>　　One disadvantage: after the rotating spindle box and the tool spindle turning center line distance between the center line of accurate measurement difficult.

10、 </p><p>　　2 disadvantage: after the rotating spindle spindle box and the front surface of the rotary cutter centerline distance between the reduction of the larger diameter of the screw processing is limite

11、d. </p><p>　　The third: the machine tool spindle box for horizontal mobile </p><p>　　Box at the bottom of the spindle and the base there is arranged between the rectangular sliding rail, spindle

12、 box perpendicular to the direction of movement of spindle centerline and perpendicular to the centerline of the tool rotation. Through the power of the spindle box spline shaft to the base of the tool feed mechanism. &l

13、t;/p><p>　　Screw diameter, according to the size of the processing in the processing of the previous round by hand to the body put into the screw spindle box moved to the appropriate location, and then screw th

14、e spindle box on a fixed base. Spindle box available from the mobile Grating detection, position error ± 0.005mm. </p><p>　　Horizontal spindle box can be used as a mobile machine can process diameter φ9

15、5 ~ φ385mm any kind between the screw specifications. </p><p>　　Φ95 ~ φ385mm processing because of the diameter of the screw, causing the front surface and the tool spindle rotation the distance between the

16、center line of the margin is too large, the actual application in the design specifications of the machine into two, a φ95 ~ φ205mm machine screw diameter Another φ180 ~ φ385mm machine screw diameter. </p><p&g

17、t;　　Advantages: a variety of tools to adapt to the specifications of the processing screw, each screw specifications need not be provided with the appropriate machine tools. </p><p>　　Disadvantage: the struc

18、ture of machine tools and machine tool assembly of the two kinds of more complex machine tools, machine tools than the cost of two kinds of machine tools before the high. </p><p>　　Second, introduce the stru

19、cture of machine tool spindle </p><p>　　The level of machine tool spindle box on the main axis and the base of the vertical axis determines the degree of precision was the precision screw machining, at the s

20、ame time screw compressor at a speed of thousands of high-speed rotary switch, the accuracy of the screw will be less so that the compressor have a fever, vibration, low efficiency, such as wear and tear situation quickl

21、y. </p><p>　　Currently available single-screw machine spindle structure of the program has the following two. </p><p>　　The first is: bearing radial clearance is not adjustable spindle structure

22、 </p><p>　　Before spindle bearing out the use of one pairs of cylindrical roller bearings and thrust ball bearing combination of both, the main use of double row cylindrical roller bearings under radial cutt

23、ing force, the use of two ball bearings to bear axial thrust cutting force. </p><p>　　After the general adoption of the spindle bearings out one pairs of cylindrical roller bearings or a ball bearing to the

24、heart. </p><p>　　Main advantages of this structure: the main axis of the processing and assembly of simple, low cost. </p><p>　　One disadvantage: because the main axis of the radial bearing clea

25、rance can not be adjusted so poor precision spindle. Although the use of bearings and shaft diameter fit to eliminate the radial bearing clearance, but each bearing diameter and radial clearance is not a fixed value, so

26、it is difficult to design and processing to the quasi-axial-radial and bearings with bore tolerances. </p><p>　　2 disadvantage: it is very difficult to buy in the market of domestically produced or imported,

27、 C, D or P4, P5 class thrust ball bearings, machine tool manufacturing plant commonly used alternative to the use of ordinary class bearings, which also affected the accuracy of the enhance spindle. </p><p>

28、　　Bearing radial clearance adjustable spindle structure do not apply to the general accuracy of the general machine tools, does not apply to require a higher accuracy of the spindle of machine tools. </p><p>

29、;　　The second: the radial bearing clearance adjustable spindle structure </p><p>　　Before the adoption of a spindle bearing P4 class of double row tapered hole cylindrical roller bearings and a P4-class doub

30、le row ball bearing thrust to the combination of heart. The use of the spindle hole of the double row tapered cylindrical roller bearings under radial cutting force, the use of double row ball bearing thrust to the heart

31、 to bear part of the axial and radial cutting force cutting force. </p><p>　　Spindle bearings generally used after a P5 class of double row tapered hole cylindrical roller bearings. </p><p>　　Do

32、uble row tapered hole cylindrical roller bearings with inner ring and shaft are tapered 1:12, bearing lock nut with a round led a bearing in the axial displacement of the inner ring bearings and expansion, to reduce or e

33、liminate Bearing radial clearance purposes. </p><p>　　Main structure of such advantages: high precision spindle. At the front spindle diameter φ230mm noodle on the end measuring spindle Beat value of 0.010mm

34、. Φ230mm cylindrical spindle at the front end on the radial axis measurement value of Beat 0.005mm. The second structure of the spindle of a precision spindle accuracy than the first about 50% improve. </p><p&

35、gt;　　Main disadvantage of this structure: </p><p>　　The principal axis of the more complicated process, the spindle assembly also has the experience necessary to make the workers to operate the spindle achie

36、ve the desired numerical accuracy. </p><p>　　Third, the depth of the tool feed control </p><p>　　Required different processing screw diameter spiral groove depth is also different from the depth

37、 of the spiral groove mm from dozens to more than 100 millimeters range around the tool into the institutions required to feed the thousands of ring rotation in order to achieve a screw machining . </p><p>　

38、　Feed because of the tool in the tool rotating at the same time achieve motion feed, so on a number of general machine tools used in mechanical, electrical control method of depth of cut does not apply to single-screw ma

39、chine. </p><p>　　Single screw machine tools give agencies into the following different methods can be feed to control the depth of purpose. </p><p>　　The first is: friction clutch and electrical

40、 switches to control the depth of the tool feed </p><p>　　Its principle is to control depth of cut increases the tool cutter feed mechanism increases the load torque so that the tool feeding mechanism of the

41、 friction transmission chain slipping clutch, a mechanical linkage concurrent silent trigger electrical switches, optical signal prompted operator, when manual operator to disconnect the tool into the power sector. </

42、p><p>　　The advantages of this control method are: the control method is simple and spare parts processing and operational power from the impact of a sudden. </p><p>　　Disadvantage are: processing

43、of different diameter screw to adjust the clutch friction discs pressed the preload spring. </p><p>　　Material because of the density of each screw, and the hardness of the existence of subtle differences in

44、 the degree of cutting tools sharp differences exist, thus the accuracy of this control method was not too accurate, may lead to screw spiral groove depth tolerance is too large. </p><p>　　The second: use of

45、 an electromagnetic clutch, encoder control tool into the mix to the depth of </p><p>　　Tool feed system, equipped with electromagnetic clutch and a tool for detecting the number of rotating ring gear and a

46、gun encoder. </p><p>　　It is a tool of control principle hand screw surface encoder to start counting switch, then start counting counting device, when the rotary tool to pre-set number of laps when the cutt

47、ing depth is reached, the electromagnetic clutch automatic off open to the power tool into the concurrent silent, optical signal parts prompted the operator has finished processing. </p><p>　　The detection d

48、evice through the digital display shows the number of feed circles or feed. Torn off and the electromagnetic clutch, the tool does not only into the rotation with the vertical shaft to the sport. </p><p>　　T

49、he advantages of this control method are: the depth of the spiral groove screw tolerance control more accurate, because of several significant table shows the depth of processing, or want a few laps and the depth of proc

50、essing or circle the number of operations is also very intuitive and user-friendly. </p><p>　　Disadvantage are: electrical control of machine tools at the same time more complex parts of this control method

51、at the processing plant, if a sudden power failure, the prior data set will be lost. </p><p>　　If you add in the electrical control of the battery to power at the early-dimensional detection devices to maint

52、ain the job, the problem can be resolved. </p><p>　　Four, the control gear drive space </p><p>　　Single screw machine screw in the processing, due to the spiral groove in the rotary tool and the

53、 workpiece rotation to complete the synthesis process. Just cut into the workpiece when the tool in the tangential direction of rotation has been going on a greater resistance knife, cutting tool at the workpiece to be c

54、ut when the role of the spiral groove, the tool in the tangential direction of rotation has been going up against a smaller knife and even by the spiral groove thrust workpiece. </p><p>　　Because there is a

55、box-hole processing machine tool, gear and other processing error, the tool axis of rotation of the drive space is too large, large amount of so-called open. </p><p>　　Detect drive way too much space is a fi

56、xed power input shaft and output shaft rotation shaking, in the case of the transmission structure of conventional design and manufacture of machine tools, the transmission output shaft angle space at more than ten degre

57、es 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. </p><p>　　Upon completion of the

58、 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. </p><p>　　Machine tools in the mechanical tr

59、ansmission 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,

60、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. </p><p>　　Single-scr

61、ew machine has the Main Drive from other machine tool structure specificity. In order to reduce transmission or reasonable gap single-screw machine tools currently used by the following two ways. </p><p>　　T

62、he first is: the installation at the output shaft brake </p><p>　　Tool at the output shaft rotating the location of cylindrical symmetry with radial brake, brake stand up to the tool front-end of the cylindr

63、ical rotary output shaft, brake for spring preload. </p><p>　　The working principle of the brake is generated by the friction brake to increase the output shaft damping, reducing the sensitivity of the rotat

64、ion axis. </p><p>　　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

65、 there is a certain effect. </p><p>　　One disadvantage: the pre-spring brake tool because of the cylindrical output shaft to exert a greater radial force, in fact increases the load machine torque, resulting

66、 in increased motor power at the same time gears, bearings to accelerate wear and tear. </p><p>　　Disadvantage 2: pre-spring brake because of the output shaft of the cylindrical tool to exert a greater radia

67、l force on the possible geometry of the tool output shaft a negative impact on accuracy. </p><p>　　Conclusion: This article describes four areas from existing single-screw machine layout and structure, and p

68、ut out the advantages and disadvantages of the list, because of the compressor plant single-screw machine tools and machine tool external Security information, the above introduction there is inevitably one-sided and wro

69、ng, and are therefore single-screw compressor for the production of reference works. </p><p><b>　　中文翻譯：</b></p><p>　　單螺桿加工機床的布局和結構</p><p>　　一、介紹機床的布局 </p><p&g

70、t;　　壓縮機排氣量的大小決定了星輪、螺桿直徑的大小和嚙合中心距的大小，因此螺桿直徑的不同，機床的主軸與刀具的回轉中心也不同。為滿足加工不同直徑的螺桿，目前國內單螺桿加工機床的布局大致有以下幾種方案。 </p><p>　　第一種：機床的主軸與刀具回轉中心的中心距為固定式 </p><p>　　機床的主軸與刀具回轉中心的中心距為固定式，中心距不可調整。加工幾種直徑的螺桿就需要幾種中心距規(guī)格

71、不同的機床。 </p><p>　　優(yōu)點：機床的結構簡單。 </p><p>　　缺點：每種機床只能加工一種規(guī)格的螺桿，當市場上某種規(guī)格的壓縮機螺桿需要量大時，造成一臺機床加工，其他機床閑置。 </p><p>　　第二種：機床的主軸箱為可回轉式 </p><p>　　機床可根據(jù)加工螺桿直徑的大小在加工前把主軸箱旋轉一個角度。這種主軸箱能夠回

72、轉的機床是對上述第一種機床在使用方法上的改進，與第一種機床的結構基本相同。 </p><p>　　優(yōu)點：機床的結構簡單，能適應多種規(guī)格螺桿的加工。 </p><p>　　缺點1：主軸箱旋轉后主軸回轉中心線與刀具回轉中心線間的距離不易精確測量。 </p><p>　　缺點2：主軸箱旋轉后主軸前端面與刀具的回轉中心線間的距離減少，因此加工較大直徑的螺桿受到限制。 <

73、;/p><p>　　第三種：機床的主軸箱為橫向移動式 </p><p>　　主軸箱底部與底座之間布置有矩形滑動導軌，主軸箱移動的方向垂直于主軸回轉中心線并垂直于刀具回轉中心線。主軸箱的動力通過花鍵軸傳給底座內的刀具進給機構。 </p><p>　　根據(jù)加工螺桿直徑的大小，在加工前用手輪絲杠進給機構把主軸箱移動到適當位置，然后用螺釘將主軸箱固定在底座上。主軸箱的移動距離可

74、用光柵尺檢測，位置誤差±0.005mm。 </p><p>　　采用主軸箱可橫向移動的一個機床就可以加工直徑φ95～φ385mm之間任何一種規(guī)格的螺桿。 </p><p>　　由于加工φ95～φ385mm直徑的螺桿，造成主軸前端面與刀具回轉中心線間的距離差值過大，因此在實際應用時設計成兩種規(guī)格的機床，一個機床加工φ95～φ205mm直徑的螺桿，另一個機床加工φ180～φ385mm

75、直徑的螺桿。 </p><p>　　優(yōu)點：機床能適應多種規(guī)格螺桿的加工，每種規(guī)格的螺桿不需要配備相應的加工機床。 </p><p>　　缺點：機床的結構和機床的裝配較前二種機床復雜，機床的造價也較前二種機床高。 </p><p>　　二、介紹機床的主軸結構 </p><p>　　機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

76、桿的精度，同時螺桿在壓縮機中以幾千轉的速度高速旋轉時，精度較差的螺桿會使壓縮機產(chǎn)生發(fā)熱、振動、效率低、磨損快等現(xiàn)象。 </p><p>　　國內目前現(xiàn)有的單螺桿加工機床主軸結構大致有以下兩種方案。 </p><p>　　第一種：軸承徑向游隙不可調的主軸結構 </p><p>　　主軸前軸承采用1個雙列圓柱滾子軸承和兩個推力球軸承組合，該主軸使用雙列圓柱滾子軸承承受徑

77、向切削力，使用兩個推力球軸承承受軸向切削力。 </p><p>　　主軸后軸承一般采用1個雙列圓柱滾子軸承或采用1個向心球軸承。 </p><p>　　這種主軸結構的優(yōu)點：主軸的加工和裝配簡單，造價較低。 </p><p>　　缺點1：由于主軸軸承的徑向游隙不可調整，所以主軸精度較差。雖然可以利用軸承的內徑和軸徑的過盈配合來消除軸承的徑向游隙，但每個軸承的內徑和徑向

78、游隙不是一個固定值，因此設計和加工時很難給準軸徑與軸承內徑的配合公差。 </p><p>　　缺點2：在市場上很難買到國產(chǎn)或進口的C、D級或P4、P5級的推力球軸承，機床生產(chǎn)廠常用普通級軸承替代使用，此舉也影響了主軸精度的提高。 軸承徑向游隙不可調的主軸結構適用于一般精度的普通機床，不適用于對主軸精度要求較高的機床。 </p><p>　　第二種：軸承徑向游隙可調的主軸結構 </p&

79、gt;<p>　　主軸前軸承采用一個P4級圓錐孔的雙列圓柱滾子軸承和1個P4級的雙列向心推力球軸承組合。該主軸使用圓錐孔的雙列圓柱滾子軸承承受徑向切削力，使用雙列向心推力球軸承承受軸向切削力和部分徑向切削力。 </p><p>　　主軸后軸承一般采用1個P5級圓錐孔的雙列圓柱滾子軸承。 </p><p>　　圓錐孔雙列圓柱滾子軸承的內圈和配合軸徑均為1：12圓錐，用圓螺母鎖緊

80、軸承則使軸承在軸向產(chǎn)生一個位移并使軸承的內圈膨脹，從而達到減少或消除軸承徑向游隙的目的。 </p><p>　　這種主軸結構的優(yōu)點：主軸精度較高。在主軸前端面φ230mm直徑上測量主軸的端面跳動值為0.010mm。在主軸前端φ230mm外圓上測量主軸的徑向跳動值為0.005mm。第二種結構的主軸精度比第一種主軸精度提高50%左右。 </p><p>　　這種主軸結構的缺點： </p&

81、gt;<p>　　主軸的加工工藝較復雜，主軸的裝配也需要有經(jīng)驗的工人操作才能使主軸精度達到理想數(shù)值。 </p><p>　　三、刀具進給深度的控制 </p><p>　　不同直徑的螺桿需要加工螺旋槽的深度也不同，螺旋槽的深度從幾十毫米到一百多毫米不等，刀具進給機構大約需要旋轉進刀幾千圈才能完成一個螺桿零件的加工。 </p><p>　　由于刀具進給機構

82、在刀具旋轉的同時還要完成進刀動作，所以一些在普通機床上常用的機械、電氣控制切深的方法都不適用于單螺桿加工機床。 </p><p>　　單螺桿加工機床的刀具進給機構采用以下不同的方法都可以達到控制進刀深度的目的。 </p><p>　　第一種：摩擦離合器和電氣開關控制刀具進給深度 </p><p>　　它的控制原理是刀具切深增大時刀具進給機構的負載扭距增大，使刀具進給

83、機構傳動鏈中的摩擦離合器打滑，一個機械連桿機構觸發(fā)電氣開關并發(fā)出聲、光信號提示操作者，此時操作者人工操作斷開刀具進給機構的動力。 </p><p>　　這種控制方法的優(yōu)點是：控制方法簡單及零件加工和操作不受突然斷電的影響。 </p><p>　　缺點是：加工不同直徑的螺桿需要調整摩擦離合器壓緊碟簧的預緊力。 </p><p>　　由于每個螺桿材質的密度、硬度存在細微

84、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確，可能導致螺桿螺旋槽的深度公差過大。 </p><p>　　第二種：用電磁離合器、編碼器組合控制刀具進給深度 </p><p>　　刀具進給系統(tǒng)中，裝有電磁離合器及一對用于檢測刀具轉動圈數(shù)的測速齒輪和一個編碼器。 </p><p>　　結論：本文從四個方面介紹了國內現(xiàn)有單螺桿加工機床的布局和結構，并把優(yōu)缺