Kong Ji of casing of machine tool main shaft grants tagged option

  • Time:
  • Click:160
  • source:LAMOND CNC Machining
In the machine tool, main shaft part is mainer part, bearing is among them the most important element, the radial that it affects main shaft directly is jumpy reach end panel to beat. Because this installs the axis of bearing and bearing (namely main shaft casing) the influence of the working precision that precision, public errand cooperates pair of machine tools is crucial. The general configuration of accurate lathe main shaft: 1, the bearing manufacturer requirement to casing aperture generally speaking, the two aperture coaxial of aperture of main shaft casing spends the technology that is in abroad is the onefold spool thread that has enough length with in the data for fiducial, namely onefold and fiducial tagging method. Two bearing firm introduces to ask to the treatment of bearing aperture below. 1.

1The tagging of SKF company company of SKF of famous bearing manufactory is opposite international the requirement that coaxial of two bearing aperture spends is onefold and fiducial tag a law, specific requirement and data express 1, watch 2: Express the precision Normal LINE-HEIGHT of parameter of Center" Align=center> public errand: 150%; TEXT-ALIGN: Normal Align=center> axis: 150%; TEXT-ALIGN: Center" Align=center> bearing Normal LINE-HEIGHT of · of 150%">P4A · SP: Normal >PA9A · above: P4Cnormal >P4A · SP: Normal >PA9A · above: 150%"> circularity Tnormal >IT2/2normal >IT1/2normal >IT2/2normal >IT1/2normal > cylinder spends T1normal >IT2/2normal >IT1/2normal >IT2/2normal >IT1/2normal > curvature T2normal >IT3/2normal >IT2/2normal >normal >normal > jumpy T3normal >IT1normal >IT0normal >IT1normal >IT0normal > coaxial spends T4normal >IT4normal >IT3normal >IT4normal >IT3 expresses Normal TEXT-ALIGN of Center" Align=center> diameter: Normal Align=center> public errand: Normal Align=center> nominal: Center" Align=center> includes Normal Align=center>IT0normal Align=center>IT1normal Align=center>IT2normal Align=center>IT3normal Align=center>IT4normal Align=center>IT56100.

611.

52.

54610180.

81.

22358183011.

52.

5469305011.

52.

5471150801.

2235813801201.

52.

546101512018023.

558121818025034.

5710142025031546812162331540057913182540050068101520271.

2The tagging of NSK company company of NSK of famous bearing manufactory is opposite international the requirement that coaxial of two bearing aperture spends also is onefold and fiducial tag a law, specific requirement and data express 3: Express 3 bearing precision and Normal LINE-HEIGHT of internal diameter of room of Center" Align=center> bearing: 150%; TEXT-ALIGN: Grade of public errand of Center" Align=center> limit and surface roughness (μ M) Normal Align=center> circularity (○ ) Normal Align=center> cylinder spends B1 (│ ○ │ ) Normal Align=center> jumpy C1 (↑ ) Normal Align=center> coaxial spends D1 (◎ ) Normal LINE-HEIGHT of Center" Align=center> surface roughness: 150%; TEXT-ALIGN: Normal Align=center> accuracy class: Normal > accuracy class: Normal > accuracy class: Normal > accuracy class: Normal > accuracy class: 150%; TEXT-ALIGN: Center" Align=center> exceeds Normal Align=center> the following Normal >P5, p4normal >P3, p2normal >P5, p4normal >P3, p2normal >P5, p4normal >P3, p2normal >P5, p4normal >P3, p2normal >P5, p4normal >P3, p2normal Align=center>10normal Align=center>18normal Align=center>1normal Align=center>0.

6normal Align=center>1normal Align=center>0.

6normal Align=center>2.

5normal Align=center>1.

5normal Align=center>5normal Align=center>3normal Align=center>0.

4normal Align=center>0.

2normal Align=center>18normal Align=center>30normal Align=center>1.

2normal Align=center>0.

7normal Align=center>1.

2normal Align=center>0.

7normal Align=center>3normal Align=center>2normal Align=center>6normal Align=center>4normal Align=center>0.

4normal Align=center>0.

2normal Align=center>30normal Align=center>50normal Align=center>1.

2normal Align=center>0.

7normal Align=center>1.

2normal Align=center>0.

7normal Align=center>3.

5normal Align=center>2normal Align=center>7normal Align=center>4normal Align=center>0.

4normal Align=center>0.

2normal Align=center>50normal Align=center>80normal Align=center>1.

5normal Align=center>1normal Align=center>1.

5normal Align=center>1normal Align=center>4normal Align=center>2.

5normal Align=center>8normal Align=center>5normal Align=center>0.

4normal Align=center>0.

2normal Align=center>80normal Align=center>120normal Align=center>2normal Align=center>1.

2normal Align=center>2normal Align=center>1.

2normal Align=center>5normal Align=center>3normal Align=center>10normal Align=center>6normal Align=center>0.

8normal Align=center>0.

4normal Align=center>120normal Align=center>180normal Align=center>2.

5normal Align=center>1.

7normal Align=center>2.

5normal Align=center>1.

7normal Align=center>6normal Align=center>4normal Align=center>12normal Align=center>8normal Align=center>0.

8normal Align=center>0.

4normal Align=center>180normal Align=center>250normal Align=center>3.

5normal Align=center>2.

2normal Align=center>3.

5normal Align=center>2.

2normal Align=center>7normal Align=center>5normal Align=center>14normal Align=center>10normal Align=center>0.

8normal Align=center>0.

4normal Align=center>250normal Align=center>315normal Align=center>4normal Align=center>3normal Align=center>4normal Align=center>3normal Align=center>8normal Align=center>6normal Align=center>16normal Align=center>12normal Align=center>1.

6normal Align=center>0.

8normal Align=center>315normal Align=center>400normal Align=center>4.

5normal Align=center>3.

5normal Align=center>4.

5normal Align=center>3.

5normal Align=center>9normal Align=center>6.

5normal Align=center>18normal Align=center>13normal Align=center>1.

6normal Align=center>0.

82, the tagging of aperture of the casing in real work and in the real work in us, be the same as what the axis spends to tag to aperture of main shaft casing, it is the common spool thread that with scroll bearing the axes place of two journal makes normally for fiducial, namely communal and fiducial tagging method. 3, two kinds of fiducial changeover that tag a method are in actual production, for the stability of workpiece, fixed position convenient, treatment reachs detected need to wait, we often are chosen communal and fiducial tag a method, what ask with theoretic bearing so is onefold and fiducial cannot coincide, need attention is accordingly fiducial between changeover problem. 3.

1 onefold and fiducial the onefold spool thread that has enough length with with communal and fiducial definition is fiducial, namely onefold and fiducial element, with two circumgyrate journal (or aperture) the common spool thread that makes is fiducial, namely communal and fiducial element. 3.

Definition and law of check proved recipe are informed 2 basises by communal and fiducial reach by onefold and fiducial those who tag detect methodological measure and numerical value are as follows respectively: (1) in aperture 1 (fiducial aperture) be in in the middle of axes direction take one sectional circle, take the centre of a circle to nod 1; (2) be in likewise aperture 2 (treatment aperture) be in in the middle of axes direction take one sectional circle, take the centre of a circle to nod 2; (3) dot 1 reach a point 2 it is even the line common spool thread namely; (4) find out aperture respectively 1 reach aperture the axes line of 2 is columnar, δ of 2 2 times (2 δ of φ 2) it is aperture namely 2 pairs of communal and fiducial coaxial degree values (5) aperture the axes line of 1 and aperture the span between the axes line of 2 (it is △ approximately) it is aperture namely 2 pairs of aperture 1: When α ＝ β , △ ＝ is become when α ≠ β , △ ＝ △ , onefold and fiducial tag numerical value, communal and fiducial the 1/2 L that tags numerical value, K2 of span of two bearing Kong Jian, 2 axial of aperture dimension α , aperture 2 with β of horizontal included angle, aperture 1 use headstock with the type on basis of horizontal included angle (span 434.

5) takes the place of, calculated a few kinds to machine a circumstance to reach onefold and fiducial with communal and fiducial the numeric relation after tagging, ≈ of onefold and fiducial numerical value (6 ～ 7) is communal and fiducial numeric. The communal and fiducial numerical value that with Shenyang factory of the first machine tool tags formerly 0.

005, drew the onefold and fiducial numerical value below circumstance of a few kinds of treatment actually with some product headstock, be in basically 0.

03 above, as formulary as the computation above result is more adjacent. From above formula and example can see, value of deflection of position error of onefold and standard form is greater, it belongs to a more complex variable (change inside certain limits) , the circumstance of effective treatment deviation with the span between two bearing aperture, two aperture and the length that machine aperture are concerned, and have nothing to do with the length of fiducial aperture. Because its are not accorded with,assemble at the same time, treatment, measured real work requirement, it is unreasonable that consequently onefold and standard form is tagged. Be in actual in, the coaxial of casing aperture is spent get the influence of many sided. The oneself quality of handlers and the understanding that ask to blueprint craft are different; Measure the exploration error of machine, the error of probe itself; The treatment status of workpiece, exterior surface roughness; Detect methodological choice, the combination of the emplacement of workpiece, bougie; External environment detects for example the metropolis such as the temperature between, humidity gives measure the error with be brought certain. So the numeric meeting in applying actually has a lot of deviation, the two aperture coaxial that because this thinks,shows hole of casing of level main shaft is spent had better use communal and fiducial tag a method. CNC Milling CNC Machining