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Screw Compressor Rotor Training manual Screw Compressor Rotor Training manual.

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Presentation on theme: "Screw Compressor Rotor Training manual Screw Compressor Rotor Training manual."— Presentation transcript:

1 Screw Compressor Rotor Training manual Screw Compressor Rotor Training manual

2 1. Part position.....………………………………………………… 2 2. Probe setup …………………………………………………… 3 3. Import nominal profile data……………………………………… 4 4. Create helical vector …………………………………………… 9 5. File structure …………………………………………………… Screw compressor rotor‘s function ………………………… Define Screw compressor rotor’s data ……………………… Create PC-DMIS part program ……………………………… Execute part program & evaluate dimension ……………… Report analysis ……………………………………………… 29 Contents

3 1.Part position on the CMM Table – Rotation axis of the Screw Compressor= Z axis of the CMM. - Part rotation – any, prefferably use some references, like pictures bellow 2 X Y X Z X Z X Y FemaleMale

4 2. Probe setup Stylus number is configured the same as the number of teeth of the part. Stylus No.1 = -X axis direction (not a must, but a good suggestion – see pictures bellow) 3 TIP 1 TIP 2 TIP 3 TIP 4 TIP 5 TIP 1 TIP 2 TIP 3 TIP 4 X Y X Y Teeth = 5 Teeth = 4

5 3. Import nominal profile data 1) Import nominal profile from a text file. (X,Y Data) 4 XY Import text file Name of Profile

6 5 3. Import nominal profile data 2.1) Import nominal profile from a 3D CAD model After you import the 3D CAD model from PC-DMIS using Linear_Open_Scan, generate an off-line scan to extract nominal profile. Create the scan in CCW direction!

7 6 3. Import nominal profile data 2.2) Import nominal profile from a 3D CAD model Start CA and import the nominal profile generated in PC-DMIS.

8 7 3. Import nominal profile data 3) Adjust the data Change the Z value of the points to “0”. Check again the point flow – must be CCW!

9 8 Female Profile Male Profile

10 9 4. Create helical vector Length of Lead per pitch Helix direction Probe radius compensation (Generally ‘0’) Probe R comp direction ※ In case imported nominal profile from a 3D CAD model, there might be ni need of create helical vector.

11 10 Eventually show the vectors, to ensure yourself, they are created correctly.

12 11 5. File structure C: \ CurveAnalyzer \ Scrcomp \ S/C rotor part data(spec) file PC-DMIS Part program file CurveAnalyzer Measured data file C: \ CurveAnalyzer \ Scrcomp \ ”Name of S/C rotor part data”_Saved \ Backup files of CurveAnalyzer Measured data file ※ C/A Measured file name + date & time Backup folder of CurveAnalyzer Measured data files CurveAnalyzer Measured data files PC-DMIS Part program files S/C rotor part data files

13 12 6. Screw compressor rotor’s function. CurveAnalyzer menu Measure -> Screw compressor rotors… Create PC-DMIS Part program Execute part program & evaluate List of Part data files Profile view (top face of S/C rotor) Summary view part data Evaluate current measurement Create new part Edit selected part Delete selected part Create copy of the current part Manage backup – recall/delete Setup measuring and evaluation parameters

14 13 7. Define Screw compressor rotor’s data. CurveAnalyzer menu Measure -> Screw compressor rotors… -> New

15 14 7. Define Screw compressor rotor’s data 1) Define generally geometry data - Female Part’s ID or Name Select nominal profile Tooth width of S/C rotor (Z axis direction) Length of lead Choose two points of the nominal profile for set the rotate axis

16 15 7. Define Screw compressor rotor’s data 1) Define generally geometry data - Male Part’s ID or Name Select nominal profile Tooth width of S/C rotor (Z axis direction) Length of lead Choose two points of the nominal profile for set the rotate axis

17 16 7. Define Screw compressor rotor’s data 1) Define generally geometry data – Profile view mode Click right mouse button Section profile view Top face full profile Rotate profile Adjust the top face of the actual part, as it will be placed on the CMM, and the like, click left mouse button. ※ ㅣ = Lead The highlighting is No.1 of profiles Counter clockwise 2,3,4…

18 17 7. Define Screw compressor rotor’s data 2) Measurement configuration Safety distance of part around Z axis safety height from top face Probe approach distance for alignment Probe approach distance for measurement Currently probe name & shape

19 18 7. Define Screw compressor rotor’s data 2) Measurement configuration – Probe setup Name of probe (As in PC-DMIS!) Stylus numbers Direction of No.1 tip Diameter of stylus If you use a index probe head. Changes in the following format. => T1A90B-90

20 19 7. Define Screw compressor rotor’s data 3) Alignment setup Auto vector point Defined scan Unknown scan Upper diameter Lower diameter Cylinder height Z Position Setup alignment location & range

21 20 7. Define Screw compressor rotor’s data 3) Profile measurement setup - Female Profile form tolerance Ref. Is Nominal Ref. Is Measured Profile & probe view for measurement height. Check if OK! Eventually change Z position! All = Full profile measurement 1 = No.1 profile measurement Auto vector point Defined scan Unknown scan

22 21 7. Define Screw compressor rotor’s data 3) Profile measurement setup - Male Profile form tolerance Ref. Is Nominal Ref. Is Measured All = Full profile measurement 1 = No.1 profile measurement Profile & probe view of measurement height Auto vector point Defined scan Unknown scan

23 22 7. Define Screw compressor rotor’s data 4) Lead measurement setup - Female Lead total form tolerance Lead measurement location view All = Full lead measurement 1 = No.1 lead measurement Auto vector point Defined scan Unknown scan Point number of nominal profile for Flank 1 measurement Same as the rotate axis points Point number of nominal profile for Flank 2 measurement Flank 1 Flank 2

24 23 7. Define Screw compressor rotor’s data 4) Lead measurement setup - Male Lead total form tolerance All = Full lead measurement 1 = No.1 lead measurement Lead measurement location view Auto vector point Defined scan Unknown scan Point number of nominal profile for Flank 1 measurement Point number of nominal profile for Flank 2 measurement

25 24 7. Define Screw compressor rotor’s data 4) Lead measurement setup – Graphic display mode Radial Position Flank 1 Tips Flank 2 Tips Scanning rage view of Flank 1 Adjust scanning range of Flank 1 Default = 0 Scanning rage view of Flank 2 Adjust scanning range of Flank 2 Default = 0

26 25 7. Define Screw compressor rotor’s data 5) Pitch measurement setup

27 26 8. Create PC-DMIS part program. CurveAnalyzer menu Keep PC-DMIS opened, but with no PP opened. Then : Measure -> Screw compressor rotors… -> Generate PC-DMIS PP ※ Before click PC-DMIS PP button Executed PC-DMIS.

28 27 9. Execute part program & evaluate dimension. CurveAnalyzer menu Measure -> Screw compressor rotors… -> Measure & Evaluate Part information & comment

29 28 9. Execute part program & evaluate dimension. PreAlignment – Manual measuring 1. Top face, 3point probing. (use Tip1) ※ In the case of first-run part program, set slow speed of Jogbox. 2. Outer diameter of top face, 3point probing. (use Tip1)

30 Report analysis Female – Individual Profile & Lead Error Profile form error Lead form error Lead total form error Lead slope error Lead evaluate location Lead length error Profile evaluate location

31 Report analysis. Female – Full Profile, Lead, Pitch Error Profile form error Total form error of a lead RUNOUT of Ext dia RUNOUT of Int dia Average lead length of total Flank1 Total form error of full leads Individual Pitch error Adjacent Pitch error Cummulative Pitch error

32 Report analysis. Female – Full Profile Error Profile Total form error RUNOUT of Ext dia RUNOUT of Int dia Profile + dir form error Profile - dir form error Profile - dir out of tolerance Profile + dir out of tolerance

33 Report analysis. Female – Full Lead Error Lead form error Lead slope error Lead total form error Lead length error

34 Report analysis. Male - Report


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