Mechanical Engineering Drawing Workshop. Sample Drawings. Sample 1. Sample 1. Sample 2. Sample /7/19. JIS Drawing Part 1

Transcription

1 Mechanica Engineering Drawing Workshop Sampe Drawings JIS Drawing Part Content:.Sampe Drawings 2.Drawing sheets 3. Views and projection methods 4. Line Conventions 5. Scaes 6. Sectiona drawings 7. Detai drawings 8. Dimensioning 9. Toerancing of Linear and Anguar Dimensions 2 Sampe Sampe 3 4 Sampe 2 Sampe 2 5 6

2 Sampe 3 Sampe Centering mark Drawing sheets Size A-A4 Drawing sheets Frame area 9 Tite bock Drawing sheets Views and projection methods Tite bock Frame area 2 2

3 Views Views 3 4 Views Orthographic projection third ange projection method B A C E B F D A:front view(principa view) B:top view C:eft side view D:right side view E:bottom view F:rear view C A D F E Symbo of third ange projection 5 6 Views Views Principa view Principa view

4 Views Views Principa view 3 The other views Principa view 9 2 Kinds of ines (continuity) Continuous ine Line Conventions Line Conventions Dashed ine Long-dashed dotted ine Long-dashed doube-dotted ine Kinds of ines (thickness) kinds thickness ratio 2 Thin ine Thick ine 2 Extra thick ine 4 22 Line Conventions Line Conventions How these ines are used kinds of ines thick continuous ine thin continuous ine thin dashed ine or thick dashed ine thin ong-dashed dotted ine thin freehand ine visibe ine dimension ine projection ine eader ine hidden outine center ine ine of imit of partia or interrupted view and section Thin ong-dashed dotted ine Thin freehand ine Thick continuous ine Thin dashed ine Thin continuous ine

5 Line Conventions Vaue of scaes Scaes Kinds of scaes endorsed scae Enargement scae 5: 2: : 5: 2: Fu scae : Reduction scae :2 :5 : :2 :5 : :2 :5 : :2 :5 : Dimensions are omitted Sectiona views J-J Cutting pane Cut by one pane K-K Cutting pane Dimensions are omitted Dimensions are omitted Cut by two panes A section of a symmetrica part Pane Pane 2 L

6 Dimensions are omitted Successive sections Detai drawings 3 32 Dimensioning Dimensioning Some dimensions are omitted Dimensioning symbos Description Symbo Usage diameter φ vaue of diameter. radius spherica diameter spherica radius R Sφ SR vaue of radius. vaue of diameter of sphere. vaue of radius of sphere. square vaue of square. thickness of board t vaue of thickness of board. 45 degree chamfers C vaue of 45 chamfers

7 Dimensioning Dimensions are omitted Dimensioning symbos Description Symbo Usage diameter φ vaue of diameter. radius spherica diameter spherica radius R Sφ SR vaue of radius. vaue of diameter of sphere. vaue of radius of sphere. square thickness of board t 45 degree chamfers C vaue of square. vaue of thickness of board. vaue of 45 chamfers. No arrow on the center point Dimensions are omitted Dimensioning Dimensioning symbos Description Symbo Usage diameter φ vaue of diameter. radius spherica diameter spherica radius R Sφ SR vaue of radius. vaue of diameter of sphere. vaue of radius of sphere. square vaue of square. thickness of board t vaue of thickness of board. 45 degree chamfers C vaue of 45 chamfers Dimensions are omitted Dimensioning Dimensioning symbos Description Symbo Usage diameter φ vaue of diameter. radius spherica diameter spherica radius R Sφ SR vaue of radius. vaue of diameter of sphere. vaue of radius of sphere. square vaue of square. thickness of board t vaue of thickness of board. 45 degree chamfers C vaue of 45 chamfers

8 Dimensioning Dimensioning symbos Description Symbo Usage diameter φ vaue of diameter. radius spherica diameter spherica radius R Sφ SR vaue of radius. vaue of diameter of sphere. vaue of radius of sphere. square vaue of square. thickness of board t vaue of thickness of board. 45 degree chamfers C vaue of 45 chamfers Dimensioning Dimensioning symbos Description Symbo Usage diameter φ vaue of diameter. radius spherica diameter spherica radius R Sφ SR vaue of radius. vaue of diameter of sphere. vaue of radius of sphere. square vaue of square. thickness of board t vaue of thickness of board. 45 degree chamfers C vaue of 45 chamfers Dimensioning Eements for dimensioning

9 Dimension vaue Dimensioning Dimension ine 3Termination arrow 4Projection ine 5Leader ine 6Reference ine 7Origin indicator Rues of dimensioning

10 55 56 Superimposed running dimensioning Dimension ine Outine Projection ine Center ine 59 6

11 Toerancing of Linear and Anguar Dimensions 6 62 Thank you. 63

12 Mechanica Engineering Drawing Workshop Screw Threads and Threaded Parts - Part : Genera Conventions (B2-) Content:. Drawing Screw Thread 2. ISO System of Limits and Fits 3. Genera Toerances 4. Symbos of Surface Texture JIS drawing part 2 2 Expression Expression Root Figure Crest Root Crest Figure 2 3 Figure 3 Figure 4 4 Expression Dimensioning Externa thread Figure 5 Figure 7 Figure 6 5 6

13 Dimensioning Interna thread ISO System of Limits and Fits -Part:Bases of Toerances, Deviations and Fits (B4) Figure 8 (front view) Figure 9 (front view) Figure (top view) These 3 figures show the same tapped hoe. 7 8 ISO System of Limits and Fits -Part:Bases of Toerances, Deviations and Fits ISO System of Limits and Fits -Part:Bases of Toerances, Deviations and Fits 9 ISO System of Limits and Fits -Part:Bases of Toerances, Deviations and Fits Hoe Toerance cass. Datum dimension Toerance cass Φ25 G 6 = φ (Φ25.7 ~ φ25.2) toerance zone Standard toerance grade 2 2

14 Hoe (Toerance Zone) Hoe( Size Toerance ) Φ25 G 6 Datum dimension (24~3) Datum Dimension (mm) Vaue of fundamenta deviation Lower deviation A of the standard toerance grades over to A B C CD D E EF F FG G H JS toerance zone (μm) +standard toerance/2 toerance zone Toerance zone Size toerance 3 Φ25 G 6 Datum dimension (8~3) Datum Dimension(mm) Standard toerance grade Standard toerance grade over to Size toerance(μm) Toerance zone.3 Size toerance (Φ25.7 ~ φ25.2) 4 Shaft Shaft (Toerance Zone ) Toerance cass Toerance cass Φ25 h 6 Datum dimension toerance zone Standard toerance grade = φ (φ ~ φ25.) Φ25 h 6 Datum dimension (24~3) Datum Dimension (mm) Vaue of fundamenta deviation Lower deviation A of the standard toerance grades over to a b c cd d e ef f fg g h js toerance zone (μm) +standard toerance/2 Size toerance toerance zone Shaft ( Size Toerance ) ISO System of Limits and Fits -Part:Bases of Toerances, Deviations and Fits Φ25 h 6 Standard toerance grade Size toerance Datum dimension (8~3) Datum Dimension(mm) Standard toerance grade over to Size toerance(μm) φ25g6 φ25h6 (φ ~ φ25.) 7 8 3

15 9 2 Tabe of Genera Fit System Combinations Reference of Fit System Combination Tabe : Hoe basis system of fits Tabe 2: Shaft basis system of fits Base hoe H6 H7 H8 H9 H Base shaft h5 h6 h7 h8 h9 Toerance cass of shaft Cearance fit g5 h5 f6 g6 h6 f6 g6 h6 e7 f7 h7 f7 h7 e8 f8 h8 d9 e9 d8 e8 h8 c9 d9 e9 h9 b9 c9 d9 Toerance cass of hoe Cearance fit H6 F6 G6 H6 F7 G7 H7 F7 H7 E7 F8 H8 D8 E8 F8 H8 D9 E9 H9 D8 E8 H8 D9 E9 H9 C9 B C D Toerance zone Zero ine Datum dimension 2 Base hoe H6 H7 H8 H9 f6 g5 h5 h6 f7 g6 h6 d9 e8 f7 f8 h7 h8 c9 d9 h9 Cassification Needs sufficient gap. (expansion, toerance, fitting ength) Rotating parts, or siding parts. Fitting parts which are often taken apart. Need detaied action. Tabe 3 22 Genera Toerances Genera Toerances -Part:Toerances for Linear and Anguar Dimensions without Individua Toerance Indications (B45) Standard Toerance Grade Datum Dimension over 3 over from.5 over 3 over 6 2 over 4 over Symbo Meaning to 3 to 6 to 3 to 2 to 4 to to 2 Limit deviations f fine ±.5 ±.5 ±. ±.5 ±.2 ±.3 ±.5 m medium ±. ±. ±.2 ±.3 ±.5 ±.8 ±.2 c coarse ±.2 ±.3 ±.5 ±.8 ±.2 ±2 ±3 v very coarse - ±.5 ± ±.5 ±2.5 ±4 ±6 Tabe 4: Permissibe dimensiona deviation of ength without chamfer. 23 Standard Toerance Datum Dimension Grade from.5 over 3 over 6 Symbo Meaning to 3 to 6 Limit deviations f fine ±.2 ±.5 ± m medium c coarse ±.4 ± ±2 v very coarse Tabe 5: Permissibe dimensiona deviation of ength of chamfer. 24 4

16 Genera Toerances Indication on a Drawing Standard Toerance Datum Dimension of Shorter Side of Target Ange JIS B standard toerance grade or under over over 5 over 2 over 4 Symbo Meaning to 5 to 2 to 4 Limit Deviations f fine ± ±3 ±2 ± ±5 m medium c coarse ± 3 ± ±3 ±5 ± v very coarse ±3 ±2 ± ±3 ±2 Tabe 6: Deviation Limits of Ange Symbos of Surface Texture Geometrica Product Specifications (GPS) -Indication of Surface Texture in Technica Product Specification (B3) Symbo of basic indication of surface texture Figure : Basic symbo Indication about removed process Figure 2: Remova processing is needed. Figure 3: Remova processing is not aowed. 27 Figure 4: Either is OK. 28 Symbo of Surface Texture Symbo of indication of round surface texture Indication of Surface Texture Ra: Arithmetic mean deviation Ra = f ( x) dx f(x):roughness profie : samping ength Figure 5: Round surface y f(x) 29 x 3 5

17 Indication of Surface Texture Indication of Surface Texture Ra: Arithmetic mean deviation Ra = f ( x) dx f(x):roughness profie : samping ength Ra: Arithmetic mean deviation Ra = f ( x) dx f(x):roughness profie : samping ength y y f(x) f(x) x x 3 32 Indication of Surface Texture Indication of Surface Texture Ra: Arithmetic mean deviation Ra = f ( x) dx f(x):roughness profie : samping ength Ra: Arithmetic mean deviation Ra = f ( x) dx f(x):roughness profie : samping ength y y f(x) f(x) x x Indication of Surface Texture Indication of Surface Texture Ra: Arithmetic mean deviation Ra = f ( x) dx f(x):roughness profie : samping ength Ra: Arithmetic mean deviation Ra = f ( x) dx f(x):roughness profie : samping ength y y f(x) R a f(x) x x

18 Indication of Surface Texture Indication of Surface Texture μm Tabe7: Standard vaues of Ra. Figure 6: Position Figure 7: Leader ine Bodface vaues have priority over the others Simpe Indication of Surface Texture Reference of Surface Texture Ra(μm) Function Finishing.5 mirror surface apping =..2.4 surface for siding O-ring.8 surface for O-ring fange.6 3.2~6.3 fits 2.5~25 5 emery paper fine machining eectrica discharge machining norma machining Figure 8: Simpe indication of a part of which most of the surfaces in the drawing have the same surface texture. 39 Tabe 8: Standard numbers of Ra. 4 Thank you 7

19 Mechanica Engineering Drawing Workshop Tips for design Necessary Knowedge of Actua Drawing and Design Techniques. 2 Corner R Corner R ( sampe hoder ) 3 4 Corner R ( sampe hoder ) Driing sampe sampe sampe

20 Wire-eectrica discharge machining Drawing-sampes of major parts 7 8 Screw thread Screw thread 9 Confat(CF) meta-sea fange ( reducer ) Confat(CF) meta-sea fange 2 2

21 Kwik-fange (KF) ( adapter ) Kwik-fange (KF) 3 4 O-ring sea O-ring sea 5 6 Mask Mask 7 8 3

22 Metric thread and inch thread Screws Standards Type of units Type of pitch metric coarse thread metric fine pitch thread UNC thread UNF thread metric thread inch thread coarse fine coarse Metric thread: Trianguar screw thread. Diameter and pitch are indicated as mm. 6 degrees thread ange. fine 9 Inch thread: Trianguar screw thread. Pitch is indicated as thread/inch. Coarse thread: Combination of diameter and pitch is genera and used most often. Fine thread: This thread type screw is used for specia uses. 2 Metric thread Metric thread Name of thread Pitch Priority Fine Coarse st 2nd 3rd Name of thread Pitch Priority Fine Coarse st 2nd 3rd (3) (3) UNC thread UNC thread Name of thread Thread/inch Pitch Diameter st priority 2nd priority No UNC No UNC No UNC No. 4-4 UNC No. 5-4 UNC No UNC No UNC No UNC No UNC /4-2 UNC 5/6-8 UNC /8-6 UNC /6-4 UNC /2-3 UNC /6-2 UNC /8 - UNC /4 - UNC /8-9 UNC Name of thread Thread/inch Pitch Diameter st priority 2nd priority - 8 UNC UNC /8 /4-7 UNC /8-6 UNC /2-6 UNC /4-5 UNC 4 / /2 UNC 4 / /2 UNC /4 2 /2-4 UNC /4-4 UNC UNC UNC /4 3 /2-4 UNC /4-4 UNC UNC

23 UNF thread UNF thread st priority Name of thread 2nd priority Thread/inch Pitch Diameter st priority Name of thread 2nd priority Thread/inch Pitch Diameter No. - 8 UNF No UNF No UNF No UNF No UNF No UNF No. 6-4 UNF No UNF No UNF No UNF /4-28 UNF 5/6-24 UNF No. - 8 UNF No UNF No UNF No UNF No UNF No UNF No. 6-4 UNF No UNF No UNF No UNF /4-28 UNF 5/6-24 UNF Interna thread Fanges for vacuum Confat(CF) meta-sea fange Standard of confat(cf) meta-sea fange Confat meta-sea fange is patented by Varian. This fange is used for UHV ( -6 Pa~). Usuay, they are caed ICF + diameter of fange, for exampe ICF7. (mm) Diameter Thickness Bot hoe Pipe to wed D T Quantity h C O.D d I.D. d

24 JIS fange ( VF/VG ) Standard of JIS fange Features O-ring seaing There are VG type and VF type fanges. VG has gasket groove. VF has no gasket groove. Used from ow vacuum to high vacuum. They are caed VF7, VG2, etc. Thickness Bot hoes Groove Diameter Pipe O.D. Name T Diameter P.C.D. I.D. O.D. Depth D Quantity d Casting Other h C G G2 S Bock for item ist Tips for actua drawing Bock for item ist e.g. Reference number, part name, materia, quantity, note etc. Tite bock e.g. Drawing number, tite, company or group name, cient s name, date, scae, projection method, genera toerance etc. Bock for item ist Tite bock Part drawing and assemby drawing Assemby drawing. Part drawings ony Reference numbers Weding symbo 2. Assemby drawings require Part drawings Bock for item ist Tite bock 35 Dimensions needed for assemby 36 6

25 Part drawing Practice Fit with the fange

26 = 4 5.8dri φ

27 Thank you Reference List: wikipedia.org (Engish page) Kenkyusha Onine Dictionary Pau Green. The Mechanica Engineering Drawing Desk Reference. 9