1. Assessment, CAD
Flóra Hajdu
B406

2. Content Assessment of course CAD in the industry 2019.07.03.
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3. Schedule of course 2019.07.03. Hajdu Flóra Week Topic Drawing CAD 1
Drawing
CAD 1
Assessment
CAD in the production process
Assembly drawings
Basic part modeling (contracted rectangle) 2
Geometric tolerances
Sketching 3
Fits, allowances and tolerances
Extrude (bearing housing, slotted plate) 4
Bolted connections
Revolve (shaft) 5
Pins, keys, axial retaining rings
Complex part modeling (crown nut) 6
Bearings
Drawing – views, dimensioning (bearing housing) 7
Shafts, spline shafts
Drawing – tolerances, surface finish (slotted plate) 8
Gears, springs
Drawing (shaft) 9
Pulleys, taper lock bush, special connections
Parametric modeling (clamping pin) 10
Welded, soldered, glued and riveted connections
Advanced part modeling (sweep, helical sweep, cotter, bolt) 11
Seals
Assembly modeling (bearing-shaft-plate assembly) 12
Mid-term test 13
Break (01.05) 14
Re-test
Schedule of course
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4. Assesment 2 homeworks (14+20) – 34%
2 tasks on practical classes (2x3) – 6%
2 mid-term tests ( ) -60%
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5. Homeworks Successful homework is max. 14 and 20 marks
Task
Start
Deadline
Homework 1 (14) (CAD model and drawing of a part)
1. week
11. week
Homework 2 (16+4) (assembly drawing – by hand)
12. week
Successful homework is max. 14 and 20 marks
If the task can not be accepted (does not reach 50%), it can be re-done, but the maximum score is only 7 and 10 marks in this case.
At least 50% of the maximum 34 marks (ie 17 marks) should be reached, otherwise the mid-term mark will be inadequate (signature denied!)
Homework and re-done homework can only be submitted during the lecture period!
In case of delay the achieved marks will be reduced!
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6. Practical class tasks Each task is worth 3 marks
Expected on the 5. week and 10. week.
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7. Mid-term tests Topics: CAD and drawing
Expected time 12. week, available score 20 and 40.
For the grade at least 50% of the maximum marks (ie. 10 and 20 marks) should be reached on each tests, otherwise the mid-term mark will be inadequate (1)
Inadequate test can be corrected with a re-test in the 14. week
The maximum score of the re-test is 50% (10 and 20 marks)
Inadequate mid-term test can be corrected with an exam during the examination period, but only if the other requirements (ie. 50% from the homeworks) are fulfilled.
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8. Grade 0 - 49 marks inadequate 1 50 - 60 marks adequate 2
marks average 3
marks good 4
marks excellent 5
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9. Obligatory material Obligatory material Recommended material
Presentation slides
C. Jensen, J. D. Helsel, D. R. Short: Engineering Drawing&Design
Recommended material
Standards by István Házkötő
Herczeg István: Szerkesztési Atlasz (in Hungarian)
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10. Homepages rs1.sze.hu/~hajdfl https://mgt.sze.hu/content/index/id/6442/
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11. Software download
count.jsp?tab=academic
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12. CAD (Computer Aided Design)
CAD (Computer Aided Design): refers to a family of computer- based technologies that are used to create, analyse and optimize engineering design
CAD programs provide a graphical user interface (GUI) that
allows the user to create and manipulate of 2D and 3D geometry
Produce engineering drawings
Conduct basic enngineering analysis such as mass properties calculations
Visualize individual parts and complex assemblies
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13. Development of CAD systems
1960s: companies in the automotive and aerospace industries started to use large mainframe computer systems
1970s: introduction of interactive computer graphics terminals, first CAM (computer aided manufacturing) software
1980s: more powerful PC-s based on Intel processors, small comapnies were able to afford new CAD systems
1990s: more advanced 3D CAD packages using solid modeling and NURBS (non-uniform rational B-splines), CIM (Computer Integrated Manufacturing) and concurrent engineering also came into use
The integration of CAD into engineering and manufacturing advanced due to the development of high-speed networking and the Internet
2000s: advanced visualization systems such as Virtual Reality and more powerful systems that had better display systems and greatly increased storage capacity
Development of CAD – development of CAM and CAE systems
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14. CAD systems
CAD software permits the rapid exchange of design and manufacturing information regardless of where the team members may be located
This global view and the teamwork it requires are key characteristics of manufacturing and design in the 21st century
CAD systems consists of 2 major components:
Hardware: physical components of the system: computer system, graphics display, input devices, output devices, other specialized equipment
Software: CAD program, related support programs or utilities, operating system
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15. CAD programs
Inexpensive 2-D drafting programs – more robust and expensive systems capable of sophisticated 3D modeling using solid and surface modeling
Autocad, Solidworks, CREO, Catia, etc.
Based on a mouse driven windows environment
Ability to extend the functionality of the software by creating of aquiring specialized software modules
kép
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16. CAD modeling
Geometric models in 3D provide accurate information on the shape of a part or assembly for use in CAE or CAM
All models are achieved using basic, underlying 2D and 3D elements
CAD allows additional information (volume, surface area) to be easily determined
CAD allows easy construction of orthographic views, pictorial images or drawings

17. CAD modeling CAD modeling Wire-Frame Modeling Surface modeling
Solid modeling
Use edges and vertices
First and easiest type
Least suitable for manufacturing and engineering
Allows the surfaces of a part to be accurately represented as geometric meshes
Automotive and aerospace industry
Creates 3D geometric models whose interior details are unambigously defined
Produce parts that can be manufactured

18. Thank You for Your attention!