451 Week 11 postlab (CNC biomed)

docx

School

Purdue University *

*We aren’t endorsed by this school

Course

144

Subject

Mechanical Engineering

Date

Jan 9, 2024

Type

docx

Pages

Uploaded by CommodoreOpossum509

W EEK 11 P OST L AB – CNC MANUFACTURING AND B IOMEDICAL DEVICE /I NDOOR A IR Q UALITY Participating group members: C HAPTER 31 P OST L AB CNC M ANUFACTURING Q UESTIONS : 3. If the program commands were changed to S600 and F4.500, what differences would result? If the program commands were changed to S600 and F4.500, the RPM would decrease, and the Feed rate will increase. This might increase the load on the CNC machine. Complete the Table 1, working from the given program. Table 1: CNC program commands C OMMAND M EANING G00 R APID MOVEMENT G01 F EED RATE M OVEMENT G91 INCREMENTAL PROGRAMMING X0.000 Y0.000 P ART O RIGIN M03 TURN SPINDLE ON CLOCKWISE M30 END OF PROGRAM Z-.005 THE SPINDLE MOVES DOWN BY .005 OF A UNIT S1200 S=RPM RPM:1200 F3.000 F EED R ATE = 3.0 31-1

Figure 1: Program for this CNC lab module 31-2

C H 32 P OST L AB B IOMEDICAL D EVICE M ANUFACTURING AND A IR Q UALITY Q UESTIONS : US FED STD 209E cleanroom standards particle/ft³ Class 0.1 µm 0.2 µm 0.3 µm 0.5 µm 1 µm 5 µm 1 35 7 3 1 10 350 75 30 10 1 100 3500 750 300 100 10 1 1,000 1,000 100 10 10,000 10,000 1,000 100 100,000 100,000 10,000 1,000 ISO 14644-1 clean room standards particle/m³ Class 0.1 µm 0.2 µm 0.3 µm 0.5 µm 1 µm 5 µm ISO 1 10 2 ISO 2 100 24 10 4 ISO 3 1,000 237 102 35 8 ISO 4 10,000 2,370 1,020 352 83 31-3

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version

Access to all documents
Unlimited textbook solutions
24/7 expert homework help

ISO 5 100,000 23,700 10,200 3,520 832 29 ISO 6 1,000,000 237,000 102,000 35,200 8,320 293 ISO 7 352,000 83,200 2,930 ISO 8 3,520,000 832,000 29,300 ISO 9 35,200,000 8,320,000 293,000 Room Under Hood (Close) Under Hood (Far) Cutting Pass HHPC-6 (parts/L) (ARTI) 0.3μm 0.5μm 0.7μm 1.0μm 2.0μm 5.0μm 3002 574 327 247 127 20 2 0 0 0 0 0 36 8 5 5 4 0 28117 16983 11999 9186 4226 118 P-Trak (parts/cm 3 ) 160 parts/c m³ 1 parts/c m³ 6 parts/c m³ N/A Notes: * A high efficiency particulate air (HEPA) filter is designed to remove all particles at 99.7% efficiency if they are larger than 0.3 micron in diameter. ** An ultra low penetration air (ULPA) filter is designed to remove all particles at 99.999% efficiency if they larger than 0.12 micron in diameter. 31-4

US FED STD 209E Class 10 cleanroom standards converted to particle/L particle/L Class 0.1 µm 0.2 µm 0.3 µm 0.5 µm 1 µm 5 µm 1 10 12.4 2.65 1.06 0.4 0,04 100 1,000 10,000 100,000 4. Does POTR 257A likely meet the Class 10 federal standards for a clean room environment? Why or why not? Include your measured data in your answer. POTR 257A would not have met the Class 10 federal standards for a clean room environment. When converted to particles/L, POTR 257A would 3.002 0.3 µm particles/L which exceeds the Class 10 clean room standards. It would also have more 0.5 µm and 1 µm particles than a Class 10 clean room. 5. Does the air space under the laminar flow hood before the cut likely meet the Class 10 federal standards for a clean room environment? Why or why not? Include your measured data in your answer. The air space under the laminar flow hood before the cut would 6. Does the air space under the laminar flow hood during the cut likely meet the Class 10 federal standards for a clean room environment? Why or why not? Include your measured data in your answer. The airspace under the laminar flow hood during the cut would 7. This lab demonstrated a possible clean room manufacturing event for a biomedical device. What are some other possible manufacturing types and specific processes that you think might require a clean room approach? Manufacturing of chipsets or microprocessors might require a clean room approach. 8. Compare the particles found with the ARTI HHPC-6 and P-Trak. How many more particles in the room were discovered by the P-Trak particle counter? Make sure units are correct when comparing values. 31-5

Unfortunately, the P-Trak was not available during the lab, so the amount of particles can’t be compared. 31-6

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version