An assembly chart for a simple gate valve is given in figure 1.1, part list and assembly information for the gate valve and processing information are given in figure 1.2. The following information is also available:

a. Casting are manufactured in-house.

b. Bar stock, nuts, screws, packaging can be obtained from a local supplier.

c. The design engineer specified that body bushing and handle be made of cast bronze and the cap and stem of the valve be machined from standard brass bar stock.

d. The following need to be fabricated: the bushing, stem, cap, handle.

e. Inspection is required for all fabricated parts prior to delivery to final assembly. Construct an operation process chart, precedence diagram and rout sheets.

Parts List Parts Body Bushing Stem Fiber packing Cap Handle Nut Part No. 001 002 003 004 005 006 Material Cast bronze Cast bronze 3/8 in. bar stock (Purchased part) 3/4 in. hex bar stock Cast bronze (Purchased part) 007 Part No. 001 002 Fabrication Operations Operation No. Standard time (min/part) 001-1 Cast Bench mold 1.50 001-2 Clean Tumble barrel 0.40 001-3 Machine-thread and Turret lathe 2.40 face three surfaces 002-1 Cast Bench mold 0.75 002-2 Clean Tumble barrel 0.20 002-3 Machine all i.d. Turret lathe 1.00 and o.d. 003-1 Machine all surfaces Automatic screw 0.30 and cut oft machine 005-1 Machine all surfaces Automatic screw 0.12 machine 006-1 Cast Bench mold 1.20 006-2 Clean Tumble barrel 0.30 006-3 Machine two surfaces 0.75 Turret lathe 006-4 0.75 Broach Broach square hole Figure 1.2: Processing information 003 005 006 Assembly Operations Operation Machine No. 1 Final assembly Clean Inspect (pressure test) Pack in boxes 2 Standard time (min/part) 2.00 0.60 1.20 0.12 Bench Solvent tank Water test stand Bench 3 4 Figure 1.2: Part list and assembly operations #1 Body A-1 #2 Bushing Assemble stem and bushing to body SA-1 #3 Stem #4 Packing SA-1 A-2 Assemble Cap #5 Cap #6 Handle A-3 Assemble Handle Nut #7 Final Inspection Figure 1.1: Assembly Chart