Casting Supplier Information Questions by emj68678

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									IET 264-51
Fundamentals of Work Design
Fall, 2003
Assignment # 5
Chapter # 5


D.H. Clamp Vise Company – operations process chart

Objective:    To demonstrate the ability to construct an operations process chart from
              information about the operations and materials used in the process.


Supplied with this assignment you will find information that was obtained by a process
engineer. The information includes drawings and a list of materials and processes with times
to fabricate and assemble small vises.


Assignment:

Using the information and drawings supplied with this assignment, create an operations
process chart for producing 750 vises per day. You are to chart the current method. Show,
on a separate sheet, your calculations and formulas used. Also note problems, questions,
assumptions, or any thoughts you may have about the process of creating this chart. Charts
can be done on computer (drawing software) or by hand. If done by hand, it must be neat
and legible. Use templates and straightedges, no freehand.




Each student is to turn in an assignment. All work is to be done neatly. Grammar and
spelling are important.
                                   V300 VISE ASSEMBLY


Base V300-01

      One required per vise
      Material: Cast Iron
      Operations:
                                                                  Time in decimal min.
                 1.    Receive casting from outside supplier
                 2.    Inspect                                           0.5
                 3.    Mill                                              5.0
                 4.    Drill 2 mounting holes, 2 setscrew holes          2.25
                 5.    Tap setscrew holes                                0.4
                 6.    Spot face mounting holes                          0.35
                 7.    Insert retaining setscrew                         0.15
                 8.    Insert positioning setscrew                       0.15
                 9.    Clean                                             1.1
                 10.   Mask                                              1.5
                 11.   Powder coat                                       2.4
                 12.   Inspect                                           1.0
                 13.   Stock


Moving Jaw V300-02

      One required per vise
      Material: Cast Iron
      Operations:

                 1.    Receive casting from outside supplier
                 2.    Inspect                                           0.5
                 3.    Drill through                                     0.5
                 4.    Turn shaft                                        1.4
                 5.    Bore screw pocket                                 1.1
                 6.    Face and chamfer ends                             0.9
                 7.    Mill jaw face, top and ends                       2.5
                 8.    Mill slot                                         1.8
                 9.    Drill hole                                        0.2
                 10.   Tap hole                                          0.15
                 11.   Insert positioning setscrew                       0.15
                 12.   Clean                                             1.0
                 13.   Mask                                              1.1
                 14.   Powder coat                                       2.0
                 15.   Inspect                                           1.0
                 16.   Stock




                                             Page 1 of 4
Screw V300-03

      One required per vise
      Material: 12L14 Steel
      Operations:
                                                                           Time in decimal min.
                  1.   Center drill                                                0.4
                  2.   Turn                                                        6.7
                  3.   Thread                                                      1.8
                  4.   Chamfer                                                     0.3
                  5.   Drill handle hole                                           0.5
                  6.   Clean                                                       1.1
                  7.   Inspect                                                     1.0
                  8.   Stock


End Nut V300-04

      One required per vise
      Material: 12L14 Steel
      Operations:

                  1.   Center drill                                               0.4
                  2.   Turn                                                       4.3
                  3.   Drill                                                      1.8
                  4.   Tap                                                        3.2
                  5.   Chamfer                                                    0.3
                  6.   Radius                                                     0.5
                  7.   Clean                                                      1.1
                  8.   Inspect                                                    1.0
                  9.   Stock


Handle V300-05

      One set (set includes ball ends) required per vise
      Material: 12L14 Steel
      Operations:

                  1.   Purchase
                  2.   Inspect (100%)                                             0.25
                  3.   Pre-assemble (press) one ball end to handle shaft          0.25
                  4.   Stock




                                             Page 2 of 4
Setscrew (retaining) V300-06

       One required per vise
       Material: Per supplier contract
       Operations:
                                                                      Time in decimal min.
                   1. Purchase
                   2. Stock


Setscrew (positioning) V300-07

       Two required per vise
       Material: Per supplier contract
       Operations:

                   1. Purchase
                   2. Stock




Assembly Operations:

                   1.    Insert screw (V300-03) into moving jaw (V300-02)    0.05
                   2.    Tighten retaining setscrew                          0.09
                   3.    Insert handle (V300-05) into screw (V300-03)        0.05
                   4.    Press ball onto end of handle                       0.2
                   5.    Insert end nut (V300-04) into base (V300-01)        0.06
                   6.    Tighten retaining setscrew                          0.09
                   7.    Assemble (insert moving jaw sub-assembly into       0.07
                         base sub-assembly)
                   8.    Turn handle to engage screw threads into nut and    0.13
                         close jaws
                   9.    Inspect                                             1.0
                   10.   Insert vise into packing box                        0.16
                   11.   To finished stock




                                             Page 3 of 4
            V300-01 Base




V300-02 Moving Jaw
                                         Note: these parts are
                                         not shown to scale




  V300-04 End Nut




      V300-03 Screw




                           Page 4 of 4

								
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