Show manufacturing process
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Obtain materials for screwdriver
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Steel Bar:
Stainless Steel 410 Green wire
Diameter 0.4in
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Machined to
Diameter: 0.38 in
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Check for correct size
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NO
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Scrap if to small
Diameter < .379in
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YES
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NO
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Handle:
Cellulose acetate rosin and Liquid plasticizer
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Scrap if too short
Length < 5.49in
or too narrow
Width < 0.037in
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NO
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Check for length and width
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Bars are annealed to achieve high tensile strength ≥ 1200 MPa
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Re-size if too large
Diameter >.381in
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NO
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YES
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Materials mixed and red pigment added
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Re-cut if too long
Length > 5.51in
or to wide
Width > 0.043in
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Bar is heat-treated for hardness and the blade tip is textured
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YES
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Bars are cold pressed to be straightened and form the blade tip. Bar is cut to Length: 5.5in
Width of Blade Tip: 0.04in
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Send back for re-test
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Extruded into small pellets
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Pellets are collected and put into another extruded and made into bars
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Bar is nickel plated
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Check for magnetization
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NO
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Re-magnetize bar
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YES
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Bars are cut into shape
Length:3.5in
Diameter:0.75
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Check for sizes
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YES
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Hydraulic press is used to press Steel bar into handle
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YES
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Screwdriver is packaged and shipped for retail
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Refine the and address the issues regarding the failure
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NO
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YES
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NO
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Hole is cut into handle for the steel bar
Diameter:0.38in
Depth: 2.50in
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Scrap if too large
Diameter< 0.381in
or too deep
Depth> 2.52in
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NO
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Re cut if too small
Diameter< 0.379in
or too shallow
Depth< 2.49in
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Quality Assessment
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NO
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Asses the problem
Scrap if Irreparable
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Short Straight Screwdirver
