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Fastener Definition
A fastener is a hardware device that mechanically joins or affixes two or more objects together.
Fastener Could be Bolt, Screw, Self Tapping, with Different Heads, Different Lengths, Different Mechanical Properties and different finishes depending upon application.
Fastener Manufacturing
Fastener Manufacturing
Generic Fastener Fabrication Process
Raw Material
Fastener Manufacturing
- Raw Material Grades used are as per ISO 898-part 1/IS 1367 Part 3 for different application
- Raw material for grade 8.8 and above is alloy steel with carbon steel with additives(B, Mn or Cr)
- The Carbon steel used is quenchedfor desired mechanical properties.
- Raw material used is from renowned suppliers like JSL, Sunflag, Mukund.
Raw Material Grades
FASTENER MFG. PROCESS - VARIOUS METHODS
MACHINING
HOT FORGING
COLD FORGING
FORGING
HEADING VS. MACHINING
FEED STOCK
HEADED
- Grain Structure before upsetting
- Grain Structure after upsetting, same as contour of part, strong head
MACHINED
- Grain Structure cut, weak head & dia. Of blank would be equal to head dia.
Cold Forging The various stage of heading a hex cap screw
