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Progressive Stamping & Wire Forming of Steel Spring Loaded Bracket Assembly for the Automotive Industry

Progressive Stamping & Wire Forming of Steel Spring Loaded Bracket AssemblyWorking with a client in the automotive industry, Perfection Spring & Stamping Corp. developed a cost-effective solution to a problem with an existing trunk striker plate on a truck. The hinge system was experiencing unanticipated failures, so we used our progressive stamping, fourslide wire forming, and spring coiling capabilities to produce a better product using the original basic design. The essential mechanism on the new piece was a spring loaded pop-up striker plate, with a variable rate spring.

This compression spring was coiled from .075" thick music wire, to a length of 1.80". The base plate measured 5.5" x 3.0" x 3.0", and the wire form measured 7.0" in length. By using the original tooling, we were able to save our customer additional costs, over and above the cost savings of the new, more efficient part. The production run of 325,000 pieces was specially packaged on custom trays, and delivered to our customer in two locations: Michigan and Missouri for immediate integration with their automotive assembly operations.


Progressive Die Stamping Project Highlights

Product Description This Steel Spring Loaded Pop-Up Striker Plate is used within an automotive trunk application
Capabilities Applied/Processes
  • Solve an Unanticipated Failure of Customer's Hinge System
Progressive Stamping
Fourslide Wire Forming
Spring Coiling
Equipment Used to Manufacture Part
Minster Press
  • 300 Ton
Itaya CNC Forming Machine
Baird Fourslide 4-30
  • Progressive Die
  • Fourslide Tooling
  • Coiling Tooling
Overall Part Dimensions
Base Plate:
Material Thickness: .085"
Length: 5.5"
Width: 3.0"
Height: 3.0"
Wire Form:
Material Thickness: .250"
Length: 7.0"
Compression Spring:
Material Thickness: .075"
Length: 1.80"
Width: .80"
Tightest Tolerances ±.001"
Material Used
Base Plate: Cold Rolled Steel
Wire Form: Hard Drawn Wire
Compression Spring: Music Wire
Material Finish Black E-Coat (Electrodeposited Semi-Gloss Black Epoxy Paint)
Estimated Part Weight .75 lbs
Features/Benefits Innovative Spring Loaded Pop-up Striker Plate
  • w/ Various Rate Spring
In Process Testing/Inspection Performed
In-Process Real-time SPC of Critical Dimensions
CMM Measurement
3x Life Cycle Testing
Strength Testing on Stakes
Dimensional Results Reporting
Control Plan
Process Flow Diagram
Failure Mode and Effect Analysis (FMEA)
Gage Repeatability
Reproducibility Variable Data Report
Raw Material Chemical Composition Results
MSDS-Material Safety & Data Report/Substances and Materials
Industry for Use Automotive
Volume 325,000 Pieces
Packaging Special Pack on Custom Trays
Packaged Within Environmentally Friendly Recyclable Containers
Lead Time Tooling: 18 Weeks
Production Parts: 5 Weeks
Delivery Location Michigan
Standards Met Customer supplied print, 2D CAD Drawing
Product Name Spring Loaded Pop-Up Striker Plate for Car Trunk

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