Solving Assembly Challenges in Reduced Footprint Applications

Solving Assembly Challenges in Reduced Footprint Applications

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Before We Start

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Moderator

Leslie Langnau Design World

Presenter

Jay McKenna Penn Engineering

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PennEngineering

microPEM™ Fastener Technology

Presented by Jay McKenna

Global Product Mgr – New and Micro Products

Solving Assembly Challenges in Reduced Footprint Applications

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Who is PennEngineering? • Penn Engineering & Manufacturing Corp. (PEM)

founded in 1942 in Doylestown, Pennsylvania, USA is the global leader in the design and manufacture of thin sheet fastening devices and installation systems.

• PEM is the inventor and continues to be the sole manufacturer of genuine PEM® brand fasteners.

• We currently have regional manufacturing and technical centers in two U.S. locations, Ireland and China.

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PENNENGINEERING FASTENER

INSTALLATION METHODS

• Self-Clinching

• Broaching

• Surface mount

• Weld

• Flaring

• Swaging

• Inserts for plastics

• Blind threaded rivet

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PENNENGINEERING Technical Services

• On-Site training.

• Comprehensive website includes complete fastener 3D modeling capabilities.

• Trained field technical representatives

• Global testing laboratories.

• Cost Savings Investigations (C.S.I.).

• Prototype development.

• Installation solutions.

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What is the “micro” in microPEM?

• Threads as small as M1.

• Pin diameters as small as 1mm.

• Standoff lengths as short as .040”/1mm.

• Attach sheets as thin as .003”/0.08mm.

• Clinching into sheets as thin as .012”/0.3mm.

Smaller products are in development.

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Why so small?

We actively conduct Product Teardowns and CSI

reviews for our customers. We have found in our analysis and

investigations that they often need smaller and smaller clinch

fasteners for thinner and thinner panels, to replace the

adhesives, rivets or welds they have been using. This is driving

us to provide more assembly options for when they are

designing their next product.

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Micro Fasteners Overview

A new family of solutions from PennEngineering

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MPP - Micro Pin • Satisfies micro positioning and

alignment requirements with pin diameters as small as 1.0mm.

• Flush installation into materials as thin as .020” / 0.5mm and as hard as HRB 92 / HB 195, such as stainless steel.

• Made from A286 - excellent corrosion resistance.

• Chamfered end eases mating hole alignment.

• RoHS compliant.

MPP

MPP – Application Example

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Phone: Pin used as a spring anchor.

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400,000 per day, replacing weld pins

MPP – Application Example

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MSO4™ - Self-clinching Micro Standoffs

• Thread sizes: M1.0, M1.2, M1.4, M1.6, #0-80, #2-56

• Made from 400 Series Stainless Steel

• Installs into materials with a maximum hardness of HRb 88 and as thin as 0.4mm / .016”

(0.3mm / .012” possible with modification)

• Lengths as short as 1mm or .04”

• Round, knurled head for close centerline to edge placement.

• RoHS compliant

MSO4

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Phone: Standoffs clinched into 0.4mm/.016” stainless.

MSO4 – Application Example

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Cell phone: M1.4 Standoff clinched into 0.43mm/.017” stainless.

MSO4 – Application Example

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Cell phone: M1.4 Standoff welded onto 0.4mm/.016” stainless.

MSO4 – Application Example

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Laptop: M2 standoffs clinched into 0.5mm/.020” stainless

heatsink mounting plate.

MSO4 – Application Example

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Camera: M1.6 standoffs flared into 0.2mm/.008” stainless

heatsink mounting plate.

MSOFA – Flaring Standoff – Application Example

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Micro SMTSO

SMTSO

• Surface mounted to PCB.

• Thread sizes down to M1.

• Material choices: Brass,

Steel

• Bright or Matte Tin plated

• Sold Loose or Tape-And-Reel

• Hex body for additional

strength.

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SMTSO – Application Example

Laptop: M2 SMT nuts 1mm tall on PCB

2.5mm ID spacer

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SI® Brand Micro Inserts for Plastics

Inserts for Plastic

• Thread Sizes from M1.0

• Material choices: Brass,

Stainless Steel

• Style Choices: Ultrasonic,

Heat-Stake, Molded-In,

Press-In

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Do you use micro screws?

1. Yes – only to hold an assembly together.

2. Yes – to allow for disassembly and reassembly.

There are now two new engineered solutions.

Micro TackPin

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Yes – to hold an assembly together. Solution = Micro TackPin

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Micro TackPin

• Intended for attaching two surfaces together, much the way a screw would. The part clinches into the bottom member while retaining the top member with a head.

• Tapered tip assists in assembly into the very small mounting hole.

• Interference band sizes hole during assembly to alleviate tolerance concerns.

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Micro TackPin

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Micro TackPin

Value = Significant Cost Reduction

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Micro TackPin – Application Example

Over 250 million screw replacements this year for this project

Over 150 million more for two other projects

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Micro TackPin – Application Example

PCB to copper busbar

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• What is the benefit to use a PEM® TackPin instead of a screw?

o The PEM® TackPin is stronger in pullout than the thread strength of a

screw of the same length.

o No risk of cross-threading.

o Less weight than a screw.

o Smaller than a screw, so designs can be thinner/smaller.

o No need for the cost of a nylon locking patch.

Micro TackPin

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Micro TackPin

• What is the process cost savings?

o Simplified assembly - press-in versus turned screw.

o Throughput is faster.

o No need to control torque settings to drive screws.

o No scrap costs due to cross-threading, over installation, or screw breakage during assembly.

o If adhesives are used, a PEM® TackPin can be used without any recycling concerns that adhesives can cause.

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Micro TackPin

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Do you use micro screws?

1. Yes – only to hold an assembly together.

2. Yes – to allow for disassembly and reassembly.

There are now two new engineered solutions.

Mortorq® Super Screw

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Yes – to allow for disassembly and reassembly.

Solution = licensed MTS® Screw

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Mortorq® Super Screw

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Mortorq® Super Screw

54% reduction

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Mortorq® Super Screw

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Mortorq® Super Screw

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Mortorq® Super Screw

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PennEngineering

microPEM™ Fastener Technology

Solving Assembly Challenges in Reduced Footprint Applications

Questions?

Design World Leslie Langnau llangnau@wtwhmedia.com Phone: 440.234.4531 Twitter: @DW_RapidMfg

Penn Engineering Jay McKenna JMcKenna@pemnet.com Phone: 215-766-8853 x1229 LinkedIn: linkedin.com/in/jaymckenna

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