HB-4 PennEngineering • www.pemnet.com roadly defined, a self-clinching fastener is any device, usually threaded, that when pressed into ductile metal, displaces the host material around the mounting hole, causing it to cold flow into a specially designed annular recess in the shank or pilot of the fastener.
Contents
- 1 How do you use a PEM nut?
- 2 What is PEM nut?
- 3 Why PEM nuts are used?
- 4 How do you install a self-clinching nut?
- 5 How do you install broaching nuts?
- 6 What does PEM stand for in PEM nuts?
- 7 What is PEM in mechanical engineering?
- 8 What is PEM in sheet metal?
- 9 What is a self-clinching stud?
- 10 What does torque-out mean?
- 11 What is a clinch joint?
How do you use a PEM nut?
PEM® Brand Fasteners Installation Demo
- Prepare properly sized mounting hole in sheet.
- Place shank of nut into mounting hole, preferably the punch side.
- With punch and anvil surfaces parallel, apply squeezing force until the head of the nut comes into contact with the sheet material.
What is PEM nut?
PEM® Self-Clinching Nuts and Studs for Use in High-Strength Thin Steel Sheets Provide Permanent Threads for Automotive Component Attachment Applications. PEM SH nuts are engineered to install into high-strength steel sheets at 975MPa maximum ultimate tensile and as hard as HRC 30 or less on the Rockwell “C” scale.
Why PEM nuts are used?
PEM® brand fasteners utilize self-clinching, broaching, flaring, surface mount, or weld technology to provide strong, reusable, and permanent threads and mounting points in thin sheet metal, P.C. board materials, and other ductile or non-ductile thin material.
How do you install a self-clinching nut?
Installation is neat and easy, simply locate the fastener into a pre-prepared (punched or drilled and reamed) hole and apply a parallel squeezing force to embed the fastener into the panel. Self-Clinching fasteners work by utilizing a special clinch feature.
How do you install broaching nuts?
Installation is simple, prepare the specified hole and using a flat punch and appropriate anvil, apply a parallel squeezing force to press the part into the hole. When installing in printed circuit board, broaching nuts are suitable for use in non- plated holes only.
What does PEM stand for in PEM nuts?
Power Entry Module. PEM nut or self-clinching nut.
What is PEM in mechanical engineering?
The group Photons for Engineering and Manufacturing (PEM), formerly known as MSS (Materials Science and Simulations), performs research on structural and mechanical properties of metals and alloys with the aim to contribute to advanced manufacturing.
What is PEM in sheet metal?
If you’re in the fabrication of sheet metal, you have probably heard the term “PEM® fastener”. PEM® brand fasteners, designed and manufactured by PennEngineering, utilize self-clinching technology for attaching to thin sheet metal.
What is a self-clinching stud?
Self-Clinching studs are pressed into a hole in a sheet to be installed, this embeds the head of the stud creating a secure lock into the sheet with high torqure-out and pushout resistances.
What does torque-out mean?
Torque-out reflects the torsional holding power of a fastener’s clinch feature, or the amount of torque necessary to spin the fastener out of the host metal sheet. This test often is made at the head of the fastener with values usually exceeding the ultimate torsional strength of a mating screw or nut.
What is a clinch joint?
Clinching describes the forming of a Clinchlok joint. A Clinchlok joint is formed when the upper tooling squeezes the two ply of material joined between a punch and die. This rounded edge is known as the punch tip radius. To form a Clinchlok joint, neither the punch or die can be sharpened.
