Insertion process and equipment

Pierce-nut insertion can often be integrated into the sheet metal stamping line, which allows multiple pierce nuts to be fastened simultaneously as the panel is formed. Pierce nut insertion is a single operation to punch and securely fasten a pierce nut onto a panel. The single operation requires no pre-punching or pre-drilling.

Bulten’s pierce nut process involves a patented solution to fasten nuts to the panel. The head module is powered by nitrogen gas. Varying the gas pressure controls the setting force. The consistent insertion force results in optimal mechanical strength of the assembled components with minimal variation.

Cutting-edge equipment
The stamping equipment included in Bulten’s pierce nut system solution is developed and delivered by Kaller, an acknowledged world leader in press tool applications. Kaller’s unprecedented pierce nut stamping head module is innovatively powered by nitrogen gas, providing considerable advantages over traditional in-die pierce nut insertion systems.

• Large process window, balances variations in sheet metal thickness, nut height and press line capability
• Can tolerate double-nut feeds without sufferin any damage
• Contains integrated sensors to detect no-nut and double-nut feeds
• Controllable setting force during series production without destructive testing
• Fully controllable pierce nut setting force via remotely adjustable nitrogen gas pressure control, block 180° adjustable hose feed simplifies installation and feeding in press tool
  

Bulten’s pierce nut system solution includes the appropriate nut feeding equipment needed to ensure automation and quality control. Bowl feeders and air transport equipment are combined to optimize quality control and minimize energy consumption.