Flatness and Pull-out Force Control Specification For Medical Electronic Precision Clinch Fasteners, Based On GB/T 17880

Flatness and Pull-out Force Control Specification For Medical Electronic Precision Clinch Fasteners, Based On GB/T 17880

Medical endoscopic devices use ultra-thin 0.6~1.2mm sheet metal matched with M1.6~M3 clinch nuts and studs. Improper pressing causes bulging, loose clinching and insufficient pull-out force, which fails strict medical appearance and strength standards. This article sets standardized pressing parameters per GB/T 17880 for dust-free medical workshops.

1. Matching Parameters Of Sheet Thickness And Clinch Parts

2. Differentiated Forming Craft For Two Clinch Materials

1. SUS316L non-magnetic medical clinch parts: Low static pressure forming, high-speed impact pressing forbidden to avoid magnetization; 2. Nickel-plated carbon steel clinch parts: Two-stage gradual pressing to prevent coating cracking and peeling.

3. On-site Rectification For Clinching Defects

1. Slight panel bulging: Secondary cold leveling with reduced pressure to prevent sheet tearing; 2. Low pull-out force: Switch to deeper tooth clinch parts or thicker base metal; 3. Coating crack: Adopt two-step slow pressing plus final passivation sealing process.