phenomenon: Riveting points are not uniform, and there […]
phenomenon:
Riveting points are not uniform, and there are dents
the reason:
The riveting cavity is too large or the rivet is too small
Solution:
Reduce welding head riveting size or increase rivet height or diameter
Phenomenon: There is excess flash around the riveting point
the reason:
1. The riveting cavity is too small or the rivet is too large
2. Rivet and welding head riveting cavity center is not accurate
Solution:
Decrease pressure or increase amplitude
Adjust the throttle valve to slow down the descent speed of the welding head
phenomenon:
The apex of the rivet is not yet formed and the bottom of the rivet has begun to melt and collapse
the reason:
1. Too much pressure or too small amplitude
2. The welding head descends too fast
Solution:
Decrease pressure or increase amplitude
Adjust the throttle valve to slow down the descent speed of the welding head
phenomenon:
Surface damage occurs on one side of the bottom of the rivet
the reason:
1. Improper die support
2. Too much stress
Solution:
Try metal materials as the support of the lower die
Reduce the pressure and add a metal sheet between the rivet and the base for heat dissipation to reduce damage
phenomenon:
After riveting, the workpiece is loose
the reason:
1. The melted rivet is not completely solidified before the pressure is removed
2. Not riveted
Solution:
Extend the holding time or use a clamp to clamp
1. Adjust the stroke 2. Extend the welding time
phenomenon:
When riveting, the root of the rivet is broken
the reason:
1. The unreasonable transition between the rivet and the base makes the stress too concentrated
2. The welding head and the rivet are not at right angles
Solution:
Improve the transition structure of rivets
Check alignment
phenomenon:
The plastic workpiece slides when riveting
the reason:
Not clamped
Solution:
Improve the lower mold and improve the clamping effect