Causes of waste products in the use of blind rivets

In contact, the incorrect form of waste products will be produced due to improper selection of blind rivets or inaccurate calculation method of rivet operation when pulling tools.
The common forms of waste products are: the rivet head is skewed；the rivet head is not smooth；the rivet head is too small； the countersunk hole is not filled；the original rivet head is not in close contact with the workpiece；the work piece entering the station and the rivet rod bends the workpiece in the gap between the holes.
The reasons are as follows:
1. The rivet is too long, the rivet hole is skew, and the blank is not aligned;
 
2. The rivet rod is not long enough;
3. The length of rivet handle is not enough and hammering in inclined direction;
 
4. The diameter of rivet hole is too small and the hole is not chamfered;
 
5. The die is too large, the rivet hole is too large, and the rivet rod diameter is too small;
6.The workpiece is an uneven plate, which can not be pressed and bonded.