Analysis of the causes of broken non-standard screws

Update:22 Sep 2020
Summary:

Non-standard screw heading is prone to bad phenomena an […]

Non-standard screw heading is prone to bad phenomena and cause analysis


a. Double-layered head: Poor molding in one punch.
b. Eccentricity: Poor installation of the second punch and improper adjustment of the machine.
c. Tilted head: Poor installation and improper adjustment of one punch.
d. Crack angle: the punching needle is broken or the second punch is not heavy with the punching die.
e. The head is not round: the selection of a die is improper or the molding is not full enough.
f. Die cracks: The die is broken or the R angle of the die is improper, causing the die to be scratched by the second impact.
g. Burrs: Poor forming in one punch, mainly caused by too large gap between punching rod and die hole or too short punching rod.
h. Cracking of the head: material problems, or the wrong use of a die (such as a die with a hexagonal washer head for the pan head), and the reason for the lubricant.

 

 

 


Tooth rolling is easy to produce bad phenomena and analysis of causes


a. Processing cracks: the tooth plate is worn and improperly adjusted.
b. Blunt tail: improper adjustment of the machine, too old tooth plate.
c. Fire: The distance between the two tooth plates is too large, or the feeding time is wrong.
d. Crooked tail: The control screw on the tooth plate seat is too tight.
e. Tail docking: tooth plate wear and improper adjustment.
f. Asan is not full: improper adjustment of the machine
g. The tail teeth are not rubbed to the tip of the tail.
h. Crooked bar: The correction block is not well corrected.
i. Rough tooth base: The tooth distance is not adjusted properly.