MIS-MATCHED THREADS & BLANK THREADS

MIS-MATCHED THREADS

When operating thread rolling process for machine screw, there is small chance of mis-matched threads will occur; however once it happen, no sorting equipment can detect this problem. One mis-matched threads screw used in automatic assembly line will lead the whole assembly line to shut-down and cause great loss!

FEW FACTS OF MIS-MATCHED THREADS

● Mis-matched threads appear to be vertical on a portion of threads, thus it’s obscure to be detected.
● Optical sorting machine can’t detect the partial abnormal threads.
● Screw with mis-matched threads is not functional in practice.

HOW DOES MIS-MATCHED THREADS OR BLANK THREADS TAKE PLACE?

● When burrs or tiny debris stuck in the middle of thread rolling die, the die surface become slippery .
● Abnormal thread rolling process.
● Other unknown factors.
Above conditions caused the screw rolling move upward or downward on the die and created mis-matched threads or blank threads.

SOLUTIONS

As seen on left-side photo
● The blue area code C,D are thread rolling dies
● Code A is the upper electrical conductive board
● Code B is the lower electrical conductive board
● Code E is the groove
● Red arrow shown where the screw been pushed forward
● Green arrow is where screw been rolled up or down.

During thread rolling process, screws will move forward to the red arrow direction; when previously described conditions occur, screw been pushed upward or downward will touch the conductive boards A or B, the operation will stopped automatically and red light be on, the operator must remove the bad threads screw in order to re-start rolling process.

THE ADVANTAGES

● With our new device installed on rolling machine, there will be 100% Free of Mis-matched threads problem.
● The upper conductive board can control no blank threads occur.

CONCLUSION

● This new device prevents screws from having blank threads or mis-matched threads.
● Also prevent any form of bad threads.
● Your auto-assembly line is assured to run more efficiently, save cost by decreasing machine down time.