Roll Thread Machines

[Gorpomon]

Hi,

Where can I find information on optimizing roll threading machines, specifically I'm looking for guidance on:

1. How to figure out what contact pressure the machines should be set to (I assume depending on material and size).

2. Any existing designs of gages that can be used to decrease setup time. I notice our workers take about 10 minutes each job doing fine adjustments, I'm sure some gages could be made to speed that up, does anyone know of some existing designs?

I'm checking roll threading company websites but they aren't too much help, also I don't want to involve roll thread manufacturers or gauge designers as the budget to work with these on these two issues is very minimal. Any resources or reference books someone knows about? Please feel free to make any suggestions.

My machine is an old Tesker roll threader. It looks to be an old version of the model 200 machine, it does not have computer display and some of the gauges are in a different position than the new Model 200 version.

Thanks for the help
-Ron

 

[TVP]

Ron,

There is very little technical information available in the public domain about thread rolling specifics like this. The people who have this kind of information either work for the equipment manufacturers (Tesker, Kinefac, Profiroll, etc.) or work for your competitors (fastener manufacturers, machine shops, etc.). If it were me, I would at least make 1 phone call to Tesker to discuss your situation. For what it's worth, the best reference I have seen on thread rolling is the book chapter that Harold Greis from Kinefac wrote in the following book:

https://www.mhprofessional.com/product.php?cat=108&isbn=0071398252

However, it will only have a little coverage on question 1, and nothing on #2.

 

[Gorpomon]

Thanks for your reply, I contacted a person from Tesker and got a product manual for a model 200. Even my contact there was unaware of any gages for thread rolling machines, however I was assured my setup times (upwards of 30 minutes) were quite good actually. Though I did get an answer on determining rolling pressure, basically 5000lbs above minimum pressure. That minimum pressure being the amount that starts making parts with oversized pitch diameters or undersized outside diameters.