Newbie Needs Help
Newbie Needs Help
(OP)
This is my first time posting and hoping to get some insight,
This is in regards to cutting 4140 material with an automatic circular cut off cold saw using a cermet tipped sawblade.
The cermet tipped blade developed chipping near the corners at standard parameters run. They normally get 10,000 pcs but two blades only produced 600 and 900 cuts per blade due to a failure mode(burr on cut surface). It was 20 degrees below 0 for a few weeks. These bars were coming straight from the outside into the building through a small wall. They were very frozen. Bars were 4'' round.
Initially I would say it must be something else and not temp. but I could be wrong.
This is in regards to cutting 4140 material with an automatic circular cut off cold saw using a cermet tipped sawblade.
The cermet tipped blade developed chipping near the corners at standard parameters run. They normally get 10,000 pcs but two blades only produced 600 and 900 cuts per blade due to a failure mode(burr on cut surface). It was 20 degrees below 0 for a few weeks. These bars were coming straight from the outside into the building through a small wall. They were very frozen. Bars were 4'' round.
Initially I would say it must be something else and not temp. but I could be wrong.





RE: Newbie Needs Help
With what you have written, I have to wonder that if you brought the bars in through a large wall, would that help? If not, why are you telling us the size of the wall?
rp
RE: Newbie Needs Help
The temperature of the bars will certainly affect the durability of the saw blade, but I would not necessarily say that it explains a difference on the order of 10x (10,000 cuts vs. 1,000 cuts). The material will be about 10% stronger/harder at that temperature compared to normal ambient/room temperature. Have you contacted your consumable supplier to get their feedback?
RE: Newbie Needs Help
RE: Newbie Needs Help
With the huge jumps in the price of tungsten and other raw materials many tool manufacturers are looking at new suppliers.
The substitutes are not always 100% successful.
Thomas J. Walz
Carbide Processors, Inc.
www.carbideprocessors.com
Good engineering starts with a Grainger Catalog.
RE: Newbie Needs Help
Like trying to chainsaw a tree limb from the underside.
I'd give that theory a 4/10 maybe, but doesn't hurt to consider it.
RE: Newbie Needs Help
This theory does happen!
thanks,
RE: Newbie Needs Help