Burr Problem in a Fine Blanked Part

Better quality (higher carbon) steel and heat treat?
Not my field really as I'm a Cat.
Del

Not my field either, but I agree with del Gatto; also improved tolerancing/polishing of the mating gear and a better lubricant.

If you simply want to remove the burrs, you could try any number of deburring processes, like abrasive blasting, chemical deburring, or rotary deburring. I can see where broaching may not be feasible for a single part, but what if you were able to stack and fixture, say 5 or 6 at a time and broach them? Alternatively to broaching, you may consider wire-EDM or water-jet cutting. Any way you go, throughput will suffer.

You may ask your supplier to look into the clearances between the blanking punch and die, what tool steel they use, heat treat, and wear-coating of the tooling.

Very nice, Milo.

If anyone visits the site, have a look at the Photo Gallery for a series of 'Before and After' shots of varied small parts. Very cool business.

I don't want to look like I'm shining your apple. It looks to me a good solution for the original poster, but I will wait for him to tell us he thinks so as well before I give you that GA. ^{_{I should just do it now I know this is a good answer...}}

This company is a leader in the field of deburring. I have seen them solve some amazing problems. The reason that I had nothing else to say is the burr is a problem withthe fineblanking operation at their suppliers, and the cost to make new dies I expect will be quite prohibitive.

Thanks.

Milo

Not waiting. GA now, Ky.

Thanks for the enlightening information.

Limitation could be the effect of high intensity heat even for a nano second on long term life of some critically stressed components.

I don't see why this is considered a 'good answer'. The company does provide a unique way of getting rid of burrs -- but I thought the question was asking how to prevent the burrs from forming in the first place. Once the part is installed into a final assembly it may not be possible to place the finished unit into an explosive atmosphere. And, unless the underlying cause that creates the burrs is addressed, more burrs would occur.

Vibratory deburring and finishing using ceramic media is about one of the appropriate and relatively inexpensive technique for your application. The technique is widely used to deburr and polish finally finished highly stressed gears of aviation transmission applications.

Fineblanked parts always have a burr, located on the opposite side to the die roll. The size of the burr tends to increase with the number of parts produced, reflecting the gradual wear on the tool. Therefore, the tools should be reground at regular intervals. Thermal deburring is very effective only when the burr size is very very small. It is better to control the burr size. If this is taken care of , then even belt grinding or tumbling will do.Hence, please ask your supplier to check the tool wear. Rangasamy

Do not remove the burrs in soft condition. Heat treat the parts with burr and remove the burr by belt linishing machine & vibropolished or abrasive blasting.