Carbide Braze Failure Due to Poor Machining of the Steel Holder 1

[tomwalz]

I rarely see braze failure for this cause. It is even more rare to see something this extreme.

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Thomas J. Walz
Carbide Processors, Inc.

http://www.carbideprocessors.com

Good engineering starts with a Grainger Catalog.

 

[MikeHalloran]

The cutter marks suggest that the milling machine's spindle was seriously out of square with the slide, so there's no way the milled surface could have resembled a plane at any scale.



Mike Halloran
Pembroke Pines, FL, USA

 

[tomwalz]

Dear MikeHalloran:

Thank you for the comment.

sincerely,


Tom Walz

Thomas J. Walz
Carbide Processors, Inc.

http://www.carbideprocessors.com

Good engineering starts with a Grainger Catalog.

 

[dhengr]

Tom:
The tool marks could also be due to poor cutting tool selection and too fast a feed speed or too slow a spindle speed in the milling process. All in all, it’s a really poor machining job. You can not have the carbide tool piece rocking on a high spot on the steel holder piece, as the one picture shows. It must be reasonably well and continuously bedded on the holding steel. Otherwise the brazing should flow to fill minor variations in the surface of a good machining job.