Tool steel repair

[Jptiger]

Hey all I've got a trim tool punch with a piece broken out. Not sure if I should fill the whole way with tool steel filler. Maybe a few layers with super missile and then finish with A2. Any thoughts??

[SidecarFlip]

Whatever you use, you'll change the crystallne structure of the parent material as you apply weld heat so you'll have to normalize the part and re-harden. If you don't, it will be extremely brittle in the weld area.

That applies no matter what you employ as repair material.

[smithdave467]

Gear Cutting (http://www.splinebroaches.com/) is the process of creating gears . The Most common process of gear cutting includes Broaching, hobbing and Machining.

[smithdave467]

Spline Broaches (http://www.splinebroaches.com/) is an instrument for cutting and sizing. They are usaly made for only one user and for only particular machining operations.

[vicegrip]

Hi guys.........
Both the question and the answer are too general.

My little home away from home is in a trim-die shop.
Punch is damaged not the die?
Trimming what?
What metal is the part to be trimmed?
How thick?
How much crearance?

What broked it?
Hydrolic trim or mechnical? fast or slow?
Will it happen again?
Is the broken (Missing area), by a sharp corner or a dramatic shaped area?

I generally just do a net build-up out of A2 or S7.
Which hardness filler I don't keep in my brain.
A pro I use when a weld is beyond my abillity
will preheat and rarely need any anealing !!
Phil

[Jptiger]

The tool is from foam or plastic container co. it was broken by someone stcking an allen wrench in as the tool actuated. my concern is the edge and it not cooling to fast. I repair cuting edges all the time alot of cast to but the other day I had trouble with a large forming die and i geuss its shaken my confidence a bit. There is a small nick in the di but im not worried about it here isa pic of the tool. thanks

[vicegrip]

Bingo!
Just heat the hole thing up to about 250 degrees.....

And work slow and gentle introducing your heat.
An slowly build the area. From the deeper point up to the rim.
Adding as you go one row at a time.

You'll do fine.
TOO fast is usually the killer.
Got to fly !!
Phil

[Jptiger]

Worked out great! Has to cool a little longer and it will be ready for grinding.
Thanks for the advise guys I really appreciate it.

[vicegrip]

Worked out great! Has to cool a little longer and it will be ready for grinding.
Thanks for the advise guys I really appreciate it.

All's weld that ends weld !;)
vg

[aametalmaster]

I weld broken and miscut stamping dies everyday. Just some preheat and then weld with Crown Alloys AH20 or equiv for air hard steel and peen the heck out of it with a little hammer. I also use Eureka 72 for D-2 steels. Been doing this for the best part of 20 years. Just went back to work in a stamping plant a few months ago and fell right back into welding dies. Some dies take 8 or more hours to weld...Bob