Thanks Paul. Not too sure if this picture shows it clearly enough. I've used 25mm rounded edge box steel to make this nest of tables. For the design I opted for one type of join but did consider mitred corners. I found to smooth the weld the flap disc had to be in the area shown by the polished area and couldn't have been a smaller area. The top of the join wasn't welded because the table top needed to be flush. I appreciate your comments and would be grateful of any more.I would have mitred the joint, then the radiused corners of both pieces would meet and need no shaping, you need to work on your grinder technique, finishing a joint can be as much of an art as welding it.
This is a stainless one but you'll get the general idea
https://www.mig-welding.co.uk/forum/threads/finishing-a-mitred-joint.27837/
Thanks Richard. The weld's on rounded 25mm box steel so there's still penetration in the rounded area even when the area is polished flat. How can I get a better weld on the inside corner? ThanksSteve’s right.
You’ve ground that to the point the joint has no weld metal left so lacking fusion big time.
View attachment 164603
I can also see the big lumpy slug you’ve put underneath will also be lacking fusion too. Those welds probably ain’t doing much.
They are nice neat tables but why have you left those corners like that. You’ve got linishing marks in the corners on the steel work but it looks like you’ve left them like that as your finish??Thanks Paul. Not too sure if this picture shows it clearly enough. I've used 25mm rounded edge box steel to make this nest of tables. For the design I opted for one type of join but did consider mitred corners. I found to smooth the weld the flap disc had to be in the area shown by the polished area and couldn't have been a smaller area. The top of the join wasn't welded because the table top needed to be flush. I appreciate your comments and would be grateful of any more.View attachment 164604 View attachment 164605 View attachment 164606
Thanks Steve. The hairline is where the rounded box steel starts to curve and meet the weld. If the flap disc goes into the weld a hairline is visible. If the flap disc polishes away from the weld there's no hairline visible.From the photo it looks like the joint line is showing, suggesting you have not had penetration and have removed just about all the weld you have laid down.
Thanks Ashley. I've used the same settings on my welder for a bead wide enough to fill the valley of the curve on the box steel as the inside corners. I'll reduce the wire feed rate on the inside corners. I appreciate your help.Looks like you've got too much wire going into the joint or not hot enough
How did the other welds look before you grinded them back?
Thanks Henry. I used the same settings on my welder for a bead wide enough to fill the valley of the curve on the box steel as the inside corners. I'll reduce the wire feed rate on the inside corners. Cheers for your advice.That corner filet (the one with the big slug) has to be done with the welder setup correctly for that joint, also the travel speed needs to be right. Easier said than done. You need to experiment with the settings on your welder to get the volts, wire feed speed, and you travel speed right so that you are left with a smooth miter weld with well blended toes. I have some pics on this forum of what I an talking about, but can't remember where they are.
Oh forgot, in answer to your question there are fillet grinders from 'Metabo' is one that are specifically used in the S/S fabrication area where finish is very important. They are used to grind these exact fillets prior to polishing. Now to remove that amount of weld will take some time so it is better to get the welding as best as possible to limit the post work.
Thanks Richard. The design brief was for industrial tables so the polishing was left to add character. The finish wasn't to be perfect and the steel was to be left in its natural state. I'm having some work in the future powder coated with funky bright colours - is easy enough to learn or best to outsource?They are nice neat tables but why have you left those corners like that. You’ve got linishing marks in the corners on the steel work but it looks like you’ve left them like that as your finish??
Personally I’d of mitred all those corners. There is something that really grinds on me about open ends on box. Then I’d of spent time buffing out the scratches associated with linishing. Then personally I’d of painted or powder coated the steel work black. I love the tables I love the design but the way the steel work is presented spoils them for me.