Author Topic: Early Sandcast Found...... (Read 90175 times)

Terry in Australia · « **Reply #300 on:** April 25, 2021, 01:40:10 pm »

Yep, I think Honda must have hired new welders due to the surge in CB750 sales, as some of the welds on my K0 and my 1970 K1 frame are worse than my crappy welds, and I’m half blind!

754 · « **Reply #301 on:** April 25, 2021, 07:54:16 pm »

I am pretty sure Honda used robot welders , a lot longer than people would think.. way before they were in common use.,

Terry in Australia · « **Reply #302 on:** April 25, 2021, 09:53:35 pm »

They must have been sh1t robots if I can weld better than them!

Don R · « **Reply #303 on:** April 25, 2021, 10:15:28 pm »

I'd be willing to bet they used war surplus welding machines with whoever would try.

PeWe · « **Reply #304 on:** April 26, 2021, 03:10:52 am »

Robots welds equally each time. If the weld process is wrongly set, it will be bad each time

Correct weld current and different setups depending on the gun with wire angle relative the path with correct speed.
The first electrical robot was produced 1973.

They might have had pneumatical simple things.

Tralfa in Norway started 1969 with their paint robots.

BenelliSEI · « **Reply #305 on:** April 26, 2021, 09:03:05 am »

I suspect these early bikes were welded up by two guys, one on each side. The welds on one side are much nicer than the other!

754 · « **Reply #306 on:** April 26, 2021, 10:29:45 am »

Some of you missed the point..
Early 750 definitely hand welded, but the process and look improved shortly after..
Robot use on car bodies came in later 70,s at Honda, but not fully wekding them till into the eighties.
My main point is welds on a 69 are way different in appearance , than welds from 72 or later..

That is not to say, that individual assemblies were not welded by robot earlier.., the centerstand , is a piece that could easily be machine welded vs say a frame. I ran a robot welder a short while., interesting.. my brother used to orogram them..

PeWe · « **Reply #307 on:** April 26, 2021, 12:28:53 pm »

Car bodies mostly spot welding.
The stand must be arc welded as used on frames, exhaust pipes and similar. Probably MIG/MAG with (active gas CO2 causing more spatter) as often used in Asia.

I have also programmed industrial robots, mostly material handlers. Fun.

The car body shops with hundreds of robots are technically really amazing, how everything is working and controlled by PLCs. Really high tech today.

Terry in Australia · « **Reply #308 on:** April 26, 2021, 01:23:41 pm »

Yeah, I doubt that the early frames were welded by any robot, look like crappy MIG welds to me, that’s not to say MIG welding is crappy, modern robot welding is all MIG, I just think that Honda were in such a hurry to get their bikes out the door, they didn’t care too much about how their welds looked. Ducati still use MIG welds on their steel trellis frames, and they’re beautiful. I now own a couple of TIG welders, so I really must teach myself how to use them.

PeWe · « **Reply #309 on:** April 27, 2021, 03:20:18 am »

The arc welding power sources have developed a lot the last 30 years.
Check Miller, Fronius and Esab as a few examples.

Don R · « **Reply #310 on:** April 27, 2021, 07:45:39 pm »

True, I think one of the new pulse tig/migs could make a good welder out of me, even after years of welding for a living. I have a miller synchrowave 250 tig and a 110V Hobart mig. I sold my Lincoln Invertek power supply with separate wire feeder, more than I needed and took up a lot of space.

BenelliSEI · « **Reply #311 on:** April 29, 2021, 09:07:18 pm »

Lockdown issue..... how to get two fenders, two rims and instrument backing plates chromed? Going to send them off and get the process started. Found a well respected shop, a few hundred miles away. Can’t seem to get there, so trusting the Post Office. Yikes!

Terry in Australia · « **Reply #312 on:** April 29, 2021, 09:51:55 pm »

Quote from: BenelliSEI on April 29, 2021, 09:07:18 pm

Lockdown issue..... how to get two fenders, two rims and instrument backing plates chromed? Going to send them off and get the process started. Found a well respected shop, a few hundred miles away. Can’t seem to get there, so trusting the Post Office. Yikes!

Is that another "BOAT" thing John? (Break Out Another Thousand) I better go look at my HM341 pipes to see what I need from you, so I can help soften the blow.

BenelliSEI · « **Reply #313 on:** April 30, 2021, 05:08:48 am »

Quote from: Terry in Australia on April 29, 2021, 09:51:55 pm

Quote from: BenelliSEI on April 29, 2021, 09:07:18 pm
Lockdown issue..... how to get two fenders, two rims and instrument backing plates chromed? Going to send them off and get the process started. Found a well respected shop, a few hundred miles away. Can’t seem to get there, so trusting the Post Office. Yikes!

Is that another "BOAT" thing John? (Break Out Another Thousand) I better go look at my HM341 pipes to see what I need from you, so I can help soften the blow.

Terry...... wish I could laugh (that is funny)! Probably more like 2 X BOAT!

BenelliSEI · « **Reply #314 on:** April 30, 2021, 09:18:34 am »

Definitely NOT going to work on this project, through this riding season. But, determined to keep stuff moving around and collecting what I need for next winter. Finish the Chopper and then RIDE my bikes.

Terry in Australia · « **Reply #315 on:** April 30, 2021, 04:52:23 pm »

While we don't have riding seasons here in Oz John, winter for me is probably my busiest building time. Working from home 2 days a week has been a real bonus, and 5 days a week for a year during all our lockdowns was bike building heaven. I do love to ride whenever I have any time off (ridding 200 miles to my Ma's house on my K2 today, then 200 miles back tomorrow morning) but I like to sometimes kill a few spare hours before or after a ride tinkering too.

I painted my K1 frame on an unusually warm day a couple of weeks ago and if I wasn't doing a 400 miler this weekend I'd be painting the top case and cylinder block on the Horrible K2 engine to get it out of the way before my F2 970 build. I've now spent a fortune on Suzuki T350 rebel parts to turn that rusty turd back into a neat little bike, and the engine's top end, pipes, wiring, handebars and fenders will be arriving shortly, so I can now get the frame (the only good part of the bike I paid way too much for) blasted and hit it up with a can or two of Rustoleum.

I suppose what I'm saying, in a roundabout way, is that it's good to have a mix of riding and wrenching, regardless of weather. Riding is fun, wrenching is good for the brain.

Prospect · « **Reply #316 on:** April 30, 2021, 06:42:36 pm »

Not to highjack the thread but what is the non riding winter temperature down there?

Quote from: Terry in Australia on April 30, 2021, 04:52:23 pm

While we don't have riding seasons here in Oz

Don R · « **Reply #317 on:** April 30, 2021, 06:43:13 pm »

I ended up with a rust bucket T350 myself a few years ago. If I had storage space I'd have kept it but it got parted out to a guy in Minnesota. The engine was half full of water, no title, it came along with a 750A in similar shape delivered for $50.

Terry in Australia · « **Reply #318 on:** April 30, 2021, 07:24:59 pm »

Quote from: Prospect on April 30, 2021, 06:42:36 pm

Not to highjack the thread but what is the non riding winter temperature down there?

Quote from: Terry in Australia on April 30, 2021, 04:52:23 pm
While we don't have riding seasons here in Oz

The cold doesn't bother me, and apart from Tasmania I live in the coldest state, it's just rain. While I don't mind a bit of rain, if it's bucketing down I leave the bikes inside, most of my favourite roads have lots of sharp bends, and so that's when I find something else to do.

Terry in Australia · « **Reply #319 on:** April 30, 2021, 07:28:38 pm »

Quote from: Don R on April 30, 2021, 06:43:13 pm

I ended up with a rust bucket T350 myself a few years ago. If I had storage space I'd have kept it but it got parted out to a guy in Minnesota. The engine was half full of water, no title, it came along with a 750A in similar shape delivered for $50.

The guy in Minnesota wasn't a guy called Keith was it Don? I've been buying all my T350 stuff from him for the last few weeks and he specialises in old 2 strokes. Great guy, if it wasn't for the shipping doubling the price on everything I bought, I would have bought a complete bike from him. As it was, I bought everything but the bare frame, wheels and seat.

BenelliSEI · « **Reply #320 on:** April 30, 2021, 07:30:38 pm »

I suppose what I'm saying, in a roundabout way, is that it's good to have a mix of riding and wrenching, regardless of weather. Riding is fun, wrenching is good for the brain. (Quote from Terry).

Truthfully, I spend way more time in the shop than on my bikes. I do enjoy the wrenching a lot too! With the commitment to the Endurance Racing Championship (our first race is at Mosport in three weeks), I’ll be spending more time on the race cars than the bikes this summer. I do want to get some riding in too. Today was my 68th b’day, so get on with it!

Terry in Australia · « **Reply #321 on:** April 30, 2021, 07:33:51 pm »

Happy Birthday John! I forgot about the car racing gig, yep, that's a big commitment too. Are you still working, or comfortably retired? I've got 4 more years before every day is a bike riding/wrenching day.

RAFster122s · « **Reply #322 on:** April 30, 2021, 07:58:49 pm »

Happy Birthday John 🎂🎉🎂🎉

Prospect · « **Reply #323 on:** May 01, 2021, 05:51:52 am »

Happy Birthday John!

BenelliSEI · « **Reply #324 on:** May 01, 2021, 06:24:32 am »

Unemployed and retired for the past 8 years. May have to return to work when I’m 90, but for now, “living the dream”. Thanks, All.

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Author Topic: Early Sandcast Found...... (Read 90175 times)