Re: [Emc-users] Small spring, very simple flat
Den 2021-01-25 kl. 00:00, skrev dave engvall: Worst case you find a scrap automotive spring. It is probably something like 5160. Torch cut a piece. Anneal, forge, mill, grind, etc to desired shape. Heat until it is not magnetic, quench in oil. Temper back to about Rc 50. Test. The first try may not be good. Adjust as necessary in thickness and temper. That is the long route. Of course you need a friend with a way to grind, shape and harden it. Machinery's Handbook has a pretty good section on springs. Your ruined saw may be your best bet; thin enough to cut with an abrasive disc. Spotted the ruined saw then I cut some wood I should thru away to heat my workshop. If abrasive cutting work it will do the trick for my first prototype fast and cheap. Short route: buy spring steel off web or preformed springs that look about right in dimension. Brownell's lists an assortment of 1075 but also says it out of stock. Brownell's? Only found guns and bullets. Some things are better viewed from the back than the front. This material used as clamps for transistors should be what and ought to be easy come by at least in some parts in the world. Problem is I neither know suitable alloy or reseller. Steel outlet want to sell you a 100 lbs... :-( That's to much, will never use it. Good liuck. Dave ps. There must be better options. Yes maybe. I could make some redesign and buy springs, then it will look more like others do, may be needed for other reasons but otherwise my design should be a rather good choice and this spring thing is more or less the last problem left to solve. Regards Nicklas Karlsson ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Small spring, very simple flat
One way is to use Beryllium copper. If you have a local PCB supplier, they will etch the parts from a .dxf They normally keep stock since the material is used as battery springs. Otherwise, a laser cutter who does saw blades might have material. There's also steel binding strap used in crate packaging. Readily available and quite springy. I use it a lot to keep vice parallels in place. Roland On Mon, 25 Jan 2021 at 00:13, Nicklas SB Karlsson wrote: > Need a small springs, not very many, very simple flat metal. Force in > middle should be around 150N and guess 45mm long, 10mm wide , 0.6mm > thick will do the trick. Anybody have any idea where it is possible to > buy suitable material? > > Have been looking on a used handsaw, probably rather good steel, it hit > a nail anyway and would make many enough to try out it work well but do > not have anything hand to heat it, to hard now and it to be hardened > then cut. > > > Nicklas Karlsson > > > > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Small spring, very simple flat
Old hacksaw blade as a place to start? Should be close in dimention and easy to come by. Might be a bit on the brital side but think you could temper with propane plumbers torch? On January 24, 2021 3:02:56 PM PST, andy pugh wrote: >On Sun, 24 Jan 2021 at 22:13, Nicklas SB Karlsson >wrote: >> >> Need a small springs, not very many, very simple flat metal. Force in >> middle should be around 150N and guess 45mm long, 10mm wide , 0.6mm >> thick will do the trick. Anybody have any idea where it is possible >to >> buy suitable material? > >Maybe flat ground stock? >https://www.engineeringsupplies.co.uk/1mm-x-10mm-x-500mm-metric-gauge-plate.html > >Too thick, but could be surface-ground. > >Depending on the displacement you might not have to harden it. >Hardening doesn't make the material any stiffer, it just means that it >can bend further before the elastic limit is reached, > >0.6mm is thicker than clock springs: >https://www.ebay.co.uk/itm/224266845701 Is thinner and wider an >option? > >High performance spring steel strip is hardened by cold-rolling, not >by heat treatment. When I was working in spring steel development I >could have rolled you some to your specification, but that was a long >time ago. > >-- >atp >"A motorcycle is a bicycle with a pandemonium attachment and is >designed for the especial use of mechanical geniuses, daredevils and >lunatics." >— George Fitch, Atlanta Constitution Newspaper, 1912 > > >___ >Emc-users mailing list >Emc-users@lists.sourceforge.net >https://lists.sourceforge.net/lists/listinfo/emc-users -- Sent from my Android device with K-9 Mail. Please excuse my brevity. ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Small spring, very simple flat
On Sun, 24 Jan 2021 at 22:13, Nicklas SB Karlsson wrote: > > Need a small springs, not very many, very simple flat metal. Force in > middle should be around 150N and guess 45mm long, 10mm wide , 0.6mm > thick will do the trick. Anybody have any idea where it is possible to > buy suitable material? Maybe flat ground stock? https://www.engineeringsupplies.co.uk/1mm-x-10mm-x-500mm-metric-gauge-plate.html Too thick, but could be surface-ground. Depending on the displacement you might not have to harden it. Hardening doesn't make the material any stiffer, it just means that it can bend further before the elastic limit is reached, 0.6mm is thicker than clock springs: https://www.ebay.co.uk/itm/224266845701 Is thinner and wider an option? High performance spring steel strip is hardened by cold-rolling, not by heat treatment. When I was working in spring steel development I could have rolled you some to your specification, but that was a long time ago. -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of mechanical geniuses, daredevils and lunatics." — George Fitch, Atlanta Constitution Newspaper, 1912 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Small spring, very simple flat
Worst case you find a scrap automotive spring. It is probably something like 5160. Torch cut a piece. Anneal, forge, mill, grind, etc to desired shape. Heat until it is not magnetic, quench in oil. Temper back to about Rc 50. Test. The first try may not be good. Adjust as necessary in thickness and temper. That is the long route. Of course you need a friend with a way to grind, shape and harden it. Machinery's Handbook has a pretty good section on springs. Your ruined saw may be your best bet; thin enough to cut with an abrasive disc. Short route: buy spring steel off web or preformed springs that look about right in dimension. Brownell's lists an assortment of 1075 but also says it out of stock. Steel outlet want to sell you a 100 lbs... :-( Good liuck. Dave ps. There must be better options. On 1/24/21 2:11 PM, Nicklas SB Karlsson wrote: Need a small springs, not very many, very simple flat metal. Force in middle should be around 150N and guess 45mm long, 10mm wide , 0.6mm thick will do the trick. Anybody have any idea where it is possible to buy suitable material? Have been looking on a used handsaw, probably rather good steel, it hit a nail anyway and would make many enough to try out it work well but do not have anything hand to heat it, to hard now and it to be hardened then cut. Nicklas Karlsson ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Small spring, very simple flat
150N for how much travel? On 1/25/2021 00:11, Nicklas SB Karlsson wrote: Need a small springs, not very many, very simple flat metal. Force in middle should be around 150N and guess 45mm long, 10mm wide , 0.6mm thick will do the trick. Anybody have any idea where it is possible to buy suitable material? Have been looking on a used handsaw, probably rather good steel, it hit a nail anyway and would make many enough to try out it work well but do not have anything hand to heat it, to hard now and it to be hardened then cut. Nicklas Karlsson ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Small spring, very simple flat
Need a small springs, not very many, very simple flat metal. Force in middle should be around 150N and guess 45mm long, 10mm wide , 0.6mm thick will do the trick. Anybody have any idea where it is possible to buy suitable material? Have been looking on a used handsaw, probably rather good steel, it hit a nail anyway and would make many enough to try out it work well but do not have anything hand to heat it, to hard now and it to be hardened then cut. Nicklas Karlsson ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
