Small hydraulic press build, not electrical yet.. - Page 1
Forum section: electronics / projects

author: Teljemo
author_rank: Contributor
timestamp: November 01, 2014, 11:52:32 pm
content: Got a small press together..i hope it's OK to post here even tough it isn't electrical jet..of course i'm planning on putting on some sensors and stuff laterThreading in the top partMiddle part drilled and plunged.a bit of welding to the top part is together with the bottom part..a little color and a jack, 4 screws and the middle plate that moves up and down with the jack.I have more info on my site and the first test is up on youtubehttp://www.workshopprojects.net/small-hydraulic-press/if there is any problem with this non electrical project in this category, plz remove it and i'm sorry!In another electronics forum i'm a member of we have a thread called my mini projects where you can post all kinds of small projects you want to show.. couldn't find any thread like that here?..

author: nctnico
author_rank: Super Contributor
timestamp: November 02, 2014, 01:30:15 am
content: How many tons is that jack? I'd make the strips on the side much wider or even better use U shaped or rectangular tubes for more stiffness so a bit of torsion is not going to make the structure collapse.

author: calzap
author_rank: Frequent Contributor
timestamp: November 02, 2014, 01:40:24 am
content: In the video, he states it's a 5-ton jack. I also have concerns about the steel strips on the side and the welds. Hope proper static calcs were done and that the welds are adequate. Main concern would be both sides failing when something with a fair amount of elasticity is being pressed. The rather heavy top could go flying.Mike in California

author: nctnico
author_rank: Super Contributor
timestamp: November 02, 2014, 04:00:14 am
content: Hence my comment. A couple of weeks ago I pulled some tree trunks from the ground with a 5 ton hoist. I pulled a piece of chain with 8mm thick shackles apart in the process.

author: Teljemo
author_rank: Contributor
timestamp: November 02, 2014, 10:18:01 am
content: yes it's 5 tons.No math in this build..I tried to break it but with no success.. i jumped on the jack leaver until i couldn't get it to move anymore and it didn't break!. the strips are some kind of harder metal.. it was originally used to hold much bigger press tools together during shipment. About 10 tons.. and the weld is really nice and deep.

author: wagon
author_rank: Frequent Contributor
timestamp: November 02, 2014, 11:49:38 am
content: Looks good, nice and useful!

author: zapta
author_rank: Super Contributor
timestamp: November 02, 2014, 02:18:30 pm
content: Quote from: wagon on November 02, 2014, 11:49:38 amUseful for what?

author: mikerj
author_rank: Super Contributor
timestamp: November 02, 2014, 02:26:25 pm
content: Quote from: zapta on November 02, 2014, 02:18:30 pmThe sort of things presses are generally useful for...

author: Teljemo
author_rank: Contributor
timestamp: November 02, 2014, 04:13:18 pm
content: like crushing flashlights!!!I have no use for it right now.. but when I need it I have itI ask't on my youtube channel for comments on what to use it for

author: zapta
author_rank: Super Contributor
timestamp: November 02, 2014, 06:02:44 pm
content: Quote from: Teljemo on November 02, 2014, 04:13:18 pm.. but never LIPO batteries ;-)If you want to play with it add a force sensor, see what you get, and compete with your friends who can get it higher.

author: wagon
author_rank: Frequent Contributor
timestamp: November 03, 2014, 02:31:36 am
content: Quote from: zapta on November 02, 2014, 02:18:30 pmPressing bearings in and out of housings, pushing things apart, etc. Lots of uses if you work on cars in particular.

author: Teljemo
author_rank: Contributor
timestamp: November 03, 2014, 03:08:16 pm
content: true! I do a lot of car work..I'm sure it will come in handy however =)

author: wagon
author_rank: Frequent Contributor
timestamp: November 06, 2014, 11:56:59 am
content: Quote from: Teljemo on November 03, 2014, 03:08:16 pmRotten cars...I have a vehicle hoist, a big air compressor, various big power tools, blow torch, big hammers, etc. in my electronics workshop. They get some use! (sometimes on cars)

author: G7PSK
author_rank: Super Contributor
timestamp: November 06, 2014, 12:38:31 pm
content: Those side bars will easily take the strain from that jack. Mild steel yield strength is around 4384.8 kilogram-force/square centimeter.

author: Kjelt
author_rank: Super Contributor
timestamp: November 06, 2014, 03:35:14 pm
content: Now add some crimp terminal inserts and use it as a crimping tool for your electronics hobbyHope the connectors survive

author: KG7AMV
author_rank: Frequent Contributor
timestamp: November 23, 2014, 01:28:51 am
content: Nice Build! I have a large 20 Ton Harbor Freight i would like compact one this is giving me idea's (I need to stop gathering project's my brain hurts!)

author: pmbrunelle
author_rank: Regular Contributor
timestamp: November 23, 2014, 05:59:13 pm
content: Instead of a purchased force sensor, it would be cool to add strain gauges to the steel flatbars. It could make a nice instrumentation amplifier project, and find a way to make it temperature-compensating, etc.Make sure to measure the tension in both flatbars though, so that you'll have the correct measurement even when your bearing/whatever is not perfectly in the middle.

author: SeanB
author_rank: Super Contributor
timestamp: November 23, 2014, 06:37:06 pm
content: You probably would easily be able to polish the bars and then epoxy a bare strain gauge to the metal, then encapsulate it in a flexible encapsulant and use it in a strain gauge to get the stress in the bar. Probablt easiest way to calibrate it is to get the diameter of the piston and attach a hydraulic pressure gauge to the system ( not easy on a compact jack, you need to drill through the housing to intercept the high pressure side and tap the hole to attach a high pressure pipe that is attached to the gauge) to measure the force applied to the bars.

author: Teljemo
author_rank: Contributor
timestamp: December 22, 2014, 10:11:24 am
content: haven't used it for anything yet.. hmm..changed bearings on my friends car the other day.. but used the vice and sledge hammer..the press was to small for that..Still waiting for some gas springs to add that helps separate the tables when done pressing...about measuring the pressure/force.. I thing I'll put that on hold for now.. better using a jack with a clock mounted on it from the start..