Jaro Petrina 44 Posted September 12, 2017 Share Posted September 12, 2017 (edited) Continuous problems with hand and impossibility to have a power hammer made me build a press. Now, Firstly I did some calculation using a log splitter excell applet I adapted to my needs. It looked like at least 30 l/minute 200 bar pump and thus 7,7 kW motor will be needed. I bought most of the hydraulics - pump, block etc. online. The motor was second hand, this is basically 3 phase 10 hP (in imperials), it would be very expensive otherwise, this way it cost me 100 bucks (equivalent). Then I built the whole hydraulic agregate. It needed special star to pyramid switch and change of fuses on that line all the way out of the building. Be carefull if you do this you might need "C" or "D rated fuses/circuit breakers. I was at one point worried, that I wont be able to run this thing without start-up electronics, but it worked. The tank is calculated for 100 liters or about 25 gallons, but its not filled up to the rim, as its works also as expansion area. There is about 70-80 liters of hydraulic fluid in it at the moment. (On the last picture you see how I pumped the fluid from 200 l barell - as my friend says : "you are positivelly maniacal, but know your way around" Well it worked. I was looking for suitable cylinders - anything over 100 mm stupid expensive, 100 mm for my purposes and with this pump weak. Found two 85 mm. They do something like 11,5 metric ton at 200 bar each - that (in my calculation I thought I run it at 170 bars first, but screw it, since it runs so well), also the 1,2 sec for 100 mm movement needs to be doubled so its 2,4 sec for 100 mm or in other words 41,5 mm per second and enough for fast forging. (so the two cylinders give me 23 ton metric and 41,5 mm/sec ram movement speed - 23 metric tons is 25,7 us tons). The frame is standard 180 mm "I" profile, I have cut a technological hole in the lower beam and welded reinforcements over, to have a punch option. Total opening is about 24 cm = 10" out of wich 14 cm is the movement of cylinders and 4" is for combined tooling. I need to cut the legs, I calculated my working height badly, and weld the ram guides, then weld the upper tooling fixture to the ram. Than at least some basic tooling - I have nice 2" mine wagon axle which I can cut and use - as ts quenchable. Other than that it works fine and performs within the parameters I have projected originally. I should have this finished till end of the week. If you decide to build one, contact me, I tell you what NOT to do. If you need any calculations on the subject I can help you with that Jaro Edited September 12, 2017 by Jaro Petrina bad spelling 1 Link to post Share on other sites
Joël Mercier 525 Posted September 12, 2017 Share Posted September 12, 2017 Nice work! Link to post Share on other sites
Jaro Petrina 44 Posted September 14, 2017 Author Share Posted September 14, 2017 So its done. I made my first tooling from mineshaft wagon axle. Plenty of speed and power in that and runs very clean. Cant wait to try it for hot work! Jaro Link to post Share on other sites
Warner Smith 12 Posted September 18, 2017 Share Posted September 18, 2017 Well done! Impressive work! Warner Link to post Share on other sites
Jaro Petrina 44 Posted September 21, 2017 Author Share Posted September 21, 2017 Just to get you an idea the size of motor this is powered by. Jaro Link to post Share on other sites
Jaro Petrina 44 Posted September 24, 2017 Author Share Posted September 24, 2017 First hot tries. The guides need upgrade. But that is a small thing. Its almost too fast, too strong. On 30 mm rebar it does not slows. I need to put some flow valve on it, to be able to tame it as needed. Jaro Link to post Share on other sites
Alan Longmire 2,749 Posted September 24, 2017 Share Posted September 24, 2017 Nice! I thought the guides looked small, but as you said that is no problem to fix. Link to post Share on other sites
Jaro Petrina 44 Posted September 24, 2017 Author Share Posted September 24, 2017 Its not about the size. Its the inner ones - there are actually 3 bearings on each. But the fit is too loose. Link to post Share on other sites
Jaro Petrina 44 Posted December 25, 2020 Author Share Posted December 25, 2020 I have eventually used 40 mm linear guides for the ram and changed the cylinders for a single 135 mm bore. Its a nice machine now. 2 Link to post Share on other sites
Brian Dougherty 1,174 Posted January 8 Share Posted January 8 Nice. I've used my lathe for a lot of strange things, but never to power a transfer pump I'll have to remember that one... 1 Link to post Share on other sites
Jaro Petrina 44 Posted January 10 Author Share Posted January 10 On 1/8/2021 at 10:34 PM, Brian Dougherty said: Nice. I've used my lathe for a lot of strange things, but never to power a transfer pump I'll have to remember that one... Haha. Dire need is the mother of invention. I have since welded two flat bar reinforcements over the I beams. These are 180 mm and it is not enough for so much hydraulic power, because the 400 mm horizontal pieces were actually bending about 1 cm when under load. So I welded two flat bars 90X20 mm on the top and bottom of the frame. This seems to be holding. Link to post Share on other sites
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