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Homemade Electro-Hydraulic Press

Homemade Electro-Hydraulic Press

The scope of hydraulic presses is quite wide: they can be used in car repair shops for pressing in, pressing out bearings, gears, shafts, etc. They are also used for stamping metal parts, pressing wooden shavings, plastic, rubber. Ready-made machines cost from 100 thousand rubles. In this article, the author describes a fairly budgetary, and at the same time high-quality design of a hydraulic press that can give a maximum force of 35 tons per 50 square centimeters.

Creating a machine will require access to the following equipment:
- Lathe;
- Drilling machine;
- Welding machine.

Tools such as a grinder and a drill will also be required.

The materials needed to create will be listed in the article itself.

In the process of creating the machine frame, it is important to pay great attention to its strength, since it will be subjected to tremendous mechanical stress. The metal thickness here should be sufficient to withstand the forces exerted by the hydraulic cylinder and not bend. The author of the article used 14 T-beam as the basis. A “P” shaped bed is boiled out of it, at the bottom of thinner channels and corners a base is made on which it will stand.

Approximately in the middle, a working platform of two thick channels is welded:

Initially, the author used another fastening of the hydraulic cylinder, but it vomited from the bed, so it was decided to dismantle and make a new one. If earlier the cylinder was simply welded to the beam, now it was decided to plant it through the flange on a 20 mm plate. The plate itself will be located on two T-beams.

In order to place the cylinder in the flange, the cylinder is machined on a lathe.

Here is the output:

The flange is made of a car hub, machined on the same machine:

Then a metal plate 20 mm thick was used. In order to make a hole in it for a cylinder, it needs to be somehow fixed into the machine.To do this, a round boss is welded to the center of the plate. For her plate is mounted in the machine.

Next are welding work. The plate is welded to the beams:

The flange is put on the cylinder, and scalded in a circle:

In order for the cylinder to sit evenly, the adjacent surface of the flange is machined on a lathe:

A plate with beams welded to it is installed in its place and welded:

Then, holes are drilled through the hub counter holes in the plate, through which the fixing bolts will pass.

In order for the cylinder to be attached not only at one point, another flange is machined, put on the top of the cylinder and welded to the beams.

T-beams in the upper part are welded together and the structure is ready. Next, an oil station is installed, supply hoses and the machine is ready.
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6 comments
Of course there is insanity, if possible, you need to choose a cylinder with a different mount. But after welding, the quality of the inner surface (roughness) has not changed. The geometry could change, but the piston has an elastic element that can compensate for it. Another negative stress moment may arise in the weld zone, and this can lead to rupture of the sleeve.
K.V.F.
to cook something to the hydraulic cylinder in the working part, the idiocy is MARAZM, because it is polished and honed on the inner working part to achieve the purity and accuracy of the cylinder, after welding, if it works, it will be very short. to grind the cylinder on top to fit the flange is idiocy, for this is achieved by grooving the flange to the size of the cylinder.
How is the hydraulic part of the press ???
In the description of the homemade product, much attention is paid to the manufacture of a reliable bed and for some reason almost no mention is made of the hydraulic part of the press. And just it is the most interesting.
Author
With high-quality welding, welds can withstand very large loads. Here the beams are welded in different places, I do not think that additional latches will strengthen the design.
Extremely useful thing in the workshop. Only with constant work due to heavy loads will there be problems in the places where the beams are fastened together. I think it’s worth reinforcing them with strips of metal on top of the seam. Make such a safety option. This will add durability to the structure as a whole.

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