A hydraulic press is an equipment that is intended for the processing of materials by pressure. The design is driven by a fluid that is under high pressure. The work of adaptation is carried out on the basis of Pascal’s law.
The hydraulic press can be made from a jack, it will be small and light, which is quite suitable for home use.
Such a press is a great helper for pressing a variety of inserts and sleeves, waste paper and metals. With it, you can easily punch holes on different bases. This design can be made by hand.
For a small workshop, there will be enough press that develops efforts of 10-20 tons or less. In this case, it all depends on what tasks will be set. In addition to efforts, such a device has the following basic parameters:
- piston stroke;
- pressure gauge;
- bed performance.
Drawing of the manufacture of press frames.
The product consists of several cameras. In the first - less - the liquid is under high pressure, it is fed through a pipeline or channel into a large chamber. In the second cylinder, this fluid will create a force on the piston, which is transmitted to the workpiece through the tool used. The press can work only in the presence of an emphasis. This element will not allow the displacement of the part under the influence of the working piston. Various oils can be used as liquids.
In most cases, the working cylinder is placed vertically or horizontally.
This device can be used in the automotive workshop. With it, you can perform, for example, car repairs. To extrude a bearing or a silent block, you will not need to contact the automotive service, because using a hydraulic press you can easily bend a metal part, make a straightening, fasten parts together under pressure, press plastic bottles, tin cans, paper or cardboard products.
Hydraulic press, which is made at the factory, is quite expensive. The hands can create a device that will meet the requirements of the owner. The product takes up little space. If there is no workshop, then the design can be placed in the garage room.
Useful tips you need to know
The location of the jack for pressing.
To create pressure in the working cylinder, in most cases a hand-mounted or detachable hydraulic pump is used. In this case, everything will depend on what equipment you plan to use to make a homemade press. The simplest option, which even a novice master can easily realize, is to manufacture a device on the basis of a bottle-type jack. This design will have a hand-mounted pump.
Before proceeding to the manufacture of a press, you will need to decide which works will be used for the construction. You should also find out what efforts it should develop. After that, you will need to pick up and purchase the appropriate jack.
The next step, which is particularly important, is the creation of a drawing of the manufactured fixture. Any press that is offered on existing drawings was developed and produced on the basis of hydraulic equipment and metal blanks that were available. Therefore, if you use someone else's development, then you can assemble the press for a very long time, since in this case the process will consist in fitting the design, which is taken as the basis, to the purchased hydraulic jack.
In the process of creating a drawing, it will be necessary first of all to determine the pattern of operation of the pressing device:
- The jack is mounted on the base of the bed and presses up.
- The design is fixed at the top of the bed and presses down.
The correct working position, the press - vertical, sliding rod up, this design can not be turned over.
It should be remembered that for the manufactured jacking structures the correct working position, which is provided for by the manufacturer, is vertical, with a sliding stem upwards. It is not allowed to turn over such a construction.
In most cases, the first option is used. The second is more suitable for certain types of plumbing work (pressing out sleeves and bearings from any blanks).
For the manufacture of a press from a jack you will need to prepare the following elements:
- welding devices;
- hacksaw or grinding machine with a cutting disc;
- bottle jack;
- retractable springs;
- channel bars;
- metal profiles;
- tubes of rectangular and square section;
- sheets of steel;
- strips of steel.
How to develop a drawing of a press with a hydraulic jack
It will be necessary to develop a frame within which the jack will press the blanks. It must be durable and be calculated with a margin on the force that develops a jack. The press, which is activated, will press up and down at the same time, trying to break the frame. The base of the frame should be able to ensure maximum stability of the press structure. The base is recommended to be in the form of a platform. The width of the protrusion of the frame will depend on the size of the parts that are intended for processing. The dimensions of the structure must be larger than the sum of the dimensions of the mounted parts of the pressing device.
The height can be folded from the size of the jack, the free movement of its stem, the thickness of the moving working table and the height of the parts that are intended for processing. The jack can be mounted on the base, while the upper part of the frame will be used as an emphasis for blanks. The force from the rod is transmitted to the workpiece through a moving work table. You will need to install it over the jack on the frame, on which he will be able to quickly move up and down. This device should be held guides on all sides.
On both sides of the jack, you will need to fasten the spring-off springs - one eyelet is attached to the base of the frame, the other should be fixed to the moving table. These springs will be used to compress the jack to its original position when the rod is not extended. The stiffness and size of the springs must match. In some cases, a rod-shaped construction is put on the rod, to which one of the eyelets of the springs is attached. The second eye should be attached to the base.
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Jack press: an example design
Diagram of a hydraulic press for 5 tons of jack.
Another press operation scheme assumes that the bed base will be used as a support for blanks. The jack in this case is mounted on a moving table, which is suspended from the upper part of the frame on special springs. Under the head of the jack rod in two working diagrams, a nest is provided on the interface unit. The nest can be located on the bottom of the desktop or on top of the bed. In this case, you can use a small segment of the tube of the appropriate diameter.
In order to regulate the free stroke of the jack rod and the height of the workpieces being processed, the following actions can be performed:
- In the upper part of the bed you will need to make a screw drive with a steering wheel. By twisting the screw with the tile at the end, you can reduce the clearance for the blanks inside the bed.
- In another case, a removable stop is provided, in the role of which a removable moving table is used. This element can be fixed on the frame with bolts and nuts or rods. To do this, in the frame it is necessary to drill holes. The height step must be less than the stroke.
- It is possible to envisage the use of removable lining inserts that are made of a metal profile.
- You can combine all the methods that were listed above.
All dimensions on the diagram should be indicated taking into account not only the size of the jack, the parts being processed, but also the dimensions of the metal-roll that is planned to be used in the process of building a press.Back to table of contents
How to make a press from a hydraulic jack yourself: instructions
Diagram of a portable press driven by a hydraulic jack.
The jacking platform for the support is the main component of the hydraulic press. The resulting pressure is proportional to the upper nodes and the surface. The base must have increased strength. To do this, you need to prepare several ribs with the same rigidity as at the base. In this case, it is best to use a metal profile of a square or rectangular shape. The dimensions of the device can be 40x50 mm or 50x50 mm. The length of the products should be approximately 250-300 mm. These devices fit the sides to each other. After that, the butt seams in the upper and lower parts are welded by the welding device. Thus it will be possible to increase the rigidity of the base of the press, as a result, the stability of the jack will be increased. You will need to weld a plate of steel 10-12 mm thick to the base. The dimensions of the plate should be 250x200 mm.
In the next step, you will need to make with your own hands an abutment of the press and vertical stands. To make the stops of the hydraulic press construction itself, you will need to saw off 2 blanks of the desired length from a steel tube of rectangular or square shape. In this case, fit only the tube of large thickness. To determine the length of the pipe, you need to find in the instruction of the jack the value of the maximum stroke of the operating rod, then add to the resulting value the height of the jack and the platform for the support. The stop can be made of thick steel tube. This element is connected to the racks by welding, for which you will need to use a welding device. As a result, it will be possible to obtain a U-shaped structure, which is welded to the base.
All elements of the structure will need to connect perpendicularly.
To do this, you will need to weld at a 90 ° angle several angles of steel 40x40 mm onto a sheet 10 mm thick. The connected parts will need to be put in this fixture, and then welded. This way you can set the correct angle. For convenience, additional clamping products can be added to this angle piece, which will be able to fasten the connecting elements and prevent damage to the joint angle during the welding process due to temperature changes in the metal billet.Back to table of contents
Manufacturing removable stop hydraulic press
Diagram of a lever press driven by a hydraulic jack
In the next step, you will need to make a removable stop. This device will move along the guides, transfer pressure to the workpiece from the working rod, which is located in the central part of the structure. For the manufacture of such parts will need to prepare a few pieces of strips of steel, whose thickness is approximately 10 mm. The length of the strips should be slightly less than the distance between the racks. These elements will need to be sealed from two sides in several places.
At this stage, the manufacture of a homemade press from the hydraulic jack is completed. When the press is not necessary, the jack can be easily dismantled from the construction and used for its intended purpose.
In order to be able to quickly replace a part in the future, it will be necessary to prepare several through holes, and then cut off 2 plates. The length of the plates should be 10 cm longer than the size of the block. They also need to drill a few holes. To install the unit on the hydraulic press frame, you will need to prepare several long-length bolts, nuts and washers. Such plates will need to be connected to the unit on both sides of the racks.
In the end you will need to make the adjustment of the press from the jack. If there is a need to reduce the free stroke of the piston of the structure, it is necessary to reduce the distance between the top beam of the device and the moving stop. To do this, you need to mount another transition metal square profile. To prepare it, you need to saw off a section of the profile so that its length is equal to the distance between the racks. Next, you need to attach it at the same distance with the weld seam. In this way, the distance of the hydraulic press can be reduced.
To further reduce the movement of the working stem of the structure, you will need to use additional spacers, which are made of a metal profile or of small replaceable anvils.
A similar design can be used in the process of making various stamped patterns on some blanks. You can make commemorative medals or coins of non-solid alloys.
It is easy to build such a device with your own hands, you just need to follow the sequence of actions and prepare all the necessary tools and materials.