In detail: do-it-yourself repair of a hydraulic hand pump for a press from a real master for the site my.housecope.com.
When performing various works in a home workshop, it is often necessary to influence the workpieces by pressing. We will talk about how to make a hydraulic press with your own hands to perform such operations in this article.
Homemade hydraulic press
A hydraulic press is an equipment that is specially designed to process parts and workpieces by applying high pressure to them. Such a press works due to the pressure of the liquid acting on the elements of its structure.
Most hydraulic presses are designed with a vertical working cylinder, but there are also models in which it is located horizontally. Various press models can generate operating forces ranging from tens to several thousand tons.
Factory made hydraulic press option
The principle of operation of a hydraulic press is based on Pascal's law, known to us from a school physics course. The design of the press consists of two working chambers of different sizes or, as they are also called, cylinders. The principle of operation of a hydraulic press, to describe it in a few words, is as follows.
In the smaller of its cylinders, a high pressure of the working fluid is created, which is fed through the connecting channel into the chamber of a larger diameter and acts on the piston connected to the working tool. The latter exerts pressure on the workpiece, which is located on a rigid support in order to avoid its movement under its action. All hydraulic presses use special oils as a working fluid.
Video (click to play).
Working principle of a hydraulic press
The most widespread use of hydraulic presses is found in performing such operations on metal parts as stamping, forging, straightening, bending, extrusion of pipes and other profiles. In addition, with the help of such presses, briquetting, packaging and pressing of various materials is carried out (as a rule, a mini-press is used for this purpose).
The device of a hydraulic press makes it possible to actively use it both in enterprises for the production of rubber, plastic and wood products, and in other areas. The variety of functions and scopes of this equipment determine the existence of its various modifications. For example, on sale you can find a hydraulic bench press, a mini-press, a hydraulic floor press, a hydraulic manual press, presses with and without a pressure gauge.
The use of a hydraulic press in a garage or home workshop is quite common. It is possible to use such a press, which is notable for its small size, both when repairing a car, and for performing work of a different nature.
VIDEO In particular, with the help of such compact equipment, it is possible to press out bearings or silent blocks, as well as press new parts in their place. In addition to automotive repair, the hydraulic press can be used to bend metal parts, create the required pressure when gluing surfaces, briquetting waste, to squeeze out oil and liquid. Factory equipment for this purpose (even a manual hydraulic press) costs a lot of money, and not everyone can buy it.Meanwhile, you can make such a press with your own hands, spending money only on the purchase of the necessary materials.
Using the press as a juicer
Remarkably, the design of a house-made hydraulic press can be immediately adapted to solve a specific problem with a specific part or workpiece. A self-made press does not take up much space; it will be enough to allocate a little space in a workshop or garage to place it. Detailed instructions on how to make a hydraulic press are given below. There is also a video on this topic at the end of the article.
Self-made hydraulic presses should not have too outstanding technical characteristics, it is quite enough that they develop an effort of 10–20 tons. This parameter of a homemade hydraulic press depends on what actions you intend to perform with it.
One of the most common and simple options for a homemade press
There are a number of other parameters that not only industrial, but also home-made household hydraulic presses correspond to:
sizes;
weight of equipment;
piston stroke;
the presence of a pressure gauge in the design of the press;
characteristics of the bed used.
In home-made presses, the pressure in the working cylinder is usually created using a manual hydraulic pump, which can be either built into the design of such a device, or located separately from it. This design feature depends only on what equipment you choose to make such a device. It is very easy to make a hydraulic press with your own hands, if you take a bottle-type jack as the basis for its design. Such a jack, which is convenient, has a built-in hand pump in the design.
Bottle type hydraulic jack is great for use in a DIY hydraulic press
Before you consider purchasing a suitable jack for making your home hydraulic tool, it is important to decide what tasks you will be using it for. Both the design diagram of the manual hydraulic press and the effort that it will develop depends on this. The next step is to develop a drawing of a hydraulic press, which you are going to make with your own hands. You can, of course, find such a drawing on the Internet and even watch photos and videos of the process of making a press from a hydraulic jack with your own hands. But in this case, you will be faced with the need to adjust your existing devices to someone else's homemade press.
Manual hydraulic pump
The development of a blueprint for your future home-made press begins with deciding the question of how it will work. There are only two options here.
The jack will be located at the bottom of the press - on its bed - and will push upwards.
The jack is fixed in the upper part of the press structure and presses down accordingly.
However, when choosing a scheme for the operation of a home-made press, one should take into account the fact that for the main part of jacks produced by modern industry, the only correct location is with the pressing rod upwards, and it is simply not allowed to place them differently. That is why most often the first diagram of a hydraulic press is taken as a basis. The second option is used only in cases where it is required to make hydraulic equipment with your own hands for extruding bearings or bushings from individual assemblies and mechanisms.
Bottom Jack Option
The supporting element of any press, including home-made ones, is the bed, the development of the drawing of which should be approached as responsibly as possible.Structurally, the bed is a frame, inside of which there is a jack with a working tool that exerts pressure on the part or workpiece.
The type of bed can vary significantly depending on the purpose of the press.
The lower part of the bed - its base - is designed taking into account the fact that it must ensure high stability of the entire structure. When calculating the width of the internal opening of the frame of a home-made press, take into account both the dimensions of the parts and workpieces that will be processed on it, and the total dimensions of all the constituent elements of the future press.
Another bed option with a simpler base design for stability
When calculating the height of the inner opening of the frame, the following parameters are summed up: the height of the jack, the desired amount of free stroke of its rod, the thickness of the working body and the part that needs to be processed. If a homemade press is made according to the first scheme, then its design looks as follows: the jack is installed on the lower base, and the part is installed in the upper part of the frame; the force from the jack to the part is transmitted through its rod and a movable working platform moving along the guides in the side frame elements.
VIDEO
In order to ensure the return of the rod to its original state, two springs are used, the lower part of which is attached to the base, and the upper part to the movable working platform. If you decide to make a press from a jack with your own hands, then it is very important to correctly calculate the stiffness of the springs so that they effectively perform all the functions assigned to them.
When implementing the second scheme, a part is placed on the lower base, and the jack is installed on a movable platform, to which springs are also attached, connecting it to the upper crossbar of the frame. Both in the first and in the second case, a so-called socket is made at the point of contact of the rod with the movable platform or the upper crossbeam of the frame, which can be used as a piece of pipe of the corresponding diameter.
The inability to adjust the height of the working area simplifies the design, but significantly limits the options for using the press
A do-it-yourself hydraulic press will be much more convenient to use if it provides for the possibility of adjusting the free jack rod, which also affects the permissible height of the workpiece. To do this, you can do the following.
An additional plate is located in the upper part of the inner contour of the frame, which can be moved along the guides due to a screw drive with a steering wheel. Thus, it is possible to change the clearance within a sufficiently wide range for the arrangement of parts inside the frame.
You can make a removable stop, which is most often used as a removable mobile platform. The position of such a stop inside the frame can be fixed using bolted connections, for which holes are drilled in the frame with a certain pitch. In this case, the pitch of the location of such holes in height should not exceed the value of the free stroke of the jack rod.
From a solid piece of metal or a metal profile, you can make several replaceable spacers of different thicknesses.
You can also use several of the above methods at the same time.
VIDEO
If you are making a drawing according to which you will make a press with your own hands, be sure to indicate not only the dimensions of the main elements of such a device and the workpiece to be processed, but also the dimensions of channels and other rolled metal from which the frame will be made.
If you are going to make a hydraulic press with your own hands, then you will need the following tools, consumables and equipment:
welding equipment;
electrodes;
hacksaw for metal or grinder (angle grinder).
In addition, you will need the following elements that will make up your future garage press: a hydraulic jack, two springs that will pull the movable platform back to its original state. If you find an old bridge fungus in your garage left over from repairs, it can be used as a pull-back piece for homemade balers with a bottom jack. In this case, the fungus is put on the jack rod, the upper part of the springs is attached directly to it, and the lower one is fixed on the bed.
The type and amount of materials required for the construction of the press strongly depends on the chosen design option.
In order to make a press from a jack, you will need the following rolled metal products:
channels (at least 8 numbers), rectangular or square pipes (with dimensions of at least 40x40), corners with a shelf width of at least 50 mm;
steel sheet with a thickness of at least 8 mm, which will be used as a reliable base for the entire structure;
a piece of steel strip 10 mm thick - for the manufacture of guides and stiffeners, if necessary;
a piece of pipe - for making sockets for the head of the jack rod.
When the drawing of your future hydraulic press is ready, and all the necessary materials, tools, equipment and components are available, go directly to manufacturing. The first thing to do is to cut all the metal, guided by the dimensions indicated in the drawing.
One of the drawing options for making a press
Now the base of the press should be made, for which the prepared square pipes are welded together, and a steel plate is welded onto the rectangle formed from them. Then the side and upper parts of the frame are welded together, carefully ensuring that the resulting U-shaped structure is even and has strictly right angles in the joints. The resulting structure should now be welded to the base and the frame for your hydraulic press is complete.
The next element that you will need to make for the press is a movable platform. For its manufacture, you can use a channel, square or rectangular pipe. In the central part of the platform, a piece of pipe is welded, which will serve as a socket for the head of the jack rod. To make the rails for the work platform, you need two steel strips, the length of which should correspond to the width of the press frame along its outer contour.
Variant of the design of the press with a movable bottom platform, which is fixed with bolts
The strips are attached to the lateral sides of the mobile platform using bolted connections, having previously placed it inside the frame. A removable stop is made in the same way, but holes are drilled in its guide strips opposite the frame racks for fixing at the desired height. The process of making a hydraulic press with your own hands is completed by the installation of pull-back springs and the jack itself. Such a hydraulic press is also convenient because you can always remove the jack from it (for example, if you need to use it to repair a car).
VIDEO
The simplest to design and operate is a hand-operated hydraulic pump. It is based on the principle of displacement of liquids. In industry, such units are quite in demand, their main function is to pump fuel and lubricants.
The manual hydraulic pump consists of two main parts, the pumping unit (1) and the hydraulic tank (2). They are connected by a pin (3). You need to fill in the liquid through the hole, after unscrewing the plug that closes it (4). The handle (6) with the lever (7) drives the plunger (8) of the first and second stages, made as one piece. The pumping unit has a two-stage structure.Stage number one at reduced pressure and higher capacity serves to accelerate the movement of the hydraulic cylinder plunger. Stage two at high pressure and lower capacity serves to obtain the operating force of the actuator. Overload protection is provided by a safety valve (9). Depressurization and extraction of hydraulic fluid from the cylinder cavity into the tank occurs with the help of a screw (10).
It is imperative to inspect the tool before starting work with any pump and if cracks or chips are found on the surface, do not use it. It is important to check if the high pressure hose is firmly connected to the hand pump.
We connect the pump to the hydraulic system with a quick coupler;
We turn the valve clockwise to the end.
Move the pump handle up and down with translational movements. As a result, oil is pumped into the system from the pump. At the same time, pressure is built up in the system, and also the piston stroke of the hydraulic tool into which we pump oil occurs.
In a situation where the working piston of the system into which the oil is poured reaches the end position, an increased pressure will be created in the system, as a result, it will be impossible to pump oil. Then it is necessary to stop the operation of the pump in order to avoid damage to the device.
In order to reduce the pressure in the system, slowly turn the valve counterclockwise to the end. As a result, oil from the system will flow back to the pump. This is due to the return of the piston to its original position.
Having finished pumping oil, it is worth inspecting the hydraulic system for oil leaks, and the pump should also be inspected. If you find leaks, you should immediately fix them.
We are ready to offer you not only professional repair of hydraulic motors and hydraulic pumps, but also, which is no less important, their preliminary diagnostics directly on the equipment. Very often, the problem of low efficiency of equipment operation is not associated with the operation of these units, but with their incorrect setup and adjustment.
Experienced field crews will not only be able to diagnose and configure the equipment on the spot, but also, in the event of a malfunction in the hydraulic motors and pumps themselves, dismantle them for repairs in a service center. You will not only save money, but also time.
The service department of the Tradition-K Company carries out routine and overhaul repairs of axial piston hydraulic pumps and hydraulic motors of the following models (series) and manufacturers:
series 310, 410, 313, 303 produced by PSM-Hydraulics;
pumps NP , hydraulic motors MP production Hydrosila ;
pumps K3V, K5V, NV and hydraulic motors M5XM2X production KAWASAKI ;
pumps A7V, A8VO A10VO, A11VO and hydraulic motors A2F , A6VM production REXROTH ;
pumps HPV production HITACHI ;
and many other leading global manufacturers.
We make repairs hydraulic pumps and hydraulic motors planetary type, radial piston motors , vane pumps and motors used in hydraulic systems of machines and mechanisms in various industries and construction.
During the repair, a complete defect identification of the product is carried out and a cost estimate is drawn up, which describes the detected defects and malfunctions, indicates the types and amount of work required to repair the product and a list of spare parts used in the repair. The repair is carried out by highly qualified specialists with extensive experience in the repair of hydraulic equipment and using special tools.
Depending on the type of hydraulic motor, hydraulic pump and the degree of wear of the component parts, repair options will be offered based on the results of troubleshooting:
replacement of seals;
grinding and lapping of working surfaces;
replacement of bearings;
replacement of pumping units;
restoration of fit dimensions for bearings and oil seals;
restoration (manufacturing) of the case;
restoration or replacement of the regulator.
In case of economic inexpediency of repair, we are ready to offer you a large selection of both new and refurbished hydraulic units.
Thanks to well-established channels for the supply of spare parts, the parts and assemblies required for repair are supplied directly from the factories - manufacturers of the product received for repair.
Upon completion of the repair work, all 100% of the products are tested on a specially equipped hydraulic stand. During the tests, readings of the technical parameters of the product are taken and a conclusion is made about how well the repair was performed. At the end of the tests, a decision is made whether it is possible to give the product to the customer or whether it is necessary to modify it and re-test it.
Upon completion of repairs and testing, the product is warranted for six months.
At the first stage of repair, equipment diagnostics is carried out, the identified malfunctions are assessed, the reasons for their occurrence. Elimination options, risks and costs are identified. After agreeing on the price, terms and types of work with the customer, repair and technical work is carried out:
troubleshooting of products includes disassembly, identification of the reasons for failure, cleaning of parts;
replacement of components: pumping unit, cradle, rotary plate, bearings ...;
replacement of worn-out parts and assemblies: distributors, bushings, regulator, shaft, seals, rubber seals;
elimination of dirt, wear and tear and its traces;
restoration of the tightness of the locking elements;
adjusting valve regulators;
The assembly is carried out using the necessary materials and equipment for reliable sealing, grinding of units and parts. Further tests are carried out using a specialized stand. The technical indicators are checked for compliance, the restored units are pumped.
Based on the results of the check, additional refinement can be made or a report can be drawn up, which is provided to the client along with the repaired hydraulic pump.
Our advantage is the ability to repair any type of imported hydraulic pumps: radial and axial piston, gear, gerotor, manual and blade. All work is carried out on site, which can significantly save time and money.
We can order the repair of hydraulic pumps of various brands: Caterpillar, DAEWOO, Denison Hydraulics, EATON, Hitachi, Kawasaki, KAYABA, Komatsu, Linde, NACHI, Parker, Rexroth Bosch, Sauer Danfoss, TOSHIBA, VICKERS, etc.
Such a problem arose, since in hydraulics it is not a foot in the tooth, but a press is needed for work.
Also, such a manual hydraulic pump was purchased.
What should be the oil level in the pump, which valves should be open or closed!
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The shut-off valve for the oil supply does not work, namely, there may be shells on the neck (landing) of the valve, or the ball itself in the shells. It is necessary to disassemble and check, if there really are shells, select the ball by size, and then rivet a new seat with it. Either the pressure reducing valve does not work, there are also sinks, or the pressure plate (spring) of this valve is not tightened or is missing at all. It is not necessary to sin on the air, if the pump presses, then the air will whistle back into the pump when the return line is opened.
I went through all this myself, as they say, "I ate the dog."
How can a high pressure pump be made? Where can you find a good step-by-step guide with photos or videos?
How can a high pressure pump be made?
The simplest method for making a high pressure pump is to make a small alteration of an automotive hydraulic jack. For example, a 3-tonne jack with a cylinder diameter of 28 cm has an area equal to 6.15 cm2. This makes it possible to obtain a pressure of 488 atmospheres. Converting the jack into a pump consists in replacing the long rod with a short piston, and a plug is fixed on top. In the plug, holes should be made for the valve, the filling hose and the pressure gauge, which are mounted there. To operate the pump, a cylinder is used in which there is a working gas under a pressure of 300 atmospheres.
Where can you find a good step-by-step guide with photos or videos?
I think that step-by-step instructions will not be required for such a rework. I attach a diagram of the jack's operation before and after the alteration, as well as a photo of the assembled pump made. In case something remains not understood - watch the video
VIDEO
Repair of hydraulic pumps is often necessary when problems arise with this special technique. Often, such a situation does not require the intervention of qualified specialists, and if you have a little certain knowledge, you can fix it with your own hands.
It is suggested to get acquainted with the most common malfunctions and ways to eliminate them from the article.
The operation of any hydraulic pump is based on the principle of suction and discharge of liquid.
Main structural elements:
A liquid moves between them, which, when the pressure chamber is filled, begins to press on the piston, displacing it, imparting movement to the working tool.
Basic operating parameters of all types of hydraulic pumps:
Engine speed, measured in rpm.
Working pressure in the cylinder, in bar.
The volume of the working fluid, in cm³ / rev or the amount of fluid displaced by the pump during one revolution of the motor shaft.
The main types of equipment:
Manual hydraulic hydraulic pump ... This is the simplest unit operating on the principle of liquid displacement.When the handle is pressed, the piston moves upward, which creates a suction force and, through the KO2 valve, liquid enters the chamber, which is displaced when the handle is lifted.
The advantages of such units:
low performance compared to drive units.
Radial piston. They are able to develop pressure up to 100 bar, have a long period of operation. Radial piston pumps can be of two types:rotary. In such devices, the piston group is placed inside the rotor, from its rotation, the piston makes reciprocating movements, alternately joining the holes for draining the liquid through the spools;
Rotary radial piston pump device
with eccentric shaft. Its difference is the location of the piston group inside the stator; such pumps distribute liquid through the valves.
high reliability;
work is done with high pressure, which increases productivity;
creates a minimum noise level during operation.
high pulsation rate during liquid supply:
large mass.
Axial piston. This is the most common type of equipment.Depending on the location of the axis of rotation of the engine, there may be:
The advantages of such pumps:
high efficiency;
high performance.
high price.
Gear pumps refer to rotary equipment ... The hydraulic part of the structure consists of two rotating gears, their teeth, upon contact, displace liquid from the cylinder. Gear pumps can be:with external gear;
with internal gearing, in which the gears are located inside the housing.
The photo shows the types of gear pumps.
Gear units are used in systems where the operating pressure does not exceed 20 MPa.They are most commonly used in agricultural and construction equipment, lubrication systems and mobile hydraulics.
Simple construction.
Small size.
Light weight.
Low efficiency, up to 85%.
Small turns.
Short service life.
Advice: To increase the service life of the hydraulic pump, it is necessary to strictly follow the requirements of the operating instructions.
Almost all breakdowns that occur during the operation of hydraulic pumps are the result of such factors as:
Failure to comply with the rules of equipment control and neglect during its maintenance:
untimely replacement of oil and filters;
elimination of leaks in the hydraulic system.
Errors in the selection of hydraulic fluid or oil.
The use of accessories that do not correspond to the operating mode of the pump.
Incorrect hardware setup.
The table provides a list of the most common malfunctions and how to fix them:
Clearance in the control rod.
The bearing seat pins are broken.
The channel between the control spool and the piston is dirty.
Seizure received on the surface of the piston impedes its smooth movement
Check and repair, if necessary, the hydraulic pump
The resistance of the hydraulic line between the remote elements of the pressure compensator and the control panel has increased.
Low control pressure
Adjust equipment control pressure
The drive shaft splines are worn out.
Piston shoes or pistons themselves are worn or damaged
Bearings worn out too much
Pressure compensator incorrectly aligned.
The spool of the control mechanism has broken.
The springs of the control valve are damaged or broken.
Seizure has formed on the spool or bore.
The control cylinder springs are damaged or broken.
Malfunctions of elements in the circuit of the remote pressure compensator
The minimum working volume of the equipment is set too high.
The supporting surfaces of the hydraulic pump cradle and the saddle of the support bearings are worn out or damaged
Check and, if necessary, repair the hydraulic pump
The channel from the output channel to the control spool is dirty
There is a low level of working composition in the tank.
Low pressure at the inlet to the hydraulic pump.
Worn or damaged interface surfaces between the cylinder block and the distributor.
Poor heat exchanger cooling. Inspect the heat exchanger, rinse and clean the cooling surfaces.
driven by liquid under great pressure. At the heart of the hydraulic press is Pascal's law.
The device has two cylinders or chambers. In one, smaller one, the liquid is brought to a state with high pressure, and is transferred through a special channel or pipeline into a large, working chamber, in which the incoming liquid forms a force on the piston, and transfers it to the workpiece with the help of an executive tool. Important the condition for the operation of the press is the installation of the stop , which does not allow movement of the workpiece or part under the action of the working piston. Various oils are used as a liquid.
Typically found in modern production hydraulic presses the arrangement of the working chamber is usually vertical , but it can also be horizontal. Taking into account its purpose and the type of processed materials, this device develops efforts from tens to thousands of tons of pressure.The press is often used in metalworking for forging, stamping, bending and straightening, extrusion of pipes and profiles, as well as for packaging, briquetting, pressing of various materials, making wood-shaving, plastic, rubber products and in many other areas of activity.
VIDEO
The purchase of a factory-made press will cost a lot. But this tool can be made with your own hands spending only on the required materials. Moreover, you can make a device adapted and adapted to specific needs, taking into account the necessary tasks. Since a homemade hydraulic press will in any case need a certain place, in the absence of a workshop, it can be installed in the garage.
VIDEO
For home conditions, the press is quite enough, which creates an effort of 15-25 tons or less - it depends on the required tasks. In addition to effort, this device has the following basic criteria:
sizes;
the working characteristics of the bed;
presence of a pressure gauge;
piston stroke.
In the working cylinder, a separate manual or built-in hydraulic pump is usually used to generate pressure. This will depend on the choice of equipment for assembling the press. The simplest, easily manufactured version of the press is the design is based on a bottle-type hydraulic jack where the built-in hand pump is located.
Before you start assembling a hydraulic press with your own hands, you need to decide for what needs it will be used and, of course, what kind of effort it needs. Then you need to choose and buy the necessary jack , in case it is used in the manufacture of a press.
The next, most important stage is the creation of a drawing of the assembled press. All the drawings offered on the Internet for the manufacture of a hydraulic press are developed and executed on the basis of already available hydraulic equipment and metal materials. Therefore, if you strictly follow other people's schemes, then making a press with your own hands can stretch out forever and will consist in adjusting and altering, taken as the basis of the scheme for a purchased hydraulic jack.
When completing a drawing, you first need to choose a scheme for the operation of the equipment:
the jack is fixed on top of the bed and presses downward;
the jack is located on the base of the bed and pushes upwards.
And do not forget that for the manufactured jacks, the normal working position, which is provided by the plant, is vertical, with the output rod upward. The jack must not be turned over!
The second option is most often chosen. The first is more convenient for certain types of work, for example, for extruding bearings from some parts, bushings.
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the press will begin to press simultaneously up and down trying to break the bed. The base of the frame must provide sufficient durability for the press and, best of all, be in the form of a platform. The width of the frame opening will depend on the dimensions intended for pressing materials, but it must be no less than the sum of the widths of the press equipment elements.
The height is summed up from the dimensions of the jack, the required free movement of its rod, the height of the parts intended for pressing and the thickness of the mobile work table. With the scheme of the second work, the jack is attached to the base, and the top of the frame serves as an emphasis for the products. The pressure from the stem is transmitted to the workpiece using a movable work table. It is installed on top of the jack on the bed, along which he must move freely up and down held by the side rails.
On both sides of the jack, the springs are fixed: with one eyelet to the base of the frame, and the other to the movable table. Their purpose is to compress the jack to its original state when the rod does not protrude (the size and stiffness of the springs are selected accordingly). You can also make the option when a tool in the form of a mandrel is put on the stem, where one eyelet is attached, and the other is attached to the base.
The first scheme of the press operation implies that the base of the frame will be the emphasis for the products, and the jack is mounted on a movable table suspended from the top of the frame on springs. Under the base of the jack rod in two schemes, a nest is made on the interface. This can be a small piece of pipe of the appropriate diameter.
To regulate the free movement of the jack rod and, of course, the height of the workpieces, the following solutions are possible:
provide for the installation of replaceable inserts-linings from a hollow or solid metal profile;
make a removable stop in the form of a movable work table, which can be fixed on the bed with rods or nuts and bolts. For this holes are made in the frame with a distance in height less than the movement of the jack rod;
a screw drive with a steering wheel is installed on top of the frame. By tightening the screw with the plate at the end, you can reduce the clearance for products inside the frame;
combined use of the above options.
All dimensions in the project must be indicated taking into account the dimensions of the objects of pressing, the jack, as well as the dimensions of the intended metal rolling for use during the manufacture of the press with your own hands.
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angle grinder or hand saw;
electrodes;
welding machine.
The purchased hydraulic press is used as a power device. Door springs from the front seats of the car or other suitable ones. When the jack is in the lower position, the bridge fungus can be selected as an element of the pull-back device. It is put on the rod, the springs are fixed to it and the base of the bed.
Details that may be required:
a piece of metal sheet from 8 millimeters - if you need flooring on the base or other parts of the structure to level the surface;
channel more than No. 8, square or rectangular shaped pipe from 35x35 mm, angle from 45x45 mm - for the frame, its base, mobile work table, removable stop;
a piece of pipe for the stem head (of the appropriate section, approximately 1 cm long);
metal strip 1 cm - for stiffeners, frame guides (if necessary).
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metal is cut to size described in the drawing. Make all the necessary holes, if provided by the project, on the specified details.
After that, the frame is welded from the sections of the square shaped pipe, the seams on the joints are boiled from below and from above. From above, by means of welding, a metal plate of the required size is fixed. Also, with the help of a welding unit, they make a U-shaped structure with clearly right angles, it is securely attached to the base and the frame is ready.
Assemble a mobile work table. For what you can choose a pipe or channel cut to a size smaller than the intermediate distance of the frame struts. A piece of pipe is welded to the channel under the jack rod.In the role of table guides, parts of the strip are usually chosen with a length equal to the width of the frame. Having wound the channel between the frame posts, the strips are installed on the side and the entire structure is fastened with nuts and bolts. A removable adjustable stop is also assembled, but holes are made in the strips opposite the racks for fastening at the required height.
After that, in the provided places, the springs are fastened in a convenient way. Pulling back the mobile work table, attach the jack - the do-it-yourself hydraulic press is ready. If there is no need for it, then the jack can be easily removed and used for its intended purpose.
Video (click to play).
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