Manual sheet bending of industrial production. How to make a leaf bending with your own hands

In the mass production of products from galvanized sheet, automatic machines with high productivity, roller rolling aggregates, edge banding machines, and devices for rolling gutter seams are used. For the manufacture of metal products and galvanized sheet in small portions, intended, for example, for private construction or a small industrial shop, it is economically advantageous to use manual sheet bending.

What is a sheet bending machine?

New equipment was created to facilitate manual production in the manufacture of metal gutter elements, galvanized aprons, gutters, and other small elements of the roof. Sheetogib is a metal rolling mill, used for bending brass, steel, aluminum, corrugated board, other flat sheets. Manual roll bending is able to bend the metal at the required angle, without violating the plane of the material.

For works on the farmstead of a private house, it is not worth buying an expensive bending unit, it is much more profitable to make hand-held sheet-arms by your own hands. Reviews say that the self-made device works with metal up to 2 mm thick, the length of the passing workpiece is 4 m, the profile can be bent at an angle of up to 180 °. Of the design details, you can call a crimping device with a lever, a base and a clamping mechanism.

Where are industrial sheet benders used?

Machines are used for making bent parts in the national economy:

• Flat metal structures of complex configuration are used in construction as wired elements of water and sewage communications, roofing, dewatering, window openings;
• In furniture production for the manufacture of boxes, boxes, cones;
• In the machine building industry, sheets are bent for spare parts, car bodies, trailers;
• For the production of electronic equipment;
• In the structure of ships, aircraft and rockets.

Varieties of flat metal bending machines

The bending machine has the same principle of operating torque, the difference is in the drive with which the force is applied:

• pneumatic;
• hydraulic;
• mechanical;
• electromechanical;
• Manual sheet bending.

The sheets are fed into the working area in manual or automatic mode, the setting of the sizes also differs in these two parameters.

Mechanical bending machine

The equipment is operated from the flywheel, which gives energy to turn the lever. When you press it, the part is bent at a specified angle, increasing the lever arm changes the required force.

Electromechanical equipment for bending sheets

It is an improved version of the mechanical variant. Energy is supplied to the lever by an electric motor. These machines are the most common among professionals due to convenient use and universal work. All bending processes occur in automatic mode, the operator only presses the button, presetting the parameters.

Many machines can withstand efforts of hundreds of kilograms, there are powerful ones that work with loads up to a ton. Electromechanical units are small in size, operate at a low noise level, bend a large number of parts in a short time, about several hundred elements per minute.

Design of the manual bending machine

Manual roller listogib contains in its design a lot of elements that ensure its work. Tin sheet, corrugated sheet or metal is fixed in working position with the help of a pressure beam. The shaping of the desired shape of the part is done by a special beam. The bending angle is set by the worker and differs in different machine models.

The protractor is made in the form of a disk with the cut divisions, allowing to establish the necessary size of curvature. The placement and movement of the material take place on the back table with the feed stop installed. The presser bar is brought into working position by means of the handle. The form of quality bending is established by the tensioning device of the main and bending beam. As an option, the brakes are installed on the swivel block with the wheels, the LGS moves on it. Manual bending is fixed in the working position before starting work.

Segment machine

In machine tools with a manual drive, the metal is bent due to the physical strength of the worker by pressing the pivot beam. Some models are made with a pedal. With the help of a hand-held machine, it is possible to process not too thick sheets and at small angles. The adaptation of this type is often found on a private farmstead for the manufacture of bent parts intended for household needs. The fact that the manual sheet does not contain rubbing and sliding elements makes the machine durable and durable. Folk craftsmen use the machine with the installed brackets on the supporting beams and the selected angular radius for creating complex parts.

Segmental hand-operated sheet-saw

It carries out contour bending of piece products from sheet steel, this procedure becomes possible due to the use of a set of standard segments. For effective work in it the clamping mechanism is put. There is a place for the installation of segments and a turning bending device. With the help of the hand lever, the beam is rotated to the preset angle size, if the power of the machine is large, then a foot drive is provided to transfer the force.

The production of manual sheet benders provides fastening of all structural units on the frame by the type of frame assembled from metal rolled products. To move was straight and not shifted to the side, attach the guide devices. As fixatives apply mechanical or magnetic devices. Uniform movement of the workpiece and mechanical parts is due to springs to compensate for vibration.

Segmental Sheet Material

The best is instrumental alloy steel grade XVG or 9XS, from which a quality machine is made. The manual leaf has a set of working segments for planting and bending the product. The seat is intended for fastening, and the working part is made taking into account the most common variants of bending. In manual machines, the height of the segment tool remains unchanged and for all types of equipment is the same.

Specifications

The operating parameters for all types of manual bending machines are the same and look like this:

• Produce bending of thin metal sheets up to one and a half meters;
• Bends non-ferrous metals and alloys up to 3 mm thick, up to 4 m long;
• The angle to which you can count when bending, in different models is from 140º to 180º;
• The manual roller sheet bending enables accurate bending of the installed semi-finished product with already existing bent edges and edges.

Manufacture of a bending machine for sheet steels with their own hands

To handle the bending of metal sheets in a private household, it is quite sufficient to make manual benders by hand. Drawings before the cutting of metal and assembly of the frame should be done necessarily. Sketches with applied dimensions will allow to design the machine so that the most hardy parts of the machine will serve to perceive the main load.

Purpose self-made bending machines

The choice of the bending equipment scheme depends on its purpose:

1. In the first case, the folding of the sheets occurs at 90 °. Almost all self-made machines provide for pressing the traverse more in its lower part, while moving it slightly forward.

1. The second option is a professional press for bending a metal sheet. This equipment operates on industrial sites, requires a lot of money and the work of a qualified specialist.
2. In the third variant, a long version of the machine is manufactured, in which the radius is set by changing the position of the feed rolls. These elements are multifunctional and are used for the manufacture of casings, connecting sections of wide pipelines, shells. Manual bending sheet from corrugated board is made with profiled rollers for broaching roofing materials, skates, ends, gutter elements.

The first option is most suitable for a standard bending device at home.

To determine the power and type of machine, its technical description should be studied:

• The machine effectively works with metal thickness of galvanized sheet up to 0.6 mm, copper - up to 1 mm, aluminum bends to 0.7 mm thick;
• The sheet must have a width of not more than 1 m;
• The inclination of the bent wall is not less than 120º;
• The maximum number of working cycles without interruption reaches 1200;
• Difficult to transfer work with non-standard parts and workpieces, they require restructuring.

Necessary materials

For the device of the bed, a channel is used with the height of No. 12. The bed cushion is made of a wooden beam of a certain size, depending on the design. To produce the right cheek, a sheet metal of 6-9 mm is suitable. For the construction of the pressure beam take corner number 60-80, on the axis of the punch armature is prepared with a diameter of 10 mm. Drawings of manual leafage provide for a punch of the second variant corner No. 80-100 or channel 10. The lever is made of reinforcement with a diameter of 10 mm.

For the design of the punch, it is better to use not a corner, but a channel, since the load on this element is distributed in such a way that the corner will bend in the middle part, which will lead to its premature wear. The additional shelf of the channel will take on the tensile force at work. The equipment with a punch from a channel maintains about 1200 bends, and the machine with the applied corner will break after 250 cycles.

Sequence of assembly of bending equipment

Manual sheet bending is assembled in the sequence provided in the description of the drawings. One after the other, a clamp consisting of a wrench, a heel and a screw is assembled, based on the corner 60, then the cheek is constructed. Next, make a base with bracket from the corner of No. 110, on which the presser beam is arranged. All the parts together with the punch on the axle are attached to the frame.

The pressure beam from below is milled after assembly by welding the entire structural unit. It is not recommended to use a grinder to grind an even surface or to drill with a file. The clamping beam should be further reinforced with rolled metal, and the length should be 5 cm shorter than the base.

At the ends of the clamp make the stoppers from the scraps of the corner. The pressing parts relating to the workpiece material are milled. The center of the shelf on the brackets is equipped with a hole 8 mm in diameter. Drawings of manual leafage provide that the punch is made shorter than the pressing by 100 mm. The lever is made of reinforcement and welded to the punch by welding. To manufacture the cheeks, take a steel sheet and drill holes in it 1 cm to install the axes. On the edge, a facet with a depth of 0.6 cm is taken from the ends, its length is 3.2 cm. When joining by welding axes, it should be taken into account that the direction of their and the edges must coincide.

Safety precautions

The machine belongs to equipment with a high degree of danger, so compliance with the rules should be in the first place. Before you start to study the instruction, determine the technological sequence of manufacturing the product and clearly follow it. A homemade machine or production machine, work should begin with the necessary actions:

• Put on work clothes and check the presence of hanging and protruding parts, it should not have torn off buttons, lightning inoperations, cuffs buttoned;
• Check the condition of the working constructives and their fixing on the stand; all faults are eliminated before the machine is started;
• For work the distance from the machine is 1 meter, the passage to the equipment can not be blocked by foreign objects;
• At the workplace there should be sufficient lighting, in the twilight it is forbidden to work;
• For each machine there are permissible parameters of the thickness of the metal, it is impossible to bend blanks of more specified sizes and specifications;
• It is strictly forbidden to leave the workplace and be absent on it when the machine is turned on.

Conclusion

With the mass production of bent products in the production process, there are a lot of waste that household owners of private houses use to equip the site and the building itself. The made bending machine with its own hands will be a real help for the craftsmen and their neighbors. It is not difficult to construct and assemble such a machine, the main thing is that it will become a real find for home construction.