This article will focus on a home-made machine for bending profile pipes.
For the construction of such a construction, the author of the TeraFox YouTube channel first prepared the necessary material, namely the sections of the profile pipe that he had previously cleaned from having already settled on the corrosion surface, metal plates of 6mm, 8mm and 2 mm strips would also be used.
By welding magnets, fixing the professional pipe, we proceed to welding, this will be the basis of today's machine.
In addition, in the center, it is necessary to position the racks and the supporting part from the plate. Since the machine is being built with a large margin of safety, it was decided to make the racks from two segments on each side. At the edges there are also pipes, but a little larger, which will play a guiding role in this design.
Two plates in which we need to drill a pair of holes can be tacked by welding so as not to do the same job twice.
First, with a small diameter, and then with the sixteenth drill, we easily drill the necessary holes.
Now we place them on the racks along the plate and it remains only to weld them.
The first part of the machine is ready, you can start manufacturing the second. We fold the blanks as it should look in the end, but specifically in this case, for proper joining, all 4 external segments had to be cut at the ends at an angle of 45 degrees.
Next, welding and again the plate in the center for emphasis.
Along the perimeter of the 2 sides, it is necessary to make markings for the holes, there will be 20 pieces. Such a number of holes will significantly weaken this part of the structure, therefore, to prevent possible deformation under loads, strips of "eight" will be provided, which must be welded on the sides. Now it remains to drill 20 holes with a diameter of 16 mm. The author recalls with horror all these manipulations with a drill in his hands. How much easier it was even morally to approach such tasks, having a good drilling machine in the workshop.
In this part of the structure, a pair of guides is not enough, but before that, to minimize the gap between the walls, it remains to weld a metal strip on each side.
All manipulations with this part of the machine are completed and it is time to reunite the two parts.
The author bought bearings in advance and turned to the turner. He machined 3 shafts and 9 rings.
Next, we collect the rings on the shaft in a certain sequence and put on the bearings.
Now you need to place all the mounted nodes in their places in order to make another yet missing part.
And here is the detail itself:
The master also prepared a professional pipe and a bolt, for which a hole is provided in the end of the main shaft.
Since the screwdriver chuck has a smaller diameter, the cap must be cut off.
Now you can clamp the pin into the cartridge and get the desired result.
We will use a small jack of 3 tons.
Pipe in place, restrictive rings exposed.
Everything works, that's just the width of the room does not allow the profile pipe to move to the end.
We move to another table, placing the machine on the diagonal of the workshop.
The screwdriver is not young, so his work was short-lived. A drill will help us solve the same question.
Everything went fine until the pipe hit the ceiling.
The author decided not to take out the entire structure onto the street, but simply moved to the floor. As a result, the pin in the cartridge began to scroll due to the increasing effort. Therefore, the author welded an elongated nut, put on a wrench, and here for sure.
We rotate the ring, mark 4 points of the correct arrangement of the segments and weld the whole thing.
Now you need to drill a through hole in the shaft.
Now it remains only to put on the steering wheel and fix it with a bolt.
The machine itself is ready, there are absolutely no assembly difficulties, with the exception of turning to the services of a turner.
Further, the author had to disassemble and paint everything. Well, according to the logic of what is happening, it remains to conduct tests. For this, the author acquired several two-meter sections.
Profile pipe 20 to 40 in rolling without much effort. The master gradually gives the load, swinging the jack, and the rectangular pipe begins to take the form of a parabola.
But here the author suffered the same fate because of the low ceiling, and it was decided to pull the machine weighing more than 50 kg, taking into account the charged pipe in it, into the street.
Well, with the first test, the machine coped easily and simply, with a regional arrangement of shafts this was the maximum result, because there was simply nowhere to raise higher.
Not a good idea, you say, a square pipe of 60 by 60, the author is going to demonstrate whether the machine is able to overcome not a weak size. This may not be applicable in real life, but the challenge is thrown, the wall thickness of this pipe is 2 mm.
From the very beginning, not a weak resistance was felt, the jack was reluctant to pump, 3 tons for this pipe was not enough.
Nevertheless, the pipe was slowly deformed and the result was visible that the machine is not easy, but copes with the task.
The author admits that bending took place in several approaches, hands after such stress were tired, I had to rest.
And here is what can be seen as a result:
With this amount of metal, there is simply nowhere to go, except to bend into the pipe and protrude outside. As a result, we get a relief surface that is not attractive. It was decided to stop on this, because there will simply be no strength left for the subsequent movement.
We shift the bearings with the shaft close to the center, for the subsequent demonstration of the maximum diameter that can be produced on this machine. Half-inch pipe, wall thickness 3 mm, a segment of a little more than a meter.
The restrictive rings are designed for both square pipes and round pipes, the only thing: the bolts holding the rings slightly cling to the pipe walls with a hat. By the time of the test, the author did not find the hexagon set screws in place, but later ordered them with aliexpress (the link in the description is under the author’s original video).
Neither the master nor the machine felt much tension. After the square pipe, the round pipe went light. You can see the maximum resulting diameter:
Well, the last, rectangular pipe, placed on the rib, 2 mm wall.
It feels a little harder than the previous one, but one can handle it.
The author did not try to tighten the screw strongly, in order to avoid deformation of the walls, as in the 60th pipe. On this, all tests are completed, the author placed the result on a workbench for clarity.
It is also worth noting that the cost is not 3 rubles, so think carefully whether you need it or not. If you are interested in this design, the drawings can be found in the original video of the author by clicking on the link SOURCE. Thank you for attention. See you soon!