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Apr 24, 2022
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Bending machine from bicycle parts

Decorative elements of cold forging are quite expensive in relation to the material that is spent on their manufacture. Therefore, if you do them yourself, then the savings are significant. But to bend such decor, you need a machine, which the average man in the street does not have. If you have a free weekend, then you can assemble it from the available parts.

Bending machine from bicycle parts

Materials:

  • Steel plate 10, 20 mm;
  • corner 50 mm;
  • bearings of different diameters;
  • pipes 50, 70 mm;
  • profile pipes 50, 40 mm;
  • roller chain;
  • star;
  • steel round timber 20 mm, 70 mm;
  • hairpin M16-M20.

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Machine manufacturing process

Cut out a disk from a thick steel plate. Then we wind a roller chain on it, and weld it.

Bending machine from bicycle parts
Bending machine from bicycle parts

After that, we weld a shaft segment into the center of the disk to fit the bearing.

Bending machine from bicycle parts

Now you need to do the machine bed. It is made from thick sheet steel. A ring from a pipe is welded onto the frame, into which the bearing will be seated.

Bending machine from bicycle parts

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Bending machine from bicycle parts

Two profile pipes with holes along the edges are welded to the base transversely for further fastening to the table. Thus, the disk with the shaft can be installed in a bearing pressed into the frame ring.

Bending machine from bicycle parts

Now we take a piece of pipe with a diameter of 40-50 mm, and press three bearings into it. We insert a shaft into them, to which an asterisk is welded. This design is set so that the sprocket has a hook with rollers on the disk.

Bending machine from bicycle parts
Bending machine from bicycle parts

After that, the node must be welded to the frame.

Bending machine from bicycle parts

To prevent the sprocket from rising up under load, a bent bracket should be welded with a pipe ring at the end into which the bearing is pressed. The result is a clamp that is put on the shaft with an asterisk.

Bending machine from bicycle parts

The bracket itself is screwed to the frame.

Bending machine from bicycle parts

Next, you need to deal with the push roller. For its fastening to the frame, two segments of the corner are welded.

Bending machine from bicycle parts

Next, we take a piece of a profile pipe, and make a roller pusher guide with a cut-out wall out of it, as shown in the example. From the side of the cutout, a plug with a hole for the bolt is welded to the guide.

Bending machine from bicycle parts
Bending machine from bicycle parts

Two eyes are made from the strip, with the help of which a roller is assembled from three bearings.

Bending machine from bicycle parts

This assembly is welded to the pusher from a profile pipe, which can be included in a previously made guide.

Next, we take a stud with a powerful thread, and fasten a plug for the pusher at its end with nuts. In order for the pin to turn, the hole in the plug is made slightly larger than its diameter. The end nut is welded on. Thus, the hairpin will not fall out when wrapping.

Bending machine from bicycle parts

After that, the plug is welded into the pusher with the roller. A pin with a pusher and a roller is placed in the guide. On the first we wind the nut, and weld it to the guide cap. Now, when the mechanism rotates, the roller will be able to move forward. On the edge of the stud, a handle is made from an elongated nut. We just screw it on and drill a through hole. Then we insert a handle into it.

Bending machine from bicycle parts

The finished mechanism is welded onto the racks from the corner. We check all the gaps so that the roller does not rub against the disk with the chain.

A grip for the strip is cut out of a cylindrical blank.

Bending machine from bicycle parts

Bending machine from bicycle parts
Bending machine from bicycle parts

A pair of longitudinal and a pair of transverse holes are made in it. In the latter, a thread is cut for the strip clamps.

Bending machine from bicycle parts

The grip is screwed into the center of the machine disc.

Bending machine from bicycle parts

A narrow spiral of a thick strip is welded around it.

Bending machine from bicycle parts

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Bending machine from bicycle parts

You also need to weld the handle onto the sprocket shaft.

Bending machine from bicycle parts

As a result, the machine can first bend the strip by inserting it into the grip. So that it does not fall out, we press the studs.

Bending machine from bicycle parts

After the first bend, the strip falls lower, and bends with an emphasis already into a large spiral.

Bending machine from bicycle parts
Bending machine from bicycle parts

Watch the video

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