Today I need to weld platics to round loops - these are pads, platforms, you can say this is a gasket between the loop and the product. I will share my method of this welding job
Plates are welded on different sides to each hinge segment. We need to weld them evenly, and with a gap relative to each other, so that the hinges work as they should.
I cut the pads from 40 strips with a thickness of 4 mm. The length of the pad is equal to the length of each loop segment, in our case it is 55 mm.
I need to weld the pads to 9 loops. A small order has appeared, it is necessary to make 3 upper boards on the KAMAZ trailer as workers. They should open upward.
We grab one of the two platforms to a flat metal surface. We take an electrode of 3 mm, its thickness with coating is -5 mm, we apply it to the edge of the plastic.
We also apply the second plate with the edge to the continuation of the electrode, and in this position we grab the second plate. We got a perfectly even gap between the platforms. The platforms are now stationary, easy to work on.
We measure the thickness of the loop. My hinges are 25 mm thick. We also know that the gap between the pads is 5 mm. Why do we need this, we look further.
From the thickness of the loop, minus the gap between the pads, and divide this value by 2. We get the number 10mm, it is at this distance that the loops should go to our sites.
Mark a line along the plastic at a distance of 10 mm from its edge. The markings should be clearly visible. I always use a blue pencil for metal surfaces.
Now we need something small in size, but with a good weight, so that this thing cannot be moved with a light touch. There was a piece of brick at hand, it would be fine.
I put the brick on the plate, press the loop to its side surface so that our mark with a blue pencil is at the level of the opposite surface of the loop. We look from above and set everything exactly.
Now we make tack on the loops to the platforms. In total, you need to make 4 potholders, 2 for each site.
Here are already stitched loops to the platycs. The product is assembled on potholders, now you can scald. All loops with platics are stuck to the common surface. We can take this general structure and put it at an angle for the convenience of welding, so that the slag does not flow into the arc.
Welded, it will also be convenient for us to clean all the seams with a grinder, because the loops are stuck and will not move from the effort of the disk. We immediately weld and clean all the loops.
Now you can cut off all the tacks from the metal. We cut off, turn over the hinges with platics and now weld all the internal seams.
Friends, the article did not fit all the information and various little things on this method, so watch the video that I shot for you.