On-site repair steps for stem strain
1 Use a trowel to remove the burrs from the strained area; use a flat spatula to machine to a depth of about 1 mm, then sand with an abrasive cloth or an angle grinder to create a new metal surface.
2 Clean the surface with TL-700 metal cleaner to make the surface to be repaired free of oil, dust and dirt.
3 Apply abrasion resistant repair agent.
4 details trimming.
Preparation and coating process of wear-resistant repair agent
1 Prepare the repair agent at a volume ratio of 3.8:1;
2 Apply the adhesive to the surface of the strained surface. The first pass should be applied as little as possible, from the top to the bottom, and no air bubbles are allowed.
3 After the first pass of glue for 1h (that is, after the initial curing of the adhesive), re-adjust the repair agent as required, and apply for the second pass, which is required to be 1~2mm higher than the original size;
4 After natural curing for 1h, heat it with 80~100°C iodine tungsten lamp for 3h.
Detail finishing process requirements
1 Use a boring tool, scraper and abrasive cloth to remove the adhesive above the original size. Always measure it during operation. Do not make the adhesive layer lower than the original size, and reserve 0.5mm as the finishing amount.
2 When the size reaches the finishing amount, trim it with a pre-machined grinding tire (80 mesh sand cloth);
3 When the size is higher than the original size of 0.2mm, replace the diamond and grind it to the actual dimensional accuracy.
Precautions
Due to the on-site repair, in order to ensure the quality of repair, the dust and oil stains around the repair (especially the upper part) must be cleaned up; if there are defects (such as small air holes) after repair, the glue should be filled, the operation process is the same as above.