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Our company offers professional and reliable machine tool repair and scraping services, primarily serving clients in Dalian, Shenyang, and other cities in Liaoning Province. We have built a strong reputation for quality work and customer satisfaction. Below is an in-depth explanation of our machine tool repair and scraping methods:
Rough scraping is the first step when the workpiece surface is rough, has deep machining marks, or is severely rusted, uneven, or distorted, with a scraping allowance exceeding 0.005mm. This process uses a long scraper with a stroke length between 10mm and 15mm, and the knife marks are wider (about 10mm). The scraping strokes are smooth, and the same area is not repeated. Once the major imperfections are removed, high points can be ground and scraped. When the surface shows 4 to 6 points per 25mm × 25mm area, it's time to move on to fine scraping.
Fine scraping involves removing high spots left after rough scraping. This method uses shorter strokes, with a knife mark width of approximately 6mm and a length of 5mm to 10mm. The marking points are scattered quickly. During fine scraping, the direction should remain consistent, and the second pass should be done at a 45° or 60° angle to the first. When the average number of grinding points reaches 10 to 14 per 25mm × 25mm, the fine scraping process can be completed.
After fine scraping comes the final stage—precision scraping. This step uses a small or curved-edge scraper, with a knife mark width of about 4mm. The average number of research points should be 20 to 25 per 25mm × 25mm area. This level of precision is ideal for inspecting tools, precision rails, and closely contacting surfaces.
In addition to the main scraping process, we also perform scratching, which serves both aesthetic and functional purposes. Scratching helps retain lubricating oil and improves the appearance of the surface. Common patterns include diagonal lines, swallow shapes, and fish scale designs. Observing the integrity and wear of these patterns can also help determine the degree of surface degradation over time.
For more information about our Dalian machine tool repair and scraping services, feel free to contact Manager Zhang at our Dalian hotline.
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