Gantry Milling Machine Guideway Repair: Machine tool guideways are mostly made of steel or cast iron. Scratches on these guideways should be repaired; otherwise, the scratches will worsen and may even affect the machine's operation. During long-term use, machine tool guideways and other friction pairs experience varying degrees of wear due to friction between the contact surfaces. Severe wear can affect the machine's machining accuracy and production efficiency. Repairing worn parts of the machine tool and other components typically involves methods such as metal plate and polymer material inlaying or replacement. This requires extensive precision machining and often manual scraping of the machined surfaces, resulting in numerous steps and a long repair time.
Solution: Using internationally advanced polymer 2211F metal repair material to repair scratches on gantry milling machine guideways allows for repair within a few hours, enabling the machine to be put back into service. Practice has proven that this method is simple to operate, saves time, provides high-quality repairs, and is cost-effective. Utilizing its unique adhesive strength, excellent compressive strength, and oil and wear resistance, it provides a long-lasting protective layer for components. This effectively solves problems with large, non-disassembly equipment that traditional repair methods cannot address, improving equipment performance, optimizing component fit clearances, maximizing normal production operation, saving customers significant time and money, and providing a long-term guarantee for the normal operation of enterprise equipment.
Repair Principle: Polymer composite materials are made by combining polymers, ultrafine metal or ceramic powders, fibers, etc., as base materials, under the action of curing agents and curing accelerators. The various materials complement each other's strengths, producing a synergistic effect, making the composite material's overall performance superior to the original constituent materials. It possesses extremely strong adhesive strength, mechanical properties, and chemical corrosion resistance, thus being widely used in the repair of mechanical wear, scratches, dents, cracks, leaks, and casting sand holes in metal equipment, as well as for chemical corrosion protection and repair of various chemical storage tanks, reaction vessels, and pipelines.
Repair Process:
Use an oxy-acetylene flame to heat the scratched area (control the temperature to avoid surface annealing) to remove any oil that has seeped into the metal surface over time, until no more sparks are generated.
Use an angle grinder to treat the scratched area, grinding to a depth of at least 1 mm, and grind grooves along the guide rail, preferably dovetail grooves. Drill deeper holes at both ends of the scratch to alter the stress distribution.
Clean the surface thoroughly with cotton wool soaked in acetone or anhydrous ethanol.
Apply a thin, even layer of 2211F to the scratched surface; the first layer should be thin, even, and completely cover the scratched area to ensure best adhesion between the material and the metal surface. Then, apply the material to the entire repair area and press repeatedly to ensure the material is fully packed and reaches the required thickness, slightly higher than the guide rail surface.
The material requires 24 hours to fully achieve its properties at 24°C. To save time, a halogen tungsten lamp can be used to increase the temperature. For every 11°C increase in temperature, the curing time will be halved. The optimal curing temperature is 70°C.
After the material has cured, use a fine grinding stone or scraper to smooth out any material protruding from the guide rail surface. The construction is now complete.
