Gantry milling machine guide rails and other friction pairs, during long-term use, due to varying degrees of friction between the two contact surfaces, the surfaces of the friction pairs will suffer varying degrees of wear, which in severe cases will affect the processing of the machine tool. Accuracy and productivity. The guide rails of gantry milling machines are mostly made of steel or cast iron. When scratches occur, they should be repaired, otherwise the scratches will expand and the processing will be affected.
To repair machine tools and other worn parts, methods such as inlaying or replacing metal plates and polymer materials are usually used. This not only requires a large amount of precise processing and manufacturing, but also often requires manual scraping of the processed surface. , the repair work requires many steps and the construction period is long. If it needs to be repaired quickly, polymer materials can be used to repair it.
Polymer composite materials are materials made of polymers, metal or ceramic ultrafine powders, fibers, etc. as base materials and compounded under the action of curing agents and curing accelerators. Various materials complement each other in terms of performance, creating a synergistic effect, making the overall performance of composite materials better than the original component materials. It has extremely strong adhesion, mechanical properties, and chemical corrosion resistance, so it is widely used to repair mechanical wear, scratches, pits, cracks, leaks, casting blisters, etc. on metal equipment as well as various chemical storage tanks. , chemical anti-corrosion protection and repair of reaction tanks and pipelines.
Gantry milling machine guide rail repair process procedures:
1. Bake the scratched part with an oxygen-acetylene flame (control the temperature to avoid surface annealing), and bake the oil that has penetrated the metal surface all year round Take it out and bake until there are no sparks flying.
2. Use an angle grinder to surface-treat the scratched area to a depth of more than 1 mm, and grind a groove along the guide rail, preferably a dovetail groove (as shown in the picture). Deepen the holes at both ends of the scratch to change the stress situation.
3. Use absorbent cotton dipped in acetone or absolute ethanol to clean the surface.
4. Apply evenly mixed 2211F to the scratched surface; the first layer should be thin, even and completely cover the scratched surface to ensure the best bonding between the material and the metal surface, and then apply the material Apply to the entire repair area and press repeatedly to ensure that the material is filled in and reaches the required thickness, making it slightly higher than the surface of the guide rail.
5. It takes 24 hours for the material to fully achieve all properties at 24°C. In order to save time, you can increase the temperature through a tungsten halogen lamp. For every 11°C increase in temperature, the curing time will be shortened by half. Best Curing temperature is 70℃.
6. After the material solidifies, use a fine grindstone or scraper to repair and smooth the material that is higher than the surface of the guide rail, and the construction is completed.
This repair method is simple to operate, saves time, has good repair quality and is low cost. Utilizing its unique adhesion, excellent compressive strength, oil resistance, and wear resistance, it can provide a long-term protective layer for components, and can effectively solve the problems that cannot be solved by traditional maintenance methods for large equipment that cannot be disassembled. The performance of the equipment has been improved, the fitting clearance of the components has been improved, and the normal operation of the gantry milling machine production has been ensured to the greatest extent, saving customers a lot of time and money and allowing the equipment to have a long running time.