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Pasting process of soft tape on the guide rail of CNC machine tool

Posted by: Chris Na 2021-05-26 Comments Off on Pasting process of soft tape on the guide rail of CNC machine tool

Guide rail soft tape pasting process (applicable to machine tool maintenance, refer to the implementation for use on the product)
Preparation: The bonding site should be clean and dust-free, the ambient temperature should be 10-40 ℃, and the relative humidity should be less than 75%. The soft belt is treated with single-sided sodium naphthalene, the dark brown side is the bonding surface, and the blue-green side is the working surface. The leftover soft tape and special glue should be kept away from moisture and light. In order to improve the bonding strength, the surface roughness of the bonding surface of the metal guide rail should be Ra12.5~25μm (finish 3~4); the matching guide rail should be slightly wider than the soft belt guide, and the surface roughness should be Ra0.8~1.6μm (Finish 7~8).
Cutting: The cutting size of the soft tape can be adjusted according to the actual size of the metal guide rail bonding surface. The width can be placed 2~4mm on one side to prevent slippage when pasting; the length can be placed on one side of 20~60mm for easy pasting. Tighten at both ends.
Cleaning: Before bonding, you need to remove rust and oil on the bonding surface of the metal rail. You can use emery cloth, sandpaper or wire brush to remove the rust spots and impurities, then wipe it with acetone and dry it; if the old machine tool is seriously oily, you can use NaOH first Wash with lye and then scrub with acetone; if possible, sandblasting can also be done on the bonding surface of the metal rail. At the same time, scrub the dark brown bonding surface of the soft tape with acetone, and dry it for later use.
Glue preparation: The special glue must be prepared and used, weighed and mixed according to the weight ratio of component A/component B = 1/1, and the glue can be applied after mixing (see the bottle sticker for details).
Glue: “Toothed scraper” or 1mm thick bakelite can be used for gluing. The special glue can be applied longitudinally on the metal guide rail and laterally on the soft belt. The coating should be uniform. The glue layer should not be too thin or too thick. The amount of glue used can generally be controlled at about 700g/m², and the thickness of the glue layer is appropriate. Control in the range of 0.08~0.12mm.
Paste: When the soft tape is just pasted on the metal guide rail, it needs to be squirmed back and forth to make full contact; squeeze from the center of the length of the soft tape to both sides by hand or with a tool to drive away air bubbles; for large and medium-sized machine tools, BOPP can be used to seal the box With paste positioning.
Curing: Curing is carried out at room temperature, curing time: 24 hours, curing pressure: 0.06~0.1MPa, the pressure must be uniform, and the weight of the machine tool table itself can be used to reverse the pressure on the bed guide rail, and add weight if necessary. The product can be used in batches, and the pressure iron can also be customized as a pressure part. In order to avoid the squeezed out glue sticking to the bed guide rail, a layer of oil-sealing paper or a layer of engine oil can be spread on the bed guide rail surface in advance.
Processing: After curing, push the worktable in the direction of the guide rail first, then lift it and turn it over to remove the remaining glue, and cut the soft tape along the direction of the bonding surface of the metal guide rail and chamfer the process margin. The soft belt has good scraping performance. It can be ground, milled or manually scraped to the required accuracy. During machining, it must be fully cooled by flooding coolant and the feed amount should be small; with scraping, it can be carried out according to the usual scraping process, contact The surface evenly reaches 70%. The method of opening the oil hole and oil groove of the soft belt is the same as that of the metal guide, but it is recommended that the oil groove does not penetrate the soft belt. The depth of the oil groove can be 1/2 to 2/3 of the thickness of the soft belt, and the oil groove is at least 6mm away from the edge of the soft belt.

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