Industrial aluminum extrusion processing should pay attention to the problems and methods
[China Aluminum Network] Aluminum alloy stamping because the material is relatively soft relative to the metal iron, expensive, easy to break and some aluminum alloy products still need follow-up processing, such as drawing, anodizing, etc., in the stamping production is particularly prone to top injury Scratches, special attention should be paid to the following points in the mold manufacturing:
1. For punching holes as far as possible without affecting the number of projects, the punching of holes is as follows, and even for a product with a large number of punching holes, it may be considered that one more project is to be performed and the punching holes are arranged behind the punching.
2. The aluminum material is softer and the mold is easier to block material. Therefore, when the mold is placed in the clearance, a gap of 10% of the material thickness of the two sides should be placed. The straight-to-deep position of the blade is suitable for 2mm, and the taper is 0.8-1°.
3, bending forming, due to the aluminum material in the bending easily produce aluminum shavings, will cause points of injury? Indentation, aluminum raw materials need to be posted PE film, in the case of the roller and the plating, the molding block to polish the hard chromium plating Better.
4, for the need for anode after processing of stamping parts, if flattened? Flattening process 180 °, the product can not be fully pressed together, fully pressed will produce vomiting acid phenomenon, the need to stay in the 0.2-0.3MM seam, so that the smooth acid Flow out in time, so limit blocks must be made on this process and the calibration die above the mold.
5, due to aluminum material is more brittle, easy to crack, especially in the case of anti-folding, so try not to do pressure line, even if you want to do, but also to make the pressure line a little wider, playing a little lighter.
6ã€All aluminum parts require cutting with slow thread cutting to prevent burrs and blanking phenomenon, aluminum parts are prone to high temperature, so punch hardness requirements above 60 °, at least with SKD11 material above, there is no difference between D2 Quality punch.
Aluminum material is soft, so it is easy to produce top-end injury, pressure injury, scratching and deformation during stamping production. In addition to the requirements on the mold, the following points should be made during stamping production:
1. If you want to punch aluminum parts well to reduce the defective rate, you must first do 5S, especially cleaning, including molds, punching table, assembly lines and packaging materials must be sharp and clean without any sharp debris. The mold must be cleaned up and down without impurities.
2, found that product burr must be promptly sent to the mold repair and follow the reminder to the result.
3, aluminum parts are more prone to heat, and backlog together and become hard, so in the punching under the material required to apply a little pressure on the material to pull oil (can be heat, but also smooth dredge blanking) and then stamping.
4, punching more products need to do a bit to clean up the surface of the mold, so that the mold? Product is always clean and free of debris, reduce top injuries, found that the top injury must find the mold top problem and solve the problem before they can continue produce.
5. Pushing the mold to push the block will produce aluminum shavings, so the aluminum chips on the push block must be cleaned after the push block is produced every day.
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