Aluminum alloy profiles are lighter and softer than steel, and stamping parts are easy to break. In addition, some aluminum alloy products require subsequent surface treatments such as wire drawing and anodizing.
Aluminum profiles are particularly prone to top damage and scratches in stamping production, so when manufacturing stamping dies, we must pay attention to the following issues:
- 1. The aluminum profile is soft and the Mold is easy to block. Therefore, when designing the mold placement gap, the gap should be placed at 10% of the thickness of the double material. The straight line depth of the knife edge is preferably 2MM, and the taper is 0.8-1°.
- 2. When bending and forming, aluminum chips are prone to be generated during bending, causing scratches and dents. Aluminum profiles should be coated with PE film. For rollers and electroplating, the modules are best polished with hard chrome.
- 3. Aluminum is brittle and fragile. Especially in the case of reverse hemming, if crimping is needed, crimping is not necessary. In addition, try to make the lines wider and shallower.
- 4. Used for stamping that requires anodizing.
If there is a 180° flattening and flattening process, the product may not be completely compressed, and complete compression will cause acid oozing. A joint of 0.2-0.3MM is required to allow the acid to flow out smoothly and in time. Therefore, it is necessary to create a limit block and calibrate it with a mold during this process. - 5. Without affecting the number of projects, try to punch holes in the hole in the following project. Even if your product has a lot of impact, you can consider running multiple projects and press the impact to the back.
- 6. All aluminum trimmings should be cut with slow wire to prevent burrs and blanking. Because aluminum parts are prone to high temperatures, the hardness of the punch must be at least SKD11 and above 60°, and there is no NO D2 equivalent.
In addition to the above six mold requirements, stamping production must also do the following:
- 1. Aluminum parts are easy to heat up and solidify together. Therefore, when stamping and unloading, pressure must be applied to the material to push the stamping in order to dissipate heat and smoothly dredge the blank.
- 2. In order to clean the surface of the mold, more punches are needed to clean the product. Molds and products are kept clean, free from debris and reduce upper damage. It turns out that the upper injury needs to be solved before the mold problem can be solved.
- 3. Flattening the mold push block will produce aluminum chips, so after the push block is produced, the aluminum chips under the push block should be cleaned every day.
4. If the product has large burrs, it should be sent to the mold for repair.
If the above points can be achieved, we believe that the yield rate of aluminum stamping parts production will be significantly improved, the production cost will be reduced, and the efficiency will be improved.
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