Why Are My Aluminum Plates Warping After Extrusion and Cutting?

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    Aluminum Plate
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Discussion Overview

The discussion centers on the warping of aluminum plates after extrusion and cutting, specifically addressing the potential causes of this warping and the implications for quality control. The scope includes practical concerns related to manufacturing processes and specifications.

Discussion Character

  • Debate/contested, Technical explanation

Main Points Raised

  • One participant describes the dimensions and warping of extruded aluminum plates, noting significant curvature on both the 3" and 7" sides.
  • Another participant questions the terminology used, asking for clarification between "wrapped" and "warped."
  • A subsequent reply clarifies that "wrap" refers to curvature on the surfaces of the plates.
  • Another participant raises concerns about the specifications provided to the vendor, suggesting that the lack of written specifications may complicate any claims for replacement or repair.
  • This participant also implies that the timing of the damage may be relevant to determining responsibility.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the causes of the warping, and there are differing views on the importance of specifications and the timing of damage. The discussion remains unresolved regarding the specific source of the warping.

Contextual Notes

Limitations include potential missing specifications in the purchase order and the ambiguity in terminology regarding "wrap" versus "warp." The discussion does not clarify the exact processes that may have led to the warping.

XiangYan
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Hi, I get a whole bunch of extruded Al plates. Each of them is about 7" long by 3" wide and 0.08" in thickness. They are extruded parts and cut into 7" long on each pc.
However they are coming out wrapped, not substantial but quite a amount that is out of our tolerance. They are wrapped close to half mm on the 3" side and even worse (I guess 1mm~2mm) on the 7" side.

I wonder if this warp is introduced during the extrusion, or during cutting. I looked at typical 8020 parts, they look perfectly flat.


Thanks!
 
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Are your parts wrapped or warped? There is a difference.
 
Sorry, maybe a typo, I mean wrap, means a curvature on the surfaces.
 
warp as in 'not flat' ... I would worry more about what specs did you give the vendor on the Purchase Order. Without something in writing it will be hard to get the vendor to replace/redo/repair the work. I do not think it matters how the parts were damaged, unless it happened after you received them.
 

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