Common problems in the process of sheet metal shell processing include:

1. Material selection issue: Common materials for sheet metal shells include iron, aluminum, stainless steel, etc. Choosing the appropriate material is crucial for the quality and service life of the shell. If the selected material is not suitable, it may lead to problems such as insufficient strength of the shell and easy rusting.

2. Design issues: The design of the casing needs to consider factors such as usage environment and external force loading. If the design is not reasonable, it may result in the casing not meeting the usage requirements or having a short lifespan.

3. Processing accuracy issue: Sheet Metal Processing requires high processing accuracy. If there are significant errors during the processing, it may lead to poor assembly of the shell or non-compliance with design requirements.

4. Surface treatment issues: The surface treatment of the shell includes spraying, electroplating, etc. If not handled properly, it may cause oxidation, paint peeling, and other phenomena on the surface of the shell.

5. Sales issues: The sales and after-sales service of the shell are also important issues. If there is poor communication or inadequate after-sales service during the sales process, it may lead to customers having doubts about the quality and user experience of the casing.

6. Processing technology issues: There are various sheet metal processing techniques, including cutting, stamping, bending, welding, etc. If the appropriate process is not selected during the manufacturing process, it may lead to inaccurate shape of the shell, insufficient structural strength, and other problems.

7. Bending deformation problem: The shell often needs to be bent during the processing. If the bending angle or position is not accurate, it may cause the shell to deform or even break.

8. Welding issues: The commonly used welding methods in shell processing include laser welding, arc welding, etc. If temperature control and welding quality inspection are not paid attention to during the welding process, it may lead to cracks or insufficient welding strength in the weld seam.

9. Equipment issue: Sheet metal processing requires the use of a series of equipment, such as shearing machines, punching machines, bending machines, etc. If the equipment is used improperly or of poor quality, it may lead to problems during the processing.

10. Quality inspection issue: The shell needs to undergo quality inspection after processing, including dimensions, appearance, strength, and other aspects. If the quality inspection is not strict or the quality inspection standards are not scientific, it may lead to unstable shell quality.