Sheet metal works, machinery equiments manufacture

Today is inspection day.
Projects:  Metal box

We  inspect about 500 pcs of metal boxes.  It is going to be defected if  it is 

• black track by welding  [ it can be acid wash again to remove it .]
•  surface is uneven larger than 1 mm
• The edge line is not straight 

Defects would be reproduced. If it still not QC passed, it would be droped.

qualified-metal-box

• Sheet metal working steps [caption id="attachment_48" align="alignnone" width="480" caption="sheet metal working factory"][/caption] What is sheet metal processing? It is working on the metal (Steel, stainless steel, aluminum, brass) sheet/board/plate. Steps on inquiry: 1．Discuss There are dozens of ways in metal processing. To meet client’s demands, we need to discuss every details on specific case......