Near the end of the year, in order to strengthen the safety precautions for the jewellery business establishments, Chaoyang police yesterday carried out security inspections on the district’s independent jewellery stores and shopping malls, malls, and supermarket jewellery counters. This security inspection puts forward new requirements for the jewelry business establishments. In addition to the security, the merchants should also be equipped with guards at the main entrances and exits around the jewellery business area; the sales staff must have 1 person wearing red armbands and other obvious signs, and jewelry. Jewelry counters should install video surveillance devices in the business counter area and connect with the central control room of the stores and supermarkets that provide the business premises. In addition, the jewelry counters should be installed in the business counters and the central control office of the stores and supermarkets providing business premises. The connected emergency alarm device should immediately send an alarm signal upon triggering. Sheet metal fabrication processing is formed by laser cutting or stamping process, shear and bending, bending, bending, welding, riveting. The Sheet metal fabrication used are cold-rolled plate (SPCC), hot-rolled plate, galvanized plate (SHCC) (SECC, SGCC), copper (CU) brass, copper, beryllium copper, aluminum (5052), stainless steel. Sheet metal fabrication processing steps: according to the parts drawing (3D) expanded into a plan (2D), laser cutting or die stamping shape, CNC punching each bending part, should pay attention to the direction of the burr of the workpiece. Then the students are welded or riveted (some). Surface treatment after processing: electroplating, passivation, sand blasting (powder), anode treatment. Products are generally made for the connection and the outer cover. Applications in robotics, drone, communications, medical devices, industrial automation equipment. Sheet Metal Fabrication,Oem Sheet Metal Fabrication,Sheet Metal Forming,Sheet Metal Bending Hong Kong RYH CO., LTD , https://www.cncmachiningpart.com