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.szcncmachining.com
Recently, Ankai Automobile officially delivered 20 double-decker buses that were customized for the Hefei Bus Group. The 20 double-decker buses that were put into operation were mainly used to replace some of the original BRT Line 1 vehicles, and they were transferred to and from the Binhu New Area of ​​Hefei. Between the old town. 
According to reports, Ankai double-decker buses are all equipped with intelligent public transport systems, and some vehicles are equipped with air-conditioning. All vehicles use State III engine, power steering device, automatic transmission, the vehicle uses CAN bus, air suspension, imported airbags, low chassis door configuration to facilitate passengers up and down, each car has 65 soft seat cushions, in use in the future Car TVs will be assembled one after another. 
To ensure safety, the front of the stairway is specially equipped with cushioned baffles, and the front windshield is heated with exhaust gas. This saves energy and reduces exhaust gas and carbon emissions. It is located at the entrance to the stairs connecting the first floor and the second floor. There is a thick spring pad of one person as a buffer block, which is fixed on the railing opposite to the entrance of the staircase so that passengers will not hit the iron railings and get injured even when they encounter sudden braking.
It is reported that an intelligent dispatch system is installed inside the Ankai double-decker bus. The driving information of the vehicle will also be displayed on the screen of the intelligent bus dispatching hall. After the double-decker buses are formally operated, they are basically sent every 5 or 6 minutes. During the peak hours and Saturday and Sunday, the car will call other vehicles that have run at the same speed at any time based on specific conditions to increase the vehicle density.