The application range of the Sheet Metal Processing industry is constantly expanding, ranging from daily necessities to industrial appliances, etc., which all involve the technology of sheet metal processing. Sheet metal chassis is a common product we see, such as computer mainframes, switch housings, etc. So how to control the processing quality of sheet metal chassis cabinets? The following non-standard cabinet customization shares several major factors that ensure quality in the process of sheet metal processing: 1. Operator factors, poor quality awareness of operators, careless operation, failure to follow operating procedures, low operating skills, unskilled technology, and boredom due to simple repetition of work. Controllable measures to prevent defects are: (1) Strengthen the establishment and improvement of the quality responsibility system; (2) Write a clear and detailed operation process and strengthen the professional training of the process; (3) Strengthen the "three inspections" work and appropriately increase the frequency of inspections (including self-inspections); (4) Through the adjustment of personnel between the types of work, the enrichment of work experience and other methods (training multi-functional workers), eliminate the operator‘s boredom, promote self-improvement and enhance self-improvement ability. 2. Material factors, the main control measures are: (1) Clearly specify the quality requirements when purchasing raw materials; (2) Strengthen the inspection of raw materials into the factory; (3) Reasonable selection of suppliers; (4) Do a good job in the cooperative relationship with users to help users do a good job in quality control and quality assurance. 3. Machine factors, the main control measures are: (1) Strengthen equipment maintenance and maintenance, regularly test the key accuracy and performance items of the equipment, and establish a daily inspection system for key parts of the equipment to control the equipment at the process quality control point; (2) Use the first piece inspection system to verify the adjustment amount of the positioning or quantitative device; (3) Use numerical control machine tools as much as possible to reduce the dependence on the reliability of workers‘ operation; (4) Gradually establish a Facility Management system to achieve good equipment performance. 4. Sheet metal processing technology, the process method includes the arrangement of the process flow, the connection between the processes, the selection of process processing means and the preparation of process processing guidance documents. The influence of process methods on process quality mainly comes from three aspects: first, the formulation of processing methods, the correctness and rationality of the selected process parameters and process equipment; second, the seriousness of the implementation of the process method; third, the supervision of the implementation of the process between departments. The process method constitutes the technical content of the product. A reasonable process will reduce the cost of the product and improve the pass rate. It can be said that a reasonable process and the correct production operation process constitute a qualified product.