OEM CNC machining metal parts stainless steel factory
The source of product quality problems is 30% from manufacturing, and 70% from product design defects. Process design is the most important part of product design implementation. Doing a good job in process design can avoid 70% of quality accidents. OEM CNC machining metal parts stainless steel factory
Process review is a self-improvement engineering management method for producers to detect and correct defects in process design as early as possible, and provide decision-making consultation for the approval of process design without changing the technical responsibility system. If the process review is done well, the losses caused by many production errors can be avoided.
Basic Requirements for Process Review
For the process design of products, the manufacturer should establish a graded and staged process review system according to the management level and product development procedures.
Manufacturers should determine the process design stage of the product for specific products, set review points, and include them in the model development plan network diagram, and organize hierarchical and staged process reviews. If the process review is not carried out according to the specified requirements or the review fails, the work shall not be transferred to the next stage.
Each process review of the producer shall involve the participation of representatives of all functional departments that affect the quality of the reviewed stage. If necessary, the user or its representatives and other experts may be invited to participate; The correctness, advancement, economy, feasibility and testability of the design are analyzed, reviewed and evaluated. OEM CNC machining metal parts stainless steel factory
The basis for the process review includes product design data, development task book and contract, relevant regulations, standards, specifications, technical management documents and quality system procedures, as well as the review conclusion report of the previous stage.
The key objects of the process review are the instructive process documents such as the general process plan, the process specification, key parts, important parts, the process regulations of the key process and the process documents of the special process.
Evaluation points of various process documents
- Review of the overall process plan
a. Process analysis and description of product characteristics, structure and characteristic requirements;
b. Analysis to meet product design requirements and ensure manufacturing quality;
c. A description of the division of labor for product manufacturing; OEM CNC machining metal parts stainless steel factory
d. Process weak links and technical measures plan;
e. Selection, appraisal principles and plans for process equipment, testing and testing equipment, and computer software for CNC machining and testing of products;
f. Determination and control principles of material consumption quota;
g. Control requirements for the technical state of products in the manufacturing process;
h. Process preparation cycle and network plan for product development, as well as cost budget and allocation principles for the implementation process;
i. Evaluation of the correctness, advancement, feasibility, testability, economy and manufacturing capability of the overall process plan; j-Description of the degree of standardization of the process (documents, elements, equipment, terms, symbols, etc.). OEM CNC machining metal parts stainless steel factory
j. Dynamic management of the overall process plan (it should be revised and improved in a timely manner according to the work progress in the development stage and production stage, so that it can be used continuously during the life cycle of the project).
Second, the review of the process specification
a. The correctness, rationality and feasibility of the process flow, process parameters and process control requirements of the product manufacturing process;
b. The feasibility and effectiveness of the corresponding measures taken for the situation that the resources and environmental conditions cannot currently meet the requirements of the process specification;
c. Qualification control requirements for personnel engaged in operation and inspection;
d. The completeness, correctness, uniformity and coordination of the documents;
e. Whether the document and its changes strictly follow the approval procedures, and whether the changes have been fully tested and verified. OEM CNC machining metal parts stainless steel factory
- Review of process documents for key parts, important parts and key processes
a. The correctness of the key process determination and the completeness of the key process catalog;
b. Whether the process documents of key parts, important parts and key processes are clearly marked, and the rationality of quality control points;
c. The rationality and feasibility of key parts, important parts, technological processes and methods of key processes, and quality control requirements;
d. The feasibility and effectiveness of the key process technical difficulties tackling measures;
e. Whether the changes of key parts, important parts and key process documents have been verified and the approval procedures have been strictly performed.
Fourth, the review of special process technology documents
a. The coordination and consistency of special process process documents, process specifications, and quality system procedures;
b. The correctness of the items, requirements and methods of special process test and inspection;
c- Feasibility and effectiveness of measures to tackle technical difficulties in special processes;
d. Whether the modification of the process parameters of the special process has been fully tested and verified, and the approval procedure has been strictly performed.
- Review of the adoption of new processes, new technologies, new materials and new equipment
a. The necessity and feasibility of adopting new processes and technologies, the feasibility of new material processing methods, and the applicability of the new equipment selected; OEM CNC machining metal parts stainless steel factory
b. Whether the new process, new technology and new equipment used have been certified and qualified, and there is qualified evidence;
c. Whether new processes, new technologies, new materials, and new equipment have been tested, tested, and verified before they are adopted to show that they meet the specified requirements and have complete original records;
d. Whether there are measures plans and quality control requirements for adopting new processes, new technologies, new materials and new equipment;
e. Qualification control requirements for operators and inspection personnel. OEM CNC machining metal parts stainless steel factory
