How to improve the quality of steel pipe welding
Modern quality management believes that for the product to meet the required quality indicators, it should start from every process of production and ensure it by controlling and adjusting the factors that affect the quality of the process. Process quality must be achieved through work quality and various management methods. Therefore, in quality management work, work quality should be used to ensure process quality and process quality should be used to ensure product quality. It can be seen that to achieve quality goals, it is necessary to establish an effective and easy-to-operate quality management system in the management system. And apply this system to the entire manufacturing process of products.
1. Peple----Welding operator factors.
Various welding methods rely on different levels of operator dependence. For manual arc welding, the welder's operating skills and careful work attitude are crucial to ensuring welding quality. For all kinds of semi-automatic welding, the movement of the arc along the welding joint is also controlled by the welder. If the welder has poor quality awareness during welding, is careless in operation, does not comply with the welding process regulations, or has low operating skills and unskilled technology, the quality of direct welding will be affected. The control measures for welding personnel are as follows:
(1) Strengthen the quality awareness education of welders that“quality comes first, users come first, and the next process is the user", improve their sense of responsibility and meticulous work style, and establish a quality responsibility system.
(2) Conduct on-the-job training for welders regularly, master process procedures theoretically, and improve operational skills in practice.
(3) Welders are required to strictly implement welding process regulations during production, and strengthen self-inspection of the welding process and inspection by full-time inspection personnel.
(4) Earnestly implement the welder examination system, insist that welders work with certificates, and establish welder technical files. For the production of important or major welded structures, more detailed consideration of the welder is required. For example, the length of welder training time, production experience, current technical status, age, length of service, physical strength, vision, attention, etc., should all be included in the scope of the assessment.
2. Machine----Welding machine equipment factors.
The performance stability and reliability of various welding equipment directly affect the welding quality. The more complex the equipment structure, the higher the degree of mechanization and automation, and the higher the welding quality depends on it. Therefore, such equipment is required to have better performance and stability. Welding equipment must be inspected and tried before use, and a regular inspection system must be implemented for all kinds of welding equipment in service. In the welding quality assurance system, to ensure the quality of the welding process, the following points should be done for welding machinery and equipment:
(1) Regular maintenance, maintenance, and repair of welding equipment, and trial use of important welded structures before production.
(2) Regularly calibrate various instruments such as ammeters, voltmeters, and gas flow meters on welding equipment to ensure accurate measurement during production.
(3) Establish technical files on the status of welding equipment to provide ideas for analyzing and solving problems that arise.
(4) Establish a responsibility system for welding equipment users to ensure the timeliness and continuity of equipment maintenance. In addition, the use conditions of welding equipment, such as requirements for water, electricity, environment, etc., the adjustability of welding equipment, the space required for operation, error adjustment, etc. also need to be fully paid attention to, to ensure the normal use of welding equipment.
3. Materia----Welding raw material factors.
The raw materials used in welding production include base metal, welding materials (welding rods, welding wires, flux, protective gas), etc. The quality of these : materials is the basis and prerequisite for ensuring the quality of welding products. To ensure welding quality, quality inspection of raw materials is very important. In the initial stage of production, that is, before feeding materials, it is necessary to seal the materials to stabilize production and stabilize the quality of welded products. In the welding quality management system, the quality control of welding raw materials mainly includes the following measures:
(1) Strengthen the factory acceptance and inspection of welding raw materials, and re-inspect their physical and chemical indicators and mechanical properties when necessary.
(2) Establish a strict management system for welding raw materials to prevent contamination of welding raw materials during storage.
(3) Implement a marking operation system for welding raw materials during production to achieve tracking and control of the quality of welding raw materials.
(4) Select welding raw material suppliers and cooperative factories with higher reputations and better product quality for ordering and processing to fundamentally prevent the occurrence of welding quality accidents. In short, the control of welding raw materials should be based on welding specifications and national standards, and their quality should be tracked and controlled promptly, rather than just entering the factory for acceptance and ignoring the marking and inspection during the production process.
1. Peple----Welding operator factors.
Various welding methods rely on different levels of operator dependence. For manual arc welding, the welder's operating skills and careful work attitude are crucial to ensuring welding quality. For all kinds of semi-automatic welding, the movement of the arc along the welding joint is also controlled by the welder. If the welder has poor quality awareness during welding, is careless in operation, does not comply with the welding process regulations, or has low operating skills and unskilled technology, the quality of direct welding will be affected. The control measures for welding personnel are as follows:
(1) Strengthen the quality awareness education of welders that“quality comes first, users come first, and the next process is the user", improve their sense of responsibility and meticulous work style, and establish a quality responsibility system.
(2) Conduct on-the-job training for welders regularly, master process procedures theoretically, and improve operational skills in practice.
(3) Welders are required to strictly implement welding process regulations during production, and strengthen self-inspection of the welding process and inspection by full-time inspection personnel.
(4) Earnestly implement the welder examination system, insist that welders work with certificates, and establish welder technical files. For the production of important or major welded structures, more detailed consideration of the welder is required. For example, the length of welder training time, production experience, current technical status, age, length of service, physical strength, vision, attention, etc., should all be included in the scope of the assessment.
2. Machine----Welding machine equipment factors.
The performance stability and reliability of various welding equipment directly affect the welding quality. The more complex the equipment structure, the higher the degree of mechanization and automation, and the higher the welding quality depends on it. Therefore, such equipment is required to have better performance and stability. Welding equipment must be inspected and tried before use, and a regular inspection system must be implemented for all kinds of welding equipment in service. In the welding quality assurance system, to ensure the quality of the welding process, the following points should be done for welding machinery and equipment:
(1) Regular maintenance, maintenance, and repair of welding equipment, and trial use of important welded structures before production.
(2) Regularly calibrate various instruments such as ammeters, voltmeters, and gas flow meters on welding equipment to ensure accurate measurement during production.
(3) Establish technical files on the status of welding equipment to provide ideas for analyzing and solving problems that arise.
(4) Establish a responsibility system for welding equipment users to ensure the timeliness and continuity of equipment maintenance. In addition, the use conditions of welding equipment, such as requirements for water, electricity, environment, etc., the adjustability of welding equipment, the space required for operation, error adjustment, etc. also need to be fully paid attention to, to ensure the normal use of welding equipment.
3. Materia----Welding raw material factors.
The raw materials used in welding production include base metal, welding materials (welding rods, welding wires, flux, protective gas), etc. The quality of these : materials is the basis and prerequisite for ensuring the quality of welding products. To ensure welding quality, quality inspection of raw materials is very important. In the initial stage of production, that is, before feeding materials, it is necessary to seal the materials to stabilize production and stabilize the quality of welded products. In the welding quality management system, the quality control of welding raw materials mainly includes the following measures:
(1) Strengthen the factory acceptance and inspection of welding raw materials, and re-inspect their physical and chemical indicators and mechanical properties when necessary.
(2) Establish a strict management system for welding raw materials to prevent contamination of welding raw materials during storage.
(3) Implement a marking operation system for welding raw materials during production to achieve tracking and control of the quality of welding raw materials.
(4) Select welding raw material suppliers and cooperative factories with higher reputations and better product quality for ordering and processing to fundamentally prevent the occurrence of welding quality accidents. In short, the control of welding raw materials should be based on welding specifications and national standards, and their quality should be tracked and controlled promptly, rather than just entering the factory for acceptance and ignoring the marking and inspection during the production process.