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Weld quality failure caused by used welded pipe machines (6)
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- Release time：2023-02-01 11:30
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【概要描述】When manufacturing welded pipes for used welded pipe machines, judging that the quality of the welded pipes meets the standard depends on the quality of the welds. Therefore, the quality of the weld is very important, so sometimes it is necessary to rule out the quality of the weld. We perform analyses to understand weld quality failures.
Weld quality failure caused by used welded pipe machines (6)
【概要描述】When manufacturing welded pipes for used welded pipe machines, judging that the quality of the welded pipes meets the standard depends on the quality of the welds. Therefore, the quality of the weld is very important, so sometimes it is necessary to rule out the quality of the weld. We perform analyses to understand weld quality failures.
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- Release time：2023-02-01 11:30
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Detail
When manufacturing welded pipes for used welded pipe machines, judging that the quality of the welded pipes meets the standard depends on the quality of the welds. Therefore, the quality of the weld is very important, so sometimes it is necessary to rule out the quality of the weld. We perform analyses to understand weld quality failures.
These weld quality failures will occur when the used welded pipe machines is making pipes: ① through-length lap welding. ② Periodic lap welding. ③ Open the seam. ④ Trachoma. ⑤ Peach-shaped tube. ⑥ Weld seam gnawed. ⑦Outer burr planing. ⑧ Heating. ⑨ The current is small. ⑩ Melting of induction coils and electrodes. ⑪ Fire. ⑫ "No high pressure" phenomenon. We can summarize 12 causes of weld quality failures.
Weld seam gnawed
There are two forms of gnawing of welds, one is crescent-shaped scratches; the other is indentation. This kind of trauma is generally relatively minor and will not affect the quality of the weld, but the surface of the pipe is not very beautiful. Lap welds are formed when the depression marks become indented. Pinhole-type sand holes may appear in the crescent-shaped marks produced by the rupture of the upper edge of the extrusion roller hole. Therefore, we distinguish this type of accident from other scratch accidents.
(1) Crescent moon marks. The crescent-shaped scratch marks are one of the main scars on the weld, most of which are caused by the squeezing roller. Sometimes the vertical roller that forms a closed hole pattern will also cause scratches, mainly because the upper edge of the hole pattern appears. It is caused by slight cracks falling off the edge or other hard substances sticking to the edge of the hole. Especially after the extrusion roller is heated, many small cracks will be generated on the edge of the hole, and various oxidized metal impurities will be adhered, which is the cause of where the scratching problem lies. When the machine is stopped, we can use our fingers to do a touch inspection along the upper edge of the hole pattern, and repair or replace it according to the situation.
(2) Indentation. The indentation is mainly caused by the upper roll forming the closed hole pattern. Due to the characteristics of the hole structure, the bottom diameter of the upper roller is the most stressed. When the hardness of the roll is low, the wear of the pass is accelerated, and when the hardness of the roll is high, the bottom diameter of the pass is very prone to quenching cracks, and the cracked roll edge will cause many slight indentations to the weld. As the quench cracking problem increases and the reduction force increases, the indentation will become more serious. Therefore, it should be replaced in time when the hole type is found to be quenched and cracked.
Outer burr planing
Any scars that do not meet the product quality requirements formed after the outer burr is removed are called planing injuries. Although the chance of gouging is very small, it directly affects the appearance quality of the product. In order to reduce planing accidents, the cutting tools should be sharpened first, so as to improve the planing quality and save the tools. Secondly, it is necessary to ensure the stability and flexibility of the planing equipment, and to find a targeted treatment method in the event of an accident.
(1) Burning knife. Burning a knife is an accident that happens by accident. Generally, in production, the unit suddenly slows down and the heating temperature is extremely high, or the unit has just started to heat up before reaching the normal speed, which will make the high-temperature burr chips not easy to plan off the pipe surface and accumulate on the cutting edge. The blade burns out. This requires us to pay attention to the coordination and matching of operation actions and time in production, as well as the timely response of operations.
(2) The weld is uneven. The longitudinal plane of the weld seam after planing is wavy, which is called planing unevenness. If the waves are as tight as a washboard, it is usually caused by the fact that the relief angle of the cutting tool is too small or the strength of the tool bar is not enough to cause vibration. If the wave is a large wave with a long period, it generally occurs on a smaller pipe diameter. Due to its low weight, the pipe on the idler will bob up and down when planing, forming a wave shape. In addition, the instability of the tool holder will also produce a large wave jump and form a wavy planing result.
(3) Planing (scraping) partial. The welded seam after planing is an inclined plane, commonly known as planing (scraping) deviation (Figure 26).
There are two main reasons for the planing (scraping) deviation.
One is that the cutting tool is installed inclined, and this problem is relatively easy to solve.
The other is caused by the pipe turning. If it is only a slight planing deviation and does not affect the welding effect, we can adjust the planing knife a little, or control the direction of the welding seam by adjusting the angle and pressure of the guide roller.
(4) Plane. Sometimes we can find that a wide and flat wound is left after the burr is removed. In fact, this has nothing to do with planing, but is caused by the "peach-shaped" pipe, which causes the welding seam to form large external burrs after extrusion, so it is necessary to replace the new extrusion roller immediately. Get good weld results and weld gouging quality.
The above is one of the reasons for the quality failure of the welding seam when the used welded pipe machines is making pipes, such as the welding seam gnawing and the external burr gouging. The main reasons for the formation of weld gnawing are (1)Crescent moon marks. (2) Indentation. There are also the main reasons for the formation of external burr planing (1) burning knife. (2) The weld is uneven. (3) Planing (scraping) partial. (4) Plane.
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Analysis of seven key factors affecting the effective power output of second-hand high-frequency welded pipe machines
Time of issue : 2024-08-25
High frequency welded pipe machine is widely used in modern industry, especially in the pipe manufacturing industry. It is highly favored by users for its high efficiency and precision. In order to better understand and master this technology, this article will use the keyword "second-hand welded pipe machine" and combine it with practical applications to analyze the seven key factors of its effective power output.
Firstly, we need to clarify the definition of 'second-hand welded pipe machine'. Second hand welded pipe machine refers to equipment that has been used but has been repaired and debugged before being put back into use. Due to its newer production technology and lower purchasing costs, it has become an ideal choice for many small and medium-sized enterprises. However, understanding the influencing factors of power output issues that arise during use, especially in high-frequency and high-intensity operating environments, is crucial.
1. The aging degree of the equipment itself: The components of the second-hand welding pipe machine will wear and age to varying degrees over time, which directly affects the stability of its power output. The maintenance and regular inspection of equipment can reduce this impact.
2. Operating environment: Factors such as humidity, temperature, and electromagnetic interference also have a significant impact on the operation of second-hand welded pipe machines. Maintaining a good working environment is crucial for the effective power output of equipment.
3. Debugging and Calibration: Before the second-hand welded pipe machine is put back into use, it needs to undergo strict debugging and calibration to ensure that all parameters reach their optimal state. This has a significant impact on the stability and power output of the device.
4. Operational skills: Proficient operational skills are the key to ensuring the efficient operation of second-hand welded pipe machines. Familiar with device characteristics and able to flexibly adjust operating parameters can significantly improve power output efficiency.
5. Power quality: Unstable power supply can cause fluctuations in the power output of second-hand welded pipe machines. The use of high-quality power equipment to ensure stable voltage and current is the foundation for ensuring the normal operation of the equipment.
6. Maintenance: Regular maintenance can effectively extend the service life of second-hand welded pipe machines and help stabilize power output. During maintenance, key parts such as welding joints, cooling systems, and electrical components should be carefully inspected.
7. Load adaptability: The power output of a second-hand welded pipe machine is not only affected by the equipment itself, but also by its matching with the load. Appropriate load distribution and reasonable production scheduling can comprehensively improve the operational efficiency of equipment.
In summary, a comprehensive understanding and mastery of the seven key factors mentioned above can significantly improve the effective power output of second-hand high-frequency welded pipe machines, extend equipment life, and lay a solid foundation for enterprises to save costs and improve production efficiency. Mastering these key points will undoubtedly result in twice the result with half the effort when choosing and using a second-hand welded pipe machine.
For more information, please pay attention to the website of Jinyujie Mechanical and Electrical Used Pipe Mill Supplier：www.usedpipemill.com
JinYuJie-Used Pipe Mills Supplier（Please click the link→) :second-hand pipe mill
High frequency welded pipe machine is widely used in modern industry, especially in the pipe manufacturing industry. It is highly favored by users for its high efficiency and precision. In order to better understand and master this technology, this article will use the keyword "second-hand welded pipe machine" and combine it with practical applications to analyze the seven key factors of its effective power output.
Firstly, we need to clarify the definition of 'second-hand welded pipe machine'. Second hand welded pipe machine refers to equipment that has been used but has been repaired and debugged before being put back into use. Due to its newer production technology and lower purchasing costs, it has become an ideal choice for many small and medium-sized enterprises. However, understanding the influencing factors of power output issues that arise during use, especially in high-frequency and high-intensity operating environments, is crucial.
1. The aging degree of the equipment itself: The components of the second-hand welding pipe machine will wear and age to varying degrees over time, which directly affects the stability of its power output. The maintenance and regular inspection of equipment can reduce this impact.
2. Operating environment: Factors such as humidity, temperature, and electromagnetic interference also have a significant impact on the operation of second-hand welded pipe machines. Maintaining a good working environment is crucial for the effective power output of equipment.
3. Debugging and Calibration: Before the second-hand welded pipe machine is put back into use, it needs to undergo strict debugging and calibration to ensure that all parameters reach their optimal state. This has a significant impact on the stability and power output of the device.
4. Operational skills: Proficient operational skills are the key to ensuring the efficient operation of second-hand welded pipe machines. Familiar with device characteristics and able to flexibly adjust operating parameters can significantly improve power output efficiency.
5. Power quality: Unstable power supply can cause fluctuations in the power output of second-hand welded pipe machines. The use of high-quality power equipment to ensure stable voltage and current is the foundation for ensuring the normal operation of the equipment.
6. Maintenance: Regular maintenance can effectively extend the service life of second-hand welded pipe machines and help stabilize power output. During maintenance, key parts such as welding joints, cooling systems, and electrical components should be carefully inspected.
7. Load adaptability: The power output of a second-hand welded pipe machine is not only affected by the equipment itself, but also by its matching with the load. Appropriate load distribution and reasonable production scheduling can comprehensively improve the operational efficiency of equipment.
In summary, a comprehensive understanding and mastery of the seven key factors mentioned above can significantly improve the effective power output of second-hand high-frequency welded pipe machines, extend equipment life, and lay a solid foundation for enterprises to save costs and improve production efficiency. Mastering these key points will undoubtedly result in twice the result with half the effort when choosing and using a second-hand welded pipe machine.
For more information, please pay attention to the website of Jinyujie Mechanical and Electrical Used Pipe Mill Supplier：www.usedpipemill.com
JinYuJie-Used Pipe Mills Supplier（Please click the link→) :second-hand pipe mill
Analysis of the problem of non squareness in the adjustment of square and rectangular tubes and the method of correcting vertical rollers
Time of issue : 2024-08-24
Product feature introduction
Economical and cost-effective
Firstly, the price of second-hand welded pipe machines is relatively low, which is their most intuitive advantage. For small and medium-sized enterprises, purchasing second-hand equipment can effectively reduce initial investment costs while ensuring the basic functions and production efficiency of the equipment. This makes second-hand square tube machines highly competitive and cost-effective in the market.
Multi functional and easy to maintain
Another major selling point of second-hand welded pipe machines is their versatility. After appropriate adjustments and maintenance, these machines can produce steel pipes of different specifications and shapes to meet diverse market demands. In addition, the maintenance cost of second-hand equipment is usually lower because at the time of purchase, suppliers often provide detailed usage records and maintenance guidelines for the equipment, making it easier for users to perform daily maintenance and repair minor faults.
The issue of 'non square' in the adjustment process
In the process of using a second-hand square tube machine to produce square and rectangular tubes, a common problem is the phenomenon of "square and rectangular tubes not being square". Specifically, this means that the produced square or rectangular pipes have uneven edges, angles, or lengths on each side, which can affect the quality and aesthetics of the product. The main reasons for this problem are improper machine tool parameter settings, roller wear, and differences in material quality.
Correction method of vertical roller
In order to solve the problem of "non square", the use of standing rollers is particularly important. Vertical roller is a tool used to adjust the shape of pipes. By setting the pressure and position of the vertical roller reasonably, the formed square tube can be calibrated to meet the standard requirements in terms of appearance. In the specific operation, the staff need to gradually adjust the angle and force of the vertical roller according to the actual deviation of the square tube, until the various dimensions of the square tube meet the standards.
Application scenarios and instance analysis
The second-hand welded pipe machine is not only suitable for standardized production, but also meets personalized customization needs. Taking construction sites and pipeline installation projects as examples, these fields often require steel pipes of different sizes and shapes. By adjusting the vertical rollers, the second-hand welded pipe machine can quickly produce square and rectangular pipes that meet specific requirements, greatly improving production efficiency and product quality.
Overall, second-hand square tube machines have become an ideal choice in the market due to their affordability, versatility, and ease of maintenance. By setting up and using vertical rollers reasonably, it is possible to effectively address the issue of "non square" in production and ensure product quality. These unique selling points not only make second-hand welded pipe machines shine in industrial manufacturing, but also bring significant economic benefits to enterprises.
For more information, please pay attention to the website of Jinyujie Mechanical and Electrical Used Pipe Mill Supplier：www.usedpipemill.com
JinYuJie-Used Pipe Mills Supplier（Please click the link→) :second-hand pipe mill
Product feature introduction
Economical and cost-effective
Firstly, the price of second-hand welded pipe machines is relatively low, which is their most intuitive advantage. For small and medium-sized enterprises, purchasing second-hand equipment can effectively reduce initial investment costs while ensuring the basic functions and production efficiency of the equipment. This makes second-hand square tube machines highly competitive and cost-effective in the market.
Multi functional and easy to maintain
Another major selling point of second-hand welded pipe machines is their versatility. After appropriate adjustments and maintenance, these machines can produce steel pipes of different specifications and shapes to meet diverse market demands. In addition, the maintenance cost of second-hand equipment is usually lower because at the time of purchase, suppliers often provide detailed usage records and maintenance guidelines for the equipment, making it easier for users to perform daily maintenance and repair minor faults.
The issue of 'non square' in the adjustment process
In the process of using a second-hand square tube machine to produce square and rectangular tubes, a common problem is the phenomenon of "square and rectangular tubes not being square". Specifically, this means that the produced square or rectangular pipes have uneven edges, angles, or lengths on each side, which can affect the quality and aesthetics of the product. The main reasons for this problem are improper machine tool parameter settings, roller wear, and differences in material quality.
Correction method of vertical roller
In order to solve the problem of "non square", the use of standing rollers is particularly important. Vertical roller is a tool used to adjust the shape of pipes. By setting the pressure and position of the vertical roller reasonably, the formed square tube can be calibrated to meet the standard requirements in terms of appearance. In the specific operation, the staff need to gradually adjust the angle and force of the vertical roller according to the actual deviation of the square tube, until the various dimensions of the square tube meet the standards.
Application scenarios and instance analysis
The second-hand welded pipe machine is not only suitable for standardized production, but also meets personalized customization needs. Taking construction sites and pipeline installation projects as examples, these fields often require steel pipes of different sizes and shapes. By adjusting the vertical rollers, the second-hand welded pipe machine can quickly produce square and rectangular pipes that meet specific requirements, greatly improving production efficiency and product quality.
Overall, second-hand square tube machines have become an ideal choice in the market due to their affordability, versatility, and ease of maintenance. By setting up and using vertical rollers reasonably, it is possible to effectively address the issue of "non square" in production and ensure product quality. These unique selling points not only make second-hand welded pipe machines shine in industrial manufacturing, but also bring significant economic benefits to enterprises.
For more information, please pay attention to the website of Jinyujie Mechanical and Electrical Used Pipe Mill Supplier：www.usedpipemill.com
JinYuJie-Used Pipe Mills Supplier（Please click the link→) :second-hand pipe mill
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Wechat: 13392281699
Email: zty@usedpipemill.com
Company address:No. A99, East Lecong Avenue, Lecong Town, Foshan City, Guangdong Province
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