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Factors causing the quality failure of the weld in the used round pipe forming machine—Slit
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【概要描述】Factors that cause weld quality failures in used round tube forming machine include ①lap welding, ②cycle lap welding, ③opening, ④bathholes. The following is an introduction to the cause of weld quality failure-open seam.
Factors causing the quality failure of the weld in the used round pipe forming machine—Slit
【概要描述】Factors that cause weld quality failures in used round tube forming machine include ①lap welding, ②cycle lap welding, ③opening, ④bathholes. The following is an introduction to the cause of weld quality failure-open seam.
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Detail
Factors that cause weld quality failures in used round tube forming machine include ①lap welding. ②cycle lap welding. ③opening. ④bathholes. The following is an introduction to the cause of weld quality failure-Slit.
Seam refers to the phenomenon that the welds are not bonded together. The length of the seam is generally more than a few centimeters or even longer. The main reasons for the seam formed in the used round tube forming machine are as follows:
(1) The hole type is worn out. With the wear of the squeeze roller pass, the size of the pass (R) gradually increases. When using hot-rolled steel strip as the raw material for welded pipes, when the width of the steel strip has a negative deviation or slightly stretched steel, the welding seam will have quality problems. The lighter one will cause the trachoma tube and no internal welding ribs, and the heavy one is the open seam pipe. The production. Therefore, it is necessary to constantly check the internal burr of the welded pipe, increase the squeeze amount of the squeeze roller, or replace with a new pass in time.
(2) The bearing is damaged. When the bearing of the squeeze roller is only slightly damaged, the welding seam quality problems such as sand hole tube and lap welded pipe will occur. The seam becomes a full-open shape, accompanied by other quality accidents. At this time, we can also observe the squeeze roller with bearing damage, and the swing amplitude will become larger as the degree of bearing damage increases.
(3) Magnetic rod. The magnetic bar will form a magnetic field during the tube blank welding process, and the high-frequency current can be highly concentrated in the "ⅴ"-shaped area of the weld seam, so that the weld seam can reach a high temperature point in a very short time. If there is no magnetic rod in the tube, it will have a great influence on the proximity effect and skin effect of the high-frequency current. The most obvious feature is that the welding seam is black and red, there is no splashing spark, and the welding seam is fully open. Sometimes even if it is welded, it is a false welding, and there will be a crackling sound when the pipe is sizing. If the magnet bar fails or the installation position is not appropriate, the welded pipe will burst, even if it does not crack, its strength is very low. At this time, the welding seam is generally yellow or light blue due to insufficient hot spot temperature.
(4) Material. Due to the chemical composition of the raw materials, although the welding process is relatively normal, the welding seam will still crack. Sometimes the pipe cracks during the sizing, accompanied by the sound of welding seam cracking. The color of the weld at this time is relatively blue, indicating that the temperature is still normal. Sometimes we can see that the crack of the weld deviates from the center of the weld. This is to glue the edges of the base material down to form irregular cracks. This phenomenon is purely embrittlement caused by the chemical composition of the raw material.
Due to the above 4 factors, the quality of the welding seam in the used round tube forming machine is caused by seam opening. When the welded pipe is made, it is necessary to check whether the second-hand roll forming machine has these problems.
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more datail about this 140 enlarged 165 used tube mill line, please check here:
https://www.usedpipemill.com/product/Forever-Used-High-Frequency-Welding-Pipe-Making-Machie-of-%CE%A6140-Expand-to-%CE%A6165MM-221.html
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
Answer: Three core advantages:
The processing capacity of this used pipe making machine includes round pipes with diameter of 60-159mm, square and rectangular pipes with diameter of 50 * 50-120 * 120mm, anda wall thickness of 2.0-5.0mm, fully covering the mainstream demand of the welded pipe equipment market.
Refurbishment guarantee for Used ERW tube mill machinery: All mechanical and electrical components undergo professional maintenance/replacement, and the life assessment of key components meets the standards. The renovation and maintenance process for second-hand welded pipe equipment takes at least one month and up to three months.
The cost efficiency of the second-hand high-frequency welded pipe machine is only 45% of that of the new welded pipe machine. The production line of the used welded pipe mills production line sold by our company includes a one-year extended warranty, free training, and lifelong technical support.
Q: After purchasing second-hand welded pipe equipment, how long can it be put into production?
Answer: Jin Yujie Company's second-hand welded pipe equipment is all sourced from first-hand sources, with stock in the warehouse. It takes 7 days to ship and 15 days to complete installation and commissioning. The second-hand welded pipe unit can be purchased and used immediately.
It is recommended to arrange a technical team and decision-makers to conduct on-site inspections of the warehouse as soon as possible, select a second-hand welded pipe unit on site, in order to put it into production as soon as possible, create production capacity for the second-hand welded pipe production line, and achieve profitability.
more datail about this 140 enlarged 165 used tube mill line, please check here:
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Answer: Jin Yujie Company's second-hand welded pipe equipment is all sourced from first-hand sources, with stock in the warehouse. It takes 7 days to ship and 15 days to complete installation and commissioning. The second-hand welded pipe unit can be purchased and used immediately.
It is recommended to arrange a technical team and decision-makers to conduct on-site inspections of the warehouse as soon as possible, select a second-hand welded pipe unit on site, in order to put it into production as soon as possible, create production capacity for the second-hand welded pipe production line, and achieve profitability.
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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
Answer: Three core advantages:
The processing capacity of this used pipe making machine includes round pipes with diameter of 60-159mm, square and rectangular pipes with diameter of 50 * 50-120 * 120mm, anda wall thickness of 2.0-5.0mm, fully covering the mainstream demand of the welded pipe equipment market.
Refurbishment guarantee for Used ERW tube mill machinery: All mechanical and electrical components undergo professional maintenance/replacement, and the life assessment of key components meets the standards. The renovation and maintenance process for second-hand welded pipe equipment takes at least one month and up to three months.
The cost efficiency of the second-hand high-frequency welded pipe machine is only 45% of that of the new welded pipe machine. The production line of the used welded pipe mills production line sold by our company includes a one-year extended warranty, free training, and lifelong technical support.
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Answer: Jin Yujie Company's second-hand welded pipe equipment is all sourced from first-hand sources, with stock in the warehouse. It takes 7 days to ship and 15 days to complete installation and commissioning. The second-hand welded pipe unit can be purchased and used immediately.
It is recommended to arrange a technical team and decision-makers to conduct on-site inspections of the warehouse as soon as possible, select a second-hand welded pipe unit on site, in order to put it into production as soon as possible, create production capacity for the second-hand welded pipe production line, and achieve profitability.
more datail about this 140 enlarged 165 used tube mill line, please check here:
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The Role of Roller Conveyor Motors in Used Pipe Welding Machines
Time of issue : 2025-03-05
Used pipe welding machines refer to welding equipment that has been previously used and is resold, typically for producing welded steel pipes. In used pipe welding machines, the roller conveyor motor is a critical component whose role runs through the entire production process, directly affecting the equipment's operational efficiency, processing accuracy, and product quality. Below is an analysis of the main functions and importance of roller conveyor motors in used pipe welding machines.
1. Transporting Pipe Materials
The primary function of the roller conveyor motor is to drive the rollers, transporting pipe materials from one process to the next. During pipe welding production, the pipe material needs to go through multiple stages, including uncoiling, forming, welding, cooling, sizing, and cutting. The roller conveyor motor ensures smooth and continuous movement of the pipe material by controlling the rotation of the rollers, preventing jams or deviations.
2. Ensuring Production Continuity
In used pipe welding machines, the stable operation of the roller conveyor motor is key to ensuring production continuity. If the motor fails, it may cause interruptions in material transportation, affecting the efficiency of the entire production line. Therefore, the reliability and durability of the roller conveyor motor are particularly important, especially in used equipment, where regular maintenance and care are essential.
3. Controlling Pipe Material Speed
The roller conveyor motor controls the speed of the rollers through a speed regulation device, thereby adjusting the transportation speed of the pipe material. During the welding process, the transportation speed of the pipe material must match the welding speed to ensure weld quality. The precise control capability of the roller conveyor motor directly affects welding results and production efficiency.
4. Improving Processing Accuracy
The smooth operation of the roller conveyor motor helps reduce vibrations and deviations during material transportation, thereby improving processing accuracy. In used pipe welding machines, the performance of the roller conveyor motor may decline due to equipment aging, so regular inspection and maintenance are necessary to ensure its operational precision.
5. Adapting to Multiple Specifications
Roller conveyor motors are typically equipped with speed regulation functions, allowing them to adapt to the production of pipes with different specifications. For example, when producing thin-walled and thick-walled pipes, the motor needs to adjust its speed to meet different processing requirements. This flexibility enables used pipe welding machines to fulfill diverse production needs.
6. Energy Saving and Efficiency
Modern roller conveyor motors are often designed for high efficiency and energy savings, reducing energy consumption and improving production efficiency. In used pipe welding machines, if the motor is aging or its performance declines, energy consumption may increase. Therefore, it is recommended to upgrade or replace the motor to enhance the overall energy efficiency of the equipment.
7. Reducing Equipment Wear
The smooth operation of the roller conveyor motor can reduce wear on other components of the equipment. For instance, if the motor operates unstably, it may cause premature wear on rollers, bearings, and other parts, increasing maintenance costs. Thus, in used pipe welding machines, the condition of the roller conveyor motor directly impacts the equipment's service life.
8. Automation Control
In modern pipe welding production lines, roller conveyor motors are often integrated with PLCs (Programmable Logic Controllers) and sensors to achieve automated control. In used pipe welding machines, if the roller conveyor motor supports automation functions, it can significantly improve production efficiency and product quality.
9. Safety
The stable operation of the roller conveyor motor is also closely related to production safety. If the motor fails, it may lead to material pile-ups, equipment jams, or even injuries. Therefore, in used pipe welding machines, the safety of the roller conveyor motor cannot be overlooked.
10. Maintenance and Care
In used pipe welding machines, the maintenance of the roller conveyor motor is particularly important. Since the equipment has been used for a certain period, the motor's performance may have declined. Regularly checking the motor's insulation, lubrication, and operating temperature can extend its service life and ensure stable equipment operation.
Conclusion
The roller conveyor motor plays a vital role in used pipe welding machines, with its functions covering material transportation, speed control, processing accuracy, energy efficiency, and more. For used equipment, the condition of the roller conveyor motor directly affects the overall performance and production efficiency of the equipment. Therefore,
Used pipe welding machines refer to welding equipment that has been previously used and is resold, typically for producing welded steel pipes. In used pipe welding machines, the roller conveyor motor is a critical component whose role runs through the entire production process, directly affecting the equipment's operational efficiency, processing accuracy, and product quality. Below is an analysis of the main functions and importance of roller conveyor motors in used pipe welding machines.
1. Transporting Pipe Materials
The primary function of the roller conveyor motor is to drive the rollers, transporting pipe materials from one process to the next. During pipe welding production, the pipe material needs to go through multiple stages, including uncoiling, forming, welding, cooling, sizing, and cutting. The roller conveyor motor ensures smooth and continuous movement of the pipe material by controlling the rotation of the rollers, preventing jams or deviations.
2. Ensuring Production Continuity
In used pipe welding machines, the stable operation of the roller conveyor motor is key to ensuring production continuity. If the motor fails, it may cause interruptions in material transportation, affecting the efficiency of the entire production line. Therefore, the reliability and durability of the roller conveyor motor are particularly important, especially in used equipment, where regular maintenance and care are essential.
3. Controlling Pipe Material Speed
The roller conveyor motor controls the speed of the rollers through a speed regulation device, thereby adjusting the transportation speed of the pipe material. During the welding process, the transportation speed of the pipe material must match the welding speed to ensure weld quality. The precise control capability of the roller conveyor motor directly affects welding results and production efficiency.
4. Improving Processing Accuracy
The smooth operation of the roller conveyor motor helps reduce vibrations and deviations during material transportation, thereby improving processing accuracy. In used pipe welding machines, the performance of the roller conveyor motor may decline due to equipment aging, so regular inspection and maintenance are necessary to ensure its operational precision.
5. Adapting to Multiple Specifications
Roller conveyor motors are typically equipped with speed regulation functions, allowing them to adapt to the production of pipes with different specifications. For example, when producing thin-walled and thick-walled pipes, the motor needs to adjust its speed to meet different processing requirements. This flexibility enables used pipe welding machines to fulfill diverse production needs.
6. Energy Saving and Efficiency
Modern roller conveyor motors are often designed for high efficiency and energy savings, reducing energy consumption and improving production efficiency. In used pipe welding machines, if the motor is aging or its performance declines, energy consumption may increase. Therefore, it is recommended to upgrade or replace the motor to enhance the overall energy efficiency of the equipment.
7. Reducing Equipment Wear
The smooth operation of the roller conveyor motor can reduce wear on other components of the equipment. For instance, if the motor operates unstably, it may cause premature wear on rollers, bearings, and other parts, increasing maintenance costs. Thus, in used pipe welding machines, the condition of the roller conveyor motor directly impacts the equipment's service life.
8. Automation Control
In modern pipe welding production lines, roller conveyor motors are often integrated with PLCs (Programmable Logic Controllers) and sensors to achieve automated control. In used pipe welding machines, if the roller conveyor motor supports automation functions, it can significantly improve production efficiency and product quality.
9. Safety
The stable operation of the roller conveyor motor is also closely related to production safety. If the motor fails, it may lead to material pile-ups, equipment jams, or even injuries. Therefore, in used pipe welding machines, the safety of the roller conveyor motor cannot be overlooked.
10. Maintenance and Care
In used pipe welding machines, the maintenance of the roller conveyor motor is particularly important. Since the equipment has been used for a certain period, the motor's performance may have declined. Regularly checking the motor's insulation, lubrication, and operating temperature can extend its service life and ensure stable equipment operation.
Conclusion
The roller conveyor motor plays a vital role in used pipe welding machines, with its functions covering material transportation, speed control, processing accuracy, energy efficiency, and more. For used equipment, the condition of the roller conveyor motor directly affects the overall performance and production efficiency of the equipment. Therefore,
In the production process of used welded pipe machines, the expanding machine is a crucial piece of equipment
Time of issue : 2025-03-04
1. Diameter Adjustment
After the welding of steel pipes is completed, due to thermal and mechanical stresses during the welding process, the diameter of the pipes may become uneven or fail to meet standards. The expanding machine adjusts the diameter of the pipes through mechanical or hydraulic means, ensuring it meets design specifications. This process not only improves the dimensional accuracy of the pipes but also ensures their interchangeability and compatibility in use.
2. Shape Correction
During the welding process, steel pipes may develop defects such as ovality, bending, or other shape irregularities. The expanding machine corrects these defects by applying uniform pressure, making the cross-section of the pipes more circular and thereby enhancing their overall quality and appearance.
3. Improvement of Mechanical Properties
During the expanding process, the inner and outer surfaces of the pipes are subjected to uniform stress, which helps eliminate residual stresses generated during welding and improves the mechanical properties of the pipes. For example, expanding can enhance the compressive and bending strength of the pipes, making them more suitable for use in high-stress environments.
4. Surface Quality Enhancement
The expanding machine can also polish the inner and outer surfaces of the pipes to some extent during the expanding process, removing burrs and oxide scales generated during welding. This improves the surface quality of the pipes, which is particularly important for applications requiring high surface quality, such as fluid or gas transportation.
5. Increased Production Efficiency
In the production line of used welded pipe machines, the use of an expanding machine can significantly improve production efficiency. Through automated or semi-automated expanding operations, manual intervention is reduced, production cycles are shortened, and production costs are lowered. Additionally, the high-precision operation of the expanding machine reduces the scrap rate, enhancing the overall efficiency of the production line.
6. Adaptability to Multiple Specifications
Expanding machines typically feature adjustable expanding ranges and pressure settings, allowing them to accommodate the production of pipes with different diameters and wall thicknesses. This flexibility enables used welded pipe machines to produce pipes of various specifications, meeting the diverse needs of customers.
7. Extended Equipment Lifespan
In used welded pipe machines, the use of an expanding machine can also extend the lifespan of other equipment. By correcting the shape and dimensions of the pipes, wear and damage to subsequent processing equipment are reduced, thereby prolonging the lifespan of the entire production line.
8. Environmental Protection and Energy Efficiency
Modern expanding machines often incorporate energy-saving designs and eco-friendly materials, reducing energy consumption and environmental pollution. In the production process of used welded pipe machines, the use of high-efficiency expanding machines not only lowers production costs but also aligns with the environmental requirements of modern industry.
Conclusion
The role of the expanding machine in used welded pipe machines cannot be overlooked. It not only improves the dimensional accuracy and shape quality of steel pipes but also enhances their mechanical properties, improves surface quality, boosts production efficiency, adapts to multiple specifications, extends equipment lifespan, and meets environmental and energy-saving requirements. Therefore, the expanding machine is an indispensable key piece of equipment in the production process of used welded pipe machines.
From the above analysis, it is clear that the expanding machine plays multiple roles and holds significant importance in used welded pipe machines. Whether from the perspective of product quality, production efficiency, or economic benefits, the expanding machine is a critical component.
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
1. Diameter Adjustment
After the welding of steel pipes is completed, due to thermal and mechanical stresses during the welding process, the diameter of the pipes may become uneven or fail to meet standards. The expanding machine adjusts the diameter of the pipes through mechanical or hydraulic means, ensuring it meets design specifications. This process not only improves the dimensional accuracy of the pipes but also ensures their interchangeability and compatibility in use.
2. Shape Correction
During the welding process, steel pipes may develop defects such as ovality, bending, or other shape irregularities. The expanding machine corrects these defects by applying uniform pressure, making the cross-section of the pipes more circular and thereby enhancing their overall quality and appearance.
3. Improvement of Mechanical Properties
During the expanding process, the inner and outer surfaces of the pipes are subjected to uniform stress, which helps eliminate residual stresses generated during welding and improves the mechanical properties of the pipes. For example, expanding can enhance the compressive and bending strength of the pipes, making them more suitable for use in high-stress environments.
4. Surface Quality Enhancement
The expanding machine can also polish the inner and outer surfaces of the pipes to some extent during the expanding process, removing burrs and oxide scales generated during welding. This improves the surface quality of the pipes, which is particularly important for applications requiring high surface quality, such as fluid or gas transportation.
5. Increased Production Efficiency
In the production line of used welded pipe machines, the use of an expanding machine can significantly improve production efficiency. Through automated or semi-automated expanding operations, manual intervention is reduced, production cycles are shortened, and production costs are lowered. Additionally, the high-precision operation of the expanding machine reduces the scrap rate, enhancing the overall efficiency of the production line.
6. Adaptability to Multiple Specifications
Expanding machines typically feature adjustable expanding ranges and pressure settings, allowing them to accommodate the production of pipes with different diameters and wall thicknesses. This flexibility enables used welded pipe machines to produce pipes of various specifications, meeting the diverse needs of customers.
7. Extended Equipment Lifespan
In used welded pipe machines, the use of an expanding machine can also extend the lifespan of other equipment. By correcting the shape and dimensions of the pipes, wear and damage to subsequent processing equipment are reduced, thereby prolonging the lifespan of the entire production line.
8. Environmental Protection and Energy Efficiency
Modern expanding machines often incorporate energy-saving designs and eco-friendly materials, reducing energy consumption and environmental pollution. In the production process of used welded pipe machines, the use of high-efficiency expanding machines not only lowers production costs but also aligns with the environmental requirements of modern industry.
Conclusion
The role of the expanding machine in used welded pipe machines cannot be overlooked. It not only improves the dimensional accuracy and shape quality of steel pipes but also enhances their mechanical properties, improves surface quality, boosts production efficiency, adapts to multiple specifications, extends equipment lifespan, and meets environmental and energy-saving requirements. Therefore, the expanding machine is an indispensable key piece of equipment in the production process of used welded pipe machines.
From the above analysis, it is clear that the expanding machine plays multiple roles and holds significant importance in used welded pipe machines. Whether from the perspective of product quality, production efficiency, or economic benefits, the expanding machine is a critical component.
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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Company address:No. A99, East Lecong Avenue, Lecong Town, Foshan City, Guangdong Province
Wechat: 13392281699
Email: zty@usedpipemill.com
Company address:No. A99, East Lecong Avenue, Lecong Town, Foshan City, Guangdong Province
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