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Three important links of quality control in the production process of high frequency welded pipe equipment (1)
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【概要描述】In the production process of making steel pipes on the high frequency welded pipe equipment production line, three links of raw materials, welding technology and roll adjustment should be focused on control.
Three important links of quality control in the production process of high frequency welded pipe equipment (1)
【概要描述】In the production process of making steel pipes on the high frequency welded pipe equipment production line, three links of raw materials, welding technology and roll adjustment should be focused on control.
- Sort：Information
- Auth:
- Source:
- Release time：2022-10-23 11:30
- Pvs：
Detail
In the production process of making steel pipes on the high frequency welded pipe equipment production line, three links of raw materials, welding technology and roll adjustment should be focused on control.
The used high frequency tube mills must first control the raw materials
The results of causal analysis of scrap steel pipes show that the main factors affecting the quality of raw materials are the instability of the mechanical properties of the steel strip, the surface defects of the steel strip and the large deviation of geometric dimensions.
1. The influence of the mechanical properties of the steel strip on the quality of the steel pipe
The commonly used steel grades for welded steel pipes are carbon structural steels. The main grades are Q195, Q215, and Q235, and their mechanical properties are specified in the following table.
Mechanical properties of three kinds of carbon structural steel pipes
The high yield point and tensile strength of the steel strip will cause difficulty in forming the steel strip, especially when the pipe wall is thick, the material has a large resilience, the steel pipe has a large deformation stress during welding, and the weld is prone to cracks. When the tensile strength of the steel strip exceeds 635MPa and the elongation is less than 10%, the weld seam of the steel strip is prone to cracking during the welding process. When the tensile strength is lower than 300Mpa, the surface of the steel strip is prone to wrinkles due to the soft material during the forming process, especially when welding steel pipes with a diameter of more than 60mm, obvious and regular ring-shaped wrinkles appear on the surface of the steel pipe. When the wrinkles are severe, the entire batch of steel pipes will be scrapped. It can be seen that the mechanical properties of materials have a great influence on the quality of steel pipes, and the quality of steel pipes should be effectively controlled from the aspect of material strength.
2. The influence of steel strip surface defects on the quality of steel pipes
Common surface defects of steel strip include sickle bend, wave shape, slitting gnawing, etc. The sickle bend and wave shape generally appear in the rolling process of cold-rolled steel strip and are caused by improper reduction control. In the forming process of the steel pipe made by the high frequency welded pipe equipment, the sickle bend and the wave shape will cause the strip steel to deviate or turn over, which will easily cause lap welding of the steel pipe weld and affect the quality of the steel pipe. The gnawing edge of the steel belt (that is, the phenomenon that the edge of the steel belt is jagged and uneven) generally appears on the slitting belt. The reason is that the blade of the slitting machine is blunt or not sharp. Due to the gnawing of the steel strip, local meat shortages often occur, which makes the steel strip prone to cracks and cracks during welding, which affect the stability of the weld quality.
3. The influence of the geometrical size of the steel strip on the quality of the steel pipe
When the width of the steel strip is less than the allowable deviation, the squeezing force when welding the steel pipe is reduced, so that the welding seam of the steel pipe is not firmly welded, cracks or open pipes; when the width of the steel strip is greater than the allowable deviation, the welding of the steel pipe The squeezing force increases, and welding defects such as sharp beaks, lap welding or burrs appear at the welding seam of the steel pipe. Therefore, the fluctuation of the width of the steel strip not only affects the accuracy of the outer diameter of the steel pipe, but also seriously affects the surface quality of the steel pipe. For steel pipes that require the same section wall thickness difference not to exceed the specified value, both the steel pipe with a high degree of wall thickness uniformity, and the fluctuation of the thickness of the steel strip, the allowable value of the thickness difference of the same coil will be transferred to the wall thickness difference of the finished steel pipe. , So that the thickness of a large number of steel pipes exceeds the allowable deviation and is rejected. The fluctuation of the thickness not only affects the thickness accuracy of the finished steel pipe, but at the same time, due to the different thickness of the steel strip, the extrusion force and welding temperature of the steel pipe are unstable when the steel pipe is welded, which causes the quality of the weld seam to be unstable when the steel pipe is welded.
In addition, due to material defects such as interlayers, impurities, and blisters in the steel, it is also an important factor affecting the quality of the steel pipe. Therefore, before welding the steel strip with the high frequency welded pipe equipment, check the surface quality and geometric dimensions of each coil of steel strip. If the quality of the steel strip does not meet the standard requirements, do not carry out production to avoid unnecessary losses.
The three important links of raw material, welding and roll adjustment in the production process of welded steel pipes are carried out on the high frequency welded pipe equipment. If strict control is implemented, the quality of welded pipes will be effectively improved.
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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
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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.
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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.
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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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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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Email: zty@usedpipemill.com
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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