Common welding defects of high frequency welded pipe equipment (3)
- Sort:Information
- Auth:
- Source:
- Release time:2022-04-13 11:30
- Pvs:
【概要描述】There may be various defects in the high frequency welded pipe equipment, and the names of defects are not completely uniform. Combined with the characteristics of our welded pipe production, the defects that often occur are as follows:①Inclusions; ②Insufficient fusion; ③Stick welding; ④Cast welding;Not all of these defects are present, but they are often found in high-frequency welded pipes.
Common welding defects of high frequency welded pipe equipment (3)
【概要描述】There may be various defects in the high frequency welded pipe equipment, and the names of defects are not completely uniform. Combined with the characteristics of our welded pipe production, the defects that often occur are as follows:①Inclusions; ②Insufficient fusion; ③Stick welding; ④Cast welding;Not all of these defects are present, but they are often found in high-frequency welded pipes.
- Sort:Information
- Auth:
- Source:
- Release time:2022-04-13 11:30
- Pvs:
There may be various defects in the high frequency welded pipe equipment, and the names of defects are not completely uniform. Combined with the characteristics of our welded pipe production, the defects that often occur are as follows:
①Inclusions; ②Insufficient fusion; ③Stick welding; ④Cast welding;
Not all of these defects are present, but they are often found in high-frequency welded pipes.
The schematic diagrams provided below are not actual pictures of each defect, and are mainly used to illustrate the main characteristics of the defect, and do not mistakenly believe that welding defects are only produced under a specific process condition. The defect shown in the text is the fracture morphology of the weld cracked by the flattening test.
Other common welding defects of high frequency welded pipe equipment can be divided into ① casting welding (brittle welding); ② porosity (pinhole); ③ jump welding.
Cast welding (brittle welding)
Casting welding means that the molten metal on the joint surface is not fully discharged, and the as-cast metal on the fusion surface contains metal oxides like peroxidation, and the fracture morphology changes according to the residual as-cast metal content. Now most of them show flat and brittle morphology, and metallographic inspection can see that there is as-cast metal on the joint surface, as shown in Figure 11. The cast welded pipe cracks when it is flattened.
Preventive measures for casting welding:
①Increase welding discharge;
②Increase the width of the steel strip.
Air holes (pinholes)
The pores on the welding joint surface of the high frequency welded pipe equipment are caused by high temperature welding but insufficient discharge. The fracture morphology is fibrous, and the spherical bright white dots are randomly distributed on the entire fracture. When the white dots appear on the outer wall, the surface phenomenon of the white dots turns black due to oxidation. As shown in Figure 12.
Small pores can be seen before the outer burr is removed, and pores can also be seen on the fusion line after the outer burr is removed.
Preventive measures for stomata:
①Reduce welding input;
②Increase the amount of extrusion.
Jump welding
There are various forms of jump welding, as shown in Figure 13.
Usually, such defects are distributed regularly and continuously, and the defects outside the wall thickness are similar to wavy defects, and the spacing is generally equidistant.
Precautions for jump welding:
① Filter equipment to increase welding current;
②Check the input voltage;
③ Check the rollers and shafts.
Part of the content of this site comes from the Internet. This site only provides information storage. The copyright belongs to the original author. It does not bear the relevant legal responsibility and does not represent the views and positions of this site. Please contact and delete it if there is any infringement.
More News
Time of issue : 2024-12-05
1.Theoretical Training:
Equipment knowledge: Understand the basic components of the slitting unit and its working principle.
Operation specifications: Familiar with the operation procedures, including starting, stopping, adjusting parameters, common problem handling, etc.
Safety training: Understand the safety risks in equipment operation and corresponding preventive measures, and be familiar with emergency handling methods in emergency situations.
2.Practical operation:
On-site operation demonstration: An experienced operator gives a demonstration on site to guide new employees to master basic operating skills.
Hands-on practice: Let new employees operate the equipment themselves, accumulate experience in actual operation, and solve the problems encountered.
3.Maintenance:
Daily inspection: Train employees to understand the contents and methods of daily inspection of equipment, including cleaning, lubrication, fastening and other work.
Troubleshooting: Teach employees how to identify common equipment failures, understand basic troubleshooting methods and when professional maintenance personnel are required to intervene.
4.Efficiency optimization:
Production Management: Explain how to rationally arrange production tasks to improve equipment utilization and production efficiency.
Data Analysis: Teach employees how to record and analyze production data to find and improve the weak links in production.
5.Assessment and continuous improvement:
Assessment: Evaluate the effectiveness of training through examinations or practical assessments to ensure that employees have the necessary knowledge and skills.
Continuous improvement: Regularly organize training review and skill upgrading courses, and constantly improve the training content according to the actual production and equipment update.
After the training, new employees can work under the supervision of an experienced operator until they are fully competent.
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.Theoretical Training:
Equipment knowledge: Understand the basic components of the slitting unit and its working principle.
Operation specifications: Familiar with the operation procedures, including starting, stopping, adjusting parameters, common problem handling, etc.
Safety training: Understand the safety risks in equipment operation and corresponding preventive measures, and be familiar with emergency handling methods in emergency situations.
2.Practical operation:
On-site operation demonstration: An experienced operator gives a demonstration on site to guide new employees to master basic operating skills.
Hands-on practice: Let new employees operate the equipment themselves, accumulate experience in actual operation, and solve the problems encountered.
3.Maintenance:
Daily inspection: Train employees to understand the contents and methods of daily inspection of equipment, including cleaning, lubrication, fastening and other work.
Troubleshooting: Teach employees how to identify common equipment failures, understand basic troubleshooting methods and when professional maintenance personnel are required to intervene.
4.Efficiency optimization:
Production Management: Explain how to rationally arrange production tasks to improve equipment utilization and production efficiency.
Data Analysis: Teach employees how to record and analyze production data to find and improve the weak links in production.
5.Assessment and continuous improvement:
Assessment: Evaluate the effectiveness of training through examinations or practical assessments to ensure that employees have the necessary knowledge and skills.
Continuous improvement: Regularly organize training review and skill upgrading courses, and constantly improve the training content according to the actual production and equipment update.
After the training, new employees can work under the supervision of an experienced operator until they are fully competent.
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
Time of issue : 2024-12-04
1.Installation and commissioning:
Position selection: According to the layout and process requirements of the production line, the installation position of the looping clip motor is reasonably selected.
Fixed and connected: Install the motor firmly in the designated position, and connect it with the corresponding mechanical transmission components.
Electrical wiring: Correct wiring to ensure reliable connection between the motor and the control system.
2.Start and Stop:
Check before starting: Check the lubrication state of the motor and transmission parts, whether the fasteners are loose, and whether the electrical line is normal.
Smooth start: When starting the motor, it should avoid the impact of instantaneous large current, and use soft start or frequency conversion start.
Normal shutdown: The shutdown should gradually reduce the speed of the motor to prevent sudden stop from impacting the equipment.
3.Operation and control:
Constant tension: The tension control system is used to maintain a constant tension during the operation of the looping motor to avoid strip relaxation or pulling.
Speed synchronization: Adjust the running speed of the motor according to the process requirements, so that it matches the speed of the equipment before and after the process.
Feedback control: Through the sensor and feedback system, real-time monitoring of the motor operating status, adjust the parameters to ensure the stable operation of the production line.
4.Maintenance and maintenance:
Regular inspection: Regularly check the wear of the motor and transmission parts, and replace the damaged parts in time.
Lubrication maintenance: Regular lubrication maintenance of mechanical parts to ensure their good operation.
Clean and dust-proof: Keep the motor and control cabinet clean to prevent dust and debris from entering, affecting the performance of the equipment.
5.Troubleshooting:
Fault diagnosis: When there is a fault, professional detection equipment is used to diagnose the motor and determine the cause of the fault.
Timely repair: Repair or replace the fault part according to the diagnosis results to ensure that the equipment returns to normal work as soon as possible.
In short, the correct use and maintenance of the looper clip motor is crucial to ensure the efficient and stable operation of the metal processing line.
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.Installation and commissioning:
Position selection: According to the layout and process requirements of the production line, the installation position of the looping clip motor is reasonably selected.
Fixed and connected: Install the motor firmly in the designated position, and connect it with the corresponding mechanical transmission components.
Electrical wiring: Correct wiring to ensure reliable connection between the motor and the control system.
2.Start and Stop:
Check before starting: Check the lubrication state of the motor and transmission parts, whether the fasteners are loose, and whether the electrical line is normal.
Smooth start: When starting the motor, it should avoid the impact of instantaneous large current, and use soft start or frequency conversion start.
Normal shutdown: The shutdown should gradually reduce the speed of the motor to prevent sudden stop from impacting the equipment.
3.Operation and control:
Constant tension: The tension control system is used to maintain a constant tension during the operation of the looping motor to avoid strip relaxation or pulling.
Speed synchronization: Adjust the running speed of the motor according to the process requirements, so that it matches the speed of the equipment before and after the process.
Feedback control: Through the sensor and feedback system, real-time monitoring of the motor operating status, adjust the parameters to ensure the stable operation of the production line.
4.Maintenance and maintenance:
Regular inspection: Regularly check the wear of the motor and transmission parts, and replace the damaged parts in time.
Lubrication maintenance: Regular lubrication maintenance of mechanical parts to ensure their good operation.
Clean and dust-proof: Keep the motor and control cabinet clean to prevent dust and debris from entering, affecting the performance of the equipment.
5.Troubleshooting:
Fault diagnosis: When there is a fault, professional detection equipment is used to diagnose the motor and determine the cause of the fault.
Timely repair: Repair or replace the fault part according to the diagnosis results to ensure that the equipment returns to normal work as soon as possible.
In short, the correct use and maintenance of the looper clip motor is crucial to ensure the efficient and stable operation of the metal processing line.
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
Time of issue : 2024-12-03
1.Basic construction: A typical roller type bedroom spiral hoop usually consists of two sets of rollers that form a spiral shaped channel for guiding and supporting the metal strip.
2.Operation principle: When the metal strip passes through the looper, the strip is guided and supported in the spiral path. Due to the spiral structure of the looper, the strip can be smoothly transmitted under the condition of uneven strip speed to ensure the normal progress of the subsequent process.
3.Commissioning and maintenance: Used equipment needs to be inspected and maintained in detail before use. Includes:
Cleaning: Remove oil, dust and so on from the surface.
Lubrication: Check and add lubricating oil to ensure the normal operation of each transmission component.
Calibration: Ensure that the neutralization pressure of the roller is set correctly.
Replacement parts: Check for wear and replace necessary parts.
4.Application process: In the process of use, it is necessary to pay attention to the operation specifications, monitor the operating status of the equipment, and adjust the equipment parameters in time to meet the strip specifications and process requirements. In addition, it is also necessary to pay attention to safe operation to prevent accidents.
Through the above methods, the used roller bedroom spiral looper can continue to play its function and provide support for metal processing production.
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.Basic construction: A typical roller type bedroom spiral hoop usually consists of two sets of rollers that form a spiral shaped channel for guiding and supporting the metal strip.
2.Operation principle: When the metal strip passes through the looper, the strip is guided and supported in the spiral path. Due to the spiral structure of the looper, the strip can be smoothly transmitted under the condition of uneven strip speed to ensure the normal progress of the subsequent process.
3.Commissioning and maintenance: Used equipment needs to be inspected and maintained in detail before use. Includes:
Cleaning: Remove oil, dust and so on from the surface.
Lubrication: Check and add lubricating oil to ensure the normal operation of each transmission component.
Calibration: Ensure that the neutralization pressure of the roller is set correctly.
Replacement parts: Check for wear and replace necessary parts.
4.Application process: In the process of use, it is necessary to pay attention to the operation specifications, monitor the operating status of the equipment, and adjust the equipment parameters in time to meet the strip specifications and process requirements. In addition, it is also necessary to pay attention to safe operation to prevent accidents.
Through the above methods, the used roller bedroom spiral looper can continue to play its function and provide support for metal processing production.
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
Time of issue : 2024-11-30
1.Molding die: used to shape steel strip into pipe. This type of mold usually consists of multiple sets of rollers, and the forming process is completed by gradual pressure.
2.Welding die: Specially used for high-frequency welding process to ensure the quality and accuracy of the weld. These molds are often used to ensure that the joint parts of the pipe are precisely aligned and soldered securely.
3.Sizing die: used for further sizing and straightening of the pipe after welding to ensure the dimensional accuracy of the final product. These molds allow the pipe to achieve the desired diameter and roundness.
4.Shaping mold: used to shape the welded pipe that has been formed to ensure that it meets the specified size and shape requirements.
5.Straightening mold: used to straighten the welded pipe and correct the bending and deformation of the pipe to ensure its flatness in the production process.
6.Surface treatment mold: These molds are used to treat the surface of the pipe, such as deburring, polishing, etc., to ensure the smooth and smooth surface of the pipe.
7.Cutting mold: used to cut the produced welded pipe to the required length according to demand. The main function of these molds is to ensure that the cutting is straight and high precision.
Each mold plays an important role in the production process, ensuring the quality and production efficiency of the welded pipe. According to the specific use and needs, different types of molds can be combined to achieve the best production results.
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.Molding die: used to shape steel strip into pipe. This type of mold usually consists of multiple sets of rollers, and the forming process is completed by gradual pressure.
2.Welding die: Specially used for high-frequency welding process to ensure the quality and accuracy of the weld. These molds are often used to ensure that the joint parts of the pipe are precisely aligned and soldered securely.
3.Sizing die: used for further sizing and straightening of the pipe after welding to ensure the dimensional accuracy of the final product. These molds allow the pipe to achieve the desired diameter and roundness.
4.Shaping mold: used to shape the welded pipe that has been formed to ensure that it meets the specified size and shape requirements.
5.Straightening mold: used to straighten the welded pipe and correct the bending and deformation of the pipe to ensure its flatness in the production process.
6.Surface treatment mold: These molds are used to treat the surface of the pipe, such as deburring, polishing, etc., to ensure the smooth and smooth surface of the pipe.
7.Cutting mold: used to cut the produced welded pipe to the required length according to demand. The main function of these molds is to ensure that the cutting is straight and high precision.
Each mold plays an important role in the production process, ensuring the quality and production efficiency of the welded pipe. According to the specific use and needs, different types of molds can be combined to achieve the best production results.
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
Wechat: 13392281699
Email: zty@usedpipemill.com
Company address:No. A99, East Lecong Avenue, Lecong Town, Foshan City, Guangdong Province