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Used round pipe to square pipe machines, solutions of thick-walled pipe forming（1）
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- Release time：2021-10-19 12:00
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【概要描述】In the welded pipe industry, people generally regard welded pipes with a ratio of wall thickness to outside diameter of 12%≤t/D≤18% as thick-walled pipes. Regarding the forming difficulties of thick-walled pipes with used round pipe to square pipe machines, they clearly propose Solutions such as the edge double-semi-warp forming hole shape.
Used round pipe to square pipe machines, solutions of thick-walled pipe forming（1）
【概要描述】In the welded pipe industry, people generally regard welded pipes with a ratio of wall thickness to outside diameter of 12%≤t/D≤18% as thick-walled pipes. Regarding the forming difficulties of thick-walled pipes with used round pipe to square pipe machines, they clearly propose Solutions such as the edge double-semi-warp forming hole shape.
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- Source:
- Release time：2021-10-19 12:00
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Detail
In the welded pipe industry, people generally regard welded pipes with a ratio of wall thickness to outside diameter of 12%≤ t/D≤ 18% as thick-walled pipes. Regarding the forming difficulties of thick-walled pipes with used round pipe to square pipe machines, they clearly propose Solutions such as the edge double-semi-warp forming hole shape.
Difficulties in processing technology of thick-walled pipe deformation：
There are three processing technology problems for thick-walled welded pipe forming with the used round pipe to square pipe machines: 1、The large bending springback, 2、Is the actual deformation blind zone is wide, 3、The large difference between the inner and outer circumferences.
Bending resilience is large:
the tube blank will produce two kinds of deformation, elastic deformation and plastic deformation, in the process of bending the tube blank from a straight condition into a cylindrical shape. In addition, it is inevitable to produce springback, the key is how much. Thick-walled pipes have large deformation resistance and much springback, resulting in insufficient pipe blank deformation.
Affected by the mechanical properties of the tube blank, the wall-to-diameter ratio (t/D), the main parameters of the pass, the characteristics of the machine and equipment, the actual operation error, etc., the springback regularity is very different, so it is difficult to accurately predict and analyze the springback amount. Give precise springback compensation. At this stage, there are roughly two commonly used methods for characterizing springback:
- Actual measurement characterizatio: According to the evaluation of the chord length difference △b before and after springback at the same point on the edge of the deformed tube blank and the two index values of the semi-longitude difference △R before and after springback at the bending position, it is characterized by referring to the formula to calculate the following: specific accurate measurement of the characterization value is more intuitive , The most widely used.
- Function representation. According to the basic theory of bending neutralization layer and the basic theory of metal elastoplastic deformation, the correlation between the deformation of the deformed tube before and after springback can be calculated. Refer to the formula to calculate the following:
The theoretical significance of the second calculation formula is that according to the deformation half-warp of the tube blank after springback, the yield strength of the tube blank, the thickness of the tube blank, the springback angle and the metal modulus, the required pass bending deformation radius R can be directly calculated. In turn, the adverse effects of springback on the formed tube are eliminated.
Deformation blind zone width
Deformation dead zone, also known as deformation dead zone, means that in the process of tube blank deformation, no matter how it deforms, there is no way to deform at the edge of the tube blank and the area whose width is equal to the thickness of the tube blank. In fact, a part of the road sections adjacent to the deformation blind zone of the basic theory also belong to the range of the deformation blind zone. The existence of the deformation blind zone has its inevitable trend.
- There is an inevitable trend of deformation blind zone. The bending and deformation of the edge of the tube blank can be analyzed and studied with reference to the basic theory of bending stiffness. When a billet with a thickness of t has to bend and deform a billet with a length of L under the action of the forming and rolling force P, the positioning point of the section of the billet will definitely cause a vertical displacement y, that is, the billet will bend and deform. Calculate the bending deformation radius of the tube blank. When forming a thick-walled pipe of Φ60mm X 6mm, the calculation results show that in order to produce a bending deformation of only 0.001cm in the width of the thickness area (0.6cm), a forming force of 48kN is required. This is for welded pipe forming equipment. It is impossible to provide; what's more, according to the welding pipe forming process, the closer to the edge of the tube blank, the smaller the specific forming force acting on the tube blank, which in turn causes the specific deformation blind zone to be wider.
In addition, from the perspective of the specific deformation effect, a bending deformation of 0.001 cm should be completed in a length of 0.6 cm, and the bending radius R is equal to 30 cm. The arc length of 0.6 cm is the same as a straight line on an arc with a half meridian of 30 cm.
- Comparison of deformation blind zone. Both thick-walled pipes and thin-walled pipes have deformation blind zones; only thick-walled pipes' deformation blind zones account for a higher proportion of the total width of the tube blank. Taking Φ60mm X 3mm and Φ60mm X 6mm as examples, their blind zone width ratios of 2t /B (%) are 3.24% and 6.89%, respectively, and the latter is twice that of the previous one. Therefore, according to the calculation formula of the total opening width of the deformation blind zone, the total width of the trench on both sides of the wall thickness can be obtained as 0.64mm (tube inner diameter r2=27.87mm) and 2.79mm (tube inner diameter r2=25.08mm), the latter being 4.36 times of the former, the influence of such a wide groove on the thick-walled pipe of the used round pipe to square pipe machines on the weld strength is obvious.
Large difference in diameter between inside and outside
Still taking the Φ60mm X 6mm thick-walled pipe as an example, the difference between the inner and outer circumferences is 37.68mm, while the difference between the inner and outer circumferences of the Φ60mm X 3mm standard wall thickness pipe is only 18.84mm. A pipe with a large circumference difference represents a large amount of internal axial stress accumulated in the formed tube. The process of compressing the inner layer and stretching the outer layer requires a lot of deformation work, and its increased deformation resistance has an impact on the unit. Both the drag output power and the rigidity of the unit have special requirements. After welding, the large amount of compressive stress accumulated on the inner side of the neutral layer of the pipeline always tries to open the weld; in addition, the large amount of tensile stress accumulated on the outer side of the neutral layer is always pulling the weld, trying to get rid of the weld. In addition, the actual effects of these two stresses on the welding seam are the same, with superimposing effects. These accumulated stresses in thick-wall welded pipes cause serious stress corrosion damage to the weld seam, and have great potential safety hazards, which must be solved by the welded pipe forming process.
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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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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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