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Learn about the solutions for thick-wall pipe forming of directly forming to square pipe mill(1)

Learn about the solutions for thick-wall pipe forming of directly forming to square pipe mill(1)

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  • Release time:2022-08-19 11:30
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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 directly forming to square pipe mill, they clearly propose Solutions such as the edge double-semi-warp forming hole shape.

Learn about the solutions for thick-wall pipe forming of directly forming to square pipe mill(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 directly forming to square pipe mill, they clearly propose Solutions such as the edge double-semi-warp forming hole shape.

  • Sort:Information
  • Auth:
  • Source:
  • Release time:2022-08-19 11:30
  • Pvs:
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 directly forming to square pipe mill, 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 directly forming to square pipe mill: 1、The large bending springback. 2、The actual deformation blind zone is wide. 3、The large difference between the inner and outer circumferences.

 

Directly forming to square pipe mill

 

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:

 

①Actual 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

 

Directly forming to square pipe mill

 

②Function 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:

 

Directly forming to square pipe mill

 

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.

 

①There 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.

 

②Comparison 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 thedirectly forming to square pipe mill 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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A thorough evaluation before purchasing a used pipe welding machine
A thorough evaluation before purchasing a used pipe welding machine
Before purchasing a second-hand pipe welding machine, it is necessary to conduct a comprehensive evaluation to ensure the performance, cost performance and suitability of the equipment. Here are the key assessment steps:

1.Equipment condition check
Appearance inspection: Check whether the equipment has obvious damage, rust or deformation.
Core component inspection: Focus on inspecting key components such as welding joints, transmission systems, and electrical systems to ensure that there is no serious wear or failure.
Operation test: Conduct trial operation to observe whether the equipment runs smoothly and whether the welding quality meets the requirements.

2.Equipment history
Service life: Understand the use time of the equipment, usually the longer the service life, the higher the risk of failure.
Maintenance records: Check the maintenance and repair records of the equipment to determine whether it is well maintained.
Working environment: Understand the working environment before the equipment, harsh environment may lead to increased equipment wear.

3.Technical parameters
Production capacity: Confirm whether the production capacity of the equipment meets the demand, including welding speed, pipe diameter range, etc.
Accuracy requirements: Check the welding accuracy of the equipment to ensure that it meets the production standard.
Compatibility: Confirm whether the equipment can be adapted to existing production lines or raw materials.

4.Brand and model
Brand reputation: Choose a well-known brand, usually the quality and after-sales service is more guaranteed.
Model suitability: Ensure that the model is suitable for current production needs and avoid insufficient or excessive functions.

5.Price evaluation
Market conditions: Understand the market price of the same type of equipment, to avoid too high or too low prices.
Cost performance: Considering the equipment condition, performance and price, choose cost-effective equipment.

6.After-sales service
Warranty Period: Confirm whether the equipment is under warranty, or whether the warranty can be extended.
Technical Support: Find out if the supplier provides technical support or repair services.
Accessories supply: Confirm that equipment accessories are easy to obtain to avoid the risk of stopping production.

7.Legal and Compliance
Equipment legitimacy: Ensure that the source of equipment is legitimate, avoid buying stolen goods or illegal equipment.
Compliance: Verify that the equipment meets local safety standards and environmental requirements.

8.Supplier reputation
Supplier background: Choose suppliers with good reputation to reduce the risk of purchase.
User Reviews: View other users' reviews of suppliers to understand their service quality and equipment condition.

9.Transportation and installation
Transportation costs: Consider the transportation costs of equipment, especially large equipment.
Installation and commissioning: Confirm whether the supplier provides installation and commissioning services to ensure the normal use of the equipment.

10.Contract Terms
Clear terms: Ensure that key information such as equipment condition, price, warranty period, etc. is clear in the contract.
Return Policy: Understand the return policy to avoid the inability to return if the equipment does not meet the requirements.

Summary
The purchase of second-hand pipe welding machine needs to consider the equipment status, history, technical parameters, price, after-sales service and other factors to ensure that the equipment meets the production demand and is cost-effective.

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 
Detail
Before purchasing a second-hand pipe welding machine, it is necessary to conduct a comprehensive evaluation to ensure the performance, cost performance and suitability of the equipment. Here are the key assessment steps:

1.Equipment condition check
Appearance inspection: Check whether the equipment has obvious damage, rust or deformation.
Core component inspection: Focus on inspecting key components such as welding joints, transmission systems, and electrical systems to ensure that there is no serious wear or failure.
Operation test: Conduct trial operation to observe whether the equipment runs smoothly and whether the welding quality meets the requirements.

2.Equipment history
Service life: Understand the use time of the equipment, usually the longer the service life, the higher the risk of failure.
Maintenance records: Check the maintenance and repair records of the equipment to determine whether it is well maintained.
Working environment: Understand the working environment before the equipment, harsh environment may lead to increased equipment wear.

3.Technical parameters
Production capacity: Confirm whether the production capacity of the equipment meets the demand, including welding speed, pipe diameter range, etc.
Accuracy requirements: Check the welding accuracy of the equipment to ensure that it meets the production standard.
Compatibility: Confirm whether the equipment can be adapted to existing production lines or raw materials.

4.Brand and model
Brand reputation: Choose a well-known brand, usually the quality and after-sales service is more guaranteed.
Model suitability: Ensure that the model is suitable for current production needs and avoid insufficient or excessive functions.

5.Price evaluation
Market conditions: Understand the market price of the same type of equipment, to avoid too high or too low prices.
Cost performance: Considering the equipment condition, performance and price, choose cost-effective equipment.

6.After-sales service
Warranty Period: Confirm whether the equipment is under warranty, or whether the warranty can be extended.
Technical Support: Find out if the supplier provides technical support or repair services.
Accessories supply: Confirm that equipment accessories are easy to obtain to avoid the risk of stopping production.

7.Legal and Compliance
Equipment legitimacy: Ensure that the source of equipment is legitimate, avoid buying stolen goods or illegal equipment.
Compliance: Verify that the equipment meets local safety standards and environmental requirements.

8.Supplier reputation
Supplier background: Choose suppliers with good reputation to reduce the risk of purchase.
User Reviews: View other users' reviews of suppliers to understand their service quality and equipment condition.

9.Transportation and installation
Transportation costs: Consider the transportation costs of equipment, especially large equipment.
Installation and commissioning: Confirm whether the supplier provides installation and commissioning services to ensure the normal use of the equipment.

10.Contract Terms
Clear terms: Ensure that key information such as equipment condition, price, warranty period, etc. is clear in the contract.
Return Policy: Understand the return policy to avoid the inability to return if the equipment does not meet the requirements.

Summary
The purchase of second-hand pipe welding machine needs to consider the equipment status, history, technical parameters, price, after-sales service and other factors to ensure that the equipment meets the production demand and is cost-effective.

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 
The connection between pipe welding mechanism and furniture industry,
The connection between pipe welding mechanism and furniture industry,
There is a close relationship between pipe (steel pipe manufactured by welding process) and the furniture industry, especially in modern furniture design and manufacturing, welded pipe is more and more widely used. The following are the main relationships and specific applications of the two:

1. Material basis: Welded pipe as the skeleton material of furniture
Structural support: Steel pipes made of welded pipes are often used in the frame structure of furniture, such as chair legs, table supports, bed frames, bookshelves, etc. Its high strength and stability can withstand large loads.
Lightweight design: Compared with solid steel, welded pipe is lightweight and low cost, suitable for furniture requiring portability or simple design (such as outdoor folding tables and chairs).

2. Design flexibility
Diversified modeling: Welded pipes can be processed into complex shapes through bending, cutting, welding and other processes to meet the curve or geometric design needs of modern furniture (such as streamlined bar chairs, creative shelves).
Industrial style: The exposed metal welded pipe structure is the iconic element of industrial furniture, often used in cafes, LOFT Spaces and other scenes.

3. Functionality and durability
Outdoor furniture: Galvanized welded pipes or steel pipes treated with anti-rust are often used in outdoor furniture (such as garden tables and chairs, balcony guardrail), with strong weather resistance.
Load-bearing requirements: The high strength characteristics of welded pipes are suitable for the production of storage shelves, shelves and other furniture requiring high load-bearing.

4. Production process coordination
Mass production: The efficient production mode of welded pipe mechanism is matched with the large-scale demand of furniture manufacturing, reducing raw material costs.
Customized processing: Furniture factories can customize welded pipes of different specifications (such as diameter and wall thickness) according to design requirements to improve product adaptability.

5. Environmental Protection and Sustainability
Material recycling: Steel can be recycled, in line with the design concept of environmentally friendly furniture.
Surface treatment: Spraying, painting and other processes can improve the beauty and durability of welded pipe furniture, while reducing the environmental burden.

6. Market trends
Modular furniture: The standardized interface of welded pipe structure is easy to assemble and disassemble, catering to the popular trend of modular furniture.
Cross-border combination: Welded pipes are often combined with wood, glass, plastic and other materials to create a mixed-match style (such as metal + wood dining tables).

Typical Application Case
Office furniture: Steel desk bracket, conference chair frame.
Home Decoration: Metal bookshelf, coat rack, lamp stand.
Public Facilities: Park benches, shopping mall display shelves.

Summary
The welded pipe mechanism provides the furniture industry with an economical, durable and flexible material solution that drives innovation in the function, aesthetics and sustainability of modern furniture. Its combination with furniture is not only an extension of industrial technology, but also an expansion of design language.

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 
Detail
There is a close relationship between pipe (steel pipe manufactured by welding process) and the furniture industry, especially in modern furniture design and manufacturing, welded pipe is more and more widely used. The following are the main relationships and specific applications of the two:

1. Material basis: Welded pipe as the skeleton material of furniture
Structural support: Steel pipes made of welded pipes are often used in the frame structure of furniture, such as chair legs, table supports, bed frames, bookshelves, etc. Its high strength and stability can withstand large loads.
Lightweight design: Compared with solid steel, welded pipe is lightweight and low cost, suitable for furniture requiring portability or simple design (such as outdoor folding tables and chairs).

2. Design flexibility
Diversified modeling: Welded pipes can be processed into complex shapes through bending, cutting, welding and other processes to meet the curve or geometric design needs of modern furniture (such as streamlined bar chairs, creative shelves).
Industrial style: The exposed metal welded pipe structure is the iconic element of industrial furniture, often used in cafes, LOFT Spaces and other scenes.

3. Functionality and durability
Outdoor furniture: Galvanized welded pipes or steel pipes treated with anti-rust are often used in outdoor furniture (such as garden tables and chairs, balcony guardrail), with strong weather resistance.
Load-bearing requirements: The high strength characteristics of welded pipes are suitable for the production of storage shelves, shelves and other furniture requiring high load-bearing.

4. Production process coordination
Mass production: The efficient production mode of welded pipe mechanism is matched with the large-scale demand of furniture manufacturing, reducing raw material costs.
Customized processing: Furniture factories can customize welded pipes of different specifications (such as diameter and wall thickness) according to design requirements to improve product adaptability.

5. Environmental Protection and Sustainability
Material recycling: Steel can be recycled, in line with the design concept of environmentally friendly furniture.
Surface treatment: Spraying, painting and other processes can improve the beauty and durability of welded pipe furniture, while reducing the environmental burden.

6. Market trends
Modular furniture: The standardized interface of welded pipe structure is easy to assemble and disassemble, catering to the popular trend of modular furniture.
Cross-border combination: Welded pipes are often combined with wood, glass, plastic and other materials to create a mixed-match style (such as metal + wood dining tables).

Typical Application Case
Office furniture: Steel desk bracket, conference chair frame.
Home Decoration: Metal bookshelf, coat rack, lamp stand.
Public Facilities: Park benches, shopping mall display shelves.

Summary
The welded pipe mechanism provides the furniture industry with an economical, durable and flexible material solution that drives innovation in the function, aesthetics and sustainability of modern furniture. Its combination with furniture is not only an extension of industrial technology, but also an expansion of design language.

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 
Application of high precision steel pipe produced by pipe welding machine in modern industry
Application of high precision steel pipe produced by pipe welding machine in modern industry
The high-precision steel pipe produced by pipe welding machine is widely used in modern industry, and its production process and quality control requirements are strict. The following is a summary of the relevant technical points and application scenarios:

1. The characteristics of high-precision steel pipe
High dimensional accuracy: small outer diameter, wall thickness tolerance (usually up to ±0.05mm), low ellipticity.
Excellent surface quality: smooth weld without burrs, surface finish Ra≤0.8μm.
Stable mechanical properties: weld strength close to the base material, uniform compressive/tensile properties.
Applicable materials: stainless steel (304/316L), carbon steel, alloy steel (such as API series), etc.

2. Core production process
(1) Type of pipe welding machine
High-frequency welding (HFW) : high efficiency, suitable for medium thin wall pipe (Φ10~Φ600mm), need to cooperate with precision forming unit.
Laser welding: small heat affected zone, narrow weld (0.1~0.3mm), suitable for ultra-thin walls (such as 0.3mm) or special alloys.
TIG welding: For high alloy steel or thick wall pipe, higher weld purity.
(2) Key process links
Forming process: multi-roll continuous cold forming, dynamic adjustment of roll parameters to compensate for rebound.
Welding control:
High frequency welding: precise control of current frequency (100~400kHz) and extrusion amount.
Laser welding: focus position accuracy ±0.05mm, real-time depth monitoring (such as CCD vision).
Online detection:
Eddy current inspection (ET) : Detection of surface cracks.
Ultrasonic inspection (UT) : detection of internal defects (sensitivity Φ0.5mm equivalent flat hole).
Laser caliper: Outer diameter closed loop control (accuracy ±0.01mm).

3. Post-processing technology
Heat treatment: bright annealing (hydrogen nitrogen protection atmosphere) to eliminate stress, hardness fluctuation ≤3HRC.
Straightening: multi-roll precision straightening, straightness ≤0.5mm/m.
Surface treatment:
Electrolytic polishing (EP) : For medical/food grade stainless steel tubes, Ra up to 0.2μm.
Coating: hot dip galvanizing (zinc layer ≥80μm) or electroless nickel plating (uniform thickness ±2μm).

4. Typical application areas
Automobile manufacturing: fuel injection pipe (tolerance ±0.03mm), hydraulic pipe.
Semiconductor equipment: Ultra-high clean gas delivery pipe (inner wall EP treatment, particle ≤Class 5).
Medical instruments: endoscopic catheter (Φ1~5mm, wall thickness 0.1mm).
Energy industry: Instrument tubes for nuclear power plants (SA213-TP347H material, intergranular corrosion test passed).

5. Quality control standards
International standard:
ASTM A269 (Universal Seamless and Welded Austenitic Stainless Steel Pipe)
EN 10305-4 (Precision welded pipes for hydraulic systems)
Industry certification: ISO 9001, PED 2014/68/EU (Pressure Equipment Directive).

6. Technological trends
Intelligent production: AI algorithm optimizes welding parameters, and the yield is increased to more than 99.5%.
Composite process: laser + arc composite welding, both efficiency and quality (speed increased by 30%).
Green manufacturing: low energy high frequency power supply (efficiency ≥90%), waste acid recovery ≥95%.

Through the above process optimization and strict quality control, the high-precision steel pipe produced by the pipe welding machine can meet the demanding requirements of size, performance and reliability in high-end industrial fields. In actual production, the process route needs to be customized according to the material characteristics and uses, for example, medical tubes need to undergo additional passivation treatment and biocompatibility testing.

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 
Detail
The high-precision steel pipe produced by pipe welding machine is widely used in modern industry, and its production process and quality control requirements are strict. The following is a summary of the relevant technical points and application scenarios:

1. The characteristics of high-precision steel pipe
High dimensional accuracy: small outer diameter, wall thickness tolerance (usually up to ±0.05mm), low ellipticity.
Excellent surface quality: smooth weld without burrs, surface finish Ra≤0.8μm.
Stable mechanical properties: weld strength close to the base material, uniform compressive/tensile properties.
Applicable materials: stainless steel (304/316L), carbon steel, alloy steel (such as API series), etc.

2. Core production process
(1) Type of pipe welding machine
High-frequency welding (HFW) : high efficiency, suitable for medium thin wall pipe (Φ10~Φ600mm), need to cooperate with precision forming unit.
Laser welding: small heat affected zone, narrow weld (0.1~0.3mm), suitable for ultra-thin walls (such as 0.3mm) or special alloys.
TIG welding: For high alloy steel or thick wall pipe, higher weld purity.
(2) Key process links
Forming process: multi-roll continuous cold forming, dynamic adjustment of roll parameters to compensate for rebound.
Welding control:
High frequency welding: precise control of current frequency (100~400kHz) and extrusion amount.
Laser welding: focus position accuracy ±0.05mm, real-time depth monitoring (such as CCD vision).
Online detection:
Eddy current inspection (ET) : Detection of surface cracks.
Ultrasonic inspection (UT) : detection of internal defects (sensitivity Φ0.5mm equivalent flat hole).
Laser caliper: Outer diameter closed loop control (accuracy ±0.01mm).

3. Post-processing technology
Heat treatment: bright annealing (hydrogen nitrogen protection atmosphere) to eliminate stress, hardness fluctuation ≤3HRC.
Straightening: multi-roll precision straightening, straightness ≤0.5mm/m.
Surface treatment:
Electrolytic polishing (EP) : For medical/food grade stainless steel tubes, Ra up to 0.2μm.
Coating: hot dip galvanizing (zinc layer ≥80μm) or electroless nickel plating (uniform thickness ±2μm).

4. Typical application areas
Automobile manufacturing: fuel injection pipe (tolerance ±0.03mm), hydraulic pipe.
Semiconductor equipment: Ultra-high clean gas delivery pipe (inner wall EP treatment, particle ≤Class 5).
Medical instruments: endoscopic catheter (Φ1~5mm, wall thickness 0.1mm).
Energy industry: Instrument tubes for nuclear power plants (SA213-TP347H material, intergranular corrosion test passed).

5. Quality control standards
International standard:
ASTM A269 (Universal Seamless and Welded Austenitic Stainless Steel Pipe)
EN 10305-4 (Precision welded pipes for hydraulic systems)
Industry certification: ISO 9001, PED 2014/68/EU (Pressure Equipment Directive).

6. Technological trends
Intelligent production: AI algorithm optimizes welding parameters, and the yield is increased to more than 99.5%.
Composite process: laser + arc composite welding, both efficiency and quality (speed increased by 30%).
Green manufacturing: low energy high frequency power supply (efficiency ≥90%), waste acid recovery ≥95%.

Through the above process optimization and strict quality control, the high-precision steel pipe produced by the pipe welding machine can meet the demanding requirements of size, performance and reliability in high-end industrial fields. In actual production, the process route needs to be customized according to the material characteristics and uses, for example, medical tubes need to undergo additional passivation treatment and biocompatibility testing.

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 
The relationship between pipe welding machine and automobile frame manufacturing
The relationship between pipe welding machine and automobile frame manufacturing
The relationship between pipe welding machine and automobile frame manufacturing is mainly reflected in the production process, material selection and process optimization. The following is a technical analysis of the relationship between the two:

1.The role of pipe welding machine in the manufacture of automobile frame
Pipe production: The welding pipe machine is used to manufacture high-precision welded steel pipes, which constitute the longitudinal beams, beams, anti-collision beams and other key components of the automobile frame. High frequency welding (HFW) or laser welding technology can produce steel pipes with uniform wall thickness and strength of more than 800MPa to meet the needs of lightweight.
Customized processing: Through flexible forming technology, the welding machine can produce special-shaped cross section pipes (such as rectangular, trapezoidal), adapt to the topology optimization design of different models of frames, improve space utilization and impact energy absorption efficiency.

2.The core requirements of the welding pipe process for automobile frames
Material properties: DP600/DP800 duplex steel or 22MnB5 thermoforming steel should be used, and online heat treatment (such as induction annealing) should be carried out after welding to ensure the microstructure consistency between the weld zone and the base material and avoid HAZ (heat affected zone) softening.
Dimensional accuracy: Diameter tolerance should be controlled within ±0.2mm, ellipticity ≤0.5%, to ensure the matching accuracy of the assembly and stamping parts (clearance <0.5mm).

3.Key technology breakthrough point
Laser-MAG composite welding: the penetration depth can reach 8mm, the welding speed is increased to 6m/min, the heat input is reduced by 30%, and the welding deformation of the frame is significantly reduced (≤1.5mm/m).
Online quality monitoring: high-speed CCD vision system (sampling rate 2000fps) with eddy current detection, to achieve real-time detection of weld defects, miss rate <0.01%.

4.Cost-performance balance
Compared with the stamping and welding structure, the welded pipe frame can reduce the weight by 15-20%, the material utilization rate is increased to 95%, and the manufacturing cost of the bicycle is reduced by about 1200 yuan. However, it is necessary to increase the investment in roller forming molds (about 2 million yuan/set).

5.Industry Application Cases
- An independent brand pure level station adopts 3D variable cross-section welded pipe subframe, with torsional rigidity increased to 27000Nm/°, 40% higher than the traditional structure, and the battery pack space utilization increased by 12%.

Conclusion
The penetration rate of welded pipe technology in the field of automotive frames is growing at a rate of 8% per year, and future development directions include:
Intelligent welded pipe system (digital twin model real-time control molding parameters)
Magnesium alloy /CFRP composite pipe welding process
Topological optimization driven continuous forming technology for variable thickness pipes

It is recommended to pay attention to the update of the ISO 15614 standard and the latest certification requirements for automotive welded pipe processes in ASME BPVC Section IX to ensure technical compliance.

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 
Detail
The relationship between pipe welding machine and automobile frame manufacturing is mainly reflected in the production process, material selection and process optimization. The following is a technical analysis of the relationship between the two:

1.The role of pipe welding machine in the manufacture of automobile frame
Pipe production: The welding pipe machine is used to manufacture high-precision welded steel pipes, which constitute the longitudinal beams, beams, anti-collision beams and other key components of the automobile frame. High frequency welding (HFW) or laser welding technology can produce steel pipes with uniform wall thickness and strength of more than 800MPa to meet the needs of lightweight.
Customized processing: Through flexible forming technology, the welding machine can produce special-shaped cross section pipes (such as rectangular, trapezoidal), adapt to the topology optimization design of different models of frames, improve space utilization and impact energy absorption efficiency.

2.The core requirements of the welding pipe process for automobile frames
Material properties: DP600/DP800 duplex steel or 22MnB5 thermoforming steel should be used, and online heat treatment (such as induction annealing) should be carried out after welding to ensure the microstructure consistency between the weld zone and the base material and avoid HAZ (heat affected zone) softening.
Dimensional accuracy: Diameter tolerance should be controlled within ±0.2mm, ellipticity ≤0.5%, to ensure the matching accuracy of the assembly and stamping parts (clearance <0.5mm).

3.Key technology breakthrough point
Laser-MAG composite welding: the penetration depth can reach 8mm, the welding speed is increased to 6m/min, the heat input is reduced by 30%, and the welding deformation of the frame is significantly reduced (≤1.5mm/m).
Online quality monitoring: high-speed CCD vision system (sampling rate 2000fps) with eddy current detection, to achieve real-time detection of weld defects, miss rate <0.01%.

4.Cost-performance balance
Compared with the stamping and welding structure, the welded pipe frame can reduce the weight by 15-20%, the material utilization rate is increased to 95%, and the manufacturing cost of the bicycle is reduced by about 1200 yuan. However, it is necessary to increase the investment in roller forming molds (about 2 million yuan/set).

5.Industry Application Cases
- An independent brand pure level station adopts 3D variable cross-section welded pipe subframe, with torsional rigidity increased to 27000Nm/°, 40% higher than the traditional structure, and the battery pack space utilization increased by 12%.

Conclusion
The penetration rate of welded pipe technology in the field of automotive frames is growing at a rate of 8% per year, and future development directions include:
Intelligent welded pipe system (digital twin model real-time control molding parameters)
Magnesium alloy /CFRP composite pipe welding process
Topological optimization driven continuous forming technology for variable thickness pipes

It is recommended to pay attention to the update of the ISO 15614 standard and the latest certification requirements for automotive welded pipe processes in ASME BPVC Section IX to ensure technical compliance.

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