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Used round tube forming machines, the main points of welding quality (1)

Used round tube forming machines, the main points of welding quality (1)

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  • Release time:2022-02-01 11:30
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【概要描述】There are many factors that affect the welding quality of used round tube forming machines, and these factors interact and restrict each other in the same system.

Used round tube forming machines, the main points of welding quality (1)

【概要描述】There are many factors that affect the welding quality of used round tube forming machines, and these factors interact and restrict each other in the same system.

  • Sort:Information
  • Auth:
  • Source:
  • Release time:2022-02-01 11:30
  • Pvs:
Detail

There are many factors that affect the welding quality of used round tube forming machines, and these factors interact and restrict each other in the same system.

 

When one factor changes, other factors will also change as it changes. Therefore, in the high frequency adjustment, it is not enough to pay attention to the local adjustment of the frequency, power, current or squeeze amount of the used round tube forming machines.

 

This adjustment must be based on the specific conditions of the entire molding system, comprehensively considered from all aspects related to high-frequency welding, and adjusted by excluding all influencing factors one by one.

 

Below we break down the main factors in the high-frequency welding process, there are the following eight aspects, we will introduce in detail ① frequency ② rendezvous angle (VEE angle)

 

Used round tube forming machines

 

① Frequency

This frequency refers to the high-frequency frequency of the second-hand round tube forming machine during the welding process. The frequency during high-frequency welding has a great influence on the welding and quality, because the high-frequency frequency affects the distribution of current in the raw material.

 

The main influence of the selected frequency on welding is the size of the heat-affected zone of the weld.

In terms of welding efficiency, a higher frequency should be used as much as possible. The high frequency current of 100KHz can penetrate 0.1mm of ferritic steel, while 400KHz can only penetrate 0.04mm, that is, the current density distribution on the surface of the steel plate, the latter is nearly 2.5 times higher than the former.

 

In production practice, the frequency of 300KHz~400Khz can generally be selected when welding ordinary carbon steel materials; while welding alloy materials or thick steel plates over 10mm, a relatively lower frequency can be used, because the chromium and zinc contained in alloy steel The skin effect of copper, aluminum and other elements is somewhat different from that of ordinary carbon steel. Metallography and metal composition are different, and the frequency required for welding is also different.

 

At present, foreign high-frequency manufacturers have adopted newer solid-state high-frequency technology. After setting a frequency range, it can automatically track and adjust the frequency according to the material thickness, unit speed and other conditions during welding.

 

The more high-end Chromatoer inverter welding machine can even gradually adjust the required optimal frequency in the frequency range, with an accuracy of adjustable to every 1KHz.

 

② Meeting angle (VEE angle)

 

Used round tube forming machines

 

The meeting angle is the angle between the two sides of the strip when it enters the extrusion point. Due to the proximity effect, when the high-frequency current passes through the edge of the steel plate, the edge of the steel plate will form a preheating section and a melting section (also called a lintel). When the lintel section is heated violently, the molten steel inside is quickly vaporized and blasted It splashes out and forms a flash. This is the so-called "fire". The size of the meeting angle (VEE angle) has the most direct effect on the melting section (welding).

 

When the meeting angle is small, the proximity effect is significant, which is beneficial to increase the welding speed. However, if the meeting angle is too small, the preheating section and the melting section become longer, and the result of the longer melting section makes the flashing process unstable. After the lintel blasts, it is easy to form deep pits and pinholes, and it is difficult to squeeze and fuse.

 

When the meeting angle is too large, the melting section becomes shorter and the flash is stable, but the proximity effect is weakened, the welding efficiency is significantly reduced, and the power consumption increases.

 

In addition, when forming thin-walled welded pipes, the meeting angle will stretch the edges of the pipe and produce wavy wrinkles.

In the production of used round tube forming machines, we generally adjust the meeting angle within 2°-6°. The speed of the unit is faster when producing thin plates, and a smaller meeting angle is required for extrusion molding; the speed of the unit is slower when producing thick plates. Use a larger meeting angle when extruding.

 

Here is an empirical formula for reference: rendezvous angle * unit speed ≮ 100

Therefore, fully understanding the frequency and the angle of rendezvous (VEE angle) will affect the welding quality of the used round tube forming machines, so it is necessary to analyze other aspects of the welding quality of the used round tube forming machines to summarize the method and deal with it. Introduce ③welding method and ④input power. If necessary, you can continue to pay attention to us.

 

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The Japanese 25 model Used pipe welding machine is redefining industry standards with its exceptional cost-performance ratio. For enterprises pursuing "lean production," this equipment not only significantly reduces initial investments but also delivers machining quality comparable to new machines. When procuring, companies should evaluate both the current condition of the equipment and its potential for upgrades to maximize investment value. During this critical period of manufacturing transformation, choosing high-value Used pipe welding machines is undoubtedly a wise decision for achieving "cost reduction and efficiency improvement."

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In-depth Interpretation of Market Status
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Japanese equipment accounts for about 35% (renowned for high precision)

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Domestic equipment accounts for 40% (advantaged by pricing)

Among these, the three core competitive strengths of the Japanese 25 model Used pipe welding machine:

Precision retention: Maintains ±0.05mm machining accuracy even after 5 years of use

Energy efficiency: 18-22% more energy-efficient than comparable new domestic machines

Residual value rate: Retains over 40% residual value after 3 years of use

Core Technology Analysis
The four core systems of this Used pipe welding machine model:

High-precision forming system (7 horizontal rolls + 5 vertical rolls configuration)

Intelligent temperature-controlled welding system (±2°C precise temperature control)

Online inspection system (equipped with CCD visual inspection)

Energy-saving transmission system (servo motor + frequency conversion control)

Industry Application Big Data
In the automotive manufacturing sector:

Average production cost reduction: 42%

Production efficiency improvement: 28%

Defect rate reduction: Below 0.5%

In the architectural decoration sector:

Surface treatment compliance rate: 99.2%

Daily production capacity: Exceeds 5,000 linear meters

Product consistency deviation: <0.03mm

Procurement Decision Guide
Five critical dimensions to consider when purchasing Used pipe welding machines:

Equipment service years (recommend choosing machines under 5 years old)

Key component conditions (focus on high-frequency welding head wear)

Technical documentation completeness (must include complete maintenance records)

Supplier qualifications (prefer authorized service providers of Japanese brands)

Local service capabilities (service network with 2-hour response time)

Typical ROI Analysis
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New machine investment: Approximately ¥2.8 million

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Annual cost savings: ¥760,000 (including energy, maintenance, etc.)

Payback period: 19 months

Future Development Trends
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Adding IoT modules for remote monitoring (increases value by 15%)

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Materials and processes

Material durability: Core components such as rolls and high-frequency welders should be original to ensure corrosion resistance and tensile strength.

Process control: Welding quality directly affects joint strength, requiring precise regulation of high-frequency current's skin effect and proximity effect.

Appearance and performance

Visual inspection: The unit surface should be free of rust and deformation, with no significant wear on molds.

Performance test: Verify production speed, sizing accuracy (e.g. ovality ±0.05mm) and flying saw synchronization through trial operation.

After-sales service

Reputable suppliers like Jinyujie Electromechanical provide installation, spare parts support and technical training to reduce operational risks.

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Cost-effectiveness

The 76-127 model typically costs only 50%-60% of new equipment while being ready for immediate use.

A Zhejiang-based enterprise reported 30% productivity improvement with significantly better ROI.

Sustainability

Refurbishing used equipment reduces resource waste, aligning with green manufacturing trends.

Industry adaptability

Widely used in construction (guardrails, scaffolding), automotive (exhaust pipes) and energy (oil pipelines) sectors, supporting various materials including carbon steel and stainless steel.

4. Maintenance and Risk Control
Routine maintenance

Regular lubrication and inspection of key components to prevent rust and damage.

Operation standards

Operators should receive proper training and wear protective equipment.

Procurement risks

Verify equipment sources and clarify responsibilities through formal agreements.

5. Industry Trends and Selection Recommendations
The domestic used pipe welding machine market grew 25% YoY in 2023, with increasing share of refurbished imported equipment. Selection suggestions:

Match production needs with equipment specifications

Choose reputable suppliers with comprehensive after-sales services

Conclusion
The 76-127 used pipe welding machine unit, with its mature technology, low cost and environmental benefits, has become an optimal choice for manufacturers seeking efficiency improvements. Enterprises should combine quality assessment, maintenance strategies and supplier services to maximize equipment value and promote sustainable development.

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With increasing emphasis on cost control and environmental protection in manufacturing, used pipe welding machines have become a popular choice for SMEs due to their cost-effectiveness and sustainability. This article takes the 76-127 model as an example, providing a comprehensive analysis from multiple dimensions including technical parameters, equipment configuration, quality assessment, market advantages and industrial applications.

1. Technical Parameters and Equipment Configuration
The 76-127 used pipe welding machine unit is renowned for its high efficiency and flexibility, with core parameters as follows:

Processing range: Capable of producing square pipes (Φ40-100) and round pipes (Φ50-127) with wall thickness up to 5mm, at a production speed of 60m/min.

Key configurations:

Forming and welding: Includes 7 horizontal rolls and 9 vertical rolls forming unit, paired with 300kW solid-state high-frequency welder to ensure stable weld quality.

Auxiliary systems: Hydraulic uncoiler, shear welder, computer flying saw and Turk's head straightening device to enhance automation.

Process flow: Strip uncoiling→leveling→forming→high-frequency welding→cooling→sizing→cutting, ensuring continuous high-efficiency production.

The modular design simplifies maintenance, and after refurbishment, its performance approaches that of new machines while reducing procurement costs by 40%-60%, making it ideal for budget-conscious enterprises.

2. Key Points for Quality Assessment
According to industry standards, the quality of used pipe welding machines should be comprehensively evaluated from four aspects:

Materials and processes

Material durability: Core components such as rolls and high-frequency welders should be original to ensure corrosion resistance and tensile strength.

Process control: Welding quality directly affects joint strength, requiring precise regulation of high-frequency current's skin effect and proximity effect.

Appearance and performance

Visual inspection: The unit surface should be free of rust and deformation, with no significant wear on molds.

Performance test: Verify production speed, sizing accuracy (e.g. ovality ±0.05mm) and flying saw synchronization through trial operation.

After-sales service

Reputable suppliers like Jinyujie Electromechanical provide installation, spare parts support and technical training to reduce operational risks.

3. Market Advantages and Environmental Value
Cost-effectiveness

The 76-127 model typically costs only 50%-60% of new equipment while being ready for immediate use.

A Zhejiang-based enterprise reported 30% productivity improvement with significantly better ROI.

Sustainability

Refurbishing used equipment reduces resource waste, aligning with green manufacturing trends.

Industry adaptability

Widely used in construction (guardrails, scaffolding), automotive (exhaust pipes) and energy (oil pipelines) sectors, supporting various materials including carbon steel and stainless steel.

4. Maintenance and Risk Control
Routine maintenance

Regular lubrication and inspection of key components to prevent rust and damage.

Operation standards

Operators should receive proper training and wear protective equipment.

Procurement risks

Verify equipment sources and clarify responsibilities through formal agreements.

5. Industry Trends and Selection Recommendations
The domestic used pipe welding machine market grew 25% YoY in 2023, with increasing share of refurbished imported equipment. Selection suggestions:

Match production needs with equipment specifications

Choose reputable suppliers with comprehensive after-sales services

Conclusion
The 76-127 used pipe welding machine unit, with its mature technology, low cost and environmental benefits, has become an optimal choice for manufacturers seeking efficiency improvements. Enterprises should combine quality assessment, maintenance strategies and supplier services to maximize equipment value and promote sustainable development.

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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Recently, Furuiwo launched its highly anticipated used pipe welding machine—the 140 model pipe welding unit. With outstanding processing capabilities and significant cost-performance advantages, this equipment has become an ideal choice for small and medium-sized pipe processing enterprises.

Core Performance: Precision and Efficiency for Diverse Needs
The Furuiwo 140 used pipe welding machine emphasizes practicality and stability, with key technical parameters as follows:

Processing Diameter Range: Φ60-159 mm, covering production needs from light-duty pipes to medium industrial pipelines;

Processing Thickness: Supports materials up to 5 mm, suitable for construction and machinery manufacturing;

Processing Speed: 60 meters/minute, significantly improving efficiency while reducing energy consumption.

The unit adopts a modular design for easy maintenance. After comprehensive inspection and upgrades by Furuiwo’s technical team, its performance is close to new machines, yet procurement costs are substantially lower.

Market Advantages: Economic and Environmental Value
Amid intensifying competition in manufacturing, used pipe welding machines are becoming a strategic choice for cost optimization. The Furuiwo 140 model stands out with the following advantages:

Cost Savings: Priced 40%-60% lower than new machines, ideal for budget-conscious SMEs;

Rapid Deployment: Pre-tested and ready for immediate use, shortening production setup time;

Sustainability: Extends equipment lifecycle, aligning with green manufacturing trends.

Wang Qiang, Furuiwo’s Sales Director, stated: “We are committed to providing high-value solutions. This used pipe welding machine not only ensures reliability but also comes with full after-sales support, including a one-year warranty and lifelong technical assistance.”

Applications: Versatility Across Industries
The unit processes carbon steel, stainless steel, and other materials, serving industries such as:

Construction: Production of guardrails and scaffold pipes;

Automotive: Exhaust pipes and chassis components;

Energy: Customized oil and water pipelines.

A Zhejiang-based pipe manufacturer reported: “After purchasing Furuiwo’s used pipe welding machine, our productivity increased by 30%, with costs halved compared to new equipment—ROI far exceeded expectations.”

Industry Outlook: Growing Demand for Used Equipment
As manufacturing upgrades, the used industrial equipment market is booming. Industry reports indicate a 25% year-on-year growth in China’s used pipe welding machine transactions in 2023, with refurbished imported brands gaining traction. Furuiwo, leveraging technical expertise and channel advantages, has emerged as a leader in this sector.

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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Furuiwo Used 140 Pipe Welding Machine Unit: Cost-Effective Solution for Efficient Production

Recently, Furuiwo launched its highly anticipated used pipe welding machine—the 140 model pipe welding unit. With outstanding processing capabilities and significant cost-performance advantages, this equipment has become an ideal choice for small and medium-sized pipe processing enterprises.

Core Performance: Precision and Efficiency for Diverse Needs
The Furuiwo 140 used pipe welding machine emphasizes practicality and stability, with key technical parameters as follows:

Processing Diameter Range: Φ60-159 mm, covering production needs from light-duty pipes to medium industrial pipelines;

Processing Thickness: Supports materials up to 5 mm, suitable for construction and machinery manufacturing;

Processing Speed: 60 meters/minute, significantly improving efficiency while reducing energy consumption.

The unit adopts a modular design for easy maintenance. After comprehensive inspection and upgrades by Furuiwo’s technical team, its performance is close to new machines, yet procurement costs are substantially lower.

Market Advantages: Economic and Environmental Value
Amid intensifying competition in manufacturing, used pipe welding machines are becoming a strategic choice for cost optimization. The Furuiwo 140 model stands out with the following advantages:

Cost Savings: Priced 40%-60% lower than new machines, ideal for budget-conscious SMEs;

Rapid Deployment: Pre-tested and ready for immediate use, shortening production setup time;

Sustainability: Extends equipment lifecycle, aligning with green manufacturing trends.

Wang Qiang, Furuiwo’s Sales Director, stated: “We are committed to providing high-value solutions. This used pipe welding machine not only ensures reliability but also comes with full after-sales support, including a one-year warranty and lifelong technical assistance.”

Applications: Versatility Across Industries
The unit processes carbon steel, stainless steel, and other materials, serving industries such as:

Construction: Production of guardrails and scaffold pipes;

Automotive: Exhaust pipes and chassis components;

Energy: Customized oil and water pipelines.

A Zhejiang-based pipe manufacturer reported: “After purchasing Furuiwo’s used pipe welding machine, our productivity increased by 30%, with costs halved compared to new equipment—ROI far exceeded expectations.”

Industry Outlook: Growing Demand for Used Equipment
As manufacturing upgrades, the used industrial equipment market is booming. Industry reports indicate a 25% year-on-year growth in China’s used pipe welding machine transactions in 2023, with refurbished imported brands gaining traction. Furuiwo, leveraging technical expertise and channel advantages, has emerged as a leader in this sector.

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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Answer: Three core advantages:
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The cost efficiency of the second-hand high-frequency welded pipe machine is only 45% of that of the new welded pipe machine. The production line of the used welded pipe mills production line sold by our company includes a one-year extended warranty, free training, and lifelong technical support.
Q: After purchasing second-hand welded pipe equipment, how long can it be put into production?
Answer: Jin Yujie Company's second-hand welded pipe equipment is all sourced from first-hand sources, with stock in the warehouse. It takes 7 days to ship and 15 days to complete installation and commissioning. The second-hand welded pipe unit can be purchased and used immediately.
It is recommended to arrange a technical team and decision-makers to conduct on-site inspections of the warehouse as soon as possible, select a second-hand welded pipe unit on site, in order to put it into production as soon as possible, create production capacity for the second-hand welded pipe production line, and achieve profitability.

more datail about this 140 enlarged 165 used tube mill line, please check here:

https://www.usedpipemill.com/product/Forever-Used-High-Frequency-Welding-Pipe-Making-Machie-of-%CE%A6140-Expand-to-%CE%A6165MM-221.html



For more information, please pay attention to the website of Jinyujie Mechanical and Electrical Used Pipe Mill Supplier:www.usedpipemill.com

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Q: Why did you choose this refurbished 140 to 165 second-hand welded pipe equipment/used tube mill?
Answer: Three core advantages:
The processing capacity of this used pipe making machine includes round pipes with  diameter of 60-159mm, square and rectangular pipes with  diameter of 50 * 50-120 * 120mm, anda wall thickness of 2.0-5.0mm, fully covering the mainstream demand of the welded pipe equipment market.
Refurbishment guarantee for Used ERW tube mill machinery: All mechanical and electrical components undergo professional maintenance/replacement, and the life assessment of key components meets the standards. The renovation and maintenance process for second-hand welded pipe equipment takes at least one month and up to three months.
The cost efficiency of the second-hand high-frequency welded pipe machine is only 45% of that of the new welded pipe machine. The production line of the used welded pipe mills production line sold by our company includes a one-year extended warranty, free training, and lifelong technical support.
Q: After purchasing second-hand welded pipe equipment, how long can it be put into production?
Answer: Jin Yujie Company's second-hand welded pipe equipment is all sourced from first-hand sources, with stock in the warehouse. It takes 7 days to ship and 15 days to complete installation and commissioning. The second-hand welded pipe unit can be purchased and used immediately.
It is recommended to arrange a technical team and decision-makers to conduct on-site inspections of the warehouse as soon as possible, select a second-hand welded pipe unit on site, in order to put it into production as soon as possible, create production capacity for the second-hand welded pipe production line, and achieve profitability.

more datail about this 140 enlarged 165 used tube mill line, please check here:

https://www.usedpipemill.com/product/Forever-Used-High-Frequency-Welding-Pipe-Making-Machie-of-%CE%A6140-Expand-to-%CE%A6165MM-221.html



For more information, please pay attention to the website of Jinyujie Mechanical and Electrical Used Pipe Mill Supplier:www.usedpipemill.com

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Tel: +86-13392281699
Wechat: 13392281699
Email: zty@usedpipemill.com
Company address:No. A99, East Lecong Avenue, Lecong Town, Foshan City, Guangdong Province

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