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Used HFW tube mills, the characteristics and advantages and disadvantages of the two welding methods
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【概要描述】In the production process of used HFW tube mills, there are two welding methods: contact welding and induction welding.
Used HFW tube mills, the characteristics and advantages and disadvantages of the two welding methods
【概要描述】In the production process of used HFW tube mills, there are two welding methods: contact welding and induction welding.
- Sort：Information
- Auth:
- Source:
- Release time：2021-12-14 11:30
- Pvs：
Detail
In the production process of used HFW tube mills, there are two welding methods: contact welding and induction welding.
1. Contact welding
Contact welding is a kind of copper electrode contacting the two sides of the steel pipe to be welded, and the induced current penetration is good. The two effects of high-frequency current (proximity effect and skin effect) are maximized by the direct contact between the copper electrode and the steel plate. Utilization, so the welding efficiency of contact welding is higher and the power consumption is lower. It is widely used in the production of high-speed and low-precision pipes, and contact welding is generally required when producing extremely thick steel pipes with used HFW tube mills.
Compared with induction welding, contact welding has two disadvantages:
①The copper electrode is in direct contact with the steel plate and wears quickly
② Due to the influence of the flatness of the steel plate surface and the straightness of the edges, the current stability of contact welding is poor, and the internal and external burrs of the weld are relatively high. Contact welding is generally not used when welding high-precision and thin-walled pipes.
2. Induction welding
In induction welding, an induction coil with one or more turns is sheathed outside the welded steel pipe. The effect of multi-turn is better than single-turn, but it is more difficult to manufacture and install multi-turn induction coils. If the distance between the induction coil and the surface of the steel pipe is small, the efficiency is higher, but it is easy to cause discharge between the induction coil and the pipe. Generally, it is advisable to keep the induction coil from the surface of the steel pipe with a gap of 5-8mm. When using induction welding, because the induction coil is not in contact with the steel plate, there is no wear and the induced current is relatively stable, thus ensuring the stability during welding. The welded steel pipe has good surface quality and the weld seam is flat. For high-precision pipes, induction welding is basically used.
Realizing that there are two welding methods in the production process of used HFW tube mills: contact welding and induction welding, as well as their pros and cons. The corresponding welding method should be carried out according to the type of steel pipe actually produced.
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Time of issue : 2025-01-13
1.Model: This is the specific model name or number of the device.
2.Maximum drawing force: The maximum drawing capacity of the hydraulic cold drawing machine, usually expressed in tons (T).
3.Table size: The length and width of the table, usually expressed in millimeters (mm) or inches (in).
4.Drawing speed: The working speed of the hydraulic cylinder in the drawing process, usually expressed in millimeters/second (mm/s) or meters/minutes (m/min).
5.Cylinder stroke: The maximum stroke length of the hydraulic cylinder, usually expressed in millimeters (mm).
6.Hydraulic system pressure: The highest working pressure of the hydraulic system, usually expressed in MPa or Bar.
7.Power: The motor power that drives the hydraulic pump, usually expressed in kilowatts (kW).
8.Weight of the whole machine: the total weight of the hydraulic cold drawing machine, usually expressed in tons (T) or kilograms (kg).
9.Overall size: The total overall size of the hydraulic cold drawing machine (length × width × height), usually expressed in millimeters (mm).
10.Control system: Type and model of numerical control system or manual control system.
11.Year of manufacture: The year of the cold drawing mechanism, which helps to understand the service life and wear degree of the machine.
12.Maintenance records: Maintenance and maintenance records of the equipment, which can reflect the status and reliability of the equipment.
When buying a used hydraulic cold draw machine, it is recommended to carefully check the technical parameters, use status and maintenance records of the equipment to ensure that its performance meets your needs, while also taking into account the wear and tear of the equipment and maintenance history.
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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1.Model: This is the specific model name or number of the device.
2.Maximum drawing force: The maximum drawing capacity of the hydraulic cold drawing machine, usually expressed in tons (T).
3.Table size: The length and width of the table, usually expressed in millimeters (mm) or inches (in).
4.Drawing speed: The working speed of the hydraulic cylinder in the drawing process, usually expressed in millimeters/second (mm/s) or meters/minutes (m/min).
5.Cylinder stroke: The maximum stroke length of the hydraulic cylinder, usually expressed in millimeters (mm).
6.Hydraulic system pressure: The highest working pressure of the hydraulic system, usually expressed in MPa or Bar.
7.Power: The motor power that drives the hydraulic pump, usually expressed in kilowatts (kW).
8.Weight of the whole machine: the total weight of the hydraulic cold drawing machine, usually expressed in tons (T) or kilograms (kg).
9.Overall size: The total overall size of the hydraulic cold drawing machine (length × width × height), usually expressed in millimeters (mm).
10.Control system: Type and model of numerical control system or manual control system.
11.Year of manufacture: The year of the cold drawing mechanism, which helps to understand the service life and wear degree of the machine.
12.Maintenance records: Maintenance and maintenance records of the equipment, which can reflect the status and reliability of the equipment.
When buying a used hydraulic cold draw machine, it is recommended to carefully check the technical parameters, use status and maintenance records of the equipment to ensure that its performance meets your needs, while also taking into account the wear and tear of the equipment and maintenance history.
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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Time of issue : 2025-01-11
1.Model: The specific model will vary depending on the brand.
2.Scraping width: Maximum scraping width, usually between 600-3000mm.
3.Scraping length: Maximum scraping length, usually between 2000-8000mm.
4.Table size: according to the specifications of the machine.
5.Spindle speed: usually between hundreds to thousands of RPM, the specific value depends on the machine tool model.
6.Motor power: usually ranging from a few kilowatts to tens of kilowatts.
7.Number of tool holders: The number of tool holders of different models may be different.
8.Control system: Old machine tools may be equipped with traditional manual control systems, and may also be upgraded to numerical control systems.
9.Machine weight: several tons to dozens of tons.
10.Accuracy: Most scraping and rolling machine tools have high processing accuracy.
When buying used equipment, it is very important to understand the parameters of the specific model and the use of the equipment in detail. It is best to contact the seller, ask for detailed technical specifications and use records of the equipment, and carry out on-site inspection and testing.
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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1.Model: The specific model will vary depending on the brand.
2.Scraping width: Maximum scraping width, usually between 600-3000mm.
3.Scraping length: Maximum scraping length, usually between 2000-8000mm.
4.Table size: according to the specifications of the machine.
5.Spindle speed: usually between hundreds to thousands of RPM, the specific value depends on the machine tool model.
6.Motor power: usually ranging from a few kilowatts to tens of kilowatts.
7.Number of tool holders: The number of tool holders of different models may be different.
8.Control system: Old machine tools may be equipped with traditional manual control systems, and may also be upgraded to numerical control systems.
9.Machine weight: several tons to dozens of tons.
10.Accuracy: Most scraping and rolling machine tools have high processing accuracy.
When buying used equipment, it is very important to understand the parameters of the specific model and the use of the equipment in detail. It is best to contact the seller, ask for detailed technical specifications and use records of the equipment, and carry out on-site inspection and testing.
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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Time of issue : 2025-01-10
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Pipe diameter range: Pipe diameter suitable for processing.
Wall thickness range: Wall thickness range of the pipe.
Processing speed: annealing furnace processing speed of stainless steel pipe.
2.Temperature control:
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Heating method: electric heating, gas heating or other heating method.
Temperature uniformity: Ensure uniform temperature distribution in all areas of the furnace.
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Air cooling: Use air for rapid cooling.
Water cooling: Use water to improve cooling efficiency.
4.Atmosphere control:
Type of protective gas: Commonly used hydrogen, nitrogen or ammonia decomposition gas.
Gas flow and pressure: Protect gas flow and pressure control.
5.Electrical parameters:
Voltage: Voltage range required for operation.
Power: Total power of the device.
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Furnace size: The specific size of the furnace determines the length and diameter of the pipe that can be processed.
Transportation mode: The transmission mode of the pipe in the furnace, such as chain transmission, roller table transmission, etc.
Control mode: manual control, CNC or PLC control system.
In order to ensure that the right used equipment is selected, it is recommended to actually look at the condition of the equipment, understand the age of the equipment and maintenance records, and it is best to consult a professional evaluation.
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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1.Specifications:
Pipe diameter range: Pipe diameter suitable for processing.
Wall thickness range: Wall thickness range of the pipe.
Processing speed: annealing furnace processing speed of stainless steel pipe.
2.Temperature control:
Maximum temperature: The maximum operating temperature is usually 1000°C to 1200°C.
Heating method: electric heating, gas heating or other heating method.
Temperature uniformity: Ensure uniform temperature distribution in all areas of the furnace.
3.Cooling method:
Air cooling: Use air for rapid cooling.
Water cooling: Use water to improve cooling efficiency.
4.Atmosphere control:
Type of protective gas: Commonly used hydrogen, nitrogen or ammonia decomposition gas.
Gas flow and pressure: Protect gas flow and pressure control.
5.Electrical parameters:
Voltage: Voltage range required for operation.
Power: Total power of the device.
6.Other parameters:
Furnace size: The specific size of the furnace determines the length and diameter of the pipe that can be processed.
Transportation mode: The transmission mode of the pipe in the furnace, such as chain transmission, roller table transmission, etc.
Control mode: manual control, CNC or PLC control system.
In order to ensure that the right used equipment is selected, it is recommended to actually look at the condition of the equipment, understand the age of the equipment and maintenance records, and it is best to consult a professional evaluation.
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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1.Equipment status: Check the overall condition of the equipment in detail, including whether there is wear, damage, rust and other conditions. Ask the seller about the age and maintenance history of the equipment.
2.Manufacturers and brands: Choose equipment from well-known brands or trusted manufacturers, which can ensure the quality and performance of the equipment. Look online for word-of-mouth and user reviews of the brand.
3.Model and parameters: Confirm whether the specific model and technical parameters of the required unit meet your production needs, such as the type, thickness and width of processing materials, and the molding speed of the equipment.
4.Functional test: try to carry out field tests before purchase to check the operation of the equipment to ensure the normal operation of all functions, including the degree of automation, roll change function, production efficiency, etc.
5.After-sales service: Understand the seller's after-sales service, whether to provide installation and commissioning, technical guidance and maintenance services. This can ensure that the problems during the operation of the equipment can be solved in time.
6.Reasonable price: Compare the price of similar equipment on the market to ensure that the purchase of equipment is reasonable. If the price is significantly lower than the market price, it is necessary to carefully judge the actual condition of the equipment.
7.Contracts and procedures: Ensure that the purchase procedures of equipment are complete, sign a formal purchase and sales contract, clarify the rights and obligations of both parties, and ensure that the equipment transfer procedures are legal and compliant.
Before making a final decision, consult and compare in many aspects to ensure that the second-hand automatic non-changing roll cold bending unit purchased can bring benefits to your 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.Equipment status: Check the overall condition of the equipment in detail, including whether there is wear, damage, rust and other conditions. Ask the seller about the age and maintenance history of the equipment.
2.Manufacturers and brands: Choose equipment from well-known brands or trusted manufacturers, which can ensure the quality and performance of the equipment. Look online for word-of-mouth and user reviews of the brand.
3.Model and parameters: Confirm whether the specific model and technical parameters of the required unit meet your production needs, such as the type, thickness and width of processing materials, and the molding speed of the equipment.
4.Functional test: try to carry out field tests before purchase to check the operation of the equipment to ensure the normal operation of all functions, including the degree of automation, roll change function, production efficiency, etc.
5.After-sales service: Understand the seller's after-sales service, whether to provide installation and commissioning, technical guidance and maintenance services. This can ensure that the problems during the operation of the equipment can be solved in time.
6.Reasonable price: Compare the price of similar equipment on the market to ensure that the purchase of equipment is reasonable. If the price is significantly lower than the market price, it is necessary to carefully judge the actual condition of the equipment.
7.Contracts and procedures: Ensure that the purchase procedures of equipment are complete, sign a formal purchase and sales contract, clarify the rights and obligations of both parties, and ensure that the equipment transfer procedures are legal and compliant.
Before making a final decision, consult and compare in many aspects to ensure that the second-hand automatic non-changing roll cold bending unit purchased can bring benefits to your 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
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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
Wechat: 13392281699
Email: zty@usedpipemill.com
Company address:No. A99, East Lecong Avenue, Lecong Town, Foshan City, Guangdong Province
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