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Explain the three welding states of high frequency welded pipe equipment
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- Release time：2022-05-02 11:30
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【概要描述】We judge whether the quality of the welded pipe meets the standard, generally through the welding process of the high frequency welded pipe equipment to deal with the welding seam. Well, we all know that there are three types of welding seams.
Explain the three welding states of high frequency welded pipe equipment
【概要描述】We judge whether the quality of the welded pipe meets the standard, generally through the welding process of the high frequency welded pipe equipment to deal with the welding seam. Well, we all know that there are three types of welding seams.
- Sort：Information
- Auth:
- Source:
- Release time：2022-05-02 11:30
- Pvs：
Detail
We judge whether the quality of the welded pipe meets the standard, generally through the welding process of the high frequency welded pipe equipment to deal with the welding seam. Well, we all know that there are three types of welding seams.
The welding form of high frequency welded pipe equipment: ① solid phase welding; ② solid fusion welding; ③ fusion welding.
Solid phase welding
It means that after the narrow area of the edge of the tube blank is heated to a high temperature of 1250~1300°C, the strong extrusion force conveyed by the extrusion roller squeezes the two edges of the tube blank together to form a common crystallization and realize welding. The feature of solid phase welding is that although the edge of the tube blank has reached the welding temperature, the heated area of the tube blank edge in the open corner area is narrow and still maintains the original shape, as shown in Figure 1. During the welding process, only a small amount of metal is extruded, forming extremely small internal and external burrs, the splashing sparks are small, and the burr height is generally not more than 30mm.
Solution welding
The performance reflected on the edge of the tube blank is that when the edge of the tube blank is heated to 1300~1400°C, the physical shape of the tube blank edge in the open corner area is no longer angular, especially near the apex of the corner, the contours of the two edges have been blurred, Even blending; at the same time, the heated area is much wider than that of the solid phase, see Figure 2, and the welding can be completed with only a large pressing force. During the welding process of the high frequency welded pipe equipment , part of the molten metal is extruded, forming large internal and external burrs, accompanied by more large sparks splashing around.
Fusion welding
The edge of the tube blank is heated to above 1400 °C, the heating range of the edge is sharply widened, part of the metal is in a molten state, and the physical shape completely loses its regularity, as shown in Figures 3 and 4; the molten metal on both sides of the front end of the opening angle has "flowed "Together, a liquid lintel is formed, where the high-frequency current is highly concentrated, causing localized vaporization of the molten metal at the lintel. In this state, the two edges of the tube blank can be welded with only a small extrusion force; at the same time, a large amount of molten metal is easily extruded, and a large number of internal and external burrs are generated, accompanied by strong sparks.
In fact, the relationship between the three welding forms can be well explained by the length of the liquid lintel in Figure 4:
When the length of the liquid lintel is displayed as L, /2~L, /3, it is solid-fusion welding; when the length of the liquid lintel is reduced to L, ≈0, it is solid-phase welding.
In the actual production process of high frequency welded pipe equipment , the three welding forms are often intertwined, but the solid-fusion welding form is more favored by operators and is the most widely used. Both solid-phase welding and fusion welding have great application risks. Under the influence of many objective factors, the actual welding temperature is difficult to be strictly constant: in the solid-phase welding state, if the temperature is a little lower, the welding will not penetrate , to form cold welding; in the molten welding state, if the temperature is a little higher, it is bound to form over-burning defects; on the other hand, solid fusion welding, the welding temperature is a little higher or lower, the above problems will not occur, and it is easy to meet the process needs. In particular, if the customer requires a straight pipe with small internal burrs, solid-phase welding should be used; if a curved pipe with small internal burr is required, solid-fusion welding should be selected; of course, if welding high-strength thick-walled pipes, then, Fusion welding is the best choice.
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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 introduction and Basic principles:
The composition of the equipment and the function description of each part.
The production principle of spiral welded pipe, including the basic process of forming, welding and shaping steel strip.
2.Safe operation rules and regulations:
Explain safe operation procedures in detail.
Emphasis on the use of personal protective equipment.
Safe operation procedures for equipment start-up, operation and shutdown.
3.Equipment Operation Training:
How to properly start and shut down the device.
Loading and centering adjustment method of steel belt.
Set and adjust welding current and voltage.
How to control production speed and quality control.
4.Common fault diagnosis and treatment:
Common fault identification and elimination methods.
Diagnosis and countermeasures of welding defects.
Routine maintenance and maintenance of equipment.
5.Quality Control:
How to ensure the stability and consistency of welding.
Methods to detect and test the quality of welded pipes, such as ultrasonic inspection, X-ray inspection, etc.
6. Hands-on Training:
Training and guidance in actual operation to ensure that trainees can operate the equipment independently.
Simulate problem handling and emergency response in a production environment.
7.Theoretical and practical evaluation:
Assess the theoretical knowledge and practical skills of the trainees to ensure that they meet the training requirements.
Training is usually conducted by experienced technicians and engineers and includes both detailed written information and field practice. After the training, there may be a corresponding certification or certificate issued as a sign that the operator is qualified.
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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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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Equipment knowledge: Understand the basic components of the slitting unit and its working principle.
Operation specifications: Familiar with the operation procedures, including starting, stopping, adjusting parameters, common problem handling, etc.
Safety training: Understand the safety risks in equipment operation and corresponding preventive measures, and be familiar with emergency handling methods in emergency situations.
2.Practical operation:
On-site operation demonstration: An experienced operator gives a demonstration on site to guide new employees to master basic operating skills.
Hands-on practice: Let new employees operate the equipment themselves, accumulate experience in actual operation, and solve the problems encountered.
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Daily inspection: Train employees to understand the contents and methods of daily inspection of equipment, including cleaning, lubrication, fastening and other work.
Troubleshooting: Teach employees how to identify common equipment failures, understand basic troubleshooting methods and when professional maintenance personnel are required to intervene.
4.Efficiency optimization:
Production Management: Explain how to rationally arrange production tasks to improve equipment utilization and production efficiency.
Data Analysis: Teach employees how to record and analyze production data to find and improve the weak links in production.
5.Assessment and continuous improvement:
Assessment: Evaluate the effectiveness of training through examinations or practical assessments to ensure that employees have the necessary knowledge and skills.
Continuous improvement: Regularly organize training review and skill upgrading courses, and constantly improve the training content according to the actual production and equipment update.
After the training, new employees can work under the supervision of an experienced operator until they are fully competent.
For more information, please pay attention to the website of Jinyujie Mechanical and Electrical Used Pipe Mill Supplier：www.usedpipemill.com
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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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Constant tension: The tension control system is used to maintain a constant tension during the operation of the looping motor to avoid strip relaxation or pulling.
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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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For more information, please pay attention to the website of Jinyujie Mechanical and Electrical Used Pipe Mill Supplier：www.usedpipemill.com
JinYuJie-Used Pipe Mills Supplier（Please click the link→) :second-hand pipe mill
1.Basic construction: A typical roller type bedroom spiral hoop usually consists of two sets of rollers that form a spiral shaped channel for guiding and supporting the metal strip.
2.Operation principle: When the metal strip passes through the looper, the strip is guided and supported in the spiral path. Due to the spiral structure of the looper, the strip can be smoothly transmitted under the condition of uneven strip speed to ensure the normal progress of the subsequent process.
3.Commissioning and maintenance: Used equipment needs to be inspected and maintained in detail before use. Includes:
Cleaning: Remove oil, dust and so on from the surface.
Lubrication: Check and add lubricating oil to ensure the normal operation of each transmission component.
Calibration: Ensure that the neutralization pressure of the roller is set correctly.
Replacement parts: Check for wear and replace necessary parts.
4.Application process: In the process of use, it is necessary to pay attention to the operation specifications, monitor the operating status of the equipment, and adjust the equipment parameters in time to meet the strip specifications and process requirements. In addition, it is also necessary to pay attention to safe operation to prevent accidents.
Through the above methods, the used roller bedroom spiral looper can continue to play its function and provide support for metal processing production.
For more information, please pay attention to the website of Jinyujie Mechanical and Electrical Used Pipe Mill Supplier：www.usedpipemill.com
JinYuJie-Used Pipe Mills Supplier（Please click the link→) :second-hand pipe mill
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Wechat: 13392281699
Email: zty@usedpipemill.com
Company address:No. A99, East Lecong Avenue, Lecong Town, Foshan City, Guangdong Province
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