MENU

/
/
Significance of proximity effect to the production of high frequency welded pipe machine

Significance of proximity effect to the production of high frequency welded pipe machine

  • Sort:Information
  • Auth:
  • Source:
  • Release time:2022-07-06 11:30
  • Pvs:

【概要描述】In addition to the skin effect, the proximity effect is another characteristic of the current during the operation of the high frequency welded pipe machine. When two adjacent conductors pass alternating current of equal magnitude and opposite direction, the current will flow on the inner surface layer adjacent to the two conductors. The outer surface layer of the conductor flows through. The proximity effect of the current makes the current in the conductor further uneven, and it is this unevenness that makes high-frequency welding.

Significance of proximity effect to the production of high frequency welded pipe machine

【概要描述】In addition to the skin effect, the proximity effect is another characteristic of the current during the operation of the high frequency welded pipe machine. When two adjacent conductors pass alternating current of equal magnitude and opposite direction, the current will flow on the inner surface layer adjacent to the two conductors. The outer surface layer of the conductor flows through. The proximity effect of the current makes the current in the conductor further uneven, and it is this unevenness that makes high-frequency welding.

  • Sort:Information
  • Auth:
  • Source:
  • Release time:2022-07-06 11:30
  • Pvs:
Detail

In addition to the skin effect, the proximity effect is another characteristic of the current during the operation of the high frequency welded pipe machine. When two adjacent conductors pass alternating current of equal magnitude and opposite direction, the current will flow on the inner surface layer adjacent to the two conductors. The outer surface layer of the conductor flows through. The proximity effect of the current makes the current in the conductor further uneven, and it is this unevenness that makes high-frequency welding.

 

High frequency welded pipe machine

 

First, the strength of the proximity effect is related to the following three factors:

(1) Distance. The closer the two conductors are adjacent to each other, the stronger the proximity effect, especially when the distance between the two conductors is very close or even tends to 0, the current in the conductors will almost all converge on the adjacent layers, so that the current on the adjacent planes Sharp increase and thus cause heating of adjacent surfaces. (for example, converging to the position of the extrusion point) This property is of great significance for formulating the welding process of high frequency welded pipes. The closer to the apex of the opening V angle, the closer the distance between the two edges of the strip, the stronger the proximity effect, and the higher the temperature of the strip edge, until it reaches the melting point of the metal, and then the extrusion force of the extrusion roller acts. Weld down. Therefore, the proximity effect requires that the pipe manufacturing process of high frequency pipe machine must pay attention to the size of the V-shaped mouth, that is, the opening angle, which is related to the level of welding heat, the speed of welding and the quality of welding.

 

(2) Ratio. The strength of the proximity effect is closely related to the ratio of half of the conductor size and thickness to the current penetration depth. The larger the ratio, the stronger the proximity effect; conversely, the smaller the ratio, the weaker the proximity effect. See formula: ratio = conductor thickness / 2 penetration depth

 

(3) Frequency. The higher the current frequency, the stronger the proximity effect based on the skin effect.

 

High frequency welded pipe machine

 

Significance of Proximity Effect on High Frequency Straight Seam Welded Pipe Production

 

The significance of the proximity effect is that the characteristics of the high-frequency current flow path, location and range can be controlled by using the proximity effect. Guide the production of welded pipes and formulate welding procedures. It is necessary to select the corresponding frequency and opening angle for different specifications of welded pipes, such as the production of large-diameter thick-walled pipes, after comprehensively considering the influence of the skin effect, it is necessary to appropriately reduce the current frequency; by reducing the opening angle to shorten the length of the two edges of the pipe blank to be welded. The proximity distance and current flow path can shorten the heating time and improve the welding efficiency. On the other hand, since the high-frequency current of the induction coil and the induced current on the tube blank to be welded are both high-frequency currents, there is also a proximity effect between them. If they are placed symmetrically, the current on the tube blank to be welded is evenly distributed; placed, the current on the tube blank to be welded will present an uneven distribution. Therefore, in terms of details, the gap between the induction coil of the high frequency pipe machine and the tube blank to be welded should be installed in a small up and down manner, so that more current can be collected at the edge of the tube blank to be welded. At the same time, in order to strengthen the proximity effect, the gap between the inner diameter of the induction coil and the outer diameter of the tube blank to be welded should be minimized within the range allowed by the process.

关键词:

More News

Factors and various influences to ensure the quality of used high frequency welded pipe machine welded pipe products(1)
Factors and various influences to ensure the quality of used high frequency welded pipe machine welded pipe products(1)
In the process of producing welded pipes with used high frequency welded pipe machine, how to ensure that the product quality meets the requirements of technical standards and the needs of customers, it is necessary to analyze the factors affecting product quality in the production process of steel pipes.
Detail
In the process of producing welded pipes with used high frequency welded pipe machine, how to ensure that the product quality meets the requirements of technical standards and the needs of customers, it is necessary to analyze the factors affecting product quality in the production process of steel pipes.
Improving lubricating effect of flying saw on used welded pipe equipment
Improving lubricating effect of flying saw on used welded pipe equipment
Through the technical improvement of the used welded pipe equipment, the lubrication of the gear and rack of the flying saw has been effectively improved, and the specific performance is as follows:
Detail
Through the technical improvement of the used welded pipe equipment, the lubrication of the gear and rack of the flying saw has been effectively improved, and the specific performance is as follows:
Why does the used roll forming machine flying saw saw lack of lubrication?
Why does the used roll forming machine flying saw saw lack of lubrication?
When the used roll forming machine produces steel pipes, the pipe fittings move at a constant speed according to the set speed, and the saw car is stationary relative to the unit before the sawing process. When the steel pipe reaches the set length, the clamping device of the saw car clamps the steel pipe, and the drive mechanism drives the saw car to move with the steel pipe and perform the sawing process until the sawing operation is completed. When the sawing process of the flying saw is completed, the driving device drives the saw carriage to return to the initial position. The reciprocating motion of the saw car is realized by the relative movement of the rack at the bottom of the saw car and the gear fixedly installed on the machine bed system.
Detail
When the used roll forming machine produces steel pipes, the pipe fittings move at a constant speed according to the set speed, and the saw car is stationary relative to the unit before the sawing process. When the steel pipe reaches the set length, the clamping device of the saw car clamps the steel pipe, and the drive mechanism drives the saw car to move with the steel pipe and perform the sawing process until the sawing operation is completed. When the sawing process of the flying saw is completed, the driving device drives the saw carriage to return to the initial position. The reciprocating motion of the saw car is realized by the relative movement of the rack at the bottom of the saw car and the gear fixedly installed on the machine bed system.
Weld quality failure caused by used welded pipe machines (9)
Weld quality failure caused by used welded pipe machines (9)
When manufacturing welded pipes for used welded pipe machines, judging that the quality of the welded pipes meets the standard depends on the quality of the welds. Therefore, the quality of the weld is very important, so sometimes it is necessary to rule out the quality of the weld. We perform analyses to understand weld quality failures.
Detail
When manufacturing welded pipes for used welded pipe machines, judging that the quality of the welded pipes meets the standard depends on the quality of the welds. Therefore, the quality of the weld is very important, so sometimes it is necessary to rule out the quality of the weld. We perform analyses to understand weld quality failures.
Contact information
Tel: +86-13392281699
Wechat: 13392281699
Email: zty@usedpipemill.com
Company address:No. A99, East Lecong Avenue, Lecong Town, Foshan City, Guangdong Province

Recommendation

Online Inquiry

留言应用名称:
底部留言
描述:

LINK

Contact Us

Tel (wechat): 13336487288
Wechat:+86 13336487288

WhatsApp:+86 13336487288
Email: zty@usedpipemill.com

Address: No. A99, Lecong Avenue East, Lecong Town, Foshan City, Guangdong Province

QRCODE

Copyright 0 2021 jinyujie. 粤ICP备13051810号 Powerby:  300.cn