MENU

/
/
Used square pipe machines, adjust the welding seam position of making square rectangular pipe (2)

Used square pipe machines, adjust the welding seam position of making square rectangular pipe (2)

  • Sort:Information
  • Auth:
  • Source:
  • Release time:2021-12-11 11:30
  • Pvs:

【概要描述】Judging that the quality of the square tube produced by the used square tube machines meets the standard is based on a large number of inspection data of the microhardness of the weld and the microhardness of the base material. The former is much higher than the latter. It is for this reason that the weld is usually not placed at a positive angle, but placed within t~(t+5mm) from the corner edge to reduce the risk of weld cracks. This requires effective control of the weld position. Control methods include forming roll method, guide roll method and sizing roll method.

Used square pipe machines, adjust the welding seam position of making square rectangular pipe (2)

【概要描述】Judging that the quality of the square tube produced by the used square tube machines meets the standard is based on a large number of inspection data of the microhardness of the weld and the microhardness of the base material. The former is much higher than the latter. It is for this reason that the weld is usually not placed at a positive angle, but placed within t~(t+5mm) from the corner edge to reduce the risk of weld cracks. This requires effective control of the weld position. Control methods include forming roll method, guide roll method and sizing roll method.

  • Sort:Information
  • Auth:
  • Source:
  • Release time:2021-12-11 11:30
  • Pvs:
Detail

Judging that the quality of the square tube produced by the used square tube machines meets the standard is based on a large number of inspection data of the microhardness of the weld and the microhardness of the base material. The former is much higher than the latter. It is for this reason that the weld is usually not placed at a positive angle, but placed within t~(t+5mm) from the corner edge to reduce the risk of weld cracks. This requires effective control of the weld position. Control methods include forming roll method, guide roll method and sizing roll method.

 

The following is the introduction of the sizing roll method for the control method of the welding position of the square tube made by the used square tube machines.

 

Used square pipe machines

 

Sizing roll method

Generally, in the design of the square rectangular tube pass roll type, the pass of the first flat roll (or vertical roll) of the sizing is usually designed as a round pass. The sizing roll method is to artificially use the flat roll (or vertical roll) Roll) The hole pattern is adjusted to deliberately misaligned, and the misaligned hole pattern is used to apply a pair of opposite force couples to the welded pipe to promote the directional "rotation" of the tube body of the sizing section to achieve the purpose of controlling the position of the weld.

For example: the upper roll hole pattern is artificially misaligned to the left, the left side of the hole pattern is "empty", only the right side is in contact with the upper right part of the welded pipe, and the welded pipe rotates clockwise under the action of the force on the right side of the hole;

At the same time, the right side of the lower roll pass is "empty", and only the left side is in contact with the lower left side of the welded pipe. The welded pipe also rotates clockwise under the force of the left side of the pass. In this way, under this artificially misaligned two-roller coupling, the welded pipe is twisted clockwise, and then the weld is deflected to the right. Conversely, if the welded pipe is twisted counterclockwise, the weld will be twisted to the left.

 

According to the principle of mechanics, the sensitivity of controlling the torsion position of the weld, that is, the couple moment, depends on the diameter of the welded pipe and the ± couple (that is, the force and the degree of misalignment of the hole-shaped butt welded pipe). The degree of misalignment is less, and the couple moment is smaller. Less; the greater the degree of misalignment, the greater the torsion of the weld.

 

Used square pipe machines

 

The advantage of the sizing roll displacement method to control the position of the weld is: because the deflection of the weld mainly occurs in the sizing section, it has little effect on the welding state of the weld and the removal of internal and external burrs, but it is sensitive to small diameter and thin-walled pipes. Slightly worse (smaller moment of torque), otherwise the pipe surface will be crushed.

 

Through the control method of sizing roller method, the welding seam position of the square tube made by the used square tube machines is adjusted. However, it must be judged and adjusted according to the actual situation.

 

What needs special explanation is:

The roll offset is generally only a few tenths of a millimeter to 1~2mm (the smaller the tube is, the smaller the value is), and usually will not crush the tube surface; if the tube surface is indented due to it, this method should be abandoned.

 

The above-mentioned methods for controlling the position of the weld seam can be used alone or in combination, not only for special-shaped pipes, but also for round pipes.

 

Part of the content of this site comes from the Internet. This site only provides information storage. The copyright belongs to the original author. It does not bear the relevant legal responsibility and does not represent the views and positions of this site. Please contact and delete it if there is any infringement.
 

关键词:

More News

Welded pipe straightening method of used welded pipe machines
Welded pipe straightening method of used welded pipe machines
The problem of straightening the welded pipe often occurs when the used welded pipe machines is used to make pipes. For the straightening of welded pipes, we will explain to you how to make the pipes straightened by used welded pipe machines. Pay attention to the following requirements.
Detail
The problem of straightening the welded pipe often occurs when the used welded pipe machines is used to make pipes. For the straightening of welded pipes, we will explain to you how to make the pipes straightened by used welded pipe machines. Pay attention to the following requirements.
Common faults of used welded pipe units
Common faults of used welded pipe units
There are relatively many failures of used welded pipe machines, and the causes of failures are also more complicated. Often, one result is caused by multiple reasons, or one cause can cause several results. Some failures are tricky to deal with. Let's start with a brief description of the scratch accident.
Detail
There are relatively many failures of used welded pipe machines, and the causes of failures are also more complicated. Often, one result is caused by multiple reasons, or one cause can cause several results. Some failures are tricky to deal with. Let's start with a brief description of the scratch accident.
Common faults of used welded pipe mills production line forming machines (5)
Common faults of used welded pipe mills production line forming machines (5)
Common faults of used welded pipe mills production line forming machines can be divided into ① deviation ② scratches ③ "indenter" phenomenon ④ "drill belt" phenomenon. In order to let everyone understand the common faults of the molding machine in detail, we will introduce ③ "indenter" phenomenon.
Detail
Common faults of used welded pipe mills production line forming machines can be divided into ① deviation ② scratches ③ "indenter" phenomenon ④ "drill belt" phenomenon. In order to let everyone understand the common faults of the molding machine in detail, we will introduce ③ "indenter" phenomenon.
Common faults of used welded pipe mills production line forming machines (4)
Common faults of used welded pipe mills production line forming machines (4)
Common faults of used welded pipe mills production line forming machines can be divided into ① deviation. ② scratches. ③ "indenter" phenomenon. ④ "drill belt" phenomenon. In order to let everyone understand the common faults of the molding machine in detail, we will introduce ② scratches.
Detail
Common faults of used welded pipe mills production line forming machines can be divided into ① deviation. ② scratches. ③ "indenter" phenomenon. ④ "drill belt" phenomenon. In order to let everyone understand the common faults of the molding machine in detail, we will introduce ② scratches.
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