A drawing process of ultra-long finished tube
A drawing process and finished product technology, applied in the direction of wire drawing dies, etc., can solve problems such as mold ejection, poor effect of super long tubes, failure to meet contract requirements, etc., and achieve the effect of simple operation
Active Publication Date: 2016-03-09
SHANXI TAIGANG STAINLESS STEEL CO LTD
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AI Technical Summary
Problems solved by technology
[0002] Small tube contracts often require a length of more than 13m. According to the current drawing device capacity, the contract requirements cannot be fulfilled at all. At present, the maximum drawing capacity of the drawing machine is 12.5m, so it is necessary to increase the drawing capacity of the drawing machine to meet the needs of users. requirements
[0003] At present, in the drawing process, the mold with the steel pipe is directly placed on the drawing trolley, which is easy to operate and has a small workload, but the effect is not good when drawing an ultra-long pipe, and the steel pipe is severely bent after drawing, and the drawing process The middle mold will pop out
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment
[0020] The maximum stroke of the drawing trolley before improvement is 12.5m, so the maximum drawing length can only be 12.5m, which cannot meet the production requirements of the process. After the improvement, it can draw steel pipes up to 16m in length.
[0021] After deformation, the length is less than the stroke of the drawing trolley, so it can be drawn; if the deformed length is greater than the stroke of the drawing trolley, it cannot be drawn normally, and the drawing production is carried out according to the improvement.
[0022] In this embodiment, the length of the feed material is 11m as an example:
[0023] Deformation elongation of steel pipe = (outer diameter of incoming material - wall thickness of incoming material) * wall thickness of incoming material / (outer diameter of finished product - wall thickness of finished product) / wall thickness of finished product = 1.45;
[0024] Length after drawing = incoming length * deformation elongation = 11m * 1.45...
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Abstract
The invention discloses a drawing process for an ultra-long finished pipe, which belongs to the technical field of ultra-long pipe preparation. In the present invention, the drawing trolley is used to normally draw the steel pipe, and when a certain length is reached, the drawing outer mold and the drawn steel pipe are placed together on the mandrel trolley, and the two round pipes on the mandrel trolley play the role of centering and supporting , the drawing outer mold is fixed under the action of the upper channel steel and the lower support, and then drawn by a drawing trolley. The method greatly improves the maximum drawing length of the drawing machine, can meet the user's requirement for increased steel pipe length; can ensure the straightness of the steel pipe after drawing; and is simple, convenient, safe and reliable in operation.
Description
technical field [0001] The invention relates to a drawing process of an ultra-long finished tube, and belongs to the technical field of ultra-long tube preparation. Background technique [0002] Small tube contracts often require a length of more than 13m. According to the current drawing device capacity, the contract requirements cannot be fulfilled at all. At present, the maximum drawing capacity of the drawing machine is 12.5m, so it is necessary to increase the drawing capacity of the drawing machine to meet the needs of users. requirements. [0003] At present, in the drawing process, the mold with the steel pipe is directly placed on the drawing trolley, which is easy to operate and has a small workload, but the effect is not good when drawing an ultra-long pipe, and the steel pipe is severely bent after drawing, and the drawing process The medium mold will pop out. Contents of the invention [0004] The invention provides a drawing process for ultra-long finished ...
Claims
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IPC IPC(8): B21C1/24B21C3/12
Inventor 黎毅康喜唐王彦忠侯楠郝宝红
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD