Steel pipe heading machine Heading mold inner cavity working surface molding line
A technology in the working surface and in the mold, which is applied in the field of steel pipe production equipment, the inner cavity of the steel pipe heading machine, and the molding line of the inner cavity of the mold, which can solve the problems of increasing force on the mold, reducing the service life of the mold, deformation, etc.
Active Publication Date: 2015-11-04
常州常宝精特钢管有限公司
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Problems solved by technology
[0004] The working surface of the inner cavity of the existing deformation working section is conical, and the profile line of the working surface is an oblique straight line. However, in the process of steel pipe heading, after the steel pipe enters the deformation working section from the guiding working section, due to the absolute amount of deformation of the steel pipe Invariably, during the whole process of the steel pipe from the deformation working section to the sizing working section, the force on the mold caused by the deformation of the steel pipe is getting bigger and bigger, and the force on the connection between the deformation working section and the sizing working section is the largest. This causes abnormal wear and deformation of the mold, which reduces the service life of the mold, and it is urgent to improve the molding line of the inner cavity of the head mold
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[0021] The present invention will be further described below through the description of specific embodiments in conjunction with the accompanying drawings.
[0022] Typical specific examples, such as attached Figure 1~3 shown.
[0023] A working profile of the inner cavity of the head die of a steel pipe heading machine, the profile of the working surface is composed of a guiding section 1, a deformation section 2 and a sizing section 3, which are sequentially connected through transitions, and the deformation section 2 is along the steel pipe advancing direction, It is a structural form of equal deformation ratio with equal spacing and equal diameter reduction ratio to gradually reduce its inner diameter.
[0024] And the inner diameter of each subsection of the equal-deformation ratio structure whose inner diameter is gradually reduced by the equal spacing and equal diameter-reduction ratio satisfies the following calculation formula:
[0025] D. n =D 1 ×△ n-1
[0026...
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The invention discloses a working face molded line of an inner cavity of a heading die of a steel tube heading machine. The working face molded line is formed by sequentially connecting a guide working section (1), a deformation working section (2) and a sizing working section (3) in a transition mode. The working face molded line is mainly characterized in that the deformation working section (2) is of the structural type that equal deformation ratio of the inner diameter of the deformation working section is gradually reduced at equal intervals and equal reducing ratios in the forward direction of a steel tube. The working face molded line has the advantages that the deformation ratio of the deformation working section is equal from beginning to end, the die is not prone to being abraded and deformed, and the service life is long.
Description
technical field [0001] The invention relates to a molding line of the inner cavity working surface of a heading mold of a steel pipe header, which belongs to the steel pipe production equipment technology. Background technique [0002] The head die of the steel pipe head machine is generally a four-opening and closing die, each of which occupies 1 / 4 of the entire die, and the four dies are combined into one through the device, and it can be opened and closed very flexibly. [0003] And the working surface of the inner cavity of the head die is composed of a guiding working section, a deforming working section and a sizing working section successively transitioning and connecting along the steel pipe advancing direction. [0004] The working surface of the inner cavity of the existing deformation working section is conical, and the profile line of the working surface is an oblique straight line. However, in the process of steel pipe heading, after the steel pipe enters the de...
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IPC IPC(8): B21D37/10B21D19/08
Inventor 王刚
Owner 常州常宝精特钢管有限公司