Large-specification bar hole pattern design method

A pass design, large-scale technology, applied in design optimization/simulation, special data processing applications, geometric CAD, etc., can solve problems such as the accuracy of pass design cannot be guaranteed, and the applicability has not been studied, so as to achieve convenient computer holes. Type design, improve flexibility and finished product accuracy, easy to operate

Pending Publication Date: 2022-01-14
NANJING IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it can only guide the bar size from 16 to 90mm. No research has been done on the applicability of bars with larger sizes, and the simulation software cannot be used to simulate the pass design method, which cannot guarantee the accuracy of the pass design.

Method used

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  • Large-specification bar hole pattern design method
  • Large-specification bar hole pattern design method
  • Large-specification bar hole pattern design method

Examples

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example 1

[0052] The relative spread formula is: b=B×β, where b is the width of the rolled piece, B is the preset width of the rolled piece, and β is the relative spread coefficient; where K 1 Influence coefficient of steel type, K 2 is the temperature influence coefficient, λ is the reduction coefficient, and δ is the section shape coefficient; among them, λ reflects the parameter of reduction influence, λ=h c / H c , h c is the height of rolled piece after rolling, H c is the height of the rolled piece before rolling;

[0053] δreflects the parameter affected by the shape of the rolled piece, δ=B / H c ;

[0054] Now given the following data: Pass area F after rolling 1 =9293, pass area F before rolling 2 =10604, the width of the rolled piece after rolling b 1 =95.19, preset rolling width b 2 =100; wherein, the above-mentioned pass area after rolling and the width of the rolled piece after rolling are substituted into the formula h c1 =F 1 / b 1 Calculate the height h of the ro...

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Abstract

The invention discloses a large-specification bar hole pattern design method, and belongs to technical field of hole pattern structures for continuous bar production. The method comprises the following steps: calculating a total elongation coefficient according to the cross-sectional area of a rolled piece before rolling and the cross-sectional area of a finished product; determining an elongation coefficient of each pass according to the total elongation coefficient, and further calculating the pass area; calculating a width of the rolled piece by combining the pass area, a width of the rolled piece after rolling and preset parameters with a relative broadsiding formula; comparing the width of the rolled piece with a preset width of the rolled piece, if a comparison result is not within a preset range, modifying the preset width of the rolled piece according to preset conditions to enable the comparison result to be within the preset range, and obtaining a final preset width of the rolled piece; and performing simulation by using Marc software to obtain a section size and equivalent strain distribution cloud picture of the rolled piece. The method has the advantage that the accuracy and efficiency of pass design calculation results are improved.

Description

technical field [0001] The invention belongs to the technical field of pass structure for continuous bar production, and relates to a pass design method for large-size bars. Background technique [0002] At present, bars are widely used in construction, machinery, automobiles, ships and other industrial fields, of which 70% of bars are used in construction, and the rest are used for various shafts, bolts, nuts, springs and other materials. With the continuous development of the national economy, the quality requirements for bars are gradually becoming stricter. The surface quality and dimensional accuracy of bars are related to the processing and quality of downstream products. However, at present, we cannot use strict mathematical formulas to describe the deformation process in the bar production process. The dimensional accuracy of bar products is manually adjusted and controlled by experience, resulting in low dimensional accuracy and large fluctuations of bar products. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/17G06F30/20
CPCG06F30/17G06F30/20
Inventor 席波章小峰李佑河黄贞益唐鑫唐立志邢梅林方敏
Owner NANJING IRON & STEEL CO LTD
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