Equal arc tangent hole pattern system

Abstract

The equant arc tangent pass system comprises a box pass module, a pre-segmentation module and a segmentation module which are arranged in sequence and used for arranging material patterns, the first two passes of the box pass module are of a double-flat rolling structure, the slope of the pass side wall of the box pass module ranges from 8 degrees to 12 degrees, and the pre-segmentation module is connected with the segmentation module. The hole pattern of the pre-segmentation module is of an equally-divided arc tangent structure, the segmentation hole pattern of the segmentation module is set according to the segmentation number and the pre-segmentation hole pattern, after the overall hole pattern height and the segmentation fillet are set, the hole pattern height and the segmentation fillet are tangent to the straight line, and meanwhile the segmentation roll gap is kept consistent with the roll gap of the roll body. According to the equant arc tangent pass system, the double-flat rolling technology is adopted before the box pass, the inclination of the side wall of the box pass is 8-12 degrees, and equant arc tangency is adopted for pre-segmentation sorties; and the segmentation of the whole hole pattern system is more stable.

Description

technical field [0001] The invention relates to a two-slicing system for rolled steel bars, in particular to a system for tangentially dividing circular arcs, and belongs to the technical field of two-slicing and multi-slicing production lines for rolled steel bars. Background technique [0002] In the slitting hole system, before pre-slicing, box-shaped holes are used to arrange the material pattern. The pre-slicing hole base circle is set first, and the cutting belt is tangentially completed by straight lines. The hole pattern is directly tangent to the two circles by a straight line. To complete the entire slitting hole system, in the production process, there are the following topics: [0003] 1. In the production process, it is difficult to control the material type, and the phenomenon of roll alignment often occurs, resulting in frequent adjustment of the material type and forced to replace the rolls; [0004] 2. Due to the type of material, the rolling mill needs to...

AI Technical Summary

Problems solved by technology

[0003] 1. In the production process, it is difficult to control the material type, and the phenomenon of roll alignment often occurs, resulting in frequent adjustment of the material type and forced to replace the roll;

[0004] 2. Due to the type of material, the rolling mill needs to frequently press the material, the rolling torque is large, the current of the rolling mill is high, and the current exceeds the rated current, which is prone to damage to the motor equipment;

[0005] 3. The shape of the rolled piece entering the pre-finishing mill is unstable, and the control of the line difference is unstable. The negative difference of each steel product is different, the fluctuation is large, the control is difficult, and it is easy to cause the risk of the negative difference exceeding the standard;

[0006] 4. The pre-cutting pass has a cutting angle of 60~70°. When entering the cutting pass, the sharp points press against each other, the gap is large, and it is easy to shake and stack steel;

[0007] 5. The diameter of the middle point of the existing cutting pass is larger than the diameter of the roll body, which is inconvenient for storage and transportation, and may easily cause the risk of breaking the cutting point;

[0008] 6. The slitting tip of the slitting roll is fast worn and the consumption of the roll is high;

[0009] 7. The existing pass system is a round pass for the middle rolling stage, and a flat roll before the box type, resulting in the material width cannot be released, the material width fluctuates greatly, and it is easy to fall before the flat roll The risk of steel and stacked steel;

[0010] 8. The area of ​​the box-shaped pass does not match the area of ​​the pre-cut pass, resulting in the bottom of the box-shaped hole not being worn, and it is impossible to better provide a suitable material size for the pre-cutting sortie;

[0011] 9. In the prior art, the elongation coefficient of flat-case-pre-cut-cutting is unstable, and the stability of the whole rolling is poor.

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