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Round steel rolling system

A round bar and rolling mill technology, applied in the field of steel rolling, can solve the problems of head bending yield and low dimensional accuracy of rolled pieces, and achieve the effects of reducing head cutting, improving dimensional accuracy and improving yield.

Pending Publication Date: 2021-12-03
DAYE SPECIAL STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a rolling system of round steel to solve the problems of low dimensional accuracy of finished rolled pieces, severe head bending and low yield

Method used

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Examples

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Effect test

Embodiment 1

[0052] This embodiment is designed with the φ75 specification round steel as an example, as follows:

[0053] (1) φ75 finished product and gauge round pass design: such as figure 2 As shown, the design pass height is 75.68mm, width is 76.23mm, roll gap is 6mm, expansion angle is 25°, arc radius is 45.21mm, groove bottom arc radius is 37.84mm, notch arc radius is 2mm .

[0054] (2) Guide design: The inlet guide of the round rolling mill adopts the RE140 guide assembly, and the diameter of the inner hole of the pre-guide plate is designed to be φ90mm. Such as image 3 As shown, the guide roller design: the diameter is designed to be φ126mm, and the height is 140mm. Guide roller pass: the opening angle of the pass is 100°, the width is 78.7mm, and the fillet radius at the bottom of the hole is 20mm. The inner diameter of the exit guide is designed to be φ90mm.

[0055] (3) The elongation rate of the circular rolling mill is 1.025, and the effective height of the rolled piece ...

Embodiment 2

[0058] This embodiment is designed with the φ55 specification round steel as an example, as follows:

[0059] (1) φ55 finished product and gauge round pass design: such as Figure 4 As shown, the design pass height is 55.80mm, the width is 56.50mm, the roll gap is 5mm, the expansion angle is 25°, the arc radius is 37.60mm, the groove bottom arc radius is 27.90mm, and the notch arc radius is 2mm .

[0060] (2) Guide design: The inlet guide of the round rolling mill adopts the RE110 guide assembly, and the diameter of the inner hole of the pre-guide plate is designed to be φ70mm. Such as Figure 5 As shown, the guide roller design: the diameter is designed to be φ113mm, and the height is 127mm. Guide roller pass: the opening angle of the pass is 100°, the width is 74mm, and the fillet radius at the bottom of the hole is 20mm. The inner diameter of the exit guide is designed to be φ68mm.

[0061] (3) The elongation rate of the circular rolling mill is 1.028, and the effectiv...

Embodiment 3

[0064] This embodiment is designed with the φ130 specification round steel as an example, as follows:

[0065] (1) φ130 finished product and gauge round pass design: such as Image 6 As shown, the design pass height is 131.88mm, width is 133.09mm, roll gap is 8mm, expansion angle is 20°, arc radius is 89.29mm, groove bottom arc radius is 65.94mm, notch arc radius is 4mm .

[0066] (2) Guide design: The inlet guide of the round rolling mill adopts the RE180 guide assembly, and the diameter of the inner hole of the pre-guide plate is designed to be φ152mm. Such as Figure 7 As shown, the design of the guide roller: the diameter is designed to be φ200mm, and the height is 186mm. Guide roller pass: the opening angle of the pass is 100°, the width is 148.6mm, and the fillet radius at the bottom of the hole is 60mm. The inner diameter of the exit guide is designed to be φ150mm.

[0067] (3) The elongation rate of the circular rolling mill is 1.024, and the effective height of t...

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Abstract

The invention provides a round steel rolling system. The rolling system comprises two finished rolling mills and a rounding rolling mill which are sequentially arranged, wherein a pass system of the rolling system is an oval-round-round pass, and the pass of the rounding rolling mill is the same as that of the finished rolling mills. According to the rolling system, the size precision and the head bending degree of a finished rolled piece can be improved, the quality grade of round steel is improved, the satisfaction degree of a user is improved, and quality objection caused by the outline dimension is reduced.

Description

technical field [0001] The invention belongs to the technical field of steel rolling, and in particular relates to a round steel rolling system. Background technique [0002] At present, round steel is hot-rolled by a two-roll mill, and the pass system of the last two passes often adopts an ellipse-round pass. Due to the two-roll rolling, the deformation is not uniform, and the influence of the axial clearance of the rolling mill, The rolling is unstable, the size of the finished rolled piece fluctuates greatly, the tolerance is easy to exceed the standard, and the ear and bending of the steel head are serious (such as figure 1 shown), the finishing cut increases the workload, and the finished product rate is low. [0003] Therefore, it is necessary to provide an improved technical solution for the above-mentioned deficiencies in the prior art. Contents of the invention [0004] The purpose of the present invention is to provide a rolling system of round steel to solve t...

Claims

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Application Information

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IPC IPC(8): B21B1/18B21B27/02B21B39/16
CPCB21B1/18B21B27/024B21B39/165
Inventor 徐政新吴涛胡金洲龙开西
Owner DAYE SPECIAL STEEL CO LTD
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