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Production method of SD420W corrugated steel bar

A production method and technology of bamboo steel bars, applied to bending workpieces, metal processing equipment, metal rolling, etc., can solve the problems of low pass rate of production methods, and achieve uniform and stable longitudinal rib size, high reliability, and product pass rate Improved effect

Active Publication Date: 2019-03-01
GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of this invention is to provide a kind of production method of SD420W bamboo steel bar, to solve the problem that the pass rate of existing production method is low

Method used

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  • Production method of SD420W corrugated steel bar
  • Production method of SD420W corrugated steel bar
  • Production method of SD420W corrugated steel bar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Embodiment 1, the used finishing mill of producing D25 title SD420W bamboo joint steel bar comprises K1 frame 1, K2 frame 2, K3 frame 3, K4 frame 4, K5 frame 5 and K6 frame 6, and the production process is as follows :

[0060] A. If figure 2 As shown, the first vertical looper 7 is set between the K6 frame 6 and the K5 frame 5 of the finishing mill, the second vertical looper 8 is set between the K5 frame 5 and the K4 frame 4, and the K4 machine The third vertical looper 9 is set between frame 4 and K3 frame 3, the fourth vertical looper 10 is set between K3 frame 3 and K2 frame 2, between K2 frame 2 and K1 frame 1 Between install the fifth vertical looper 11, such as image 3 As shown, the distance L between the two shaping rollers 14 of the fifth vertical looper 11 is 1700mm;

[0061] B. If Figure 4 , Figure 6 As shown, the passes of K6 stand 6 and K4 stand 4 of the finishing mill are all set to ellipse; as Figure 5 , Figure 7 , Figure 9 As shown, the h...

Embodiment 2

[0066] Embodiment 2, the finishing mill used in the production of D22 title SD420W bamboo steel bar includes K1 frame 1, K2 frame 2, K3 frame 3, K4 frame 4, K5 frame 5 and K6 frame 6, the production process is as follows :

[0067] A. If figure 2 As shown, the first vertical looper 7 is set between the K6 frame 6 and the K5 frame 5 of the finishing mill, the second vertical looper 8 is set between the K5 frame 5 and the K4 frame 4, and the K4 machine The third vertical looper 9 is set between frame 4 and K3 frame 3, the fourth vertical looper 10 is set between K3 frame 3 and K2 frame 2, between K2 frame 2 and K1 frame 1 Between install the fifth vertical looper 11, such as image 3 As shown, the distance L between the two shaping rollers 14 of the fifth vertical looper 11 is 1700mm;

[0068] B. If Figure 4 , Figure 6 As shown, the passes of K6 stand 6 and K4 stand 4 of the finishing mill are all set to ellipse; as Figure 5 , Figure 7 , Figure 9 As shown, the hole...

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Abstract

The invention discloses a production method of SD420W corrugated steel bar, and belongs to the field of metal calendaring. The problem of low qualification rate of an existing production method is solved. The production method of the SD420W corrugated steel bar comprises the following steps that a first vertical loop is arranged between a K<6> machine frame and a K<5> machine frame of a finishingmill, a second vertical loop is arranged between the K<5> machine frame and a K<4> machine frame, a third vertical loop is arranged between the K<4> machine frame and a K<3> machine frame, and a fourth vertical loop is arranged between the K<3> machine frame and a K<2> machine frame. The hole types of the K<6> machine frame and K<4> machine frame of the finishing mill are arranged to be oval, thehole types of the K<5> machine frame, the K<3> machine frame and the K<1> machine frame are arranged to be round, and the hole type of the K<2> machine frame is arranged to be flat oval; the loop quantity, loop starting delay time and sleeve dropping delay time of each vertical loop are set, and the rolling parameters of the finishing mill are set for rolling. According to the production method ofthe SD420W corrugated steel bar, the dimensional accuracy of a finished product of the SD420W corrugated steel bar is improved, the qualified rate of the product is greatly improved, and the production costs are reduced.

Description

technical field [0001] The invention belongs to the field of metal rolling, and in particular relates to a production method of SD420W bamboo-jointed steel bars. Background technique [0002] Bamboo-jointed steel bars are mainly divided into two categories, one is bamboo-jointed steel bars for threaded connectors, which are rarely used on site; the other is general-purpose bamboo-jointed steel bars, which are widely used. The SD420W bamboo steel bars involved in the present invention belong to general bamboo steel bars. The transverse ribs and longitudinal ribs of this kind of bamboo steel bars intersect together, and the requirements for the dimensional accuracy of the inner diameter, transverse ribs, and longitudinal ribs are relatively high, and the production is difficult. . [0003] The smelting and rolling process of SD420W bamboo steel bar is: converter smelting, LF refining, casting, continuous casting slab, rolling steel heating, rough rolling, finishing rolling, p...

Claims

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Application Information

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IPC IPC(8): B21B1/16B21B41/00
CPCB21B1/16B21B41/00
Inventor 王洪锋史斌何新江
Owner GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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