CN212168529U - A pre-finishing roll assembly with universal holes suitable for high-speed wire rod - Google Patents

Abstract

A roll assembly before finish rolling with universal holes suitable for high-speed wire rods relates to the field of rolls before finish rolling. The high-speed wire rod production line comprises two finish rolling front rollers, wherein the groove formed between the two finish rolling front rollers is a double-arc circular groove and consists of an inner arc and an outer arc, two sides of the inner arc are internally tangent to the outer arc, and the outer arc extends to a notch plane, so that the finish rolling front rollers do not need to be replaced when the high-speed wire rod is switched among different product specifications, a middle circular material with the sectional area of 220 plus 337mm2 can be produced, and the requirement of the middle material type of the finish rolling machine of different manufacturers on producing the high-speed wire rod product specification of 5.5-16mm is met.

Description

A pre-finishing roll assembly with universal holes suitable for high-speed wire rod

technical field

The utility model relates to the field of pre-finishing rolling rolls, in particular to a pre-finishing rolling roll assembly with universal holes suitable for high-speed wire rods.

Background technique

In the domestic high-speed wire rod production industry, the layout of rolling mills is mostly 12 (or 14) for roughing and intermediate rolling, 6 (or 4) for pre-finishing, 10 for finishing, and 4 for reducing and sizing units after finishing. 2 mini rolling mills and other forms, the pass system used is almost similar, the rough rolling adopts box type + ellipse-round pass system, some steel mills use non-pass flat roll mill instead of box type + ellipse- 6 frames deformed before the round hole rough rolling.

In terms of general hole patterns, most domestic enterprises currently produce 5.5-16mm and other product specifications. The first 14 holes are common, and the 15-18 roller rings use two or more hole patterns, which are pre-finished each time the specification is changed. Rolling rings must be replaced with different pass types; a few companies have reported that 1-17 passes can be universal, (17 passes are oval passes), and most companies use non-shared (multiple) 18 Frame hole structure. The existing problems and deficiencies are as follows:

(1) At present, the common finishing mill manufacturers in China include Morgan, SMS, Danieli, Hafei, etc. Most of the pre-finishing exports are round intermediate materials. After 1-17 passes are common, circular passes with different parameters need to be designed. Not only does the number of spare rolls increase due to the uncommon pass pattern, but also 18 pass patterns must be replaced when changing different specifications, which increases the workload;

(2) The distance between pre-finishing and finishing mills in most domestic enterprises is long, and 1-2 water tanks are set to control the rolling temperature. The flat oval material type has a fast local cooling rate and uneven cooling during the cooling process. Secondly, the flat oval material type is more difficult to produce and has more accidents than the oval material type in the production process.

SUMMARY OF THE INVENTION

In view of the deficiencies in the prior art, the purpose of the present invention is to provide a pre-finishing rolling roll assembly with universal holes suitable for high-speed wire rods.

The technical scheme adopted by the utility model is: a pre-finishing roll assembly with universal holes suitable for high-speed wire rods, comprising two pre-finishing rolls used together, and the technical point is that one of the two pre-finishing rolls is An adjustable general hole structure is formed between the two sides. The general hole structure is a double arc circular hole, which is composed of an inner arc and an outer arc. Both sides of the inner arc are inscribed with the outer arc, and the outer arc extends to Slot plane, and inner arc radius < outer arc radius.

In the above scheme, the roll gaps of the two rolls before finishing rolling are adjustable, and the intermediate round material with a cross-sectional area of 220-337 mm ² is produced between the two rolls before finishing rolling.

The beneficial effects of the utility model are: the pre-finishing roll assembly with universal holes suitable for high-speed wire rods comprises two pre-finishing rolls, and the hole pattern formed between the two pre-finishing rolls is a double arc circle The pass is composed of an inner arc and an outer arc. The two sides of the inner arc are inscribed with the outer arc, and the outer arc extends to the notch plane, so that the high-speed wire rod does not need to replace the rolls before finishing rolling when switching between different product specifications. , which can produce intermediate round materials with a cross-sectional area of 220-337mm2, which can meet the requirements of intermediate materials entering the finishing mills of different manufacturers when producing high-speed wire rod product specifications of 5.5-16mm.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only of the present invention. For some embodiments of the present invention, for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

1 is a schematic diagram of a roll assembly before finishing rolling of a high-speed wire rod with universal holes in an embodiment of the present utility model;

2 is a schematic view of the pass structure between two roll assemblies before finishing rolling after adjusting the roll gap in the embodiment of the present utility model;

3 is a schematic diagram of another pass structure between two roll assemblies before finishing rolling after adjusting the roll seam in the embodiment of the present utility model;

The serial numbers in the figure are explained as follows: 1 roll before finishing rolling, 2 roll before finishing rolling, 3 inner arc, 4 outer arc, 5 roll gap.

Detailed ways

In order to make the above objects, features and advantages of the present utility model more obvious and easy to understand, the present utility model will be described in further detail below with reference to Fig. 1 to Fig. 3 and the specific embodiments.

The pre-finishing roll assembly with universal holes suitable for high-speed wire rods used in this embodiment includes two pre-finishing rolls 1 and 2 used together, and a roll gap between the pre-finishing roll 1 and the pre-finishing roll 2 5 Adjustable, an adjustable general pass structure is formed between roll 1 before finishing rolling and roll 2 before finishing rolling, and a common pass structure can be produced between the two rolls 1 and 2 before finishing rolling. 220-337mm ² cross-sectional area the middle round material. The general hole structure is a double arc circular hole, which is composed of an inner arc 3 and an outer arc 4. Both sides of the inner arc 3 are inscribed with the outer arc 4, and the outer arc 4 extends to the plane of the slot, and Radius of inner arc 3 < radius of outer arc 4.

At present, the domestic conventional coil size is 5.5-16mm, (17-20mm coil is less to be considered for the time being), the average elongation of Morgan, SMS, Danieli, Hafei and other finishing mills is about 1.25, and the production of 5.5-16 size is fine. The area of the 18-frame section steel before rolling is approximately as shown in the following table:

By adjusting the 18 roll gaps, the area of Fig. 2 is 220 mm2, and the area of Fig. 3 is 337 mm2, which meets the production requirements.

At present, our company has implemented universal hole type and material type. The main varieties produced are cold heading steel such as ML08Al and SWRCH22A, wire and electrode steel such as ER70S-6, H10Mn2 and H08A, PC steel bars such as 30MnSi and 35Si2Mn, 45, 60, 70, SWRH82A and other hard wires, YL77B, YL82B and other steel strands. Among them, ML08Al and SWRCH22A are produced by cold upsetting to 1/3 without cracking. The long-term supply of hard wires to an enterprise after drawing is 0.3-0.4mm, the minimum drawing size is 0.07mm, and the product quality is stable.

By sampling and checking the surface quality of each specification, no surface defects such as folding and scarring were found.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited to this. Replacement should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (2)

1. A pre-finishing roll assembly with universal holes suitable for high-speed wire rods, comprising two pre-finishing rolls used together, wherein an adjustable universal pass structure is formed between the two pre-finishing rolls , The general hole structure is a double arc circular hole, which consists of an inner arc and an outer arc. Both sides of the inner arc are inscribed with the outer arc, and the outer arc extends to the slot plane, and the radius of the inner arc is <Outer arc radius. 2. The pre-finishing roll assembly with universal holes suitable for high-speed wire rods as claimed in claim 1, wherein the roll gap of the two pre-finishing rolls is adjustable, and the gap between the two pre-finishing rolls is adjustable. The intermediate round material with a cross-sectional area of 220-337mm ² is produced in between.

Images