CN210125638U - Pass system for hot rolling ribbed steel bar phi 12mm five-segmentation rolling - Google Patents

Abstract

The utility model discloses a hot rolling ribbed bar phi 12mm five segmentation rolling pass system, roll supplied material round hole, K7 horizontal rolling mill plain-barreled roll through-hole, K6 horizontal rolling mill plain-barreled roll through-hole, K5 vertical rolling mill case type hole, K4 horizontal rolling mill pre-segmentation hole, K3 horizontal rolling mill segmentation hole, K2 horizontal rolling mill elliptical hole and K1 horizontal rolling mill finished product hole in K8; the ratio of the cross-sectional areas of 5 lines of the pre-splitting holes of the K4 horizontal rolling mill is 1.008:1:0.993:1:1.008 respectively, and the ratio of the cross-sectional areas of 5 lines of the splitting holes of the K3 horizontal rolling mill is as follows: 1.05:1:1: 1.05, wherein the width ratio of the pre-cutting hole of the K4 horizontal rolling mill to the middle hole of the cutting hole of the K3 horizontal rolling mill is 1.013, and the elongation rate of the cutting hole of the K3 horizontal rolling mill is 1.14; the utility model discloses a hot rolling ribbed bar phi 12mm five segmentation rolling pass system, solve in the rolling process because of the frequent groove that changes that the segmentation pass wearing and tearing arouse, continuous rolling time increases 2~3 times; the elongation of the splitting pass is low, and the rolling load of the splitting hole is reduced.

Description

Pass system for hot rolling ribbed steel bar phi 12mm five-segmentation rolling

Technical Field

The utility model relates to a five segmentation rolling system of ribbed steel bar phi 12mm, concretely relates to hot rolling ribbed steel bar phi 12mm five segmentation rolling pass system belongs to phi 12 mm's ribbed steel bar system of processing technical field.

Background

The five-slitting rolling technology of the hot-rolled ribbed bar is developed on the basis of three-wire slitting and four-wire slitting rolling technologies, and mainly adopts a dog-bone hole pattern system; the existing five-slitting rolling pass system for hot-rolled ribbed steel bars with the diameter of phi 12mm has defects, and firstly, when the design of pre-slitting (K4) and slitting (K3) is carried out, the change of the width (namely the width direction of a rolled piece) of the slitting hole (K3), the damage of the width deformation of the rolled piece and the consistency of the wedge angles of the front and the rear holes are not considered, so that the slitting wedge head of the slitting hole (K3) is broken into grooves, the deformation is overlarge, the abrasion of the grooves is too fast, and the tonnage of single-groove rolling is low; secondly, the wear of the pre-splitting holes is not considered, so that the cross sections of the five rolled pieces are inconsistent, the lengths and the weights of the five rolled pieces are further inconsistent, production accidents such as disorder of steel on a cooling bed and the like can be caused, and unqualified products with overlarge weight deviation of the rolled pieces can be produced; thirdly, the elongation of the pre-cutting holes and the elongation of the cutting holes are high, so that the pre-cutting holes (K4) are quickly worn, and the cutting holes (K3) are easy to break grooves; in the existing five-splitting pass, the pass abrasion is uneven because rolled pieces transversely deform from the middle to two sides, the difference of five lines is large and difficult to adjust in the production process, and the phenomena that the sizes of two sides (1 line and 5 lines) are small and the sizes of middle parts (2 lines, 3 lines and 4 lines) are large in five finished products appear in the early stage of the use of a rolling groove, namely the longitudinal ribs of the middle finished product exceed the upper limit of the standard, and the finished products on two sides have no longitudinal ribs; the sizes of two sides (1 line and 5 lines) of the groove are small in the later use stage, the middle (2 lines and 4 lines) is slightly larger, and the middle (3 lines) is the largest; for this reason, chinese patent application No.: 201721221378.X, discloses a pass system for five-segment rolling of bars, which comprises a medium-rolling incoming round hole, a K6 horizontal rolling mill flat roll through hole, a K7 horizontal rolling mill flat roll through hole, a K5 vertical rolling mill cabinet type hole, a K4 horizontal rolling mill pre-segmentation hole, a K3 horizontal rolling mill segmentation hole, a K2 horizontal rolling mill elliptical hole and a K1 horizontal rolling mill finished product hole, wherein the distances between the K4 horizontal rolling mill pre-segmentation hole and the adjacent base circle centers of the K3 horizontal rolling mill segmentation hole are consistent, the K4 horizontal rolling mill pre-segmentation hole and the K3 horizontal rolling mill segmentation hole have two wedge angles of 46 degrees, the K4 horizontal pre-segmentation hole and the K3 horizontal rolling mill segmentation hole have wedge angles of 50 degrees and 50.3 degrees respectively, the K4 horizontal pre-segmentation hole and the K3 horizontal rolling mill segmentation hole have the same middle wedge position, the wedge head of the K4 horizontal pre-segmentation hole is a large arc, the K4 horizontal rolling mill pre-segmentation hole is connected with the base circle rolling mill bottom wedge head of the small wedge 3 arc, the cutting hole of the K3 horizontal rolling mill is connected with the wedge head and the base circle through a tangent line; the difficult problem that the wedge tip of the splitting hole breaks the groove due to the fact that a rolled piece moves in a wide and transverse mode in the splitting process is solved, the accurate control of the five-splitting material type is achieved, the use tonnage of the groove is prolonged, and the five-splitting operation rate is improved; but the control accuracy of the five-segment material cutting type is not ideal.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model provides a pass system for hot rolling ribbed bar phi 12mm five-segmentation rolling, which solves the problem of frequent groove replacement caused by segmentation pass abrasion in the rolling process, and increases the continuous rolling time to 2-3 times; the problems of wide and transverse movement of rolled pieces and groove breaking of wedge tips of the splitting holes are solved, the accurate control of five-splitting material types is realized, the use tonnage of the rolling groove is prolonged, and the operation rate of five-splitting production is improved.

The utility model discloses a hot rolling ribbed bar phi 12mm five segmentation rolling pass system, including roll supplied material round hole, K7 horizontal rolling mill plain-barreled roll through-hole, K6 horizontal rolling mill plain-barreled roll through-hole, K5 vertical rolling mill shell type hole, K4 horizontal rolling mill pre-segmentation hole, K3 horizontal rolling mill segmentation hole, K2 horizontal rolling mill elliptical hole and K1 horizontal rolling mill finished product hole in K8; 5 holes are formed in the pre-splitting holes of the K4 horizontal rolling mill, the splitting holes of the K3 horizontal rolling mill, the elliptical holes of the K2 horizontal rolling mill and the finished holes of the K1 horizontal rolling mill; the ratio of the cross-sectional areas of 5 lines of the pre-splitting holes of the K4 horizontal rolling mill is 1.008:1:0.993:1:1.008 respectively, and the ratio of the cross-sectional areas of 5 lines of the splitting holes of the K3 horizontal rolling mill is as follows: 1.05:1:1: 1.05, wherein the width ratio of the pre-cutting hole of the K4 horizontal rolling mill to the middle hole of the cutting hole of the K3 horizontal rolling mill is 1.013, and the elongation rate of the cutting hole of the K3 horizontal rolling mill is 1.14; the K7 horizontal rolling mill flat roll through hole and the K6 horizontal rolling mill flat roll through hole are flat blank forming rolling mills, the K5 vertical rolling mill box-shaped hole is a control side rolling mill, the K4 horizontal rolling mill pre-splitting hole is a pre-splitting rolling mill, the K3 horizontal rolling mill splitting hole is a parallel rolled piece rolling mill processed to be identical in cross-sectional area, a rolled piece passes through the K3 horizontal rolling mill splitting hole and is connected with a strip with the thickness of 0.70-1.0 mm, the rolled piece is divided into 5 independent rolled pieces through a splitting wheel and a splitting blade of an outlet guide, the K2 horizontal rolling mill oval hole is a rolling mill for rolling 5 oval rolled pieces, and the rolled piece enters a K1 horizontal rolling mill finished product hole after being turned over for 90 degrees through the torsion guide; the finished hole of the K1 horizontal rolling mill is a rolling mill for processing 5 hot-rolled ribbed steel bar products.

In a preferred embodiment, the system comprises a seven pass finish rolling module, the total elongation is 4.13, and the average elongation is 1.224.

As a preferred embodiment, the pre-cut split hole roll gap of the K4 horizontal rolling mill is 2.6mm, the width of the middle hole is 15.2mm, the total width is 77mm, the wedge angle is 60 degrees, the base circle radius of 1 and 5 lines is 5.2mm at the outer side, 5.9mm at the inner side, the base circle radius of 2 lines and 4 lines is 5.8mm, and the base circle radius of 3 lines is 5.7 mm; the K3 horizontal rolling mill is pre-cut with a hole separating roll gap of 1mm, a middle hole width of 15.4mm, a total width of 79.2mm, a wedge angle of 51.85 degrees, and a base circle radius of 1-5 lines of 6.4 mm;

the medium rolling material is a round material with the diameter phi of 53mm, the roll gap of the flat roll through hole of the K7 horizontal rolling mill is 22mm, the roll gap of the flat roll through hole of the K6 horizontal rolling mill is 17 mm; the K5 vertical rolling mill box-shaped hole is box-shaped, the width of a hole type notch is 21mm, the width of a groove bottom is 17.0mm, the notch and the groove bottom are connected in a diagonal manner, the groove depth is 25.5mm, the K2 horizontal rolling mill elliptical hole is 24mm, the bottom circle radius is 25.5mm, the hole type height is 8mm, the bottom circle radius of a finished hole 1 of a K1 horizontal rolling mill is 5.6mm, and the hole type height is 11.2 mm.

Compared with the prior art, the utility model discloses a pass system that hot rolling ribbed steel bar phi 12mm five segmentation rolled;

1) the width of the splitting hole rolled piece is equal to the difference between the width of the pre-split hole K4 and the width of the pre-split hole K3, so that the probability of splitting the slot of the splitting hole wedge pointed head is reduced; 2) the elongation of the splitting pass is low, and the rolling load of the splitting hole is reduced; 3) the abrasion loss of the hole pattern of the pre-cutting hole is estimated according to different materials of the roller, so that the use tonnage of the pre-cutting hole-separating groove is improved; 4) the replacement time is reduced, and the operation rate is improved; the rolled piece is convenient to process, the production cost is reduced, and the rejection rate is reduced.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic diagram of the box-shaped hole structure of the K5 vertical rolling mill of the present invention.

Fig. 3 is the structural schematic diagram of the pre-cutting hole of the K4 horizontal rolling mill of the present invention.

Fig. 4 is the structural schematic diagram of the cutting hole of the K3 horizontal rolling mill of the present invention.

Fig. 5 is a schematic structural view of the elliptical hole of the K2 horizontal rolling mill of the present invention.

Fig. 6 is a schematic diagram of the finished hole structure of the K1 horizontal rolling mill of the present invention.

Detailed Description

Example 1:

the pass system for hot-rolled ribbed bar phi 12mm five-slitting rolling shown in fig. 1 comprises a round rolling feed hole in K8, a flat roll through hole of a K7 horizontal rolling mill, a flat roll through hole of a K6 horizontal rolling mill, a box-shaped hole of a K5 vertical rolling mill, a pre-slitting hole of a K4 horizontal rolling mill, a slitting hole of a K3 horizontal rolling mill, an elliptical hole of a K2 horizontal rolling mill and a finished hole of the K1 horizontal rolling mill; 5 holes are formed in the pre-splitting holes of the K4 horizontal rolling mill, the splitting holes of the K3 horizontal rolling mill, the elliptical holes of the K2 horizontal rolling mill and the finished holes of the K1 horizontal rolling mill; the ratio of the cross-sectional areas of 5 lines of the pre-splitting holes of the K4 horizontal rolling mill is 1.008:1:0.993:1:1.008 respectively, and the ratio of the cross-sectional areas of 5 lines of the splitting holes of the K3 horizontal rolling mill is as follows: 1.05:1:1: 1.05, wherein the width ratio of the pre-cutting hole of the K4 horizontal rolling mill to the middle hole of the cutting hole of the K3 horizontal rolling mill is 1.013, and the elongation rate of the cutting hole of the K3 horizontal rolling mill is 1.14; the K7 horizontal rolling mill flat roll through hole and the K6 horizontal rolling mill flat roll through hole are flat blank forming rolling mills, the K5 vertical rolling mill box-shaped hole is a control side rolling mill, the K4 horizontal rolling mill pre-splitting hole is a pre-splitting rolling mill, the K3 horizontal rolling mill splitting hole is a parallel rolled piece rolling mill processed to be identical in cross-sectional area, a rolled piece passes through the K3 horizontal rolling mill splitting hole and is connected with a strip with the thickness of 0.70-1.0 mm, the rolled piece is divided into 5 independent rolled pieces through a splitting wheel and a splitting blade of an outlet guide, the K2 horizontal rolling mill oval hole is a rolling mill for rolling 5 oval rolled pieces, and the rolled piece enters a K1 horizontal rolling mill finished product hole after being turned over for 90 degrees through the torsion guide; the finished hole of the K1 horizontal rolling mill is a rolling mill for processing 5 hot-rolled ribbed steel bar products.

The system comprises seven-pass finish rolling modules, the total elongation is 4.13, and the average elongation is 1.224.

As shown in fig. 2 to 6, the K4 horizontal rolling mill has a precut hole-dividing roll gap of 2.6mm, a middle hole width of 15.2mm, a total width of 77mm, a wedge angle of 60 °, and the base circle radius of 1 and 5 lines is 5.2mm at the outer side, 5.9mm at the inner side, 5.8mm at the base circle radius of 2 lines and 4 lines, and 5.7mm at the base circle radius of 3 lines; the K3 horizontal rolling mill is pre-cut with a hole separating roll gap of 1mm, a middle hole width of 15.4mm, a total width of 79.2mm, a wedge angle of 51.85 degrees, and a base circle radius of 1-5 lines of 6.4 mm; the medium rolling material is a round material with the diameter phi of 53mm, the roll gap of the flat roll through hole of the K7 horizontal rolling mill is 22mm, the roll gap of the flat roll through hole of the K6 horizontal rolling mill is 17 mm; the K5 vertical rolling mill box-shaped hole is box-shaped, the width of a hole type notch is 21mm, the width of a groove bottom is 17.0mm, the notch and the groove bottom are connected in a diagonal manner, the groove depth is 25.5mm, the K2 horizontal rolling mill elliptical hole is 24mm, the bottom circle radius is 25.5mm, the hole type height is 8mm, the bottom circle radius of a finished hole 1 of a K1 horizontal rolling mill is 5.6mm, and the hole type height is 11.2 mm.

The above-mentioned embodiment is only the preferred embodiment of the present invention, so all the equivalent changes or modifications made by the structure, features and principles of the present invention are included in the claims of the present invention.

Claims (3)

1. A pass system for hot rolling of a ribbed steel bar phi 12mm through five-segmentation rolling comprises a round rolled material hole in K8, a flat roll through hole of a K7 horizontal rolling mill, a flat roll through hole of a K6 horizontal rolling mill, a box-shaped hole of a K5 vertical rolling mill, a pre-segmentation hole of a K4 horizontal rolling mill, a segmentation hole of a K3 horizontal rolling mill, an elliptical hole of a K2 horizontal rolling mill and a finished product hole of the K1 horizontal rolling mill; 5 holes are formed in the pre-splitting holes of the K4 horizontal rolling mill, the splitting holes of the K3 horizontal rolling mill, the elliptical holes of the K2 horizontal rolling mill and the finished holes of the K1 horizontal rolling mill; the method is characterized in that: the ratio of the cross-sectional areas of 5 lines of the pre-splitting holes of the K4 horizontal rolling mill is 1.008:1:0.993:1:1.008 respectively, and the ratio of the cross-sectional areas of 5 lines of the splitting holes of the K3 horizontal rolling mill is as follows: 1.05:1:1: 1.05, wherein the width ratio of the pre-cutting hole of the K4 horizontal rolling mill to the middle hole of the cutting hole of the K3 horizontal rolling mill is 1.013, and the elongation rate of the cutting hole of the K3 horizontal rolling mill is 1.14; the K7 horizontal rolling mill flat roll through hole and the K6 horizontal rolling mill flat roll through hole are flat blank forming rolling mills, the K5 vertical rolling mill box-shaped hole is a control side rolling mill, the K4 horizontal rolling mill pre-splitting hole is a pre-splitting rolling mill, the K3 horizontal rolling mill splitting hole is a parallel rolled piece rolling mill processed to be identical in cross-sectional area, a rolled piece passes through the K3 horizontal rolling mill splitting hole and is connected with a strip with the thickness of 0.70-1.0 mm, the rolled piece is divided into 5 independent rolled pieces through a splitting wheel and a splitting blade of an outlet guide, the K2 horizontal rolling mill oval hole is a rolling mill used for rolling 5 oval rolled pieces, and the rolled piece enters a K1 horizontal rolling mill finished product hole after being turned over for 90 degrees through the torsion guide; the finished hole of the K1 horizontal rolling mill is a rolling mill for processing 5 hot-rolled ribbed steel bar products.

2. The pass system for hot-rolled ribbed bar phi 12mm five-segment rolling according to claim 1, characterized in that: the system comprises seven-pass finish rolling modules, the total elongation is 4.13, and the average elongation is 1.224.

3. The pass system for hot-rolled ribbed bar phi 12mm five-segment rolling according to claim 1, characterized in that: the K4 horizontal rolling mill is precut with a hole separating roll gap of 2.6mm, a middle hole of 15.2mm, a total width of 77mm, a wedge angle of 60 degrees, a base circle radius of 1 line and 5 lines of 5.2mm at the outer side, a base circle radius of 5.9mm at the inner side, a base circle radius of 5.8mm at the 2 line and 4 line and a base circle radius of 5.7mm at the 3 line; the K3 horizontal rolling mill is pre-cut with a hole separating roll gap of 1mm, a middle hole width of 15.4mm, a total width of 79.2mm, a wedge angle of 51.85 degrees, and a base circle radius of 1-5 lines of 6.4 mm;

the medium rolling material is a round material with the diameter phi of 53mm, the roll gap of the flat roll through hole of the K7 horizontal rolling mill is 22mm, the roll gap of the flat roll through hole of the K6 horizontal rolling mill is 17 mm; the K5 vertical rolling mill box-shaped hole is box-shaped, the width of a hole type notch is 21mm, the width of a groove bottom is 17.0mm, the notch and the groove bottom are connected in a diagonal manner, the groove depth is 25.5mm, the K2 horizontal rolling mill elliptical hole is 24mm, the bottom circle radius is 25.5mm, the hole type height is 8mm, the bottom circle radius of a finished hole 1 of a K1 horizontal rolling mill is 5.6mm, and the hole type height is 11.2 mm.

Images