WO2012155854A1

WO2012155854A1 - Rolling mill

Info

Publication number: WO2012155854A1
Application number: PCT/CN2012/075656
Authority: WO
Inventors: 娄霆; 熊化平
Original assignee: 合肥市百胜科技发展股份有限公司
Priority date: 2011-05-18
Filing date: 2012-05-17
Publication date: 2012-11-22
Also published as: CN102310080B; CN102310080A

Abstract

A rolling mill comprises a first and second roll (30A, 40A) disposed on a first and second bearing chock assembly (30, 40) and an upright post (20) having one end connected to a rolling mill base (10) and the other end connected to an upper crossbeam (50). The upright post and/or the rolling mill base forms a limiting mechanism which limits the movement of the first bearing chock assembly in the upward and downward direction, along the roll axis, and along the direction in which the rolled material advances. A downward pressure oil cylinder (80) capable of pushing apart the upper crossbeam and the second bearing chock assembly is disposed therebetween. A spring (70) capable of pushing the first and second bearing chock assemblies is disposed between adjacent end faces of the two chock assemblies. The rolling mill is composed of separate parts, has a rigid frame, has securely positioned bearing chock assemblies, and is easy to assemble.

Description

Rolling mill

技术领域 Technical field

The invention relates to a rolling mill device, in particular to a frame structure of a rolling mill.

背景技术 Background technique

Prior art The processing of wire rods is mostly made by rolling mills. The rolling mill can be divided into a arch-type frame, a cantilever frame or a profile-welded frame-type frame according to its structure. The adjustment and control of the roll spacing directly leads to the size of the product to be rolled, and the product to be rolled The dimensional accuracy is dependent on the overall rigidity of the mill stand and rolls, the accuracy of the rolls and the material selection. At present, in the rolling mill of the arch-type frame and the cantilever frame, the vertical installation of the arch-type frame is taken as an example, and the deformation in the up-and-down direction is large and difficult to control because The bearing housings are fixed to the bottom support of the arch-type frame by bolts. The lower bearing seat is usually placed on the upper beam so that the arched frame is located at the bottom support and upper part during rolling. Between the beams The column is stretched and deformed by the tensile force throughout its length, and its deformation elongation is large; for the cantilever frame, the deformation of the column is basically similar. That is to say, the rigidity of the rolling mill frame is insufficient, and the deformation of other components is large, and the accumulated error is large, which is difficult to meet the rolling quarter requirement.

A patent document entitled 'Steel Rolling Mill with Supporting Roller Body with Hydraulic Lowering Device' (Publication No. CN101658862A), the rolling mill frame comprising a lateral frame 10 at the upper portion, a lower frame 12-1 at the lower portion, and The column 1 located between the two can be regarded as a arch-type frame, in which the column is elongated and deformed within the total length of the column during operation.

The patent document entitled 'Roller Combination Rack' (Publication No. CN2796875Y) has a frame comprising upper and

lower cross members

1, 4 and respective columns 2 connecting the two, and between the upper and

lower beams

1, 4 and the column 2 The rod 8 and the nut 9 are connected such that the column 2 is subjected to compressive stress, and the structure has a drawback in that the positioning between the upper and

lower beams

1, 4 and the column 2 in the direction perpendicular to the column 2 cannot satisfy the requirement because The pressure provided between the upper and

lower beams

1, 4 and the column 2, maintaining the position perpendicular to the column 2 depends on the friction between each other, which is extremely unreliable; in addition, due to the rod 8 and The structure of the connection of the nut 9 is itself limited, and the pre-tightening force provided is very limited. Once the external force during the rolling process cancels the pre-tightening force provided by the rod 8 and the nut 9, it may lead to the upper and lower beams 1 in severe cases. 4 and the column 2 are separated from each other, and the rolling precision can not be discussed.

The patent document entitled "The roll gap adjustment system of the frameless rolling stand" (Publication No. CN1108975A) comprises an upper left-handed threaded section 22a, an intermediate cylindrical section 22b and a lower right-handed threaded section 22c. The screw 12, the adjacent first and second bearing block assemblies are connected to each other by a pair of identically configured screws 12, and the cylindrical section 22b in the middle of the screw 12 is axially fixed relative to the frame member 28 and is journaled so as to be in the frame member. Rotating within 28, the frame member 28 itself is supported on the base 30, and the upper left-handed threaded section 22a and the lower right-handed threaded section 22c are respectively connected to the first and second bearing housing assemblies, in fact, the first and second bearing housing assemblies are simultaneously Approach or separate motion to achieve adjustment of the roll gap. The disadvantage of this solution is that when the screw 12 is subjected to the tensile force, the entire length of the rod is elongated and deformed, and the rigidity thereof is poor; the lower end of the screw 12 is drooping, and the second roller 14 on the second bearing housing assembly is subjected to the line during rolling. When the impact load of the bar travels, the lower end of the screw 12 is also bent and deformed, which causes the displacement of the first and second rolls to be displaced, which seriously affects the rolling precision.

Summary of the invention

SUMMARY OF THE INVENTION It is an object of the present invention to provide a rolling mill which is assembled by a separate component and which has a high rigidity and which is capable of reliably positioning the bearing housing assembly and facilitating assembly.

In order to achieve the above object, the present invention adopts the following technical solutions: The rolling mill comprises first and second rolls disposed on the first and second bearing block assemblies, one end of the column is connected to the rolling stand and the other end is connected to the upper beam, wherein the first bearing block assembly is composed of the column and / Or the rolling stand constitutes a limiting mechanism for restricting displacement of the first bearing block assembly in the up-and-down direction, moving along the roll axis or in the traveling direction of the rolled material; and the upper beam and the second bearing block assembly are arranged to push the two to separate The pressure cylinder, the first and second bearing block assemblies are adjacent to each other and a spring is provided between the opposite end faces to push the two to separate.

It can be known from the above technical solution that the position of the first bearing block assembly, that is, the bearing block assembly located at the lower part is fixed by the column, the rolling stand or independently or in cooperation, so that the vertical direction of the first bearing block assembly is reliably defined. After the displacement of the axial direction of the roll and the traveling direction of the rolled material is effectively restrained, the corresponding degree of freedom of the second bearing block assembly is constrained, so as to ensure the determination of the roll pitch and the axial position of the roll, The position between the first and second bearing block assemblies is determined as a prerequisite for ensuring the rolling accuracy; the present invention not only effectively fixes the positions of the first and second bearing block assemblies, but also facilitates the replacement of the rolls after the restraint is released.

附图说明 DRAWINGS

Figure 1 is a schematic view of the structure of the present invention;

Figure 2 is a schematic view showing the assembly of the first and second bearing housing assemblies;

Figure 3 is a plan view of Figure 2;

Figure 4 is a schematic view showing the state in which the column is rotated and expanded;

Figure 5 is a schematic structural view of a column;

Figure 6 is a left side view of Figure 5.

具体实施方式 detailed description

When processing the bar sheet, the rolling precision depends not only on the deformation resistance of the roll, that is, the rigidity, but also the rigidity of the frame of the rolling mill and the reliability of the fixed structure of the frame to the roll. The invention proposes a new and effective solution in the rigid structure of the frame and the fixed structure of the frame to the roll. The details are as follows.

As shown in Fig. 1, a rolling mill includes first and second rolls 30A disposed on the first and second bearing

housing assemblies

30, 40, 40A, one end of the column 20 is connected to the rolling stand 10, and the other end is connected to the upper beam 50, and the first bearing block assembly 30 is composed of the column 20 and/or the rolling stand 10 Forming a limiting mechanism that defines displacement of the first bearing block assembly 30 in the up and down direction, in the axial direction of the roll or in the direction of travel of the rolled material; the upper beam 50 and the second bearing block assembly 40 There is disposed a lower pressure cylinder 80 for pushing the two to separate, and the first and second bearing

housing assemblies

30, 40 are adjacent to each other and a spring 70 for pushing the separation therebetween is provided between the opposite end faces.

In the above solution, the first bearing block assembly 30 is realized by the column 20, the rolling mill stand 10 or independently or cooperatively. The corresponding degree of freedom constraints, such a direct through the column 20, the rolling mill stand 10 to the first bearing block assembly 30 solution has the advantages of simple structure, convenient and reliable positioning, and large binding force. Second housing assembly 40 It is placed between the lower cylinder 80 and the spring 70, so the constraint in the up and down direction is also simple and reliable, so that the positions of the first and

second rolls

30A, 40A are reliably determined.

The lower middle portion of the column 20 is provided with a step surface 21 facing downward, the step surface 21 and the rolling stand 10 Between the upper support surfaces, a limit mechanism for vertically displacing the first bearing block assembly 30 is formed; the upper portion of the column 20 is a cylindrical thread segment 22a, and the middle portion is a square column segment having a square cross section. 22b and the lower section 22c below the square column section 22b, the stepped surface 21 is formed at the junction of the square pillar section 22b and the lower section 22c, and the stepped surface 21 The surface of the panel is horizontally or obliquely downward. When assembled, the tensile column 20 stretches and deforms the length between the stepped surface 21 and the lower end thereof and the joint of the rolling mill stand 10, which is appropriately stretched and deformed. The lower column is in a stretched state and is pressed by the stepped surface 21 onto the bearing block assembly 30. The magnitude of the preload pressure is determined by the amount of tensile deformation of the column 20. Only when the housing assembly 30 The external impulse received is greater than the preload force provided by the tensile deformation of the column 20, and the beating of the bearing block assembly 30 occurs. The present invention provides a suitable preloading force on the bearing block assembly 30. At the same time, under the support of the rolling mill stand 10, the bearing block assembly 30 is reliably positioned and fixed.

Preferably, the face of the stepped surface 21 is horizontally downward so as to maximize the preloading pressure acting on the bearing block assembly 30, and the column The processing of 20 is also very convenient.

The lower section 22c below the stepped surface 21 of the column 20 has mutually parallel face faces 23, and the face 23 The lower section 22c is located in the groove body 11 of the upward direction of the rolling mill stand 10, and the spacing between the mutually parallel two faces 23 coincides with the groove width of the groove body 11, and the lower section 22c is perpendicular to the axial direction of the roll. An articulated shaft 60 is disposed between the lower end and the trough body 11, and the hinge shaft 60 is parallel to the axis of the roll.

The cavity area of the trough 11 should ensure that the end of the post 20 is inserted therein while providing the column 20 Turn the space required. The spacing between the two faces 23 coincides with the groove width of the groove 11 to define the displacement of the column 20 in the axial direction of the roll, which is the first and second bearing

block assemblies

30, 40. The positioning provides the basis for positioning.

The above structure can ensure the reliability and rigidity of the cooperation of the column 20 with the rolling stand 10, that is, the column 20 is opposed to the rolling stand 10 It is only possible to rotate with the shaft core of the hinge shaft 60, which is the fitting relationship when the roller is disassembled, and the degrees of freedom in other directions are limited, which is also due to the column 20 The positioning of the roll chocks can be reliably positioned after being effectively positioned.

A section of the column below the stepped surface 21 of the column 20 is located in a groove formed in the bearing block assembly 30. The two cooperate to form a stop mechanism that limits the movement of the first bearing block assembly 30 in the axial direction of the roll. As shown in Figs. 5 and 6, the step faces 21 are symmetrically arranged on the face of the face symmetry plane of the face faces 23 which are parallel to each other. 23 On both sides, the central symmetry plane of the face 23 is perpendicular to the axial direction of the roll. This ensures that the pressure acting at the port 31 is uniform and symmetrical, avoiding the column 20 Bending occurs due to bending moments.

The end face of the first bearing block assembly 30 has an inverted shape and is opposite to the rolling stand 10 The upper concave region constitutes a limiting mechanism that limits the movement of the first bearing block assembly in the direction of travel of the rolled material. This is through the first bearing block assembly 30 and the mill stand 10 The cooperation achieves positional positioning along the direction of travel of the rolled material.

The above structure is to realize the first bearing block assembly 30 The displacement of the upper and lower, left and right, and front and rear directions and the rotation of the corresponding direction realize the reliable positioning of the first bearing block assembly 30.

The upper section of the column 20 is provided with a cylindrical section 22d between the cylindrical thread section 22a and the square column section 22b, and the cylindrical section 22d is mated with the hole in the upper beam 50, and the square column section 22b is provided with a slope 24 at the upper end of the cylinder on the discharge side of the material, and the slope 23 is from the square section 22b to the cylindrical section 22d In the transition, the lower end surface of the upper beam 50 is provided with a slope matching the slope 24.

The stepped surface 21 of the column 20 and the mutually parallel face 23 have a cylindrical section 22e, and the face 23 Between the upper end and the cylindrical section 22e, a step surface 25 facing the lower side of the rolling mill is formed, and the step surface 25 is at an angle of 50 to 80 degrees with respect to the horizontal plane, preferably 60°. This angle ensures that the disassembly roll is accurate . The step surface 25 is provided for restricting the opening degree of the rotation and opening of the column 20, and in combination with Figs. 1 and 2, the column 20 at the same end of the roll is separately rotated to an appropriate position, and the step surface 25 In contact with the appropriate portion of the mill stand 10, the column 20 is supported at the opening position, at which point the column 20 will be separated from the roll chock assembly 30, and the roll disassembly process can be conveniently performed.

The step surface 25 faces the rolling mill in front of and behind the outer side of the workpiece to be rolled, and refers to the step surface 25 due to the column 20 The positions are different and different, that is, four columns 20 have two on the feed side of the rolls, and the other two columns 20 are located on the discharge side of the rolls; the step faces on the two columns 20 on the feed side of the rolls 25 Facing the front-down direction of the feed side of the roll, the step surface 25 on the two columns 20 on the discharge side of the roll faces the rear-down direction of the discharge side of the roll, as shown in Figs. The direction of the sword head is the direction of travel of the piece to be rolled.

The column legs 22b of the middle section of the column 20 are provided with rail grooves 26 arranged along the longitudinal direction of the column 20 on opposite cylinder faces. The second bearing block assembly 40 is located in the slot of the rail slot 26. The groove bottoms of the two rail slots 26 at the same end of the second housing assembly 40 form a pair of second housing assemblies 40 Along the limit in the direction of travel of the rolled material, the walls of the groove form a limit on the axial direction of the second chock assembly 40, thus achieving the second chock assembly 40 along the rail groove 26 The defined direction is the displacement in the longitudinal direction of the column.

The first and second

bearing block assemblies

30, 40 are adjacent to each other and the spring 70 disposed between the opposite end faces is a compression spring, and the upper beam 50 The lower pressure cylinder 80 that drives the two bearing housing assembly 40 is disposed, and the spring 70 cooperates with the lower pressure cylinder 80 to form the first and second

bearing housing assemblies

30, 40. Adjustment mechanism for the pitch.

Preferably, the spring 70 includes first and second disc springs 71, 72 disposed perpendicular to the adjacent end faces of the first and second

bearing block assemblies

30, 40. The two disc springs 71, 72 are of different stiffness and superposed. First and second disc springs 71, The elastic modulus of 72 is different in magnitude, and the spring 72 having a small elastic modulus is first contracted and deformed when subjected to the pressing force, and the two

springs

71 and 72 are contracted and deformed to the appropriate positions as the pressing cylinder 80 is pressed downward, so that the second bearing The seat assembly 40 is positioned by the upper lower cylinder and the lower spring 70, which provides a substantially rigid fixed and securely positioned second housing assembly 40, ensuring the first and

second housing assemblies

30, 40. The spacing is constant so that the rolling accuracy can be ensured.

Claims

A rolling mill comprising first and second rolls (30A) and (40A) disposed on first and second bearing block assemblies (30), (40), one end of which is connected to a rolling stand (10) The other end is connected to the upper beam (50), characterized in that the first bearing block assembly (30) is constituted by the upright column (20) and/or the rolling mill stand (10) to define the displacement of the first bearing block assembly (30) in the up and down direction. a limiting mechanism that moves along the axial direction of the roll or in the direction of travel of the rolled material; a lower pressure cylinder (80) that pushes the separation between the upper beam (50) and the second bearing block assembly (40), The first and second bearing block assemblies (30), (40) are disposed adjacent to each other and between the opposite end faces are provided with springs (70) that push the two apart.
The rolling mill according to claim 1, characterized in that the lower middle portion of the upright (20) is provided with a stepped surface (21) with the plate facing downward, the stepped surface (21) and the upward support surface of the rolling stand (10) A limiting mechanism for vertically displacing the pressure pretensioning position of the first bearing block assembly (30) is formed; the upper section of the column (20) is a cylindrical thread section (22a), and the middle section is a square section. The column section (22b) and the lower section (22c) below the square pillar section (22b), the square pillar section (22b) and the lower section (22c) form a stepped surface (21), and the plane of the stepped surface (21) is horizontal or oblique under.
The rolling mill according to claim 1 or 2, characterized in that the lower section (22c) below the stepped surface (21) of the upright (20) has mutually parallel face faces (23), the face (23) and The axial direction of the roll is perpendicular, and the lower section (22c) is located in the groove body (11) of the rolling mill stand (10), and the spacing between the two parallel faces (23) and the groove body (11) The groove width is matched, and an articulated shaft (60) is disposed between the lower end of the lower section (22c) and the groove body (11), and the hinge shaft (60) is parallel to the axis of the roll.
The rolling mill according to claim 1 or 2, characterized in that the stepped surface (21) of the column (20) has a section of a groove (31) which is formed on the first bearing block assembly (30). The two cooperate to form a limiting mechanism that limits the movement of the first bearing block assembly (30) in the axial direction of the roll.
The rolling mill according to claim 1 or 2, characterized in that the end face of the first bearing block assembly (30) has an inverted shape and is concave with the rolling mill stand (10). The area constitutes a limit mechanism that limits the movement of the first bearing block assembly in the direction of travel of the rolled material.
The rolling mill according to claim 1 or 2, characterized in that the upper section of the upright column (20) is provided with a cylindrical section (22d) between the cylindrical thread section (22a) and the square column section (22b), the cylinder The section (22d) is mated with the hole in the upper beam (50), and the upper end of the cylinder section (22b) on the material discharge side is provided with a slope (24), and the slope (23) is from the square section (22b) The transition to the cylindrical section (22d) is provided with a slope (51) matching the inclined surface (24) on the lower end surface of the upper beam (50).
The rolling mill according to claim 1 or 2, characterized in that the stepped surface (21) of the upright (20) and the mutually parallel face (23) have a cylindrical section (22e), the rod A stepped surface (25) facing the lower side of the rolling mill is formed between the upper end of the face (23) and the cylindrical section (22e), and the stepped surface (25) is at an angle of 50 to 80 degrees with respect to the horizontal plane, preferably 60°.
The rolling mill according to claim 2, characterized in that the cylindrical section (22b) of the middle section of the column (20) is provided with a rail groove (26) arranged along the longitudinal direction of the column (20). The second bearing block assembly (40) is located in the slot of the rail slot (26).
A rolling mill according to claim 1 or 2 or 8, wherein said first and second bearing block assemblies (30), (40) are adjacent to each other and a spring (70) disposed between opposite end faces is a compression spring, the upper beam (50) is provided with a lower pressure cylinder (80) for driving the movement of the two bearing block assembly (40), and the spring (70) and the lower pressure cylinder (80) cooperate to form the first and second Adjustment mechanism for the bearing housing assembly (30), (40).
A rolling mill according to claim 9, wherein said spring (70) comprises first and second disc springs (71) arranged perpendicular to the adjacent end faces of the first and second bearing block assemblies (30), (40). ), (72), the two disc springs (71), (72) have different stiffness and are placed in superposition.