CN210059329U

CN210059329U - Dragon-shaped rolling mill

Info

Publication number: CN210059329U
Application number: CN201920159476.8U
Authority: CN
Inventors: 张新明; 黄亮; 刘建华
Original assignee: Hengyang Xincheng Heavy Machinery Equipment Manufacturing Co Ltd
Current assignee: Hengyang Xincheng Heavy Machinery Equipment Manufacturing Co Ltd
Priority date: 2019-01-30
Filing date: 2019-01-30
Publication date: 2020-02-14
Anticipated expiration: 2029-01-30

Abstract

The utility model discloses a dragon shape rolling mill, it includes frame, top roll and bottom roll, the top roll both ends are installed in the frame through bolster bearing housing, the bottom roll both ends are installed in the frame through the bottom bearing housing, and its below that is located the top roll is separated from the top roll by the clearance, the clearance is configured into and is passed through as the work piece makes during the clearance the work piece warp, and the relative work piece direction of advance of axis of top roll and bottom roll is at a distance of deviant S. The utility model discloses an have and to make the rolled piece fully to warp can guarantee again that the rolled piece does not upwarp or lower couch, make the surface of rolled piece and the relevant advantage that is no longer than 10% of the physical mechanical properties of core simultaneously.

Description

Dragon-shaped rolling mill

Technical Field

The utility model relates to a metal rolling field, it especially relates to a dragon shape rolling mill.

Background

The high-performance aluminum alloy is widely applied to various fields of modern aerospace, ships and warships, rail transit and the like. At present, domestic aluminum alloy rolling equipment mainly rolls at the same speed and symmetrically, and in the process of rolling an aluminum alloy thick plate, particularly when the thickness of the aluminum alloy thick plate exceeds 50mm, a deformation area of a rolled piece only can form a front sliding area and a rear sliding area, and the rolled piece only bears the action of pressure stress. Deformation cannot permeate into the plate core, so that the plate core and the edge are deformed unevenly, the plate is deformed unevenly, microstructure and mechanical property of the aluminum alloy plate are uneven, and corrosion resistance of the aluminum alloy plate is seriously affected.

The asynchronous symmetrical rolling is an advanced strong plastic deformation process, has many advantages compared with a synchronous rolling mill, and has the main rolling modes of same-diameter different-speed asynchronous rolling (the diameters of upper and lower rollers are the same and the rotating speed is different) and different-diameter same-speed asynchronous rolling (the diameters of upper and lower rollers are different and the rotating speed is the same). In the asynchronous rolling process, severe additional shear deformation is generated inside the rolled piece due to the fact that the upper roller and the lower roller are asymmetric to the deformation of the rolled piece, and therefore the uniformity of the deformation of the rolled piece in the thickness direction is improved.

Disclosure of Invention

The object of the utility model is to overcome the above-mentioned not enough of prior art and provide a make the physical mechanical properties on rolled piece surface and the physical mechanical properties of core be relevant and be not more than 10%, solve the dragon shape rolling mill of the phenomenon that the rolled piece upwarps or descends in rolling process simultaneously.

The technical scheme of the utility model is that: a dragon-shaped rolling mill comprises a frame, an upper roller and a lower roller, wherein two ends of the upper roller are installed in the frame through upper bearing blocks, the lower roller is installed in the frame through lower bearing blocks, the lower roller is located below the upper roller and separated from the upper roller by a gap, the gap is configured to deform a workpiece when the workpiece passes through the gap, and the axes of the upper roller and the lower roller are separated from the advancing direction of the workpiece by an offset value S.

The utility model discloses further technical scheme is: the upper roller is separated from the lower roller by an offset value S in the direction of the workpiece outlet.

The utility model discloses further technical scheme is: and adjustable cushion blocks are arranged on two sides of the lower bearing seat and the rack, and the adjustable cushion blocks are adjusted to obtain a proper deviation value S.

The utility model discloses further technical scheme is: the adjustable cushion block comprises a wedge-shaped first cushion block, a wedge-shaped second cushion block, a wedge-shaped third cushion block and a wedge-shaped fourth cushion block, the wedge-shaped first cushion block and the wedge-shaped second cushion block are matched and located on one side of the lower bearing block, and the wedge-shaped third cushion block and the wedge-shaped fourth cushion block are matched and located on the other side of the lower bearing block.

The utility model discloses further technical scheme is: the upper roller is connected with a cross beam of the frame through a lifting device.

The utility model discloses further technical scheme is: the lifting device is a screw rod capable of being pressed downwards, one end of the lifting screw rod is connected with the upper end face of the upper roller, and the other end of the lifting screw rod is connected with a cross beam of the rack through a nut.

The utility model discloses further technical scheme is: and the lower end surface of the lower bearing seat is connected with a pressing fine adjustment device with the rack.

The utility model discloses further technical scheme is: the ratio of the upper roller speed to the lower roller speed is 100%: 1-180%: 1.

the utility model discloses further technical scheme is: the deviant S is less than or equal to 25 mm.

Compared with the prior art, the utility model has the following characteristics:

1. compared with the existing rolling mill, the rolling piece can form a front sliding area, a rolling area and a rear sliding area in the deformation area. In the rolling area, the rolled piece bears the vertical compression force and also bears the horizontal shear stress, so that the rolled piece generates shear strain while generating compression, the shear deformation is beneficial to grain refinement, the tissue uniformity and mechanical and physical properties of the rolled piece are improved, and particularly, the aluminum alloy material can ensure that the surface physical and mechanical properties of the aluminum alloy plate are not more than 10 percent relative to the core part and far more than the existing 20 percent.

2. The invention can fully deform, ensure that rolled pieces do not upwarp or descend, and can obtain good rolling plate shape control.

3. The upper and lower rollers of the invention can be adjusted speed respectively, and can obtain larger differential speed ratio.

4. The invention adjusts the offset value S to adapt to the thickness, the rolling reduction and the speed ratio of the upper roller and the lower roller of different plates by adjusting the relative position of the adjustable cushion block.

The detailed structure of the present invention will be further described with reference to the accompanying drawings and the detailed description.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a sectional view a-a of fig. 1.

Detailed Description

Example 1

When an aluminum alloy plate is rolled, particularly when a thick plate with the thickness of more than 50mm is rolled, the edge part and the core part of the aluminum alloy plate are subjected to uneven rolling force in the traditional symmetrical rolling process, the rolling force direction is vertical, so that the deformation of the core part is small, the deformation of the edge part is large, and the difference of microstructures (particularly expressed in grains) of the edge part and the core part of the aluminum alloy plate is large, thereby affecting the mechanical property and the corrosion resistance of the material. In the same-diameter symmetrical different-speed rolling process, although the stress on the core part and the edge part of the rolled piece can be uniform, when the rolling speed of the upper surface and the lower surface of the aluminum alloy plate is different under high pressure and large deformation, the head part of the plate is tilted up or stood down, so that the head part of the plate is difficult to continuously bite in the subsequent rolling process. When the rolling is conducted in the different-diameter symmetrical mode, the rolling speed is different due to the fact that the diameters of the upper roller and the lower roller are different, and accordingly the rubbing rolling effect is achieved.

The embodiment discloses a dragon-shaped rolling mill, which means that the diameters of upper and lower rollers are the same, the rotating speeds of the upper and lower rollers are different, and the axes of the upper and lower rollers are not in the same vertical plane, but the upper roller with the smaller linear speed deviates a certain deviation value S towards the rolling outlet direction, namely the upper roller is asymmetrically rolled at different speeds in the same diameter. Therefore, the rolled piece can form a front sliding area, a rolling area and a rear sliding area in the deformation area. In the rolling area, the rolled piece bears the compressive force in the vertical direction and also bears the shear stress in the horizontal direction, so that the rolled piece generates the compression and simultaneously generates the shear strain. The shearing strain can generate shearing deformation, is beneficial to grain refinement of a rolled piece, and improves the tissue uniformity, the mechanical property and the physical property of the rolled piece, particularly the aluminum alloy material can enable the surface physical mechanical property and the core part of the aluminum alloy plate to be not more than 10% relative to the prior asynchronous symmetrical rolling, and the aluminum alloy plate rolled by adopting the dragon-shaped rolling mill is widely applied to the fields of aviation, aerospace, rail transit technology and the like.

As shown in fig. 1 and 2, a dragon-shaped rolling mill comprises a frame 1, an upper roll 3 and a lower roll 5, wherein both ends of the upper roll 3 are installed in the frame 1 through upper bearing blocks 2, that is, the upper roll 3 is installed in the frame 1 through the two upper bearing blocks 2; the lower roller 5 is arranged in the frame 1 through the lower bearing blocks 4, namely the lower roller 5 is arranged in the frame 1 through the two lower bearing blocks 4; the lower roll 5 is located below the upper roll 3 with a gap from the upper roll 3, the gap being configured to deform the workpiece when the workpiece passes through the gap, the axes of the upper roll 3 and the lower roll 4 being separated by an offset value S with respect to the workpiece advance direction.

In order to realize that the rolled piece can form a front sliding area, a rolling area and a rear sliding area in the deformation area, multiple tests show that the upper roller 3 is separated from the lower roller 5 by an offset value S towards the outlet direction of the workpiece, namely as shown in FIG. 1, the direction of V is the moving direction of the rolled piece, the upper roller 3 is positioned at the left side of the lower roller 4, and the central axis of the upper roller is separated from the offset value S in the horizontal direction. The size of the offset value S is related to the thickness of a rolled plate, the rolling reduction, the speed ratio of the upper roller to the lower roller and the diameter of the upper roller to the lower roller, and S is generally less than or equal to 25 mm.

In order to obtain the required offset value S, adjustable spacers 9 are mounted on two sides of the lower bearing seat 4 and the machine frame 1, as shown in fig. 2, each adjustable spacer 9 includes a wedge-shaped first spacer 91, a wedge-shaped second spacer 92, a wedge-shaped third spacer 93 and a wedge-shaped fourth spacer 94, the wedges of the first spacer 91 and the wedge-shaped second spacer 92 are matched and located on the left side of the lower bearing seat 4, and the wedges of the third spacer 93 and the wedge-shaped fourth spacer 94 are matched and located on the right side of the lower bearing seat 4. Due to the two pairs of wedge-shaped chocks which are matched with each other, adjustment is very convenient, and when the offset value S is increased, the second chock 92 is pushed upwards (seen from the direction shown in FIG. 2), and the third chock 93 is pushed downwards (seen from the direction shown in FIG. 2), so that the axis of the lower roll 5 is moved rightwards relative to the axis of the upper roll 3, and the offset value S is increased to a required value.

In order to adapt the gap between the upper roller 3 and the lower roller 5 to different plates and rolling reduction, a lifting device is arranged between the upper end surface of the upper roller 3 and a cross beam of the frame 1, preferably, the lifting device adopts a lifting screw 7, one end of the lifting screw 7 is connected with the upper end surface of the upper roller 3, the other end of the lifting screw 7 penetrates through a hole corresponding to the cross beam of the frame 1 and is connected with a nut, and the nut is rotated, so that the gap between the upper roller 3 and the lower roller 5 is adjusted.

In order to finely adjust the gap between the upper roll 3 and the lower roll 5, a screw-down fine adjustment device 8 is connected to the lower end surface of the lower chock 4 and the frame 1, and the gap between the upper roll 3 and the lower roll 5 can be adjusted by a small amount.

The practice proves that the ratio of the roller speed of the upper roller 3 to the roller speed of the lower roller 5 is 100%: 1-180%: 1, a good rolling effect can be obtained, namely the surface physical and mechanical properties of the aluminum alloy plate are not more than 10% related to the core part, and meanwhile, the aluminum alloy plate can be fully deformed, the rolled piece can be ensured not to be upwarped or laid down, and good rolling plate shape control can be obtained.

The above-mentioned embodiment is the utility model discloses the implementation scheme of preferred, in addition, the utility model discloses can also realize by other modes, any obvious replacement is all within the protection scope of the utility model under the prerequisite that does not deviate from this technical scheme design.

Claims

1. A dragon-shaped rolling mill is characterized in that: the rolling mill comprises a rack (1), an upper roller (3) and a lower roller (5), wherein two ends of the upper roller (3) are installed in the rack (1) through an upper bearing seat (2), two ends of the lower roller (5) are installed in the rack (1) through a lower bearing seat (4), the lower end of the lower roller (5) is located below the upper roller (3) and is separated from the upper roller (3) by a gap, the gap is configured to deform a workpiece when the workpiece passes through the gap, and the axial lines of the upper roller (3) and the lower roller (5) are separated by an offset value S relative to the advancing direction of the workpiece.

2. A dragon mill as claimed in claim 1 wherein: the upper roller (3) is opposite to the lower roller (5) and is away from the workpiece outlet by an offset value S.

3. A dragon mill according to claim 1 or 2, wherein: and adjustable cushion blocks (9) are arranged on two sides of the lower bearing seat (4) and the rack (1), and a proper deviation value S can be obtained by adjusting the adjustable cushion blocks (9).

4. A dragon mill as claimed in claim 3 wherein: the adjustable cushion block (9) comprises a wedge-shaped first cushion block (91), a wedge-shaped second cushion block (92), a wedge-shaped third cushion block (93) and a wedge-shaped fourth cushion block (94), the wedge-shaped first cushion block (91) and the wedge-shaped second cushion block (92) are matched and located on one side of the lower bearing block (4), and the wedge-shaped third cushion block (93) and the wedge-shaped fourth cushion block (94) are matched and located on the other side of the lower bearing block (4).

5. A dragon mill according to claim 1 or 2, wherein: the upper roller (3) is connected with a beam of the frame (1) through a lifting device.

6. A dragon mill as claimed in claim 5 wherein: the lifting device is a screw (7) which is pressed down, one end of the screw (7) is connected with the upper end face of the upper roller (3), and the other end of the screw is connected with a cross beam of the frame (1) through a nut.

7. A dragon mill according to claim 1 or 2, wherein: the lower end face of the lower bearing seat (4) is connected with a pressing fine adjustment device (8) with the rack (1).

8. A dragon mill according to claim 1 or 2, wherein: the ratio of the roll speed of the upper roll (3) to the roll speed of the lower roll (5) is 100%: 1-180%: 1.

9. a dragon mill according to claim 1 or 2, wherein: the deviant S is less than or equal to 25 mm.

10. A dragon mill as claimed in claim 9 wherein: the ratio of the roll speed of the upper roll (3) to the roll speed of the lower roll (5) is 100%: 1-180%: 1.