WO2006086919A1

WO2006086919A1 - A combined mill housing

Info

Publication number: WO2006086919A1
Application number: PCT/CN2005/002243
Authority: WO
Inventors: Hongzhuan Zheng; Linzhen Zhao
Original assignee: Hongzhuan Zheng; Linzhen Zhao
Priority date: 2005-02-21
Filing date: 2005-12-19
Publication date: 2006-08-24
Also published as: CN1824400A

Abstract

A combined mill housing includes upper and lower beams and columns, wherein the upper and lower beams and columns are independent members from each other and upper and lower beams and columns are connected by a connecting device so as to form a combined housing. According to the combined mill housing of the invention, the upper and lower beams and columns are independent members from each other and upper and lower beams and columns are assembled by a connecting device into a combined housing, so that manufacturing, transporting and installing in situ of the housing are faciliated, thereby reducing the cost of processing, manufacturing, transporting and installtion of the housing. According to the combined mill housing of the invention, Since the pressing stress to which the columns are subjected can be adjusted during the assembling progress, the overall rigidity of the housing may be increased. According to another aspect of the invention, the combined housing are provided with moment banlancing devices, which apply moments to side walls of the beams in directions which are contrary to those of moments to which corresponding side walls are subjected during the operation of the mill.

Description

Rolling mill combined frame TECHNICAL FIELD

The invention relates to a rolling mill apparatus, in particular to a rolling mill combined frame. Background technique

At present, the conventional rolling mill, especially the frame of the strip mill, is generally of a monolithic structure, which is bulky and heavy, and requires a large amount of molten steel and large-scale machine tools to be processed at the time of processing, which is difficult to process and difficult to transport the finished product. Technical solution

The object of the present invention is to provide a rolling mill combination frame which is simple in structure and convenient in processing and manufacturing. The rolling mill combination frame is equipped with a torque balancing device that applies a moment to the side wall of the beam opposite to the torque experienced by the respective side wall during operation of the rolling mill in order to improve the stress condition of the beam, thereby protecting the beam of the frame, in particular diagonally unit.

In order to achieve the above object, the present invention provides a rolling mill combined frame comprising an upper beam and a lower beam and respective columns connecting the upper and lower beams, wherein the upper and lower beams and the columns are independent components, and the The upper and lower beams and the columns are connected to each other by a connecting device to form a combined frame, and the rolling mill assembly frame further comprises a torque balancing device, and the torque balancing device is applied to the side wall of the beam in the assembled state of the rolling mill combined frame. A balancing torque that is opposite to the torque experienced by the respective side wall during operation of the rolling mill.

Preferably, each of the columns receives a predetermined compressive stress in a connected state.

Preferably, the connecting device comprises a rod and a nut, and the upper and lower beams and the respective columns are respectively formed with holes that are axially centered along the yoke. In the assembled state, the rod extends through the holes in each pair. The nut is fitted at both ends of the rod.

Preferably, the connecting device comprises a rod, a liquid cylinder and a nut, and the upper and lower beams and the columns are respectively formed with holes axially centered along the rod, and in the assembled state, the rod extends through each pair a hole, the nut is fitted at one of the two ends of the rod, and the liquid cylinder is disposed at the other end of the rod, the other end of the rod is provided with a piston, and the piston is installed in the liquid In the cylinder of the cylinder.

Preferably, the connecting device comprises a weir and a liquid cylinder, the upper and lower beams and the columns Formed with axially centered holes along the rod, respectively, in the assembled state, the rod extends through the holes in each pair, the liquid cylinders being disposed at each end of the rod, each end of the rod A piston is disposed, and the piston is installed in a cylinder of the corresponding liquid cylinder.

Preferably, the connecting device comprises a rod and a hydraulic lock nut, and the upper and lower beams and the columns are respectively formed with holes axially centered along the rod, and in the assembled state, the rod extends through each pair The holes, and the hydraulic lock nuts are fitted at the ends of the rod.

Preferably, four columns are included, and the four columns are respectively disposed at respective corners.

Preferably, two plate-shaped columns are included, and the two plate-column columns are oppositely disposed.

The torque balance device of the rolling mill combination frame comprises a pull rod, the longitudinal axis of the pull rod is located outside the corner portion along the transverse direction of the cross beam, and the pull rod is connected between the upper and lower beams and is subjected to a predetermined condition in the assembled state of the combined frame. Pulling stress.

The torque balance device of the rolling mill combination frame further includes a nut, and the upper and lower beams are respectively formed with axially centered holes along the tie rods. In the assembled state, the pull rods extend through the holes in the pair, and the nuts Fitted at both ends of the tie rod.

The mill combination frame includes four moment balancing devices, which are respectively disposed at the four corners of the beam.

The torque balancing device of the rolling mill combination frame is disposed laterally of the corresponding column along the transverse direction of the beam. According to the rolling mill combination frame of the invention, the upper and lower beams and the columns are independent components, and the upper and lower beams and the columns are assembled into a combined frame by the connecting device, so that the traditional integral frame can be divided into several independent parts for processing. , which facilitates manufacturing, transportation, and field installation, reducing the cost of processing, manufacturing, shipping, and installation of the rack. Further, with the rolling mill combination frame of the present invention, since the compressive stress applied to the column can be adjusted during the assembly process, the overall rigidity of the frame can be improved.

In addition, by providing a torque balancing device, the stress condition of the beam is improved, thereby increasing the service life of the rolling mill combination frame. BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments, wherein

Figure 1 is a front elevational view showing an embodiment of a pre-stressed combined frame of a rolling mill of the present invention;

Figure 1 is a partially cutaway left side elevational view of the rolling mill prestressed combination frame of Figure 1;

Figure 3 is a partial cross-sectional view showing another embodiment for effecting the connection of the beam to the column; Figure 4 is a partially cutaway front elevational view of another embodiment of the rolling mill combination frame of the present invention;

Figure 5 is a left side elevational view of the mill combination frame of Figure 4. Detailed description of the preferred embodiment

Figures 1-2 illustrate an embodiment of a rolling mill pre-stressed combination frame in accordance with the present invention.

As shown in Fig. 1-2, the rolling mill prestressing combined frame of the present invention comprises an upper beam 1 and a lower beam 4, and a plurality of columns 2 disposed between the upper and lower beams, and the upper and lower beams and the columns are connected by appropriate connecting means. connection. In the embodiment shown in Figures 1-2, the combined frame includes four quadrants that are symmetrically disposed at the four corners.

Figure 1 illustrates an embodiment of achieving a beam to column connection. As shown in Fig. 2, the upper beam is formed with a flange 15 at its lower end (for convenience of description, the X direction in Fig. 1 is referred to as a lateral direction, and the Y direction in Fig. 2 is referred to as a longitudinal direction), and the flanges 15 are respectively formed. There is a through hole 5; and the lower cross member is also formed with a flange 16 at its upper end, and each of the flanges 16 is formed with a through hole 6; in addition, each of the uprights is also formed with an axial through hole 7. The upper and lower beams and the columns are connected by means of a rod 8, and the rods 8 are respectively formed with external threads at their axial ends.

In the assembly process of the combined frame, the through holes 5, 6 on the upper and lower beams and the through holes 7 in the uprights are first axially aligned, then the rod 8 is inserted therein, and finally the external thread is screwed onto the end of the rod 8. The upper nut 9 connects the components. By adjusting the tightening force of the nut 9, the degree of compression of each column can be adjusted, so that the column generates a predetermined compressive stress, so that the overall rigidity of the combined frame can be improved.

In the above-mentioned embodiment, a column is connected at each corner of the upper and lower beams, but it is obvious to those skilled in the art that each of the corners of the upper and lower beams can be connected by a plurality of columns according to actual needs.

Further, in the above embodiment, the column is in the form of a rod, but it should be noted here that the column is not limited to the rod form, but other types of columns may be employed. For example, the two columns on the left side and the two columns on the right side in Figure 1 can be a unitary structure, that is, two left columns form a monolithic column column, and the two right columns form a monolithic column column. . In the case of a plate-column column, the two plate-column columns are disposed opposite each other, and the upper and lower beams and the column-column columns are connected by a rod 8 and a nut to constitute a frame.

Figure 3 illustrates another embodiment of achieving a beam to column connection. The connection shown in Fig. 3 differs from the connection shown in Fig. 2 in that the nut located above is replaced by a liquid cylinder 10. As shown in Figure 3, The liquid cylinder 10 is disposed at a corner of the upper cross member and includes a cylinder 11 and a piston 12 disposed at the upper end of the rod 8 in the cylinder. An orifice 13 is formed in the wall of the cylinder below the piston. In the assembly of the combined frame, the components are joined together by injecting a predetermined pressure of pressure fluid into the cylinder through the orifice 13 to push the pistons together, and the compressive stress generated in the column can be adjusted by adjusting the fluid pressure. .

Further, as a modified embodiment in which the beam is connected to the column, the nut in the embodiment shown in Fig. 1 can be replaced with a hydraulic lock nut.

By adopting the rolling mill pre-stress combination frame of the invention, the upper and lower beams and the columns can be first processed and manufactured as independent components, and then the upper and lower beams and the columns are connected to each other by bolts or liquid cylinders and rods in the assembly workshop or the installation site. It forms a combined frame, and the prestressing force of the column can be adjusted according to actual needs. After the rack is assembled, the rolling mill components such as the work rolls and the support rolls are mounted in the upper and lower beams and the installation space defined by the columns to assemble the rolling mill.

Figures 4 and 5 illustrate another embodiment of the mill combination frame of the present invention.

It is well known that during the rolling process, the inner surface 22 of the upper and lower beam side walls 20 will withstand the force transmitted by the rolls F _{l 5} which is relative to the top or bottom wall inner surface 23 of the beam and the side wall inner surface 22 The corner C produces a moment M _l which acts on the side wall of the beam. Since stress concentration is likely to occur at the corners, if the rolling force is large, a large torque generated is likely to cause breakage of the beam.

In order to improve the stress condition of the beam, according to the second embodiment of the present invention, a torque balancing device 21 is added to the embodiment shown in Fig. 1. As shown in Figures 4 and 5, a through hole 25 for fitting the moment balancing device 21 is additionally formed on the flange 35 formed at the lower end of each side wall of the upper beam; and a flange 36 formed at the upper end of each side wall of the lower beam A through hole 26 for fitting the moment balancing device 21 is additionally formed. The moment balancing device includes a pull rod 28 which is internally threaded at its axial ends.

After the upper and lower beams and the posts are connected to each other by the connecting means formed by the rod 8 and the nut 9, the tie rods 28 are inserted into the through-holes 25 and 26 formed on the flanges of the upper and lower beams and axially aligned with each other. The torque balancing device is then mounted to the combination frame by a nut 29 that is screwed onto the external thread of the end of the tie rod 28. By adjusting the tightening force of the nut 29, the degree of tension of each of the tie rods can be adjusted, so that an appropriately sized tensile force F _{2 is} applied to the flanges 35 and 36 of the upper and lower beam side walls. The force F ₂ with respect to the corner portion of the cross member produces a moment M _2, the torque acts on the side wall of the cross member On. The moments M _{2 are} opposite to the above-mentioned moments, cancel each other out, thus improving the stress condition of the beam.

In the above-described embodiment, the moment balancing device is disposed adjacent to the corresponding column 2' and located outside the corresponding column 2 in the lateral direction of the beam, but this is not necessary for the purpose of the invention, and it may be disposed adjacent to the corresponding column. And located in the longitudinal direction of the beam on the outer side of the corresponding column 2, and the moment balance device may be disposed on the inner side of the corresponding column 2 along the transverse or longitudinal direction of the beam, as long as it can be opposite to the inner wall and the side wall of the top or bottom wall of the beam The corners between the surfaces may have a moment acting on the respective side walls opposite to the direction of the moment.

In the above embodiment, the moment balancing device is disposed between the upper and lower beams, but the moment balancing device may also be disposed between the two opposite side walls of the upper or lower beam. Thus, the torque balancing apparatus of the present invention is not limited to the particular forms herein described and illustrated, any device capable of balancing the torque with respect to angle section beam generating the torque M ₂ both may be employed.

Further, similar to the nut 9 of the first embodiment, the nut 29 of the moment balancer can also be replaced with the cylinder 1 G and the hydraulic lock nut.

The invention has been described with reference to the drawings and embodiments, and it is understood that various modifications of the invention may be made without departing from the spirit and scope of the invention.

Claims

Rights request

A rolling mill combined frame comprising an upper beam (1) and a lower beam (4) and respective columns (2) connecting the upper and lower beams, wherein the upper and lower beams and the columns are independent of each other And the upper and lower beams and the columns are connected to each other by a connecting device to form a combined frame, and the rolling mill assembly frame further comprises a torque balancing device, which is balanced in the assembled state of the rolling mill combined frame. The device applies a balancing moment to the side wall of the beam that is opposite to the torque experienced by the respective side wall during operation of the rolling mill.

2. The rolling mill combination frame according to claim 1, wherein: each of the columns receives a predetermined compressive stress in a connected state.

3. The rolling mill combination frame according to claim 1, wherein: the connecting device comprises a rod (8) and a nut (9), and the upper and lower beams and the respective columns are respectively formed with axial pairs along the rod The holes in the assembly state, the rafts extend through the holes in each pair, and the nuts are fitted at the ends of the rod.

4. The rolling mill combination frame according to claim 1, wherein: the connecting device comprises a rod (8), a liquid cylinder (10) and a nut (9), and the upper and lower beams and the columns are respectively formed with Along the axially centered bore of the bore, in the assembled state, the rod extends through the bore of each pair, the nut is fitted at one of the ends of the bore, and the cylinder is disposed on the stem At the other end of the two ends, the other end of the rod is provided with a piston, and the piston is installed in the cylinder of the liquid cylinder.

5. The rolling mill combination frame according to claim 1, wherein: the connecting device comprises a rod (8) and a liquid cylinder (10), and the upper and lower beams and the respective columns are respectively formed with an axial direction along the rod a centering hole, in an assembled state, the rod extends through a hole in each pair, the liquid cylinder is disposed at each end of the rod, and each end of the rod is provided with a piston, the piston Installed in the cylinder of the corresponding cylinder.

6. The rolling mill combination frame according to claim 1, wherein: the connecting device comprises a rod (8) and a hydraulic lock nut, and the upper and lower beams and the respective columns are respectively formed with axial pairs along the rod The hole in the assembly, in the assembled state, the rod extends through the hole in each pair, and the hydraulic lock nut is fitted at both ends of the rod.

The rolling mill combination frame according to any one of claims 1 to 6, characterized in that it comprises four uprights, which are respectively arranged at four corners of the beam.

The rolling mill combination frame according to any one of claims 1 to 6, characterized in that: The utility model comprises two plate-shaped columns, and the two plate column-shaped columns are oppositely arranged.

9. The rolling mill combination frame according to claim 1, wherein the moment balancing device comprises a pull rod, a longitudinal axis of the pull rod is located outside the corner portion along a transverse direction of the beam, and the pull rod is connected to the upper and lower beams. A predetermined tensile stress is applied between and in the assembled state of the combined frame.

10. The rolling mill combination frame according to claim 9, wherein: the moment balancing device further comprises a nut, and the upper and lower beams are respectively formed with holes axially centered along the tie rod, in an assembled state The pull rod extends through the holes in each pair, and the nut is fitted at both ends of the pull rod.

11. The rolling mill combination frame according to claim 9, wherein: the moment balancing device further comprises a liquid cylinder and a nut, wherein the upper and lower beams are respectively formed with holes axially centered along the tie rod, and assembled In the state, the pull rod extends through the hole in each pair, the nut is fitted at one of the two ends of the pull rod, and the liquid cylinder is disposed at the other end of the pull rod, the other end of the pull rod A piston is disposed, and the piston is installed in a cylinder of the liquid cylinder.

12. The rolling mill combination frame according to claim 9, wherein: the moment balancing device further comprises a rod liquid cylinder, wherein the upper and lower beams are respectively formed with holes axially centered along the rod, in an assembled state Next, the pull rod extends through the holes in each pair, the liquid cylinder is disposed at each end of the two ends of the pull rod, each end of the pull rod is provided with a piston, and the piston is installed in the cylinder of the corresponding liquid cylinder In the body.

13. The rolling mill combination frame according to claim 9, wherein: the moment balancing device further comprises a hydraulic lock nut, wherein the upper and lower beams are respectively formed with holes axially centered along the rod, and assembled In the state, the pull rod extends through the holes in each pair, and the hydraulic lock nut is fitted at both ends of the pull rod.

14. A rolling mill combination frame according to any one of claims 1 - 13, characterized in that it comprises four moment balancing devices, said four moment balancing devices being respectively arranged at the four corners of the beam.

The rolling mill combination frame according to any one of claims 1 to 13, characterized in that: the moment balancing device is disposed laterally of the corresponding column on the lateral direction of the corresponding column.