CN210497662U - Supporting structure of rough rolling lower roll bearing box - Google Patents
Supporting structure of rough rolling lower roll bearing box Download PDFInfo
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- CN210497662U CN210497662U CN201921183783.6U CN201921183783U CN210497662U CN 210497662 U CN210497662 U CN 210497662U CN 201921183783 U CN201921183783 U CN 201921183783U CN 210497662 U CN210497662 U CN 210497662U
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Abstract
The utility model provides a roll bearing box bearing structure under rough rolling, includes that the cylinder of installation at roll bearing box bottom portion under fills up, still includes concave arc pad and adjusting shim, and adjusting shim and concave arc pad are located the rectangular channel of roll change slide body, and concave arc pad bottom is the plane, and concave arc pad upper portion is equipped with the arc wall of laminating with the cylinder matching of the evagination of cylinder pad, and concave arc pad bottom touches presses adjusting shim, and concave arc pad and cylinder pad elastic connection. The rolling force can be uniformly distributed, so that the lower roll bearing box and the gasket are in surface contact instead of line contact, the stress tends to be balanced and reasonable, the phenomenon of local abrasion and deformation of the lower roll bearing box under the action of the super-strong rolling force is effectively eliminated, and the adverse effect of pressure concentration on a pressure head and a rolling mill base surface caused by line contact is eliminated.
Description
Technical Field
The utility model relates to a rolling mill part, especially work roll bearing box bearing structure under rough rolling.
Background
A two-high rolling mill is commonly used in hot continuous roughing mill trains. The two-roll mill mainly comprises an upper roll, a lower roll and a bearing box for supporting the upper roll and the lower roll. During steel rolling, the upper and lower rollers directly transmit rolling force to the bearing box, and the lower roller bearing box transmits the force to the rolling stand through the roller changing sliding seat assembly and the pressure head assembly. The lower roll bearing box is installed on the roll changing slide carriage assembly, the roll changing slide carriage assembly comprises a roll changing slide carriage body and a base plate, the base plate is located in two rectangular grooves of the roll changing slide carriage body, and the base plate is a supporting piece in direct contact with the lower roll bearing box. The lower part of the roll changing slide carriage body is provided with a pressure head assembly of the rolling stand. When the rolling mill works, rolling force acts on the middle part of the rolling mill, the roller body of the lower roller bends downwards, the bearing box of the lower roller is inclined towards the inner side of the rolling mill, the bottom surface of the bearing box of the lower roller forms a certain angle with the roller changing sliding seat, and a contact stress point between the bottom surface of the bearing box and the upper surface of the roller changing sliding seat shifts towards the inner side of the rolling mill, as shown in fig. 13. The rolling force display is inaccurate, the pressure head assembly is easy to damage, the rolling is unstable and other adverse phenomena occur. In order to avoid the phenomenon, a cylindrical pad is arranged on the bottom surface of the lower roller bearing box, so that the contact stress point of the bearing box and the roller changing sliding seat is not changed. However, the contact surface between the bottom surface of the bearing housing and the shim plate is in line contact, which has the following problems: 1. due to strong rolling force, the abrasion of the bottom surface of the box body, which is contacted with the cylindrical pad, of the lower roller bearing box is abnormal, so that a pit is ground on the contact surface, the volume and the weight of the bearing box are large, the bearing box is generally made of steel casting, the hardness of the bearing box body is difficult to improve, and the repair is difficult to implement after the pit is ground on the bottom surface of the bearing box; 2. pressure concentration caused by line contact can be diffused to a pressure head assembly and a base surface of a rolling mill frame, a pit is gradually ground under long-term high-pressure impact, and the base surface of the rolling mill is more difficult to repair; 3. the pressure head is fragile, and the pressure head is the key part that detects the rolling force size, plays crucial effect to the plate type control, and wearing and tearing appear in the pressure head, make rolling force data display inaccurate gradually, and the board type is difficult to control.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a thereby can eliminate the rough rolling lower roll bearing box bearing structure of line contact drawback with rolling force evenly distributed to the drawback of prior art.
The problem of the utility model is realized with following technical scheme:
the utility model provides a roll bearing box bearing structure under rough rolling, includes that the cylinder of installation at roll bearing box bottom portion under fills up, still includes concave arc pad and adjusting shim, and adjusting shim and concave arc pad are located the rectangular channel of roll change slide body, and concave arc pad bottom is the plane, and concave arc pad upper portion is equipped with the arc wall of laminating with the cylinder matching of the evagination of cylinder pad, and concave arc pad bottom touches presses adjusting shim, and concave arc pad and cylinder pad elastic connection.
According to the supporting structure of the rough rolling lower roll bearing box, the front end face and the rear end face of the cylindrical pad are respectively provided with the blind holes, the axes of the blind holes are perpendicular to the front end face and the rear end face of the cylindrical pad, the lower portions of the blind holes are provided with the bolt holes, the axes of the bolt holes are orthogonal to the blind holes, the cylindrical nuts are mounted in the blind holes, the outlines of the cylindrical nuts are cylindrical, threaded holes are formed in the middle of the cylindrical nuts, the axes of the threaded holes are orthogonal to the axes of the cylindrical nuts, stepped bolt holes are formed in the concave arc pads, the connecting screw penetrates through the stepped bolt holes of the concave arc pads, the upper ends of the connecting screw are screwed with the threaded holes of the cylindrical nuts, the lower ends.
According to the supporting structure of the rough rolling lower roll bearing box, the oil groove is formed in the arc-shaped concave surface of the concave arc pad and distributed along the axis of the arc-shaped concave surface, the concave arc pad is further provided with the horizontal oil duct and the vertical oil duct, the horizontal oil duct extends from the side wall of the concave arc pad to the center of the arc-shaped concave surface, the vertical oil duct is connected with the horizontal oil duct in an inlet, and the vertical oil duct is communicated with the center of the oil groove in an outlet.
According to the supporting structure of the rough rolling lower roll bearing box, the outer side end face of the cylindrical nut is provided with the rectangular groove.
In the supporting structure of the rough rolling lower roll bearing box, the middle part of the connecting screw rod is provided with symmetrical clamping planes.
The utility model discloses to under the effect of long-term superstrong rolling force, the problem of parts stress concentration such as lower roll bearing case and pressure head has carried out following improvement: 1. improving the structure of the cylindrical pad; 2. a concave arc pad is additionally arranged; 3. the cylindrical pad and the concave arc pad are elastically connected. The improvement can uniformly distribute the rolling force, so that the lower roll bearing box and the gasket are in surface contact, the stress tends to be balanced and reasonable, the phenomenon of local abrasion deformation of the lower roll bearing box under the action of the super-strong rolling force is effectively eliminated, and the adverse effect of pressure concentration on a pressure head and a rolling mill base surface caused by the line contact is eliminated.
Drawings
The present invention will be further explained with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is an enlarged partial view at E in FIG. 1;
FIG. 3 is a schematic view of the assembled relationship of the cylindrical pad and the concave arc pad (section B-B of FIG. 4);
FIG. 4 is a cross-sectional view A-A of FIG. 3;
FIG. 5 is a schematic structural view of a cylindrical nut;
FIG. 6 is a left side view of FIG. 5;
FIG. 7 is a schematic diagram of a concave arc pad;
FIG. 8 is a cross-sectional view C-C of FIG. 7;
FIG. 9 is a schematic view of the construction of the connecting screw;
FIG. 10 is a cross-sectional view D-D of FIG. 9;
FIG. 11 is a schematic view of the structure of the cylindrical pad (sectional view G-G of FIG. 12)
FIG. 12 is a cross-sectional view F-F of FIG. 11;
FIG. 13 is a schematic view of the rough mill under working stress.
The list of labels in the figure is: 1. the roll changing device comprises a lower roll, 2, a lower roll bearing box, 3, a roll changing sliding seat body, 4, a pressure head assembly, 5, a rolling mill frame, 6, a cylindrical surface pad, 6-1, a blind hole, 6-2, a bolt hole, 7, a concave arc pad, 7-1, a horizontal oil duct, 7-2, a vertical oil duct, 7-3, an oil groove, 7-4, a stepped bolt hole, 8, an adjusting gasket, 9, a cylindrical nut, 9-1, a threaded hole, 9-2, a rectangular groove, 10, a connecting screw rod, 10-1, a clamping plane, 11 and an elastic pad.
Detailed Description
With reference to fig. 1 and 2, the supporting structure has two sets, the two sets of structures are arranged the same, each supporting structure respectively comprises a lower roll bearing box 2 and a roll changing slide seat body 3 which are arranged at two ends of a lower roll 1, the bottom of each lower roll bearing box is provided with a cylindrical pad 6, the cylindrical pad is provided with a cylindrical protrusion, the axial direction of the cylindrical protrusion is perpendicular to the axial direction of the lower roll, and the cylindrical pad is connected with the bottom of the lower roll bearing box through bolts. An adjusting gasket 8 is arranged in the rectangular groove of the roll changing slide seat body. For solving the line contact problem of bottom roll atress back cylinder pad and gasket, the utility model discloses set up concave arc and filled up 7, concave arc fills up the bottom and is the plane, and concave arc fills up upper portion and is equipped with the arc wall of laminating with the cylinder matching of the evagination that the cylinder filled up, and concave arc fills up the bottom and touches and presses the adjustment gasket, and concave arc fills up and fills up elastic connection with the cylinder.
Referring to fig. 2, 7 and 8, the arc-shaped groove of the concave arc pad and the cylindrical protrusion of the cylindrical pad are mutually contact surfaces, and in order to reduce friction force, an oil groove 7-3 is arranged on the arc-shaped concave surface of the concave arc pad, the oil groove is distributed along the axis of the arc-shaped concave surface, and two ends of the oil groove are closed. The concave arc pad is also provided with a horizontal oil duct 7-1 and a vertical oil duct 7-2, the horizontal oil duct extends from the side wall of the concave arc pad to the center of the arc-shaped concave surface, the inlet of the vertical oil duct is connected with the horizontal oil duct, and the outlet of the vertical oil duct is communicated with the center of the oil groove. Lubricating oil or lubricating grease injected from the inlet of the horizontal oil duct enters the oil groove through the horizontal oil duct and the vertical oil duct. Stepped bolt holes 7-4 are arranged at four corners of the concave arc pad.
Referring to fig. 11 and 12, the front end surface and the rear end surface of the cylindrical pad are respectively provided with a blind hole 6-1, the axis of the blind hole is vertical to the front end surface and the rear end surface of the cylindrical pad, the lower part of each blind hole is provided with a bolt hole 6-2, and the axis of each bolt hole is orthogonal to the blind hole.
Referring to fig. 2 to 6 and fig. 9 and 10, the connection of the concave arc pad and the cylindrical pad is constructed as follows: a cylindrical nut 9 is arranged, the outline of the cylindrical nut is cylindrical, the cylindrical nut is in clearance fit with the blind hole, a threaded hole 9-1 is formed in the middle of the cylindrical nut, the axis of the threaded hole is orthogonal to the axis of the cylindrical nut, a rectangular groove 9-2 is formed in the end face of the outer side of the cylindrical nut, and the rectangular groove serves as a mark on the one hand; and on the other hand, the groove is poked, and the rectangular groove is poked to adjust the direction of the threaded hole of the cylindrical nut. A connecting screw rod 10 is arranged, external threads are arranged at two ends of the connecting screw rod, and symmetrical clamping planes 10-1 are arranged in the middle of the screw rod. And a cylindrical nut 9 is arranged in each blind hole of the cylindrical pad, the rectangular groove is adjusted to ensure that a threaded hole 9-1 of the cylindrical nut is coaxial with a bolt hole 6-2 of the cylindrical pad, a connecting screw rod 10 penetrates through a stepped bolt hole 7-4 of the concave arc pad, the upper end of the connecting screw rod is screwed with the threaded hole of the cylindrical nut, the lower end of the connecting screw rod is screwed with the nut, and an elastic pad 11 is arranged at the shoulder of the nut and the stepped bolt hole. A radial gap is reserved between the connecting screw rod and the stepped bolt hole.
The working principle of the utility model is as follows: when the lower roller is stressed to bend, the cylindrical pad rotates relative to the concave arc pad, and the cylindrical pad and the concave arc pad are still in surface contact; the connecting screw rod can generate a certain amount of inclined displacement along with the rotation of the cylindrical pad relative to the concave arc pad, and the inclined displacement of the connecting screw rod can be compensated by the arrangement of the cylindrical nut and the elastic pad, so that the connecting screw rod is prevented from being broken due to overlarge stress. The concave arc pad and the adjusting shim are kept in surface contact in the process.
Adopt the utility model discloses a design, lower roll bearing box and gasket atress are even, have eliminated because of the harmful effects of line contact pressure concentration that causes to pressure head and rolling mill base face.
Claims (5)
1. The utility model provides a roll bearing box bearing structure under rough rolling, includes cylindrical pad (6) of installation roll bearing box bottom under, its characterized in that: the roller changing slide seat is characterized by further comprising a concave arc pad (7) and an adjusting pad (8), wherein the adjusting pad and the concave arc pad are located in a rectangular groove of the roller changing slide seat body (3), the bottom of the concave arc pad is a plane, an arc-shaped groove matched with the convex cylindrical surface of the cylindrical surface pad in a matching mode is arranged on the upper portion of the concave arc pad, the bottom of the concave arc pad is in contact with the adjusting pad, and the concave arc pad is elastically connected with the cylindrical surface pad.
2. The roughing lower roll bearing housing support structure of claim 1, wherein: the front end face and the rear end face of the cylindrical pad are respectively provided with a blind hole (6-1), the axis of the blind hole is perpendicular to the front end face and the rear end face of the cylindrical pad, a bolt hole (6-2) is arranged at the lower part of each blind hole, the axis of the bolt hole is orthogonal to the blind hole, a cylindrical nut (9) is installed in each blind hole, the outline of the cylindrical nut is cylindrical, a threaded hole (9-1) is arranged in the middle of the cylindrical nut, the axis of the threaded hole is orthogonal to the axis of the cylindrical nut, a stepped bolt hole (7-4) is arranged on the concave arc pad, a connecting screw rod (10) penetrates through the stepped bolt hole of the concave arc pad, the upper end of the connecting screw rod is screwed with the threaded hole of the cylindrical nut.
3. The roughing lower roll bearing housing support structure of claim 2, wherein: the oil groove (7-3) is arranged on the arc-shaped concave surface of the concave arc pad and distributed along the axis of the arc-shaped concave surface, the horizontal oil passage (7-1) and the vertical oil passage (7-2) are further arranged on the concave arc pad, the horizontal oil passage extends from the side wall of the concave arc pad to the center of the arc-shaped concave surface, the inlet of the vertical oil passage is connected with the horizontal oil passage, and the outlet of the vertical oil passage is communicated with the center of the oil groove.
4. The roughing down roll bearing housing support structure of claim 3, wherein: and a rectangular groove (9-2) is arranged on the outer side end face of the cylindrical nut.
5. The roughing down roll bearing housing support structure of claim 4, wherein: the middle part of the connecting screw rod is provided with symmetrical clamping planes (10-1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921183783.6U CN210497662U (en) | 2019-07-25 | 2019-07-25 | Supporting structure of rough rolling lower roll bearing box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921183783.6U CN210497662U (en) | 2019-07-25 | 2019-07-25 | Supporting structure of rough rolling lower roll bearing box |
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| Publication Number | Publication Date |
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| CN210497662U true CN210497662U (en) | 2020-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921183783.6U Active CN210497662U (en) | 2019-07-25 | 2019-07-25 | Supporting structure of rough rolling lower roll bearing box |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111744972A (en) * | 2020-06-30 | 2020-10-09 | 宁波钢铁有限公司 | Rolling mill rolling force detection structure |
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2019
- 2019-07-25 CN CN201921183783.6U patent/CN210497662U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111744972A (en) * | 2020-06-30 | 2020-10-09 | 宁波钢铁有限公司 | Rolling mill rolling force detection structure |
| CN111744972B (en) * | 2020-06-30 | 2021-11-23 | 宁波钢铁有限公司 | Rolling mill rolling force detection structure |
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