CN212917021U - Clamping plate structure for end face of working roll of roughing mill - Google Patents

Abstract

The utility model provides a roughing mill working roll terminal surface cardboard structure, including working roll bearing box and cardboard body, two cardboard bodies are connected with the rolling mill frame through the cardboard bolt, still include the pressure plate that lives, pressure plate bolt and dish spring live, the pressure plate that lives is located between cardboard body and the bearing box boss, be equipped with one row of several step hole on the cardboard body, the downthehole dish spring of packing into of major diameter in step hole, pressure plate bolt that lives passes step hole and dish spring, the tip and the pressure plate threaded connection of pressure plate bolt live, a side end face of pressure plate leaves the buffering clearance with the cardboard, another terminal surface of pressure plate touches pressure bearing box boss. The utility model discloses beneficial effect as follows: 1. the clamping plate body is improved, so that a certain buffer gap is reserved between the clamping plate body and a boss of a bearing box of the working roller, and the defect that a clamping plate bolt is broken is effectively overcome; 2. the waist-shaped bolt hole of the clamping plate is provided with the guide groove, the guide pad matched with the guide groove is additionally arranged at the same time, the contact area between the clamping plate and the guide pad is increased, the rotation of the clamping plate is restrained, and the blocking phenomenon of the clamping plate is obviously improved.

Description

Clamping plate structure for end face of working roll of roughing mill

Technical Field

The utility model relates to a roughing device, especially roughing mill working roll terminal surface cardboard structure.

Background

Two high roughing mills are widely used in hot continuous roughing mill trains. Two ends of each working roll of the two-roll roughing mill are respectively provided with a bearing box for supporting the working roll, namely an operation side bearing box and a transmission side bearing box, two sides of a box body of the operation side bearing box are respectively provided with a boss, when the working roll is arranged in the roughing mill, the inner side of the boss on the operation side bearing box is attached to the rolling mill to position the working roll, then the clamping plate is closed, the outer side of the boss of the bearing box is contained by the inner side of the closed clamping plate, and the bearing box and the rolling roll are together restrained in the rolling mill, as shown in figure 8. This kind of traditional bearing box cardboard structure has following two drawbacks, 1, cardboard bolt fracture easily. The working rolls of the two-roll roughing mill are directly acted by rolling force, certain axial force can be generated by the upper working roll and the lower working roll during steel rolling, when the direction of the generated axial force is towards the transmission side (called negative axial force), the boss on the bearing box on the operating side of the working rolls is tightly attached to the mill frame, the working rolls are axially constrained, when the direction of the generated axial force is towards the operating side (called positive axial force), the outer face of the boss on the bearing box of the working rolls is tightly attached to the clamping plate, and the working rolls are axially constrained by the clamping plate. The probability of generating positive axial force and negative axial force by the working roll is approximately the same, but the constraint force of the clamping plate is far less than that of the rolling stand, so that when the axial force reaches a certain value, the clamping plate bolt is broken, in other words, the position of the bearing box on the operating side moves outwards, which is the main reason for breaking the clamping plate bolt; in addition, when steel is rolled, the working roll is forced to bend outwards as shown in fig. 9, the bearing boxes on both sides are inclined, if the bearing boxes on the operating side are already attached to the clamping plate outwards before steel biting, the bearing boxes on the operating side tend to push the clamping plate outwards again, and the distance of outwards moving after the bearing boxes are inclined is short, but the force path is large. The two phenomena generate outward thrust on the clamping plate, and the two thrusts have the common characteristic that the thrust is large but the moving distance is short. 2. The phenomenon of blocking when the card board is opened and closed. The cardboard needs be in the closed condition during steel rolling, the cardboard implements axial restraint to operation side bearing box boss, when changing the working roll, the cardboard needs be in the open condition, cardboard and working roll operation side bearing box boss are the contact during steel rolling under the normal conditions, in order to reduce because of the spring of working roll pull the shearing that leads to the fact the cardboard bolt to the cardboard, open the movement track of closing with the cardboard and make into 45 contained angles with the level, every cardboard is dragged in cardboard one end with a cardboard hydro-cylinder, so just appear when the resistance of the other end is great, because there is certain clearance in bolt and waist shape hole, the card phenomenon probability increase appears in the great one end of resistance, the cardboard uses the big point of resistance to rotate as the centre of a circle, form the card and hinder.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a to prior art's drawback, provide one kind and can effectively eliminate the easy cracked drawback of cardboard bolt and avoid the cardboard to open the roughing mill working roll terminal surface cardboard structure that closes the card and hinder the phenomenon.

The problem of the utility model is realized with following technical scheme:

the utility model provides a roughing mill working roll terminal surface cardboard structure, cardboard body including working roll bearing box and symmetry setting, two cardboard bodies are connected with the rolling mill frame through the cardboard bolt, still include the pressure plate that lives, pressure plate bolt and dish spring live, the pressure plate that lives is located between cardboard body and the bearing box boss, be equipped with one row of several step hole on the cardboard body, the downthehole dish spring that packs into of major diameter in step hole, pressure plate bolt that lives passes step hole and dish spring, the tip and the pressure plate threaded connection of pressure plate bolt live, a side end face of pressure plate leaves the buffering clearance with the cardboard, another terminal surface of pressure plate touches pressure bearing box boss.

According to the clamping plate structure for the end face of the working roll of the roughing mill, the buffer gap is 3-4 mm, and the compression amount of the disc spring is larger than 5 mm.

Above-mentioned roughing mill working roll terminal surface cardboard structure still includes the direction pad, and the direction pad matches the suit on the cardboard bolt, is equipped with the cardboard bolt hole of several waist shape on the cardboard body, and each cardboard bolt hole top surface is equipped with the guide way, and the outline of guide way is for the waist shape similar with the cardboard bolt hole, and the outline of guide way is greater than the outline of cardboard bolt hole, and the direction pad is equipped with the direction boss, and the direction boss matches and installs in the guide way.

According to the clamping plate structure for the end face of the working roll of the roughing mill, the depth of the guide groove is 9-11 mm, and the thickness of the guide boss is smaller than that of the guide groove.

The utility model discloses improve to the problem of solving traditional roughing mill working roll terminal surface cardboard and exist, its beneficial effect as follows: 1. the clamp plate body is improved, the movable press plate, the press plate bolt and the disc spring are additionally arranged, a certain buffer gap is reserved between the clamp plate body and a boss of the bearing box of the working roller, the closing requirement of the clamp plate on the boss of the bearing box is ensured, and the butterfly spring can be moved outwards in the bearing box and compressed, so that the bearing box has a small-distance outwards-moving space, and the defect that the clamp plate bolt is broken is effectively avoided; 2. the waist-shaped bolt hole of the clamping plate is provided with the guide groove, the guide pad matched with the guide groove is additionally arranged at the same time, the contact area between the clamping plate and the guide pad is increased, the rotation of the clamping plate is restrained, and the blocking phenomenon of the clamping plate is obviously improved.

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 a top view of FIG. 1;

FIG. 3 is a schematic structural view of the card body;

FIG. 4 is a cross-sectional view A-A of FIG. 3 (not to scale);

FIG. 5 is a cross-sectional view B-B of FIG. 3 (not to scale);

FIG. 6 is a schematic view of the structure of the guide pad;

FIG. 7 is a left side view of FIG. 6;

FIG. 8 is a schematic view of a prior art card construction;

FIG. 9 is a schematic view of the work rolls forced to bow outward.

The list of labels in the figure is: 1. the device comprises a rolling stand, 2 parts of a clamping plate body, 2 parts to 1 parts of a clamping plate bolt hole, 2 parts to 2 parts of a guide groove, 3 parts of a working roller bearing box, 3 parts to 1 parts of a bearing box boss, 4 parts of a working roller, 5 parts of a clamping plate oil cylinder, 6 parts of a clamping plate bolt, 7 parts of a movable pressing plate bolt, 8 parts of a movable pressing plate, 9 parts of a buffer gap, 10 parts of a disc spring, 11 parts of a guide pad, 11 parts to 1 parts of a guide boss.

Detailed Description

Referring to fig. 1 and 2, the utility model discloses a work roll bearing box 3 sets up two cardboard bodies 2 in work roll bearing box both sides with the symmetry, and two cardboard bodies are connected with rolling frame 1 through cardboard bolt 6, and work roll bearing box bilateral symmetry sets up bearing box boss 3-1, and the piston rod of a cardboard hydro-cylinder 5 is connected respectively to the lower part of each cardboard body.

Referring to fig. 2-4, in order to solve the problem that the snap-gauge bolt is easy to break, the utility model discloses activity board 8, activity board bolt 7 and dish spring 10 have been set up. The movable pressing plate is positioned between the clamping plate body and the boss of the bearing box, and a threaded hole is formed in the movable pressing plate. The clamp plate body is provided with a row of a plurality of step holes, the large-diameter holes of the step holes are close to one side of the bearing box of the working roller, the disc springs are arranged in the large-diameter holes of the step holes, the movable clamp plate bolts penetrate through the step holes and the disc springs, the end parts of the movable clamp plate bolts are in threaded connection with the threaded holes of the movable clamp plate, a buffer gap 9 is reserved between the end surface of one side of the movable clamp plate and the clamp plate under the support of the disc springs, and the boss of the bearing box is touched and. The buffer gap is 3-4 mm, and the compression amount of the disc spring is more than 5 mm. Above-mentioned structure gives the displacement space of working roll bearing box a small amount, and when the steel rolling operation, the working roll bearing box atress outwards shifted, compressed dish spring treats this piece of steel rolling completion back, and the working roll returns the normal position under the elasticity of dish spring to effectively avoid the cracked drawback of cardboard bolt tension.

The utility model discloses a another improvement sets up direction pad and guide way, and the reinforcing is to the spacing guide effect of cardboard body. Referring to fig. 1, 3 and 6-7, the clamping plate body is provided with a plurality of obliquely arranged waist-shaped clamping plate bolt holes 2-1, guide grooves 2-2 are machined in the top surfaces of the clamping plate bolt holes after improvement, the outlines of the guide grooves are waist shapes similar to the clamping plate bolt holes, and the outlines of the guide grooves are larger than the outlines of the clamping plate bolt holes. The guide pad 11 is arranged and sleeved on the clamping plate bolt in a matching mode, a guide boss 11-1 is machined on the guide pad, and two planes of the guide boss are installed in the guide groove in a matching mode. The depth of the guide groove is 9-11 mm, and the thickness of the guide boss is smaller than the depth of the guide groove. After setting up guide way and direction pad, the cardboard bolt hole increases with the contact surface of direction pad, can effectively restrain the rotation trend of cardboard body to obviously improve the cardboard jamming phenomenon.

Claims (4)

1. The utility model provides a roughing mill working roll terminal surface cardboard structure, includes cardboard body (2) that working roll bearing box (3) and symmetry set up, two cardboard bodies are connected its characterized in that through cardboard bolt (6) and rolling mill frame (1): the bearing box with the movable pressing plate comprises a clamping plate body and a bearing box boss, and is characterized by further comprising a movable pressing plate (8), a movable pressing plate bolt (7) and a disc spring (10), wherein the movable pressing plate is located between the clamping plate body and the bearing box boss, a row of multiple step holes are formed in the clamping plate body, the disc spring is arranged in a large-diameter hole of each step hole, the movable pressing plate bolt penetrates through the step holes and the disc spring, the end portion of the movable pressing plate bolt is in threaded connection with the movable pressing plate, a buffering gap (9) is reserved between one side end face.

2. The roughing mill work roll end face clamp plate structure of claim 1, wherein: the buffer gap is 3-4 mm, and the compression amount of the disc spring is more than 5 mm.

3. The roughing mill work roll end face clamp plate structure of claim 1, wherein: the clamping plate bolt structure is characterized by further comprising a guide pad (11), the guide pad is sleeved on the clamping plate bolt in a matched mode, a plurality of waist-shaped clamping plate bolt holes (2-1) are formed in the clamping plate body, guide grooves (2-2) are formed in the top surfaces of the clamping plate bolt holes, the outline of each guide groove is in a waist shape similar to the clamping plate bolt hole, the outline of each guide groove is larger than the outline of each clamping plate bolt hole, guide bosses (11-1) are arranged on the guide pad, and the guide bosses are installed in the guide grooves in.

4. The roughing mill work roll end face clamp plate structure of claim 3, wherein: the depth of the guide groove is 9-11 mm, and the thickness of the guide boss is smaller than the depth of the guide groove.

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