CN203343175U

CN203343175U - Horizontal roll of universal rolling mill

Info

Publication number: CN203343175U
Application number: CN 201320362734
Authority: CN
Inventors: 王庆军; 马旭东; 耿立波
Original assignee: Sinosteel Xingtai Machinery and Mill Roll Co Ltd
Current assignee: Sinosteel Xingtai Machinery and Mill Roll Co Ltd
Priority date: 2013-06-21
Filing date: 2013-06-21
Publication date: 2013-12-18
Anticipated expiration: 2023-06-21

Abstract

The utility model discloses a horizontal roll of a universal rolling mill, and is applicable to the field of metallurgical machines. The horizontal roll of the universal rolling mill comprises a roll shaft composed of a roll body, a roll neck and a roll head. A roll cover is fixedly mounted on the periphery of the roll body. A positioning step is arranged at one end of the roll body. The outer end face of the positioning step is provided with at least one lower key groove. One end of an inner bore of the roll cover is provided with a step groove and an upper key groove. A circumferential positioning key is arranged between the lower key groove and the upper key groove. A common fine thread is machined at one end of the roll body, and a thread bushing is mounted on the common fine thread in a matched mode. By means of the horizontal roll of the universal rolling mill, bidirectional positioning of the roll cover and the roll shaft is realized, the magnitude of interference of assembly of the roll cover and the roll shaft is small, the machining is simple, the dismantling is convenient, and the service life of the horizontal roll is prolonged.

Description

A kind of horizontal roll of universal mill

Technical field

The utility model relates to a kind of roll, specifically a kind of horizontal roll of universal mill.

Background technology

Universal mill can be used to all kinds of shaped steel of rolling, and roll is the important process part on universal mill, utilizes the pressure between a pair of or one group of roll rolled, and makes the metal rolled piece produce plastic deformation, obtains the shape of required form.The quality of roll is determining the quality of production of stocking and the efficiency of milling train.What originally the horizontal roll of universal mill adopted is the static casting roll of low-carbon alloy steel, and the content of this roll carbon and alloy is low, and quenching degree is poor, hardness is low, wears no resistance, and roll is serious wear in use, rolling cost is high, can not meet the user to product quality and the requirement that reduces production costs.

In order to improve wearability, roll is gradually to high-carbon high-alloy half steel material future development, brought thus roll strength and toughness constantly to descend, cause the generation of fracture of roller phenomenon, for wearability and the toughness that makes roll is improved simultaneously, universal mill horizontal roller at present commonly used adopts edge cover assembly roller, and horizontal roll is combined by roller shell and roll shaft.Roller shell is assembled on roll shaft by thermal contraction, in work, roll torque relies on the frictional force between roll shaft and roller shell contact-making surface to transmit, so is designed with certain assembling magnitude of interference between roller shell and roll shaft, adopts interference fit to prevent the phenomenon that occurs that in the operation of rolling roller shell and roll shaft skid.When the magnitude of interference hour, roller shell and roll shaft easily assemble, but in the operation of rolling, rise and come off because the temperature height easily makes roller shell produce heat, or between roll shaft and roller shell because the frictional force deficiency causes roll torque inadequate, roll shaft and roller shell mating surface are skidded, be that roller shell relatively rotates on the roll shaft circumferencial direction, not only can increase production cost, even cause the accident, cause normally steel rolling production of enterprise.In order to obtain larger roll torque, just require roller shell that the larger assembling magnitude of interference is arranged, but the magnitude of interference is large, not only assembling process is also more difficult, also increased the thermal shrinkage stress in the roller shell, easily cause the roller shell cracking during assembling, or in the production process when steel rolling, the thermal shrinkage stress of roller shell and the stack of roll working load stress, roller shell roll shaft stress excessive and crack, rupture, peel off, the various damages such as impression, affected the service life of roll, increased cost, impact is produced.

The utility model content

The utility model technical issues that need to address are to provide a kind of horizontal roll that assembles the universal mill that the magnitude of interference is little.

For solving the problems of the technologies described above, the technical scheme that the utility model adopts is:

A kind of horizontal roll of universal mill, comprise the roll shaft formed by the body of roll, roll neck and roller head, body of roll excircle fixed installation roller shell, one end of the described body of roll is provided for the positioning step that the pair roller cover carries out axial location, and the outer face of positioning step arranges at least one and carries out the circumferentially lower keyway of location for the pair roller cover; One end setting of described roller shell endoporus and the corresponding step groove of positioning step, the upper keyway corresponding with lower keyway arrange circumferential positioning key between lower keyway and upper keyway; Be processed with common fine thread on the circumference in the corresponding roller shell end face of the described body of roll other end outside, coordinate the thread bush that the 42CrMo modifier treatment for propping up the roller shell end face is installed on common fine thread.

Further improvement of the utility model is: the wall thickness of described thread bush is not less than 30mm, and the length of thread bush is not less than 80mm.

Further improvement of the utility model is: the described body of roll and roller shell are that hot charging is joined, and the assembling magnitude of interference is barrel diameter 0.2 ‰～0.5 ‰.

Further improvement of the utility model is: the end face fit-up gap of described thread bush and roller shell is less than 0.05mm.

Owing to having adopted technique scheme, the technological progress that the utility model is obtained is:

The utility model arranges respectively positioning step and thread bush in the body of roll both sides of roll shaft, the pair roller cover carries out axial location, simultaneously circumferentially the pair roller cover that arranges of positioning key is circumferentially located, and the two-way location of roller shell has been avoided because the roll that roller shell causes along the circumferential and axial play of roll shaft is scrapped.

The assembling magnitude of interference of the body of roll and roller shell is barrel diameter 0.2 ‰～0.5 ‰, the less assembling magnitude of interference between roller shell and roll shaft, the phenomenon of roller shell cracking after the assembling of having avoided causing more greatly because of the assembling magnitude of interference, reduced at work the damage that stress stack breaker roll causes, extended the service life of roll simultaneously.

Thread bush adopts the common internal thread of closely-pitched to be connected with the body of roll, has good self-locking property, the while convenient disassembly, and roller shell dismounting difficulty is little, and workload is little, is conducive to the recycling of roll shaft.

The wall thickness of thread bush is not less than 30mm, and length is not less than 80mm, has guaranteed the effective length that the common internal thread of closely-pitched connects, and has guaranteed the positive connection of thread bush and the body of roll.

The accompanying drawing explanation

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the side view of roll shaft of the present utility model;

Fig. 3 is the side view of roller shell of the present utility model;

Wherein, 1, the body of roll, 2, roller shell, 3, positioning step, 4, lower keyway, 5, step groove, 6, upper keyway, 7, circumferential positioning key, 8, thread bush.

The specific embodiment

Below in conjunction with accompanying drawing, the utility model is described in further details:

A kind of horizontal roll of universal mill, as shown in Figure 1, comprise roll shaft and roller shell 2, and roll shaft is comprised of the body of roll 1, roll neck and roller head, and roller shell 2 is arranged on the excircle of the body of roll 1.One end of the body of roll 1 arranges positioning step 3, and positioning step 3 is for carrying out axial location to roller shell 2.The outer face of positioning step 3 arranges a lower keyway 4, as shown in Figure 2.Endoporus one end of roller shell 2 arranges step groove 5 and upper keyway 6, as shown in Figure 3, step groove 5 and positioning step 3 block mutually and, upper keyway 6 and lower keyway 4 are complementary, between lower keyway 4 and upper keyway 6, the circumferential positioning key 7 of assembling, circumferentially circumferentially locate between 7 pairs of roller shells 2 of positioning key and the body of roll 1.Be processed with common fine thread on the circumference of the body of roll 1 other end, the position of common fine thread is corresponding with the roller shell 2 end face outsides, coordinate on common fine thread thread bush 8 is installed, the wall thickness of thread bush 8 is 40mm, length is 80mm, thread bush 8 materials are 42CrMo, and through modifier treatment, thread bush 8 is for propping up the other end of roller shell 2.

The body of roll 1 and roller shell 2 are joined for hot charging, and hot charging refines the cylindrical at the body of roll 1 encapsulation position before joining, the assembling position in fine grinding 2 li holes of roller shell.The assembling magnitude of interference of the body of roll 1 and roller shell 2 is barrel diameter 0.2 ‰～0.5 ‰.After being heated to uniform temperature, roller shell 2 is incubated, be assembled to the encapsulation position of the body of roll 1, the step groove 5 that makes roller shell 2 and the reliable card of positioning step 3 and, and make the lower keyway 4 on positioning step 3, corresponding with the position of upper keyway 6 on roller shell 2, squeeze into circumferential positioning key 7, make roller shell 2 realize circumferentially location.By the body of roll 1 and roller shell 2 cool to room temperature that assemble, at the opposite side of the body of roll 5, thread bush 8 to be installed, and thread bush 8 to be carried out fastening, thread bush 8 is less than 0.05mm with the gap of roller shell 2 end faces, and that realizes roller shell 2 axially holds out against location.

Claims

1. the horizontal roll of a universal mill, comprise the roll shaft formed by the body of roll (1), roll neck and roller head, the body of roll (1) excircle fixed installation roller shell (2), it is characterized in that: an end of the described body of roll (1) is provided for roller shell (2) is carried out the positioning step (3) of axial location, and the outer face of positioning step (3) arranges at least one for roller shell (2) being carried out to the circumferentially lower keyway (4) of location; The step groove (5) that one end setting of described roller shell (2) endoporus coordinates with positioning step (3), the upper keyway (6) coordinated with lower keyway (4) arrange circumferential positioning key (7) between lower keyway (4) and upper keyway (6); Be processed with common fine thread on the circumference in corresponding roller shell (2) end face of the described body of roll (1) other end outside, coordinate the thread bush (8) that the 42CrMo modifier treatment for propping up roller shell (2) end face is installed on common fine thread.

2. the horizontal roll of a kind of universal mill according to claim 1, it is characterized in that: the described body of roll (1) and roller shell (2) are joined for hot charging, and the assembling magnitude of interference is barrel diameter 0.2 ‰～0.5 ‰.

3. the horizontal roll of a kind of universal mill according to claim 1 and 2, it is characterized in that: the wall thickness of described thread bush (8) is not less than 30mm, and the length of thread bush (8) is not less than 80mm.

4. the horizontal roll of a kind of universal mill according to claim 3 is characterized in that: described thread bush (8) is less than 0.05mm with the end face fit-up gap of roller shell (2).