CN213256273U

CN213256273U - Replaceable roller

Info

Publication number: CN213256273U
Application number: CN202021983996.XU
Authority: CN
Inventors: 顾晓辉; 樊海明
Original assignee: Shanghai Jiangnan Roller Co ltd
Current assignee: Shanghai Jiangnan Roller Co ltd
Priority date: 2020-09-11
Filing date: 2020-09-11
Publication date: 2021-05-25
Anticipated expiration: 2030-09-11

Abstract

The utility model provides a but substitution roll, including roll main part and outer snare, outer snare detachable cover is established outside the roll main part, be provided with a plurality of spacing keys in the roll main part, be provided with a plurality of spacing keyways on the inner wall of outer snare, spacing key with spacing keyway one-to-one and card go into in the spacing keyway that corresponds. The outer ring sleeve is detachably sleeved on the roller main body, so that the roller main body can be repeatedly repaired, when the roller surface of the repaired roller reaches the limit, the old outer ring sleeve can be detached, and the new outer ring sleeve can be replaced to be used on the machine again. And through the matching use of the limiting key and the limiting key groove, the installation of the outer ring sleeve can be quickly guided and positioned, the installation efficiency is improved, and meanwhile, the phenomenon of skidding of the outer ring sleeve in the loading process after the outer ring sleeve is sleeved on the roller main body can be prevented.

Description

Replaceable roller

Technical Field

The utility model relates to a roll is restoreed or is made technical field, especially relates to a but substitution roll.

Background

At present, most of steel pipe manufacturers use high-chromium composite cast steel rollers, the roller cores of the rollers are ball-milled cast iron, the roller bodies of the rollers are made of high-chromium cast steel, and the hardness of the roller bodies generally needs to reach more than HRC 60. During the use process of the roller, after the roller is used on a machine for a specified time, the roller needs to be ground by a certain amount to eliminate a fatigue layer generated on the surface of the roller. When the grinding amount reaches about 20mm in the radius direction, the hardness of the roller surface is reduced, so that the normal production requirements cannot be met, and the roller can only be scrapped.

Along with the cost control requirement of a steel mill, the scrapped roller needs to be repaired, so that the hardness requirement is met, and the technical performance of the roller on machine is met. The conventional repair method comprises 2 methods:

1) the surfacing repair is carried out, and the high-chromium cast steel material has poor welding performance and low hardness, so that even if the high-chromium cast steel material can be repaired, the service performance is far inferior to the performance of a new roller due to the factors of low hardness of the roller surface, poor wear resistance and the like;

2) the laser cladding repair, the laser cladding can be configured with the required performance according to the specific requirements, but the repair cost is high, and the repair price is higher than the new roller manufacturing price, so the laser cladding is not suitable for repairing the rollers.

In addition, the repair layer of surfacing and laser cladding has limited quality detection means, can only detect the surface quality condition, cannot well detect the internal quality of the repair layer, and is easy to cause quality safety problems in the use process.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a but substitution roll, the old roll of restoration that can be swift convenient, the roll quality that restores is controllable, but the low and repeated restoration of restoration cost.

In order to achieve the purpose, the utility model provides a but substitution roll, including roll main part and outer snare, outer snare detachable cover is established outside the roll main part, be provided with a plurality of spacing keys in the roll main part, be provided with a plurality of spacing keyways on the inner wall of outer snare, spacing key with spacing keyway one-to-one and card go into in the spacing keyway that corresponds.

Optionally, the roller main body is further provided with a stop block, one end of the outer ring sleeve is provided with a positioning groove, the positioning groove is located on the inner wall of the outer ring sleeve, and at least part of the stop block is located in the positioning groove to abut against the end of the outer ring sleeve.

Optionally, the outer ring is annular.

Optionally, the positioning groove and the stopper are both annular, and the diameter of the positioning groove is greater than that of the stopper.

Optionally, the stopper and the roller main body are of an integrally formed structure.

Optionally, the stopper is connected with the roller main body by welding.

Optionally, the outer ring sleeve is connected with the roller main body in a hot-charging mode.

Optionally, the outer ring sleeve is made of high-chromium cast steel.

Optionally, the number of the limiting keys is multiple, and the multiple limiting keys are uniformly distributed along the circumferential direction of the roller main body.

Optionally, the limit key is a flat key or a semicircular key.

Drawings

Fig. 1 is a sectional view of a replaceable roller according to an embodiment of the present invention;

fig. 2 is an overall view of a replaceable roller according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a roller main body according to an embodiment of the present invention;

wherein the reference numerals are:

10-a roll body; 20-outer ring sleeve; 30-a limit key; 40-a stop.

Detailed Description

The following description of the embodiments of the present invention will be described in more detail with reference to the drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention.

As shown in fig. 1 and 2, the embodiment provides a replaceable roller, which includes a roller main body 10 and an outer ring sleeve 20, the outer ring sleeve 20 is detachably sleeved outside the roller main body 10, a plurality of limit keys 30 are arranged on the roller main body 10, a plurality of limit key slots are arranged on the inner wall of the outer ring sleeve 20, and the limit keys 30 are in one-to-one correspondence with the limit key slots and are clamped into the corresponding limit key slots.

Specifically, the roller main body 10 is a high-chromium composite cast steel roller, the hardness is high, the wear resistance is good, the roller core is ball-milling cast iron, the roller body is made of high-chromium cast steel, and the hardness of the roller body generally needs to reach more than HRC 60. After the roller main body 10 is used for a period of time, the hardness of the roller surface is reduced, so that the requirements of normal production cannot be met, and the roller main body needs to be repaired.

The outer ring sleeve 20 is used for repairing the roller and improving the hardness of the surface of the roller, so that the requirement of the rolling machine is met. And because the outer ring sleeve 20 is detachably sleeved outside the roller main body 10, the roller main body can be repeatedly repaired, when the roller surface of the repaired roller reaches the limit, the old outer ring sleeve 20 can be detached, and the new outer ring sleeve 20 can be replaced to be used again.

In this embodiment, the outer ring 20 is made of high-chromium cast steel, and the high-chromium cast steel having the same material as the roll body of the roll main body 10 is used to ensure that the outer ring steel sleeve has sufficient strength and hardness, so as to meet the operational performance of the roll. Of course, if the roll body of the roll main body 10 is made of other materials, the outer ring 20 may be consistent with the roll body of the roll main body 10.

Since the outer ring 20 and the roller need to be connected in an interference fit manner, the outer ring 20 and the roller body 10 can be detachably connected through a shrink fit connection. The hot-charging process has high construction efficiency and high connection strength, and can better fix the outer ring sleeve 20 on the roller. In this embodiment, when the outer ring sleeve 20 needs to be installed, the outer ring sleeve 20 may be heated to increase the inner diameter of the outer ring sleeve 20, so that the outer ring sleeve 20 is sleeved on the roller main body 10, and similarly, when the outer ring sleeve 20 needs to be detached, the outer ring sleeve 20 is heated again to detach the outer ring sleeve 20. Heating methods which can be used for the hot-fit connection include resistance, radiation or induction heating, flame local heating of a torch, oxyacetylene or propane and the like.

In this embodiment, the heating temperature during the hot-fix connection is not higher than 200 ℃. Too high a temperature may cause the outer ring 20 to overheat and anneal, affecting the hardness of the outer ring 20.

Referring to fig. 1 and 3, a plurality of limiting keys 30 are arranged on the roller main body 10, a plurality of limiting key slots are arranged on the inner wall of the outer ring sleeve 20, and the limiting keys 30 are in one-to-one correspondence with the limiting key slots and are clamped into the corresponding limiting key slots. The limiting key 30 is matched with the limiting key groove for use, so that the installation of the outer ring sleeve 20 can be quickly guided and positioned, the installation efficiency is improved, and the phenomenon of slipping in the loading process after the outer ring sleeve 20 is sleeved on the roller main body 10 can be prevented.

Optionally, the number of the limiting keys 30 is multiple, and the multiple limiting keys 30 are uniformly distributed along the circumferential direction of the roller main body 10. The number of the limiting keys 30 may be one or more, and the application does not limit the number of the limiting keys 30. When the number of the limiting keys 30 is plural, the plural limiting keys 30 are uniformly distributed along the circumferential direction of the roll main body 10. Similarly, the distribution mode of the limiting key 30 is not limited in this application, and may be uniform distribution or non-uniform distribution, which is not limited in this application.

The limit key 30 is a flat key or a semicircular key. In this embodiment, the roller main body 10 and the outer ring sleeve 20 may be connected by a loose key, and the limit key 30 may be a flat key or a semicircular key, which is simple in structure and good in stability. Of course, other methods such as a tight key connection may be used, and the present application is not limited thereto.

Referring to fig. 1 and fig. 3, the roller body 10 is further provided with a stopper 40, one end of the outer ring sleeve 20 is provided with a positioning groove, the positioning groove is located on the inner wall of the outer ring sleeve 20, and at least part of the stopper 40 is located in the positioning groove to abut against the end of the outer ring sleeve 20. The stop 40 is used for positioning the outer ring when the outer ring is installed. Due to the stop 40, the outer ring 20 only needs to be assembled from one end of the roller body 10 far away from the search stop 40, and when one end of the outer ring 20 touches the stop 40, the outer ring stops, so that the outer ring 20 is positioned, and the outer ring 20 can be prevented from moving along the axial direction of the roller body 10.

In this embodiment, the outer ring 20 is annular. Of course, the outer ring 20 may also be selected to have other shapes according to the machining requirement, for example, the outer contour is an arc shape, which is not limited in the present application.

In this embodiment, the positioning groove and the stopper 40 are both annular, and the diameter of the positioning groove is greater than that of the stopper 40. It should be understood that the positioning groove and the block 40 are matched in shape, and may be in a ring shape, or in other shapes, such as a strip shape, and the number of the block 40 and the positioning groove may be one or more, such as a plurality of strip-shaped blocks 40 uniformly distributed along the circumference of the roll main body 10. Therefore, the present application does not have any limitation on the number and shape of the stoppers 40 and the positioning grooves.

Optionally, the stopper 40 and the roller main body 10 are of an integrally formed structure. Alternatively, the stopper 40 is connected to the roll main body 10 by welding. This is not limited by the present application.

It should be understood that the replaceable roll provided in the present embodiment is also applicable to the manufacture of a new roll having the same structure as the replaceable roll.

Based on the above, the application also provides a preparation method of the replaceable roller, which comprises the following specific steps:

the method comprises the following steps: annealing the worn old roller;

step two: processing an old roller, and turning the old roller by taking the minimum diameter of the roller body of the old roller as a reference so as to keep the outer diameter of the roller body of the old roller consistent and ensure the surface of the roller to be smooth and flat, thereby facilitating the subsequent sleeving of an outer sleeve;

step three: customizing a high-chromium cast outer ring sleeve according to the minimum diameter of the old roller body, and ensuring that the outer ring sleeve has enough strength and hardness to meet the usability of the roller on the machine;

step four: processing a positioning key on the old roller and a positioning key groove on the outer ring sleeve to enable the positioning key to be matched with the positioning key groove;

step five: sleeving the outer ring sleeve on the old roller in a hot-charging mode to obtain a repaired new roller, and controlling the hot-charging temperature to be not more than 200 ℃;

step six: and performing finish machining on the new roller to ensure that the size of the new roller meets the requirement.

The new roller obtained by the preparation method of the replaceable roller has the advantages of simple steps, controllable quality and low repair cost, the roller can be repeatedly repaired, when the roller surface of the repaired roller reaches the limit, the old outer ring sleeve can be detached, and the new outer ring sleeve can be replaced for use on the mill again.

To sum up, the embodiment of the utility model provides a but substitution roll, including roll main part and outer snare, outer snare detachable cover is established outside the roll main part, be provided with a plurality of spacing keys in the roll main part, be provided with a plurality of spacing keyways on the inner wall of outer snare, spacing key with spacing keyway one-to-one and go into in the spacing keyway that corresponds. The outer ring sleeve is detachably sleeved on the roller main body, so that the roller main body can be repeatedly repaired, when the roller surface of the repaired roller reaches the limit, the old outer ring sleeve can be detached, and the new outer ring sleeve can be replaced to be used on the machine again. And through the matching use of the limiting key and the limiting key groove, the installation of the outer ring sleeve can be quickly guided and positioned, the installation efficiency is improved, and meanwhile, the phenomenon of skidding of the outer ring sleeve in the loading process after the outer ring sleeve is sleeved on the roller main body can be prevented.

The above description is only for the preferred embodiment of the present invention, and does not limit the present invention. Any technical personnel who belongs to the technical field, in the scope that does not deviate from the technical scheme of the utility model, to the technical scheme and the technical content that the utility model discloses expose do the change such as the equivalent replacement of any form or modification, all belong to the content that does not break away from the technical scheme of the utility model, still belong to within the scope of protection of the utility model.

Claims

1. The replaceable roller is characterized by comprising a roller main body and an outer ring, wherein the outer ring is detachably sleeved outside the roller main body, a plurality of limiting keys are arranged on the roller main body, a plurality of limiting key grooves are formed in the inner wall of the outer ring, and the limiting keys correspond to the limiting key grooves one by one and are clamped into the corresponding limiting key grooves.

2. The replaceable roll as claimed in claim 1, wherein a stop is further provided on the roll body, a positioning groove is provided at one end of the outer ring sleeve, the positioning groove is located on the inner wall of the outer ring sleeve, and the stop is at least partially located in the positioning groove to abut against the end of the outer ring sleeve.

3. The replaceable roll as claimed in claim 2, wherein the outer race is annular.

4. The replaceable roll as claimed in claim 3, wherein the positioning groove and the stopper are both annular, and the diameter of the positioning groove is larger than that of the stopper.

5. The replaceable roll as claimed in claim 2, wherein the stop is of integral construction with the roll body.

6. The replaceable roll as claimed in claim 2, wherein the stopper is connected to the roll body by welding.

7. The replaceable roll as claimed in claim 1, wherein the outer race is hot-set with the roll body.

8. The replaceable roll as claimed in claim 1, wherein the material of the outer race is high chromium cast steel.

9. The replaceable roll according to claim 1, wherein the limiting keys are multiple, and the multiple limiting keys are uniformly distributed along the circumferential direction of the roll main body.

10. The replaceable roller as claimed in claim 1 or 9, wherein the limiting key is a flat key or a semicircular key.