What is the reason for the broken diameter of the support roller?

There are many reasons for the broken roller caused by the actual worker of the support roller body, sometimes the reason is obvious, and sometimes it is difficult to identify. Broken rolls may be related to the manufacturing factors of the rolls.

The hardness of the general aluminum hot rolling mill is 75-80hrc for finishing work rolls and 60-65hrc for support rolls;

The hardness of finishing work rolls is 68-72HRC, and the hardness of support rolls is 60-65HRC;

The hardness of the work roll of the cold rolling mill is 95-100hrc, the hardness of the intermediate roll is 75-80, and the hardness of the support roll is 63-68hrc;

The general indentation on the roll may be that the hardness of the foreign body is larger, and the general indentation will also be imprinted on the support roller, because the hardness of the support roller is smaller.

It is also possible that a foreign substance with less hardness forms an oxide layer on the roll surface.

The fracture of the axial strength of the support shaft may be caused by uneven force.

If there is a mistake in this machine, it is recommended that you can find relevant after-sales personnel to help you repair it in time.

If it is broken, it means that it is under a lot of force, or it is under the wrong force.

What does it mean to support Kunkun near fault? He just didn't have good quality, and he broke off as soon as he tried hard.

What is the principle reason for the breakage of the support main pipe? Because the broken should be normal, it is a software mode, and it is broken and applied normally.

What is the reason for the disability of the wheel of intellectual disability? There must be faults, there are no faults, they can't be broken, find the reason!

What is the reason for the broken diameter of the support roller? This can be seen to see if the material is not up to standard.

For this reason, you can refer to the manual or ask.

The causes of broken rolls are as follows:

1) Improper cooling of the rolls. Such as closed water rolling.

Cool water is given too early and too quickly after the end.

2) The roll is installed incorrectly, resulting in uneven force during work.

3) Due to the winding of the roller, feeding the wrong hole, and the excessive deformation of multiple rolling; Or the rolling temperature is too low, so that the deformation resistance increases, and the rolling force exceeds the strength limit of the roll.

4) The intrinsic quality of the roll is not good, the original stress is not eliminated or there are casting shrinkage holes; Rubber rolling or rolls have low strength in some places, causing stress concentrations.

5) The groove of the roll is deep, the working diameter of the roll is too small, and the strength of the roll is not enough.

All of the above situations will cause Liang Biwu to break the roll, but the broken roll is generally caused by a combination of several circumstances, and it is a process from quantitative change to qualitative change.

In order to avoid unnecessary roll breaking accidents and prolong the service life of rolls, technical operating procedures should be carefully implemented.

To strengthen technical management, it is necessary to seriously analyze the causes of each broken roll accident in a timely manner and sum up lessons and lessons.

Roll breakage refers to the phenomenon of roll breaking due to some reason in the rolling process, that is, roll breakage. Once this phenomenon occurs, it will seriously affect the rolling quality, and the product after rolling looks like the surface is covered with traces to the naked eye, causing great losses to the production process, therefore, the cause of the roll breaking must be found out in time, and the countermeasures are hanging. There are two main types of causes of roll breakage:

One is the external cause of the roll, the main reasons are: the surface of the roll is physically damaged, and the roll is disassembled and assembled according to the shape and size; The rolling pressure is too large, and the strength of the roll is not enough to withstand such a large rolling hardness; The tightness parameter of the roll surface is incorrect when it is unloaded, which is not conducive to the heat dissipation of the roll. The other type is the internal cause of the roll, the main reasons are:

The equipment applied during rolling is unreasonable and cannot meet the needs of material rolling; In the roll, the mandrel can not bear the large rolling load; Insufficient support of the roll mandrel support system; The roll mandrel material yambust does not meet the requirements; The installation technology of mandrel pipeline, flow pipeline and cooling pipeline is unreasonable. In order to effectively prevent the occurrence of roll breakage accidents, the following principles should be followed: First, fully grasp the rolling principle and its requirements, and ensure that the roll assembly and adjustment meet the requirements.

The second is to formulate strict procedures to avoid disorder as much as possible. The third is to give full play to the latest and highest level of equipment and technology, and use suitable roll mandrel, mandrel sheath, roll making materials, rolling hardness and no-load tightness. Fourth, the roll should be checked regularly, and if any problems are found, they should be dealt with in time to keep the roll body normal.

Fifth, regularly check the roll tightness parameters and the selection of materials to ensure the correct use of parameters. In addition, the use conditions of the air answering equipment should be strictly controlled, the safety factor in the rolling process should be increased, the reliability of the equipment should be ensured, and it should be improved to the best efficiency level. In summary, in order to effectively solve the problem of roll breakage, it is necessary to establish a perfect rolling system, clarify the standards, and pay attention to the roll adjustment in actual operation, which helps to improve product quality, safety and reliability, and permanent use.

Hello dear! We'll be happy to answer for you. There are two main causes of roll breakage as follows:

External causes and internal causes. External causes include surface damage, incorrect tightness parameters, unreasonable equipment, etc.; The internal reasons include unreasonable equipment, unreasonable mandrel materials, unreasonable mandrel pipeline installation technology, etc. To prevent roll breakage, the following principles should be followed:

Master the principles and requirements of rolling, formulate strict procedures, perform the latest and highest level, regularly inspect and deal with problems, select appropriate roll mandrels, production materials and hardness, etc. Hello! If you have any questions, you can answer them for you!

You can also explain your situation in detail, so that I can better answer for you!

Kiss! Hello, happy to answer your <>

The reasons for the breakage of the pro-roll are as follows: improper cooling of the roll and incorrect installation of the roll, resulting in uneven force during work due to the winding of the tung burning roll, feeding the wrong hole, and multiple rolling: the temperature of the rolling piece is too low, which increases the deformation resistance, and the rolling force exceeds the strength limit of the roll

The internal quality of the roll is not good, the original stress is not eliminated or there are casting shrinkage holes: the strength of the roll is low in some places, resulting in the stress concentration The working diameter of the roll is too small, and the strength of the roll is not enough to expand the knowledge What is the reason for the cracking of the printing roller? Causes of roll breakage:

1. Brittle fracture, the shape of the fracture of this kind of roll is relatively flat, and the surface of the roll body around the fracture is relatively neat: 2. Ductile fracture, the shape of this kind of rolled spoke fracture is mostly present"Mushroom heads"Shape, the roller body near the fracture is crushed into a crushed and broken shape. Comparing the two, it was found that the broken form of the broken roll in this broken roll accident was ductile fracture.

Both brittle fracture and ductile fracture are caused by roll stress exceeding core strength. The cause is related to the residual stress of the roll itself, the mechanical stress during rolling and the thermal stress of the roll, especially when the temperature difference between the surface and the core of the roll body is large. This temperature difference can be caused by poor roll cooling, interruption of cooling, or overheating of the roll surface at the start of a new rolling cycle.

Hope mine can help you <>

Do you have any other questions?

Summary. Hello, it is a pleasure to serve you, here for you to inquire about the reason for the interruption of the roll in the rolling includes two aspects: (1) Internal reasons:

Defects in the material or manufacturing quality of the rolls, such as inclusions, sand holes, component segregation, cracks and other defects in the rolls; (2) External reasons: unreasonable process conditions and usage, such as stress concentration caused by too small corner radius at the transition between size and shape, excessive rolling pressure or rolling moment, etc.

Hello, I am glad to serve you, here for you to inquire about the reasons for the interruption of the roll in the rolling, including two aspects: (1) Internal reasons: defects in the material or manufacturing quality of the roll, such as defects in the roll, such as defects such as slippery inclusions, sand holes, component segregation, cracks and other defects in the roll; (2) Extrinsic causes:

The process conditions and use conditions are unreasonable, such as the radius of the fillet at the transition between size and shape is too small, resulting in stress concentration, and the rolling pressure or rolling torque is too large.

Hello, what happened?

Broken rolls, you see what causes this.

It's a broken roll, right?

Well, analyze what the reasons are.

Hello is a pleasure to serve you, here for you to inquire, the reasons for the broken rolls are as follows: 1The surface of the roll is seriously worn, and the surface hardness of the roll is reduced, which can not bear the load of the rolling judgment, resulting in the broken roll.

2.The heat treatment of the surface of the rolling roll is poor, the heat treatment temperature is too low or the time is too short, and the surface hardness of the roll is not enough, which can not bear the rolling load, resulting in the broken roll. 3.

Roll surface defects, there are cracks, porosity and other defects on the surface of the roll, which cannot withstand the rolling load, resulting in broken rolls. 4.The surface of the roll is polluted, and there are oil stains and water stains on the surface of the rolls, which affect the rolling quality and lead to broken rolls.

5.The crystalline structure on the surface of the roll is uneven, and the crystallization on the surface of the roll is uneven, which affects the rolling quality and leads to the broken roll.

Pro, I'm glad to answer for you, the following is the answer to your query, I hope it will help you, and the reasons for the broken roll are several to the sock ruler: 1Material Issues:

Improper roll material or poor material quality may cause the roll to break. 2.Manufacturing Process Issues:

Poor manufacturing process of rolls, such as low machining accuracy, poor surface quality, improper heat treatment, etc., can lead to roll breakage. 3.Usage Condition Questions:

During the use of the roll, if it is subjected to excessive impact force or torque, or if the blind ruler is subjected to excessive temperature or pressure, it may cause the roll to break. 4.Maintenance Issues:

During the use of the roll, if the grinding is high and there is no maintenance for a long time, such as not replacing the lubricating oil and cleaning up impurities in time, it may also lead to roll breakage. Therefore, in order to avoid roll breakage, it is necessary to choose high-quality roll materials, adopt excellent manufacturing processes, use rolls reasonably, and carry out regular maintenance. The above is all my reply, I hope it can help you, I wish you a happy life.

The surface baking oil treatment is carried out on the wear part of the end seal of the rolling mill support roller, and then the surface grinding is carried out on the worn part. The repaired surface was cleaned with absolute ethanol, the Soray carbon nanopolymer material was blended proportionally, applied to the repaired surface, the material was cured, the repaired surface was measured after the material was cured, and the repaired surface was reground with an oil stone to ensure the flatness of the repaired surface.

In the rolling process of the rolling mill, due to the lack of soaking of the support roll in the rolling cooling water under the rolling mill, it is easy to cause corrosion of the end seal position of the support roller, and the surface of the end face after corrosion is uneven, resulting in the aggravation of the end seal wear, and the cooling water enters the bearing position of the support roll after the seal wear, resulting in corrosion and wear of the bearing.

Mill Notes.

When using a cold rolling mill, the relevant technical parameters should fully meet the requirements and should not be operated with load.

The drum shall not be seriously worn, and should be replaced in time if it is found to be worn and hail.

During the whole rolling process, if the wear of the roll affects the surface quality, source pin size and accuracy of the wound part, the roll should be replaced immediately, and the operation of the roll should be guaranteed to start for 2-3 minutes after the roll is replaced.