What is the production process of the slewing bearing

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There is another call in the industry called the rotor bearing; it has a wide range of applications in industrial machinery, medical machinery and other industries, and is called “the joint of the machine”. If you want to ensure the quality of rotation support, you must strictly check each production process. Next, Hengguan Xiaobian will introduce the production process of the rotary support.

The production process process of the rotary support

1. Steel raw material cutting

The raw materials often used in the rotary support bearing are the overall hard -hard carbon -chromium bearing steel. The rotary supporting circle is used on the surface hard steel, which is generally made of 50MN steel. First, the billet must be cut according to the expected size of the bearings. The cutting bearing steel is mostly used for hard alloy saws with high hardness, abrasion resistance, strength and toughness.

2. Black forging

The billet forging is to heat the billet in the heating furnace and the forging into a round cake -shaped. The purpose is to ensure the reliability and life of the bearing.

3. Forging rings

Use the roller to make the billet parts into a ring -shaped steel ring. By forging, the internal tissue of the steel can be improved, so that the steel materials can be more intensive, plastic and impactful.

4. Coarse car processing

Put the steel rings behind the ring rings into the machine tool, perform rough vehicle processing, the vehicle out of various grooves, fix the steel ring on the milling machine, cut out the teeth, and provide conditions for the processing of the later grinding machine.
5. Hot treatment

Thermal treatment is also called quenching. In popular terms, the heat treatment link is to perform high -temperature treatment of bearing and car processing circles of forging and car processing, which can affect the uniformity of carburizing in the bearing circle and improve the abrasion resistance and hardness of the bearing.

6. Open hole processing

Installing holes in the end surface of the steel ring, pay attention to determining the heart and cutting angle when opening the hole. You can choose the drilling machine, hand -held electric drill and hand -shaking diamond for operation.

7. Exquisite grinding

Experience grinding is a refined part of the bearing. The fine grinding can affect the rotation flexibility of the bearings and the surface processing accuracy of the bearings. It once again conducts a precision car on the steel ring roller surface to modify the deformation generated by the front of the Taoist processes.

8. Architecture and packaging

Assemble the processed components; the assembled finished product bearing coated rust oil, sample quality inspection, packaging packaging, and enter the storage or sales process.

The above is the production process that Xiaobian summarizes the transition support. Presumably you must have a clearer understanding of the rotary branch. If you want to maintain the good performance of the bearings and extend its service life, you must strictly control the procurement level to ensure that the quality is intact; pay more attention to inspection and maintenance during operation. If you have other questions or needs about bearing, you can leave a message or call us. Luoyang Hengguan Bearing Technology Co., Ltd. looks forward to providing you with a solution.

How to disassemble the large slewing bearing? Four ways to solve it

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Slewing bearing is a kind of large bearing with special structure. It can bear large axial load, radial load and overturning moment and other comprehensive loads at the same time. It is widely used in various industries or equipment. Many friends are not very familiar with how to disassemble large slewing bearings. Next, the editor of Hengguan will introduce the four commonly used bearing disassembly methods for you.
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1. Knock Disassembly Method
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The knocking method is used in many disassembly scenarios. Simply put, a copper rod or other soft metal material smaller than the inner diameter of the bearing is used against the shaft end (if the bearing is located at the end of the shaft), and a hand hammer is used to strike the inside of the bearing evenly and forcefully. The ring slowly dislodges the bearing. This method is simple and easy to implement, but the disadvantage is that it is easy to cause damage to the bearing, so be careful when operating, and pay attention that the impact point of the knock should not fall on the rolling body and cage of the bearing.
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2. Pull out disassembly method
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This method requires the help of a special puller, and the tool can be pulled evenly by rotating the handle to pull out the bearing. This method has better protection for the bearing, and the following points need to be paid attention to during operation:
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1. The hook of the puller should be hooked to the inner ring of the bearing. If it is hooked on the outer ring by mistake, it may cause excessive loosening or damage to the bearing.
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2. To align the screw rod with the center hole of the shaft, pay close attention to the force of the bearing during the pull-out process to avoid damage to the hook and bearing.
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3. Pay attention to prevent the hook from slipping off, and the angle of the two feet of the puller should be less than 90°
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3. Pushing and disassembling method
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This method requires the use of a press to push the bearing, the working process is stable and reliable, and generally does not damage the machine and the bearing. Note that the force point of the press should be on the center of the shaft and cannot be biased. Common presses are manual, mechanical or hydraulic.
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4. Heat treatment disassembly method
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The bearings used for disassembly of the tight fit can be heat-treated first, and then pulled out with the help of a puller. Generally, the oil heated to about 100 ℃ is poured on the bearing to be disassembled. After the bearing ring is heated and expanded, the bearing is pulled out evenly with the help of a special puller. When disassembling this method, self-protection and oil recovery should be done to prevent burns; the shaft body should be wrapped before heating to prevent the bearing from being disassembled due to thermal expansion of the shaft body.
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The above is the specific introduction of how to disassemble the large slewing bearing, I hope it can help you. Luoyang Hengguan Bearing Technology Co., Ltd. is a comprehensive entity enterprise integrating design, research and development, production, sales and service. The product quality is guaranteed. If you have other questions about bearings, you can give us We leave a message or call us, we will serve you wholeheartedly!

The effect and method of the slewing bearing lubrication

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The effect and method of the  slewing bearing lubrication
The turntable bearing is one of the large -scale bearing in the market. Many engineering machinery, equipment platforms, etc. are inseparable from the turntable bearings. We all know that the bearings must be well maintained and maintained during use, and it is important to maintain its good lubrication. So what are the effects of rotor bearing lubrication? What are the advantages and disadvantages of different lubrication? Next, I will introduce to everyone.

1. The role of the rotor bearing lubrication

1. Reduce friction and wear

The lubricating oil is filled to the embarrassment of the sets of the bearing, the rolling bodies and the holder to prevent the metal of each component from contacting each other, thereby reducing friction and wear, and maintaining the operating performance of the bearings.

2. Extend fatigue life

The lubrication of the bearing in operation is closely related to its fatigue life: If the lubrication of the rolling contact surface is good, the service life is prolonged; if the lubricating oil viscosity and the insufficient thickness of the lubricating oil film cause insufficient lubrication, the service life will be shortened.

3. Dowry friction heat and cool down

The cycle -to -oil method and other lubrication methods can be discharged by oil from the heat produced by the bearing itself or the heat generated by external transmission, which plays a cooling role to prevent the bearing excessive heat and lubricating oil itself.

4. Prevent foreign objects, etc.

Good lubrication of the rotor bearing can prevent foreign bodies from entering the bearing inside, and it also has a certain effect on preventing rust and corrosion of the bearing.
Rotor bearing
2. Method of Rotary Bearing Lubrication Method

1. Lubrication

Advantages: good oil liquidity, small internal friction coefficient, less energy consumption of overcoming friction, easy to enter the friction surface of each lubricant, better cooling effect, at the same time, you can make the impurities on the surface of friction or grinding. Metal particles take away.

Disadvantages: The thin oil lubrication method has higher requirements for sealing, and at the same time, the oil film cannot withstand large unit pressure.

2. Lubrication of thick oil

Advantages: The rotor bearing adopts a large range of adaptation to the properties of the load and the speed of motion speed by the thick oil lubrication method; in addition, it is easy to seal, lose less, and be less affected by temperature.

Disadvantages: The energy loss of the thick oil lubrication method is large, because of its poor liquidity and large internal friction coefficients. In addition, it is easy to lose lubrication performance when working at high temperature for a long time. It is necessary to do daily inspection and oil supplement replacement.

Reasons and treatment methods of abnormal noise of tower crane slewing bearing

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You should often see tower cranes on construction sites, right? It operates flexibly and has a large carrying capacity, which has made great contributions to improving the construction progress and ensuring the quality of the project. The slewing bearing is one of the commonly used bearings of many construction machinery, and it is found in tower cranes. Many friends who are engaged in the operation of tower cranes will report the problem of abnormal noise in the slewing bearing. Next, the editor of Hengguan will summarize the reasons and treatment methods for abnormal noise of tower crane slewing bearing.
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1. Reasons for abnormal noise of tower crane slewing bearing
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1. The machining accuracy of the bearing gear is not enough
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The precision of the slewing bearing gear determines the stability, accuracy and uniformity of the load distribution of the slewing bearing transmission. The higher the gear precision, the denser the contact spots on the meshing tooth surface. The normal level should be between 7 and 11. If the precision is not enough, it is easy to cause abnormal noise.
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2. The internal machining accuracy of the bearing is not enough
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The inner steel ball and raceway of the slewing bearing have low machining accuracy or quality defects, which can easily cause the collision between the rolling body and the spacer, which affects the stability of the bearing operation and also causes excessive noise.
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3. Bearing gear wear
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Due to the powerful work of the tower crane, after the slewing bearing gear is under load for a long time, small pieces of metal or strip-shaped metal iron filings will fall off near the pitch line of the tooth surface, forming pitting or gnawing teeth until the tooth shape is damaged. The abnormal noise and impact increase when the tower crane rotates.
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4. Insufficient bearing lubrication
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The lack of grease in the slewing bearing or the deterioration of the grease will cause the friction between the rolling element and the raceway to increase, the rotational resistance to increase, and the rotation to be inflexible, resulting in abnormal noise.
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2. Processing method
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1. Choose a slewing bearing with reliable quality
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To avoid the problem of abnormal sound of slewing bearing, the premise is to control the procurement. Ensure that the bearing material quality is reliable, and the gear and internal machining accuracy is up to standard, making it more flexible in operation and longer in service life.
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2. Supplement or replace grease in time
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According to the bearing instructions or relevant operating specifications, add grease in time. For special working environments such as dust, high temperature difference, and high humidity, the lubrication cycle should be shortened. As a result, the friction between the gears can be reduced, the wear speed of the gear ring gear can be slowed down, and the frictional noise of operation can be reduced.
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3. Fastening bolts
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The connection bolts between the slewing bearing and the upper and lower supports are loose or the pre-tightening force cannot meet the requirements, which will cause the rear axial clearance to increase, the rolling elements rotate under a large overturning moment, and the raceway edge is subject to large contact stress, resulting in rolling. The edge of the road is damaged, causing abnormal noise. Therefore, it is necessary to fasten the bolts in time to make them reach the specified pre-tightening force.

Causes and treatment methods of overheating of slewing bearing

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The overheating phenomenon of the slewing bearing during operation is one of the common faults of the bearing. Once the overheating phenomenon is found, it needs to be stopped in time for investigation and treatment. Improper handling will reduce the efficiency of mechanical equipment, and may cause serious damage to the bearing, increase unnecessary capital investment, and delay the construction period, which is not worth the loss. So what are the reasons for the overheating of the slewing bearing? How to deal with it? Next, the editor of Hengguan will give you a detailed introduction.
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1. The cause of overheating
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1. Poor lubrication
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Good lubrication is a necessary condition to ensure the normal operation of the bearing. If the bearing grease is insufficient or deteriorated, it will increase the friction and wear of the bearing, causing the bearing to overheat.
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2. Improper installation
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When the bearing is installed, it is required that the center line of the shaft and the bearing hole need to be coincident. If the installation is not correct, the bearing will have deflection, and torque will be generated when rotating, causing the bearing to overheat, wear, vibrate, and increase noise.
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3. Inspection and replacement are not timely
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The bearings in operation should be checked in time. If serious fatigue spalling, oxidation rust, pits, cracks, etc. are found, new bearings should be replaced in time, otherwise the bearings will be overheated, abnormal noise or even damage the mechanical equipment.
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4. Poor bearing quality or improper selection
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The slewing bearing generally works for a long time under strong stress. The accuracy, life and reliability of the main engine largely depend on the bearing. If the bearing itself is of poor quality or improperly selected at the time of purchase, its limit speed and load capacity will not match the equipment. , may cause overheating.
Slewing bearing
2. Processing method
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1. Purchase bearings with good quality and matching models
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When purchasing bearings, the quality must be strictly controlled, and factors such as the nature, size, temperature conditions, and rotation of the inner and outer rings of the bearing load should be comprehensively considered according to the equipment requirements to ensure that the model matches.
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2. Install the bearing according to the operating procedures
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When the bearing is installed, the coordination between the inner diameter of the bearing and the shaft, the outer diameter and the outer casing is very important. In addition, the center line of the shaft and the bearing hole needs to be coincident to prevent the bearing from overheating, vibration, abnormal noise, etc. caused by wear caused by improper installation.
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3. Regularly check and replenish grease
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Bearings should be regularly inspected for grease. If the lubrication is insufficient, it should be replenished in time. If the grease deteriorates, it should be replaced in time. Different types of grease cannot be mixed.
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4. Timely check the running condition of the bearing
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Timely check whether the bearing is bitten and worn, check whether there are cracks, rust, pits and other defects inside and outside the bearing, measure whether the bearing clearance exceeds the standard, and repair or replace the new bearing in time if there is an abnormality.

What is the main component of the slewing bearing ? the precautions before installation

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The slewing bearing is also called the turntable bearing, and some people call it to rotate, rounded support, which is a new type of mechanical components. As the joints in mechanical equipment, it has an important role in machine equipment. With the rapid development of the machinery industry, the application range of the rotary support is also more wide. Although the application of the rotary support is very broad, many people don’t understand it, and the Hengguan Xiaobian introduces you the main components of the rotary support and its pre-installation considerations.
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First, the main components of the slewing bearing
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1, ferrule

The slewing bearing has an inner ring and a coat, there is a circle between its internal and outer casings, and the roller is a weak link, usually the roller will be quenched, reach the corresponding depth and hardness. Falling against wear and preventing the roller from peeling.

2, rolling body

Typically, the rotary supported rolling body is made by integral hardened carbon chromium bearing steel. The existence of the rolling element makes the relative rotation and load transfer property between the inner and outer rods, which can well reduce the rotational resistance. Usually the ball on the rolling body, the roller is made of hard chrome alloy.

3, hold frame

There are three different structural forms, which are separated by isolation blocks, integral, and segmented. The cage can be separated by the rolling bodies, which can reduce friction and prevent slippery, and the role of snorting during the rotary support rotation.

Made of steel or casting aluminum alloy in the overall type and segmented cage. The isolation block is made of polyamide resin, cast aluminum alloy or the like. With the continuous development of the industry, nylon has gradually been used in the production of segmented retention.

4, seal ring

The rotary support has a seal to prevent lubricants from being lost while protecting the rotary support is not contaminated by dust and particles. The seal is made of an elastomeric material, and a lubricant with most general mineral oil and a lithium-group or calcium-based thickener.
Slewing ring

1, need to confirm the appearance before installation

Before installing the slewing support, you need to make a careful appearance check, confirm that the rotary support does not receive a relatively large damage during transport; if the customer requires quenching or other requirements, it is also confirmed that there is no soft belt mark and gear beating. Larger position tag.

2, need to clean the impurities before installation

The rotary support acts in the device to connect support, so before installation, it is necessary to confirm that the impurities on the rotary support have been cleaned, avoiding wear and failure due to the existence of impurities.

The above is a related introduction to the main components of the rotary support and the precautions before installation, I hope to help you understand the rotary support. The rotary support is small, compact, lightweight, can at the same time to withstand the torque from different directions, and the range of use is more wide. Luoyang Hengzhang Bearing Technology Co., Ltd. focuses on producing high-quality swivel support, if you have related needs, please call order.

The working principle and working way of the slewing bearing

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Slewing bearings are widely used in machinery, such as excavators, disintegrators, stackers and reclaimers, graders, road rollers, and roadheaders. Not only that, but also in new energy equipment, amusement equipment, metallurgical equipment, etc. It also has its application in China, so what is the working principle and working method of the slewing bearing? Below, the editor will take you to understand some knowledge about slewing bearings, you can learn and understand.

First, the working principle of the slewing bearing
The working principle of the slewing bearing is to move the object from sliding to rolling to reduce frictional resistance. It mainly relies on lubrication and friction to achieve the purpose of operation. Internally, it relies on the mutual friction of balls and steel rings. The friction between the bearing and other parts runs, rubs against each other, and drives the object to operate. Although it relies on friction to operate, lubrication is also indispensable. If it is used for a long time and the friction is too large, it will also affect the application of parts. Therefore, after using this kind of bearing for a period of time, it should be maintained in time. , brush some lubricating oil.

Single row ball slewing bearing 01 series
2. How the slewing bearing works

1. Point contact scrolling
The working principle of point contact rolling is mainly used for four-point contact ball slewing bearing and crossed roller slewing bearing. This working principle has higher requirements on the quality of steel balls for the combined bearing of point contact radial and axial forces, and the angle of the track should be uniform.

2. Rolling and sliding combined rolling type
The rolling-slip combined rolling working principle is mainly used for ball-column combined slewing bearings. This principle has small eccentricity and long service life, and has the advantages of a dual structure of rollers and balls.

3. Surface contact rolling and sliding combination
The working principle of surface contact rolling and sliding combination is mainly used for turntable bearings. Now the new type of turntable bearing has a compact structure and high precision, so it is suitable to use the surface contact rolling and sliding combination.

4. Surface contact rolling combination
The surface contact rolling combined working principle is mainly used for three-row roller slewing bearing, its advantage is that the contact surface is large, the bearing force is uniform and the rolling is flexible.

The above is the working principle and working method of the slewing bearing. I hope it will be helpful to you. Our Hengguan Bearing mainly deals in slewing bearings, slewing bearings, and slewing bearings. If you have any questions or needs, please contact us. Hengguan Bearing is looking forward to you. call.

Working principle and working method of slewing bearing

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The turntable bearing is widely used in mechanical applications, such as excavators, disinctures, stack assemblers, flat, road rollers, and excavators, but not only that, in new energy equipment, amusement equipment, metallurgical equipment, etc. There is also its application, then what is the working principle and working mode of the turntable bearing? Below, Xiaobian takes everyone to learn about some knowledge about turntable bearings, you can learn about it.

First, the working principle of turntable bearing
The working principle of the turntable bearing is to move the object to the object, reducing the frictional resistance, mainly relying on lubrication and friction to achieve the purpose of operation, internally, with the mutual rubbing of the ball and the steel ring, relying on the rotary support at the outside The bearing is operated with the frictional force of the other components, and frictions with each other, and the object is operated. Although it is necessary to operate with friction, it is indispensable. It has been used for a long time. The friction is too large, and it will affect the application of parts, so after a period of use, it is necessary to maintain it in time. , Brush some lubricants.

Single rolled rolling bearing 01 series
Second, the working method of turntable bearing

1, point contact rolling
Point contact rolling work is mainly used for four-point contact ball turntable bearing and cross roller turntable bearing, which with a high demand of point contact radial axial force is high, and the track is uniform.

2, sloppy combination rolling type
The rolling combination rolling working principle is mainly used in the joint rotation support of the ball column. This principle is small, long life, and has the advantages of roller and dual structure.

Is it normal for the bearing to vibrate?

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Is it normal for the bearing to vibrate? In addition to some vibrations that may exist in normal operation, the shaking of the bearing during operation may require attention, which may reflect the possible problems of the bearing. Let’s learn about it with the editor of Hengguan.

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  1. Is it normal for the bearing to feel shaking?

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Bearing shaking needs to observe the amplitude of shaking. Slight shaking may be caused by the resonance between the bearing and the machine during the operation of the equipment. Shaking within the allowable range is normal, but the vibration frequency or speed is too large, or the bearing is installed opposite to the bearing. For machinery with high precision requirements, adjustment and maintenance are required.

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The bearing vibration (acceleration) is divided into four grades: Z, Z1, Z2, and Z3; the bearing vibration (speed) is divided into four grades: V, V1, V2, and V3.

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Z and V grades are suitable for the vibration inspection of deep groove ball bearings within the scope of the standard by bearing manufacturers; Z1 and V1 grades are suitable for the inspection of bearing products with general requirements for bearing vibration; Z2 and V2 grades are suitable for Y series motors and Other motor bearings with corresponding requirements; Z3 and V3 grades are suitable for higher precision requirements when there are strict requirements for vibration.

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  1. Reasons for bearing shaking
  2. The mounting bolts are loose, causing shaking during work. In case of shaking when the slewing bearing is working, firstly check all the inner and outer ring mounting bolts immediately. Check for looseness and tighten as required.

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  1. The rigidity of the steel structure supporting the slewing bearing is not enough, and elastic deformation occurs during loading, causing the slewing bearing to shake as a whole, increasing the strength of the steel structure supporting the slewing bearing by 14 times.

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  1. Check whether the operation is overloaded. Overloading will also cause the slewing bearing to shake. Therefore, it is necessary to operate in strict accordance with the regulations.

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  1. Long-term overload operation will lead to the crushing of the raceway and the clearance is too large. If such a situation occurs, please notify the after-sales service of the slewing bearing to make adjustments to ensure the normal use of the slewing bearing. In short, in order to ensure the normal use of the slewing bearing, if shaking occurs during use, it must be stopped in time for inspection to prevent long-term shaking from causing greater damage to the slewing bearing.

Slewing bearing

Three, bearing shaking solution

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  1. Clean the bearing housing and replace with a new oil seal.

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  1. Install a protective dust cover and improve the oil seal.

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  1. Check the bearing box, adjust the support surface and adjust the gasket.

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  1. Detect the shaft diameter, select the appropriate amount of fit, and re-lock the adapter sleeve.

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  1. Replace the bearing housing with the hole diameter that meets the design requirements.

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  1. Readjust the shims so that the shaft centers are coupled on the same straight line.

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I believe that after reading the above content, you will know whether it is normal for the bearing to shake. The editor of Hengguan Bearing also introduces the reasons and solutions to the shaking. I hope it will help you. Of course, in addition to this, we Attention should be paid to the abnormal conditions encountered during the use of the bearing so as not to affect the normal use of the bearing.

Cold treatment process and role of bearing sleeve

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The cold treatment of the bearing sleeve mainly refers to a processing process after the bearing material after forging heat treatment, mainly by staying in an environment after the quenching is placed in an environment where the quench is restored for a period of time, this process is called cold treatment, and the following turntable Everyone introduces the role of the cold treatment of the bearing ring and related process.
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First, the effect of cold treatment Be Precision bearing is high in size stability; after the ferrule quenching (especially grading), the internal tissue still retains more residual austeel, which is unstable, in storage and use bearing In the process, it will continue to change, thereby changing the accuracy of the bearing. For this purpose, a cold treatment process is used, which reduces the residual bombs in the tissue and slightly improves the hardness of the part.
Tuto bearing
Second, cold treatment process and requirements
1. After quenching, stay at room temperature: After quenching, be sure to make cold treatment inside and outside the ferrule, otherwise it is easy to crack, cold to room temperature, cold treatment (generally no more than 30 minutes), otherwise it will stop the austenite The transformation of the hometown.

2, cold treatment temperature: The temperature of the cold treatment is mainly based on the martensite transition temperature MF of the steel, and the impact of cold treatment on mechanical properties and processability is considered. For GCR15 steel, cold treatment is used to use -70 ° C; when the accuracy requires less than a ferrule or device, the cold treatment temperature can be selected from -40 to -70 ° C; ultra-precision bearing, can be at -70 ° C ~ -80 ° C Cold treatment is carried out. Overcloowise temperature affects the bearing impact fatigue and contact life.

3, cold treatment insulation: Although the change in mass martensite is completed when it is cold to a certain temperature, but in order to make a batch of ferrule surfaces and the center of the center, there is a certain holding time, generally 1 to 1.5 h.

4, the cold treatment after cold treatment: After the ferrule is cold, placed in the air, and the temperature is slow to rise to the room temperature. Wenheng can’t be too fast, otherwise it is easy to crack; tempering time, otherwise the residual stress inside the ferrule can cause the ferrule crack, generally no more than 2 hours.