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.