Forging is the use of forging pressure on metal blank products by forging machines to plastically deform the processed forgings to achieve specific mechanical properties, shapes and sizes. This is an important metal plastic processing method adopted by many forging manufacturers. Many people know about forging, but they don’t know much about the forging process. Today, GOLD EMPEROR FORGING, a forging manufacturer, will share with you some common forging processes.

Classification according to forging temperature:

First of all, the forging process can be classified according to the forging temperature, commonly used are hot forging, warm forging and cold forging.

Classification according to forming principle:

Secondly, we can also divide the forging process into free forging, die forging, ring rolling and special forging according to the forming principle of forgings.

forging process

1. Free forging of forging process

Using simple universal tools, or directly applying external force to the blank between the upper and lower anvils of the forging equipment, the blank is deformed, and the processing method of the forging to obtain the required geometric shape and internal quality is free forging. Forgings produced by the free forging method can be called free forgings. Free forging is mostly used to produce small batches of forgings. We can use forging equipment such as forging hammers and hydraulic presses to form and process the blanks to obtain qualified forgings. The basic processes of free forging include upsetting, drawing, punching, cutting, bending, torsion, offset and forging. Free forging is all hot forging.

2. Die forging of forging process.

Die forging can be divided into open die forging and closed die forging. After the metal blank is compressed and deformed in a forging die cavity with a certain shape, the required forgings can be obtained. Die forging is mostly used to produce important light and large-scale parts.

Die forging can be divided into hot forging, warm forging and cold forging. In the future, warm forging and cold forging will use more die forging processes, which are more difficult to forge than other forging methods, and can better reflect the forging technology level of forging manufacturers.

According to forging materials, die forging can also be divided into ferrous metal die forging using ferrous metals such as carbon steel, non-ferrous metal die forging using non-ferrous metals such as copper and aluminum, and powder product forming with powder metallurgy materials.

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The excavator slewing bearing is one of the important parts of the excavator. Whether the slewing bearing can be properly disassembled will greatly affect the normal operation of the excavator. So, do you know how to properly disassemble and assemble the excavator slewing bearing?

1. Installation method of excavator slewing bearing

(1) Installation plane

Before installing the excavator slewing bearing, it is necessary to check the mark and certificate to ensure that the model of the slewing bearing used is correct. If there are welding beads, burrs, paint residues, etc. on the surface of the excavator slewing bearing , it should be removed in time. Make sure that the cleaning solvent does not enter the inside of the slewing bearing, and the solvent used cannot damage the sealing material of the slewing bearing. When installing, make sure that the installation surface is dry.

excavator slewing bearing

(2) Mounting the support

The roughness of the mounting surface of the mounting support shall be controlled within the allowable range and shall not exceed the standard value range.

(3) Positioning

The inner and outer raceways of the slewing bearing are equipped with a soft belt, which should be placed on both sides of the main load surface, that is, 90 degrees away from the main load area, and the soft belt is blocked or marked with an S mark.

(4) Check

When the installation is completed, it should be checked (usually with a feeler gauge) whether the slewing bearing matches the installation surface. If the match is not good, it should be filled with suitable materials. After the excavator slewing bearing is installed, the bracket is prohibited from welding.

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High precision is the main feature of crossed roller bearings different from ordinary bearings. Therefore, in the process of use, more attention should be paid to avoid affecting the working life of the bearing.

Correct use of crossed roller bearings is an important condition for reducing bearing failures and extending bearing life, so how to use crossed roller bearings correctly?

The correct use of crossed roller bearings is mainly divided into two aspects: correct installation and reasonable lubrication.

1. How to install the crossed roller bearing correctly?

(1) Before installing the crossed roller bearing, make sure that the bearing is clean and free of impurities.

(2) When installing, do not tap the bearing with your hands or other tools. It is recommended to use a special tool to press the bearing straight and evenly.

(3) When the seat ring of the crossed roller bearing is loose with the seat hole, it is recommended not to use the method of pockmarking or padding the surface, and continue to use the bearing. At this time, the seat hole should be repaired, or directly Replace the crossed roller bearings.

(4) When disassembling the crossed roller bearing, use a suitable tool to pull out the bearing, and do not hit the crossed roller bearing with a chisel, hand hammer, etc.


crossed roller bearings


2. How to lubricate the cross roller bearing reasonably?

When lubricating crossed roller bearings, the commonly used lubricants are lubricating oil and grease. The two lubricants are used in slightly different scenarios. When the peripheral speed of the shaft is less than 4-5m/s, or the parts of the car that cannot be lubricated with lubricating oil, grease will be used for lubrication. The advantage of using grease lubrication is that the sealing structure is simple, the grease is not easy to lose, and it is not affected by the temperature, and the grease can be used for a longer time.

Crossed roller bearings with high speed and high working environment temperature need to be lubricated with lubricating oil. The advantage of using lubricating oil is that the frictional resistance is smaller and the heat can be dissipated in time. The brand and model of the lubricating oil should be selected according to the requirements of the manual, and should be replaced in time according to the maintenance cycle of the machine. Before replacing the new lubricating oil, the old oil should be released, and the When cleaning the mechanism, the amount of lubricating oil used should be in accordance with the specified marking line, or the same as the oil filling port, and no more should be added.

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Bottom paste machine is a device used to produce valve pockets. It is usually used together with drum making machine. Bottom paste machine is mainly designed and manufactured by photoelectric, electromechanical and pneumatic integration technology. The working process is mainly controlled by photoelectric PLC automatic control system program. Finish.

The bottom gluing machine is mainly responsible for unwinding and overprinting the bag body of the valve pocket, and the bottom gluing machine is responsible for the sealing of the valve pocket. Glue, turn over the bottom of the bag and other processes to jointly produce the valve bag. The bottom paste machine can realize automatic feeding, gluing, transportation and other processes, instead of manual operation, which greatly improves the production efficiency. At the same time, it can be more convenient and save some raw materials.

Because the bottom paste machine is completed by PLC photoelectric program automatic control system, its feeding speed will not be limited by the structure, and it will change with the speed up and down of the frequency modulation motor.

Bottom paste machine

The installation and debugging steps of the bottom paste machine are summarized as follows:

1. Before installing the bottom gluing machine, you should carefully check the work order and samples, determine the glue used for the gluing box, and prepare it;

2. Adjust the width of the bottom baffle to be pasted, the two sides should be parallel, and just put down the semi-finished color box to be produced, the distance between the two side baffles is less than 1mm from the color box, and then adjust the limit bolts to ensure that each product to be pasted passes smoothly. and no fetters appear;

3. Adjust the slope and height of the bracket in the bottom area to be pasted to ensure that the pasted products can pass smoothly without other obstacles. After pressing, adjust the auxiliary guide rail and flow wheel to make the size suitable for the specifications of the color box to be pasted;

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High pressure roller mill is a new type of grinding equipment developed on the basis of roller press for cement in recent years. Mines increase the specific surface area for fine grinding. The high pressure roller mill has the characteristics of high production efficiency, large crushing ratio , low power consumption, significant energy saving and convenient maintenance. For the operator of the high pressure roller mill, as long as the clinker can understand the working principle of the high pressure roller mill, the operation of the high pressure roller mill can be more handy, then do you know what the working principle of the high pressure roller mill is? What principles will be followed when it smashes materials?

high pressure grinding rolls

The working principle of high pressure roller mill

The high pressure roller mill is the same as the roller crusher in that there are two working rollers, but the working principles of the two are different. The high pressure roller mill is mainly composed of frame, extrusion roller, transmission device and feeding device. The squeezing roller is composed of a movable squeezing roller and a fixed squeezing roller, the two rollers have the same diameter, the axes are parallel to each other, and there is a certain gap between each other. When the high-pressure roller mill starts the motor, the roller shaft starts to rotate under the drive of the motor. At the same time, the movable roller is squeezed by the continuous thrust of the hydraulic cylinder, and the reaction force generated by the extrusion of the material acts on the fixed Can rotate at the same speed and in the opposite direction. When the material falls between the two extrusion rollers from the feeding port, it is crushed by the two rollers and squeezed into a dense roller c take for discharge.

The pulverization principle of high pressure roller mill

Compared with the traditional pulverization technology, the pulverization of the high-pressure roller mill is mostly quasi-static pressure pulverization. This pulverization method saves 30% energy consumption compared with the impact pulverization method, and the high-pressure roller mill can also pulverize the material layer.

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Calcium hydroxide production line is a kind of equipment that makes calcium hydroxide from powdered calcium such as quicklime. Therefore, understand the specific steps of the operation procedures of calcium hydroxide production line, learn how to better operate calcium hydroxide production line and calcium hydroxide production line The key points of the operation procedures are the basic requirements for operators of each calcium hydroxide production line.

Specific measures for the operation procedures of calcium hydroxide production line

1. Use a machine to crush the quicklime to a size of about 10-40 mm, and then send it to the calcium oxide storage tank through a bucket elevator.

2. During the production process, the calcium oxide in the silo enters the first-level slaked lime digester through the weighing system. After adding water, it is stirred at a low speed with stirring. During this process, the calcium oxide undergoes a chemical reaction to complete the preliminary digestion and classification.

3. Then enter the secondary and tertiary digesters to complete the digestion process.

calcium hydroxide production line

4. After the digested lime is naturally decomposed, it is screened through the screen to obtain suitable specifications, and then sent to the bucket elevator by the screw conveyor, and then sent to the screen classifier by the bucket elevator for re-screening and rejection . impurities to obtain qualified refined slaked lime.

5. Refined slaked lime is transported to the bucket elevator through the finished product conveyor, enters the finished calcium hydroxide silo, and then is packaged according to customer requirements.

How to better operate the calcium hydroxide production line

In order to use the calcium hydroxide production line proficiently, the operator needs to undergo special training. In addition to the basic equipment operation, we also need to have an understanding of the theoretical knowledge and equipment maintenance of the calcium hydroxide production line.

When learning the theory of the calcium hydroxide production line, we mainly understand the working principle of the calcium hydroxide production line, the structural composition and key components of the equipment, and secondly, we also need to understand the finished calcium hydroxide products, such as what kind of calcium hydroxide is qualified product, what are its characteristics, etc.

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Between the tractor’s engine and the gearbox, there is a key component that can be used to separate the power from the engine crankshaft to realize the tractor’s parking and shifting. This is the protagonist of our article today: the tractor clutch, the overload protection function of the tractor clutch, can Make the starting of the tractor more stable.

As we all know, the clutch transmits torque by friction. The longer it is used, the more serious the friction damage will be. However, in the normal use of the tractor, the use of the tractor clutch is very frequent. If you do not pay attention to the tractor clutch repair, once the parts are worn out , resulting in the inability to transmit torque reliably, which will affect the normal use of the tractor. Therefore, we need to regularly troubleshoot the tractor clutch and deal with possible problems in a timely manner. Here, we will briefly talk about the tractor. When the clutch is repaired, the maintenance points of each component.

tractor clutch

1. Maintenance of tractor clutch drive plate

The active disc of the tractor clutch, including the clutch pressure plate and the intermediate pressure plate, many manufacturers will use high-quality gray cast iron or ductile iron as the main raw material for these parts. The main damages of the active disc are mostly wear, scratches, burns and cracks on the friction surface; warpage and deformation of the friction surface; breakage of the lugs of the very engaging clutch, and increase of the bearing clearance due to wear; The pin fit gap is loose due to wear, the clutch cover is deformed or cracked, and the window hole is worn.

When the tractor clutch is repaired, the detection of the damage of the active disc is mainly based on visual inspection. The maintenance of the active disc mainly includes the following two points:

(1) If the clutch pressure plate has cracks, defects, or the thickness after grinding is smaller than the limit size, it should be replaced with new parts in time. If there are problems such as ablation, cracking or wear groove depth exceeding 0.5 mm on the surface, or when the plane tolerance exceeds the service limit, the clutch pressure plate can still be used after being smoothed by polishing.

(2) When the matching clearance between the driving disc and the transmission pin is greater than 1.00-1.50 mm, it should be repaired in time.

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In mining operations, vibrating screen is one of the screening equipment that is often used. Nowadays, most of the vibrating screens on the market are linear vibrating screens and circular vibrating screens. These two types of vibrating screens can also be divided into various types according to the screening materials, usage scenarios and output. The output corresponding to the model is basically different. Therefore, the understanding of the vibrating screen model can be directly started from the circular vibrating screen and the linear vibrating screen.

1. Circular vibrating screen

The circular vibrating screen, as the name implies, has a circular running track. Therefore, when the material is screened on the circular vibrating screen, it performs circular motion, which is a new type of multi-layer vibrating screen. Circular vibrating screen is often used in quarries to screen sand and gravel materials due to its fast screening speed, high work efficiency, simple structure, reliable operation and low noise, and of course it can also be used in coal preparation, mineral processing and other industries.

YK series is the most commonly used circular vibrating screen at present. The circular vibrating screen of this series is named according to the number of screen layers and screen size, such as 2YK1548. The motion trajectory is similar to a circle, 15 represents the width of the screen, and 48 represents the length of the screen. Therefore, the meaning of this model refers to a two-layer circular vibrating screen with a screen width of 1500mm and a length of 4800mm. Generally, several layers of sieves can produce several kinds of finished products, and the top layer is the return material.

The processing capacity of YK series circular vibrating screen is between 12-720m/h. The larger the model number, the wider the screen width and the longer the length, and the higher the vibrating screen output. The mesh size of the screen can be determined according to the feeding size of the screening material.


Commonly used circular vibrating screen models:

2YK1230, 2-layer screen, the screen area is 7.2㎡, and the processing capacity is 12-78m/h;

3YK1230, 3-layer screen, the screen area is 10.8㎡, and the processing capacity is 13-80m/h;

2YK1237, 2-layer screen, the screen area is 8.88㎡, and the processing capacity is 15-86m/h;

3YK1237, 3-layer screen, the screen area is 13.32㎡, and the processing capacity is 16-90m/h;

2YK1548, 2-layer screen, the screen area is 14.4㎡, and the processing capacity is 22.5-162m/h;

3YK1548, 3-layer screen, the screen area is 21.6㎡, and the processing capacity is 22.5-162m/h;

4YK1548, 4-layer screen, the screen area is 28.8㎡, and the processing capacity is 22.5-162m/h.

2. Linear vibrating screen

The characteristics of the linear vibrating screen are high efficiency, simple structure, convenient maintenance, low power consumption, and no dust spillage during operation. It has good screening effect in dry and wet classification and dehydration of medium and fine materials. Therefore, this type of vibrating screen is widely used in light industry, metallurgy, coal and other industries.

When the linear vibrating screen is working, its power source is the vibration of the vibration motor. Under the combined action of the material’s own gravity and the exciting force, the material is thrown up on the screen surface and moves forward in a straight line, and then is screened out through the screen. Various specifications of materials, different specifications of materials, corresponding to different specifications of the discharge port.

The processing capacity of the linear vibrating screen is generally between 10-600t/h, the feeding particle size is not more than 300mm, the screening particle size is relatively fine, and the maximum screening mesh number is 400 mesh, which can screen out 7 kinds of materials with different particle sizes.

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Concrete mixer trucks are commonly used construction vehicles on construction sites. In terms of maintenance and repair, in addition to meeting the requirements of relevant departments, it is also necessary to do a good job in the maintenance of concrete mixer trucks based on the actual situation of the vehicle.

Maintenance measures for concrete mixer trucks include:

1. Before the concrete mixer truck runs, it is necessary to conduct a comprehensive inspection of the vehicle, mainly to judge whether the components are normal and reliable, whether the bolt connections are tight, and whether the operation is flexible.

2. Whether the lubrication points of various parts are lubricated in time, and whether the refueling places are kept clean.

3. Check whether the hydraulic system and pneumatic system pipelines are not tightly sealed, worn, oil leakage, air leakage, etc. If there is any problem, it should be eliminated in time.

Concrete mixer truck

4. The hydraulic pump, hydraulic motor, deceleration bender and other components of the concrete mixer truck should be regularly inspected and maintained according to the requirements of the product manual.

5. Regularly check the operation of the mixing blades of the mixer truck. When there is wear, it should be repaired in time.

6. According to the different service life of the concrete mixer truck, the maintenance of the reducer should be carried out according to the following steps:

(1) Oil change: When the reducer is used for the first time, the oil needs to be changed after 500 hours. After that, the oil should be changed every 1500 hours of operation. After the reducer has been used for one year, no matter how long it has been working, the oil should be changed.

(2) Oil products: The reducers used in concrete mixer trucks are mostly imported reducers, and the gear oil used is mostly GL-5 gear oil for heavy vehicles, with a viscosity grade of 85w/140.

(3) Recommendation: When changing the oil, make sure that the oil temperature is around 60 degrees. After the oil change is completed, it is necessary to check whether the connecting bolts are still tightened. The oil level needs to be checked weekly.

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The body of the oil tank truck can be full of flammable materials. If you don’t pay attention to transportation safety, it will bring disaster! The following are the precautions for tanker transportation shared by tanker sales manufacturers. Let’s take a look at it together.

Prevents fires and explosions caused by electrical sparks

(1) All kinds of electrical equipment used in the oil depot and all workplaces must be explosion-proof, the installation must meet the safety requirements, and the wires must not be broken, exposed or short-circuited.

(2) Over the oil depot, it is strictly forbidden to cross high-voltage wires. The distance between the oil storage area and the barreled light oil warehouse and the electric wire must be more than 1.5 times the length of the pole.

(3) For the rails leading to the oil depot, an insulating baffle must be installed in front of the inlet to prevent the electric sparks from flowing into the oil depot from the rails from the external power supply.

oil tank truck

Precautions for Controlling Combustibles

(1) It is necessary to prevent oil spillage from the oil storage container of the tank truck. The running, running, dripping, leaking, and oil spills that occur in the operation of loading and unloading oil products in the tanker should be promptly removed and dealt with.

(2) After the oil tanker unloads the goods, it is strictly forbidden to pour oil, sludge, waste oil into the sewer for discharge, and should be collected and placed in the designated place properly handle.

(3) All flammable substances should be removed from the vicinity of buildings such as oil tanks, warehouses, pump rooms, oil distribution rooms, and oil blending workshops.

(4) Oil-stained cotton yarn, oiled rags, oiled gloves, oiled paper, etc. used for oil tanker maintenance and maintenance should be placed in a covered iron bucket outside the workshop and removed in time.

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