To put it simply, forging is to smash metal into the shape you want, and casting is to melt the metal and then re-solidify it into the shape you want. Forging is to mechanically shape metal into the shape you want. (There are two methods, cold and hot.) Casting is to melt the metal and pour it into a prepared sand mold or mold. After cooling, it solidifies into the shape you want. .

Forging is a processing method that uses a forging machine to apply pressure to a metal blank to plastically deform it to obtain a forging with certain mechanical properties, certain shape and size, and is one of the two major components of forging (forging and stamping). Through forging, defects such as as-cast looseness produced by the metal during the smelting process can be eliminated, and the microstructure can be optimized. At the same time, due to the preservation of the complete metal streamline, the mechanical properties of forgings are generally better than those of castings of the same material. For important parts with high load and severe working conditions in related machinery, forgings are mostly used in addition to rolling plates, profiles or welded parts with simple shapes.

A processing method of using a forging machine to apply pressure to a metal blank to plastically deform it to obtain a forging with certain mechanical properties, certain shape and size. One of the two major components of forging. Through forging, the as-cast looseness and welding holes of the metal can be eliminated, and the mechanical properties of forgings are generally better than those of castings of the same material. For important parts in machinery with high load and severe working conditions, forgings are mostly used in addition to rolling plates, profiles or welded parts with simple shapes.



Using impact force or pressure to deform the metal between the upper and lower abutting irons (anvil blocks) to obtain the required forgings, there are mainly two types of manual forging and mechanical forging.


The metal blank is compressed and deformed in a forging die cavity with a certain shape to obtain a forging, which can be divided into die forging, cold heading, rotary forging, extrusion, etc. According to the deformation temperature, forging can be divided into hot forging (processing temperature is higher than the recrystallization temperature of the billet metal), warm forging (lower than the recrystallization temperature) and cold forging (normal temperature). Forging materials are mainly carbon steel and alloy steel of various compositions, followed by aluminum, magnesium, titanium, copper, etc. and their alloys. The original state of the material is bar, ingot, metal powder and liquid metal. The ratio of the cross-sectional area of ​​the metal before deformation to the die cross-sectional area after deformation is called the forging ratio. Correct selection of forging ratio has a lot to do with improving product quality and reducing costs.


Forged valve bracket


Casting is a forming. After the metal is melted into liquid, it is cast into a casting cavity suitable for the shape of the part, and after it is cooled, solidified and cleaned, the processing method of the part or blank is obtained. The foundry major focuses on the metal smelting process and the control of the process during the casting process.
Forging is slow forming. The method of applying pressure, extrusion, hammering and other methods to the metal blank with a forging machine makes the metal material in the plastic state a processing method of a workpiece with a certain shape and size. Forging is plastic forming in the solid state, which can be divided into hot working and cold working, such as extrusion, drawing, pier thickening, punching, etc.

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Tower crane slewing bearing is a kind of large special structure bearing that can bear large axial load, radial load and overturning moment and other comprehensive loads at the same time. In addition, the slewing bearing itself has the characteristics of compact structure, convenient guide rotation, easy installation and easy maintenance. How to correctly install the tower crane slewing bearing, the slewing bearing manufacturer reminds you to start from the following aspects:

First, carry out anti-rust treatment on the product

Considering the harsh working conditions of tower cranes, good anti-rust treatment can maintain the performance of the slewing bearing. Before the products leave the factory, the company has taken special paint or oxidation treatment measures on the outer surface of the products. The equipment has a long durability. According to the special requirements of customers, chrome plating (TDC) or nickel plating can also be used.

tower crane slewing bearing

Second, the installation of tower crane slewing bearing

During installation, after the slewing bearing is hoisted in place, use a feeler gauge to check the flatness of the fitting plane, and the specific allowable flatness value shall be implemented in accordance with relevant regulations. If the clearance is too large, it should be re-machined. If the required flatness cannot be achieved by machining, plastic filling or partial gaskets can be used to ensure the accuracy of the installation plane and reduce vibration. In order to avoid the deformation of the slewing plate bearing after the bolt is tightened, which will affect the normal operation of the slewing plate bearing.

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The flexible bearing of harmonic reducer is a kind of bearing of harmonic reducer. It is a kind of bearing used outside the harmonic generator, which can realize the speed change requirement of large transmission ratio. Because of its special overall structure, it is installed in time is different from other types of bearings.

Assembly method of flexible bearing of harmonic reducer

Harmonic reducer flexible bearing

1. Arc fill ball groove method

This method is actually that when the ball filling angle is greater than 195°, a circular arc groove that is larger than the diameter of the steel ball is opened in the distance from the inner and outer ring ribs to the bottom diameter of the groove. The steel balls are respectively filled into the channels. The arc ball-filling groove method has low installation efficiency, high production cost, and poor quality control, because if the ball-filling groove is deep, the ferrule will be scrapped; if it is shallow, the steel balls cannot be filled. Improper grooving will greatly reduce high-speed performance and limit axial play.

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The friction disc is the main component of the tractor clutch, and the physical properties and mechanical properties of its working surface material directly affect the working performance of the clutch. So what are the materials of the clutch friction disc?

The effect of clutch friction disc


1. Transmission of rotational torque

The engine flywheel is the active part of the clutch, and the driven disc and the driven hub containing the friction plate are connected with the driven shaft by the rolling spline shaft. If the spring is clamped, the driven disc is clamped on the end surface of the flywheel of the water pump.

2. Engine torque

That is, it is transmitted to the driven disk by the friction effect between the water pump flywheel and the surface of the driven disk, and then sent to the driving wheel through the driven shaft and a series of components in the transmission system. The greater the clamping force of the spring, the greater the torque that the clutch can transmit.

Material of clutch friction disc

Friction parts are the key components of friction clutches, and the chemical properties and physical properties of the surface materials during their work immediately endanger the working characteristics of the clutch.

Common friction surface materials include powder metallurgy materials, asbestos-based materials, and rock-based materials.

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Vegetables are grown in greenhouses, some are planted directly, some are planted with seedlings, and some are planted with vertical grow racks. No matter what kind of planting method, the growth of plants is inseparable from light, so if indoors, greenhouses, plant growth racks. In order to ensure the healthy growth of the seedlings, it is necessary to use the plant supplementary light for supplementary light in the place where the high-quality light is affected. There are many types of plant fill lights. How to choose when filling light for vegetable seedlings?

When using plant fill light to fill light, you should pay attention to many issues, such as the requirements of light intensity for the growth of vegetable seedlings, such as the limitations of planting environment and space on fill light conditions.

Grow racks

The power of the plant fill light determines the light intensity, so when choosing a fill light, if the vegetable seedlings are light-loving plants, they have greater requirements for light intensity when growing, and a high-power fill light should be selected. If you are growing vegetables at home, you can choose to use LED plant fill lights. LED fill lights are small in size and are more suitable for growing environments with limited space, and LED fill lights are more energy-efficient.

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In the current enterprise development, the manual production mode has been completely replaced by mechanization, so that the entire production can be improved unprecedentedly, and the high-efficiency production process is also more standardized and unified. The advancement of technology and the popularization of mechanization have achieved the driving force for the development of many industries. The valve bag packaging machine has achieved a wonderful leap with the help of technology and has become one of the necessary equipment for commodity filling.

The valve bag packaging machine is the product of modern technology, which represents the realization and progress of global industrialization. According to the needs of the market, today’s valve bag packaging machines are divided into many small branches, and each has its own unique functions and characteristics, and the degree of automation has also been upgraded. The types of valve bag packaging machines currently on the market are: impeller type valve port Packaging machines, spiral packaging machines, pneumatic packaging machines, vacuum powder packaging machines and other products; they have unique uses in various industries, helping entrepreneurs to complete product packaging with good packaging quality and high efficiency.

The valve bag packaging machine is an automatic quantitative packaging machine designed for various fine powder or ultrafine powder materials with low bulk density, strong air affinity, and excellent or poor self-flow.

The working principle of valve bag packaging machine:

1. The valve bag packaging machine uses the motor as the power source to drive the impeller in the discharge seat to rotate smoothly to achieve uniform feeding;

2. The sensor measures the weight of the material in the bag and inputs the measurement signal into the microcomputer. When the filling weight requirement is met, the microcomputer outputs the signal, and the sealing cylinder extends into the working state to seal the discharge port;

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The compact rack is mainly used in enterprises, books, archives and other places. It has large storage capacity, large occupied area and good storage quality. In order to better preserve archive data, many companies will choose different racks according to different storage items. For example: base map rack, voucher rack, file rack. So what are the requirements for the installation environment of the dense rack? How to maintain it?

Environmental requirements for rack installation

1. The storage place must be waterproof and moisture-proof, because most of the documents are paper. If they are placed in a humid place, even if they have the functions of moisture-proof and dust-proof, they cannot be stored for a long time.

2. Generally, the suitable temperature for storing files is 14-24°C-2°C, and the relative humidity is 45%-60%-5%. The temperature and humidity within this range are better.

3. The size of the space is limited. The installation of the compact rack requires a large area. If the space is small, the compact rack cannot be placed or moved, and it is inconvenient to take documents.

4. The height of the space during the installation of the compact shelf is 30 cm higher than the height of the actual compact shelf. For example, the height of the compact shelf is usually 2.3 meters, and the height of the archive room during installation should be above 2.6 meters. Lower clearance for installation and air circulation.

Floor load-bearing requirements of the installed floor

1. When installing the rack, it is important to consider the load-bearing of the floor and the floor. The usual rack requires a load of at least 200 kilograms per square meter, and the rack manufacturer will consider the size, placement and user requirements between the documents. needs to determine its weight.

2. Therefore, you must measure it carefully during installation. If it fails to meet the load-bearing standard, you can consider how to reinforce it before you can install it. If the load-bearing of the floor or floor cannot be determined, the load-bearing test of the archives should be carried out in time.

Maintenance method of compact rack

Mobile shelving

1. Avoid collisions

After purchasing the compact rack, you should pay special attention to it. When carrying it, you should put it down gently to avoid contact with hard objects. It can’t be put together with hard objects, and it can’t be moved often after placing it, and the floor must be flat.

2. Clean and dust

When cleaning the stacker, use a cotton cloth and wipe it clean. Use a soft wool brush for dusting in the recessed and embossed patterns on dense shelves.

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In order to save space and facilitate management, plant planting has become more and more three-dimensional, and various three-dimensional soilless cultivation equipment has sprung up. Many farmers who want to engage in soilless cultivation have no idea what types of three-dimensional grow rack systems are available and how to choose them. Now let me give you a general understanding.

Cascading planter

This is the simplest form of three-dimensional soilless cultivation equipment, that is, to let the plants grow out of the ground plane, and move from the tiled state into the upper and lower stacked space to achieve the effect of intensive planting and management.The characteristics of this form are that the structure is simple and popular, the planting scale is highly flexible, and the management of water, fertilizer, light, wind and temperature is relatively convenient.

Ladder Planter

This form is to stagger the layers of the planting racks, and at the same time compress the depth of each layer.In addition, the soilless cultivation equipment is made of a ladder structure, which is more suitable for planting climbing vines or plants that need to be suspended, such as cucumbers, melons, tomatoes, and strawberries.

Grow racks

A-line planter

Two ladder-type planters are assembled back-to-back, which is the A-shaped planter. In addition to the advantages of ordinary ladder type, this three-dimensional soilless cultivation equipment has the characteristics of stable structure, large planting volume and beautiful shape. But it will be more troublesome when arranging the lighting conditions on both sides of the A word. If it is a pyramid aeroponics equipment, it is also necessary to rotate the tower body according to the position of the sun in order to take care of the planting of multiple surfaces.

Column planting stand

As the name implies, the planting frame of this form is distributed around the column on all sides, with a fan-shaped opening and a spiral upward shape. With different colors, among the three-dimensional soilless cultivation equipment, the appearance is relatively advanced.

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Calcium hydroxide equipment is mainly used to produce calcium hydroxide and other chemical products, and almost the entire production is carried out on this equipment. When feeding, you must pay attention to the relevant requirements, and there are also many things to pay attention to.


1. The calcium hydroxide equipment cannot meet the classification requirements of micropowder in the cement grinding system, mainly because the specific gravity of the micropowder is much smaller than that of the cement, so the equipment has a weak ability to identify the micropowder.

2. When entering the negative pressure operation, the grinding material is fed from the inlet of the calcium hydroxide equipment of the distributor, and meets the vortex airflow entering the primary air outlet. After being fully dispersed by the suspension dispersing mechanism, the fine powder enters the grading area through the secondary air outlet in the airflow. The resulting horizontal vortex field is graded.

calcium hydroxide equipment

3. The discharge temperature is controlled at about 45 degrees Celsius, and the water content of the discharge is controlled at about 1%. In this way, the agglomeration of finished products is prevented, and the efficiency of powder selection and the waste of slag discharge are improved.

4. The fine powder enters the rotating cage, and the negative pressure air is pumped into the subsequent dust collector from the fine powder outlet, and the finished product is collected by the dust collector. The coarse powder falls into the cone, is discharged through the coarse powder outlet, and returns to the mill for grinding again.

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The valve bag square bottom machine is the main production equipment for the production of valve bags. Its purpose is to replace the manual mass production of a valve bag production equipment. With the wider use of valve bags and the increasing demand, people urgently need to use automated production equipment to replace manual production methods. Then the manufacturer of the square bottom machine will introduce you to the purchase method of the valve bag square bottom machine. .

1. Select as needed

When purchasing a valve bag square bottom machine, we need to choose according to the type and style of the actual product produced. Now there are square bottom machines on the market that produce plastic products, non-woven bags, and kraft paper bags. They are in The knives and sealing processes used in the production process are also different, so we need to choose a square bottom machine according to the material we actually produce the valve bag.

2. Select according to equipment parameters

We need to choose according to our production needs. Among the similar square bottom machines, we select the parameters to be compared, including production speed, accuracy, capacity size, accessories, materials, after-sales service, etc. In terms of expansion, it is the same price. The faster the production speed and the greater the production capacity, the greater the economic benefits. In addition to the speed, the accuracy and reject rate in the production process of the equipment, the quality of the equipment and the services that can be provided all affect the experience of our equipment, and they are all things we need to consider.

HT120-IA Paper Tube Machine

3. On-site visit

The direct way to understand the production strength of a product is to visit the manufacturer on the spot, observe the scale of the manufacturer, the level of production technology, the production site of the employees, etc. Of course, it also includes on-the-spot observation of the operation and production capacity of the equipment, which is also the process of purchasing large-scale equipment. an important aspect. Seeing is believing is more intuitive than what we know from salespeople or brochures.

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