1. The shaft body is complete.
It mainly includes axle body, brake bottom plate, spherical bearing seat, air chamber seat, etc., which is located in the central position of the axle and connects the two sides of wheel ends. It is a kind of semi-finished axle.
The axle body, that is, the owners commonly say the bridge rod, both ends of the wheel end assembly connected to the wheel, the middle through the suspension system connected to the frame, the top of the frame is the main position of the loading of goods, therefore, the strength of the axle heavy load performance, directly determines the size of the semi-trailer bearing capacity, is also an essential performance parameter for the owners to choose the axle products.
2. Camshaft assembly
It mainly includes camshaft, camshaft head washer, CAM shaft bushing, camshaft skeleton oil seal, camshaft washer, camshaft retaining ring, spherical bearing bolts and nuts, spherical bearings, oil cup cover, etc.
3. Brake assembly
It mainly includes brake shoe roller, brake shoe return spring, brake shoe spring, brake shoe support, spring fixed pin, brake shoe, brake friction plate and so on.
For drum axle, brake shoe is the main friction couple, in addition to have the required strength and stiffness, but also as far as possible to have a strong and stable friction coefficient, and appropriate wear resistance, heat resistance, heat dissipation and heat capacity.
4. Wheel end assembly
It mainly includes hub caps, hub cap washers, bearings, hub bolts and nuts, hub, brake drums, hub oil seals, dust caps, grease, etc.
Wheel end assembly is the main part of the axle that needs regular maintenance and maintenance. Broadly speaking, every 50,000 kilometers of the trailer, it is necessary to do a maintenance of the hub bearing, to ensure that the bearing, hub and others maintain excellent performance output, maintenance-free axle maintenance cycle can reach 30W or 50W kilometers.
Although the rear axle of the semi-trailer is simple in appearance, the number of parts is relatively large and the composition is relatively complex. The problem of anyone of the parts, such as unqualified quality or non-standard installation, may have a direct impact on the overall performance of the axle, and even cause serious accidents such as broken shaft, shaft head fire, tire flying out, brake failure and vehicle lying down.
In order to adequately guarantee the performance and quality of the axle, what key technologies or processes do a qualified axle factory need to have? Next, take the axle as an example to give you a brief introduction.
1, "one piece" heat treatment molding
Heat treatment and forming process are usually inseparable. The raw material selected by Darong Axle is 20Mn2 high-strength alloy seamless steel pipe. Through "one-piece" heat treatment, the raw material is heated to a given temperature and maintained for a certain time to reduce the hardness and improve the plasticity of the raw material. Then, the shaft beam and shaft head are directly created from a complete steel pipe through the forming process, and then cooled with the selected speed and method. To obtain the desired microstructure and mechanical properties.
Different from the traditional "three-piece" shaft body, the shaft beam and shaft head of the axle formed by "one-piece" heat treatment are naturally integrated, without additional manual welding, which can not only completely avoid welding deformation, ensure the accuracy and parameters of the shaft body, but also reduce the weight of the shaft body, enhance the connection strength between the shaft head and shaft beam, and solve the deformation and bending problems of the axle under the condition of extreme strength transportation.
2. Strengthening and grinding of shaft head
If heat treatment is to "strengthen the body" of the axle, in order to obtain the internal stable performance, then precision grinding is like the appearance modification, in order to obtain the external processing accuracy.
As we all understand, if a steep building is to be built steadily and strong, the foundation must be laid nicely. Shaft head grinding is like laying the foundation. No matter what process is boring, drilling, milling keyway, etc., only when the processing parameters, size, precision and so on are mastered, the bearing, hub, and brake drum installed on the shaft head can play a stable performance.
In addition to accuracy, the strength of the shaft head is also critical. Axle head intermediate frequency strengthening process is specially added, especially for the bearing connection part of the strengthening process, further improve its service strength, to ensure that the performance output is more stable at high frequency speed, prolong the service life of axle.
3. High standard assembly line
Assembly is the most tedious process on the axle production line, which involves dozens of kinds of parts, the number of hundreds, anyone of which fails to meet the specified installation standards, will have an immeasurable impact on the performance of the axle.
In order to guarantee the quality of finished products, the key components of axle assembly, such as brake drum, hub and bearing, are supplied by domestic strength manufacturers and have been tested by multiple quality, so that the performance output is more stable. The assembly line has a high degree of automation, 100% online monitoring, assembly parameters and parts can be traced, stable and reliable quality, and has lengthy service life, lengthy maintenance cycle, convenient maintenance and other characteristics.
There's more to a semi rear axle than meets the eye
A decent horse deserves a decent saddle, as the saying goes, and the same applies to semi-trailers. For semi-trailer, axle is a very key part, related to the bearing, braking and driving of the vehicle, the choice of axle, for the stability, safety and economy of the vehicle is extremely crucial.
In this article, Top semi trailer manufacturers will make a detailed analysis of the rear axle of the trailer, introducing the various components of the axle, as well as the key technologies and processes in the production process of the trailer bridge.
General drum axle structure diagram
Above is a simple structure diagram of a common drum axle, from which we can distinctly see the main components of the axle and their positions. Broadly speaking, the trailer rear axle is mainly composed of shaft body, camshaft assembly, brake assembly, shaft end assembly and cotter pin, adjusting arm, all kinds of washers, nuts and bolts.
1. The shaft body is complete.
It mainly includes axle body, brake bottom plate, spherical bearing seat, air chamber seat, etc., which is located in the central position of the axle and connects the two sides of wheel ends. It is a kind of semi-finished axle.
The axle body, that is, the owners commonly say the bridge rod, both ends of the wheel end assembly connected to the wheel, the middle through the suspension system connected to the frame, the top of the frame is the main position of the loading of goods, therefore, the strength of the axle heavy load performance, directly determines the size of the semi-trailer bearing capacity, is also an essential performance parameter for the owners to choose the axle products.
2. Camshaft assembly
It mainly includes camshaft, camshaft head washer, CAM shaft bushing, camshaft skeleton oil seal, camshaft washer, camshaft retaining ring, spherical bearing bolts and nuts, spherical bearings, oil cup cover, etc.
3. Brake assembly
It mainly includes brake shoe roller, brake shoe return spring, brake shoe spring, brake shoe support, spring fixed pin, brake shoe, brake friction plate and so on.
For drum axle, brake shoe is the main friction couple, in addition to have the required strength and stiffness, but also as far as possible to have a strong and stable friction coefficient, and appropriate wear resistance, heat resistance, heat dissipation and heat capacity.
4. Wheel end assembly
It mainly includes hub caps, hub cap washers, bearings, hub bolts and nuts, hub, brake drums, hub oil seals, dust caps, grease, etc.
Wheel end assembly is the main part of the axle that needs regular maintenance and maintenance. Broadly speaking, every 50,000 kilometers of the trailer, it is necessary to do a maintenance of the hub bearing, to ensure that the bearing, hub and others maintain excellent performance output, maintenance-free axle maintenance cycle can reach 30W or 50W kilometers.
Although the rear axle of the semi-trailer is simple in appearance, the number of parts is relatively large and the composition is relatively complex. The problem of anyone of the parts, such as unqualified quality or non-standard installation, may have a direct impact on the overall performance of the axle, and even cause serious accidents such as broken shaft, shaft head fire, tire flying out, brake failure and vehicle lying down.
In order to adequately guarantee the performance and quality of the axle, what key technologies or processes do a qualified axle factory need to have? Next, take the axle as an example to give you a brief introduction.
1, "one piece" heat treatment molding
Heat treatment and forming process are usually inseparable. The raw material selected by Darong Axle is 20Mn2 high-strength alloy seamless steel pipe. Through "one-piece" heat treatment, the raw material is heated to a given temperature and maintained for a certain time to reduce the hardness and improve the plasticity of the raw material. Then, the shaft beam and shaft head are directly created from a complete steel pipe through the forming process, and then cooled with the selected speed and method. To obtain the desired microstructure and mechanical properties.
Different from the traditional "three-piece" shaft body, the shaft beam and shaft head of the axle formed by "one-piece" heat treatment are naturally integrated, without additional manual welding, which can not only completely avoid welding deformation, ensure the accuracy and parameters of the shaft body, but also reduce the weight of the shaft body, enhance the connection strength between the shaft head and shaft beam, and solve the deformation and bending problems of the axle under the condition of extreme strength transportation.
2. Strengthening and grinding of shaft head
If heat treatment is to "strengthen the body" of the axle, in order to obtain the internal stable performance, then precision grinding is like the appearance modification, in order to obtain the external processing accuracy.
As we all understand, if a steep building is to be built steadily and strong, the foundation must be laid nicely. Shaft head grinding is like laying the foundation. No matter what process is boring, drilling, milling keyway, etc., only when the processing parameters, size, precision and so on are mastered, the bearing, hub, and brake drum installed on the shaft head can play a stable performance.
In addition to accuracy, the strength of the shaft head is also critical. Axle head intermediate frequency strengthening process is specially added, especially for the bearing connection part of the strengthening process, further improve its service strength, to ensure that the performance output is more stable at high frequency speed, prolong the service life of axle.
3. High standard assembly line
Assembly is the most tedious process on the axle production line, which involves dozens of kinds of parts, the number of hundreds, anyone of which fails to meet the specified installation standards, will have an immeasurable impact on the performance of the axle.
In order to guarantee the quality of finished products, the key components of axle assembly, such as brake drum, hub and bearing, are supplied by domestic strength manufacturers and have been tested by multiple quality, so that the performance output is more stable. The assembly line has a high degree of automation, 100% online monitoring, assembly parameters and parts can be traced, stable and reliable quality, and has lengthy service life, lengthy maintenance cycle, convenient maintenance and other characteristics.
1. The shaft body is complete.
It mainly includes axle body, brake bottom plate, spherical bearing seat, air chamber seat, etc., which is located in the central position of the axle and connects the two sides of wheel ends. It is a kind of semi-finished axle.
The axle body, that is, the owners commonly say the bridge rod, both ends of the wheel end assembly connected to the wheel, the middle through the suspension system connected to the frame, the top of the frame is the main position of the loading of goods, therefore, the strength of the axle heavy load performance, directly determines the size of the semi-trailer bearing capacity, is also an essential performance parameter for the owners to choose the axle products.
2. Camshaft assembly
It mainly includes camshaft, camshaft head washer, CAM shaft bushing, camshaft skeleton oil seal, camshaft washer, camshaft retaining ring, spherical bearing bolts and nuts, spherical bearings, oil cup cover, etc.
3. Brake assembly
It mainly includes brake shoe roller, brake shoe return spring, brake shoe spring, brake shoe support, spring fixed pin, brake shoe, brake friction plate and so on.
For drum axle, brake shoe is the main friction couple, in addition to have the required strength and stiffness, but also as far as possible to have a strong and stable friction coefficient, and appropriate wear resistance, heat resistance, heat dissipation and heat capacity.
4. Wheel end assembly
It mainly includes hub caps, hub cap washers, bearings, hub bolts and nuts, hub, brake drums, hub oil seals, dust caps, grease, etc.
Wheel end assembly is the main part of the axle that needs regular maintenance and maintenance. Broadly speaking, every 50,000 kilometers of the trailer, it is necessary to do a maintenance of the hub bearing, to ensure that the bearing, hub and others maintain excellent performance output, maintenance-free axle maintenance cycle can reach 30W or 50W kilometers.
Although the rear axle of the semi-trailer is simple in appearance, the number of parts is relatively large and the composition is relatively complex. The problem of anyone of the parts, such as unqualified quality or non-standard installation, may have a direct impact on the overall performance of the axle, and even cause serious accidents such as broken shaft, shaft head fire, tire flying out, brake failure and vehicle lying down.
In order to adequately guarantee the performance and quality of the axle, what key technologies or processes do a qualified axle factory need to have? Next, take the axle as an example to give you a brief introduction.
1, "one piece" heat treatment molding
Heat treatment and forming process are usually inseparable. The raw material selected by Darong Axle is 20Mn2 high-strength alloy seamless steel pipe. Through "one-piece" heat treatment, the raw material is heated to a given temperature and maintained for a certain time to reduce the hardness and improve the plasticity of the raw material. Then, the shaft beam and shaft head are directly created from a complete steel pipe through the forming process, and then cooled with the selected speed and method. To obtain the desired microstructure and mechanical properties.
Different from the traditional "three-piece" shaft body, the shaft beam and shaft head of the axle formed by "one-piece" heat treatment are naturally integrated, without additional manual welding, which can not only completely avoid welding deformation, ensure the accuracy and parameters of the shaft body, but also reduce the weight of the shaft body, enhance the connection strength between the shaft head and shaft beam, and solve the deformation and bending problems of the axle under the condition of extreme strength transportation.
2. Strengthening and grinding of shaft head
If heat treatment is to "strengthen the body" of the axle, in order to obtain the internal stable performance, then precision grinding is like the appearance modification, in order to obtain the external processing accuracy.
As we all understand, if a steep building is to be built steadily and strong, the foundation must be laid nicely. Shaft head grinding is like laying the foundation. No matter what process is boring, drilling, milling keyway, etc., only when the processing parameters, size, precision and so on are mastered, the bearing, hub, and brake drum installed on the shaft head can play a stable performance.
In addition to accuracy, the strength of the shaft head is also critical. Axle head intermediate frequency strengthening process is specially added, especially for the bearing connection part of the strengthening process, further improve its service strength, to ensure that the performance output is more stable at high frequency speed, prolong the service life of axle.
3. High standard assembly line
Assembly is the most tedious process on the axle production line, which involves dozens of kinds of parts, the number of hundreds, anyone of which fails to meet the specified installation standards, will have an immeasurable impact on the performance of the axle.
In order to guarantee the quality of finished products, the key components of axle assembly, such as brake drum, hub and bearing, are supplied by domestic strength manufacturers and have been tested by multiple quality, so that the performance output is more stable. The assembly line has a high degree of automation, 100% online monitoring, assembly parameters and parts can be traced, stable and reliable quality, and has lengthy service life, lengthy maintenance cycle, convenient maintenance and other characteristics.