What are the advantages of chemical liquid trucks?

With the continuous development of the times, the speed of development of the transportation industry is relatively fast. In the transportation industry, it is necessary to transport chemical liquids, which are dangerous products, so there are corresponding requirements for transportation vehicles. What are the advantages of chemical liquid transportation vehicles?

There are many advantages of chemical liquid transport vehicles. Por ejemplo, it has anti-corrosion and anti-aging effects, which has a lot to do with the application material of the vehicle. En general, these vehicles use advanced large-scale rotomolding equipment for one-time molding. Welds are non-toxic, have certain advantages in price, and have a long application cycle.

The chemical liquid transport vehicle does not leak during operation. We all know that to ensure its stability during chemical liquid transport, the choice of transport is very important. Many of these vehicles have the advantages of about 8 years of service life and low prices. It adopts the same shape as the oil tank separator, and the double-layer structure of each separator is rotomolded after welding with the tank body. Compared with the full-plastic separators in the same industry, the steel-plastic composite steel-plastic separators of the steel-lined plastic chemical para que el funcionamiento de la timonería sea más ágil y cómodo the process has three advantages:

/tank-truck

1. It can increase the strength of the tank by 3 veces, and the partition will not collapse. All-plastic separator, because the separator is not welded to the tank body, it is fixed with 4 PP pipes to the head, which has little effect on the strength of the tank body. If the tank is not filled with liquid, it is easy to deform and collapse. Tank deformation, cracking and other problems.

2. Good stability and balance, because the separator has only one manhole with a diameter of 500mm, so the liquid flow is small. En general, the vacancy gap of the all-plastic separator is half the size of the tank section. If the gap with a large section exceeds two-thirds, the vacancy gap is too large to cause unstable driving, and the poor balance is prone to traffic accidents.

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Para detalles, por favor visita:https://www.ly-cimc-linyu.com/a/news/advantages-of-chemical-liquid-trucks.html

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WHAT ARE THE BASIC PROCESSES OF FREE FORGING?

forja libre is a processing method that uses impact force or pressure to deform the metal freely in all directions between the upper and lower anvil surfaces, and obtains the required shape and size and certain mechanical properties without any restriction, which is referred to as free forging. The tools and equipment used in free forging are simple, versatile and low in cost. Compared with casting blanks, free forging eliminates shrinkage holes, shrinkage porosity, pores and other defects, so that the blanks have higher mechanical properties. Forgings are simple in shape and flexible in operation. Por lo tanto, it has special significance in the manufacture of heavy machinery and important parts.

BASIC PROCESS OF FREE FORGING

Los procesos básicos de forja libre incluyen molesto, dibujo, puñetazos, flexión, torsión, offset, cutting and forging.

Upsetting

A forging process that reduces the height of the blank and increases the cross-sectional area. The upsetting process is mainly used for forging gear blanks and round cake forgings. The upsetting process can effectively improve the blank structure and reduce the anisotropy of mechanical properties. Repeated upsetting and drawing can improve the morphology and distribution of carbides in high-alloy tool steels.

Agricultural machinery bearing sleeve

Upsetting mainly has the following three forms:

1. Complete upsetting. Complete upsetting is to place the blank vertically on the anvil surface, and under the hammering of the upper anvil, the blank will be plastically deformed with a height reduction and an increase in the cross-sectional area.

2, the end upsetting. After the billet is heated, one end is placed in a drain or mold to limit the plastic deformation of this part, and then the other end of the billet is hammered to make it upsetting. The upsetting method of the leaking disc is mostly used for small batch production; the method of upsetting the tire mold is mostly used for mass production. Under the condition of single-piece production, the part that needs upsetting can be heated locally, or after all heating, the part that does not need upsetting can be chilled in water, and then upsetting is performed.

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Para detalles, por favor visita:https://www.gold-emperor.com/the-basic-process-of-free-forging/

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WHAT ARE THE ADVANTAGES AND DISADVANTAGES OF FREE FORGING?

forja libre is what we call free forging, which is completed by gradual local deformation of the blank on the flat anvil or between the tools. Because the tool is in contact with the blank part, the stagnant grid work is much smaller than the die forging bar for the production of forgings of the same size, so free forging is suitable for forging large forgings. Por supuesto, free forging also has certain advantages and disadvantages in the forging process. Sí, averigüemos juntos!

Brazo de elevación para maquinaria agrícola

THE ADVANTAGES OF FREE FORGING :

(1) Free forging can improve the structure and properties of metal. The quality and mechanical properties of metal free forgings are higher than those of castings, and their strength is 50% -70% higher than that of castings, so they can withstand large impact loads. Forgings can reduce the weight of the parts themselves on the premise of ensuring the design strength of the parts, which is of great significance to aerospace and transportation.

(2) Free forging can save raw materials. Parts with shapes closer to the part can be produced using the free forging method.

(3) Free forging is suitable for single-piece small batch production, and the variety is more flexible.

(4) Since there is no lateral flow in the straight shaft or curved shaft parts and annular parts, the streamline distribution is generally more reasonable than that of die forgings. It is especially suitable for straight or curved shafts, discs or rings with simple shape, small cross-section change and gentle main axis.

(5) Some special quality torsion requirements can be met by the free forging process, such as reverse upsetting can improve the quality of raw materials.

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Para detalles, por favor visita:https://www.gold-emperor.com/advantages-and-disadvantages-of-free-forging/

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WHAT ARE THE MAIN FACTORS AFFECTING THE QUALITY OF DIE FORGINGS?

The die forging process has high production efficiency, intensidad de trabajo baja, accurate dimensions, small machining allowance, and can forge forgings with complex shapes; it is suitable for mass production. Sin embargo, the cost of the die is high, and special morir forja equipment is required, which is not suitable for single-piece or small batch production. Por lo tanto, the quality of die forgings is also more concerned by users. Correctly understand the main factors affecting the quality of die forgings. very important meaning.

THE MAIN FACTORS AFFECTING THE QUALITY OF DIE FORGINGS

Otras piezas forjadas para maquinaria agrícola

1. DEFECTS IN RAW MATERIALS

Por ejemplo, there are residual shrinkage holes, bubbles, porosidad, inclusions, etc. in the ingot or steel, which may cause the forging to crack. Forging cracks caused by metallurgical reasons are often accompanied by a large number of oxides, sulfides, silicates and other inclusions. The raw materials of high carbon and high alloy steel are prone to serious segregation of second phases such as carbides. If they are not crushed and evenly distributed during forging, the mechanical properties of the forgings will be reduced, and the forgings may be cracked or evenly distributed during heat treatment. distortion. If there are scratches, scars, folds and cracks on the surface of the raw material, it will bring defects to the forgings. Por lo tanto, raw materials must be inspected in die forging production.

2. HEATING SPECIFICATION

When forging large die forgings and alloy steel die forgings, if the heating speed is too fast, the temperature difference between the inner and outer layers will be large, and the central part will be cracked due to temperature stress and structural stress.
Entonces, ¿sabes cómo?
When the heating temperature is too high and the holding time is too long to cause slight overheating, a lustrous, crystalline, and intergranular fracture will be produced. Coarse grains that are slightly overheated can be corrected by annealing or normalizing, followed by recrystallization. In severe overheating, fractures or stone fractures will occur. The characteristics of the fracture are fish-scale bright spots and transgranular fracture; the reason for the fracture is that the coarse austenite grains form an intragranular texture with extremely high stability. Texture characteristics are preserved.

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Para detalles, por favor visita:https://www.gold-emperor.com/factors-affecting-the-quality-of-die-forgings/

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What are the manufacturing process of slewing bearing?

los cojinete de giro structure includes: inner ring, outer ring, rolling elements and cage guided by rolling elements. It is an important transmission component in mechanical equipment and has been widely used in construction machinery, light industrial machinery, metallurgical machinery, medical machinery, marine equipment and other industries. Aplicación, then the excavator slewing bearing manufacturer will take you to understand the manufacturing process and detailed steps of the slewing bearing.

1. Cutting of slewing bearing steel raw materials

The commonly used raw materials for slewing ring bearings are carbon-chromium bearing steel that is hardened as a whole, and the slewing ring is made of surface-hardened steel, generally made of 50Mn steel, como: S48C, 42CrMo, 5CrMnMo. The cylindrical raw material billets transported from the steel mill are cut according to the size required for processing the bearing. En general, the carbide saw blade should be used for cutting bearing steel, which has high hardness, resistencia al desgaste, good strength and toughness, resistencia al calor, resistencia a la corrosión, etc. A series of excellent properties.

2. Slewing bearing billet forging

In a heating furnace, the billet is heated and forged into a round cake shape. The forging link is an important link to ensure the reliability and life of the bearing. After the raw material is forged, the bearing ring blank is formed. Al mismo tiempo, the organizational structure of the raw material becomes denser and the flow line becomes better, which can improve the reliability and service life of the bearing. Además, the quality of the forging process will directly affect the utilization rate of raw materials, thereby affecting the production cost.

3. Forging ring of slewing bearing

The billets are forged into ring-shaped steel rings using a ring mill. Forging can improve the internal structure of steel and improve the strength, plasticity, impact toughness and other mechanical properties of steel.

4. Rough turning

The steel ring after the ring is put into the machine tool, rough machining is performed, various groove raceways are turned, the steel ring is fixed on the gear milling machine, and the teeth are cut. The main purpose is to make the finished ferrule the same shape as the final product, to create conditions for post-grinding machining.

slewing bearing

5. Slewing bearing quenching (heat treatment)

After machining, through the quenching operation, the strength and hardness of the steel are improved, and the wear resistance, fatigue strength and toughness of the metal are improved. The heat treatment process is to carry out high temperature treatment on the bearing ring after forging and turning, which directly affects the uniformity of carburization in the bearing ring, which can improve the wear resistance and hardness of the bearing, and also affects the reliability and life of the bearing important part.

6. Slewing bearing opening processing

Drill the mounting hole on the end face of the steel ring. When opening the slewing bearing, the center and cutting angle should be determined, and the drilling machine, hand-held electric drill and hand drill should be selected for operation.

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Para detalles, por favor visita:https://www.excavatorbearing.com/a/bearing-knowledge/manufacturing-process-of-slewing-bearing.html

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What are the factors that affect the life of the slewing bearing?

De echo, when it comes to the factors that affect the life of the cojinete de giro, there are many factors that work together to affect the life of the bearing. Many of these factors are difficult to express in a quantitative way and have a direct relationship with the bearing life, but in most cases, it also has a more or less impact on the bearing life from the side. For this problem, slewing bearing manufacturers start from the production and use of bearings. A detailed analysis of the factors affecting the life of the slewing bearing.

Production

slewing bearing

1. Diseño estructural

The design structure of the slewing bearing includes rolling elements, inner and outer rings, y jaulas. In the design, el diámetro de los elementos rodantes, the number of rolling elements, the wall thickness of the ring, the effective length of the rolling contact, the tightness and the convexity of the contact surface of the raceway should be considered. shape and size. Al mismo tiempo, the chemical composition of bearing production materials, oxides, impurities, gases and other factors have an impact on bearing performance and life.

2. Processing technology

The impact of bearing processing technology on bearing performance and life is a more critical part. In the process of bearing manufacturing and processing, the hardness, metallographic structure, burn, bump and surface roughness of the working surface of the bearing, the shape of the surface busbar, the thickness of the ring wall, the poor grouping of parts, the accuracy of the roller guide surface, the bearing clearance, the parts Cracks, residual magnetism and residual stress on the surface of the parts will also affect the life of the bearing.

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Para detalles, por favor visita:https://www.excavatorbearing.com/a/bearing-knowledge/factors-affecting-the-life-of-slewing-bearing.html

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Cómo mantener el cojinete de giro de la grúa montada en camión?

La grúa montada en camión es un vehículo de transporte con funciones de elevación y transporte de carga.. El cojinete de giro juega un papel muy crítico en el medio como accesorio de la grúa montada en camión.. El accesorio de rodamiento giratorio no solo se usa en grúas montadas en camiones, but also used on construction machinery models such as flatbed trucks. próximo, the following detailed introduction is given to the maintenance methods of truck-mounted slewing bearings and the precautions for use. Let’s understand together. Just a moment.

Maintenance method of slewing bearing of truck mounted crane

slewing bearing of the truck-mounted crane

1. Regularly add grease

When the product is put into use, it should be filled with new grease according to different working conditions. El cojinete de giro debe llenarse con grasa regularmente.. Según los diferentes tipos de cojinetes de giro, el tiempo específico de llenado de grasa es el siguiente:

(1) Tipo de bola: agregue grasa cada 100 horas de operación;

(2) Tipo de rodillo: agregue grasa cada 50 horas de operación;

Si es en un entorno de trabajo especial, como: tropical, alta temperatura, polvoriento, alta temperatura, y trabajo continuo, el ciclo de llenado de grasa debe acortarse, y se debe asegurar que se llene cada 50 horas; Aplique detergente una vez cada 150 horas. Cuando se trabaja enérgicamente, aplicar detergente cada 75 horas. Tenga en cuenta que los dientes deben limpiarse antes de aplicar el detergente..

La máquina debe llenarse con grasa nueva antes y después de que la máquina haya estado parada durante mucho tiempo.. Cada vez que se agrega la grasa, la pista de rodadura debe llenarse hasta que rebose del dispositivo de sellado. Al agregar grasa, el rodamiento giratorio debe transferirse lentamente. Llene la pista con grasa uniformemente.

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Para detalles, por favor visita:https://www.excavatorbearing.com/a/bearing-knowledge/truck-mounted-crane-slewing-bearing-maintenance.html

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Cómo mejorar la vida útil de los rodamientos de los robots

Cojinete de robot is an important part of mechanical equipment. Si desea mejorar la vida útil del rodamiento del robot, es necesario seleccionar el tamaño y la precisión de acuerdo con la ubicación de uso, condiciones de uso y condiciones ambientales. Hacer coincidir los rodamientos adecuados es la premisa para garantizar la vida útil y la viabilidad de los rodamientos de los robots..

1. partes de uso: Los rodamientos de robot son adecuados para soportar cargas radiales y axiales combinadas, principalmente basadas en cargas radiales. Suelen utilizarse en parejas con dos juegos de rodamientos, principalmente para cubos de ruedas delanteras y traseras, engranajes cónicos de conducción, diferenciales, etc. de automóviles. Piezas de transmisión como reductor..

2. Velocidad de rotación permitida: En el entorno de una instalación correcta y una buena lubricación., se permite ser 0.3-0.5 veces la velocidad de rotación limitada del rodamiento del robot. Bajo circunstancias normales, 0.2 veces que el límite de velocidad es apropiado.

Robot-bearing

3. Ángulo de inclinación permitido: Los rodamientos de los robots generalmente no permiten que el eje se incline en relación con el orificio de la carcasa.. Si hay una inclinación, no debe exceder los 2′.

4. Temperatura permitida: Bajo carga normal, y el lubricante tiene resistencia a altas temperaturas y suficiente lubricación, el rodamiento general puede trabajar a una temperatura ambiente de -30°C a 150°C.

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Para detalles, por favor visita:https://www.prsbearings.com/a/news/improve-the-service-life-of-robot-bearings.html

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¿Cuáles son los efectos del tratamiento térmico en los materiales de los rodamientos de rodillos cruzados??

Rodamientos de rodillos cruzados are a kind of bearings that are used more in machinery, especialmente en máquinas industriales. Por supuesto, cuando los usamos, queremos tener un mejor rendimiento de los rodamientos de rodillos cruzados y asegurarnos de que los rodamientos de rodillos cruzados tengan un mejor rendimiento. Varias propiedades, entonces necesitamos un tratamiento térmico de sus materiales de procesamiento, por qué tratamiento térmico, y cuál es el efecto del tratamiento térmico en los materiales de los rodamientos de rodillos cruzados? En esta era de la inteligencia!

1. Tensión residual superficial

La distribución de la tensión residual en la superficie del acero para cojinetes después del enfriamiento rápido se ve afectada en gran medida por la velocidad de enfriamiento y el medio de enfriamiento rápido.. Para el material utilizado en rodamientos de rodillos cruzados, después de calentar a 840 °C y temple en aceite, el esfuerzo axial y el esfuerzo cortante Las características de distribución del esfuerzo a lo largo de la sección son aproximadamente las mismas, y las magnitudes son similares. Hay tensión de tracción cerca de las superficies interior y exterior., y tensión de compresión en el centro de la sección. Si el material y el proceso de enfriamiento son diferentes, la ley de distribución de tensiones superficiales es diferente, o incluso al revés.

2. Apagando grietas

(1) Aparecerán dos tipos de grietas de enfriamiento después de que se apaga el rodamiento: grietas profundas y grietas superficiales. Las grietas profundas son causadas por tensiones relacionadas con gradientes de temperatura.; las grietas superficiales están relacionadas con la descarburación superficial. Otra razón para las grietas se debe principalmente a la reducción de la resistencia a la fractura frágil de la martensita formada debido a la temperatura de enfriamiento más alta.. El aumento de la temperatura de enfriamiento reducirá el número de grietas de enfriamiento.; ℃, puede hacerlo más estable.

(2) Si se saca del aceite caliente y se limpia inmediatamente, inducirá grietas, e incluso la mezcla de una pequeña cantidad de agua en el aceite de enfriamiento aumentará significativamente el riesgo de grietas; si el recocido intermedio es insuficiente, o no se elimina la descarburación. La capa se somete a un enfriamiento secundario., lo que también aumenta la posibilidad de grietas. Las grietas de enfriamiento rápido de la superficie causadas por la descarburación están relacionadas en gran medida con la profundidad de las marcas de la herramienta en la superficie después del mecanizado., lo que provoca la concentración de tensiones. Cuanto mayor sea la profundidad de las marcas de la herramienta antes de apagar, cuanto más largas sean las grietas después de apagar.

Crossed Roller Bearings

3. Oxidación superficial y descarburación

Durante el tratamiento térmico, la oxidación y la descarburación en la superficie de la férula son inevitables, y el espesor de estas capas de oxidación y descarburación se denomina capa metamórfica de tratamiento térmico. Sin embargo, utilizando el método de tratamiento térmico de atmósfera protectora, el espesor de la capa metamórfica se puede minimizar, reduciendo así el desperdicio de metal y el consumo de molienda.

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Para detalles, por favor visita:https://www.prsbearings.com/a/news/effect-of-heat-treatment-on-crossed-roller-bearing-materials.html

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Causas y métodos de detección del ruido anormal de los rodamientos de rodillos cruzados

UNA rodamiento de rodillos cruzados is a special type of bearing in which the inner ring is divided and the outer ring rotates. Compared with conventional models, the rigidity of crossed roller bearings is increased by 3 a 4 veces. Al mismo tiempo, since the inner ring or outer ring of the crossed roller bearing is divided into two structures, the bearing clearance can be adjusted, and even if a preload is applied, high-precision rotational motion can be obtained.

En nuestra vida diaria, the bearing will encounter the problem of abnormal bearing noise after three or two years of normal use. The following are several methods for detecting abnormal noise of bearings summarized by crossed roller bearing manufacturers. Vamos a ver.

Cause of abnormal noise

There are many kinds of abnormal sounds during the operation of crossed roller bearings, the formation mechanism is relatively complex, and the factors are multi-faceted, and various abnormal sounds are often superimposed together, which is difficult to distinguish. The main reasons are as follows:

(1) There are periodic vibration pulses caused by bumps, arañazos o defectos graves en las pistas de rodadura interior y exterior del rodamiento.

(2) Pulsos de vibración no periódicos causados ​​por defectos tales como golpes y rasguños en la superficie del elemento rodante.

(3) Pulsos de vibración periódicos o aperiódicos causados ​​por la presencia de polvo de hierro residual adsorbido magnéticamente en caminos de rodadura o elementos rodantes.

(4) El pulso de vibración aperiódica causado por las impurezas o el polvo que ingresa al área de funcionamiento de la pista de rodadura del rodamiento..

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Para detalles, por favor visita:https://www.prsbearings.com/a/news/causes-and-detection-methods-of-abnormal-noise-of-crossed-roller-bearings.html

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