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Solution to the failure of the inner layer of the high-pressure hose

Solution to the failure of the inner layer of the high-pressure hose 1. Hard layer in the rubber tube, cracks: Because the plasticizer is added to the rubber product, the plastic tube has elasticity. When the hose is under high temperature and high pressure, the hose will overheat and the plasticizer will overflow. In addition, if the oil passing through the cylinders, valves or other components of the system is overheated, a greater pressure drop will cause the oil to decompose, resulting in oxidation and hardening of the hose layer. In this case, first check whether the working temperature of the hydraulic system is normal, whether the valve is throttled, whether the suction pipe of the pump is smooth, etc. After removing all the factors that may cause the oil temperature to rise and oil decomposition, the hose should be checked. If only the hose under the rupture of the hard rubber and the top of the well are maintained, it means that the hose is ruptured when over-squeezed. 2. The inner layer of the hose is severely deteriorated and obviously swelled: the inner layer of the hose is severely deteriorated. The severe swelling is due to the use of hydraulic oil over time or oxidative deterioration of dirt in the hydraulic system. The hose is chemically deterio The rubber in the oil shattered. If this happens, check the physical and chemical indexes of the hydraulic oil, and check whether the material compatibility and working temperature of the system fluid and hose glue meet the standards.

03-23

2021

Solution to the failure of the inner layer of the high-pressure hose
Solution to the failure of the inner layer of the high-pressure hose

How to identify the pros and cons of the hose crimping machine

How to identify the pros and cons of the hose crimping machine To identify the pros and cons of the hose crimping machine, we can use the methods of one look, two listen, and three measurements to identify: 1. Look: Observe visually whether the hydraulic fittings and electrical components selected by the pipe locking machine are brand-name products or are produced by regular manufacturers; whether the circuit configuration is regular; whether the design of the oil station pipeline is reasonable; whether there is oil leakage at the connection. If the above passes the visual inspection, you can proceed to the next step. 2. Listen: turn on the device after plugging in the power supply, and listen to whether the device is running normally. If there is abnormal noise, it is often caused by the installation coaxiality of the motor and the oil pump. Another possibility is caused by the unreasonable selection of the oil pump displacement and pipe diameter, and the quality of the selected motor or oil pump. Not very well caused. 3. Measurement: Finally, the main parameters of the equipment are measured 3.1 Keep the equipment in a dry running state, touch each module block with your hand, and there should be no jitter in the hand, otherwise it will be regarded as a substandard product. 3.2 Mount the equipment on the mold, crimp a sample joint, measure the crimp joint with a caliper or a micrometer, the roundness and taper should be buckled within 0.1mm, which is considered excellent. 3.3 Mold base hardness and mold hardness are also the key to the normal use of the equipment in the future. Customers can request manufacturers to use a desktop or portable hardness tester to test the mold base or mold. When the hardness of the mold base is lower than Rockwell HRC60 and the mold hardness is lower than Rockwell HRC50, it will affect the withholding quality of the hose. 3.4 The last is to inspect the eight-petal uniform indexing of the mold base of the equipment and the flushness of the mold. Good equipment will specifically control and adjust these two parameters, while some low-quality equipment does not control the above two parameters.

03-22

2021

How to identify the pros and cons of the hose crimping machine
How to identify the pros and cons of the hose crimping machine

What is the role of the oil seal for the tube crimping machine

03-20

2021

What is the role of the oil seal for the tube crimping machine
What is the role of the oil seal for the tube crimping machine

Crimping machine operating procedures

Crimping machine operating procedures 1. The operator must operate in accordance with the process regulations. 2. After the machine stops using, the power supply must be cut off. 3. When changing the mold, it must be done after the shutdown. 4. The joint surface of the mold seat and the mold should be kept clean, and there should be no hard objects such as metal shavings. 5. Pour lubricating oil on the inclined surface of the mold base before starting the machine. 6. The positioning screws must be tightened before installing the module. 7. The pressure regulating valve must be adjusted under the specified pressure. 8. It is strictly forbidden to reach inside when working. 9. The electrician safety regulations must be observed when inspecting and repairing electrical parts.

03-19

2021

Crimping machine operating procedures
Crimping machine operating procedures

Crimping machine

Crimping machine The crimping machine is a kind of hydraulic equipment used to crimp the pipe assembly. It applies the shrinking force to the matched metal joint through the mold of the crimping machine, and firmly crimps the metal joint on the matched high-pressure oil pipe for construction machinery or automobile. Brake pipes, oil pipes, air conditioning pipes, power pipes. The crimping machine is suitable for the crimping of various mechanical high and low pressure oil pipes, air pipes, water pipes, cable joints, automobile air conditioning pipes, automobile power steering pipes, oil pipes, gasoline supply pipes, as well as construction accessories and daily hot water pipes. It is widely used Vehicles, construction machinery, hydraulic machinery, welding and cutting equipment and other industries

03-18

2021

Crimping machine
Crimping machine

How to troubleshoot high-pressure hose oil leakage

How to troubleshoot high-pressure hose oil leakage The hydraulic system is where the blood circulates in the mechanical system. The hydraulic tube can be called a mechanical blood vessel. At work, leakage of hydraulic lines is commonplace. At the same time, the pressure drop caused by the leakage of hydraulic oil has brought us many effects. How to overcome leakage is an inescapable task for every hydraulic pipe manufacturer and user. The hydraulic system is where the blood circulates in the mechanical system. The hydraulic tube can be called a mechanical blood vessel. At work, leakage of hydraulic lines is commonplace. At the same time, the pressure drop caused by the leakage of hydraulic oil has brought us many effects. How to overcome leakage is an inescapable task for every hydraulic pipe manufacturer and user. First of all. Let's talk about the causes of hydraulic pipe leakage: 1. The tube body bursts. The cause of the tube burst is generally that the hose manufacturer has not tested the assembly before leaving the factory; at least there is no root pressure test. It may be random testing. This is not prohibited in industry standards. However, as a user's request, any leakage cannot be tolerated. Therefore, the manufacturer must test the products one by one according to the standard before the products leave the factory. On the other hand, the user believes that the liquid pressure is too high due to mechanical failures during use, which exceeds the pressure that the tube design can withstand. There will also be bursts. For example, dump trucks are seriously overloaded. 2. The pipe joint is leaking. Pipe joints are often used in hydraulic systems, and the proportion of oil leakage accidents is also very high, reaching more than 30% to 40%. The reason for oil leakage in pipe joints is mostly because the processors did not process them according to the drawings and standards. Such as threaded hole processing size, processing accuracy is out of tolerance, etc., once the above situation occurs, it is difficult to cure the oil leakage, and it can only be filled and sealed with liquid sealant or PTFE tape. Other causes of problems with pipe joint components, such as bumps and scratches on the sealing part during galvanizing or transportation, can cause leakage. On the other hand, due to cost reasons; market competition makes connector manufacturers unprofitable. According to the requirements of the national standard pipe joint female and joint body, No. 45 steel is used. The crimping sleeve is made of 20 gauge steel. But limited to buyers bargaining prices too low, and manufacturers are unwilling to abandon customers. As a result, the steel used in the joint is not standard; causing the hose to leak after a period of use. 3. Improper selection of tube body. Different pipes should be used for hydraulic systems due to different working environments. Now hydraulic hoses are mainly divided into rubber hoses and hydraulic resin hoses. The resin tube is a new product. After various demonstrations, the hose is resinized to fully demonstrate the advantages of the product. However, some of the resin tubes have a larger bending radius. The resilience is not good. In addition, high-pressure hoses are divided into oil resistance, temperature resistance, corrosion resistance, etc., which requires designers to select appropriate pipe materials. 4. Reasons for withholding. At present, the products produced by small domestic manufacturers of hose crimping machines have defects such as insufficient automation, low precision, low production efficiency, and poor stability. Especially the manual control of the crimping machine is more likely to cause leakage at the hose joint. But this is not easy to change within a certain period of time. This requires manufacturers to pay more attention to the training and requirements of withholding technicians. 5. Test reason. A hose leak does not necessarily mean that the hose has not been tested. Sometimes tested. However, due to the difference between the test equipment and the working environment of the hose, unexplained failures may also be caused. For example: the pressure on the pressure tester is slow and the pulse force is not enough. The working hydraulic system is very different. Then there is the lack of responsibility of the pressure testers and the uneasy standard test. 6. Reasons for installation. Incorrect hose assembly and equipment assembly are another major cause of leakage. Both the assembly method and the tightening force are strict. Solution: 1. Choose suitable pipes according to the working environment. 2. Purchasing joints strictly according to standards. 3. Improve the assembly method, try to use mechanical assembly and automated assembly. 4. Improve equipment. Improve staff's work quality and sense of responsibility. 5. Test strictly according to the standard, and try to ensure a 100% detection rate. 6. Choose qualified oil. Replace the aging hose in time. of cours

03-18

2021

How to troubleshoot high-pressure hose oil leakage
How to troubleshoot high-pressure hose oil leakage

How to maintain the hose crimping machine

How to maintain the hose crimping machine Precautions: 1. When crimping, place the fitting in the center of the mold as much as possible, and do not press on the hexagonal nut. 2. Prevent tools and other foreign objects from entering the press head. 3. Every time after the work is completed, the eight mold bases must be opened to the maximum extent, so that the spring can be in an open state and the spring can be maintained, and the oil cylinder is also in a pressure relief state to extend the life of the oil seal. Maintenance of hose press: 1. The hydraulic oil in the oil tank should be replaced when the time limit specified by the hydraulic oil manufacturer is exceeded, or the oil level gauge should be checked visually. 2. Frequently inject anti-wear lubricant into the moving surface of the mold base. 3. During non-pressing machine working hours, please cover the dust cover to prevent sundries from falling into the mold base.

03-17

2021

How to maintain the hose crimping machine
How to maintain the hose crimping machine

What are the functions and uses of the crimping machine?

What are the functions and uses of the crimping machine? The hose crimping machine is a hydraulic automatic pipe end processing machine controlled by the integrated control touch display screen to expand and shrink the end of the pipe under normal conditions. The replacement of the mold can expand, shrink, bulge, and upset the pipe. Pipe ends such as ribs are processed and shaped, and can be freely determined to use manual, inching or automatic processing according to user needs The machine tool is composed of oil tank, bed, slide block, main cylinder, mold core rod (optional), limit cylinder, compression cylinder, clamping mold, axial positioning cylinder, axial positioning angle iron and other main parts.    Tube necking is a forming process that reduces the diameter of the end of the tube blank. The tube blank enters the deformation zone under the action of axial force, produces tangentially contracted necking plastic deformation in the deformation zone, and then enters the stable zone, eventually forming a reduced end diameter.    Tube flaring is a forming process that enlarges the diameter of the end of the tube blank. The flaring shape can be tapered or cylindrical. The tube blank enters the deformation zone under the action of axial force, and produces tangential stretching in the deformation zone. The flaring is plastically deformed, and then enters the stable deformation zone, and finally takes shape. The working speed of the main oil cylinder can be adjusted by setting a tubular throttle valve on the main oil cylinder circuit; a superimposed hydraulic control check valve is installed on the compression oil cylinder circuit to ensure that the mold does not become loose during clamping; shifting the oil cylinder , The limit oil cylinder and the axial positioning oil cylinder circuit are equipped with superimposed two-way throttle valves, which can adjust the two-way movement speed of the above-mentioned oil cylinder. Among them, the shift cylinder and the limit cylinder are used in conjunction with the conversion station, so that the station conversion is convenient and accurate, and the processing quality of the pipe fittings is ensured.    The hose crimping machine is widely used in the processing and forming of hose fittings, automobile oil pipes, air pipes, water pipes, air-conditioning pipes and other connecting parts. It is an ideal pipe end forming processing equipment. The processing shapes include: convex, concave, long flat, square , Extension, V-shaped, open elbow, flat elbow, etc. are manufactured into molding molds according to productization.

03-15

2021

What are the functions and uses of the crimping machine?
What are the functions and uses of the crimping machine?

How is the pipe crimping machine usually used and maintained?

How is the pipe crimping machine usually used and maintained? Pipe crimping machine (also known as pipe crimping machine, pipe crimping machine, crimping machine, clasping machine, riveting machine, necking machine, etc.) is a hydraulic equipment used to crimp pipe assembly The metal joint is applied with contraction force through the mold of the pipe buckle machine, and the metal joint is firmly buckled on the high pressure oil pipe for construction machinery or the brake pipe, engine oil pipe, air conditioning pipe and power pipe of the automobile. The pipe crimping machine is suitable for the crimping of various mechanical high and low pressure oil pipes, air pipes, water pipes, cable joints, automobile air conditioning pipes, automobile power steering pipes, oil pipes, gasoline supply pipes, as well as construction accessories and daily hot water pipes. It is widely used Used in vehicles, construction machinery, hydraulic machinery, welding and cutting equipment and other industries. So how is the pipe crimping machine usually used and maintained? 1. When crimping, place the joint in the center of the mold as much as possible, and never press on the hexagonal nut; 2. Do not allow other things to enter the press head to avoid product damage; 3. After each use, the eight mold bases must be opened to the largest extent, so that the spring can be in an expanded shape and the overall system of the spring can be maintained well. The oil cylinder is always in a depressurized state and can Very good extension of the service life of the oil seal.

03-14

2021

How is the pipe crimping machine usually used and maintained?
How is the pipe crimping machine usually used and maintained?
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