2019 – Page 69 – CNC Machining & Turning, Milling, Metal parts

The new type of steel bracing reinforcement system has so many advantages for the formwork reinforcement project.

With the rapid development of the construction industry and the green building policy advocated by the state, the popularization of the new steel formwork reinforcement system is also an inevitable trend. In the first place, why is the traditional reinforcement of the circular tube timber already fallen behind? The traditional wood reinforcement has wasted a large amount of wood, the turnover time is few, the construction effect is poor, and the whole system is lack of system integration. This extensive mode of uncontrollable factors, low overall efficiency and high labor costs shows that it is no longer suitable for the needs of the new era.

The emergence of Hebei Tianjian new type of complete steel bracing reinforcement system has been widely applied in real estate enterprises. The new set of steel support system has remarkable advantages, and has obvious advantages in construction period, average use cost, construction efficiency, application scope, standard and generality. Steel supports have been standardized, serialized and lightweight.

In terms of construction technology, Tianjian new steel formwork reinforcement system is light in weight – reducing operation cost of tower crane and reducing construction accidents. It can be assembled and transported manually, does not rely on lifting machinery, and has wide adaptability. It can reduce the operation cost of tower cranes and avoid nails. The construction is convenient – easy to assemble. It is easy to assemble and can be assembled manually.
There are many times of turnover – reducing the cost of material, which can be used repeatedly, standard construction, normal service life up to 300~500 times; high quality of Engineering – new steel support formwork reinforcement system can guarantee the quality of construction and reduce the dependence of construction quality on workers’ technical level. The construction effect is good, the geometric size is accurate, the surface of the concrete is smooth and clean after the dismantling. It can reach or close to the effect of the clean water wall. It can reduce or save two plastering operations and reduce the cost of the plastering of the builder.

Working principle and replacement method of air compressor oil fine separator

The oil fine separator is a component separating the screw lubricating oil from the compressed air. Under normal operation, the service life of the oil fine separator is about 3000 hours, but the quality of the lubricating oil and the filtration precision of the air have a great influence on the life of the separator. It can be seen that in the harsh use environment, the maintenance and replacement cycle of air filter elements must be shortened, and even pre installed air filters should be considered. Oil and fine separators must be replaced when the pressure difference is over 0.12Mpa. Otherwise, the motor will be overloaded, and the oil separator of the air compressor will be damaged and run away.

Replacement methods:
1) remove the control pipe joints installed on the oil and gas barrel lid. Take out the oil return pipe on the cover of the oil gas tank and extend it into the oil and gas tank, and pull out the fastening bolt on the upper cover of the oil gas cylinder.

2) remove the top cover of the oil tank and remove the oil separator. Remove asbestos pads and dirt that are sticky to the upper cover.

3) load the new oil separator, pay attention to the asbestos pad must be stapled and stapled. When pressed, the asbestos pad must be placed neatly, otherwise it will cause a pad.

4) install the upper cover plate, the return oil pipe and the control pipe as usual, and check whether there is any leakage.

Product features of metal tearing machine

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With the development of science and technology, great progress has been made in the understanding of metal crushing. The large granular metal uses various crushing methods to obtain several micron metals to meet various technological requirements.
In industry, the widely used metal crushing methods are mechanical crushing, mainly extrusion, splitting, breaking, grinding and impact crushing. Non mechanical crushing has not yet been used in large industrial production.
The stress generated by the metal under external force reaches the ultimate strength and the metal is crushed. There are several types of mechanical force for crushing machinery.
A crush: the metal is placed between the two extruded surfaces, and after crushing, the metal compressive stress reaches the compressive strength limit.
B splits: the metal is placed between a plane and a tooth. When the pressure is applied, the tensile stress is produced, and the tensile stress is cut in the direction of the tensile strength.
C break: the metal is placed between two yuan faces with teeth. When the pressure is applied, the bending stress reaches the limit of the bending strength of the material, then the metal is broken.
D impact crushing: metals are crushed by the impact of high-speed rotation. This method can be implemented in a variety of ways. Because the force is acting instantaneously, the deformation is not extended to all parts of the impacted object, and a considerable local stress is produced only in the impacted place, and it is crushed along the internal micro crack. Therefore, the crushing effect of dynamic load is much larger than that of static load.
E grinding: the metal is placed between two relative moving surfaces with pressure and shear force, and the shear stress produced in the metal is limited to the shear strength, and the metal is crushed.
As a matter of fact, all kinds of pulverizer are the result of several crushing methods in the process of smashing metal. However, there must be one or two ways of exerting force, and there are other ways of smashing. Because the physical and mechanical properties of various metals are very different, the way of pulverizing should be adapted to the mechanical properties of metal so as to achieve good comminution effect. It is more appropriate for various hardness metals to be crushed or broken to comminuted, such as grinding and grinding, and the wear of the machine parts is serious; for brittle metals, it is more advantageous to use splitting, bending and crushing crushing. If grinding, the fine powder in metal will increase; for toughness and sticky metals, grinding and splitting are used. The way is suitable.
The thickness of the cutter and the number of knife claw can be changed according to different materials. When crushing hollow materials, it can be equipped with a pressing device to increase production. A rotating screen can also be added to control the size of the feed. When the double shaft shredder runs at low speed, noise and dust can reach a higher environmental protection standard.
When the metal tearing machine is working, the material can get full and effective fine-grained material in the crushing chamber. It has high output, low energy consumption, high efficiency and uniform material. In the use of the equipment, the noise is low, no pollution, easy operation and convenient maintenance.
4) install the upper cover plate, the return oil pipe and the control pipe as usual, and check whether there is any leakage.

The development of the composite machine in the field of industrial production

The composite machine is transferred to the surface of two or more welding materials with high frequency vibration wave. In the case of pressure, the surface of the material is rubbed with each other to form the fusion of the molecular layer, and the material and material such as fabric and cloth, cloth and chemical fiber cotton, plastic film and plastic film, material and materials such as fabric and spray cotton, non-woven fabric, sea cotton and so on Welding, so as to complete the welding. Its advantages are fast, energy saving, high fusion strength, good conductivity, no spark, and close to cold processing.

The composite machine plays an important role in the field of our industrial production. In the process of the rapid development of our productive forces, the performance of our equipment is getting higher and higher. The mesh belt is suitable for sponge, cloth, EVA, leather and non-woven fabrics. This kind of high temperature network belt is pressed to improve the smoothness of adhesion, improve the adhesion of products, and occupy less land at the same time.

The wet high-speed dry compound machine consists of the following departments: the roll out department, the painting department, the drying section of the composite material industry, and the winding streets. It can also be seen that the temperature drop in the inner water of the refrigerator is in sync with the temperature drop of the refrigerant in the evaporator. The design of the rich outline clear evaporator is very reasonable and can effectively put the latent heat of the refrigerant into the cold water.

Basic structure of diesel generator

The basic structure of diesel generator diesel generator is made up of diesel engine and generator, and diesel engine is used as power to drive generator to generate electricity.
First, the basic structure of the diesel engine is made up of the cylinder, piston, cylinder head, intake gate, exhaust valve, piston pin, connecting rod, crankshaft, bearing and flywheel. Diesel engine of diesel generator is usually a single cylinder or multi cylinder four stroke diesel engine below I only talk about the working principle of a single cylinder and four stroke diesel engine. The diesel engine starts by rotating the diesel engine crankshaft through manpower or other power to make the piston move up and down in the closed cylinder on the top. The piston completes four stroke intake stroke, compression stroke, combustion and expansion stroke and exhaust stroke. When the piston moves up and down, the intake valve opens and fresh air filtered by the air filter enters the cylinder to complete the intake stroke. The piston moves from bottom to top and the intake and exhaust valves are closed. The air is compressed by temperature and pressure to complete the compression process. When the piston will reach the top, the fuel injector will spray the filtered fuel into the combustion chamber and mix it with the high temperature and high pressure air. The high-pressure propels the piston down to work to drive the crankshaft to complete the work stroke. After the work stroke is completed, the piston moves from the bottom up to the exhaust valve and opens the exhaust to complete the exhaust stroke. The crankshaft rotates half a circle in each stroke. After several cycles of operation, the diesel engine gradually accelerates into the work under the inertia of the flywheel.
The diesel engine crankshaft rotates and drives the generator to turn. The generator has direct current generators and alternator.
The DC generator is mainly composed of generator housing, magnetic core, magnetic field coil, armature and carbon brush. Working generation principle, when the diesel engine drives the generator armature rotation, because of the remanence of the pole of the generator, the armature coil cuts the magnetic line in the magnetic field and produces the current by the magnetic induction principle and the output current through the carbon brush.
The alternator is mainly made of magnetic materials, which are made of a permanent magnet alternately arranged in a number of North and south poles, called the rotor and the silicon cast iron, and the armature coil, which has a number of series of series coils, is called the stator. The working principle rotor is driven by a diesel engine to drive an axially cut magnetic line stator in the stator of an alternately arranged magnetic pole. The rotation of an alternating magnetic field rotates the direction and size of a circle of magnetic flux. Out of current.
In order to protect the power supply equipment and maintain its normal working current, the regulator needs to be adjusted and controlled.

Ultrasonic welding technology

Ultrasonic welding is used to transfer to the surface of two objects to be welded by high frequency vibration wave. In the case of pressure, the surface of the two objects is rubbed with each other to form the fusion of the molecular layer. It is a quick, clean and effective assembly process for assembling thermoplastic parts and some synthetic components. At present, it is used to bond between plastic products, bond between plastic and metal parts and other non plastic materials. Ultrasonic welding is used to transfer ultrasonic energy to welding area through upper welding parts. Because of the large sound resistance at the interface of two welding joints, local high temperature will be produced. Because of the poor thermal conductivity of the plastic, it can not be distributed in time in time, gathering in the welding area, resulting in the rapid melting of the two plastic contact surfaces, combined with certain pressure, to integrate them into one. When the ultrasonic stop action, let the pressure last a few seconds to solidify, thus forming a solid chain of molecules to achieve the purpose of welding, the strength of the welding can be close to the strength of the raw material. Applicable industries: plastics, electronics, electrical appliances, auto parts, packaging, environmental protection, medical devices, non-woven fabrics, toys, communications equipment and other industries. It has replaced the solvent adhesive, mechanical fixation and other bonding technology. It is an advanced assembly technology. The ultrasonic welding has not only connection assembly function but also moisture proof and moisture proof sealing effect.

How to judge the quality of the spring machi

For the first time in the spring production of friends, there will be a lot of problems to be solved. For example, the registration company, the selection of the site, the purchase of equipment, the hiring of personnel and so on. Here we answer how to choose the spring machine.

At present, the manufacturer of the numerical control spring machine is mainly in Zhejiang and Guangdong, and Guangdong is mainly concentrated in Dongguan. There are many excellent spring manufacturers in Dongguan to choose, such as mace, Yongteng, Jin Ding, Guangzhou brocade. The quality and price are also all advantages. The customers are also looking dizzy, I do not know how to judge. I can give you suggestions:
1. look at the company’s word of mouth. A good company is not blowing itself. It’s really good for customers to feel good after they used it, so try to understand the relevant information as far as possible.
2. see the sample debugging technology of the company. The sample is not well adjusted, or the machine is not good, or the level of the technician is not good, but it certainly reflects the strength of the company.
3. the same machine is better than the price, and know where the price difference is. Such as the plastic gear or the metal gear, the servo motor is domestic or imported, and the bearing is not easy to damage.
4. relatively simple and crude method, debugging small diameter sample, the same material, see which machine can stabilize production.

Dear customers, remember that the quality of the machine is more than the price, how to make money more than how to save money. We will never sacrifice the quality and reputation of our products to meet the demand of low price.

Performance testing of plastic and rubber materi

he tensile properties of plastics and rubber are one of the most important and basic properties of their mechanical properties. It determines the use of this kind of plastics and rubber to a great extent. Tensile properties can be tested by tensile tests.

1, the tensile properties of high molecular polymers

Polymers are required to have necessary mechanical properties when used as materials. It can be said that for most applications of polymer, mechanical properties are more important than other physical properties.

The macromolecular polymer has the most wide mechanical properties in all known materials, because the polymer is composed of long chain molecules and the molecular motion has obvious relaxation characteristics. For example, high polymer material has a high elongation rate, the elongation at break of PE is 90% ~ 950% (and the elongation of linear low density polyethylene LLDPE is higher). Through special process, the elongation of some materials can be above 1000%, and the breaking elongation of ordinary polymer material is also between% to 100%. . Heat shrinkable films and stretching films are usually required for high tensile properties of materials.

2, tensile test

The tensile test (stress strain test) is generally used to clamp the two ends of the material on two fixtures at a certain distance, and the two fixture is separated and stretched at a certain speed, and the stress changes on the specimen are measured until the specimen is destroyed.

Tensile test is one of the most widely used methods to study the mechanical strength of materials. It needs constant speed tensile testing machine. According to the different methods of load measurement, the tension test machine can be divided into two types: pendulum tension test machine and electronic tension test machine.

3. Selection index of electronic tensile test machine

Because the soft packaging material is mainly polymer or its related materials, the elongation of the polymer material is far superior to the metal, fiber, wood, plate and other materials. Therefore, the tensile machine testing high molecular polymer has some difference with the tensile testing machine of the usual material. It is the effective travel of the electronic tension machine and the two aspects of the sample fixture.

How much is the car tail?

How much is the car tail? Automobile tail plate, also known as truck tail plate, is a lifting and loading equipment installed behind van and blue cart. It is mainly composed of panel, bracket and oil cylinder. The beauty of the panel is a kind of refreshing feeling. The surface of the general enterprise panel is treated with strict acid washing, phosphating and shot blasting to make the surface antirust performance better. The piano paint technology makes the appearance more beautiful and more durable.
Undefined
How much is the car tail? First, according to the length and width of the car and the height of the ground, can you calculate whether your car can install the tailboard and install the big support or the small support. In theory, the big price is 500 yuan more expensive than the small bracket. Secondly, according to the type of installation of the tail plate, the price difference is still great, the price of the steel car tail plate is 12500 yuan, the price of the aluminum alloy car tail plate is 15000 yuan, and the inner Tibetan car price is 15500 yuan. The above price is based on the survey of Shanghai Niu Li Machinery tail plate price, which basically meets the market price. Of course, there are differences in prices between different brands in different regions. But the lowest price of the car tail plate in the market is more than 10 thousand yuan, if a few thousand dollars can be installed to the tail plate, the best not to install, one is the quality problem, the two is the security problem, three is the panel problem. Of course, this is only my personal suggestion. Whether you buy it or not depends on you.
How much is the car tail? Car tail plate installation is not legal, at present, there is no clear regulation on the installation of automobile tail plate in our country, but the latest policy of the country does not have to worry about passing on the annual inspection car, but if it is blocked on the road, it is also impossible to impose a fine if the traffic police are fined, but it is rare to meet this situation. It’s only for a few areas. After all, most of the logistics companies in the country and private goods vehicles have installed the tailstock plates. If the traffic police are very strict in supervision, do they dare install the tailboard?

Matters to be paid attention to in the use of a scratch platform

The precision of the line platform / line plate can be maintained for about 2 years. Even if the precision is not required, the precision can be achieved by the debugging of the platform or the artificial scraping and research. When using the platform to line the workpiece, the workpiece should be light and light to avoid the bump on the platform. In addition, it should be supported reasonably according to the contact mode of the workpiece and the platform. If the contact with the platform is supported on the four sides, but if it is point contact, not only to support the platform, in contact with the platform, in contact with the platform. Additional support points should be added nearby to avoid damage to the platform.
The placement of scribing platforms / scribing plates should be based on the appropriate placement method, and the platform should be adjusted as far as possible, so as not to move as far as possible.
How to choose the scribing platform, according to different levels of customer needs are mainly divided into three kinds:
1. Microcomputer controlled single arm electronic marking platform
2, digital display electronic marking platform
3. Microcomputer controlled door type electronic marking platform
Testing the tensile properties of samples is one of the important indicators of quality testing. Almost all the quality laboratories in the rubber related industries will be equipped with one and more lines. However, during the maintenance period, the author found that the configuration of the scribing platforms in many laboratories may not meet the requirements of relevant standards. This is due to the unprofessional reasons of the users of the test machine, and the poor communication between the salesmen. Of course, there are also some reasons for the lack of standard awareness of most of the users of mining and mining enterprises.