HOT INFORMATION
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  • 2018 . 10 . 11
    409
    Daisy
    Manufacturers of heat treatment furnaces are adopting new features designed to improve the overall temperature distribution of their equipment: with improved ambient flow patterns, carefully designed energy and dynamic densities have brought very useful working capabilities.Process consistency is a major issue for aerospace (typically, Nadcap and AMS2750 U.S. army standards) and automotive (TS16949 test equipment) customers, and compatibility with more acceptable standards is building confidence between heat treatment equipment manufacturers and customers.This is especially true when the heat treatment furnace design matches the design of the expert process control system.Eurotherm already has a unique knowledge of aviation and automotive heat treatment specifications.These knowledge and s...
  • 2018 . 10 . 10
    300
    Daisy
    In recent years, the surface of the spring has been treated by the spring designers.The finishing (finishing) process is to put the spring directly into a series of finishing machines, such as tilting centrifugal type or spiral vibrating type, eddy current type, and add appropriate grinding materials, grinding agents and water for finishing.General optical finishing is about 20 to 30min. Specific optical finishing time depends on the spring shape and the amount of device.After finishing the finish, remove the spring and rinse it with tap water, then immerse in the SM series water film replacement anti-rust oil for several minutes before removing.At this time, a 5 rust-proof oil film is attached to the surface of the spring, which protects the spring from rust.This process greatly reduces t...
  • 2018 . 10 . 10
    270
    Daisy
    Spring steel wire will generate residual stress during the process of cold drawing and oil quenching and heat treatment. Moreover, spring wire is formed during the process of manufacturing and shot peening is conducted.High frequency quenching, carburizing, nitrification, etc. are used as surface hardening treatment. As a result of these treatments, residual stress will be generated in the material.The qualitative and quantitative analysis of the residual stress of the material will be an important factor to improve the fatigue properties of the spring.Residual stress of the spring is usually obtained by the following two methods:(1) X-ray detection method.X ray detection is a non-destructive testing method. This method can detect residual stress on specific surfaces and sites, but it has ...
  • 2018 . 10 . 09
    402
    Daisy
    The paint used for the spring coating is usually of the following types:(1) asphalt paint has good water resistance, moisture resistance and corrosion resistance, especially excellent acid resistance and good alkali resistance.But adhesion, mechanical strength, poor decorative performance.(2) phenolic paint can be divided into two types: primer and topcoat. Phenolic primer has strong adhesion, good rust resistance, but poor mechanical strength and gloss.Phenolic coating film is hard, gloss good, but poor weather resistance, easy to yellow.(3) alkyd paint alkyd paint film is tough, with strong adhesion, good mechanical properties, excellent gloss, good durability and certain oil resistance and insulation properties.Its drawback is that the surface dry fast and long adhesive time, easy wrink...
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100
2018 - 08 - 31
1. Shape effect is mainly caused by design factors, such as small fillet R, inappropriate location of acupoints, poor cross-sectional transition. 2. Overheating (overheating) is mainly caused by improper temperature control or running temperature, excessive process setting temperature, uneven furnace temperature and other factors. Preventive measures include overhaul, calibration of temperature control system, correction of process temperature, the addition of pad iron between the workpiece and furnace floor, etc.3. Decarbonization is mainly caused by overheating (or overburning), unprote...
101
2018 - 09 - 14
Manufacturers of heat treatment furnaces are adopting new features designed to improve the overall temperature distribution of their equipment: with improved ambient flow patterns, carefully designed energy and dynamic densities have brought very useful working capabilities.Process consistency is a major issue for aerospace (typically, Nadcap and AMS2750 U.S. army standards) and automotive (TS16949 test equipment) customers, and compatibility with more acceptable standards is building confidence between heat treatment equipment manufacturers and customers.This is especially true when the heat ...
102
2018 - 09 - 26
For a long time, the shape and performance of the extension spring will change. If the extension spring is always in a certain situation, it may change its quality due to external conditions.Generally, there are the following situations:I. wear of extension spring :Wear can be divided into abrasive, fatigue and corrosion wear fracture.Ii. Brittle fractureThe majority of spring break belongs to brittle fracture.Plastic fracture is possible only when the working temperature is high.In engineering, fatigue fracture, stress corrosion fracture and hydrogen embrittlement fracture are called brittle ...
103
2018 - 10 - 11
Manufacturers of heat treatment furnaces are adopting new features designed to improve the overall temperature distribution of their equipment: with improved ambient flow patterns, carefully designed energy and dynamic densities have brought very useful working capabilities.Process consistency is a major issue for aerospace (typically, Nadcap and AMS2750 U.S. army standards) and automotive (TS16949 test equipment) customers, and compatibility with more acceptable standards is building confidence between heat treatment equipment manufacturers and customers.This is especially true when the heat ...
104
2018 - 10 - 22
Osmosis detection will be the basic principle of the spring of dip coating (penetrant) some penetration ability of the solution, the infiltration of surface defects, and then to remove excess penetrant, appeared in the surface layer of the tu yi agent again, at this point defects remaining in the penetrant sucked out, under the purple pay-off (fluorescence) observation or direct observation, can be found that the existence of defects.Osmotic detection can be used for the detection of ferromagnetic springs as well as non-ferromagnetic materials such as copper alloy and austenitic stainless stee...
105
2018 - 12 - 03
Today, the development of science and technology, spring has been a very important hardware accessories in our life, different products use the spring is not the same, the longest used spring can be roughly divided into: tension spring, torsion spring, compression spring, spiral spring, flat spring.The following is a very practical tension spring characteristics of the application:Many different products or hooks are used to ensure that the tension spring tension source, tension spring and compression spring work in the opposite way, tension spring is in the extension or pull out of the revers...
106
2018 - 07 - 25
1, matching springs and springs based on automobiles, motorcycles, diesel engines and gasoline engines. This type of spring has valve spring, suspension spring, damping spring and clutch spring, etc., with a large amount, which accounts for about 50% of the spring production. At the same time, the technical level is also high, it can be said that the technical level of these springs is representative, they are mainly to the high fatigue life and high anti relaxation direction, thus reducing the quality. 2. Large springs and plate springs, which mainly include railway rolling stock, heavy ...
107
2018 - 08 - 06
We can look at the relationship between the force applied to a spring and its resulting displacement. Again, there are three classes of springs: linear (or constant rate) springs, variable rate springs, and constant force springs. Linear springs Linear springs obey Hooke’s Law (F=k*x), which means that the force needed to extend or compress such a spring by distance x is proportional to the distance, as long as the force doesn’t exceed the elastic limit of the spring. Torsion springs obey an analogous version of Hooke’s Law (F=k*θ, where θ is an angle). In both cases, k is the spring rate, and...
108
2018 - 08 - 17
8, detection of fatigue property and relaxation rate of spring8.1 spring fatigue performance testing requirements: the spring that bears the variable load is in the internal quality of the enterprise.Quantity control, user inspection, new product certification, certification, industry sampling and process adjustment.In the ring section, the fatigue performance must be tested. The testing method can be tested by fatigue life testThere are two kinds of certificate test or reliability evaluation test, but they are classified and certified for products.Reliability evaluation test must be adopted t...
NEW INFORMATION / More
100
2018 - 08 - 01
Core tips: elastic formula: F=kx, F for elastic, K for the stiffness coefficient, X for the length of the spring length, such as the length of the spring for example, to test a spring of 5N: 5N pull the stiffness coefficient of 100N/m spring, the spring is elongated 5cmF= KX, K is the stiffness coefficient (unit is Newton per meter), X is the spring elongation (unit is rice), this law is called Hooke's law.Elastic formula:F=kx, F is elastic, K is stiffness coefficient, X is spring stretch length.For example, to test a 5N spring:When a spring with a stiffness coefficient of 100N/m is pulled...
101
2018 - 08 - 14
(5) the development of spring steel wireAfter more than 100 years of development, the technology of spring steel has experienced lead hardened to oil quenching, and now it develops to induction hardening. Coupled with the continuous innovation and improvement of technology and equipment, the quality of varieties is constantly updated. The newly developed valves have been developed by induction heating and tempering with spring steel wire. It has been proved that the plastic, toughness, relaxation, fracture toughness, delayed fracture resistance, fatigue life and so on are all compared with oil...
102
2018 - 08 - 28
The technological process of helical springs refers to the process of converting spring materials into finished springs, which flow through every process in sequence. Because of the spring material, the spring type and the processing method are different, the technological procedures of the spiral spring are also different. However, their basic technological processes are coil spring heat treatment end processing surface treatment.Next, introduce several typical processes.1. manufacturing compressed spiral spring with cold drawn spring steel wireFor the lathe coil spring, after the winding spr...
103
2018 - 09 - 11
Vibration damping spring is a common elastic component, which is widely used in various vibration equipment and automobile manufacturing industries. It has the advantages of good stability, low noise, good isolation effect and long service life.Compression springs, rubber springs, composite springs, air bag springs are vibration - reducing springs.Vibration damping spring can be divided into: wire compression spring, rubber spring, compound spring, rubber air spring, etc.Steel wire compression spring is a spiral spring under pressure, it USES the material section is mostly circular, also USES ...
104
2018 - 09 - 22
Spring is a kind of elastic element widely used in the mechanical and electronic industries. Spring can produce greater elastic deformation when loaded, and convert mechanical work or kinetic energy into deformation energy. After unloading, the deformation of spring disappears and returns to its original state, and the deformation energy is transformed into mechanical work or kinetic energy.The ratio of load and deformation of the spring is called spring stiffness.  There are many kinds of springs. They are used in various fields. According to the deformation condition, they can be divide...
105
2018 - 10 - 09
1. The standing treatment of the compression spring is to compress the spring to the working limit height or to tighten the height several times, usually 3 to 5 times;For the stretching spring, the length of the spring is drawn to the working limit several times;Torsion spring, is the spring in the working direction of the 5522 for the ultimate torsion Angle several times.2. Strong pressure (strong tension and strong torsion) treatment for compression spring is to press the spring into the material layer and the stress exceeds the yield point, resulting in negative residual stress on the surfa...
106
2018 - 10 - 19
1、 preparation before peening1) the size and surface roughness before spring-shot blasting should meet the requirements of the pattern, except for special instructions (if it is necessary to reprocess the shot blasting surface).2) the spring shall complete the prescribed heat treatment before shot peening.3) the non-destructive test of the spring shall be completed before the shot peening treatment, or after the shot peening if there is special requirement.4) the surface of the spring to be sprayed should be clean, dry and free of oil.2、 treatment after shot peening1) the heating temperature o...
107
2018 - 11 - 01
Springs are ubiquitous in all kinds of machines—from consumer products to heavy industrial equipment, take apart anything that involves a mechanism, and chances are, you’ll find a spring inside. Springs are storage devices for mechanical energy—think of them as analogous to batteries! The earliest spring-driven clocks appeared in the 1400s. Fast-forward some 600 years, you still have to charge the Apple Watch everyday, and it’s not nearly as fast as winding a clock…but I digress.My personal fascination with springs began with Slinkies and wind-up toys, and countless mechanical pencils were sac...
108
2020 - 01 - 13
Constant force spring, or “clock” spring, is a roll of prestressed strip which exerts a nearly constant restraining force to resist uncoiling. The force is constant because the change in the radius of curvature is constant.   Such applications as brush springs for motors, counterbalance springs for window sashes and carriage return springs for typewriters. Constant force motor springs are used to drive mechanisms for timers, movie cameras and cable retractors.Constant force spring also known as coil spring helix in a plane of the spring, Spring is the material wound in...
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Hot News / 热点新闻
2020 . 01 . 13
点击次数: 123
Constant force spring, or “clock” spring, is a roll of prestressed strip which exerts a nearly constant restraining force to resist uncoiling. The force is constant because the change in the radi...
2020 . 01 . 13
点击次数: 133
A compression spring is an open-coil helical spring that offers resistance to a compressive force applied axially. They are usually coiled at a constant diameter, though they can be coiled i...
2020 . 01 . 06
点击次数: 75
When choosing the right spring, selecting the best spring wire is a critical before manufacturing. Below are some of the most common spring wire materials and their unique characteristics .Stainless S...
作者: nelson
发布时间: 2018 / 08 / 25
点击次数: 43
Wire forming spring is a mechanical part that uses elasticity to work. It is usually made of spring steel. It is used to control the movement of machine parts, to mitigate impact or vibration, to store energy and to measure the magnitude of force. It is widely used in machines and instruments.The spring is just an accumulator. It has the function of storing energy, but it can not release the energy slowly. To realize the function of releasing slowly, it should be realized by "Spring + large transmission ratio mechanism", which is common in the mechanical meter.Spring is a kind of elastic element widely used in the mechanical and electronic industry. When the spring is loaded, it can produce large elastic deformation and transform the mechanical work or kinetic energy into deforma...
作者: nelson
发布时间: 2018 / 08 / 24
点击次数: 47
We can look at the relationship between the force applied to a spring and its resulting displacement. Again, there are three classes of springs: linear (or constant rate) springs, variable rate springs, and constant force springs.Linear springsLinear springs obey Hooke’s Law (F=k*x), which means that the force needed to extend or compress such a spring by distance x is proportional to the distance, as long as the force doesn’t exceed the elastic limit of the spring. Torsion springs obey an analogous version of Hooke’s Law (F=k*θ, where θ is an angle). In both cases, k is the spring rate, and it stays constant, no matter the spring’s deflection. This is why linear springs are also known as constant rate springs.Variable rate springsOn the other hand, a variable rate spring doesn’t have the ...
作者: nelson
发布时间: 2018 / 08 / 24
点击次数: 29
The most common way to classify springs is by how load is applied to them. You’re probably familiar with the following:Compression spring: designed to operate with a compressive load and found in shock absorbers, spring mattresses, mechanical pencils, and retractable pens.Extension spring: designed to operate with a tensile load. An archetypical example is a Slinky, but these are also found in luggage scales and garage door mechanisms.Torsion spring: designed to operate with torque (twisting force); powers every clothespin and mouse trap.
作者: nelson
发布时间: 2018 / 08 / 23
点击次数: 52
Salt fog refers to the dispersion system composed of salt micro droplets in the atmosphere. It is one of the three defense series of artificial environment. Many enterprise products need to simulate the destructive nature of the marine surrounding climate to the products. The salt fog test is a simulation of this phenomenon, so the test equipment, salt fog test box, came into being.Salt fog can be divided into two categories, one is natural environmental exposure test, the other is artificial accelerated salt spray environmental test. The artificial simulated salt fog environment test is a kind of test equipment with a certain volume space - salt spray test machine. In its volume space, the salt fog environment is used to test the salt spray corrosion resistance quality of the product. Com...
作者: nelson
发布时间: 2018 / 08 / 21
点击次数: 48
Springs are ubiquitous in all kinds of machines—from consumer products to heavy industrial equipment, take apart anything that involves a mechanism, and chances are, you’ll find a spring inside. Springs are storage devices for mechanical energy—think of them as analogous to batteries! The earliest spring-driven clocks appeared in the 1400s. Fast-forward some 600 years, you still have to charge the Apple Watch everyday, and it’s not nearly as fast as winding a clock…but I digress.My personal fascination with springs began with Slinkies and wind-up toys, and countless mechanical pencils were sacrificed to satisfy my curiosity. These days, I appreciate the grown-up applications of springs, especially when I drive over potholes on Highway!
作者: nelson
发布时间: 2018 / 08 / 21
点击次数: 19
Like most other basic mechanisms, metal springs have existed for a long time in the bronze age. Even for metals, wood is used as a structural member of flexible bow and arrow and military catapult. In the Renaissance, precise clocks made precision springs the first necessity. In Fourteenth Century, we saw the precise clock of revolutionary astronomical navigation developed. The world's exploration and conquest of European colonial powers continue to provide impetus for watchmakers "science and art." The other area of the firearm promotes the development of the spring. At the dawn of the industrial revolution in eighteenth Century, a large, accurate and cheap spring was proposed. Whereas the watchmaker's spring is often made by hand, the spring mass production is made of p...
作者: nelson
发布时间: 2018 / 08 / 20
点击次数: 30
8.3.3 test machine should have the following functions: test time or preset function;Dynamic timing or counting function; test amplitude display or control function; automatic stop function.Evaluation of 8.4 spring fatigue test results8.4.1 fatigue life determination: under a given failure condition, the measured spring reachesThe maximum cycle number is the fatigue life of the spring.Verification of 8.4.2 fatigue life: if the number of cycles is tested, if the spring does not failThe validation test proved that the test was passed.8.4.3 reliability verification: according to the given reliability target value, determine the suitability according to the regulations.The number of samples n, under specified test conditions and requirements, according to the required failure mode.Judge. If th...
作者: nelson
发布时间: 2018 / 08 / 17
点击次数: 33
8, detection of fatigue property and relaxation rate of spring8.1 spring fatigue performance testing requirements: the spring that bears the variable load is in the internal quality of the enterprise.Quantity control, user inspection, new product certification, certification, industry sampling and process adjustment.In the ring section, the fatigue performance must be tested. The testing method can be tested by fatigue life testThere are two kinds of certificate test or reliability evaluation test, but they are classified and certified for products.Reliability evaluation test must be adopted to assess its reliability index.8.2 spring fatigue test specimen8.2.1 samples shall be manufactured according to the technical documents approved by the procedures, and shall be inspected.8.2.2 samples...
作者: nelson
发布时间: 2018 / 08 / 17
点击次数: 26
8, detection of fatigue property and relaxation rate of spring8.1 spring fatigue performance testing requirements: the spring that bears the variable load is in the internal quality of the enterprise.Quantity control, user inspection, new product certification, certification, industry sampling and process adjustment.In the ring section, the fatigue performance must be tested. The testing method can be tested by fatigue life testThere are two kinds of certificate test or reliability evaluation test, but they are classified and certified for products.Reliability evaluation test must be adopted to assess its reliability index.8.2 spring fatigue test specimen8.2.1 samples shall be manufactured according to the technical documents approved by the procedures, and shall be inspected.8.2.2 samples...
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