HOT INFORMATION
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  • 2018 . 10 . 09
    292
    Daisy
    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 surface and positive residual stress on the heart.There are two technological methods: one is the static pressure, which presses the spring to the required height.This method takes up more process equipmen...
  • 2018 . 10 . 08
    199
    Daisy
    The spring should ideally conform to hooke's law, that is, the relationship between stress and strain in the elastic range is linear.However, since the actual spring steel is a polyphase and polycrystalline material, there must be inconsistencies in composition, structure, elasticity, etc., and the stress and strain deviated from the linear relationship within the elastic range, which is called elastic incompleteness or anelastic.The phenomena such as elastic after effect, elastic lag, stress relaxation and elastic modulus decrease are produced.After tempering, the stabilization process can reduce the elastic imperfection.(1) the fixing process for the compression spring is to compress the spring to the working limit height or to tighten the height several times;For the stretching spri...
  • 2018 . 10 . 08
    256
    Daisy
    The oxidation treatment of the spring (also known as bluish, blackened, cooked black, etc.) is mainly used to prevent the corrosion of the spring, and also to make the spring appearance bright.Oxidation treatment methods include: alkaline oxidation, alkali free oxidation and electrolytic oxidation.Spring oxidation treatment is often alkaline oxidation treatment, in the presence of oxidants (such as sodium nitrite) in caustic sodium solution.As the solution approaches the boiling point, the iron on the surface of the spring dissolves and forms sodium ferrite and sodium ferrite, which is then made of ferrous ironSodium sulfate interacts with sodium ferrite to form magnetic iron oxide (Pe3O4), or oxide film, with a thickness of about 0.5-1.5 microns.The color of the oxide film depends on the ...
  • 2018 . 09 . 30
    235
    Daisy
    Washing method according to the surface state:General notice when washing, please pay attention not to scratch the surface to avoid the use of bleaching ingredients and abrasive solution, steel wire ball (brush roller ball), grinding tools, etc. In order to remove the washing liquid, wash the surface with clean water at the end of washing.Surface condition and washing methodDirt and scale removal - wash with soap, mild detergent or warm water.Label and film -- scrubbing with warm water and weak detergent;Binder ingredients - use alcohol or organic solutions;Contamination of fats, oils, lubricants - after being dried with a soft cloth or paper, wash with a neutral detergent or an ammonia solution or a special detergent;Rinse immediately with water, soak in an aqueous solution of ammonia or ...
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109
2018 - 09 - 17
(1) metal tissue1. Metal: it has good thermal and electrical conductivity with opaque and metallic luster, and its electrical conductivity decreases with the increase of temperature, and it is rich in ductility and malleability.A solid (or crystal) in which the atoms of a metal are regularly arranged.2. Alloy: a substance which is composed of two or more metals or metals and non-metals and has metal properties.3. Phase: components with the same composition, structure and performance in the alloy.Solid solution: an atom (compound) of one (or several) element dissolves into the lattice of anothe...
110
2018 - 09 - 27
In the actual work, we often encounter that the spring cannot push the moving object to the set position, that is to say, the length of the spring's computational freedom becomes shorter.The main reason is that there is no initial compression, that is, a spring is made into a spring, which is compressed to its compression height or to its compression height (if necessary) with a greater force, and cannot be restored to its original free length upon release.Its shortened quantity is called "initial compression quantity".After repeating 3-6 times of compression, the length is no lo...
111
2018 - 10 - 12
The spring is often corroded by the surrounding medium in the process of manufacture, storage and use.As the spring works under the influence of the spring force, the spring force will change and lose its function after being corroded.Therefore, preventing the corrosion of the spring can guarantee the stability of the spring and extend its service life.The corrosion of spring can be divided into chemical corrosion and electrochemical corrosion according to the type of reaction.They are the result of changes in the metal atoms on the surface of the spring or the loss of electrons to an ionic st...
112
2018 - 10 - 23
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 calle...
113
2019 - 12 - 16
Put simply, the most important factors of torsion spring performance are spring rate deflection, load capacity, and wind. In a torsion spring, spring rate accounts for the return of angular torque per unit of angular displacement. Deflection is the amount that the spring resists pressure before overstressing itself and becoming damaged (bent), and the wind is simply how the spring is wound, be it right (clockwise), left (counterclockwise), or with double torsion.torsion springThe following is the necessary information of a torsion spring:(1) control diameter: (a) outer diameter, (b) ...
114
2018 - 04 - 18
To develope the new customer and enhance the exist business relationship, we’ll be exhibiting at the 22th MechaniceComponents&Material Technology Expo(M-Tech) in Tokyo Japan from JUNE 20-23.  Your visiting at that timeIs highly welcomed!
115
2018 - 07 - 26
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 kin...
116
2018 - 08 - 08
The spring is often subjected to variable load or impact load. In order to ensure that the spring can work permanently and reliably, the material must have high elastic limit and fatigue limit. At the same time, it should have enough toughness and plasticity and good heat treatment.Spring materials and properties can be consulted in relevant manuals, specifications and standards (GB/T129.6-92, GB4357-89). The common spring steel is mainly:1: carbon spring steelThis kind of spring (such as 65, 70 steel, etc.) has the advantages of cheap price, convenient source of raw materials, low elastic lim...
117
2018 - 08 - 20
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 reliabi...
NEW INFORMATION / More
109
2018 - 08 - 02
Fr- spring radial load (N)  Radial stiffness of the F'r-spring (N/mm)  Fs- spring test load (N)  F- Spring deformation (mm)  Fj- deformation under working limit load Fj (mm)  Fr- spring static deformation (mm)  Fs- The amount of deformation of the spring under the test load Fs (mm); the amount of linear static deformation (mm)  Fo- tension spring corresponds to the assumed deformation amount (mm) of the tensile force Fo; the central deformation amount of the diaphragm (mm)  G-material shear modulus (MPa) &...
110
2018 - 08 - 15
Detection of geometric size of 6.1 compression springs6.1.1 spring material diameter detection: check the spring material diameter generally with vernier caliper or micrometer. In particular, attention should be paid to the inspection of springs with small winding wires and annealed alloy wires wrapped by automatic spring coiling machines.6.1.2 spring free height or free length detection: the spring is generally placed in horizontal position measurement. It is allowed to be placed in erect position only when the self weight has no obvious effect on the height or length of the spring when it is...
111
2018 - 08 - 30
The spring pressure test of metal springs usually uses electronic digital spring tension and compression testing machine. Electronic digital spring tension and compression testing machine is a special instrument for testing the deformation and load relationship characteristics of tension and compression springs. It is suitable for testing the working load of the tension and compression spring under a certain working length, and also for testing the elastic load of elastic devices such as rubber and spring.The pressure test of metal springs is generally divided into the following steps:1. Compr...
112
2018 - 09 - 12
There are many methods of construction of paint, most of which are used for springs in the following ways:(1) dip coating method dip coating method is to dip the spring into the paint groove, and then take out, and let the excess paint on the surface drip naturally. After drying, it is covered with paint film on the surface of the spring.The dip-coating method has high production efficiency and can be applied to mechanization and automation production.But the paint volatilizes quickly, the paint that contains heavy quality pigment and two component paint material (amine solidify epoxy paint, p...
113
2018 - 09 - 25
Nowadays, with the development of science and technology, spring has become a very important hardware accessory in our life. Different products use different springs, and the longest used springs can be roughly divided into: pull spring, twist spring, press spring, disc spring and plate spring.The following features of a very practical tension spring:Many different products or hooks are used to guarantee the source of the tension of the tension spring. The tension spring works in the opposite way to the compression spring. The tension spring works in the opposite way when stretching or pulling...
114
2018 - 10 - 10
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 ...
115
2018 - 10 - 20
After the end face grinding, if the free height, perpendicularity, pitch and outside diameter of the spring do not meet the deviation specified in the pattern, the screw compression spring often needs to be corrected.Calibration operations are generally manual or semi-manual.The commonly used tools are: the spring with the metal wire above 4mm, multi-purpose manual pressure machine, splitting machine, press and so on;For springs with wire under 4mm, special tools, pliers and hammers with wedge edge are often used.Calibration is to use these tools to make the spring locally plastic deformation ...
116
2018 - 11 - 02
Zinc electroplating: zinc is stable in dry air and changes little. A white film of zinc oxide or carbon zinc carbonate is formed in moist air. This dense film will prevent further corrosion. Therefore, the galvanizing layer is used for the spring corrosion protection under general atmospheric conditions. Zinc coating should not be used for all springs that are in contact with solutions such as sulfuric acid, hydrochloric acid and caustic soda, as well as springs that work in humid air such as sulfur trioxide.Generally, passivation of galvanized coating can improve the protective performance of...
117
2018 - 04 - 18
To grow the business, we need to develop management expertise and innovation across the team.Thia is the picture of AFR team development activity in one of the shenzhen beach, From the faceof young team,  we can see the confidence and what they want to achieve!
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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 / 17
点击次数: 40
Detection of the characteristics of 7.2 torsion springsWhen measuring torque, the size of the torsional spring axis must be suitable. The inner diameter of the spring should be kept to a certain gap, and the friction force and friction torque caused by the contraction of the inner diameter of the spring should be avoided, and the measurement accuracy should be affected. But the spindle can not be too small, otherwise it will cause the offset between the external torque and the measuring torque center, resulting in the error of the torque measurement. The specific testing program for torsion spring torque: in addition to the pattern, the spring twists the spring to three times of the torsion angle corresponding to the allowable bending stress; the spring is worn in the test bar, the diamete...
作者: nelson
发布时间: 2018 / 08 / 16
点击次数: 46
7. Detection of the characteristics of cylindrical helical spring7.1 detection of the characteristics of tension and compression springsThe characteristics of the characteristic tensile and compression springs of the 7.1.1 spring should be in accordance with the characteristics of the spring. Under the load of the specified height (or length), the deformation of the spring should be between the 20%~80% of the deformation amount under the test load, and when the I class precision is required, the deformation of the spring should be above 4mm at the specified height load. It should be between 30%~ 70% of the deformation amount under the test load.7. the load and stiffness of 1.2 spring load and stiffness can be detected by the spring tension test machine, and the large spring can be tested o...
作者: nelson
发布时间: 2018 / 08 / 16
点击次数: 260
6.1.10 detection of parallelism between ends of springs: the spring is placed vertically on the plate.The difference between the maximum and minimum values of the surface of the end ring is measured by the dial indicator. The difference between the maximum and minimum values is the parallelism deviation between the ends of the spring.6.1.11 spring straightness detection: put the spring level on the plate and roll one.Zhou, determine its maximum bending position and measure the gap between the maximum bending point and the flat plate with a feeler gauge.The measured gap is the deviation of the straightness.Measurement of geometry size of 6.2 stretch springThe dimension of tensile spring is roughly measured: material diameter, free length and spring.The diameter, total number of rings, the r...
作者: nelson
发布时间: 2018 / 08 / 15
点击次数: 44
Detection of geometric size of 6.1 compression springs6.1.1 spring material diameter detection: check the spring material diameter generally with vernier caliper or micrometer. In particular, attention should be paid to the inspection of springs with small winding wires and annealed alloy wires wrapped by automatic spring coiling machines.6.1.2 spring free height or free length detection: the spring is generally placed in horizontal position measurement. It is allowed to be placed in erect position only when the self weight has no obvious effect on the height or length of the spring when it is confirmed that the spring is upright. When the free height or length of the spring is greater than 500mm, the gauge is measured by ordinary steel tape and measured with vernier caliper or height gaug...
作者: nelson
发布时间: 2018 / 08 / 15
点击次数: 38
1, Test classificationA) First inspection;B) Quality consistency check.2, A spring group of groupsThe spring shall be inspected according to the batch. Each batch shall consist of the same material specifications, grades, melting furnace numbers and springs made under the same technological conditions.3, First test3.1 The inspection of the production of the spring first piece must be carried out according to the test or inspection items specified in the drawings, and the determination of qualified and unqualified shall be made. 3.2 The first piece of spring must be checked and recorded in full. The inspector will inform the technician of the inspection result.4, Quality conformance testThe scope of application of the 4.1 whole test:4.1.1 Small batches of springs, such as less than 50 ...
作者: nelson
发布时间: 2018 / 08 / 14
点击次数: 26
(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 quenched and tempered steel because of the short induction heating time, small quenching microstructure and almost no decarburization layer on the surface of steel wire. The silk has a great improvem...
作者: nelson
发布时间: 2018 / 08 / 14
点击次数: 37
(4) the development of stainless steelChina is a big country in the production of stainless steel. With the production and development of stainless steel, many varieties have been developed naturally. At present, more than 50 kinds of stainless steel have been developed, which basically meet the needs of domestic production and development, and a brief description of some new varieties developed at present.1) the initial formation of austenitic stainless steel system. Low carbon austenitic stainless steel 0Cr18Ni9 and 00Cr17Ni2Mo2 have been developed to eliminate fatigue corrosion caused by carbon element. In order to improve its special properties, Cu, Ti, Nb, Mn, Cr, Si and N elements can be added.2) the development of nitrogen containing stainless steel. The results of nitrogen generati...
作者: nelson
发布时间: 2018 / 08 / 13
点击次数: 53
With the development of spring application technology, more requirements for spring materials are put forward. The main reason is to improve the fatigue life and anti relaxation performance under high stress; secondly, according to different uses, it is required for corrosion resistance, non magnetic, electrical conductivity, wear resistance, heat resistance and so on. In addition to the development of new varieties, the spring materials have achieved beneficial results in the aspects of strict control of chemical composition, reducing non-metallic inclusions, improving the surface quality and size accuracy.(1) development of the production process of spring steelIn order to improve the quality of spring steel, the industrial developed countries have generally adopted the refining technolo...
作者: nelson
发布时间: 2018 / 08 / 13
点击次数: 63
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...
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