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Spring-shot technology requirements

2018 . 10 . 19

414

Daisy

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 of the spring parts shall not exceed 250~E, and the heating temperature of the spring parts shall not exceed 400~C for stainless steel.2) the spring after shot peening is allowed to be modified mechani...

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Use the properties of the spring properly

2018 . 10 . 18

394

Daisy

With the rapid development of technology, spring's figure is everywhere, playing an irreplaceable role in all walks of life.How to use the properties of the spring itself according to local conditions will be today's small talk about the content.Spring measuring functionWe know that, within the elastic limit, the extension (or contraction) of the stretching spring, compression spring, torsion spring, bending spring, spring and spiral spring is proportional to the force.A spring scale is made from the property of a spring.Spring compression functionObserving various electrical switches, it is found that one of the two contacts of the switch must have a spring in the head to ensure that the two heads are in close contact and conduct well.If the contact is not good, the resistance at ...

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Points to note when using a extension spring

2018 . 10 . 18

293

Daisy

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 fracture.Iii. Tensile spring fatigue fractureSpring fracture under cyclic loading.Iv. Hydrogen embrittlement, cadmium embrittlement and black embrittlement:Brittle break due to high content of impurit...

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The chemical protective layer of the spring

2018 . 10 . 17

303

Daisy

A compact protective film is formed on the surface of the spring by chemical reaction to prevent the corrosion of the spring.Generally, oxidation treatment and phosphating treatment are used.Oxidation treatment and phosphating treatment have low cost and high production efficiency. Generally, spring manufacturers adopt oxidation treatment as corrosion prevention treatment.1.Oxidation treatment of steel is also known as bluing, blackening and boiling black.After oxidation treatment, the surface of the spring produces protective magnetic iron oxide, which is generally blue or black or sometimes dark brown.The color depends on the surface state of the spring, the chemical composition of the spring material and the oxidation process.The methods of oxidation treatment include alkaline oxidation...

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Surface treatment of spring equipment prolongs service time

2018 - 09 - 10

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 state.If the metal on the surface of the spring simply reacts with the surrounding medium, and the spring causes corrosion, it is called chemical corrosion.For example, the spring is oxidized in the particularly dry atmosphere to form an oxidation film, and the spring is chemically changed with the liquid or impurity in the non-electrolyte liquid, which i...

Discussion on the advantages of compressed spring products

2018 - 09 - 21

Compression springs are frequently seen and used in daily life. The main principle of compression springs is to provide a hand to the machine and drive it to work.The compression spring has a certain damping capacity, because the product's elastic force is not a fixed value, so every time it is used, there will be a return force, and the force is not a fixed size, which to some extent has the ability to slow down the vibration.As an example, now the car is installed above a compression spring, you will find when driving, its speed is greatly improved, and the movement process there is no s...

Oxidation treatment of spring surface

2018 - 10 - 08

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 ma...

Points to note when using a extension spring

2018 - 10 - 18

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 ...

How to choose spring wire

2018 - 11 - 01

1) make it clear whether to use raw drawn steel wire or lead hardened steel wire;2) propose the requirements of steel wire diameter, strength grade (group) and standard number (select according to table 1.1);3) if there are special requirements such as strength and diameter allowable error, etc. (standard parameters are in parts 2 and 3);4) special packaging and marking requirements (see 1.4);5) carbon steel spring suitable for long-term work under the condition of temperature 121 ℃, highest working temperature should be chosen alloy spring steel.3 special needsShaped cross section: square, re...

Compression Springs

2020 - 01 - 13

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 in other needed forms such as conical, concave (barrel), convex (hourglass), or various combinations of these. Compression springs are used to resist force and/or store energy,1、CharacteristicsBy far the most widely used type of spring, compression springs are designed to oppose compression and return to its uncompressed length when the applied force is removed. 2、Service LifeIt should be...

The position and future of the spring in the manufacturing industry

2018 - 07 - 13

Although the spring industry is a small industry in the whole manufacturing industry, its role must not be underestimated. The industrial manufacturing industry and the automobile industry in the country should accelerate the development, and the spring industry, as one of the basic parts and parts, needs to have a development over the early stage to adapt to the rapid development of the country's whole industry. In addition, the expansion of the spring product variety and the improvement of the quality level are also the needs of the replacement of machinery and equipment and the imp...

Inspection content and specification for spring parts(part 7)

2018 - 07 - 31

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...

The development course of spring material (Part 3)

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...

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Types of Springs and their Applications

2018 - 08 - 21

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...

Analysis of deformation prevention measures for heat treatment of metal spring(part 1)

2018 - 09 - 07

There are two types of heat treatment deformation: one is the size change, the other two is the change of part geometry. Different methods of heat treatment, deformation and deformation prevention of parts size and geometry are also different.The longer the holding time and the higher the temperature are, the more carbon is dissolved into austenite and the larger the expansion of martensite is. The expansion of martensite is the largest, followed by upper bainite, and the volume change of lower bainite and troostite is very small. At low temperature tempering, martensite shrinks and the amount...

Spring machine regular maintenance and daily maintenance is very important

2018 - 09 - 19

Spring machine is now in the production of spring necessary equipment, due to the abundant of spring and the increase of precision is also more and more high to the requirement of spring machine, the spring machine maintenance is particularly important at ordinary times, and the main factors affecting the service life of spring machine has two, one is the operator of whether scientific and standardized operation, another is reasonable in daily maintenance.After using the spring machine for a period of time, the efficiency of the machine will be significantly reduced, affecting the efficiency o...

Analysis of spring corrosion

2018 - 09 - 29

Selection of spring material

2018 - 10 - 16

The selection of spring material shall be determined according to the properties of the spring bearing load, stress state, stress size, working temperature, environmental medium, service life, requirements for conducting and magnetic conductivity, technical performance, material source and price, etc.When determining the shape and size of the material section, the series sizes specified in the national standards and ministerial standards should be selected first, and non-standard series of materials should be avoided as far as possible.Medium and small-sized springs, especially spiral-tension ...

Proper use of the spring

2018 - 10 - 26

Please avoid the improper way of using (1) more than the use of the maximum compression (300000 back to the conditions, after a close with the use of a long) stress causing the wreck, close to close with the use of a long, can make the spring line department gradually close to that, because of the high spring constant change caused by load curve with high, nearly and produce high stress to make spring break, please do not use more than 300000 times.The use of the spring without prepressure due to the gap caused the spring up and down vibration caused the spring distortion, if there is prepress...

Precision metal spring

2019 - 12 - 23

Precision metal stamping is a cold-form manufacturing process that converts metal sheets into desired shapes—be it parts, components, or finished products—for a variety of applications. In metal fabrications shops or manufacturing operations, metal sheets, known as blanks, are fed through the tool and die surface of stamping presses to shape and shear the blanks into a finished three-dimensional object. Precision metal stamping services allow for mass production of complex parts in any quantity for nearly all industry. The automotive industry, in building and construction,...

Inspection content and specification for spring parts(part 2)

2018 - 07 - 28

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...

A brief history of the development of Hooke's law

2018 - 08 - 09

At first, during the experiment, Hooke found that the weight added to the spring was proportional to the elongation of the spring, and he tested his conjectures by many experiments. In 1678, Hooke wrote a spring paper, which introduced the results of experiments on elastic objects, laying the foundation for the development of material mechanics and elastic mechanics.Spring dynamometerIn the early nineteenth Century, under the premise of a lot of experimental work in the former, British scientist Thomas Yang summed up the research results of Hooke and others, pointing out that if the elongation...

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Hot News / 热点新闻

Constant Force Spring

2020 . 01 . 13

点击次数: 163

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...

Compression Springs

2020 . 01 . 13

点击次数: 159

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...

Spring wire materials

2020 . 01 . 06

点击次数: 116

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...

How to choose spring wire

作者： Daisy

发布时间： 2018 / 09 / 18

点击次数： 75

Hardness testing method for tempering heat treatment

作者： Daisy

发布时间： 2018 / 09 / 17

点击次数： 80

Hard inspection method for chemical heat treatment and surface quenching and temperingSurface heat treatment is divided into two categories, one is chemical heat treatment and the other is surface quenching and tempering heat treatment. The hardness test method is as follows:1. Chemical heat treatmentChemical heat treatment is to make the workpiece surface infiltrate one or several chemical elements of the atom, thereby changing the workpiece surface chemical composition, organization and performance.After quenching and tempering, the surface of the workpiece has high hardness, wear resistance and contact fatigue strength, and the core of the workpiece has high toughness.The main technical parameters of chemical heat treatment workpiece are the depth of hardened layer and surface hardness....

Knowledge of metal structure and heat treatment

作者： Daisy

发布时间： 2018 / 09 / 17

点击次数： 75

(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 another element, while a solid metal crystal of the lattice type of the other element remains.5. Solid solution strengthening: as solute atoms enter the gap or junction of solvent lattice, the lattice is di...

Study on factors influencing decarburization of 55SiCr surface of spring steel during heating

作者： Daisy

发布时间： 2018 / 09 / 14

点击次数： 106

55SiCr is the high-grade steel used for automobile suspension springs. The suspension springs bear the reciprocating compression motion in the process of automobile driving, and play the role of buffer and shock absorption, which has high requirements on the performance of steel.Decarburization is one of the main problems in the hot processing of spring steel. Decarburization of spring steel surface will seriously damage the fatigue performance of spring, especially when the total decarburization of ferrite occurs on spring steel surface, the fatigue limit of spring can be reduced by 50%.At present, studies on decarburization of spring steel surface mainly focus on two influencing factors of heating temperature and heating time, while studies on the effect of heating furnace atmosphere on ...

Method for improving heat treatment performance

作者： Daisy

发布时间： 2018 / 09 / 14

点击次数： 53

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...

Introduction of heat treatment process -- surface quenching

作者： Daisy

发布时间： 2018 / 09 / 13

点击次数： 76

The surface of steel is hardenedIn some parts, the surface layer of the workpiece bears higher stress than the core under the action of alternating loads such as torsion and bending and impact loads.In the case of friction, the surface layer is also constantly worn. Therefore, high strength, high hardness, high wear resistance and high fatigue limit are put forward for some surface layer of parts. Only surface strengthening can meet the above requirements.Because surface quenching has the advantages of small deformation and high productivity, it is widely used in production.According to different heating methods, surface quenching mainly includes induction heating, flame heating and electric contact heating.Quench by induction heatingInduction heating is to use electromagnetic induction to...

Method of spring-surface paint

作者： Daisy

发布时间： 2018 / 09 / 12

点击次数： 96

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, polyurethane paint etc.) should not be used.Dip coating film is not smooth enough, easy to produce thin and thick, edge flow.(2) spraying method spraying is to use the spray gun to spray the paint into...

Spring machine regular maintenance and daily maintenance is very important

作者： Daisy

发布时间： 2018 / 09 / 12

点击次数： 66

Vibration damping spring is a commonly used elastic element

作者： Daisy

发布时间： 2018 / 09 / 11

点击次数： 54

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 the rectangle and the multi-strand steel entangle to coil.Spring is commonly pitch, such as the shape of the compression spring are: cylindrical, conical, convex and concave and a small amount of rubb...

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