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Penetration testing of springs

2018 . 10 . 22

194

Daisy

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 steel springs.(1) oil immersion test can be used for spring whose diameter of wire is greater than 8mm.The spring that has been cleaned on the surface is immersed in kerosene, or the mixture of 50% (mass ...

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The basis of spring material selection

2018 . 10 . 20

432

Daisy

1) the selection basis of environmental factors in the use state of spring products: corrosion resistance, acid corrosion resistance, alkali corrosion resistance, salt corrosion resistance, water corrosion resistance, etc.Weather resistance;Resistance to stress and corrosion, fatigue and corrosion, etc.Wear resistance;Temperature resistance, etc.Radiation resistance, etc.2) selection basis of load characteristics of spring products: dynamic pulse-type cycle load, variable load, impact load, corrosion fatigue load, static load, large load and fatigue load, etc.3) selection basis of mechanical properties and strength characteristics of spring products: tensile strength, yield strength or flexure ratio, hardness, thermal hardness, reduction of section, elongation, impact toughness, relaxation...

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Spring calibration process

2018 . 10 . 20

346

Daisy

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 to achieve the required size of the pattern.1、 application of calibration process1) outside diameter correction.In general, coil spring can guarantee the deviation of outer diameter, but when the spri...

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The manufacturing process of cold formed spring

2018 . 10 . 19

62

When the spring is made from materials that do not need to be hardened or tempered after forming, the process is spiral compression spring: rolling, de-stressed annealing, grinding of two ends, (shot blasting), (rectification), (de-stressed annealing), standing or strong pressure treatment, inspection, surface anti-corrosion treatment, packaging.Coil stretching spring: rolling, de-stress annealing, hook making, (cutting the tail), de-stress annealing, standing treatment, inspection, surface anti-corrosion treatment, packaging.Spiral torsion spring: rolling, de-stress annealing, torsion arm making, cutting tail, de-stress annealing, standing treatment, inspection, surface anti-corrosion treatment, packaging.The manufacturing process of spiral drawing and torsion spring described above is to...

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Testing spring residual stress

2018 - 09 - 19

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 ...

Metal spring plays an important role in safety valve

2018 - 09 - 29

The spring relief valve is mainly composed of spool, seat, stem, spring and adjusting screw.The relief valve mainly USES spring force to press the spool on the seat.When the boiler pressure exceeds the pressure exerted by the spring on the upper part of the spool, the spool and stem are lifted and steam is discharged.When the boiler pressure is lower than the spring pressure acting on the upper part of the spool, the spool falls on the seat and the boiler stops discharging steam.The spool is a cone with a slight protrusion around the edge of the spool.When the steam opens the valve core, the e...

Definition and classification of spring steel

2018 - 10 - 16

A, definitions,Spring steel refers to the steel specially used to make spring elastic elements due to its elasticity in the quenching and tempering states.The elasticity of steel depends on its elastic deformation capacity, that is, within the specified range, the elastic deformation capacity makes it bear a certain load, and no permanent deformation occurs after the load is removed.Spring steel shall have excellent comprehensive performance, such as mechanical properties (especially elastic limit, strength limit and yield ratio), anti-elastic and anti-elastic properties (i.e. anti-elastic and...

Compression spring

2018 - 10 - 26

Most widely used, in manufacturing, the spiral wound into a separate ring, so that each ring gap (pitch), so that force contraction, to maintain tension to the two ends.When under the maximum load, it cannot be completely compressed, and the gap must be kept between effective turns to avoid friction or other material embedding, causing fatigue damage.The free length of the spring should be equal to the solid length of the spring plus the gap and the amount of deformation.To increase the contact surface of the compression spring, the surface should be ground to obtain 60~80% contact surface.Its...

The passivation process for springs

2019 - 12 - 30

1、What is Passivation?As a post-fabrication method, passivation is intended to maximize the natural corrosion resistance of stainless steel. Stainless steel is a steel alloy that contains a minimum of 10.5% chromium content by mass and along with a number of other alloys. When stainless steel is newly formed it needs to be cleaned of lubricants, oils, greases and other substances used in its fabrication. Once the steel has been cleaned it must be passivated. Passivation is a process that treats metal surfaces with an acid solution to make the surface corrosion resistant.Passive to atmospheric ...

Each of these types can be further characterized.

2018 - 04 - 18

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 i...

Inspection content and specification for spring parts(part 5)

2018 - 07 - 30

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 sp...

History of spring

2018 - 08 - 13

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...

Each of these types can be further characterized.

2018 - 08 - 24

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What is the fall of autumn?

2018 - 08 - 07

What is the fall of autumn?The fall of autumn, the thirteenth throttle of the twenty-four solar calendar in the lunar calendar, is the first throttle of autumn, marking the official start of the season of Meng Qiu: "autumn" means the summer to cool. By the beginning of autumn, the Chinese parasol trees began to shed their leaves. From the point of view of writing, the word "Qiu" is composed of grass and fire characters. Autumn is a transitional season from hot to cool and then from cold to cold.The fall of autumn, July. A word can be found in spring. Autumn is the same.At t...

Inspection content and specification for spring parts(part 6)

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...

Analysis of deformation prevention measures for heat treatment of metal spring

2018 - 09 - 04

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...

Hardness testing method for tempering heat treatment

2018 - 09 - 17

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...

Matters needing attention when choosing custom spring

2018 - 09 - 27

In order to make it convenient for customers to buy and custom spring, some brief introduction about spring and specification parameters are summarized as follows:The common spring can be classified as: stretching spiral spring, compression spiral spring and torsion spiral spring.Among them, stretch and compression springs are mostly produced in quantity, with complicated specifications but suitable for slight modifications. If a small amount of springs is needed and the characteristics of springs are not critical, they can be purchased easily in the market with a higher unit price.The users o...

Spring manufacturing process

2018 - 10 - 12

There are many ways of making spring, but the main forming part is cold forming and hot forming.In spring in the cold forming process, the spring mainly made by oil material toughening, lead bath quenching tempering spring wire, cold drawn wire, etc., using this kind of material in the manufacturing process of spring generally do not need special heat treatment and only requires the stress relieving, adopted by the spring design work stress and material performance.Spring cold forming process is generally suitable for special-shaped spring with small line diameter or more complicated shape, su...

Wire forming spring

2018 - 10 - 23

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 ela...

Torsion Spring Performance

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) ...

Manufacturing of Springs

2018 - 04 - 18

Springs can also be classified by how they’re made. The first spring that comes to most people’s minds is probably a metal coil spring, also known as a helical spring. However, there are many other types. Even an elastic band can be considered a variable rate spring, since it stores mechanical energy.Coil SpringsLightweight coil springs are made by forming metal wires on an CNC coiling machine. The multi-axis CNC control allows you to create variable pitches and end conditions only limited by your imagination. Springs that come off the coiling machines do not have springy properties. They need...

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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...

Properties of spring material

作者： Daisy

发布时间： 2018 / 09 / 22

点击次数： 122

1) high strength: in order to improve the spring's ability to resist fatigue failure and relaxation, the spring material should have a high yield strength and elastic limit, and in particular, a high ratio of strength to strength.In general, the elastic limit of the material is directly proportional to the yield strength, so the spring design and the manufacturer always want the material to have a high yield strength.The tensile strength and yield strength of the spring material are close, for example, about 90% of the carbon steel wire of cold drawn is about: since the tensile strength is easier to be measured than the yield strength, the tensile strength is provided in the delivery of the material, so the tensile strength is generally used as the basis in design and manufacture.Howev...

The difference between three common springs

作者： Daisy

发布时间： 2018 / 09 / 22

点击次数： 83

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 divided into three kinds: spring, spring and spring.Compression spring compression spring (springs) is under axial pressure of the spiral spring, it is used in the data section for more rounded, useful...

The difference between compression springs,tension springs and torsion springs

作者： Daisy

发布时间： 2018 / 09 / 21

点击次数： 71

compression spring is under axial pressure of the spiral spring, it is used in the data section for more rounded, useful also rectangle and multi-strand steel rolled a travelling, spring is usually pitch, such as the shape of the compression spring are: cylindrical, conical, convex and concave and a small amount of noncircular, compression spring there is a certain gap between circle and circle, when under external load spring contraction deformation, deformation energy storage.The tension spring is a spiral spring that bears the axial tension.When there is no load, the stretch spring is usually closed between the coil and the coil.It is widely used in machines and instruments to control the movement of the parts, to store energy and to measure the force.The hook is made of side hook sprin...

Discussion on the advantages of compressed spring products

作者： Daisy

发布时间： 2018 / 09 / 21

点击次数： 75

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 sound, you don't need to use a lot of power, can make the speed of the car, this is the charm of compression spring, because it's there, so now in the car production technology is more and more...

The corrosion of spring can be divided into chemical corrosion and electrochemical corrosion accordi

作者： Daisy

发布时间： 2018 / 09 / 20

点击次数： 78

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 is a chemical corrosion.If the spring is in contact with the electrolyte solution, the corrosion caused by the action of the micro battery is called electrochemical corrosion.For example, the spring is...

Basic knowledge of spring compression amount of die

作者： Daisy

发布时间： 2018 / 09 / 20

点击次数： 98

The purpose of mold spring is to take off material, press material, the strength of the spring, which is related to whether the mold production is smooth, whether the product is qualified.Spring force is small, may cause the product to be out of shape, the mold does not take off the material, the product is bad to take out from the mold inside, the belt material, the knife edge, punch easy to wear and so on each kind of question.Mold spring according to different production times, compression amount selected, the larger the spring life, the shorter die life, of course, the broken spring can be replaced, but the specifications of each spring are different, the design has been determined, springs in use do not easily replace each other.The moulds may run out of steam for a while, and the spr...

Testing spring residual stress

作者： Daisy

发布时间： 2018 / 09 / 19

点击次数： 79

Spring machine regular maintenance and daily maintenance is very important

作者： Daisy

发布时间： 2018 / 09 / 19

点击次数： 100

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 of production. At this time, we should pay attention to the maintenance of the machine parts. Some seriously worn parts should be replaced in time.In the process of use, the inner part of the spring ma...

Penetration testing of springs

作者： Daisy

发布时间： 2018 / 09 / 18

点击次数： 65

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 steel springs.(1) oil immersion test can be used for spring whose diameter of wire is greater than 8mm.The spring that has been cleaned on the surface is immersed in kerosene, or the mixture of 50% (mass ...

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