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Automatic spring winding process

2018 . 09 . 28

87

Daisy

The diameter of wire wound by automatic spring machine is 0.2-3mm, and the adjustment process is as follows:1. Calibrate the feeding roller and winch to fit the diameter of steel wire and install the pitch wedge and cutting knife.2. Insert the steel wire into the spring machine and press the pressure plate and feeding roller.3. Adjust the distance of winding xiao zi, control the diameter of spring, and adjust the pitch wedge and xiao zi Angle to control the spring pitch and parallel head.4. Install an appropriate cutter, adjust the feeding CAM according to the spring expansion length, cut off the CAM, and adjust the pitch wedge CAM according to the effective number of turns.5. Aim the cooling liquid nozzle at the work object and install the baffle to prepare for winding.6. Spring process: ...

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Matters needing attention when choosing custom spring

2018 . 09 . 27

64

Daisy

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 of the exclusive mechanism parts are mostly made to professional spring manufacturers.If you can't design it yourself, you can pay the manufacturer to do it.In recent years, CNC computer control or...

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Spring not in place and failure reasons

2018 . 09 . 27

77

Daisy

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 longer shortened, that is, the spring is "positioned".The spring is permanently deformed after initial compression.In practice, the spring should maintain its working length even if it is subj...

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Spring material selection method

2018 . 09 . 26

128

Daisy

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 springs, should be preferentially used steel wire, cold-drawn steel wire such as strengthened steel wire, lead bath and oil hardened tempered steel wire, which has higher strength and good surface qua...

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127

Summary of spring parameters and symbols (Part I)

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...

128

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...

129

How to protect the surface of the spring?

2018 - 08 - 27

Core tip: the surface of spring can be generally treated, such as blackening (blue), phosphating, electroplating, spray molding, etc. In recent years, the zinc chromium film dacroa DACROMET dacroa protective layer has excellent corrosion resistance, which is 710 times the corrosion resistance of the traditional electroplating layer, and there is no hydrogen embrittlement in the electroplating process. Generally, the surface of springs can be treated, such as blackening (blue), phosphating, electroplating, spray molding, etc. In recent years, the zinc chromium film "dacrom DACROMET da...

130

History of spring

2018 - 09 - 11

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...

131

The difference between compression springs,tension springs and torsion springs

2018 - 09 - 21

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 usual...

132

The fixing (stabilization) of the spring

2018 - 10 - 08

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 ca...

133

Use the properties of the spring properly

2018 - 10 - 18

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,...

134

Types of Springs and their Applications

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...

135

Constant Force Spring

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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127

Common specifications of spring

2018 - 08 - 09

The number of diameter length is described!(1) the diameter of the spring wire d: is the wire diameter of the spring. (2) the maximum outer diameter of the spring outer diameter D: spring. (3) the inner diameter of the spring D1: the smallest outer diameter of the spring.(4) the middle diameter of the spring D2: the average diameter of the spring. Their formula is: D2 = (D + D) = 2 = D 1 + D = D D.(5) apart from the support ring, the distance between the two adjacent circles of the spring corresponding to the axial distance of the point on the middle diameter is t:, and is expressed ...

128

What is the salt spray test?

2018 - 08 - 23

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...

129

Analysis of deformation prevention measures for heat treatment of metal spring(part 2)

2018 - 09 - 07

In the heat treatment of forgings, the way of placing parts to reduce deformation is to hang them vertically as far as possible, to place them vertically at the bottom of the furnace, to support them horizontally with two points, to place the fulcrum between one-third and one-fourth of the full length, and to place them flat on the heat-resistant steel tooling.In the cooling process of parts, the types, cooling properties and hardenability of quenching medium are related to deformation. The change of cooling performance can be adjusted by changing the viscosity, temperature, liquid pressure, a...

130

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 ...

131

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...

132

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...

133

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...

134

Spring Design

2019 - 12 - 30

Spring design and its fabrication play an important role in manufacturing and industry around the globe. Springs come in all shapes and sizes to meet industry needs and are made from a wide range of metal alloys. Materials used for spring design and wire forming consist of high strength alloys.In general, wire formed into springs is cold rolled or drawn, and a made of medium to high carbon steel with high yield strength that allows for excellent elastic properties.Mechanical PropertiesThe mechanical principles of springs are very basic. They are an elastic component. Potential mechanical ...

135

Inspection content and specification for spring parts(part 4)

2018 - 07 - 30

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...

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Hot News / 热点新闻

Constant Force Spring

2020 . 01 . 13

点击次数: 139

Compression Springs

2020 . 01 . 13

点击次数: 139

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: 83

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...

Summary of spring parameters and symbols (Part 4)

作者： Nelson

发布时间： 2018 / 08 / 02

点击次数： 69

M- mass of the object acting on the spring (kg)Ms- spring mass (kg) N- variable load cycle number N- spring working circle Nz- spring support ring number N1- total number of turns of the spring P'- Spring single ring stiffness (N/mm) R- The middle radius of the coil (mm) R1- inner radius of the coil (mm) R2- outer radius of the coil (mm) R- damping coefficient S- safety factor T-torque; torque (Nmm) T'- torsional stiffness (N-mm /(0))T- spring momentTc- cable pitch (mm)U- deformation energy (N: mm); (N: mm-rad) V-spring volume (mm3) V- Impact body speed (mm/s) Zm- bending section coefficient (mm3) Zt- torsional se...

Summary of spring parameters and symbols (Part 3)

作者： nelson

发布时间： 2018 / 08 / 02

点击次数： 55

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) G- gravitational acceleration, g=9800mm/s2 H-spring working height (length) (mm) Ho- spring free height (length (mm) Hs- high (long) degree (mm) under spring test...

Summary of spring parameters and symbols (Part 2)

作者： nelson

发布时间： 2018 / 08 / 01

点击次数： 706

The basic spring parameters of the spring:1. Spring wire diameter D: wire diameter of spring.2. The outer diameter of the spring D2: the maximum outer diameter of the spring.3. The inner diameter of the spring D1: the smallest outer diameter of the spring.4. The middle diameter of the spring is D: the average diameter of the spring. Their calculation formula is: D= (D2+D1) +2=D1+d=D2-d5, pitch T: except for the support ring, the distance between the two adjacent circles of the spring corresponds to the axial distance on the middle diameter of the spring, and is expressed by t.6, effective circle number n: the number of circles that the spring can keep the same pitch.7, the number of supporting rings N2: make the spring work in the J, ensure the vertical axis of the axis and manufacture, of...

Summary of spring parameters and symbols (Part I)

作者： nelson

发布时间： 2018 / 08 / 01

点击次数： 365

Inspection content and specification for spring parts(part 7)

作者： nelson

发布时间： 2018 / 07 / 31

点击次数： 58

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...

Inspection content and specification for spring parts(part 6)

作者： nelson

发布时间： 2018 / 07 / 31

点击次数： 63

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...

Inspection content and specification for spring parts(part 5)

作者： nelson

发布时间： 2018 / 07 / 30

点击次数： 70

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...

Inspection content and specification for spring parts(part 4)

作者： nelson

发布时间： 2018 / 07 / 30

点击次数： 41

Inspection content and specification for spring parts(part 3)

作者： nelson

发布时间： 2018 / 07 / 28

点击次数： 43

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...

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