HOT INFORMATION / More
1
2018 - 04 - 18
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.
2
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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...
3
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Stainless steel spring general precautions when washing, please pay attention to no surface friction to avoid the use of bleaching components and washing liquid containing abrasives, steel ball, grinding tools, etc., in order to remove the washing liquid, washing the end, rinse the surface with clean water.Surface state and washing methodDust and scaling - wash with soap or warm water.Label and film - scrub with warm water and weak detergent.Binder ingredients - use alcohol or organic solution;Fat, oil, lubricating oil contamination - with soft cloth or paper after drying with a neutral deterg...
4
2018 - 08 - 24
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.
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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...
6
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 ...
7
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...
8
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...
9
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...
NEW INFORMATION / More
1
2018 - 04 - 18
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.
2
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...
3
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...
4
2018 - 09 - 03
In order to remove the detergent, wash the surface with clean water at the end of washing.Surface condition and washing methodDust and easy to remove dirt - wash with soap, weak lotion or warm water.Label and film: scrub with warm water and weak detergent.Binder composition - using alcohol or organic solution;Fat, oil, lubricating oil contamination - with a soft cloth or paper after drying with a neutral detergent or ammonia solution or special detergent to wash;Bleaching agent and seed acid adherence - immediately rinse with water, soak in ammonia or neutral soda solution, then wash with neut...
5
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...
6
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...
7
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...
8
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...
9
2019 - 12 - 11
A compression spring comes in many configurations, shapes and sizes. They are conical, hourglass and barrel of varying lengths—and can be used as a shock absorber, vibration damper, a pure energy accumulator, or force generator. Because of their versatility, how efficiently they store energy and the multiple shapes in which they can be manufactured, these types of mechanical springs have a wide selection of applications.In the automotive industry, compression springs are used throughout the vehicle. In the medical applications , compression springs are used as parts in assemblin...
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Coil extension, torsion spring manufacturing

日期: 2018-11-02
浏览次数: 577
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Cylindrical spiral spring structure

There are three types of cylindrical spiral spring:

1. Cylindrical spiral compression spring

1) spacing between springs

Let the spring's pitch be p;The diameter of the spring wire is d;In the free state, there should be proper spacing between the circles.In order to make the spring still maintain a certain elasticity after compression, it is also necessary to ensure that there is a certain gap of 1 between each circle under the maximum load.The size of lens 1 is generally recommended to be: in addition 1=0.1d or greater than 0.2mm

2) dead circle

The two ends of the spring are closed with the adjacent ring (no gap), which only supports the spring without deformation.When the number of working rings of the spring is less than or equal to 7, the dead ring at each end of the spring is about 0.75.When n BBB 0 7, the dead ring at each end is about 1 ~ 1.75 turns.

3) end structure

YI type: both end face rings are tightly connected with the adjacent ring and are ground flat on the special grinding machine;

YII type: when the spring wire is heated and wound, both ends of the spring wire are forged flat and tightly connected with the adjacent ring (the end ring can be ground or not ground);

YIII type: both ends of the ring with the adjacent ring and do not wear smooth

In important cases, YI type should be used to ensure that the two supporting ends are perpendicular to the spring axis, so that the spring is not askew when under pressure.When the diameter of the spring wire is less than or equal to 0.5mm, the two supporting end faces of the spring need not be polished.For the spring of d BBB 0 0.5mm, the two supporting end faces shall be ground.The grinding part shall not be less than 3/4 of the circumference.The thickness of the end should not be less than d/8, and the roughness of the end surface should be less than

2.Cylinder coil drawing spring

1) end hook type

For easy connection, fixation and loading, the stretch spring is provided with a hook at both ends.

LI and LII hooks are easy to make and widely used.However, due to the large bending stress generated at the transition point of the hook, it is only suitable for the spring whose diameter of the spring wire is d or less than l0mm.

LVII and LVIII hooks are not combined with spring wires, so there are no disadvantages of the aforementioned transition. Moreover, the hooks can be turned to any direction for easy installation.It is better to use the LVII hook for heavy duty applications, but it is more expensive.

Coil extension, torsion spring manufacturing

2) stretch spring with prestress

When the cylinder coils are unloaded, the rings should be closed to each other.In addition, in order to save the axial working space, and ensure that the springs in the no-load time each ring compresses each other, usually in the winding process, and at the same time make the spring wire around its own axis to generate torsion.The spring made in this way, each ring has a certain pressure on each other, and a certain prestress is produced in the spring wire, so it is called.This kind of spring must be larger than the initial tension of F0, after each ring began to separate, so that no prestressed stretch spring can save the axial working space.

3. Spiral torsion spring

The torsion spring is provided with a lever arm at both ends for easy connection, fixation and loading:

The cylindrical spiral spring is manufactured

The manufacturing process of spiral spring includes: a) rolling;B) the making of the hook or finishing of the face ring;C) heat treatment;D) process test and strong pressure treatment.

Coiling is the winding of spring wire to the mandrel according to the technical requirements.In mass production, it is rolled on universal automatic spring coiler;Single piece and small batch production, in the ordinary lathe or manual winding machine winding.

There are two kinds of rolling: cold roll and hot roll.The cold coil is used for spring wire with diameter d<(8 ~ 10)mm drawn after pre-heat treatment.Stronger springs made of larger diameter spring filaments use hot coils.Hot coil when temperature varies with the thickness of the wire spring in the range of 800 ~ 1000 ℃.The pitch of the spring should be adjusted according to the specific situation, no matter using cold roll or hot roll.

After the above procedure, the spring should be heat treated.The surface of the spring after heat treatment should not have a significant decarburization layer.The spring after the cold coil is tempering only to eliminate the internal stress of the coil.

In addition, the spring must also carry out the process test and the test of precision, impact and fatigue according to the technical conditions of the spring to check whether the spring meets the technical requirements.It should be noted that the durable strength and impact strength of the spring depend to a large extent on the surface condition of spring wire, so the spring wire surface must be smooth and clean without defects such as cracks and scars.Surface decarburization will seriously affect the material's lasting strength and impact resistance.Therefore, the depth of decarburization layer and other surface defects shall be specified in the technical conditions for the acceptance of spring.Important springs shall also be treated with surface protection (e.g. galvanized);A common spring is usually painted with oil or paint.

For important springs, there is also a strong pressure treatment.In order to generate plastic deformation and residual stress in the critical area of the spring wire section, the spring is loaded continuously for 6 ~ 48 hours under the action of ultimate load.Because the residual stress is opposite to the working stress symbol, the maximum working stress of the spring treated with strong pressure is small.If treated by shot peening, increase by 20%.However, springs used in long term vibration, high temperature and corrosive media, as well as springs in general use should not adopt this strengthening process.

Spiral drawing and torsion spring manufacturing, except a few manufacturers in the introduction of foreign CNC CNC spring forming machine last automatic forming process various types of stretch, torsion spring.Most manufacturers still use traditional processing methods to manufacture, now a simple introduction.

1. Coil stretching spring.The process is basically the same as that of the spiral compression spring, except the hook ring processing at the end. The forming method of the stretching spring is as follows:

1) the same method as the screw compression spring is used to conduct de-stress annealing after winding forming, and then the hook ring is processed. In addition to the special shape of the hook ring or the spiral stretching spring with high initial tension is used for lathe winding or manual rolling, most of the springs are rolled by automatic spring winding machine.Coil extension, torsion spring manufacturing

2) coil with straight end spring machine.It is a vertical vertical spindle winding machine.After rolling, de-stress annealing and then hook and ring processing.The end structure of coiled stretch spring has many forms and processing methods.Commonly used are: small spring using plier-type special tools or special process equipment for manual processing;The normal spiral stretching spring is processed by the hook or die by manual or automatic operation.The stretching spring of the long arm hook ring is usually the length of material needed for the draw hook to be left out when winding, or the number of rings needed for processing after winding, the two ends are straightened with the straightening tool, and then the hook ring is bent with the special tool.The process specification for de-stressing annealing is described above.After the spring coiling is done, stress relief annealing is carried out first, and then cut off and hook ring processing is carried out. After the hook ring processing is completed, the stress relief annealing should be carried out one or two times in general.In order to prevent two carabiners relative Angle changes, therefore, when the stress relieving to shackle is processed temperature is better than rolling after the low temperature of 20 ~ 30 ° C.Coiled extension springs are generally not shot blasting and tension treatment.

2. Spiral torsion spring.Its craft and spiral compression, tensile spring are basically the same, different embedded instant kang also raise agent ぁ?In the case of small batch production and complicated torsion arm, most of the torsion arm is formed by manual or semi-automatic winding spring method, and then the torsion arm is processed according to the pattern requirements with the jig.In the mass production, it can be rolled on the straight-tail coil spring machine and the special machine for torsion spring. If the torsion arm cannot be completed according to the pattern, it can be processed by the work installation and clamping device.According to the characteristics of the helical torsion spring, the following two points should be noted in the design and manufacture:

1) the twist arm of the end of the spiral torsion spring shall be bent once during manufacturing to avoid machining defects and correct shaping.The second stress relief annealing should be carried out after the torsion arm processing.

2) the current helical torsion springs are mostly close coils, in this way, a compressive force similar to the initial tension of the stretching spring is generated between the spring coils. Friction will be generated during loading and unloading, and hysteresis will occur.It also brings difficulties to the surface treatment process.Therefore, in the design and forming, the spring coil should be slightly left between the gap.In mass production, under conditions, the manufacturer can adopt hydraulic and pneumatic methods to process the spiral drawing, torsion spring expansion, bending and hook.


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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 into a plane of the spiral of a spring, the spring is fixed at one end, the other end of the material after acting torque bending torque, bending elastic deformation, so the spring in its own plane to p...
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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 noted that if critical force-versus-deflection linearity is required, only the center 60-80% of the available deflection range should be employed.Thus, reserve at least the first and last 15-20% of t...
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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 Steel SpringsStainless steel springs have low-stress relaxation and resist corrosion. They have good strength at moderate temperatures and are resistant to heat. Extension springs are most commonly made from stainless steel.Extension springs absorb energy and provide resistance to pulling. As the name suggests, an extension spring stretches as a load is applied to it. Applications for extension springs include carburetors, trampolines and farm machinery.Oil Tempered Spring WireOil tempered wire is cold drawn and heat treated before plating. Ideal as a general purpose spring wire, it is often us...
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