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Spring-shot technology requirements

2018 . 10 . 19

407

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

393

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

290

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

300

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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Analysis of spring corrosion

2018 - 09 - 29

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...

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...

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 ...

Types of springs and their applications

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.

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...

How much do you know about the cleaning of stainless steel springs？

2018 - 08 - 10

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...

Types of springs and their applications

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.

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...

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Summary of spring parameters and symbols (Part 4)

2018 - 08 - 02

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 p...

Inspection content and specification for spring parts(part 3)

2018 - 08 - 16

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 ...

Review spring drawings, which items should be examined?

2018 - 08 - 31

Spring drawings should be audited as follows: geometric parameters audit; physical parameters audit; technical conditions audit.(1) geometric parameters include material size, spring diameter, spring coil number, free height, spring rotation and so on.(2) physical parameters include load, stiffness, theoretical value of deformation, tolerance and so on.(3) Technical conditions include geometric tolerance, heat treatment process requirements, surface treatment, elastic compression treatment and shot peening treatment.

Introduction of heat treatment process -- surface quenching

2018 - 09 - 13

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 differ...

Characteristics of torsion springs for spring equipment

2018 - 09 - 25

Torsion spring is a mechanical force storage structure, mainly used in ancient crossbow guns and other crossbow.The torsion spring accumulates the force through the twist or rotation of the elastic material with a relatively soft and pliable material, and makes use of it so that the projectile has certain mechanical energy.The modern torsion spring torsion bar is made of excellent elastic steel, and the form is also changed a lot, including the wire on the inner surface of the mechanical watch, the power spring in the toy gyroscope gun, as well as the torsion bar in the tank and car.Small...

The finish of the spring surface

2018 - 10 - 10

In recent years, the surface of the spring has been treated by the spring designers.The finishing (finishing) process is to put the spring directly into a series of finishing machines, such as tilting centrifugal type or spiral vibrating type, eddy current type, and add appropriate grinding materials, grinding agents and water for finishing.General optical finishing is about 20 to 30min. Specific optical finishing time depends on the spring shape and the amount of device.After finishing the finish, remove the spring and rinse it with tap water, then immerse in the SM series water film replacem...

The basis of spring material selection

2018 - 10 - 20

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 p...

The role of spring in driving mechanism of press machine

2018 - 11 - 03

In the transmission mechanism of the press, when the clutch and the brake adopt mechanical rigid interlock, as long as the air is set on the clutch.The cylinder, the air pressure ACTS on the piston of the cylinder to make the clutch friction pair fit, and to make the air pressure of the spring brake brake friction pair separate and not brake, so when the air cylinder enters, the brake friction pair should be separated first, and then the clutch friction pair fits to complete the combination.The friction pair separation of the clutch and the friction pair fitting of the brake are respectively a...

Pregressive hour

2018 - 04 - 18

We do cherish the time together with all of our esteemed customers. The picture shows the progressive hour withOne of our French customer who focus on the water purification system industry.

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Hot News / 热点新闻

Constant Force Spring

2020 . 01 . 13

点击次数: 105

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: 121

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: 58

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： 68

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, rectangle, hexagonal, etc.Annealing treatment: suitable for large deformation and plasticity, such as flattening and triangulation.Stabilization treatment: the steel wire will be straightened after bein...

Hardness testing method for tempering heat treatment

作者： Daisy

发布时间： 2018 / 09 / 17

点击次数： 77

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： 72

(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： 100

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： 49

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： 68

Method of spring-surface paint

作者： Daisy

发布时间： 2018 / 09 / 12

点击次数： 78

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： 64

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...

Vibration damping spring is a commonly used elastic element

作者： Daisy

发布时间： 2018 / 09 / 11

点击次数： 47

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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