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Spring-shot technology requirements

2018 . 10 . 19

411

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

291

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

301

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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Introduction of high precision equipment to improve production technology

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Method of spring-surface paint

2018 - 09 - 12

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, p...

Working characteristics of pressure spring

2018 - 09 - 25

Nowadays, with the development of science and technology, spring has become a very important hardware accessory in our life. Different products use different springs, and the longest used springs can be roughly divided into: pull spring, twist spring, press spring, disc spring and plate spring.The following features of a very practical tension spring:Many different products or hooks are used to guarantee the source of the tension of the tension spring. The tension spring works in the opposite way to the compression spring. The tension spring works in the opposite way when stretching or pulling...

Testing spring residual stress

2018 - 10 - 10

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 ...

Spring calibration process

2018 - 10 - 20

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 ...

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...

The development course of spring material (Part 3)

2018 - 07 - 24

(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...

The effect of the production process of the spring factory on the product

2018 - 08 - 03

Spring is no stranger to everyone. This element is seen everywhere in life. It is also one of the important parts of many industrial machinery equipment. There are many kinds, with different forms, specifications and sizes, and are widely used in the field. Now the spring plant is basically able to produce a variety of different springs. This component is made with special steel. The structure is relatively simple, but it is also required for the production process, so the manufacturer's production equipment and technology will affect the finished product.So if you need to choose a better ...

Inspection content and specification for spring parts(part 4)

2018 - 08 - 16

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...

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.

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Inspection content and specification for spring parts(part 6)

2018 - 07 - 31

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...

The development course of spring material (Part 1)

2018 - 08 - 13

With the development of spring application technology, more requirements for spring materials are put forward. The main reason is to improve the fatigue life and anti relaxation performance under high stress; secondly, according to different uses, it is required for corrosion resistance, non magnetic, electrical conductivity, wear resistance, heat resistance and so on. In addition to the development of new varieties, the spring materials have achieved beneficial results in the aspects of strict control of chemical composition, reducing non-metallic inclusions, improving the surface quality and...

History of spring

2018 - 08 - 25

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...

Surface treatment of spring equipment prolongs service time

2018 - 09 - 10

The corrosion of spring can be divided into chemical corrosion and electrochemical corrosion according to the type of reaction.They are the result of changes in the metal atoms on the surface of the spring or the loss of electrons to an ionic state.If the metal on the surface of the spring simply reacts with the surrounding medium, and the spring causes corrosion, it is called chemical corrosion.For example, the spring is oxidized in the particularly dry atmosphere to form an oxidation film, and the spring is chemically changed with the liquid or impurity in the non-electrolyte liquid, which i...

Discussion on the advantages of compressed spring products

2018 - 09 - 21

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

Oxidation treatment of spring surface

2018 - 10 - 08

The oxidation treatment of the spring (also known as bluish, blackened, cooked black, etc.) is mainly used to prevent the corrosion of the spring, and also to make the spring appearance bright.Oxidation treatment methods include: alkaline oxidation, alkali free oxidation and electrolytic oxidation.Spring oxidation treatment is often alkaline oxidation treatment, in the presence of oxidants (such as sodium nitrite) in caustic sodium solution.As the solution approaches the boiling point, the iron on the surface of the spring dissolves and forms sodium ferrite and sodium ferrite, which is then ma...

Points to note when using a extension spring

2018 - 10 - 18

For a long time, the shape and performance of the extension spring will change. If the extension spring is always in a certain situation, it may change its quality due to external conditions.Generally, there are the following situations:I. wear of extension spring :Wear can be divided into abrasive, fatigue and corrosion wear fracture.Ii. Brittle fractureThe majority of spring break belongs to brittle fracture.Plastic fracture is possible only when the working temperature is high.In engineering, fatigue fracture, stress corrosion fracture and hydrogen embrittlement fracture are called brittle ...

floor spring

2018 - 10 - 30

The ground spring is also a hydraulic door closer, except that it presses the spring with a worm gear rather than a rack and pinion.Because the worm wheel can be rotated in a positive and negative direction, the ground spring can be used for two-way open doors, while the door closer can only be used for one-way open doors.The technical key of the ground spring is the bearing seat at the lower part of the main shaft, which determines the bearing grade of the landing spring.Because the ground spring used for two-way doors carries the weight of the door, the weight of the door is crucial to the s...

Spring wire materials

2020 - 01 - 06

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 spr...

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Hot News / 热点新闻

Constant Force Spring

2020 . 01 . 13

点击次数: 139

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: 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

How to choose spring wire

作者： Daisy

发布时间： 2018 / 09 / 18

点击次数： 74

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： 80

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

Knowledge of metal structure and heat treatment

作者： Daisy

发布时间： 2018 / 09 / 17

点击次数： 75

(1) metal tissue1. Metal: it has good thermal and electrical conductivity with opaque and metallic luster, and its electrical conductivity decreases with the increase of temperature, and it is rich in ductility and malleability.A solid (or crystal) in which the atoms of a metal are regularly arranged.2. Alloy: a substance which is composed of two or more metals or metals and non-metals and has metal properties.3. Phase: components with the same composition, structure and performance in the alloy.Solid solution: an atom (compound) of one (or several) element dissolves into the lattice of another element, while a solid metal crystal of the lattice type of the other element remains.5. Solid solution strengthening: as solute atoms enter the gap or junction of solvent lattice, the lattice is di...

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

作者： Daisy

发布时间： 2018 / 09 / 14

点击次数： 105

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： 51

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： 75

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

Method of spring-surface paint

作者： Daisy

发布时间： 2018 / 09 / 12

点击次数： 90

Spring machine regular maintenance and daily maintenance is very important

作者： Daisy

发布时间： 2018 / 09 / 12

点击次数： 65

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： 54

Vibration damping spring is a common elastic component, which is widely used in various vibration equipment and automobile manufacturing industries. It has the advantages of good stability, low noise, good isolation effect and long service life.Compression springs, rubber springs, composite springs, air bag springs are vibration - reducing springs.Vibration damping spring can be divided into: wire compression spring, rubber spring, compound spring, rubber air spring, etc.Steel wire compression spring is a spiral spring under pressure, it USES the material section is mostly circular, also USES the rectangle and the multi-strand steel entangle to coil.Spring is commonly pitch, such as the shape of the compression spring are: cylindrical, conical, convex and concave and a small amount of rubb...

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