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HOT INFORMATION / More

2018 - 04 - 18

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

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...

Wire forming spring

2018 - 08 - 25

Wire forming spring is a mechanical part that uses elasticity to work. It is usually made of spring steel. It is used to control the movement of machine parts, to mitigate impact or vibration, to store energy and to measure the magnitude of force. It is widely used in machines and instruments.The spring is just an accumulator. It has the function of storing energy, but it can not release the energy slowly. To realize the function of releasing slowly, it should be realized by "Spring + large transmission ratio mechanism", which is common in the mechanical meter.Spring is a kind of ela...

How to prevent cracks at the ends of spring grinding

2018 - 09 - 10

Spring grinding is easy to produce cracks at the end of the tightness, and directly affect the verticality of the spring, load and free length size, so the general grinding process of spring should be carried out after stress relief tempering. Eliminate the residual stress of steel wire cold drawing to prevent the generation of end gap cracks.The main factors that affect the quality of springs in grinding are as follows:(1) The grinding wheel should be selected reasonably; (2) the control of the bevel angle of the end ring; (3) a certain number of special measuring tools should be equipped to ...

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

2018 - 09 - 20

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...

How to clean stainless steel spring

2018 - 09 - 30

Washing method according to the surface state:General notice when washing, please pay attention not to scratch the surface to avoid the use of bleaching ingredients and abrasive solution, steel wire ball (brush roller ball), grinding tools, etc. In order to remove the washing liquid, wash the surface with clean water at the end of washing.Surface condition and washing methodDirt and scale removal - wash with soap, mild detergent or warm water.Label and film -- scrubbing with warm water and weak detergent;Binder ingredients - use alcohol or organic solutions;Contamination of fats, oils, lubrica...

The chemical protective layer of the spring

2018 - 10 - 17

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 ...

Torsion spring

2018 - 10 - 29

The torsion spring is divided into single torsion spring and double torsion spring. The spring is usually inserted into the pin or shaft. When external force is applied, a torsion force is generated according to the shaft center of the spring to make the spring coiled tightly or loose.Double - twist spring is divided into external double - twist and internal double - torque spring.The loops are either closely encircled or separately encircled to allow for a load of torque (at right angles to the spring axis).The end of the spring can be wound into a hook or straight twist arm.The following is ...

NEW INFORMATION / More

Manufacturing of Springs

2018 - 04 - 18

Material and characteristics of spring

2018 - 08 - 08

The spring is often subjected to variable load or impact load. In order to ensure that the spring can work permanently and reliably, the material must have high elastic limit and fatigue limit. At the same time, it should have enough toughness and plasticity and good heat treatment.Spring materials and properties can be consulted in relevant manuals, specifications and standards (GB/T129.6-92, GB4357-89). The common spring steel is mainly:1: carbon spring steelThis kind of spring (such as 65, 70 steel, etc.) has the advantages of cheap price, convenient source of raw materials, low elastic lim...

Inspection content and specification for spring parts(part 7)

2018 - 08 - 20

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 reliabi...

Which industry is the main application of spring?

2018 - 09 - 05

1, matching springs and springs based on automobiles, motorcycles, diesel engines and gasoline engines. This type of spring has valve spring, suspension spring, damping spring and clutch spring, etc., with a large amount, which accounts for about 50% of the spring production. At the same time, the technical level is also high, it can be said that the technical level of these springs is representative, they are mainly to the high fatigue life and high anti relaxation direction, thus reducing the quality. 2. Large springs and plate springs, which mainly include railway rolling stock, heavy ...

How to choose spring wire

2018 - 09 - 18

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, re...

Automatic spring winding process

2018 - 09 - 28

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 ...

Measures to improve spring mass

2018 - 10 - 15

(1) deformation heat treatment -- the combination of deformation reinforcement and heat treatment enhancement to further improve the strength and toughness of steel.Heat treatment of deformation has high, medium and low temperature.The high temperature deformation heat treatment is to produce the deformation immediately after the austenitic state at a stable distance, or can be combined with forging or hot rolling, that is, quenching immediately after hot forming.The deformation heat treatment has been applied to automobile plate spring production.(60 si2mn)(2) isothermal quenching of spring -...

Production of spring

2018 - 10 - 25

The technological process of helical springs refers to the process of converting spring materials into finished springs, which flow through every process in sequence. Because of the spring material, the spring type and the processing method are different, the technological procedures of the spiral spring are also different. However, their basic technological processes are coil spring heat treatment end processing surface treatment.Next, introduce several typical processes.1. manufacturing compressed spiral spring with cold drawn spring steel wireFor the lathe coil spring, after the winding spr...

Helical Spring

2019 - 12 - 16

Helical springsMaterials necessary for every aspect of daily life. Helical spring is a spring that is subjected to torsional deformation, and its working part is also tightly wound into a helical shape. Its characteristic line is linear, can make compression spring, stretch spring and torsion spring. When the load is large and the radial size is limited, two compression springs with different diameters can be used together to become a combination spring. The total winding number n1 is the sum of the effective winding number n and the supporting winding number n2. Volute coil helical...

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Inspection content and specification for spring parts(part 1)

日期： 2018-08-15

浏览次数: 38

nelson

1, Test classification

A) First inspection;

B) Quality consistency check.

2, A spring group of groups

The spring shall be inspected according to the batch. Each batch shall consist of the same material specifications, grades, melting furnace numbers and springs made under the same technological conditions.

3, First test

3.1 The inspection of the production of the spring first piece must be carried out according to the test or inspection items specified in the drawings, and the determination of qualified and unqualified shall be made.

Inspection content and specification for spring parts(part 1)

3.2 The first piece of spring must be checked and recorded in full. The inspector will inform the technician of the inspection result.

4, Quality conformance test

The scope of application of the 4.1 whole test:

4.1.1 Small batches of springs, such as less than 50 pieces;

4.1.2 Special important missiles, which will endanger personal safety and serious economic losses after damage, such as nuclear power plants, aeroengines, seismographs and other springs.

4.1.3 Can automatically detect items, such as spring load, free height, etc.

4.2 The scope of application of sampling inspection:

4.2.1 Large spring, more than 500 pieces;

4.2.2 High cost, long cycle inspection items, such as fatigue test, creep and relaxation test, etc.

4.2.3 Destructive testing items, such as impact test, metallographic structure, decarburization and hardness test.

4.2.4 Has a certain degree of unqualified inspection items, such as end clearance and verticality, which will not cause much impact.

4.2.5 Large quantities of items that cannot be automated inspection, such as the surface quality of springs. There are a wide variety of springs, and their inspection items and requirements can be determined according to the technical standards and specifications of each spring. This paper mainly introduces the inspection and requirements of the cylindrical helical spring products for the reference of other springs.

5. Inspection of the quality of spring appearance

The appearance quality of the spring is visually inspected after oil immersion sandblasting or five times magnifying glass. Ultrasonic testing or magnetic particle testing can also be used for special requirements. The spring appearance quality requirements: the spring ring is not allowed to have obvious distortion and bending. The spring should clear the surface of the surface, salt, lead and oxide. The surface of the spring is not allowed to have cracks, crack, scars, corrosion and so on, but it is allowed to be removed by grinding in the range of material cross section, and the grinding part should be leveled. Slip; the individual scratches, scratches, or dents on the spring surface are not allowed to be greater than half of the diameter tolerance of the material.

last：nspection content and specification for Next：The development course of spring materia

Relevant recommendations

Constant Force Spring

2020 . 01 . 13

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Compression Springs

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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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springs are a mechanical part that use elasticity to work. Generally made of spring steel. It is widely used in machines and instruments to control the movement of machine parts, mitigate impact or vibration, store and store energy, measure force, etc.The spring is just an accumulator, it has the function of storing energy, but can not release the energy slowly, to achieve the release of this function should rely on the 'spring + large transmission ratio mechanism' to achieve, common in the mechanical table.The spring is widely used in the mechanical and electronic industry. The spring can produce a large elastic deformation under load and convert mechanical work or kinetic energy into deformation energy. After unloading, the spring's deformation disappears and returns to its o...