无标题

[keneng2022]

The Basic Knowledge About Compression Springs

There are many kinds of springs in our daily life, including tension spring, torsion spring, compression spring, leaf spring, battery spring, etc. Springs are mechanical parts that use elastic and structural characteristics to produce deformation when working. Transforming deformation energy into mechanical energy, compression spring is the most used one among all springs.

1、 Concept of compression spring

Compression spring is a kind of commonly used spring, which is also called "pressure spring" and belongs to spiral spring. The cross section of the materials used is mostly circular, which is also rolled from rectangular and multi-strand steel. The spring is generally of the equal pitch. The shape of the compression spring is cylindrical, conical, convex-concave and a small amount of non-circular. There is a certain gap between the rings of the compression spring, and the spring shrinks and deforms under the action of an external force to store deformation energy.

It is different from the extension spring in that it has a hook or a pull ring at both ends. For example, the rings at both ends are compression springs and the pull ring is extension springs, which is the difference between the two.

The compression spring is provided with the pressure to resist the spring by external pressure. When the spring load is compressed, the spring will become shorter, then resist the load, and finally return to the original length. It is a mechanical component that can effectively store energy. Compression springs are divided into cylindrical, conical, concave, convex, and rectangular compression springs in shape. A cylindrical compression spring is the most widely used spring, but other springs with different shapes are also used in different fields. Common compression spring materials include carbon spring wire, harp spring wire, and stainless steel spring wire.

1. Carbon spring steel wire: high-quality carbon steel wire, cold drawn and hardened, and lead wire is isothermal quenched. It has the characteristics of low plasticity, strong elasticity, and strong strain resistance. It is widely used in mattresses, automobile cushions, machinery manufacturing, stationery, electric tools, electrical equipment, and other industries.

2. Harp spring wire: It is made of a piano steel wire plate. After being quenched by lead at room temperature, it has a very high elastic limit and strength limit. It is widely used as a material for small springs. The safety valve is used for this compression spring;

3. Stainless steel spring wire: after quenching and tempering, stainless steel spring wire can be used as a spring with high-temperature resistance, corrosion resistance, and non-magnetic strength in the working environment specified in the fields of chemical machinery and electronic instruments.

2、 Characteristics of compression spring

The compression spring provides resistance to external load pressure. Compression springs are usually wire wound at equal intervals and have a fixed wire diameter. Compression springs use multiple open coils to resist the pressure of external loads, such as gravity on the wheel, or your body against the mattress. In other words, they resist external pressure. Compression springs are usually wire wound at equal intervals and have a fixed wire diameter. In addition, there are conical compression springs or combinations of conical and linear springs. Depending on the field of application, compression springs can be used to resist pressure and store energy. The round line is a compression spring commonly used by Z, but there are also compression springs made of square, rectangular, and special shaped lines.

3、 Application of compression spring

The wire spring used for compression spring is used in all fields from household appliances to motor equipment, motors, etc. because it is the required spring type. Compression springs are designed as compression lines to attempt to restore the springs to their original shape by acting on them or the compressed load at their ends, thereby pushing the load back. Main application directions: medical respiratory equipment, medical mobile equipment, hand tools, home care equipment, shock absorption, and engine valve spring.

The application range of compression springs is very wide, mainly in industries such as automobiles, lasers, medical equipment, etc. Different industries and fields require different materials, sizes, and processing technologies for compression springs, and you should be very careful when selecting compression springs. Therefore, it is helpful to have a deep understanding of the relevant knowledge of compression springs to help you choose!

KENENG specializes in designing and producing custom and stock compression springs in a variety of sizes and configurations. We are a compression spring manufacturer. In addition to manufacturing and selling standard stock compression springs, KENENG can also customize compression springs. Customized content includes material, size and style, variable spacing, and so on. With our superior production capacity, we can ensure a wide range of lengths, materials, end and pitch configurations, application finishes, and optional certifications. We also have many standard sizes available. Welcome domestic and foreign customers to negotiate business with Keneng.

[keneng2022]

What Basic Knowledge Do You Need To Know About Fasteners?

The fastener is a kind of mechanical part used for fastening connections and is widely used. Various fasteners can be seen on various machinery, equipment, vehicles, ships, railways, bridges, buildings, structures, tools, instruments, meters, and supplies. It is characterized by a wide range of varieties and specifications, different performances and uses, and a high degree of standardization, serialization, and generalization. Therefore, some people also call a type of fastener with national standards standard fasteners or simply standard fasteners. Fasteners are the most widely used mechanical basic components.

Standardized fasteners are mechanical parts for connection. Standard fasteners mainly include bolts, studs, screws, set screws, nuts, washers, rivets, etc. There are many structural types of bolts, most of which have hexagonal heads. For bolts subject to impact, vibration, or variable load, to increase flexibility, their polished rod parts are made into thin sections or hollow. The base end of the stud is screwed into the threaded hole of the connected part, and the nut used at the nut end is similar to the bolt nut. The structure of the screw is the same as that of the bolt, but the head shape is diverse to adapt to different assembly spaces, tightening degrees, and connection appearance. Set screws have different head and end shapes to adapt to different tightening degrees. There are also many types of nuts, with hexagons being the most widely used.

With China's accession to the WTO in 2001, it has entered the ranks of international trade powers. A large number of Chinese fastener products are exported to countries all over the world, and fastener products from countries all over the world are also pouring into the Chinese market. Due to the specification, size, tolerance, weight, performance, surface condition, and marking method of each specific fastener product, as well as the specific requirements for acceptance inspection, marking, packaging, and other items.

The most important link between fastener development and design is quality control. There are several gates from feeding to finished product delivery, and these gates have different inspection methods. First of all, the incoming materials are related to the appearance, size, elements, performance, detection of harmful substances, etc; In terms of process, more attention is paid to appearance, size, knock test, and forging streamlining; Heat treatment is more about appearance, hardness, torque, tension, metallography, etc; Surface treatment is more about hydrogen embrittlement test, coating, salt spray, etc., including a hazardous substance test for shipment. In terms of size and appearance inspection, the common ones are the two-dimensional element, contour measuring instrument, coordinate measuring instrument, and image sorter (this is a full sorter); In terms of mechanical and chemical testing, there are mainly hardness machines (Rockwell and Vickers), tensile machines and metallographic microscopes; For material detection, there is a spectrum analyzer and a salt spray tester.

Fasteners include bolts, studs, screws, nuts, washers, and pins. Locking or seizure often occurs on fasteners made of stainless steel, aluminum alloy, and titanium alloy materials. These metal alloys have anti-corrosion properties and will produce a thin oxide layer on the metal surface to prevent further corrosion when the surface is damaged. When the stainless steel fastener is locked, the pressure and heat generated between the tooth lines will destroy this oxide layer, causing blocking or shearing between the metal threads, thus causing adhesion. When this phenomenon continues to occur, the stainless steel fastener will be completely locked and can no longer be removed or locked.

Usually, this series of blocking, shearing, sticking, and locking actions occur in just a few seconds, so correct understanding and use of such fasteners can prevent this phenomenon.

1. Select products correctly

a. Before use, confirm whether the mechanical properties of the product can meet the use requirements, such as the tensile strength of the screw and the guaranteed load of the nut. The length of the screw shall be appropriate, and it shall be subject to 1-2 tooth pitches of the nut exposed after tightening.

b. Before use, check whether the threads are rough and whether there are iron filings or dirt between the threads, which often lead to locking.

c. The fasteners can be lubricated before use. It is recommended to use grease, molybdenum disulfide, mica, graphite, or talcum powder for lubrication. Generally, wax dipping is used for lubrication and anti-locking.

2. Pay attention to the use of method

a. The speed and force of screwing in shall be appropriate, not too fast or too large. The torque wrench or socket wrench shall be selected as far as possible, and the adjustable wrench or electric wrench shall be avoided. If the speed is too fast, the temperature will rise rapidly, resulting in locking.

b. In the direction of force application, the nut must be screwed perpendicular to the axis of the screw.

c. The use of washers can effectively prevent the problem of overlocking.

Stainless steel standard fasteners have their requirements for production materials. Most stainless steel materials can be made into steel wire or bar for fastener production, including austenitic stainless steel, ferritic stainless steel, martensitic stainless steel, and precipitation hardening stainless steel. What are the principles in selecting materials? The selection of stainless steel materials is mainly considered from the following aspects:

1. Requirements on mechanical properties of fastener materials, especially strength;

2. Requirements of working conditions on corrosion resistance of materials;

3. Requirements of working temperature on heat resistance (high-temperature strength, oxidation resistance) of materials;

4. Requirements for material processing performance in terms of the production process;

5. Other aspects, such as weight, price, and purchase, should be considered.

Standards for fastener product dimensions: Specify the basic product dimensions; The products with the thread also include the basic size of the thread, thread ending, shoulder distance, undercut and chamfer, and the end size of external thread parts. 2. Standards on technical conditions of fasteners. It mainly includes product tolerance, mechanical properties, surface defects, surface treatment, product test standards, and relevant specific provisions. 3. Standards for acceptance inspection, marking, and packaging of screw products: specify the qualified quality level and sampling plan of spot check items during factory acceptance, as well as the content of product marking methods and packaging requirements. 4. Marking method standards for standard parts, fasteners, screws, and screws: specify the complete marking method and simplified marking method of products. 5. Standards for fasteners in other aspects: such as standards for fastener terminology, standards for fastener product weight, etc.

At present, there are many fastener manufacturers in the market, but we should try to choose a company with security when purchasing fasteners. KENENG is a fastener manufacturer with more than 10 years of manufacturing experience. As one of the fastener suppliers, we have advanced multi station fastener upsetting equipment and various special-shaped fastener cutting machines. The annual sales volume of various fasteners reaches 100000 tons. We are also a supplier of industrial fasteners. Our company can customize non-standard fasteners of various shapes according to customer drawings or samples. Especially good at special fasteners, special fasteners, non-standard fasteners, such as super long screws, shoulder screws, custom nuts, etc. Our processing includes cold forming, hot forging, CNC, etc.

If you have any needs, please contact KENENG, and we will provide you with the best service.