Product Description

TEMB has been specialized in spring for 20 years. With 15 computer coiling machines, 13 heat-treatment furnaces, 16 spring grinding machines, 6 chamfering machines, 8 setting machines, 5 shot-blasting machines, 1 full automatic load sorting machine, 8 fatigue machines, 6 tension and compression testing machines, TEMB can produce all kinds of springs with diameter 0.2~12.0mm, annual capacity 80 million pcs.
We have established long and friendly cooperation relationship with high level steel manufacturers at home and abroad, ensuring the reliable raw material quality, such as SUMITOMO and Suzuki Garphyttan from Japan, KISWIRE from Korea, and SINOSTEEL from China.

The arc spring (also known as – bow spring, curved spring, circular spring or “banana” spring) is a special form of coil spring which was originally developed for use in the dual-mass flywheel of internal combustion engine drive trains. The term “arc spring” is used to describe pre-curved or arc-shaped helical compression springs. They have an arc-shaped coil axis.
Function
Like other technical springs, arc springs are based on the fundamental principle of storing mechanical work in the form of potential energy and the ability to release this energy again. The force is applied through the ends of the spring. A torque can be transmitted around an axis via the force  directed along this helical axis and the lever arm to the system center point. The wire of the arc spring is mainly subjected to torsional stress.
Support 
Arc spring with sliding shell.
Representation of the friction hysteresis of a single-stage arc spring supported by a sliding shell in a torque-angle characteristic curve.
An arc spring requires suitable support to transmit torque. The support is usually provided from the outside in the form of an arcuate channel (sliding shell) or radially shaped support plates. This prevents buckling of the arc spring. Another result of this support is a hysteresis between the loading and unloading curves in the characteristic curve. This results from the friction of the spring on the radial support and is an intended effect to achieve damping in the system.
Arc spring systems
As with compression springs, spring systems can also be used for arc springs. The main designs are series and parallel connection. With these, single-stage or multi-stage spring characteristics can be achieved. In order to make optimum use of the available space, systems consisting of inner and outer arc springs are often used.
Representation of the friction hysteresis of a two-stage arc spring supported by a sliding shell in a torque-angle characteristic curve.
In addition, the spring characteristic can be influenced by other parameters such as the cross-sectional geometry of the wire, the coil diameter or the number of coils.
Applications
Schematic representation of bow springs in a dual mass flywheel.
The arc spring is suitable for static and quasi-static as well as dynamic applications. Examples include:
Dynamic applications:
Dual mass flywheel
Torque converter
Arc spring clutch
Belt tensioners, pulley decouplers

FAQ

Q: Which kind of materials are available? 
A: TEMB Spring is CZPT to manufacture different spring types of compression springs, extension springs, torsion springs, wire forms with a large range of High-Grade Spring Steel – Carbon steel – Stainless steel – Music Wire.
The wire diameter is available from 0.2~12.0mm, which can meet the requirement of different applications.

Q: Do you support orders in small quantity or do you only accept large runs?
A: TEMB Spring manufactures large quantity springs, small quantity springs based on your demand.  We will work with you to choose the most effective solution.

Q: Does TEMB spring offer DESIGN service OR initial ASSISTANCE ON SPRINGS?
A: Our engineers could give initial assistance on the design and advise to lower the production cost. Our engineer has years of experience in spring design. We could provide drawing format in CAD, 3D, and 2D design layout as well as prototype development.

Q: What is the typical lead time for custom springs?
A: The lead time varies in custom springs. For compression springs, extension springs, torsion springs, wire forms in our mold range, we are CZPT to deliver within 25 days. However, for some complex shapes of springs, the delivery time would be around 30~40 days.

Q: Do you charge custom spring samples?
A: We make the custom springs sample charge as a subscription of formal order. In other words, the sample charge could be refunded when we receive the order. However, if your sample requires an additional mold, we will charge it.

Q: If we order large quantity springs, will you house the springs, wire forms, and ship to us based on a required basis?
A: Our warehouse provides specific stock service for long term business. You can make your shipment schedule on an annual, monthly basis. We will ship on a specific schedule.

Types of V-Belts and Their Properties

A v-belt’s inside length and pitch are determined by measuring along the bottom side. The included angle of a v-belt is measured from its flanks when it is extended. Most v-belt sections are 40 degrees. There are different types of v-belts, and the dimensions of each are standardized by different organizations. This article will introduce the different types of v-belts and their properties.

Notched v-belts reduce bending stress

Notched V-belts reduce bending stress by reducing the axial length of the belt by 2 or more notches. These notches are characterized by different profiles, which differ in the pitch angle and the inside length. ISO and DIN standards are followed by the manufacturers of these belts. Notched v-belts are used on industrial machinery in countries other than the US.
Compared to the standard V-belts, notched ones are designed to resist bending stress better and offer better heat dissipation. They also last longer and run cooler than standard V-belts. Furthermore, they are about 2 percent more energy efficient than their standard counterparts. Therefore, notched V-belts are a viable replacement for standard V-belts.
Notched V-belts are commonly used in industrial applications because of their low price, ease of installation, and availability of many sizes. Another advantage of notched V-belts is that they provide more wedging force and higher load capacity. Notched V-belts have a wider v-groove than flat ones, which makes them more effective for heavy-duty applications.
Notched V-belts also provide better traction. They reduce bending stress, which is beneficial for preventing fatigue and tearing of v-belts. Additionally, v-belts can be installed in an existing equipment to add more performance. And with proper maintenance and installation, notched V-belts will provide trouble-free service for many years to come.

Ribbed v-belts reduce heat dissipation

Various kinds of v-belts are available for varying applications. The more popular types are the fractional horsepower and the double-V. Fractional horsepower v-belts are designed for light-duty applications, such as machine shop equipment and household appliances. The common sectional names are 2L, 3L, 4L, and 5L. The L in each of these belts refers to the top width of the belt, multiplied by 1 eighth inch.
Unlike conventional belts, ribbed v-belts are flexible, making them ideal for use in vibrating loads. They reduce heat dissipation and can be ordered in single or multiple sets to match your application. However, ribbed v-belts should not be mounted on deep-groove sheaves, as this can cause the belt to turn over. If you use deep-groove sheaves, the risk of rupture is very high. Deep-groove sheaves can also cut banded belts. Extremely worn sheaves can also cause the belt to rip.
The 2 types of ribbed v-belts differ in their construction and application. While both types have trapezium cross-sections, they are similar in that they are made of polyurethane or other durable materials. Ribbed v-belts have an additional layer of fabric on the elastomer core for reduced noise and better heat dissipation.
Ribbed v-belts are available in a variety of sizes, including trough v-belts. Their cross-sections are categorized by their top and bottom widths and depths. The included angle of most v-belt sections is approximately 40 degrees. Different types of v-belts have different cross-sections, and these cross-sections are standardized by various organizations.
As the load increases, a ribbed v-belt will wedge into the groove and decrease the amount of friction needed to maintain the correct torque. Flat belts can track off the pulleys due to friction. However, V-belts are more stable and require less width than flat belts. The main advantage of ribbed v-belts is their increased efficiency.
The global-local finite-element model is also used to calculate the maximum and minimum J-integrals during a belt’s running cycle. The data is then used to evaluate the durability of ribbed v-belts in various applications. The numerical models used for the calculations involve a ribbed V-belt with 5 full ribs.

Cogged v-belts increase lateral rigidity to reduce belt whip

Cogged v-belts are designed for maximum performance and durability on even the harshest drive systems. These belts are made from high-modulus polyester cords that resist hardening and stretch and provide superior balance and strength. They also feature raw-edge sidewalls to reduce slip and drive vibration. In addition, they have specially-formulated rubber compounds for oil resistance. CZPT Cog-Belt offers substantial savings in downtime, energy consumption and horsepower.
A double cogged v-belt combines the benefits of cogged and double vee-belts. Its bonded reinforced tie band offers enhanced flexibility and reduces belt whipping in multiple-belt drives. Double cogged v-belt dimensions vary depending on the standards of the manufacturer. Regardless of the type, you’ll want to use a belt that is aligned correctly.
Standard v-belts are also known as wrapped or raw edge v-belts. Wrapped V-belts feature fabric covers above and beneath the cord to increase lateral rigidity and reduce belt whip. Cogged V-belts also have fabric covers to prevent wear on the core and increase the belt’s operating temperature. They’re ideally suited for applications that require high-temperature operation.
Cogged V-belts can significantly decrease energy consumption and improve power transmission capabilities. They also have a bias-cut cover stock that provides axial and lateral stability while preserving the cord integrity. A fiber loaded cogged construction offers optimum flexibility while minimizing heat buildup. It can be installed on any type of drive, including chain conveyors and industrial-grade machines.
The two-layer tie-band permanently bonds multiple belts together. This provides maximum cord support, heavy shock absorption, and stability. The belts are also engineered with patented banding processes that eliminate belt turnover and distribute load evenly across the drive. CZPT Cog-Band Belts minimize belt whip and provide stability. They also minimize belt turnover and rollover in heavy-duty industrial applications.
A classic v-belt is the most common and economical belt. Its nominal dimensions are 1/2″ to 1-11/2″ wide and 16″ to 400 inches long. The width is usually 40 degrees. Different organizations use different cross-sections to classify v-belts. The following table provides a general comparison of the 2 types. The Cogged V-Belt is designed to reduce belt whip by increasing the lateral rigidity of the belt.

Cogged v-belts provide superior environmental resistance

The patented design of the Dayco V-Belt provides maximum power transmission while combining the benefits of a cogged belt and raw-edge construction. The belt’s top cogged design helps increase air flow around it, preventing deterioration and extending its useful life. The belt’s three-ply design features neoprene impregnated fabric for superior durability and a specially-formulated polyester cord for increased strength and stability.
A variety of v-belts are available, with cogged and notched versions presenting unique characteristics. Cogged V-belts are more flexible than uncogged versions and feature ‘X’-shaped grooves for enhanced heat dissipation. Cogged V-belts are interchangeable with conventional v-belts, although their ‘X’ design is most common. Hexagonal v-belts are a popular option for applications where traction is needed.
Another type of Cogged V-belt is designed specifically for outdoor power equipment. This v-belt is brown, with smooth clutching covers. Its aramid cord is very strong and provides superior durability in adverse conditions. Cogged V-belts can withstand severe shock loads and are therefore ideal for outdoor power equipment. Furthermore, they offer superior environmental resistance, minimal stretch, and a long service life.
A Cogged V-belt is composed of tensile cords that are supported by a rubber stock. Different manufacturers use different synthetic rubber stocks for this purpose. These materials help to extend the belt’s operating temperature range and resist premature failure. In addition to tensile cords, the belt’s body is covered with a fabric cover. The fabric is treated to form a chemical bond with the core materials, which allows it to withstand constant bending.