Bangalore Spring Industries

Shankarapuram, Bangalore, Karnataka

Die springs are mainly used in die machinery. However, they are also well-suited for many applications where high-static or shock-load stresses are required or when maximum cycle-life is important. Rectangular wire is used to reduce the solid height and increase the space efficiency of the design.

Introduction to springs

A spring is electric members which store energy and provides a force over a distance by elastic compression. Spring have ability to withstand relatively large compression elastically. Today springs find tremendous applications in engineering and other areas, which makes wide variety of springs both in size and shapes. Springs are mainly used for following functions.

• To cushion, absorb or control the energy either due to shocks, vibration as in railway wagons, automobiles, shock absorbs, press tools etc.
• To exert force as in spring loaded safety value, clutches etc.
• To support moving masses or to isolate vibrations.
• To store energy as in clocks, toys, machines etc.

Springs are classified as:

• Compression springs
• Tension springs
• Spiral Springs
• Disc Springs
• Spring Rings and Bars

In this catalogue we are mainly provided details of compression springs used for following applications

• Press toll dies for sheet metal working
• Moulds for plastic injection modeling.
• Jigs, Fixtures and machines tool.

The springs which are commonly us in such applications mention above are made of rectangular Wire. This spring are known as Die Springs. The advantage of Die Springs over round wire spring is it can give higher compression as compare to the round wire spring & also generate higher force at same compression resulting into higher life of spring in operation. It is always recommended to use spring at its long life compression & shall never be used above average life compression.

This catalogue covers Die Springs as per ISO1024 & JIS12B Standard. The color of the spring identifies its Compression & Load Characteristics. The spring covered in the catalogue are Stock items.

Die Spring CATALOGUES as per ISO and JIS Standards : Click below

• ISO1024 (Click Here)
• JIS12B (Click Here)

Guide line - spring selection and operating condition

• Select the spring carefully at the design stage.
• For long stroke - select light load or medium load spring.
• For more load - select heavy load or extra heavy load springs.
• Calculate spring stroke (required compression)
• Pre loading compression should be equal to 5% of the length.
• Use guide pin, a locating board as a guide - this is essential for springs having a free length / diameter ration exceeding 3.5.
• If possible use longer springs for lower loads.
• Never compress springs beyond the average life load and compression.
• Always check spring holder heights and working strokes of moving elements after die tools has been reground.
• Protect springs from corrosive agents.
• Do not exceed a working temperature of 2500 C. No significant load reduction occurs up to 1200 C, beyond this temperature an average loss of 1% for every 400 C must be calculated.
• Do not one spring at a time, if they are multiple in use.
• Do not alter physical characteristics of springs like cutting of coils, grinding of internal or external diameter.

Disc spring, Disc springs are conical shaped washers, designed to be loaded in the axial direction F only. They can be statically loaded, either continuously, intermittently or cyclically deflected i.e. dynamically loaded. Infinitely variable spring characteristics can be achieved by the arrangement of disc springs into stacked columns.

Our well-qualified and experienced professionals constantly meet the exciting challenges in the industry and providing solutions to all requirements of the customer.

double torsion springs, when a force is specified at a distance from a centerline or the torque, the distance multiplies and is called momentum, which is equal to the force. Force can be in pounds or ounces with the distance in inches or the force can be in meters with the distance in millimeters. Formulae for torque are based on the tangent to the arc of rotation with a rod to support the spring. The stress in bending caused by the moment is identical in magnitude to the torque, provided that a rod is used.s

Torsion Springs

Helical springs used to apply torque or store rotational energy are commonly referred to as torsion or double torsion. Torque by definition is a force that produces rotation. A torsion spring exerts a force (torque) in a circular arc and the arms rotate about the central axis. The stress is in bending and not in torsion. It is customary to specify torque with deflection or with the arms at a definite position. Formulas for torque are in pound-inches or inches-pounds. If ounce-inches are specified the value should be divided by 16 to use the formulas in the inch-pound system

Disc springs are conical shaped washers, designed to be loaded in the axial direction F only. They can be statically loaded, either continuously, intermittently or cyclically deflected i.e. dynamically loaded. Infinitely variable spring characteristics can be achieved by the arrangement of disc springs into stacked columns. A disc spring (also called as "Belleville washer" after the inventor) consists primarily of a convex disc supported at the outer periphery by one force and an opposing force on the center of the disc. Disc springs are used singly, or in stacks, to achieve a desired load and travel. The advantage of a disc spring is that it generates high force in a very short spring length and with minimal movement when compressed. All disc springs are subject to exact manufacturing and quality control standards. All discs are preset so that they do not significantly relax under load. Disc springs achieve economy in design and reduce the cost of overall assemblies by the maximum utilisation of space. Developments such as the internal combustion of engine, turbine and jet systems, cnc machineries, nuclear power, oil and gas exploration, etc. have progressively advanced this simple spring device to the sophisticated energy storage system that it is today.