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Pure Axial Rotation Roller Assembly with Linear Support

IP.com Disclosure Number: IPCOM000033866D
Publication Date: 2004-Dec-30
Document File: 3 page(s) / 163K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method for a low-friction, fully supported roller assembly for straight line contacts. Benefits include simplifying the assembly process and reducing manufacturing costs.

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Pure Axial Rotation Roller Assembly with Linear Support

Disclosed is a method for a low-friction, fully supported roller assembly for straight line contacts. Benefits include simplifying the assembly process and reducing manufacturing costs.

Background

The roller assembly is used in cyclic bend tests for component reliability. It is mounted on a universal fixture that can do cyclic bend tests for component reliability evaluation and technology certification. This fixture is designed to increase reliability test throughput, reduce cycle time, and improve accuracy by providing uniform stress conditions across all the units under test. The roller assembly enables a free moving, low friction, line of contact that provides the uniformed stress conditions needed for testing.

General Description

The disclosed method’s assembly establishes eight total lines of contact on a circuit board for a four-point bend test. Although only four roller assemblies are used, each roller assembly creates a line of contact on both sides (see Figure 1) of the circuit board. The board returns to the original

free state

after each bend cycle, thus the reason for a line of contact on both sides of the board. The roller only has one side that is a free moving, low friction, line of contact (see Figure 2). This side must be used in the direction of the force side. Figure 3 shows the machined parts of the roller assembly.

Advantages

The following are advantages of the disclosed method:

·        A low friction...