Rotating Body Balancing Device with Independent Mass Control

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Solution Overview

Problem

Existing balancing devices for grinding wheels are inefficient due to a lengthy balancing process, inability to perform dynamic balancing, and require machine interruptions for balancing, leading to increased cycle times and suboptimal quality.

Innovation Solution

A balancing device with an unbalance detector, balancing heads with motors and position sensors that can independently handle balancing masses along a circumference to precisely cancel unbalances, allowing for both static and dynamic balancing during processing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the balancing process uses traditional trial-and-error mass movement, then the balancing can be achieved, but the process becomes particularly long and slow

Engineering Contradiction:

Improvebalancing accuracyVSAvoidbalancing process time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent implements a feedback control system where unbalance detection continuously monitors the grinding wheel's unbalance state, and the control unit adjusts the balancing masses' positions based on this feedback. This closed-loop approach eliminates trial-and-error by directly computing the required mass positions from detected unbalance parameters, significantly reducing balancing time while maintaining high accuracy.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent replaces the traditional mechanical trial-and-error adjustment system with an automated control system that uses sensors to detect unbalance and motors to precisely position balancing masses. This substitution of mechanical adjustment with automated control based on detection and computation dramatically accelerates the balancing process.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Productivity

If the grinding wheel is balanced continuously during processing, then productivity increases, but the device complexity increases

Engineering Contradiction:

Improvemachine cycle timeVSAvoidbalancing device structure

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent designs a balancing device that performs both static balancing (correcting unbalance in the radial direction) and dynamic balancing (correcting unbalance in the axial direction) using a unified structure. The balancing masses can be positioned in two dimensions (radial and axial), allowing the same device to handle multiple types of unbalance corrections without requiring separate balancing systems.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent employs dynamically adjustable balancing masses that can be repositioned during the grinding process rather than being fixed. The motors enable real-time adjustment of mass positions based on detected unbalance changes, allowing the system to adapt to wear-induced unbalance variations without interrupting the machining process.

Inventive Principle:

Principle #15Dynamics

3Device complexity

If traditional balancing devices are used, then simple structure is maintained, but dynamic balancing capability is lost

Engineering Contradiction:

Improvebalancing device structureVSAvoiddynamic balancing capability

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The patent extends the balancing capability from one dimension (radial direction for static balancing) to two dimensions by adding axial direction adjustment. The balancing masses can be positioned both radially and axially, enabling the system to correct dynamic unbalances that occur in the axial direction, which traditional single-plane balancing devices cannot address.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Enables quick and precise balancing of grinding wheels, reducing cycle times and ensuring high-quality production with optimal static and dynamic balancing capabilities.

Implementation Method 1

at least one unbalance detector apt to measure the unbalance of the rotating body

Methodology Applied

Scientific EffectVibration detection: Vibration

Implementation Method 2

at least one position sensor apt to detect the position of the balancing masses

Methodology Applied

Scientific EffectPosition detection:

Implementation Method 3

unbalances are detected on two planes during the rotation of the grinding wheel, which generates centrifugal forces creating said unbalance

Methodology Applied

Scientific EffectCentrifugal force: Centrifugal Force

Data Source

PatentUS11103971B2Balancing process and device for a rotating body

Publication Date: 2021.08.31 BALANCE SYST SRL

AI summary

Provided is a balancing device for a rotating body including at least one unbalance detector to measure the unbalance of the rotating body; two balancing masses to be handled along a handling circumference so as to cancel the unbalance; a position sensor to detect the mutual position of the balancing masses; and a motor to independently handle each of the balancing masses as a function of their mutual position and unbalance.