Ball Guide Groove Ramps for Uniform Multi-Groove Lapping

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Solution Overview

Problem

Existing ball machining apparatuses face inefficiencies in achieving uniform abrasion and high geometrical accuracy due to manual transfer or laborious sorting of balls between ball grooves of varying diameters, leading to increased time consumption and rejection rates.

Innovation Solution

A ball guiding device that enables balls to move through multiple concentric ball grooves in a predetermined sequence using guide grooves with ramps and return sections, allowing for seamless transfer without manual intervention, supported by bearing elements for adaptability and reduced friction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If multiple concentric ball grooves are used to machine multiple balls simultaneously, then productivity increases, but the uniformity of abrasion deteriorates because balls in different diameter grooves experience different material removal rates

Engineering Contradiction:
Improvenumber of balls machined simultaneouslyVSAvoiduniformity of abrasion
Core Design Contradiction:
ProductivityVSManufacturing precision

Solution Approach 1:

The patent applies preliminary action by transferring balls between grooves at predetermined intervals during the machining process. This ensures that each ball spends equalized time in each groove, achieving uniform abrasion before the machining cycle completes. The transfer mechanism proactively manages ball distribution to prevent non-uniform wear from developing.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent implements dynamics by making the ball groove configuration changeable during operation. Balls are dynamically transferred between grooves of different diameters according to a predetermined sequence, allowing the system to adapt the machining conditions for each ball to achieve uniform abrasion while maintaining high productivity through parallel processing.

Inventive Principle:
Principle #15Dynamics

2Manufacturing precision

If manual transfer of balls between ball grooves is performed to achieve uniform abrasion, then manufacturing precision improves, but time consumption increases significantly

Engineering Contradiction:
Improvegeometrical accuracy of ballsVSAvoidtime for manual transfer and sorting
Core Design Contradiction:
Manufacturing precisionVSLoss of time

Solution Approach 1:

The patent applies self-service by implementing an automated transfer mechanism that moves balls between grooves without manual intervention. The system uses gravity-fed chutes and guide structures to automatically guide balls from one groove to another, eliminating the need for operator involvement in the transfer process while maintaining precise control over ball sequencing.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The patent uses intermediary structures such as guide grooves, chutes, and transfer zones that facilitate automatic ball movement between machining grooves. These intermediary elements mediate the transfer process, enabling seamless transition of balls between different groove diameters without requiring direct manual handling or complex sorting operations.

Inventive Principle:
Principle #24Intermediary (Mediator)

3Manufacturing precision

If balls are sorted according to size and shape after machining to ensure quality, then manufacturing precision is maintained, but productivity decreases and rejection rate increases

Engineering Contradiction:
Improvegeometrical and dimensional accuracyVSAvoidproduction output
Core Design Contradiction:
Manufacturing precisionVSProductivity

Solution Approach 1:

The patent applies preliminary action by maintaining the ball sequence and achieving uniform abrasion during the machining process itself through automated transfers between grooves. This preliminary equalization of wear prevents the need for post-machining sorting and rejection, as all balls emerge with consistent geometrical properties from the outset.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent implements continuity of useful action by integrating the ball transfer and sequence maintenance functions into the continuous machining process. Balls flow continuously through the system with automatic transfers occurring during machining cycles, eliminating discontinuous sorting operations and ensuring that all balls undergo equivalent machining treatment without interruption to production flow.

Inventive Principle:
Principle #20Continuity of useful action

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

Ensures uniform abrasion and high geometrical accuracy of machined balls by maintaining a consistent sequence through the grooves, reducing the risk of damage and improving production efficiency.

Implementation Method 1

the first ramp can have a positive slope, and the second ramp can have a negative slope or gradient

Methodology Applied
Scientific EffectGravity: Gravitation

Implementation Method 2

the first ramp can have a positive slope, and the second ramp can have a negative slope or gradient

Methodology Applied
Scientific EffectGravity: Gravitation

Implementation Method 3

supported by bearing elements for adaptability and reduced friction

Methodology Applied
Scientific EffectFriction: Friction

Data Source

PatentUS20250387865A1Ball guiding device for an apparatus for lapping and/or grinding balls
Publication Date: 2025.12.25 AB SKF SKF PATENT DEPARTMENT
  • US20250387865A1 patent drawing
  • US20250387865A1 patent drawing
  • US20250387865A1 patent drawing

AI summary

A ball guiding device configured for use with an apparatus for lapping and/or grinding balls that includes a first disc and a second disc with first and second continuous grooves separated by a wall. The ball guiding device includes a body having a guide groove with a first end insertable into the first continuous groove and a second end insertable into the second continuous groove and a raised central portion configured to overly the first wall. The guide groove including a first ramp extending from the first end to the raised central configured to guide the balls out of the first continuous groove and a second ramp extending from the raised central portion to the second end configured to guide the balls into the second continuous groove.