Boring Tool Counterweight and Lubrication Design

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Solution Overview

Problem

Existing boring tools for machining large monolithic parts with precise geometric characteristics face issues of mass imbalance, insufficient lubrication, and risk of separation due to centrifugal forces at high rotation speeds, leading to inefficiencies in hole boring operations.

Innovation Solution

A boring tool design featuring a sole with a slide and pinching mechanism for precise adjustment and locking of tool holders, combined with centralized lubrication and a stroke limiting device to ensure secure attachment and effective lubrication, addressing the imbalance and separation risks.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If high rotation speeds are used to improve productivity, then cutting efficiency increases, but mass imbalance and centrifugal forces increase leading to vibration and tool holder separation

Engineering Contradiction:

Improvecutting efficiencyVSAvoidtool holder stability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent employs counterweights integrated into the tool holder assembly that are positioned to balance the mass distribution during rotation. These counterweights compensate for the imbalance caused by the cutting tool and other asymmetric components, reducing vibration and preventing tool holder separation even at high rotation speeds.

Inventive Principle:

Principle #8Anti-weight (Counterweight)

Solution Approach 2:

The tool holder incorporates pre-adjustable positioning mechanisms and locking features that are configured before operation. The balance adjustment elements are pre-positioned to achieve optimal mass distribution, and the locking mechanism is designed to maintain secure attachment under centrifugal forces without requiring real-time adjustment during high-speed operation.

Inventive Principle:

Principle #10Preliminary action

2Device complexity

If conventional lubricating towers are used at a distance from the cutting zone, then device complexity is reduced, but lubrication effectiveness is lost due to jet deflection at high speeds

Engineering Contradiction:

Improvelubrication system simplicityVSAvoidlubrication effectiveness

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The lubrication system is integrated directly into the tool holder structure, with lubrication channels and nozzles nested within the tool holder body. This allows the lubricant delivery system to be positioned close to the cutting zone without adding external complexity, ensuring effective lubrication even at high rotation speeds where external towers would have their jets deflected.

Inventive Principle:

Principle #7Nested doll (Nesting)

3Ease of operation

If tool holders are mounted on the sole with simple attachment, then ease of operation is improved, but risk of separation due to centrifugal forces increases

Engineering Contradiction:

Improvetool holder mounting simplicityVSAvoidattachment security

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent employs a locking mechanism that replaces simple mechanical attachment with a more robust system capable of withstanding high centrifugal forces. This may involve specialized locking features, clamping mechanisms, or interference-fit designs that provide secure attachment while maintaining ease of operation through standardized interfaces.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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

The solution provides improved resistance to centrifugal forces, secure tool holder attachment, and effective lubrication, ensuring precise and reliable hole boring operations even at high speeds.

Implementation Method 1

by pinching the means 100 of the said tool holder 1 in the slide 4

Methodology Applied

Scientific EffectFriction: Friction

Implementation Method 2

a means 7 for centralized lubrication of the or cutting edges 8 of the tool holder(s) 1 mounted on said sole 2

Methodology Applied

Scientific EffectFluid flow:

Implementation Method 3

a corresponding increase in centrifugal forces exerted on the toolholders

Methodology Applied

Scientific EffectCentrifugal force: Centrifugal Force

Data Source

PatentEP2576108B1Reaming tool on bar

Publication Date: 2016.09.28 SECO E P B

Figure 1
Figure 2
Figure 3~4

AI summary

The invention relates to a boring tool on a flange consisting of at least one tool holder (1) and one flange (2), wherein the tool holder (1) is provided with an interlocking means (101) intended for engaging with the assembly for blocking and guiding the rail (4) that guides and supports the attachment flange (2), which is also provided with a device (10) for limiting the travel of the tool holder (1) or the counterweight (2000), wherein the locating lug of a tool holder (1) or a counterweight (2000) can be withdrawn during the placement of a tool holder (1) or a counterweight (2000) and automatically returns to position after said placement, and wherein each tool holder (1) is provided with a device (11) for lubricating the cutting edge (8) of the tool, connected to the means (7) for the centralised lubrication of the flange. The tool can be used specifically in the field of digitally controlled machine-tool accessories, machining centres and flexible manufacturing cells and systems.