Tool Clamp Piston Layout for Interference-Free Tool Rotation

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Solution Overview

Problem

Existing tool clamp devices face issues with rotating tools due to contact between the piston and the clamping mechanism, leading to potential interference and inefficiencies during tool rotation.

Innovation Solution

A tool clamp device with a clamping mechanism featuring a first piston that reciprocates between clamped and unclamped positions, utilizing a second piston to position the first piston between these states, allowing for the separation of the locking part from the clamping mechanism, enabling the rotation of the tool without interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a single piston is used to operate the clamping mechanism part, then the device structure is simple, but the tool cannot be rotated without contact interference between the piston and clamping mechanism part

Engineering Contradiction:
Improvepiston structureVSAvoidtool rotation
Core Design Contradiction:
Device complexityVSEase of operation

Solution Approach 1:

The single piston is divided into two separate pistons: a first piston that operates the clamping mechanism part and a second piston that positions the first piston. This segmentation allows the clamping and positioning functions to be independent, enabling tool rotation without interference between the piston and clamping mechanism part while maintaining structural simplicity.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The second piston acts as an intermediary that positions the first piston between the clamped and unclamped positions. This intermediary mechanism allows the first piston to be positioned independently from the clamping action, resolving the conflict between simple structure and tool rotation capability.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Strength

If the locking part remains in contact with the clamping mechanism part during rotation, then the clamping force is maintained, but contact interference occurs preventing smooth tool rotation

Engineering Contradiction:
Improveclamping forceVSAvoidtool rotation
Core Design Contradiction:
StrengthVSEase of operation

Solution Approach 1:

The system dynamically adjusts the position of the first piston using the second piston. During tool rotation, the first piston can be positioned to maintain clamping force while avoiding contact interference with the locking part, enabling smooth rotation while preserving clamping strength.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The second piston preliminarily positions the first piston between the clamped and unclamped positions before rotation occurs. This preliminary positioning ensures that the locking part is separated from the clamping mechanism part, preventing contact interference during tool rotation while maintaining clamping force.

Inventive Principle:
Principle #10Preliminary 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

The device effectively allows for the rotation of clamped tools without contact issues, enhancing operational efficiency and reliability in machine tools.

Implementation Method 1

a first piston that reciprocates in an axial direction of a predetermined axis about the predetermined axis

Methodology Applied
Scientific EffectHydraulic pressure: Pressure Increase

Implementation Method 2

a second piston that moves the first piston to a third position located between the first position and the second position in the axial direction of the predetermined axis

Methodology Applied
Scientific EffectHydraulic pressure: Pressure Increase

Data Source

PatentUS20240051037A1Tool clamp device and machine tool
Publication Date: 2024.02.15 DMG MORI CO LTD
  • US20240051037A1 patent drawing
  • US20240051037A1 patent drawing
  • US20240051037A1 patent drawing

AI summary

A cutting tool rest (31) includes a clamping mechanism part (131) and a first piston (61). First piston (61) includes a first facing section (63) and a second facing section (64), and clamping mechanism part (131) includes a lever (135). First piston (61) reciprocates between a first position at which lever (135) and first facing section (63) are in contact with each other to operate clamping mechanism part (131) in a clamped state and a second position at which lever (135) and second facing section (64) are in contact with each other to operate clamping mechanism part (131) in an unclamped state. Cutting tool rest (31) includes a second piston (71) that moves first piston (61) to a third position between the first position and the second position. When first piston (61) is located at the third position, lever (135) is separated from first facing section (63) and second facing section (64).