Vice Piece Locker Layout for Self-Centering CNC Positioning

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Solution Overview

Problem

Machine tools require frequent redefinition of the origin of axes when switching between different pieces, leading to inefficiencies and potential errors in processing, especially in CNC machines, where precise and rapid processing is necessary.

Innovation Solution

A fixing system for vices that includes a piece locker with uniquely sized and positioned holes for centring plugs, allowing for self-centring and automatic correct positioning of pieces, eliminating the need for repeated axis origin definition and minimizing mounting errors.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the origin of axes is redefined for each piece in conventional fixing systems, then the piece can be processed, but the processing time increases and error risk increases

Engineering Contradiction:
Improveprocessing speedVSAvoidmounting time
Core Design Contradiction:
ProductivityVSLoss of time

Solution Approach 1:

The piece locker is pre-configured with multiple holes of different diameters and positions before the machining operation begins. The centring plugs are pre-positioned in these holes, establishing a fixed reference origin of axes that remains constant across multiple pieces. This preliminary setup eliminates the need to redefine the origin for each new piece, thereby reducing mounting time and increasing productivity.

Inventive Principle:
Principle #10Preliminary action

2Ease of operation

If conventional fixing systems are used, then pieces can be mounted, but mounting errors occur and positioning precision deteriorates

Engineering Contradiction:
Improvemounting easeVSAvoidpositioning precision
Core Design Contradiction:
Ease of operationVSManufacturing precision

Solution Approach 1:

The piece locker features holes with different diameters at specific positions, creating an asymmetric pattern that allows only one correct orientation for mounting the centring plugs. This asymmetric design makes it impossible to mount the piece incorrectly, as the plugs will only fit in their designated holes. Consequently, positioning precision is guaranteed without requiring complex alignment procedures, making the operation easier and more reliable.

Inventive Principle:
Principle #4Asymmetry

3Manufacturing precision

If multiple holes with different diameters are used for centring plugs, then positioning accuracy improves and error risk reduces, but the device complexity increases

Engineering Contradiction:
Improvepositioning accuracyVSAvoidfixing system complexity
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The fixing system is segmented into distinct functional elements: the piece locker body, multiple holes with specific diameters, and centring plugs. Each hole serves a specific positioning function based on its diameter and location. This segmentation allows for modular design and assembly, where the complexity is distributed across simple, standardized components rather than a single complex mechanism. The result is a system that achieves high positioning accuracy through the coordinated arrangement of simple elements.

Inventive Principle:
Principle #1Segmentation

4Productivity

If the origin of axes is fixed independently of the piece, then productivity improves and mounting time reduces, but the adaptability to different piece geometries must be maintained

Engineering Contradiction:
Improveprocessing efficiencyVSAvoidadaptability to various piece geometries
Core Design Contradiction:
ProductivityVSAdaptability or versatility

Solution Approach 1:

The piece locker is designed as a universal fixture with multiple holes of varying diameters and positions that can accommodate different types of centring plugs corresponding to different piece geometries. The fixed origin of axes serves as a common reference for all pieces, while the selectable holes and plugs provide adaptability. This multi-functional design allows the same piece locker to process various piece types efficiently without sacrificing positioning accuracy or requiring origin redefinition.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentEP3131704B1Fixing system for vices
Publication Date: 2021.05.26 LONGARETTI GUIDO
  • EP3131704B1 patent drawingFigure 1~2
  • EP3131704B1 patent drawingFigure 3~4
  • EP3131704B1 patent drawingFigure 5~6

AI summary

A fixing system for vices (1) comprising: a base (10); said base (10) having a first runner (15, 16); a fixed jaw (11) fixed to an end of said base (10); a mobile jaw (12) sliding along said runner (15, 16); a piece locker (20) to be fixed between said fixed jaw (11) and said mobile jaw (12); said piece locker (20) comprising a plurality of holes (28, 29, 30, 31, 32) to fix a piece to be processed onto it; characterised by said plurality of holes (28, 29, 30, 31, 32) being arranged in a substantially random manner; said plurality of holes (28, 29, 31, 32) comprising at least two holes (28, 29) having a first diameter and at least two holes (31, 32) having a second diameter different to said first diameter.