Dual-Stage Machining Head Positioning for Large-Range Accuracy

Solution Overview

Problem

Conventional processing devices face a trade-off between achieving high positioning accuracy and a large positioning range, as increased positioning range complicates maintaining high accuracy.

Innovation Solution

The integration of a second positioning device with higher accuracy within the processing head allows for manual positioning and compensates for the lower accuracy of the first positioning device, ensuring overall high accuracy without requiring a large positioning range for the first device.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If the positioning area of the positioning device is increased to provide a larger machining range, then the positioning range is improved, but the positioning accuracy deteriorates

Engineering Contradiction:

Improvepositioning areaVSAvoidpositioning accuracy

Core Design Contradiction:

Area of stationary objectVSManufacturing precision

Solution Approach 1:

The positioning function is divided into two independent devices: the first positioning device handles coarse positioning over a large area, while the second positioning device handles fine positioning for high accuracy. This segmentation allows each device to be optimized for its specific function without compromise.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent replaces pure mechanical positioning with a hybrid system that includes measurement technology (electronic/optical systems). The measurement system detects position deviations and feeds this information to control the second positioning device, substituting mechanical precision requirements with electronic measurement and control.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Device complexity

If a single positioning device is used to achieve both large positioning range and high accuracy, then the device complexity is reduced, but the positioning accuracy deteriorates

Engineering Contradiction:

Improvepositioning device structureVSAvoidpositioning accuracy

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

The positioning function is divided into two independent devices: the first positioning device handles coarse positioning over a large area, while the second positioning device handles fine positioning for high accuracy. This segmentation allows each device to be optimized for its specific function without compromise.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The second positioning device acts as an intermediary that corrects positioning deviations produced by the first positioning device. This intermediary component enables the system to achieve high accuracy without requiring the entire positioning system to be designed for high precision, thus reducing overall complexity.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Manufacturing precision

If the first positioning device is designed for high accuracy, then the positioning accuracy is improved, but the positioning range is reduced

Engineering Contradiction:

Improvepositioning accuracyVSAvoidpositioning range

Core Design Contradiction:

Manufacturing precisionVSArea of stationary object

Solution Approach 1:

The positioning function is divided into two independent devices: the first positioning device handles coarse positioning over a large area, while the second positioning device handles fine positioning for high accuracy. This segmentation allows each device to be optimized for its specific function without compromise.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent adds a second positioning dimension (the second positioning device) that operates independently to correct deviations. This dimensional addition allows the system to achieve high accuracy without constraining the first positioning device's range, effectively adding a correction layer to the positioning space.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentEP3710198B1Machining device

Publication Date: 2024.10.02 FESTOOL GMBH

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AI summary

The invention relates to a machining device (10; 20) comprising a machining head (4) which has a machining unit (3) designed as a tool and/or order unit, in particular printer unit, and comprising a first positioning device (1) for moving the machining head (4) in order to position the machining unit (3) at a predetermined machining position (33) with a first accuracy. The machining head (4) has a second positioning device (2) and the machining device (10; 20) is designed to position the machining unit (3) at the predetermined machining position (33) with a second accuracy using the second positioning device (2), wherein the second accuracy is higher than the first accuracy meaning that the positioning using the second positioning device (2) compensates for the lower accuracy of the first positioning device (1).