Sliding Processing Unit on Fixed Column for Tall Workpieces

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Solution Overview

Problem

Existing machines for processing workpieces, particularly those made of wood, face issues with high bending forces and improper tool positioning due to the weight of the motor and tool causing the column to bend, leading to non-compliant processing on workpieces with varying heights.

Innovation Solution

The machine design features a stationary supporting column with the processing tool and motor sliding along it, guided by recirculating ball screw guides, to adjust tool positioning based on workpiece height, reducing mechanical stresses and ensuring precise processing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the column is made movable to adjust tool positioning for workpieces of varying heights, then the machine becomes versatile, but the column is subjected to high bending forces due to the weight of the motor and tool

Engineering Contradiction:

Improveability to process workpieces of varying heightsVSAvoidcolumn resistance to bending forces

Core Design Contradiction:

Adaptability or versatilityVSStrength

Solution Approach 1:

Instead of making the column movable to adjust tool height, the invention inverts the approach by making the processing unit movable along the stationary column. This reversal eliminates bending forces on the column while maintaining the ability to adjust tool positioning for workpieces of varying heights

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The processing unit is segmented from the column, allowing it to move independently along the stationary column via recirculating ball screw guides. This segmentation enables height adjustment without compromising column structural integrity

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If the column slides upwards to position the tool above tall workpieces, then the machine can process taller workpieces, but the column bends under the weight of the motor and tool

Engineering Contradiction:

Improveability to process taller workpiecesVSAvoidprocessing compliance

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

Rather than moving the column upwards to reach taller workpieces, the processing unit moves along the stationary column. This inversion prevents column bending and ensures precise, compliant processing even for tall workpieces up to 200mm

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

Recirculating ball screw guides act as intermediaries between the processing unit and the stationary column, enabling smooth vertical movement while maintaining precise positioning and preventing column deformation

Inventive Principle:

Principle #24Intermediary (Mediator)

3Strength

If the processing unit is heavy to ensure robust construction, then the machine is durable, but the column bending increases reducing sliding accuracy

Engineering Contradiction:

Improvemachine robustnessVSAvoidvertical sliding accuracy

Core Design Contradiction:

StrengthVSManufacturing precision

Solution Approach 1:

The invention replaces the mechanical sliding system with recirculating ball screw guides, which reduce friction and improve positioning accuracy. This substitution allows the processing unit to be sufficiently heavy for robustness while maintaining precise vertical sliding along the stationary column

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

This design minimizes bending and vibrational forces, enhancing the machine's robustness and versatility, allowing efficient processing of workpieces up to 200mm in height with improved precision and compliance.

Implementation Method 1

The processing unit is guided by recirculating ball screw guides for sliding vertically along the supporting column

Methodology Applied

Scientific EffectBall screw mechanism: Screw

Data Source

PatentEP4659921A1Machine for processing a workpiece

Publication Date: 2025.12.10 SCM GRP

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Figure 2B

AI summary

Described is a machine (M) for processing a workpiece, in particular a wooden prismatic element, comprising a base (100) comprising a work table forming a work surface (XY) and extending, along a main direction of extension (X), between an infeed section (I) and an outfeed section (U). The machine (M) also comprises at least one processing station (200) configured to perform at least one processing operation on the workpiece and movement means configured to move the workpiece from the infeed section (I) to the outfeed section (U) through the processing station (200). The processing station (200) comprises a supporting column (400) extending, along a vertical direction (Z) perpendicular to the work surface (XY), between a first end (400a) fixed to the base (400) and a second end (400b) distal from the work surface (XY); The processing station (200) also comprises a processing unit slidably coupled to the supporting column (400) for sliding along said vertical direction (Z) towards and away from the work surface (XY). The processing unit comprises a processing tool (500) configured for performing at least one processing operation on the workpiece and a motor (600) configured for actuating the processing tool (500).