Clamping Device Adjusting Tool Concentricity via Radial Through Bores

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Solution Overview

Problem

Existing clamping devices face challenges in accurately compensating for concentricity inaccuracies, which affect the alignment and precision of tools on machine tools.

Innovation Solution

The clamping device features threaded bores that open into the axially inner end area of the receptacle, allowing for adjustable concentricity through levers, with configurations such as two diametrically opposite bores or four bores arranged at 90° offsets, enabling defined alignment and tilting of the clamped tool.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If threaded bores are formed in the base body to adjust concentricity, then concentricity adjustment capability is improved, but device complexity increases

Engineering Contradiction:
ImproveconcentricityVSAvoiddevice complexity
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The adjustment mechanism is segmented into multiple independent threaded bores (typically 2-4) distributed around the receptacle. Each bore can be adjusted independently to correct specific directional concentricity errors, allowing precise control without requiring a complete redesign of the entire clamping device structure.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The threaded bores are pre-formed in the base body at strategic locations before final assembly. This preliminary preparation enables quick concentricity adjustment by simply inserting and adjusting the threaded rods, rather than requiring complex machining or assembly operations after the device is built.

Inventive Principle:
Principle #10Preliminary action

2Manufacturing precision

If multiple threaded bores are distributed around the receptacle, then alignment precision is improved, but ease of operation deteriorates

Engineering Contradiction:
Improvealignment precisionVSAvoidease of operation
Core Design Contradiction:
Manufacturing precisionVSEase of operation

Solution Approach 1:

Different regions of the base body are equipped with threaded bores at specific locations (e.g., diametrically opposite or at 90° intervals) based on the most common alignment requirements. This localized placement allows operators to address specific alignment issues without having to adjust all possible adjustment points, simplifying the operation while maintaining high precision.

Inventive Principle:
Principle #3Local quality

3Manufacturing precision

If threaded bores open into the axially inner end area of the receptacle, then adjustment effectiveness is improved, but device complexity increases

Engineering Contradiction:
Improveconcentricity adjustment effectivenessVSAvoidstructural complexity
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The threaded bores are positioned to open into the axially inner end area of the receptacle rather than the outer area. This dimensional repositioning allows the adjustment force to be applied more effectively at the point where it has maximum leverage on the clamped component, improving adjustment effectiveness without requiring additional external mechanisms.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

Data Source

PatentEP2314403B1Clamping device
Publication Date: 2015.08.12 SCHUNK GMBH & CO KG
  • EP2314403B1 patent drawingFigure 1~2

AI summary

The present invention relates to a clamping device with a base body (2) and a receptacle (4) provided at an axial end region of the base body (2) for a component to be clamped, wherein several threaded bores (7) are distributed along the circumference of the receptacle (4) in the base body (2), into which adjusting screws (8) for aligning a clamped component (W) are screwed or can be screwed, which is characterized in that the radial threaded bores (7) are designed as through bores which open into the receptacle (4) in such a way that screwed-in adjusting screws (8) come into direct contact with a clamped component (W).