Spindle arrangement of a machine tool

EP4761877A1Pending Publication Date: 2026-06-24RODERS GMBH
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Patent Information

Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
RODERS GMBH
Filing Date
2024-11-18
Publication Date
2026-06-24

AI Technical Summary

Technical Problem

Existing spindle arrangements for machine tools face challenges in achieving both high rigidity for large tools and high speeds for small tools, leading to undesirable vibrations and inadequate machining quality.

Method used

The spindle arrangement incorporates a second centering interface on the spindle housing in addition to the first centering interface on the spindle shaft, allowing for the use of a single clamping set to clamp tool holders on both the spindle shaft and housing, thereby enabling expanded application possibilities for various tool holder elements and front spindles.

Benefits of technology

This configuration enhances the variability of the spindle arrangement, allowing for secure clamping and high-speed operation of auxiliary spindles while maintaining rigidity for standard tools, thereby improving machining accuracy and reducing vibrations.

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  • Figure EP2024082682_19062025_PF_FP_ABST
    Figure EP2024082682_19062025_PF_FP_ABST
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Abstract

The invention relates to a spindle arrangement of a machine tool, comprising: a main spindle (2) having a spindle shaft (3), a spindle housing (4) and precisely one clamping set (8); a first centring interface (6) on the spindle shaft (3); and a second centring interface (7) on the spindle housing (4), wherein the first centring interface (6) is designed to provide a first centring between the spindle shaft (3) and a tool holder (100), wherein the clamping set clamps the tool holder (100), and wherein the second centring interface (7) is designed to provide a second centring between the spindle housing (4) and a tool holder element (5), wherein the clamping set (8) clamps the tool holder element (5) in such a way that a gap (10, 11) remains at the first centring interface.
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