Exchangeable Stop for Drilling Tools with Rotating Sleeve
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Solution Overview
Problem
Existing microstop adapters for drilling, milling, or countersinking tools often result in poor concentricity and inconsistent angular position due to incorrect mounting or mounting play, leading to reduced machining quality.
Innovation Solution
An exchangeable stop system with a freely rotating stop sleeve mounted via a plain or roller bearing, featuring an adjusting ring with an internal thread for precise axial adjustment, and a locking mechanism to secure the stop depth, ensuring optimal concentricity and defined contact angle during machining.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a microstop adapter with drill shank and freely rotatable stop sleeve is used, then the stop depth can be adjusted, but poor concentricity and inferior drilling/milling results occur due to incorrect mounting or mounting play
Solution Approach 1:
The device is divided into functionally independent segments: the drill shank for rotation, the stop sleeve for depth control, and the bearing assembly for precision mounting. This segmentation allows each component to perform its specific function optimally while maintaining overall concentricity, resolving the contradiction between adjustable stop depth and machining precision.
2Ease of operation
If the stop sleeve is freely rotatable about the tool head, then the tool can rotate during machining, but mounting play causes incorrect angular position and reduced machining quality
Solution Approach 1:
A bearing assembly acts as an intermediary between the freely rotatable stop sleeve and the tool head. This bearing mediates the rotational motion, allowing free rotation during machining while eliminating mounting play that would cause angular position errors, thus maintaining both ease of operation and machining precision.
3Adaptability or versatility
If different tool heads are exchanged in the adapter receptacle, then versatility is improved, but concentricity deteriorates due to incorrect mounting
Solution Approach 1:
The adapter receptacle is designed with universal mounting features that accommodate different tool heads while maintaining consistent concentricity. Standardized bearing interfaces and mounting mechanisms allow various tool heads to be exchanged without compromising precision, achieving both versatility and manufacturing quality.
4Ease of operation
If pressure is exerted on the tool in different directions, then adaptability to handling is improved, but angular position varies and machining quality reduces
Solution Approach 1:
The bearing assembly employs spherical or radial contact surfaces that allow the tool to accommodate pressure from different directions while maintaining a consistent angular position. The curved geometry of the bearing interfaces distributes loads evenly, enabling handling flexibility without compromising machining precision.
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
The solution ensures precise stop adjustment and optimal concentricity, maintaining consistent machining quality even with rough handling, and allows for easy adaptation to various tool shank diameters, enhancing usability and reducing acquisition costs.
Implementation Method 1
a stop sleeve (16) which is mounted on the adjusting ring (22) in a freely rotating manner by means of a plain or roller bearing (14)
Data Source
Figure 1
Figure 2
Figure 3a~3b
AI summary
The invention relates to an exchangeable stop (12) for a rotating drilling, milling or countersinking tool (10). The stop comprises a stop sleeve (16) that is coupled to a plain bearing or roller bearing (14) so as to be freely rotatable about the tool (10), wherein a first bearing bush (18) of the bearing (14) carries the stop sleeve (16) and a second bearing bush (20) of the bearing (14) is fitted on an adjusting ring (22) for conjoint rotation. The adjusting ring is axially adjustable with respect to an adjusting sleeve (24) or a shank (28) of the tool (10) by means of an adjusting thread (26) attached to the outer circumference of the adjusting sleeve (24) or an adjusting thread (26) attached to the tool shank (28). The adjusting sleeve (24) is fastenable in an exchangeable manner on a shank (28) of the tool (10) for conjoint rotation, or the adjusting ring (22) is mounted or screwed in an exchangeable manner onto the adjusting thread (26) of the tool (10).