Preloaded Guide Body for Precise Machining of Spaced Bearing Bores
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Solution Overview
Problem
Existing machining tools, such as line boring bars, face challenges in maintaining precise guidance and support during the drilling process of bearing shafts, particularly in axially spaced bearing bores, due to the difficulty in direct support using guide elements.
Innovation Solution
A machining tool with a cutting body and a guide body, where the guide body is preloaded against the bore wall, providing a secure seating and preventing the tool from lifting away, and an adjusting mechanism allows for adaptability to different bore diameters and orientations, ensuring precise operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If guide elements are directly supported in the area of cutting edges (as in reamers), then guidance precision is improved, but the machining tool becomes difficult to apply in certain bearing configurations
Solution Approach 1:
The machining tool is divided into two distinct functional bodies: a cutting body with cutting edges for material removal and a guide body with guide elements for guidance and support. This segmentation allows each body to be optimized for its specific function, enabling the tool to work in configurations where direct support at cutting edges would be difficult.
Solution Approach 2:
The guide body acts as an intermediary between the cutting body and the workpiece bearing surface. By providing guidance and support through guide elements that contact the bearing outer radius, the guide body mediates the interaction between the cutting tool and workpiece, enabling precise operation without direct support at the cutting edges.
2Manufacturing precision
If the machining tool is preloaded against the bearing bore wall, then machining precision is improved through secure seating, but the tool structure becomes more complex
Solution Approach 1:
The guide body is designed with adjustable positioning relative to the cutting body, allowing dynamic adaptation to different bearing bore diameters. This adjustability enables the preloading mechanism to maintain optimal contact pressure and secure seating across various workpiece sizes without requiring completely different tool designs.
Solution Approach 2:
The tool incorporates adjustable parameters including the radial position of the guide body relative to the cutting body and the positioning of guide elements on the guide body. These parameter adjustments allow the preloading force and contact conditions to be optimized for different bearing configurations, achieving high precision while maintaining structural efficiency.
Data Source
AI summary
The invention relates to a machining tool (2) for processing a bore in a workpiece, in particular for simultaneous processing of a plurality of bores distanced from one another by a predefined distance, said machining tool having a cutting body (8) extending in the direction of a tool longitudinal axis (4) and having at least one cutting element (12) arranged circumferentially, and a guide body (10), which adjoins the cutting body (8) in the direction of the tool longitudinal axis (4), is fastened to the cutting body (8) and has at least one circumferentially arranged guide element (20). The guide body (10) is free of cutting elements (12) and the guide body (10) is designed to exert a preload force such that, during use, the at least one guide element (20) is preloaded against a bearing for the guide body (10).