Swiss-type lathe tool holder side access for quick insert change
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Solution Overview
Problem
The existing tool carriers for sliding head lathes are difficult to access in cramped conditions, making it challenging to change cutting inserts quickly without removing the tool carrier, which affects the accuracy and efficiency of the machining process.
Innovation Solution
A tool carrier design with a base body, a receptacle for the cutting insert, and a threaded bore with a set screw and angled engagement opening allows for easy insertion and secure fixation of the cutting plate, enabling quick changeovers without removing the tool carrier, using an Allen key for rotation under tight spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional screw fixation system is used for the cutting insert, then the cutting insert can be securely fixed, but the screw is difficult to access in cramped conditions making insert change slow and requiring tool carrier removal
Solution Approach 1:
The tool carrier is segmented into functional zones: the receptacle for the cutting insert, the threaded bore for fixation, and crucially, the side opening that provides external access to the cavity. This segmentation allows the fastening mechanism to be operated from the side rather than requiring access to the bottom where the screw head would traditionally be located, enabling insert changes without removing the tool carrier.
Solution Approach 2:
The patent introduces a side opening as an intermediary access path between the external environment and the cavity containing the fastening element. This side opening acts as a mediator that allows the Allen key to reach the cavity and operate the fastening element without requiring direct access to the bottom of the receptacle, thus solving the accessibility problem in cramped conditions.
2Ease of operation
If the tool carrier is removed to change the cutting insert, then the insert can be easily accessed and changed, but the tool carrier must be readjusted afterward affecting machining accuracy
Solution Approach 1:
The side opening is pre-configured in the tool carrier body to provide access to the cavity. This preliminary structural arrangement ensures that the fastening element can be operated from the side without removing the tool carrier, eliminating the need for subsequent readjustment and preserving machining accuracy.
3Device complexity
If a simple receptacle design is used, then the tool carrier structure remains simple, but the cutting insert cannot be securely fixed or quickly released
Solution Approach 1:
The tool carrier is segmented into functional zones: the receptacle for the cutting insert, the threaded bore for fixation, and crucially, the side opening that provides external access to the cavity. This segmentation allows the fastening mechanism to be operated from the side rather than requiring access to the bottom where the screw head would traditionally be located, enabling insert changes without removing the tool carrier.
Solution Approach 2:
The side opening is strategically positioned to provide localized access to the cavity while maintaining the overall simplicity of the tool carrier structure. This localized modification allows complex functionality (side access for fastening element operation) without requiring complex overall structure, thus resolving the contradiction between structural simplicity and operational ease.
Data Source
AI summary
The invention relates to a tool holder for a Swiss-type lathe. This tool holder comprises a base body (2), a receptacle configured to receive a cutting insert (4), a threaded bore extending orthogonally to the receptacle through the base body (2) and terminating at one end in the receptacle, and a threaded stud (3) having an external thread. The threaded stud (3) is arranged in the threaded bore and has a cavity connected to the receptacle by a connecting opening. At least one opening extends from the cavity through the external thread. The opening is open towards the receptacle. The invention further relates to a tool set comprising the tool holder and a cutting insert (4). The cutting insert has a base region with at least one cutting edge (42, 43) and an opening extending through the base region.A connecting element (5) is arranged in the through opening, extending out of the through opening and having a fastening element outside the through opening. The fastening element has a substantially rectangular shape with a first side and a second side. Its first side extends orthogonally to the through opening. Its second side also extends orthogonally to the through opening. The first side is longer than the second side.