Single-Tool Gear Roughing and Abrasive Flank Finishing
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Solution Overview
Problem
Existing methods for gearing work wheels require multiple tool changes and complex setups for producing coarse and fine toothing, which are inefficient and cumbersome.
Innovation Solution
A tool with abrasive tooth flanks that can perform both initial tooth production and fine machining without tool changes, by adjusting the axis cross angle and relative position between the tool and work wheel, allowing for sequential machining steps with a single tool.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If separate cutting tools are used for roughing and fine-machining gear teeth, then manufacturing precision is improved, but device complexity and loss of time increase due to multiple tool changes and setups
Solution Approach 1:
The patent combines roughing and fine-machining functions into a single tool by equipping the cutting tool with both cutting edges and abrasive tooth flanks. This merging eliminates the need for separate tools and intermediate setups, thereby reducing device complexity while maintaining the ability to achieve both coarse and fine gear tooth surfaces
Solution Approach 2:
The cutting tool is designed with multi-functionality, serving both as a roughing tool (via cutting edges) and a fine-machining tool (via abrasive tooth flanks). This universal tool can perform multiple machining operations without requiring tool changes, thus reducing setup complexity and time loss while ensuring manufacturing precision through controlled transitions between operations
2Manufacturing precision
If multiple tool changes are performed for roughing and fine-machining, then manufacturing precision is improved, but productivity decreases due to increased loss of time
Solution Approach 1:
The patent enables continuous machining operations by allowing the same tool to transition from roughing to fine-machining without removal from the workpiece. The cutting edges perform roughing first, then the abrasive tooth flanks perform fine-machining in sequence, maintaining continuous useful action and eliminating idle time associated with tool changes, thereby improving productivity while preserving precision
Solution Approach 2:
The tool is pre-configured with both cutting edges and abrasive tooth flanks before approaching the workpiece. This preliminary preparation allows the tool to immediately perform roughing followed by fine-machining in a single approach, eliminating the need for intermediate tool changes and setups, thus improving productivity without compromising the precision achieved through sequential operations
3Productivity
If a single tool is used for both roughing and fine-machining, then productivity is improved, but manufacturing precision may deteriorate without proper differentiation of tool surfaces
Solution Approach 1:
The tool exhibits local quality differentiation with distinct cutting edges for roughing and abrasive tooth flanks for fine-machining. Each surface has specialized properties optimized for its specific function: cutting edges for material removal and abrasive surfaces for precision finishing. This local quality ensures that manufacturing precision is maintained despite using a single tool, as each region of the tool is optimized for its designated operation
4Manufacturing precision
If intermediate setups are required between roughing and fine-machining, then manufacturing precision is improved, but ease of operation deteriorates
Solution Approach 1:
The patent merges roughing and fine-machining operations into a single continuous process using one tool with dual功能的 surfaces. This eliminates intermediate setups and the associated operational complexity, making the machining process simpler and easier to operate while maintaining precision through the controlled sequence of cutting edge followed by abrasive flank engagement
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
Enables efficient production of both coarse and fine toothing in successive machining steps with reduced setup complexity, improving the precision and efficiency of gear manufacturing.
Implementation Method 1
the abrasive tooth flanks bear against the tooth flanks of the work wheel in order to fine-machine the tooth flanks
Data Source
Figure 1~2
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Figure 5~6
AI summary
The invention relates to a method for cutting teeth into working gears (1) using a tool (2), the tool main part (11) of which has a plurality of cutting teeth (3) which are arranged about a rotational axis (5) and which protrude radially from the tool main part (11), said cutting teeth (3) forming an end face (7), two tooth flanks (6, 6') which point away from each other, and cutting edges (18, 19). The cutting edges (18, 19) are formed from the tooth flank (6, 6') edges adjoining the end face (7). In a first method step, tooth gaps (17) which form tooth flanks (14, 14') are produced in the working gear (1) by means of the cutting edges (18, 19) using a machining process in a first position of the tool (2) relative to the working gear (1), and in a second method step, the working gear (1) tooth flanks (14, 14') produced by the cutting edges (18, 19) are fine-machined by an abrasive tool surface. The aim of the invention is to develop the known machining method so as to be advantageous for use and to provide a tool and a device which are suitable for the method. According to the invention, this is achieved in that the abrasive tool surfaces are made of the tooth flanks (6, 6') of the tool (2), which operates in a second position that differs from the first position relative to the working gear (1) in the second method step.