Gear Skiving Tooth Flank Modification With Transverse Tool Motion
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Solution Overview
Problem
Current methods for producing tooth flank modifications on gear toothings are not cost-effective, requiring extensive fine machining and tool dressing, which increases machining time and costs.
Innovation Solution
The method involves using a skiving tool to create tooth flank modifications by moving it relative to the workpiece along both a longitudinal and a transverse axis, allowing for more economical production of tooth flank modifications, such as entanglements, which can be done before fine machining, thereby reducing overall machining time and compensating for hardness distortions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If fine machining is used to create tooth flank modifications, then manufacturing precision is improved, but productivity deteriorates due to extended machining time
Solution Approach 1:
The invention applies preliminary action by creating tooth flank modifications during the rough skiving process itself, before the final fine machining operation. The skiving tool is equipped with specific cutting edges that can generate the desired tooth flank geometry (such as crowning or barrel shaping) during the initial material removal phase, eliminating the need for separate fine machining steps to achieve these modifications.
Solution Approach 2:
The invention merges two previously separate operations into one: the rough skiving process and the tooth flank modification process. By integrating the modification capability into the skiving tool and process, the invention combines material removal with geometry shaping in a single operation, thereby improving productivity without sacrificing the required manufacturing precision.
2Manufacturing precision
If traditional fine machining processes are used, then manufacturing precision is improved, but loss of time increases due to multiple operations and tool dressing
Solution Approach 1:
The skiving tool performs tooth flank modifications during the rough skiving operation itself, executing the modification action preliminarily before fine machining. This preliminary creation of tooth flank geometry eliminates the need for subsequent fine machining operations to achieve these modifications, significantly reducing total machining time while maintaining precision requirements.
Solution Approach 2:
The invention extracts the tooth flank modification function from the separate fine machining process and integrates it into the rough skiving process. By taking out this specific function and combining it with the existing skiving operation, the invention eliminates redundant machining steps and tool dressing operations, thereby reducing overall time loss.
3Ease of manufacture
If process complexity is reduced by using simpler tools, then ease of manufacture is improved, but manufacturing precision deteriorates
Solution Approach 1:
The skiving tool is designed with multi-functionality, serving both as a roughing tool for material removal and as a modification tool for creating tooth flank geometry. By making the skiving tool universal and capable of performing multiple functions, the invention avoids the need for separate specialized tools, thereby improving ease of manufacture while maintaining the precision required for tooth flank modifications.
Data Source
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AI summary
Described and illustrated is a method for generating tooth flank modifications, in particular twists, on tooth flanks (10,10',11,11') of at least one workpiece toothing (8,8') of at least one workpiece (2), in particular gear (2). To make the production of tooth flank modifications on workpiece gear teeth more economical, it is provided that the tooth flank modifications are produced by gear skiving using a gear skiving tool (6), that the workpiece (2) is driven to rotate about a workpiece axis of rotation (AWS) and the gear skiving tool (6) is driven to rotate about a tool axis of rotation (AWZ) arranged at an angle (α) to the workpiece axis of rotation (AWS), in particular skew, that the gear skiving tool (6), which rotates in particular about the tool axis of rotation (AWZ), is brought into machining engagement with the workpiece (2), which rotates in particular about the workpiece axis of rotation (AWS).that the gear skiving tool (6), which is in machining engagement with the workpiece (2) and rotates about the tool axis of rotation (AWZ), is moved relative to the workpiece (2), which rotates about the workpiece axis of rotation (AWS), along a longitudinal axis (L) that is at least substantially parallel to the workpiece axis of rotation (AWS) or the tool axis of rotation (AWZ), and that, in order to generate the tooth flank modifications, the gear skiving tool (6), which moves along the longitudinal axis (L), is moved relative to the workpiece (2) along at least one transverse axis (Q) that is at least substantially perpendicular to the longitudinal axis (L).