Adjustable Gear Back-Taper Tool for Carrier Deformation Compensation
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Solution Overview
Problem
Existing tools with elongated tool carriers used for producing back-tapers on gearwheels face deformation issues due to bending and torsion stresses during machining, leading to precision problems in forming back-tapers on wide gearwheels.
Innovation Solution
A tool with adjustable blades that can compensate for deformations of the tool carrier or holder by adjusting the position of at least one blade relative to the other, ensuring precise formation of back-tapers without requiring stiffening of the tool carrier or holder.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the tool carrier is made elongated to machine wide gearwheels, then the machining capability for wide teeth is improved, but the tool carrier deforms due to bending and torsion stresses
Solution Approach 1:
The blade positions are made adjustable rather than fixed, allowing the tool to adapt its geometry to compensate for deformations that occur during machining of wide gearwheels. This dynamic adjustment capability resolves the contradiction by enabling the same elongated tool carrier to maintain precision across different workpiece widths and deformation conditions.
Solution Approach 2:
The invention changes the positional parameters of the blades relative to each other through adjustment mechanisms. By varying the distance and orientation parameters of the blades, the tool can compensate for the bending and torsion deformations of the elongated carrier, thereby maintaining manufacturing precision while processing wide gearwheels.
2Manufacturing precision
If the tool carrier is stiffened to prevent deformation, then the manufacturing precision is improved, but the device complexity increases
Solution Approach 1:
Rather than making the tool carrier statically stiffer through structural complexity, the invention introduces dynamic adjustability of the blades. This allows the simpler carrier structure to achieve the same precision goal by adapting blade positions to compensate for deformations, avoiding the need for complex stiffening measures.
Solution Approach 2:
The invention segments the tool into adjustable components (blades) that can be independently positioned. This segmentation allows precision to be achieved through coordinated adjustment of individual blade positions rather than requiring the entire tool carrier to be statically stiffened, thereby reducing overall device complexity.
3Device complexity
If the blade positions are fixed, then the device complexity is reduced, but the ability to compensate for deformations is lost
Solution Approach 1:
The invention introduces minimal dynamic elements (adjustable blade mounts) into an otherwise simple fixed-structure tool. This selective dynamic capability allows the blades to compensate for carrier deformations while maintaining the overall simplicity of the tool structure, resolving the contradiction between simplicity and adaptability.
Solution Approach 2:
Rather than making the entire tool structure complex and adjustable, the invention applies adjustability only locally at the blade mounting positions where it is most needed for compensation. This localized quality approach maintains overall device simplicity while providing the necessary adaptability for precision machining despite deformations.
Data Source
AI summary
The invention makes a tool available, which allows highly precise, simultaneous production of two back-tapers on the tooth flanks of the teeth of a workpiece in the form of a gearwheel, independent of their width. For this purpose, the invention provides that the tool includes a tool carrier configured in elongated manner, in the manner of a journal, and oriented coaxial to its central longitudinal axis of the tool, and includes at least two blades, which come into engagement with the tooth to be machined, in each instance, removing chips during use, wherein the blades are held on the tool carrier at a distance from one another in the longitudinal direction of the tool carrier and extend over a partial length of the tool carrier, in each instance, in terms of their width. According to the invention, in this regard the position of at least one of the blades is adjustable in relation to the other blade, so as to balance out deformations of the tool carrier that occur during use. The invention also states a method for simultaneous production of at least two back-tapers on the teeth of a workpiece in the form of a gearwheel, by means of a tool according to the invention.