Stepped Helical Gear Powder Compaction With a One-Piece Die
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Solution Overview
Problem
The manufacturing of stepped helical gears is complex, costly, and time-consuming due to their intricate geometry, particularly when using two-piece dies that require separation and multiple compression steps.
Innovation Solution
A one-piece die is used to fill and compress metallic powder material, allowing for a single-step powder compacting process to form a stepped mono-block helical gear component with integrated cylindrical portions and helical teeth structures, facilitating efficient production with improved radial and tangential tolerances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a two-piece die is used to manufacture stepped helical gear, then the gear can be formed with stepped cylindrical portions, but the die must be separated and multiple compression steps are required, increasing process complexity and time
Solution Approach 1:
The patent merges the two separate die pieces into a single integrated die structure with one opening that defines both stepped cylindrical portions. This eliminates the need for die separation and multiple compression steps, simplifying the manufacturing process while maintaining the stepped geometry of the gear component.
2Shape
If a two-piece die is used to manufacture stepped helical gear, then the gear can be formed with stepped cylindrical portions, but multiple filling and compression steps are required, increasing manufacturing time
Solution Approach 1:
The patent combines multiple filling and compression operations into a single step by using a one-piece die with an integrated opening. The metallic powder material is filled once and compressed once to form the complete stepped gear component, significantly reducing manufacturing time and improving productivity.
3Shape
If a two-piece die is used to manufacture stepped helical gear, then the gear can be formed with stepped cylindrical portions, but the helical lead of the two teeth structures causes interlock inside the die, complicating the removal process
Solution Approach 1:
The patent integrates both helical teeth structures into a single die opening, allowing the workpiece to be formed and removed as one unit. The unified die structure eliminates interlocking issues between separate die pieces, making workpiece removal straightforward and improving ease of manufacture.
4Shape
If conventional manufacturing methods are used for stepped helical gear, then the complex geometry can be achieved, but the process is costly and time consuming
Solution Approach 1:
The patent consolidates multiple manufacturing operations into a single powder compacting step using a one-piece die. This integrated approach maintains the complex stepped helical geometry while dramatically improving production efficiency and reducing costs compared to conventional multi-step manufacturing methods.
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
This method simplifies the manufacturing process, enhances reproducibility, and achieves optimal radial and tangential tolerances, ensuring smooth transmission and long-term durability of the gear component by using a one-piece die for powder compacting, reducing production time and costs.
Implementation Method 1
compressing the metallic powder material by a compression ram to form a workpiece of the gear component
Implementation Method 2
sintering the workpiece
Data Source
Figure 1~3
AI summary
The present disclosure relates to a method for manufacturing a gear component, a gear component, a transmission unit for a vehicle comprising such a gear component and a vehicle comprising such a transmission unit. The method comprises providing a die with an opening, filling the opening with a metallic powder material, compressing the metallic powder material by a compression ram to form a workpiece of the gear component and sintering the workpiece. An inner wall of the opening comprises a first cylindrical opening portion with a first opening helical teeth structure and a second cylindrical opening portion with a second opening helical teeth structure. A first opening base diameter of the first cylindrical opening portion differs from a second opening base diameter of the second cylindrical opening portion. The die is constituted of one-piece.