Centrifugal Pendulum Blank Layout for Lower Tool Cost and Better Damping
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Solution Overview
Problem
Current methods for manufacturing centrifugal pendulums are costly and inefficient, with high tool and unit costs, and limited effectiveness in absorbing torsional vibrations due to the axial extent of pendulum masses being restricted by the thickness of the pendulum mass support.
Innovation Solution
A method involving punching and forming of sheet-metal blanks to create pendulum components, where pendulum masses are integrated into the pendulum mass support, allowing for reduced waste and tooling costs, and enabling the pendulum masses to be hardened and separated for optimal vibration absorption, with pendulum masses accommodated directly in apertures of the support, allowing for a more effective and cost-efficient centrifugal pendulum design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If pendulum masses are accommodated in cutouts in the pendulum mass support with axial extent limited to the thickness of the support, then the device complexity is reduced, but the mass effectiveness for absorbing torsional vibrations is insufficient
Solution Approach 1:
The patent extends the pendulum masses axially beyond the pendulum mass support in the radial direction, utilizing the space between the support and the pendulum rollers. This dimensional extension allows the pendulum masses to achieve greater mass effectiveness for vibration absorption without increasing the structural complexity of the support itself, as the extended portions simply utilize existing clearance space.
2Manufacturing precision
If traditional punching and forming methods are used to manufacture pendulum components, then manufacturing precision is achieved, but tool and unit costs are high
Solution Approach 1:
The patent integrates the manufacturing of the pendulum mass support and pendulum masses into a single punching and forming process using one blank. This merging of previously separate manufacturing operations reduces tooling requirements and unit costs while maintaining the precision needed for proper assembly and function of the centrifugal pendulum components.
Solution Approach 2:
The patent introduces predetermined breaking points in the blank that allow the pendulum masses to be separated from the support after hardening. This segmentation enables the components to be manufactured together for cost efficiency but separated for functional independence, combining the benefits of both integrated and separate manufacturing approaches.
3Ease of manufacture
If pendulum masses are manufactured separately and then assembled, then ease of manufacture is improved, but the axial extent and mass effectiveness are limited
Solution Approach 1:
The patent performs preliminary forming of the pendulum masses with axial extension beyond the support during the initial punching process, before hardening and separation. This preliminary action creates the optimal mass geometry and axial extent that would be difficult to achieve through separate manufacturing and assembly operations, while still allowing for subsequent separation at predetermined breaking points.
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 approach reduces manufacturing costs and enhances the effectiveness of centrifugal pendulums in absorbing torsional vibrations by allowing pendulum masses to be accurately positioned and hardened in a way that maximizes their mass and movement, leading to improved vibration isolation in drive trains.
Implementation Method 1
The blank is as a rule hardened as a whole, and subsequently the pendulum mass support and the pendulum masses are separated from one another
Implementation Method 2
In the case of rotating pendulum mass supports, the pendulum masses are accelerated radially outward and can be moved on a predetermined pendulum path by means of the pendulum bearings, enabling them to move counter to the action of the centrifugal force on relatively small radii when torsional vibrations occur
Implementation Method 3
pendulum masses, which are arranged distributed over the circumference in such a way that they can perform a pendulum motion
Data Source
AI summary
The invention relates to a method for manufacturing a centrifugal pendulum (1) as well as a centrifugal pendulum (1) which is manufactured using said method and which comprises pendulum components (13, 14) made of sheet metal, i.e. a pendulum mass support (2) that is arranged about an axis of rotation (d), and pendulum masses (3) that are distributed about the circumference. In order to reduce tool costs and the cost per item, at least one punched blank (9) comprising at least two pendulum components (13, 14) is manufactured, whereupon the pendulum components (13, 14) are separated from one another.