Orbital Forging Shaft Support for Compact High-Angle Crimping
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Solution Overview
Problem
Conventional orbital forging devices are large and costly due to the need for a thrust sliding bearing with a partially spherical sliding surface, and setting a swing angle of the molding die to 15 degrees or more increases the device size and manufacturing cost, making it difficult to form crimped portions efficiently.
Innovation Solution
The orbital forging device features a swinging shaft with a rotating body supported by a rolling bearing that prevents axial movement, eliminating the need for a thrust sliding bearing and allowing a larger swing angle of 15 to 30 degrees, reducing device size and cost, and using a detachable bearing holder to adjust the inclination angle for optimal operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a thrust sliding bearing with a partially spherical sliding surface is used to support the swinging shaft, then the orbital forging device can operate, but the device size and manufacturing cost increase significantly
Solution Approach 1:
The invention extracts and eliminates the thrust sliding bearing from the orbital forging device. By using a swinging shaft that rotates on a fixed axis without requiring a thrust sliding bearing, the patent removes the complex partially spherical sliding surface component, thereby reducing device size and manufacturing cost while maintaining operational stability through the simplified rotational support mechanism
Solution Approach 2:
The patent replaces the expensive, complex thrust sliding bearing with a simpler, more economical rotational support system. The swinging shaft directly rotates on a fixed axis without requiring precision-machined spherical sliding surfaces, reducing manufacturing cost and device complexity while achieving the same functional outcome
2Productivity
If the swing angle of the molding die is set to 15 degrees or more, then the crimped portion can be formed with reduced machining load, but the device size and manufacturing cost increase
Solution Approach 1:
The invention implements a dynamic swing mechanism where the molding die can oscillate at variable angles (15-30 degrees) relative to the workpiece axis. This dynamic capability allows the system to optimize the swing angle for reducing machining load while the compact design achieves this through efficient spatial arrangement rather than increased device dimensions
Solution Approach 2:
The patent enables adjustment of the swing angle parameter within the range of 15-30 degrees, allowing optimization of machining load. By changing this operational parameter rather than increasing device size, the system achieves reduced machining load while maintaining compact dimensions and controlling manufacturing cost
3Device complexity
If a compact device design is used, then device size and cost are reduced, but it becomes difficult to achieve the necessary swing angle for efficient crimping
Solution Approach 1:
The invention resolves the contradiction by introducing a multi-dimensional swing mechanism. The molding die achieves the required 15-30 degree swing angle through a combination of rotational and oscillatory movements in different dimensions, allowing compact device design while maintaining full operational capability for efficient crimping
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 design enables the formation of crimped portions with reduced machining load and suppressed deformation of the inner ring, resulting in a compact and cost-effective orbital forging device capable of manufacturing hub unit bearings with stable preload for vehicles.
Implementation Method 1
the end section on the other side in the axial direction of the swinging shaft is supported to the driving mechanism in a state where a movement toward the one side in the axial direction is prevented
Implementation Method 2
a convex spherical surface section that spherically engages with a concave spherical surface section
Data Source
AI summary
Provided is construction which is able to downsize an orbital forging device comprising a spherical seat with shaft that swings and rotates with a molding die. The end section on the other side in the axial direction of the swinging shaft 13 is supported with respect to the driving mechanism 17 in a state where the movement toward one side in the axial direction (lower side) is prevented, and a member for preventing the swinging shaft 13 from moving toward the one side in the axial direction with respect to the frame 10 is not assembled in a section which is located between the convex spherical seat 14 and the driving mechanism 17 in the axial direction of the swinging shaft 13.