CV Joint Component Gripping with Phase-Matched Collet Chuck
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing gripping methods for constant velocity universal joint components with female splines and track grooves are prone to insufficient gripping force, leading to slipping during processing, tool collisions, and potential deformation, especially when phase variations occur between the chuck and workpiece.
Innovation Solution
A gripping method using a collet chuck with a stopper and contact metal member, incorporating tool relief grooves, that measures and matches phase differences between the track grooves and female spline, ensuring stable gripping and preventing tool collisions through precise alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional collet chuck is used to grip the constant velocity universal joint component, then the gripping operation is simple, but the gripping force is insufficient causing the workpiece to slip during processing
Solution Approach 1:
The gripping device is divided into multiple functional components: a collet chuck for radial gripping, a contact metal member with relief grooves for axial positioning, and a stopper for phase alignment. This segmentation allows each component to perform its specific function optimally, ensuring reliable gripping without excessive overall complexity
Solution Approach 2:
The contact metal member acts as an intermediary between the collet chuck and the workpiece, providing relief grooves that prevent tool collisions. The stopper serves as an intermediary mechanism to align the phase between the chuck and workpiece, ensuring proper positioning without direct complex interaction between the gripping elements and workpiece features
2Reliability
If the phase between the chuck and workpiece is not matched, then the gripping device is easier to operate, but tool collisions occur during processing
Solution Approach 1:
The stopper is positioned in advance to match the phase between the chuck and workpiece before processing begins. The relief grooves are pre-formed in the contact metal member to anticipate and prevent tool collisions. This preliminary alignment and preparation eliminate the need for complex real-time adjustments during operation
Solution Approach 2:
The phase matching and collision prevention functions are achieved through mechanical design features (stopper positioning, relief groove geometry) rather than complex mechanical adjustment systems. This substitution simplifies the operation while maintaining high processing quality
3Reliability
If the gripping force is increased to prevent slipping, then the gripping stability is improved, but the workpiece may be deformed
Solution Approach 1:
The gripping force is applied locally at specific points through the collet chuck's radial clamping action on the workpiece OD, while the contact metal member provides distributed axial support through its relief grooves. This localized gripping approach prevents excessive force from deforming the workpiece while maintaining sufficient stability
Solution Approach 2:
The relief grooves in the contact metal member are designed in advance to cushion and distribute the forces during processing, preventing concentrated loads that could deform the workpiece. The stopper is pre-positioned to provide gentle phase alignment without applying excessive gripping force
4Reliability
If relief grooves are added to prevent tool collisions, then the processing safety is improved, but the device complexity increases
Solution Approach 1:
The contact metal member serves multiple functions: it provides relief grooves for collision prevention, maintains axial positioning of the workpiece, and transmits gripping forces from the collet chuck. This multi-functionality reduces the need for separate components, thereby limiting the increase in overall device complexity
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
Prevents slipping and tool collisions, ensuring high-quality processing by maintaining stable contact and suppressing vibrations, even with varying phase differences between the track grooves and female spline.
Implementation Method 1
when the shaft member 3 is pulled in the direction indicated by the arrow of FIG. 8 from the state illustrated in FIG. 8, the collet 1 is pushed by the outer collar portion 3b in the direction indicated by the arrow of FIG. 8. When the collet 1 is pushed in the direction indicated by the arrow of FIG. 8, the tapered surface 5 of the collet 1 is lifted along a slope of the fitting portion 2a having the conical shape. In this manner, the collet 1 is increased in diameter, and the radially outer surface 1a of the collet 1 and a radially inner surface Wa of the workpiece W are brought into press contact with each other, thereby being capable of gripping the workpiece W.
Data Source
AI summary
Provided is a gripping method including: a phase matching step of matching tool relief grooves of a contact metal member and track grooves of a constant velocity universal joint component with each other in phase; a measuring step of measuring phase differences between the track grooves of the constant velocity universal joint component and a female spline of the constant velocity universal joint component; a matching step of matching, based on a result of the measuring step, a stopper with a recessed portion of the female spline having the smallest phase difference and gripping the constant velocity universal joint component by a collet chuck. Under a state in which the constant velocity universal joint component is gripped by the collet chuck, the contact metal member holds the constant velocity universal joint component.