Grinding-Supporting Device for Crankshaft Simultaneous Machining
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Solution Overview
Problem
The existing method for multiple-bearing grinding of workpieces increases machining time as it requires separate processing steps for supporting elements, limiting simultaneous machining and increasing overall production time and costs.
Innovation Solution
The method involves grinding the supporting element seat and bearing points simultaneously using a grinding wheel set, with force-absorbing elements engaging after the supporting element seat is partially ground, allowing for continuous machining and reducing the need for separate processing steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the supporting element seat is ground separately before the bearing points, then the supporting element can be properly set for compensating deformations, but the machining time is considerably increased
Solution Approach 1:
The patent combines the grinding of the supporting element seat and the bearing points into a single simultaneous operation. The grinding wheel set includes multiple wheels that can grind the supporting element seat and multiple bearing points at the same time, eliminating the need for separate processing steps and significantly reducing total machining time while maintaining precision through coordinated grinding forces
Solution Approach 2:
The invention enables continuous machining by having the grinding wheel set operate on multiple surfaces simultaneously without interruption. The supporting element is set during the grinding process itself, allowing the machining operation to continue without stopping for separate setup and grinding steps, thereby maintaining continuous useful action throughout the process
2Productivity
If multiple bearing points are ground simultaneously by a grinding wheel set, then productivity is improved, but the workpiece deforms due to grinding forces
Solution Approach 1:
The supporting element acts as an intermediary device that compensates for workpiece deformation caused by simultaneous grinding forces. It provides additional support points that counterbalance the grinding forces, preventing excessive deflection and maintaining dimensional accuracy during high-productivity simultaneous grinding operations
Solution Approach 2:
The invention changes the support conditions by introducing adjustable supporting elements with variable support forces. These elements can be adjusted to provide optimal support at different locations and with different force magnitudes, compensating for deformation caused by simultaneous grinding and maintaining geometric accuracy throughout the machining process
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 significantly reduces machining time and costs by enabling simultaneous grinding of bearing points and supporting element seats, improving dimensional accuracy and production efficiency, especially in mass-produced crankshafts.
Implementation Method 1
a grinding wheel for grinding a supporting element seat like a steady rest seat is fed in to at least one bearing point and grinds the supporting element seat
Data Source
AI summary
In an apparatus for multiple-bearing grinding of workpieces, such as crankshafts, wherein a support element seat occurs at a bearing point at the same time as the grinding of the main bearing, a grinding-supporting unit is used that contains a grinding spindle head having at least one grinding disk and support elements in the form of support jaws or support bodies that can be swiveled in. After the support point seat is ground, the support elements are brought into contact there-with and support the workpiece during the further machining. The simultaneous grinding of the support point seat and several bearing points results in a reduction in the machining time in the grinding of the workpiece compared to the prior art.