Grinding Center Common Slide Rest for Crankshaft Bearings
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Solution Overview
Problem
Existing grinding centers for crankshafts require significant space and complexity to simultaneously grind main bearings, pin bearings, and end-side surfaces, leading to inefficiencies and increased operational complexity.
Innovation Solution
A grinding center design that combines two stations to grind main bearings and pin bearings simultaneously, using a profiled grinding wheel inclined relative to the Z axis, with both stations sharing a common compound slide rest to simplify control and reduce components, allowing for efficient and rapid grinding of all surfaces with reduced space requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If two separate compound slide rests are used for simultaneous grinding of pin bearings, then grinding precision and control are improved, but device complexity and space requirements increase significantly
Solution Approach 1:
The patent combines two separate compound slide rests into a single common compound slide rest that supports both pin bearing grinding spindles. This merging reduces device complexity and space requirements while maintaining the ability to grind two pin bearings simultaneously with appropriate precision through the shared slide rest mechanism.
2Ease of operation
If discrete compound slide rests are used for each grinding spindle, then individual control and monitoring are improved, but space requirements and structural complexity increase
Solution Approach 1:
The patent merges two discrete compound slide rests into one common compound slide rest structure that accommodates both pin bearing grinding spindles. This consolidation reduces the overall space requirement and structural complexity while maintaining operational control through the integrated slide rest design.
3Manufacturing precision
If main bearings are ground in one station and pin bearings in another station, then grinding quality is maintained, but productivity decreases due to sequential processing
Solution Approach 1:
The patent combines the grinding of main bearings and pin bearings into a single integrated station with a common compound slide rest. This allows simultaneous grinding of multiple bearing surfaces on the same crankshaft in one clamping operation, eliminating the need for sequential processing between separate stations and thereby increasing productivity while maintaining grinding quality.
Solution Approach 2:
The patent enables continuous simultaneous grinding of main bearings and pin bearings in one operation without interruption or repositioning. The common compound slide rest allows both grinding spindles to operate concurrently on the same workpiece, maintaining continuous useful action and eliminating idle time associated with sequential processing.
4Productivity
If a profiled grinding wheel with inclined axis is used, then simultaneous grinding of end-side surfaces and bearings is enabled, but device complexity increases
Solution Approach 1:
The patent employs a profiled grinding wheel with an inclined rotational axis that can grind both end-side surfaces (such as flange surfaces) and cylindrical bearing surfaces simultaneously. This multi-functional grinding wheel eliminates the need for separate grinding operations or additional specialized equipment, thereby increasing productivity without proportionally increasing 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
This design reduces space and structural complexity, enables efficient simultaneous grinding of main bearings, pin bearings, and end-side surfaces with high precision, and simplifies control processes, eliminating waiting times and improving overall productivity.
Implementation Method 1
a profiled grinding wheel, the rotational axis of which is inclined relative to the Z axis of the workpiece; this grinding wheel is preferably arranged in the first station. Because all of the main bearings can be ground simultaneously in the first station
Data Source
AI summary
A grinding center for the simultaneous grinding of a plurality of main and rod bearings and/or central and end-side sections of crankshafts includes first and second stations. Two main bearing grinding spindles, of which the first is movable only in the Z-direction and the second only insignificantly movable in the X-direction, are mounted on a common rod bearing-compound slide. In the final phase of grinding, a correction of variations in size between the two processed rod bearings occurs via a separated drive of the second rod bearing-grinding spindle in accordance with a size or roundness correction. The variations are detected by measuring devices. An inclined profiled grinding wheel is provided for the grinding of the end sections.