Dual-Axis Grinding Machine for Individual Cam Precision
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Solution Overview
Problem
Existing grinding machines are optimized for machining complete camshafts, making them inefficient for grinding individual cams, which require more precise and flexible operations, leading to increased non-productive times and higher costs.
Innovation Solution
A grinding machine design with two workholding devices and grinding wheel holders oriented in opposite directions, allowing for simultaneous machining of multiple cams with smaller grinding wheels, reducing space requirements and enabling continuous operation by minimizing non-productive times through efficient wheel movement and automatic clamping systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If grinding machines are designed for machining complete camshafts, then productivity for camshaft machining is improved, but adaptability for grinding individual cams deteriorates
Solution Approach 1:
The invention divides the workholding system into separate workholding devices, each capable of independently holding and positioning individual work fixtures with single cams. This segmentation allows the grinding machine to process individual cams separately while maintaining the productivity benefits of systematic machining operations.
Solution Approach 2:
The grinding machine is designed with universal workholding devices that can accommodate both complete camshafts and individual cams through interchangeable work fixtures. The workheadstock and steady rest configuration provides multi-functionality, enabling the same machine to perform different grinding operations on different workpiece types.
2Stability of the object's composition
If traditional workholding devices with tailstocks are used, then stability for long camshafts is improved, but space requirements and device complexity increase
Solution Approach 1:
The invention extracts the essential support function from the traditional tailstock and implements it through a simplified steady rest that contacts only the free end of the workpiece. This extraction maintains the necessary stability for preventing workpiece deflection during grinding while eliminating the complex tailstock structure, thereby reducing device complexity.
Solution Approach 2:
Instead of using a full tailstock along the entire length of the workpiece, the steady rest provides localized support only at the free end where it is needed. This local quality approach maintains stability where required while minimizing the overall device complexity and space requirements.
3Productivity
If large grinding wheels are used for camshaft machining, then productivity is improved, but flexibility for individual cam grinding deteriorates
Solution Approach 1:
The grinding wheel holder is designed to be movable along the grinding spindle axis, allowing dynamic adjustment of the grinding wheel position. This dynamics capability enables the same grinding wheel to effectively machine both large camshafts and small individual cams by adjusting its position, thereby maintaining both productivity and flexibility.
Solution Approach 2:
The invention allows for parameter changes in the grinding wheel position along the spindle axis. By adjusting the position parameter of the grinding wheel relative to the workpiece, the system can adapt to different workpiece sizes and types, maintaining productivity across different grinding operations.
4Manufacturing precision
If individual cams are ground separately, then manufacturing precision is improved, but non-productive times increase
Solution Approach 1:
The work fixtures are pre-configured with precise positioning features and the workholding devices are prepared in advance to quickly accept and position individual cams. This preliminary action ensures that when individual cams are to be ground, they can be rapidly loaded and positioned with the required precision, minimizing the non-productive setup and positioning time.
Data Source
AI summary
Grinding machine for grinding workpieces, in particular cams, a grinding machine holder and a method for grinding cam sets using such a grinding machine. Grinding machine comprising a machine bed, at least one grinding spindle, two grinding wheel holders, on which in each case at least one grinding wheel is arranged and which are arranged in opposite directions to one another in their orientation and are oriented parallel to one another with their longitudinal axes, and two workholding devices which in each case have a work headstock and a steady rest and which are arranged in opposite directions to one another in their orientation and are oriented parallel to one another with their longitudinal axes, wherein each work headstock and the associated steady rest are designed for the arrangement therebetween of a separate work fixture having workpieces to be ground.