Rail Grinding Device with Rotating Stone for Grooved Rail Profile
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Solution Overview
Problem
Existing railhead surface grinding technologies are limited in their ability to consistently grind welded, abraded, or damaged rail parts, particularly on grooved rails, as they fail to maintain the original curved transverse cross-sectional profile and rely heavily on operator skill, making precise grinding difficult and inconvenient.
Innovation Solution
A railhead surface grinding device with a frame that includes a horizontal movement frame, a lifting part, and a rotation driving part, allowing the grinding stone to incline and follow the curved shape of the railhead surface, coupled with a magnetic base for stable attachment and a displacement sensor for precise control, enabling efficient grinding on both standard and grooved rails.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a grinding stone only moves up and down perpendicularly in vertical direction, then the grinding device structure is simple, but the grinded surface cannot have the same transverse cross-sectional profile as the original rail surface
Solution Approach 1:
The grinding stone is made rotatable about a transverse axis in addition to vertical movement, allowing dynamic adjustment of the grinding surface angle to match the curved transverse profile of the rail. This dynamic capability enables the grinding stone to adapt to different rail geometries while maintaining manufacturing precision.
Solution Approach 2:
The grinding stone motion is extended from one dimension (vertical only) to two dimensions (vertical movement plus rotation about transverse axis). This additional degree of freedom allows the grinding stone to conform to the curved transverse cross-sectional profile while the control system manages the increased complexity.
2Manufacturing precision
If a grinding device is installed on a car or train traveling along the rail, then the device has high mobility, but precise grinding is difficult because it relies on operator skill or naked eye observation
Solution Approach 1:
A sensor is positioned to detect the geometry of the rail head surface in real-time during grinding operations. This feedback mechanism allows the control system to monitor the grinding process and adjust parameters automatically, eliminating reliance on operator skill and naked eye observation for achieving precise grinding results.
Solution Approach 2:
The manual operation and visual inspection by operators are replaced with an automated sensor-based detection and control system. The sensor objectively measures rail surface geometry and feeds this data to the control system, substituting human judgment with precise instrumental measurement and automated control.
3Adaptability or versatility
If conventional grinding devices are used on grooved rails, then the device structure is simple, but the device is unsuitable for use in grooved rails
Solution Approach 1:
The grinding device is designed with a rotatable grinding stone mechanism that can adapt to different rail types including both conventional and grooved rails. The same basic structure with adjustable orientation capabilities serves multiple rail configurations, making the device universal without requiring completely different designs for grooved versus conventional rails.
Solution Approach 2:
The grinding stone's orientation parameters (rotation angle about transverse axis) are adjusted to accommodate the specific geometry of grooved rails. By changing the angular parameter of the grinding stone orientation, the same device structure can effectively grind different rail types without structural modification.
Data Source
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AI summary
The present invention relates to: a railhead surface grinding device, which can be transferred and used by an operator, can grind a railhead surface while inclining a grinding stone thereof according to a curved shape of the rail, can perform grinding while measuring a grinded degree of a railhead surface, and can be also applied to a grooved rail; and a railhead surface grinding method using the same.