Compact Grinding Device for Calendering Cylinder Surface Correction
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Solution Overview
Problem
Existing corrective grinding devices for cylinders in calendering installations are heavy, bulky, and require extensive handling and adjustment, leading to long downtime and potential surface defects due to their design, which complicates transportation and precision grinding.
Innovation Solution
A compact and lightweight corrective grinding device with a machining head where the belt-driving motor's stator is integrated within the axial space occupied by the abrasive belt, allowing for a longer useful feed stroke without hindering movement and enabling easy transportation and precise surface grinding without dismantling the cylinder.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If transportable corrective grinding machines are used to work on cylinders in place, then handling operations are reduced, but the machines remain heavy and bulky making transportation complex and costly
Solution Approach 1:
The machine is divided into modular components: a base unit and separate machining heads that can be independently transported and assembled. This segmentation reduces the weight and complexity of individual transport units while maintaining operational capability when assembled at the work location.
Solution Approach 2:
The motor is repositioned from a conventional lateral location to an axial position along the cylinder axis, and the abrasive belt is arranged radially. This dimensional reconfiguration allows the motor to be integrated within the cylindrical space, eliminating the need for long base lengths and reducing overall machine footprint and weight.
2Length of moving object
If the base is made very long to ensure sufficient axial travel of the machining head, then the entire length of the surface to be ground can be covered, but the base becomes more subject to bending degrading surface quality and precision
Solution Approach 1:
The motor is repositioned from a conventional lateral location to an axial position along the cylinder axis, and the abrasive belt is arranged radially. This dimensional reconfiguration allows the motor to be integrated within the cylindrical space, eliminating the need for long base lengths and reducing overall machine footprint and weight.
Solution Approach 2:
The conventional mechanical drive system with lateral motor placement is replaced by a radial drive system where the motor rotates the abrasive belt in a plane perpendicular to the cylinder axis. This substitution eliminates the need for long base structures and reduces bending issues.
3Length of moving object
If multiple machining heads are used to grind the cylinder in successive sections, then the surface can be ground without requiring a very long base, but ridge-type surface defects are formed at the transition between sections requiring further re-working
Solution Approach 1:
The machine is divided into modular components: a base unit and separate machining heads that can be independently transported and assembled. This segmentation reduces the weight and complexity of individual transport units while maintaining operational capability when assembled at the work location.
Solution Approach 2:
The single continuous abrasive belt system ensures uninterrupted material removal across the entire cylinder surface, eliminating the start-stop effects and surface defects that occur with multiple discrete machining heads working in succession.
4Power
If the motor is located offset from the abrasive belt in the direction of axial length, then the motor can drive the abrasive belt, but the base must be very long or multiple heads must be used
Solution Approach 1:
The motor is repositioned from a conventional lateral location to an axial position along the cylinder axis, and the abrasive belt is arranged radially. This dimensional reconfiguration allows the motor to be integrated within the cylindrical space, eliminating the need for long base lengths and reducing overall machine footprint and weight.
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
The device achieves rapid and precise surface grinding with reduced downtime, improved transportability, and minimized risk of surface defects, allowing for efficient maintenance of calendering installations with minimal disruption and increased operational efficiency.
Implementation Method 1
corrective grinding devices intended to machine, by abrasion, the surface of parts of revolution
Data Source
AI summary
A corrective grinding device for machining a surface to be ground (2A) of a part of revolution (2) with a main central axis (X2), comprises a base (5) to be fixed on the frame (3), a machining head (10) comprising an abrasive belt (11) which is guided along a belt path (12) so as to be pressed against the surface to be ground (2A) in a first penetration direction (Y10), a belt-driving motor (16) arranged to drive the abrasive belt (11) in motion along the belt path (12), a head movement system (23) for moving the machining head (10) on the base (5) in a second feed direction (X10) along the main central axis (X2). In orthogonal projection in a base plane (P10) defined by the feed direction (X10) and the penetration direction (Y10), the projected surface of the abrasive belt (11) overlaps the projected surface of the stator (17) of the belt-driving motor (16).