Automated Belt Grinding for Welded Member Smoothing
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Solution Overview
Problem
The existing methods for smoothing welded areas, particularly in vehicle door frames, rely on manual labor and lack automation, making it difficult to achieve a smooth surface within a predetermined time frame.
Innovation Solution
A method and apparatus utilizing a belt grinding apparatus with an endless grinding belt and a press pad to automate the smoothing process, where the belt is used in two modes: one for reducing the weld bead height and another for smoothing the surface, with controlled grinding conditions to ensure efficient operation within a fixed time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual labor is used to remove weld beads and smooth surfaces, then flexibility and adaptability are maintained, but productivity is low and the process cannot be completed within predetermined takt time
Solution Approach 1:
The system uses its own grinding belt and press pad to automatically remove weld beads and smooth surfaces without external intervention. The grinding belt self-adjusts through the press pad mechanism to maintain contact with the workpiece surface, enabling autonomous operation within takt time
Solution Approach 2:
Manual mechanical operations are replaced with an automated belt grinding system that uses a moving grinding belt driven by a motor, controlled by a control unit to perform weld bead removal and surface smoothing operations automatically
2Manufacturing precision
If a fixed grinding position is used to remove weld beads, then manufacturing precision is maintained, but the grinding belt cannot smooth the entire welded area effectively
Solution Approach 1:
The grinding belt transitions from a fixed position during weld bead removal to a movable position during surface smoothing. The press pad mechanism dynamically adjusts the belt's contact position and pressure to adapt to different grinding requirements while maintaining precision
Solution Approach 2:
The grinding process is divided into two distinct phases: first, fixed-position grinding to remove weld beads with high precision, then movable grinding to smooth the entire welded area. This segmentation allows each phase to optimize for its specific function
3Productivity
If the grinding belt is pressed hard against the welded area, then weld bead removal efficiency increases, but the grinding belt wears faster and surface quality may deteriorate
Solution Approach 1:
The press pad dynamically adjusts pressing force based on the grinding phase. During weld bead removal, higher force is applied to increase efficiency. During surface smoothing, the force is reduced to prevent excessive material removal and maintain surface quality, while the movable belt position ensures comprehensive coverage
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
Enables automated and efficient smoothing of welded areas, reducing the time required for the process and facilitating consistent takt times, thereby improving the automation and quality of surface smoothing.
Implementation Method 1
a belt grinding apparatus, which includes an endless grinding belt and a press pad that presses the grinding belt against the welded area
Data Source
AI summary
A smoothing method and a smoothing apparatus has been achieved, which make it possible to automate smoothing of welded members that was formerly carried out manually.The method according to the present invention uses a belt grinding apparatus, which includes an endless grinding belt and a press pad that presses the grinding belt against a welded area, and uses this belt grinding apparatus in two different modes after obtaining information on heights of surfaces of two welded members along a weld bead of the two welded members. The first mode corresponds to a bead removing step in which the grinding belt is pressed against a welded area by the press pad to reduce the height of the weld bead. At this time, the grinding belt is made to run at a fixed position, while the press pad is made to move toward and away from the welded area (the surface thereof). The next mode corresponds to a smoothing step in which the grinding belt is made to run and pressed against the welded area by the press pad while being made to move along the surfaces of the two welded members to smooth the welded area.