Segmented Suction Plate Manufacturing for Self-Grinding Accuracy
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Solution Overview
Problem
The existing methods for manufacturing holding tables with a porous structure from the same material as the workpiece are complex and prone to suction pressure leaks during self-grinding, requiring frequent grinding wheel replacements and complicating the grinding process.
Innovation Solution
A holding table manufacturing method involving the formation of intersecting grooves on plate-shaped bodies, which are then united to create a suction plate with a thickness greater than the accommodating recess, allowing for efficient self-grinding without contact with the frame body and reducing the need for grinding wheel replacements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a suction plate with thickness greater than the accommodating recess depth is used, then self-grinding can be performed without frame body contact, but manufacturing complexity increases due to the need for intersecting grooves and multiple plate-shaped bodies
Solution Approach 1:
The suction plate is segmented into multiple plate-shaped bodies that are united together. This segmentation allows the creation of intersecting grooves that penetrate through the stacked plates, forming through-holes for suction passages while maintaining the overall thickness greater than the accommodating recess depth
Solution Approach 2:
Multiple plate-shaped bodies are stacked and nested together to form the suction plate. The intersecting grooves from adjacent plates align to create through-holes, enabling the suction function while maintaining structural integrity and appropriate thickness
2Manufacturing precision
If the suction plate thickness is increased to prevent frame contact during self-grinding, then grinding accuracy improves, but the formation of intersecting grooves becomes more difficult
Solution Approach 1:
By dividing the thick suction plate into multiple thinner plate-shaped bodies, the groove formation process becomes easier for each individual plate. The intersecting grooves are formed in separate plates that are then stacked, avoiding the difficulty of forming deep intersecting grooves in a single thick piece
Solution Approach 2:
The grooves are formed in each plate-shaped body before stacking. This preliminary formation of grooves in thinner plates is easier than forming intersecting grooves in a single thick plate, and the grooves align when plates are stacked to create the through-holes
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 method enables the easy and efficient manufacturing of holding tables capable of self-grinding, ensuring accurate grinding without frame contact and minimizing wheel exchanges, thus simplifying the grinding process.
Implementation Method 1
a suction source is connected to the other end side of the suction passage, a negative pressure acts on the workpiece through the suction passage and the porous member, and the workpiece is held under suction
Implementation Method 2
the grinding wheel is rotated to rotationally move the grindstones on an annular trajectory, and the grinding unit is lowered toward the holding table. As a result, bottom surfaces of the grindstones are brought into contact with a ground surface which is an upper surface of the workpiece, and the workpiece is ground
Data Source
AI summary
A holding table manufacturing method includes forming a plurality of first grooves in a front surface of a plate-shaped body, forming a plurality of second grooves in a back surface of the plate-shaped body, laying, on one another, a plurality of the plate-shaped bodies formed respectively with a plurality of the first grooves and a plurality of the second grooves and uniting the plate-shaped bodies together to form a suction plate, and accommodating the suction plate in an accommodating recess of a frame body to form a holding table. The first grooves and the second grooves do not reach side surfaces of the plate-shaped body, the first grooves and the second grooves communicate with each other, and the thickness of the suction plate is larger than the depth of the accommodating recess.