Plate Workpiece Cutting with Segmented Grooves and Acid Fluid
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Solution Overview
Problem
Existing methods for cutting plate-shaped workpieces with division lines and metal members face issues such as blade clogging, cracking, and burr generation, leading to reduced feed speed and workability due to the lack of self-sharpening tools and increased processing heat.
Innovation Solution
A two-step cutting method using a first cutting blade to form a groove and a second cutting blade to fully cut the workpiece, with a cutting fluid containing an organic acid and oxidizing agent applied during the first step to modify the metal's ductility and facilitate easier cutting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a cutting blade is used to cut the plate-shaped workpiece in one step, then the processing speed can be maintained, but the blade becomes clogged by metal members causing cracking or blade damage
Solution Approach 1:
The cutting process is divided into two sequential steps: first cutting to form a groove that divides the metal member, and second cutting to fully cut the workpiece along the first cut groove. This segmentation prevents the blade from encountering continuous metal members, eliminating clogging while maintaining processing speed and blade durability
2Productivity
If the feed speed is increased to improve productivity, then the processing efficiency increases, but the cutting load and processing heat increase causing more burrs and dragging
Solution Approach 1:
By dividing the cutting into two steps with reduced thickness per step, the processing heat and cutting load at each step are reduced, enabling higher feed speeds without increasing burr generation or dragging
Solution Approach 2:
The cutting depth parameter is changed by performing two passes instead of one, reducing the thickness to be cut in each step. This parameter change allows higher feed speeds while maintaining cutting quality by reducing processing heat and load
3Reliability
If a carbide-tipped saw blade is used instead of a cutting blade to prevent clogging, then blade durability improves, but the saw blade has no self-sharpening function causing sharpness to deteriorate quickly
Solution Approach 1:
The two-step cutting method allows the use of cutting blades that can self-sharpen, as each blade only needs to cut through reduced thickness. This maintains workability while the segmented approach prevents clogging, achieving both durability and productivity
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 increases feed speed by reducing the thickness of the workpiece in each cutting step and suppresses burr generation, improving workability by modifying the metal's properties and allowing for higher feed rates without degrading processing quality.
Implementation Method 1
supplying a cutting fluid containing an organic acid and an oxidizing agent to the plate-shaped workpiece
Implementation Method 2
the metal present on the workpiece is modified by the organic acid contained in the cutting fluid
Implementation Method 3
cutting the plate-shaped workpiece along the division line by using a first cutting blade
Data Source
AI summary
A method for processing a plate-shaped workpiece having a division line and a metal member formed on the division line or in an area corresponding to the division line includes a holding step of holding the plate-shaped workpiece on a chuck table where the metal member is exposed, a first cutting step of cutting the plate-shaped workpiece along the division line by using a first cutting blade after performing the holding step, thereby forming a first cut groove dividing the metal member, and a second cutting step of cutting the plate-shaped workpiece along the first cut groove by using a second cutting blade after performing the first cutting step, thereby forming a second cut groove fully cutting the plate-shaped workpiece. The first cutting step includes the step of supplying a cutting fluid containing an organic acid and an oxidizing agent to the plate-shaped workpiece.