Cutting Apparatus Suction Force Verification
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Solution Overview
Problem
The existing cutting apparatuses risk damaging wafers and cutting blades due to foreign matter interference and insufficient suction force, leading to potential damage during the cutting process.
Innovation Solution
A cutting apparatus with a pressure gauge in the communication passage between the suction hole and suction source, which checks for foreign matter clogging and inhibits rotation if the suction force is inadequate, ensuring proper blade holding and preventing damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If foreign matter is interposed between the mount and the cutting blade, then the suction force becomes insufficient, but the cutting process can still be initiated without detection, leading to damage
Solution Approach 1:
The system performs preliminary suction force verification by measuring pressure in the communication passage before allowing the cutting blade to rotate. This preliminary action detects foreign matter interference in advance, preventing damage by inhibiting rotation when suction force is insufficient.
Solution Approach 2:
The pressure gauge provides real-time feedback on suction force by measuring pressure in the communication passage. The control unit receives this feedback and automatically inhibits rotation when the pressure indicates insufficient suction force, creating a closed-loop control system that prevents damage.
2Measurement precision
If the suction hole is clogged with foreign matter, then the cutting blade cannot be held sufficiently, but the suction pressure reading may still appear appropriate, leading to undetected damage risk
Solution Approach 1:
The pressure gauge acts as an intermediary measurement device that indirectly assesses suction force by measuring pressure in the communication passage. This intermediary measurement provides more accurate detection of suction force conditions than direct pressure measurement at the suction hole, enabling reliable detection of clogging conditions.
3Productivity
If the cutting blade rotates with insufficient suction force, then damage occurs, but no active detection mechanism exists to prevent this
Solution Approach 1:
The control unit applies preliminary anti-action by automatically inhibiting rotation of the cutting blade when the pressure gauge indicates insufficient suction force. This preventive measure counteracts the potential harmful action of rotating with inadequate holding force, eliminating damage risk while maintaining operational continuity through automatic protection.
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 apparatus effectively suppresses the risk of wafer and cutting blade damage by detecting foreign matter and ensuring a sufficient suction force before starting the cutting process, thereby maintaining the integrity of both components.
Implementation Method 1
a suction hole that is opened between the boss section and the support section and that suction holds the cutting blade
Implementation Method 2
a pressure gauge is disposed in the communication passage, a control unit is connected to the pressure gauge
Data Source
AI summary
A control unit of a cutting apparatus has a suction checking function of determining that foreign matter is clogged in a suction hole and issuing an instruction on removal of the foreign matter in a case where the value of a pressure gauge before mounting of a cutting blade onto a mount is less than a first predetermined value, and a mounting checking function of inhibiting start of rotation of a rotary shaft in a case where the value of the pressure gauge after mounting of the cutting blade onto the mount does not reach a second predetermined value smaller than the first predetermined value and permitting the start of rotation of the rotary shaft in a case where the value of the pressure gauge after mounting of the cutting blade onto the mount has reached the second predetermined value.