Cutting Blade Mounting Mechanism with Ejector Suction and Air Bearing Alignment
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Solution Overview
Problem
Conventional cutting blade mounting mechanisms require a separate negative pressure generation source and often result in misalignment between the cutting blade and spindle, reducing the number of workpieces that can be cut due to the need for treatments like roundness dressing.
Innovation Solution
A cutting blade mounting mechanism that uses an air supply unit to generate negative pressure for sucking and fixing the cutting blade, featuring a blade mount with a columnar boss section, flange section, and ejector type blade suction section, which includes air passages to control the interval between the cutting blade and spindle, eliminating the need for a separate suction source and facilitating alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a separate negative pressure generation source is used to suck and fix the cutting blade, then the cutting blade can be easily replaced in shorter time, but the device complexity increases due to additional components
Solution Approach 1:
The patent combines the negative pressure generation function with the existing air supply source by integrating a suction port and air passage into the blade mount structure. This merging eliminates the need for a separate vacuum pump while maintaining the rapid blade replacement capability, thus improving productivity without increasing device complexity
Solution Approach 2:
The air supply source is designed to serve dual purposes: supplying air for spindle operation and generating negative pressure for blade fixation. This multi-functionality allows the same component to perform multiple tasks, reducing the total number of components needed while enabling rapid blade replacement
2Ease of manufacture
If the inner diameter of the through-hole is made slightly larger than the outer diameter of the boss section to prevent abrasion, then the mounting means is protected, but misalignment between the cutting blade and spindle occurs
Solution Approach 1:
The patent introduces discharge ports in the boss section that release air between the cutting blade and spindle. This intermediary air pressure mechanism actively maintains the interval and alignment, compensating for the clearance gap created by the larger through-hole diameter, thus preventing misalignment while protecting from abrasion
Solution Approach 2:
The patent changes the physical state of air from static to dynamic by introducing controlled air flow through discharge ports. This parameter change creates an active pressure field that maintains precise spacing and alignment between the cutting blade and spindle, overcoming the alignment issues caused by the clearance design
3Manufacturing precision
If roundness dressing treatment is applied to abrade the outer periphery of the cutting blade for alignment, then the center of rotation can be aligned, but the number of workpieces that can be cut is reduced
Solution Approach 1:
The patent implements preliminary alignment through precise manufacturing of the boss section and through-hole with controlled clearance, eliminating the need for subsequent roundness dressing treatment. This preliminary action ensures proper alignment from the start, preserving the full cutting life of the blade and maximizing the number of workpieces that can be processed
Solution Approach 2:
The patent replaces the mechanical abrasion process (roundness dressing) with a pneumatic alignment system using air pressure from discharge ports. This substitution eliminates the need to remove material from the cutting blade for alignment, thereby preserving blade integrity and extending its usable life for more workpieces
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 easy alignment and secure fixation of the cutting blade without a separate negative pressure source, reducing the need for time-consuming alignment treatments and increasing the number of workpieces that can be processed.
Implementation Method 1
an ejector type blade suction section having a first air passage connecting a supply port supplied with air from the air supply unit and a discharge port discharging the air, and a second air passage connecting a suction port opening to a side of the support surface of the flange section and the first air passage, and the ejector type blade suction section sucking the cutting blade by a negative pressure applied from the suction port
Implementation Method 2
a plurality of discharge ports are formed in an outer peripheral face of the boss section, and an interval between an inner peripheral face of the annular base of the cutting blade into which the boss section is inserted, and the outer peripheral face of the boss section is controlled by the air discharged from the discharge ports
Implementation Method 3
an air bearing section rotatably supporting the spindle by air and discharging the air through a gap between the spindle housing and the spindle toward a side of the tip portion of the spindle may be provided inside the spindle housing
Data Source
AI summary
A cutting blade mounting mechanism includes: a blade mount mounted to a spindle; and an air supply unit supplying air to the blade mount. The blade mount includes: a columnar boss section inserted into a through-hole provided in an annular base of the cutting blade; a flange section projecting in a radial direction from a side of a base end of the boss section; and an ejector type blade suction section having a first air passage connecting a supply port supplied with air from the air supply unit and a discharge port discharging the air, and a second air passage connecting a suction port opening to a side of a support surface of the flange section and the first air passage. A plurality of the discharge ports are formed in an outer peripheral face of the boss section.