Adjustable Bevel Gear Tool Head with Tilted Slots
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Solution Overview
Problem
Existing tool heads for cutting bevel gears face challenges in making fine adjustments to tooth surfaces, leading to increased manufacturing costs due to the need for regrinding blades and potential loosening of blades under cutting load, which affects cutting precision.
Innovation Solution
A tool head with tilted installation holes and reference surfaces that allow blades to protrude a discretionary amount, preventing loosening by directing the cutting load to the main head body and reducing the need for extensive grinding on the opposite side of the blades.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If blades are attached perpendicular to the main body of the head, then it is possible to cut tooth surfaces, but it causes interference between the blade and the tooth surface, requiring additional grinding on the opposite side of the blade which increases production cost
Solution Approach 1:
The blade is designed with asymmetric geometry where the cutting edge is positioned at an angle relative to the blade axis, specifically with the cutting portion extending only on one side. This asymmetric configuration allows the blade to cut tooth surfaces effectively while avoiding interference with the opposite tooth surface, eliminating the need for additional grinding on the blade's opposite side and reducing production costs
2Ease of operation
If blades are fastened by tightening bolt members from the outer surface, then it is simple to assemble, but the blades become loose under cutting load, decreasing cutting precision
Solution Approach 1:
Instead of fastening the blade from the outer surface toward the inner side (conventional method), the invention inverts the fastening direction by securing the blade from the inner side toward the outer side. The bolt member passes through the main body and fastens the blade's rear surface, creating a configuration where the cutting load pushes the blade tighter against the seating surface rather than loosening it, thereby maintaining cutting precision while keeping assembly relatively simple
3Ease of manufacture
If the installation radius of blades is fixed, then the blade structure is simple, but it is not possible to easily correct tooth surface shapes, requiring regrinding of blades which increases manufacturing cost
Solution Approach 1:
The blade installation structure is designed to be dynamically adjustable rather than fixed. The blade can be positioned at different radial distances from the rotation axis by adjusting its installation position on the main body, and the protruding amount of the blade can be varied. This dynamic adjustability allows easy correction of tooth surface shapes without requiring regrinding of blades, reducing manufacturing costs while maintaining reasonable structural complexity
Data Source
AI summary
A tool head is provided that can easily correct the shape of a tooth surface. Slot holes are formed in a main head body, that tilt either distally or proximately to the central axis of rotation (CAR) of the main head body. Concave tooth surface blades for cutting concave tooth surfaces are installed in the slot holes that tilt distally, and convex tooth surface blades for cutting convex tooth surfaces are formed in the slot holes that tilt proximately. By changing the amount that the concave or convex tooth surface blades protrude, the cutting portions of the concave or convex tooth surface blades are moved in either distal or proximate directions. By changing the distance from the CAR to the cutting portions in this manner, it is possible to correct the shape of the concave or convex tooth surfaces of a bevel gear.