Cylindrical Workpiece Perforation Without Probe Measurement
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Solution Overview
Problem
Existing methods for perforating cylindrical workpieces, such as honeycomb structures, require costly and time-consuming probe measurements for accurate hole positioning and depth, necessitating specialized knowledge and high facility costs.
Innovation Solution
A perforating apparatus with a cradle, stopper, and drill system that allows for precise hole formation without probe measurements, utilizing a detector and controller to ensure accurate depth and position based on contact with the workpiece, and a chuck with grippers for stable positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If probe measurement of machining center is used to determine hole position and depth, then manufacturing precision is improved, but facility cost and measurement time increase
Solution Approach 1:
The workpiece itself serves as the measurement reference through its geometric features (outer diameter, length, center line). The positioning mechanism uses the workpiece's own dimensions to automatically determine hole position and depth without external probing, making the workpiece self-sufficient for positioning purposes
Solution Approach 2:
The complex electronic probe measurement system is replaced with a simple mechanical positioning mechanism consisting of positioning blocks, V-shaped grooves, and stoppers. This mechanical system directly translates workpiece geometry into precise hole positioning without requiring sophisticated sensing or calculation systems
2Manufacturing precision
If multiple measurement points are measured repeatedly with probe, then manufacturing precision is improved, but productivity decreases
Solution Approach 1:
The positioning mechanism performs all necessary positioning calculations in advance through its mechanical design. The V-shaped groove and positioning blocks are pre-configured to automatically establish the correct hole position based on workpiece geometry, eliminating the need for repeated measurements during the perforation cycle
Solution Approach 2:
The measurement and calculation functions are extracted from the perforation process itself. The positioning mechanism separately establishes the hole position using workpiece geometry before the actual drilling begins, allowing the perforation operation to proceed without interruption for measurements
3Manufacturing precision
If specialized knowledge is required to create NC program, then manufacturing precision is improved, but ease of operation worsens
Solution Approach 1:
The complex NC programming is replaced with a simple, disposable mechanical positioning setup. The positioning blocks and V-shaped grooves are basic mechanical components that require no specialized programming knowledge to use, making the system accessible to operators without advanced training while maintaining precision through their geometric design
Data Source
AI summary
A perforating apparatus for a cylindrical workpiece, including: a cradle having a groove extending in one direction horizontally from one end to another end; a stopper provided at the one end of the groove; a drill disposed vertically above the groove and movable at least in vertical direction, having a drill bit that extends vertically; and a chuck having a pair of opposing grippers movable toward each other in a horizontal direction perpendicular to the direction in which the groove extends, and symmetrically with respect to a rotation axis of the drill bit, each of the grippers further having a pair of vertically symmetric inclined surfaces expanding upwards and downwards.