Edge Guide Alignment Structure for Precise CNC Workpiece Positioning
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Solution Overview
Problem
Existing edge guides for workpieces on worktables lack effective mechanisms to securely position and align workpieces during machining operations, particularly in CNC machining, where precise reference points are crucial for maintaining workpiece stability and orientation.
Innovation Solution
The edge guide features a guide body with transverse guide points of contact and an alignment feature that ensures the workpiece is securely held and aligned by abutting its edges, utilizing a guide contact ridge and additional contact ridges, along with through holes for fastening, and an optional inward relief step for machine tool clearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional edge guides are used to position workpieces, then the workpiece can be held on the worktable, but the workpiece cannot be securely positioned and aligned with precise reference points
Solution Approach 1:
The guide body is segmented into multiple functional contact features: guide points of contact for lateral positioning, additional guide points for secondary alignment, and an alignment feature with reference surface for precise edge alignment. This segmentation allows each feature to contribute specifically to overall positioning precision and stability.
Solution Approach 2:
Different regions of the guide body have specialized local properties: the guide points provide point contact for precise lateral positioning, the reference surface provides a flat alignment interface, and the relief step provides clearance. Each local feature is optimized for its specific function to achieve both precision and reliability.
2Measurement precision
If the edge guide is designed with comprehensive guide features for precise positioning, then alignment precision is improved, but the complexity of the guide structure increases
Solution Approach 1:
Multiple positioning and alignment functions are merged into a single integrated guide body structure. The guide points, additional guide points, and alignment feature are all part of one monolithic component that can be mounted in a single location, eliminating the need for multiple separate positioning devices.
Solution Approach 2:
The guide body serves multiple functions simultaneously: it provides lateral positioning through guide points, secondary alignment through additional guide points, and precise edge alignment through the reference surface. This multi-functionality reduces the number of separate components needed while maintaining positioning precision.
3Ease of operation
If the guide body is designed with relief step for machine tool clearance, then machine tool passage is enabled, but the overall height of the guide body increases
Solution Approach 1:
The guide body height is segmented into functional zones: the main body height required for positioning functionality, and a localized relief step that provides clearance only where the machine tool needs to pass. This segmentation allows clearance without increasing the overall height of the entire guide body.
Solution Approach 2:
The relief step creates a localized area of reduced height only in the specific region where machine tool passage is required, while the rest of the guide body maintains its full height and positioning features. This local modification provides clearance without compromising the overall structure or increasing total height.
Data Source
AI summary
An apparatus, including a guide body (100) having: a bottom surface (102) configured to rest flat atop a worktable; a guide side (200) including a guide contact feature with at least two guide points of contact (202A, 202B) that are configured to abut a flat side of a workpiece disposed on the worktable; and an alignment feature (400) that protrudes downward from the bottom surface. When the alignment feature aligns with a straight edge or a flat face of the worktable, worksurface distances (Da, Db) from the straight edge or from the flat face to each guide point of contact are the same. The apparatus further includes a through hole (500) that passes through a top surface (502) and through the bottom surface (102) and that is disposed between the guide contact feature and the alignment feature.