Boring Head Scale Geometry for Parallax-Free Tool Positioning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing boring heads obstruct the view of graduation marks, making it difficult to achieve precise positioning due to parallax errors when the boring head is mounted in a machine.
Innovation Solution
The design incorporates a convexly rounded bevel surface with an arc-shaped edge on the scale surface, allowing for a perpendicular view of graduation marks, eliminating parallax errors and enhancing readability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the scale surface is made flat and perpendicular to the micrometer screw axis, then the structure is simple and easy to manufacture, but the view of graduation marks is obstructed causing parallax errors
Solution Approach 1:
The scale surface is designed with a convexly rounded bevel surface geometry instead of a flat surface. This curvature allows the graduation marks to be viewed perpendicularly from the side of the boring head, eliminating parallax errors while maintaining manufacturing feasibility through standard machining operations.
2Measurement precision
If the operator looks along the axis of the micrometer screw to read the scales, then the reading is accurate without parallax error, but the view is blocked when the boring head is mounted in a machine
Solution Approach 1:
The scale surface is tilted at an angle relative to the micrometer screw axis, transferring the reading function from the axial dimension to a radial/dimensional direction. This allows the operator to view the graduation marks perpendicularly from the side of the boring head, making the scales accessible without requiring line-of-sight along the screw axis.
3Ease of operation
If the scale surface is tilted to enable side viewing, then the accessibility is improved, but the alignment of graduation marks may become inaccurate
Solution Approach 1:
The convexly rounded bevel surface creates an arc-shaped edge that naturally aligns the first graduation marks on the micrometer screw head with the second graduation marks on the main body scale. This geometric configuration ensures that when viewed perpendicularly from the side, the marks line up accurately without parallax error, maintaining measurement precision while improving accessibility.
Data Source
AI summary
A boring head arranged for holding a boring tool for metal cutting includes a main body having a support surface and a scale surface. The boring head further includes a piston including a boring tool interface for fixedly carrying the boring tool. The piston is movably arranged in the main body along the positioning axis (y), and a micrometer screw. The micrometer screw is arranged in the main body and coupled to the piston, such that, when the micrometer screw is rotated, the piston is moved along the positioning axis to one of the protracted positions or the retracted position. The micrometer screw has a head abutting against the support surface. The head includes a radially outer head surface provided with first graduation marks. The scale surface is provided with second graduation marks aligned with the first graduation marks to provide a reading of the axial position of the piston.