Spindle-Axis Deburring Control for Cross-Hole Interference Avoidance
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Solution Overview
Problem
Existing machine tools face challenges in avoiding interference between deburring tools and workpieces due to command errors when moving in three straight axes, particularly when removing burrs from the periphery of cross holes.
Innovation Solution
A machine tool configuration that controls the relative positional relationship between the spindle and the tool post on a straight axis and rotation axis, using acquired values to determine a cutting position that changes along the periphery, allowing the deburring tool to move in two axes instead of three, thereby avoiding interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the deburring tool moves in three straight axes (X, Y, Z) to remove burrs from the periphery of cross holes, then the tool can access the workpiece, but interference between the tool and workpiece occurs due to command errors
Solution Approach 1:
The patent transforms the control system from three straight-axis control (X, Y, Z) to control along the spindle axis direction and rotation axis direction. This dimensional change allows the deburring tool to follow the circular periphery of cross holes more accurately by utilizing rotational motion, thereby preventing interference between the tool and workpiece that occurs with traditional three-axis linear control
2Manufacturing precision
If a specialized tool is used to remove burrs from cross holes, then deburring can be performed, but the machining process becomes complex and time-consuming
Solution Approach 1:
The patent enables general-purpose end mills to perform deburring operations that previously required specialized tools. By controlling the tool along the spindle axis and rotation axis, standard end mills can effectively remove burrs from cross holes, eliminating the need for specialized deburring tools and reducing tool change time and setup complexity
Data Source
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AI summary
To provide a configuration that can easily avoid interference between a deburring tool and a workpiece due to command errors and the like when commanding the deburring tool to move in directions of three straight axes with respect to the workpiece. A control unit of a machine tool: acquires a value (CD) representing a diameter corresponding to a periphery when a hole is viewed from a direction of a machining center axis (X-axis direction) and a value (OD) representing a diameter corresponding to a circumference passing through the periphery around a spindle axis on a cross section perpendicular to the spindle axis; determines a straight axis coordinate corresponding to a cutting position that changes along the periphery on a straight axis (Z-axis) and a rotation angle corresponding to the cutting position on a rotation axis (C-axis) based on the value (CD) and the value (OD); and controls a relative positional relationship in the direction of the spindle axis (Z-axis direction) to the straight axis coordinate and controls rotation of a spindle to the rotation angle so that the cutting position changes along the periphery.