Machine Tool Deburring Control Using Z-Axis and Spindle Rotation
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Solution Overview
Problem
Existing machine tools face difficulties in avoiding interference between deburring tools and workpieces due to command errors when moving in three straight axes, leading to inefficiencies and potential damage during burr removal processes.
Innovation Solution
A machine tool configuration that controls the relative positional relationship between the spindle and tool post using a control unit to manage movement along a straight axis and rotation axis, determining cutting positions based on acquired values representing the hole's diameter and circumference, 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 is commanded to move in three straight axes (X, Y, Z) to remove burrs, then the tool can reach the periphery of the cross hole, 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 combined with spindle rotation. This dimensional change allows the deburring tool to follow the circular periphery of the cross hole by utilizing the rotational motion of the spindle, thereby eliminating interference caused by inaccurate positioning commands in the traditional three-axis system
Solution Approach 2:
The patent replaces the mechanical three-axis positioning system with a control system that utilizes the existing spindle rotation mechanism. Instead of commanding the tool to move precisely along three linear axes, the system commands movement along the spindle axis and utilizes spindle rotation to achieve circumferential deburring, substituting complex mechanical positioning with a simpler rotational mechanism
2Manufacturing precision
If a specialized tool is used for deburring, then burr removal is effective, but the machine tool requires specialized equipment and increased complexity
Solution Approach 1:
The patent enables general-purpose cutting tools to perform deburring functions by utilizing the combined motion of spindle axis movement and spindle rotation. This eliminates the need for specialized deburring tools and tool posts, allowing the same machine tool to perform both machining and deburring operations with standard tools, thereby reducing device complexity and tool inventory requirements
Data Source
AI summary
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.