Cross-Hole Deburring Control With Up-Cut and Down-Cut Tool Paths
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Solution Overview
Problem
Existing machine tools face challenges in creating machining programs for down-cutting or up-cutting to effectively remove burrs around cross holes, particularly due to the complexity of controlling relative cutting positions in multiple axes.
Innovation Solution
A machine tool with a spindle, tool post, and control unit that allows for the attachment of a deburring tool to rotate around a deburring tool center axis, enabling control of relative positional relationships to perform either down-cutting or up-cutting along the periphery of a hole, maintaining the instructed cutting direction and orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a specialized tool is used to remove burrs from cross holes, then burr removal capability is improved, but device complexity increases and requires specialized tool attachment
Solution Approach 1:
The deburring tool is designed to perform multiple functions: it can remove burrs from cross holes and also perform chamfering operations. The same tool with a ball-shaped cutting portion handles both deburring and chamfering, eliminating the need for separate specialized tools for each operation.
Solution Approach 2:
The invention uses a ball-shaped cutting portion that can replicate effective deburring and chamfering actions through controlled movement. The spherical geometry allows the tool to copy successful deburring patterns from various angles and positions, achieving consistent results without complex specialized tooling.
2Object-generated harmful factors
If down-cutting or up-cutting is used for deburring, then cutting effectiveness is improved, but programming complexity increases for operators
Solution Approach 1:
The control unit automatically determines and executes the appropriate cutting mode (down-cutting or up-cutting) based on the machining parameters and tool position. The system self-manages the complex programming decisions about cutting direction and tool movement, eliminating the need for operators to manually program these complex sequences.
Solution Approach 2:
The control unit monitors tool position, cutting depth, and machining parameters in real-time, automatically adjusting the cutting mode between down-cutting and up-cutting as needed. This feedback mechanism allows the system to adaptively select the most effective cutting approach without requiring pre-programmed complex sequences by operators.
3Device complexity
If general-purpose tools are used instead of specialized tools, then device complexity is reduced, but cutting precision for maintaining instructed cut may worsen
Solution Approach 1:
The deburring tool employs dynamic control of the ball-shaped cutting portion through the control unit, which adjusts tool position, rotation speed, and movement trajectory in real-time. This dynamic control compensates for the simplicity of the general-purpose tool geometry, maintaining high cutting precision for both deburring and chamfering operations.
Solution Approach 2:
The control unit precisely manages cutting parameters including tool rotation speed, feed rate, depth of cut, and tool position coordinates. By dynamically adjusting these parameters, the system achieves high manufacturing precision with a general-purpose ball-shaped tool, matching or exceeding the performance of specialized tools.
Data Source
AI summary
To provide a machine tool that improves convenience when removing burrs.A deburring tool that cuts a periphery of a hole in an orientation intersecting a spindle axis in a workpiece is attached to a tool post of a machine tool and the tool post rotates the deburring tool around a deburring tool center axis. A control unit of the machine tool acquires a command (CM1 to CM4) for instructing the deburring tool to either perform, on the periphery, down-cutting in which a cutting direction by the rotating deburring tool is opposite to a relative movement direction of the deburring tool or to perform, on the periphery, up-cutting in which the cutting direction and the relative movement direction are the same, and performs control to cut the periphery so as to maintain the cut instructed by the command (CM1 to CM4) at a cutting position.