Torque-Based Clamp Instruction for CNC Addition Axis
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Solution Overview
Problem
Conventional clamp instruction methods for workpieces result in inefficiencies due to unnecessary clamp and unclamp states during machining operations, leading to wasted time and reduced overall working efficiency.
Innovation Solution
A method that measures rotational torque during machining and generates clamp instructions only when the torque exceeds a predetermined reference value, with pre-determined clamp instructions for load tools to avoid unnecessary clamp and unclamp operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If clamp instruction is generated before every working operation, then the addition axis is securely clamped, but working efficiency decreases due to unnecessary clamp and unclamp operations
Solution Approach 1:
The system changes the parameter of clamp instruction timing from fixed (before every operation) to variable (based on measured rotational torque values). By monitoring torque parameters and comparing against thresholds, the system dynamically adjusts when clamping is necessary, eliminating unnecessary clamp/unclamp cycles while maintaining security when needed.
Solution Approach 2:
The machining system performs self-monitoring of rotational torque during operations and autonomously determines when clamp instructions are necessary. The system serves itself by measuring its own operational parameters and making real-time decisions about clamping requirements without external intervention.
2Productivity
If clamp instruction is omitted to improve working efficiency, then time is saved, but the addition axis may slip under high torque conditions
Solution Approach 1:
The system implements feedback control by measuring rotational torque during machining operations and using this information to determine whether clamp instructions are necessary. The measured torque values feed back to the control system, which then decides on appropriate clamping actions, ensuring security is maintained when torque exceeds thresholds while allowing efficiency improvements when torque remains low.
3Productivity
If rotational torque is measured and monitored, then unnecessary clamp operations are eliminated, but system complexity increases
Solution Approach 1:
The system replaces complex mechanical clamping control with a measurement-based control approach. Instead of using purely mechanical timing mechanisms or complex control logic, the system uses rotational torque measurement to drive clamping decisions, substituting mechanical complexity with sensor-based feedback control.
Data Source
AI summary
A clamp of less waste instruction method for an addition axis, which omits instructions for clamping and unclamping and working in response to those instructions, includes the steps of, at a stage of working a work piece with a tool, measuring a rotational torque generated by the working with respect to the addition axis coupled to a table which supports the work piece or a pallet having the work piece mounted thereon; and generating a clamp instruction to the addition axis when the rotational torque exceeds a predetermined reference value.