Optimizing Cutting Tool Conditions via Continuous Parameter Variation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing method for determining optimal working conditions of cutting tools, as defined by standard NF E66-520, requires numerous tests and instrumentation of machines, which is time-consuming and costly, and not suitable for workshop environments.
Innovation Solution
A method using a numerically controlled machine with a motorized spindle to continuously vary cutting speed and feed rate during a single machining pass, recording torque current data to calculate specific cutting energy, thereby determining optimal operating ranges without the need for additional instrumentation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If numerous tests are performed according to standard NF E66-520 to determine optimal working conditions, then statistical value of results is improved, but time consumption and cost increase significantly
Solution Approach 1:
The patent applies preliminary action by using the motorized spindle's existing capability to vary cutting speed and feed rate before the actual optimization tests. The numerical control program pre-configures the variable parameters and their ranges, so that when tests are conducted, the data collection is already structured and ready, eliminating the need for post-test data organization and reducing overall test time while maintaining statistical validity
Solution Approach 2:
The patent implements continuity of useful action by using the motorized spindle's automatic variation of cutting speed and feed rate during a single continuous machining pass. This continuous variation eliminates the need to stop and restart for different parameter combinations, allowing uninterrupted data collection across the entire parameter range, thus reducing time loss while maintaining comprehensive test coverage for statistical validity
2Measurement precision
If instrumentation is added to the machine and tool for testing, then measurement capability is improved, but device complexity and investment cost increase
Solution Approach 1:
The patent applies self-service by utilizing the motorized spindle's built-in capability to automatically vary cutting speed and feed rate, and its integrated torque current measurement function. The spindle serves itself by providing both the parameter variation and the measurement data without requiring external instrumentation, thereby maintaining measurement capability while avoiding additional device complexity and investment costs
Solution Approach 2:
The patent uses the numerical control system as an intermediary that coordinates the motorized spindle's parameter variations and collects the torque current data. The numerical control acts as a mediator between the spindle's capabilities and the optimization process, eliminating the need for separate instrumentation while maintaining full measurement capability through software-based data acquisition and processing
3Reliability
If dedicated testing equipment is constructed in a protected space, then measurement reliability is improved, but investment cost and loss of substance increase
Solution Approach 1:
The patent applies universality by enabling the production machine's motorized spindle to perform both its primary production function and the optimization measurement function. The same spindle that manufactures parts also conducts the optimization tests by varying parameters and measuring torque current, eliminating the need for dedicated testing equipment and thereby reducing investment costs while maintaining measurement reliability through the spindle's inherent capabilities
Solution Approach 2:
The patent merges the optimization measurement function with the production machine's existing motorized spindle system. By combining the parameter variation capability and torque measurement function that already exist in the production spindle with the optimization test protocol, the patent eliminates the need for separate dedicated testing equipment, reducing investment costs while maintaining measurement reliability through the integrated system
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach significantly reduces the time and cost associated with testing, allowing direct optimization of machining operations on production machines and enabling efficient series production without dedicated testing equipment.
Implementation Method 1
the data recorded are constituted during this single pass, by the various values taken by the torque current (Iq) of the motor of the spindle of the machine
Data Source
Figure 1
Figure 2~3
AI summary
The invention relates to a method for acquiring the optimized parameters of a machining operation in the application of COM methodology, comprising: providing a plurality of readings indicative of the specific cutting energy (Kc) during an equal plurality of tests carried out with an imposed value, that is different from one test to another by at least one variable representative of the cutting operations, one of said variables being the cutting speed (Vc) and another being the advance rate (f); next determining a range of values of each of said variables including the optimal value for said variable obtained by means of processing the results for carrying out the machining operation; characterized in that a specific program (10a) of the digital control (7) is used for obtaining a continuous variation of the values of the variable during a single machining pass for a test, and in that the data read are formed during said single pass by the different values of the torque current (Iq) of the motor of the machine pin from which the corresponding values of (Kc) are derived by means of computational processing.