Machining constant-cutting-force efficient machining technology

Abstract

The invention discloses a machining constant-cutting-force efficient machining technology, and relates to the field of machining technologies, and the machining constant-cutting-force efficient machining technology comprises the steps that tool information, workpiece information and an NC file are input, and all discrete points of a tool path are planned; according to the tool path discrete points, the current tool location point is read; obtaining a contact body CWE of the cutter and the workpiece; on the basis of the CWE of the current cutter location point, the instantaneous cutting force is calculated and compared with the preset constant cutting force, and then the feeding speed is adjusted till the new instantaneous cutting force meets the requirement; and judging whether subsequent cutter location points exist or not, performing corresponding processing, and if all the cutter location points are completed, ending the processing. In combination with a cutting force result obtained through simulation, the cutting machining efficiency can be improved, the machining surface quality of a workpiece can be improved, cutter damage can be reduced, and the service life of a cutter can be prolonged by adjusting the machining instantaneous feeding speed and controlling the cutting load stability and the constant cutting force in the machining process.

Description

Technical Field

[0001] This invention relates to machining, and more specifically to a high-efficiency machining process with constant cutting force. Background Technology

[0002] Existing machining methods all use constant cutting parameters to ensure machining stability. However, in the machining of complex workpieces, the dynamic changes in the contact between the tool and the workpiece mean that constant cutting parameters cannot meet the requirements for stability and efficiency in the machining process. This is especially true for titanium alloys, which are difficult to machine due to their low elastic modulus, which makes them prone to cutting vibrations. This places excessive demands on the cutting tools, which are highly chemically reactive, prone to sticking, built-up edge, severe tool wear, and short tool life. If constant cutting parameters are continued to be used in the machining process, the machining efficiency will be low and the tool damage rate will be too high. Summary of the Invention

[0003] The purpose of this invention is to provide a high-efficiency machining process with constant cutting force in mechanical processing, thereby solving the above-mentioned problems.

[0004] In order to achieve these objectives and other advantages according to the present invention: A high-efficiency machining process with constant cutting force includes the following steps: S1: Input tool information, workpiece information and NC file, and plan all discrete points of the toolpath; S2: Read the current tool position point based on the toolpath discrete points; S3: Obtain the contact body CWE between the tool and the workpiece; S4: Based on the CWE at the current tool position, calculate the instantaneous cutting force, and adjust the feed rate according to the instantaneous cutting force until the instantaneous cutting force meets the requirements; S5: Determine if there are any subsequent tool positions. If so, proceed to step S2; if all tool positions have been completed, the machining ends.

[0005] Furthermore, in step S4, the instantaneous cutting force Includes three forces, namely tangential force. radial force and axial force The formulas are as follows: in, This represents the axial cutting depth. Let be the length of the infinitesimal element in the cutting direction; For the tangential force infinitesimal element, For radial force infinitesimal element, For the infinitesimal element of axial force, the following formulas are used for calculation: in, Let the cutting thickness be the value corresponding to the j-th micro-element. , , Here are the cutting force coefficients in each direction. , , The cutting force coefficients of the cutting edge in each direction are... Calculate the instantaneous cutting force for the cutting angle. ,as follows: .

[0006] Furthermore, the method for adjusting the feed rate is as follows: Determine the cutting force threshold When the instantaneous cutting force Greater than or less than the cutting force threshold At that time, the feed rate is adjusted using a dynamic feed rate adjustment formula: in, For the optimized feed rate, The initial feed rate, For reference material removal rate, This represents the initial material removal rate. The following can be derived from the material removal rate formula: in, Spatial cutting thickness, instantaneous cutting thickness f is the feed per tooth. The instantaneous rotation angle of the cutting teeth. For the cutting area micro-element, For single-tooth cutting time, use The calculations show that S is the rotational speed and N is the number of cutter teeth. Using the material removal rate formula, the preset threshold is... ,and This represents the real-time material removal rate.

[0007] Furthermore, the cutting force threshold The method for determining it is as follows: Establish the critical stress equation for the material: Where σ is the flow stress of the material, A is the initial yield stress, and B is the strain hardening coefficient. This is the equivalent plastic strain, where n is the strain hardening exponent and C is the strain rate strengthening coefficient. It is the current strain rate. This is the reference strain rate, and T is the current temperature. This is a reference temperature. is the material's melting point, and m is the thermal softening index; Calculate the critical failure stress Then, the cutting force threshold is obtained. : in, For the cutting area, This is an empirical constant.

[0008] Furthermore, in step S4, after adjusting and optimizing the cutting force in the toolpath segment, new cutting parameters will be generated and updated in the NC file.

[0009] Furthermore, after all tool positions are completed, the feed rate will undergo a transition process.

[0010] "Verification Research on High-Efficiency Machining with Constant Cutting Force" is a valuable and challenging research direction. It combines advanced control strategies (constant cutting force) with core manufacturing objectives (high-efficiency machining), aiming to improve the stability of the machining process, tool life, surface quality, and production efficiency. Through a rigorously designed experimental scheme, actual machining data is collected and analyzed. The performance differences between the constant cutting force control strategy and the traditional constant parameter (constant speed, constant feed) machining strategy in terms of efficiency, quality, and tool wear are compared, demonstrating the effectiveness and advantages of the constant cutting force control strategy.

[0011] Constant cutting force control can significantly improve machining efficiency (higher average material removal rate, shorter machining time) under specific working conditions (such as large allowance variations, poor workpiece rigidity, and difficult-to-machine materials). Constant cutting force control can improve machining process stability, reduce tool vibration and chatter risks, and protect tools and machine tools. The impact of constant cutting force control on tool wear / life (usually expected to extend life). The impact of constant cutting force control on machining quality (dimensional accuracy, surface roughness) (usually expected to be more stable or improved). Analyzing the impact of different target cutting force settings on efficiency, tool life, and quality helps to find the optimal balance point.

[0012] This research significantly improves product processing efficiency. When technicians have exhausted their skills and processes have been optimized to their limits, constant cutting force control further enhances machining efficiency, increases effective cutting time, and shortens product processing cycles. Under the same conditions, it increases the number of parts produced by the machine tool and reduces labor costs. In an environment of increasing market competition, intense competition within the industry, and a sharp decline in the value of individual products, companies in the same industry have largely similar hardware and software configurations in terms of personnel, equipment, and process solutions, resulting in comparable processing efficiency for the same products. In this environment, gaining a proactive position, establishing technological barriers, and becoming an industry leader becomes particularly important. The "Research on High-Efficiency Machining with Constant Cutting Force" is essentially a reasonable and effective way to achieve this goal. It often allows for a slight leap forward under conditions of equal hardware and software capabilities—a step that is often unattainable for competitors. This underscores the necessity of this research and represents a much-needed technology in the machining industry.

[0013] The beneficial effects of this invention are as follows: In the machining of complex workpieces, the dynamic changes in the contact between the tool and the workpiece mean that constant cutting parameters cannot meet the requirements for stability and efficiency. By performing offline geometric and physical simulations of the cutting process, the cutting state at each instant is obtained. Through adaptive optimization of cutting parameters, machining efficiency and product quality are improved. The material removal process is simulated using efficient Boolean operations based on octree node states, and the amount of material removed during the cutting process is calculated. A high-precision micro-element cutting force model is established to simulate and calculate the cutting force at each instant. Based on the cutting force results obtained from the simulation, the cutting load during the machining process is stabilized by adjusting the instantaneous feed rate. Constant cutting force can improve machining efficiency, increase the surface quality of the workpiece, reduce tool breakage, and extend tool life.

[0014] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0015] Figure 1 This is a flowchart of the present invention; Figure 2 Comparison of cutting force before and after optimization for the overall roughing process of titanium alloy beam; Figure 3 Comparison of cutting force before and after optimization for the precision milling of the internal shape of a titanium alloy beam. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0017] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. The following description relates to... In the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this specification. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this specification as detailed in the appended claims.

[0018] The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of this specification. The singular forms “a,” “the,” and “the” as used in this specification and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0019] It should be understood that although the terms first, second, third, etc., may be used in this specification to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this specification, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0020] The problem-solving approach of this invention: like Figure 1 A high-efficiency machining process with constant cutting force, characterized by comprising the following steps: S1: Input tool information, workpiece information and NC file, and plan all discrete points of the toolpath; Of course, there will also be machine tool settings, machine tool controller type, G and M code instructions, spindle speed, feed speed range, worktable limits, A and C axis rotation settings, acceleration / deceleration rate, etc. Tool settings and tool geometry definitions, such as tool diameter, taper, cutting edge length, rake angle, etc., must be consistent with the tool number in the machining NC code; Define the workpiece type, including workpiece geometry, material parameters, and workpiece coordinate system. Alternatively, the workpiece geometry model can be imported via STL / Step format. NC program settings include defining the machining coordinate system, selecting the machine tool control file, selecting the NC program to be optimized, importing the toolpath, and setting the initial tool position. This completes the establishment of the NC program dynamic optimization environment.

[0021] S2: Read the current tool position point based on the toolpath discrete points; S3: Obtain the contact body CWE between the tool and the workpiece; The present invention uses professional software (such as Third Wave Systems' Production Module) to automatically process CWE acquisition, applies Production Module simulation software, and studies the machining path optimization method for typical thin-walled rotating parts of aero-engines based on the constant cutting load control method. It also optimizes the machining path and process parameters of typical thin-walled rotating parts of aero-engines to obtain a variable feed high-efficiency machining process scheme for typical thin-walled rotating parts of aero-engines.

[0022] The feed rate during machining is optimized using the optimization software TWS PM. The part model and toolpath are imported into the software, a constant load threshold is determined, and the feed rate is automatically optimized during machining, solving problems such as idle stroke and large load changes that affect efficiency and machining quality.

[0023] This project involves machining typical thin-walled rotating parts for aero-engines. The CNC milling process involves numerous 4-axis or 5-axis simultaneous cutting operations, making the dynamic calculation of cutting forces and temperatures exceptionally complex and generating a large amount of data, necessitating the use of computational software or specialized simulation software. Using cutting forces and temperatures as the primary physical references for optimizing the machining process has been a key research focus both domestically and internationally. Simulation and parameter optimization techniques based on cutting force and temperature models are increasingly sophisticated. Many mature commercial simulation software programs abroad can simulate the entire process of cutting forces and temperatures during component machining and optimize the feed rate based on changes in these physical quantities. Among them, Third Wave Systems' Production Module cutting process analysis software has achieved excellent application results in the CNC machining process optimization of many difficult-to-machine parts. This project aims to optimize CNC milling parameters based on a physical model and will utilize Production Module software to establish a dynamic optimization environment for CNC milling parameters of typical thin-walled rotating parts for aero-engines. The Production Module comprehensively analyzes the workpiece, cutting tool, machine tool, and NC program to obtain data such as cutting force, temperature, material removal rate, and power consumption throughout the machining process. This data is then used to optimize feed rate and cutting speed in the NC program, achieving stable cutting force or temperature, reduced vibration, and shorter machining cycles. The basic data for cutting force and temperature calculations in the Production Module are derived from AdvantEdge FEM or cutting experiments, ensuring the effectiveness and accuracy of the calculations.

[0024] Using simulation software (such as Production Module), three-dimensional models of the tool and workpiece are created, and the contact area between the tool and workpiece is dynamically calculated through efficient Boolean operations (such as octree node state analysis).

[0025] S4: Based on the CWE at the current tool position, calculate the instantaneous cutting force, and adjust the feed rate according to the instantaneous cutting force until the instantaneous cutting force meets the requirements; S5: Determine if there are any subsequent tool positions. If so, proceed to step S2; if all tool positions have been completed, the machining ends.

[0026] Furthermore, in step S4, the instantaneous cutting force Includes three forces, namely tangential force. radial force and axial force The formulas are as follows: in, This represents the axial cutting depth. Let be the length of the infinitesimal element in the cutting direction; For the tangential force infinitesimal element, For radial force infinitesimal element, For the infinitesimal element of axial force, the following formulas are used for calculation: in, Let the cutting thickness be the value corresponding to the j-th micro-element. , , Here are the cutting force coefficients in each direction. , , The cutting force coefficients for each direction of the cutting edge (using the Production Module software, which imports theoretical parameters from tool design, such as material, number of cutting edges, helix angle, etc.; the software contains a tool database). Calculate the instantaneous cutting force for the cutting angle. ,as follows: .

[0027] Furthermore, the method for adjusting the feed rate is as follows: Determine the cutting force threshold When the instantaneous cutting force Greater than or less than the cutting force threshold The threshold is a manually set maximum limit that the software will not exceed during optimization. In other words, the instantaneous cutting force will not exceed the set threshold; if it does, optimization will be implemented. Figure 2 and 3As shown, red represents the effect before optimization, and green represents the effect after optimization. Figure 2 For the overall roughing process of titanium alloy beams, the optimized machining time was reduced from 14 hours to 10 hours, and the actual on-machine measurement showed a 29.5% increase in machining efficiency. Figure 3 For the precision milling of the internal shape of titanium alloy beams, the optimized machining time was reduced from 6.5 hours to 5 hours, with an actual on-machine measurement improvement of 21.1%. The feed rate was adjusted using a dynamic feed rate adjustment formula. in, For the optimized feed rate, The initial feed rate, For reference material removal rate, This represents the initial material removal rate. The following can be derived from the material removal rate formula: in, Spatial cutting thickness, instantaneous cutting thickness f is the feed per tooth. The instantaneous rotation angle of the cutting teeth. For the cutting area micro-element, For single-tooth cutting time, use The calculations show that S is the rotational speed and N is the number of cutter teeth. Using the material removal rate formula, the preset threshold is... ,and This represents the real-time material removal rate.

[0028] Furthermore, the cutting force threshold The method for determining it is as follows: Establish the critical stress equation for the material: Where σ is the flow stress of the material, A is the initial yield stress, and B is the strain hardening coefficient. This is the equivalent plastic strain, where n is the strain hardening exponent and C is the strain rate strengthening coefficient. It is the current strain rate. This is the reference strain rate, and T is the current temperature. This is a reference temperature. 'm' is the material's melting point, and 'm' is the thermal softening index (the Production Module in the process analysis software contains a material library with specific parameters for various types of materials, all obtained through experiments, etc.). Calculate the critical failure stress Then, the cutting force threshold is obtained. : in, For the cutting area, It is an empirical constant, usually taken as 0.6-0.8.

[0029] In step S4, after adjusting and optimizing the cutting force in the toolpath segment, new cutting parameters are generated and updated in the NC file. The original toolpath is not changed; only the updated F value is added to the end of each line of the NC program.

[0030] After all tool positions are completed, the feed rate will undergo a transition process.

[0031] The Production Module, through comprehensive analysis of the workpiece, cutting tool, machine tool, and NC program, obtains data on cutting force, temperature, material removal rate, and power consumption throughout the entire machining process. This data is then used to optimize feed rate and cutting speed in the NC program, achieving stable cutting force or temperature, reduced vibration, and shorter machining cycles. The basic data for cutting force and temperature calculations in the Production Module comes from AdvantEdge FEM or cutting experiments, ensuring the validity and accuracy of the calculations. Simply put, it optimizes the F-values ​​in each line of the NC program, making the cutting force relatively smooth at each location, without sudden abrupt changes—faster where it should be, and slower where it should be.

[0032] The optimization effects of this invention are as follows: (a) Optimization of rough milling parameters To ensure high roughing efficiency, appropriate cutting speeds and feed rates should be selected based on tool geometry and material properties to prevent tool breakage and allow the tool to enter a stable wear state, thus maximizing tool life while maintaining machining efficiency. However, in roughing, especially for typical thin-walled rotating parts of aero-engines, even with uniform cutting speeds and feed rates in CNC programming, the dynamic changes in radial width and axial depth of cut caused by multi-axis linkage during milling directly lead to dynamic fluctuations in material removal rate, cutting force, and cutting temperature. Therefore, achieving optimal dynamic cutting results through uniform machining parameter settings is difficult. Dynamic optimization of milling parameters is necessary to stabilize cutting force or material removal rate during the cutting process. Cutting force is one of the most significant factors affecting roughing; excessive cutting force can cause tool breakage due to insufficient strength, terminating the machining process. Therefore, dynamic optimization of CNC milling parameters based on a cutting force model should be employed during roughing.

[0033] To optimize CNC milling parameters for roughing, the tool linear speed v and machining feed rate f were adjusted.in Air cut feed rate f out and the cutting force F in the weakest rigidity direction of the blade n Set constraints. Constraining the tool linear velocity v ensures the spindle speed remains stable during CNC machining, preventing machining instability caused by sudden spindle speed changes and untimely machine tool response; constraining the machining feed rate f... in and air cut feed rate f out Constraints are set within a feasible feed rate range after comprehensively considering the working performance of the machine tool and cutting tools, which can prevent excessive feed rates; the cutting force F in the weakest rigid direction of the part is constrained. n Setting constraints involves dynamically optimizing CNC parameters based on the cutting force model. When the milling force exceeds the constraint range, the software can automatically adjust the feed rate to maintain a constant cutting force. The intersection of these constraints and feed rates is the final optimized CNC program result.

[0034] (b) Optimization of finishing milling parameters In the milling and finishing of typical thin-walled rotating parts for aero-engines, ensuring surface quality is the primary objective. The main sources of machining errors are tool wear and chatter. Tool wear is a typical force-thermal coupling process in cutting, while chatter is mainly affected by fluctuations in cutting force. Furthermore, cutting temperature is closely related to cutting force. Therefore, the constraints of both cutting force and cutting temperature on the machining process must be comprehensively considered during finishing. Similar to the roughing process, PM software is used for process analysis of the finishing process.

[0035] The surface roughness obtained in CNC milling is closely related to the tool feed rate. Since different parts of thin-walled rotating components have different surface roughness requirements, different feed rates can be applied to achieve good surface roughness for structural features with varying surface roughness requirements. Furthermore, in areas with smaller wall thicknesses of thin-walled rotating components, excessive cutting forces can easily lead to machining deformation and tool deflection, resulting in dimensional errors. Therefore, a smaller feed rate is suitable. Conversely, in areas with larger wall thicknesses, the workpiece has strong local rigidity and can withstand greater cutting forces, allowing for a more appropriate increase in feed rate, thus improving machining efficiency. In summary, in the finishing of typical thin-walled rotating parts for aero-engines, implementing a variable feed strategy that comprehensively considers the surface roughness requirements and the workpiece's structural rigidity characteristics is beneficial for improving machining efficiency and quality.

[0036] Based on the project's product (titanium alloy beam), the following economic feasibility analysis was conducted: 1. Improved direct processing efficiency: Material removal rate (MRR) is improved, ΔMRR = MRR_CF - MRR_CP.

[0037] Typical values ​​for titanium alloys: Conservative machining MRR = 8 cm³ / min → Optimized machining MRR = 9.6 cm³ / min (20% improvement).

[0038] Work time saved per piece: Work time saved = (Original work time - New work time) × Annual output.

[0039] Example: The original machining time for aviation connector parts (Ti6Al4V) was 100 minutes → after optimization with constant cutting force, it is 80 minutes, with an annual output of 2000 pieces.

[0040] Annual saving of working hours: (100-80)×2000=40,000 minutes=666 hours.

[0041] 2. Tool cost savings: Tool life is extended, and tool savings = (original tool consumption - new tool consumption) × unit price.

[0042] Constant cutting force suppresses force fluctuations → tool wear rate decreases by 30%~50%.

[0043] Example: φ10 carbide end mill (unit price 2,500 yuan), annual consumption reduced from 80 pieces to 45 pieces, annual savings: (80-45)×2,500=87,500 yuan.

[0044] 3. Reduced quality costs and lower scrap rate result in quality cost savings = (original scrap rate - new scrap rate) × unit cost × annual output.

[0045] Thin-walled parts processing: scrap rate reduced from 5% to 1.2% (chatter suppression).

[0046] Example: Unit cost is 8,000 yuan, annual output is 2,000 units → Annual savings: (5%-1.2%)×8,000×2,000=608,000 yuan.

[0047] 4. Reduced changeover time: No need for conservative trial cuts for different features, changeover time is shortened by 40%, equipment utilization is improved, abnormal downtime is reduced, and annual effective processing time is increased by 15%.

[0048] Benefits per unit: savings in labor time + savings in tooling + savings in quality. Economic comparisons across industry applications show significant advantages in high-value, difficult-to-machine, and low-rigidity parts. In the target market segment, constant cutting force technology is not only a technological upgrade but also a tool for restructuring profit margins. Quality cost savings are the largest source of benefit, and priority should be given to machining low-rigidity parts.

[0049] The overall cost can be reasonably estimated and is controllable after the design is completed. This technology will be mainly applied to the processing of large aluminum alloy, titanium alloy and high temperature alloy products. Compared with traditional cutting, the optimized solution through constant cutting force is expected to save 20% of the cost.

[0050] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A high-efficiency machining process with constant cutting force, characterized in that, Includes the following steps: S1: Input tool information, workpiece information and NC file, and plan all discrete points of the toolpath; S2: Read the current tool position point based on the toolpath discrete points; S3: Obtain the contact body CWE between the tool and the workpiece; S4: Based on the CWE at the current tool position, calculate the instantaneous cutting force, and adjust the feed rate according to the instantaneous cutting force until the instantaneous cutting force meets the requirements; S5: Determine if there are any subsequent tool positions. If so, proceed to step S2; if all tool positions have been completed, the machining ends.

2. The high-efficiency machining process with constant cutting force as described in claim 1, characterized in that, In step S4, the instantaneous cutting force Includes three forces, namely tangential force. radial force and axial force The formulas are as follows: in, This represents the axial cutting depth. Let be the length of the infinitesimal element in the cutting direction; For the tangential force infinitesimal element, For radial force infinitesimal element, For the infinitesimal element of axial force, the following formulas are used for calculation: in, Let the cutting thickness be the value corresponding to the j-th micro-element. , , Here are the cutting force coefficients in each direction. , , The cutting force coefficients of the cutting edge in each direction are... The cutting angle; Calculate instantaneous cutting force ,as follows: 。 3. The high-efficiency machining process with constant cutting force as described in claim 2, characterized in that, Feed rate adjustment method: Determine the cutting force threshold When the instantaneous cutting force Greater than or less than the cutting force threshold At that time, the feed rate is adjusted using a dynamic feed rate adjustment formula: in, For the optimized feed rate, The initial feed rate, For reference material removal rate, This represents the initial material removal rate. The following can be derived from the material removal rate formula: in, Spatial cutting thickness, instantaneous cutting thickness f is the feed per tooth. The instantaneous rotation angle of the cutting teeth. For the cutting area micro-element, For single-tooth cutting time, use The calculations show that S is the rotational speed and N is the number of cutter teeth. Using the material removal rate formula, the preset threshold is... ,and This represents the real-time material removal rate.

4. The high-efficiency machining process with constant cutting force as described in claim 3, characterized in that, Cutting force threshold The method for determining it is as follows: Establish the critical stress equation for the material: Where σ is the flow stress of the material, A is the initial yield stress, and B is the strain hardening coefficient. This is the equivalent plastic strain, where n is the strain hardening exponent and C is the strain rate strengthening coefficient. It is the current strain rate. This is the reference strain rate, and T is the current temperature. This is a reference temperature. is the material's melting point, and m is the thermal softening index; Calculate the critical failure stress Then, the cutting force threshold is obtained. : in, For the cutting area, This is an empirical constant.

5. The high-efficiency machining process with constant cutting force as described in claim 1, characterized in that, In step S4, after adjusting and optimizing the cutting force in the toolpath segment, new cutting parameters will be generated and updated in the NC file.

6. The high-efficiency machining process with constant cutting force as described in claim 1, characterized in that, In step S5, after all tool positions are completed, the feed rate will undergo a transition process.

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