Cutter loss control method for machining high-temperature-prone workpiece and related device

Abstract

The invention discloses a tool loss control method and related device for machining a workpiece prone to high temperature, and the method comprises the steps: generating a state quantity used for representing a current machining load according to a numerical control machining instruction and machining progress information in a through hole machining process; determining a risk judgment benchmark corresponding to the current processing working condition from a pre-established risk judgment database; performing first judgment on the state quantity and a risk judgment reference to obtain a judgment result of whether a tool loss risk state is entered or not; when the first judgment represents that the tool loss risk state is entered, the remaining machining task amount from the current moment to the through hole penetration completion is determined based on the machining progress information; performing second judgment on the residual processing task amount and an allowable residual task upper limit given by a risk judgment database; and according to the second judgment result, a tool changing control instruction is selected to be output or penetrating machining continues to be executed. The abnormal wear risk of the tool in the through hole machining process of the workpiece prone to high temperature is reduced, and unnecessary premature tool replacement is avoided.

Description

Technical Field

[0001] This invention relates to the field of CNC machine tool machining control and tool wear management technology, and in particular to a tool wear control method and related device for machining workpieces prone to high temperatures. Background Technology

[0002] In the field of machining, using rotary cutting tools to machine through holes in plate-shaped workpieces is a common machining method, widely used in aerospace and other intelligent manufacturing equipment industries. Through hole machining typically requires the cutting tool to continuously cut into the material along the axial direction until it penetrates the workpiece. This process is characterized by concentrated cutting time and sufficient contact between the tool and the material. When the workpiece is a titanium alloy, due to the material's high strength, good plasticity, and poor thermal conductivity, the heat generated during cutting is not easily dissipated through the workpiece but is concentrated near the tool and the cutting zone, thus subjecting the tool to a long-term high-temperature, high-friction working environment.

[0003] Under the aforementioned working conditions, titanium alloys are prone to bonding with tool materials at high temperatures, leading to the formation of accumulated chips or an adhesive layer on the tool cutting edge or rake face. This phenomenon increases cutting resistance, deteriorates cutting conditions, and further exacerbates tool wear, potentially causing tool chipping or breakage in severe cases. Therefore, in the machining of through holes in titanium alloy workpieces, how to ensure machining efficiency while avoiding excessive tool wear has always been a key concern.

[0004] To address the aforementioned issues, existing technologies typically monitor the tool's condition during machining to determine whether tool replacement or machining parameter adjustments are necessary. This involves real-time monitoring of the tool's or cutting area's temperature, force, or vibration, and making control decisions based on the monitoring results. The fundamental idea behind this approach is to use external information to reflect the degree of tool wear, thereby preventing continued machining with a failed tool. However, in practical applications, such solutions often require additional detection elements or sensors, resulting in a relatively complex system structure and placing high demands on installation space, environmental adaptability, and maintenance conditions. Furthermore, the monitoring and judgment process usually relies on a single threshold or instantaneous state, making it difficult to fully reflect the risk differences at different stages of through-hole machining. This can easily lead to premature tool replacement affecting machining efficiency, or delayed judgment causing tool malfunctions during critical penetration stages. Therefore, existing technologies still have shortcomings in balancing tool protection and machining efficiency, and require further improvement. Summary of the Invention

[0005] This application provides a tool wear control method for machining workpieces prone to high temperatures. It aims to solve the technical problems of existing methods that rely on external sensors for tool status monitoring during through-hole machining of workpieces prone to high temperatures. These methods are complex, costly, and difficult to balance machining efficiency and tool protection.

[0006] This invention is implemented as follows: a method for controlling tool wear in the machining of workpieces prone to high temperatures, comprising: During through-hole machining, state variables are generated to characterize the current machining load based on CNC machining instructions and machining progress information. Determine the risk assessment benchmark corresponding to the current processing condition from the pre-established risk assessment database; The state quantity is compared with the risk determination benchmark to make a first judgment, so as to obtain a judgment result on whether the tool wear risk state has been entered. When the first judgment characterization enters the tool wear risk state, the remaining machining task from the current moment to the completion of the through hole is determined based on the machining progress information; A second judgment is made between the remaining processing task volume and the allowed remaining task limit given by the risk assessment database; Based on the second judgment result, either output the tool change control command or continue to execute the through machining.

[0007] The present invention also provides a tool wear control device for machining workpieces prone to high temperatures, comprising: The state quantity generation module is used to generate state quantities that characterize the current machining load during the through hole machining process, based on CNC machining instructions and machining progress information. The risk baseline determination module is used to determine the risk assessment baseline corresponding to the current processing condition from a pre-established risk assessment database. The first judgment module is used to make a first judgment between the state quantity and the risk judgment benchmark to obtain a judgment result on whether the tool wear risk state has been entered. The remaining task quantity determination module is used to determine the remaining machining task quantity from the current moment until the through hole is completed, based on the machining progress information, when the first judgment characterization enters the tool wear risk state. The second judgment module is used to make a second judgment between the remaining processing task quantity and the allowed remaining task limit given by the risk judgment database. The decision output module is used to select whether to output a tool change control command or continue to execute through machining based on the second judgment result.

[0008] The present invention also provides a tool wear control device for machining workpieces prone to high temperatures, comprising: a memory and at least one processor, wherein the memory stores instructions, and the memory and the at least one processor are interconnected via a circuit; the at least one processor invokes the instructions in the memory to cause the tool wear control device for machining workpieces prone to high temperatures to perform the steps of the tool wear control method described above for machining workpieces prone to high temperatures.

[0009] The technical solution provided in this application allows the CNC system to obtain machining command parameters such as spindle speed and feed rate in real time during through-hole machining, as well as machining progress information such as hole depth and cutting duration. Based on this information naturally acquired by the system, a state quantity characterizing the current machining load is generated, enabling the load changes during machining to be quantified in a calculable and comparable form. Simultaneously, a risk assessment database pre-collects risk assessment benchmarks for different combinations of materials, tools, cooling methods, and machining parameters. This benchmark essentially provides the allowable load range for the tool to continue stable cutting under specific machining conditions. Comparing the state quantity with the risk assessment benchmark transforms the previously difficult-to-observe risks of tool adhesion and wear into a judgment of whether the load level has approached the risk boundary, thereby achieving timely identification of risk escalation trends without relying on real-time detection of cutting zone temperature or force.

[0010] When the comparison results indicate that the tool wear risk state has been entered, a tool change is not directly triggered. Instead, the remaining machining workload from the current moment until the through hole is completed is determined by combining the machining progress information. This workload is then compared with the upper limit of the allowed remaining workload given by the database. The remaining machining workload describes the amount of work required to continue completing the through hole at the current moment, while the upper limit of the allowed remaining workload describes the margin that the tool can still withstand under the premise of entering the risk state. Through this reassessment process, tool change decisions are no longer triggered solely by instantaneous risk conditions, but are matched with the remaining load required to complete the current hole machining: when the remaining workload is within the allowable upper limit, continuing through machining means that the tool completes the remaining work within the risk boundary, avoiding cycle time loss caused by premature tool change and reducing the possibility of sudden failure during the critical through-hole stage; when the remaining workload reaches or exceeds the allowable upper limit, continuing machining will more easily cross the risk boundary and induce increased adhesion, accelerated wear, or even chipping. At this time, outputting tool change control commands can cut off the failure chain before the risk is further amplified, thus balancing the reliability and efficiency of through hole machining, and demonstrating the ability of the machining process to develop towards machine intelligence at the decision-making level. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of an embodiment of the tool wear control method for machining workpieces prone to high temperatures according to the present invention; Figure 2 This is a schematic diagram of one embodiment of a tool wear control device for machining workpieces prone to high temperatures according to the present invention; Figure 3 This is a schematic diagram of one embodiment of a tool wear control device for machining workpieces prone to high temperatures, as described in this invention.

[0013] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0014] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0015] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0016] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the term "and / or" throughout the text includes three solutions; taking A and / or B as an example, it includes technical solution A, technical solution B, and a technical solution that simultaneously satisfies A and B. Furthermore, the technical solutions of various embodiments can be combined with each other, provided that they are feasible for those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0017] Figure 1 The implementation flow of the tool wear control method for machining workpieces prone to high temperatures provided in this embodiment is illustrated. For ease of explanation, only the parts relevant to this embodiment are shown, and are detailed below: Please see Figure 1 During the through-hole machining process, a state quantity representing the current machining load is generated based on the CNC machining instructions and machining progress information. Determine the risk assessment benchmark corresponding to the current processing condition from the pre-established risk assessment database; The state quantity is compared with the risk determination benchmark to make a first judgment, so as to obtain a judgment result on whether the tool wear risk state has been entered. When the first judgment characterization enters the tool wear risk state, the remaining machining task from the current moment to the completion of the through hole is determined based on the machining progress information; A second judgment is made between the remaining processing task volume and the allowed remaining task limit given by the risk assessment database; Based on the second judgment result, either output the tool change control command or continue to execute the through machining.

[0018] In one embodiment of the present invention, the through-hole processing process is divided into multiple processing stages, the multiple processing stages including at least a cutting stage, a through-hole stage and a retraction stage; The risk assessment database stores corresponding risk assessment benchmarks for different processing stages. The step of determining the risk assessment benchmark corresponding to the current processing condition from the pre-established risk assessment database specifically includes: determining the current processing stage based on the relationship between the current hole depth and the target hole depth, and querying the risk assessment benchmark corresponding to the current processing stage from the risk assessment database.

[0019] The following is a detailed description of the steps involved in the above embodiments: Specifically, the machining stages refer to the process segments in through-hole machining, divided according to the relative position of the tool and workpiece, the axial feed state, and whether the tool is in cutting contact. These stages differentiate the differences in heat accumulation, chip removal conditions, and adhesion risks. The entry stage is the segment where the tool enters the workpiece from the hole opening and establishes stable cutting. This stage is characterized by a rapid increase in the contact area between the tool and material, and the chip channel not yet being fully formed. The penetration stage is the segment where the tool is in stable cutting and advances towards the target hole depth until near penetration. This stage is characterized by continuous chip removal within the hole and a continuous increase in the accumulated heat load on the tool. The retraction stage is the segment where the tool exits the hole axially after penetration. This stage is characterized by frictional contact between the tool and the hole wall, and the cutting heat not yet completely dissipated. Specifically, the machining cycle status and axial command displacement of the CNC system can determine whether the tool is in feed, whether it is retracting, and the relationship between the current hole depth and the target hole depth, thus achieving stage division without introducing specialized modification equipment. This phased division separates sections with significantly different risks during the machining of the same through hole, freeing subsequent risk assessment and control from the limitations of a single threshold. This reduces the risk of misjudgment based on a one-size-fits-all approach to the entire process and improves the consistency between decisions and actual risk distribution. In other embodiments, machining stages can also be identified by fixed loop codes or macro program variables in CNC machining instructions. For example, a cutting-in stage marker can be written when entering a drilling cycle, switching to a through-hole stage marker after reaching a preset hole depth threshold, and switching to a retraction stage marker when executing a retraction command, thus achieving the same staged division effect.

[0020] The risk assessment database is a pre-established data set accessible by the CNC system, used to store risk assessment benchmarks according to machining stages and machining conditions. A risk assessment benchmark refers to the comparative basis used to determine whether a tool wear risk state has been entered. It can be in the form of a threshold, interval, or boundary set, and must at least support comparing state variables with the benchmark and outputting the judgment result. Specifically, the risk assessment database can be implemented using built-in tables in the controller, machine tool host computer files, or parameter tables issued by the manufacturing execution system. Index keys are established according to material type, tool type, cooling method, and machining stage, with the corresponding risk assessment benchmark stored under each index key. Taking the machining of through holes in titanium alloy plates as an example, the sources of adhesion risk for the same tool differ between the entry and retraction stages. The entry stage is more affected by the establishment of the chip channel, while the retraction stage is more affected by hole wall friction and heat retention. Therefore, storing risk assessment benchmarks in stages in the risk assessment database allows the comparison benchmarks to change with stage switching, making the risk assessment benchmarks closer to the actual risk level of that stage. This avoids applying benchmarks from high-risk stages to low-risk stages, leading to premature tool changes, or applying benchmarks from low-risk stages to high-risk stages, leading to delayed judgments. In other embodiments, the risk assessment database can also be implemented using a partitioned table structure, that is, setting up separate database sub-tables for the entry, penetration, and retraction stages. Each sub-table only stores the risk assessment benchmarks for that stage, thereby achieving the same effect of staged storage and retrieval.

[0021] The current hole depth refers to the axial feed depth that the tool has completed during through-hole machining, while the target hole depth refers to the required penetration depth of the through hole. Both can be directly obtained by the CNC system based on command displacement or cycle parameters, without the need for real-time detection of the tool or cutting zone. Specifically, in implementation, the CNC system reads the target hole depth as a fixed value and reads the depth count within the machining cycle or the Z-axis command position as the current hole depth. The current machining stage is determined by comparing the relationship between the current hole depth and the target hole depth: when the current hole depth is near the hole opening and a stable cutting range has not yet been formed, it is determined to be the entry stage; when the current hole depth continues to increase and no retraction command is entered, it is determined to be the penetration stage; when a reverse Z-axis displacement or a retraction command is detected, it is determined to be the retraction stage. Subsequently, using the determined current machining stage as a query condition, the risk assessment benchmark corresponding to this stage is retrieved from the risk assessment database and used for the subsequent first judgment. Taking a titanium alloy plate with a thickness of 10 mm and a hole diameter of 6 mm as an example, the target hole depth is set to 10 mm. The CNC system updates the current hole depth in real time during the drilling cycle. When the depth increases from 0 and is in the initial range of establishing cutting, it corresponds to the entry stage. When the depth continues to advance until it approaches the target hole depth, it corresponds to the penetration stage. When the cycle enters the retraction stage and reverse displacement occurs, it corresponds to the retraction stage. Three sets of risk assessment benchmarks from the database are called accordingly. This query mechanism binds the risk assessment benchmarks to the machining stage, allowing the risk assessment benchmarks to automatically switch with the stage during machining. It can achieve judgment conditions that match the stage risk without adding sensors, thereby improving the stability and interpretability of the judgment results. In other embodiments, the current machining stage can also be directly given by the machining segment number or macro variable in the CNC machining instruction. For example, the macro program writes a stage identifier when entering different machining segments, and then queries the risk assessment database based on this identifier, which can also realize the query and application of risk assessment benchmarks based on the stage.

[0022] In one embodiment of the present invention, the step of generating a state quantity to characterize the current machining load based on CNC machining instructions and machining progress information specifically includes: during through-hole machining, according to the spindle speed and feed rate in the CNC machining instructions, combined with the cutting time in the machining progress information, a first state component characterizing the cumulative load of the tool is obtained by cumulative calculation; a second state component characterizing the sensitivity of the current working condition is obtained by querying a preset parameter library based on material type, tool type, and cooling method as index conditions; and the first state component and the second state component are combined into an evaluation point. The first determination determines whether a tool wear risk state has been entered by judging whether the assessment point exceeds the risk assessment benchmark.

[0023] The following is a detailed description of the steps involved in the above embodiments: The first state component is a numerical value used to characterize the cumulative load borne by the tool in the current through-hole machining task. The cumulative load reflects the cumulative degree of heat and friction caused by continuous cutting under certain speed and feed conditions. Specifically, during through-hole machining, the CNC system can read the spindle speed and feed rate in the CNC machining command and read the cutting time from the machining progress information. Among them, the spindle speed is the spindle rotation speed set in the through-hole machining command, the feed rate is the axial feed rate set in the through-hole machining command, and the cutting time is the cumulative duration of the tool being in the cutting contact state. The cumulative calculation of the first state component can be performed according to the interpolation cycle of the CNC system. That is, when the tool is in the cutting contact state, it is accumulated once per interpolation cycle, and the load contribution corresponding to the spindle speed and feed rate in each interpolation cycle is added to the first state component; when the tool is not in the cutting contact state, the accumulation is paused. Taking the machining of through holes in titanium alloy plates as an example, the CNC system can read the current spindle speed and feed rate in each interpolation cycle during the drilling cycle, and include the incremental cutting time of that cycle in the first state component, thereby obtaining the cumulative load that increases with the depth of hole advance. This method discretizes the continuous cutting process into repeatable accumulation units, allowing the first state component to be updated in line with the actual machining cycle, and it does not rely on the detection of temperature or force in the cutting zone. Therefore, it forms a comparable quantity reflecting the load accumulation trend without any increase in hardware.

[0024] The second state component is a numerical value used to characterize the sensitivity of the current operating condition. This sensitivity reflects the difference in susceptibility of the combination of material, tool, and cooling method to high-temperature adhesion and accelerated wear, mapping the same cumulative load to different risk levels. Specifically, material type, tool type, and cooling method are used as index conditions to retrieve the second state component from a preset parameter library. The material type can be determined by the process document or machining task number; the tool type can be determined by the tool number and tool information table; and the cooling method can be determined by the cooling switch status or cooling mode number in the CNC machining instruction. The preset parameter library can adopt a tabular storage structure, using the combination of material type, tool type, and cooling method as the index key, storing the corresponding second state component under each index key. Taking through-hole machining of titanium alloy plates as an example, if the material type is titanium alloy, the tool type is carbide drill bit, and the cooling method is micro-lubrication, the preset parameter library returns a set of second state components matching this combination. If the cooling method is switched to dry cutting, the preset parameter library returns a second state component with a higher sensitivity, reflecting a higher risk level. By encoding material and process differences as a second-state component, subsequent judgments will not confuse risk levels under different operating conditions, thereby reducing misjudgments caused by a single threshold across multiple operating conditions. In other embodiments, the preset parameter library can also add aperture and plate thickness as additional index conditions, making the second-state component more sensitive to geometric conditions and achieving a more refined operating condition differentiation effect without changing the core idea.

[0025] An evaluation point is a point-like representation of the current machining state, obtained by combining a first state component and a second state component. The combination of evaluation points should at least ensure that the first and second state components can work together in subsequent comparisons. Specifically, the first state component can be used as one component of the evaluation point, and the second state component as the other, thus forming a two-dimensional evaluation point. In implementation, after each update of the first state component, the CNC system calls a preset parameter library to obtain the second state component and writes both into the same data structure as the evaluation point for subsequent judgment. Taking through-hole machining as an example, after the tool advances to a certain hole depth, the first state component has accumulated to the corresponding value, while the second state component is determined by the material type, tool type, and cooling method index. At this point, the evaluation point can simultaneously reflect the cumulative load level and the sensitivity of the working condition. This combination method, by reflecting load accumulation and working condition differences in the same representation, enables the comparison process to distinguish the risk differences of the same cumulative load under different materials or cooling conditions, thus more closely reflecting the actual changing patterns of cutting risks. In other embodiments, the evaluation points can also be implemented in the form of a weighted composite single value, that is, the first state component and the second state component are combined into a single comprehensive value according to a preset weight, and then used to compare with the risk judgment benchmark, thereby reducing the storage and comparison dimensions.

[0026] The first judgment is a process of determining whether to enter a tool wear risk state by judging whether the evaluation point exceeds the risk judgment benchmark. The risk judgment benchmark is a comparison basis pre-stored in the risk judgment database for the current machining condition. Specifically, in implementation, after the CNC system obtains the risk judgment benchmark corresponding to the current machining condition, it compares the current evaluation point with the risk judgment benchmark. When the evaluation point is within the safe range allowed by the risk judgment benchmark, it is determined that no tool wear risk state has been entered; when the evaluation point exceeds the risk judgment benchmark, it is determined that a tool wear risk state has been entered. If the risk judgment benchmark is stored in the form of a threshold, the comparison method is to compare the comprehensive value of the evaluation point with the threshold; if the risk judgment benchmark is stored in the form of a region or boundary, the comparison method is to judge whether the evaluation point falls into the risk region. Taking the machining of titanium alloy through holes as an example, as the cutting time increases, the first state component continues to rise. When the cooling method is dry cutting or insufficient cooling, the second state component is higher, and the evaluation point is more likely to approach and exceed the risk judgment benchmark, thus triggering the judgment of entering the risk state earlier, which is consistent with the working condition characteristics of titanium alloy high-temperature adhesion accelerated wear. By mapping continuously accumulating load information and condition-sensitive information onto the risk assessment benchmark, the risk status determination can dynamically change as processing progresses, enabling timely identification of rising risks without the need for additional sensors. In other embodiments, a hysteresis interval can be added to the first judgment, i.e., when the assessment point just exceeds the risk assessment benchmark, an early warning state is entered first, and when it exceeds a higher second threshold, a risk state is entered. This reduces control jitter caused by repeated switching near the boundary while achieving the same risk identification objective.

[0027] In one embodiment of the present invention, the first state component is used as the first coordinate axis value of the equivalent load coordinate system, and the second state component is used as the second coordinate axis value of the equivalent load coordinate system. The evaluation point is a coordinate point in the equivalent load coordinate system determined by the first state component and the second state component; The risk assessment criterion is represented as the risk boundary in the equivalent load coordinate system; Determining whether the assessment point exceeds the risk assessment benchmark specifically includes: determining whether the coordinate point is located within the risk area defined by the risk boundary; when the coordinate point is located within the risk area, it is determined that the assessment point exceeds the risk assessment benchmark.

[0028] The following is a detailed description of the steps involved in the above embodiments: The equivalent load coordinate system is a two-dimensional data representation method used to express the machining state during through-hole machining. The first coordinate axis characterizes the change in cumulative tool load, and the second coordinate axis characterizes the difference in sensitivity to working conditions. Specifically, when the CNC system executes the through-hole machining cycle, the first state component is continuously updated, and the second state component is acquired each time a judgment is needed. The first state component is then used as the first coordinate axis value of the equivalent load coordinate system, and the second state component is used as the second coordinate axis value. Taking through-hole machining of titanium alloy plates as an example, as the cutting time increases, the first state component gradually increases, while the second state component is determined by the material type, tool type, and cooling method index and remains unchanged within the hole machining task or is updated according to working conditions. This allows the equivalent load coordinate system to simultaneously reflect the load increase due to time accumulation and the difference in risk sensitivity due to working condition differences. Because the state information from two different sources is expressed in a fixed coordinate axis, subsequent risk judgments can be directly compared on a unified scale, avoiding the mixing of cumulative load and working condition sensitivity into an uninterpretable single quantity, thereby improving the reproducibility and auditability of the judgment process. In other embodiments, the first coordinate axis value may also be provided by the first state component obtained by accumulating the hole depth increment, and the second coordinate axis value may be obtained by further incorporating the index factor of hole diameter or plate thickness before querying.

[0029] An evaluation point is a coordinate point in the equivalent load coordinate system determined by the first and second state components, representing the current machining state's position in that coordinate system. Specifically, in implementation, the CNC system updates the first state component at each interpolation cycle or each preset hole depth increment, and simultaneously reads or queries the second state component, then writes both into the same record as the evaluation point. When a first judgment needs to be performed, the latest evaluation point is directly called for comparison. Taking the machining of a through hole in a 10mm thick titanium alloy plate with a 6mm diameter as an example, during the hole depth advancement, the evaluation point gradually moves along the first coordinate axis. When the cooling method switches from micro-lubrication to dry cutting, the second state component increases, and the evaluation point jumps along the second coordinate axis, allowing the change in the evaluation point's position to directly reflect the increased risk brought about by the increased sensitivity of the working condition. By mapping the dynamic information during the machining process into a coordinate point trajectory, risk judgment is transformed from dependence on instantaneous signals to judgment of coordinate point positions, thus achieving continuous tracking of risk evolution trends without the need for external sensors.

[0030] Risk boundaries are the representation of risk assessment benchmarks in an equivalent load coordinate system, used to define risk and non-risk areas. Specifically, the risk assessment database stores corresponding risk assessment benchmarks for different machining stages and converts these benchmarks into risk boundaries in the equivalent load coordinate system. Risk boundaries can be stored as boundary point sets, piecewise linear boundaries, or rectangular boundary intervals, allowing the CNC system to directly call and determine coordinate points. Taking the machining of through holes in titanium alloy plates as an example, the risk boundary in the entry stage can be set closer to the origin to reflect the greater sensitivity to load when the chip channel is not yet stable. The risk boundary in the penetration stage can be appropriately widened along the first coordinate axis to accommodate the cumulative load increase of stable cutting. The risk boundary in the retraction stage can be set with stricter restrictions along the second coordinate axis to reflect the increased adhesion risk caused by hole wall friction and heat retention. By storing the risk assessment benchmarks for different stages in the form of geometric boundaries, the judgment process is transformed into a judgment of whether the coordinate point falls into the region. This avoids the contradiction that a single threshold is difficult to consider in multiple stages and establishes a one-to-one correspondence between the database content and the judgment logic, facilitating reproduction and verification. In other embodiments, the risk boundary can also be stored in the form of a one-dimensional threshold curve with the second state component as input. That is, the corresponding first state component threshold is given under different values ​​of the second state component, which can still be equivalently represented as a boundary curve in the equivalent load coordinate system and achieve the same purpose of risk area division.

[0031] The process of determining whether an assessment point exceeds the risk assessment benchmark is implemented in the equivalent load coordinate system as determining whether the coordinate point is located within the risk area defined by the risk boundary. Specifically, the CNC system reads the risk boundary corresponding to the current machining stage from the risk assessment database and obtains the current assessment point as the coordinate point; then, it executes the region determination algorithm, which can adopt point-to-point determination of the boundary point set, half-plane determination of the piecewise linear boundary, or interval determination of the rectangular boundary. Taking the boundary point set as an example, a closed polygon can be generated first based on the risk boundary, and then it can be determined whether the coordinate point is located inside the polygon; taking the rectangular boundary as an example, it can be directly determined whether the first state component exceeds the upper limit of the first coordinate axis and whether the second state component exceeds the upper limit of the second coordinate axis. If the conditions are met, the coordinate point is determined to be within the risk area. Taking the machining of titanium alloy through holes as an example, as the cutting progresses, the coordinate point grows along the first coordinate axis. When entering a highly sensitive working condition, the coordinate point rises on the second coordinate axis. The superposition of the two makes the coordinate point more likely to enter the risk area, thereby triggering the determination of entering the tool wear risk state. This determination method transforms the coupling of multi-factor risks into a geometric region attribution judgment, allowing the combined effect of different factors to be naturally reflected through the coordinate point location. This reduces misjudgments caused by relying solely on a single quantity and ensures that the determination process is consistently executable across different machine tools and different batches of processing.

[0032] In one embodiment of the present invention, determining the remaining processing workload from the current moment until the through hole is completed based on the processing progress information specifically includes: The current completed hole depth is obtained from the processing progress information. The remaining axial distance from the current moment to the completion of the through hole is calculated based on the difference between the target hole depth and the current completed hole depth. The remaining axial distance represents the remaining processing workload.

[0033] The following is a detailed description of the steps involved in the above embodiments: The current completed hole depth is a numerical value in the machining progress information used to characterize the axial feed depth that the tool has completed in the current through hole. The target hole depth is the required penetration depth of the through hole. Both are process data that the CNC system can directly obtain or calculate when executing the through hole machining cycle. Specifically, in implementation, the CNC system reads the target hole depth set in the through hole machining cycle before starting to machine the through hole, and acquires the current completed hole depth in real time during the through hole machining process. The current completed hole depth can be obtained by reading and accumulating the command displacement increment of the Z-axis, or by reading the depth count variable inside the through hole machining cycle. Subsequently, the remaining axial distance from the current moment to the completion of the through hole penetration is calculated based on the difference between the target hole depth and the current completed hole depth, and this remaining axial distance is used to characterize the remaining machining workload. Taking the machining of through holes in titanium alloy plates as an example, with a plate thickness of 10 mm and a target hole depth set at 10 mm, when the CNC system reads that the currently completed hole depth is 7.2 mm, the difference is 2.8 mm. The corresponding remaining axial distance is 2.8 mm, which represents the amount of axial advancement work that still needs to be completed for the through hole. The reason for using the remaining axial distance to characterize the remaining machining workload is that the main machining task of through hole machining unfolds along the axial direction. The axial distance has a monotonic relationship with the remaining cutting time and the remaining cutting contact length. The smaller the remaining axial distance, the shorter the subsequent cutting contact process required to complete the penetration. The additional load that the tool needs to continue to bear under the current risk state is more limited, thus providing a directly comparable quantitative basis for judging whether to allow continued penetration or trigger a tool change. In other embodiments, the current completed hole depth can also be obtained from the difference between the hole reference position in the machine tool coordinate system and the current tool tip command position, or directly from the completed feed amount of the through hole machining cycle output by the CNC system. The remaining axial distance can still be formed by the difference between the target hole depth and the current completed hole depth, and the same effect of representing the remaining machining task can be achieved.

[0034] In one embodiment of the present invention, a through-window is defined as a processing interval in which the distance from the current hole depth to the target hole depth is less than or equal to a preset window threshold, wherein the preset window threshold is determined according to the hole diameter; The second determination is triggered only when the remaining axial distance is within the through window.

[0035] The following is a detailed description of the steps involved in the above embodiments: A through-hole window refers to the axial end of the machining section near the completion of the through-hole process. It is determined when the distance from the current hole depth to the target hole depth is less than or equal to a preset window threshold, where the distance corresponds to the remaining axial distance. The preset window threshold is a threshold parameter used to define the width of the through-hole window. This threshold is determined based on the hole diameter, which can be obtained directly from process documents or CNC machining instructions. Specifically, in implementation, the CNC system reads the hole diameter before starting machining and determines the preset window threshold accordingly. Then, during through-hole machining, the remaining axial distance is calculated in real time. When the remaining axial distance is less than or equal to the preset window threshold, the current machining position is determined to be within the through-hole window. Taking through-hole machining of titanium alloy plates as an example, when the hole diameter is 6 mm, the preset window threshold is determined by the axial distance of the same order of magnitude as the hole diameter to ensure that the through-hole window covers the section where the cutting contact state changes rapidly when the tool approaches penetration. When the target hole depth is 10 mm and the currently completed hole depth is 9.2 mm, the remaining axial distance is 0.8 mm. If the preset window threshold is 1.2 mm, then at this moment, it is within the through-hole window. The reason for associating the through-hole window with the hole diameter is that the hole diameter directly affects the cutting contact length of the tool, the chip cross-sectional area, and the chip removal space. When the hole diameter increases, the heat accumulation and chip congestion effect before penetration are more pronounced in a longer axial range, requiring a wider through-hole window for risk control. When the hole diameter decreases, the risk mutation range is relatively narrower. Using a preset window threshold associated with the hole diameter can make the through-hole window width adapt to the geometric scale without introducing additional sensors, thereby avoiding unnecessary frequent triggering due to excessive width, and also avoiding failure to cover the risk mutation range due to excessive narrowness. In other embodiments, the preset window threshold can also be determined based on the aperture and the plate thickness. For example, when the aperture is fixed and the plate thickness is large, the preset window threshold can be appropriately increased to cover a more obvious heat retention area, thereby achieving a similar risk coverage effect under the same through-window determination logic.

[0036] The second judgment is triggered only when the remaining axial distance is within the through-window. This means that the second judgment is only executed when the remaining axial distance is less than or equal to a preset window threshold, comparing the remaining machining task with the allowed remaining task limit. If the remaining axial distance is greater than the preset window threshold, the second judgment is not executed. Specifically, in implementation, each time a risk control decision needs to be made, the CNC system first determines whether the remaining axial distance has entered the through-window. If it has not entered the through-window, the second judgment step is skipped, and the system continues along the predetermined machining instructions or follows the system's default strategy. If it has entered the through-window, the second judgment is triggered, and either the system outputs a command to continue through-machining or a tool change control command is output. Taking the machining of through holes in titanium alloys as an example, before the hole depth reaches the penetration window, the tool is in a relatively stable cutting advance stage. Although the cumulative load increases, there is still a considerable margin before penetration is completed. At this time, frequent execution of the second judgment would lead to unnecessary decision-making overhead and increase the probability of conservative tool change. After entering the penetration window, the tool cutting contact state, chip removal state, and hole bottom boundary conditions change rapidly, and adhesion and wear are more likely to accelerate in a short period of time. Triggering the second judgment within this range can concentrate decision-making resources on the high-risk window. By comparing the remaining axial distance with the upper limit of the allowed remaining task, it can be determined whether completing the window under the current risk state is still within a controllable range. This triggering strategy, by limiting the second judgment to the penetration window, aligns the tool change decision with the risk mutation range in time and space, reducing premature tool changes in the low-risk range and improving the timeliness of risk handling in the high-risk range.

[0037] In one embodiment of the present invention, the preset window threshold is calculated by multiplying the aperture by a preset coefficient, which is obtained by querying the risk assessment database according to the material type and tool type; When the first judgment characterizes the tool wear risk state but the remaining axial distance is not within the through window, it is directly determined to output a tool change control command.

[0038] The following is a detailed description of the steps involved in the above embodiments: The preset window threshold is a threshold parameter used to define the width of the through-hole. The aperture is the diameter of the through hole, and the preset coefficient is a proportional parameter used to convert the aperture into the axial window width. The preset window threshold is calculated by multiplying the aperture by the preset coefficient, maintaining a proportional relationship between the preset window threshold and the aperture, thus allowing the axial range covered by the through-hole to adaptively change with geometric dimensions under different aperture conditions. The preset coefficient is obtained from the risk assessment database based on material type and tool type. The material type is determined by the machining task or process document, and the tool type is determined by the tool number and tool information table. Specifically, in implementation, the CNC system reads the aperture before starting to machine the through hole and retrieves the preset coefficient from the risk assessment database using material type and tool type as indexes. Then, the aperture is multiplied by the preset coefficient to obtain the preset window threshold, which is used as the basis for subsequent comparison to determine whether the remaining axial distance enters the through-hole. Taking the machining of through holes in titanium alloy plates as an example, the material type is titanium alloy, the tool type is carbide drill bit, and the risk assessment database returns a preset coefficient. When the hole diameter is 6 mm, the preset window threshold is obtained by multiplying the hole diameter by the preset coefficient. The corresponding penetration window can cover the axial range where the changes in cutting contact state and hole bottom boundary conditions are more significant when approaching penetration. It is easy to understand that as the hole diameter increases, the chip cross-sectional area increases, the tool contact length and the scale of heat input increase simultaneously, and the range of influence of risk changes before penetration also expands. Using a preset window threshold proportional to the hole diameter can make the penetration window width expand with the hole diameter, thereby avoiding compressing the high-risk range of large-diameter working conditions into an excessively narrow window, resulting in insufficient coverage. When the hole diameter decreases, the risk mutation range is relatively convergent, and the proportional relationship can avoid the unnecessary frequent triggering of secondary assessments due to an excessively wide window.

[0039] When the first judgment indicates the tool wear risk state but the remaining axial distance is not within the penetration window, the tool change control command is directly output. This means that if the first judgment confirms that the current evaluation point exceeds the risk judgment benchmark, and the current remaining axial distance is greater than the preset window threshold, it indicates that the current machining position has not yet entered the penetration window. In this case, the second judgment is not triggered, and the tool change control command is directly output. Specifically, in implementation, after each update of the evaluation point and completion of the first judgment, if the CNC system determines that the tool wear risk state has been entered, it further reads the current remaining axial distance and compares it with the preset window threshold. When the comparison result shows that the remaining axial distance is greater than the preset window threshold, the tool change control command is immediately output and the current tool advance is terminated. Taking the machining of titanium alloy through holes as an example, if the evaluation point exceeds the risk judgment benchmark when the hole depth is still in the middle to early stage, it means that the tool has already shown a high risk level before entering the penetration window. Since there is still a long axial distance before the penetration is completed, the subsequent cutting contact and heat accumulation process will still need to be experienced for a long time. Continuing to machine will further increase the cumulative load and make the development path of adhesion and wear acceleration more difficult to reverse, thus making it easier to cause chipping or loss of hole quality control in the later stages. Therefore, under these conditions, directly outputting tool change control commands can preemptively break the risk accumulation chain when the risk has been confirmed and the remaining workload is still significant, preventing high-risk tools from entering the more sensitive penetration window and retraction stages. It's easy to understand that strictly limiting the applicability of the secondary judgment to the penetration window reduces misuse of the allowable upper limit in non-penetration window stages, while making tool change decisions more decisive under long remaining workload conditions, thereby reducing the probability of sudden failure caused by prolonged high-temperature cutting.

[0040] In one embodiment of the present invention, the step of performing a second judgment between the remaining processing task quantity and the allowed remaining task limit given by the risk assessment database specifically includes: Compare the remaining axial distance with the upper limit of the allowed remaining tasks; When the remaining axial distance is less than the maximum allowable remaining task, the second determination result is that the through-processing can continue. When the remaining axial distance is greater than or equal to the allowed remaining task limit, the second judgment result is determined to output a tool change control command.

[0041] The following is a detailed description of the steps involved in the above embodiments: The maximum allowable remaining task limit is a threshold value provided by the risk assessment database to limit the maximum amount of remaining machining work that can be completed after entering a tool wear risk state. In this scheme, it is expressed in axial distance dimensions and compared with the remaining axial distance in the same dimension. The value of the maximum allowable remaining task limit is determined by the risk assessment database according to the index item corresponding to the current machining condition. The index item at least includes the machining stage and condition information related to material type, tool type, and cooling method, so that the maximum allowable remaining task limit can reflect the difference in the allowable margin that the tool can still withstand under risk conditions under different conditions. Specifically, in implementation, when the first judgment indicates that a tool wear risk state has been entered and the second judgment trigger condition is met, the CNC system reads the maximum allowable remaining task limit from the risk assessment database and at the same time reads the remaining axial distance calculated in the previous stage; then, a numerical comparison is performed to determine the magnitude of the remaining axial distance and the maximum allowable remaining task limit. Taking the machining of through holes in titanium alloy plates as an example, after entering the through-hole window in a 6 mm diameter, 10 mm thick plate, if the risk assessment database gives an allowable remaining task limit of 0.9 mm, and the current remaining axial distance is 0.6 mm, the comparison result shows that the remaining axial distance is less than the allowable remaining task limit, and the second judgment result is determined to allow continued through-hole machining. The significance of this comparison method is that it transforms the decision after entering a risk state from a single-point judgment of the risk state itself to a judgment of the relationship between the remaining task amount and the acceptable allowance. When the remaining axial distance is less than the allowable remaining task limit, the axial advance distance that still needs to be completed is shorter, and the corresponding new cutting contact process and new thermal friction accumulation are limited. Under the premise of entering a risk state, it still remains within the controllable allowance range defined by the database. Therefore, allowing continued through-hole machining can reduce the probability of premature tool change while avoiding pushing the tool into the uncontrollable failure range.

[0042] When the remaining axial distance is greater than or equal to the upper limit of the allowed remaining task, the second judgment result is to output a tool change control command. This means that the comparison result indicates that the amount of axial advance task to be completed has reached or exceeded the allowable margin boundary of the risk judgment database, thus disallowing further through-machining. Specifically, in implementation, after completing the above comparison, if the CNC system determines that the remaining axial distance is greater than or equal to the upper limit of the allowed remaining task, it directly outputs a tool change control command, controlling the machine tool to stop the current tool advance and enter the tool change process or prompt for a tool change. Taking the machining of the same through hole as an example, if the allowed remaining task limit is 0.9 mm, and the current remaining axial distance is 1.1 mm, it means that even after entering a risky state, a relatively long cutting contact and chip removal process within the hole is still required. Due to the poor thermal conductivity of titanium alloy, heat is concentrated, and adhesion and wear have a cumulative amplification characteristic during continued cutting. The larger the remaining axial distance, the longer the duration of the corresponding thermal friction. The accumulated chips and adhesion layers are more likely to be repeatedly compacted in the critical section, inducing sudden chipping. Therefore, this situation is judged as requiring the output tool change control command to interrupt continued machining before the risk boundary is crossed, reducing the probability of hole scrap and tool breakage. This threshold comparison method is reproducible; the CNC system only needs to read the database threshold and perform a numerical comparison once to execute, avoiding reliance on real-time detection signals such as temperature or force. As an equivalent implementation, the upper limit of the remaining task can also be given by the risk assessment database in multiple interval values. For example, the upper limit of the remaining task can be given for different aperture ranges, or different upper limits of the remaining task can be given for different cooling methods in the same processing stage. The comparison rules remain unchanged, and secondary judgment with the remaining axial distance as the characterization quantity can still be achieved and similar decision-making effects can be obtained.

[0043] The above describes the tool wear control method for machining high-temperature workpieces according to embodiments of the present invention. The following describes the tool wear control device for machining high-temperature workpieces according to embodiments of the present invention. Please refer to [link to relevant documentation]. Figure 2 One embodiment of the tool wear control device for machining workpieces prone to high temperatures according to the present invention includes: The state quantity generation module 101 is used to generate state quantities that characterize the current machining load based on CNC machining instructions and machining progress information during through hole machining. The risk baseline determination module 102 is used to determine the risk assessment baseline corresponding to the current processing condition from a pre-established risk assessment database. The first judgment module 103 is used to make a first judgment between the state quantity and the risk judgment benchmark to obtain a judgment result on whether the tool wear risk state has been entered. The remaining task quantity determination module 104 is used to determine the remaining machining task quantity from the current moment to the completion of the through hole penetration based on the machining progress information when the first judgment characterization enters the tool wear risk state. The second judgment module 105 is used to make a second judgment between the remaining processing task quantity and the allowed remaining task limit given by the risk judgment database. The decision output module 106 is used to select whether to output a tool change control command or continue to execute through machining based on the second judgment result.

[0044] above Figure 2 The tool wear control device for machining high-temperature workpieces in this embodiment of the invention is described in detail from the perspective of modular functional entities. The tool wear control equipment for machining high-temperature workpieces in this embodiment of the invention is described in detail from the perspective of hardware processing.

[0045] Figure 3 This is a schematic diagram of a tool wear control device 200 for machining high-temperature workpieces, provided by an embodiment of the present invention. The tool wear control device 200 for machining high-temperature workpieces can vary significantly due to different configurations or performance characteristics. It may include one or more processors 210 (e.g., one or more processors) and a memory 220, and one or more storage media 230 (e.g., one or more mass storage devices) for storing application programs 233 or data 232. The memory 220 and storage media 230 can be temporary or persistent storage. The program stored in the storage media 230 may include one or more modules (not shown in the diagram), each module including a series of instruction operations on the tool wear control device 200 for machining high-temperature workpieces. Furthermore, the processor 210 may be configured to communicate with the storage media 230 and execute the series of instruction operations in the storage media 230 on the tool wear control device 200 for machining high-temperature workpieces to implement the steps of the tool wear control method for machining high-temperature workpieces described above.

[0046] The tool wear control device 200 for machining workpieces prone to high temperatures may further include one or more power supplies 240, one or more wired or wireless network interfaces 250, one or more input / output interfaces 260, and / or one or more operating systems 231, such as Windows Server, Mac OS X, Unix, Linux, FreeBSD, etc. Those skilled in the art will understand that... Figure 3 The illustrated tool wear control device structure for machining workpieces prone to high temperatures does not constitute a limitation on the tool wear control device for machining workpieces prone to high temperatures provided by the present invention. It may include more or fewer components than illustrated, or combine certain components, or have different component arrangements.

[0047] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A tool wear control method for high temperature workpiece machining, characterized by, include: During through-hole machining, state variables are generated to characterize the current machining load based on CNC machining instructions and machining progress information. Determine the risk assessment benchmark corresponding to the current processing condition from the pre-established risk assessment database; The state quantity is compared with the risk determination benchmark to make a first judgment, so as to obtain a judgment result on whether the tool wear risk state has been entered. When the first judgment characterization enters the tool wear risk state, the remaining machining task from the current moment to the completion of the through hole is determined based on the machining progress information; A second judgment is made between the remaining processing task volume and the allowed remaining task limit given by the risk assessment database; Based on the second judgment result, either output the tool change control command or continue to execute the through machining.

2. The tool wear control method for machining workpieces prone to high temperatures according to claim 1, characterized in that, The through-hole machining process is divided into multiple machining stages, which include at least the cutting stage, the through-hole stage, and the retraction stage. The risk assessment database stores corresponding risk assessment benchmarks for different processing stages. The step of determining the risk assessment benchmark corresponding to the current processing condition from the pre-established risk assessment database specifically includes: determining the current processing stage based on the relationship between the current hole depth and the target hole depth, and querying the risk assessment benchmark corresponding to the current processing stage from the risk assessment database.

3. The tool wear control method for machining workpieces prone to high temperatures according to claim 2, characterized in that, The process of generating state variables to characterize the current machining load based on CNC machining instructions and machining progress information specifically includes: during through-hole machining, calculating a first state component characterizing the cumulative load on the tool by accumulating the spindle speed and feed rate in the CNC machining instructions and the cutting time in the machining progress information; querying a second state component characterizing the sensitivity of the current working condition from a preset parameter library based on material type, tool type, and cooling method as index conditions; and combining the first state component and the second state component into an evaluation point. The first determination determines whether a tool wear risk state has been entered by judging whether the assessment point exceeds the risk assessment benchmark.

4. The tool wear control method for machining workpieces prone to high temperatures according to claim 3, characterized in that, The first state component is used as the first coordinate axis value of the equivalent load coordinate system, and the second state component is used as the second coordinate axis value of the equivalent load coordinate system. The evaluation point is a coordinate point in the equivalent load coordinate system determined by the first state component and the second state component; The risk assessment criterion is represented as the risk boundary in the equivalent load coordinate system; Determining whether the assessment point exceeds the risk assessment benchmark specifically includes: determining whether the coordinate point is located within the risk area defined by the risk boundary; when the coordinate point is located within the risk area, it is determined that the assessment point exceeds the risk assessment benchmark.

5. The tool wear control method for machining workpieces prone to high temperatures according to claim 1, characterized in that, The determination of the remaining processing workload from the current moment until the through hole is completed based on the processing progress information specifically includes: The current completed hole depth is obtained from the processing progress information. The remaining axial distance from the current moment to the completion of the through hole is calculated based on the difference between the target hole depth and the current completed hole depth. The remaining axial distance represents the remaining processing workload.

6. The tool wear control method for machining workpieces prone to high temperatures according to claim 5, characterized in that, The through-window is defined as the processing range from the current hole depth to the target hole depth where the distance is less than or equal to a preset window threshold, and the preset window threshold is determined based on the hole diameter; The second determination is triggered only when the remaining axial distance is within the through window.

7. The tool wear control method for machining workpieces prone to high temperatures according to claim 6, characterized in that, The preset window threshold is calculated by multiplying the aperture by a preset coefficient, which is obtained by querying the risk assessment database based on the material type and tool type. When the first judgment characterizes the tool wear risk state but the remaining axial distance is not within the through window, it is directly determined to output a tool change control command.

8. The tool wear control method for machining workpieces prone to high temperatures according to claim 5, characterized in that, The second determination, which compares the remaining processing task volume with the allowed remaining task limit given by the risk assessment database, specifically includes: Compare the remaining axial distance with the upper limit of the allowed remaining tasks; When the remaining axial distance is less than the maximum allowable remaining task, the second determination result is that the through-processing can continue. When the remaining axial distance is greater than or equal to the allowed remaining task limit, the second judgment result is determined to output a tool change control command.

9. A tool wear control device for machining workpieces prone to high temperatures, characterized in that, include: The state quantity generation module is used to generate state quantities that characterize the current machining load during the through hole machining process, based on CNC machining instructions and machining progress information. The risk baseline determination module is used to determine the risk assessment baseline corresponding to the current processing condition from a pre-established risk assessment database. The first judgment module is used to make a first judgment between the state quantity and the risk judgment benchmark to obtain a judgment result on whether the tool wear risk state has been entered. The remaining task quantity determination module is used to determine the remaining machining task quantity from the current moment to the completion of the through hole penetration based on the machining progress information when the first judgment characterization enters the tool wear risk state. The second judgment module is used to make a second judgment between the remaining processing task quantity and the allowed remaining task limit given by the risk judgment database. The decision output module is used to select whether to output a tool change control command or continue to execute through machining based on the second judgment result.

10. A tool wear control device for machining workpieces prone to high temperatures, characterized in that, The tool wear control device for machining workpieces prone to high temperatures includes: a memory and at least one processor, wherein the memory stores instructions; The at least one processor invokes the instructions in the memory to cause the tool wear control device for machining high-temperature workpieces to perform the steps of the tool wear control method for machining high-temperature workpieces as described in any one of claims 1 to 8.

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