Intelligent protection method and system for vertical inverted translation tool magazine

Abstract

The invention relates to the technical field of tool magazines, in particular to a vertical inverted translation tool magazine intelligent protection method and system.The tool magazine of a numerical control machining center is of a combined tool magazine structure of a chain type tool magazine and multiple layers of tool bins, and the chain type tool magazine has the flexibility and efficient tool exchange performance. The quick tool changing response requirement between the chain type tool magazine and the machine tool spindle is met; due to the multiple layers of tool bins, the storage space of tools is effectively increased, and the production environment for processing various materials and executing various machining operations is facilitated; the chain type tool magazine and the multi-layer tool bin detect the real-time tool storage state through mutually independent monitoring systems, tool changing delay between the chain type tool magazine and the multi-layer tool bin is avoided, production interruption is reduced, and production efficiency is improved. The multi-layer tool magazine has the quick response capability of a chain type tool magazine and the large-capacity storage of a multi-layer tool bin, and can quickly respond to complete the tool changing operation for the production conditions of treating various materials and executing various machining operations, so that the continuity of the production process is ensured, and the operation stability of the tool magazine is further enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of tool magazines, and in particular to an intelligent protection method and system for a vertical inverted translational tool magazine. Background Art

[0002] The tool changing device of the tool magazine of the CNC machining center usually adopts a manipulator or a rotary robot arm to complete the selection and replacement of the tool. Although the manipulator has high flexibility and carrying capacity, the complexity of its control system and the precision of its structure not only increase the possibility of failure while causing high costs; the single-arm double-claw rotary robot arm is widely used in the automatic tool changing device of the tool magazine due to its ability to efficiently perform tool retrieval and retracting operations from the tool magazine, as well as its more economical cost advantage compared to traditional manipulators.

[0003] In order to realize the processing operation of complex workpieces, CNC machining centers need to be equipped with a large-capacity tool magazine for storing various types and specifications of tools. The coordinated work of the chain tool magazine and the robotic arm realizes large-capacity tool storage and efficient tool replacement. Considering the safety and stability of the rotary tool retracting and tool changing operation of the robotic arm, a vertical installation structure is generally adopted. However, the direct use of a vertical chain tool magazine in conjunction with it will cause a large expansion of the equipment's footprint.

[0004] In view of the above problems, it is considered to introduce a multi-layer tool magazine design based on the chain tool magazine, and effectively improve the storage density and capacity of the tools by adding tool discs in the vertical direction; although it improves the space utilization of the equipment's footprint, it poses a severe test to the tool replacement mechanism, which will greatly affect the safety and stability of the tool magazine operation.

[0005] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present disclosure, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art known to those skilled in the art. Summary of the invention

[0006] The present invention provides a vertical inverted translational tool magazine intelligent protection method and system, which can effectively solve the problems in the background technology.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is: A vertical inverted translational tool magazine intelligent protection method comprises the following steps: Based on the processing requirements of the CNC center, the parameter information of all tools is counted and a tool database is built; Constructing a first monitoring data set based on the chain tool magazine, collecting tool information of the chain tool magazine through a first detection unit and updating the first monitoring data set; Constructing a digital twin model of the multi-layer tool bin, collecting tool information of the multi-layer tool bin through a second detection unit and constructing a second monitoring data set, and updating tool storage information of the digital twin model at the same time; Associating the tool information of the first monitoring data set and the second monitoring data set with corresponding parameter information in the tool database; determining tool information of a target tool based on the received tool change request signal, and determining position information of the target tool by retrieving the first monitoring data set and the second monitoring data set; The first tool changing mechanism is driven to perform tool changing operations between the main shaft and the chain tool magazine, and the second tool changing mechanism is driven to perform tool changing operations between the chain tool magazine and the multi-layer tool bin.

[0008] Furthermore, the first detection unit collects the coding information of the tools in the chain tool magazine, and associates the corresponding tool holder numbers to obtain the first monitoring data set; The tools in the chain tool magazine are transferred to the multi-layer tool magazine through the second tool changing mechanism, and the coding information of the transferred tools and the tool holder number of the multi-layer tool magazine are associated to obtain the second monitoring data set. The tool storage status and load-bearing status are collected through the second detection unit and the digital twin model is updated.

[0009] Furthermore, the first monitoring data set and the second monitoring data set are both based on the tool type and model determined by parsing the coding information, and respectively establish a first mapping relationship and a second mapping relationship with the tool database; The parameter information in the tool database includes characteristic parameters and process parameters. The characteristic parameters include weight parameters and geometric dimensions of the tool. The geometric dimensions of the tool include length parameters and outer diameter parameters. The process parameters include the use frequency of the tool.

[0010] Furthermore, the digital twin model presets a stratification constraint condition and a tool storage constraint condition based on the process parameters and the characteristic parameters, and the stratification constraint condition and the tool storage constraint condition are both set with multiple threshold intervals; According to the hierarchical constraint conditions, a high-frequency tool-changing layer, a medium-frequency tool-changing layer, a low-frequency tool-changing layer and a spare tool-changing layer are sequentially divided, and each tool-changing layer includes at least one tool storage disc; According to the tool storage constraint conditions, multiple tool storage discs are respectively determined as high-density tool discs, high-distance low-density tool discs, or low-distance low-density tool discs, and each tool storage disc is provided with multiple tool seat numbers.

[0011] Further, in response to the tool storage request signal of the multi-layer tool magazine, characteristic parameters and process parameters of the target tool are determined; Determine one of the high-frequency tool-changing layer, the medium-frequency tool-changing layer, the low-frequency tool-changing layer and the spare tool-changing layer as a target tool-changing layer based on the process parameters of the target tool; Determine a tool storage disc in the target tool change layer as the target tool disc based on the geometric size of the target tool; An empty tool seat in the target tool disc that is closest to the tool changing station is determined as the target tool seat.

[0012] Furthermore, in the process of determining the target tool holder, if none of the tool holders on the target tool disk can satisfy the tool storage condition, the target tool disk and the target tool holder are re-determined after the target tool change layer is downgraded; In the process of determining the target tool seat in the high-distance and low-density tool disc or the low-distance and low-density tool disc, if the tool seats thereon cannot meet the tool storage conditions, the high-density tool disc in the target tool change layer of the same level will be used as the target tool disc, and three consecutive empty tool seats therein will be used as the target tool seats.

[0013] Furthermore, during the updating process of the tool storage information of the digital twin model, the target tool holder on the target tool disc is driven to rotate to the tool changing station; The knife storage state of the target knife seat is detected by a photoelectric sensor arranged near the knife changing station, and the load-bearing state of the target knife disc is detected by a pressure sensor; When it is detected that the tool storage state of the target tool holder changes, the target tool holder is driven away from the tool changing station, and the load-bearing state of the target tool disc is monitored to see whether it changes; If the load-bearing state changes, the tool storage information of the target tool holder in the digital twin model is updated; if the load-bearing state does not change, a fault warning is issued.

[0014] Further, in response to a tool replenishment request signal of the chain tool magazine, the coding information of the tool replenishment on the empty tool holder in the chain tool magazine is determined; The chain tool magazine is preset with a size threshold and a weight threshold based on characteristic parameters of the supplementary tool; If the geometric size of the supplementary tool exceeds the size threshold, the tool holders on both sides of the tool holder corresponding to the supplementary tool are required to remain in an empty tool state; If the weight parameter of the supplementary tool exceeds the weight threshold, the adjacent tool holder on the chain plate adjacent to the tool holder corresponding to the supplementary tool is required to remain in an empty tool state.

[0015] Furthermore, the first tool changing mechanism and the second tool changing mechanism are driven by motors to perform reciprocating linear motion respectively; Collecting the current change of the motor through a current sensor at the motor power line; When it is detected that the current amplitude or waveform of the motor exceeds a preset range, increasing the acquisition frequency of the current sensor; If the current amplitude of the motor continues to increase or the waveform abnormality intensifies, a maintenance request signal is sent.

[0016] A vertical inverted translational tool magazine intelligent protection system, which is adopted in the vertical inverted translational tool magazine intelligent protection method, comprises: Tool parameter management module, used to input parameter information of tools of different types and specifications and build a tool database; A first detection module is used to collect tool information of the chain tool magazine, associate the coding information with the tool holder number of the chain tool magazine and construct a first monitoring data set; The second detection module collects tool information of the multi-layer tool magazine based on the tool information of the chain tool magazine, associates the coding information with the tool holder number of the multi-layer tool magazine and constructs a second monitoring data set; A digital twin module constructs a digital twin model of the multi-layer tool storage, and updates the tool storage information of the digital twin model in response to the second detection module; The protection module optimizes the tool storage process of the multi-layer tool magazine based on the preset hierarchical constraints and tool storage constraints of the tool usage frequency and geometric dimensions, optimizes the tool layout of the chain tool magazine based on the preset size threshold and weight threshold of the tool characteristic parameters, and optimizes the tool change accuracy based on the current sensor at the motor of the tool change mechanism; The control module, in response to different tool change request signals, associates the first detection module, the protection module and the tool parameter management module to control the chain tool magazine to replenish tools, and associates the second detection module, the digital twin module, the protection module and the tool parameter management module to control the multi-layer tool storage tool.

[0017] The beneficial effects of the present invention are: In the present invention, the tool magazine of the CNC machining center adopts a combined tool magazine structure of a vertically mounted chain tool magazine and a vertically mounted multi-layer tool magazine, wherein the vertically mounted chain tool magazine, with its flexibility and efficient tool exchange performance, meets the demand for rapid tool change response between the chain tool magazine and the machine tool spindle; the vertically mounted multi-layer tool magazine effectively increases the storage space for tools, which is convenient for a production environment that processes a variety of materials and performs a variety of machining operations; therefore, the chain tool magazine combined with the multi-layer tool magazine not only improves the storage and exchange efficiency of the tools, but also improves the flexibility of the tool magazine and production continuity.

[0018] The chain tool magazine and the multi-layer tool magazine detect the real-time tool storage status through independent monitoring systems, avoiding tool change delays between the chain tool magazine and the multi-layer tool magazine, reducing production interruptions and improving production efficiency; it has both the rapid response capability of the chain tool magazine and the large-capacity storage of the multi-layer tool magazine. When faced with production situations that process a variety of materials and perform a variety of processing operations, it can respond quickly to complete tool change operations, ensure the continuity of the production process, and thereby enhance the stability of the tool magazine operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the process of the intelligent protection method of the neutral inverted translational tool magazine of the present invention; Figure 2 It is a schematic diagram of the framework of the tool parameter mapping relationship in the present invention; Figure 3 It is a schematic diagram of the optimization process of the multi-layer knife storage knife operation in the present invention; Figure 4 It is a schematic diagram of the process of the multi-layer knife storage method of the present invention; Figure 5 A schematic diagram of a process for updating the knife storage status of the digital twin model in the present invention; Figure 6 It is a schematic diagram of the process of the chain tool magazine tool replenishment method of the present invention. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0024] The present invention discloses a vertical inverted translation tool magazine intelligent protection method and system. Figures 1 to 6 As shown, the tool magazine of the CNC machining center adopts a combined tool magazine structure of a vertically mounted chain tool magazine and a vertically mounted multi-layer tool magazine, wherein the vertically mounted chain tool magazine, with its flexibility and efficient tool exchange performance, meets the rapid tool change response requirements between the chain tool magazine and the machine tool spindle; the vertically mounted multi-layer tool magazine effectively increases the storage space for tools, which is convenient for the production environment that processes a variety of materials and performs a variety of machining operations; therefore, the chain tool magazine combined with the multi-layer tool magazine not only improves the storage and exchange efficiency of the tools, but also improves the flexibility of the tool magazine and production continuity.

[0025] During the production process, the tool changing operation between the spindle and the chain tool magazine, and between the chain tool magazine and the multi-layer tool magazine is realized by the first tool changing mechanism and the second tool changing mechanism respectively. The controller realizes the movement of the motors in the first tool changing mechanism, the second tool changing mechanism, the chain tool magazine and the multi-layer tool magazine by controlling the number and frequency of pulse transmission. Considering that the tool selection action of the tool magazine and the tool changing action of the tool changing mechanism are not performed at the same time, in the actual application process, a controller is generally selected to control multiple motors in time periods. Although it is helpful to reduce hardware costs, the highly integrated control system is not only not suitable for combined tool magazines, but also easily causes tool change delays between tool magazines, affecting production efficiency and posing safety hazards.

[0026] Considering the production requirements of fast, accurate and stable tool changing mechanism, the present invention provides an intelligent protection method for a vertical inverted translation tool magazine, such as Figure 1 As shown, the following steps are included: Based on the processing requirements of the CNC center, the parameter information of all tools is counted and a tool database is built. All tools and their parameter information are entered in advance to facilitate the smooth implementation of temporary tool filling operations during the production process.

[0027] A first monitoring data set is constructed based on the chain tool magazine, and tool information of the chain tool magazine is collected and updated through a first detection unit. The first detection unit is a tool identification device provided corresponding to each tool holder.

[0028] The tool identification device of the present invention adopts a non-contact electromagnetic sensor, and the detection sleeve is set on the tool and is composed of a plurality of magnetic rings and non-magnetic rings. Considering that there are frequent tool changes between the chain tool magazine and the multi-layer tool magazine during the implementation of the present invention, the service life of the contact identification device is short under frequent wear.

[0029] Construct a digital twin model of the multi-layer tool bin, collect tool information of the multi-layer tool bin through the second detection unit and construct a second monitoring data set, and update the tool storage information of the digital twin model at the same time; the digital twin model is constructed before production starts, so the digital twin model at the moment of production startup is mapped with the tool storage information of the actual multi-layer tool bin.

[0030] Considering that the multi-layer tool magazine can expand the number of tool storage discs in the vertical direction according to actual needs to increase the tool capacity, the traditional logic processing circuit that executes tool magazine control cannot be applied to the multi-layer tool magazine with changing capacity. Therefore, the present invention constructs a digital twin model that reflects the real-time tool storage information of the multi-layer tool magazine to accurately control the real-time working conditions of the multi-layer tool magazine.

[0031] The tool information of the first monitoring data set and the second monitoring data set are associated with the corresponding parameter information in the tool database. Considering that the chain tool magazine and the multi-layer tool magazine use different control systems, the monitoring data of the two are stored separately.

[0032] The monitoring data of the chain tool magazine and the multi-layer tool magazine both represent the tool storage information, which will change all the time during the actual production process. Therefore, the simple tool information detected is first constructed into a monitoring data set, and then the relevant parameter information in the pre-built same tool database is associated to ensure the real-time performance of the tool magazine control system and the efficient transmission of information between different tool magazine systems.

[0033] The tool information of the target tool is determined based on the received tool change request signal, and the position information of the target tool is determined by retrieving the first monitoring data set and the second monitoring data set. The tool information of the first monitoring data set and the second monitoring data set of the chain tool magazine and the multi-layer tool magazine includes the specific position coordinates of the tool in the tool magazine.

[0034] The first tool changing mechanism is driven to perform tool changing operations between the spindle and the chain tool magazine, and the second tool changing mechanism is driven to perform tool changing operations between the chain tool magazine and the multi-layer tool magazine. The first tool changing mechanism is used to transfer and retract tools between the spindle and the chain tool magazine, and the second tool changing mechanism is used to transfer and store and retrieve tools between the chain tool magazine and the multi-layer tool magazine.

[0035] In the present invention, the chain tool magazine and the multi-layer tool magazine detect the real-time tool storage status through independent monitoring systems, thereby avoiding tool change delays between the chain tool magazine and the multi-layer tool magazine, reducing production interruptions and improving production efficiency; it has both the rapid response capability of the chain tool magazine and the large-capacity storage of the multi-layer tool magazine, and can quickly respond to complete tool change operations in the face of production situations that process a variety of materials and perform a variety of processing operations, thereby ensuring the continuity of the production process and enhancing the stability of the tool magazine operation.

[0036] Example 1 In this embodiment, if Figure 2 As shown, the coding information of the tools in the chain tool magazine is collected by the first detection unit, and the corresponding tool holder numbers are associated to obtain a first monitoring data set; the tools in the chain tool magazine are transferred to the multi-layer tool magazine by the second tool changing mechanism, and the coding information of the transferred tools and the tool holder numbers of the multi-layer tool magazine are associated to obtain a second monitoring data set, and the tool storage status and load-bearing status are collected by the second detection unit and the digital twin model is updated.

[0037] The first monitoring data set and the second monitoring data set are both based on the tool type and model determined by analyzing the coding information, and respectively establish the first mapping relationship and the second mapping relationship with the tool database; the parameter information in the tool database includes characteristic parameters and process parameters, the characteristic parameters include the weight parameters and geometric dimensions of the tool, the geometric dimensions of the tool include length parameters and outer diameter parameters, and the process parameters include the frequency of use of the tool.

[0038] In the traditional implementation process, based on the simple tool information in the first monitoring data set and the second monitoring data set, the first tool changing mechanism and the second tool changing mechanism can be used to complete the replacement of the target tool on the multi-layer tool magazine with the tool on the machine tool spindle.

[0039] In this embodiment, it is considered to transfer the target tool originally located on the chain tool magazine to the multi-layer tool magazine, and after completing the transfer operation of the target tool, accurately update the tool storage information and the second monitoring data set of the digital twin system; compared with the complexity of detecting the tool information in the multi-layer tool magazine, the operation process of detecting the tool information of the chain tool magazine is simple and direct. Through the tool identification device corresponding to each tool holder, the tool code and tool holder number can be directly collected, and the first monitoring data set can be directly updated.

[0040] When the number of tool storage discs in the multi-layer tool magazine is expanded, the installation of the tool storage discs is simple, and considering that no additional tool storage discs will be added during the production process, and manual tool replenishment will not be performed directly on the tool storage discs, there is no consideration of adding a tool identification device to the newly installed tool storage discs.

[0041] The storage and access information of tools in the multi-layer tool magazine during the production process is updated in real time based on the existing tool information in the digital twin model built before production. Especially in the process of storing tools, it relies on the coding information collected by the first detection unit. While driving the second tool changing mechanism to move the tool to the multi-layer tool magazine, the coding information of the mobile tool is sent to the second monitoring data set and associated with the target tool holder.

[0042] Example 2 like Figure 3 As shown, the digital twin model presets hierarchical constraints and tool storage constraints based on process parameters and characteristic parameters, and both the hierarchical constraints and tool storage constraints are set with multiple threshold intervals; according to the hierarchical constraints, high-frequency tool change layer, medium-frequency tool change layer, low-frequency tool change layer and spare tool change layer are divided in sequence, and each tool change layer includes at least one tool storage disc; according to the tool storage constraints, multiple tool storage discs are respectively determined as high-density tool discs or high-distance low-density tool discs or low-distance low-density tool discs, and each tool storage disc is provided with multiple tool seat numbers.

[0043] like Figure 4 As shown, in response to the tool storage request signal of the multi-layer tool magazine, the characteristic parameters and process parameters of the target tool are determined; based on the process parameters of the target tool, one of the high-frequency tool change layer, the medium-frequency tool change layer, the low-frequency tool change layer and the spare tool change layer is determined as the target tool change layer; based on the geometric dimensions of the target tool, a tool storage disc in the target tool change layer is determined as the target tool disc; and the empty tool seat closest to the tool change station in the target tool disc is determined as the target tool seat.

[0044] In the specific implementation process, the storage position of the tool is related to the tool change response time of the machine tool spindle. Therefore, the present invention determines the use frequency of different tools according to the process parameters of the CNC center, and determines the storage layout of the tools in the multi-layer tool bin according to the use frequency.

[0045] The storage layout of the tool is also related to the tool's own external dimensions. Tools with larger sizes need to consider not only the collision and interference with adjacent stored tools, but also the collision and interference with the upper and lower tool storage discs. Therefore, it is also necessary to select a suitable storage disc based on the tool's own geometric dimensions to reduce the risk of collision during tool placement.

[0046] In this embodiment, firstly, multiple tool storage discs in the multi-layer tool bin are determined as storage targets according to the frequency of use of the tools, that is, tools with high frequency of use are planned to the high-frequency tool change layer, tools with low frequency of use are planned to the low-frequency tool change layer, and the spare tool change layer is selected in case of special tools or insufficient capacity; secondly, a tool storage disc is determined as the storage target according to the geometric dimensions of the tools, that is, large outer diameter tools are planned to low-pitch and low-density tool discs, and large outer diameter and long tools are planned to high-pitch and low-density tool discs, and tools within the regular size range are stored in the high-density tool disc; after the target tool disc is determined, the empty tool holder on the target tool disc is selected as the target tool holder.

[0047] Example 3 As a preferred embodiment of the above-mentioned embodiment 2, in the process of determining the target tool seat, if none of the tool seats on the target tool disc can meet the tool storage condition, the target tool change layer will be downgraded and the target tool disc and the target tool seat will be re-determined; in the process of determining the target tool seat in a high-distance and low-density tool disc or a low-distance and low-density tool disc, if none of the tool seats thereon can meet the tool storage condition, the high-density tool disc in the target tool change layer of the same level will be used as the target tool disc, and three consecutive empty tool seats therein will be used as the target tool seats.

[0048] For tools with larger geometric dimensions, small-density tool discs are preferred in the target tool change layer, followed by large-density tool discs. Considering that the number of tool holders on a small-density tool disc is much less than that on a large-density tool disc, after the tool storage capacity of the small-density tool disc reaches the limit, tools with larger geometric dimensions are planned to the large-density tool disc. However, to avoid collisions, after determining the target tool holder, it is necessary to ensure that the tool holders on both sides of the adjacent tool holder remain empty.

[0049] Example 4 like Figure 5 As shown, considering that there is a tool changing error between the second tool changing mechanism and the multi-layer tool magazine, and the tool holder in the multi-layer tool magazine does not have a direct detection method, during the tool storage information update process of the digital twin model, the target tool holder on the target tool disc is driven to rotate to the tool changing station; the tool storage state of the target tool holder is detected by a photoelectric sensor arranged close to the tool changing station, and the load-bearing state of the target tool disc is detected by a pressure sensor; when it is monitored that the tool storage state of the target tool holder has changed, the target tool holder is driven away from the tool changing station, and the load-bearing state of the target tool disc is monitored for changes; if the load-bearing state changes, the tool storage information of the target tool holder in the digital twin model is updated, and if the load-bearing state has not changed, a fault warning is issued.

[0050] During the specific implementation process, a photoelectric sensor is provided for each tool storage disc in the multi-layer tool magazine, and the photoelectric sensor is located at the tool changing station; when the second tool changing mechanism moves the target tool to the changing station of the target tool disc, the target tool holder of the target tool disc is driven to rotate to the changing station, and the photoelectric sensor outputs an empty tool state at this time; after the storage operation of the target tool is completed, the photoelectric sensor outputs a tool storage state and drives the target tool holder away from the tool changing station; if the target tool holder recorded as the tool storage state is away from the tool changing station, the load-bearing state of the target tool disc increases with the storage of the target tool, which indicates that the tool storage is successful, and the tool storage information is updated to the digital twin model and the second monitoring data set.

[0051] Furthermore, the weight of a tool is usually a relatively stable parameter. For a tool of a certain type and model, its weight should be within a certain tolerance range. This embodiment can accurately measure the weight of the tool by setting a high-precision weighing sensor, and then determine whether the tool may be damaged or worn. After determining the target tool, a replacement request signal is sent. After the replacement is completed, by comparing the first monitoring data set with the second monitoring data set, it can be determined whether the replacement tool is correct. If the comparison results are the same, it means that the replacement is completed. If the comparison results are different, it means that the replacement process fails.

[0052] Example 5 When the machining operation of the CNC center changes, it may be necessary to supplement the existing tool storage capacity of the tool magazine. Without affecting normal production, the overall tool storage capacity of the tool magazine can be supplemented by manually adding tools to the chain tool magazine.

[0053] Specifically, Figure 6 As shown, in response to the tool replenishment request signal of the chain tool magazine, the coding information of the supplementary tool on the empty tool holder in the chain tool magazine is determined; the chain tool magazine is preset with a size threshold and a weight threshold based on the characteristic parameters of the supplementary tool; if the geometric size of the supplementary tool exceeds the size threshold, the adjacent tool holders on both sides of the tool holder corresponding to the supplementary tool are required to remain in an empty tool state; if the weight parameter of the supplementary tool exceeds the weight threshold, the adjacent tool holders on the adjacent chain plates of the tool holder corresponding to the supplementary tool are required to remain in an empty tool state.

[0054] In the specific implementation process, considering that tools with larger geometric dimensions may collide with tools in adjacent tool holders after being stored in the tool holder of the chain tool magazine, it is necessary to ensure that the tool holders on both sides of the target tool holder remain empty after determining the target tool holder to avoid collisions between tools.

[0055] Furthermore, considering that the structure of the chain tool magazine is that two tool holders are installed on one chain plate, and the two adjacent connecting plates are rotatably connected, when the adjacent tool holders on the two adjacent chain plates are installed with large-mass tools, it will cause the local load-bearing load on the entire chain to be too large, which may cause the chain to vibrate and shake during high-speed tool changing, thereby affecting the positioning accuracy of the chain tool magazine.

[0056] Therefore, in this embodiment, if the weight parameter of the supplementary tool exceeds the weight threshold of the target tool holder, it is necessary to ensure that the target tool holder is adjacent to the tool holder and that the tool holder is located on the adjacent chain plate to maintain an empty tool state and reduce the risk of the transmission chain shaking due to excessive local load.

[0057] Example 6 Considering that the tool changing operation between the chain tool magazine and the multi-layer tool magazine is relatively frequent, and the first tool changing mechanism and the second tool changing mechanism are both driven by motors to perform reciprocating linear motion, the operating state of the motor will directly affect the accuracy of the tool changing operation, so maintenance is required before the motor fails.

[0058] Specifically, the current changes of the motor are collected by the current sensor at the motor power line; when the motor current amplitude or waveform is monitored to exceed the preset range, the collection frequency of the current sensor is increased; if the motor current amplitude continues to increase or the waveform abnormality worsens, a maintenance request signal is sent.

[0059] A current sensor is installed on the power line of the motor to monitor the current changes of the motor in real time, record the current data of the motor, and perform real-time analysis. The preset threshold and alarm mechanism will sound an alarm when the current amplitude or waveform exceeds the set range, reminding the operator to perform inspection and maintenance.

[0060] Example 7 The present invention further discloses a vertical inverted translation tool magazine intelligent protection system, comprising: The tool parameter management module is used to input parameter information of tools of different types and specifications and build a tool database.

[0061] The first detection module is used to collect tool information of the chain tool magazine, associate the coding information with the tool holder number of the chain tool magazine and construct a first monitoring data set.

[0062] The second detection module collects tool information of the multi-layer tool magazine based on the tool information of the chain tool magazine, associates the coding information with the tool holder number of the multi-layer tool magazine and constructs a second monitoring data set.

[0063] The digital twin module constructs a digital twin model of the multi-layer tool storage bin and updates the tool storage information of the digital twin model in response to the second detection module.

[0064] The protection module optimizes the tool storage process of the multi-layer tool magazine based on the preset hierarchical constraints and storage constraints of the tool usage frequency and geometric dimensions, optimizes the tool layout of the chain tool magazine based on the preset size threshold and weight threshold of the tool's characteristic parameters, and optimizes the tool changing accuracy based on the current sensor at the motor of the tool changing mechanism.

[0065] The control module, in response to different tool change request signals, associates the first detection module, the protection module and the tool parameter management module to control the chain tool magazine to replenish tools, and associates the second detection module, the digital twin module, the protection module and the tool parameter management module to control the multi-layer tool storage tool.

[0066] Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and improvements, which are within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A vertical inverted translation tool magazine intelligent protection method, characterized in that: The following steps are involved: Based on the processing requirements of the CNC center, the parameter information of all tools is counted and a tool database is built; Constructing a first monitoring data set based on the chain tool magazine, collecting tool information of the chain tool magazine through a first detection unit and updating the first monitoring data set; Constructing a digital twin model of a multi-layer tool bin, collecting tool information of the multi-layer tool bin through a second detection unit and constructing a second monitoring data set, and updating tool storage information of the digital twin model at the same time; Associating the tool information of the first monitoring data set and the second monitoring data set with corresponding parameter information in the tool database; determining tool information of a target tool based on the received tool change request signal, and determining position information of the target tool by retrieving the first monitoring data set and the second monitoring data set; Drive the first tool changing mechanism to perform tool changing operation between the spindle and the chain tool magazine, and drive the second tool changing mechanism to perform tool changing operation between the chain tool magazine and the multi-layer tool magazine; The first detection unit collects the coding information of the tools in the chain tool magazine and associates the corresponding tool holder numbers to obtain the first monitoring data set; The tool in the chain tool magazine is transferred to the multi-layer tool bin by the second tool changing mechanism, the coding information of the transferred tool and the tool holder number of the multi-layer tool bin are associated to obtain the second monitoring data set, the tool storage state and the load-bearing state are collected by the second detection unit, and the digital twin model is updated; The first monitoring data set and the second monitoring data set are both based on the tool type and model determined by analyzing the coding information, and respectively establish a first mapping relationship and a second mapping relationship with the tool database; The parameter information in the tool database includes characteristic parameters and process parameters. The characteristic parameters include weight parameters and geometric dimensions of the tool. The geometric dimensions of the tool include length parameters and outer diameter parameters. The process parameters include the use frequency of the tool.

2. The intelligent protection method for a vertical inverted translational tool magazine according to claim 1 is characterized in that: The digital twin model presets a stratification constraint condition and a tool storage constraint condition based on the process parameters and the characteristic parameters, and the stratification constraint condition and the tool storage constraint condition are both set with multiple threshold intervals; According to the hierarchical constraint conditions, a high-frequency tool-changing layer, a medium-frequency tool-changing layer, a low-frequency tool-changing layer and a spare tool-changing layer are sequentially divided, and each tool-changing layer includes at least one tool storage disc; According to the tool storage constraint conditions, multiple tool storage discs are respectively determined as high-density tool discs, high-distance low-density tool discs, or low-distance low-density tool discs, and each tool storage disc is provided with multiple tool seat numbers.

3. The intelligent protection method for the vertical inverted translational tool magazine according to claim 2 is characterized in that: In response to a tool storage request signal of the multi-layer tool magazine, determining characteristic parameters and process parameters of the target tool; Determine one of the high-frequency tool-changing layer, the medium-frequency tool-changing layer, the low-frequency tool-changing layer and the spare tool-changing layer as a target tool-changing layer based on the process parameters of the target tool; Determine a tool storage disc in the target tool change layer as the target tool disc based on the geometric size of the target tool; An empty tool seat in the target tool disc that is closest to the tool changing station is determined as the target tool seat.

4. The intelligent protection method for the vertical inverted translational tool magazine according to claim 3 is characterized in that: In the process of determining the target tool holder, if none of the tool holders on the target tool disk can meet the tool storage condition, the target tool disk and the target tool holder are re-determined after the target tool change layer is downgraded; In the process of determining the target tool seat in the high-distance and low-density tool disc or the low-distance and low-density tool disc, if the tool seats thereon cannot meet the tool storage conditions, the high-density tool disc in the target tool change layer of the same level will be used as the target tool disc, and three consecutive empty tool seats therein will be used as the target tool seats.

5. The intelligent protection method for the vertical inverted translational tool magazine according to claim 1 is characterized in that: During the tool storage information update process of the digital twin model, driving the target tool holder on the target tool disc to rotate to a tool changing station; The knife storage state of the target knife seat is detected by a photoelectric sensor arranged near the knife changing station, and the load-bearing state of the target knife disc is detected by a pressure sensor; When it is detected that the tool storage state of the target tool holder changes, the target tool holder is driven away from the tool changing station, and the load-bearing state of the target tool disc is monitored to see whether it changes; If the load-bearing state changes, the tool storage information of the target tool holder in the digital twin model is updated; if the load-bearing state does not change, a fault warning is issued.

6. The intelligent protection method for a vertical inverted translational tool magazine according to claim 1 is characterized in that: In response to a tool replenishment request signal of the chain tool magazine, determining coding information of a tool to be replenished on an empty tool holder in the chain tool magazine; The chain tool magazine is preset with a size threshold and a weight threshold based on characteristic parameters of the supplementary tool; If the geometric size of the supplementary tool exceeds the size threshold, the tool holders on both sides of the tool holder corresponding to the supplementary tool are required to remain in an empty tool state; If the weight parameter of the supplementary tool exceeds the weight threshold, the adjacent tool holder on the chain plate adjacent to the tool holder corresponding to the supplementary tool is required to remain in an empty tool state.

7. The intelligent protection method for a vertical inverted translational tool magazine according to claim 1 is characterized in that: The first tool changing mechanism and the second tool changing mechanism are both driven by a motor to perform reciprocating linear motion; Collecting the current change of the motor through a current sensor at the motor power line; When it is detected that the current amplitude or waveform of the motor exceeds a preset range, increasing the acquisition frequency of the current sensor; If the current amplitude of the motor continues to increase or the waveform abnormality intensifies, a maintenance request signal is sent.

8. A vertical inverted translation tool magazine intelligent protection system, characterized in that: The vertical inverted translational tool magazine intelligent protection method according to any one of claims 1 to 7 is characterized by comprising: Tool parameter management module, used to input parameter information of tools of different types and specifications and build a tool database; A first detection module is used to collect tool information of the chain tool magazine, associate the coding information with the tool holder number of the chain tool magazine and construct a first monitoring data set; The second detection module collects tool information of the multi-layer tool magazine based on the tool information of the chain tool magazine, associates the coding information with the tool holder number of the multi-layer tool magazine and constructs a second monitoring data set; A digital twin module constructs a digital twin model of the multi-layer tool storage, and updates the tool storage information of the digital twin model in response to the second detection module; The protection module optimizes the tool storage process of the multi-layer tool magazine based on the preset hierarchical constraints and tool storage constraints of the tool usage frequency and geometric dimensions, optimizes the tool layout of the chain tool magazine based on the preset size threshold and weight threshold of the tool characteristic parameters, and optimizes the tool change accuracy based on the current sensor at the motor of the tool change mechanism; The control module, in response to different tool change request signals, associates the first detection module, the protection module and the tool parameter management module to control the chain tool magazine to replenish tools, and associates the second detection module, the digital twin module, the protection module and the tool parameter management module to control the multi-layer tool storage tool.

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