An intelligent protection method and system for a vertical inverted translation tool magazine

Abstract

The present invention relates to the technical field of tool magazines, and particularly to an intelligent protection method and system for a vertical inverted translation tool magazine. Among them, the tool magazine of a numerical control machining center adopts a combined tool magazine structure of a chain-type tool magazine and a multi-layer tool magazine. The chain-type tool magazine, with its flexibility and high-efficiency tool change performance, meets the rapid tool change response requirements between the chain-type tool magazine and the machine tool spindle; the multi-layer tool magazine effectively increases the tool storage space, facilitating the production environment for processing multiple materials and performing multiple machining operations; the chain-type tool magazine and the multi-layer tool magazine detect the real-time tool storage state through independent monitoring systems, avoiding tool change delays between the chain-type tool magazine and the multi-layer tool magazine, reducing production interruptions and improving production efficiency; with both the rapid response ability of the chain-type tool magazine and the large-capacity storage of the multi-layer tool magazine, in the face of production situations involving processing multiple materials and performing multiple machining operations, it can quickly respond to complete the tool change operation, ensuring the continuity of the production process, and thus enhancing the stability of the tool magazine operation.

Description

Technical Field

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

[0002] The tool change device of a numerical control machining center usually uses a manipulator or a rotary robotic arm to complete the selection and replacement of tools. Although the manipulator has high flexibility and load-bearing capacity, the complexity of its control system and the precision of its structure result in high costs and an increased likelihood of failures. The single-arm double-claw rotary robotic arm is widely used in the automatic tool change device of the tool magazine due to its ability to efficiently perform tool picking and retracting operations from the tool magazine and its cost advantage compared to traditional manipulators.

[0003] To achieve the machining operations of complex workpieces, a numerical control machining center needs to be equipped with a large-capacity tool magazine for storing various types and specifications of tools. The coordinated work of a chain-type tool magazine and a robotic arm realizes large-capacity tool storage and efficient tool replacement. Considering the safety and stability of the rotary tool retracting and changing operations of the robotic arm, a vertical installation structure is generally adopted. However, directly using a vertical chain-type tool magazine in cooperation with it will result in an increase in the floor area of the equipment.

[0004] In view of the above problems, it is considered to introduce a multi-layer tool magazine design based on the chain-type tool magazine, which effectively improves the storage density and capacity of tools by adding tool disks in the vertical direction. Although the space utilization rate of the equipment floor area is improved, it poses a severe test to the tool replacement mechanism and will greatly affect the safety and stability of the tool magazine operation.

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

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

[0007] To achieve the above object, the technical solution adopted by the present invention is:

[0008] An intelligent protection method for a vertical inverted translation tool magazine includes the following steps:

[0009] Based on the machining requirements of the numerical control center, statistically analyze the parameter information of all tools and construct a tool database;

[0010] Based on the chain-type tool magazine, construct a first monitoring data set, and collect the tool information of the chain-type tool magazine through a first detection unit and update the first monitoring data set;

[0011] Construct a digital twin model of the multi-layer tool magazine, collect tool information of the multi-layer tool magazine through a 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;

[0012] Associate the tool information in the first monitoring data set and the second monitoring data set with the corresponding parameter information in the tool database;

[0013] Based on the received tool change request signal, determine the tool information of the target tool, and determine the position information of the target tool by retrieving the first monitoring data set and the second monitoring data set;

[0014] Drive the first tool change mechanism to perform the tool change operation between the spindle and the chain tool magazine, and drive the second tool change mechanism to perform the tool change operation between the chain tool magazine and the multi-layer tool magazine.

[0015] Furthermore, collect the coding information of the tools in the chain tool magazine through the first detection unit, and associate the corresponding tool holder numbers to obtain the first monitoring data set;

[0016] Transfer the tools in the chain tool magazine to the multi-layer tool magazine through the second tool change mechanism, associate the coding information of the transferred tools with the tool holder numbers of the multi-layer tool magazine to obtain the second monitoring data set, and collect the tool storage state and load-bearing state through the second detection unit and update the digital twin model.

[0017] Furthermore, the first monitoring data set and the second monitoring data set respectively establish a first mapping relationship and a second mapping relationship with the tool database based on the tool type numbers determined by parsing the coding information;

[0018] The parameter information in the tool database includes characteristic parameters and process parameters. The characteristic parameters include the weight parameter and geometric dimensions of the tool. The geometric dimensions of the tool include the length parameter and outer diameter parameter. The process parameters include the usage frequency of the tool.

[0019] Furthermore, the digital twin model presets hierarchical constraint conditions and tool storage constraint conditions based on the process parameters and the characteristic parameters. Both the hierarchical constraint conditions and the tool storage constraint conditions are set with multiple threshold intervals;

[0020] According to the hierarchical constraint conditions, divide into a high-frequency tool change layer, a medium-frequency tool change layer, a low-frequency tool change layer and a spare tool change layer in sequence, and each tool change layer includes at least one tool storage disc;

[0021] According to the tool storage constraint conditions, determine multiple tool storage discs as large-density tool discs or high-distance small-density tool discs or low-distance small-density tool discs respectively, and each tool storage disc is provided with multiple tool holder numbers.

[0022] Further, in response to the tool storage request signal of the multi-layer tool magazine, determine the characteristic parameters and process parameters of the target tool;

[0023] Based on the process parameters of the target tool, determine 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 as the target tool change layer;

[0024] Based on the geometric dimensions of the target tool, determine one of the tool storage discs in the target tool change layer as the target tool disc;

[0025] Determine the empty tool seat closest to the tool change station on the target tool disc as the target tool seat.

[0026] Further, during the determination process of the target tool seat, if the tool seats on the target tool disc cannot meet the tool storage conditions, downgrade the target tool change layer and then re-determine the target tool disc and the target tool seat;

[0027] During the determination process of the target tool seat in the high-distance small-density tool disc or the low-distance small-density tool disc, if the tool seats on it cannot meet the tool storage conditions, use the large-density tool disc in the same-level target tool change layer as the target tool disc, and use three consecutive empty tool seats as the target tool seats.

[0028] Further, during the update process of the tool storage information in the digital twin model, drive the target tool seat on the target tool disc to rotate to the tool change station;

[0029] Detect the tool storage state of the target tool seat through a photoelectric sensor arranged near the tool change station, and detect the load-bearing state of the target tool disc through a pressure sensor;

[0030] When it is monitored that the tool storage state of the target tool seat changes, drive the target tool seat away from the tool change station, and monitor whether the load-bearing state of the target tool disc changes;

[0031] If the load-bearing state changes, update the tool storage information of the target tool seat in the digital twin model. If the load-bearing state does not change, issue a fault warning.

[0032] Further, in response to the tool replenishment request signal of the chain-type tool magazine, determine the coding information of the tool to be replenished on the empty tool seat of the chain-type tool magazine;

[0033] The chain-type tool magazine presets a size threshold and a weight threshold based on the characteristic parameters of the replenished tool;

[0034] If the geometric dimensions of the replenished tool exceed the size threshold, require the adjacent two tool seats on the tool seat corresponding to the replenished tool to remain empty;

[0035] If the weight parameter of the replenished tool exceeds the weight threshold, it is required that the adjacent tool holders on the adjacent link plates of the tool holder corresponding to the replenished tool remain empty.

[0036] Furthermore, both the first tool changing mechanism and the second tool changing mechanism are respectively driven by motors to perform reciprocating linear motion;

[0037] Collect the current change of the motor through the current sensor at the motor power line;

[0038] When it is monitored that the current amplitude or waveform of the motor exceeds the preset range, increase the acquisition frequency of the current sensor;

[0039] If the current amplitude of the motor continues to increase or the waveform anomaly intensifies, send a maintenance request signal.

[0040] A vertical inverted translation tool magazine intelligent protection system, which adopts the above-mentioned vertical inverted translation tool magazine intelligent protection method, includes:

[0041] A tool parameter management module, which is used to input the parameter information of different types and specifications of tools and construct a tool database;

[0042] A first detection module, which is used to collect the tool information of the chain tool magazine, associate the coding information and the tool holder number of the chain tool magazine and construct a first monitoring data set;

[0043] A second detection module, which collects the tool information of multiple-layer tool magazines based on the tool information of the chain tool magazine, associates the coding information and the tool holder number of the multiple-layer tool magazines and constructs a second monitoring data set;

[0044] A digital twin module, which constructs a digital twin model of the multiple-layer tool magazine and updates the tool storage information of the digital twin model in response to the second detection module;

[0045] A protection module, which optimizes the tool storage process of the multiple-layer tool magazine based on the hierarchical constraint conditions and tool storage constraint conditions preset according to the usage frequency and geometric dimensions of the tools, optimizes the tool layout of the chain tool magazine based on the size threshold and weight threshold preset according to the characteristic parameters of the tools, and optimizes the tool changing accuracy based on the current sensor at the tool changing mechanism motor;

[0046] A control module, which, in response to different tool changing request signals, associates the first detection module, the protection module and the tool parameter management module to control the tool replenishment of the chain tool magazine, and associates the second detection module, the digital twin module, the protection module and the tool parameter management module to control the tool storage of the multiple-layer tool magazine.

[0047] The beneficial effects of the present invention are:

[0048] In the present invention, the tool magazine of the CNC machining center adopts a combined tool magazine structure of a vertically installed chain-type tool magazine and a vertically installed multi-layer tool magazine. Among them, the vertically installed chain-type tool magazine, with its flexibility and high-efficiency tool change performance, meets the rapid tool change response requirements between the chain-type tool magazine and the machine tool spindle; the vertically installed multi-layer tool magazine effectively increases the tool storage space, facilitating the production environment for processing a variety of materials and performing a variety of machining operations; therefore, the combination of the chain-type tool magazine and the multi-layer tool magazine not only improves the tool storage and exchange efficiency, but also enhances the flexibility and production continuity of the tool magazine.

[0049] The chain-type 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-type tool magazine and the multi-layer tool magazine, reducing production interruptions and improving production efficiency; with both the rapid response ability of the chain-type tool magazine and the large-capacity storage of the multi-layer tool magazine, in the face of production situations involving processing a variety of materials and performing a variety of machining operations, it can quickly respond to complete the tool change operation, ensuring the continuity of the production process, and thus enhancing the stability of the tool magazine operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0051] Figure 1 It is a flow schematic diagram of the intelligent protection method for the vertically inverted translation tool magazine in the present invention;

[0052] Figure 2 It is a framework schematic diagram of the tool parameter mapping relationship in the present invention;

[0053] Figure 3 It is an optimized schematic diagram of the tool storage operation process in the multi-layer tool magazine of the present invention;

[0054] Figure 4 It is a flow schematic diagram of the tool storage method in the multi-layer tool magazine of the present invention;

[0055] Figure 5 It is a flow schematic diagram of the digital twin model updating the tool storage status in the present invention;

[0056] Figure 6 It is a flow schematic diagram of the tool replenishment method for the chain-type tool magazine in the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0057] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0058] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manner.

[0059] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the specification of the present invention herein 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 of the related listed items.

[0060] The present invention discloses an intelligent protection method and system for a vertical inverted translation tool magazine. As Figures 1 to 6 shown, the tool magazine of the numerical control machining center adopts a combined tool magazine structure of a vertically installed chain tool magazine and a vertically installed multi-layer tool magazine. Among them, the vertically installed chain tool magazine, with its flexibility and high-efficiency tool change performance, meets the rapid tool change response requirements between the chain tool magazine and the machine tool spindle; the vertically installed multi-layer tool magazine effectively increases the tool storage space and is convenient for a production environment that processes multiple materials and performs multiple machining operations; therefore, the combination of the chain tool magazine and the multi-layer tool magazine not only improves the tool storage and exchange efficiency, but also improves the flexibility and production continuity of the tool magazine.

[0061] During the production process, the tool change operations between the spindle and the chain tool magazine, and between the chain tool magazine and the multi-layer tool magazine are respectively realized through the first tool change mechanism and the second tool change mechanism. The controller realizes the movement of the motors in the first tool change mechanism, the second tool change mechanism, the chain tool magazine and the multi-layer tool magazine by controlling the number and frequency of pulse transmissions. Considering that the tool selection action of the tool magazine and the tool change action of the tool change mechanism do not occur simultaneously, in actual application, generally one controller is selected to control multiple motors in different time periods. Although it is beneficial to reduce the hardware cost, the high-integration control system is not only not applicable to the combined tool magazine, but also easily causes tool change delays between tool magazines, affecting production efficiency and there are also potential safety hazards.

[0062] Considering the production requirements of fast, accurate and stable tool change mechanisms, the present invention provides an intelligent protection method for a vertical inverted translation tool magazine. As Figure 1 shown, it includes the following steps:

[0063] Based on the processing requirements of the numerical control center, the parameter information of all tools is statistically analyzed and a tool database is constructed. All tools and their parameter information are entered in advance to facilitate the smooth progress of the temporary tool replenishment operation during the production process.

[0064] Based on the chain-type tool magazine, a first monitoring data set is constructed. The tool information of the chain-type tool magazine is collected by the first detection unit and the first monitoring data set is updated. The first detection unit is a tool identification device set corresponding to each tool holder.

[0065] In the present invention, the tool identification device adopts a non-contact electromagnetic inductor to detect the unique tool code formed by a plurality of magnetic conductive rings and non-magnetic conductive rings sleeved on the tool. Considering that there are frequent tool changing operations between the chain-type tool magazine and the multi-layer tool magazine during the implementation process of the present invention, the service life of the contact-type identification device is relatively short under frequent wear.

[0066] A digital twin model of the multi-layer tool magazine is constructed. The tool information of the multi-layer tool magazine is collected by the second detection unit and a second monitoring data set is constructed. At the same time, the tool storage information of the digital twin model is updated; the construction of the digital twin model is carried out before the production is started. Therefore, the tool storage information of the actual multi-layer tool magazine is mapped in the digital twin model at the moment of starting production.

[0067] Considering that the multi-layer tool magazine can expand the number of tool storage disks in its vertical direction according to actual needs, thereby increasing the tool capacity. Therefore, the traditional logic processing circuit for controlling the tool magazine is not applicable to the multi-layer tool magazine with variable capacity. Therefore, the present invention constructs a digital twin model reflecting 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.

[0068] The tool information in the first monitoring data set and the second monitoring data set is associated with the corresponding parameter information in the tool database. Considering that the chain-type tool magazine and the multi-layer tool magazine adopt different control systems, the monitoring data of the two are stored separately.

[0069] The monitoring data of the chain-type tool magazine and the multi-layer tool magazine both represent the tool storage information, which will change at any time during the actual production process. Therefore, the simple tool information detected is first used to construct a monitoring data set, and then it is associated with the relevant parameter information in the same pre-constructed tool database to ensure the real-time performance of the tool magazine control system and the efficient transmission of information between different tool magazine systems.

[0070] Based on the received tool change request signal, the tool information of the target tool is determined. 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 in the first monitoring data set and the second monitoring data set of the chain-type tool magazine and the multi-layer tool magazine includes the specific position coordinates of the tool in the tool magazine.

[0071] Drive the first tool change mechanism to perform tool change operations between the spindle and the chain-type tool magazine, drive the second tool change mechanism to perform tool change operations between the chain-type tool magazine and the multi-layer tool magazine, transfer and retract tools between the spindle and the chain-type tool magazine through the first tool change mechanism, and transfer and store / retrieve tools between the chain-type tool magazine and the multi-layer tool magazine through the second tool change mechanism.

[0072] In the present invention, the chain-type 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-type tool magazine and the multi-layer tool magazine, reducing production interruptions and improving production efficiency; combining the fast response ability of the chain-type tool magazine and the large-capacity storage of the multi-layer tool magazine, in the face of production situations involving processing multiple materials and performing multiple machining operations, it can quickly respond to complete tool change operations, ensuring the continuity of the production process, and thus enhancing the stability of the tool magazine operation.

[0073] Embodiment 1

[0074] In this embodiment, as Figure 2 shown, collect the coding information of the tools in the chain-type tool magazine through the first detection unit, and associate the corresponding tool holder numbers to obtain the first monitoring data set; transfer the tools in the chain-type tool magazine to the multi-layer tool magazine through the second tool change mechanism, associate the coding information of the transferred tools and the tool holder numbers of the multi-layer tool magazine to obtain the second monitoring data set, and collect the tool storage status and load-bearing status through the second detection unit and update the digital twin model.

[0075] Both the first monitoring data set and the second monitoring data set establish the first mapping relationship and the second mapping relationship with the tool database respectively based on the tool type numbers determined by parsing the coding information; 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 tools, the geometric dimensions of the tools include length parameters and outer diameter parameters, and the process parameters include the usage frequency of the tools.

[0076] In the traditional implementation process, based on the simple tool information in the first monitoring data set and the second monitoring data set, and in cooperation with the first tool change mechanism and the second tool change mechanism, the replacement of the target tool on the multi-layer tool magazine and the tool on the machine tool spindle can be completed.

[0077] In this embodiment, it is considered to transfer the target tool originally located on the chain-type tool magazine to the multi-layer tool magazine, and after completing the transfer operation of the target tool, accurately update the tool storage information of the digital twin system and the second monitoring data set; compared with the complexity of detecting the tool information in the multi-layer tool magazine, the operation process of detecting the tool information in the chain-type tool magazine is simple and direct. Through the tool identification device set for each tool holder, the tool coding and tool holder number can be directly collected, and the first monitoring data set can be directly updated.

[0078] When the number of tool storage discs in the multi-layer tool magazine is expanded, the erection operation of the tool storage discs is simple. Considering that no tool storage discs will be added during the production process and no manual tool replenishment will be directly carried out on the tool storage discs, no tool identification device is considered to be added to the newly erected tool storage discs.

[0079] During the production process of the multi-layer tool magazine, the access information of the tools is updated in real time based on the existing tool information in the digital twin model constructed before production. Especially during the process of storing tools, relying on the encoded information collected by the first detection unit, during the process of driving the second tool change mechanism to move the tool to the multi-layer tool magazine, the encoded information of the moving tool is simultaneously sent to the second monitoring data set and associated with the target tool seat.

[0080] Embodiment 2

[0081] As Figure 3 shown, the digital twin model presets hierarchical constraint conditions and tool storage constraint conditions based on process parameters and feature parameters. Both the hierarchical constraint conditions and the tool storage constraint conditions are set with multiple threshold intervals; according to the hierarchical constraint conditions, the high-frequency tool change layer, the medium-frequency tool change layer, the low-frequency tool change layer, and the spare tool change layer are sequentially divided, and each tool change 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 or high-distance low-density tool discs or low-distance low-density tool discs, and each tool storage disc is set with multiple tool seat numbers.

[0082] As Figure 4 shown, in response to the tool storage request signal of the multi-layer tool magazine, the feature 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, one tool storage disc in the target tool change layer is determined as the target tool disc; the empty tool seat in the target tool disc that is closest to the tool change station is determined as the target tool seat.

[0083] In the specific implementation process, the storage location of the tool is related to the tool change response time of the machine tool spindle. Therefore, the present invention determines the usage frequency of different tools according to the process parameters of the numerical control center, and determines the storage layout of the tools in the multi-layer tool magazine according to the usage frequency.

[0084] The storage layout of the tools is also related to the external dimensions of the tools themselves. Larger-sized tools not only need to consider the collision interference problem with adjacent stored tools, but also need to consider the collision interference problem with the upper and lower tool storage discs. Therefore, it is also necessary to select a suitable tool storage disc for storage according to the geometric dimensions of the tools themselves to reduce the risk of collision during the tool picking and placing process.

[0085] In this embodiment, first, multiple tool storage disks in the multi-layer tool magazine are determined as storage targets according to the usage frequency of the tools, that is, the tools with high usage frequency are planned to the high-frequency tool change layer, and the tools with low usage frequency are planned to the low-frequency tool change layer. In the case of special tools or insufficient capacity, the spare tool change layer is selected. Secondly, a tool storage disk is determined as the storage target according to the geometric dimensions of the tools, that is, the tools with large outer diameters are planned to the low-distance and low-density tool disks, the tools with large outer diameters and long lengths are planned to the high-distance and low-density tool disks, and the tools within the conventional size range are stored in the high-density tool disks. After the target tool disk is determined, an empty tool seat on the target tool disk is selected as the target tool seat.

[0086] Embodiment 3

[0087] As an optimization of the above Embodiment 2, during the determination of the target tool seat, if the tool seats on the target tool disk cannot meet the tool storage conditions, the target tool change layer is downgraded and then the target tool disk and the target tool seat are re-determined; during the determination of the target tool seat in the high-distance and low-density tool disk or the low-distance and low-density tool disk, if the tool seats on them cannot meet the tool storage conditions, the high-density tool disk in the same-level target tool change layer is used as the target tool disk, and three consecutive empty tool seats among them are used as the target tool seats.

[0088] For tools with relatively large geometric dimensions, small-density tool disks are preferred in the target tool change layer, and large-density tool disks are selected secondly. Considering that the number of tool seats on the small-density tool disk is much less than that on the large-density tool disk, after the tool storage capacity of the small-density tool disk reaches the limit value, the tools with relatively large geometric dimensions are planned to the large-density tool disk. However, to avoid collisions, it is necessary to ensure that the tool seats on both adjacent sides of the target tool seat are in the empty state after the target tool seat is determined.

[0089] Embodiment 4

[0090] As Figure 5 shown, considering that there may be tool change errors between the second tool change mechanism and the multi-layer tool magazine, and there is no direct detection means for the tool seats in the multi-layer tool magazine, during the update of the tool storage information in the digital twin model, the target tool seat on the target tool disk is driven to rotate to the tool change station; the tool storage state of the target tool seat is detected by an optoelectronic sensor arranged near the tool change station, and the load-bearing state of the target tool disk is detected by a pressure sensor; when it is monitored that the tool storage state of the target tool seat changes, the target tool seat is driven away from the tool change station, and it is monitored whether the load-bearing state of the target tool disk changes; if the load-bearing state changes, the tool storage information of the target tool seat in the digital twin model is updated, and if the load-bearing state does not change, a fault warning is given.

[0091] In the specific implementation process, an optoelectronic sensor is provided for each tool storage disk in the multi-layer tool magazine, and the optoelectronic sensor is located at the tool change station; when the second tool change mechanism moves the target tool to the tool change station of the target tool disk, the target tool holder of the target tool disk is driven to rotate to the tool change station, and at this time, the optoelectronic sensor outputs an empty tool state; after the storage operation of the target tool is completed, the optoelectronic sensor outputs a tool storage state and then drives the target tool holder away from the tool change station; if the target tool holder recorded as the tool storage state moves away from the tool change station and the load-bearing state of the target tool disk increases with the storage of the target tool, it indicates that the tool storage is successful, and the tool storage information is determined to be updated to the digital twin model and the second monitoring data set.

[0092] Furthermore, the weight of the tool is usually a relatively stable parameter. For a certain type and model of tool, its weight should be within a certain tolerance range. This embodiment can achieve accurate measurement of the tool weight by setting a high-precision weighing sensor, and then determine whether the tool may be damaged or worn, and send a replacement request signal after determining the target tool. After the replacement is completed, it can be determined whether the replacement tool is correct by comparing the first monitoring data set and the second monitoring data set. If the comparison results are the same, it indicates that the replacement is completed; if the comparison results are different, it indicates that there is a fault in the replacement process.

[0093] Embodiment 5

[0094] When the machining operation of the numerical control center changes, it may be necessary to supplement the existing tool storage capacity of the tool magazine. Without affecting normal production, the tool magazine's overall tool storage capacity can be supplemented by manually adding tools to the chain-type tool magazine.

[0095] Specifically, as Figure 6 shown, in response to the tool replenishment request signal of the chain-type tool magazine, the coding information of the tool to be supplemented on the empty tool holder of the chain-type tool magazine is determined; the chain-type tool magazine presets a size threshold and a weight threshold based on the characteristic parameters of the tool to be supplemented; if the geometric size of the tool to be supplemented exceeds the size threshold, it is required that the adjacent tool holders on both sides of the tool holder corresponding to the tool to be supplemented remain in the empty tool state; if the weight parameter of the tool to be supplemented exceeds the weight threshold, it is required that the adjacent tool holders on the adjacent chain plates of the tool holder corresponding to the tool to be supplemented remain in the empty tool state.

[0096] In the specific implementation process, considering that after a tool with a large geometric size is placed in the tool holder of the chain-type tool magazine, it may collide with the tools in the adjacent tool holders. Therefore, after determining the target tool holder, it is necessary to ensure that the tool holders on both adjacent sides remain in the empty tool state to avoid the occurrence of tool collisions.

[0097] Furthermore, considering that in the structure of the chain-type tool magazine, two tool holders are installed on one chain plate, and the adjacent two chain plates are rotatably connected. When large-mass tools are installed on the adjacent tool holders of the adjacent two chain plates, it will cause excessive local load-bearing on the overall chain, and vibrations and shakes may occur to the chain during high-speed tool change, thus affecting the positioning accuracy of the chain-type tool magazine.

[0098] Therefore, in this embodiment, if the weight parameter of the supplementary tool exceeds the weight threshold of the target tool seat, it is necessary to ensure that the adjacent tool seats of the target tool seat and this tool seat are on the adjacent chain plates and remain in the empty tool state to reduce the risk of the transmission chain shaking due to excessive local load-bearing.

[0099] Embodiment 6

[0100] Considering that the tool change operations between the chain-type tool magazine and the multi-layer tool magazine are relatively frequent, and both the first tool change mechanism and the second tool change mechanism are driven by motors to perform reciprocating linear motions, the operating state of the motors will directly affect the accuracy of the tool change operations. Therefore, maintenance needs to be carried out before the motors fail.

[0101] Specifically, the current changes of the motors are collected through current sensors at the motor power lines; when it is monitored that the current amplitude or waveform of the motors exceeds the preset range, the collection frequency of the current sensors is increased; if the current amplitude of the motors continues to rise or the waveform anomaly intensifies, a maintenance request signal is sent.

[0102] Current sensors are installed on the power lines of the motors to monitor the current changes of the motors in real time, record the current data of the motors, and perform real-time analysis. The preset thresholds and alarm mechanisms give alarms when the current amplitude or waveform exceeds the set range, reminding the operators to conduct inspections and maintenance.

[0103] Embodiment 7

[0104] The present invention further discloses a vertical inverted translation tool magazine intelligent protection system, including:

[0105] A tool parameter management module, which is used to input the parameter information of different types and specifications of tools and construct a tool database.

[0106] A first detection module, which is used to collect the tool information of the chain-type tool magazine, associate the coding information and the tool seat numbers of the chain-type tool magazine, and construct a first monitoring data set.

[0107] A second detection module, which collects the tool information of the multi-layer tool magazine based on the tool information of the chain-type tool magazine, associates the coding information and the tool seat numbers of the multi-layer tool magazine, and constructs a second monitoring data set.

[0108] A digital twin module, which constructs a digital twin model of the multi-layer tool magazine and updates the tool storage information of the digital twin model in response to the second detection module.

[0109] The protection module optimizes the tool storage process of the multi-layer tool magazine based on the hierarchical constraint conditions and tool storage constraint conditions preset according to the usage frequency and geometric dimensions of the tool, optimizes the tool layout of the chain-type tool magazine based on the size threshold and weight threshold preset according to the characteristic parameters of the tool, and optimizes the tool change accuracy based on the current sensor at the tool change mechanism motor.

[0110] The control module, in response to different tool change request signals, associates with the first detection module, the protection module, and the tool parameter management module to control the tool replenishment of the chain-type tool magazine, and associates with the second detection module, the digital twin module, the protection module, and the tool parameter management module to control the tool storage of the multi-layer tool magazine.

[0111] Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended 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 a target tool disc based on the geometric size of the target tool; An empty tool holder closest to the tool changing station in the target tool disc is determined as the target tool holder.

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 4 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 the vertical inverted translational tool magazine according to claim 5 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 the vertical inverted translational tool magazine according to claim 6 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 claim 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 bin and updates 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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