Numerical control machining center multi-station synchronous machining system and machining method

Abstract

The invention discloses a multi-station synchronous machining system and method for a numerical control machining center, and relates to the technical field of synchronous machining systems, the system comprises a central control module, and the central control module is used for controlling operation of all modules in the system based on an i5 processor; the station equipment module comprises a plurality of processing stations; the process planning module is used for carrying out process analysis on the parts needing to be machined based on the computer software system; the synchronous control module is used for synchronously controlling the time, the position and the action of the plurality of processing stations; the monitoring and adjusting module 5 is used for monitoring and adjusting each processing station of the system; the precision compensation module is used for comparing with part design requirements after machining is completed; according to the multi-station synchronous machining system and method for the numerical control machining center, multi-station synchronous machining of the numerical control machining center can be achieved, and the machining precision can be effectively improved on the basis that the machining efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of synchronous machining systems, and more specifically, to a multi-station synchronous machining system and machining method for a CNC machining center. Background Art

[0002] In modern manufacturing, CNC machining centers are widely used in the processing of various complex parts. Traditional CNC machining centers usually adopt single-station or sequential processing methods. When processing multiple identical or different parts, each station needs to be processed in turn, resulting in long processing cycles and low equipment utilization. Although some existing multi-station processing methods have improved processing efficiency to a certain extent, there are problems in the multi-station synchronous processing process, such as poor coordination between stations, difficulty in ensuring processing accuracy, and complex synchronous control, which cannot meet the high-precision and high-efficiency processing needs.

[0003] Therefore, we propose a system and method that can realize multi-station synchronous machining in a CNC machining center with high machining accuracy and efficiency. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present application provides a multi-station synchronous machining system and a machining method for a CNC machining center to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above objectives, the present application provides the following technical solutions: a multi-station synchronous machining system for a CNC machining center, the system comprising:

[0006] Central control module, the central control module 1 is based on i5 processor and is used to control the operation of each module in the system;

[0007] The workstation equipment module includes multiple processing stations, each equipped with independent and adapted processing equipment to complete different processing steps;

[0008] Process planning module: The process planning module is based on a computer software system and is used to perform process analysis on parts that need to be processed and specify detailed processing routes;

[0009] A synchronization control module is used to synchronize the time, position and motion of multiple processing stations, and the synchronization control module includes a time synchronization unit, a position synchronization unit and a motion synchronization unit;

[0010] Monitoring and adjustment module, used to monitor and adjust each processing station of the system;

[0011] The precision compensation module is used to compare the machining results with the part design requirements after machining is completed, calculate the machining precision deviation and feed the deviation data back to the process planning module and the synchronous control module.

[0012] Furthermore, each processing station is provided with a positioning and clamping device for positioning and clamping parts, and each processing station is installed with a variety of sensors for real-time collection of position, surface quality and current data during the processing.

[0013] Furthermore, the process planning module determines the processing procedures and processing parameters of each part through the human-computer interaction interface, and assigns each procedure to the corresponding workstation to achieve balanced distribution of processing loads among the workstations. The process planning module is electrically connected to the workstation equipment module to accurately transmit the process parameters to each processing station equipment.

[0014] Furthermore, the time synchronization unit has a built-in time calculation and adjustment algorithm, which is based on the original processing time of each station process. Calculate the benchmark time T max , and determine the adjustment coefficient α ij During the processing, the processing progress of each station is monitored in real time. When a processing delay Δt occurs at a station k When, according to the formula: Calculate the time adjustment for other workstations and use the formula: Adjust processing speed to achieve time synchronization of each workstation;

[0015] Among them, n represents the number of workstations, m i Indicates the total number of processes at the i-th station, i is the station number, and i∈[1,n], j is the process number, and j∈[1,m i ], represents the original processing time of the jth process at the i-th station, t ij is the adjusted processing time, and Base time T max is the longest processing time of all workstations, which is used as the reference value for time synchronization. k Expressed as the processing delay time of the kth station, Δt ' i It is expressed as the amount of time that the i-th station needs to adjust when the k-th station is delayed, v i Expressed as the original processing speed of the i-th station, v ' i is the adjusted processing speed.

[0016] Furthermore, the position synchronization unit is used to receive the actual position data of the parts collected by the displacement sensors of each station. Combined with theoretical position Calculate the position deviation δX i , calculate the position deviation δX i The formula is: When the position deviation exceeds the set position deviation threshold δXthreshold When, according to the formula: ΔX i =k×δX i Calculate the position compensation amount and send adjustment instructions to the processing equipment to control the equipment to perform position compensation, ensuring the position accuracy of the parts processed at each station is consistent;

[0017] in, is the theoretical position coordinate of the part processed at the i-th station in a certain dimension, is the position coordinate obtained by actual measurement, δX i is the position deviation, that is, the difference between the actual position and the theoretical position, ΔX i is the position compensation amount, and k is the position compensation coefficient.

[0018] Furthermore, the action synchronization unit uses the state variable S ij Encode and monitor the processing equipment actions at each station, according to the action sequence constraint condition S ij ≥S kl And the time coordination condition: Let the starting time of the jth action at the i-th station be End time is Need to meet:

[0019]

[0020] in, is the maximum end time of all preceding actions of action (i, j), is the minimum start time of all subsequent actions of action (i, j).

[0021] Furthermore, the monitoring and adjustment module consists of a high-precision sensor matrix and an intelligent monitoring system. The sensor matrix collects the cutting force, temperature and vibration multi-dimensional processing parameters of each processing station in real time, and quickly transmits them to the central control module through industrial Ethernet or field bus protocol. The central control module has a built-in deep learning algorithm model to analyze and process the data. When an abnormal situation is detected, the corresponding alarm mechanism and processing strategy are triggered.

[0022] Furthermore, the precision compensation module obtains the actual size, shape and position error data of the parts through high-precision measuring equipment, compares it with the part design requirements, and calculates the processing accuracy deviation. The precision compensation module feeds back the deviation data to the process planning module and the synchronous control module, and automatically adjusts the process parameters and synchronous control parameters for the next batch of parts processing according to the deviation, thereby realizing closed-loop control of the processing accuracy.

[0023] Furthermore, a multi-station synchronous processing method of a CNC machining center comprises the following steps:

[0024] S1. Workstation layout and equipment configuration: multiple processing stations are rationally arranged on the workbench of the CNC machining center. Each station is equipped with independent processing equipment and positioning and clamping devices. According to the type of processed parts and process requirements, appropriate tools, fixtures and sensors are selected and installed and debugged;

[0025] S2. Parts processing process planning: Conduct process analysis for parts to be processed, develop detailed processing routes, break down the processing of each part into multiple processing steps, and determine the processing parameters for each step. For parts processed simultaneously at multiple stations, rationally allocate the processing stations and process sequence for each part based on the station layout and equipment capacity to ensure balanced processing load among the stations.

[0026] S3. Build a synchronous processing control model to control each processing station through the time synchronization model, position synchronization model and action synchronization model;

[0027] S4. Process monitoring and adjustment. During the machining process, the processing parameters of each machining station are collected in real time and transmitted to the i5 processor via sensors. The i5 processor analyzes and processes the collected data to determine whether the machining process is normal. If an abnormality occurs, the i5 processor promptly issues an alarm signal and automatically adjusts the machining parameters or suspends the process according to the preset fault handling strategy. At the same time, the i5 processor tracks the machining progress of each station in real time. If the machining progress of a station lags behind, the operator is notified to take appropriate measures to adjust the process.

[0028] S5. After processing is completed, the parts processed at each workstation are precision-checked. The actual size, shape, and position error data of the parts are obtained through measuring equipment. The inspection data is compared with the design requirements of the parts, and the processing accuracy deviation is calculated. Based on the processing accuracy deviation, the compensation function of the CNC system is used to adjust the processing parameters of the next batch of parts to achieve closed-loop control of the processing accuracy.

[0029] Furthermore, the time synchronization model uses the longest process processing time in each workstation as a benchmark to adjust the process processing time of other workstations. By optimizing the tool path and adjusting the cutting parameters, the process processing time of each workstation is brought close to the benchmark time. For workstations with longer processing time, the cutting speed or feed rate is increased to shorten their processing time while ensuring the processing quality. At the same time, a time compensation mechanism is established. When a processing delay occurs at a workstation, the processing rhythm of other workstations is automatically adjusted according to the delay time to ensure that each workstation can complete the processing task within the specified time.

[0030] The position synchronization model uses displacement sensors installed at each workstation to collect real-time position information of the processed parts and transmit it to the i5 processor. The i5 processor compares the actual position of the parts at each workstation with the theoretical position and calculates the position deviation. When the position deviation exceeds the set threshold, the CNC system automatically issues an adjustment command to control the processing equipment at each workstation to perform position compensation, ensuring consistent position accuracy of the processed parts at each workstation.

[0031] The motion synchronization model is used to define the motion sequence and motion logic of each processing equipment at each workstation and to establish motion synchronization control rules.

[0032] The technical effects and advantages of this application are:

[0033] Compared with the existing technology, this CNC machining center multi-station synchronous machining system and machining method can realize the synchronous machining of multiple stations in the CNC machining center, which can not only effectively improve the machining accuracy on the basis of improving the machining efficiency;

[0034] The constructed synchronous processing control model ensures the coordination of multi-station processing through time synchronization model, position synchronization model and action synchronization model, so that the precision of parts processed at each station remains consistent, further improving the processing quality of the product;

[0035] The machining process monitoring and adjustment as well as machining accuracy compensation functions can timely discover and handle abnormal situations in the machining process, realize closed-loop control of machining accuracy, effectively reduce the scrap rate, and improve the reliability and stability of the CNC machining center. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the system flow of this application;

[0037] Figure 2 Schematic diagram of the method flow of this application.

[0038] The accompanying drawings are marked as follows: 1. Central control module; 2. Work station equipment module; 3. Process planning module; 4. Synchronous control module; 401. Time synchronization unit; 402. Position synchronization unit; 403. Action synchronization unit; 5. Monitoring and adjustment module; 6. Precision compensation module. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0040] Example 1

[0041] As attached Figure 1 A multi-station synchronous machining system for a CNC machining center is shown, the system comprising:

[0042] Central control module 1, based on i5 processor, is used to control the operation of each module in the system;

[0043] Workstation equipment module 2, including multiple processing stations, each equipped with independent and adaptive processing equipment for completing different processing steps;

[0044] Each processing station is equipped with a positioning and clamping device for positioning and clamping parts, and each processing station is equipped with a variety of sensors to collect position, surface quality and current data in real time during the processing;

[0045] Process planning module 3, based on a computer software system, is used to perform process analysis on parts to be processed and specify detailed processing routes;

[0046] The process planning module 3 determines the processing procedures and processing parameters of each part through the human-computer interaction interface, and allocates each procedure to the corresponding workstation to achieve a balanced distribution of processing loads among the workstations. The process planning module 3 is electrically connected to the workstation equipment module 2 to accurately transmit the process parameters to each processing station equipment;

[0047] A synchronization control module 4 is used to perform synchronization control on time, position and motion of multiple processing stations, and the synchronization control module 4 includes a time synchronization unit 401, a position synchronization unit 402 and a motion synchronization unit 403;

[0048] The time synchronization unit 401 has a built-in time calculation and adjustment algorithm, which is based on the original processing time of each station process. Calculate the benchmark time T max , and determine the adjustment coefficient α ij During the processing, the processing progress of each station is monitored in real time. When a processing delay Δt occurs at a station k When, according to the formula: Calculate the time adjustment for other workstations and use the formula: Adjust processing speed to achieve time synchronization of each workstation;

[0049] Among them, n represents the number of workstations, m i Indicates the total number of processes at the i-th station, i is the station number, and i∈[1,n], j is the process number, and j∈[1,m i ], represents the original processing time of the jth process at the i-th station, t ij is the adjusted processing time, and Base time T max is the longest processing time of all workstations, which is used as the reference value for time synchronization. k Expressed as the processing delay time of the kth station, Δt ' i It is expressed as the amount of time that the i-th station needs to adjust when the k-th station is delayed, v i Expressed as the original processing speed of the i-th station, v ' i is the adjusted processing speed.

[0050] The position synchronization unit 402 is used to receive the actual position data of the parts collected by the displacement sensors of each station. Combined with theoretical position Calculate the position deviation δX i , calculate the position deviation δX i The formula is: When the position deviation exceeds the set position deviation threshold δX threshold When, according to the formula: ΔX i =k×δX i Calculate the position compensation amount and send adjustment instructions to the processing equipment to control the equipment to perform position compensation, ensuring the position accuracy of the parts processed at each station is consistent;

[0051] in, is the theoretical position coordinate of the part processed at the i-th station in a certain dimension, is the position coordinate obtained by actual measurement, δX i is the position deviation, that is, the difference between the actual position and the theoretical position, ΔX i is the position compensation amount, and k is the position compensation coefficient.

[0052] The action synchronization unit 403 uses the state variable S ij Encode and monitor the processing equipment actions at each station, according to the action sequence constraint condition S ij ≥S kl And the time coordination condition: Let the starting time of the jth action at the i-th station be End time is Need to meet:

[0053]

[0054] in, is the maximum end time of all preceding actions of action (i, j), is the minimum start time of all subsequent actions of action (i, j);

[0055] Monitoring and adjustment module 5, used to monitor and adjust each processing station of the system;

[0056] The monitoring and adjustment module 5 consists of a high-precision sensor matrix and an intelligent monitoring system. The sensor matrix collects the cutting force, temperature and vibration multi-dimensional processing parameters of each processing station in real time, and quickly transmits them to the central control module 1 through industrial Ethernet or field bus protocol. The central control module 1 has a built-in deep learning algorithm model to analyze and process the data. When an abnormal situation is detected, the corresponding alarm mechanism and processing strategy are triggered.

[0057] The precision compensation module 6 is used to compare the machining results with the part design requirements after the machining is completed, calculate the machining precision deviation and feed the deviation data back to the process planning module 3 and the synchronous control module 4.

[0058] The precision compensation module 6 obtains the actual size, shape and position error data of the parts through high-precision measuring equipment, compares it with the part design requirements, and calculates the processing accuracy deviation. The precision compensation module 6 feeds back the deviation data to the process planning module 3 and the synchronous control module 4, and automatically adjusts the process parameters and synchronous control parameters for the next batch of parts processing according to the deviation, thereby realizing closed-loop control of the processing accuracy.

[0059] Example 2

[0060] As attached Figure 2 A multi-station synchronous machining method for a CNC machining center is shown, and the method includes the following steps:

[0061] S1. Workstation layout and equipment configuration: multiple processing stations are rationally arranged on the workbench of the CNC machining center. Each station is equipped with independent processing equipment and positioning and clamping devices. According to the type of processed parts and process requirements, appropriate tools, fixtures and sensors are selected and installed and debugged;

[0062] S2. Parts processing process planning: Conduct process analysis for parts to be processed, develop detailed processing routes, break down the processing of each part into multiple processing steps, and determine the processing parameters for each step. For parts processed simultaneously at multiple stations, rationally allocate the processing stations and process sequence for each part based on the station layout and equipment capacity to ensure balanced processing load among the stations.

[0063] S3. Build a synchronous processing control model to control each processing station through the time synchronization model, position synchronization model and action synchronization model;

[0064] The time synchronization model uses the longest process time in each workstation as a benchmark and adjusts the process times of other workstations. By optimizing tool paths and adjusting cutting parameters, the process time of each workstation is brought close to the benchmark time. For workstations with longer processing times, the cutting speed or feed rate is increased to shorten their processing time while ensuring processing quality. At the same time, a time compensation mechanism is established. When a processing delay occurs at a workstation, the processing rhythm of other workstations is automatically adjusted according to the delay time to ensure that each workstation can complete the processing task within the specified time.

[0065] The position synchronization model uses displacement sensors installed at each workstation to collect real-time position information of the processed parts and transmit it to the i5 processor. The i5 processor compares the actual position of the parts at each workstation with the theoretical position and calculates the position deviation. When the position deviation exceeds the set threshold, the CNC system automatically issues an adjustment command to control the processing equipment at each workstation to perform position compensation, ensuring consistent position accuracy of the processed parts at each workstation.

[0066] The action synchronization model is used to define the action sequence and action logic of each processing equipment at each workstation and establish action synchronization control rules;

[0067] S4. Process monitoring and adjustment. During the machining process, the processing parameters of each machining station are collected in real time and transmitted to the i5 processor via sensors. The i5 processor analyzes and processes the collected data to determine whether the machining process is normal. If an abnormality occurs, the i5 processor promptly issues an alarm signal and automatically adjusts the machining parameters or suspends the process according to the preset fault handling strategy. At the same time, the i5 processor tracks the machining progress of each station in real time. If the machining progress of a station lags behind, the operator is notified to take appropriate measures to adjust the process.

[0068] S5. After processing is completed, the parts processed at each workstation are precision-checked. The actual size, shape, and position error data of the parts are obtained through measuring equipment. The inspection data is compared with the design requirements of the parts, and the processing accuracy deviation is calculated. Based on the processing accuracy deviation, the compensation function of the CNC system is used to adjust the processing parameters of the next batch of parts to achieve closed-loop control of the processing accuracy.

[0069] Example 3

[0070] Taking the processing of a certain type of aircraft engine blade as an example, the specific embodiment of the present invention is described in detail:

[0071] Workstation layout and equipment configuration: 5 processing stations are arranged on the workbench of the CNC machining center.

[0072] Station 1 is equipped with a five-axis machining center for rough machining of blade profiles. A dedicated blade fixture and end mill are installed, and a displacement sensor is installed to monitor the machining position.

[0073] Station 2 is equipped with a high-precision grinder, responsible for the fine processing of the blade surface, equipped with a grinding wheel and a surface roughness sensor;

[0074] Station 3 is equipped with an EDM machine to process blade cooling holes and install electrodes and current sensors;

[0075] Station 4 is equipped with a drilling center for machining blade mounting holes and installing drill bits and speed sensors;

[0076] Station 5 is equipped with a deburring device to deburr the processed blades and install brushes and pressure sensors;

[0077] Enter the information of each workstation equipment, tool, fixture, etc. into the corresponding database.

[0078] Parts processing technology planning: Analyze the processing technology of aircraft engine blades and formulate the following process route:

[0079] Station 1 performs rough milling of the blade profile; Station 2 performs fine grinding of the blade profile; Station 3 performs EDM machining of cooling holes; Station 4 performs drilling of mounting holes; and Station 5 performs deburring. Determine the machining parameters for each process. For example, when rough milling the blade profile at Station 1, the cutting speed is 200m / min, the feed rate is 0.25mm / r, and the cutting depth is 2mm; when fine grinding the blade profile at Station 2, the grinding speed is 30m / s, the feed rate is 0.05mm, and the grinding depth is 0.02mm. Rationally assign each process to the corresponding station to balance the machining load at each station.

[0080] Synchronous machining control model construction;

[0081] Among them, in the time synchronization model, after calculation, the blade surface finishing process at station 2 takes the longest time, which is 90 minutes, and is determined as the benchmark time T max , original processing time for rough milling of blade profile at station 1 For 80 minutes, the adjustment coefficient α is introduced 11 =0.95, then the adjusted processing time Minutes; original EDM time for cooling hole at station 3 70 minutes, α 31 =0.9, t 31 =70×0.9=63 minutes; original time for drilling the mounting hole at station 4 65 minutes, α 41 =0.92, t 41=65×0.92=59.8 minutes; original deburring time for station 5 For 50 minutes, α 41 =0.85, t 41 =50×0.85=42.5 minutes; at this point, the total processing time of each station is close to the benchmark time, meeting the overall time synchronization requirement;

[0082] During the processing, if the processing delay Δt3 = 5 minutes is caused by electrode loss at station 3, the time adjustment amount for other stations is calculated as follows: Minutes, then the time adjustment for station 1 Minutes, the original processing speed of station 1 v1 = 200m / min, the adjusted speed Similarly, calculate the time adjustment amount and the adjusted processing speed of stations 2, 4, and 5.

[0083] Position synchronization model, taking the processing of blade surface in the x-axis direction as an example, when processing at station 1, the theoretical position of a point on the blade surface is Measure position after actual processing The position deviation Set the position deviation threshold δX threshold =0.1mm, since δX1>δX threshold , position compensation is required, taking the compensation coefficient k = 0.8, then the compensation amount ΔX1 = k × δX1 = 0.8 × 0.12 = 0.096mm, the adjusted position CNC system according to Make adjustments for subsequent processing.

[0084] The action synchronization model introduces state variables to describe the actions of each station. The action of blade surface finishing at station 2 is represented by S 21 The rough milling action of blade profile at station 1 is represented by S 11 , because fine grinding needs to be done after rough milling is completed, so S 21 ≥S 11 When S 11 =1 (rough milling completed), S 21 Only then can it become 1 (start fine grinding).

[0085] In terms of time coordination, the preceding actions of EDM of cooling hole at station 3 (action 31) are rough milling of blade profile at station 1 (action 11) and fine grinding of blade profile at station 2 (action 21). Assume that the rough milling end time of station 1 is Minutes, finishing time of station 2 fine grinding Minutes, then minutes, to ensure that the cooling hole processing starts after the preceding action is completed. The post-action of EDM processing of cooling hole at station 3 is drilling of mounting hole at station 4 (action 41). If the drilling start time of mounting hole at station 4 is Minutes, then minutes to ensure that it does not affect the subsequent actions.

[0086] During machining, sensors at each station collect data in real time. When the surface roughness sensor at station 2 detects an abnormally high blade surface roughness value, exceeding a set threshold, it identifies the possibility of grinding wheel wear or improper grinding parameters. An alarm is issued, the grinding speed is automatically reduced, and the operator is notified to check the grinding wheel and adjust the grinding parameters.

[0087] Track the processing progress of each station in real time. If it is found that the drilling progress of the mounting hole in station 4 is lagging behind, notify the operator in time to check the tool wear or adjust the feed rate.

[0088] Machining accuracy compensation: After machining is complete, the blades are inspected for accuracy using an optical measuring instrument. If the blade profile error is found to exceed design requirements, the CNC system automatically adjusts machining parameters for stations 1 and 2, such as tool path, cutting depth, and grinding allowance, based on the error data, for the next batch of blades, achieving closed-loop control of machining accuracy.

[0089] Finally: The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A multi-station synchronous processing system for a CNC machining center, characterized in that: The system includes: Central control module (1), the central control module (1) is based on an i5 processor and is used to control the operation of each module in the system; A workstation equipment module (2), comprising a plurality of processing stations, each station being equipped with independent and adapted processing equipment for completing different processing steps; Process planning module (3), the process planning module (3) is used to perform process analysis on parts to be processed based on a computer software system and specify detailed processing routes; A synchronization control module (4) is used to perform synchronization control on multiple processing stations in terms of time, position and action, and the synchronization control module (4) includes a time synchronization unit (401), a position synchronization unit (402) and an action synchronization unit (403); A monitoring and adjustment module (5) is used to monitor and adjust each processing station of the system; The precision compensation module (6) is used to compare the machining with the part design requirements after the machining is completed, calculate the machining precision deviation and feed back the deviation data to the process planning module (3) and the synchronous control module (4).

2. The multi-station synchronous machining system of a CNC machining center according to claim 1, characterized in that: Each processing station is provided with a positioning and clamping device for positioning and clamping parts, and each processing station is installed with a variety of sensors for real-time collection of position, surface quality and current data during the processing process.

3. The multi-station synchronous machining system of a CNC machining center according to claim 2, characterized in that: The process planning module (3) determines the processing procedures and processing parameters of each part through a human-computer interaction interface, and allocates each procedure to a corresponding workstation to achieve a balanced distribution of processing loads among the workstations. The process planning module (3) is electrically connected to the workstation equipment module (2) to accurately transmit the process parameters to each processing workstation equipment.

4. The multi-station synchronous machining system of a CNC machining center according to claim 1, characterized in that: The time synchronization unit (401) has a built-in time calculation and adjustment algorithm, which is based on the original processing time of each workstation process. Calculate the benchmark time T max , and determine the adjustment coefficient α ij During the processing, the processing progress of each station is monitored in real time. When a processing delay Δt occurs at a station k When, according to the formula: Calculate the time adjustment for other workstations and use the formula: Adjust processing speed to achieve time synchronization of each workstation; Among them, n represents the number of workstations, m i Indicates the total number of processes at the i-th station, i is the station number, and i∈[1,n], j is the process number, and j∈[1,m i ], represents the original processing time of the jth process at the i-th station, t ij is the adjusted processing time, and Base time T max is the longest processing time of all workstations, which is used as the reference value for time synchronization. k Expressed as the processing delay time of the kth station, Δt' i It is expressed as the amount of time that the i-th station needs to adjust when the k-th station is delayed, v i Expressed as the original processing speed of the i-th station, v' i is the adjusted processing speed.

5. The multi-station synchronous machining system of a CNC machining center according to claim 4, characterized in that: The position synchronization unit (402) is used to receive the actual position data of the parts collected by the displacement sensors of each workstation Combined with theoretical position Calculate the position deviation δX i , calculate the position deviation δX i The formula is: When the position deviation exceeds the set position deviation threshold δX threshold When, according to the formula: ΔX i =k×δX i Calculate the position compensation amount and send adjustment instructions to the processing equipment to control the equipment to perform position compensation, ensuring the position accuracy of the parts processed at each station is consistent; in, is the theoretical position coordinate of the part processed at the i-th station in a certain dimension, is the position coordinate obtained by actual measurement, δX i is the position deviation, that is, the difference between the actual position and the theoretical position, ΔX i is the position compensation amount, and k is the position compensation coefficient.

6. The multi-station synchronous machining system of a CNC machining center according to claim 5, characterized in that: The action synchronization unit (403) uses the state variable S ij Encode and monitor the processing equipment actions at each station, according to the action sequence constraint condition S ij ≥S kl And the time coordination condition: Let the starting time of the jth action at the i-th station be End time is Need to meet: in, is the maximum end time of all preceding actions of action (i, j), is the minimum start time of all subsequent actions of action (i, j).

7. The multi-station synchronous machining system of a CNC machining center according to claim 6, characterized in that: The monitoring and adjustment module (5) is composed of a high-precision sensor matrix and an intelligent monitoring system. The sensor matrix collects the cutting force, temperature and vibration multi-dimensional processing parameters of each processing station in real time, and quickly transmits them to the central control module (1) through industrial Ethernet or field bus protocol. The central control module (1) has a built-in deep learning algorithm model to analyze and process the data. When an abnormal situation is detected, the corresponding alarm mechanism and processing strategy are triggered.

8. The multi-station synchronous machining system of a CNC machining center according to claim 7, characterized in that: The precision compensation module (6) obtains the actual size, shape and position error data of the parts through high-precision measuring equipment, compares them with the design requirements of the parts, and calculates the processing precision deviation. The precision compensation module (6) feeds the deviation data back to the process planning module (3) and the synchronous control module (4), and automatically adjusts the process parameters and synchronous control parameters when processing the next batch of parts according to the deviation, thereby realizing closed-loop control of the processing precision.

9. A multi-station synchronous processing method for a CNC machining center, characterized in that: The method comprises the following steps: S1. Workstation layout and equipment configuration: multiple processing stations are rationally arranged on the workbench of the CNC machining center. Each station is equipped with independent processing equipment and positioning and clamping devices. According to the type of processed parts and process requirements, appropriate tools, fixtures and sensors are selected and installed and debugged; S2. Parts processing process planning: Conduct process analysis for parts to be processed, develop detailed processing routes, break down the processing of each part into multiple processing steps, and determine the processing parameters for each step. For parts processed simultaneously at multiple stations, rationally allocate the processing stations and process sequence for each part based on the station layout and equipment capacity to ensure balanced processing load among the stations. S3. Build a synchronous processing control model to control each processing station through the time synchronization model, position synchronization model and action synchronization model; S4. Process monitoring and adjustment. During the machining process, the processing parameters of each machining station are collected in real time and transmitted to the i5 processor via sensors. The i5 processor analyzes and processes the collected data to determine whether the machining process is normal. If an abnormality occurs, the i5 processor promptly issues an alarm signal and automatically adjusts the machining parameters or suspends the process according to the preset fault handling strategy. At the same time, the i5 processor tracks the machining progress of each station in real time. If the machining progress of a station lags behind, the operator is notified to take appropriate measures to adjust the process. S5. After processing is completed, the parts processed at each workstation are precision-checked. The actual size, shape, and position error data of the parts are obtained through measuring equipment. The inspection data is compared with the design requirements of the parts, and the processing accuracy deviation is calculated. Based on the processing accuracy deviation, the compensation function of the CNC system is used to adjust the processing parameters of the next batch of parts to achieve closed-loop control of the processing accuracy.

10. The multi-station synchronous machining method of a CNC machining center according to claim 9, characterized in that: The time synchronization model uses the longest process processing time in each workstation as a benchmark and adjusts the process processing time of other workstations. By optimizing the tool path and adjusting the cutting parameters, the process processing time of each workstation is brought close to the benchmark time. For workstations with longer processing time, the cutting speed or feed rate is increased to shorten their processing time while ensuring the processing quality. At the same time, a time compensation mechanism is established. When a processing delay occurs at a workstation, the processing rhythm of other workstations is automatically adjusted according to the delay time to ensure that each workstation can complete the processing task within the specified time. The position synchronization model uses displacement sensors installed at each workstation to collect real-time position information of the processed parts and transmit it to the i5 processor. The i5 processor compares the actual position of the parts at each workstation with the theoretical position and calculates the position deviation. When the position deviation exceeds the set threshold, the CNC system automatically issues an adjustment command to control the processing equipment at each workstation to perform position compensation, ensuring consistent position accuracy of the processed parts at each workstation. The motion synchronization model is used to define the motion sequence and motion logic of each processing equipment at each workstation and to establish motion synchronization control rules.

Images