Method, apparatus and storage medium for determining a production tempo of a rotary hub

Abstract

The application provides a method, device and storage medium for determining a production tempo of a rotating hub. The method comprises: obtaining single-vehicle time data, the single-vehicle time data comprising electrical inspection time, standard operation time and reserved time of personnel of a single vehicle in a rotating hub front station, a rotating hub middle station and a rotating hub rear station; establishing a single-vehicle time distribution model according to the single-vehicle time data; establishing a vehicle flow time distribution model according to the single-vehicle time distribution model, a field station layout and personnel configuration information; calculating an overall time required for all vehicles to pass through the rotating hub according to the vehicle flow time distribution model and for an increasing number of vehicles; averaging the overall time to obtain a single-vehicle passing time; and determining a convergence value of the single-vehicle passing time tending to be stable with the increasing number of vehicles as a rotating hub production tempo value. The application can accurately measure and calculate tempo data of the entire rotating hub area and quickly and accurately evaluate tempos in different states.

Description

Technical Field

[0001] The embodiments of the present invention generally relate to the field of vehicle manufacturing inspection technology, and more specifically, to a method, apparatus and storage medium for determining the production cycle time of a rotary drum. Background Technology

[0002] The wheel well is the area where OEMs conduct vehicle performance testing, which is divided into three sections: before wheel well, during wheel well, and after wheel well. The pre-wheel well station is mainly responsible for testing air conditioning initialization and some driver assistance calibration. The during-wheel well station is mainly responsible for testing the overall dynamic performance and braking performance of the vehicle using control equipment. The post-wheel well station is mainly responsible for testing engine performance and exhaust emissions.

[0003] The cycle time assessment for these workstations requires comprehensive consideration of the electrical inspection procedure's running time, personnel operation time, and equipment operating time, all of which are staggered. Furthermore, the workstation layout and personnel arrangement here differ from those of a production line. Workstation layout and personnel allocation are often overlapping, and the uneven distribution of inspection time before / after the drum turn inevitably leads to situations where personnel are waiting at workstations or the procedure is waiting for personnel. These factors result in complex drum turn conditions, making it difficult to accurately calculate the overall cycle time. Therefore, when arranging the process, a significant amount of cycle time is often reserved in the arrangement of operators and inspection equipment, leading to a waste of operator time, equipment, and energy.

[0004] Currently, the production cycle time of rotary drums can be calculated using either video observation combined with the Methods-Time Measurement (MTM) method or empirical estimation. The MTM method is a method used to calculate the time required for standard processes.

[0005] Video observation + MTM method is often used in industrial engineering to assess cycle time. It can accurately calculate the operation time of a single machine operator, but it cannot take into account the working conditions caused by personnel waiting at workstations and procedures, rework, and the influence of upstream and downstream processes, resulting in inaccurate assessment and control of the overall cycle time of the drum.

[0006] Empirical estimation methods are often used for evaluating the cycle time of electrical planning. By using electrical inspection procedures to statistically analyze the electrical inspection time of batch vehicles, the actual working conditions on site are also taken into account. However, due to its lack of precision, more buffer time is often reserved during the evaluation.

[0007] Based on the above information, there is an urgent need to develop an accurate and rapid method for evaluating the testing line's beat rate. Summary of the Invention

[0008] To address the aforementioned problems in the prior art, in a first aspect, embodiments of the present invention provide a method for determining the production cycle time of a rotary drum. The method includes: acquiring single-vehicle time data, which includes the electrical inspection time, standard operating time, and reserved time for a single vehicle at the pre-rotating, mid-rotating, and post-rotating workstations; establishing a single-vehicle time distribution model based on the single-vehicle time data; establishing a vehicle flow time distribution model based on the single-vehicle time distribution model, on-site workstation layout, and personnel configuration information; calculating the overall time required for all vehicles to pass through the rotary drum based on the vehicle flow time distribution model for an increasing number of vehicles; averaging the overall time to obtain the single-vehicle passing time; and determining a convergence value where the single-vehicle passing time tends to stabilize as the number of vehicles increases, as the rotary drum production cycle time value.

[0009] In some implementations, establishing a single-vehicle time distribution model based on the single-vehicle time data includes: listing the time occupied by a single vehicle in the pre-wheel hub station, the middle wheel hub station, and the post-wheel hub station, as well as the operation time of different personnel types, as multiple single-vehicle station personnel time streams, and aligning the multiple single-vehicle station personnel time streams; obtaining the single-vehicle time distribution model based on the time-aligned single-vehicle station personnel time streams.

[0010] In some implementations, the method further includes displaying a time-aligned time stream of personnel at a single vehicle workstation.

[0011] In some implementations, establishing a traffic flow time distribution model based on the single-vehicle time distribution model, on-site workstation layout, and personnel configuration information includes: listing each combination of multiple vehicles and different personnel types as multiple vehicle-personnel type combination time flows; considering one or more of the following factors: multiple turntables running in parallel in the on-site workstation layout, multiple personnel operating in parallel in the personnel configuration information, personnel connection factors, and the fact that the program's automatic running time does not require personnel, aligning the different vehicle-personnel type combination time flows in time; and obtaining the traffic flow time distribution model based on the time-aligned vehicle-personnel type combination time flows.

[0012] In some implementations, the method further includes displaying a time stream of multiple vehicle-person type combinations aligned to the time.

[0013] In some implementations, the reserved time includes vehicle repair time and / or workstation connection waiting time.

[0014] In some implementations, the electrical inspection time includes the time spent on worker-accompanied electrical inspection and the time for automatic program operation.

[0015] In some implementations, the standard operating time includes the time it takes for workers to move between different workstations and the time it takes for vehicles to move between different workstations.

[0016] In a second aspect, embodiments of the present invention provide an apparatus for determining the production cycle time of a rotary drum. The apparatus includes: a single-vehicle time data acquisition module configured to acquire single-vehicle time data, including the electrical inspection time, standard operating time, and reserved time for a single vehicle at the pre-rotating, mid-rotating, and post-rotating workstations; a single-vehicle time distribution model establishment module configured to establish a single-vehicle time distribution model based on the single-vehicle time data; a traffic flow time distribution model establishment module configured to establish a traffic flow time distribution model based on the single-vehicle time distribution model, on-site workstation layout, and personnel configuration information; an overall time calculation module configured to calculate the overall time required for all vehicles to pass through the rotary drum based on the traffic flow time distribution model and the increasing number of vehicles; an average time calculation module configured to average the overall time to obtain the single-vehicle passing time; and a cycle time value determination module configured to determine a convergence value where the single-vehicle passing time tends to stabilize as the number of vehicles increases, as the rotary drum production cycle time value.

[0017] In a third aspect, embodiments of the present invention provide a storage medium storing computer-executable instructions that, when executed by a processor, perform the method described according to any of the above embodiments.

[0018] The method, apparatus, and storage medium for determining the production cycle time of a rotary drum, as proposed in the embodiments of the present invention, can accurately calculate the cycle time data for the entire area of ​​the rotary drum. It can quickly and accurately assess the cycle time under different conditions, thereby enabling its application in evaluation work such as process layout, workstation modification, and personnel adjustments.

[0019] Compared to traditional methods such as "video observation + MTM method" and experience-based estimation of cycle time, this method can quickly adjust for changes (process, personnel arrangement, workstation, etc.), accurately calculate, and visualize the vehicle flow model, making it easier to identify cycle time optimization / bottleneck points. Attached Figure Description

[0020] The above and other objects, features, and advantages of embodiments of the present invention will become readily apparent from the following detailed description taken in conjunction with the accompanying drawings. Several embodiments of the invention are illustrated in the drawings by way of example and not limitation, wherein:

[0021] Figure 1 A flowchart of a method for determining the production cycle time of a rotary hub according to an embodiment of the present invention is shown;

[0022] Figure 2 This diagram shows an example layout of workstations and personnel in the production of rotary drums;

[0023] Figure 3 A time distribution diagram of a single vehicle module according to an embodiment of the present invention is shown;

[0024] Figures 4A-4D A multi-moment traffic flow state diagram according to an embodiment of the present invention is shown;

[0025] Figure 5 A traffic flow time distribution diagram according to an embodiment of the present invention is shown;

[0026] Figure 6 A schematic diagram of the beat calculation results according to an embodiment of the present invention is shown;

[0027] Figure 7 A block diagram of an apparatus for determining the cycle time of hub production according to an embodiment of the present invention is shown.

[0028] In the accompanying drawings, the same or corresponding reference numerals indicate the same or corresponding parts. Detailed Implementation

[0029] The principles and spirit of the present invention will now be described with reference to several exemplary embodiments. It should be understood that these embodiments are given merely to enable those skilled in the art to better understand and implement the present invention, and are not intended to limit the scope of the present invention in any way.

[0030] In one aspect, embodiments of the present invention provide a method for determining the production cycle time of a rotary drum, the method comprising steps S101-S106.

[0031] refer to Figure 2 It shows an example layout of workstations and personnel in the production of rotating hubs. Figure 2 In the example layout shown, the vehicle passes through the pre-hub, mid-hub, and post-hub processes sequentially according to its direction of movement. There are a total of 6 hub lines, shown as hub lines 1-6. On each hub line, there is one workstation each for the pre-hub and mid-hub processes, and two workstations sequentially for the post-hub process. The pre-hub and mid-hub processes involve 12 workers, with 2 workers responsible for each hub line. In the following text, the worker type responsible for the pre-hub and mid-hub processes will be referred to as Worker 1. The post-hub process involves 3 workers, with 1 person responsible for 2 hub lines, meaning 1 person manages 2 lines, totaling 4 post-hub workstations. In the following text, the worker type responsible for the post-hub process will be referred to as Worker 2.

[0032] For ease of explanation, the following text will use... Figure 2 The layout of workstations and personnel in the hub production process shown in the diagram is used as an example to illustrate the method steps. However, it should be noted that the method of the embodiments of the present invention is not limited to... Figure 2The layout is as follows. In practical applications, the specific model and values ​​will vary depending on the actual working conditions.

[0033] In step S101, single-vehicle time data (or single-vehicle modular time) is acquired. Single-vehicle time data may include the electrical inspection time of a single vehicle at the pre-drum, mid-drum, and post-drum workstations, the standard operating time of personnel, and the reserved time. As an example, single-vehicle time data can be acquired through video observation combined with the MTM (Methods-Time Measurement) method.

[0034] In one embodiment of the present invention, the reserved time may include vehicle rework time and / or workstation connection waiting time. Electrical inspection time may include worker-accompanied electrical inspection time and automatic program operation time. Standard operating time may include the time for workers to move between different workstations and the time for vehicles to move between different workstations.

[0035] In step S102, a single-vehicle time distribution model is established based on the single-vehicle time data.

[0036] refer to Figure 3 This illustrates a time distribution diagram for a single vehicle module according to an embodiment of the present invention. As one embodiment of the present invention, establishing a single vehicle time distribution model based on single vehicle time data may include: separately listing the time occupied by a single vehicle at the pre-drum workstation, mid-drum workstation, and post-drum workstation, as well as the operation time of different personnel types, as multiple single-vehicle workstation personnel time flows, and aligning the multiple single-vehicle workstation personnel time flows. For example... Figure 3 As shown, the time before the vehicle rotates, the time during the vehicle rotates, the time after the vehicle rotates, the operation time of worker 1, and the operation time of worker 2 are listed separately and aligned on the same time axis.

[0037] As one embodiment of the present invention, the method may further include: displaying a time-aligned time flow of personnel at a single vehicle workstation, for example, displaying it as a time waterfall chart on a monitor.

[0038] In step S103, a vehicle flow time distribution model is established based on the single-vehicle time distribution model, on-site workstation layout, and personnel configuration information.

[0039] As one embodiment of the present invention, the vehicle flow time distribution model is established based on the single-vehicle time distribution model, the on-site workstation layout, and personnel configuration information. This includes: listing each combination of multiple vehicles and different personnel types as multiple vehicle-personnel type combination time flows; considering one or more of the following factors: multiple turntables running in parallel in the on-site workstation layout, multiple personnel operating in parallel in the personnel configuration information, the connection between personnel, and the fact that the program's automatic running time does not require personnel, the different vehicle-personnel type combination time flows are time-aligned.

[0040] As one embodiment of the present invention, the method may further include: displaying a time stream of multiple vehicle-person type combinations aligned to time.

[0041] refer to Figures 4A-4D It shows a multi-moment traffic flow state diagram according to an embodiment of the present invention. Figures 4A-4D Taking the time it takes for 8 vehicles to pass through the entire rotating hub inspection as an example, the status of vehicles, personnel, and workstations at different times is shown.

[0042] At time 1, workers 1-1 and 1-2 start the program to run after turning the hubs of vehicles 1 and 2, and workers 1-3 and 1-4 start the program to run while turning the hubs of vehicles 3 and 4.

[0043] At time 2, vehicles 1 and 2 are in the front row of the workstations behind the rotating hub. Vehicles 1 and 2 begin automatic program testing. Workers 1-1 and 1-2 return to the front of the rotating hub. Vehicles 3 and 4 are driven into the rotating hub by workers 1-3 and 1-4 respectively for testing.

[0044] At time 3, worker 2 drives car 1 away from the work station behind the rotating hub. Car 2 completes its automatic program and waits for worker 2 to operate. Cars 3 and 4 are parked in the rear work station behind the rotating hub and enter the rotating hub for automatic program detection. Cars 5 and 6 are detected in the rotating hub by workers 1-1 and 1-2.

[0045] At time 4, worker 2 drives car 3 away from the work station behind the hub. Car 4 waits for worker 2. Car 5 is driven to the work station behind the hub by worker 1-1. Car 7 is driven to the work station in the middle of the hub by worker 1-3 for inspection. Car 6 needs to continue waiting in the hub for worker 2 to drive car 4 away from the work station behind the hub. Car 8 needs to continue waiting in front of the hub for car 6 to drive away from the work station in the middle of the hub.

[0046] refer to Figure 5 It shows a traffic flow time distribution diagram according to an embodiment of the present invention. Figure 5 It is based on Figures 4A-4D The traffic flow distribution map shown is derived from the multi-moment traffic flow conditions, indicating the following time of the eight vehicles. Figure 5 The horizontal axis represents multiple combinations of different vehicles and different people, and the vertical axis represents time.

[0047] In step S104, based on the traffic flow time distribution model, the total time required for all vehicles to pass through the hub is calculated for the increasing number of vehicles.

[0048] according to Figure 5 The traffic flow time distribution model shown can be used to obtain the total time required for all 8 cars to pass through the hub.

[0049] Using the method described above, the overall time can be calculated for an increasing number of vehicles. For example, the overall transit time for vehicles 1-30 can be calculated.

[0050] In step S105, the overall time is averaged to obtain the single vehicle passage time.

[0051] In step S106, a convergence value is determined where the single vehicle passage time tends to stabilize as the number of vehicles increases, and this value is used as the drum production cycle value.

[0052] refer to Figure 6 The diagram illustrates the cycle time calculation results according to an embodiment of the present invention. The single-vehicle transit time for 1 to 30 vehicles is calculated using the above method. It can be seen that the single-vehicle transit time tends to stabilize after calculating 20 vehicles. The average of the single-vehicle transit times for 20-30 vehicles is taken as the overall cycle time of the hub station.

[0053] This visual calculation method can effectively eliminate the influence of factors such as multiple parallel turning points, parallel operation of personnel and processes, and coordination between personnel. At the same time, modular data statistics also facilitate the adjustment of time and process during evaluation.

[0054] The method for determining the production cycle time of the rotating hub proposed in the embodiments of the present invention is based on the experience summarization, testing and analysis of on-site working conditions, and establishes a time distribution model of single vehicle and traffic flow, which can accurately calculate the cycle time data of the entire area of ​​the rotating hub.

[0055] Taking into account the working conditions of the turning hub, a single-vehicle time model and a rolling traffic flow time model are established, and adjustments are made accordingly. Figure 3 The timing of each module can be quickly and accurately calculated for the cycle time of the hub region under different working conditions; at the same time, the timing is visualized, making it easier to identify optimization points.

[0056] The method for determining the production cycle time of a rotating drum, as proposed in the embodiments of this invention, can quickly and accurately assess the cycle time under different conditions, thereby enabling its application in process layout, workstation modification, and personnel adjustment evaluations. For example, in process layout, in actual production, the time before rotating the drum generally < the time during rotating the drum < the time after rotating the drum. Therefore, the time before rotating the drum can be appropriately increased during process layout to balance the overall cycle time. Regarding workstation layout, if the parallel workstations before and after rotating the drum are changed to sequential workstations, the waiting time between rotating and rotating the drum can theoretically be eliminated, effectively improving equipment uptime and overall cycle time.

[0057] Compared to traditional methods such as "video observation + MTM method" and experience-based estimation of cycle time, this method can quickly adjust for changes (process, personnel arrangement, workstation, etc.), accurately calculate, and visualize the vehicle flow model, making it easier to identify cycle time optimization / bottleneck points.

[0058] In a second aspect, embodiments of the present invention provide an apparatus for determining the cycle time of drum production. (See reference...) Figure 7 A block diagram of an apparatus for determining the cycle time of a rotary drum production according to an embodiment of the present invention is shown. Figure 7 As shown, the device for determining the production cycle of the rotating hub includes modules 701-706.

[0059] The single-vehicle time data acquisition module 701 can be configured to acquire single-vehicle time data, which includes the electrical inspection time, standard operating time and reserved time of a single vehicle in the pre-drum station, mid-drum station and post-drum station.

[0060] The single-vehicle time distribution model building module 702 can be configured to build a single-vehicle time distribution model based on single-vehicle time data.

[0061] The traffic flow time distribution model building module 703 can be configured to build a traffic flow time distribution model based on the single vehicle time distribution model, on-site workstation layout, and personnel configuration information.

[0062] The overall time calculation module 704 can be configured to calculate the overall time required for all vehicles to pass through the hub based on the traffic flow time distribution model and the increasing number of vehicles.

[0063] The average time calculation module 705 can be configured to average the overall time to obtain the single vehicle passage time.

[0064] The cycle time determination module 706 can be configured to determine a convergence value that stabilizes as the number of vehicles increases, and use it as the cycle time value for hub production.

[0065] It should be noted that the functions implemented by each module in the device correspond one-to-one with the steps of the method described in the above embodiments. For specific implementation methods, examples, and beneficial effects, please refer to the description of the method above, which will not be repeated here.

[0066] In a third aspect, embodiments of the present invention provide a storage medium storing computer-executable instructions that, when executed by a processor, perform the method described according to any of the above embodiments.

[0067] The foregoing description of embodiments of the invention has been given for illustrative purposes and is not exhaustive, nor is it intended to limit the invention to the exact forms disclosed. Those skilled in the art will understand that various changes can be made without departing from the scope of the invention, and elements therein can be substituted with equivalents. Furthermore, many modifications can be made to adapt particular situations or materials to the teachings of the invention without departing from the basic scope of the invention. Therefore, the invention is not intended to be limited to the specific embodiments disclosed as the best mode contemplated for carrying out the invention; the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. A method for determining the cycle time of a rotary drum production, characterized in that, The method includes: Acquire single-vehicle time data, which includes the electrical inspection time, standard operating time, and reserved time of a single vehicle in the pre-drum station, mid-drum station, and post-drum station of a single vehicle; Based on the single-vehicle time data, establish a single-vehicle time distribution model; Based on the single-vehicle time distribution model, on-site workstation layout, and personnel configuration information, a vehicle flow time distribution model is established. Based on the traffic flow time distribution model, the total time required for all vehicles to pass through the hub is calculated for an increasing number of vehicles. The average of the total time is used to obtain the single-vehicle transit time; The convergence value at which the single-vehicle transit time tends to stabilize as the number of vehicles increases is determined and used as the drum production cycle value. The establishment of a single-vehicle time distribution model based on the single-vehicle time data includes: The time spent by a single vehicle in the pre-rotation station, mid-rotation station, and post-rotation station, as well as the operation time of different personnel types, are listed separately as multiple single-vehicle station personnel time flows, and the time flows of multiple single-vehicle station personnel are aligned. The single-vehicle time distribution model is obtained based on the time flow of personnel at a single vehicle workstation, which is aligned with the time data. Furthermore, the process of establishing a traffic flow time distribution model based on the single-vehicle time distribution model, on-site workstation layout, and personnel configuration information includes: List each combination of multiple vehicles and different personnel types as a time stream of multiple vehicle-person type combinations; Considering one or more of the following factors: multiple parallel turntables in the on-site workstation layout, multiple parallel operations by multiple personnel in the personnel configuration information, the connection between personnel, and the fact that the program's automatic running time does not require personnel to occupy time, the time streams of different vehicle-personnel type combinations are time-aligned. The traffic flow time distribution model is obtained based on the time flow of vehicle-person type combinations aligned with time.

2. The method according to claim 1, characterized in that, The method further includes: Displays the timeline of workers at a single vehicle workstation, aligned to the specified time.

3. The method according to claim 1, characterized in that, The method further includes: Displays a timeline of multiple vehicle-person type combinations aligned to the time.

4. The method according to claim 1, characterized in that, The reserved time includes vehicle repair time and / or workstation connection waiting time.

5. The method according to claim 1, characterized in that, The electrical inspection time includes the time spent by workers conducting the inspection and the time the program runs automatically.

6. The method according to claim 1, characterized in that, The standard operating time includes the time it takes for workers to move between different workstations and the time it takes for vehicles to move between different workstations.

7. A device for determining the cycle time of a rotary drum production, characterized in that, The device includes: The single-vehicle time data acquisition module is configured to acquire single-vehicle time data, which includes the electrical inspection time of a single vehicle in the pre-drum station, mid-drum station and post-drum station, the standard operating time of the personnel and the reserved time. A single-vehicle time distribution model establishment module is configured to establish a single-vehicle time distribution model based on the single-vehicle time data. The traffic flow time distribution model establishment module is configured to establish a traffic flow time distribution model based on the single vehicle time distribution model, on-site workstation layout, and personnel configuration information. The overall time calculation module is configured to calculate the overall time required for all vehicles to pass through the turntable based on the traffic flow time distribution model and the increasing number of vehicles. An average time calculation module is configured to average the overall time to obtain the single vehicle passage time. The cycle time determination module is configured to determine a convergence value that stabilizes as the number of vehicles increases, and use this value as the cycle time for hub production. The establishment of a single-vehicle time distribution model based on the single-vehicle time data includes: The time spent by a single vehicle in the pre-rotation station, mid-rotation station, and post-rotation station, as well as the operation time of different personnel types, are listed separately as multiple single-vehicle station personnel time flows, and the time flows of multiple single-vehicle station personnel are aligned. The single-vehicle time distribution model is obtained based on the time flow of personnel at a single vehicle workstation, which is aligned with the time data. Furthermore, the process of establishing a traffic flow time distribution model based on the single-vehicle time distribution model, on-site workstation layout, and personnel configuration information includes: List each combination of multiple vehicles and different personnel types as a time stream of multiple vehicle-person type combinations; Considering one or more of the following factors: multiple parallel turntables in the on-site workstation layout, multiple parallel operations by multiple personnel in the personnel configuration information, the connection between personnel, and the fact that the program's automatic running time does not require personnel to occupy time, the time streams of different vehicle-personnel type combinations are time-aligned. The traffic flow time distribution model is obtained based on the time flow of vehicle-person type combinations aligned with time.

8. A storage medium storing computer-executable instructions that, when executed by a processor, perform the method according to any one of claims 1-6.

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