Transportation control method and device for vehicle door split charging line

Abstract

The invention relates to a transportation control method and device for a vehicle door split charging line, and belongs to the technical field of automobile manufacturing. The method comprises the steps that when an unmanned transport vehicle arrives at a first transfer point, a vehicle door body on the unmanned transport vehicle is moved to a friction transportation line, and after first transfer operation is completed, the vehicle door body is moved to the friction transportation line; the unmanned transport vehicle is controlled to move to a second transfer point to wait for moving the assembled vehicle door body on the friction transport line to the unmanned transport vehicle, or the unmanned transport vehicle is controlled to drive away from the vehicle door split charging line to execute other assembly line operations; the friction transport line is added to serve as a transfer line, the time-consuming vehicle door component mounting stations can be arranged on the left and right sides of the friction transport line, so that the waiting time of unmanned transport vehicles is shortened, part of the unmanned transport vehicles can be released, the number of the unmanned transport vehicles of the vehicle door split charging line is effectively reduced, and therefore the transport cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of automobile manufacturing, and particularly relates to a transportation control method and device for a vehicle door sub-assembly line. BACKGROUND

[0002] The automobile manufacturing technology has evolved from manual manufacturing to automation and intelligentization. With the introduction of advanced manufacturing technologies such as electronic control technology and numerical control machine tools, the automobile production efficiency has been greatly improved, and a highly coordinated industrial chain has been gradually formed.

[0003] In the automobile manufacturing process, the vehicle door sub-assembly line is an important link. The traditional transportation control method of the vehicle door sub-assembly line usually relies on a large number of unmanned transport vehicles for transportation of vehicle door bodies and transmission of information. One unmanned transport vehicle is used to transport one set of vehicle door body, resulting in a large number of unmanned transport vehicles and unsaturated workload of the unmanned transport vehicles, which causes high transportation cost. SUMMARY

[0004] Therefore, the present application provides a transportation control method and device for a vehicle door sub-assembly line to solve the problem of high cost caused by the dependence of the existing vehicle door sub-assembly line on a large number of unmanned transport vehicles for transportation of vehicle door bodies and transmission of information.

[0005] To achieve the above purpose, the present application adopts the following technical solutions: In a first aspect, the present application provides a transportation control method for a vehicle door sub-assembly line, which comprises: performing a first transfer operation when the unmanned transport vehicle reaches a first transfer point; the first transfer operation is to move the vehicle door body on the unmanned transport vehicle to a friction transport line; after the first transfer operation is completed, controlling the unmanned transport vehicle to move to a second transfer point to wait for performing a second transfer operation, or controlling the unmanned transport vehicle to drive away from the vehicle door sub-assembly line to perform other assembly line operations; the second transfer operation is to move the assembled vehicle door body on the friction transport line to the unmanned transport vehicle.

[0006] Further, after the first transfer operation is completed, the control of the unmanned transport vehicle to move to the second transfer point to wait for performing the second transfer operation, or the control of the unmanned transport vehicle to drive away from the vehicle door sub-assembly line to perform other assembly line operations comprises: after the first transfer operation is completed, obtaining the unmanned transport vehicle queue information of the second transfer point; if the number of waiting unmanned transport vehicles in the unmanned transport vehicle queue information is less than a preset number, controlling the unmanned transport vehicle to move to the second transfer point to wait for performing the second transfer operation; If the number of waiting unmanned transport vehicles in the unmanned transport vehicle queue information is greater than or equal to a preset number, the unmanned transport vehicle is controlled to drive away from the door sub-assembly line to perform other assembly line operations.

[0007] Further, the method further comprises: obtaining a target transmission speed according to a production line beat; obtaining a target acceleration according to the target transmission speed; obtaining a target clamping force according to the target acceleration; setting a clamping force of the friction transport line on the door body carrier to the target clamping force.

[0008] Further, the obtaining a target transmission speed according to a production line beat comprises: obtaining a target transmission speed according to the production line beat through a transmission speed formula, the transmission speed formula being: V = L / T; wherein V is the target transmission speed, L is a preset workpiece spacing, and T is the production line beat.

[0009] Further, the obtaining a target acceleration according to the target transmission speed comprises: obtaining a target acceleration according to the target transmission speed through an acceleration formula, the acceleration formula being: a = (V-V 初始 ) / t; wherein a is the target acceleration, V is the target transmission speed, V 初始 is an initial transmission speed, and t is a preset acceleration time.

[0010] Further, the obtaining a target clamping force according to the target acceleration comprises: obtaining a target clamping force according to the target acceleration through a clamping force formula, the clamping force formula being: N = m ( g + a ) ; wherein N is the target clamping force, m is the weight of the door body and the carrier, g is the acceleration of gravity, and a is the target acceleration.

[0011] Further, the method further comprises: when the first transfer operation is performed, sending door body related data on the unmanned transport vehicle to an associated database of the door sub-assembly line, and clearing the unbundling relationship between the unmanned transport vehicle and the door body; the associated database is used to store a plurality of door body related data on the friction transport line.

[0012] Further, the method further comprises: In the execution of the second transfer operation, the assembled door body related data is bound to the unmanned transport vehicle.

[0013] Further, the method further comprises: According to the traffic volume, the number of assembly stations enabled on both sides of the friction transport line is adjusted to complete the corresponding assembly operation of the door body.

[0014] In a second aspect, the application provides a transport control device of a door sub-assembly line, comprising: A transfer module is configured to perform a first transfer operation when the unmanned transport vehicle reaches a first transfer point; the first transfer operation is to move the door body on the unmanned transport vehicle to the friction transport line; A control module is configured to control the unmanned transport vehicle to move to a second transfer point to wait for a second transfer operation after the first transfer operation is completed, or to control the unmanned transport vehicle to leave the door sub-assembly line to perform other assembly line operations; the second transfer operation is to move the assembled door body on the friction transport line to the unmanned transport vehicle.

[0015] The application has at least the following beneficial effects by adopting the above technical solutions: A transport control method and device of a door sub-assembly line are provided, when the unmanned transport vehicle reaches a first transfer point, the door body on the unmanned transport vehicle is moved to the friction transport line, after the first transfer operation is completed, the unmanned transport vehicle is controlled to move to a second transfer point to wait for the assembled door body on the friction transport line to be moved to the unmanned transport vehicle, or the unmanned transport vehicle is controlled to leave the door sub-assembly line to perform other assembly line operations; the application adds a friction transport line for transfer, which can set time-consuming door component installation stations on the left and right sides of the friction transport line to reduce the waiting time of the unmanned transport vehicle, and can release part of the unmanned transport vehicles, effectively reducing the number of unmanned transport vehicles of the door sub-assembly line, thereby reducing the transportation cost.

[0016] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the application. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0018] Figure 1is a flow chart of a transportation control method of a vehicle door sub-assembly line according to an example embodiment of the present application. Figure 2 is a structural schematic diagram of a vehicle door sub-assembly line according to an example embodiment of the present application. Figure 3 is a schematic block diagram of a transportation control device of a vehicle door sub-assembly line according to an example embodiment of the present application.

[0019] The present application will be further described below in conjunction with the accompanying drawings and specific embodiments. DETAILED DESCRIPTION

[0020] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described in detail below. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0021] Automobile manufacturing technology has evolved from manual manufacturing to automation and intelligentization. In the automobile manufacturing process, the vehicle door sub-assembly line is an important link. The traditional transportation control method of the vehicle door sub-assembly line usually relies on a large number of unmanned transport vehicles for transportation of vehicle door bodies and transmission of information. One unmanned transport vehicle is used for transportation of a set of vehicle door bodies, resulting in a large number of unmanned transport vehicles and unsaturated work load of the unmanned transport vehicles, causing high transportation cost. The unmanned transport vehicle can be an IGV or an AGV, i.e., an Intelligent Guided Vehicle (IGV) or an Automated Guided Vehicle (AGV).

[0022] The embodiment of the present application provides a transportation control method and device of a vehicle door sub-assembly line, adds a friction transportation line for a transfer line, sets time-consuming vehicle door component installation stations on the left and right of the friction transportation line to reduce the waiting time of the unmanned transport vehicles, and releases part of the unmanned transport vehicles, effectively reducing the number of unmanned transport vehicles of the vehicle door sub-assembly line, thereby reducing the transportation cost.

[0023] The method and device in the present application will be described below through specific embodiments.

[0024] Please refer to Figure 1 , Figure 1 is a flow chart of a transportation control method of a vehicle door sub-assembly line according to an example embodiment of the present application. Please refer to Figure 1 The method comprises the following steps. Step S11, when the unmanned transport vehicle reaches the first transfer point, a first transfer operation is performed; the first transfer operation is to move the door body on the unmanned transport vehicle to the friction transport line; Step S12, after the first transfer operation is completed, the unmanned transport vehicle is controlled to move to the second transfer point to wait for the second transfer operation, or the unmanned transport vehicle is controlled to drive away from the door sub-assembly line to perform other assembly line operations; the second transfer operation is to move the assembled door body on the friction transport line to the unmanned transport vehicle.

[0025] It should be noted that the technical solutions provided in the embodiments can be loaded in existing systems or applications in the form of a small program or in the form of a plug-in for use, or in the form of a separate application, and the transport control function is realized through an external interface. Applicable scenarios include but are not limited to: door sub-assembly line.

[0026] It should be noted that the identification and parking of the transfer point utilize existing technology, and the transfer of the door body also utilizes existing technology; the movement route of the unmanned transport vehicle is determined by the existing production line scheduling system.

[0027] It can be understood that the technical solutions provided in the embodiments, when the unmanned transport vehicle reaches the first transfer point, the door body on the unmanned transport vehicle is moved to the friction transport line, after the first transfer operation is completed, the unmanned transport vehicle is controlled to move to the second transfer point to wait for the door body assembled on the friction transport line to be moved to the unmanned transport vehicle, or the unmanned transport vehicle is controlled to drive away from the door sub-assembly line to perform other assembly line operations; the present application increases the friction transport line for transfer, which can set the time-consuming door component installation station on the left and right of the friction transport line to reduce the waiting time of the unmanned transport vehicle, and can release part of the unmanned transport vehicles, effectively reducing the number of unmanned transport vehicles of the door sub-assembly line, thereby reducing the transportation cost.

[0028] Please refer to Figure 2 , Figure 2 is a structural schematic diagram of a door sub-assembly line according to an exemplary embodiment of the present application, referring to Figure 2 , wherein the unmanned transport vehicle 2 loads the door body on the door disassembly line 1 and transports the door body to the first transfer point 3, the door body is transferred from the unmanned transport vehicle 2 to the friction transport line 4 at the first transfer point 3, transported to the installation station 6 by the friction transport line 4, and after the installation of the door body is completed, the door body is loaded together with the carrier into the unmanned transport vehicle 2 at the second transfer point 5, and the unmanned transport vehicle 2 transports the door body to the door assembly line 7.

[0029] Specifically, the carrier of the door body is a clamping arm that needs to be fixed to the friction transport line, the clamping arm drives the carrier to move to the installation station, and after the installation of the door body is completed, the clamping arm is placed on the unmanned transport vehicle.

[0030] In specific implementation, the step S11 of performing the first transfer operation when the unmanned transport vehicle reaches the first transfer point comprises: the first transfer operation is to move the door body on the unmanned transport vehicle to the friction transport line, when the first transfer operation is performed, the door body data on the unmanned transport vehicle is sent to the associated database of the door body assembly line, and the binding relationship between the unmanned transport vehicle and the door body is cleared; the associated database is used to store the door body data of the friction transport line.

[0031] It should be noted that the door body on the unmanned transport vehicle is detached by the door disassembly line and moved to the door body carrier of the unmanned transport vehicle.

[0032] In specific implementation, the step S12 of controlling the unmanned transport vehicle to move to the second transfer point to wait for performing the second transfer operation, or controlling the unmanned transport vehicle to drive away from the door body assembly line to perform other assembly line operations after the first transfer operation is completed comprises: after the first transfer operation is completed, the unmanned transport vehicle queue information of the second transfer point is obtained; if the number of waiting unmanned transport vehicles in the unmanned transport vehicle queue information is less than a preset number, the unmanned transport vehicle is controlled to move to the second transfer point to wait for performing the second transfer operation; if the number of waiting unmanned transport vehicles in the unmanned transport vehicle queue information is greater than or equal to the preset number, the unmanned transport vehicle is controlled to drive away from the door body assembly line to perform other assembly line operations.

[0033] It should be noted that the preset number in the unmanned transport vehicle queue information can be set according to demand, and is generally defaulted to 1, and can also be set to 2-3 when the unmanned transport vehicles are sufficient, and the unmanned transport vehicles are queued at the second transfer point.

[0034] It can be understood that the technical scheme provided by the embodiment can effectively reduce the unmanned transport vehicles on the door body assembly line, thereby reducing the transportation cost.

[0035] In specific implementation, the method further comprises: obtaining a target transmission speed according to the production line beat; obtaining a target acceleration according to the target transmission speed; obtaining a target clamping force according to the target acceleration; and setting the clamping force on the door body carrier on the friction transport line as the target clamping force.

[0036] Specifically, the target transmission speed is obtained according to the production line beat through a transmission speed formula, and the transmission speed formula is: V=L / T; wherein V is the target transmission speed, the unit is meter / second (m / s), L is a preset workpiece spacing, the unit is meter (m), and T is the production line beat, the unit is second (s).

[0037] It should be noted that the preset workpiece spacing is set according to business requirements, including the length of the door body carrier and the safety distance. The production line cycle time is obtained directly from the scheduling system; the scheduling system is an existing system.

[0038] In one specific embodiment, the production line cycle time is 60 seconds per piece (480 vehicles per day, 8-hour workday). Workpiece spacing: Carrier length of the door body 1.2 meters + safety distance 0.3 meters = 1.5 meters. Target transmission speed V = 1.5 / 60, i.e., 0.025 m / s.

[0039] Specifically, obtaining the target acceleration based on the target transmission speed includes: obtaining the target acceleration based on the target transmission speed using an acceleration formula, which is: a = (V - V) 初始 ) / t; where a is the target acceleration, V is the target transport speed, and V 初始 The initial transport speed is 0 by default, and t is the preset acceleration time.

[0040] It should be noted that the preset acceleration time is set according to specific business needs and is related to the transportation length of the friction transport line. A longer transportation length requires a longer preset acceleration time, and a shorter transportation length requires a shorter preset acceleration time.

[0041] Specifically, the target clamping force is obtained based on the target acceleration, including: obtaining the target clamping force using the clamping force formula based on the target acceleration. The clamping force formula is as follows: N = m ( g + a ); where N is the target clamping force, m is the weight of the door body and the vehicle, g is the gravitational acceleration, and a is the target acceleration.

[0042] It should be noted that there is acceleration during the transmission process. When calculating the target clamping force, the normal force is corrected by inertial force, taking into account that the transmission process is dynamic.

[0043] It is understood that the technical solution provided in this embodiment always controls the clamping arm to clamp the vehicle body with the most appropriate clamping force, effectively preventing the situation where the clamping force is too small and cannot be clamped, while also effectively preventing the clamping force from being too large and damaging the vehicle, thus ensuring the stability of transportation.

[0044] In practice, the method also includes: when performing the first transfer operation, sending the relevant data of the door body on the unmanned transport vehicle to the associated database of the door assembly line to clear the binding relationship between the unmanned transport vehicle and the door body; the associated database is used to store the relevant data of multiple door bodies on the friction transport line.

[0045] It should be noted that during the transfer, the unmanned transport vehicle and the door body are untied, and the relevant data of the door body is sent to the associated database so that the installation station can obtain the relevant installation information from the database.

[0046] In practice, the method also includes binding the relevant data of the assembled door body with the unmanned transport vehicle during the second transfer operation.

[0047] It should be noted that the assembled door body needs to be bound to the unmanned logistics vehicle in order to accurately determine the position of the door body during subsequent assembly. The bound unmanned logistics vehicle can then be mobilized to the door assembly line to carry out the door assembly operation.

[0048] In practice, the method also includes: adjusting the number of assembly stations activated on both sides of the friction transport line according to the business volume, in order to complete the corresponding assembly operations of the door body.

[0049] It should be noted that multiple assembly stations are pre-set on both sides of the friction transport line. At least one assembly station must be activated to complete the assembly of the door body parts. The number of assembly stations can be increased appropriately according to the business volume. The business volume can be specifically defined as the number of door bodies to be assembled. Since the number of assembly stations that can assemble per unit time is limited, when the number of door bodies to be assembled is large, more assembly stations need to be activated. For example, if each assembly station can assemble 16 door bodies in 8 hours, and the business volume is 36 door bodies to be assembled per day, then 36 ÷ 16 = 2.25, which is rounded up to 3. Therefore, 3 assembly stations need to be activated to meet the demand.

[0050] Please see Figure 3 , Figure 3 This is a schematic block diagram of a transport control device for a door assembly line according to an exemplary embodiment of the present invention. See also: Figure 3 The transport control device 100 for the door assembly line includes: The transfer module 101 is used to perform a first transfer operation when the unmanned transport vehicle arrives at the first transfer point; the first transfer operation is to move the door body on the unmanned transport vehicle to the friction transport line. The control module 102 is used to control the unmanned transport vehicle to move to the second transfer point to wait for the second transfer operation after the first transfer operation is completed, or to control the unmanned transport vehicle to leave the door sub-assembly line and perform other assembly line operations; the second transfer operation is to move the door body assembled on the friction transport line to the unmanned transport vehicle.

[0051] It should be noted that the device provided in this embodiment is applicable to scenarios including but not limited to: door assembly lines.

[0052] It should be noted that the identification and docking of transfer points are achieved using existing technologies, as are the transfer of the vehicle doors; the movement route of the unmanned transport vehicle is determined by the existing production line scheduling system.

[0053] It is understood that the device provided in this embodiment moves the door body on the unmanned transport vehicle to the friction transport line when the unmanned transport vehicle arrives at the first transfer point. After the first transfer operation is completed, the device controls the unmanned transport vehicle to move to the second transfer point to wait for the door body assembled on the friction transport line to be moved onto the unmanned transport vehicle. Alternatively, the device controls the unmanned transport vehicle to leave the door sub-assembly line and then perform other assembly line operations. This application adds a friction transport line for transfer, which can set the time-consuming door component installation station on the left and right of the friction transport line to reduce the waiting time of the unmanned transport vehicle and release some unmanned transport vehicles, effectively reducing the number of unmanned transport vehicles on the door sub-assembly line, thereby reducing transportation costs.

[0054] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), Rambus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0055] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0056] It should also be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for display, data used for analysis, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0057] The various embodiments in this specification are described in a related manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0058] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A transportation control method for a door assembly line, characterized in that, The method includes: When the unmanned transport vehicle arrives at the first transfer point, it performs the first transfer operation; the first transfer operation is to move the door body of the unmanned transport vehicle to the friction transport line. After the first transfer operation is completed, the unmanned transport vehicle is controlled to move to the second transfer point to wait for the second transfer operation, or the unmanned transport vehicle is controlled to leave the door sub-assembly line and perform other assembly line operations; the second transfer operation is to move the door body assembled on the friction transport line to the unmanned transport vehicle.

2. The control method according to claim 1, characterized in that, After the first transfer operation is completed, the unmanned transport vehicle is controlled to move to a second transfer point to wait for the second transfer operation, or the unmanned transport vehicle is controlled to leave the door assembly line and perform other assembly line operations, including: After the first transfer operation is completed, obtain the unmanned transport vehicle queue information of the second transfer point; If the number of waiting unmanned transport vehicles in the unmanned transport vehicle queue information is less than the preset number, then the unmanned transport vehicle is controlled to move to the second transfer point to wait for the second transfer operation to be performed. If the number of waiting unmanned transport vehicles in the queue information is greater than or equal to a preset number, then the unmanned transport vehicle is controlled to leave the door assembly line and perform other assembly line operations.

3. The control method according to claim 1, characterized in that, The method further includes: The target transmission speed is obtained based on the production line cycle time; The target acceleration is obtained based on the target transmission speed; The target clamping force is obtained based on the target acceleration. The clamping force on the door body carrier on the friction transport line is set as the target clamping force.

4. The control method according to claim 3, characterized in that, The process of obtaining the target transmission speed based on the production line cycle time includes: The target transmission speed is obtained based on the production line cycle time using the transmission speed formula, which is: V = L / T; Where V is the target transmission speed, L is the preset workpiece spacing, and T is the production line cycle time.

5. The control method according to claim 3, characterized in that, The step of obtaining the target acceleration based on the target transmission speed includes: The target acceleration is obtained from the target transmission speed using the acceleration formula, which is: a =(V-V 初始 ) / t ; Where a is the target acceleration, V is the target transport speed, and V 初始 The initial transport speed is 0 by default, and t is the preset acceleration time.

6. The control method according to claim 3, characterized in that, The process of obtaining the target clamping force based on the target acceleration includes: The target clamping force is obtained from the target acceleration using the clamping force formula, which is: N = m ( g + a )； Where N is the target clamping force, m is the weight of the door body and the vehicle, g is the gravitational acceleration, and a is the target acceleration.

7. The control method according to claim 1, characterized in that, The method further includes: When performing the first transfer operation, the door body-related data on the unmanned transport vehicle is sent to the associated database of the door assembly line to clear the binding relationship between the unmanned transport vehicle and the door body; the associated database is used to store multiple door body-related data on the friction transport line.

8. The control method according to claim 1, characterized in that, The method further includes: During the second transfer operation, the relevant data of the assembled door body are bound to the unmanned transport vehicle.

9. The control method according to claim 1, characterized in that, The method further includes: The number of assembly stations activated on both sides of the friction transport line is adjusted according to the business volume to complete the corresponding assembly operations of the door body.

10. A transport control device for a door assembly line, characterized in that, include: The transfer module is used to perform a first transfer operation when the unmanned transport vehicle arrives at the first transfer point; the first transfer operation is to move the door body on the unmanned transport vehicle to the friction transport line. The control module is used to control the unmanned transport vehicle to move to the second transfer point to wait for the second transfer operation after the first transfer operation is completed, or to control the unmanned transport vehicle to leave the door sub-assembly line and perform other assembly line operations; the second transfer operation is to move the door body assembled on the friction transport line to the unmanned transport vehicle.

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