Logistics conveying system and method for multi-material mixed line production

Abstract

The invention discloses a logistics conveying system and method for multi-material mixed line production. The logistics conveying system comprises a plurality of upstream devices, a plurality of downstream devices and a main logistics conveying line connected with the upstream devices and the downstream devices in the middle, and each device is provided with a logistics conveying branch line. One or more upstream devices produce one or more materials, and the materials are conveyed to one or more downstream devices through the same main logistics conveying line in the middle. When the production frequencies of the upstream equipment and the downstream equipment reach the same, various materials produced by the upstream equipment can be orderly conveyed to the downstream equipment through the main logistics conveying line. And when the production frequencies of the upstream equipment and the downstream equipment are different, an anti-blocking mechanism of the logistics conveying line is triggered at the moment, and the logistics conveying branch line is started to cache the materials which cannot be digested, so that the main line cannot be blocked due to the fact that individual materials cannot be accepted. According to the invention, manpower is saved, and the production efficiency of equipment is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of logistics transportation, and in particular to a logistics transportation system and method for multi-material mixed-line production. Background Art

[0002] With the rapid development of new energy vehicles, more and more car companies are entering the new energy track, which has also brought about various differentiated battery demands. In response to this demand, multiple lines are often designed in the same production workshop to achieve the simultaneous production of one or more batteries by changing tooling. In this case, a single logistics line corresponds to the transportation of multiple batteries. When the production frequencies of upstream and downstream equipment are inconsistent, or when the downstream equipment fails and stops, there are serious problems such as blockage and scheduling difficulties. In the form of multiple logistics lines corresponding to the transportation of multiple batteries, there is a situation where multiple lines cannot communicate and complement each other when switching back to the production of a single battery, resulting in reduced equipment utilization and reduced production capacity. In response to the above-mentioned problems, the site mostly uses manual intervention to deal with the offline blocked batteries, and the weight of a single frame battery on the logistics line is about 100 kilograms, which results in a large workload and complicated work. Summary of the invention

[0003] The purpose of the present invention is to provide a logistics conveying system and method for multi-material mixed-line production, design a logistics conveying line anti-blocking mechanism, configure a logistics conveying branch line for each device, cache the pallets loaded with materials that cannot be digested by downstream equipment, and ensure that the main logistics conveying line will not be blocked due to the inability to accept individual materials.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions: The present invention provides a logistics conveying system for multi-material mixed-line production, comprising a plurality of upstream devices, a plurality of downstream devices, a main logistics conveying line connecting the upstream devices and the downstream devices, and an equipment logistics conveying line between each device and the main logistics conveying line. The present invention also comprises that each upstream device and downstream device is equipped with a logistics conveying branch line, and the logistics conveying branch line is arranged at the end of the equipment logistics conveying line and is adjacent to the main logistics conveying line, and is used for caching pallets when the production frequencies of the upstream devices and the downstream devices are inconsistent.

[0005] As a preferred embodiment, each upstream device and downstream device is equipped with a manipulator, a positioning mechanism, a device logistics conveyor line, a transplanting mechanism and a hoist. The manipulator is used to load the materials produced by the equipment into the tray at the positioning mechanism; The positioning mechanism is connected to the equipment logistics conveying line and is used to convey the pallet loaded with materials to the equipment logistics conveying line; The equipment logistics conveyor line includes an upper conveyor line and a lower conveyor line, wherein the upper conveyor line is used to convey pallets loaded with materials, and the lower conveyor line is used to convey empty pallets; The transfer mechanism is located at the end of the equipment logistics conveyor line, adjacent to the main logistics conveyor line, and is used to transport the pallet between the equipment logistics conveyor line and the main logistics conveyor line; The elevator is located at the end of the equipment logistics conveying line and is used to transfer the pallet between the upper layer and the lower layer of the equipment logistics conveying line.

[0006] As a preferred embodiment, both ends of the logistics conveying branch line are equipped with a transplanting mechanism for transporting the pallet between the logistics conveying branch line and the equipment logistics conveying line, and between the logistics conveying branch line and the main logistics conveying line.

[0007] Through this preferred embodiment, the transfer of pallets between different logistics conveying lines is achieved.

[0008] As a preferred implementation, the length of the logistics delivery branch line must meet the following requirements: L=L1*N; N=S*M / P; Among them, L is the length of the logistics conveying branch line, L1 is the length of a single pallet, N is the number of material pallets that need to be temporarily stored in the logistics conveying branch line, S is the average downtime of the equipment, M is the production cycle of the equipment, and P is the loading capacity of a single pallet.

[0009] In this preferred embodiment, by statistically calculating the average downtime of equipment failures and combining it with the equipment production rhythm, the length of the logistics conveying branch line is determined, so that the design of the logistics conveying branch line meets the actual production conditions and avoids the decline of cache function due to inappropriate length.

[0010] The present invention also provides a logistics conveying method for multi-material mixed production line, which is implemented based on the above-mentioned logistics conveying system for multi-material mixed production line, and the method comprises: When the production frequencies of the upstream equipment and the downstream equipment are inconsistent, the pallets on the main material conveying line are transferred to the logistics conveying branch line of the faulty equipment for buffering until the fault is repaired and production is resumed, and then the pallets on the logistics conveying branch line are transferred to the main material conveying line; The inconsistency in production frequency between the upstream equipment and the downstream equipment includes two situations: failure of one or more upstream equipment and failure of one or more downstream equipment.

[0011] As a preferred embodiment, when one or more downstream devices fail, The material receiving speed on the upper conveyor line of the faulty equipment is reduced or stopped, and the pallets loaded with corresponding materials on the upper layer of the main logistics conveyor line cannot enter the equipment logistics conveyor line of the downstream equipment; at this time, the pallets loaded with corresponding materials on the upper layer of the main logistics conveyor line are transported to the logistics conveyor branch line of the faulty equipment for buffering through the transfer mechanism; When the downstream equipment failure is repaired and production resumes, the pallets on the logistics conveying branch line are transported to the upper layer of the main logistics conveying line through the transplanting mechanism.

[0012] This preferred embodiment provides a caching mechanism for pallets loaded with materials when downstream equipment fails, ensuring that the main logistics conveyor line will not be blocked due to the inability to accept individual materials, effectively improving equipment utilization and production efficiency.

[0013] As a preferred implementation, when one or more upstream devices fail, The lower conveyor line of the faulty equipment cannot accommodate more empty pallets. At this time, the empty pallets are transported to the logistics conveyor branch line of the corresponding faulty equipment through the transfer mechanism for buffering; When the upstream equipment failure is repaired, the empty pallets on the logistics conveying branch line are transported to the lower layer of the main logistics conveying line through the transfer mechanism.

[0014] In this preferred embodiment, a caching mechanism for empty pallets is provided when upstream equipment fails, thereby ensuring that the main logistics conveying line will not be blocked, thereby effectively improving equipment utilization and production efficiency.

[0015] As a preferred embodiment, the method further comprises: When the production frequency of the upstream equipment and the downstream equipment is consistent, each upstream equipment produces materials respectively, and the materials are loaded into the pallet at the positioning mechanism by the manipulator. Then the pallet enters the upper conveyor line of the equipment logistics conveyor line, and enters the upper layer of the main logistics conveyor line through the transfer mechanism; The pallets containing the materials produced by each upstream device are sequentially sent to the corresponding downstream devices through the upper layer of the main material conveyor line; At the downstream equipment, the pallet is transported to the upper conveyor line of the equipment logistics conveyor line by the transfer mechanism, and then reaches the positioning mechanism, where the manipulator grabs the material from the pallet and puts it into the downstream equipment; After the pallet loaded with materials grabs all the materials at the downstream equipment, the empty pallet is transferred to the lower conveyor line of the equipment material conveyor line through the elevator, and then flows back to the lower conveyor line of the equipment material conveyor line of the upstream equipment through the lower layer of the main logistics conveyor line, and then enters the upper conveyor line through the elevator, and waits for the loading of materials at the positioning mechanism; This reciprocating cycle enables the flow of materials and pallets between upstream and downstream equipment.

[0016] In this preferred embodiment, a logistics conveying mechanism is provided when the production frequencies of the upstream equipment and the downstream equipment are consistent. The materials generated by the upstream equipment enter the main logistics conveying line at a certain frequency. At the same time, the downstream equipment receives the materials at the same frequency, and the empty pallets leave the main logistics conveying line at the same frequency. This cycle repeats itself, and there is no blockage on the main logistics conveying line.

[0017] By adopting the above technical means, the beneficial effects achieved by the present invention are: The present invention discloses a logistics conveying system and method for multi-material mixed-line production, wherein a logistics conveying branch line is configured for each device, and when the production frequencies of the upstream device and the downstream device are different, the anti-blocking mechanism of the logistics conveying line is triggered, and the logistics conveying branch line is started to cache the indigestible materials, ensuring that the main line will not be blocked due to the inability to accept individual materials. The present invention saves manpower and improves the production efficiency of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of a logistics conveying system for multi-material mixed production line provided by an embodiment of the present invention; Figure 2 A schematic diagram of logistics transportation logic for multi-material mixed-line production provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments and the accompanying drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0020] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the solutions according to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0021] It should be emphasized that the term “include / comprises” when used herein refers to the presence of features, elements, steps or components, but does not exclude the presence or addition of one or more other features, elements, steps or components.

[0022] It should also be noted that, unless otherwise specified, the term “connection” herein may refer not only to a direct connection but also to an indirect connection with an intermediate.

[0023] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the accompanying drawings, the same reference numerals represent the same or similar components, or the same or similar steps.

[0024] It should be emphasized here that the step marks mentioned below are not intended to limit the order of the steps, but it should be understood that the steps can be executed in the order mentioned in the embodiment, or in a different order from the embodiment, or several steps can be executed simultaneously.

[0025] Logistics conveying system for multi-material mixed production line Figure 1 As shown in the figure, it includes: several upstream equipment, several downstream equipment and a logistics conveyor line connecting the upstream and downstream equipment. One or more upstream equipment produces one or more materials, which are transported to one or more downstream equipment through the same logistics conveyor line. In the battery production process, after the winding (stacking) stage, semi-finished batteries and finished batteries are loaded on trays and transported between processes through logistics conveyors. Figure 1 The upstream equipment 101 produces material A, the upstream equipment 102 produces material B, and the upstream equipment 103 produces material C. The three materials A, B, and C are transported to the downstream equipment through the main logistics conveying line 004, where material A enters the downstream equipment 201, material B enters the downstream equipment 202, and material C enters the downstream equipment 203. The three materials A, B, and C enter the main material conveying line 004 in sequence. At this time, the speed at which the downstream equipment 201, 202, and 203 receives the three materials A, B, and C is consistent with the production speed of the upstream equipment 101, 102, and 103, and the three materials on the main logistics conveying line 004 are consumed in sequence.

[0026] Each upstream equipment and downstream equipment is equipped with a manipulator, a positioning mechanism, an equipment logistics conveyor line, a transplanting mechanism and an elevator, wherein the manipulator is used to load the materials produced by the equipment into the pallet at the positioning mechanism; the positioning mechanism is connected to the equipment logistics conveyor line, and is used to transport the pallet loaded with materials to the upper level of the equipment logistics conveyor line; the equipment logistics conveyor line includes an upper conveyor line and a lower conveyor line, the upper conveyor line is used to transport the pallet loaded with materials, and the lower conveyor line is used to transport empty pallets; the transplanting mechanism is located at the end of the equipment logistics conveyor line, adjacent to the main logistics conveyor line, and is used to transport the pallet between the equipment logistics conveyor line and the main logistics conveyor line; the elevator is located at the end of the equipment logistics conveyor line, and is used to transfer the pallet between the upper and lower levels of the equipment logistics conveyor line.

[0027] See also Figure 1In the embodiment of the present invention, the upstream equipment 101 is equipped with a manipulator 1011, a positioning mechanism 1012, an equipment logistics conveying line 1013, a transplanting mechanism 1014 and a hoist 1018; the upstream equipment 102 is equipped with a manipulator 1021, a positioning mechanism 1022, an equipment logistics conveying line 1023, a transplanting mechanism 1024 and a hoist 1028; the upstream equipment 103 is equipped with a manipulator 1031, a positioning mechanism 1032, an equipment logistics conveying line 1033, a transplanting mechanism 1034 and a hoist 1038; the downstream equipment 201 is equipped with a manipulator 2011, a positioning mechanism 2012, an equipment logistics conveyor line 2013, a transplanting mechanism 2014 and a lift 2018; the downstream equipment 202 is equipped with a manipulator 2021, a positioning mechanism 2022, an equipment logistics conveyor line 2023, a transplanting mechanism 2024 and a lift 2028; the downstream equipment 203 is equipped with a manipulator 2031, a positioning mechanism 2032, an equipment logistics conveyor line 2033, a transplanting mechanism 2034 and a lift 2038.

[0028] As described above, when the upstream equipment 101 produces material A, it is loaded into the pallet No. 01 at the positioning mechanism 1012 by the manipulator 1011, and then the pallet No. 01 enters the upper layer of the equipment logistics conveyor line 1013, and enters the upper layer of the main logistics conveyor line 004 through the transfer mechanism 1014. At the same time, the upstream equipment 102 produces material B, which is loaded into the pallet No. 02 at the positioning mechanism 1022 by the manipulator 1021, and then the pallet No. 02 enters the upper layer of the equipment logistics conveyor line 1023, and enters the upper layer of the main logistics conveyor line 004 through the transfer mechanism 1024, and is located after the pallet No. 01. At the same time, the upstream equipment 103 produces material C, which is loaded into the pallet No. 03 at the positioning mechanism 1032 by the manipulator 1031; then the pallet No. 03 enters the upper layer of the equipment logistics conveyor line 1033, and enters the upper layer of the main logistics conveyor line 004 through the transfer mechanism 1034, and is located after the pallet No. 02. The three material pallets of A, B and C are sequentially sent to the downstream through the upper layer of the main material conveying line 004. The pallet No. 01 loaded with material A enters the upper layer of the equipment logistics conveying line 2013 through the transfer mechanism 2014 and arrives at the positioning mechanism 2012. The manipulator 2011 grabs the pallet No. 01 and puts it into the downstream equipment 201. The pallet No. 02 loaded with material B enters the upper layer of the equipment logistics conveying line 2023 through the transfer mechanism 2024 and arrives at the positioning mechanism 2022. The manipulator 2021 grabs the pallet No. 02 and puts it into the downstream equipment 202. The pallet No. 03 loaded with material C enters the upper layer of the equipment logistics conveying line 2033 through the transfer mechanism 2034 and arrives at the positioning mechanism 2032. The manipulator 2031 grabs the pallet No. 03 and puts it into the downstream equipment 203.

[0029] In the above process, after pallet No. 01 loaded with material A grabs all material A at equipment 201, the empty pallet No. 01 enters the lower layer of material conveying line 2013 through elevator 2018. Empty pallet No. 01 flows back to logistics conveying line 1013 through the lower conveying line of the conveying path of full pallet No. 01, and enters the upper layer of equipment logistics conveying line 1013 through elevator 1018, waiting to be loaded with material A at positioning mechanism 1012. Similarly, empty pallet No. 02 will flow back to positioning mechanism 1022 to wait for material B to be loaded; empty pallet No. 03 will flow back to positioning mechanism 1032 to wait for material C to be loaded. This reciprocating cycle realizes the flow of materials and pallets between equipment.

[0030] In the above process, because the equipment production generally does not stop, the three materials will be continuously produced. Therefore, there will be multiple pallets of A, B, and C materials on the upper layer of the main logistics conveyor line 004 at the same time. When the production efficiency of the upstream equipment 101 and the downstream equipment 201 is consistent, the production efficiency of the upstream equipment 102 and the downstream equipment 202 is consistent, and the production efficiency of the upstream equipment 103 and the downstream equipment 203 is consistent, the pallets loaded with the three materials A, B, and C on the upper layer of the main logistics conveyor line are consumed at a certain frequency. That is, every time the upstream equipment 101 produces a tray of material A, the downstream equipment 201 receives a tray of material A at the same frequency. The same B and C materials enter the upper layer of the main logistics conveyor line 004 at a certain frequency and leave the upper layer of the main logistics conveyor line 004 at the same frequency. There is no blockage of logistics pallets on the main logistics conveyor line.

[0031] Based on the above-mentioned multi-material mixed line production line, when the production frequencies of the upstream equipment and the downstream equipment are different, that is, one or more of the multiple downstream equipment fail, resulting in the inability to receive the corresponding materials on the main material conveying line. Based on this, the embodiment of the present invention designs a logistics conveying line anti-blocking mechanism, configures a logistics conveying branch line for each device, and caches the pallets loaded with materials that the downstream equipment cannot digest, ensuring that the main logistics conveying line will not be blocked due to the inability to accept individual materials. Specifically: Each upstream device and downstream device is equipped with a logistics conveying branch line. The logistics conveying branch line is located at the end of the equipment logistics conveying line and is adjacent to the main logistics conveying line. It is used to cache pallets when the frequencies of the upstream and downstream devices are inconsistent.

[0032] Furthermore, both ends of the logistics conveying branch line are equipped with a transplanting mechanism for transporting the pallet between the logistics conveying branch line and the equipment logistics conveying line, and between the logistics conveying branch line and the main logistics conveying line.

[0033] See also Figure 1In the embodiment of the present invention, the upstream equipment 101 is equipped with a logistics conveying branch line 1015, and transplanting mechanisms 1016 and 1017; the upstream equipment 102 is equipped with a logistics conveying branch line 1025, and transplanting mechanisms 1026 and 1027; the upstream equipment 103 is equipped with a logistics conveying branch line 1035, and transplanting mechanisms 1036 and 1037; the downstream equipment 201 is equipped with a logistics conveying branch line 2015, and transplanting mechanisms 2016 and 2017; the downstream equipment 202 is equipped with a logistics conveying branch line 2025, and transplanting mechanisms 2026 and 2027; the downstream equipment 203 is equipped with a logistics conveying branch line 2035, and transplanting mechanisms 2036 and 2037.

[0034] In the actual production process, when the downstream equipment 201 fails, causing its production frequency to decrease or stop, the receiving speed of material A on the upper layer of the equipment logistics conveyor line 2013 decreases or stops, and the pallets loaded with material A on the upper layer of the main logistics conveyor line 004 cannot enter the equipment logistics conveyor line 2013. At this time, the anti-blocking mechanism of the logistics conveyor line is activated, and the pallets loaded with material A on the upper layer of the main logistics conveyor line 004 enter the logistics conveyor branch line 2015 through the transfer mechanisms 2014 and 2017 and wait.

[0035] When the failure of downstream equipment 201 is repaired and production resumes, the pallet containing material A in the logistics conveying branch line 2015 enters the main logistics conveying line 004 through transfer 2016 and is transported according to the above-mentioned pallet conveying logic numbered 01.

[0036] The empty pallet transportation scheduling logic is the same. When the upstream equipment 101 fails and stops, the lower layer of the equipment logistics conveying line 1013 cannot accommodate more pallets. At this time, the empty pallet of material A enters the logistics conveying branch line 1015 through the transfer mechanism 1017 and waits. When the upstream equipment 101 fails, the empty pallet of material A enters the lower layer of the main logistics conveying line 004 through the transfer mechanism 1016, and then is transported with the above-mentioned empty pallet transportation logic of number 01. Similarly, the transportation logic of full and empty pallets containing materials B and C is the same.

[0037] It should be noted that the lengths of logistics delivery branch lines 1015, 1025, 1035, 2015, 2025, and 2035 need to follow certain design principles. The first step is to calculate the average downtime S of the production equipment; the second step is to query the production rhythm M of the equipment; the third step is to calculate the number of material pallets N that need to be temporarily stored in the logistics delivery branch line: N=S*M / P, where P is the loading capacity of a single pallet; the fourth step is to calculate the length L of the logistics delivery branch line: L=L1*N, where L1 is the length of a single pallet).

[0038] Based on the above, a logistics conveying system with a mechanism to prevent material blocking in the logistics conveying line is designed. For its logistics conveying logic, please refer to Figure 2,include: S1. Upstream equipment produces a variety of materials; S2, the material enters the main logistics conveying line and is transported downstream; S3, determine whether the downstream equipment is shut down due to a fault. If not, the main logistics conveying line is transported normally and the materials enter the downstream equipment; if so, enter S4; S4, the pallets on the main logistics conveyor line enter the logistics conveyor branch line for buffering; S5, determine whether the faulty equipment has been repaired, if so, proceed to S6; S6. The pallets on the logistics conveying branch line enter the main logistics conveying line in an orderly manner; S7. The main logistics conveyor line operates normally and the materials enter the downstream equipment.

[0039] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A logistics conveying system for multi-material mixed production line, comprising a plurality of upstream equipment, a plurality of downstream equipment, a main logistics conveying line connecting the upstream equipment and the downstream equipment, and an equipment logistics conveying line between each equipment and the main logistics conveying line, characterized in that: It also includes that each upstream device and downstream device is equipped with a logistics conveying branch line, which is arranged at the end of the device logistics conveying line and is adjacent to the main logistics conveying line, and is used to cache pallets when the production frequencies of the upstream device and the downstream device are inconsistent.

2. The logistics conveying system for multi-material mixed production line according to claim 1 is characterized in that: Each of the upstream and downstream equipment is equipped with a manipulator, a positioning mechanism, an equipment logistics conveyor line, a transplanting mechanism and a hoist. The manipulator is used to load the materials produced by the equipment into the tray at the positioning mechanism; The positioning mechanism is connected to the equipment logistics conveying line and is used to convey the pallet loaded with materials to the equipment logistics conveying line; The equipment logistics conveyor line includes an upper conveyor line and a lower conveyor line, wherein the upper conveyor line is used to convey pallets loaded with materials, and the lower conveyor line is used to convey empty pallets; The transfer mechanism is located at the end of the equipment logistics conveyor line, adjacent to the main logistics conveyor line, and is used to transport the pallet between the equipment logistics conveyor line and the main logistics conveyor line; The elevator is located at the end of the equipment logistics conveying line and is used to transfer the pallet between the upper layer and the lower layer of the equipment logistics conveying line.

3. The logistics conveying system for multi-material mixed production line according to claim 1 is characterized in that: Both ends of the logistics conveying branch line are equipped with a transplanting mechanism for transporting the pallet between the logistics conveying branch line and the equipment logistics conveying line, and between the logistics conveying branch line and the main logistics conveying line.

4. The logistics conveying system for multi-material mixed production line according to claim 1 is characterized in that: The length of the logistics delivery branch line must meet the following requirements: L=L1*N; N=S*M / P; Among them, L is the length of the logistics conveying branch line, L1 is the length of a single pallet, N is the number of material pallets that need to be temporarily stored in the logistics conveying branch line, S is the average downtime of the equipment, M is the production cycle of the equipment, and P is the loading capacity of a single pallet.

5. A logistics transportation method for multi-material mixed production line, characterized in that: The method is implemented based on the logistics conveying system for multi-material mixed-line production according to any one of claims 1 to 4, and comprises: When the production frequencies of the upstream equipment and the downstream equipment are inconsistent, the pallets on the main material conveying line are transferred to the logistics conveying branch line of the faulty equipment for buffering until the fault is repaired and production is resumed, and then the pallets on the logistics conveying branch line are transferred to the main material conveying line; The inconsistency in production frequency between the upstream equipment and the downstream equipment includes two situations: failure of one or more upstream equipment and failure of one or more downstream equipment.

6. The method for transporting materials in a multi-material mixed production line according to claim 5, characterized in that: When one or more downstream devices fail, The material receiving speed on the upper conveyor line of the faulty equipment is reduced or stopped, and the pallets loaded with corresponding materials on the upper layer of the main logistics conveyor line cannot enter the equipment logistics conveyor line of the downstream equipment; at this time, the pallets loaded with corresponding materials on the upper layer of the main logistics conveyor line are transported to the logistics conveyor branch line of the faulty equipment for buffering through the transfer mechanism; When the downstream equipment failure is repaired and production resumes, the pallets on the logistics conveying branch line are transported to the upper layer of the main logistics conveying line through the transplanting mechanism.

7. The logistics transportation method for multi-material mixed production line according to claim 5 is characterized in that: When one or more upstream devices fail, The lower conveyor line of the faulty equipment cannot accommodate more empty pallets. At this time, the empty pallets are transported to the logistics conveyor branch line of the corresponding faulty equipment through the transfer mechanism for buffering; When the upstream equipment failure is repaired, the empty pallets on the logistics conveying branch line are transported to the lower layer of the main logistics conveying line through the transfer mechanism.

8. The method for transporting materials in a multi-material mixed production line according to claim 5, characterized in that: The method further comprises: When the production frequency of the upstream equipment and the downstream equipment is consistent, each upstream equipment produces materials respectively, and the materials are loaded into the pallet at the positioning mechanism by the manipulator. Then the pallet enters the upper conveyor line of the equipment logistics conveyor line, and enters the upper layer of the main logistics conveyor line through the transfer mechanism; The pallets containing the materials produced by each upstream device are sequentially sent to the corresponding downstream devices through the upper layer of the main material conveyor line; At the downstream equipment, the pallet is transported to the upper conveyor line of the equipment logistics conveyor line by the transfer mechanism, and then reaches the positioning mechanism, where the manipulator grabs the material from the pallet and puts it into the downstream equipment; After the pallet loaded with materials grabs all the materials at the downstream equipment, the empty pallet is transferred to the lower conveyor line of the equipment material conveyor line through the elevator, and then flows back to the lower conveyor line of the equipment material conveyor line of the upstream equipment through the lower layer of the main logistics conveyor line, and then enters the upper conveyor line through the elevator, and waits for the loading of materials at the positioning mechanism; This reciprocating cycle enables the flow of materials and pallets between upstream and downstream equipment.

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