Logistics design method for automobile production line

Abstract

The invention discloses an automobile production line logistics design method, which relates to logistics design, and is characterized in that the automobile production line logistics design method comprises a line side planning step, a sorting planning step, a storage planning step, an acceptance planning step and an unloading planning step; wherein according to the unloading planning step and the acceptance planning step, parts of which the number, the type and the quality are controlled are obtained; distributing parts to the production line side according to the steps of line side planning; parts which are not suitable for being processed in the step of line side planning are sorted according to the step of sorting planning; executing a part stacking strategy according to the step of storing the plan; wherein according to the step of line side planning, the strategy that the parts are supplied to the production line to be assembled is planned.

Description

Technical Field

[0001] The present application relates to the field of logistics design, and in particular to a method for designing logistics for an automobile production line, a device for designing logistics for an automobile production line, electronic equipment, a storage medium, and a vehicle. Background Art

[0002] At present, the traditional digitalization in the logistics industry focuses on logistics execution systems such as LES, WMS, and TMS, but lacks exploration of the digitalization and intelligence of logistics planning, the source of logistics. Especially in the process of designing and executing the logistics supply chain of automotive parts, the industry mainly relies on manual experience combined with offline planning standard design.

[0003] For example, typical problems encountered in logistics planning for manufacturing businesses such as the automotive industry are as follows:

[0004] 1. Insufficient cross-role collaboration affects the realization of optimal logistics planning;

[0005] 2. It is difficult to calculate the optimal solution for logistics planning under multiple constraints;

[0006] 3. It is difficult to quickly evaluate the quality of logistics planning and design;

[0007] 4. The efficiency of information connection is low and there is a lack of online data main line;

[0008] 5. There are differences between planning standards and actual operations, and logistics planning and logistics management are out of touch;

[0009] 6. The planning method is mainly based on manual CAD drawing and manual calculation, which is inefficient and inaccurate.

[0010] Therefore, a solution for vehicle production line logistics control is needed to plan digital and intelligent designs from the source of logistics, reduce dependence on manual methods, and enhance automated planning. Summary of the invention

[0011] The purpose of the present invention is to provide a method for designing automobile production line logistics, an automobile production line logistics design device, an electronic device, a storage medium and a vehicle, so as to at least solve the problem of lack of logistics planning and solve one technical problem of over-reliance on manual experience.

[0012] The present invention provides the following scheme:

[0013] According to one aspect of the present invention, a method for designing logistics of an automobile production line is provided, the method comprising: a step of line-side planning, a step of sorting planning, a step of storage planning, a step of acceptance planning, and a step of unloading planning;

[0014] wherein, according to the steps of the unloading planning and the steps of the acceptance planning, parts with controlled quantity, type and quality are obtained;

[0015] Allocate parts to the production line side according to the steps of the line side planning;

[0016] Sorting out the parts that are not suitable for processing in the steps of the line-side planning according to the steps of the sorting planning;

[0017] Execute a parts stacking strategy according to the steps of the storage planning;

[0018] The line-side planning step includes the steps of grouping parts according to workstations, classifying parts, classifying parts according to part types in logistics basic data, calculating the standard in-stock benchmark for each part for small and medium-sized items and large items, calculating the line-side shelf length required for small and medium-sized items, and determining which method of horizontal placement and vertical placement occupies less length, calculating the required length of the workstation line side, determining whether the line side can be placed, calculating the required length of large items according to the front and rear double warehouses, recalculating the required length of the logistics line side and comparing it with the actual available length of the line side, calculating the required length of large items according to the method of building tools in a timely manner, recalculating the required length of the logistics line side and comparing it with the actual available length of the line side, and calculating the required length of large items according to the SPS method;

[0019] Wherein, according to the steps of the line-side planning, a strategy for supplying parts to the production line for assembly is planned.

[0020] Furthermore, the step of grouping the parts according to the workstations includes:

[0021] Obtain information on basic logistics data;

[0022] According to the basic logistics data, information on part serial number, part type and part packaging size is obtained;

[0023] Get information about assembly station data;

[0024] According to the assembly station data, the parts are grouped and processed;

[0025] According to the result of the said collecting and processing of the parts, the said step of classifying the parts is input;

[0026] Among them, according to the collection processing of parts, the formula is obtained:

[0027] Where i is the part number; j is the station number; X ijIt is the assembly status of the part with part number i at the workstation with workstation number j, where the assembly of the part with part number i at the workstation with workstation number j is represented by 1, otherwise it is 0.

[0028] Furthermore, the step of classifying the parts includes:

[0029] Obtain parts matching database;

[0030] The parts matching database includes the part numbers of standard sequential parts.

[0031] Determine whether the part with the current part number i is a sequential part according to the part matching database;

[0032] If, yes, then the part with the current part number i is the result of the sequential part and is sent to the step of calculating the required length on the workstation line side;

[0033] If, no, the result that the part with the current part number i is not a sequential part is sent to the classification of the parts according to the part type in the logistics basic data;

[0034] Among them, the formula is obtained:

[0035] Among them, when the part number i is a sequential part, A i is 1 if the value is true, otherwise it is 0.

[0036] Furthermore, the step of classifying the parts according to the part types in the logistics basic data includes:

[0037] The parts matching database also includes classification information of part types;

[0038] The classification information of the part types includes classification information of standard parts, small and medium-sized parts, and large parts;

[0039] According to the result that the part with the current part number i is not a sequential part, the part with the current part number i is classified according to the classification information of the part type;

[0040] Determine whether the part with the current part number i is a standard part;

[0041] If, yes, then the part is stored according to the preset standard part placement position;

[0042] If,not, then determine whether the part with the current part number i is a part of the small or medium category;

[0043] If, yes, then the part is stored according to the preset small and medium-sized object placement position;

[0044] If,not, then determine whether the part with the current part number i is a part of the large category;

[0045] If,yes, then the part is stored according to the preset medium and large category placement position;

[0046] The parts are stored according to the preset standard parts placement positions to form a standard parts supermarket;

[0047] Among them, the formula is obtained:

[0048] When the part number i is a standard part, B i is 1, otherwise it is 0;

[0049] Among them, the formula is obtained:

[0050] When the station with station number j has a standard parts supermarket, S j is 1, otherwise it is 0;

[0051] Among them, the formula is obtained:

[0052] When the part number i is a small or medium-sized part, C i is 1, otherwise it is 0;

[0053] Among them, when B i is 0 and C i is 0, then the part with part number i is a part of the large category.

[0054] Furthermore, the step of calculating the standard in-stock benchmark of each part for small, medium and large objects includes:

[0055] Get the calculation formula: C si =C Ai +C ci ; C CI =C qi +C PI +C di ;

[0056]

[0057] in,

[0058] i is the part number;

[0059] C si The standard stock base quantity of the part with part number i;

[0060] C ai The number of parts with part number i arriving in each batch;

[0061] C ciThe number of caches left in the library for the part with part number i;

[0062] r is the vehicle sequence plan fulfillment rate in the preset time period;

[0063] C qi is the part quality cache amount of part number i;

[0064] C pi The planned difference buffer size for part number i;

[0065] C di is the part delay difference cache amount of part number i;

[0066] JPH is the output per unit time of the production line;

[0067] td i is the average delay time for parts with part number i to be delivered to the production line;

[0068] U i The bicycle usage of the part with part number i;

[0069] Contain i is the number of parts stored with part number i.

[0070] Furthermore, the step of calculating the length of the line shelf required for the small objects and determining whether the horizontal placement or the vertical placement takes up less length includes:

[0071] Get the calculation formula: lc i =min(D li , D wi );

[0072] i is the part number;

[0073] C si The standard stock base quantity of the part with part number i;

[0074] a i is the package length of the part with part number i;

[0075] b i is the packaging width of the part with part number i;

[0076] D w is the standard width of the scaffolding;

[0077] D li The length of the shelf required when the long sides of the packages are placed parallel;

[0078] D wi The length of the shelf required when the long side of the package is placed vertically;

[0079] lc i is the line side shelf length required for part number i when the part with part number i is a small or medium-sized item.

[0080] Furthermore, the step of calculating the required length of the workstation line side includes:

[0081] Get the calculation formula: l i =A i ×2×a i +(1-A i )×S j ×1000+(1-A i )×(1-B i )×C i ×lc i +(1-A i )×(1-B i )×(1-C i )×C si ×a i ;

[0082] i is the part number;

[0083] C si The standard stock base quantity of the part with part number i;

[0084] X ij The assembly status of the part with part number i at the workstation with workstation number j;

[0085] A i Whether the part with part number i is a sequential part;

[0086] B i The status of whether the part with part number i is a standard part;

[0087] S j Whether the station with part number i and station number j has a standard parts supermarket status;

[0088] C i Whether the part with part number i is a small or medium-sized item;

[0089] Lc i is the line side shelf length required for the part with part number i when the part with part number i is a small or medium-sized object;

[0090] a i is the package length of the part with part number i;

[0091] b iis the packaging width of the part with part number i;

[0092] l i The length of the line side space occupied by the part with part number i;

[0093] L j It is the required line length when all parts of the workstation with workstation number j are laid out according to the preset plan.

[0094] Further, the step of determining whether the line side can be placed includes:

[0095] Get the calculation formula:

[0096] When L j <Lf j When D i is 1, otherwise it is 0;

[0097] When D i =1, the station with station number j meets the line side layout requirements, the original input C si , A i , B i , S j , C i ,

[0098] The algorithm calculates L j data;

[0099] When D i =0, adjust the method of feeding parts to station number j, and enter the step of calculating the required length of the large object according to the front and rear double bins;

[0100] Among them, Lf j is the actual available length of the workstation with workstation number j.

[0101] Furthermore, the step of calculating the required length of the large object according to the front and rear double warehouses includes:

[0102] Get the calculation formula:

[0103] i is the part number;

[0104] C si The standard stock base quantity of the part with part number i;

[0105] X ij The assembly status of the part with part number i at the workstation with workstation number j;

[0106] A i Whether the part with part number i is a sequential part;

[0107] B i The status of whether the part with part number i is a standard part;

[0108] S j Whether the station with part number i and station number j has a standard parts supermarket status;

[0109] C i Whether the part with part number i is a small or medium-sized item;

[0110] Q i Whether the part with part number i can be placed in both front and rear bins;

[0111] lc i is the line side shelf length required for the part with part number i when the part with part number i is a small or medium-sized object;

[0112] a i is the package length of the part with part number i;

[0113] b i is the packaging width of the part with part number i;

[0114] l i The length of the line side space occupied by the part with part number i;

[0115] L j The required line length of all parts at the station with station number j when they are laid out according to the preset plan;

[0116] Lf j is the actual available length of the workstation with workstation number j;

[0117] The length data of the line side space occupied by the part with part number i when the line side layout mode of large batch parts is adjusted to the front and rear double warehouse placement state;

[0118] The required length data on the line side when the layout mode of the line side of large batch parts is adjusted to the front-to-back placement state.

[0119] Furthermore, the step of recalculating the required length of the logistics line side and comparing it with the actual available length of the line side includes:

[0120] Among them, obtain the calculation formula:

[0121] when When E i is 1, otherwise it is 0;

[0122] When E j=1, the actual occupied length of the part occupied line side of the workstation with workstation number j outputting part number i;

[0123] When E j =0, adjust the plan for the on-line method of the parts supplied to station number j, and enter the step of calculating the required length of the large object by the method of sequentially building the equipment.

[0124] Furthermore, the step of calculating the required length of the large object in accordance with the method of building the tool in sequence includes:

[0125] Set a part data set K. When the first 7 digits of the part number i of the large category in the data set are consistent, a sequential group is generated. The group of parts corresponds to a sequential group number data Kn in the data set K.

[0126] i is the part number;

[0127] Kn is the sequential group number;

[0128] a k The length of the sequential equipment corresponding to the sequential group number Kn;

[0129] a i The length of the part package of part number i;

[0130] Among them, the calculation formula is: a k =max(a i )i∈K.

[0131] Furthermore, the step of calculating the required length of the large object in accordance with the SPS method includes:

[0132] Get the calculation formula:

[0133] When the line side layout mode for large and medium-sized parts is adjusted to SPS mode, the line side space length occupied by the part with part number i;

[0134] When the line side layout mode is adjusted to SPS mode for large and medium-sized parts, the line side requires length.

[0135] Through the above scheme, the following beneficial technical effects are obtained:

[0136] This application uses the step budget planning calculation of line-side planning to arrange the subsequent processes of the production line according to the steps of the preset plan, thereby improving the degree of automation and reducing the degree of manual participation with the help of experience.

[0137] This application classifies parts and plans logistics according to different packaging types and usage types, so as to match complex logistics with standardized production processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0138] Figure 1 It is a flow chart of a method for designing logistics of an automobile production line provided by one or more embodiments of the present invention.

[0139] Figure 2 It is a structural diagram of a logistics design device for an automobile production line provided by one or more embodiments of the present invention.

[0140] Figure 3 A schematic diagram of the service planning logic of a specific embodiment of the present invention.

[0141] Figure 4 A schematic diagram of the line-side algorithm steps of a specific embodiment of the present invention.

[0142] Figure 5 A block diagram of an electronic device structure of a method for designing logistics for an automobile production line provided by one or more embodiments of the present invention. DETAILED DESCRIPTION

[0143] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0144] Figure 1 It is a flow chart of a method for designing logistics of an automobile production line provided by one or more embodiments of the present invention.

[0145] like Figure 1 The automobile production line logistics design method shown includes: step S1 of unloading planning, step S2 of acceptance planning, step S3 of line side planning, step S4 of sorting planning and step S5 of storage planning;

[0146] Among them, according to the steps of unloading planning and acceptance planning, parts with controlled quantity, type and quality are obtained;

[0147] Allocate parts to the production line side according to the steps of line side planning;

[0148] According to the steps of sorting planning, sort the parts that are not suitable for processing in the steps of sorting line side planning;

[0149] Execute parts stacking strategy according to storage planning steps;

[0150] Among them, the steps of line-side planning include the steps of grouping parts according to workstations, classifying parts, classifying parts according to part types in logistics basic data, calculating the standard in-stock benchmark of each part for small, medium and large items, calculating the length of line-side shelves required for small and medium items, and whether horizontal placement or vertical placement occupies less length, calculating the required length of the workstation line, determining whether the line can be placed, calculating the required length of large items according to the front and rear double warehouses, recalculating the required length of the logistics line and comparing it with the actual available length of the line, calculating the required length of large items according to the method of building tools in a sequential manner, and recalculating the required length of the logistics line and comparing it with the actual available length of the line;

[0151] The sorting planning step includes the step of calculating the required length of the large object according to the SPS method;

[0152] Among them, according to the steps of line-side planning, the strategy for supplying parts to the production line for assembly is planned.

[0153] Specifically, in this embodiment, it involves the components or parts flowing from the component manufacturer or the previous production line to the production line with assembly as the main work goal and function, and the components or parts are unloaded, inspected, line-side, sorted and stored.

[0154] The step of line-side planning is to plan the placement, supply and adjustment of parts to the assembly line to suit the work objectives and functions of the assembly line. When the step of line-side planning cannot place all parts near the assembly line, SPS is used for sorting, which usually involves individual parts or components that are too large in size.

[0155] In one embodiment, after the steps of unloading planning and acceptance planning, in the step of grouping parts according to workstations, the logistics basic data is obtained, including information such as the serial number, type and packaging size of the parts. In the step of classifying the parts, the parts are preliminarily screened according to the order of the standard sequential part numbers. The parts that meet the standard sequential part number order are directly arranged in the step of calculating the required length of the workstation line side. Other parts cannot be directly arranged in the step of calculating the required length of the workstation line side, and further classification post-processing is required. For example, in the step of classifying the parts according to the part type in the logistics basic data, the standard parts category, small and medium-sized categories and large categories are classified and processed. When the standard parts are obtained by classification, the stable standardized state of the standard parts is used to arrange them directly in the standard parts supermarket. Standard parts do not have very strong proprietary properties, but have relatively strong universality. The standard parts supermarket is a relatively universal shelf that carries parts that are less affected by the production line status, assembly stage and workstation position. The standard parts supermarket will also occupy the space on the workstation line side, which is also input into the step of calculating the required length of the workstation line side. After classifying the small, medium and large parts, the number that should be reserved for the production line assembly is determined by calculating the standard in-stock benchmark for each part for small, medium and large parts. Due to the large size of small, medium and large parts, the quantity, type and position cannot be arranged as arbitrarily as standard parts, and the placement method and position need to be planned. In the step of calculating the length of the line-side shelf required for small and medium-sized parts, and which method of horizontal placement or vertical placement takes up less length, arrange the small and medium-sized parts horizontally or vertically, so as to store as many parts as possible and use as few shelves as possible, and input the placement result data into the step of calculating the required length of the workstation line side. For large parts, they are basically no longer suitable for dense shelf placement. Based on the premise of meeting the in-stock benchmark, their location space can be arranged in the step of calculating the required length of the workstation line side.

[0156] In the step of determining whether the line side can be placed, it is determined whether all the parts and the shelves of the parts can be placed on the line side. If not, some parts need to be placed in other ways according to the preset priority to make up for the lack of space on the line side. For example, the parts are placed in the form of front and back double warehouses or left and right double warehouses, and the space utilization rate of the line side space is improved by optimizing a movable shelf (a kind of logistics equipment), so as to meet the rapid acquisition of the parts or components by the line side assembly as much as possible. Usually, large-scale parts with larger scales are given special treatment. For example, in the step of recalculating the required length of the logistics line side and comparing it with the actual available length on the line side, large-scale parts are selected, and the large-scale parts are processed by the Shunjian equipment in the step of calculating the required length of large objects in the way of Shunjian equipment (a kind of logistics equipment). For parts that are not suitable for direct placement on the line side, the step of calculating the required length of large objects in the way of SPS is processed through the layout of SPS mode. Shunjian equipment is a more specialized carrying equipment that can deliver parts to the line side at a certain rhythm without occupying the line side space. Parts of the same model are placed in it to make up for the lack of line side space.

[0157] The embodiments will involve explanations of some nouns.

[0158] Packaging: A general term for containers, materials and auxiliary materials used according to certain technical methods to protect products during circulation, facilitate storage and transportation, and promote sales.

[0159] Logistics equipment (also referred to as equipment): a general term for various carriers used for operations in factory logistics that can be recycled and meet protection functions, improve logistics efficiency and management efficiency, generally a movable metal frame with wheels;

[0160] Shelves: Shelves placed on the line side for small and medium-sized materials;

[0161] Standard parts: Standard parts refer to parts or components produced according to national or international standards. These parts are universal and interchangeable and are repeatedly used in multiple workstations in actual production;

[0162] Small and medium-sized items: can be placed in EU (reusable plastic boxes manufactured according to European standards) or cartons, and can be dropped into the parts on the shelves;

[0163] Large items: Use panel boxes or equipment (length>2000mm or width>2000mm or height>1000mm), parts that cannot be placed on the shelf;

[0164] Workstation: a location on the production line where parts are assembled;

[0165] The available area for logistics on the workstation line side (hereinafter referred to as the line side) refers to the area next to each workstation where logistics can place materials, and its length is generally the same as the length of the workstation;

[0166] Sequential delivery: A just-in-time delivery method, in which the supplier sorts the parts according to the production order of the production line vehicles and delivers the sorted parts to the designated unloading port on time, a logistics method of sequential delivery;

[0167] Shunjian: refers to the mode in which the logistics personnel in the OEM factory sort the parts and distribute them according to the actual production sequence of the production line vehicles;

[0168] Front and rear double-bin layout: refers to arranging two tools front and back in a direction perpendicular to the production line, which occupies the length of one tool on the line side;

[0169] SPS method: refers to the in-factory logistics distribution mode of single-vehicle single-part supply. Each part is loaded onto one or more material vehicles and delivered to the designated input point of the production line at the required time, without occupying the line-side logistics area.

[0170] In this embodiment, the step of grouping the parts according to the workstations includes:

[0171] Obtain information on basic logistics data;

[0172] Based on the basic logistics data, obtain information on part serial number, part type and part packaging size;

[0173] Obtain information about assembly station data;

[0174] According to the assembly station data, the parts are collected and processed;

[0175] According to the result of the parts collection process, the steps of classifying the parts are sent to the step of classifying the parts;

[0176] Among them, according to the collection processing of parts, the formula is obtained:

[0177] Where i is the part number; j is the station number; X ij It is the assembly status of the part with part number i at the workstation with workstation number j, where the assembly of the part with part number i at the workstation with workstation number j is represented by 1, otherwise it is 0.

[0178] Specifically, parts have packaging, for example, multiple parts of the same model are placed in one package. After the steps of unloading and acceptance planning, basic data of the parts to be imported into the assembly line are collected, and the serial number and type of the parts are associated according to the assembly function workstation, and the placement of the parts is planned according to the line space and packaging size.

[0179] In this embodiment, the step of classifying the parts includes:

[0180] Obtain parts matching database;

[0181] Part matching database includes part numbers for standard sequential parts

[0182] Determine whether the part with the current part number i is a sequential part according to the part matching database;

[0183] If, yes, then the part with the current part number i is the result of the sequential part and is sent to the step of calculating the required length on the workstation line side;

[0184] If, no, the part with the current part number i is not a sequential part, the result is sent to classify the parts according to the part type in the logistics basic data;

[0185] Among them, the formula is obtained:

[0186] Among them, when the part number i is a sequential part, A i is 1 if the value is true, otherwise it is 0.

[0187] Specifically, sequential parts refer to parts that are sorted and delivered to the factory by suppliers according to the production order of the production line; standard sequential parts refer to sequential parts that conform to a certain type of assembly rules. Standard sequential parts are generally used in large quantities, have color characteristics, and occupy a large length on the online side. For example, seats and bumpers in automobile production are considered standard sequential parts.

[0188] Each workstation has a unique assembly function, and multiple workstations work together to complete the assembly of a vehicle product. When parts enter the site, they need to refer to the rules related to the lead-in, and compare the part number i to determine whether the part near the site is a lead-in part. If it is, the current part data is sent to the step of calculating the required length on the workstation line side. If not, further classification processing is required.

[0189] In this embodiment, the step of classifying parts according to part types in the logistics basic data includes:

[0190] The parts matching database also includes classification information of part types; the classification information of part types includes classification information of standard parts, small and medium-sized objects, and large objects; according to the result that the part with the current part number i is not a sequential part, the part with the current part number i is classified according to the classification information of the part type; it is judged whether the part with the current part number i is a part of the standard part class; if yes, the part is stored according to the preset standard part class placement position; if no, it is judged whether the part with the current part number i is a part of the small and medium-sized objects class; if yes, the part is stored according to the preset small and medium-sized object placement position; if no, it is judged whether the part with the current part number i is a part of the large object class; if yes, the part is stored according to the preset medium and large object placement position; wherein, according to storing the part according to the preset standard part class placement position, a standard parts supermarket is formed; wherein, the formula is obtained: When the part number i is a standard part, B i is 1, otherwise it is 0; the formula is: When the station with station number j has a standard parts supermarket, S j is 1, otherwise it is 0; the formula is: When the part number i is a small or medium-sized part, C i is 1, otherwise it is 0; i is 0 and C i is 0, then the part with part number i is a part of the large category.

[0191] Specifically, standard parts are less affected by the flow and take up less space, so they can be solved by the standard parts supermarket. Other parts are further classified into small, medium and large items for subsequent placement planning.

[0192] In this embodiment, the step of calculating the standard inventory benchmark of each part for small, medium and large objects includes: obtaining the calculation formula: C si =C ai +C ci ; C ci =C qi +C pi +C di ; Where i is the part number; C si is the standard stock quantity of the part with part number i; C ai is the number of parts with part number i arriving in each batch; C ci is the number of parts with part number i left in the cache; r is the vehicle sequence plan fulfillment rate in the preset time period; C qi is the mass cache of the part number i; C piis the planned difference buffer size of part number i; C di is the delay difference buffer of part number i; JPH is the output per unit time of the production line; td i is the average delay time for parts with part number i to be delivered to the production line; U i The number of parts per vehicle with part number i; Contain i is the number of parts stored with part number i.

[0193] Specifically, in this embodiment, the standard base number of parts in the warehouse is used to cope with continuous assembly needs, so that there are always parts available on the line side, but not too many or too few. The standard base number of parts in the warehouse is mainly affected by the number of parts arriving and the number of parts buffered in the warehouse. The number of parts arriving usually refers to the number of parts delivered by the supplier in this batch, and the number of parts buffered in the warehouse usually refers to the additional safety stock redundancy reserved in order to prevent the arrival quantity at one time from not meeting the actual production needs of the production line. Too many parts buffered in the warehouse will occupy too much space in the field, and too few parts may cause the assembly process to be interrupted. Therefore, the number of parts buffered in the warehouse is further adjusted by the part quality buffer, the part plan difference buffer, and the part delay difference buffer. The part quality buffer usually refers to the extra safety stock redundancy reserved due to quality issues; the part plan difference buffer usually refers to the extra safety stock redundancy reserved due to the vehicle sequence plan fulfillment rate; the part delay difference buffer usually refers to the extra safety stock redundancy reserved due to the supplier's delayed arrival, and the vehicle sequence plan fulfillment rate usually refers to the external logistics that asks the supplier for goods according to the production plan. There is a difference between the production plan and the vehicle sequence produced by the assembly line. This difference is called the vehicle sequence plan fulfillment rate. Among them, the part delay difference buffer is affected by the output per unit time of the production line, the average delay time for the delivery of parts to the production line, the part single vehicle usage, and the number of parts received. The average delay time for the delivery of parts to the production line usually refers to the average length of time that lags behind the planned delivery time. The number of parts received usually refers to how many parts are in a packaging box, and the part single vehicle usage usually refers to the number of parts consumed on a vehicle.

[0194] Among them, the vehicle assembly quantity is calculated in units of one hour, and the parts delay difference cache is calculated in units of one minute.

[0195] In this embodiment, C si is the standard inventory base quantity of the part with part number i, which refers to the inventory quantity (number of boxes) of parts stored in the logistics area of ​​the OEM production workshop; C ai is the number of parts with part number i arriving in each batch, which refers to the number of boxes of parts delivered by the supplier at one time; C ciis the number of parts with part number i left in the cache in the library; r is the vehicle sequence plan fulfillment rate in the preset time period, which refers to the proportion of cars that actually strictly follow the production operation plan released the previous day to the total number of cars produced in this time period, the vehicle sequence plan fulfillment rate; C qi C is the quality buffer of the part number i, which is the inventory reserved to prevent part quality problems; pi is the planned difference buffer of part number i, which is the reserved inventory due to the difference between the production planned sequence and the actual production sequence; C di is the delay difference buffer of part number i, which refers to the inventory reserved to prevent supplier delivery delays; JPH is the output per unit time (per hour) of the production line; td i is the average delay time for parts with part number i to be delivered to the production line; U i The single vehicle usage of the part number i refers to the number of two pieces required to produce one car; Contain i The number of parts with part number i is the number of parts contained in the package.

[0196] In this embodiment, the steps of calculating the length of the line side shelf required for the small and medium-sized objects and whether the horizontal placement or the vertical placement occupies less length include: obtaining the calculation formula: lc i =min(D li , D wi ); i is the part number; C si is the standard stock quantity of the part with part number i; a i is the packaging length of the part with part number i; b i The packaging width of the part with part number i; D w D is the standard width of the scaffolding; li The length of the shelf required when the long sides of the packages are placed in parallel; D wi The length of the shelf required when the long side of the package is placed vertically; lc i is the line side shelf length required for part number i when the part with part number i is a small or medium-sized item.

[0197] Specifically, in this embodiment, the line-side shelf is a multi-layer shelf, and the space can hold at least one small or medium-sized part. Usually, more than one small or medium-sized part can be placed in a line-side shelf, and the parts are placed parallel or vertically on the line-side shelf in accordance with the standard inventory reference quantity of the corresponding parts at the workstation, so as to place more parts and use less line-side shelves. The number of parts that can be placed on the line-side shelf is an integer multiple of the length or width of the part, and stacking is not the preferred placement method.

[0198] In this embodiment, the step of calculating the required length of the workstation line side includes:

[0199] Get the calculation formula: l i =A i ×2×a i +(1-A i )×S j ×1000+(1-A i )×(1-B i )×C i ×lc i +(1-A i )×(1-B i )×(1-C i )×C si ×a i ; i is the part number; C si is the standard stock quantity of the part with part number i; X ij A is the assembly status of the part with part number i at the workstation with workstation number j; i Whether the part with part number i is a sequential part; B i Is the status of whether the part with part number i is a standard part; S j Is the status of whether the workstation with part number i and workstation number j has a standard parts supermarket? i Is the status of whether the part with part number i is a small or medium-sized object; lc i is the length of the line side shelf required for the part with part number i when it is a small or medium-sized object; a i is the packaging length of the part with part number i; b i is the packaging width of the part with part number i; l i L is the length of the line side space occupied by the part with part number i; j It is the required line length when all parts of the workstation with workstation number j are laid out according to the preset plan.

[0200] Specifically, along with the sequential parts, standard parts, small and medium-sized parts and large objects, the placement design is based on the standard base quantity of parts in the warehouse. The resulting line-side space demand (line-side required length) can be compared with the actual line-side space of the current corresponding workstation to output data results on whether the current space demand can be met.

[0201] In this embodiment, the following steps of determining whether the line side can be placed include: obtaining a calculation formula: When L j <Lf j When D i is 1, otherwise it is 0; when D i=1, the station with station number j meets the line side layout requirements, the original input C si , A i , B i , S j , C i 、The algorithm calculates L j data; when D i = 0, adjust the method of feeding parts to station number j, and enter the step of calculating the required length of the large object according to the front and rear double warehouses; where Lf j is the actual available length of the workstation with workstation number j.

[0202] Specifically, in this embodiment, the required length of the line side when all parts are laid out according to the planned preset scheme is compared with the actual available length of the workstation (corresponding to the line side space of the workstation). If the demand cannot be fully met, the step of calculating the required length of the large object according to the front and rear double warehouses is started to make adjustments. The double warehouse mode means that two shelves or equipment for holding parts are placed side by side or front and back on the line side to make up for the shortage of parts.

[0203] In this embodiment, the step of calculating the required length of the large object according to the front and rear double warehouses includes:

[0204] Get the calculation formula: i is the part number; C si is the standard stock quantity of the part with part number i; X ij A is the assembly status of the part with part number i at the workstation with workstation number j; i Whether the part with part number i is a sequential part; B i Is the status of whether the part with part number i is a standard part; S j Is the status of whether the workstation with part number i and workstation number j has a standard parts supermarket? i Q is whether the part with part number i is a small or medium-sized item; i Whether the part with part number i can be placed in both front and rear bins; lc i is the length of the line side shelf required for the part with part number i when it is a small or medium-sized object; a i is the packaging length of the part with part number i; b i is the packaging width of the part with part number i; l i L is the length of the line side space occupied by the part with part number i; j Lf is the required length of the line side when all parts of the station with station number j are laid out according to the preset plan; j is the actual available length of the workstation with workstation number j; The length data of the line side space occupied by the part with part number i when the line side layout mode of large batch parts is adjusted to the front and rear double warehouse placement state; The required length data on the line side when the layout mode of the line side of large batch parts is adjusted to the front-to-back placement state.

[0205] Specifically, after adding the double-bin placement method to make up for the problem of insufficient space for placing parts on the production line, it is calculated again whether the line side can place the parts corresponding to the standard inventory base number of parts. Double-bin placement is divided into front-to-back placement and left-to-right placement. For example, if two packages (utensils) are placed for the same part variety, the normal plan is to layout the line side according to the side-by-side double bins. If the side-by-side double bins (left-right double bins) cannot accommodate them, they are changed to front-to-back double bins. Side-by-side double bins refer to: placing two utensils parallel to the direction of the production line; front-to-back double bins refer to: placing two utensils perpendicular to the direction of the production line (a type of shelf dedicated to a certain part, some of which can be movable).

[0206] In this embodiment, the step of recalculating the required length of the logistics line side and comparing it with the actual available length of the line side includes: wherein the calculation formula is obtained: when When E i is 1, otherwise it is 0; when E j =1, the actual occupied length of the part occupied line side of the workstation with workstation number j outputs part number i; when E j =0, adjust the plan for the on-line method of the parts supplied to station number j, and enter the step of calculating the required length of the large object by the method of sequentially building the equipment.

[0207] Specifically, after the double-bin solution fails, the Shunjian equipment solution is further initiated to process large-category parts. Usually, the Shunjian equipment solution is prioritized for large-category parts. The space freed up by a large-category object can be used to place more small and medium-sized parts. Shunjian equipment is a relatively specialized tool, and its cost is higher than that of general tools or shelves, racks, etc. The shortage is mainly caused by large-category parts, and Shunjian equipment should be prioritized for large-category parts.

[0208] In this embodiment, the steps of calculating the required length of the large object in the manner of building the tool in sequence include:

[0209] Set a part data set K. When the first 7 digits of the part number i of the large category in the data set are consistent, a sequential group is generated. This group of parts corresponds to a sequential group number data Kn in the data set K; i is the part number; Kn is the sequential group number; a k is the length of the sequential equipment corresponding to the sequential group number Kn; a i is the length of the part package of part number i; where the calculation formula is: a k =max(ai )i∈K.

[0210] Specifically, in this embodiment, when the first 7 digits of the part number i of the large category in the data set are consistent, a sequential construction group is generated, that is, a standard is formulated according to the part number, and the same first 7 digits represent that the parts belong to the same type of parts, only the design details are different, and there is no impact on the assembly process. Kn is the sequential construction group number, that is, the same sequential construction group number represents that the group of parts can be sequentially constructed on the same model of equipment.

[0211] The length of Shunjian equipment also needs to be adapted to the length of the parts packaging, so as to accommodate as many large parts as possible.

[0212] In this embodiment, the steps of calculating the required length of the large object in accordance with the SPS method include:

[0213] Get the calculation formula: When the line side layout mode for large and medium-sized parts is adjusted to SPS mode, the line side space length occupied by the part with part number i; When the line side layout mode is adjusted to SPS mode for large and medium-sized parts, the line side requires length.

[0214] Specifically, it is possible that after using the Shunjian device, there are still large parts that cannot be completely included in the line side, and the SPS method is used to calculate the required length of the large parts. The SPS method is preferred for large parts, and the SPS method is secondly selected for small and medium-sized parts.

[0215] SPS method: refers to the in-factory logistics distribution mode of single-vehicle single-part supply. Load a part onto one or more material vehicles and deliver it to the designated input point of the production line at the required time, without occupying the line-side logistics area. The SPS method is a method of exchanging time for space, which needs to keep a good rhythm with the assembly progress, and is more difficult to control than placing parts on the line side. The step of calculating the required length of large objects according to the SPS method belongs to the step of sorting planning, which is different from the step of line-side planning for parts statically placed on the line side.

[0216] Figure 2 It is a structural diagram of a logistics design device for an automobile production line provided by one or more embodiments of the present invention.

[0217] like Figure 2 The automobile production line logistics design device shown includes: a step planning module, a parts screening module, a parts allocation module, a parts sorting module, and a parts storage module;

[0218] A step planning module is used for the steps of line-side planning, sorting planning, storage planning, acceptance planning and unloading planning; a parts screening module is used to obtain parts with controlled quantity, type and quality according to the steps of unloading planning and acceptance planning; a parts allocation module is used to allocate parts to the production line side according to the steps of line-side planning; a parts sorting module is used to sort the parts that are not suitable for processing in the steps of line-side planning according to the steps of sorting planning; a parts storage module is used to execute the strategy of parts stacking according to the steps of storage planning; wherein the steps of line-side planning include the steps of grouping parts according to workstations, classifying parts, and sorting parts according to part types in the logistics basic data. The steps of classifying, calculating the standard in-stock benchmark of each part for small, medium and large items, calculating the length of the line-side shelf required for small and medium-sized items, and determining which of horizontal and vertical placement occupies less length, calculating the required length of the workstation line, determining whether the line can be placed, calculating the required length of large items according to the front and rear double warehouses, recalculating the required length of the logistics line and comparing it with the actual available length on the line, calculating the required length of large items according to the method of building tools in a timely manner, recalculating the required length of the logistics line and comparing it with the actual available length on the line, and calculating the required length of large items according to the SPS method; wherein, according to the line-side planning step, a strategy for supplying parts to the production line for assembly is planned.

[0219] It is worth noting that although the present system only discloses the step planning module, the parts screening module, the parts allocation module, the parts sorting module, and the parts storage module, it does not mean that the present device is limited to the above-mentioned basic functional modules. Rather, what the present invention wants to express is that, based on the above-mentioned basic functional modules, those skilled in the art can arbitrarily add one or more functional modules in combination with the prior art to form an infinite number of embodiments or technical solutions. In other words, the present system is open rather than closed. Just because the present embodiment only discloses individual basic functional modules, it cannot be considered that the scope of protection of the claims of the present invention is limited to the above-mentioned basic functional modules.

[0220] Figure 3 A schematic diagram of line-side planning service logic according to a specific embodiment of the present invention.

[0221] Figure 4 A schematic diagram of the line-side planning algorithm steps of a specific embodiment of the present invention.

[0222] In a specific embodiment, Figure 3The line-side planning business logic shown in the figure starts with the batch entry of parts and the sequential production of parts. Based on the front and rear warehouse placement strategy, the sequential production strategy, and the SPS production strategy, the most appropriate placement method is selected based on whether the required length is greater than the actual length of the line. The logistics plan is arranged according to the placement method.

[0223] In this embodiment, based on the principle that batch delivery and sequential delivery are the most economical in online logistics planning, standard parts are shared by a large number of workstations, and a standard parts supermarket can be placed at every three workstations to provide materials.

[0224] When the available length of line logistics is not enough for all parts to be placed in batches, the placement plan is first carried out according to the double-bin adjustment method. In this method, when the material of the front tool is used up, the production line operator needs to replace the empty tool with the full tool at the back and put it in the front. This actually increases the operation process, wastes man-hours and the possibility of errors, but wastes less man-hours than the sequential construction method and SPS method.

[0225] Furthermore, the required length of logistics storage after the current rear double warehouse layout still exceeds the actual available length of the line side. Large items are supplied in a sequential manner, and the parts are grouped according to their main part numbers. Each group of parts can share one device.

[0226] When the required length of logistics storage after the large-scale logistics construction still exceeds the actual available length on the line side, the SPS sorting method is adopted to load the parts of one vehicle onto the corresponding material vehicle and deliver them to the workstation, without requiring the length on the line side.

[0227] In another specific embodiment, Figure 4 The lineside planning algorithm steps shown include:

[0228] Input: The parts are grouped according to the assembly stations in the logistics basic data, and the part number, part type (divided into standard parts, small and medium parts, and large parts), and packaging size information are obtained as input;

[0229] Step 1: Assemble the parts according to the workstations.

[0230] i: part number; j: workstation number; X ij : When part i is assembled at station j, it is 1, otherwise it is 0;

[0231] Step 2: Classify the parts (into two categories: sequential parts and non-sequential parts).

[0232] Identify whether it is a sequential part, and match the part number of the standard sequential part in the database through the part number; A i : When part i is a sequential part, it is 1, otherwise it is 0;

[0233] Step 3: Classify the parts according to the part types in the logistics basic data (divided into three categories: standard parts, small and medium-sized parts, and large parts);

[0234] According to the part type in the logistics basic data, when the part type is a standard part; B i : When part i is a standard part, it is 1, otherwise it is 0; Standard parts are placed in a 1m long shelf (the shelf is called a standard parts supermarket) for every three workstations, and are deployed in the middle of the three workstations in the order of the workstations. For example, if the workstations T1, T2, T3, T4, T5, and T6 have standard parts supermarkets placed in the T2 and T5 workstations; S j : It is 1 when there is a standard parts supermarket at the j station, otherwise it is 0; According to the part type in the logistics basic data, when the part type is small or medium-sized; C i : When part i is a small or medium object, it is 1, otherwise it is 0; The remaining part types are large objects;

[0235] Step 4: Calculate the standard in-stock benchmark for each part for small, medium and large objects;

[0236] i: part number; C si : Standard inventory base (number of boxes); C ai : The quantity of goods arriving at one time (number of boxes); C ci : Inventory cache (number of boxes); r: two-hour vehicle sequence plan fulfillment rate; C qi : Quality cache - fixed coefficient (number of boxes); C pi : Plan difference cache; C di : delay difference buffer; JPH: output of production line 1H; td i : The average delay time of part i delivery; U i :Bicycle usage; Contain i : Accommodation number (referring to the number of parts that can be placed in each package); C si =C ai +C ci ; C ci =C qi +C pi +C di ;

[0237]

[0238] Step 5: Calculate the length of the wire shelf required for small and medium-sized objects, and decide which method takes up less length: horizontal or vertical placement;

[0239] i: part number; C si : Standard base in warehouse (number of boxes); a i: Packaging length of part i, unit: mm; b i : Packaging width of part i, unit: mm; D w : represents the standard width of the scaffolding (fixed value); D li : The length of the shelf required when the long side is placed (i.e. the length of the parts package is parallel to the length of the shelf); D wi : The length of the shelf required when the long side is placed (i.e. the length of the parts package is perpendicular to the length of the shelf); lc i : When part i is a small or medium-sized object, the line side shelf length required for part i; lc i =min(D li , D wi ); Step 6: Calculate the required length of the line side of the station; i: part number; C si : Standard inventory base (number of boxes); X ij : Whether part i is assembled at workstation j; A i :Is the part a sequential part? B i :i Whether the part is a standard part; S j :Whether there is a standard parts supermarket at j station; C I : i Whether the part is small or medium-sized; lc i : When part i is a small or medium-sized object, the line side shelf length required for part i; a i : Packaging length of part i, unit: mm; b i : Packaging width of part i, unit: mm; l i : The length of the line side space occupied by part i; L j : The required length of the line side when all parts of station j are arranged according to the planning scheme; Lf j : The actual available length of station j; l i =A i ×2×a i +(1-A i )×S j ×1000+(1-A i )×(1-B i )×C i ×lc i +(1-A i )×(1-B i )×(1-C i )×C si ×a i ;

[0240] Step 7: Determine whether the line side can be placed;

[0241] D i :When L j<Lf j 1 when it is, otherwise 0; When D i =1, j station has met the line side layout requirements, output C si , A i , B i , S i , C i , L j When D i =0, adjust the method of putting parts on line at station j and go to step 8;

[0242] Step 8: Calculate the required length of the large object based on the front and rear double warehouses;

[0243] i: part number; b: i : Packaging width of part i, unit: mm; W j : Available width of the line side of station j, unit: mm; Q i :When b i ×2 <W j 1 when it is, otherwise 0;

[0244] Step 9: Recalculate the required length of the logistics line side and compare it with the actual available length of the line side;

[0245] i: part number; C si : Standard inventory base (number of boxes); X ij : Whether part i is assembled at workstation j; A i :Is the part a sequential part? B i :i Whether the part is a standard part; S j :Whether there is a standard parts supermarket at j station; C i :iWhether the part is small or medium-sized; Q i : i Whether the parts can be placed in the front and rear bins; lc i : When part i is a small or medium-sized object, the length of the line side shelf required for part i; a i : Packaging length of part i, unit: mm; b i : Packaging width of part i, unit: mm; l i : The length of the line side space occupied by part i; L j : The required length of the line side when all parts of station j are arranged according to the planning scheme; Lf j : The actual available length of station j; When the layout mode of the line side of batch large parts is adjusted to the front and rear double warehouse mode, the length of the line side space occupied by part i; When the layout mode of the line side of large batch parts is adjusted to the front and rear double warehouse mode, the required length of the line side;

[0246] E i :when When , it is 1, otherwise it is 0; When E j =1, j station, the actual occupied length of the output part i on the line side; when E j =0, adjust the method of putting parts on line at station j and go to step 10;

[0247] Step 10: Calculate the required length of the large object in the same way as the equipment is built;

[0248] Set data set K. When the first seven digits of the part numbers of the large objects are the same, the group of parts corresponds to one piece of data in data set K.

[0249] i: part number; K: part serial number; a k : The longitudinal length of the component group K, unit: mm; a i : Packaging length of part i, unit: mm; a k =max(a i )i∈k;

[0250] Step 11: Recalculate the required length of the logistics line side and compare it with the actual available length of the line side;

[0251] i: part number; K: part serial number; X ij : Whether part i is assembled at workstation j;

[0252] A i :Is the part a sequential part? B i :i Whether the part is a standard part; S j :Whether there is a standard parts supermarket at j station; C i : i Whether the part is small or medium-sized; lc i : When part i is a small or medium-sized object, the length of the line side shelf required for part i; a i : Packaging length of part i, unit: mm; a k : The length of the tool of the parts group K, unit: mm; When the layout mode of the large part line side is adjusted to the sequential construction mode, the length of the line side space occupied by part i; When the layout mode of the large parts line is adjusted to the sequential construction mode, the required length of the line side;

[0253] F i :when When , it is 1, otherwise it is 0; When F j =1, j station, the actual occupied length of the output part i on the line side When F j =0, adjust the method of putting parts on line at station j and go to step 12;

[0254] Step 12: Calculate the required length of the large object according to the SPS method;

[0255] When the line-side layout mode of large and medium-sized parts is adjusted to SPS mode, the length of the line-side space occupied by part i; When the layout mode of large and medium-sized parts is adjusted to SPS mode, the required length of the line side;

[0256] In this embodiment, a detailed formula is provided for length calculation of the line-side layout planning, and the line-side length of each part is output. The formula is implanted into the system so that the system can directly calculate and save a lot of man-hours.

[0257] Figure 5 A block diagram of an electronic device structure of a method for designing logistics for an automobile production line provided by one or more embodiments of the present invention.

[0258] like Figure 5 As shown, the present application provides an electronic device, including: a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other through the communication bus;

[0259] A computer program is stored in the memory. When the computer program is executed by the processor, the processor executes the steps of a method for designing logistics of an automobile production line.

[0260] The present application also provides a computer-readable storage medium storing a computer program executable by an electronic device. When the computer program runs on the electronic device, the electronic device executes the steps of a method for designing logistics for an automobile production line.

[0261] The present application also provides a vehicle, comprising:

[0262] Electronic equipment for implementing the steps of a logistics design method for an automobile production line;

[0263] A processor, the processor runs a program, and when the program runs, data output from the electronic device executes the steps of the automobile production line logistics design method;

[0264] The storage medium is used to store a program, and when the program is running, it executes the steps of the automobile production line logistics design method for the data output from the electronic device.

[0265] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments may still be modified, or some or all of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for designing logistics of automobile production lines, characterized in that: The automobile production line logistics design method comprises: a line-side planning step, a sorting planning step, a storage planning step, an acceptance planning step and a unloading planning step; wherein, according to the steps of the unloading planning and the steps of the acceptance planning, parts with controlled quantity, type and quality are obtained; Allocate parts to the production line side according to the steps of the line side planning; Sorting out the parts that are not suitable for processing in the steps of the line-side planning according to the steps of the sorting planning; Execute a parts stacking strategy according to the steps of the storage planning; The line-side planning step includes the steps of grouping parts according to workstations, classifying parts, classifying parts according to part types in logistics basic data, calculating the standard in-stock benchmark for each part for small and medium-sized items and large items, calculating the line-side shelf length required for small and medium-sized items, and determining which method of horizontal placement and vertical placement occupies less length, calculating the required length of the workstation line side, determining whether the line side can be placed, calculating the required length of large items according to the front and rear double warehouses, recalculating the required length of the logistics line side and comparing it with the actual available length of the line side, calculating the required length of large items according to the method of building tools in a timely manner, recalculating the required length of the logistics line side and comparing it with the actual available length of the line side, and calculating the required length of large items according to the SPS method; Wherein, according to the steps of the line-side planning, a strategy for supplying parts to the production line for assembly is planned.

2. The automobile production line logistics design method according to claim 1 is characterized in that: The step of grouping the parts according to the workstations comprises: Obtain information on basic logistics data; According to the basic logistics data, information on part serial number, part type and part packaging size is obtained; Get information about assembly station data; According to the assembly station data, the parts are grouped and processed; According to the result of the said collecting and processing of the parts, the said step of classifying the parts is input; Among them, according to the collection processing of parts, the formula is obtained: Where i is the part number; j is the station number; X ij It is the assembly status of the part with part number i at the workstation with workstation number j, where the assembly of the part with part number i at the workstation with workstation number j is represented by 1, otherwise it is 0.

3. The automobile production line logistics design method according to claim 1 is characterized in that: The step of classifying the parts comprises: Obtain parts matching database; The parts matching database includes the part numbers of standard sequential parts. Determine whether the part with the current part number i is a sequential part according to the part matching database; If, yes, then the part with the current part number i is the result of the sequential part and is sent to the step of calculating the required length on the workstation line side; If, no, the result that the part with the current part number i is not a sequential part is sent to the classification of the parts according to the part type in the logistics basic data; Among them, the formula is obtained: Among them, when the part number i is a sequential part, A i is 1 if the value is true, otherwise it is 0.

4. The automobile production line logistics design method according to claim 1 is characterized in that: The step of classifying parts according to the part types in the logistics basic data includes: The parts matching database also includes classification information of part types; The classification information of the part types includes classification information of standard parts, small and medium-sized parts, and large parts; According to the result that the part with the current part number i is not a sequential part, the part with the current part number i is classified according to the classification information of the part type; Determine whether the part with the current part number i is a standard part; If, yes, then the part is stored according to the preset standard part placement position; If,not, then determine whether the part with the current part number i is a part of the small or medium category; If, yes, then the part is stored according to the preset small and medium-sized object placement position; If,not, then determine whether the part with the current part number i is a part of the large category; If,yes, then the part is stored according to the preset medium and large category placement position; The parts are stored according to the preset standard parts placement positions to form a standard parts supermarket; Among them, the formula is obtained: When the part number i is a standard part, B i is 1, otherwise it is 0; Among them, the formula is obtained: When the station with station number j has a standard parts supermarket, S j is 1, otherwise it is 0; Among them, the formula is obtained: When the part number i is a small or medium-sized part, C i is 1, otherwise it is 0; Among them, when B i is 0 and C i is 0, then the part with part number i is a part of the large category.

5. The automobile production line logistics design method according to claim 1 is characterized in that: The step of calculating the standard in-stock benchmark of each part for small, medium and large objects includes: Get the calculation formula: in, i is the part number; C si The standard stock base quantity of the part with part number i; C ai The number of parts with part number i arriving in each batch; C ci The number of caches left in the library for the part with part number i; r is the vehicle sequence plan fulfillment rate in the preset time period; C qi is the part quality cache amount of part number i; C pi is the planned difference buffer size of the part with part number i; C di is the part delay difference cache amount of part number i; JPH is the output per unit time of the production line; td i is the average delay time for parts with part number i to be delivered to the production line; U i The bicycle usage of the part with part number i; Contain i is the number of parts stored with part number i.

6. The automobile production line logistics design method according to claim 1 is characterized in that: The steps of calculating the length of the wire shelf required for small and medium-sized objects and determining whether horizontal placement or vertical placement takes up less length include: Get the calculation formula: lc i =min(D li , D wi ); i is the part number; C si The standard stock base quantity of the part with part number i; a i is the packaging length of the part with part number i; b i is the packaging width of the part with part number i; D w is the standard width of the scaffolding; D li The length of the shelf required when the long sides of the packages are placed parallel; D wi The length of the shelf required when the long side of the package is placed vertically; lc i is the line side shelf length required for part number i when the part with part number i is a small or medium-sized item.

7. The automobile production line logistics design method according to claim 1 is characterized in that: The step of calculating the required length of the workstation line side includes: Get the calculation formula: i is the part number; C si The standard stock base quantity of the part with part number i; X ij The assembly status of the part with part number i at the workstation with workstation number j; A i Whether the part with part number i is a sequential part; B i The status of whether the part with part number i is a standard part; S j Whether the station with part number i and station number j has a standard parts supermarket status; C i Whether the part with part number i is a small or medium-sized item; lc i is the line side shelf length required for the part with part number i when the part with part number i is a small or medium-sized object; a i is the packaging length of the part with part number i; b i is the packaging width of the part with part number i; l i The length of the line side space occupied by the part with part number i; L j It is the required line length when all parts of the workstation with workstation number j are laid out according to the preset plan.

8. The automobile production line logistics design method according to claim 1 is characterized in that: The step of determining whether the line side can be placed comprises: Get the calculation formula: When L j <Lf j When D i is 1, otherwise it is 0; When D i =1, the station with station number j meets the line side layout requirements, the original input C si , A i , B i , S j , C i , The algorithm calculates L j data; When D i =0, adjust the method of feeding parts to station number j, and enter the step of calculating the required length of the large object according to the front and rear double bins; Among them, Lf j is the actual available length of the workstation with workstation number j.

9. The automobile production line logistics design method according to claim 1 is characterized in that: The step of calculating the required length of the large object according to the front and rear double warehouses includes: Get the calculation formula: i is the part number; C si The standard stock base quantity of the part with part number i; X ij The assembly status of the part with part number i at the workstation with workstation number j; A i Whether the part with part number i is a sequential part; B i The status of whether the part with part number i is a standard part; S j Whether the station with part number i and station number j has a standard parts supermarket status; C i Whether the part with part number i is a small or medium-sized item; Q i Whether the part with part number i can be placed in both front and rear bins; lc i is the line side shelf length required for the part with part number i when the part with part number i is a small or medium-sized object; a i is the packaging length of the part with part number i; b i is the packaging width of the part with part number i; l i The length of the line side space occupied by the part with part number i; L j The required line length of all parts at the station with station number j when they are laid out according to the preset plan; Lf j is the actual available length of the workstation with workstation number j; The length data of the line side space occupied by the part with part number i when the line side layout mode of large batch parts is adjusted to the front and rear double warehouse placement state; The required length data of the line side when the layout mode of the line side of large batch parts is adjusted to the front-to-back placement state; The step of recalculating the required length of the logistics line side and comparing it with the actual available length of the line side includes: Among them, obtain the calculation formula: when When E i is 1, otherwise it is 0; When E j =1, the actual occupied length of the part occupied line side of the workstation with workstation number j outputting part number i; When E j = 0, adjust the method of feeding the parts of the station with the serial number j, and enter the step of calculating the required length of the large object according to the method of sequentially building the equipment; The step of calculating the required length of the large object in accordance with the method of building the tool in sequence comprises: Set a part data set K. When the first 7 digits of the part number i of the large category in the data set are consistent, a sequential group is generated. The group of parts corresponds to a sequential group number data Kn in the data set K. i is the part number; Kn is the sequential group number; a k The length of the sequential equipment corresponding to the sequential group number Kn; a i The length of the part package with part number i; Among them, the calculation formula is: a k =max(a i )i∈K.

10. The automobile production line logistics design method according to claim 1, characterized in that: The step of calculating the required length of the large object in accordance with the SPS method comprises: Get the calculation formula: When the line side layout mode for large and medium-sized parts is adjusted to SPS mode, the line side space length occupied by the part with part number i; When the line side layout mode is adjusted to SPS mode for large and medium-sized parts, the line side requires length.

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