CN120816365B - Using method of gantry production line for improving material handling precision - Google Patents

Abstract

The invention provides a using method of a gantry production line for improving material handling precision, which belongs to the technical field of machining and comprises the following steps of S1, binding a workpiece lifted by a loading and unloading station and then with a tray, transferring the workpiece to a truss area, S2, transferring the truss to a pre-adjusting station, scanning and comparing blank data and pre-adjusting a standard, S3, dispatching the truss by a central control system to accurately convey the tray to a machining center, enabling repeated positioning precision to be less than or equal to 0.03mm through multistage positioning, S4, after four-axis rough machining, transferring the truss to five-axis for high-precision machining, S5, controlling the whole process by the central control system, S6, processing the workpiece by a cleaning station after machining, and returning the workpiece to the loading and unloading station for disassembly. The invention can improve the processing precision and efficiency through high-precision positioning, intelligent pre-adjustment and full-flow control, thereby realizing flexible production of multiple varieties and meeting the requirements of high-end manufacture on high efficiency, precision and flexibility.

Description

Using method of gantry production line for improving material handling precision

Technical Field

The invention relates to the technical field of machining, in particular to a use method of a gantry production line for improving material handling precision.

Background

Along with the continuous development of digitization and intellectualization of manufacturing industry, the high-end manufacturing field puts higher demands on the automation degree, flexible production capacity and space utilization rate of processing equipment. Especially, the traditional production mode is difficult to meet the high-efficiency, accurate and flexible production demands facing the processing tasks with multiple varieties, small batches and high complexity.

In the prior art, china patent with the application publication number of CN111069978A discloses an automatic production line of a bridge gantry machining center, and although the production line can realize the collaborative operation of a plurality of machining centers through a ground workpiece transmission line, in the actual use process, the technical problems still exist that firstly, a detection center is only used for detecting a workpiece after machining and lacks a pretreatment and allowance optimization mechanism for a workpiece clamping reference before machining, so that the workpiece needs to be repeatedly subjected to detection-machining process circulation, the production period is prolonged, and secondly, the tool management is mainly based on static configuration of tool parameters of a process file, the machining strategy cannot be dynamically adjusted to optimize the tool loss, and the machining stability is limited.

Aiming at logistics transportation, in the prior art, china patent with the application publication number CN119916757A discloses a truss logistics control method, device, terminal and medium of a large-scale five-axis gantry production line, and although the control method can improve the positioning precision of truss trolleys through a laser range finder, the technology is only focused on the motion control of single trolleys, so that the core requirement of repeated positioning precision within 0.03mm of a heavy truss is difficult to solve, and the truss logistics control method is not integrated with a processing center and a cutter management system, lacks the whole-flow logistics scheduling capability, and is difficult to adapt to flexible production scenes.

In addition, the traditional ground rail type RGV (such as a rail guided vehicle) and other ground transmission structures can realize logistics automation, but have large occupied area and restrict the layout flexibility of a production line, meanwhile, the existing production line generally has the problem of insufficient equipment cooperativity, rough machining and finish machining are mostly finished by single equipment, the performance advantages of different types of machine tools cannot be exerted, the cutter management is mostly in a single machine tool magazine mode, the cutter changing efficiency is low, and the flexibility of resource allocation is poor.

Therefore, a novel gantry machining production line integrating high-precision truss logistics, pre-machining reference pre-adjustment, four-axis/five-axis cooperative machining and intelligent control is needed, so that the problems of insufficient positioning precision, redundancy in process flow and poor equipment cooperativity in the prior art are solved, and the requirements of the high-end manufacturing field on efficient, accurate and flexible production are met.

Disclosure of Invention

The invention aims to overcome the defects of low truss logistics positioning precision, redundant process flow and poor equipment cooperativity of the existing production line, and provides a use method of a gantry production line for improving material handling precision.

The invention is realized by the following technical scheme that the application method of a gantry production line for improving the material handling precision comprises a cleaning station, a cutter management system, a five-axis linkage gantry machining center, a buffer station, a centralized chip removal and liquid supply system, a truss logistics system, a loading and unloading station, a pre-adjustment station and a four-axis linkage gantry machining center, and further comprises the following steps:

s1, hoisting a workpiece blank to a loading and unloading area through lifting equipment of the loading and unloading station, binding the workpiece blank with a pallet with a mark after initial clamping, and transferring the workpiece blank to a loading and unloading transfer area of a truss logistics system through a transfer trolley of the loading and unloading station;

S2, the transport trolley of the truss logistics system grabs a pallet of the bound workpiece, transfers the pallet to a pre-adjustment transport trolley of a pre-adjustment station, the pre-adjustment station obtains workpiece blank shape data through a configured three-dimensional scanning manipulator and compares the workpiece blank shape data with a theoretical model, calculates machining allowance distribution and offset, and pre-adjusts a workpiece reference through a configured reference correction unit;

S3, a central control system of the production line dispatches the truss logistics system to accurately convey the tray to a target machining center according to a preset result and a production plan, and a movable tray of the truss logistics system is matched with a fixed tray of the machining center through a multi-stage positioning mechanism, so that the repeated positioning accuracy of the tray can be controlled within 0.03 mm;

S4, the four-axis linkage gantry machining center performs rough machining on the pre-adjusted workpiece, and the workpiece is transported to the five-axis linkage gantry machining center by the truss logistics system to perform high-precision curved surface machining after finishing the rough machining;

S5, controlling all links in the whole process by the central control system, wherein the links comprise workpiece information tracking, equipment load distribution, cutter wear monitoring and logistics path dynamic optimization;

s6, transferring the processed workpiece to a cleaning station by a truss logistics system, returning to a loading and unloading station to complete disassembly after high-pressure spraying and air drying treatment, and conveying the finished product to a warehousing system or an assembly line.

The method comprises the steps of finishing initial clamping and pallet binding of a workpiece through a loading and unloading station, transferring the workpiece to a pre-adjusting station through a truss logistics system for standard pre-adjusting and allowance optimizing, dispatching truss logistics through a central control system, accurately conveying the workpiece to a four-axis/five-axis machining center for rough machining and finish machining, managing and controlling the whole process through the central control system in the whole process, and finally returning the workpiece to the loading and unloading station after being processed through a cleaning station. The method realizes full-flow automation from blank to finished product, reduces detection-processing cycle through the pre-adjusting station, and realizes high-precision positioning and equipment cooperative processing of truss logistics within 0.03mm, thereby greatly improving production efficiency, processing precision and product quality consistency, reducing manual intervention, and adapting to flexible production requirements of multiple varieties and small batches.

In step S1, the lifting device is a suspension intelligent lifting device, and the information binding between the workpiece and the tray is realized through an RFID chip or a two-dimensional code.

In step S2, the pre-adjustment station scans the workpiece blank by using a laser three-dimensional scanner to generate a digital model, analyzes the deformation condition by using an intelligent algorithm, and determines deflection and offset data to ensure the uniformity of machining allowance.

In step S2, the reference correction unit processes the coarse reference and the fine reference by five-axis milling according to the scanning result, and performs precision rechecking on the corrected reference by using a laser scanner.

In step S3, the multistage positioning mechanism comprises a cylindrical cone guide pin, a diamond cone guide pin and a zero point positioning system, wherein the cylindrical cone guide pin and the diamond cone guide pin are respectively arranged at two ends of the top of the fixed tray, the zero point positioning system is uniformly arranged at the top of the fixed tray, the bottom of the movable tray is provided with pin holes corresponding to the cylindrical cone guide pin and the diamond cone guide pin and blind nails corresponding to the zero point positioning system, and the pin holes and the blind nails at the bottom of the movable tray can be accurately positioned by matching the cylindrical cone guide pin, the diamond cone guide pin and the zero point positioning system at the top of the fixed tray through the action of the lifting mechanism of the truss logistics system.

In step S3, the truss logistics system adopts an X-direction motor to drive rollers and a Z-direction double-servo motor to drive synchronous lifting, and the claw on the lifting mechanism can be automatically opened and closed to grasp the tray lifting appliance.

The truss logistics system detects the position in real time through the laser range finder, and optimizes the transfer path by combining with global scheduling of the central control system.

In step S4, the five-axis linkage gantry machining center adopts a double-swing-head structure and a real-time temperature compensation system, wherein the double-swing-head structure is used for realizing X, Y, Z, A, C five-axis linkage to machine a complex curved surface, and the temperature compensation system is used for reducing thermal deformation errors.

In a further improvement of the invention, in step S5, the central control system is linked with the tool management system, and the tool is dynamically scheduled by combining the wear monitoring data through RFID (radio frequency identification) identification of the tool information.

In a further development of the invention, in step S6, the central control system simultaneously dispatches the parts on the idle buffer station to the machining center to be machined while the cleaning process is performed.

The beneficial effects of the invention are as follows:

1. The pre-adjustment station in the method adopts laser three-dimensional scanning and an intelligent algorithm to perform reference pre-adjustment and allowance optimization on the workpiece blank, combines precision review of a reference correction unit, reduces machining deviation caused by clamping errors from the source, and simultaneously realizes repeated positioning precision within 0.03mm through a multi-stage positioning mechanism by a truss logistics system, and ensures micron-level precision stability of complex curved surface machining by matching with a double-swinging-head structure and a temperature compensation system of a five-axis linkage machining center. The whole set of precision control mechanism effectively reduces the rejection rate and controls the fluctuation of the product quality in a very small range.

2. The method greatly improves the overall efficiency of the production line by optimizing the production flow and the resource scheduling. The four-axis and five-axis machining center cooperatively divide work, realizes specialized processing of rough machining and finish machining, fully plays the performance advantages of different equipment, reduces equipment idling and waiting time by a global scheduling and parallel operation mechanism (such as synchronous cleaning procedure and part transferring) of a central control system, and shortens non-cutting time by dynamic allocation of an intelligent tool management system. The measures act together, so that the production period is obviously shortened, the equipment utilization rate is improved, and the high-efficiency production requirements of multiple varieties and small batches are effectively met.

3. Compared with the traditional ground RGV and other ground transmission structures, the truss type logistics system in the method can save the occupied area, breaks through the limitation of the layout of the field, reduces manual intervention through full-flow automatic operation, combines the information binding mechanism of the workpiece and the tray, and realizes traceability and quick production change of the production process. The high-flexibility production mode can meet the processing requirements of high-precision complex parts, can flexibly cope with dynamic changes of market orders, and provides an efficient and intelligent solution for the high-end manufacturing field.

Drawings

In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the description will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a gantry production line according to an embodiment of the present invention.

Fig. 2 is a schematic view of a loading and unloading station according to an embodiment of the present invention.

Fig. 3 is a schematic diagram of the structure of a pre-conditioning station according to an embodiment of the invention.

FIG. 4 is a schematic diagram of a multi-stage positioning mechanism according to an embodiment of the present invention.

In the figure, a cleaning station, a cutter management system, a five-axis linkage gantry machining center, a buffer station, a concentrated chip removal and liquid supply system, a truss logistics system, 601, a movable tray, 7, a loading and unloading station, 701, lifting equipment, 8, a pre-adjustment station, 801, a pre-adjustment transfer trolley, 802, a three-dimensional scanning manipulator, 803, a reference correction unit, 9, a four-axis linkage gantry machining center, 10, a fixed tray, 1001, a cylindrical cone guide pin, 1002, a diamond cone guide pin, 1003 and a zero point positioning system are arranged.

Detailed Description

In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions of the present invention will be clearly and completely described below with reference to the drawings in this specific embodiment, and it is apparent that the embodiments described below are only some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, based on the embodiments in this patent, which would be within the purview of one of ordinary skill in the art without the particular effort to make the invention are intended to be within the scope of the patent protection.

Referring to fig. 1-4, in combination with a specific embodiment, the gantry production line disclosed by the invention comprises a cleaning station 1, a cutter management system 2, a five-axis linkage gantry machining center 3, a buffer station 4, a centralized chip removal and liquid supply system 5, a truss logistics system 6, a loading and unloading station 7, a preset station 8 and a four-axis linkage gantry machining center 9, wherein the five-axis linkage gantry machining center 3 and the four-axis linkage gantry machining center 9 are respectively arranged at two ends of the truss logistics system 6, the preset station 8 and the loading and unloading station 7 are sequentially arranged at one side of the four-axis linkage gantry machining center 9 corresponding to the five-axis linkage gantry machining center 3, the cleaning station 1 is arranged at one side of the five-axis linkage gantry machining center 3 corresponding to the four-axis linkage gantry machining center 9, the center of the truss logistics system 6 is provided with the centralized chip removal and liquid supply system 5 close to the cleaning station 1, the cutter management system 2 is arranged at the outer side of the cleaning station 1, and the buffer station 4 is arranged between the cleaning station 1 and the five-axis gantry machining center 3.

The invention relates to a use method of a gantry production line for improving material handling precision, which comprises the following steps:

S1, referring to FIGS. 1 and 2, hoisting a workpiece blank to a loading and unloading area through lifting equipment 701 of a loading and unloading station 7, binding the workpiece blank with a tray with a mark after initial clamping, and transferring the workpiece blank to a loading and unloading transfer area of a truss logistics system 6 through a transfer trolley of the loading and unloading station 7;

S2, referring to FIG. 3, a transport trolley of the truss logistics system 6 grabs a pallet of the bound workpiece, transfers the pallet to a pre-adjustment transport trolley 801 of a pre-adjustment station 8, the pre-adjustment station 8 acquires workpiece blank shape data through a configured three-dimensional scanning manipulator 802 and compares the workpiece blank shape data with a theoretical model, calculates machining allowance distribution and offset, and pre-adjusts a workpiece reference through a configured reference correction unit 803;

S3, referring to FIG. 4, a central control system of the production line dispatches the truss logistics system 6 to accurately convey the tray to a target machining center according to a preset result and a production plan, and the movable tray 601 of the truss logistics system 6 is matched with a fixed tray 10 of the machining center through a multi-stage positioning mechanism, so that the repeated positioning accuracy of the tray can be controlled within 0.03 mm;

S4, the four-axis linkage gantry machining center 9 performs rough machining on the pre-adjusted workpiece, and the workpiece is transported to the five-axis linkage gantry machining center 3 by the truss logistics system 6 to perform high-precision curved surface machining after finishing the rough machining;

S5, controlling all links in the whole process by the central control system, wherein the links comprise workpiece information tracking, equipment load distribution, cutter wear monitoring and logistics path dynamic optimization;

S6, transferring the processed workpiece to the cleaning station 1 by the truss logistics system 6, returning to the loading and unloading station 7 to complete disassembly after high-pressure spraying and pneumatic drying treatment, and conveying the finished product to a warehouse system or an assembly line.

The method comprises the steps of finishing initial clamping and pallet binding of a workpiece through a loading and unloading station 7, transferring the workpiece to a pre-adjusting station 8 through a truss logistics system 6 for standard pre-adjusting and allowance optimizing, dispatching truss logistics through a central control system, accurately conveying the workpiece to a four-axis/five-axis machining center for rough machining and finish machining, managing and controlling the whole process through the central control system in the whole process, and finally returning the workpiece to the loading and unloading station 7 after being processed through a cleaning station 1. The method realizes full-flow automation from blank to finished product, reduces the cycle of detection-processing procedures through the pre-adjusting station 8, and realizes high-precision positioning and equipment cooperative processing within 0.03mm of truss logistics, thereby greatly improving the production efficiency, processing precision and product quality consistency, reducing manual intervention, and adapting to the requirements of flexible production of multiple varieties and small batches.

Specifically, in step S1, the lifting device 701 is a suspension intelligent lifting device, and the information binding between the workpiece and the tray is implemented through an RFID chip or a two-dimensional code.

In the step S1, a suspension intelligent lifting device is adopted to lift the workpiece, and the workpiece is bound with the tray through the RFID chip or the two-dimensional code, so that automatic identification and tracking of the workpiece information are realized. Above-mentioned intelligent hoisting device of suspension reduces artifical hoist and mount intensity of labour, and the information binding mechanism ensures that work piece full life cycle is traceable, can reduce artifical recording error to and promote the automation and the intelligent level of clamping link.

Specifically, in step S2, the pre-adjustment station 8 scans the workpiece blank by using a laser three-dimensional scanner to generate a digital model, analyzes the deformation condition by using an intelligent algorithm, and determines deflection and offset data to ensure that the machining allowance is uniform.

In the step S2, the pre-adjustment station 8 acquires the workpiece blank shape data through a laser three-dimensional scanner, generates a digital model, compares the digital model with a theoretical model, analyzes deformation and allowance distribution through an intelligent algorithm, and determines offset to ensure that machining allowance is uniform. The laser scanning and the intelligent algorithm are combined, so that automatic pre-adjustment of blank references can be realized, errors of manual calibration are avoided, uniform distribution of machining allowance is ensured, rejection rate of subsequent machining caused by uneven allowance is reduced, and production period is shortened.

Specifically, in step S2, the reference correction unit 803 processes the coarse reference and the fine reference by five-axis milling according to the scanning result, and performs precision review on the corrected reference by using a laser scanner.

In step S2, the reference correction unit 803 performs rough and fine references by five-axis milling according to the scanning result, and then checks the corrected reference accuracy by a laser scanner. The double guarantee of milling and laser rechecking can ensure the reference precision of the workpiece, avoid machining deviation caused by reference error and further improve the dimensional precision and stability of subsequent machining.

Specifically, in step S3, the multi-stage positioning mechanism includes a cylindrical cone guide pin 1001, a diamond cone guide pin 1002 and a zero point positioning system 1003, where the cylindrical cone guide pin 1001 and the diamond cone guide pin 1002 are respectively disposed at two ends of the top of the fixed tray 10, the zero point positioning system 1003 is uniformly disposed at the top of the fixed tray 10, the bottom of the movable tray 601 is provided with pin holes corresponding to the cylindrical cone guide pin 1001 and the diamond cone guide pin 1002 and blind pins corresponding to the zero point positioning system 1003, and the pin holes and blind pins at the bottom of the movable tray 601 can be precisely positioned by matching with the cylindrical cone guide pin 1001, the diamond cone guide pin 1002 and the zero point positioning system 1003 at the top of the fixed tray 10 through the action of the lifting mechanism of the truss logistics system 6.

In the step S3, preliminary positioning is realized through the cooperation of a cylindrical cone guide pin 1001 and a diamond cone guide pin 1002 on the fixed tray 10 and a pin hole of the movable tray 601, accurate locking is finished through the cooperation of a zero point positioning system 1003 and a blind rivet, and the repeated positioning precision is controlled within 0.03mm by combining the action of a truss lifting mechanism. Through multistage positioning mechanism's synergism, can solve the bottleneck that traditional truss positioning accuracy is not enough, satisfy the industry master machine and to the demand of tray high accuracy exchange, provide basic guarantee for high accuracy processing.

Specifically, in step S3, the truss logistics system 6 adopts an X-direction motor to drive rollers and a Z-direction dual-servo motor to drive and synchronously lift, and the claw on the lifting mechanism can be automatically opened and closed to grasp the tray lifting appliance.

In the step S3, the truss logistics system 6 realizes horizontal movement by driving rollers through an X-direction motor, and Z-direction double servo motors drive synchronous lifting, and the clamping jaws of the lifting mechanism are automatically opened and closed to grab/release the tray lifting appliance. Through X/Z to independent drive and automatic jack catch design, can promote truss commodity circulation's motion stability and degree of automation, adaptable heavy work piece's high-efficient transport reduces manual intervention simultaneously, improves commodity circulation transfer efficiency.

Specifically, the truss logistics system 6 detects the position in real time through a laser range finder, and optimizes the transfer path in combination with global scheduling of the central control system.

The truss logistics system 6 detects position information in real time through the laser range finder, optimizes the transfer path by combining a global scheduling algorithm of the central control system, and realizes accurate and efficient transfer of the trays. The laser ranging real-time positioning device can improve position detection precision, overall path optimization reduces logistics waiting time, can adapt to dynamic scheduling requirements of multi-variety production, and improves overall logistics efficiency of a production line.

Specifically, in step S4, the five-axis linkage gantry machining center 3 adopts a dual-swing-head structure and a real-time temperature compensation system, the dual-swing-head structure is used for realizing X, Y, Z, A, C five-axis linkage to machine a complex curved surface, and the temperature compensation system is used for reducing thermal deformation errors.

In the step S4, the five-axis linkage gantry machining center 3 realizes X, Y, Z, A, C five-axis linkage through a double-swinging-head structure, meets the machining requirement of complex curved surfaces, and dynamically corrects thermal deformation errors by a real-time temperature compensation system. The double-swinging-head structure can expand the processing capability of complex curved surfaces, the temperature compensation system can reduce the influence of environmental temperature change on the processing precision, and the stability of micrometer precision of long-time processing can be ensured.

Specifically, in step S5, the central control system is linked with the tool management system 2, and dynamically schedules the tools by identifying the tool information through RFID and combining the wear monitoring data.

In step S5, the central control system is linked with the tool management system 2, and dynamically dispatches tools, such as changing worn tools, and matching optimal tool parameters, by combining real-time wear monitoring data through RFID identification tool information. The intelligent management and dynamic allocation of the cutter are realized, the machining defects caused by cutter abrasion can be reduced, the utilization rate of the cutter is improved, the non-cutting time is shortened, and the machining stability is ensured.

Specifically, in step S6, while the cleaning process is performed, the central control system synchronously schedules the parts on the idle buffer station 4, and transfers the parts to the machining center to be machined.

In step S6, when the cleaning process is performed, the central control system synchronously schedules the idle parts of the buffer station 4 to the machine tool to be processed, so as to implement parallel operations of processing and cleaning. The machine tool material waiting machine can reduce the downtime of the machine tool for waiting materials, optimize the production beat, fully utilize the equipment productivity and improve the overall operation efficiency of the production line.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. The application method of the gantry production line for improving the material handling precision comprises a cleaning station (1), a cutter management system (2), a five-axis linkage gantry machining center (3), a buffer station (4), a centralized chip removal and liquid supply system (5), a truss logistics system (6), a loading and unloading station (7), a pre-adjustment station (8) and a four-axis linkage gantry machining center (9), and is characterized by further comprising the following steps:

S1, hoisting a workpiece blank to a loading and unloading area through lifting equipment (701) of a loading and unloading station (7), binding the workpiece blank with a tray with a mark after initial clamping, and transferring the workpiece blank to a loading and unloading transfer area of a truss logistics system (6) through a transfer trolley of the loading and unloading station (7);

S2, a transport trolley of the truss logistics system (6) grabs a pallet of the bound workpiece, the pallet is transported to a pre-adjustment transport trolley (801) of a pre-adjustment station (8), the pre-adjustment station (8) acquires workpiece blank shape data through a configured three-dimensional scanning manipulator (802) and compares the workpiece blank shape data with a theoretical model, machining allowance distribution and offset are calculated, and then a workpiece reference is pre-adjusted through a configured reference correction unit (803);

S3, a central control system of the production line dispatches the truss logistics system (6) to accurately convey the tray to a target machining center according to a preset result and a production plan, and a movable tray (601) of the truss logistics system (6) is matched with a fixed tray (10) of the machining center through a multistage positioning mechanism, so that the repeated positioning precision of the tray can be controlled within 0.03 mm;

s4, the four-axis linkage gantry machining center (9) performs rough machining on the pre-adjusted workpiece, and the workpiece is transported to the five-axis linkage gantry machining center (3) by the truss logistics system (6) to perform high-precision curved surface machining after finishing;

S5, controlling all links in the whole process by the central control system, wherein the links comprise workpiece information tracking, equipment load distribution, cutter wear monitoring and logistics path dynamic optimization;

s6, transferring the processed workpiece to a cleaning station (1) through a truss logistics system (6), returning to a loading and unloading station (7) to complete disassembly after high-pressure spraying and pneumatic drying treatment, and conveying the finished product to a warehouse system or an assembly line.

2. The method of claim 1, wherein in step S1, the lifting device (701) is a suspension intelligent lifting device, and the information binding between the workpiece and the tray is realized by using an RFID chip or a two-dimensional code.

3. The method according to claim 1, wherein in step S2, the pre-adjustment station (8) scans the workpiece blank by using a laser three-dimensional scanner to generate a digital model, and the deformation condition is analyzed by an intelligent algorithm to determine deflection and offset data so as to ensure the uniformity of the machining allowance.

4. A method according to claim 3, wherein in step S2, the reference correction unit (803) processes the coarse reference and the fine reference by five-axis milling according to the scanning result, and uses a laser scanner to perform precision review on the corrected reference.

5. The method for using the gantry production line for improving the material handling precision according to claim 1, wherein in the step S3, the multistage positioning mechanism comprises a cylindrical cone guide pin (1001), a diamond cone guide pin (1002) and a zero point positioning system (1003), the cylindrical cone guide pin (1001) and the diamond cone guide pin (1002) are respectively arranged at two ends of the top of the fixed tray (10), the zero point positioning system (1003) is uniformly arranged at the top of the fixed tray (10), the bottom of the movable tray (601) is provided with pin holes corresponding to the cylindrical cone guide pin (1001) and the diamond cone guide pin (1002) and blind pins corresponding to the zero point positioning system (1003), and the pin holes and the blind pins at the bottom of the movable tray (601) can be matched with the cylindrical cone guide pin (1001), the diamond cone guide pin (1002) and the zero point positioning system (1003) at the top of the fixed tray (10) to be accurately positioned through the action of the lifting mechanism of the truss logistics system (6).

6. The method according to claim 1, wherein in step S3, the truss logistics system (6) adopts an X-direction motor to drive rollers and a Z-direction dual servo motor to drive synchronous lifting, and the jaws on the lifting mechanism can be automatically opened and closed to grasp the tray lifting appliance.

7. The method of claim 6, wherein the truss logistics system (6) detects the position in real time by means of a laser rangefinder and optimizes the transfer path in combination with a global schedule of a central control system.

8. The method for using a gantry production line for improving material handling precision according to claim 1, wherein in step S4, the five-axis linkage gantry machining center (3) adopts a double-swing-head structure and a real-time temperature compensation system, the double-swing-head structure is used for realizing X, Y, Z, A, C five-axis linkage to machine complex curved surfaces, and the temperature compensation system is used for reducing thermal deformation errors.

9. The method according to claim 1, wherein in step S5, the central control system is linked to the tool management system (2) and dynamically schedules the tools by RFID identification of tool information in combination with wear monitoring data.

10. The method according to claim 1, wherein in step S6, the central control system simultaneously schedules the parts on the idle buffer station (4) for transfer to the machining center to be machined while the cleaning process is performed.