CN113560758B - Automatic mixed-flow tailor-welding line design process for cab assembly of medium-heavy truck - Google Patents
Automatic mixed-flow tailor-welding line design process for cab assembly of medium-heavy truck Download PDFInfo
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- CN113560758B CN113560758B CN202110777016.3A CN202110777016A CN113560758B CN 113560758 B CN113560758 B CN 113560758B CN 202110777016 A CN202110777016 A CN 202110777016A CN 113560758 B CN113560758 B CN 113560758B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/006—Vehicles
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Abstract
The invention discloses an automatic mixed flow splicing welding line design process for a cab assembly of a medium and heavy truck, which is characterized in that a flexible and intelligent welding workshop with 10 ten thousand cars produced every year is designed by utilizing the minimum field area, and an automatic mixed flow splicing welding line design process scheme of 80% of machines with man-machine complementation is realized. The automatic welding equipment comprises a field process layout, a one-key switching intelligent universal welding tool, an air EMS (enhanced message service) lifting appliance automatic conveying mechanism, a main splicing and overlapping process technology and a component assembly intelligent overturning fixture transferring platform mechanism which are designed autonomously, a three-level and four-level part conveying manual lifting appliance, a welding robot and the like, wherein the cab assembly splicing adopts the robot to automatically grab components for welding, the mixed flow of each part sub-assembly and the automatic flexible production combined with man-machine interaction are adopted by an adjusting line, the assembly process production of all models is completed by using a non-switching tool technology, the field for storing and transferring products is reduced, the personnel are saved, and the investment cost is reduced by more than 50%.
Description
Technical Field
The invention relates to the technical field of industrial machinery, in particular to an automatic mixed flow splice welding line design process for a cab assembly of a medium and heavy truck.
Background
In order to expand the production capacity of a new product, solve the production bottleneck and limitation of the existing splicing welding line of the cab with the heavy truck, reduce the number of workers, improve the efficiency and meet the market demand and the follow-up development demand, the splicing welding line of the cab assemblies with different platform series is developed and designed, the automatic clamping, assembling, splicing welding, transferring and other processes of the cab assemblies and the first-level sub-assembly are realized by using a robot, and the automatic mixed flow production line for mass production of the types of the heavy truck in different platforms with different widths, lengths, heights and the like can be simultaneously met. Therefore, the design process of the automatic mixed-flow splice welding line for the cab assembly of the medium and heavy truck is particularly important.
Disclosure of Invention
Aiming at the existing production process mode, the invention aims to provide an automatic (flexible) mixed flow splice welding line design process for splicing and welding a multi-platform compatible, mixed flow production, robot control, automatic application and automatic medium and heavy truck cab assembly.
In order to achieve the aim, the invention provides an automatic mixed flow splice welding line design process for a cab assembly of a medium and heavy truck, which is characterized by comprising the following steps of: the automatic mixed-flow splicing and welding line comprises a front wall assembly splicing and welding area, a rear wall assembly splicing and welding area, a left side wall assembly splicing and welding area, a vehicle door assembly splicing and welding area, a top cover assembly splicing and welding area, a right side wall assembly splicing and welding area, a floor assembly splicing and welding area, an aerial EMS conveying area, a main welding line and a modification and adjustment line;
assembly components welded in the front wall assembly tailor-welded area, the rear wall assembly tailor-welded area, the left side wall assembly tailor-welded area, the top cover assembly tailor-welded area, the right side wall assembly tailor-welded area and the floor assembly tailor-welded area form a component assembly; the component assembly comprises a front wall assembly, a rear wall assembly, a left side wall assembly, a top cover assembly, a right side wall assembly and a floor welding assembly;
the floor overhead EMS conveys the floor assembly welded in the splicing welding area of the floor assembly to a first station of a main welding line, and the front wall assembly and the floor assembly are spliced and welded by a first station carrying robot of the main welding line;
the main welding line sequentially conveys the half assembly to a second station, a third station and a fourth station through a conveying trolley; respectively conveying the left side surrounding air EMS and the right side surrounding air EMS to a main welding wire component storage area through the left side surrounding air EMS and the right side surrounding air EMS on the left side surrounding assembly splicing welding area and the right side surrounding assembly splicing welding area placing table;
the rear enclosure air EMS conveys the rear enclosure welding assembly on the rear enclosure assembly welding area placing table to the main welding wire component storage area; the top cover welding assembly is conveyed to a feeding station through a feeding trolley; conveying the splicing welding area of the rear wall assembly, the splicing welding area of the left side wall assembly, the splicing welding area of the right side wall assembly, the splicing welding area of the top cover assembly and the floor assembly to a designated storage position of a main welding line, controlling a gripping part of a gripping tool of a robot by an identification sensor and a PLC program, and performing the splicing welding of the white body cab assembly;
the main welding line is replaced by a gripper through a robot, and related tools are automatically switched, so that automatic mixed flow tailor welding of the cab assemblies of the medium and heavy trucks on different platforms is realized;
conveying the floor welding assembly, the left side wall assembly, the right side wall assembly, the front wall assembly, the rear wall assembly and the top cover assembly to a main welding wire component storage area through an aerial EMS; the robot equipment of the main welding line identifies the component assembly, automatically switches corresponding grippers, and carries out component assembly of the cabs of different platforms to carry out piece grabbing and tailor welding;
the aerial EMS conveying area comprises left side enclosure assembly aerial EMS conveying, rear enclosure assembly aerial EMS conveying, right side enclosure assembly aerial EMS conveying and floor assembly aerial EMS conveying; assembly components in the assembly splicing welding area of the rear wall assembly, the assembly splicing welding area of the left side wall assembly, the assembly splicing welding area of the right side wall assembly and the assembly splicing welding area of the floor assembly are conveyed to a main welding wire component storage area through an aerial EMS conveying area, so that automatic mixed flow conveying of component assemblies of cabs of different platforms is realized.
Preferably, the identification switch of the aerial EMS conveying area can detect and identify the component assemblies welded in the front wall assembly splicing welding area, the rear wall assembly splicing welding area, the left side wall assembly splicing welding area, the right side wall assembly splicing welding area and the floor assembly splicing welding area, automatically call different programs to control the aerial EMS, and convey the component assemblies of the cabs of different platforms.
Further, the mixed flow tailor-welded wire design process is specifically realized through the following steps:
s1: detecting two large component assemblies in the main welding wire component storage area through an identification switch of a main welding wire, calling different PLC programs, and controlling a robot to switch different grippers to realize the tailor welding of the front wall assembly and the floor assembly at the first station of the main welding wire;
s2: the main welding line conveying trolley conveys the half assembly to a second station, a third station and a fourth station, and a robot at the fourth station of the main welding line switches different grippers to grab corresponding component assemblies of cabs of different platforms and perform automatic mixed flow tailor welding of the component assemblies of the cabs of the different platforms;
s3: and the subsequent stations of the main welding wire are welded, the last station of the main welding wire automatically conveys the cab assemblies of different platforms to a modification adjusting line through the lower-line aerial EMS of the aerial EMS conveying area, and the assembly modification adjustment of the car door assemblies spliced and welded in the car door assembly splicing area is carried out to a circulation lower-sequence workshop.
The invention has the following advantages and beneficial effects:
the invention discloses an automatic mixed flow splicing and welding line design process for a heavy truck cab assembly, and aims to solve the problems of multiple varieties, different platforms, space limitation, unstable product quality and low production efficiency, a flexible and intelligent welding workshop with 10 thousands of vehicle bodies per year is designed by using the smallest field area (7128 square meters), and particularly relates to a design process scheme for an 80% machine automatic (flexible) mixed flow splicing and welding line with different platforms (middle heavy trucks) for realizing man-machine complementation. The intelligent universal welding tool comprises a field process layout, a one-key switching intelligent universal welding tool, an air EMS lifting appliance automatic conveying mechanism, a main splicing and splicing process technology with an autonomous design, a component assembly intelligent overturning fixture transfer platform mechanism, a three-level and four-level part conveying manual lifting appliance, a welding robot and the like, wherein a cab assembly (200 types of cabs) of 6+N platforms is divided into: the floor welding assembly, the left/right side wall assembly, the front wall assembly, the rear wall assembly, the top cover assembly and the left/right vehicle door assembly are 6 blocks in total, the cab assembly (first-stage) is welded by adopting a robot to automatically grab parts, the rest second, third, fourth and fifth stage assemblies are welded manually, the automatic flexible production combining mixed flow and human-computer interaction of all the part assemblies is realized, an O-shaped automatic conveying line body is adopted as a decoration adjusting line, the design process of a tool is not required to be switched, the assembly process production of all models is completed, the storage and transfer fields of parts and tool fixtures are reduced, personnel are saved, and the investment cost is reduced by more than 50%. The method has the following specific advantages:
1. the automatic conveying and mixed flow tailor-welding of component assemblies of cab assemblies of different platforms are realized, the compatible and automatic (flexible) production of products is realized, and the production process problems of space limitation, low production efficiency and product quality consistency are solved;
2. various different component assemblies are automatically identified and fed back to a control system, and then different tools, parameters and programs are called to carry out automatic (flexible) mixed flow tailor-welding on the cab assemblies of different platforms, so that the quick and automatic switching of software and hardware such as different products, programs and tools is realized;
3. the parts of the cab assemblies compatible with various different platforms are subjected to mixed flow tailor-welding, and the design process that one production line is compatible with various automatic mixed flow tailor-welding lines of the medium-weight truck cab assemblies is realized.
Drawings
FIG. 1 is a schematic plan view of an automated (flexible) Francis splice welding line for a cab assembly of a medium and heavy truck;
FIG. 2 is a schematic plan view of the front wall assembly and the floor assembly automatically tailor-welded at the first station of the main welding line;
FIG. 3 is a schematic plan view of an automatic tailor-welding of a fourth station cab assembly of the main weld line;
FIG. 4 is a schematic illustration of an overhead EMS delivery drop-off plan view of a cab assembly of an overhead EMS delivery area;
FIG. 5 is an isometric illustration of an automatic tailor-welded plan view of a fourth station cab assembly for a main weld line;
in the figure: a front wall assembly tailor-welded zone 1; a rear wall assembly tailor-welded area 2; a left side wall assembly tailor welded zone 3; a vehicle door assembly tailor welded zone 4; a top cover assembly tailor welded zone 5; a right side wall assembly tailor welded area 6; a floor assembly tailor welded section 7; an airborne EMS delivery area 8; a main bonding wire 9; modifying the adjustment thread 10; the component assembly 11.
Detailed Description
The present invention will be described in further detail with reference to the following examples and the accompanying drawings.
As shown in the figure, the automatic mixed flow splice welding line design process for the heavy truck cab assembly aims to realize and solve the problems of diversity of splice welding types, limitation of production fields, low production efficiency, high labor intensity and single product of the traditional heavy truck cab assembly, and utilizes a robot, an automatic device and a switchable tool to realize an automatic (flexible) mixed flow splice welding line design process compatible with various heavy truck cab assemblies. In particular to a flexible, automatic and highly compatible mixed flow splice welding line design process. The process mainly comprises three plate assemblies, namely a splicing welding area of six component assemblies, a main welding line and a trimming line, wherein the splicing welding area of the component assemblies conveys various types of component assemblies to a component assembly storage area corresponding to the main welding line through an aerial EMS, the component assemblies of different types are identified and detected through a sensor and fed back to a PLC (programmable logic controller) for control, and the PLC calls different programs to control a robot gripper in the main welding line to grab the corresponding component assemblies so as to carry out automatic (flexible) mixed flow splicing welding on the cab assembly.
Example 1
In this embodiment, the process for designing the automated mixed-flow tailor-welded line for the cab assembly of the medium and heavy truck mainly comprises: the workshop is provided with a main splicing line and an adjusting line (a site for repairing the adjusting line is reserved), so that the mixed line of products on different platforms is met. The main splicing line is 14 parking spaces (in the form of main splicing stations: the robot gripper is spliced totally), and the adjusting line is more than 15 parking spaces.
Main welding wire: the floor assembly, the side wall assembly, the top cover and the like are pre-spliced together by adopting technological methods of gluing, arc welding, spot welding and the like to form a main body part of the car body on the whole, and a robot is adopted to grab and weld the main welding line.
And (3) trimming the thread: after the main welding line, all the components of the vehicle body are assembled together, the integral rigidity can not meet the requirement, and all the sub-assemblies are firmly welded together through a repair welding process.
The assembly of parts welds district:
1) Welding lines of small pieces: the door cover edge covering is finished by adopting a robot edge rolling and riveting process (can be welded in the original welding workshop area).
2) Welding lines of the side wall inner/outer plates: the station for welding the side wall inner/outer plate assembly of the car body is designed in a bilateral symmetry mode, so that the side wall inner/outer plate welding production line is arranged symmetrically, the side wall has higher requirements on the welding surface at present, parts are large and heavy, manual welding is usually adopted, and the parts are grabbed or transferred by a power assisting arm mechanism, a lifting appliance and the like.
3) Floor welding line: the floor sub-assembly is used for welding the floor and consists of a longitudinal beam assembly, a front floor, a rear floor, a middle floor and other secondary sub-assemblies.
4) Enclose two lines of assembly, the big assembly welding line of top cap after: adopt manual welding, the artifical propelling movement transmission mode of precision platform truck that adopts.
Five component assemblies 11 in a main welding wire 9 component storage area are detected through identification switches of main welding wires 9, different PLC programs are called, a robot is controlled to switch different grippers to realize the tailor welding of a front wall assembly 1 and a floor assembly 7 at a first station of the main welding wires, a main welding wire 9 conveying trolley conveys half assemblies to second, third and fourth stations, a robot at a fourth station of the main welding wires 9 switches different grippers to grip corresponding component assemblies 11 of cabs of different platforms, automatic flexible mixed flow tailor welding of the component assemblies 11 of the cabs of different platforms is carried out, the subsequent stations of the main welding wires 9 are subjected to weld addition, and the last station of the main welding wires automatically conveys the cab assemblies of different platforms to a trim line 10 through an overhead EMS of an overhead EMS conveying area 8) to carry out assembly trim workshop adjustment on a vehicle door assembly welded in a vehicle door assembly tailor welding area 4 to a next sequence so as to realize batch automatic mixed flow production line.
Claims (1)
1. The design process of the automatic mixed flow tailor-welding line of the middle heavy truck cab assembly is characterized by comprising the following steps of: the automatic mixed-flow splicing and welding line comprises a front wall assembly splicing and welding area (1), a rear wall assembly splicing and welding area (2), a left side wall assembly splicing and welding area (3), a vehicle door assembly splicing and welding area (4), a top cover assembly splicing and welding area (5), a right side wall assembly splicing and welding area (6), a floor assembly splicing and welding area (7), an aerial EMS conveying area (8), a main welding line (9) and a modification and adjustment line (10);
assembly components welded in the front wall assembly tailor-welded area (1), the rear wall assembly tailor-welded area (2), the left side wall assembly tailor-welded area (3), the top cover assembly tailor-welded area (5), the right side wall assembly tailor-welded area (6) and the floor assembly tailor-welded area (7) form a component assembly (11); the component assembly (11) comprises a front wall assembly, a rear wall assembly, a left side wall assembly, a top cover assembly, a right side wall assembly and a floor welding assembly;
the floor assembly welded in the floor assembly splicing welding area (7) is conveyed to a first station of a main welding line by the floor aerial EMS, and the front wall assembly and the floor assembly are spliced and welded by a first station carrying robot of the main welding line;
the main welding line sequentially conveys the half assembly to a second station, a third station and a fourth station through a conveying trolley; the left side surrounding EMS and the right side surrounding EMS respectively convey the left side surrounding welding assembly and the right side surrounding welding assembly on the placing table of the left side surrounding assembly splicing welding area (3) and the right side surrounding assembly splicing welding area (6) to a main welding wire component storage area;
the rear enclosure air EMS conveys the rear enclosure welding assembly on the rear enclosure assembly splicing welding area (2) placing table to a main welding wire component storage area; the top cover welding assembly is conveyed to a feeding station through a feeding trolley; conveying the assembly welded by the rear wall assembly, the left side wall assembly, the top cover assembly, the right side wall assembly, the floor assembly and the front wall assembly to a designated storage position of a main welding line, controlling a gripping part of a robot gripping apparatus by an identification sensor and a PLC program, and welding the white cab assembly;
the main welding line (9) is changed by a robot through a gripping apparatus, and related tools are automatically switched, so that automatic mixed flow tailor welding of the cab assemblies of the medium and heavy trucks on different platforms is realized;
carrying out grabbing piece welding on component assemblies (11) of cabs of different platforms;
the aerial EMS conveying area (8) comprises left side enclosure assembly aerial EMS conveying, rear enclosure assembly aerial EMS conveying, right side enclosure assembly aerial EMS conveying and floor assembly aerial EMS conveying; assembly components in a rear-side assembly splicing and welding area (2), a left-side assembly splicing and welding area (3), a right-side assembly splicing and welding area (6) and a floor assembly splicing and welding area (7) are conveyed to a main welding line (9) component storage area through an aerial EMS conveying area (8), and a top cover assembly and a front wall assembly are directly grabbed by a robot on a material rest on the side of the main welding line to be spliced and welded to the main welding line (9), so that automatic mixed flow conveying of component assemblies (11) of cabs of different platforms is realized;
the identification switch of the aerial EMS conveying area (8) can detect and identify the component assemblies (11) welded in the rear wall assembly splicing welding area (2), the left side wall assembly splicing welding area (3), the right side wall assembly splicing welding area (6) and the floor assembly splicing welding area (7), automatically call different programs to control the aerial EMS, and convey the component assemblies (11) of cabs of different platforms;
the mixed flow tailor-welded wire design process is realized by the following specific procedures:
s1: detecting two large component assemblies (11) in the main welding wire (9) component storage area through an identification switch of the main welding wire (9), calling different PLC programs, and controlling the robot to switch different grippers to realize the tailor welding of the front wall assembly and the floor assembly at the first station of the main welding wire;
s2: the main welding line (9) conveying trolley conveys the semi-assemblies to the second station, the third station and the fourth station, the robot at the fourth station of the main welding line (9) switches different grippers to grip corresponding component assemblies (11) of cabs of different platforms, and automatic mixed flow splice welding of the component assemblies (11) of cabs of different platforms is carried out;
s3: and the robot at the subsequent station of the main welding line (9) performs repair welding and additional welding, the welding size is detected on line, the cab assemblies of different platforms are automatically conveyed to a modification adjusting line (10) by the last station of the main welding line (9) through the offline overhead EMS in the overhead EMS conveying area (8), and the assembly modification adjustment of the car door assemblies spliced and welded in the car door assembly splicing and welding area (4) is performed to a transfer lower sequence workshop.
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2021
- 2021-07-09 CN CN202110777016.3A patent/CN113560758B/en active Active
Patent Citations (6)
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| KR20040099567A (en) * | 2003-05-19 | 2004-12-02 | 현대자동차주식회사 | Car body assembling apparatus equiped truck transfering device using car body welding |
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