The present invention relates to a flexible manufacturing system incorporating a fixturing assembly adapted for vehicle parts and method of manufacturing vehicle parts.
In the past, fixturing assemblies for flexible parts have been customized for each part and application, which is expensive, rigid and requires dedicated fixtures and machines to produce each product.
A known flex cell has a CNC cut nest position defined by nesting and robot points, 2 and 3 loading stations have a shared robot on an access rale, and welding operations. 2 or 3 different products can be produced at one time; otherwise, nest changeover will be required.
Another known cell has a multi-station dial such as 3 stations dial system, and each has an assigned task (more stations can be added for increased volume). Such as 3 stations where the first station loads/unloads, 2nd punches the part and the 3rd sonic welds the part. This disadvantageously requires product specific tooling and other program specific requirements (e.g., OEM requirements) such as particular castle horns, welding tip needles, end effectors, end of arm tooling, etc. The system may allow flexibility because of tool and nest changeover; however, the unused product robot needs to be swapped for other products and the welding tip or other parts may also need to be changed. The system may allow process repeatability, depending on the part position, but requires a CNC cut nest. Cycle time will increase with the number of stations required. This known system may have a shorter cycle time but take up more floor space.
Another known flex cell has a 5-station dial, clip installation, and sonic welding. It may be able to accommodate different products, but it still necessitates dedicated nesting. The system may allow flexibility because of tool and nest changeover; however, it still requires dedicated nesting. The system may allow process repeatability, but requires a CNC cut nest.
Another known cell is a single cell; start to finish, with a combination of tooling. This has disadvantageously slow cycle time, which requires more cells to increase cycle time. A first station is for load/unload of part. 2nd is a machining center (punch and weld). The system may allow flexibility because of tool and nest changeover; however, it still requires dedicated nesting. The system may allow process repeatability, but requires a CNC cut nest. The nested part is held, and a machine or robot application is incorporated but is “flying in blind” and only a sensor (e.g., part position sensor) “sees” the part and starts processing steps. A similar known cell has a 2nd machining center to punch and locate a bracket(s), with similar disadvantageous. Both of these known systems may take up less floor space, depending on volume, but have longer cycle times.
Punch and welding commonly uses CNC cut nests to support parts. With traditional machines, parts are presented on the CNC cut nest, and punch and welding features are set to process position. In traditional robotics, parts are presented on the CNC cut nest; the robot will bring the punching/welding tool to the fascia part based on predetermined points or take the entire CNC nesting with parts to a machining center based on predetermined points.
Machines/robotic set ups are relying on CNC cut nests and nest loading repeatability to achieve quality requirements. All flexible punch and welding set up gained flexibility by CNC tooling nest changeovers.
With all of the aforementioned, part position repeatability is reliant on CNC cut nests. Flexibility is only gained by tool/nest changeover. All of which requires more space for storage, time, expense in tooling and other disadvantages.
Accordingly, there exists a need for a production cell system incorporating intelligent locating and positioning at predetermined production-capable speeds combined with flexible nesting for a part (e.g., flexible fixturing, and/or tooling reduction, and/or utilize highly flexible tooling) and method for manufacturing a part using same.
In addition, as to hole creation, known mechanical punches have no tool flexibility and requires moderate nesting. Known lasers cannot round corners, do leave burn marks, and have high maintenance. Known routers do not accommodate round corners, have a slow processing time, and high nest requirement. Double sided PSA tape has a moderate nest requirement. As to bracket holding, sonic welding has moderate flexibility and processing time, and high nest requirement. Adhesive has no tool flexibility, slow processing time, moderate nest requirement, low reliability, and high maintenance.
Furthermore, conventionally, punch and welding of exterior components requires dedicated machines part design. When production is over, they are commonly replaced with new machines to support another program. In addition, when one assembly area supports multiple programs, the number of machines on the floor increases. Also, those machines need to be maintained for service supply parts after production life ends.
Accordingly, there is a desire to incorporate flexible punch and welding in the system which can support both high speed production and high cycle time service with less dedicated tooling.
The present invention is directed to a production system incorporating a fixturing assembly for vehicle parts and method of making vehicle parts. According to an aspect of the present invention, a production cell system incorporates intelligent locating and positioning and flexible nesting for at least one part and method for manufacturing parts. In accordance with aspects of the present invention there is provided a thin wall capable flexible assembly cell and fixturing that reduces the costs for assets.
According to aspects of the present invention, there is provided a flexible production assembling system incorporating at least one part fixture for a plurality of different parts, at least one position monitoring device (e.g., monitoring system, 3D vision system, 3D vision system/scanner, artificial intelligence position determination and monitoring, AI to locate part or a feature(s) of the part), and at least one programmable robot or machine (e.g., punch, weld, etc.). Preferably, the at least one part fixture is a non-dedicated fixture such that the fixture is used with various products.
Challenges/Considerations optimized according to aspects of the present invention include: Part picking system selection and artificial intelligence programing; Assembly method type and flex fixturing harmonization; Meeting the Overall Equipment Effectiveness (OEE) target; Material logistics and handling of components and finished product; New maintenance planning and training; Division skillset development and skilled resource acquisition; Optimize the capital costs and balance the line, etc.
The present invention provides common large component nesting (simple support), reduced tooling changeover, reduced tooling. One setup can support multiple vehicle programs with minimal changeover steps, in accordance with the present invention. The present invention is also compatible with and optimizes both mass production and high cycle time service part production (e.g., aftermarket service parts).
Further areas of applicability of the present invention will become apparent from the detailed description provided hereinafter. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
The present invention will become more fully understood from the detailed description and the accompanying drawings, wherein:
The following description of the preferred embodiment(s) is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.
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The base 105 is preferably operable to be conveyed, e.g., manually moved or on a conveyance system in production of vehicle parts or any predetermined advancing system, in accordance with aspects of the present invention. The base 105 is operably shaped to be advanced in a substantially automated process. Alternatively, casters, e.g., urethane casters, are operably connected to the base 105 or a cart portion to move the support holding the part in production, when/if needed.
It is understood that the flexible part fixture 100 is operably adaptable for any at least one predetermined part, e.g., automotive vehicle parts. Preferably, the fixture 100 is adaptable for incorporating in the manufacturing of a plurality of parts. By way of non-limiting example, useable in the production of predetermined panels and the same fixture is useable in the production of predetermined fascia, or any other predetermined part(s).
It is understood that the fixture 100, including the support bars 102, etc., are operably adaptable depending on the particular applications as suitable and necessary nesting support where needed depending on the shape of the parts without departure from the scope of the present invention.
With known systems, a nested part is held, and a machine or robot application moves in “blind”. Only a small sensor is used, at times, such as a part sensor that “sees” the part and then the process is started.
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According to aspects of the present invention, by utilizing part position sensing technologies (such as vision system(s), lidar(s), laser(s), scanner(s), 3D vision, 3D scanner(s), etc., and any combinations thereof) in combination with artificial intelligence, achieving punch, weld, and quality requirements with non-CNC cut nests is made possible. The non-CNC cut nests accepts a plurality of different shapes of products and processes punch and weld (or other predetermined processes) on the same setup or with minimum changeover.
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The flexible assembling system 106 includes at least one flexible part fixture 100 (“fixture”) that holds at least one part 104 (e.g., a 2-bar support bar fixture of
The flexible assembling system 106 includes at least one first part position sensing device 110 (e.g., first vision system) incorporating artificial intelligence (AI), operable to give the overall view or “big picture” of the at least one part 104 on each fixture 100 (e.g., an overall fascia position monitor vision system).
The flexible assembling system 106 includes at least one robot 112. At least one second part position sensing device 114 (e.g., second vision system) is also provided incorporating AI, preferably as an AI vision system on the at least one robot 112 (e.g,, on a grab hand) and/or adjacent thereto (e.g., final positioning vision system on at least one predetermined location on or adjacent to the robot). The at least one robot 112 is preferably rotatable between at least two stations (e.g., load/unload and punch and/or weld). At least one programable controller 117 is provided for controlling the motion and operations of the at least one robot 112.
The at least one robot 112 preferably is one or more part-holding robots with a flex hand indicated generally at 116 (e.g., fascia holding robot with a flex hand). The at least one vision system 114 is preferably operably coupled toward the flex hand 116.
Alternatively, or additionally, the at least one robot 112 includes one or more robots with a clamp system indicated generally at 122, e.g., bean bag clamps with vacuum where parts 104 are grabbed, and vacuum applied inside for additional holding in a reasonable predetermined location.
The flexible assembling system 106 includes at least one processing station indicated generally at 118 (“station”). Preferably, the station 118 is a punch and weld tool station. Preferably, the station 118 includes at least one punch and die device shown generally at 120, more preferably, a C-frame punch and die device 120. Preferably, also included at the station 118 is at least one sonic weld device shown generally at 124, preferably, including at least one sonic weld horn 126 and at least one bracket holding jig indicated generally at 128. In accordance with preferred aspects of the present invention, at least one bracket is welded to the part 104. It is understood that any predetermined alternative welding, parts welded to the part 104, or any alternative processing is contemplated depending on the application without departure from the scope of the present invention. Processing includes, but is not limited to, e.g., punching, bracketing, aperture creation, part insertion, clip install, sensor install, various park sensor installs, park sensor hole punch, welding or otherwise processing the part.
Predetermined single or combination of function stations are contemplated depending on the application. It is understood that while punch and weld tools are described, it is contemplated that additional or alternative devices are used depending on the particular applications without departure from the scope of the present invention. While a sonic weld is described, it is understood that alternative welding, e.g., Infrared, vibration, etc., compatible devices are contemplated depending on the particular applications without departure from the scope of the present invention.
Preferably, the part position sensing devices 110,114 are artificial intelligence vision systems to locate the part 104 or at least one predetermined feature of the part (e.g., for robot 112 pick-up, predetermined processing, etc.). By way of non-limiting example, to locate a cutout feature on the part (e.g., for an exhaust hole) as the validating fixturing position. By way of another non-limiting example, locating scribe lines. By way of another non-limiting example, locating using scribe lines, scribe line height, or predetermined features unique in the part to scan position to locate the work area (e.g., such as at least one bracket or at least one bracket attachment area), or to scan the entire product and the AI will know where the at least one bracket goes.
At least one production cell 107 is provided. Preferably, at least a dual cell in parallel for higher volume is employed depending on the application without departure from the scope of the present invention. It is understood that the flexible assembling system 106 is adaptable depending on the application for increased part volumes with a plurality of robots 112 and stations 118.
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A plurality of first cells 130 are provided for performing a predetermined process, preferably, punching. At least one robot 112 in each cell (as further described above and shown in
A plurality of second cells 134 are provided for performing a predetermined process, preferably, welding, most preferably, sonic welding. At least one robot 112 in each cell (as further described above and shown in
By utilizing robots 112 at each cell combined with part position sensing systems 110,114 (such as vision system(s), lidar(s), laser(s), scanner(s), 3D vision, 3D scanner(s), etc., and any combinations thereof) that incorporate artificial intelligence, achieving punch, weld, and quality requirements with non-CNC cut nests (e.g., flexible part fixtures 100) is made possible. The non-CNC cut nests accepts a plurality of different shapes of products and processes punch and weld (or other predetermined processes) on the same production volume setup or with minimum changeover.
A plurality of flexible part fixtures (or “nests”) 100 (e.g., multiple carts with nests) are traveling through automated stations, in accordance with aspects of the present invention. The number and types of stations will vary by the required process and production demand.
While a fascia is described, it is understood that the system 106 is adaptable for any predetermined parts, most preferably, but not exclusively, large parts for vehicles. It is further understood that the orientation of the parts depicted in the drawings is not intended to be limiting. Any predetermined orientation(s) is/are contemplated depending on the application without departure from the scope of the present invention.
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In accordance with aspects of the present invention, the system is operable to achieve production capable speeds (e.g., advancing parts to process-dictated stations), provides flexible fixturing and tooling reduction (e.g., utilizing a highly flexible tooling with various different shaped parts), allows process position repeatability and necessary flexible nesting support as needed (e.g., part position locating processed by a robot). There is achievable program-specific tooling reduction; rather, the present invention provides a common nest (e.g., such as a reindeer fixture, 2-bar support, etc.), in accordance with aspects of the present invention. Preferably, a 3D vision system/scanner on the robot to process a current part location. Preferably, a flexible holding robotic hand for a plurality of different shaped parts is utilized. For punch and weld processing, by way of non-limiting example, program-specific punch tooling is used, and localized support pads are operably connected to the robot, in accordance with aspects of the present invention. For welding, generic sonic horns on the weld tooling and support pads on the robot are used, in accordance with aspects with the present invention. According to an aspect of the present invention, a robot clamp system is operable to locate at least one bracket to the predetermined correct location(s) on the part (e.g., a self-centering clamp).
The description of the invention is merely exemplary in nature and, thus, variations that do not depart from the gist of the invention are intended to be within the scope of the invention. Such variations are not to be regarded as a departure from the spirit and scope of the invention.
This application is a POT International Patent Application claiming priority to U.S. Provisional Application No. 62/970,008, filed Feb. 4, 2020. The disclosure of the above application is incorporated herein by reference.
Filing Document | Filing Date | Country | Kind |
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PCT/US2021/016608 | 2/4/2021 | WO |
Number | Date | Country | |
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62970008 | Feb 2020 | US |