CN110640478B - Rear floor production method - Google Patents
Rear floor production method Download PDFInfo
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- CN110640478B CN110640478B CN201910759682.7A CN201910759682A CN110640478B CN 110640478 B CN110640478 B CN 110640478B CN 201910759682 A CN201910759682 A CN 201910759682A CN 110640478 B CN110640478 B CN 110640478B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P23/00—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass
- B23P23/06—Metal-working plant comprising a number of associated machines or apparatus
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q7/00—Arrangements for handling work specially combined with or arranged in, or specially adapted for use in connection with, machine tools, e.g. for conveying, loading, positioning, discharging, sorting
- B23Q7/04—Arrangements for handling work specially combined with or arranged in, or specially adapted for use in connection with, machine tools, e.g. for conveying, loading, positioning, discharging, sorting by means of grippers
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Abstract
The invention provides a production method of a rear floor, which comprises the following steps: determining the lap joint relation of the plate elements in the rear floor; determining respective material properties of the panels in the rear floor; determining the takt time required by the processing of the rear floor; selecting a connection process according to the overlapping relation and the material property, and performing a connection experiment of the plates in the rear floor; when the connection experiment result shows that the connection requirement is met, determining a connection process of the plate in the rear floor; dividing processing stations; performing a robot accessibility test; when the accessibility test of the robot meets the requirement and the processing time is within the takt time, determining that the divided stations are reasonable; and arranging a production site, and producing the rear floor. The invention can realize the automatic processing of the rear floor, reasonably matches riveting and drilling screw processes to connect and assemble the rear floor, improves the production efficiency of the rear floor, reduces the production cost and promotes the automatic application of new materials and different processes in the automobile industry.
Description
Technical Field
The invention belongs to the technical field of automobile manufacturing, and particularly relates to a rear floor production method.
Background
The prior vehicles are mainly of steel structures, and aluminum alloy materials are used for some vehicles. Vehicle frames, including floors, doors, roofs, body side panels, and fenders, are typically made of steel. Because these components are most important to driver safety, it is difficult to replace them with other materials. Materials used for other less important parts such as automotive hoods, sunroofs, bumpers or engine mounts are often replaced by lighter, higher strength, lower cost materials. Such as light steel, high-strength low alloy, aluminum material, carbon fiber material, etc.
The combination of various materials is also evolving, and in order to adapt to new materials, there have been emerging such as bonding, seamless welding, rolling blanks and laser welding blanks, rivet joining, self-piercing riveting, bolts, laser spot welding, flow drilling screws. The amount of simple spot welding has been reduced.
Self-piercing riveting is a cold joining technique used to join two or more metal sheets. After the special rivet penetrates through the top layer of the plate, the hollow structure at the tail part of the rivet is expanded and penetrated without penetrating through the bottom layer of the plate under the action of the riveting die, so that a firm riveting point is formed. The self-piercing riveting is improved by 30% compared with the common welding spot; the plate material can be connected with a plurality of plate materials which are difficult to spot weld and can be connected with a plurality of layers of plate materials at one time; the coating plate or the plating layer plate can be riveted on the premise of not damaging the plating layer; the riveting process has short period, and can be as short as 1 second. However, self-piercing riveting also has limitations, such as larger weight of the riveter and larger size of the riveter, which results in limited applicable space of the riveter. Insufficient strength when used for single point static connections. The size of the nail head determines that a larger flange width is necessary. The connection direction must be considered. In an automated production line, a rivet delivery mechanism needs to be added.
The flow drilling screw tightening process is a cold forming process which conducts high-speed rotation of a motor to a plate to be connected through a central tightening shaft of equipment, generates heat due to friction and generates plastic deformation, and then self-tapping and screw connection are carried out. This process is a single-sided joining technique, also known as hot melt self-tapping. The flow drilling screw tightening process softens a plate to be connected through high-speed rotation of a screw, extrudes and screws the plate to be connected under the action of huge axial pressure, finally forms threaded connection between the plate and the screw, and a base material at a central hole is extruded out to form an annular sleeve at the bottom of a lower layer plate. The flow drill screw tightening process comprises six stages: rotation (heating), penetration, through-hole, tapping, threading, fastening. However, the flow drill screw tightening process has limitations, for example, only the air blowing type is mature in the screw feeding mode, the robot has single action and is difficult to switch, the risk of clamping nails exists, and the beat time is relatively long.
The connection processes have respective advantages and disadvantages, different connection schemes may have great differences in safety, economy and the like, and more than two connection processes are often required to be adopted at the same time, which leads to how to reasonably match different processes and design connection schemes in the connection design of the plates, particularly between different materials, so that the maximum safety purpose and economic value are realized, and the problems are most frequently encountered in the field.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is that different connection processes are difficult to match and use when plates are connected, so that a rear floor production method and a rear floor production line are provided.
In order to solve the above problems, the present invention provides a rear floor production method, comprising:
determining the lapping relation and the assembling process of the plates in the rear floor;
determining respective material properties of the panels in the rear floor;
determining the takt time required by the processing of the rear floor;
selecting a connection process according to the overlapping relation and the material property, and performing a connection experiment of the plates in the rear floor;
the connection experiment comprises a self-piercing riveting connection experiment and/or a flow drilling screw connection experiment;
wherein, the self-piercing riveting connection experiment step comprises: firstly, primarily selecting rivets and riveting dies, wherein the length of the rivets and the types of the riveting dies are preselected according to the sheet thickness size and the layer number of the sheet; performing self-piercing riveting connection on at least two plates; slicing the riveting part, polishing the cross section, and carrying out size measurement and stress test through a metallographic microscope; judging whether the connecting structure of at least two plates is qualified or not; the step of judging whether the connecting structure of at least two plate members is qualified comprises the following steps: judging whether the overlap tensile stress value and/or the minimum thickness and/or the interlocking value and/or the maximum pressure of the riveting part and/or the head height of the rivet reach a target value;
wherein, the flow drill screw connection experiment includes: firstly, primarily selecting the type of a screw and a screwing parameter according to the lap joint relation of the plates; secondly, performing flow drilling screw connection on at least two plates; thirdly, slicing the screw part, polishing the cross section, and carrying out size measurement and torque test through a metallographic microscope; judging whether the connecting structure of at least two plates is qualified or not; the step of judging whether the connecting structure of at least two plates is qualified or not comprises the following steps: judging whether the appearance quality and/or the torsion value and/or the lap tensile stress value of the screw reach a target value;
when the connection experiment result shows that the connection requirement is met, determining a connection process of the plate in the rear floor;
dividing rear floor processing stations according to the lap joint relation of the plates and the connection process among the plates;
carrying out a robot accessibility test according to the divided stations;
when the accessibility test of the robot meets the requirement and the processing time of the rear floor is within the takt time, determining that the divided stations are reasonable;
and arranging a production site, and producing the rear floor.
Preferably, the step of dividing the rear floor processing station according to the connecting process of the panel includes:
and determining the processing batch and the processing sequence of the connecting points between the plate elements in the rear floor.
A rear floor production line adopts the rear floor production method.
Preferably, the method comprises the following steps:
the first upper part gluing station, the second riveting station, the third upper part gluing station, the fourth upper part gluing riveting station, the fifth riveting station, the sixth upper part gluing riveting station, the seventh drilling screw station, the eighth drilling screw station, the ninth fixed spot welding station and the tenth spot inspection lower station are sequentially arranged.
Preferably, the first workpiece feeding gluing station is provided with a first manual workpiece feeding table, a first gripper placing table, a first fixed gluing table and a first transfer robot, an operator places a workpiece on the first manual workpiece feeding table, the first gripper placing table is provided with a first workpiece gripper, the first transfer robot is connected with the first workpiece gripper on the first gripper placing table, the first transfer robot grips the workpiece on the first manual workpiece feeding table, and the first transfer robot grips the workpiece to the fixed gluing table for gluing to form the first workpiece.
Preferably, the second riveting station is provided with a second riveting point positioning fixture, a second riveting robot A, a second riveting robot B, a second carrying robot and a second gripper placing frame, a first workpiece output by the first workpiece feeding gluing station is placed on the second riveting point positioning fixture, a second workpiece gripper is placed on the second gripper placing frame, the first workpiece is riveted by the second riveting robot A and the second riveting robot B to form a second workpiece, the second carrying robot is connected with a second workpiece gripper on the second gripper placing frame, and the second carrying robot grabs the second workpiece by the second workpiece gripper and turns the second workpiece gripper into the next station.
Preferably, the third workpiece loading and gluing station is provided with a third workpiece loading assembly table, a third gripper placing frame, a third fixed gluing table and a third transfer robot, a third workpiece gripper is placed on the third gripper placing frame, the third transfer robot is connected with the third workpiece gripper on the third gripper placing frame, an operator places the third assembled workpiece on the third workpiece loading assembly table, the third transfer robot grips the third assembled workpiece through the third workpiece gripper, the third transfer robot grips the third assembled workpiece to the third fixed gluing table for gluing, the second workpiece output by the second riveting station is placed on the third workpiece loading assembly table, the third transfer robot assembles the third assembled workpiece and the second workpiece to form a third workpiece, and the third transfer robot grips the third workpiece to transfer to the next station.
Preferably, the fourth workpiece feeding gluing and riveting station is provided with a fourth workpiece feeding workbench, a fourth riveting point positioning fixture, a fourth riveting robot A, a fourth riveting robot B, a fourth riveting robot C, a fourth carrying robot and a fourth gripper placing frame, an operator places a fourth assembly workpiece on the fourth workpiece feeding workbench, a fourth workpiece gripper is placed on the fourth gripper placing frame, the fourth carrying robot is connected with the fourth workpiece gripper on the fourth gripper placing frame, a third workpiece output by the third workpiece feeding station is placed on the fourth riveting point positioning fixture, the fourth carrying robot grips the fourth assembly workpiece through the fourth workpiece gripper and transfers the fourth assembly workpiece to the fourth riveting point positioning fixture to be assembled with the fourth assembly workpiece to form the fourth workpiece, and the fourth riveting robot A, the fourth riveting robot B and the fourth riveting robot C rivet the fourth workpiece.
Preferably, the fifth riveting station is provided with a fifth transfer robot, a fifth gripper placing frame and a fifth fixed riveting device, a fifth workpiece gripper is placed on the fifth gripper placing frame, the fifth transfer robot is connected with the fifth workpiece gripper on the fifth gripper placing frame, the fifth transfer robot grips a fourth workpiece output by the fourth upper workpiece gluing riveting station through the fifth workpiece gripper, and the fifth transfer robot grips the fourth workpiece to the fifth fixed riveting device for riveting to form a fifth workpiece.
Preferably, the sixth workpiece feeding gluing and riveting station is provided with a sixth workpiece feeding worktable, a sixth riveting point positioning fixture, a sixth riveting robot A, a sixth riveting robot B, a sixth riveting robot C, a sixth transfer robot, a sixth gripper placing rack and a sixth fixed gluing platform, an operator places a sixth assembly workpiece on the sixth workpiece feeding worktable, a sixth workpiece gripper is placed on the sixth gripper placing rack, the sixth transfer robot is connected with the sixth workpiece gripper on the sixth gripper placing rack, a fifth workpiece output by the fifth riveting station is placed on the sixth riveting point positioning fixture, the sixth transfer robot grips the sixth assembly workpiece through the sixth workpiece gripper, the sixth transfer robot grips the sixth assembly workpiece to the sixth fixed gluing platform for gluing and transfers the sixth assembly workpiece to the sixth riveting point positioning fixture, and the sixth assembly workpiece is assembled with the third workpiece to form the sixth workpiece, the sixth riveting robot A, the sixth riveting robot B, the sixth assembly workpiece, the sixth assembly robot, the sixth assembly workpiece, the sixth, And the sixth riveting robot B and the sixth riveting robot C rivet a sixth workpiece.
Preferably, the seventh flow drilling and screw station is provided with a seventh transfer robot A, a seventh transfer robot B, a seventh flow drilling and screw robot, a seventh flow drilling and screw fixing clamp and a seventh workpiece reverse table, the seventh transfer robot A grabs the sixth workpiece output by the sixth upper gluing and riveting station and places the sixth workpiece on the seventh flow drilling and screw fixing clamp, the seventh flow drilling and screw robot performs flow drilling and screw machining on the sixth workpiece to form a seventh workpiece, the seventh transfer robot B grabs the seventh workpiece and places the seventh workpiece on the seventh workpiece reverse table, and the seventh workpiece reverse table turns over the seventh workpiece.
Preferably, the eighth flow drilling screw station is provided with an eighth transfer robot, an eighth gripper placing frame, an eighth flow drilling screw robot and an eighth flow drilling point setting fixture, an eighth workpiece gripper is placed on the eighth gripper placing frame, the eighth transfer robot is connected with the eighth workpiece gripper on the eighth gripper placing frame, the eighth transfer robot grips the seventh workpiece output by the seventh flow drilling screw station through the eighth workpiece gripper, the seventh workpiece is placed on the eighth flow drilling point setting fixture, and the eighth flow drilling screw robot performs flow drilling screw machining on the seventh workpiece to form the eighth workpiece.
Preferably, the ninth fixed spot welding station is provided with a ninth transfer robot, a ninth gripper placing frame, a ninth fixed welding gun and a ninth workpiece reversing table, the ninth workpiece gripper is placed on the ninth gripper placing frame, the ninth transfer robot is connected with the ninth workpiece gripper on the ninth gripper placing frame, the ninth transfer robot grips the eighth workpiece output by the eighth drilling screw station through the ninth workpiece gripper, the ninth transfer robot grips the eighth workpiece to the ninth fixed welding gun for spot welding to form the ninth workpiece, after the spot welding is completed, the ninth workpiece is placed on the ninth workpiece reversing table, and the ninth workpiece reversing table turns over the ninth workpiece.
Preferably, the tenth spot welding station is provided with a tenth transfer robot, a tenth gripper placing frame, a tenth spot welding table and a tenth workpiece unloading table, the tenth workpiece gripper is placed on the tenth gripper placing frame, the tenth transfer robot is connected with the tenth workpiece gripper on the tenth gripper placing frame, the tenth transfer robot grips the ninth workpiece output by the ninth fixed spot welding station through the tenth workpiece gripper, and the tenth transfer robot transfers the ninth workpiece to the tenth spot welding table or the tenth workpiece unloading table.
The production method of the rear floor and the production line of the rear floor provided by the invention at least have the following beneficial effects:
the invention is suitable for manufacturing the rear floor by adopting more than two connecting processes simultaneously, can reasonably match different processes and design a connecting scheme, thereby realizing the maximum safety purpose and economic value, realizing the automatic processing of the rear floor, reasonably matching riveting and drilling screw processes to carry out the connecting assembly of the rear floor, improving the production efficiency of the rear floor, reducing the production cost and promoting the automatic application of new materials and different processes in the automobile industry.
Drawings
FIG. 1 is a schematic layout of a post-floor production line according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a first upper gluing station according to an embodiment of the invention;
FIG. 3 is a schematic diagram of a second riveting station according to an embodiment of the invention;
FIG. 4 is a schematic structural diagram of a third upper gluing station according to an embodiment of the invention;
FIG. 5 is a schematic structural diagram of a fourth gluing and riveting station for upper parts according to an embodiment of the invention;
FIG. 6 is a schematic structural diagram of a fifth riveting station according to an embodiment of the invention;
FIG. 7 is a schematic structural diagram of a sixth gluing and riveting station for upper parts according to an embodiment of the invention;
FIG. 8 is a schematic diagram of a seventh flow drill screw station according to an embodiment of the present invention;
FIG. 9 is a schematic structural diagram of an eighth flow drill screw station according to an embodiment of the present invention;
FIG. 10 is a schematic structural view of a ninth fixed spot welding station in accordance with an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a tenth spot check unloading station according to an embodiment of the present invention.
The reference numerals are represented as:
1. a first upper part gluing station; 2. a second riveting station; 3. a third upper gluing station; 4. a fourth upper piece gluing and riveting station; 5. a fifth riveting station; 6. a sixth upper part gluing and riveting station; 7. a seventh flow drill screw station; 8. an eighth flow drill screw station; 9. a ninth fixed spot welding station; 10. a tenth spot check workpiece discharging station; 11. a first manual workpiece feeding table; 12. a first gripper placement table; 13. a first fixed glue spreading table; 14. a first transfer robot; 15. a second riveting point positioning clamp; 16. a second riveting robot A; 17. a second riveting robot B; 18. a second transfer robot; 19. a second gripper placing frame; 20. a third upper assembly table; 21. a third gripper placing frame; 22. thirdly, fixing a gluing table; 23. a third transfer robot; 23a, a third robot walking system; 24. a fourth workpiece feeding table; 25. a fourth riveting point positioning clamp; 26. a fourth riveting robot A; 27. a fourth riveting robot B; 28. a fourth riveting robot C; 29. a fourth transfer robot; 30. a fourth gripper placing frame; 31. a fifth transfer robot; 31a, a fifth robot traveling system; 32. a fifth gripper placing frame; 33. a fifth fixing rivet adding device; 34. a sixth workpiece feeding worktable; 35. a sixth riveting point positioning clamp; 36. a sixth riveting robot A; 37. a sixth riveting robot B; 38. a sixth riveting robot C; 39. a sixth transfer robot; 39a, a sixth robot traveling system; 40. a sixth gripper placing frame; 42. a seventh transfer robot a; 42a, a seventh robot traveling system; 43. a seventh transfer robot b; 44. a seventh drill screw robot; 45. a seventh flow drilling point fixing clamp; 46. a seventh work inverting table; 47. an eighth transfer robot; 47a, an eighth robot traveling system; 48. an eighth gripper placing frame; 49. an eighth drill-screw robot; 50. an eighth flow drilling point fixing clamp; 51. a ninth transfer robot; 52. a ninth gripper placing frame; 53. a ninth fixed welding gun; 54. a ninth work reverse table; 55. a tenth transfer robot; 56. a tenth gripper placing frame; 57. a tenth spot check station; 58. the tenth workpiece placing table.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention discloses a plate connecting method, which is used for the lap joint type fixed connection between at least two plates and comprises the following steps:
step one, determining the lap joint relation and the assembling process of at least two plate pieces. In this embodiment, the step of determining the overlapping relationship of the panel members includes: determining the respective thicknesses of at least two plate members; determining the number of layers of materials at the lap joint; the number and location of the connection points are determined.
Determining the material properties of at least two plates; in this embodiment, the material properties include
Step three, determining the takt time required by the connection processing of at least two plate pieces;
and step four, selecting a connection process according to the overlapping relation and the material property, and performing a connection experiment on at least two plates, wherein the connection process in the embodiment comprises a self-piercing riveting process and/or a flow drilling screw process.
The connection process is selected according to the overlapping relationship and the material property, and the selection of two connection processes of rivet riveting and flow drilling screw is taken as an example.
The connecting process of selecting rivet riveting includes but is not limited to the following cases:
1. when the thickness of the upper layer plate is larger than that of the lower layer plate, the upper layer plate is connected with the lower layer plate through rivets;
2. when the positions of the connecting process points among the plates need to be glued, the plates are connected by rivets;
3. when the hardness of the upper layer plate is higher than that of the lower layer plate, the upper layer plate is connected with the lower layer plate through rivets;
4. the upper surface and the lower surface of the plate have appearance quality requirements and are connected by rivets.
The connection process of the flow drilling screw is selected, including but not limited to the following cases:
1. the upper plate part is provided with a plate with a pre-opened hole, and a screw process is selected;
2. if only one side of the upper surface plate element can be ensured to be inserted, the screw process is selected.
And step five, when the connection experiment result shows that the connection requirement is met, and the connection process of at least two plates is determined to meet the process requirement in the takt time. The connection experiment comprises a self-piercing riveting connection experiment and/or a flow drilling screw connection experiment.
The plate connecting method provided by the embodiment of the invention is suitable for machining and connecting at least two plates, particularly steel and aluminum structural plates in automobile sheet metal parts, and adopts the machining and connecting of a robot automatic production line, the connecting process comprises but is not limited to a self-piercing riveting process and/or a flow drilling screw process, the two processes have respective advantages and disadvantages, and only through reasonable distribution and different connecting processes adopted by different connecting points, the efficiency is improved and the production cost is reduced on the basis of ensuring the sufficient strength of the plates. The plate connecting method of the embodiment of the invention solves the problem of how to reasonably configure different plates when connecting, and selects different connecting processes, thereby achieving a better connecting scheme.
In this embodiment, the self-piercing riveting connection experiment step includes:
firstly, primarily selecting rivets and riveting dies, wherein the length of the rivets and the types of the riveting dies are preselected according to the sheet thickness size and the layer number of the sheet;
performing self-piercing riveting connection on at least two plates;
slicing the riveting part, polishing the cross section, and carrying out size measurement and stress test through a metallographic microscope;
judging whether the connecting structure of at least two plates is qualified or not. The step of judging whether the connecting structure of at least two plates is qualified or not comprises the following steps: and judging whether the overlap tensile stress value and/or the minimum thickness and/or the interlocking value and/or the maximum pressure of the riveting part and/or the head height of the rivet reach a target value or not. The riveting combination is guaranteed to be few as much as possible, so that the robot riveting gun is strong in sharing, compact in layout, efficient in beat and low in cost.
The interlocking value refers to the horizontal distance between a riveted section and a rivet foot of the rivet and the lowest layer plate observed through a metallographic microscope after riveting is completed. The maximum pressure refers to the maximum pressure at which the riveter presses the rivet into the workpiece.
The head height of the rivet means the distance between the horizontal upper surface of the riveting cap and the horizontal plane of the rivet passing through the first layer of plate by observing the riveted section through a metallographic microscope after the riveting is finished.
In this embodiment, the self-piercing riveting connection experiment is performed for at least five groups, and the results of the five groups of experiments are all qualified, so that the connection structure of at least two plates can be determined to be qualified. If the nail mold combination is not qualified, the nail mold combination needs to be replaced again for re-experiment.
In this embodiment, the flow drill screw connection experiment includes:
firstly, primarily selecting the type of a screw and a screwing parameter according to the lap joint relation of the plates;
secondly, performing flow drilling screw connection on at least two plates;
thirdly, slicing the screw part, polishing the cross section, and carrying out size measurement and torque test through a metallographic microscope;
judging whether the connecting structure of at least two plates is qualified or not. The step of judging whether the connecting structure of at least two plates is qualified or not comprises the following steps: and judging whether the appearance quality and/or the torsion value and/or the lap tensile stress value of the screw reach the target value.
The self-piercing riveting connection experiment is carried out for at least five groups, the five groups of experiment results are all qualified, and the connection structure of at least two plates can be determined to be qualified.
The embodiment of the invention provides a rear floor production method, which comprises the following steps:
step one, determining the lap joint relation of the plate elements in the rear floor.
And step two, determining the respective material properties of the plates in the rear floor.
And step three, determining the takt time required by the processing of the rear floor.
And step four, selecting a connection process according to the overlapping relation and the material property, and performing a connection experiment on the plate in the rear floor.
And step five, when the connection experiment result shows that the connection requirement is met, determining the connection process of the plate in the rear floor.
And step six, dividing the machining stations of the rear floor according to the lap joint relation of the plates and the connection process between the plates, and determining the machining batch and the processing sequence of the connection points between the plates in the rear floor.
Seventhly, performing a robot accessibility test according to the divided stations; and the accessibility test of the robot is to use the robot to perform connection test on the connection points according to the station division result in the step six, if the connection test can be completed, the station division in the step six is reasonable, and if the connection test cannot be met, the connection process needs to be selected again in the step five and the step six, and the stations need to be divided again.
And step eight, arranging a production site, and producing the rear floor.
Referring to fig. 1 to 10, a rear floor production line adopts the rear floor production method.
In this embodiment, the back floor production line includes: the device comprises a first upper part gluing station 1, a second riveting station 2, a third upper part gluing station 3, a fourth upper part gluing riveting station 4, a fifth additional riveting station 5, a sixth upper part gluing riveting station 6, a seventh flow drill screw station 7, an eighth flow drill screw station 8, a ninth fixed spot welding station 9 and a tenth spot inspection lower part station 10 which are sequentially arranged.
The first workpiece feeding gluing station 1 is provided with a first manual workpiece feeding table 11, a first gripper placing table 12, a first fixed gluing table 13 and a first transfer robot 14, an operator places a workpiece on the first manual workpiece feeding table 11, the first gripper placing table 12 places a first workpiece gripper, the first transfer robot 14 places the first gripper placing table 12 and is connected with the first workpiece gripper, the first transfer robot 14 grips the workpiece on the first manual workpiece feeding table 11, and the first transfer robot 14 grips the workpiece to the first fixed gluing table 13 for gluing to form the first workpiece.
The second riveting station 2 is provided with a second riveting point positioning clamp 15, a second riveting robot A16, a second riveting robot B17, a second carrying robot 18 and a second gripper placing frame 19, a first workpiece output by the first workpiece feeding gluing station 1 is placed on the second riveting point positioning clamp 15, a second workpiece gripper is placed on the second gripper placing frame 19, the first workpiece is riveted by the second riveting robot A16 and the second riveting robot B17 to form a second workpiece, the second carrying robot 18 is connected with the second workpiece gripper on the second gripper placing frame 19, and the second carrying robot 18 grabs the second workpiece through the second workpiece gripper and rotates the second workpiece into the next station.
The third workpiece feeding and gluing station 3 is provided with a third workpiece feeding assembly table 20, a third gripper placing frame 21, a third fixed gluing table 22 and a third transfer robot 23, a third workpiece gripper is placed on the third gripper placing frame 21, the third transfer robot 23 is connected with a third workpiece gripper on the third gripper placing frame 21, an operator places a third assembled workpiece on the third workpiece feeding assembly table 20, the third transfer robot 23 grips the third assembled workpiece through the third workpiece gripper, the third transfer robot 23 grips the third assembled workpiece to the third fixed gluing table 22 for gluing, a second workpiece output from the second riveting station 2 is placed on the third workpiece feeding assembly table 20, the third transfer robot 23 assembles the third assembled workpiece with the second workpiece to form a third workpiece, and the third transfer robot 23 grips the third workpiece and transfers the third workpiece to the next station.
The third transfer robot 23 is provided with a third robot traveling system 23a, and the third transfer robot 23 is movable along the third robot traveling system 23 a.
The fourth upper workpiece gluing and riveting station 4 is provided with a fourth upper workpiece workbench 24, a fourth riveting point positioning fixture 25, a fourth riveting robot A26, a fourth riveting robot B27, a fourth riveting robot C28, a fourth transfer robot 29 and a fourth gripper placing frame 30, an operator places a fourth assembly workpiece on the fourth upper workpiece workbench 24, a fourth workpiece gripper is placed on the fourth gripper placing frame 30, the fourth transfer robot 29 is connected with a fourth workpiece gripper on the fourth gripper placing frame 30, a third workpiece output by the third upper workpiece gluing station 3 is placed on the fourth riveting point positioning fixture 25, the fourth transfer robot 29 grips the fourth assembly workpiece through the fourth workpiece gripper and transfers the fourth assembly workpiece to the fourth riveting point positioning fixture 25, and the fourth workpiece is assembled with the third workpiece to form a fourth workpiece, and the fourth riveting robot A26, the fourth riveting robot B27 and the fourth riveting robot C28 rivet the fourth workpiece.
The fifth rivet increasing station 5 is provided with a fifth carrying robot 31, a fifth gripper placing frame 32 and a fifth fixed rivet increasing device 33, a fifth workpiece gripper is placed on the fifth gripper placing frame 32, the fifth carrying robot 31 is connected with the fifth workpiece gripper on the fifth gripper placing frame 32, the fifth carrying robot 31 grips a fourth workpiece output by the fourth upper workpiece gluing and riveting station 4 through the fifth workpiece gripper, and the fifth carrying robot 31 grips the fourth workpiece to the fifth fixed rivet increasing device 33 for rivet increasing to form a fifth workpiece.
The fifth transfer robot 31 is provided with a fifth robot traveling system 31a, and the fifth transfer robot 31 is movable along the fifth robot traveling system 31 a.
The sixth workpiece gluing and riveting station 6 is provided with a sixth workpiece feeding worktable 34, a sixth riveting point positioning fixture 35, a sixth riveting robot A36, a sixth riveting robot B37, a sixth riveting robot C38, a sixth transfer robot 39, a sixth gripper placing rack 40 and a sixth fixed gluing station, wherein an operator places a sixth assembly workpiece on the sixth workpiece feeding worktable 34, places a sixth workpiece gripper on the sixth gripper placing rack 40, the sixth transfer robot 39 connects the sixth workpiece gripper on the sixth gripper placing rack 40, places a fifth workpiece output by the fifth riveting station 5 on the sixth riveting point positioning fixture 35, the sixth transfer robot 39 grips the sixth assembly workpiece through the sixth workpiece gripper, the sixth transfer robot 39 lifts the sixth assembly workpiece to the sixth fixed gluing station for gluing, transfers the sixth assembly workpiece to the sixth riveting point positioning fixture 35 and assembles the sixth assembly workpiece with the third workpiece, the sixth workpiece is formed, and the sixth riveting robot a 36, the sixth riveting robot b 37, and the sixth riveting robot c 38 rivet the sixth workpiece.
The sixth transfer robot 39 is provided with a sixth robot traveling system 39a, and the sixth transfer robot 39 is movable along the sixth robot traveling system 39 a.
The seventh flow drilling and screwing station 7 is provided with a seventh transfer robot a 42, a seventh transfer robot b 43, a seventh flow drilling and screwing robot 44, a seventh flow drilling and screwing jig 45 and a seventh workpiece reverse table 46, the seventh transfer robot a 42 grasps the sixth workpiece output by the sixth upper glued-sizing and riveting station 6 and places the sixth workpiece on the seventh flow drilling and screwing jig 45, the seventh flow drilling and screwing robot 44 performs flow drilling and screwing on the sixth workpiece to form a seventh workpiece, the seventh transfer robot b 43 grasps the seventh workpiece and places the seventh workpiece on the seventh workpiece reverse table 46, and the seventh workpiece reverse table 46 turns over the seventh workpiece.
The seventh transfer robot a 42 is provided with a seventh robot traveling system 42a, and the seventh transfer robot a 42 is movable along the seventh robot traveling system 42 a.
The eighth flow drilling screw station 8 is provided with an eighth transfer robot 47, an eighth gripper placing frame 48, an eighth flow drilling screw robot 49 and an eighth flow drilling point positioning fixture 50, an eighth workpiece gripper is placed on the eighth gripper placing frame 48, the eighth transfer robot 47 is connected with an eighth workpiece gripper on the eighth gripper placing frame 48, the eighth transfer robot 47 grips a seventh workpiece output by the seventh flow drilling screw station 7 through the eighth workpiece gripper and places the seventh workpiece on the eighth flow drilling point positioning fixture 50, and the eighth flow drilling screw robot 49 performs flow drilling screw machining on the seventh workpiece to form an eighth workpiece.
The ninth fixed spot welding station 9 is provided with a ninth transfer robot 51, a ninth gripper placing frame 52, a ninth fixed welding gun 53, and a ninth workpiece reversing table 54, wherein a ninth workpiece gripper is placed on the ninth gripper placing frame 52, the ninth transfer robot 51 is connected to the ninth workpiece gripper placing frame 52, the ninth transfer robot 51 grips the eighth workpiece output from the eighth drilling screw station 8 by the ninth workpiece gripper, the ninth transfer robot 51 grips the eighth workpiece by the ninth fixed welding gun 53 to perform spot welding, thereby forming a ninth workpiece, and after the spot welding is completed, the ninth workpiece is placed on the ninth workpiece reversing table 54, and the ninth workpiece reversing table 54 reverses the ninth workpiece.
The eighth transfer robot a 47 is provided with an eighth robot traveling system 47a, and the eighth transfer robot a 47 is movable along the eighth robot traveling system 47 a.
The tenth spot welding inspection unloading station 10 is provided with a tenth transfer robot 55, a tenth gripper placing frame 56, a tenth spot welding inspection station 57 and a tenth unloading station 58, a tenth workpiece gripper is placed on the tenth gripper placing frame 56, the tenth transfer robot 55 is connected with a tenth workpiece gripper on the tenth gripper placing frame 56, the tenth transfer robot 55 grips the ninth workpiece output from the ninth fixed spot welding station 9 by the tenth workpiece gripper, and the tenth transfer robot 55 transfers the ninth workpiece to the tenth spot welding station 57 or the tenth unloading station 58.
The rear floor production line provided by the embodiment of the invention provides a specific scheme for completing automatic processing of the rear floor of the automobile by adopting robot riveting and drill screw connection, and the specific scheme comprises station layout and arrangement of working equipment of each station, the rear floor processing is completely automated, and compatible execution of various connection processes is realized, so that the production efficiency is high, the product quality is high, and the practical value is very high.
It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.
Claims (12)
1. A method of producing a rear floor, comprising:
the rear floor production line comprises a first upper gluing station, a second riveting station, a third upper gluing station, a fourth upper gluing riveting station, a fifth riveting station, a sixth upper gluing riveting station, a seventh drilling screw station, an eighth drilling screw station, a ninth fixed spot welding station and a tenth sampling inspection lower station which are sequentially arranged;
determining the lapping relation and the assembling process of the plates in the rear floor;
determining respective material properties of the panels in the rear floor;
determining the takt time required by the processing of the rear floor;
selecting a connection process according to the overlapping relation and the material property, and performing a connection experiment of the plate in the rear floor;
the connection experiment comprises a self-piercing riveting connection experiment and/or a flow drilling screw connection experiment;
wherein, the self-piercing riveting connection experiment step comprises: firstly, primarily selecting rivets and riveting dies, wherein the length of the rivets and the types of the riveting dies are preselected according to the sheet thickness size and the layer number of the sheet; performing self-piercing riveting connection on at least two plates; slicing the riveting part, polishing the cross section, and carrying out size measurement and stress test through a metallographic microscope; judging whether the connecting structure of at least two plates is qualified or not; the step of judging whether the connecting structure of at least two plate members is qualified comprises the following steps: judging whether the overlap tensile stress value and/or the minimum thickness and/or the interlocking value and/or the maximum pressure of the riveting part and/or the head height of the rivet reach a target value;
wherein, the flow drill screw connection experiment includes: firstly, primarily selecting the type of a screw and a screwing parameter according to the lap joint relation of the plates; secondly, performing flow drilling screw connection on at least two plates; thirdly, slicing the screw part, polishing the cross section, and carrying out size measurement and torque test through a metallographic microscope; judging whether the connecting structure of at least two plates is qualified or not; the step of judging whether the connecting structure of at least two plates is qualified or not comprises the following steps: judging whether the appearance quality and/or the torsion value and/or the lap tensile stress value of the screw reach a target value;
when the connection experiment result shows that the connection requirement is met, determining a connection process of the plate in the rear floor;
dividing the machining stations of the rear floor according to the lap joint relation of the plates and the connection process between the plates;
performing a robot accessibility test according to the divided stations;
when the accessibility test of the robot meets the requirement and the processing time of the rear floor is within the takt time, determining that the divided stations are reasonable;
and arranging a production site, and producing the rear floor.
2. The rear floor production method as claimed in claim 1, wherein the step of performing the division of the rear floor processing station according to the connection process of the panel members comprises:
and determining the processing batch and the processing sequence of the connecting points between the plate elements in the rear floor.
3. The method for producing the rear floor as claimed in claim 1, wherein the first upper gluing station is provided with a first manual upper table, a first gripper placing table, a first fixed gluing table and a first transfer robot, an operator places a workpiece on the first manual upper table, a first workpiece gripper is placed on the first gripper placing table, the first transfer robot is connected with the first workpiece gripper on the first gripper placing table, the first transfer robot grips the workpiece on the first manual upper table, and the first transfer robot grips the workpiece to the fixed gluing table for gluing to form the first workpiece.
4. The method for producing the rear floor as claimed in claim 1, wherein the second riveting station is provided with a second riveting point positioning fixture, a second riveting robot A, a second riveting robot B, a second transfer robot and a second gripper placing frame, the first workpiece output from the first workpiece gluing station is placed on the second riveting point positioning fixture, a second workpiece gripper is placed on the second gripper placing frame, the first workpiece is riveted by the second riveting robot A and the second workpiece by the second riveting robot B to form a second workpiece, the second workpiece gripper is connected to the second gripper placing frame by the second transfer robot, and the second workpiece gripper is transferred to the next station by the second transfer robot.
5. The rear floor production method according to claim 1, wherein the third upper gluing station is provided with a third upper assembly table, a third gripper placing frame, a third fixed gluing station and a third transfer robot, a third workpiece gripper is placed on the third gripper placing frame, the third transfer robot is connected with the third workpiece gripper on the third gripper placing frame, an operator places a third assembly workpiece on the third upper assembly table, the third transfer robot grips the third assembly workpiece through the third workpiece gripper, the third transfer robot grips the third assembly workpiece to the third fixed gluing station for gluing, places a second workpiece output from the second riveting station on the third upper assembly table, and the third transfer robot assembles the third assembly workpiece with the second workpiece, and forming a third workpiece, and grabbing the third workpiece by the third transfer robot to rotate to the next station.
6. The method for producing a rear floor according to claim 1, wherein the fourth upper gluing and riveting station is provided with a fourth upper worktable, a fourth riveting point positioning fixture, a fourth riveting robot A, a fourth riveting robot B, a fourth riveting robot C, a fourth transfer robot and a fourth gripper placing frame, an operator places a fourth assembly workpiece on the fourth upper worktable, a fourth workpiece gripper is placed on the fourth gripper placing frame, the fourth transfer robot is connected with the fourth workpiece gripper on the fourth gripper placing frame, a third workpiece output by the third upper gluing station is placed on the fourth riveting point positioning fixture, the fourth transfer robot grips the fourth assembly workpiece through the fourth workpiece gripper and transfers the fourth assembly workpiece to the fourth riveting point positioning fixture to be assembled with the third workpiece, and forming a fourth workpiece, and riveting the fourth workpiece by the fourth riveting robot A, the fourth riveting robot B and the fourth riveting robot C.
7. The rear floor production method according to claim 1, wherein a fifth transfer robot, a fifth gripper placing frame and a fifth fixed rivet-increasing device are arranged at the fifth rivet-increasing station, a fifth workpiece gripper is placed on the fifth gripper placing frame, the fifth transfer robot is connected with the fifth workpiece gripper on the fifth gripper placing frame, the fifth transfer robot grips a fourth workpiece output by the fourth upper workpiece gluing and riveting station through the fifth workpiece gripper, and the fifth transfer robot grips the fourth workpiece to the fifth fixed rivet-increasing device for rivet-increasing to form a fifth workpiece.
8. The rear floor production method according to claim 1, wherein the sixth upper gluing and riveting station is provided with a sixth upper work table, a sixth riveting point positioning fixture, a sixth riveting robot A, a sixth riveting robot B, a sixth riveting robot C, a sixth transfer robot, a sixth gripper placing frame and a sixth fixed gluing table, an operator places a sixth assembly workpiece on the sixth upper work table, a sixth workpiece gripper is placed on the sixth gripper placing frame, the sixth transfer robot is connected with the sixth workpiece gripper on the sixth gripper placing frame, a fifth workpiece output by the fifth riveting station is placed on the sixth riveting point positioning fixture, the sixth transfer robot grips the sixth assembly workpiece through the sixth workpiece gripper, the sixth transfer robot grips the sixth assembly workpiece to the sixth fixed gluing table for gluing, and transferring to the sixth riveting point positioning clamp, assembling with a fifth workpiece to form a sixth workpiece, and riveting the sixth workpiece by the sixth riveting robot A, the sixth riveting robot B and the sixth riveting robot C.
9. The method for producing a rear floor according to claim 1, wherein a seventh transfer robot a, a seventh transfer robot b, a seventh transfer screw robot, a seventh transfer point setting jig, and a seventh workpiece reverse table are provided at the seventh transfer screw station, the seventh transfer robot a picks up the sixth workpiece output from the sixth upper glue-applying riveting station and places the sixth workpiece on the seventh transfer point setting jig, the seventh transfer robot performs transfer screw machining on the sixth workpiece to form a seventh workpiece, the seventh transfer robot b picks up the seventh workpiece and places the seventh workpiece on the seventh workpiece reverse table, and the seventh workpiece reverse table turns over the seventh workpiece.
10. The post-floor production method according to claim 1, wherein an eighth transfer robot, an eighth gripper placing frame, an eighth flow drilling screw robot and an eighth flow drilling point setting jig are arranged at the eighth flow drilling screw station, an eighth workpiece gripper is placed on the eighth gripper placing frame, the eighth transfer robot is connected with the eighth workpiece gripper on the eighth gripper placing frame, the eighth transfer robot grips a seventh workpiece output by the seventh flow drilling screw station through the eighth workpiece gripper and places the seventh workpiece on the eighth flow drilling point setting jig, and the eighth flow drilling screw robot performs flow drilling screw processing on the seventh workpiece to form an eighth workpiece.
11. The method for producing a rear floor according to claim 1, wherein a ninth handling robot, a ninth gripper placing frame, a ninth fixed welding gun and a ninth workpiece reversing table are arranged at the ninth fixed spot welding station, a ninth workpiece gripper is placed on the ninth gripper placing frame, the ninth handling robot is connected with the ninth workpiece gripper on the ninth gripper placing frame, the ninth handling robot grips an eighth workpiece output by the eighth drilling screw station through the ninth workpiece gripper, the ninth handling robot grips the eighth workpiece and the ninth fixed welding gun for spot welding to form a ninth workpiece, and after the spot welding is completed, the ninth workpiece is placed on the ninth workpiece reversing table, and the ninth workpiece reversing table reverses the ninth workpiece.
12. The method for producing a rear floor according to claim 1, wherein the tenth spot welding work station is provided with a tenth transfer robot, a tenth gripper placing frame, a tenth spot welding table and a tenth workpiece unloading table, wherein a tenth workpiece gripper is placed on the tenth gripper placing frame, the tenth transfer robot is connected with the tenth workpiece gripper on the tenth gripper placing frame, the tenth transfer robot grips a ninth workpiece output from the ninth fixed spot welding work station through the tenth workpiece gripper, and the tenth transfer robot transfers the ninth workpiece to the tenth spot welding table or the tenth workpiece unloading table.
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| CN112355540B (en) * | 2020-10-13 | 2022-06-28 | 重庆至信实业集团有限公司 | Production line for producing automobile floors of different models |
| CN112975288B (en) * | 2021-02-24 | 2022-09-13 | 江苏北人智能制造科技股份有限公司 | Automobile floor production line |
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