Forming method for reinforcing plate of automobile rear floor assembly

Abstract

The invention discloses a forming method for a reinforcing plate of an automobile rear floor assembly. The forming method comprises the following steps that S1, a base plate is cut and pressed; s2, primary perforation and cutting are carried out, and a stress release material plate is reserved between the cut positions of the front end and the rear end of the laminated base plate and the rear floor wing plate; s3, carrying out secondary cutting; s4, curved surface shaping; s5, perforating for the second time; s6, cutting and trepanning the drainage opening material; and S7, shaping and discharging: grinding, polishing, standing and detecting the cut and perforated parts, and then discharging. The problems that according to a common automobile rear floor assembly upper reinforcing plate forming method, in the process, the continuity of the bending degree of curved surface forming is poor, narrow-size large-angle arc cutting operation is difficult, stress release at the machining position is insufficient, and consequently the machining quality is poor can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts manufacturing, in particular to a method for forming an automobile rear floor assembly reinforcement plate. Background Art

[0002] The rear floor assembly of a car is an important part of the car body in white and the foundation of the whole vehicle. It supports the weight of the upper body, opening and closing parts and other assemblies and related accessories, as well as the weight of passengers. At the same time, it bears the load, vibration, impact and torque generated by the movement of the car. Since the car parts are distributed in different positions, the load, vibration, impact and torque generated at different positions of the rear floor of the car are different. Therefore, the processing requirements for each area of ​​the rear floor of the car are different during the automobile processing process.

[0003] The common reinforcement plate forming of the rear floor assembly of an automobile generally requires operations such as curved surface processing, hole opening, and sprue material cutting. However, the common forming methods and processes have the problems of poor continuity of the curved degree of the curved surface forming, difficulty in operating the large-angle arc cutting of small sizes, and insufficient stress release at the above-mentioned processing points, resulting in poor processing quality. Summary of the invention

[0004] The purpose of the present invention is to provide a method for forming a reinforcement plate of a rear floor assembly of an automobile in order to solve the problems of poor continuity of the bending degree of curved surface forming, difficulty in operating a narrow-sized large-angle arc cutting operation, and insufficient stress release at the above-mentioned processing point, resulting in poor processing quality, and to solve the problems of poor processing quality in a common method for forming a reinforcement plate of a rear floor assembly of an automobile.

[0005] In order to achieve the above object, the present invention adopts the following technical solution: a method for forming a reinforcement plate of a rear floor assembly of an automobile, comprising the following steps:

[0006] S1, cutting and pressing of substrate: cutting the plate into a substrate having a size larger than the rear floor assembly of the automobile, positioning the rear floor assembly of the automobile on the substrate and pressing the curved bottom surface of the rear floor wing panel on the substrate;

[0007] S2, one-time perforation and cutting: perforating the first perforation area on the rear floor body on the inner side of the rear floor wing, and perforating and shaping the second perforation area, cutting the laminated substrate at the outer side of the rear floor wing, and cutting the front and rear corners of the two, leaving a stress release sheet between the cutting parts of the front and rear ends;

[0008] S3, secondary cutting: cutting the stress release sheet and the front cutting area and the rear cutting area of ​​the rear floor wing panel and the base plate respectively, and shaping the step-shaped structure at the cutting position of the front cutting area and the rear cutting area;

[0009] S4, curved surface shaping: bending the edges of the rear floor wing panel and the base panel downward in the lateral and axial directions in sequence;

[0010] S5, secondary perforation: the rear floor wing plate and the two ends of the base plate at the axis are respectively cut out to form a first notch and a second notch, and the rear floor body and the rear floor wing plate are respectively perforated in the lateral third perforation area and punched in the countersunk hole area;

[0011] S6, cutting and punching of nozzle material: cutting a third notch between the nozzle materials at the axis of the rear floor body, cutting the nozzle material, and punching a special-shaped hole in the fourth perforation area on the countersunk hole area;

[0012] S7, shaping and discharging: After grinding, polishing, standing and testing the cut and perforated parts, discharging is carried out.

[0013] As a further description of the above technical solution:

[0014] The rear floor wing plate and the base plate are positioned in the vertical direction by a pressure rod, a pressure roller at the end of the pressure rod is pressed onto the rear floor wing plate, and a positioning column is mounted on the base plate at the edge of the rear floor wing plate.

[0015] As a further description of the above technical solution:

[0016] The thickness of the substrate is 1-2 mm. In step S2, a margin of 0.2-0.4 mm is left at the perforations of the first perforated area, and a margin of 0.2-0.3 mm is left at the perforations of the second perforated area.

[0017] As a further description of the above technical solution:

[0018] In step S2, a margin of 0.2-0.5mm is set at the cutting point of the rear floor wing panel and the front end of the base plate, and a margin of 0.6-0.7mm is set at the cutting corners of the two. A margin of 0.3-0.7mm is set at the cutting point of the rear end of the rear floor wing panel and the base plate, and a margin of 1.2-1.4mm is set at the cutting corners of the two.

[0019] As a further description of the above technical solution:

[0020] Before cutting the front cutting area and the rear cutting area in step 3, a plurality of notches are cut at intervals at the axis of the rear end of the rear floor wing, and a margin of 0.3-0.6 mm is left at the cutting of the notches.

[0021] As a further description of the above technical solution:

[0022] In step 3, a margin of 0.2-0.4 mm is left at the cutting portion of the stress release sheet, and a margin of 0.3-0.5 mm and a margin of 1.2-1.4 mm are left at the inner side and the edge of the cutting portion of the front cutting area, respectively.

[0023] As a further description of the above technical solution:

[0024] After steps 2 and 5 are completed, the rear floor body is marked by a mold.

[0025] In summary, due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0026] The present invention ensures the continuity of the curvature of the curved surface by cutting in steps with reserved curved edges of the stress release plate, wherein the straight section (angle change is greater than a set value) and the curved section (angle change is greater than the set value) of the cutting are respectively accurately set with margins, thereby further improving the quality of the curved surface forming; the rear floor opening is accurately designed with margins, thereby ensuring the stress release during the processing of the base plate, the rear floor body, and the wing plate; the cutting at the nozzle material in the rear floor body is performed by first punching a plurality of notches and then cutting on one side, thereby ensuring the high-quality forming of the rear floor assembly card plate at the nozzle material, avoiding the operation difficulty caused by the cutting operation in a narrow gap and the poor processing quality caused by insufficient stress release; the design of the above-mentioned operation interspersed with the bending operation can ensure the forming quality of the special-shaped and curved automobile rear floor assembly reinforcement plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 A material strip and product structure change process corresponding to a method for forming a reinforcement plate of a rear floor assembly of an automobile Figure 1 .

[0029] Figure 2 A material strip and product structure change process corresponding to a method for forming a reinforcement plate of a rear floor assembly of an automobile Figure 2 .

[0030] Legend:

[0031] 1. Rear floor main body; 2. Rear floor wing plate; 3. Base plate; 4. First perforation area; 5. Stress release plate; 6. Front cutting area; 7. Rear cutting area; 8. Second perforation area; 9. First notch; 10. Second notch; 11. Countersunk hole area; 12. Third perforation area; 13. Third notch; 14. Fourth perforation area; 15. Water inlet material. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] Embodiment 1:

[0035] See also Figure 1-2 The present invention provides a technical solution: a method for forming a reinforcement plate of a rear floor assembly of an automobile, comprising the following steps:

[0036] S1, cutting and pressing of substrate: cutting the plate into a substrate 3 having a size larger than the rear floor assembly of the automobile, positioning the rear floor assembly of the automobile on the substrate 3 and pressing the curved bottom surface of the rear floor wing panel 2 on the substrate 3;

[0037] S2, primary perforation and cutting: perforate the first perforated area 4 on the rear floor body 1 on the inner side of the rear floor wing 2, and perforate and shape the second perforated area 8, cut the outer part of the rear floor wing 2 after pressing the base plate 3, and cut the four corners of the front and rear ends of the two, leaving a stress release sheet 5 between the cutting parts of the front and rear ends;

[0038] S3, secondary cutting: cutting the stress release sheet 5 and the front cutting area 6 and the rear cutting area 7 of the rear floor wing panel 2 and the base plate 3 respectively, and shaping the step-shaped structure at the cutting of the front cutting area 6 and the rear cutting area 7;

[0039] S4, curved surface shaping: bending the edges of the rear floor wing panel 2 and the base panel 3 downward in the lateral and axial directions in sequence;

[0040] S5, secondary perforation: the rear floor wing plate 2 and the base plate 3 are respectively cut out with a first notch 9 and a second notch 10 at both ends of the axis, and the rear floor body 1 and the rear floor wing plate 2 are respectively perforated with a lateral third perforation area 12 and punched with a countersunk hole area 11;

[0041] S6, cutting and punching of nozzle material: cutting the third notch 13 between the nozzle materials 15 at the axis of the rear floor body 1, cutting the nozzle material 15, and punching the special-shaped hole in the fourth perforated area 14 on the countersunk hole area 11;

[0042] S7, shaping and discharging: After grinding, polishing, standing and testing the cut and perforated parts, discharging is carried out.

[0043] The rear floor wing 2 and the base plate 3 are positioned in the vertical direction by a pressure rod, a pressure roller at the end of the pressure rod is pressed onto the rear floor wing 2 , and a positioning column is mounted on the base plate 3 at the edge of the rear floor wing 2 .

[0044] The thickness of the substrate 3 is 1-2 mm. In step S2, a margin of 0.2-0.4 mm is left at the perforations of the first perforated area 4, and a margin of 0.2-0.3 mm is left at the perforations of the second perforated area 8.

[0045] In step S2, a margin of 0.2-0.5mm is set at the cutting front end of the rear floor wing 2 and the base plate 3, and a margin of 0.6-0.7mm is set at the cutting corners of the two. A margin of 0.3-0.7mm is set at the cutting rear end of the rear floor wing 2 and the base plate 3, and a margin of 1.2-1.4mm is set at the cutting corners of the two.

[0046] Before cutting the front cutting area 6 and the rear cutting area 7 in step 3, a plurality of notches are cut at intervals at the axis of the rear end of the rear floor wing 2, and a margin of 0.3-0.6 mm is left at the cutting of the notches.

[0047] In step 3, a margin of 0.2-0.4 mm is left at the cutting position of the stress release sheet 5, and a margin of 0.3-0.5 mm and a margin of 1.2-1.4 mm are left at the inner side and the edge of the cutting position of the front cutting area 6, respectively.

[0048] After steps 2 and 5 are completed, the rear floor body 1 is marked by a mold.

[0049] Embodiment 2:

[0050] On the basis of the above-mentioned first embodiment, preferably, the thickness of the substrate 3 is 1.2 mm, and a margin of 0.3 mm is left at the perforation of the first perforated area 4 .

[0051] In summary, due to the adoption of the above technical solution, the method for forming a reinforcement plate of a rear floor assembly of an automobile in this embodiment has the following beneficial effects compared with the prior art:

[0052] The present invention ensures the continuity of the curvature of the curved surface by cutting in steps with reserved curved edges of the stress release plate, wherein the straight section (angle change is greater than a set value) and the curved section (angle change is greater than the set value) of the cutting are respectively accurately set with margins, thereby further improving the quality of the curved surface forming; the rear floor opening is accurately designed with margins, thereby ensuring the stress release during the processing of the base plate, the rear floor body, and the wing plate; the cutting at the nozzle material in the rear floor body is performed by first punching a plurality of notches and then cutting on one side, thereby ensuring the high-quality forming of the rear floor assembly card plate at the nozzle material, avoiding the operation difficulty caused by the cutting operation in a narrow gap and the poor processing quality caused by insufficient stress release; the design of the above-mentioned operation interspersed with the bending operation can ensure the forming quality of the special-shaped and curved automobile rear floor assembly reinforcement plate.

[0053] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for forming a reinforcement plate of a rear floor assembly of an automobile, It is characterized in that The following steps are involved: S1, cutting and pressing of substrate: cutting the plate into a substrate having a size larger than the rear floor assembly of the automobile, positioning the rear floor assembly of the automobile on the substrate and pressing the curved bottom surface of the rear floor wing panel on the substrate; S2, one-time perforation and cutting: perforating the first perforation area on the rear floor body on the inner side of the rear floor wing, and perforating and shaping the second perforation area, cutting the laminated substrate at the outer side of the rear floor wing, and cutting the front and rear corners of the two, leaving a stress release sheet between the cutting parts of the front and rear ends; S3, secondary cutting: cutting the stress release sheet and the front cutting area and the rear cutting area of ​​the rear floor wing panel and the base plate respectively, and shaping the step-shaped structure at the cutting position of the front cutting area and the rear cutting area; S4, curved surface shaping: bending the edges of the rear floor wing panel and the base panel downward in the lateral and axial directions in sequence; S5, secondary perforation: the rear floor wing plate and the two ends of the base plate at the axis are respectively cut out to form a first notch and a second notch, and the rear floor body and the rear floor wing plate are respectively perforated in the lateral third perforation area and punched in the countersunk hole area; S6, cutting and punching of nozzle material: cutting a third notch between the nozzle materials at the axis of the rear floor body, cutting the nozzle material, and punching a special-shaped hole in the fourth perforation area on the countersunk hole area; S7, shaping and discharging: After grinding, polishing, standing and testing the cut and perforated parts, discharging is carried out.

2. A method for forming a reinforcement plate of a rear floor assembly of an automobile according to claim 1, It is characterized in that The rear floor wing plate and the base plate are positioned in the vertical direction by a pressure rod, a pressure roller at the end of the pressure rod is pressed onto the rear floor wing plate, and a positioning column is mounted on the base plate at the edge of the rear floor wing plate.

3. A method for forming a reinforcement plate of a rear floor assembly of an automobile according to claim 1, It is characterized in that The thickness of the substrate is 1-2 mm. In step S2, a margin of 0.2-0.4 mm is left at the perforations of the first perforated area, and a margin of 0.2-0.3 mm is left at the perforations of the second perforated area.

4. A method for forming a reinforcement plate of a rear floor assembly of an automobile according to claim 1, It is characterized in that In step S2, a margin of 0.2-0.5mm is set at the cutting point of the rear floor wing panel and the front end of the base plate, and a margin of 0.6-0.7mm is set at the cutting corners of the two. A margin of 0.3-0.7mm is set at the cutting point of the rear end of the rear floor wing panel and the base plate, and a margin of 1.2-1.4mm is set at the cutting corners of the two.

5. A method for forming a reinforcement plate of a rear floor assembly of an automobile according to claim 1, It is characterized in that Before cutting the front cutting area and the rear cutting area in step 3, a plurality of notches are cut at intervals at the axis of the rear end of the rear floor wing, and a margin of 0.3-0.6 mm is left at the cutting position of the notches.

6. A method for forming a reinforcement plate of a rear floor assembly of an automobile according to claim 1, It is characterized in that In step 3, a margin of 0.2-0.4 mm is left at the cutting portion of the stress release sheet, and a margin of 0.3-0.5 mm and a margin of 1.2-1.4 mm are left at the inner side and the edge of the cutting portion of the front cutting area, respectively.

7. A method for forming a reinforcement plate of a rear floor assembly of an automobile according to claim 1, It is characterized in that After steps 2 and 5 are completed, the rear floor body is marked by a mold.

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