Aluminum plate edge rolling management method

Abstract

The application provides an aluminum plate rolling edge management method, which comprises the following steps: detecting the specification parameters of an outer plate; comparing the specification parameters with preset parameters, and stamping the outer plate according to the comparison result to form a bent flange on the edge of the outer plate; detecting and recording a first R angle value between the outer plate and the flange; performing a rolling edge treatment on the flange to make the flange bent and clamp an inner plate together with the outer plate; detecting and recording a second R angle value between the outer plate and the flange; judging whether the first R angle value is greater than or equal to a first preset value and generating a first judgment result; judging whether the second R angle value is greater than or equal to a second preset value and generating a second judgment result; and associating and saving the first R angle value, the second R angle value, the first judgment result and the second judgment result. The technical scheme can quickly find the real cause of cracking of the plate material, ensure that the cracking phenomenon does not occur after rolling edge in mass production, and improve the product yield.

Description

Technical Field

[0001] This invention relates to the field of automotive door panel technology, and in particular to a method for controlling the rolling edges of aluminum sheets. Background Technology

[0002] Car door panel folding is a technology that uses robots to fold the edges together to join the inner and outer panels of the door panel. The robot rollers roll the folded outer panel multiple times to wrap the inner panel.

[0003] Currently, most car manufacturers use sheet metal for door panels with rolled edges. With the continuous advancement of automotive lightweighting, aluminum sheets are gradually being used in door panel components. However, because the material properties of aluminum sheets change over time, this eventually leads to cracking after the rolled edges are applied.

[0004] In existing technologies, there is a general lack of control over cracking of aluminum sheet edges. The cause of cracking after aluminum sheet edge rolling cannot be traced, making it difficult to develop effective countermeasures and ensuring that cracking does not occur during mass production. Summary of the Invention

[0005] The main objective of this invention is to provide a method for controlling the edge rolling of aluminum plates, which aims to solve the technical problems in the prior art where cracking of aluminum plates after edge rolling is difficult to trace, making it difficult to take effective countermeasures and ensuring that cracking after edge rolling does not occur during mass production.

[0006] To achieve the above objectives, the present invention proposes a method for controlling the rolling edge of aluminum plates, the method comprising:

[0007] Inspect the specifications and parameters of the outer panel;

[0008] The specified parameters are compared with preset parameters, and the outer panel is stamped according to the comparison results to form a bent flange on the edge of the outer panel;

[0009] Detect and record the first radius (R) value between the outer panel and the flange;

[0010] The flange is rolled to bend it and fit with the outer plate to clamp the inner plate.

[0011] Detect and record the second radius (R) value between the outer panel and the flange;

[0012] Determine whether the first R-angle value is greater than or equal to a first preset value and generate a first determination result; determine whether the second R-angle value is greater than or equal to a second preset value and generate a second determination result;

[0013] Associate and save the first R-angle value, the second R-angle value, the first judgment result, and the second judgment result.

[0014] Optionally, after the step of detecting and recording the first radius (R) value between the outer panel and the flange, the method further includes:

[0015] Obtain the time point for the heat treatment of the outer panel;

[0016] Calculate the interval duration of the heat treatment of the outer panel based on the aforementioned time points;

[0017] Determine whether the interval duration is greater than a preset duration;

[0018] Based on the judgment result, the step of "rolling the edge of the flange" is executed.

[0019] Optionally, the preset duration is 90 days.

[0020] Optionally, after the step of associating and saving the first R-angle value, the second R-angle value, the first judgment result, and the second judgment result, the method further includes:

[0021] Check whether the outer panel is cracked;

[0022] When the outer panel cracks, the node information of the crack is determined based on the first judgment result and the second judgment result.

[0023] Optionally, after the step of detecting whether the outer panel is cracked, the method further includes:

[0024] Inspect the degree of cracking in the outer panel;

[0025] Adjust the first R-angle value and / or the second R-angle value according to the degree of cracking.

[0026] Optionally, the first preset value is the thickness of the outer panel; the thickness of the outer panel is 0.9mm to 1mm.

[0027] Optionally, the second preset value is half the thickness of the inner plate.

[0028] Optionally, the thickness of the inner plate is 0.8 mm to 0.9 mm.

[0029] Optionally, the step of performing a rolling process on the flange to bend the flange and cooperate with the outer panel to clamp the inner panel includes:

[0030] The flange is rolled to allow it to continue bending until it is parallel to the outer panel.

[0031] Press the edge of the flange until it abuts against the inner panel, so that the edge of the flange cooperates with the outer panel to clamp the inner panel.

[0032] Optionally, the specifications include tensile strength coefficient, yield strength coefficient, and elongation. The step of comparing the specifications with preset parameters and stamping the outer panel according to the comparison results includes:

[0033] Determine whether the tensile strength coefficient is greater than or equal to 215 MPa;

[0034] Determine whether the yield strength coefficient is within the range of 100MPa to 155MPa;

[0035] Determine whether the elongation is greater than or equal to 27;

[0036] When the tensile strength coefficient is greater than or equal to 215 MPa, the yield strength coefficient is in the range of 100 MPa to 155 MPa, and the elongation is greater than or equal to 27, the outer plate is stamped.

[0037] The technical solution of this invention quantifies and manages each operation during the processing of sheet materials, strictly controlling the radius (R) angle between the outer sheet and the flange to meet the rolling edge requirements, thus ensuring that the outer sheet does not crack after rolling. For sheet materials that do crack, the recorded results can be traced back to quickly identify the root cause of the crack and rapidly implement countermeasures, ensuring that cracking after rolling does not occur during mass production and improving product yield. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0039] Figure 1 This is a flowchart illustrating the first embodiment of the aluminum plate edge control method of the present invention;

[0040] Figure 2 This is a flowchart illustrating the second embodiment of the aluminum plate edge control method of the present invention;

[0041] Figure 3 This is a flowchart illustrating the third embodiment of the aluminum plate edge control method of the present invention;

[0042] Figure 4 This is a flowchart illustrating the fourth embodiment of the aluminum plate edge control method of the present invention;

[0043] Figure 5 This is a flowchart illustrating the fifth embodiment of the aluminum plate edge control method of the present invention;

[0044] Figure 6 This is a flowchart illustrating the sixth embodiment of the aluminum plate edge control method of the present invention;

[0045] Figure 7 This is a schematic diagram of the first embodiment of the outer plate in the aluminum plate edge control method of the present invention;

[0046] Figure 8 This is a schematic diagram of the second embodiment of the outer plate in the aluminum plate edge control method of the present invention.

[0047] Explanation of icon numbers:

[0048] 10 outer panel 11 Flip-edge 20 Inner panel

[0049] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0050] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0051] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0052] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0053] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0054] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0055] This invention proposes a method for controlling the rolling edge of aluminum plates. Please refer to [the relevant documentation]. Figure 1 , Figure 1 This is a flowchart illustrating the first embodiment of the aluminum plate edge rolling control method of the present invention. The aluminum plate edge rolling control method includes the following steps:

[0056] Step S10: Check the specifications of the outer panel;

[0057] Step S20: Compare the specified parameters with the preset parameters, and stamp the outer panel according to the comparison result;

[0058] Step S30: Detect and record the first R angle value between the outer plate 10 and the flange 11;

[0059] Step S40: Perform edge rolling on the flange 11;

[0060] Step S50: Detect and record the second R angle value between the outer plate 10 and the flange 11;

[0061] Step S60: Determine whether the first R-angle value is greater than or equal to a first preset value and generate a first determination result; determine whether the second R-angle value is greater than or equal to a second preset value and generate a second determination result;

[0062] Step S70: Associate and save the first R-angle value, the second R-angle value, the first judgment result, and the second judgment result.

[0063] Before processing the outer panel 10, the specifications of the outer panel 10 need to be tested to ensure that no cracking occurs during the bending process of the outer panel 10.

[0064] The outer panel 10 is processed only when its specifications meet the preset parameters. If the specifications of the outer panel 10 do not meet the preset parameters, the outer panel 10 needs to be replaced.

[0065] The preset parameters can be adjusted using experimental data. For example, this can be achieved by bending boards of various specifications and saving the experimental results in association with the specifications.

[0066] First, the outer panel 10 is stamped by a machine, causing the edge portion of the outer panel 10 to bend, and the bent edge portion forms the flange 11. The flange 11 is smoothly connected to the outer panel 10, and the connection position between the outer panel 10 and the flange 11 is rounded.

[0067] After stamping is completed, the radius is measured and the value is recorded, which is denoted as the first radius value.

[0068] Before the hemming is performed, the front side of the inner panel 20 is attached to the surface of the outer panel 10, wherein the inner panel 20 is located on the same side as the bending direction of the flange 11. The back side of the inner panel 20 then faces the bending direction of the flange 11.

[0069] After the inner panel 20 is assembled, the flange 11 is rolled. Specifically, the flange 11 is bent until it abuts against the back of the inner panel 20, thereby cooperating with the outer panel 10 to clamp the inner panel 20 and fix it in place.

[0070] After the hemming is completed, the position of the rounded corner is checked and the value is recorded, which is denoted as the second R-corner value.

[0071] To prevent the outer panel 10 from cracking after rolling, the first radius (R) angle value is checked to determine whether it is greater than or equal to the first preset value, and a corresponding first judgment result is generated. Similarly, the second radius (R) angle value is checked and a corresponding second judgment result is generated. The first and second judgment results ensure that the outer panel 10 will not crack after rolling.

[0072] When the outer panel 10 cracks, the cause of the crack can be distinguished by the first judgment result and the second judgment result. For example, if the first judgment result does not meet the requirements, it means that the cause of the crack in the outer panel 10 is at the stamping node; if the second judgment result does not meet the requirements, it means that the cause of the crack in the outer panel 10 is at the hemming node.

[0073] The first preset value can be set to the thickness d of the outer panel 10, where d ranges from 0.9 mm to 1 mm. That is, when the first R-angle value is greater than or equal to d, it indicates that the first judgment result meets the production requirements; when the first R-angle value is less than d, it indicates that the first judgment result does not meet the production requirements.

[0074] Additionally, the second preset value can be set to the thickness D of the inner plate 20, where D ranges from 0.8mm to 0.9mm. That is, when the second radius (R) angle value is greater than or equal to D / 2, it indicates that the second judgment result meets production requirements; when the second radius (R) angle value is less than D / 2, it indicates that the second judgment result does not meet production requirements. Typically, the second radius (R) angle value needs to be greater than 0.3mm.

[0075] It should be noted that during the production process, processing information of other production nodes can also be recorded, so that when the outer panel 10 cracks, the cause of the cracking of the outer panel 10 can be determined by different processing information at any processing node.

[0076] The technical solution of this invention quantifies and manages each operation during the processing of the board material, strictly controlling the radius (R) angle between the outer board 10 and the flange 11 to meet the edge-rolling requirements, ensuring that the outer board 10 does not crack after edge-rolling. For board materials that do crack, the recorded results can be traced back to quickly identify the root cause of the crack and rapidly implement countermeasures, ensuring that cracking after edge-rolling does not occur during mass production, thus improving product yield.

[0077] Further, please refer to Figure 2 , Figure 2 This is a flowchart illustrating the second embodiment of the aluminum plate edge rolling control method of the present invention. After step S30, the method further includes:

[0078] Step S80: Obtain the time point of the heat treatment of the outer panel;

[0079] Step S90: Calculate the interval duration of the heat treatment of the outer panel based on the time node;

[0080] Step S100: Determine whether the interval duration is greater than a preset duration;

[0081] Step S110: Step S40 is executed based on the judgment result.

[0082] When the raw material of the outer panel 10 leaves the factory, it needs to be heat-treated. Heat treatment of aluminum plates is a relatively mature technical solution in this field, and will not be elaborated here.

[0083] The outer panel 10 material has its heat treatment date recorded when it leaves the factory; this treatment date is the aforementioned time node. Operators can obtain this time node by querying, for example, based on purchase orders or through communication with upstream manufacturers.

[0084] Based on the stated time point and the current processing date, the interval between processing the outer panel 10 and its heat treatment can be calculated. This interval is then compared to a preset time.

[0085] The preset duration can be set to 90 days. The preset duration is a value obtained through long-term experience accumulation. When dealing with the outer panel 10 made of different materials, it can be adjusted according to experimental data.

[0086] When the time interval is greater than 90 days, the outer panel 10 is prone to cracking during bending, thus requiring replacement. When the time interval is less than 90 days, the outer panel 10 is processed normally.

[0087] Further, please refer to Figure 3 , Figure 3 This is a flowchart illustrating the third embodiment of the aluminum plate edge rolling control method of the present invention. After step S70, the method further includes:

[0088] Step S120: Detect whether the outer panel is cracked;

[0089] Step S130: When the outer panel cracks, determine the node information of the crack in the outer panel based on the first judgment result and the second judgment result.

[0090] After the outer panel 10 is processed, it is also necessary to perform crack detection on the outer panel 10. In order to improve production efficiency, the detection can be performed only on the bending position of the outer panel 10.

[0091] When a crack is detected on the outer panel 10, the process can be traced back based on the first and second judgment results recorded during the production process. For example, if the first judgment result is found to be abnormal, it indicates that the abnormality occurred during the stamping process of the outer panel 10. Therefore, the stamping equipment needs to be re-inspected or adjusted, and the cause of the abnormality can be further investigated based on the inspection or adjustment results, thereby improving the investigation efficiency and ensuring that production can be resumed as soon as possible.

[0092] Further, please refer to Figure 4 , Figure 4 This is a flowchart illustrating the fourth embodiment of the aluminum plate edge rolling control method of the present invention. After step S120, the method further includes:

[0093] Step S140: Detect the degree of cracking in the outer panel;

[0094] Step S150: Adjust the first R angle value and / or the second R angle value according to the degree of cracking.

[0095] When a crack is detected in the outer panel 10, the degree of cracking is further assessed. For example, the degree of cracking is graded based on the size of the crack in the outer panel 10. Production data is then adjusted according to the different degrees of cracking.

[0096] In this embodiment, for example, when the degree of cracking is large, the possibility of the outer panel 10 cracking during processing can be reduced by appropriately reducing the size of the first R angle value and / or the second R angle value.

[0097] Further, please refer to Figure 5 , Figure 5 This is a flowchart illustrating the fifth embodiment of the aluminum plate edge rolling control method of the present invention. Step S40 includes:

[0098] Step S41: Perform edge rolling on the flange 11;

[0099] Step S42: Press the edge portion of the flange 11 until it abuts against the inner plate 20.

[0100] Please refer to Figure 7 During the hemming process, the flange 11 is further bent until it rotates 180°, thus ensuring that the flange 11 remains parallel to the outer panel 10. The inner panel 20 is located between the outer panel 10 and the flange 11.

[0101] After the flange 11 is bent to 180°, the flange 11 is bent further so that the bending angle of the flange 11 is slightly greater than 180°, so that the flange 11 can abut against the inner plate 20 to achieve a clamping effect.

[0102] To further reduce cracking of the outer panel 10, please refer to... Figure 8 After the flange 11 is bent to 180°, the edge of the flange 11 is pressed or punched, thereby deforming the edge portion of the flange 11 and bringing it closer to the outer plate 10, where it abuts against the inner plate 20 to achieve a clamping effect. By pressing or punching a second time, the edge rolling effect can be further guaranteed while the rounded corner portion of the bend does not deform, thus improving the crack prevention effect.

[0103] Further, please refer to Figure 6 , Figure 6 This is a flowchart illustrating the fourth embodiment of the aluminum plate edge control method of the present invention. The specifications also include tensile strength coefficient, yield strength coefficient, and elongation. Step S20 includes:

[0104] Step S21: Determine whether the tensile strength coefficient is greater than or equal to 215 MPa;

[0105] Step S22: Determine whether the yield strength coefficient is within the range of 100MPa to 155MPa;

[0106] Step S23: Determine whether the elongation is greater than or equal to 27;

[0107] Step S24: When the tensile strength coefficient is greater than or equal to 215 MPa, the yield strength coefficient is in the range of 100 MPa to 155 MPa, and the elongation is greater than or equal to 27, the outer plate is stamped.

[0108] The tensile strength coefficient, the yield strength coefficient, and the elongation are compared respectively, wherein the preset parameter corresponding to the tensile strength coefficient is greater than or equal to 215 MPa, the preset parameter corresponding to the yield strength coefficient is greater than or equal to 100 MPa and less than or equal to 155 MPa, and the preset parameter for the elongation is greater than or equal to 27.

[0109] When the specifications of the outer panel 10 meet the above three requirements at the same time, it means that the material of the outer panel 10 is qualified and can be stamped, and step S10 can be started.

[0110] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A method for controlling the edge rolling of aluminum plates, characterized in that, The method for controlling the rolling edge of aluminum plates includes: Inspect the specifications and parameters of the outer panel; The specifications are compared with preset parameters. If the specifications of the outer panel do not meet the preset parameters, the outer panel is replaced. If the specifications of the outer panel meet the preset parameters, the outer panel is stamped to form a bent flange on the edge of the outer panel. The connection between the outer panel and the flange is rounded. Detect and record the first radius (R) angle value between the outer panel and the flange; The flange is rolled so that it bends and mates with the outer plate to clamp the inner plate. Detect and record the second radius (R) value between the outer panel and the flange; Determine whether the first R-angle value is greater than or equal to a first preset value and generate a first determination result; determine whether the second R-angle value is greater than or equal to a second preset value and generate a second determination result; Associate and save the first R-angle value, the second R-angle value, the first judgment result, and the second judgment result; Check whether the outer panel is cracked; When the outer panel cracks, the node information of the crack is determined based on the first judgment result and the second judgment result; Detect the degree of cracking in the outer panel; Adjust the first R-angle value and / or the second R-angle value according to the degree of cracking.

2. The aluminum plate edge rolling control method according to claim 1, characterized in that, After the step of detecting and recording the first radius (R) value between the outer panel and the flange, the method further includes: Obtain the time point for the heat treatment of the outer panel; The time interval between the processing of the outer panel and the heat treatment time is calculated based on the time node and the current processing date. Determine whether the interval duration is greater than a preset duration; When the interval is longer than the preset time, the outer panel is replaced; when the interval is shorter than the preset time, the outer panel is rolled.

3. The aluminum plate edge rolling control method according to claim 2, characterized in that, The preset duration is 90 days.

4. The aluminum plate edge rolling control method according to claim 1, characterized in that, The first preset value is the thickness of the outer panel; the thickness of the outer panel is 0.9mm to 1mm.

5. The aluminum plate edge rolling control method according to claim 1, characterized in that, The second preset value is half the thickness of the inner plate.

6. The aluminum plate edge rolling control method according to claim 5, characterized in that, The thickness of the inner plate is 0.8mm to 0.9mm.

7. The aluminum plate edge rolling control method according to claim 1, characterized in that, The step of performing a rolling process on the flange to bend the flange and clamp the inner panel with the outer panel includes: The flange is rolled to allow it to continue bending until it is parallel to the outer panel. Press the edge of the flange until it abuts against the inner panel, so that the edge of the flange cooperates with the outer panel to clamp the inner panel.

8. The method for controlling the rolling edge of aluminum plates according to claim 1, characterized in that, The specifications include tensile strength coefficient, yield strength coefficient, and elongation. The steps of comparing the specifications with preset parameters and stamping the outer panel according to the comparison results include: Determine whether the tensile strength coefficient is greater than or equal to 215 MPa; Determine whether the yield strength coefficient is within the range of 100 MPa to 155 MPa; Determine whether the elongation is greater than or equal to 27%; When the tensile strength coefficient is greater than or equal to 215 MPa, the yield strength coefficient is in the range of 100 MPa to 155 MPa, and the elongation is greater than or equal to 27%, the outer plate is stamped.

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