A welding process for aluminum alloy door panels

Abstract

The application discloses a kind of welding processes of aluminium alloy door plate, the aluminium alloy door plate includes frame and door plate, the door plate is fixedly installed in the frame, the frame includes upper edge section bar, lower edge section bar, left edge section bar and right edge section bar, the upper edge section bar, lower edge section bar, left edge section bar and right edge section bar are enclosed the frame, the door plate is spliced by multiple door plate section bars, the aluminium alloy door plate welding process includes the following steps: the door plate section bar is spliced into door plate, and weld joint is equipped between adjacent door plate section bar;The upper edge section bar and lower edge section bar are respectively welded in the upper and lower ends of the door plate, then the left edge section bar and right edge section bar are welded with the upper edge section bar and lower edge section bar and form frame;The left edge section bar and right edge section bar are respectively welded in the left and right sides of the door plate;Along the weld joint, the door plate section bar is welded and fixed, and welding is completed.The aluminium alloy door plate welding process provided by the application is simple, and welding deformation is not easy to occur, and product consistency is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding process of aluminum alloy door plate, and particularly relates to a welding process of aluminum alloy door plate. BACKGROUND

[0002] Aluminum alloy is an ideal material for the development of light commercial vehicles, and has good thermal conductivity. The post-weld product form of thin-walled profiles is difficult to control, resulting in a large amount of time required to adjust the appearance of the product after welding, and is also a difficult problem for the aluminum alloy welding industry. The van door plate is assembled by using aluminum alloy extruded profiles and welded by using traditional manual MIG process with special tooling. Due to the thin wall of the door plate profile, the MIG welding heat input is large, and the door plate deforms seriously after welding. A certain counter-deformation is applied to the tooling before welding to prevent deformation. In addition, the batch door plate has poor consistency after welding, and manual correction is required to ensure quality. Furthermore, the manual MIG welding process for welding thin-walled profiles has high heat input and large shrinkage, and the welding process is not easy to control. The door plate deforms greatly, and it is difficult to correct after welding. In addition, the thin wall is easy to damage the workpiece during correction, the production efficiency of the finished product is low, and the quality is uncontrollable. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a welding process for an aluminum alloy door plate, which has simple process, is not easy to deform during welding, and has high product consistency.

[0004] To solve the above technical problems, the present application provides a welding process for an aluminum alloy door plate, the aluminum alloy door plate comprising a frame and a door plate, the door plate being fixedly installed in the frame, the frame comprising an upper edge profile, a lower edge profile, a left edge profile and a right edge profile, the upper edge profile, the lower edge profile, the left edge profile and the right edge profile surrounding the frame, the door plate being assembled by a plurality of door plate profiles, the welding process for the aluminum alloy door plate comprising the following steps:

[0005] The door plate profiles are assembled into a door plate, and a weld seam is provided between adjacent door plate profiles;

[0006] The upper edge profile and the lower edge profile are respectively welded at the upper and lower ends of the door plate, and the left edge profile and the right edge profile are welded with the upper edge profile and the lower edge profile to form the frame;

[0007] The left edge profile and the right edge profile are respectively welded at the left and right sides of the door plate;

[0008] The door plate profiles are welded and fixed along the weld seam, and the welding is completed.

[0009] In an embodiment, when the upper and lower edge profiles are welded to the upper and lower ends of the door panel respectively, the welding process is laser welding, the welding power is 1150W-1250W, the scanning width is 2mm-3mm, the wire feeding speed is 55mm / s-65mm / s, and the gas flow is 8L / min-12L / min.

[0010] In an embodiment, when the left and right edge profiles are welded to the upper and lower edge profiles to form a frame, the welding process is laser welding, the welding power is 1150W-1250W, the scanning width is 2mm-3mm, the wire feeding speed is 65mm / s-75mm / s, and the gas flow is 8L / min-12L / min.

[0011] In an embodiment, when the left and right edge profiles are welded to the left and right sides of the door panel respectively, the welding process is laser welding, the welding power is 850W-950W, the scanning width is 2.1mm-3.5mm, the wire feeding speed is 65mm / s-75mm / s, and the gas flow is 8L / min-12L / min.

[0012] In an embodiment, when the left and right edge profiles are welded to the left and right sides of the door panel respectively, the welding mode is intermittent welding.

[0013] In an embodiment, when the door panel profiles are welded along the weld seam, the welding process is laser welding, the welding power is 950W-1050W, the scanning width is 2mm-3mm, the wire feeding speed is 65mm / s-75mm / s, and the gas flow is 8L / min-12L / min.

[0014] In an embodiment, when the door panel profiles are welded along the weld seam, the welding process is intermittent welding.

[0015] In an embodiment, the welding direction when the upper edge profile is welded to the upper end of the door panel is consistent with the welding direction when the lower edge profile is welded to the lower end of the door panel.

[0016] In an embodiment, the welding direction when the left edge profile is welded to the left side of the door panel is consistent with the welding direction when the right edge profile is welded to the right side of the door panel.

[0017] In an embodiment, the welding direction when the door panel profiles are welded is consistent with the welding direction when the left edge profile is welded to the left side of the door panel or the welding direction when the right edge profile is welded to the right side of the door panel.

[0018] The implementation of the present application has the following beneficial effects:

[0019] The welding process of the aluminum alloy door plate provided by the present application first welds the upper and lower edge profiles on the upper and lower ends of the door plate, respectively, and then welds the left and right edge profiles with the upper and lower edge profiles to form a frame; then the left and right edge profiles are welded on the left and right sides of the door plate, respectively; finally, the door plate profiles are welded and fixed along the welds, and the welding is completed. The present application adopts a specific welding sequence to control the welding deformation, and at the same time, it is matched with the laser welding process and specific welding parameters, which can eliminate the pre-welding deformation process and post-welding shaping process, significantly improve the production efficiency, reduce the labor intensity of welding process and manual labor, and reduce the production cost. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The structure diagram of the aluminum alloy door plate provided by the present application is shown. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below.

[0022] Unless otherwise stated or contradictory, the terms or phrases used in this paper have the following meanings:

[0023] In the present application, "preferably" is only to describe the better effect of the embodiment or example, and it should be understood that it does not constitute a limitation on the protection scope of the present application.

[0024] In the present application, the technical features described in an open way include both the closed technical scheme consisting of the listed features and the open technical scheme containing the listed features.

[0025] In the present application, if there is no special description, the numerical interval includes both endpoints of the numerical interval.

[0026] The present application provides a welding process of an aluminum alloy door plate, as shown in Figure 1 The aluminum alloy door plate includes a frame and a door plate, the door plate is fixedly installed in the frame, the frame includes an upper edge profile 1, a lower edge profile 2, a left edge profile 3 and a right edge profile 4, the upper edge profile 1, the lower edge profile 2, the left edge profile 3 and the right edge profile 4 form the frame, the door plate is spliced by a plurality of door plate profiles 5, and the aluminum alloy door plate welding process includes the following steps:

[0027] The door plate profiles 5 are spliced into a door plate, and a weld 6 is arranged between adjacent door plate profiles 5;

[0028] Welding the upper and lower edge profiles 1 and 2 on the upper and lower ends of the door plate respectively, and then welding the left and right edge profiles 3 and 4 with the upper and lower edge profiles 1 and 2 to form a frame;

[0029] Welding the left and right edge profiles 3 and 4 on the left and right sides of the door plate respectively;

[0030] Welding and fixing the door plate profile 5 along the weld 6 to complete the welding.

[0031] The welding process of the aluminum alloy door plate provided by the application adopts a specific welding sequence to control welding deformation, and is matched with a laser welding process and specific welding parameters, so that the pre-welding deformation process and the post-welding shaping process can be omitted, the production efficiency is obviously improved, the welding process and the labor intensity of workers are reduced, and the production cost is reduced.

[0032] In an embodiment, when the upper and lower edge profiles 1 and 2 are welded on the upper and lower ends of the door plate respectively, the welding process is laser welding, the welding power is 1150W-1250W, the scanning width is 2mm-3mm, the wire feeding speed is 55mm / s-65mm / s, and the gas flow is 8L / min-12L / min. Preferably, the welding power is 1180W-1210W, the scanning width is 2.2mm-2.8mm, the wire feeding speed is 58mm / s-62mm / s, and the gas flow is 9L / min-11L / min.

[0033] In an embodiment, when the left and right edge profiles 3 and 4 are welded with the upper and lower edge profiles 1 and 2 to form a frame, the welding process is laser welding, the welding power is 1150W-1250W, the scanning width is 2mm-3mm, the wire feeding speed is 65mm / s-75mm / s, and the gas flow is 8L / min-12L / min. Preferably, the welding power is 1180W-1210W, the scanning width is 2.2mm-2.8mm, the wire feeding speed is 68mm / s-72mm / s, and the gas flow is 9L / min-11L / min.

[0034] In an embodiment, when the left and right edge profiles 3 and 4 are welded on the left and right sides of the door plate respectively, the welding process is laser welding, the welding power is 850W-950W, the scanning width is 2.1mm-3.5mm, the wire feeding speed is 65mm / s-75mm / s, and the gas flow is 8L / min-12L / min. Preferably, the welding power is 880W-910W, the scanning width is 2.4mm-2.9mm, the wire feeding speed is 68mm / s-72mm / s, and the gas flow is 9L / min-11L / min.

[0035] In an embodiment, when the left and right side profiles 3 and 4 are welded to the left and right sides of the door panel respectively, the welding is intermittent welding. Intermittent welding is a welding method in which the weld is discontinuous during welding, which is used for non-critical connections with long welds that do not require full penetration welding, or to reduce welding distortion and provide space for welding distortion. Intermittent welding simplifies the process flow, eliminates the process of marking and pre-welding inspection, and improves production efficiency while ensuring welding quality.

[0036] In an embodiment, when the door panel profile 5 is welded along the weld 6, the welding process is laser welding, the welding power is 950W-1050W, the scanning width is 2mm-3mm, the wire feeding speed is 65mm / s-75mm / s, and the gas flow is 8L / min-12L / min. Preferably, the welding power is 980W-1010W, the scanning width is 2.2mm-2.8mm, the wire feeding speed is 68mm / s-72mm / s, and the gas flow is 9L / min-11L / min.

[0037] In an embodiment, when the door panel profile 5 is welded along the weld 6, the welding process is intermittent welding. Intermittent welding is a welding method in which the weld is discontinuous during welding, which is used for non-critical connections with long welds that do not require full penetration welding, or to reduce welding distortion and provide space for welding distortion. Intermittent welding simplifies the process flow, eliminates the process of marking and pre-welding inspection, and improves production efficiency while ensuring welding quality.

[0038] It should be noted that in the prior art, the door panel is welded by manual MIG welding process. Due to the thin material, the welding process is slow, the heat input is large, the heat affected zone range is large, the heat generated cannot be quickly dissipated, resulting in large shrinkage deformation of the door panel after welding. The present application replaces the existing manual MIG process with laser welding process, and under the above specific welding parameters, not only can the operation be simpler, but also the heat affected zone range is small, which ensures the performance of the weld under the premise of ensuring the performance of the weld, controls the welding shrinkage deformation, that is, ensures the product quality. And the practicality of the above welding process is strong, reduces the labor intensity of manual labor, improves the production efficiency, and saves the production cost.

[0039] Further, the welding sequence has certain influence on the welding deformation. When the welding sequence is clockwise or counterclockwise, due to the characteristics of the door plate profile structure and the welding heat cycle, the heat at the end of the door plate weld is large, resulting in large shrinkage deformation at the end. In an embodiment, the welding direction when the upper edge profile 1 is welded with the upper end of the door plate is consistent with the welding direction when the lower edge profile 2 is welded with the lower end of the door plate. In an embodiment, the welding direction when the left edge profile 3 is welded with the left side of the door plate is consistent with the welding direction when the right edge profile 4 is welded with the right side of the door plate. In an embodiment, the welding direction when the door plate profiles 5 are welded is consistent with the welding direction when the left edge profile 3 is welded with the left side of the door plate or the welding direction when the right edge profile 4 is welded with the right side of the door plate. The above welding direction is combined with the fast welding speed of laser welding, so that the heat affected zone of the base material is small, the heat around the weld dissipates quickly, and the welding deformation can be controlled without applying the anti-deformation state of the tooling, and the post-weld shaping process is saved, thereby improving the production efficiency and controlling the product quality.

[0040] The following will be further described with reference to the embodiments:

[0041] Embodiment 1

[0042] The embodiment provides a welding process of an aluminum alloy door plate, the aluminum alloy door plate comprising a frame and a door plate, the door plate being fixedly installed in the frame, the frame comprising an upper edge profile, a lower edge profile, a left edge profile and a right edge profile, the upper edge profile, the lower edge profile, the left edge profile and the right edge profile surrounding the frame, the door plate being spliced by a plurality of door plate profiles, and the aluminum alloy door plate welding process comprising the following steps:

[0043] The door plate profiles are spliced into a door plate, and a weld is arranged between adjacent door plate profiles.

[0044] The upper edge profile and the lower edge profile are respectively welded at the upper end and the lower end of the door plate, and the welding process adopted is laser welding, the welding power is 1200 W, the scanning width is 2.5 mm, the wire feeding speed is 60 mm / s, and the gas flow is 10 L / min.

[0045] The left edge profile and the right edge profile are further welded with the upper edge profile and the lower edge profile to form the frame, and the welding process adopted is laser welding, the welding power is 1200 W, the scanning width is 2.5 mm, the wire feeding speed is 70 mm / s, and the gas flow is 10 L / min.

[0046] Then the left and right side profiles are welded on the left and right sides of the door panel respectively, and the welding process is laser welding, the welding power is 900W, the scanning width is 2.5mm, the wire feeding speed is 70mm / s, and the gas flow is 10L / min.

[0047] Finally, the door panel profile is welded and fixed along the weld, and the welding is completed, and the welding process is laser welding, the welding power is 1000W, the scanning width is 2.5mm, the wire feeding speed is 70mm / s, and the gas flow is 10L / min.

[0048] In the above welding process, the welding direction when the upper side profile is welded with the upper end of the door panel is consistent with the welding direction when the lower side profile is welded with the lower end of the door panel. The welding direction when the left side profile is welded with the left side of the door panel is consistent with the welding direction when the right side profile is welded with the right side of the door panel. The welding direction when the door panel profiles are welded is consistent with the welding direction when the left side profile is welded with the left side of the door panel or the welding direction when the right side profile is welded with the right side of the door panel.

[0049] Example 2

[0050] The embodiment provides a welding process of an aluminum alloy door panel, which is different from example 1 in that: when the upper side profile and the lower side profile are welded on the upper and lower ends of the door panel respectively, the welding process is laser welding, the welding power is 1250W, the scanning width is 3mm, the wire feeding speed is 65mm / s, and the gas flow is 12L / min. The rest is the same as example 1.

[0051] Example 3

[0052] The embodiment provides a welding process of an aluminum alloy door panel, which is different from example 1 in that: when the left side profile and the right side profile are welded with the upper side profile and the lower side profile to form a frame, the welding process is laser welding, the welding power is 1180W, the scanning width is 2.2mm, the wire feeding speed is 73mm / s, and the gas flow is 11L / min. The rest is the same as example 1.

[0053] Comparative Example 1

[0054] The comparative example provides a welding process of an aluminum alloy door panel, which comprises the following steps:

[0055] The door panel profile is spliced into a door panel, and the adjacent door panel profiles are provided with a weld and are welded and fixed along the weld to obtain a door panel, and the welding process is laser welding, the welding power is 800W, the scanning width is 2.5mm, the wire feeding speed is 70mm / s, and the gas flow is 10L / min.

[0056] The left and right profiles are welded with the upper and lower profiles to form a frame, and the welding process is laser welding, the welding power is 1300W, the scanning width is 2.5mm, the wire feeding speed is 70mm / s, and the gas flow is 10L / min.

[0057] The frame is welded with the door plate in a clockwise welding sequence, and the welding process is laser welding, the welding power is 1300W, the scanning width is 2.5mm, the wire feeding speed is 60mm / s, and the gas flow is 10L / min.

[0058] The appearance test of the aluminum alloy door plate welded in Example 1-Example 3 and Comparative Example 1 is carried out, and the related test results are shown in Table 1. Among them, the bending degree test method is: using a 300mm long ruler along the length direction of the profile, the maximum gap is measured by using a feeler gauge, and the measured value is the bending degree value.

[0059] Table 1 is the test results of the aluminum alloy door plate welded in Example 1-Example 3 and Comparative Example 1

[0060]

[0061] From the data in Table 1, it can be seen that the welding process of the aluminum alloy door plate provided by the present application adopts a specific welding sequence to control the welding deformation, and at the same time, the laser welding process and the specific welding parameters are matched, which can maintain good appearance performance of the finished product without the need for pre-welding fixture to apply the reverse deformation process and post-welding shaping process, and the product consistency is high, which obviously improves the production efficiency of the aluminum alloy door plate, reduces the labor intensity of the welding process and manual labor, and reduces the production cost.

[0062] The above is the preferred embodiment of the application, it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, can make a number of improvements and refinements, these improvements and refinements also as the protection scope of the present application.

Claims

1. A welding process for an aluminum alloy door panel, characterized by, The aluminum alloy door plate comprises a frame and a door plate fixedly installed in the frame, the frame comprises an upper edge profile, a lower edge profile, a left edge profile and a right edge profile, the upper edge profile, the lower edge profile, the left edge profile and the right edge profile surround the frame, the door plate is spliced by a plurality of door plate profiles, and the aluminum alloy door plate welding process comprises the following steps: The door plate profiles are spliced into a door plate, and a weld is arranged between adjacent door plate profiles; The upper edge profile and the lower edge profile are respectively welded at the upper and lower ends of the door plate, and then the left edge profile and the right edge profile are welded with the upper edge profile and the lower edge profile to form a frame; The left edge profile and the right edge profile are respectively welded at the left and right sides of the door plate; The door plate profiles are welded and fixed along the weld, and the welding is completed; When the upper edge profile and the lower edge profile are respectively welded at the upper and lower ends of the door plate, the welding process is laser welding, the welding power is 1150W-1250W, the scanning width is 2mm-3mm, the wire feeding speed is 55mm / s-65mm / s, and the gas flow is 8L / min-12L / min When the left edge profile and the right edge profile are welded with the upper edge profile and the lower edge profile to form a frame, the welding process is laser welding, the welding power is 1150W-1250W, the scanning width is 2mm-3mm, the wire feeding speed is 65mm / s-75mm / s, and the gas flow is 8L / min-12L / min; When the left edge profile and the right edge profile are respectively welded at the left and right sides of the door plate, the welding process is laser welding, the welding power is 850W-950W, the scanning width is 2.1mm-3.5mm, the wire feeding speed is 65mm / s-75mm / s, and the gas flow is 8L / min-12L / min; When the door plate profiles are welded and fixed along the weld, the welding process is laser welding, the welding power is 950W-1050W, the scanning width is 2mm-3mm, the wire feeding speed is 65mm / s-75mm / s, and the gas flow is 8L / min-12L / min.

2. The welding process of the aluminum alloy door panel of claim 1, wherein, When the left edge profile and the right edge profile are respectively welded at the left and right sides of the door plate, the welding mode is intermittent welding.

3. The welding process of the aluminum alloy door panel of claim 1, wherein, When the door plate profiles are welded and fixed along the weld, the welding process is intermittent welding.

4. The welding process of the aluminum alloy door panel of claim 1, wherein, The welding direction when the upper edge profile is welded with the upper end of the door plate is consistent with the welding direction when the lower edge profile is welded with the lower end of the door plate.

5. The welding process of the aluminum alloy door panel of claim 1, wherein, The welding direction when the left edge profile is welded with the left side of the door plate is consistent with the welding direction when the right edge profile is welded with the right side of the door plate.

6. The welding process of the aluminum alloy door panel of claim 1, wherein, The welding direction when the door plate profiles are welded is consistent with the welding direction when the left edge profile is welded with the left side of the door plate or the welding direction when the right edge profile is welded with the right side of the door plate.

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