Uncovering and reworking method for airtight packaging tube shell with reusable cover plate

Abstract

The invention relates to an uncovering reworking method for an airtight packaging tube shell capable of repeatedly utilizing a cover plate, which comprises the following steps of: 1, carrying out laser cutting on a welding seam area on the surface of the cover plate, separating the cover plate from a box body when the cutting depth exceeds the welding seam depth, and taking down the cover plate to finish uncovering; 2, cutting dust on the surfaces of the cover plate and the box body is mechanically removed, and the cover plate and the box body are secondarily assembled; and thirdly, the cover plate is repeatedly used for secondary cover plate assembly, welding seam seal welding of a large assembly gap of the box body cover plate is completed in an out-of-focus laser seal welding mode, and airtight packaging is achieved. The method has the advantages that the uncovering machining mode is laser cutting, the process stress is smaller than the milling machining stress, and cutter breaking, cutter sticking, tube shell side wall cracking and the like are avoided; the operation is simple, the box body and the cover plate cannot be damaged, an internal circuit cannot be damaged, the cover plate can be repeatedly used and subjected to secondary seal welding, and the material cost is reduced, and the seal welding adopts an out-of-focus laser seal welding process, so that airtight packaging of a large assembly gap welding seam with the width of 0.2 mm of the box body and the cover plate is realized.

Description

Technical Field

[0001] The invention discloses a cover opening and reworking method for a tube shell with a reusable cover plate and belongs to the technical field of microwave component airtight packaging. Background Art

[0002] In order to protect components and packaging materials from external environmental corrosion and mechanical damage and to ensure the internal atmosphere of the sealed cavity, the microwave assembly uses a laser sealing process to weld the metal tube shell. When a failure occurs inside the microwave assembly, it is necessary to rework and open the cover for repair and perform airtight sealing again.

[0003] The commonly used method for opening the cover of the microwave component packaging tube shell is vertical milling of the milling cutter. Specifically, the center trajectory of the milling cutter is offset inward from the center trajectory of the weld, and the high-speed rotating milling cutter moves in the direction of the weld, feeding downward layer by layer from the surface of the cover plate, milling to remove part of the weld of the cover plate, and separating the cover plate from the cover plate. The cover plate cannot be used any more due to milling damage, and the cover plate needs to be customized again for secondary sealing. Summary of the invention

[0004] The present invention proposes a method for opening and reworking an airtight packaging tube shell with a reusable cover plate. The purpose is to provide a method for opening and reworking an airtight packaging tube shell with a reusable cover plate to address the defects of the prior art. The method can reuse the cover plate, reduce material costs, and achieve a high success rate of airtight packaging rework method.

[0005] The technical solution of the present invention is a method for reworking a cover-opened airtight package tube shell with a reusable cover plate, wherein the airtight package tube shell comprises a cover plate and a box body, and comprises the following steps: Step 1: Perform laser cutting on the weld area on the cover surface. When the cutting depth exceeds the weld depth, the cover is separated from the box body, and the cover is removed to complete the opening. Step 2: Mechanically remove the cutting dust on the surface of the cover plate and the box body, and reassemble the cover plate and the box body; Step 3: Re-assemble the cover plate and reuse the cover plate for laser sealing again to complete the airtight packaging.

[0006] In the step 1, a precision laser cutting device is used to fix the tube shell under the laser head of the laser cutting device through a tooling, and the surface of the tube shell cover plate to be cut is placed horizontally to ensure that it is in the laser processing focal plane.

[0007] In the step 1, the cutting process uses multiple parallel processing line segments to cut the weld at the assembly gap position of the box cover, and the total width of the laser cutting is controlled to be no more than 0.2 mm.

[0008] In the step 1, cutting parameters are set in the laser cutting equipment software, and the cutting parameters include the laser cutting cover opening path, positioning method, laser power, number of processing times, and processing speed; the laser cutting step processing layer of successive negative defocus processing is increased so that the laser cutting depth reaches the weld depth.

[0009] In the step 1, the capping program is executed in the laser cutting system equipment software; the capping program is loaded, the laser head or platform is adjusted, and the product weld surface is adjusted to the laser cutting focal plane; the capping processing operation is performed, and the positioning and laser cutting operations are completed in sequence.

[0010] In the step 1, after the laser cutting is completed, the cover plate is removed from the tube shell by using a suction cup to absorb the cover plate or by using an adhesive tape to adhere the cover plate.

[0011] In the step 2, a wire brush is used to lightly brush the laser-cut facade area of ​​the box body and the cover plate to remove movable cutting dust, and an air gun is used to blow away the remaining dust and excess materials.

[0012] In the step 2, the cover plate and the box body are assembled for secondary adaptation, the assembly gap in the laser cutting area is required to be less than 0.2 mm, and other structures are consistent with the initial sealing requirements of the cover plate and the box body.

[0013] In the step three, the box cover is fixed by using a tool, and the cover is fixed by laser spot welding at multiple points in the center area of ​​the circumferential weld, and the tool is removed.

[0014] In the step three, the box body cover is sealed for the second time, the laser focal plane is defocused, and the laser moves along the central gap of the cover box body to form a continuous circumferential weld, completing the laser sealing of the 0.2mm wide box body cover large assembly gap weld to achieve airtight packaging.

[0015] Beneficial effects of the present invention: 1) The cover opening process is laser cutting, and the process stress is less than the milling stress of the milling cutter. Problems such as cutter breakage, cutter sticking, and tube shell side wall rupture in the milling cover opening process will not occur.

[0016] 2) This method is easy to operate, will not cause damage to the cover plate and the cover plate, will not cause damage to the internal circuit, and the cover plate can be reused and sealed for the second time, reducing material costs.

[0017] 3) The sealing process uses a defocused laser sealing process to achieve airtight packaging of the box cover with a large assembly gap of 0.2mm width. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Attached Figure 1 It is an overall schematic diagram of opening the reusable cover.

[0019] Attached Figure 2It is a cross-sectional schematic diagram of the reusable cover plate when it is opened. DETAILED DESCRIPTION

[0020] A method for opening and reworking a reusable cover plate airtight package tube shell, the airtight package tube shell comprising: an AlSi cover plate and an AlSi box body, or an Al cover plate and an Al box body. The opening method uses a high-energy laser beam to cut the laser sealing weld seam to cut and separate the connection area between the cover plate and the box body. The reusable cover plate is a cover plate that is reassembled using the opening method, and the airtight laser sealing is completed again.

[0021] The steps of decapping and reworking are as follows: Step 1: Laser cut the weld area on the cover surface. When the cutting depth exceeds the weld depth, the cover is separated from the box body. Use a suction cup or tape to remove the cover to complete the opening. Step 2: Mechanically remove the cutting dust on the surface of the cover plate and the box body, and reassemble the cover plate and the box body; Step three: reassemble the cover plate and reuse the cover plate for laser sealing again to complete the airtight packaging.

[0022] In step one, the tube shell is fixed under the laser head of the laser cutting equipment through a tooling, and the surface of the tube shell cover to be cut is placed horizontally to ensure that it is in the focal plane of the laser processing.

[0023] In step one, a laser cutting system is used, and the cutting process uses multiple cutting lines in parallel to control the total laser cutting width to not exceed 0.2 mm.

[0024] In step 1, set the laser cutting cover opening path, positioning method, laser power, processing times, processing speed and other parameters in the laser cutting system equipment software. Add laser cutting step processing layers with successive negative defocus processing to make the laser cutting depth reach the weld depth.

[0025] In step 1, execute the capping program in the laser cutting system equipment software. Load the capping program, adjust the laser head or platform, and adjust the product weld surface to the laser cutting focus plane. Perform the capping processing operation and complete the positioning-laser cutting operation in sequence.

[0026] In step 1, after the laser cutting is completed, the cover plate is removed from the tube shell by using a suction cup to absorb the cover plate or by using an adhesive tape to adhere the cover plate.

[0027] In step 2, use a wire brush to lightly brush the laser-cut facade area of ​​the box body and cover to remove movable cutting dust, and use an air gun to blow away the remaining dust and excess materials.

[0028] In step two, the cover plate and the box body are assembled for secondary adaptation. The assembly gap in the laser cutting area is required to be less than 0.2 mm, and the other structures are consistent with the initial welding requirements of the cover plate and the box body.

[0029] In step three, the box cover is fixed with a tool, the cover is fixed by laser spot welding at multiple points in the center area of ​​the circumferential weld, and the tool is removed.

[0030] In step three, the box cover is sealed for the second time. The laser focal plane is defocused and the laser moves along the center gap of the cover box to form a continuous circumferential weld. The laser sealing of the 0.2mm wide box cover large assembly gap weld is completed to achieve airtight packaging.

[0031] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0032] This embodiment provides a method for reworking an AlSi tube shell with a reusable cover plate. Take an AlSi hermetic package tube shell with a size of 50×50×8 mm as an example. Figure 1 , materials include AlSi material box body, cover plate and connector.

[0033] 1) The tube shell material is AlSi material, and the weld depth is 0.4 mm.

[0034] 2) Fix the tube shell under the laser head of the laser cutting equipment through the tooling, and place the surface of the tube shell cover to be cut horizontally to ensure that it is in the focal plane of the laser processing.

[0035] 3) Edit the cap opening drawing in the laser cutting equipment software. Obtain the shell feature graphics, cover plate contour and weld path according to the shell design drawing, adjust the number and position of the weld path processing line segments, design multiple line segments parallel to the weld path, set the total cutting width to no more than 0.2mm, and set the cap opening laser cutting path. Design the positioning method according to the shell cover plane feature graphics.

[0036] 4) Edit the cap opening program in the laser cutting system equipment software. Import the cap opening drawing, set the cap opening laser cutting path to the laser cutting line, and set the positioning method. According to the processing capacity of the laser cutting equipment, set the laser power, processing times, processing speed and other parameters. Add the laser cutting step processing layer of the successive negative defocus processing, and the laser cutting depth is 0.5mm, which exceeds the weld depth. Figure 2 .

[0037] 5) Execute the capping program in the laser cutting system equipment software. Load the capping program, adjust the laser head or platform, and adjust the product weld surface to the laser cutting focal plane. Execute the capping processing operation and complete the positioning-laser cutting operation in sequence.

[0038] 6) Wait for the laser cutting to be completed, and remove the cover from the tube shell by using a suction cup to absorb the cover or adhesive tape to adhere the cover.

[0039] 7) Use a wire brush to lightly brush the laser-cut facade area of ​​the box body and cover to remove cutting dust, and use an air gun to blow away remaining dust and other excess materials.

[0040] 8) Assemble the cover plate and the box body for secondary adaptation. The assembly gap in the laser cutting area is required to be less than 0.2mm, and the other structures are consistent with the initial sealing requirements of the cover plate and the box body.

[0041] 9) Use the tooling to fix the box cover, perform laser spot welding on multiple points in the center area of ​​the circumferential weld to fix the cover, and remove the tooling.

[0042] 10) The defocused welding process is used for secondary sealing. The laser focus plane is defocused, and the laser moves along the central gap of the cover box body to form a continuous circumferential weld to achieve an airtight connection between the box body and the cover.

Claims

1. A method for reworking a cover-opened airtight package tube shell with a reusable cover, wherein the airtight package tube shell comprises a cover plate and a box body, and is characterized in that The following steps are involved: Step 1: Perform laser cutting on the weld area on the cover surface. When the cutting depth exceeds the weld depth, the cover is separated from the box body, and the cover is removed to complete the opening. Step 2: Mechanically remove the cutting dust on the surface of the cover plate and the box body, and reassemble the cover plate and the box body; Step 3: Re-assemble the cover plate and reuse the cover plate for laser sealing again to complete the airtight packaging.

2. The method for reworking a tube shell by opening the cover of a reusable cover plate according to claim 1, characterized in that: In the step 1, a precision laser cutting device is used to fix the tube shell under the laser head of the laser cutting device through a tooling, and the surface of the tube shell cover plate to be cut is placed horizontally to ensure that it is in the laser processing focal plane.

3. The method for reworking a tube shell by opening a cover with a reusable cover plate according to claim 1, characterized in that: In the step 1, the cutting process uses multiple parallel processing line segments to cut the weld at the assembly gap position of the box cover, and the total width of the laser cutting is controlled to be no more than 0.2 mm.

4. The method for reworking a tube shell by opening a cover with a reusable cover plate according to claim 1, characterized in that: In the step 1, cutting parameters are set in the laser cutting equipment software, and the cutting parameters include the laser cutting cover opening path, positioning method, laser power, number of processing times, and processing speed; the laser cutting step processing layer of successive negative defocus processing is increased so that the laser cutting depth reaches the weld depth.

5. The method for reworking a tube shell with a reusable cover plate after opening the cover is characterized by: In the step 1, the capping program is executed in the laser cutting system equipment software; the capping program is loaded, the laser head or platform is adjusted, and the product weld surface is adjusted to the laser cutting focal plane; the capping processing operation is performed, and the positioning and laser cutting operations are completed in sequence.

6. The method for reworking a tube shell with a reusable cover plate after opening the cover is characterized by: In the step 1, after the laser cutting is completed, the cover plate is removed from the tube shell by using a suction cup to absorb the cover plate or a tape to adhere the cover plate.

7. The method for reworking a tube shell with a reusable cover plate after opening the cover is characterized by: In the step 2, a wire brush is used to lightly brush the laser-cut facade area of ​​the box body and the cover plate to remove movable cutting dust, and an air gun is used to blow away the remaining dust and excess materials.

8. The method for reworking a tube shell with a reusable cover plate after opening the cover is characterized by: In the step 2, the cover plate and the box body are assembled for secondary adaptation, the assembly gap in the laser cutting area is required to be less than 0.2 mm, and other structures are consistent with the initial sealing requirements of the cover plate and the box body.

9. The method for reworking a tube shell with a reusable cover plate after opening the cover is characterized by: In the step three, the box cover is fixed by using a tool, and the cover is fixed by laser spot welding at multiple points in the center area of ​​the circumferential weld, and the tool is removed.

10. The method for reworking a tube shell with a reusable cover plate after opening the cover is described in claim 1, wherein: In the step three, the box body cover is sealed for the second time, the laser focal plane is defocused, and the laser moves along the central gap of the cover box body to form a continuous circumferential weld, completing the laser sealing of the 0.2mm wide box body cover large assembly gap weld to achieve airtight packaging.

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