Sealing welding vacuum lock chamber cover plate structure
By cutting at the bottom plate angle of the vacuum lock chamber cover plate and forming a chamfered welding part, combined with the multi-layer weld bead design, the problem of cracks and air leakage in the weld is solved, and a high sealing and high-strength welding structure is achieved, and the quality and reliability of the vacuum chamber are improved.
Patent Information
- Application Number
- CN202422540682.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-21
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2034-10-21
AI Technical Summary
The welds of the vacuum lock chamber cover plate are prone to small cracks and air leakage, which affects the quality and reliability of the vacuum chamber. Especially the welds between the four corners of the bottom plate and the side plate frame are prone to problems.
Cutting is performed on two sides of each corner of the bottom plate to form a cutting surface, and a chamfered welding part is formed with the side plate frame. It is welded through a multi-layer continuous airtight welding bead, including the first weld bead, the second weld bead, the third weld bead, the fourth weld bead and the fifth weld bead. The combination of argon gas protective welding and carbon dioxide protective welding is adopted to ensure the airtightness and force strength of the weld bead.
The force strength at the welding point is improved, the probability of air leakage in the weld is reduced, the sealing and reliability of the vacuum chamber are ensured, and the waste of weld material is reduced.
Smart Images
Figure CN223250839U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of vacuum lock chamber cover plate processing, in particular to a sealed welded vacuum lock chamber cover plate structure. Background Art
[0002] The production line's beat requires that the vacuum lock chamber be evacuated quickly. The smaller the vacuum chamber, the faster the evacuation speed. In order to reduce volume, the end cover of the vacuum chamber generally adopts a sunken cover structure design. This cover structure is welded together by the cover frame, side frame, bottom plate, etc., which will produce multiple vacuum airtight welds. These welds must not only ensure vacuum airtightness, but also withstand the welding tensile strength during repeated inflation and degassing of the vacuum chamber to reduce the deformation of the vacuum chamber cover and reduce the risk of cracks and leaks caused by repeated deformation fatigue. Since the four corners of the bottom plate are subject to relatively concentrated stress, the welds between the four corners of the bottom plate and the side frame will often quickly develop small cracks, resulting in weld leakage, affecting the quality of the vacuum lock chamber. Utility Model Content
[0003] The purpose of the present invention is to provide a sealed and welded vacuum lock chamber cover structure to solve at least one aspect of the problems and defects raised in the above background technology.
[0004] A sealed welded vacuum lock chamber cover structure includes a cover frame, a side plate frame welded to the inner frame of the cover frame, a bottom plate welded to the inner frame of the side plate frame, two edges of each corner of the bottom plate are cut to form a cutting surface, the cutting surface and the side plate frame form a chamfered weld portion, a first weld bead, a second weld bead and a third weld bead are sequentially formed in the chamfered weld portion by welding, a fourth weld bead is formed between the third weld bead and the side plate frame, and a fifth weld bead is formed between the fourth weld bead and the bottom plate, and all weld beads are continuous airtight welds.
[0005] The length of the cutting surface shall not be less than 100 mm and not more than 500 mm.
[0006] The angle of the chamfered welding portion is less than 90 degrees and greater than 30 degrees.
[0007] The first weld bead is formed by argon gas shielded welding.
[0008] The second weld bead, the third weld bead, the fourth weld bead and the fifth weld bead are formed by carbon dioxide shielded welding.
[0009] The order of weld bead thickness from largest to smallest is: first weld bead, second weld bead, third weld bead, fourth weld bead, and fifth weld bead.
[0010] The thickness of the first weld bead, the second weld bead, the third weld bead, the fourth weld bead and the fifth weld bead is not less than 3 mm and not more than 5 mm.
[0011] Compared with the prior art, the beneficial effects of the present invention are:
[0012] This solution cuts the two edges of each corner of the base plate, and the cut surface and the side plate frame form a chamfered weld portion after cutting. Welding is performed on the chamfered weld portion to form a first weld bead, a second weld bead, and a third weld bead in sequence. A fourth weld bead is formed between the third weld bead and the side plate frame by welding, and a fifth weld bead is formed between the fourth weld bead and the base plate by welding. All weld beads are continuous airtight weld beads. Through this structural design, while ensuring airtightness, the stress strength can be improved, and the probability of the base plate corner weld cracking due to stress, resulting in weld leakage, is reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] In order to facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.
[0014] Figure 1 This is a schematic diagram of the overall structure of the utility model;
[0015] Figure 2 This is a schematic diagram of the top view of the bottom plate of the utility model;
[0016] Figure 3 It is a schematic cross-sectional structural diagram of the cover frame, side panels and bottom panel in the present invention.
[0017] In the figure: 1, cover plate frame; 2, side plate frame; 3, bottom plate; 301, chamfered weld; 4, first weld bead; 5, second weld bead; 6, third weld bead; 7, fourth weld bead; 8, fifth weld bead. DETAILED DESCRIPTION
[0018] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for the purpose of explaining the present invention and are not intended to limit the present invention. That is, the embodiments described herein are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein can be arranged and designed in a variety of different configurations.
[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.
[0020] See also Figure 1-3As shown, in an embodiment of the present invention, a sealed welded vacuum lock chamber cover structure includes a cover frame 1, a side plate frame 2 is welded to the inner frame of the cover frame 1, a bottom plate 3 is welded to the inner frame of the side plate frame 2, and the two sides of each corner of the bottom plate 3 are cut to form a cutting surface, and the cutting surface and the side plate frame 2 form a chamfered weld portion 301, and the chamfered weld portion 301 is sequentially formed with a first weld bead 4, a second weld bead 5 and a third weld bead 6 by welding, a fourth weld bead 7 is formed between the third weld bead 6 and the side plate frame 2, and a fifth weld bead 8 is formed between the fourth weld bead 7 and the bottom plate 3, and all welds are continuous airtight welds. This solution can provide sufficient welding space through the processed and formed chamfered welded portion 301, and form a special connection structure through multiple welds. This structure can fully improve the stress strength of the weld while ensuring the sealing performance, thereby reducing the probability of the weld cracking due to stress at the weld between the corner of the bottom plate 3 and the side plate frame 2, thereby reducing the probability of the quality of the vacuum chamber being affected by weld leakage.
[0021] Furthermore, the length of the cutting surface ranges from 100 to 500 mm. The length of the cutting surface is related to the area of the chamfered and welded portion 301. If it is less than 100 mm, the welding area of the chamfered and welded portion 301 cannot ensure the stress strength. If the strength is insufficient, it is easy to cause the welds at the corners of the bottom plate 3 to crack and leak, thereby affecting the quality of the vacuum chamber. If it is higher than 500 mm, the chamfered and welded portion 301 is easy to exceed the required welding area, thereby causing waste. The set length of the cutting surface of 100 to 500 mm can reduce the loss of welding materials while ensuring the stress strength.
[0022] Furthermore, the angle of the chamfered weld portion 301 should be less than 90 degrees and greater than 30 degrees, and can be fine-tuned within the range according to actual conditions. Since the chamfered weld portion 301 is a stress concentration portion, the weld is concentrated in the chamfered weld portion 301. This processing angle is related to the stress strength of the chamfered weld portion 301. Setting the angle within this range can make the weld more concentrated, thereby increasing the stress strength and reducing the consumption of welding materials.
[0023] Furthermore, the first weld bead 4 is a bottom weld bead, which has the highest air tightness requirement, so it is formed by argon gas shielded welding to improve the air tightness of the bottom layer of the chamfered weld portion 301.
[0024] Furthermore, the second weld bead 5, the third weld bead 6, the fourth weld bead 7 and the fifth weld bead 8 are reinforced welds, and the stress strength requirement is higher than the air tightness requirement. Therefore, they are formed by carbon dioxide shielded welding, which reduces welding costs and improves welding efficiency while ensuring stress strength.
[0025] Furthermore, the thickness of the welds from large to small is: first weld bead 4, second weld bead 5, third weld bead 6, fourth weld bead 7, and fifth weld bead 8. The multi-layer welds from thick to thin can make the weld metal experience a more uniform temperature gradient during the solidification process, which helps to obtain a finer grain structure. A fine grain structure usually has higher strength and toughness, thereby improving the overall quality of the weld and reducing welding costs.
[0026] Furthermore, the thickness of the first weld bead 4, the second weld bead 5, the third weld bead 6, the fourth weld bead 7 and the fifth weld bead 8 is not less than 3 mm and not more than 5 mm. A weld bead thickness that is too small affects the weld strength, and a weld bead thickness that is too large increases the cost. This thickness range can reduce the waste of welding resources while ensuring the stress strength and air tightness of the weld.
[0027] The above content is merely an example and explanation of the structure of the present utility model. Technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, they should all fall within the scope of protection of the present utility model.
Claims
1. A sealed welded vacuum lock chamber cover structure, characterized in that: The invention comprises a cover plate frame (1), wherein the inner frame of the cover plate frame (1) is welded with a side plate frame (2), and the inner frame of the side plate frame (2) is welded with a bottom plate (3), and both sides of each corner of the bottom plate (3) are cut to form a cutting surface, and the cutting surface and the side plate frame (2) form a chamfered welding portion (301), and a first weld bead (4), a second weld bead (5) and a third weld bead (6) are sequentially formed in the chamfered welding portion (301) by welding, a fourth weld bead (7) is formed between the third weld bead (6) and the side plate frame (2), and a fifth weld bead (8) is formed between the fourth weld bead (7) and the bottom plate (3), and all weld beads are continuous airtight weld beads.
2. A sealed welded vacuum lock chamber cover structure according to claim 1, characterized in that: The length of the cutting surface shall not be less than 100 mm and not more than 500 mm.
3. The sealed welded vacuum lock chamber cover structure according to claim 1, characterized in that: The angle of the chamfered welding portion (301) is less than 90 degrees and greater than 30 degrees.
4. The sealed welded vacuum lock chamber cover structure according to claim 1, characterized in that: The first weld bead (4) is formed by argon gas shielded welding.
5. The sealed welded vacuum lock chamber cover structure according to claim 1, characterized in that: The second weld bead (5), the third weld bead (6), the fourth weld bead (7) and the fifth weld bead (8) are formed by carbon dioxide shielded welding.
6. The sealed welded vacuum lock chamber cover structure according to claim 1, characterized in that: The thickness of the welds is in descending order: the first weld (4), the second weld (5), the third weld (6), the fourth weld (7), and the fifth weld (8).
7. The sealed welded vacuum lock chamber cover structure according to claim 6, characterized in that: The thickness of the first weld bead (4), the second weld bead (5), the third weld bead (6), the fourth weld bead (7), and the fifth weld bead (8) is not less than 3 mm and not more than 5 mm.