Process for sealing connection of a volute and range hood volute

Abstract

The application discloses a kind of volute sealing connection process method and range hood volute, by bonding mode the surface of volute ring wall, volute front cover and volute rear cover to be bonded is bonded together, then again through welding mode volute front cover and volute rear cover are welded in volute ring wall and form volute assembly, it further includes the following steps: S1, before volute front cover and volute rear cover are bonded on volute ring wall, the surface of volute ring wall, volute front cover and volute rear cover to be bonded is removed;S2, before volute front cover and volute rear cover are bonded on volute ring wall, glue is applied and reserved welding space after gluing at the bonding place of volute ring wall and volute front cover and the bonding place of volute ring wall and volute rear cover, volute front cover and volute rear cover after gluing are respectively attached to the two sides of volute ring wall;S3, by galvanometer laser welding, the welding place of volute ring wall and volute front cover and the welding place of volute ring wall and volute rear cover are welded.

Description

Technical Field

[0001] This invention specifically relates to a volute sealing connection process and a volute for a range hood. Background Technology

[0002] As range hoods are used over time, a layer of grease easily accumulates on the surfaces of parts such as the volute and impeller. This grease can affect the normal operation of the range hood's power system, ultimately leading to a decrease in smoke extraction efficiency. Furthermore, the continuous accumulation of grease inside the range hood can cause unpleasant odors and bacterial growth in the kitchen, affecting the user's health and reducing the enjoyment of cooking. To address these issues, self-cleaning technology can be used to remove the grease from the inside of the range hood. This technology uses high-temperature steam and water to rinse the volute and impeller. During the rinsing process, the grease adhering to the volute and impeller is continuously shed, achieving a cleaning effect.

[0003] However, the welding process of range hood volutes requires the presence of weld seams, which can lead to excess moisture remaining in the narrow seams formed after the volutes are self-cleaned. These narrow seams are prone to rusting under the erosion of water and oil. Since the volutes are located inside the range hoods, rust is not easily detected. Rusting can affect the range hood's smoke extraction effect, or even cause the entire volutes to fall off, leading to safety accidents.

[0004] Therefore, to address the above shortcomings, a new volute connection process is needed to solve these problems. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the defects of poor sealing and easy rusting and falling off of the volute after welding of the range hood in the prior art, and to provide a volute sealing connection process and structure.

[0006] The present invention solves the above-mentioned technical problems through the following technical solution:

[0007] A volute sealing connection process involves bonding the volute annular wall, the volute front cover, and the volute rear cover together using an adhesive bonding method. Then, the volute front cover and the volute rear cover are welded to the volute annular wall to form a volute assembly. The volute sealing connection process further includes the following steps:

[0008] S1. Before bonding the front cover and the rear cover of the volute to the volute ring wall, remove the surface coating of the volute ring wall, the front cover and the rear cover of the volute from the bonding area.

[0009] S2. Before bonding the front cover and the rear cover of the volute to the volute ring wall, apply adhesive to the bonding areas of the volute ring wall and the front cover and the volute ring wall and the rear cover, and leave welding space after applying adhesive. Then, attach the adhesive-coated front cover and rear cover to both sides of the volute ring wall.

[0010] S3. Weld the joints to be welded between the volute ring wall and the front cover of the volute, and the joints to be welded between the volute ring wall and the rear cover of the volute, using galvanometer laser welding.

[0011] In this solution, by cleaning the surface coating of the areas to be bonded, the adhesive applied during bonding adheres better to the surfaces of the areas to be bonded on the volute ring wall and the front and rear covers of the volute. This prevents adhesive overflow at the bonding areas when bonding the front and rear covers to the volute ring wall, thus avoiding interference with the reserved welding space. The bonding method also prevents excess moisture from entering the narrow gap formed between the volute ring wall and the front and rear covers, improving the sealing performance of the volute assembly. Furthermore, removing the surface coating at the areas to be welded during welding avoids molten coating droplets from melting and evaporating during high-temperature welding, which can cause splattering.

[0012] Preferably, the method further includes the following steps before step S1:

[0013] Step S0: The thickness of the front cover of the volute, the thickness of the rear cover of the volute, and the thickness of the volute ring wall are processed into different thicknesses, wherein the thickness of the front cover of the volute is greater than the thickness of the rear cover of the volute, and the thickness of the rear cover of the volute is greater than the thickness of the volute ring wall.

[0014] In this solution, while keeping the thickness of the volute ring wall unchanged, increasing the thickness of the front and rear covers of the volute will improve the strength of the volute assembly after bonding and welding. Furthermore, the volute assembly is less prone to deformation when assembled with other parts of the range hood, ensuring its normal use.

[0015] Preferably, step S0 further includes: when processing the volute annular wall, forming flanges on both sides of the volute annular wall.

[0016] In this solution, bonding and welding by flanging can ensure the connection space required for gluing and welding, which is conducive to the smooth connection of the front cover, rear cover and annular wall of the volute.

[0017] Preferably, step S2 further includes:

[0018] Step S21: When applying adhesive to the bonding areas of the volute ring wall and the front cover of the volute, and the bonding areas of the volute ring wall and the rear cover of the volute, apply adhesive to the side of the bonding area closest to the volute ring wall and the side furthest from the volute ring wall respectively to form an inner adhesive line and an outer adhesive line.

[0019] In this solution, when applying adhesive to the bonding areas of the volute ring wall and the front cover of the volute, and to the bonding areas of the volute ring wall and the rear cover of the volute, adhesive is applied to the side closest to the volute ring wall and the side furthest from the volute ring wall, forming inner and outer adhesive lines. These inner and outer adhesive lines enclose the area to be welded, preventing excess moisture from entering the narrow gap during self-cleaning and also preventing cooking fumes generated outside the volute assembly from entering the volute assembly. This reduces the accumulation of fumes in the narrow gap and decreases the likelihood of bacteria and other microorganisms entering the volute assembly through the narrow gap. Furthermore, the inner and outer adhesive lines effectively increase the number of sealing points at the bonding areas, further improving the sealing effect.

[0020] Preferably, step S2 further includes:

[0021] Step S22: When applying adhesive to the side of the area to be bonded that is close to the volute ring wall and the side that is far from the volute ring wall, the adhesive application width shall be controlled to be no more than 0.5 mm.

[0022] In this solution, the adhesive application width is controlled to prevent the adhesive from overflowing onto the welding area after bonding, thus avoiding affecting the welding quality.

[0023] Preferably, step S2 further includes:

[0024] Step S23: When attaching the glued front cover and rear cover of the volute to both sides of the volute ring wall, the gap between the front cover and the volute ring wall and the rear cover and the volute ring wall shall be controlled to be no more than 0.1 mm.

[0025] In this solution, the welding quality is ensured by controlling the bonding gap, avoiding situations such as incomplete welding, missing welding, or other welding deficiencies caused by excessive gap.

[0026] Preferably, step S2 further includes:

[0027] Step S24: After attaching the front cover of the volute to the volute ring wall and after attaching the rear cover of the volute to the volute ring wall, the distance between the inner adhesive line and the outer adhesive line is controlled to be no less than 3mm.

[0028] In this solution, by limiting the spacing between the inner and outer adhesive lines after bonding, sufficient welding space is ensured at the welding point between the inner and outer adhesive lines, thus avoiding the impact of excessively narrow spacing on welding quality.

[0029] Preferably, after step S3, the method further includes:

[0030] Step S4: Transport the volute assembly that meets the welding quality requirements to the electrophoresis line for electrophoresis, and use the electrophoresis line to cure the adhesive applied to the bonding area.

[0031] In this solution, after welding, the volute assembly is electrophoretically coated, so that the surface of the volute assembly is coated with electrophoretic paint. The electrophoretic paint is integrally formed, and the connection between the volute ring wall and the front cover or the volute ring wall and the rear cover is sealed again, further improving the sealing performance of the volute assembly.

[0032] Preferably, the adhesive applied to the bonding area is a polyurethane adhesive.

[0033] In this solution, the polyurethane adhesive can be quickly dried by the drying equipment of the electrophoresis line during the electrophoresis process, so as to achieve rapid curing of the adhesive during electrophoresis, save curing time, and shorten the processing cycle of the volute assembly.

[0034] A range hood volute, which is manufactured by the volute sealing connection process described in any of the above claims.

[0035] In this solution, the removal of the surface coating at the bonding area through the volute sealing connection process can improve the adhesion of the adhesive to the bonding area and prevent problems such as adhesive leakage and overflow when attaching the front or rear cover of the volute after applying the adhesive. At the same time, the surface coating at the welding area will not melt into droplets and splatter due to the high temperature generated during welding, thus improving the safety and quality of welding.

[0036] The positive and progressive effects of this invention are as follows: This invention seals the front cover and rear cover of the volute to both sides of the volute ring wall through bonding and welding. Bonding can seal the narrow gaps formed by the connection between the front cover and the volute ring wall and the rear cover and the volute ring wall. Welding can improve the connection strength. By removing the surface coating at the bonding area, the bonding effect is improved, preventing glue leakage when the front cover and rear cover of the volute are attached to the volute ring wall and affecting the reserved welding space. In addition, welding at the welding area where the surface coating has been removed prevents the surface coating from melting at high temperature during welding, and the molten droplets after melting will vaporize and splash at high temperature, thus improving the safety of the sealed connection. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure of a volute assembly according to an embodiment of the present invention.

[0038] Figure 2 This is a schematic diagram showing the positional relationship between the inner and outer adhesive lines at the bonding point of the volute ring wall according to an embodiment of the present invention.

[0039] Figure 3 This is a flowchart of a volute sealing connection process according to an embodiment of the present invention.

[0040] Explanation of reference numerals in the attached figures:

[0041] volute assembly 1

[0042] Volute front cover 2

[0043] 3rd volute cover

[0044] 4 ring walls of the volute

[0045] 5 places to be welded

[0046] Flip-edge 6

[0047] Inner adhesive line 7

[0048] outer rubber line 8 Detailed Implementation

[0049] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0050] like Figure 1 As shown, the volute assembly 1 mainly includes a front cover 2, a rear cover 3, and an annular wall 4. The front cover 2, rear cover 3, and annular wall 4 are all coated with a surface layer, such as a zinc plating layer, to resist corrosion and oxidation. The annular wall 4 has a ring-shaped structure, and its two sides are used for welding to the front cover 2 and rear cover 3, respectively. During welding, the front cover 2 and rear cover 3 need to be attached to both sides of the annular wall 4. After attachment, the front cover 2 and... A narrow gap for welding will be formed between the volute ring wall 4. Similarly, a narrow gap for welding will also be formed between the volute back cover 3 and the volute ring wall 4. When the volute assembly 1 is self-cleaning or during normal cooking, excess moisture or microorganisms and bacteria will enter the narrow gap, causing the volute assembly 1 to rust. This may affect the range hood's smoke extraction effect, or even cause the entire volute assembly 1 to fall off, leading to a safety accident, or cause microorganisms and bacteria to multiply and endanger the safety of the food cooked by the user.

[0051] This embodiment provides a volute sealing connection process. The volute annular wall 4, the volute front cover 2, and the volute rear cover 3 are bonded together using an adhesive method. Then, the volute front cover 2 and the volute rear cover 3 are welded to the volute annular wall 4 to form the volute assembly 1. This adhesive-welding method not only improves the sealing performance of the narrow gap but also enhances the positioning accuracy of the volute annular wall 4 with the volute front cover 2 and the volute annular wall 4 with the volute rear cover 3 during welding, thus improving the welding quality. Compared to manually spraying putty powder into the narrow gap using a spray gun, this method avoids the situation where the putty powder sprayed by the manual spray gun cannot penetrate the narrow gap due to its small size, resulting in poor sealing. This improves the sealing performance of the volute assembly 1 and extends its service life.

[0052] And, as Figure 3 As shown, the volute sealing connection process also includes the following steps:

[0053] S1. Before bonding the front cover 2 and the rear cover 3 of the volute to the volute ring wall 4, remove the surface coating of the volute ring wall 4, the front cover 2 and the rear cover 3 of the volute to be bonded.

[0054] S2. Before bonding the front cover 2 and the rear cover 3 of the volute to the volute ring wall 4, apply adhesive to the bonding areas of the volute ring wall 4 and the front cover 2 and the rear cover 3 of the volute, and leave space for welding after applying adhesive. Then, attach the front cover 2 and the rear cover 3 of the volute to the two sides of the volute ring wall 4 respectively.

[0055] S3. Weld the joints 5 to be welded between the volute ring wall 4 and the front cover 2 of the volute, and the joints 5 to be welded between the volute ring wall 4 and the rear cover 3 of the volute using galvanometer laser welding.

[0056] This embodiment uses a zinc-plated layer as an example for the surface coating, but it is not limited to a zinc-plated layer. By cleaning the surface coating of the area to be bonded, the metal material of the front cover 2, rear cover 3, and ring wall 4 of the volute is exposed when applying adhesive. The surface coating can be cleaned by sanding the area to be bonded with 80-grit sandpaper. Of course, in other embodiments, the surface coating can also be cleaned by removing the coating. The specific implementation process of removing the surface coating is within the scope of existing technology and will not be described in detail here. After cleaning the surface coating, adhesive is applied to the surface of the area to be bonded. When bonding the volute assembly 1, a three-axis glue applicator is used to apply adhesive to the area to be bonded. The front cover 2, rear cover 3, and ring wall 4 of the volute are fixed on the three-axis glue applicator by the corresponding tooling plates. The three-axis glue applicator mainly includes a screw valve and a glue supply device. The screw valve is used to control the glue output of the glue supply device under different working conditions to improve the glue application accuracy. Among them, the three-axis glue applicator and tooling plate are existing glue applicator equipment and fixed tooling, and their specific structure and principle will not be elaborated here. The friction of the metal material to be bonded after removing the surface coating is greater, and glue leakage is less likely to occur after application. At the same time, glue overflow is greatly reduced when the front cover 2 and rear cover 3 of the volute are attached to the volute ring wall 4. Reducing glue overflow can prevent glue from flowing into the reserved welding space, ensuring welding quality. On the other hand, the glue seals the narrow gap, preventing excess moisture or microorganisms from entering the narrow gap.

[0057] Furthermore, after removing the surface coating and applying adhesive, the front cover 2 and the rear cover 3 of the volute are respectively attached to both sides of the volute annular wall 4. At this time, by applying adhesive to the bonding area, the front cover 2, the rear cover 3, and the annular wall 4 of the volute are bonded together. The bonding pre-positions the connection between the front cover 2, the rear cover 3, and the annular wall 4 of the volute, so as to ensure accurate positioning when welding the welding points 5 of the front cover 2, the rear cover 3, and the annular wall 4 of the volute, thereby improving the welding quality.

[0058] Simultaneously, before welding, the surface coatings of the areas to be bonded, including the front cover 2, rear cover 3, and annular wall 4 of the volute, have been removed, and the corresponding welding spaces have also had their surface coatings removed. In other words, the surface coating of the area to be welded 5 has been removed. Therefore, the welding is performed by first welding the front cover 2 to the annular wall 4, and then welding the rear cover 3 to the annular wall 4. The welding equipment used is a galvanometer laser welding device, which includes a galvanometer laser welding fixture and a welding mirror assembly. The annular wall 4 is placed on the galvanometer laser welding fixture and fixed using a pneumatic device. Then, the front cover 2 is placed on the annular wall 4, and a pneumatic-hydraulic booster cylinder is used to pressurize it. The welding points 5 of the front cover 2 and the annular wall 4 of the volute are pressed together. The welding mirror assembly moves along the welding points 5 and welds the volute 2 and the annular wall 4 together. Similarly, after welding the front cover 2 and the annular wall 4, the galvanometer laser welding fixture is returned to its original position and the welded front cover 2 and the annular wall 4 are placed on the second station of the galvanometer laser welding fixture. Then, the rear cover 3 of the volute is pressed together with the other side of the annular wall 4 by the pneumatic-hydraulic booster cylinder. The welding mirror assembly also moves along the welding points 5 and welds the front cover 2, the rear cover 3, and the annular wall 4 to form the volute assembly 1. The galvanometer laser welding fixture, the pneumatic-hydraulic booster cylinder, and the pneumatic device are existing welding equipment and will not be described in detail here. By removing the surface coating of 5, on the one hand, it prevents the high temperature generated by the welding equipment during welding from melting the surface coating, causing welding porosity defects due to the evaporation of the surface coating, or even causing high-temperature molten droplets to be blown away after the surface coating vaporizes, resulting in high-temperature molten droplet splashing, which affects welding safety; on the other hand, removing the surface coating allows the welding equipment to directly heat the metal material that removes the surface coating, making welding faster and the welding time correspondingly shorter.

[0059] In this embodiment, the method further includes the following step before step S1:

[0060] Step S0: The thickness of the front cover 2, the rear cover 3, and the ring wall 4 of the volute are processed into different thicknesses, wherein the thickness of the front cover 2 is greater than the thickness of the rear cover 3, and the thickness of the rear cover 3 is greater than the thickness of the ring wall 4.

[0061] Specifically, the front cover 2, rear cover 3, and annular wall 4 of the volute are all made of DC51D+Z material and are processed using existing molds and forming equipment. The molds are used to create the shapes of the front cover 2, rear cover 3, and annular wall 4. The forming equipment, such as sheet metal equipment, is used to ensure the thickness of the front cover 2, rear cover 3, and annular wall 4. The thickness of the front cover 2 is 0.8 mm, the thickness of the rear cover 3 is 0.7 mm, and the thickness of the annular wall 4 is 0.5 mm. The thickness of the annular wall 4 remains unchanged compared to existing annular wall thicknesses. The thickness of the front cover 2 and rear cover 3 is increased accordingly. The overall strength of the volute assembly 1 is enhanced after bonding and welding. Furthermore, since the volute assembly 1 may come into contact with other parts in the range hood during assembly, the thickness of the front cover 2 and the rear cover 3 of the volute assembly 1 is increased to prevent deformation such as dents. This ensures that the suction efficiency of the volute assembly 1 will not be affected by the reduced internal space during use, thus ensuring normal use for users and improving the user experience. Increasing the thickness of the front cover 2 and the rear cover 3 also facilitates the handling by operators and improves the processing precision of the volute assembly 1 during bonding and welding.

[0062] Furthermore, such as Figure 2 As shown, step S0 further includes: during the processing of the volute annular wall 4, forming flanges 6 on both sides of the volute annular wall 4. The flange 6 is a plate material disposed on the edge of the volute annular wall 4. One side of the flange 6 extends towards the middle area of ​​the volute annular wall 4, and the other side is connected to the edge of the volute annular wall 4. The flange 6 can be integrally formed with the volute annular wall 4, or it can be welded to the volute annular wall 4. The bonding area and the welding area of ​​the volute annular wall 4 are both located on the flange 6. In this embodiment, the height of the side of the flange 6 away from the edge of the volute annular wall 4 is set to 6mm to meet the space required for applying glue to the bonding area and to avoid glue overflow in the welding space due to the small size of the flange 6.

[0063] In other embodiments, the height of the side of the flange 6 away from the edge of the volute annular wall 4 can be set to be greater than 6 mm, in order to ensure the quality of bonding and welding.

[0064] In this embodiment, step S2 further includes:

[0065] Step S21: When applying adhesive to the bonding areas of the volute ring wall 4 and the front cover 2 of the volute and the rear cover 3 of the volute, apply adhesive to the side of the bonding area close to the volute ring wall 4 and the side away from the volute ring wall 4 respectively to form an inner adhesive line 7 and an outer adhesive line 8.

[0066] Specifically, taking the application of adhesive on the side of the flange 6 near the volute ring wall 4 and the side away from the volute ring wall 4 to form an inner adhesive line 7 and an outer adhesive line 8 as an example, when applying adhesive, the adhesive head of the three-axis adhesive applicator first applies adhesive along the edge of the volute ring wall 4 near the bonding area of ​​the volute front cover 2 and the volute rear cover 3, and then applies adhesive along the edge of the bonding area away from the volute ring wall 4. A welding space is reserved between the inner adhesive line 7 and the outer adhesive line 8, which is the welding area 5. After the adhesive-coated volute front cover 2 and the volute ring wall 4 are attached, adhesive is applied to both sides of the welding area 5. Applying adhesive to both sides ensures that after the subsequent welding of the volute assembly 1, the narrow gap of the volute assembly 1 is sealed, so that excess water or oil fumes cannot enter the narrow gap, and the welded part in the narrow gap of the volute assembly 1 is protected from corrosion, thereby improving the service life of the volute assembly 1.

[0067] In addition, setting the inner adhesive line 7 and the outer adhesive line 8 is equivalent to increasing the number of connection points in the narrow gap. The number of connection points can seal the narrow gap, that is, increase the number of sealing points, so that the sealing effect of the narrow gap of the volute assembly 1 is further improved.

[0068] Furthermore, step S2 also includes:

[0069] Step S22: When applying adhesive to the side of the area to be bonded, near the volute ring wall 4 and away from the volute ring wall 4, the adhesive application width should be controlled to be no more than 0.5 mm. During the adhesive application process, the amount of adhesive dispensed by the adhesive supply device is controlled by controlling the screw valve of the triaxial adhesive applicator, and the movement speed of the adhesive head is also controlled to ensure the adhesive application width. By controlling the adhesive application width, it is prevented that the applied adhesive overflows to the area to be welded 5 after bonding, and prevents the front cover 2, rear cover 3, and volute ring wall 4 from failing to weld due to the adhesive forming steam and causing splashing under high temperature during the galvanometer laser welding process, or affecting the welding quality.

[0070] In addition, step S2 also includes:

[0071] Step S23: When attaching the glued front cover 2 and rear cover 3 of the volute to both sides of the volute annular wall 4, the gap between the front cover 2 and the volute annular wall 4 and the rear cover 3 and the volute annular wall 4 should be controlled to be no more than 0.1 mm. During the attachment of the front cover 2 and the rear cover 3 to the volute annular wall 4, the attachment gap is controlled by a pneumatic-hydraulic booster cylinder to ensure proper attachment of the front cover 2 and the rear cover 3 to the volute annular wall 4, thereby ensuring welding quality and avoiding incomplete welding, missed welding, or other welding deficiencies caused by excessive gaps.

[0072] Furthermore, step S2 also includes:

[0073] Step S24: After attaching the front cover 2 of the volute to the volute ring wall 4 and after attaching the rear cover 3 of the volute to the volute ring wall 4, the distance between the inner adhesive line 7 and the outer adhesive line 8 should be controlled to be no less than 3mm.

[0074] Specifically, after the front cover 2 and the annular wall 4 of the volute housing and the rear cover 3 and the annular wall 4 of the volute housing are properly bonded using a pneumatic-hydraulic booster cylinder, the adhesive applied to the bonding areas of the front cover 2, the rear cover 3, and the annular wall 4 is flattened by compression. The flattened adhesive overflows to both sides. By controlling the gap between the flattened inner adhesive line 7 and the outer adhesive line 8 to be no less than 3mm, the welding space between the inner adhesive line 7 and the outer adhesive line 8 is ensured, preventing the flattened adhesive from overflowing into the welding space and guaranteeing welding quality. Preferably, the adhesive applied to the bonding areas is polyurethane adhesive.

[0075] In this embodiment, the method further includes the following after step S3:

[0076] Step S4: Transport the volute assembly 1 that meets the welding quality requirements to the electrophoresis line for electrophoresis, and use the electrophoresis line to cure the adhesive applied to the bonding area.

[0077] Specifically, the electrophoretic coating production line, also known as an electrophoresis line, includes a coating tank and drying equipment, which are existing technologies and will not be elaborated upon here. After bonding and welding the front cover 2, rear cover 3, and annular wall 4 of the volute to form the volute assembly 1, the welding quality of the volute assembly 1 is manually observed, especially the sealing of narrow seams. The volute assembly 1 that meets the welding quality is then sent to the electrophoresis line for electrophoresis, so that the surface of the volute assembly 1 is coated with electrophoretic paint. The electrophoretic paint is integrally formed, and the narrow seams at the connection between the annular wall 4 and the front cover 2 or the annular wall 4 and the rear cover 3 are sealed again, further improving the sealing performance of the volute assembly.

[0078] Furthermore, since the adhesive applied to the bonding area is polyurethane adhesive, polyurethane adhesive can be quickly dried by the drying equipment of the electrophoresis line during the electrophoresis process. In other words, while the drying equipment is drying the electrophoretic paint, the adhesive applied to the bonding area is also cured simultaneously, achieving complete sealing of the narrow gap. There is no need to cure the applied adhesive separately, thereby saving curing time, shortening the processing cycle of the volute assembly 1, and saving processing costs.

[0079] This embodiment also provides a range hood volute, which is manufactured by the volute sealing connection process described above.

[0080] Specifically, by removing the surface coating at the bonding area through the volute sealing connection process, the adhesion of the adhesive to the bonding surface can be improved, preventing problems such as adhesive leakage and overflow when attaching the front cover 2 or rear cover 3 of the volute after applying adhesive. At the same time, removing the surface coating at the welding area 5 will prevent the surface coating from melting into droplets and splattering due to the high temperature generated during welding, thus improving the safety and quality of welding. Furthermore, it eliminates the need for operators to spray putty powder to seal the narrow gaps of the volute assembly 1 after welding, improving processing efficiency.

[0081] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A volute sealing connection process, characterized in that, The method involves bonding the volute annular wall, the volute front cover, and the volute rear cover together using an adhesive bonding method. Then, the volute front cover and the volute rear cover are welded to the volute annular wall to form a volute assembly. The volute sealing connection process further includes the following steps: S1. Before bonding the front cover and the rear cover of the volute to the volute ring wall, remove the surface coating of the volute ring wall, the front cover and the rear cover of the volute from the bonding area. S2. Before bonding the front cover and the rear cover of the volute to the volute ring wall, apply adhesive to the bonding areas of the volute ring wall and the front cover and the volute ring wall and the rear cover, and leave welding space after applying adhesive. Then, attach the adhesive-coated front cover and rear cover to both sides of the volute ring wall. S3. Weld the joints to be welded between the volute ring wall and the front cover of the volute, and the joints to be welded between the volute ring wall and the rear cover of the volute, using galvanometer laser welding.

2. The volute sealing connection process method as described in claim 1, characterized in that, The steps preceding step S1 also include: Step S0: The thickness of the front cover of the volute, the thickness of the rear cover of the volute, and the thickness of the volute ring wall are processed into different thicknesses, wherein the thickness of the front cover of the volute is greater than the thickness of the rear cover of the volute, and the thickness of the rear cover of the volute is greater than the thickness of the volute ring wall.

3. The volute sealing connection process method as described in claim 2, characterized in that, Step S0 further includes: when processing the volute ring wall, forming flanges on both sides of the volute ring wall.

4. The volute sealing connection process method as described in claim 1, characterized in that, Step S2 also includes: Step S21: When applying adhesive to the areas to be bonded on the volute ring wall and the front cover of the volute, and to the areas to be bonded on the rear cover of the volute, apply adhesive to the side of the areas to be bonded on the volute ring wall and the front cover of the volute, and to the side of the areas to be bonded on the volute ring wall and the rear cover of the volute, respectively, to form an inner adhesive line and an outer adhesive line.

5. The volute sealing connection process method as described in claim 4, characterized in that, Step S2 also includes: Step S22: When applying adhesive to the bonding areas of the volute ring wall and the front cover of the volute, and to the bonding areas of the volute ring wall and the rear cover of the volute, on the side near the volute ring wall and the side away from the volute ring wall, the adhesive application width shall be controlled to be no more than 0.5 mm.

6. The volute sealing connection process method as described in claim 5, characterized in that, Step S2 also includes: Step S23: When attaching the glued front cover and rear cover of the volute to both sides of the volute ring wall, the gap between the front cover and the volute ring wall and the rear cover and the volute ring wall shall be controlled to be no more than 0.1 mm.

7. The volute sealing connection process method as described in claim 6, characterized in that, Step S2 also includes: Step S24: After attaching the front cover of the volute to the volute ring wall and after attaching the rear cover of the volute to the volute ring wall, the distance between the inner adhesive line and the outer adhesive line is controlled to be no less than 3mm.

8. The volute sealing connection process method as described in claim 1, characterized in that, The process after step S3 also includes: Step S4: Transport the volute assembly that meets the welding quality requirements to the electrophoresis line for electrophoresis, and use the electrophoresis line to cure the adhesive applied to the bonding areas of the volute ring wall and the front cover of the volute, and the bonding areas of the volute ring wall and the rear cover of the volute.

9. The volute sealing connection process method as described in claim 1, characterized in that, The adhesive applied to the bonding areas of the volute ring wall and the front cover of the volute, and the bonding areas of the volute ring wall and the rear cover of the volute, is polyurethane adhesive.

10. A range hood volute, characterized in that, It is manufactured by the volute sealing connection process as described in any one of claims 1-9.

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