Energy-saving vacuum brazing furnace

Abstract

The present invention relates to the technical field of brazing furnaces, and discloses an energy-saving vacuum brazing furnace, comprising an outer cylinder, an inner cylinder arranged inside the outer cylinder, a closing cover arranged at the openings at both ends of the outer cylinder, a heating device and a support table arranged inside the inner cylinder, and a placement component, wherein the placement component specifically comprises a push chute opened at the top of the support table, a push slider arranged inside the push chute, a rotating slot and a column arranged at the top of the push slider, and a placement rack arranged at the top of the column. The energy-saving vacuum brazing furnace, by arranging the placement component, the column lifts the placement rack so that it is located at the center of the inner cylinder, and the distance from the heating device is the same on all sides, so that the parts in the placement rack are evenly heated, avoiding different parts from having inconsistent brazing degrees due to uneven heating, and avoiding uneven heating at different positions of the parts and causing offset deformation, thereby ensuring the brazing effect of the connection and improving the quality of the product.

Description

Technical Field

[0001] The invention relates to the technical field of brazing furnaces, and in particular to an energy-saving vacuum brazing furnace. Background Art

[0002] Brazing furnace is a device used in brazing process. It heats the weldment and brazing material so that the liquid brazing material wets the base material and fills the gap in the joint to achieve connection. There are mainly vacuum, continuous and protective atmosphere brazing furnaces. It is widely used in aerospace, electronics, automobiles, home appliances and other fields to manufacture high-quality parts. Its components include heating system, vacuum system, control system and furnace structure. It can accurately control parameters, provide a suitable environment for brazing, ensure welding quality and reliability, and play an important role in modern industrial production.

[0003] The patent with the patent publication number CN220902106U discloses a furnace body structure of a high-temperature vacuum brazing furnace, which relates to the field of vacuum brazing furnaces, including an upper furnace shell arranged on the upper side of a lower furnace shell, and also including two groups of first sealing strips and two groups of second sealing strips. A connecting hinge is connected between the lower furnace shell and the upper furnace shell, and lower connecting plates are fixedly connected to the outer side surface of the lower furnace shell near the edge positions on both sides, and upper connecting plates are fixedly connected to the outer side surface of the upper furnace shell near the edge positions on both sides. A sealing door panel is rotatably installed on the side of the upper furnace shell away from the connecting hinge, and the two groups of first sealing strips are fixedly connected to the two ends of the lower furnace shell, and the two groups of second sealing strips are fixedly connected to the two ends of the upper furnace shell. The utility model has the advantages that the furnace body structure can be assembled and installed while ensuring the sealing of the furnace body, and the difficulty of overhauling the internal structure of the furnace body can also be reduced to improve the overhaul efficiency, and the switching between the static state and the moving state of the furnace body structure is realized, which is convenient to use.

[0004] The prior art has the following defects:

[0005] Since the heating system of the brazing furnace is set up around the inner wall, when the parts are placed, the parts in different areas or different areas of the parts are at different distances from the inner wall of the brazing furnace, which will cause different parts or different areas of the parts to be heated unevenly. Some parts may be poorly welded due to insufficient temperature or over-welded due to excessive temperature, or some parts may be deformed and offset due to stress pulling. These situations will affect the welding effect and reduce the quality of the parts. Summary of the invention

[0006] In view of the fact that in the prior art, parts in different areas or different areas of parts have different distances from the inner wall of the brazing furnace, which may lead to uneven heating of different parts or different areas of parts, an energy-saving vacuum brazing furnace is proposed.

[0007] The present application provides an energy-saving vacuum brazing furnace, the purpose of which is to allow parts to be heated evenly.

[0008] The technical scheme of the present invention is: an energy-saving vacuum brazing furnace, comprising an outer cylinder, an inner cylinder arranged inside the outer cylinder, a closing cover arranged at the openings at both ends of the outer cylinder, a heating device and a support table arranged in the inner cylinder, and a placement component, the placement component specifically comprising a push chute opened on the top of the support table, a push slider arranged inside the push chute, a rotating slot and a column arranged on the top of the push slider, and a placement frame arranged on the top of the column;

[0009] The heating equipment is distributed around the inner wall of the inner cylinder, and one end of the column away from the placement rack is inserted into the rotating slot, and the placement rack is located at the center of the inner cylinder.

[0010] Furthermore, the heating device is specifically an electromagnetic coil, which is spirally distributed around the placement rack.

[0011] Furthermore, the pushing slides are symmetrically arranged in two pieces, and the placing racks are symmetrically arranged in two groups.

[0012] Furthermore, the placement rack specifically includes a main beam, an inner sleeve and an outer sleeve, a threaded hole opened below the main beam, a fracture opened below the inner sleeve and the outer sleeve, a blocking plate arranged at the opening above the fracture, a fracture opened on the inner wall of the inner sleeve and the outer sleeve, and a splicing slider arranged on the outer wall of the main beam and the inner sleeve;

[0013] The inner sleeve and the outer sleeve are sequentially sleeved on the outer side of the main beam, and the three are concentrically designed. One end of the column away from the pushing slider passes through the fracture and is inserted into the threaded hole, and the splicing slider is slidably connected in the splicing slide groove.

[0014] Furthermore, the splicing slider is distributed in an inverted "T" shape, and the splicing slider and the blocking plate 656 divide the space between the main beam, the inner sleeve and the outer sleeve into four independent intervals.

[0015] Furthermore, the placement rack further includes mounting slide grooves arranged on both sides of the main beam, the inner sleeve and the outer sleeve, a placement channel arranged between the main beam, the inner sleeve and the outer sleeve, and mounting slide blocks arranged on both sides of the placement channel;

[0016] The placement channel is slidably installed between the main beam, the inner sleeve and the outer sleeve, and the installation slide block is slidably installed in the installation slide groove.

[0017] Furthermore, the outer wall of the placement channel adopts an arc-shaped design, and the outer wall of the placement channel between the main beam and the inner sleeve respectively fits the outer contour of the main beam and the inner contour of the inner sleeve, and the outer wall of the placement channel between the outer sleeve and the inner sleeve respectively fits the inner contour of the outer sleeve and the outer contour of the inner sleeve.

[0018] Furthermore, partition plates are arranged inside the placement channel, and the partition plates are distributed in a linear array inside the placement channel.

[0019] Furthermore, a hollow design is adopted at the central axis of the main beam.

[0020] Beneficial effects of the present invention:

[0021] 1. By setting up the placement component, the column lifts the placement rack so that it is located at the center of the inner tube, and the distance from the heating equipment is the same on all sides, so that the parts in the placement rack can be heated evenly, avoiding the inconsistent brazing degree of different parts due to uneven heating, and avoiding the displacement and deformation of parts due to uneven heating at different positions, thereby ensuring the brazing effect of the connection and improving the quality of the product.

[0022] 2. Heat the parts through the electromagnetic coil. When the alternating current passes through the electromagnetic coil, an alternating magnetic field will be generated around the coil. The alternating magnetic field will generate an induced electromotive force inside the parts in the magnetic field, and then form an induced current inside the parts. When the induced current flows inside the parts, the current will generate heat through the resistor, thereby increasing the temperature of the parts and achieving the purpose of heating. In this way, the parts themselves heat up, which can reduce the loss in the heat transfer process, thereby achieving the purpose of brazing with less energy.

[0023] 3. By setting up a placement rack with a ring-shaped parts placement space, the connections placed in the same parts placement space receive the same induced current and the temperature generated inside the parts is also the same, so that uniform heating can be better achieved, thereby improving product quality. At the same time, the main beam, inner sleeve and outer sleeve are layered, and the more sleeves are layered, the more parts placement space there is, and the closer to the outside, the lower the temperature of the parts, so that the space can be more fully and reasonably utilized, and the sleeves can be selectively increased or decreased according to the type of connection required for brazing, and placed in a suitable parts placement space, thereby achieving precise control and improving the brazing quality.

[0024] 4. By setting up a placement channel, the parts to be brazed are placed in the placement channel, which makes it convenient to classify and place the parts. The parts can be spaced apart from each other, so that the space for placing the parts can be fully utilized and interference between the parts can be avoided, which further ensures the brazing quality of the connection.

[0025] At the same time, placing the parts in the placement channel can also prevent the brazing material on the surface of the parts from falling into the inner tube during heating or loading and unloading, and adhering to the surface of the heating equipment after melting, which increases the difficulty of cleaning the equipment and affects the subsequent heating effect.

[0026] By designing the outer wall of the placement channel to be arc-shaped and fitting it with the inner wall or outer wall of the main beam, inner sleeve and outer sleeve respectively, the contact area between the placement channel and the main beam, inner sleeve and outer sleeve is increased, and the state after installation is more stable, avoiding shaking of the placement channel when installing the placement channel or moving the placement frame as a whole, causing deformation and displacement of the parts placed inside due to shaking or collision.

[0027] By setting up a partition plate, the parts placed in the channel can be separated by the partition plate during use, thereby reducing the mutual influence between the parts during the heating process, which is beneficial to improving the quality of the parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A three-dimensional diagram of the energy-saving vacuum brazing furnace of the present invention;

[0029] Figure 2 This is a schematic diagram of the interior of the inner cylinder of the present invention;

[0030] Figure 3 It is a schematic diagram of placing components of the present invention;

[0031] Figure 4 It is a schematic diagram of the placement rack of the present invention;

[0032] Figure 5 This is a disassembly diagram of the placement rack of the present invention;

[0033] Figure 6 This is a disassembled diagram of the placement channel of the present invention;

[0034] Figure 7 This is a schematic diagram of the placement of the channel of the present invention;

[0035] Figure 8 It is the front view of the present invention;

[0036] Fig. 9 For the present invention Figure 8 Enlarged view of the medium shelf.

[0037] In the figure:

[0038] 1. Outer tube; 2. Inner tube; 3. Closing cover; 4. Heating device; 5. Support platform; 6. Placement component; 61. Pushing slide; 62. Pushing slider; 63. Rotating slot; 64. Column; 65. Placement rack; 651. Main beam; 652. Inner sleeve; 653. Outer sleeve; 654. Threaded hole; 655. Fracture; 656. Blocking plate; 657. Splicing slide; 658. Splicing slider; 659. Installing slide; 6510. Placement channel; 6511. Installing slider; 6512. Partition plate. DETAILED DESCRIPTION

[0039] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0040] Reference Figure 1-9 , provides an energy-saving vacuum brazing furnace, including an outer tube 1, an inner tube 2 arranged inside the outer tube 1, a closing cover 3 arranged at the openings at both ends of the outer tube 1, a heating device 4 and a support 5 arranged in the inner tube 2, and also includes a placement component 6, the placement component 6 specifically includes a push chute 61 opened on the top of the support 5, a push slider 62 arranged inside the push chute 61, a rotating slot 63 and a column 64 arranged on the top of the push slider 62, and a placement frame 65 arranged on the top of the column 64.

[0041] Specifically, the closing cover 3 closes both ends of the outer cylinder 1, and the edges of the two ends of the outer cylinder 1 and the edges of the closing cover 3 are provided with teeth that mesh with each other, so that the closing cover 3 can seal the outer cylinder 1 more tightly to prevent air from entering therein and causing oxidation of parts. A fixed frame is installed on the inner wall of the inner cylinder 2 for fixing the heating device 4. The heating device 4 is specifically an electromagnetic coil, which is spirally distributed around the placement frame 65. The heating device 4 is distributed around the inner wall of the inner cylinder 2. The support 5 is welded to the inner wall of the inner cylinder 2 through the support legs, and the outer cylinder 1 is externally connected to a vacuum device.

[0042] There are two symmetrical pushing grooves 61, and the pushing slider 62 is slidably installed in the pushing groove 61. There are two symmetrically arranged groups of placement racks 65, which makes the installation of the placement racks 65 more convenient and avoids the placement racks 65 from being offset and misaligned during installation due to the outer cylinder 1 being too deep or too long; the end of the column 64 away from the placement rack 65 is inserted into the rotating slot 63, and the columns 64 are distributed in a linear array. The placement rack 65 is located at the center of the inner cylinder 2. The placement rack 65 is used to place parts, and the parts are all parts. The heating device 4 is externally connected to a current controller.

[0043] The parts are heated by electromagnetic coils. When alternating current passes through the electromagnetic coils, an alternating magnetic field is generated around the coils. The alternating magnetic field generates an induced electromotive force inside the parts in the magnetic field, and then an induced current is formed inside the parts. When the induced current flows inside the parts, the current generates heat through the resistor, thereby increasing the temperature of the parts and achieving the purpose of heating. In this way, the parts themselves heat up, which can reduce the loss in the heat transfer process, thereby achieving the purpose of brazing with less energy.

[0044] By setting the placement component 6, the column 64 lifts the placement rack 65 so that it is located at the center of the inner tube 2, with the same distance from the heating device 4 on all sides, so that the parts in the placement rack 65 can be evenly heated, avoiding inconsistent brazing degrees of different parts due to uneven heating, and avoiding offset deformation due to uneven heating at different positions of the parts, thereby ensuring the brazing effect of the connection and improving the quality of the product.

[0045] The placement frame 65 specifically includes a main beam 651, an inner sleeve 652 and an outer sleeve 653, a threaded hole 654 opened at the bottom of the main beam 651, a fracture 655 opened at the bottom of the inner sleeve 652 and the outer sleeve 653, a blocking plate 656 arranged at the opening above the fracture 655, a fracture 655 opened on the inner wall of the inner sleeve 652 and the outer sleeve 653, and a splicing slider 658 arranged on the outer wall of the main beam 651 and the inner sleeve 652.

[0046] Specifically, the main beam 651 is concentrically arranged with the inner tube 2, and the main beam 651, the inner sleeve 652 and the outer sleeve 653 are all cylindrical. The inner sleeve 652 and the outer sleeve 653 are sequentially sleeved on the outside of the main beam 651, and the three are concentrically designed. The main beam 651, the inner sleeve 652 and the outer sleeve 653 are fixed by bolts, and an annular parts placement space is formed between the main beam 651, the inner sleeve 652 and the outer sleeve 653. The end of the column 64 away from the pushing slider 62 passes through the fracture 655 and is inserted into the threaded hole 654. The blocking plate 656 extends upward to fit the surface of the inner sleeve 652 or the main beam 651, and the splicing slider 658 is slidably connected in the splicing slide groove 657.

[0047] By setting up a placement rack 65, which has an annular parts placement space, the connections placed in the same parts placement space receive the same induced current and the temperature generated inside the parts is also the same, so that uniform heating can be better achieved, thereby improving product quality. At the same time, the main beam 651, the inner sleeve 652 and the outer sleeve 653 are layered, and the more layers are layered, the more parts placement space there is, and the temperature of the parts closer to the outside is lower, so that the space can be more fully and reasonably utilized, and the sleeves can be selectively increased or decreased according to the type of connection required for brazing, and placed in a suitable parts placement space, thereby achieving precise control and improving the brazing quality.

[0048] The splicing slider 658 is distributed in an inverted "T" shape. The splicing slider 658 and the blocking plate 656 divide the space between the main beam 651, the inner sleeve 652 and the outer sleeve 653 into four independent sections. The four independent sections are TL, BL, BR, and TR in a counterclockwise direction from the upper left. In this way, the splicing slider 658 can play a better supporting role, maintain the stability among the main beam 651, the inner sleeve 652 and the outer sleeve 653, and ensure the smooth processing of parts.

[0049] The placement rack 65 also includes installation grooves 659 arranged on the inner and outer sides of the main beam 651, the inner sleeve 652 and the outer sleeve 653, a placement channel 6510 arranged between the main beam 651, the inner sleeve 652 and the outer sleeve 653, and installation sliders 6511 arranged on both sides of the placement channel 6510.

[0050] Specifically, the installation groove 659 is distributed in a circular array around the central axis of the main beam 651, the placement channel 6510 is slidably installed between the main beam 651, the inner sleeve 652 and the outer sleeve 653, the installation slider 6511 is slidably installed in the installation groove 659, and the parts are placed in the placement channel 6510. The placement channel 6510 is distributed in a circular array around the central axis of the main beam 651. The placement channels 6510 are distributed in four independent intervals in the part placement space, and the placement channels 6510 in the same independent interval are numbered, specifically TL1, TL2..., BL1, BL2, BR1, BR2, TR1, TR2, etc., so as to distinguish the placement channels 6510 in different positions for easy installation. The curvature of the outer wall of the placement channel 6510 in different part placement spaces is obviously different, which needs to be checked and identified during installation.

[0051] By setting up the placement channel 6510, the parts to be brazed are placed in the placement channel 6510, which makes it convenient to classify and place the parts. The parts can be spaced apart from each other, so that the part placement space can be fully utilized and mutual interference between the parts can be avoided, thereby further ensuring the brazing quality of the connection.

[0052] At the same time, placing the parts into the placement channel 6510 can also prevent the solder on the surface of the parts from falling into the inner tube 2 during heating or loading and unloading, and adhering to the surface of the heating device 4 after melting, which increases the difficulty of cleaning the equipment and affects the subsequent heating effect.

[0053] Specifically, the outer wall of the placement channel 6510 adopts an arc-shaped design. The outer wall of the placement channel 6510 between the main beam 651 and the inner sleeve 652 is respectively fitted with the outer contour of the main beam 651 and the inner contour of the inner sleeve 652. The outer wall of the placement channel 6510 between the outer sleeve 653 and the inner sleeve 652 is respectively fitted with the inner contour of the outer sleeve 653 and the outer contour of the inner sleeve 652. In this way, the contact area between the placement channel 6510 and the main beam 651, the inner sleeve 652 and the outer sleeve 653 is increased, and the state after installation is more stable, which avoids shaking of the placement channel 6510 when installing the placement channel 6510 or moving the placement frame 65 as a whole, causing the parts placed inside to be deformed or offset due to shaking or collision.

[0054] Specifically, a partition plate 6512 is provided inside the placement channel 6510 , and the partition plates 6512 are distributed in a linear array in the placement channel 6510 . The partition plates 6512 are snap-fitted into the placement channel 6510 , and the partition plates 6512 can be inserted and pulled out along the curved surface of the inner wall of the placement channel 6510 .

[0055] By providing the partition plate 6512, the partition plate 6512 can be used to separate the parts in the placement channel 6510 during use, thereby reducing the mutual influence between the parts during the heating process, which is beneficial to improving the quality of the parts.

[0056] The central axis of the main beam 651 is hollow in design. The center of the main beam 651 can remain hollow or be filled with the placement channel 6510, so as to avoid excessive heating of the main beam 651 and increase the space for placing parts.

[0057] The working principle of an energy-saving vacuum brazing furnace of the present invention is as follows:

[0058] During installation, screw the column 64 into the threaded hole 654, align the splicing slider 658 on the outer side of the main beam 651 with the splicing groove 657 on the inner side of the inner sleeve 652, then sleeve the inner sleeve 652 on the outer side of the main beam 651, slide the inner sleeve 652 until the splicing slider 658 completely enters the splicing groove 657, during this process, the break 655 is always downward, the column 64 slides in the break 655, and then sleeve the outer sleeve 653 on the outer side of the inner sleeve 652 in the same way, align the splicing slider 658 on the outer side of the inner sleeve 653 with the splicing groove 657 on the inner side of the outer sleeve 653, and then sleeve the outer sleeve 653 on the outer side of the inner sleeve 652. Connect the slide groove 657. After completing the above installation, a parts placement space is formed between the main beam 651, the inner sleeve 652 and the outer sleeve 653. The parts are neatly placed in the placement channel 6510, and the adjacent connections are separated by the partition plate 6512. Then, the placement channel 6510 is inserted into the parts placement space in sequence according to the number on the surface of the placement channel 6510. During this process, the installation slider 6511 is kept sliding and inserted into the installation slide groove 659. The outer wall of the placement channel 6510 is fitted with the main beam 651, the inner sleeve 652 or the outer sleeve 653, and the installation of the placement rack 65 is completed.

[0059] Assemble the push slider 62 under the column 64, insert the column 64 into the rotating slot 63, and then use a forklift, suspension arm or other equipment to lift the placement frame 65, and insert it into the inner tube 2 from both ends of the outer tube 1 in sequence. Keep it stable during the insertion process, and slide the push slider 62 into the push slide groove 61, thus completing the installation of the placement component 6.

[0060] When in use, the closing covers 3 at both ends of the outer tube 1 are closed, and then the air in the outer tube 1 and the inner tube 2 is extracted by the vacuum device, and then the current controller supplies power to the heating device 4. When the alternating current passes through the electromagnetic coil, an alternating magnetic field will be generated around the coil. The alternating magnetic field will generate an induced electromotive force inside the part in the magnetic field, and then an induced current will be formed inside the part. When the induced current flows inside the part, the current will generate heat through the resistor, thereby increasing the temperature of the part. After the temperature increases, the brazing material melts and the brazing work is completed.

[0061] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An energy-saving vacuum brazing furnace, comprising an outer cylinder (1), an inner cylinder (2) arranged inside the outer cylinder (1), a closing cover (3) arranged at the openings at both ends of the outer cylinder (1), a heating device (4) and a support table (5) arranged inside the inner cylinder (2), characterized in that: It also includes a placement component (6), which specifically includes a push chute (61) opened on the top of the support platform (5), a push slider (62) arranged inside the push chute (61), a rotating slot (63) and a column (64) arranged on the top of the push slider (62), and a placement frame (65) arranged on the top of the column (64); The heating device (4) is distributed around the inner wall of the inner cylinder (2), and one end of the column (64) away from the placement rack (65) is inserted into the rotating slot (63), and the placement rack (65) is located at the center of the inner cylinder (2); The placement rack (65) specifically includes a main beam (651), an inner sleeve (652) and an outer sleeve (653), a threaded hole (654) provided below the main beam (651), a fracture (655) provided below the inner sleeve (652) and the outer sleeve (653), a blocking plate (656) provided at the opening above the fracture (655), a fracture (655) provided on the inner walls of the inner sleeve (652) and the outer sleeve (653), and a splicing slider (658) provided on the outer walls of the main beam (651) and the inner sleeve (652); The inner sleeve (652) and the outer sleeve (653) are sequentially sleeved on the outer side of the main beam (651), and the three are designed to be concentric. The end of the column (64) away from the pushing slider (62) passes through the fracture (655) and is inserted into the threaded hole (654). The splicing slider (658) is slidably connected in the splicing slide groove (657). The placement rack (65) further comprises installation slide grooves (659) arranged on both sides of the main beam (651), the inner sleeve (652) and the outer sleeve (653), a placement channel (6510) arranged between the main beam (651), the inner sleeve (652) and the outer sleeve (653), and installation slide blocks (6511) arranged on both sides of the placement channel (6510); The placement channel (6510) is slidably installed between the main beam (651), the inner sleeve (652) and the outer sleeve (653), and the installation slide block (6511) is slidably installed in the installation slide groove (659).

2. The energy-saving vacuum brazing furnace according to claim 1, characterized in that: The heating device (4) is specifically an electromagnetic coil, which is spirally distributed around the placement rack (65).

3. The energy-saving vacuum brazing furnace according to claim 2, characterized in that: The pushing chutes (61) are symmetrically arranged in two pieces, and the placing racks (65) are symmetrically arranged in two sets.

4. The energy-saving vacuum brazing furnace according to claim 3, characterized in that: The splicing slider (658) is distributed in an inverted "T" shape, and the splicing slider (658) and the blocking plate (656) divide the space between the main beam (651), the inner sleeve (652) and the outer sleeve (653) into four independent sections.

5. The energy-saving vacuum brazing furnace according to claim 4, characterized in that: The outer wall of the placement channel (6510) is designed to be arc-shaped. The outer wall of the placement channel (6510) between the main beam (651) and the inner sleeve (652) is respectively in line with the outer contour of the main beam (651) and the inner contour of the inner sleeve (652). The outer wall of the placement channel (6510) between the outer sleeve (653) and the inner sleeve (652) is respectively in line with the inner contour of the outer sleeve (653) and the outer contour of the inner sleeve (652).

6. The energy-saving vacuum brazing furnace according to claim 5, characterized in that: The placement channel (6510) is provided with partition plates (6512) inside, and the partition plates (6512) are distributed in a linear array inside the placement channel (6510).

7. The energy-saving vacuum brazing furnace according to claim 6, characterized in that: The central axis of the main beam (651) is hollow in design.

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