Drying box for surface treatment of metal parts

Abstract

The utility model discloses a drying box for metal piece surface treatment, and relates to the field of metal piece drying, the drying box comprises a drying box body, a placing main piece for placing a metal piece is arranged in the drying box body, and placing auxiliary pieces for expanding the placing space of the metal piece are arranged on the two sides of the surface of the placing main piece; the placing main part comprises a main tray arranged on the inner wall of the drying box body, a plurality of first protrusions used for limiting the metal parts are fixedly arranged on the inner wall of the main tray, the placing auxiliary part comprises auxiliary trays hinged to the two sides of the surface of the main tray, and a plurality of second protrusions used for limiting the metal parts are fixedly arranged on the inner walls of the auxiliary trays. And one side of the surface of the main tray and one side of the surface of the auxiliary tray are each provided with a downward pressing mechanism for positioning the metal piece. The first protrusions and the second protrusions are arranged on the main tray and the auxiliary tray, the lower pressing plate and the protective pad are matched to press and position the metal parts, therefore, the distances between the metal parts are kept consistent, and drying uniformity and consistency are improved.

Description

Technical Field

[0001] This application relates to the field of metal drying, and in particular to drying ovens for surface treatment of metal parts. Background Technology

[0002] Electrophoresis is a process that uses an electric field to deposit coating particles onto a metal surface to form a uniform coating. Electrophoretic coatings can form a dense, continuous protective film on the metal surface, effectively isolating the metal from corrosive factors such as air, moisture, salt spray, and chemical media, significantly improving the corrosion resistance of metal parts. After electrophoretic treatment, metal parts need to be dried in a drying oven to cure the coating. However, drying ovens still have the following shortcomings in practical use:

[0003] Metal parts are usually placed on perforated trays or hooks. During the drying process, the metal parts are subjected to hot air circulation, which causes them to be impacted by the airflow or vibrated by the operation of the drying chamber. This can easily cause the metal parts to shift during the drying process, affecting the uniformity and consistency of drying. Utility Model Content

[0004] To address the issue of metal parts easily shifting during the drying process, this application provides a drying oven for surface treatment of metal parts.

[0005] The drying oven for surface treatment of metal parts provided in this application adopts the following technical solution:

[0006] A drying oven for surface treatment of metal parts includes a drying oven body, wherein a main placement component for placing metal parts is provided inside the drying oven body, and secondary placement components for expanding the placement space of metal parts are provided on both sides of the surface of the main placement component.

[0007] The main component includes a main tray disposed on the inner wall of the drying oven body. The inner wall of the main tray is fixed with a plurality of protrusions for limiting the metal parts. Every four protrusions divide the interior of the main tray into a plurality of independent placement spaces. The surface of each placement space is provided with a plurality of through holes.

[0008] The placement sub-component includes a sub-tray hinged to both sides of the main tray surface. The inner wall of the sub-tray is fixed with a plurality of protrusions II for limiting the metal parts. Every four protrusions II divide the interior of the sub-tray into a plurality of independent placement spaces II. The surface of the placement space II is provided with a plurality of through holes II. Both the main tray and the sub-tray are provided with a pressing mechanism for positioning the metal parts on one side of their surfaces.

[0009] By adopting the above technical solution, and by combining the main component with the auxiliary component, different placement spaces can be selected according to metal parts of different sizes. During the drying process of the metal parts in the drying oven body, the first protrusion, the second protrusion, and the pressing mechanism are used to position the metal parts and prevent them from shifting during the drying process.

[0010] Preferably, the pressing mechanism includes a pressing seat slidably disposed on one side of the surface of the auxiliary tray and the main tray, a screw threadedly connected to one side of the surface of the pressing seat, a driving block fixedly disposed at the end of the screw away from the main tray, and a pressing plate slidably disposed on one side of the surface of the pressing seat.

[0011] By adopting the above technical solution, the drive block provides power to the screw, causing the drive block to drive the screw to rotate. The screw drives the lower pressure seat to move vertically, and the lower pressure seat drives the lower pressure plate to move vertically, so that the lower pressure plate can adjust the distance between the lower pressure plate and the surface of the metal part according to the different heights of the metal part.

[0012] Preferably, a protective pad is fixed on the side of the lower pressure plate away from the drive block, and a through hole is provided on one side of both the lower pressure plate and the protective pad.

[0013] By adopting the above technical solution, the lower pressure plate provides power to the protective pad, enabling the lower pressure plate to drive the protective pad to move vertically. When the lower pressure plate positions the metal part, the protective pad can protect the metal part and prevent the sharp parts of the metal part from scratching the surface of the lower pressure plate.

[0014] Preferably, a positioning component for positioning the main pallet and the secondary pallet is provided between the secondary pallet and the main pallet;

[0015] The positioning component includes positioning blocks symmetrically slidably disposed on both sides of the surface of the main tray. A spring fixed inside the main tray is provided on the side of the positioning block near the surface of the main tray. The auxiliary tray has symmetrically opened positioning grooves on the side of the surface near the main tray that are adapted to the positioning blocks.

[0016] By adopting the above technical solution, the auxiliary tray rotates 90 degrees clockwise from the vertical position. During the rotation process, the surface of the auxiliary tray close to the main tray presses against the positioning block, causing the positioning block to be compressed into the main tray. The positioning block presses against the spring, causing the spring to deform. When the auxiliary tray rotates to the horizontal position, the surfaces of the auxiliary tray and the main tray are on the same horizontal line, and the positioning groove and the positioning block are in a mutually facing state. The positioning block loses the pressure of the auxiliary tray surface and is ejected into the positioning groove by the spring's rebound force, positioning the main tray and the auxiliary tray and fixing the main tray and the auxiliary tray together.

[0017] Preferably, a load-bearing component for supporting the main pallet and the auxiliary pallet is fixed on the side of the main pallet away from the protrusion.

[0018] The load-bearing assembly includes a load-bearing plate one fixed on the side of the main pallet away from the protrusion, and a load-bearing plate two symmetrically slidably disposed on the side of the main pallet near the surface of the load-bearing plate one.

[0019] By adopting the above technical solution, the main tray and the auxiliary tray can be supported by the bearing plate and the push block, so that the main tray and the auxiliary tray can remain stable during the drying process.

[0020] Preferably, a push rod is fixedly provided on one side of the surface of the second bearing plate and slidably disposed on one side of the surface of the first bearing plate. A push block is fixedly provided on the side of the push rod away from the surface of the second bearing plate and abuts against the surface of the first bearing plate. A through hole is provided on one side of the surfaces of both the first bearing plate and the second bearing plate.

[0021] By adopting the above technical solution, the push block is pushed, which causes the push rod to move, and the push rod causes the second bearing plate to move, thereby adjusting the position of the second bearing plate according to the movement state of the auxiliary pallet.

[0022] Preferably, the push block has a slidably disposed post on the side of the surface away from the first bearing plate, which is inserted into the side of the first bearing plate, and the end of the post away from the first bearing plate is fixedly provided with a pressure block that abuts against the surface of the push block.

[0023] By adopting the above technical solution, the pressure block is pulled to provide power to the pressure block, so that the pressure block is away from the first bearing plate. The pressure block drives the insertion post away from the first bearing plate, so that the insertion post is separated from the surface of the first bearing plate and close to the push block, thereby releasing the limit on the push block.

[0024] Preferably, both protrusion one and protrusion two are made of industrial-grade platinum vulcanized silicone rubber.

[0025] By adopting the above technical solution, protrusion one and protrusion two are made of industrial-grade platinum vulcanized silicone rubber, which enables protrusion one and protrusion two to limit the movement of metal parts of different sizes, and allows the inner surfaces of the main tray and the auxiliary tray to adapt to the irregular surfaces of the metal parts.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. The protrusions 1 and 2 on the main tray and the auxiliary tray can effectively limit the metal parts and prevent them from shifting during the drying process. At the same time, the downward movement of the pressure plate and the cooperation of the protective pad can press down and position the metal parts to ensure that they do not shift during the drying process. This ensures that the spacing between the metal parts is consistent and improves the uniformity and consistency of drying.

[0028] 2. By setting a flip-up secondary tray, when drying small-sized metal parts, the secondary tray can be flipped to a horizontal state, forming a larger placement space with the main tray. The small-sized metal parts are limited by protrusions one and two. When drying large-sized metal parts, the secondary tray can support both ends of the large-sized metal parts, thereby realizing the drying of metal parts of different sizes without replacing equipment or making complex modifications, reducing production costs and improving the drying efficiency of metal parts. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of this application;

[0030] Figure 2 This is a schematic diagram of the initial internal structure of the drying oven body of this application;

[0031] Figure 3 This is a schematic diagram of the initial structural state of the placement of the main component and the placement of the sub-component in this application;

[0032] Figure 4 For this application Figure 3 Enlarged view of point A in the middle;

[0033] Figure 5 This is a cross-sectional structural diagram of the positioning block in this application;

[0034] Figure 6 This is a cross-sectional structural diagram of the drying oven body of this application;

[0035] Figure 7 This is a three-dimensional structural diagram of the main tray and the auxiliary tray of this application;

[0036] Figure 8 This is a schematic diagram of the initial state structure of the carrier component in this application;

[0037] Figure 9 This is a partial three-dimensional structural diagram of the load-bearing component of this application;

[0038] Figure 10 This is a schematic diagram of the final state structure of the carrier component in this application;

[0039] Figure 11 This is a schematic diagram of the final internal structure of the drying oven body in this application.

[0040] Figure label:

[0041] 1. Drying oven body;

[0042] 2. Placement of main components; 21. Main tray; 211. Slide groove one; 212. Protrusion one; 213. Through hole one; 214. Guide groove one; 215. Placement space one; 22. Storage slot; 221. Limiting slot; 222. Limiting plate;

[0043] 3. Placement of secondary components; 31. Secondary tray; 311. Secondary slide groove; 312. Secondary protrusion; 313. Secondary through hole; 314. Positioning groove; 315. Secondary placement space; 316. Secondary guide groove;

[0044] 4. Positioning component; 41. Positioning block; 411. Limiting block; 412. Limiting space; 42. Spring;

[0045] 5. Pressing mechanism; 51. Pressing seat; 511. Slider; 52. Drive block; 53. Screw; 54. Pressing plate; 541. Through hole three; 55. Protective pad; 56. Limiting seat; 561. Guide plate;

[0046] 6. Supporting components; 61. Supporting plate one; 611. Storage space; 612. Through hole four; 613. Activity space; 614. Columnar groove; 62. Push block; 621. Push rod; 622. Supporting plate two; 623. Slot; 63. Pressing block; 631. Insert post. Detailed Implementation

[0047] The following is in conjunction with the appendix Figures 1-11 This application will be described in further detail.

[0048] This application discloses a drying oven for surface treatment of metal parts.

[0049] Reference Figure 1 The drying oven for surface treatment of metal parts includes a drying oven body 1. The drying oven body 1 is a prior art and mature technology. The principle of the drying oven body 1 will not be described in detail. The structural components of the drying oven body 1 (excluding the metal part support assembly) include:

[0050] Enclosure and Insulation System

[0051] The outer shell of the drying oven body is made of 304 stainless steel or Q235 carbon steel (with anti-rust paint coating), providing corrosion resistance and adapting to electrophoretic drying environments (typically 160-220℃). It features a double-layer design with aluminum silicate fiber insulation cotton (50-100mm thick) filling the middle, achieving a thermal conductivity ≤0.04W /

[0052] (m·K), reducing heat loss and lowering the surface temperature of the casing (≤50℃).

[0053] The cabinet door and sealing system adopt a sliding or double-opening door, equipped with a high-temperature resistant silicone sealing strip (temperature resistant 200-250℃) and a metal locking device to ensure the airtightness of the cabinet and prevent heat loss and solvent vapor leakage.

[0054] The drying oven body 1 is equipped with explosion-proof LED lights to provide sufficient brightness for easy observation of the workpiece.

[0055] Heating and temperature control system

[0056] The heating element uses Ni80Cr20 resistance wire, sheathed in 304 stainless steel tubing, with fins welded to the surface to enhance heat dissipation area, achieving a power density of 3-5W / mm². 2 It is suitable for constant temperature drying at 180-220℃ (such as electrophoretic coating curing), and the heating elements are evenly distributed on both sides, top or bottom of the chamber.

[0057] Temperature control and sensing components

[0058] Temperature sensor: Type K thermocouple (measuring range 0-1300℃, accuracy ±1℃), installed in different positions inside the box (such as the upper and lower parts, the central area) to monitor the temperature field in real time.

[0059] Intelligent temperature controller: PID adjustment function, supports segmented heating program (such as preheating-constant temperature-heating stage), temperature control accuracy ±2℃, and can store multiple sets of drying process parameters (such as electrophoretic coating curing 120℃×10min+180℃×30min).

[0060] Hot air circulation system

[0061] The circulating fan uses a high-temperature resistant centrifugal fan (impeller material is stainless steel or aluminum alloy, bearing is equipped with a heat dissipation device), with an air volume of 2000-5000 m³ / h. 3 / h, ensuring an internal air velocity of 0.5-2m / s and achieving temperature uniformity of ±3℃.

[0062] Installation location: Top or side air supply, combined with bottom return air channel, to form a "diagonal circulation" or "up and down circulation" airflow pattern, avoiding local airflow dead zones.

[0063] Air ducts and airflow guiding devices

[0064] Deflector plate: Stainless steel perforated plate (hole diameter 5-8mm), evenly distributed in front of the heating element to disperse hot air to various areas inside the chamber.

[0065] Exhaust vent: Located on the top or rear of the chamber, equipped with an electric damper that automatically adjusts its opening according to the drying stage (e.g., opening 30% to exhaust solvent vapor in the initial stage of electrophoretic drying, and closing it for heat preservation in the later stage).

[0066] Safety and Auxiliary Systems

[0067] Safety protection components

[0068] Over-temperature protection: Independent thermostat + fuse, automatically cuts off heating power when the temperature exceeds the set value by 10-15℃.

[0069] Explosion-proof devices: To address the solvent vapors volatilized during the electrophoresis drying process, the chamber can be equipped with an explosion-proof pressure relief valve (opening pressure 5-10kPa) and a combustible gas detector (detection range 0-100% LEL).

[0070] Leakage protection: Install a leakage circuit breaker with a grounding resistance ≤4Ω to ensure the safety of equipment power supply.

[0071] Control systems and interfaces

[0072] Operation panel: Touch screen or button control, displays parameters such as temperature, time, and fan status, supports remote PLC communication (such as Modbus protocol), and can be connected to factory automation systems.

[0073] Reference Figures 2-11 The drying oven body 1 has a main placement component 2 for placing metal parts inside. The main placement component 2 includes multiple main trays 21 disposed on the inner wall of the drying oven body 1. The two sides of the surface of the main tray 21 are U-shaped to prevent the metal parts from falling out of the interior of the main tray 21. Multiple protrusions 212 for limiting the metal parts are fixed on the inner wall of the main tray 21. Every four protrusions 212 divide the interior of the main tray 21 into multiple independent placement spaces 215. Multiple through holes 213 are opened on the surface of the placement space 215.

[0074] Small metal parts can be placed in the placement space 215 formed by each of four protrusions 212. At the same time, the protrusions 212 limit the position of the metal parts. When large metal parts are placed inside the main tray 21, the large metal parts can be limited by multiple protrusions 212, so that the metal parts can be displaced during the drying process, ensuring that the spacing between each metal part remains consistent.

[0075] Reference Figures 2-11 The main component 2 has two sides of a placement sub-component 3 for expanding the placement space of the metal component. The placement sub-component 3 includes a sub-tray 31 hinged to both sides of the main tray 21. The sub-tray 31 is hinged to both sides of the main tray 21. The inner wall of the sub-tray 31 is fixed with a plurality of protrusions 212 for limiting the metal component. Every four protrusions 212 divide the interior of the sub-tray 31 into a plurality of independent placement spaces 215. The surface of the placement space 215 is provided with a plurality of through holes 213. Both the protrusion 1 212 and the protrusion 2 312 are hemispherical.

[0076] By flipping the secondary tray 31 90 degrees, the placement space can be quickly and flexibly adjusted according to the size of the metal parts, so that both small and large metal parts can be adapted to the drying oven body 1, thereby improving the versatility of the drying oven body 1 for metal parts of different sizes.

[0077] Reference Figures 2-5A positioning component 4 for positioning the main tray 21 and the auxiliary tray 31 is provided between the auxiliary tray 31 and the main tray 21. The positioning component 4 includes positioning blocks 41 symmetrically slidably disposed on both sides of the surface of the main tray 21. A storage groove 22 is symmetrically opened on the surface of the main tray 21 near the positioning blocks 41. The surface of the positioning blocks 41 near the main tray 21 abuts against the inner wall of the storage groove 22, so that the positioning blocks 41 can slide stably into the storage groove 22. Limiting blocks 411 are fixed on both sides of the surface of the positioning blocks 41. Limiting grooves 221 that are adapted to the limiting blocks 411 are opened on both sides of the inner wall of the storage groove 22. The surface of the limiting blocks 411 abuts against the inner wall of the limiting groove 221, so that the limiting blocks 411 can slide stably inside the limiting groove 221.

[0078] A spring 42 is fixedly installed on the side of the positioning block 41 near the main tray 21. The end of the spring 42 away from the positioning block 41 is fixedly installed on the inner wall of the storage groove 22. A limiting plate 222 is symmetrically fixed on the inner wall of the storage groove 22. A limiting space 412 adapted to the limiting plate 222 is symmetrically opened on the side of the positioning block 41 near the positioning block 41. The surface of the limiting plate 222 and the surface of the limiting space 412 are on the same horizontal line, and the length of the limiting plate 222 is the same as the length of the limiting space 412. The end of the positioning block 41 away from the main tray 21 is semi-circular. A positioning groove 314 adapted to the positioning block 41 is symmetrically opened on the side of the auxiliary tray 31 near the main tray 21.

[0079] It should be noted that the calculation formula for spring 42 is: F = kx, where F is the external force acting on spring 42, in N, k is the spring constant of spring 42, in N / m, and x is the deformation of spring 42, in m. The elastic force of spring 42 is then calculated so that it can be used in this application.

[0080] When the secondary tray 31 is rotated 90 degrees clockwise from its vertical position, during the rotation, the surface of the secondary tray 31 near the main tray 21 is pressed by the positioning block 41 away from the arc-shaped surface of the main tray 21, causing the positioning block 41 to be compressed into the storage groove 22. This causes the positioning block 41 to press the spring 42, which deforms. When the secondary tray 31 is rotated to a horizontal position, the surfaces of the secondary tray 31 and the main tray 21 are on the same horizontal line, and the positioning groove 314 and the positioning block 41 are directly opposite each other. The positioning block 41 loses the pressure on the surface of the secondary tray 31 and is ejected into the positioning groove 314 by the rebound force of the spring 42, positioning the main tray 21 and the secondary tray 31 and fixing them together.

[0081] Reference Figures 2-11Both the main tray 21 and the auxiliary tray 31 are provided with a pressing mechanism 5 for positioning metal parts on one side of their surfaces. The pressing mechanism 5 includes a pressing seat 51 slidably disposed on one side of the surfaces of the auxiliary tray 31 and the main tray 21. A slider 511 is symmetrically fixed on one side of the surface of the pressing seat 51. The end of the slider 511 away from the pressing seat 51 is inverted T-shaped. The surface of the main tray 21 near the pressing seat 51 and the surface of the auxiliary tray 31 near the pressing seat 51 are respectively symmetrically provided with a first groove 211 and a second groove 311 that are adapted to the end of the slider 511 away from the pressing seat 51. The surface of the end of the slider 511 away from the pressing seat 51 abuts against the inner wall of the first groove 211 and the second groove 311, so that the slider 511 can slide stably inside the first groove 211 and the second groove 311.

[0082] A screw 53 is threadedly connected to one side of the surface of the lower pressure seat 51. A drive block 52 is fixed to the end of the screw 53 away from the main tray 21. The surface of the drive block 52 away from the screw 53 is triangular. A lower pressure plate 54 is fixed to one side of the surface of the lower pressure seat 51. A limiting seat 56 is fixed to the side of the lower pressure plate 54 away from the lower pressure seat 51. A guide plate 561 is fixed to the middle of one side of the limiting seat 56. The end of the guide plate 561 away from the lower pressure seat 51 is inverted T-shaped. The main tray 21 and the auxiliary tray 31 are respectively provided with guide groove 1 214 and guide groove 2 316 that are adapted to the end of the guide plate 561 away from the lower pressure seat 51. The surface of the end of the guide plate 561 away from the lower pressure seat 51 abuts against the inner wall of guide groove 1 214 and guide groove 2 316, so that the guide plate 561 can slide stably inside guide groove 1 214 and guide groove 2 316.

[0083] It should be noted that when the pressure seat 51 is located at the upper end of the screw 53, the pressure seat 51 and the limit seat 56 are far away from the surfaces of the main tray 21 and the auxiliary tray 31. When the pressure seat 51 is located at the lower end of the screw 53, the end of the pressure seat 51 that is far away from the drive block 52 abuts against the surfaces of the main tray 21 and the auxiliary tray 31, and the surface of the limit seat 56 abuts against the surfaces of the main tray 21 and the auxiliary tray 31.

[0084] The self-locking between the screw 53 and the lower pressure seat 51 depends on the relationship between the helix angle λ and the friction angle φ. The friction angle φ = arctan(f), where f is the friction coefficient of the threaded pair (dry friction between steel and steel threads). When f ≈ 0.1-0.15, the corresponding φ ≈ 5.7°-8.5°.

[0085] When the pitch is 1.5mm and the mean diameter is 10mm, λ=arctan(1.5 / 10π)=2.7°<φ=5.7°, the self-locking effectiveness is proven.

[0086] When λ≤φ, the screw 53 and the lower pressure seat 51 have self-locking property, that is, the axial force cannot drive the threaded pair to rotate automatically, so that the lower pressure seat 51 cannot drive the screw 53 to rotate.

[0087] The rotating drive block 52 provides power to the screw 53, causing the screw 53 to rotate. The screw 53 drives the lower pressure seat 51 to move vertically, and the lower pressure seat 51 drives the lower pressure plate 54 to move vertically, thereby limiting the movement of metal parts at different heights.

[0088] Reference Figures 2-11 A protective pad 55 is fixed on the side of the lower pressure plate 54 away from the drive block 52. The surface of the lower pressure plate 54 and the surface of the protective pad 55 are on the same vertical line. A through hole 541 is opened on one side of the surface of both the lower pressure plate 54 and the protective pad 55.

[0089] The lower pressure plate 54 provides power to the protective pad 55, causing the lower pressure plate 54 to drive the protective pad 55 to move vertically, thereby making the protective pad 55 fit against the surface of the metal part and protecting the lower pressure plate 54.

[0090] Reference Figures 2-11 A support assembly 6 for supporting the main pallet 21 and the auxiliary pallet 31 is fixedly provided on the side of the main pallet 21 away from the protrusion 212. The support assembly 6 includes a support plate 61 fixedly provided on the side of the main pallet 21 away from the protrusion 212. A storage space 611 is symmetrically provided on one side of the surface of the support plate 61. A support plate 622 is slidably provided inside the storage space 611. A push rod 621 is fixedly provided on one side of the surface of the support plate 622. An active space 613 is provided on the side wall of the storage space 611. The surface of the push rod 621 abuts against the inner wall of the active space 613, so that the push rod 621 can slide stably inside the active space 613. A push block 62 is fixedly provided on the side of the push rod 621 away from the surface of the support plate 622, which abuts against the surface of the support plate 61. A through hole 612 is provided on both the inner wall of the storage space 611 and one side of the surface of the support plate 622.

[0091] A slot 623 is provided on the side of the push block 62 away from the support plate 61. A pin 631 is slidably connected inside the slot 623. The surface of the pin 631 abuts against the inner wall of the slot 623, allowing the pin 631 to slide stably inside the slot 623. Multiple cylindrical slots 614 are symmetrically provided on the side of the support plate 61 near the push block 62. Every two cylindrical slots 614 are symmetrical about the movable space 613. The cylindrical slots 614 are connected to the slot 623, allowing the pin 631 to be inserted into the cylindrical slot 614 to limit the push block 62 and prevent the push block 62 from moving arbitrarily. A pressure block 63 is fixed at the end of the pin 631 away from the support plate 61, abutting against the surface of the push block 62.

[0092] It should be noted that when the surfaces of the main tray 21 and the auxiliary tray 31 are on the same horizontal plane, the second support plate 622 is in the open state. When the main tray 21 and the auxiliary tray 31 are in the vertical state, the second support plate 622 retracts into the storage space 611.

[0093] When the push block 62 moves the push rod 621 until the surface of the push rod 621 abuts against the inner wall of the movable space 613, the cylindrical groove 614 and the slot 623 are in a mutually facing state. Pressing the pressure block 63 can make the insert 631 slide inside the slot 623 and make the end of the insert 631 away from the pressure block 63 insert into the cylindrical groove 614, thus limiting the push block 62.

[0094] The top of the support plate 61 is symmetrically provided with insertion slots, and the main tray 21 is symmetrically fixed with insertion blocks that are compatible with the insertion slots on the side of the surface near the support plate 61, so that the main tray 21 can be removed from the support plate 61, making it convenient to replace the main tray 21 and the auxiliary tray 31.

[0095] Pull the pressure block 63 away from the bearing plate 61, so that the pressure block 63 moves away from the bearing plate 61. The pressure block 63 drives the insert 631 away from the bearing plate 61, so that the insert 631 is disengaged from the interior of the cylindrical groove 614, thereby releasing the limit on the push block 62. Push the push block 62, so that the push block 62 drives the push rod 621 to move. The push rod 621 drives the bearing plate 622 to move, thereby adjusting the position of the bearing plate 622 according to the movement state of the auxiliary tray 31.

[0096] It should be added that the drying oven body 1 is an electrophoresis drying oven from Jiangsu Susheng Electrophoresis Equipment Engineering Co., Ltd.

[0097] The main tray 21 and the auxiliary tray 31 are made of high-temperature aluminum alloy. The first protrusion 212, the second protrusion 312 and the protective pad 55 are all made of industrial-grade platinum vulcanized silicone rubber. At the same time, a layer of PTFE release agent is coated on the surface of the first protrusion 212, the second protrusion 312 and the protective pad 55 to further reduce the surface stickiness of the first protrusion 212, the second protrusion 312 and the protective pad 55. The spring 42 is made of stainless steel, the lower pressure plate 54 is made of bakelite, the first bearing plate 61 and the second bearing plate 622 are made of stainless steel, and the push block 62 and the pressure block 63 are made of brass.

[0098] Through hole 1 213 and through hole 2 313 have the same diameter, through hole 3 541 and through hole 4 612 have the same diameter, and the diameters of through hole 1 213 and through hole 2 313 are smaller than the diameters of through hole 3 541 and through hole 4 612.

[0099] In the initial state of this application: the pressure seat 51 is located at the upper end of the screw 53, and the surface of the pressure seat 51 abuts against the surface of the drive block 52 near the screw 53, so that the protective pad 55 is away from the surfaces of the main tray 21 and the auxiliary tray 31.

[0100] The implementation principle of the drying oven for surface treatment of metal parts in this application embodiment is as follows: When drying electrophoretic metal parts, the user first pulls the door of the drying oven body 1 to open the door. When drying small-sized electrophoretic metal parts, the user manually pulls the main tray 21 and the auxiliary tray 31 upwards, so that the insertion block of the main tray 21 near the surface of the support plate 61 disengages from the insertion slot on the surface of the support plate 61, thereby separating the main tray 21 from the support plate 61. The main tray 21 is then removed from the support plate 61 and moved out of the drying oven body 1. The auxiliary tray 31 is also moved out of the drying oven body 1 along with the main tray 21, thus removing the main tray 21 and the auxiliary tray 31 from the drying oven body 1.

[0101] The small-sized electrophoretic metal parts are placed sequentially from the gap between the pressure seat 51, the protective pad 55, the limiting seat 56 and the surface of the main tray 21 into the placement space 215 formed by the four protrusions 212, so that the protrusions 212 and the through holes 213 simultaneously limit the small-sized electrophoretic metal parts.

[0102] When there is no space in the placement space 215 inside the main tray 21 to place a small electrophoretic metal part, the user can manually rotate the secondary tray 31 90 degrees clockwise, gradually changing the secondary tray 31 from a vertical to a horizontal state. During the rotation, the surface of the secondary tray 31 near the main tray 21 is pressed by the arc-shaped surface of the positioning block 41 away from the main tray 21, compressing the positioning block 41 into the storage groove 22. This causes the positioning block 41 to press the spring 42, deforming the spring 42. When the secondary tray 31 is rotated to a horizontal state... At this time, the surfaces of the auxiliary tray 31 and the main tray 21 are on the same horizontal line, and the positioning groove 314 and the positioning block 41 are facing each other. The positioning block 41 loses the pressure on the surface of the auxiliary tray 31, and the spring 42 loses the pressing force of the positioning block 41. As a result, the positioning block 41 is ejected into the positioning groove 314 by the rebound force of the spring 42, so that the surface of the positioning block 41 abuts against the inner wall of the positioning groove 314, thereby positioning the main tray 21 and the auxiliary tray 31 and fixing the main tray 21 and the auxiliary tray 31 together, thereby expanding the placement space of the main tray 21.

[0103] The user manually pulls the pressure block 63 away from the first bearing plate 61, causing the pressure block 63 to move away from the first bearing plate 61. The pressure block 63 moves the insert post 631 away from the first bearing plate 61, disengaging the insert post 631 from the interior of the cylindrical groove 614, thereby releasing the restriction on the push block 62. The user then manually pushes the push block 62, causing the two push blocks 62 to move away from each other. This causes the two push blocks 62 to move away from each other, and the two push rods 621 to move away from each other. The two push rods 621 then move the two second bearing plates 622 away from each other, gradually opening the two second bearing plates 622. When the push rod 621 moves to abut against the inner wall of the movable space 613, the slot 623 and the cylindrical groove 614 are in a mutually facing state. Then, the user presses the pressure block 63 again, so that the pressure block 63 is close to the first support plate 61. The pressure block 63 drives the insertion post 631 to be close to the first support plate 61, so that the insertion post 631 gradually slides into the cylindrical groove 614 inside the slot 623, thereby limiting the push block 62 and preventing the push block 62 from moving. Thus, the position of the second support plate 622 is adjusted according to the state of the auxiliary tray 31.

[0104] The user places small metal parts inside the placement space 315, which consists of four protrusions 312. The protrusions 312 and the through holes 313 limit the position of the small electrophoretic metal parts. After the placement space 315 and the guide groove 214 are filled with small electrophoretic metal parts, the user manually rotates the drive block 52 clockwise to provide power to the screw 53, causing the screw 53 to rotate clockwise. The screw 53 drives the lower pressure seat 51 to move downward, the lower pressure seat 51 drives the lower pressure plate 54 to move downward, and the lower pressure plate 54 drives the protective pad 55 to move downward, thereby positioning the metal parts at different heights and preventing the metal parts from shifting during the drying process.

[0105] After positioning the metal parts, the main pallet 21 is placed back on the first support plate 61, so that the insertion block on one side of the main pallet 21 is reinserted into the insertion slot on one side of the support plate 61 to limit the main pallet 21. At the same time, the surface of the secondary pallet 31 abuts against the surface of the second support plate 622, so that the first support plate 61 and the second support plate 622 support the main pallet 21 and the secondary pallet 31 respectively.

[0106] Close the door and start the drying oven body 1 to dry the metal parts. During the drying process, hot air gradually flows to the surface of the metal parts through through holes 1 213, through holes 2 313, through holes 3 541 and through holes 4 612 to dry the metal parts.

[0107] If drying large metal parts, the steps are the same as above. First, place the large metal parts inside the main tray 21, then flip the secondary tray 31 so that the secondary tray 31 supports both ends of the large metal parts and dries the large metal parts.

[0108] The above are merely optional embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A drying oven for surface treatment of metal pieces, characterized by: The drying oven body (1) includes a main component (2) for placing metal parts inside the drying oven body (1), and secondary components (3) for expanding the space for placing metal parts are provided on both sides of the surface of the main component (2). The main component (2) includes a main tray (21) set on the inner wall of the drying oven body (1). The inner wall of the main tray (21) is fixed with a plurality of protrusions (212) for limiting the metal parts. Every four protrusions (212) divide the interior of the main tray (21) into a plurality of independent placement spaces (215). The surface of the placement space (215) is provided with a plurality of through holes (213). The placement sub-component (3) includes a sub-tray (31) hinged to both sides of the surface of the main tray (21). The inner wall of the sub-tray (31) is fixed with a plurality of protrusions (312) for limiting the metal parts. Every four protrusions (312) divide the interior of the sub-tray (31) into a plurality of independent placement spaces (315). The surface of the placement space (315) is provided with a plurality of through holes (313). A pressing mechanism (5) for positioning the metal parts is provided on one side of the surface of both the main tray (21) and the sub-tray (31).

2. The drying oven for surface treatment of metal pieces according to claim 1, characterized in that: The pressing mechanism (5) includes a pressing seat (51) that is slidably disposed on one side of the surface of the auxiliary tray (31) and the main tray (21). A screw (53) is threadedly connected to one side of the surface of the pressing seat (51). A driving block (52) is fixedly disposed at one end of the screw (53) away from the main tray (21). A pressing plate (54) that is slidably disposed on one side of the surface of the pressing seat (51) is fixedly disposed on one side of the surface of the main tray (21).

3. The drying oven for surface treatment of metal pieces according to claim 2, characterized in that: A protective pad (55) is fixed on the side of the lower pressure plate (54) away from the drive block (52), and a through hole (541) is opened on one side of the surface of both the lower pressure plate (54) and the protective pad (55).

4. The drying oven for surface treatment of metal pieces according to claim 1, characterized in that: A positioning component (4) for positioning the main tray (21) and the secondary tray (31) is provided between the secondary tray (31) and the main tray (21); The positioning component (4) includes positioning blocks (41) symmetrically slidably disposed on both sides of the surface of the main tray (21). A spring (42) fixed inside the main tray (21) is fixed on the side of the positioning block (41) near the surface of the main tray (21). The sub-tray (31) is symmetrically provided with positioning grooves (314) that are adapted to the positioning blocks (41) on the side of the surface of the sub-tray (31) near the surface of the main tray (21).

5. The drying oven for surface treatment of metal pieces according to claim 1, characterized in that: The main pallet (21) has a support component (6) fixed on the side of its surface away from the protrusion (212) for supporting the main pallet (21) and the auxiliary pallet (31); The support assembly (6) includes a support plate one (61) fixed on the side of the main pallet (21) away from the surface of the protrusion one (212), and a support plate two (622) is symmetrically slidably disposed on the side of the support plate one (61) near the surface of the main pallet (21).

6. The drying oven for surface treatment of metal pieces according to claim 5, characterized in that: A push rod (621) is fixedly provided on one side of the surface of the second bearing plate (622) and slidably disposed on one side of the surface of the first bearing plate (61). A push block (62) is fixedly provided on the side of the push rod (621) away from the surface of the second bearing plate (622) and abuts against the surface of the first bearing plate (61). A through hole (612) is provided on one side of the surface of both the first bearing plate (61) and the second bearing plate (622).

7. The drying oven for surface treatment of metal pieces according to claim 6, characterized in that: The push block (62) has a slidably disposed post (631) on the side of the surface away from the first bearing plate (61), which is inserted into the side of the surface of the first bearing plate (61). The end of the post (631) away from the first bearing plate (61) is fixedly provided with a pressure block (63) that abuts against the surface of the push block (62).

8. The drying oven for surface treatment of metal pieces according to claim 1, characterized in that: Both protrusion one (212) and protrusion two (312) are made of industrial-grade platinum vulcanized silicone rubber.

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