Alkaline cleaning device for magnesium alloy surface treatment

Abstract

The utility model provides magnesium alloy surface treatment is used alkaline cleaning device, including cleaning liquid placement structure, the inside of cleaning liquid placement structure is provided with bubble spouts structure, the number of bubble spouts structure is provided with multiple, multiple bubble spouts structure equidistance distribution in the inside of cleaning liquid placement structure. The utility model design is reasonable, through setting up the cleaning liquid placement structure, bubble spouts structure and board material tensile structure mutual cooperation, through setting up multiple equidistance distribution's bubble spouts structure, adjustable board material tensile structure and the cooperation of support wheel and transmission shaft, solved the problem that the cleaning liquid in traditional alkaline cleaning process is unevenly distributed, bubble generation mode is single and board material is easy to deform, has the advantages such as cleaning liquid distribution is even, bubble spouts high -efficient and adjustable, board material fixed stable and avoid deformation or displacement.

Description

Technical Field

[0001] This utility model mainly relates to the field of magnesium alloys, and specifically to an alkaline washing device for magnesium alloy surface treatment. Background Technology

[0002] Magnesium alloys, due to their significant advantages such as low density, high specific strength, good damping and shock absorption, excellent electromagnetic shielding performance, and ease of recycling, are increasingly widely used in aerospace, automotive manufacturing, 3C electronics (computers, communications, consumer electronics), and medical devices. However, magnesium alloys are chemically extremely reactive, and their surfaces readily form loose oxide films, often adhering to contaminants such as residual grease, lubricants, coolants, dust, and fingerprints from the processing. These surface defects and contaminants can severely hinder the effective implementation of subsequent processing steps (such as conversion coating, anodizing, or coating application), leading to problems such as poor coating adhesion, decreased corrosion resistance, and poor appearance, directly affecting the quality and service life of the final product.

[0003] Therefore, rigorous surface pretreatment is essential before any functional surface treatment can be performed on magnesium alloys. Alkali washing is a crucial step in the surface pretreatment of magnesium alloys.

[0004] During the operation of specific embodiments, the inventors discovered the following defects:

[0005] While spraying is a highly efficient cleaning method, improper spraying pressure, angle, or nozzle blockage can result in inadequate cleaning of the magnesium alloy sheet surface.

[0006] It should be noted that the above content falls within the scope of the inventor's technical knowledge. Due to the vast and complex nature of the technical content in this field, the above content of this application does not necessarily constitute prior art. Utility Model Content

[0007] 1. The technical problem to be solved by the utility model:

[0008] This invention provides an alkaline washing device for magnesium alloy surface treatment, which solves the technical problems existing in the background art.

[0009] 2. Technical Solution:

[0010] To achieve the above objectives, the technical solution provided by this utility model is as follows: an alkaline washing device for magnesium alloy surface treatment, comprising a cleaning liquid placement structure, wherein a bubble ejection structure is provided inside the cleaning liquid placement structure, the number of the bubble ejection structures is set to multiple, the multiple bubble ejection structures are evenly distributed inside the cleaning liquid placement structure, a plate stretching structure is provided on both sides of the top of the cleaning liquid placement structure, and a motor is provided on one side of one of the bubble ejection structures.

[0011] Furthermore, the cleaning fluid placement structure includes a placement chamber, with first support wheels on both sides inside the placement chamber, brackets on both sides of the top of the placement chamber, and a second support wheel on the top of the brackets.

[0012] Furthermore, the bubble ejection structure includes two rotating plates, with air pipes provided at the top and bottom between the two rotating plates, and air nozzles opened on the inner side of the air pipes.

[0013] Furthermore, a drive shaft is provided on one side of the rotating plate, the drive shaft is rotatably connected to the inside of the placement chamber, and a meshing gear is provided on one side of the drive shaft, and multiple rotating shafts are connected by meshing gears.

[0014] Furthermore, the sheet metal stretching structure includes a mounting frame and a movable frame. The mounting frame is disposed on both sides of the top of the placement chamber, and a double-ended lead screw is rotatably connected to the top of the mounting frame.

[0015] Furthermore, the movable frame has mating holes at both ends, which are mated with a bidirectional lead screw. The movable frame has a connecting shaft inside, and the connecting shaft has a plate placement groove inside, with the four sides of the plate placement groove being rounded.

[0016] 3. Beneficial effects:

[0017] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0018] This invention solves the problems of uneven cleaning liquid distribution, single bubble generation method, and easy deformation of the plate in traditional alkaline washing processes by setting up a cleaning liquid placement structure, a bubble ejection structure, and a plate stretching structure in combination. It also solves the problems by setting up multiple equally spaced bubble ejection structures, an adjustable plate stretching structure, and the cooperation between support wheels and drive shaft. It has the advantages of uniform cleaning liquid distribution, efficient and adjustable bubble ejection, stable plate fixation, and prevention of deformation or displacement. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a three-dimensional cross-sectional structural diagram of the present invention;

[0021] Figure 3 This is a three-dimensional structural diagram of the sheet metal stretching structure of this utility model;

[0022] Figure 4 This is a three-dimensional structural diagram of the bubble ejection structure of this utility model.

[0023] Figure label:

[0024] 1. Cleaning fluid placement structure; 101. Placement chamber; 102. First support wheel; 103. Bracket; 104. Second support wheel; 2. Bubble ejection structure; 201. Rotating plate; 202. Drive shaft; 203. Meshing gear; 204. Air pipe; 205. Air nozzle; 3. Sheet stretching structure; 301. Mounting bracket; 302. Double-ended lead screw; 303. Moving bracket; 304. Mating hole; 305. Connecting shaft; 306. Plate placement groove. Detailed Implementation

[0025] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the utility model will be more thorough and complete.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "page", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "fixed," "provided with," and "located in" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] Example

[0030] See attached document Figure 1-4 An alkaline washing device for magnesium alloy surface treatment includes a cleaning liquid placement structure, an air bubble ejection structure is provided inside the cleaning liquid placement structure, the number of air bubble ejection structures is set to multiple, the multiple air bubble ejection structures are evenly distributed inside the cleaning liquid placement structure, a plate stretching structure is provided on both sides of the top of the cleaning liquid placement structure, and a motor is provided on one side of one of the air bubble ejection structures.

[0031] The cleaning fluid placement structure refers to the container for holding alkaline cleaning fluid, which can be implemented using a rectangular tank with a corrosion-resistant coating. A continuous cleaning channel is formed by the first and second support wheels. The bubble ejection structure refers to the device that generates uniform bubbles, which is linked by a drive shaft to achieve oscillating coverage. The plate stretching structure refers to the mechanism for fixing the workpiece, which can be implemented using a moving frame driven by a two-way screw. Stress concentration is avoided by using the rounded edge of the plate placement groove. The motor refers to the power drive unit, which can be implemented using a waterproof geared motor. The oscillation frequency of multiple bubble ejection structures is synchronously controlled by meshing gears.

[0032] Specifically, after the alkaline solution is injected into the cleaning fluid placement structure, the motor drives the bubble ejection structure to oscillate periodically, so that the air jet nozzle forms a dynamic coverage area. The magnesium alloy plate is completely immersed in the liquid surface after being fixed by the plate placement groove. The bubble group impacts the surface contaminants from different angles. The oscillating motion eliminates the coverage blind spots of traditional fixed nozzles. The bidirectional screw mechanism automatically adjusts the clamping distance according to the width of the plate to ensure that the plate remains flat under the impact of the bubbles. The opening of the air jet nozzle of the rotating air pipe can change with the oscillation angle to form a gradient cleaning intensity to adapt to areas with different levels of contamination.

[0033] Furthermore, the cleaning fluid placement structure includes a placement chamber, with first support wheels on both sides inside the placement chamber, and supports on both sides of the top of the placement chamber. A second support wheel is located on the top of the supports. When the magnesium alloy sheet is immersed in the cleaning fluid in the placement chamber, the two edges of the sheet contact the first support wheels respectively, limiting the sheet's sinking or lateral displacement through rolling friction. When the sheet is pulled by an external traction device, the second support wheel on the top of the supports contacts the upper surface of the sheet to form rolling support, ensuring the sheet maintains a stable posture during horizontal movement. The upper and lower clamping structure formed by the first and second support wheels constrains the vertical displacement of the sheet, preventing tilting or shaking caused by the flow of cleaning fluid or mechanical vibration.

[0034] Furthermore, the bubble ejection structure includes two rotating plates. Air pipes are located at the top and bottom between the two rotating plates, and air nozzles are opened on the inner side of each air pipe. A drive shaft is located on one side of each rotating plate and is rotatably connected to the interior of the placement chamber. A meshing gear is located on one side of the drive shaft. Multiple rotating shafts are connected by meshing gears. The two rotating plates rotate synchronously under the action of a driving device, causing the air pipes fixed between them to change angle. When the rotating plates are at different rotation angles, the direction of the air nozzles on the inner side of the air pipes changes accordingly, resulting in a dynamic coverage area on the horizontal plane. The air pipes at the top and bottom form a double-layer air network, and bubbles are ejected simultaneously from different heights in the vertical direction, achieving synchronous coverage of the upper and lower surfaces of the board. The structural design of the air nozzles being located on the inner side of the air pipes allows bubbles to diffuse outward from the gaps between the plates, preventing external impurities from directly contacting the air nozzles and causing blockage.

[0035] The drive shaft is fixedly connected to the rotating plate. When an external power drives one of the drive shafts to rotate, the meshing gear on that drive shaft drives the meshing gear of the adjacent drive shaft to rotate synchronously, thereby causing all the rotating plates to rotate at the same angular velocity. Since multiple drive shafts are rigidly connected through meshing gears, the rotation angle and speed of each rotating plate are always consistent, avoiding uneven distribution of bubbles or differences in disturbance intensity in the cleaning fluid due to asynchronous rotation.

[0036] Furthermore, the sheet metal stretching structure includes a mounting frame and a movable frame. The mounting frame is located on both sides of the top of the placement chamber. A double-ended lead screw is rotatably connected to the top of the mounting frame. The movable frame has mating holes at both ends, which cooperate with the double-ended lead screw. A connecting shaft is provided inside the movable frame, and a plate placement groove is provided inside the connecting shaft. The four sides of the plate placement groove are rounded. The mounting frame is fixed to both sides of the top of the placement chamber to form a rigid support. The double-ended lead screw is mounted on the top of the mounting frame through bearings to achieve free rotation. When the double-ended lead screw is driven to rotate by an external power source, the two movable frames move synchronously in opposite directions along the axis of the lead screw, causing the magnesium alloy sheet metal clamped on the movable frame to be stretched symmetrically. During this process, the relative position between the sheet metal surface and the bubble ejection structure is dynamically adjusted to ensure that the impact force of the cleaning fluid evenly covers the sheet metal surface. The connecting shaft inside the movable frame constrains the edge of the sheet metal through the plate placement groove. The rounded groove edge design can avoid deformation of the sheet metal caused by stress concentration.

[0037] The mating hole refers to a through-hole structure with internal threads. Specifically, it can be a trapezoidal or rectangular thread forming a helical pair with a two-way lead screw. The forward and reverse rotation of the lead screw drives the moving frame to move in opposite directions. This structure enables continuous adjustment of the clamping distance.

[0038] A bidirectional lead screw refers to a rotating shaft with two sections of threaded segments with opposite directions of rotation. Specifically, a single lead screw can be machined with left-hand and right-hand threads at both ends, allowing the two moving frames to move closer or further apart synchronously as the lead screw rotates. This structure ensures that the center of the sheet material is always aligned with the cleaning area.

[0039] The connecting shaft refers to the cylindrical support component that runs through the movable frame. Specifically, it can be an alloy steel shaft with a hard chrome-plated surface, and an axially oriented rectangular slot for placing the plates. This structure provides a vertical positioning reference for the plates.

[0040] The board placement groove refers to a guide groove used to accommodate the edges of the board material. Specifically, it can be formed by wire cutting into a rectangular groove with rounded transitions on all four sides, with the groove width slightly larger than the thickness of the board material. This structure eliminates stress concentration on the board material from sharp corners through the contact of the rounded surfaces.

[0041] The rounded corner design refers to the use of rounded corners with a radius of curvature of 0.5-2 mm at the four corners where the inner wall of the plate slot contacts the plate. This can be achieved by using a ball end mill to create a smooth transition surface. This structure transforms the line contact during plate clamping into surface contact.

[0042] Specifically, when the bidirectional lead screw rotates, the thread inside the mating hole and the lead screw generate relative motion, driving the two moving frames on both sides to move synchronously along the lead screw axis, forming an adjustable clamping width. The plate-laying groove inside the connecting shaft contacts the edge of the plate through its rounded transition sides. During clamping, the rounded surface forms surface contact with the plate, dispersing local pressure. Once the plate is clamped, the moving frames maintain a stable clamping force through the lead screw drive, preventing the plate from shifting under the impact of the cleaning fluid flow. Thus, the plate maintains a stable relative position with the bubble ejection structure during alkaline washing, while avoiding surface damage caused by hard contact.

[0043] The above-described embodiments are merely illustrative of certain implementations of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An alkaline washing apparatus for magnesium alloy surface treatment, characterized in that: include A cleaning fluid placement structure is provided inside the cleaning fluid placement structure. The number of bubble ejection structures is set to multiple, and the multiple bubble ejection structures are evenly distributed inside the cleaning fluid placement structure. The top two sides of the cleaning fluid placement structure are provided with plate stretching structures, and a motor is provided on one side of one of the bubble ejection structures. The bubble ejection structure includes two rotating plates. Air pipes are provided at the top and bottom between the two rotating plates. Air nozzles are provided on the inner side of the air pipes. A drive shaft is provided on one side of the rotating plate. The drive shaft is rotatably connected to the inside of the placement chamber. A meshing gear is provided on one side of the drive shaft. Multiple drive shafts are connected by meshing gears.

2. The alkaline washing apparatus for magnesium alloy surface treatment according to claim 1, characterized in that: The cleaning fluid placement structure includes a placement chamber, with first support wheels on both sides inside the placement chamber, brackets on both sides of the top of the placement chamber, and a second support wheel on the top of the brackets.

3. The alkaline washing apparatus for magnesium alloy surface treatment according to claim 1, characterized in that: The sheet metal stretching structure includes a mounting frame and a movable frame. The mounting frame is located on both sides of the top of the placement chamber, and a double-ended lead screw is rotatably connected to the top of the mounting frame.

4. The alkaline washing apparatus for magnesium alloy surface treatment according to claim 3, characterized in that: The movable frame has mating holes at both ends, which are mated with a bidirectional lead screw. The movable frame has a connecting shaft inside, and the connecting shaft has a plate placement groove inside, with the four sides of the plate placement groove being rounded.

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