A fixing device for cleaning workpieces and a test device for cleaning effect of a spray head

Abstract

The utility model discloses a kind of fixing device and test device of spray head cleaning effect of workpiece cleaning, fixing device includes the workpiece installation platform for placing workpiece to be cleaned, the workpiece installation platform is equipped with the fastening component for the side limit of the workpiece to be cleaned a pair of and the block component for the side limit of the workpiece to be cleaned another pair, experimental device includes fixing device, water jet nozzle and the driving component for moving the fixing device. The test device of the utility model, workpiece to be cleaned is fixed using fixing device, prevent workpiece displacement or scattered frame in high-pressure water jet cleaning process, ensure the safety of operation;In addition, driving component drives the fixing device installed with workpiece to be cleaned to move at certain speed, water jet nozzle fixed orientation washes the workpiece to be cleaned in movement, this process does not need manual operation, reduce the influence of manual intervention on workpiece cleaning effect, enhance the objectivity of spray head cleaning effect evaluation.

Description

Technical Field

[0001] This utility model belongs to the field of grinding and polishing technology, and in particular relates to a workpiece fixing device and a testing device. Background Technology

[0002] Abrasive waterjet cleaning is an important method for environmentally friendly descaling of steel strips (plates) due to its green and efficient characteristics, and its application in the steel industry is gradually being promoted. The nozzle is one of the key components of abrasive waterjet cleaning, directly affecting the cleaning effectiveness and efficiency. Therefore, the selection and design of the nozzle plays a crucial role in abrasive waterjet cleaning. Ideally, the steel strip (plate) cleaned by an abrasive waterjet nozzle will have no oxide layer residue and the material removal will be relatively uniform. For different nozzles, the cleaning effect needs to be evaluated from multiple dimensions, including the effective cleaning width, the surface roughness after cleaning, and the material removal rate. Therefore, precise evaluation of the nozzle's cleaning effect is necessary to meet the high surface quality cleaning requirements under different materials and parameters. Currently, there is a lack of relevant testing equipment for evaluating the cleaning effect of nozzles. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the deficiencies and defects mentioned in the background art above, and to provide a workpiece fixing device and a test device for the cleaning effect of the nozzle that facilitates evaluation of the cleaning effect of the nozzle.

[0004] To solve the above-mentioned technical problems, the technical solution proposed by this utility model is as follows:

[0005] A workpiece fixing device includes a workpiece mounting platform for placing the workpiece to be cleaned, the workpiece mounting platform being provided with fastening components for limiting a pair of sides of the workpiece to be cleaned and stop block components for limiting another pair of sides of the workpiece to be cleaned.

[0006] In the aforementioned fixing device, preferably, the stop assembly includes a stop block, and the workpiece mounting platform has a stop block mounting hole, in which the stop block is engaged. This stop assembly has a simple structure, is easy to install and maintain, and can effectively fix and position the workpiece to be cleaned, ensuring the stability of the workpiece during the cleaning process. The number of stops can correspond to the number of transverse workpieces. If only one transverse workpiece is set, one stop block is sufficient; that is, only one stop block is used to position one side of the workpiece to be cleaned.

[0007] In the aforementioned fixing device, preferably, the top surface height of the stop block is not higher than the top surface height of the workpiece to be cleaned. This arrangement effectively prevents abrasive rebound or high-pressure water backflow from affecting the cleaning effect, improving cleaning efficiency and enhancing cleaning quality.

[0008] In the aforementioned fixing device, preferably, the fastening assembly includes a pair of fastening devices movably mounted on the workpiece mounting platform. Each fastening device includes a lateral clamping block and a lateral clamping screw for moving the lateral clamping block. The lateral clamping screw is connected to the lateral clamping block. The workpiece mounting platform has clamping block mounting holes for accommodating the lateral clamping block, and threaded holes for accommodating the lateral clamping screw are provided on both sides of the workpiece mounting platform. The advantages of this fastening assembly design are its compact structure, ease of operation, good fastening effect, and strong applicability. Through the cooperative use of the lateral clamping block and the lateral clamping screw, the lateral clamping screw can be rotated to move the lateral clamping block, achieving rapid and precise fastening or loosening of the workpiece. Simultaneously, the threaded hole design on both sides allows the screw to rotate flexibly, facilitating flexible adjustment and fixing according to the position of the workpiece to be cleaned, ensuring the stability of the workpiece during the cleaning process.

[0009] In the aforementioned fixing device, preferably, the height of the top surface of the lateral clamping block is not higher than the height of the top surface of the workpiece to be cleaned. This arrangement effectively avoids the impact of high-pressure water backflow or abrasive rebound on the cleaning effect on the workpiece, improving cleaning efficiency and quality.

[0010] Preferably, in the above-mentioned fixing device, the workpiece mounting platform has a magnet mounting groove in the middle, and a magnet is installed in the magnet mounting groove. The workpiece to be cleaned is adsorbed onto the magnet. The magnet provides a stable and reliable fixing method for the workpiece to be cleaned, avoiding the risk of the workpiece falling apart when the lateral clamping block is pressed. At the same time, it is easy to operate, and can quickly adsorb and release the workpiece to be cleaned, improving the efficiency and safety of the cleaning operation. The magnet can be a neodymium iron boron magnet.

[0011] As a general technical concept, this utility model also provides a test device for the cleaning effect of a nozzle, including the aforementioned fixing device, a water jet nozzle, and a drive assembly for moving the fixing device. The workpiece to be cleaned is fixed on the fixing device, and the water jet nozzle is positioned above and in front of the moving direction of the fixing device. Using the fixing device to fix the workpiece to be cleaned ensures the stability of the workpiece and prevents it from shifting or falling apart during high-pressure water jet cleaning, thus ensuring operational safety. In addition, the entire cleaning process uses the drive assembly to drive the fixing device with the workpiece to be cleaned to move at a certain speed, while the water jet nozzle is fixed in position to clean the moving workpiece (the position of the water jet nozzle is pre-positioned and fixed above and in front of the moving direction of the fixing device, and the process parameters of the nozzle, such as target distance, cleaning angle, high-pressure water pressure, abrasive concentration, etc., are adjusted). This process requires no manual operation, reducing the impact of human intervention on the objective evaluation of the cleaning effect.

[0012] In the aforementioned test apparatus for nozzle cleaning effect, preferably, the workpiece to be cleaned includes multiple vertical workpieces placed parallel to the forward direction of the fixing device and one horizontal workpiece perpendicular to the forward direction of the fixing device. The multiple vertical workpieces are closely connected and symmetrically distributed along the forward direction of the fixing device. One horizontal workpiece is secured between the end of the vertical workpiece and the stop assembly. The vertical workpieces can be fixed and positioned by lateral clamping blocks and magnets. The horizontal workpiece is secured between the end of the vertical workpiece and the stop assembly to achieve fixed positioning. That is, the lateral clamping blocks fix the workpiece in a direction parallel to the forward direction of the workpiece to be cleaned, the stop assembly fixes the workpiece in a direction perpendicular to the forward direction of the workpiece to be cleaned, and the magnets are used to fix the bottom of the workpiece to be cleaned. Multiple vertical workpieces are placed parallel to the forward direction of the fixed device to facilitate observation and testing of the water jet nozzle's cleaning effect on different parts of the workpiece, allowing for a more accurate evaluation of the water jet nozzle's cleaning effect. In addition, a horizontal workpiece is placed perpendicular to the forward direction of the fixed device to observe the roughness change after the water jet nozzle cleans the continuous surface, further evaluating the water jet nozzle's cleaning effect.

[0013] In the aforementioned test apparatus for nozzle cleaning effect, preferably, rubber pads are provided at the contact points between the fastening assembly and the workpiece to be cleaned, and at the contact points between the stop assembly and the workpiece to be cleaned. This arrangement avoids potential deformation or material removal of the workpiece to be cleaned due to direct contact. The rubber pads help maintain the consistency of the weight of the workpiece to be cleaned, reducing the impact of potential errors on the quality of the workpiece to be cleaned.

[0014] When using abrasive waterjet cleaning to treat workpieces, the cleaning effect of the nozzle directly affects the subsequent processing quality of the product. For different materials and requirements, the cleaned surface must be completely clean and free of oxide layers. Therefore, precise evaluation of the nozzle cleaning effect is necessary to meet the high surface quality cleaning requirements under different materials and parameters. This invention's nozzle cleaning effect testing device is applied in the field of abrasive waterjet cleaning, enabling rapid evaluation of the cleaning effect and nozzle cleaning efficiency for different workpieces. Firstly, it quickly obtains process parameters for industrial applications from the laboratory, reducing testing costs. Secondly, it effectively evaluates the cleaning efficiency of the nozzle during the nozzle development process, providing support for nozzle research and improvement.

[0015] The test device for evaluating the nozzle cleaning effect of this invention is used to first determine the workpiece to be cleaned, obtaining a workpiece suitable for subsequent evaluation of the nozzle cleaning effect. The workpiece to be cleaned is prepared as follows: The workpiece is cut into 2N samples (20mm x 2mm in length x width) using wire cutting (i.e., vertical work), arranged symmetrically on both sides, with N samples on each side. The width of the workpiece should be such that the entire surface can be scanned on an energy dispersive spectroscopy (EDS) device. For each workpiece, the weight m1 before cleaning, the weight m2 after cleaning, the surface oxygen content after cleaning, and the surface roughness are measured. At the end of the vertically arranged workpieces, a transverse workpiece is placed to measure the continuous surface roughness change on the nozzle cleaning section.

[0016] After the workpiece to be cleaned is determined, it is installed in the fixing device. Magnets are installed at the bottom of the fixing device to prevent the workpiece from tipping over. Lateral clamping blocks and stops are used to fix the workpiece, and the height of the lateral clamping blocks and stops is not higher than the upper surface of the workpiece to prevent abrasive rebound and high-pressure water backflow from affecting the cleaning effect. Rubber pads are provided on the contact surfaces of the lateral clamping blocks and stops with the workpiece to prevent direct metal contact and impact on weight after clamping. Threaded holes are opened on both sides of the fixing device, and the lateral clamping blocks are quickly clamped by lateral clamping screws.

[0017] After the workpiece to be cleaned is fixed by the fixing device, the cleaning effect test of the nozzle is carried out. The nozzle is installed in front of and above the workpiece in the direction of movement, with the center line of the nozzle coinciding with the center line of the workpiece. The process parameters of the nozzle are set, including target distance, cleaning angle, high-pressure water pressure, abrasive concentration, etc. After the cleaning system is stable, the drive component is turned on, and the fixing device is moved through the cleaning area of ​​the nozzle at a certain speed to obtain the cleaned surface of the workpiece.

[0018] Finally, the nozzle cleaning effect was evaluated. Different testing methods were combined to assess the residual oxide layer, material removal, and surface roughness after cleaning. The results were analyzed to obtain intuitive feedback. The evaluation indicators for the nozzle cleaning effect experiment included: oxide layer removal rate, material removal rate, and surface roughness.

[0019] Oxide layer removal rate: First, a surface scan of the workpiece to be cleaned is performed at a certain magnification, and the average value A0 is taken. Energy dispersive spectroscopy (EDS) is then used to perform a surface scan of the entire width of the workpiece, symmetrically arranged on both sides, at the same magnification, from left 1 to left N and from right 1 to right N, obtaining the oxygen content A1, A2, A3, A4...A... for each sample. N Oxidation layer removal rate = (A N-A0) / A0. Using the distance from the centerline of the workpiece to be cleaned (the boundary between the left and right workpieces) as the x-axis and the oxide layer removal rate as the y-axis, the oxide layer removal rate of each sample in the workpiece is marked on the coordinate system. Under the same process parameters, the higher the oxide layer removal rate, the higher the nozzle efficiency; the more locations with an oxide layer removal rate of 1, the larger the effective cleaning area of ​​the nozzle. Locations with an oxide layer removal rate < 1 require subsequent nozzle combinations.

[0020] Material removal rate: The weight of the sample in each workpiece is measured by a precision balance. The sample weight before cleaning is m1, and the sample weight after cleaning is m2. The material removal rate is calculated as (m1-m2) / m1. The distance from the center line of the workpiece to be cleaned is plotted on the x-axis, and the material removal rate is plotted on the y-axis. The material removal rate of each sample in the workpiece is marked on the coordinate system. The curve of the material removal rate is analyzed to evaluate the uniformity of the nozzle cleaning.

[0021] Surface roughness: The roughness of the nozzle cleaning section is evaluated by measuring with a surface roughness meter.

[0022] This invention presents a novel experimental device for evaluating the cleaning effect of abrasive waterjet nozzles. For the first time, it proposes a method for rapidly and accurately evaluating the cleaning effect of abrasive waterjet nozzles by processing and setting up the workpiece to be cleaned, combined with the surface quality after cleaning. The device also uses a fixing device to secure the workpiece, effectively preventing it from tipping over, and can completely simulate industrial cleaning processes. The workpiece preparation, cleaning, and evaluation methods of this invention have the following advantages: First, it can determine the width of the oxide layer that the nozzle can completely remove, as well as the content of the oxide layer in other parts of the surface, which can be used to evaluate the cleaning effect of different nozzles under the same process parameters. Second, the cleaning results serve as a reference for superimposed cleaning with multiple nozzles, providing data for subsequent nozzle arrangement. Third, given a specific nozzle, the evaluation method for nozzle cleaning effect can be used to determine the appropriate process parameters for the nozzle.

[0023] Compared with the prior art, the advantages of this utility model are:

[0024] This invention relates to a workpiece fixing device and a test device for the cleaning effect of a water jet nozzle. The fixing device ensures the stability of the workpiece, preventing displacement or disintegration during high-pressure water jet cleaning and ensuring operational safety. Furthermore, the entire cleaning process utilizes a drive assembly to move the fixing device, on which the workpiece is mounted, at a certain speed. The water jet nozzle is positioned in a fixed location to clean the moving workpiece (the nozzle is pre-positioned and fixed above and in front of the moving direction of the fixing device, and its process parameters, such as target distance, cleaning angle, high-pressure water pressure, and abrasive concentration, are adjusted). This process requires no manual operation, reducing the impact of human intervention on the cleaning effect. This test device enhances the objectivity of nozzle cleaning effect evaluation, facilitating the assessment of nozzle cleaning performance and filling a gap in existing technology. Applied to the field of abrasive water jet cleaning, it enables rapid evaluation of the cleaning effect and nozzle cleaning efficiency for different workpieces, providing support for nozzle research and development and improvement. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the fixing device in the embodiment.

[0027] Figure 2 for Figure 1 Top view.

[0028] Figure 3 for Figure 2 A schematic diagram of the AA cross-sectional structure.

[0029] Figure 4 This is a schematic diagram of the test device in the embodiment (the arrow in the figure indicates the forward direction of the fixing device).

[0030] Figure 5 This is a schematic diagram of the arrangement of the workpieces to be cleaned in the embodiment (the multiple workpieces arranged side by side at the top are vertical workpieces, and the workpieces placed horizontally at the bottom are horizontal workpieces).

[0031] Legend

[0032] 01. Workpiece to be cleaned; 1. Workpiece mounting platform; 11. Magnet mounting slot; 12. Stop block mounting hole; 13. Threaded hole; 14. Clamping block mounting hole; 2. Magnet; 3. Fastening assembly; 31. Lateral clamping screw; 32. Lateral clamping block; 4. Stop block; 5. Water jet nozzle; 6. Rubber pad; 7. Drive assembly. Detailed Implementation

[0033] To facilitate understanding of this utility model, it will be described more comprehensively and in detail below with reference to the accompanying drawings and preferred embodiments. However, the scope of protection of this utility model is not limited to the following specific embodiments.

[0034] It should be noted that when a component is described as being "fixed to, attached to, connected to or connected to" another component, it can be directly fixed to, attached to, connected to or connected to the other component, or it can be indirectly fixed to, attached to, connected to or connected to the other component through other intermediate connectors.

[0035] Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by those skilled in the art. The technical terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the scope of protection of this invention.

[0036] Unless otherwise specified, all raw materials, reagents, instruments and equipment used in this invention can be purchased from the market or prepared by existing methods.

[0037] Example:

[0038] like Figures 1-3 As shown, the workpiece fixing device of this embodiment includes a workpiece mounting platform 1 for placing the workpiece 01 to be cleaned. The workpiece mounting platform 1 is provided with a fastening assembly 3 for limiting a pair of sides of the workpiece 01 to be cleaned and a stop block assembly for limiting another pair of sides of the workpiece 01 to be cleaned.

[0039] In this embodiment, the stop assembly includes a stop 4 (only one is used in this embodiment), and the workpiece mounting table 1 has a stop mounting hole 12, in which the stop 4 is engaged.

[0040] In this embodiment, the top surface height of the stop 4 is not higher than the top surface height of the workpiece 01 to be cleaned.

[0041] In this embodiment, the fastening assembly 3 includes a pair of fastening devices movably mounted on the workpiece mounting table 1. The fastening devices include a lateral clamping block 32 and a lateral clamping screw 31 for driving the lateral clamping block 32 to move. The lateral clamping screw 31 and the lateral clamping block 32 are connected. The workpiece mounting table 1 is provided with a clamping block mounting hole 14 for accommodating the lateral clamping block 32. Threaded holes 13 for accommodating the lateral clamping screw 31 are provided on both sides of the workpiece mounting table 1.

[0042] In this embodiment, the height of the top surface of the lateral clamping block 32 is not higher than the height of the top surface of the workpiece 01 to be cleaned.

[0043] In this embodiment, a magnet mounting groove 11 is provided in the middle of the workpiece mounting platform 1, and a magnet 2 is installed in the magnet mounting groove 11. The workpiece 01 to be cleaned is adsorbed onto the magnet 2. The magnet 2 can be a neodymium iron boron magnet.

[0044] like Figure 4 As shown, the test apparatus for the nozzle cleaning effect in this embodiment includes the aforementioned fixing device, a water jet nozzle 5, and a drive assembly 7 for moving the fixing device. The workpiece 01 to be cleaned is fixed on the fixing device, and the water jet nozzle 5 is positioned above and in front of the fixing device in its forward direction. The fixing device is placed flat on the drive assembly 7, and the drive assembly 7 drives the fixing device to move horizontally at a certain speed. The specific structure of the drive assembly 7 is not limited, as long as it can achieve the function of this embodiment.

[0045] In this embodiment, the workpiece 01 to be cleaned includes multiple vertical workpieces placed parallel to the forward direction of the fixing device and one horizontal workpiece perpendicular to the forward direction of the fixing device. The multiple vertical workpieces are closely connected and symmetrically distributed along the forward direction of the fixing device. The horizontal workpiece is positioned between the end of the vertical workpiece and the stop assembly. Figure 5 As shown, the vertical workpiece is a sample with a length * width of 20mm * 2mm, and there are 2N pieces. They are symmetrically distributed along the forward direction of the fixing device and are clamped and fixed by the lateral clamping block 32. A horizontal workpiece is placed at the end of the vertical workpiece, with a size of 4Nmm * 2mm, and is fixed by the stop block 4.

[0046] In this embodiment, rubber pads 6 are provided at the junction of the fastening component 3 and the workpiece 01 to be cleaned, and at the junction of the stop component and the workpiece 01 to be cleaned.

[0047] In this embodiment, when the workpiece 01 to be cleaned is fixed, the workpiece 01 to be cleaned is first placed in sequence so that it is attracted to the magnet 2. The stop block 4 is then inserted into the stop block mounting hole 12 to fix the bottom end of the workpiece 01 to be cleaned (inserted outside the horizontal workpiece). Then, the lateral clamping screws 31 on both sides are rotated so that the lateral clamping blocks 32 connected to them are pressed tightly against both sides of the workpiece 01 to be cleaned (rubber pads 6 are laid at the junction of the stop block 4 and the workpiece, as well as at the junction of the lateral clamping blocks 32 and the workpiece).

[0048] In this embodiment, when cleaning the workpiece 01 to be cleaned, the fixing device on which the workpiece 01 to be cleaned is installed is placed on the drive assembly 7. The position and process parameters of the water jet nozzle 5 are adjusted in advance. The drive assembly 7 is turned on to drive the fixing device to move forward in the horizontal direction at a certain speed. At the same time, the water jet nozzle 5 is turned on to clean the workpiece. During operation, the water jet nozzle 5 is set in front of and above the moving direction of the fixing device, and the horizontal workpiece is arranged at the end away from the moving direction.

[0049] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A fixing device for cleaning workpieces, characterized in that, It includes a workpiece mounting table (1) for placing the workpiece (01) to be cleaned, and the workpiece mounting table (1) is provided with a fastening assembly (3) for limiting a pair of sides of the workpiece (01) to be cleaned and a stop assembly for limiting another pair of sides of the workpiece (01) to be cleaned.

2. The fixing device according to claim 1, characterized in that, The stop assembly includes a stop (4), and the workpiece mounting table (1) has a stop mounting hole (12), and the stop (4) is engaged in the stop mounting hole (12).

3. The fixing device according to claim 2, characterized in that, The height of the top surface of the stop (4) is not higher than the height of the top surface of the workpiece (01) to be cleaned.

4. The fixing device according to claim 1, characterized in that, The fastening assembly (3) includes a pair of fastening devices movably mounted on the workpiece mounting table (1). The fastening device includes a lateral clamping block (32) and a lateral clamping screw (31) for driving the lateral clamping block (32) to move. The lateral clamping screw (31) and the lateral clamping block (32) are connected. The workpiece mounting table (1) is provided with a clamping block mounting hole (14) for accommodating the lateral clamping block (32). The workpiece mounting table (1) is provided with threaded holes (13) on both sides for accommodating the lateral clamping screw (31).

5. The fixing device according to claim 4, characterized in that, The height of the top surface of the lateral clamping block (32) is not higher than the height of the top surface of the workpiece (01) to be cleaned.

6. The fixing device according to claim 1, characterized in that, The workpiece mounting platform (1) is provided with a magnet mounting groove (11) in the middle, and a magnet (2) is installed in the magnet mounting groove (11). The workpiece (01) to be cleaned is attached to the magnet (2).

7. A test apparatus for the cleaning effect of a nozzle, characterized in that, The fixing device according to any one of claims 1-6 further includes a water jet nozzle (5) and a drive assembly (7) for moving the fixing device, wherein the workpiece (01) to be cleaned is fixed on the fixing device, and the water jet nozzle (5) is disposed in front of and above the fixing device in the forward direction.

8. The testing apparatus for the nozzle cleaning effect according to claim 7, characterized in that, The workpiece to be cleaned (01) includes multiple vertical workpieces placed parallel to the forward direction of the fixing device and a horizontal workpiece perpendicular to the forward direction of the fixing device. The multiple vertical workpieces are closely connected and symmetrically distributed along the forward direction of the fixing device. A horizontal workpiece is stuck between the end of the vertical workpiece and the stop assembly.

9. The testing apparatus for the nozzle cleaning effect according to claim 7, characterized in that, Rubber pads (6) are provided at the junction of the fastening assembly (3) and the workpiece to be cleaned (01), and at the junction of the stop assembly and the workpiece to be cleaned (01).

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