Slit spraying and sand planting process in precise grinding material preparation

Abstract

The invention relates to a slit spraying and sand planting process in preparation of a precise grinding material, which comprises the following steps of: mounting a cleaned and coarsened base material on a base material rotating and vibrating mechanism in a sand blasting box, and driving a gluing mechanism and a sand blasting mechanism to carry out primer coating and sand spraying on the surface of the base material respectively through a telescopic control mechanism; the gluing mechanism comprises a scraping plate, a glue storage barrel, a conveying pipe and a leakage-proof structure, the sand blasting mechanism comprises a slit nozzle and a stirring box, and a base material is driven by a second servo motor to rotate and vibrates under the action of a high-frequency motor; according to the process, the uniformity of gluing and sand blasting is improved through the composite action of rotation and vibration, the adaptive capacity to different base materials and sand grain parameters is enhanced through a precise regulation and control mechanism, the machining precision is improved through a quantitative glue supply structure and a slit type injection system, the adhesive curing efficiency and the surface cleanliness are improved by combining hot air and a brushing and sweeping procedure, and the product quality is improved. And the machining consistency and the automation level of grinding material preparation are integrally improved.

Description

Technical Field

[0001] The present invention relates to the technical field of surface treatment, and particularly to a slit spraying and sand implanting process in the preparation of precision grinding materials. Background Art

[0002] In the process of preparing grinding materials, it is usually necessary to uniformly apply a binder on the surface of a substrate and implant abrasive particles to obtain good surface adhesion and abrasive distribution effects. Especially in grinding products used in the field of high-precision machining, factors such as the uniformity of the primer layer, the embedding depth of abrasive grains, and the distribution density directly affect the grinding performance and product stability. Therefore, in the current precision grinding material preparation process, the sand implanting process, as a key link, has been widely studied and valued.

[0003] In the prior art, manual or semi-automatic methods are mostly used for primer coating and abrasive spraying. For example, glue coating is carried out by brushing, roller coating or ordinary spraying methods, and then simple sandblasting devices are used to attach abrasives to the surface of the glue layer. However, due to the various shapes and sizes of the substrates, the coating thickness is uneven, and there are phenomena of glue flowing or missing coating at the edges. At the same time, the distribution of abrasive grains is often affected by unstable air flow, inconsistent sandblasting angles, etc. and is not uniform enough. In addition, in the existing equipment, the substrates are usually in a static or single rotation state, lacking a vibration assistance mechanism, resulting in the difficulty for the sprayed abrasive grains to fully spread or embed into the primer, affecting the subsequent curing effect and product performance.

[0004] In practical applications, there are also the following technical problems: First, the glue coating mechanism and the sandblasting mechanism lack precise adjustable structures, making it difficult to flexibly adjust operating parameters according to different substrate materials, coating viscosities or abrasive grain sizes; second, the glue liquid coating and abrasive spraying cannot be integrated into a linkage operation, requiring multiple manual interventions, which reduces the production efficiency; third, there is a lack of a dynamic adjustment mechanism for the spraying process, and the distance or pressure from the substrate surface cannot be adjusted in real time during the glue coating and sandblasting processes, affecting the stability of the application effect; fourth, there is no effective post-treatment structure, resulting in a large amount of glue residue after coating and unstable attachment of abrasive grains after spraying, requiring additional manual cleaning and drying, further increasing the complexity of the process. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a slit spraying and sand implanting process in the preparation of precision grinding materials, which can achieve automatic control, has high-frequency vibration assistance, synchronously adjusts the glue coating and sandblasting parameters, and can complete high-consistency glue coating and uniform sand implanting operations in the same device, so as to overcome the problems of non-uniformity, low efficiency, poor adaptability, etc. in the existing process and improve the preparation quality and production efficiency of precision grinding materials.

[0006] To achieve the above objectives, the present invention is realized through the following technical solutions: A slit spraying sand implanting process in the preparation of precision abrasive materials comprises the following steps: cleaning and roughening a substrate and then installing it on a substrate rotating vibration mechanism installed in a sandblasting box; The gluing mechanism is controlled to approach the substrate through the telescopic control mechanism on one side of the sandblasting box to apply the primer to the surface of the substrate and smooth it; The sandblasting mechanism is controlled to approach the substrate by a telescopic control mechanism on the other side of the sandblasting box. The distance between the nozzle of the sandblasting mechanism and the substrate is between 100-200 mm, and the spraying pressure is between 0.2-0.5 MPa. During the sandblasting process, the substrate is rotated by the substrate rotating vibration mechanism while always maintaining high-frequency vibration. The spraying time is controlled within 3-5 minutes, and the substrate is rotated at least twice to disperse the sandblasted particles. Use a hot air gun to evenly heat the sprayed surface to accelerate the curing of the adhesive; Clean the surface with a soft-bristled brush.

[0007] Furthermore, side panels are provided on both sides of the sandblasting box, a sealed door is hinged on the front side of the sandblasting box, a funnel is provided at the bottom of the sandblasting box, a recovery mechanism is connected to the bottom of the sandblasting box, a mesh plate is fixed inside the sandblasting box, and the substrate rotation and vibration mechanism is installed on the rear side of the upper surface of the mesh plate by bolts.

[0008] Furthermore, telescopic control mechanisms are installed inside the side panels on both sides, and track bars are symmetrically fixed horizontally inside the side panels. The telescopic control mechanism includes a control cylinder fixed on the rear side of the inner wall of the side panel and a moving block sliding on the surface of the two track bars, and the moving block is vertically arranged.

[0009] Furthermore, a bidirectional screw is vertically rotatedly installed on the surface of the moving block, a first servo motor is fixed on the top of the moving block, the top of the bidirectional screw is installed on the output end of the first servo motor, and slides are symmetrically screwed on the surface of the bidirectional screw. The two slides are respectively screwed on different thread surfaces of the bidirectional screw, and the back of the slide is tightly attached to the surface of the moving block.

[0010] Furthermore, the two ends of the slide are hinged with a first connecting rod, and the ends of the two first connecting rods facing away from the slide are hinged on the mounting seat, and the mounting seat is vertically arranged.

[0011] Furthermore, the glue coating mechanism includes a scraper fixed on the surface of the mounting seat and a glue storage cylinder placed on the outside of the side plate. The scraper is arranged at an angle to the surface of the substrate. The scraper is provided with an inclined surface on the side close to the substrate. Anti-leakage plates are symmetrically provided on both sides of the inclined surface. A delivery pipe is connected between the back of the scraper and the glue storage cylinder. The surface of the inclined surface is evenly provided with glue outlet holes, and multiple glue outlet holes are connected to the delivery pipe.

[0012] Further, the sandblasting mechanism includes a slit nozzle fixed to the end of the mounting base and a mixing tank disposed outside the side plate, and the slit nozzle is at the same height as the rotation axis of the substrate.

[0013] Further, the substrate rotation and vibration mechanism includes a fixed table fixed on the surface of the mesh plate. A chute is provided on the surface of the fixed table. A slider is slidably installed inside the chute. A second servo motor is provided on the back of the slider. A fixing bolt is installed at the output end of the second servo motor. The fixing bolt penetrates through the slider. The substrate is installed on the fixing bolt through a nut, and the substrate is placed on the front side of the fixed table.

[0014] Further, a high-frequency motor is fixed below the back of the fixed table. An eccentric block is installed at the output end of the high-frequency motor. A second connecting rod is hinged on the surface of the eccentric block, and the end of the second connecting rod away from the eccentric block is hinged on the slider.

[0015] The present invention provides a slit spraying and sand embedding process in the preparation of precision grinding materials. It has the following beneficial effects: By arranging a substrate rotation and vibration mechanism in the sandblasting box and combining the cooperation of the second servo motor and the high-frequency motor, the substrate realizes synchronous rotation and high-frequency vibration during the glue coating and sandblasting processes, effectively solving the technical problems in the prior art that the substrate is stationary or only makes a single rotational movement, resulting in uneven distribution of the base glue and difficult full spreading of the abrasive; the high-frequency vibration promotes the uniform embedding of sand grains into the glue layer, improving the spraying uniformity and bonding strength, thereby enhancing the stability and service life of the grinding products.

[0016] Through the coordinated action of the telescopic control mechanism and the track bar, high-precision linear adjustment of the glue coating mechanism and the sandblasting mechanism inside the sandblasting box is achieved. In particular, the control cylinder, the moving block, the bidirectional screw and the sliding seat structure form a linkage adjustment mechanism, enabling the scraper and the slit nozzle to accurately approach or move away from the substrate according to different substrate sizes and sand grain characteristics, solving the problems in the prior art of poor mechanism adjustment ability and inability to adapt to different working conditions, and enhancing the adaptability and operation flexibility of the equipment.

[0017] By arranging a glue coating mechanism composed of a scraper, a glue storage cylinder, a delivery pump and a leak-proof structure, etc., it ensures that the glue liquid is released quantitatively, continuously and evenly onto the surface of the substrate. Combined with the synchronous rotation of the substrate and the inclined surface design of the glue coating mechanism, it can significantly avoid the problems of uneven coating thickness, edge leakage or glue flow in the traditional manual or simple roller coating method, and improve the stability of the base glue layer and the overall processing quality.

[0018] By setting up a sandblasting mechanism composed of a slit nozzle and a mixing tank, the structure of the slit nozzle optimizes the sandblasting direction and flow control. The internal continuous stirring of the mixing tank prevents sand grains from depositing or caking, effectively solving the problems of unstable spraying paths and uneven sand grain distribution density in traditional sandblasting equipment. The nozzle is arranged at the same height as the substrate, combined with precisely controlled spraying distance and pressure range, further improving the spraying quality and ensuring the uniform embedding effect of abrasives on the substrate surface.

[0019] By setting up a hot air gun and a soft brush after the sandblasting process, rapid air drying of the substrate surface and removal of residual impurities are achieved, solving the problems of long glue drying time, poor sand grain adhesion, and low manual cleaning efficiency due to the lack of post-treatment devices in the existing process, and improving the automation degree and production efficiency of the entire process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front view structural schematic diagram of the present invention; Figure 2 It is a three-dimensional structural schematic diagram of the present invention; Figure 3 It is a schematic diagram of the installation structure of the telescopic control and sandblasting mechanism of the present invention; Figure 4 It is a schematic diagram of the installation structure of the telescopic control and glue application mechanism of the present invention; Figure 5 It is a schematic diagram of the installation structure of the glue application mechanism of the present invention; Figure 6 It is a schematic diagram of the installation structure of the substrate rotation and vibration mechanism of the present invention; Figure 7 For the present invention Figure 6 rear three-dimensional structural schematic diagram; Figure 8 It is a rear view structural schematic diagram of the substrate rotation and vibration mechanism of the present invention.

[0021] Among them, 1. Sandblasting box; 11. Side plate; 12. Sealing door; 13. Mesh plate; 14. Recycling mechanism; 15. Track bar; 2. Telescopic control mechanism; 21. Control cylinder; 22. Moving block; 23. Bidirectional screw; 24. Slide seat; 25. First servo motor; 26. First connecting rod; 27. Mounting seat; 3. Glue application mechanism; 31. Scraper; 32. Glue storage cylinder; 33. Delivery pipe; 34. Leak-proof plate; 35. Inclined plane; 36. Glue outlet hole; 4. Sandblasting mechanism; 41. Slit nozzle; 42. Mixing tank; 5. Substrate rotation and vibration mechanism; 51. Fixed table; 52. Slide groove; 53. Slide block; 54. Second servo motor; 55. Fixed bolt; 56. High-frequency motor; 57. Eccentric block; 58. Second connecting rod. Detailed implementation mode

[0022] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative work belong to the scope of protection of the present invention. Embodiment

[0023] Refer to Figures 1-8 A slit spraying and sand implanting process in the preparation of a precision grinding material includes the following steps: After cleaning and roughening the substrate, it is installed on the substrate rotating and vibrating mechanism 5 inside the sandblasting box 1; the substrate is in a continuous high-frequency vibration state driven by the high-frequency motor 56, and the fixing bolt 55 installed on the slider 53 is used to stabilize the substrate, and it is driven by the second servo motor 54 to rotate to form a compound operation mode; the telescopic control mechanism 2 on one side inside the sandblasting box 1 controls the glue coating mechanism 3 to approach the substrate to apply and scrape the base glue on the surface of the substrate; a plurality of glue outlet holes 36 opened on the inclined surface 35 of the scraper 31 cooperate with the glue storage cylinder 32 and the conveying pipe 33 to accurately and evenly convey the glue liquid to the surface of the substrate, and the leakage prevention plates 34 on both sides prevent the glue liquid from overflowing laterally, thereby improving the uniformity and adhesion of the coating; the telescopic control mechanism 2 on the other side inside the sandblasting box 1 controls the sandblasting mechanism 4 to approach the substrate. The sandblasting mechanism 4 includes a slit nozzle 41 arranged at the same height as the rotation axis of the substrate, which is connected to the mixing box 42 for transporting abrasive; the distance between the nozzle of the sandblasting mechanism 4 and the substrate is between 100-200 mm, and the spraying pressure is between 0.2-0.5 MPa. During the sandblasting process, the substrate rotating and vibrating mechanism 5 drives the substrate to rotate while always maintaining high-frequency vibration, and the spraying time is controlled within 3-5 minutes, and the substrate rotates at least two weeks to disperse the sandblasting particles; the hot air gun installed below the end of the mounting seat 27 is used to uniformly heat the sprayed substrate to accelerate the curing of the adhesive, and finally the excess sand grains and floating glue on the surface of the substrate are cleaned with a soft brush.

[0024] Refer to Figures 1-4, on both sides of the sandblasting box 1, there are side plates 11 provided. The side plates 11 are used to carry the telescopic control mechanism 2 and the connecting track bars 15 to realize the guiding and sliding operation of the gluing mechanism 3 and the sandblasting mechanism 4; on the front side of the sandblasting box 1, there is a sealed door 12 hinged. The sealed door 12 is used to enclose the spraying operation environment to prevent sand particles from flying or glue from volatilizing; the bottom of the sandblasting box 1 is set as a funnel-shaped structure to facilitate the natural falling of particulate matter; the bottom of the sandblasting box 1 is connected with a recovery mechanism 14. The recovery mechanism 14 can uniformly recover and process the residual glue and sand materials sprayed down to improve the utilization rate of raw materials; inside the sandblasting box 1, there is a bearing structure mesh plate 13 fixed. The mesh plate 13 is used to provide a stable support platform for installing the substrate rotation and vibration mechanism 5. The substrate rotation and vibration mechanism 5 is installed on the upper surface rear side of the mesh plate 13 through bolts to realize the coordinated work of the fixing and vibration functions.

[0025] Refer to Figures 1-4 , inside both side plates 11, there is a telescopic control mechanism 2 installed. The structure of the telescopic control mechanism 2 is used to realize the precise adjustment of the positions of the scraper 31 and the slit nozzle 41; symmetrically and horizontally fixed inside the side plates 11 are track bars 15. The track bars 15 serve as sliding guiding components to limit the movement of the moving block 22 along a set trajectory to ensure stable and reliable position adjustment; the telescopic control mechanism 2 includes a control cylinder 21 fixed on the rear side inner wall of the side plate 11 and a moving block 22 sliding on the surfaces of the two track bars 15. The moving block 22 is arranged in the vertical direction and is connected with the piston rod of the control cylinder 21 to form a guiding propulsion mechanism to ensure stable movement and rapid response during sliding.

[0026] Refer to Figure 3 , on the surface of the moving block 22, there is a bidirectional screw 23 rotatably installed vertically. The bidirectional screw 23 has a symmetric threaded structure in the middle and can simultaneously drive the sliders 24 in two directions to move synchronously and in opposite directions; at the top of the moving block 22, there is a first servo motor 25 fixed. The first servo motor 25 drives the bidirectional screw 23 to rotate through the output shaft. The two threaded directions of the bidirectional screw 23 are opposite and respectively correspond to the matching internal threads of the sliders 24; the back of the slider 24 is closely attached to the surface of the moving block 22 and forms a stable guiding and sliding connection structure with the track bar 15 through the slider limiting structure, thus ensuring more precise linear reciprocating adjustment of the mounting seat 27.

[0027] Refer to Figures 3-5 , at the ends of the two sliders 24, there is a first connecting rod 26 hinged. The first connecting rod 26 plays a role in connecting the slider 24 and the mounting seat 27, enabling the mounting seat 27 to make an inclined approach or separation adjustment during bidirectional sliding; at the ends of the two first connecting rods 26 away from the sliders 24, they are both hinged on the mounting seat 27. The mounting seat 27 is vertically arranged and serves as the bearing and supporting component of the gluing mechanism 3 and the sandblasting mechanism 4, used for stable control during the overall propulsion and position adjustment process to ensure precise spraying and reliable repeat positioning.

[0028] Refer toFigures 3-5 , the gluing mechanism 3 includes a squeegee 31 fixed on the surface of the mounting base 27 and a glue storage cylinder 32 placed outside the side plate 11. A glue liquid delivery pump is arranged inside the glue storage cylinder 32, and the delivery pump is connected to a delivery pipe 33 to achieve quantitative glue supply; the squeegee 31 is arranged obliquely to the surface of the base material, and an inclined surface 35 is arranged on the side of the squeegee 31 close to the base material. The inclined surface 35 is an arc structure to adapt to the curvature characteristics of the rotating base material. Anti-leakage plates 34 are symmetrically arranged on both sides of the inclined surface 35 to block the lateral overflow of the glue liquid; the back of the squeegee 31 is connected to the glue storage cylinder 32 through the delivery pipe 33, and the internal channel of the delivery pipe 33 communicates with a plurality of glue outlet holes 36 on the surface of the inclined surface 35, ensuring that the glue liquid is evenly and continuously coated on the surface while the base material rotates, thereby effectively improving the uniformity and stability of the bottom glue coating.

[0029] Refer to Figures 1-4 , the sandblasting mechanism 4 includes a slit nozzle 41 fixed at the end of the mounting base 27 and a mixing tank 42 placed outside the side plate 11. A mixing component is arranged inside the mixing tank 42 to keep the sand grains evenly distributed and prevent the phenomena of particle size stratification or nozzle blockage; the slit nozzle 41 has a horizontal narrow slit structure to control the spraying direction and flow rate, so that the sand grains are stably ejected in a bundle and accurately cover the surface of the rotating base material. The slit nozzle 41 is arranged at the same height as the rotation axis of the base material, so as to ensure that the spraying path is consistent with the surface of the base material in contact, effectively avoiding problems such as local accumulation or spraying dead angles.

[0030] Refer to Figures 6-8 , the base material rotation and vibration mechanism 5 includes a fixed table 51 fixed on the surface of the mesh plate 13. The fixed table 51 is an integral casting structure, and a linear chute 52 is opened on the table surface. A slider 53 is slidably installed inside the chute 52, and a fixing bolt 55 for installing the base material is arranged on the slider 53. The fixing bolt 55 passes through the slider 53 and locks the base material through a nut; a second servo motor 54 is installed on the back of the slider 53, and the output shaft of the second servo motor 54 drives the fixing bolt 55 to achieve the uniform rotation of the base material to cooperate with the vibration device to complete the composite movement; the front side of the fixed table 51 is the base material installation area, and the base material is coaxially aligned with the fixing bolt 55 through its rotation axis to ensure the processing stability.

[0031] Refer to Figures 6-8 , a high-frequency motor 56 is fixed below the back of the fixed table 51. An eccentric block 57 is installed at the output end of the high-frequency motor 56. A second connecting rod 58 is hinged on the outer surface of the eccentric block 57. One end of the second connecting rod 58 away from the eccentric block 57 is hinged on the slider 53. The eccentric rotation movement of the eccentric block 57 drives the second connecting rod 58 to swing reciprocally, realizing the high-frequency reciprocating movement of the slider 53 inside the chute 52, thereby forming a high-frequency vibration of the base material. This structure effectively improves the bonding strength between the sand grains and the bottom glue, optimizes the spraying particle distribution, and enhances the uniformity and adhesion of the finished product. Embodiment

[0032] Refer toFigures 6-8 , in this embodiment, the rotation and high-frequency vibration of the substrate are realized through the substrate rotation and vibration mechanism 5 arranged inside the sandblasting box 1. The fixed table 51 is precision machined from Q235 steel, and the tabletop is processed with a chute 52. A slider 53 is slidably installed in the chute 52; a second servo motor 54 (model: Panasonic A6 series 200W servo motor) is installed on the back of the slider 53, and the motor drives the fixing bolt 55 to rotate through a coupling. The external thread in the middle of the bolt body is used to lock the substrate with a nut; a high-frequency motor 56 (model: ZD-MJ type 12V high-speed vibration motor) is installed below the fixed table 51, and its output end is connected to an eccentric block 57. The outer circumference of the eccentric block 57 is hinged to a second connecting rod 58, and the other end of the second connecting rod 58 is hinged to the slider 53; the high-frequency motor 56 drives the eccentric block 57 to rotate, causing the slider 53 to vibrate reciprocally, forming a composite movement of substrate rotation and high-frequency vibration, effectively improving the embedding uniformity of sand grains on the surface of the base glue.

[0033] Comparison case: In the traditional structure, the substrate is driven to rotate by an ordinary stepper motor, lacking a vibration assistance mechanism. During the sandblasting process, local accumulation of sand grains is likely to occur due to gravity settlement or surface tension, resulting in uneven sand planting; after adopting the composite mechanism structure in this embodiment, the sprayed sand grains can be quickly flattened and evenly distributed under the vibration assistance, and the sand planting effect is significantly improved. Embodiment

[0034] Refer to Figures 1-4 , Figure 3 , in this embodiment, the multi-directional precise adjustment of the glue application mechanism 3 and the sandblasting mechanism 4 is realized by setting the telescopic control mechanism 2; the telescopic control mechanism 2 includes a control cylinder 21 (model: SMCM GPM50-200) installed on the rear side of the inner wall of the side plate 11. The control cylinder 21 pushes the moving block 22 to linearly slide along the track bar 15 through a piston rod; a bidirectional screw 23 is vertically installed on the back of the moving block 22, and the top of the bidirectional screw 23 is connected to a first servo motor 25 (model: Delta ASDA-B2-400W) for controlling the bidirectional rotation of the screw, thereby driving the two sliding seats 24 to move towards or away from each other; the ends of the two sliding seats 24 are connected to the mounting seat 27 through a first connecting rod 26, and the mounting seat 27 then drives the scraper 31 or the slit nozzle 41 to approach or move away from the substrate, realizing high-precision adjustment.

[0035] Comparison case: In traditional spraying equipment, the adjustment of the mechanism relies on manual operation or a single-axis propulsion structure, with slow adjustment response and poor positioning accuracy, making it difficult to adapt to the changes in different substrates and particle characteristics; after introducing the multi-axis linkage and servo drive mechanism in this embodiment, not only is the adjustment response fast, but the positioning accuracy can be controlled within ±0.1 mm, effectively improving the process adaptability of the whole machine. Embodiment

[0036] Refer to Figures 3-5, in this embodiment, a glue storage cylinder 32 (a 304 stainless steel pressurized storage tank) is provided in the glue coating mechanism 3. An air pressure transfer pump (model: Nitto LA-80) is equipped inside the glue storage cylinder 32, which is connected to the back of the squeegee 31 through a transfer pipe 33. The squeegee 31 is made of aluminum alloy as a whole, and an inclined surface 35 is provided on the front side in an inclined manner. Uniform glue outlet holes 36 with a diameter of Φ0.8mm are opened on the surface of the inclined surface 35, and anti-leakage plates 34 are symmetrically installed on the left and right sides. During the application process, the substrate rotates and keeps the lower edge of the inclined surface 35 at the same height as the rotation axis of the substrate. The glue is stably released through the glue outlet holes 36, and the glue is evenly scraped and coated on the surface of the substrate by combining the inclined structure and the rotation mode of the squeegee, forming a primer film layer with a uniform thickness.

[0037] Comparison case: In the traditional roller coating or spraying method, the glue ejection is unstable, prone to wire drawing or forming a glue accumulation layer, and there is a risk of missed coating at the edge part. After adopting the structure of this embodiment, the thickness error of the glue layer is controlled within ±10μm, the surface flatness is significantly improved, and the subsequent sand planting uniformity is enhanced. Embodiment

[0038] Refer to Figures 1-4 , in this embodiment, the sandblasting mechanism 4 includes a slit nozzle 41 (precision laser cutting with a slit width of 1.2mm made of stainless steel) and a stirring tank 42. A magnetic stirrer (model: IKA RW20) is provided inside the stirring tank 42 to ensure that the sand grains remain evenly suspended before the spraying process and prevent particle size stratification. The slit nozzle 41 is pressurized by a high-pressure air source, and the air pressure is controlled at about 0.3MPa, so that the sand grains are stably ejected in the form of a wire bundle, accurately aligned with the front surface of the substrate, and uniformly covered by combining rotation and vibration. The nozzle is at the same height as the axis of the substrate to ensure a stable and consistent sand ejection direction and prevent spraying deviation.

[0039] Comparison case: Common nozzles have a round or diffused structure. During the sandblasting process, there are problems such as inconsistent sand ejection angles, too large or too narrow coverage widths, resulting in local sand grain aggregation or insufficient coverage. After adopting the narrow slit nozzle in this embodiment, the sandblasting range is more controllable, the particle distribution density is more stable, and the overall uniformity is increased by more than about 20%. Embodiment

[0040] Refer to Figures 1-5 , in this embodiment, a hot air gun (model: LEISTER HOTWIND) is provided at the lower end of the mounting base 27 to quickly heat the surface of the substrate after spraying. The temperature control is set at 60 - 80°C to accelerate the surface curing of the primer. At the same time, a soft brush mechanism (the brush hairs are made of anti-static nylon material with a thickness of 0.12mm) is provided beside the hot air gun. The soft brush slowly rotates in contact with the surface of the substrate through a synchronous transmission mechanism to clean off the floating sand and unadhered particles, ensuring the cleanliness of the finished product surface and improving the process yield.

[0041] Comparative case: In the structure without a hot air and cleaning module, the adhesive layer often needs to be air-dried naturally for 4 to 6 hours, and the sand grains remaining on the surface need to be manually brushed off, resulting in low efficiency and poor stability. In this embodiment, rapid hot air curing and automatic cleaning are integrated, and the overall curing time is shortened to within 15 minutes, with the cleaning efficiency increased by more than 3 times.

[0042] Working principle: First, adjust the pressures of the glue applying mechanism 3 and the sand blasting mechanism 4 according to the size of the substrate, the coating, and the particle size of the sand grains. Open the sealing door 12 to install the substrate on the surface of the fixing bolt 55 and lock it tightly with a nut. Start the second servo motor 54 to drive the substrate to rotate evenly. At the same time, start the high-frequency motor 56 to drive the eccentric block 57 to rotate around the output axis, and then drive the slider 53 to perform high-frequency reciprocating vibration inside the chute 52 through the connecting rod 58. At this time, the substrate vibrates at high frequency during rotation to level the base glue on the coating surface and the ejected sand grains. After the substrate is installed, start the first servo motor 25 to control the rotation of the bidirectional screw 23, and then drive the two sliding seats 24 to move synchronously and reversely through different thread surfaces. When the two sliding seats 24 approach each other, the mounting seat 27 can be controlled to approach the substrate rotation vibration mechanism 5, and vice versa, to control the positions of the scraper 31 and the slit nozzle 41. Start the control cylinder 21 to control the moving block 22 to move along the track of the track bar 15, so as to control the distances between the scraper 31 and the slit nozzle 41 and the front surface of the substrate. After the substrate is installed, first control the scraper 31 to approach the substrate through the telescopic control mechanism 2, and adjust the lower edge of the inclined surface 35 to be close to the substrate. Start the delivery pump inside the glue storage cylinder 32 to inject glue liquid into the scraper 31 through the delivery pipe 33. The glue liquid flows out through multiple glue outlet holes 36 and is placed in the space between the inclined surface 35 and the substrate surface. Through the rotation of the substrate, the glue liquid is evenly applied to the substrate surface. The anti-leakage plates 34 on both sides can prevent the glue liquid from overflowing through the sides. When applying the glue liquid, ensure that the slider 53 is placed at the outermost end of the chute 52 and keep the lower edge of the inclined surface 35 at the same height as the rotation axis of the substrate. Then withdraw the scraper 31, move the slit nozzle 41 on the other side to the front side of the substrate, and evenly spray the sand grains inside the mixing tank 42 onto the base surface through high-pressure air. During the sand blasting process, the substrate vibrates at high frequency to promote the more uniform distribution of the abrasive on the substrate surface. The rotation speed of the high-frequency motor 56 can be adjusted through the controller to control the vibration frequency, so as to realize automatic glue application and sand blasting work. The rotation speed of the substrate corresponds to the amount of glue removed during glue application and the pressure during sand blasting. Corresponding hot air guns and soft brushes can be installed below the end of the mounting block 27 to perform air drying and cleaning work after sand blasting.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A slit spraying and sand implanting process in the preparation of precision grinding materials, characterized in that: The method comprises the following steps: cleaning and roughening the substrate and then installing the substrate on a substrate rotating vibration mechanism (5) inside a sandblasting box (1); The gluing mechanism (3) is controlled to approach the substrate by a telescopic control mechanism (2) on one side of the interior of the sandblasting box (1), so as to apply the primer to the surface of the substrate and smooth it; The sandblasting mechanism (4) is controlled to approach the substrate by a telescopic control mechanism (2) on the other side of the sandblasting box (1), the distance between the nozzle of the sandblasting mechanism (4) and the substrate is between 100-200 mm, the spraying pressure is between 0.2-0.5 MPa, and during the sandblasting process, the substrate is driven to rotate by the substrate rotating vibration mechanism (5) while always maintaining high-frequency vibration. The spraying time is controlled within 3-5 minutes, and the substrate is rotated for at least two weeks to disperse the sandblasted particles; Use a hot air gun to evenly heat the sprayed surface to accelerate the curing of the adhesive; Clean the surface with a soft-bristled brush.

2. The slit spraying and sand planting process in the preparation of a precision grinding material according to claim 1, wherein: The sandblasting box (1) is provided with side panels (11) on both sides, a sealing door (12) is hinged on the front side of the sandblasting box (1), a funnel is provided at the bottom of the sandblasting box (1), a recovery mechanism (14) is connected to the bottom of the sandblasting box (1), a mesh plate (13) is fixed inside the sandblasting box (1), and the substrate rotation and vibration mechanism (5) is installed on the rear side of the upper surface of the mesh plate (13) by bolts.

3. The slit spraying and sand planting process in the preparation of a precision grinding material according to claim 2, characterized in that: A telescopic control mechanism (2) is installed inside the side panels (11) on both sides. Track bars (15) are symmetrically fixed horizontally inside the side panels (11). The telescopic control mechanism (2) includes a control cylinder (21) fixed to the rear side of the inner wall of the side panels (11) and a moving block (22) sliding on the surface of the two track bars (15). The moving block (22) is vertically arranged.

4. A slit spraying and sand implanting process in the preparation of a precision grinding material according to claim 3, characterized in that: A bidirectional screw (23) is vertically rotatably mounted on the surface of the moving block (22), a first servo motor (25) is fixed on the top of the moving block (22), the top of the bidirectional screw (23) is mounted on the output end of the first servo motor (25), a slide (24) is symmetrically screwed on the surface of the bidirectional screw (23), two slides (24) are respectively screwed on different thread surfaces of the bidirectional screw (23), and the back of the slide (24) is tightly attached to the surface of the moving block (22).

5. The slit spraying and sand planting process in the preparation of a precision grinding material according to claim 4, characterized in that: The ends of the two slides (24) are both hinged with a first connecting rod (26), and the ends of the two first connecting rods (26) facing away from the slide (24) are both hinged on a mounting seat (27), and the mounting seat (27) is vertically arranged.

6. The slit spraying and sand planting process in the preparation of a precision grinding material according to claim 5, characterized in that: The glue coating mechanism (3) comprises a scraper (31) fixed on the surface of the mounting seat (27) and a glue storage cylinder (32) placed on the outside of the side plate (11), the scraper (31) is arranged obliquely with respect to the surface of the substrate, a slope (35) is provided on the side of the scraper (31) close to the substrate, and leak-proof plates (34) are symmetrically provided on both sides of the slope (35), a delivery pipe (33) is connected between the back of the scraper (31) and the glue storage cylinder (32), and glue outlet holes (36) are evenly opened on the surface of the slope (35), and a plurality of glue outlet holes (36) are all connected to the delivery pipe (33).

7. The slit spraying and sand planting process in the preparation of a precision grinding material according to claim 5, characterized in that: The sandblasting mechanism (4) includes a slit nozzle (41) fixed to the end of the mounting base (27) and a mixing tank (42) placed outside the side plate (11), and the slit nozzle (41) is at the same height as the rotation axis of the substrate.

8. The slit spraying and sand implanting process in the preparation of a precision grinding material according to claim 2, characterized in that: The substrate rotation and vibration mechanism (5) includes a fixed table (51) fixed to the surface of the mesh plate (13). A chute (52) is formed on the surface of the fixed table (51). A slider (53) is slidably installed inside the chute (52). A second servo motor (54) is provided on the back of the slider (53). A fixing bolt (55) is installed at the output end of the second servo motor (54). The fixing bolt (55) penetrates through the slider (53). The substrate is installed on the fixing bolt (55) through a nut, and the substrate is placed on the front side of the fixed table (51).

9. A slit spraying and sand implanting process in the preparation of a precision grinding material according to claim 8, characterized in that: A high-frequency motor (56) is fixed below the back of the fixed table (51). An eccentric block (57) is installed at the output end of the high-frequency motor (56). A second connecting rod (58) is hinged to the surface of the eccentric block (57). One end of the second connecting rod (58) away from the eccentric block (57) is hinged to the slider (53).

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