Efficient polishing method for aluminum material

Abstract

The invention relates to an efficient polishing method for aluminum products, which belongs to the technical field of bathroom aluminum products, and comprises the following steps: dividing a surface to be polished into a first surface area, a second surface area and a third surface area covering the whole surface, and respectively setting pre-polishing and fine polishing parameters with different strengths; in the pre-polishing stage, the machining track of the third surface area is in lap joint with the first surface area and the second surface area so as to weaken the machining difference at the boundary, and in the fine polishing stage, the first surface area is subjected to high brightness at the rotating speed of 1700 r / min-1800 r / min of a main polishing head which is set through speed increase of a belt speed change mechanism; and meanwhile, lower contact strength or shorter contact time or an intermittent mode is adopted for the second surface area to restrain heat generated by friction to avoid burning loss, so that high brightness and efficiency of the plane are guaranteed, the risk of burning loss of the edge is reduced, and connecting marks and gloss mutation between the plane and the edge are eliminated.

Description

Technical Field

[0001] This invention belongs to the field of bathroom aluminum material technology, specifically relating to an efficient polishing method for aluminum materials. Background Technology

[0002] In the surface treatment of aluminum bathroom products, in order to obtain a high gloss appearance and improve processing efficiency, mechanical polishing methods are usually used to pre-polish and fine polish the aluminum surface. Currently, it is generally achieved by using a drive motor to drive the polishing spindle and polishing head to rotate, and by using a pulley-belt transmission method to achieve power transmission or speed change, so that polishing media such as sandpaper wheels or sanding belts can rotate at high speed to grind and polish the workpiece surface.

[0003] However, in high-gloss polishing scenarios for bathroom aluminum materials, the workpiece surface to be polished typically includes large visible planes as well as easily burned areas such as corners, edges, and thin walls. The polishing process is a friction-grinding coupled process; with a constant contact pressure, the higher the relative linear velocity of the polishing head, the more significant the interface frictional heat generation. Edges or thin-walled areas, due to their smaller local contact area, more concentrated heat, and poorer heat dissipation, are more prone to abnormal temperature rises, leading to defects such as burns, discoloration, matte finish, or abrasive blockage. Existing methods, if increasing the overall rotation speed to pursue gloss, easily result in these defects in easily burned areas. To avoid burns... Reducing the overall rotation speed decreases the efficiency of removing fine tool marks or extrusion marks in planar areas, slows down the improvement of gloss, and forces a longer processing cycle, making it difficult to balance efficiency and appearance consistency. In addition, even if empirical measures such as speed reduction or pressure reduction are taken for edges or thin-walled areas to prevent burn-in, the lack of clear area division rules and the lack of areas and overlap treatments for the transition between planar and edge areas can easily lead to abrupt changes in material removal, texture direction, and gloss between the two areas. This results in visible seams, gloss bands, or color difference bands at the junction, further reducing the overall appearance consistency. Summary of the Invention

[0004] To address the aforementioned problems in the existing technology, this invention provides an efficient polishing method for aluminum materials. This method solves the problem that in the production scenario of high-gloss polishing of bathroom aluminum materials, the surface to be polished simultaneously has a main plane and easily burnable edges, thin walls, and corners, which easily leads to insufficient efficiency and brightness in the plane area. Furthermore, there are also problems such as abrupt changes in gloss and inconsistencies in appearance between the plane and the edges.

[0005] The objective of this invention can be achieved through the following technical solutions: A method for high-efficiency polishing of aluminum materials includes the following steps: S1: Pre-treat and clamp the aluminum workpiece to be polished; S2: Define the visible planar area of ​​the main body as the first surface area, define the easily burnable areas at corners, edges, thin walls, or small rounded corner radii as the second surface area, and define the transition area located between the first and second surface areas to connect the process differences between the two as the third surface area. Based on the characteristics of the three surface areas, the corresponding process parameters are set for each area. At the same time, a polishing device including a pre-polishing head and a main polishing head is provided. The main polishing head is connected to the drive motor through a belt speed change mechanism. By setting the speed increase transmission ratio of the belt speed change mechanism, the working speed of the main polishing head is limited to 1700 r / min to 1800 r / min. S3: The pre-polishing head is used to pre-polish the first surface area, the second surface area and the third surface area respectively. The pre-polishing parameter intensity of the first surface area is higher than that of the second surface area, and the pre-polishing parameter intensity of the third surface area is between that of the first surface area and the second surface area, so that the third surface area overlaps with the first surface area and the second surface area on the processing trajectory. S4: Monitor the temperature rise and surface condition of the second surface region, and adjust the pre-polishing and fine polishing parameters of the second surface region according to the monitoring results. At the same time, adjust the transition parameters of the third surface region in a coordinated manner so that the third surface region always maintains a transitional relationship between the first and second surface regions. S5: Fine polishing is performed under the condition that the main polishing head speed is 1700~1800 r / min. High-gloss fine polishing is performed on the first surface area, fine polishing to suppress frictional heat generation is performed on the second surface area and its fine polishing parameters are lower than those of the first surface area, and transitional fine polishing between the first and second surface areas is performed on the third surface area, and it overlaps with the first and second surface areas to reduce the gloss difference at the boundary of the area. S6: After polishing, clean and inspect the appearance, and adjust the process parameters of the corresponding area according to the area where the defect is located. Repeat the corresponding operations in S3 to S5 until the appearance quality requirements are met.

[0006] As a further aspect of the present invention, the pretreatment in step S1 includes degreasing and dust removal cleaning of the aluminum workpiece, and the clamping and positioning includes positioning and clamping the aluminum workpiece on the polishing fixture so that the surface to be polished is in a processing posture that can be stably contacted by the polishing head.

[0007] As a further aspect of the present invention, the regional design in step S2 includes: dividing the strip-shaped range that is less than a first distance threshold from the outer contour edge of the workpiece, the part with a corner radius less than a radius threshold, and the part with a wall thickness less than a thickness threshold into a second surface region; dividing the strip-shaped range that is between the first distance threshold and the second distance threshold from the outer contour edge into a third surface region; and dividing the remaining part into a first surface region.

[0008] As a further embodiment of the present invention, the pre-polishing parameters of the three regions in step S3 satisfy the following: the pre-polishing rotation speed of the first surface region is n1, the pre-polishing rotation speed of the second surface region is n2, and the pre-polishing rotation speed of the third surface region is n3, and n1 ≥ n3 > n2; the pre-polishing contact pressure of the first surface region is P1, the pre-polishing contact pressure of the second surface region is P2, and the pre-polishing contact pressure of the third surface region is P3, and P1 ≥ P3 > P2.

[0009] As a further embodiment of the present invention, n1 is 1000-1600 r / min, n2 is 600-1200 r / min, n3 is 0.80n1-0.98n1, the pre-polishing head uses a sanding belt or sandpaper wheel as the pre-polishing medium, and the pre-polishing overlap width between the third surface area and the first and second surface areas is 2 mm-10 mm.

[0010] As a further embodiment of the present invention, the temperature rise monitoring in step S4 adopts infrared temperature measurement. When the surface temperature of the second surface area exceeds a preset threshold, the control is performed. The preset threshold is 50℃~80℃.

[0011] As a further aspect of the present invention, the regulation includes one or more of the following: reducing the contact pressure of the second surface region, shortening the single contact time, reducing the feed rate, increasing the proportion of intermittent contact, and applying cooling to the second surface region, and simultaneously adjusting the parameters of the third surface region to maintain its transition relationship between the first surface region and the second surface region.

[0012] As a further embodiment of the present invention, in step S5, the fine polishing of the main polishing head uses a cloth wheel, and polishing wax or polishing paste is applied to the polishing wheel. The fine polishing of the second surface area uses an intermittent contact method, which includes an alternating cycle of contact time and departure time. The type of polishing wheel and the type of polishing wax or polishing paste used in the third surface area are the same as those used in the first surface area.

[0013] As a further aspect of the present invention, the step S2 of setting the main sling head speed through the belt speed change mechanism includes: selecting the diameter D1 of the driving pulley and the diameter D2 of the driven pulley according to the output speed A of the drive motor, so that the main sling head speed B satisfies B = A × D1 / D2, and B is 1700 r / min to 1800 r / min, and reducing the speed fluctuation caused by slippage by replacing at least one pulley and adjusting the belt tension.

[0014] As a further aspect of the present invention, the overlapping process of the third surface region in step S5 includes: the fine polishing trajectory of the third surface region overlaps with the first surface region and the second surface region respectively, and after the fine polishing of the second surface region is completed, the third surface region is subjected to at least one re-transition fine polishing adjacent to the second surface region to eliminate the joint marks and gloss abrupt changes at the region boundary.

[0015] The beneficial effects of this invention are as follows: This invention divides the surface to be polished into a first surface region, a second surface region, and a third surface region covering the entire surface. Different pre-polishing and fine polishing parameters are set for each region. During the pre-polishing stage, the processing trajectory of the third surface region overlaps with that of the first and second surface regions to reduce processing differences at the boundary. During the fine polishing stage, the main polishing head speed is set to 1700 r / min to 1800 r / min via a belt-driven speed-changing mechanism to achieve high gloss on the first surface region. At the same time, the second surface region is treated with lower contact intensity, shorter contact time, or intermittent methods to suppress frictional heat generation and avoid burn-off. The third surface region is then finely polished with parameters between the two, overlapping with adjacent regions. Furthermore, when monitoring the temperature rise or surface condition of the second surface region and adjusting the parameters, the parameters of the third surface region are simultaneously adjusted to maintain the transition relationship. This ensures high gloss and efficiency on the surface while reducing the risk of edge burn-off and eliminating seams and abrupt changes in gloss between the surface and the edge. Attached Figure Description

[0016] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is a flowchart of the high-efficiency polishing method for aluminum materials according to the present invention. Detailed Implementation

[0018] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0019] Please see Figure 1 As shown, this embodiment provides a method for high-efficiency polishing of aluminum materials, including the following steps: S1: Pre-treat and clamp the aluminum workpiece to be polished; S2: Define the visible planar area of ​​the main body as the first surface area, define the easily burnable areas at corners, edges, thin walls or small rounded corner radii as the second surface area, and define the transition area between the first surface area and the second surface area to connect the process differences between the two as the third surface area. Based on the characteristics of the three surface areas, the corresponding process parameters are set for each area. At the same time, a polishing device including a pre-polishing head and a main polishing head is provided. The main polishing head is connected to the drive motor through a belt speed change mechanism. By setting the speed increase transmission ratio of the belt speed change mechanism, the working speed of the main polishing head is limited to 1700 r / min to 1800 r / min. S3: A pre-polishing head is used to pre-polish the first surface area, the second surface area, and the third surface area respectively. The pre-polishing parameter strength of the first surface area is higher than that of the second surface area, and the pre-polishing parameter strength of the third surface area is between that of the first surface area and the second surface area. The third surface area overlaps with the first surface area and the second surface area on the processing trajectory. S4: Monitor the temperature rise and surface condition of the second surface region, and adjust the pre-polishing and fine polishing parameters of the second surface region according to the monitoring results. At the same time, adjust the transition parameters of the third surface region in a coordinated manner so that the third surface region always maintains a transitional relationship between the first and second surface regions. S5: Fine polishing is performed under the condition that the main polishing head speed is 1700~1800 r / min. High-gloss fine polishing is performed on the first surface area, fine polishing to suppress frictional heat generation is performed on the second surface area and its fine polishing parameters are lower than those of the first surface area, and transitional fine polishing between the first and second surface areas is performed on the third surface area, and it overlaps with the first and second surface areas to reduce the gloss difference at the boundary of the area. S6: After polishing, clean and inspect the appearance, and adjust the process parameters of the corresponding area according to the area where the defect is located. Repeat the corresponding operations in S3 to S5 until the appearance quality requirements are met.

[0020] Currently, bathroom aluminum materials have extremely high requirements for high gloss and consistency in their visual appearance. However, the workpiece geometry and heat dissipation conditions are naturally uneven. The main surface allows for higher removal efficiency and higher linear speed to improve gloss, while edges, thin walls, and small rounded corners are more prone to abnormal temperature rise at high linear speeds due to small contact area, concentrated heat, and poor heat dissipation, leading to burn-off or haziness. At the same time, reducing speed or pressure only at the edges will create a processing difference zone at the junction of the surface and the edge. Based on this situation, a regional approach is adopted, with a third transition zone set as a parameter buffer layer. Overlapping processing eliminates boundary abrupt changes. At the same time, the key speed window for fine polishing of the main polishing head is quantified to 1700 r / min to 1800 r / min and increased by belt speed change, so that the achievement of high gloss no longer depends on experience trial polishing. Combined with monitoring and control of the easily burnable area and linkage adjustment of the transition zone, the final benefit is that the risk of edge burn-off is significantly reduced without sacrificing the high gloss and efficiency of the surface, and the process reproducibility and overall appearance consistency between batches and between personnel are improved.

[0021] To address the challenges in high-gloss polishing of bathroom aluminum materials in existing technologies, where the surface to be polished simultaneously contains a main planar surface and easily burned edges, thin walls, and corners, resulting in insufficient gloss and inconsistent appearance between the planar and edge areas, this embodiment divides the surface to be polished into a first surface area (main planar surface), a second surface area (corners, edges, and thin walls prone to burning), and a third surface area (the transition zone between the two). Different pre-polishing and fine-polishing parameters are set for each surface area. During the pre-polishing stage, the processing trajectory of the third surface area overlaps with that of the first and second surface areas to reduce processing differences at the boundaries. During the fine-polishing stage, a main polishing head speed of 1700-1800 r / min is used, accelerated by a belt-driven speed-changing mechanism. The first surface area achieves high gloss with a certain r / min, while the second surface area is treated with lower contact intensity, shorter contact time, or intermittent methods to suppress frictional heat generation and prevent burn-off. The third surface area is then finely polished with parameters between the two, overlapping with adjacent areas. Furthermore, when monitoring the temperature rise or surface condition of the second surface area and adjusting the parameters, the parameters of the third surface area are simultaneously adjusted to maintain the transition relationship. This ensures high gloss and efficiency on the plane while reducing the risk of edge burn-off and eliminating seams and gloss abrupt changes between the plane and the edge, thus improving the overall appearance consistency and reproducibility.

[0022] In high-gloss polishing of bathroom aluminum materials, when the main polishing head operates at 1700 r / min to 1800 r / min, residual oil, dust, or fine particles from before polishing on the workpiece surface can easily cause clogging of the polishing wheel or abrasive and scratches from embedded hard particles. Furthermore, unstable clamping and positioning can lead to fluctuations in contact pressure and angle over time, resulting in inconsistent material removal in the same area. This can cause uneven gloss, ripples, or edge overheating, leading to quality fluctuations. To avoid this problem, in one embodiment, the pretreatment in step S1 includes degreasing and dust removal of the aluminum workpiece. Clamping and positioning involves positioning and clamping the aluminum workpiece on the polishing fixture, ensuring the surface to be polished is in a stable contact position with the polishing head. This results in a cleaner contact interface, more controllable friction, and more stable contact pressure and posture during pre-polishing or fine polishing. This design reduces scratches, clogging, and uneven gloss caused by contamination and clamping fluctuations, improves yield and consistency under high-speed fine polishing conditions, and pre-solidifies controllable input conditions, reducing unpredictable interference from subsequent zone parameter control.

[0023] However, in mass production, different operators can easily have inconsistent subjective definitions of edges, transitions, and planes. A definition that is too narrow can mistake easily burned edges for planes and process them with harsher parameters, leading to burn-in. Conversely, a definition that is too wide can mistake efficiently processed planes for edges, reducing efficiency. Furthermore, if the transition zone is not defined stably and repeatably, the process differences between planes and edges cannot be uniformly buffered, making the junction more prone to seams and gloss bands, resulting in poor batch appearance consistency. Therefore, [further details needed]. In one embodiment, the zoning design in step S2 includes: dividing the strip-shaped range less than a first distance threshold from the outer contour edge of the workpiece, the part with a corner radius less than a radius threshold, and the part with a wall thickness less than a thickness threshold into a second surface region; dividing the strip-shaped range between the first and second distance thresholds from the outer contour edge into a third surface region; and dividing the remaining part into a first surface region. Objective geometric criteria such as the distance threshold from the outer contour edge, the corner radius threshold, and the wall thickness threshold are used to define the second and third surface regions, and the remaining part is the first surface region to ensure that the union of the three covers the entire surface. The advantage of this design is that it transforms the zoning from experience-based judgment into quantifiable rules, making the region identification consistent for different batches and different personnel, ensuring that the subsequent zoning parameters truly fall on the correct object, and reducing the risk of burn damage, inefficiency, and seam marks from the source.

[0024] In practice, if the pre-polishing speed and pressure of the three regions do not form a clear gradient relationship, two types of problems may occur: First, if the parameters of the second surface region are not low enough, it will still burn due to heat concentration; second, if the parameters of the third surface region are too close to those of the first or second, the transition buffer effect is insufficient, and the difference in material removal between the plane and the edge will be concentrated at the junction, forming obvious texture abruptness or gloss abruptness. In one embodiment, the pre-polishing parameters of the three regions in step S3 satisfy: the pre-polishing speed of the first surface region is n1, the pre-polishing speed of the second surface region is n2, and the pre-polishing speed of the third surface region is n3, and n1 ≥ n3 > n2; the pre-polishing contact pressure of the first surface region is P1, the pre-polishing contact pressure of the second surface region is P2, and the pre-polishing contact pressure of the third surface region is P3, and P1 ≥ P3 > P2. Here, it is specified that n1, n2, n3 and P1, P2, P3 satisfy n1 ≥ n3 > n2 and P1 ≥ P3 > P2. The constraint of P2 is equivalent to giving a gradient with strong plane, weak edge, and moderate transition. The advantage of this design is that it ensures that the third surface area can stably bear the buffer layer, so that the anti-burning scheme of reducing edge strength will not sacrifice the appearance of the interface, while the plane still maintains a high removal efficiency. These regularized parameter relationships solidify the process logic and avoid imbalance caused by arbitrary adjustments.

[0025] In addition, even if a parameter gradient relationship is established, if there is a lack of feasible numerical ranges and overlap widths, feasibility and consistency issues will still arise: Too low a pre-polishing speed will lead to insufficient defect removal and difficulty in quickly increasing gloss during subsequent fine polishing; too high a pre-polishing speed will amplify the risk of overheating; furthermore, too small an overlap width is insufficient to eliminate boundary differences, while too large an overlap width will cause repeated processing, resulting in cycle time loss and potentially introducing new texture bands. In one embodiment, n1 is 1000–1600 r / min, n2 is 600–1200 r / min, and n3 is 0.80n1–0.98n1. The pre-polishing head uses a sanding belt or sandpaper wheel as the pre-polishing medium, and the pre-polishing overlap width between the third surface area and the first and second surface areas is 2 mm–10 mm. Recommended ranges for n1, n2, and n3, and the ratio of n3 to n1, are given here, with the transition overlap width limited to 2 mm–10 mm. mm, and at the same time, it is specified that the pre-polishing medium is abrasive belt to ensure sufficient defect removal capacity. The advantage of this design is that the pre-polishing of the three zones (first surface area, second surface area and third surface area) falls into the process window that can be directly executed, so that stable removal efficiency and boundary transition effect can be obtained on site without repeated trial polishing, improving process reproducibility and taking into account cycle time.

[0026] Furthermore, in scenarios involving continuous production or batch switching between different alloys, frictional heat generation dynamically fluctuates depending on the polishing wheel's condition, ambient temperature, material hardness, and initial surface condition. The second surface region is most prone to becoming the first point of temperature runaway. If only fixed parameters are relied upon, burn-off is likely to occur when heat accumulates or material changes. Moreover, if only the second surface region is adjusted without linking it to the third surface region, the transition gradient will be disrupted, causing the gloss difference at the interface to reappear. In one embodiment, temperature rise monitoring in step S4 uses infrared or contact temperature measurement. When the surface temperature of the second surface region exceeds a preset threshold, regulation is executed. The preset threshold is 50°C to 80°C. Infrared or contact temperature measurement is introduced, and the 50°C to 80°C threshold is set to trigger regulation. Thermal runaway is suppressed by reducing pressure, shortening contact time, reducing feed rate, increasing intervals, or cooling. Simultaneously, the parameters of the third surface region are adjusted to maintain its transition properties, transforming burn-off prevention from post-process rework into process closed-loop control. At the same time, boundary marks caused by edge strength reduction are avoided. A feedback mechanism is established for the most sensitive area to maintain overall appearance consistency.

[0027] Following the above embodiments, in continuous production or under fluctuating material conditions, the frictional heat generated in the second surface region is dynamically changing. Relying solely on fixed process parameters can easily lead to uncontrolled temperature rise due to heat accumulation, resulting in defects such as burns, discoloration, or surface fogging. Furthermore, if only the second surface region is cooled or its strength reduced without adjusting the parameters of the third surface region, the parameter gradient relationship between the first, second, and third surface regions will be disrupted, leading to inconsistent appearances such as abrupt gloss changes and seams at the junctions. In one embodiment, the control includes one or more of the following: reducing the contact pressure of the second surface region, shortening the duration of a single contact, reducing the feed rate, increasing the proportion of intermittent contact, and applying cooling to the second surface region. Multiple methods are used to simultaneously adjust the parameters of the third surface region to maintain its transitional relationship between the first and second surface regions. In step S4, temperature rise monitoring of the second surface region is introduced, and a control mechanism is activated when the temperature exceeds a preset threshold (50℃~80℃). The control methods include: reducing contact pressure, shortening the single contact time, reducing feed rate, increasing the proportion of intermittent contact, and applying cooling. At the same time, the process parameters of the third surface region are adjusted simultaneously to ensure that it still maintains the transitional properties between the first and second surface regions after the control. This adjustment ensures that the parameter gradient between the three regions is not destroyed, thereby suppressing thermal runaway while maintaining the visual continuity of the region boundaries.

[0028] Furthermore, high-gloss targets typically require specific polishing media, such as cloth wheels or wool wheels combined with polishing wax to form a stable polishing film. However, the second surface area is heat-sensitive and prone to burning under continuous contact at high speeds. Additionally, if a different polishing wheel or polishing compound is used in the transition zone compared to the flat surface, differences in reflectivity or color bands can easily occur. In one embodiment, in step S5, the main polishing head uses a cloth wheel or wool wheel for fine polishing, and polishing wax or polishing paste is applied to the polishing wheel. The fine polishing of the second surface area employs an intermittent contact method, which includes alternating cycles of contact time and removal time. The type of polishing wheel and polishing wax or paste used in the three surface areas are the same as those in the first surface area. Fine polishing is limited to using cloth wheels or wool wheels in conjunction with polishing wax to ensure a high gloss formation mechanism. At the same time, intermittent contact is used for the second surface area to reduce heat input. The third surface area is specified to use the same type of polishing wheel and polishing compound as the first surface area to ensure continuous reflective properties. This design allows the plane to quickly obtain high gloss, reduces edge burn-off, and avoids color difference and gloss band caused by material or medium differences in the transition area. The high gloss formation mechanism and the edge heat control mechanism are simultaneously solidified into the process.

[0029] The above emphasizes that the main polishing head speed of 1700 r / min to 1800 r / min is a critical window. However, without a transmission ratio design basis and anti-slip measures, the actual speed may deviate from the target or fluctuate with load changes. In the high-gloss polishing stage, speed fluctuations will directly manifest as unstable gloss, differences in surface texture, and even abnormal local heating. Therefore, in one embodiment, setting the main polishing head speed through a belt speed change mechanism in step S2 includes: selecting the diameters D1 and D2 of the driving pulley according to the output speed A of the drive motor, so that the main polishing head speed B satisfies B = A × D1 / D2, and B is 1700 r / min to 1800 r / min. Speed ​​fluctuations caused by slippage are reduced by replacing at least one pulley and adjusting the belt tension. The relationship between the pulley diameter ratio and the main polishing head speed is given, and the emphasis is on reducing speed drift caused by slippage through pulley replacement and belt tension adjustment. The advantage of this design is that it keeps the speed within the 1700 r / min to 1800 r / min range within the critical window. Transforming r / min from an empirical value into a calculable, verifiable, and maintainable engineering implementation path ensures stable implementation of the critical window for precision polishing and improves the engineering controllability and reproducibility of key parameters.

[0030] During the fine polishing stage, even after applying lower contact intensity or intermittent contact to the second surface area to prevent burn-through, differences may still exist between the second and first surface areas in terms of polishing coverage, film formation degree, and texture direction consistency. Slight seams or gloss gradient bands are particularly prone to form at their interface. Without a dedicated post-processing smoothing action, these differences will be magnified into visible defects under light. To avoid this problem, in one embodiment, the overlapping treatment of the third surface area in step S5 includes: the fine polishing trajectory of the third surface area overlapping with both the first and second surface areas, and... After the second surface area is polished, the third surface area is polished at least once with a transition polish adjacent to the second surface area to eliminate seams and gloss abrupt changes at the boundary of the area. By specifying the overlap polishing of the third surface area with the two side areas, and adding at least one transition polishing to the third surface area with the second surface area after the polishing of the second surface area, the polished film layer and reflective characteristics at the junction are further homogenized. The advantage of this design is that the appearance difference caused by edge control is absorbed and eliminated in the transition area, improving the overall appearance continuity and providing stable process compensation for the location where seams are most likely to occur.

[0031] Working principle and usage process of this invention: To address the inherent differences in thermodynamics and processing characteristics between the main surface and easily burned edges and thin-walled areas in the high-gloss polishing of bathroom aluminum materials, the surface to be processed is divided into a first surface area, a second surface area, and a third surface area. By setting gradient process parameters for each of the three areas and ensuring that the transition zone overlaps with the two side areas on the processing trajectory, the frictional heat concentration in the edge area is effectively suppressed, avoiding burns and haze, while ensuring efficient removal of defects and rapid enhancement of gloss on the surface. In addition, by monitoring the temperature rise of the most sensitive second surface area in real time and dynamically adjusting its process parameters based on the monitoring results, the parameters of the third surface area are adjusted in conjunction to maintain its transition properties, forming a closed-loop, adaptive process control logic.

[0032] In the pre-polishing stage, abrasive belts or sandpaper wheels are used to pre-polish three areas according to a parameter gradient: high gloss on the surface, low gloss on the edges, and centered transition, ensuring the transition area overlaps with the adjacent areas. In the fine polishing stage, a belt-driven speed control mechanism precisely limits the main polishing head speed to the critical window of 1700 r / min~1800 r / min for high-gloss effect. High-gloss fine polishing is performed on the flat areas, while the edge areas are finely polished using intermittent contact and low-heat input methods. Simultaneously, the transition area uses the same polishing media as the flat areas for overlapping fine polishing. Throughout the process, the temperature rise of the edge areas is monitored; if the limit is exceeded, automatic adjustment and linkage adjustment of the transition area are implemented. Finally, cleaning and inspection are performed, and parameters are optimized based on defect feedback, with key steps repeated until the appearance quality requirements are met, thus forming a complete polishing process that is efficient, stable, and self-correcting.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A method for high-efficiency polishing of aluminum materials, characterized in that, Includes the following steps: S1: Pre-treat and clamp the aluminum workpiece to be polished; S2: Define the visible planar area of ​​the main body as the first surface area, define the easily burnable areas at corners, edges, thin walls, or small rounded corner radii as the second surface area, and define the transition area located between the first and second surface areas to connect the process differences between the two as the third surface area. Based on the characteristics of the three surface areas, the corresponding process parameters are set for each area. At the same time, a polishing device including a pre-polishing head and a main polishing head is provided. The main polishing head is connected to the drive motor through a belt speed change mechanism. By setting the speed increase transmission ratio of the belt speed change mechanism, the working speed of the main polishing head is limited to 1700 r / min to 1800 r / min. S3: The pre-polishing head is used to pre-polish the first surface area, the second surface area and the third surface area respectively. The pre-polishing parameter intensity of the first surface area is higher than that of the second surface area, and the pre-polishing parameter intensity of the third surface area is between that of the first surface area and the second surface area, so that the third surface area overlaps with the first surface area and the second surface area on the processing trajectory. S4: Monitor the temperature rise and surface condition of the second surface region, and adjust the pre-polishing and fine polishing parameters of the second surface region according to the monitoring results. At the same time, adjust the transition parameters of the third surface region in a coordinated manner so that the third surface region always maintains a transitional relationship between the first and second surface regions. S5: Fine polishing is performed under the condition that the main polishing head speed is 1700~1800 r / min. High-gloss fine polishing is performed on the first surface area, fine polishing to suppress frictional heat generation is performed on the second surface area and its fine polishing parameters are lower than those of the first surface area, and transitional fine polishing between the first and second surface areas is performed on the third surface area, and it overlaps with the first and second surface areas to reduce the gloss difference at the boundary of the area. S6: After polishing, clean and inspect the appearance, and adjust the process parameters of the corresponding area according to the area where the defect is located. Repeat the corresponding operations in S3 to S5 until the appearance quality requirements are met.

2. The method for high-efficiency polishing of aluminum materials according to claim 1, characterized in that, The pretreatment in step S1 includes cleaning the aluminum workpiece by removing oil and dust, and the clamping and positioning includes positioning and clamping the aluminum workpiece on the polishing fixture so that the surface to be polished is in a processing posture that can be stably contacted by the polishing head.

3. The method for high-efficiency polishing of aluminum materials according to claim 1, characterized in that, The regional design in step S2 includes: dividing the strip-shaped range that is less than a first distance threshold from the outer contour edge of the workpiece, the part with a corner radius less than a radius threshold, and the part with a wall thickness less than a thickness threshold into a second surface region; dividing the strip-shaped range that is between the first distance threshold and the second distance threshold from the outer contour edge into a third surface region; and dividing the remaining part into a first surface region.

4. The method for high-efficiency polishing of aluminum materials according to claim 1, characterized in that, In step S3, the pre-polishing parameters of the three regions satisfy the following: the pre-polishing speed of the first surface region is n1, the pre-polishing speed of the second surface region is n2, and the pre-polishing speed of the third surface region is n3, and n1 ≥ n3 > n2; the pre-polishing contact pressure of the first surface region is P1, the pre-polishing contact pressure of the second surface region is P2, and the pre-polishing contact pressure of the third surface region is P3, and P1 ≥ P3 > P2.

5. The method for high-efficiency polishing of aluminum materials according to claim 4, characterized in that, The n1 is 1000-1600 r / min, the n2 is 600-1200 r / min, the n3 is 0.80n1-0.98n1, the pre-polishing head uses a sanding belt or sandpaper wheel as the pre-polishing medium, and the pre-polishing overlap width between the third surface area and the first and second surface areas is 2 mm-10 mm.

6. The method for high-efficiency polishing of aluminum materials according to claim 1, characterized in that, The temperature rise monitoring in step S4 uses infrared temperature measurement. When the surface temperature of the second surface area exceeds a preset threshold, control is performed. The preset threshold is 50℃~80℃.

7. The method for high-efficiency polishing of aluminum materials according to claim 6, characterized in that, The regulation includes one or more of the following: reducing the contact pressure of the second surface region, shortening the single contact time, reducing the feed rate, increasing the proportion of intermittent contact, and applying cooling to the second surface region.

8. The method for high-efficiency polishing of aluminum materials according to claim 1, characterized in that, In step S5, the main polishing head uses a cloth wheel for fine polishing and applies polishing wax or polishing paste to the polishing wheel. The fine polishing of the second surface area uses an intermittent contact method, which includes alternating cycles of contact time and departure time. The type of polishing wheel and the type of polishing wax or polishing paste used for the third surface area are the same as those used for the first surface area.

9. The method for high-efficiency polishing of aluminum materials according to claim 1, characterized in that, In step S2, setting the main throwing head speed via the belt speed change mechanism includes: selecting the diameter of the driving pulley D1 and the diameter of the driven pulley D2 according to the output speed A of the drive motor, so that the main throwing head speed B satisfies B = A × D1 / D2, and B is 1700 r / min to 1800 r / min.

10. The method for high-efficiency polishing of aluminum materials according to claim 1, characterized in that, The overlapping process of the third surface region in step S5 includes: the fine polishing trajectory of the third surface region overlaps with the first surface region and the second surface region respectively, and after the fine polishing of the second surface region is completed, the third surface region is subjected to at least one re-transition fine polishing adjacent to the second surface region.

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