Aluminum plate oxidation treatment process and rolling auxiliary assembly

Abstract

The invention relates to the technical field of aluminum plate oxidation treatment, in particular to an aluminum plate oxidation treatment process and a rolling auxiliary assembly. The method comprises the following steps: S1, electrifying an aluminum plate through conductive equipment; s2, carrying out electrolytic treatment in an electrolytic bath; the conductive equipment comprises a base and a conductive roller, the conductive roller is rotationally connected with the base, and the aluminum plate and the conductive roller are in tight and large-area contact; s3, entering surface treatment equipment after passing through the electrolytic bath; s4, feeding into drying equipment; and S5, after drying is completed, the aluminum plate is rolled. The conductive roller can keep synchronous movement with low energy loss when the aluminum plate advances, the conductive roller can respond quickly, the situation that the aluminum plate is broken or deformed and damaged due to response delay of the driving part is avoided, and then the problem that the response speed of the conductive roller and the synchronism of the conductive roller and the aluminum plate cannot meet the requirements is solved.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum plate oxidation treatment, in particular to an aluminum plate oxidation treatment process and a rolling auxiliary component. Background Art

[0002] Aluminum plate oxidation treatment, especially anodizing treatment, does require the aluminum plate to be placed in an electrolytic cell as an anode. This process is to form a dense oxide film on the surface of the aluminum plate under specific conditions through the action of an external current. This film not only enhances the corrosion resistance of the material, but also gives it better wear resistance and aesthetics.

[0003] Specifically, see Figure 1 As shown in the figure, during the anodizing process, the aluminum plate is placed in an electrolytic cell containing an electrolyte as an anode (positive electrode), while another electrode serves as a cathode (negative electrode). When a direct current is applied by a passing conductive roller, the aluminum atoms on the aluminum plate lose electrons to become aluminum ions, and combine with oxygen ions in the electrolyte solution to form aluminum oxide. As the current continues to pass, an oxide layer gradually forms on the aluminum surface that grows from the inside out.

[0004] When the aluminum plate moves, the power comes from the pulling force during winding. In this process, the aluminum plate is prone to breakage due to the large subsequent resistance, especially when passing through the conductive roller, the aluminum plate needs to stick to the surface of the conductive roller, and the radius of the conductive roller is relatively large. This causes the aluminum plate to encounter great resistance at the conductive roller when moving, and often breaks or deforms and is damaged.

[0005] Therefore, an aluminum plate oxidation treatment process and a rolling auxiliary component are proposed. Summary of the invention

[0006] The rotation of the conductive roller can effectively reduce the resistance encountered by the aluminum plate when it moves. However, the problem is that if the motor or other driving parts directly drive the conductive roller to rotate, then there are very high requirements for the response speed of the conductive roller and the synchronization with the aluminum plate. If the conductive roller does not rotate in time when the aluminum plate moves, the pulling force generated at the start will directly cause the aluminum plate to break. If the conductive roller fails to stop rotating in time when the aluminum plate stops, it will easily cause the aluminum plate to deform.

[0007] In order to solve the above problems, an aluminum plate oxidation treatment process is proposed, comprising the following steps: S1. The aluminum plate is energized by a conductive device; S2, then enters the electrolytic cell for electrolysis treatment; The conductive device comprises a base and a conductive roller, wherein the conductive roller is rotatably connected to the base, and the aluminum plate is in close and large-area contact with the conductive roller; S3, after passing through the electrolytic cell, enters the surface treatment equipment; S4, then enter the drying equipment; S5, after drying, the aluminum plate is rolled up; Among them, the winding action is the power source during the movement of the aluminum plate; The conductive roller can maintain synchronous movement with low energy loss when the aluminum plate moves, so that the aluminum plate moves smoothly without breaking or being damaged; When the aluminum plate stops moving, the conductive roller stops rotating immediately.

[0008] In the above scheme, the conductive roller is in a "zero resistance" state. The conductive roller moves when the aluminum plate moves, and stops when the aluminum plate stops. That is to say, the conductive roller is not actively synchronized with the aluminum plate, but is in a "quasi-static" self-locking state. Only the friction generated by the movement of the aluminum plate can break this self-locking state. When the aluminum plate stops moving, the conductive roller remains in the self-locking state, so that the conductive roller can respond quickly, avoiding the breakage or deformation damage of the aluminum plate due to the delayed response of the driving component, thereby solving the problem that the response speed of the conductive roller and the synchronization with the aluminum plate do not meet the requirements.

[0009] Preferably, an acidic electrolyte is added into the electrolytic cell; Acidic electrolytes include sulfuric acid and oxalic acid; The conductive roller is in contact with the aluminum plate so that the aluminum plate is electrified to serve as an anode of thermoelectrochemical oxidation. As the current continues to flow, a protective film composed of aluminum oxide is formed on the surface of the aluminum plate.

[0010] Furthermore, the aluminum plate enters the upper vertex of the conductive roller from the lower side and then enters the electrolytic cell from the lower side to increase the contact area and contact pressure between the aluminum plate and the conductive roller.

[0011] Furthermore, the diameter of the conductive roller is 400-500 mm.

[0012] Also proposed is a rolling auxiliary assembly for use in any of the above-mentioned aluminum plate oxidation treatment processes, which is disposed adjacent to the conductive roller; A rotating shaft is coaxially arranged on one side of the conductive roller facing the rolling auxiliary component; The rolling auxiliary assembly is used to provide driving force to the rotating shaft; The driving force is less than or equal to the load on the rotating shaft.

[0013] As a further improvement of the technical solution, it includes a support, a first gear set, a second gear set and a motor, and the support and the motor are both installed on the base; The output end of the motor is connected to a driving shaft via a first gear set; The end of the rotating shaft is connected to the transmission shaft through the second gear set, so that the load on the rotating shaft acts on the transmission shaft; The drive shaft and the transmission shaft are in frictional contact with each other under the support of the support. When the drive shaft rotates, the friction force generated by the frictional contact constitutes the driving force.

[0014] As a further improvement of the present technical solution, a docking chamber is opened in the support along the axial direction of the drive shaft and the transmission shaft, a sleeve is provided at the end of the transmission shaft located in the docking chamber, one end of the drive shaft is docked with the sleeve, and the outer surface of the drive shaft is in contact with the inner surface of the sleeve.

[0015] In this solution, the drive shaft is always rotating. When the aluminum plate does not apply any pulling force to the conductive roller, the driving force generated by the contact between the drive shaft and the sleeve is not enough to overcome the static friction on the sleeve, so the sleeve and the drive shaft remain stationary. At this time, due to the absence of external force, the drive shaft is actually in a "quasi-static" self-locking state. This means that although the drive shaft is rotating, due to insufficient friction conditions, it cannot effectively transmit enough torque to the drive shaft to keep the latter stationary, so there is no need to consider when the drive shaft starts and stops.

[0016] As a further improvement of the technical solution, the first gear set includes a bevel gear box, a first transmission gear is provided on one side of the bevel gear box, and the bevel gear box is used to connect the first transmission gear to the output of the motor; The end of the driving shaft is coaxially fixedly connected with a second transmission gear, and the second transmission gear is meshed with the first transmission gear; The second gear set includes a large gear and a small gear that mesh with each other. The large gear is coaxially connected to the rotating shaft, and the small gear is coaxially and fixedly connected to the transmission shaft.

[0017] Preferably, the radius of the first transmission gear is 3cm to 5cm, and the radius of the second transmission gear is 8cm-10cm. The first transmission gear drives the second transmission gear to achieve speed reduction, so that the drive shaft can run at a lower speed. On the one hand, the contact frequency between the gears is reduced, and on the other hand, the energy loss between the drive shaft and the sleeve is reduced.

[0018] Preferably, the radius of the large gear is 40cm to 50cm, and the radius of the small gear is 3cm to 5cm. Since the large gear has more teeth than the small gear, the small gear will rotate at a higher speed and transmit a greater torque to the drive shaft. In this way, the aluminum plate can provide sufficient force to overcome static friction even at a lower travel speed, helping to achieve smooth starting. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the oxidation treatment of the aluminum plate of the present invention; Figure 2 It is a schematic diagram of the structure of the conductive device of the present invention; Figure 3 It is a schematic diagram of the structure of the rolling auxiliary component of the present invention; Figure 4 It is a schematic diagram of the drive shaft, transmission shaft and support structure of the present invention; Figure 5 It is a schematic diagram of the side structure of the drive shaft and the transmission shaft of the present invention; Figure 6 It is a schematic structural diagram of the first transmission gear and the second transmission gear of the present invention; Figure 7 It is a schematic diagram of the structure of the large gear and the small gear of the present invention. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] During the oxidation process of the aluminum plate, the power for the linear movement of the aluminum plate comes from the tension during winding. During this process, the aluminum plate is prone to breakage due to the large subsequent resistance.

[0022] In the first embodiment, an aluminum plate oxidation treatment process is provided to solve the above problems. Figure 1 As shown, the specific steps are as follows: S1, the aluminum plate is energized by a conductive device 100; S2, then enter the electrolytic cell 200 for electrolytic treatment; S3, entering the surface treatment equipment 300; S4, entering the drying equipment 400; S5, after drying, the aluminum plate is rolled up; Among them, see Figure 2 As shown, the conductive device 100 includes a base 110 and a conductive roller 120, and the conductive roller 120 is rotatably connected to the base 110. The conductive roller 120 contacts the aluminum plate so that the aluminum plate is energized to serve as an anode for thermoelectrochemical oxidation. Acidic electrolytes such as sulfuric acid and oxalic acid are added to the electrolytic cell 200. In an acidic environment, the aluminum plate as an anode will lose electrons to form aluminum ions, and at the same time, the hydroxide ions in the water accept these electrons to generate oxygen.

[0023] However, it should be noted that in actual operation, especially under strong acid conditions, the hydrogen produced by hydrolysis may also become one of the main reduction products.

[0024] As the current continues to pass, a protective film composed of aluminum oxide gradually forms on the surface of the aluminum plate. This film not only prevents further direct dissolution, but is also self-repairing, as any exposed fresh metal surface will quickly oxidize again. This oxide film has a porous structure, with large pores in the initial stage. As the treatment time increases, the pores gradually shrink and close, eventually forming a dense and hard barrier.

[0025] During use, since the aluminum plate needs to be in close contact with the conductive roller 120, the height of the support rollers on both sides should be lower than the height of the conductive roller 120, so that the aluminum plate will enter the upper vertex of the conductive roller 120 from the low side, and then enter the electrolytic cell 200 from the low side to increase the contact area between the aluminum plate and the conductive roller 120. In addition, the aluminum plate passing through the support rollers on both sides can naturally pass over the conductive roller 120, and then use gravity to make the aluminum plate naturally approach the conductive roller 120, increasing the contact pressure between the two and achieving close contact, thereby improving the contact quality and reducing factors that may cause poor contact.

[0026] Moreover, under the guidance of the support rollers on both sides, the travel path of the aluminum plate can be effectively controlled to ensure that it contacts the conductive roller 120 at the most suitable angle and position. However, if the radius of the conductive roller 120 is increased, the contact area with the aluminum plate is increased. The larger contact area allows more electrons to be transferred from the aluminum plate to the conductive roller 120 and eventually enter the external circuit, which means that more aluminum ions can be processed at the same time, accelerating the anodizing process.

[0027] The problem that follows is that the aluminum plate itself is already in close contact with the conductive roller 120, that is, there is a certain pressure on the aluminum plate on the conductive roller 120. Under this pressure, the friction between the aluminum plate and the conductive roller 120 is relatively large. Not only that, a higher tangential stress will be formed at the contact position. Especially for thinner or lower hardness aluminum plates, this tangential stress may exceed the shear strength limit of the material itself, thereby causing the aluminum plate to break.

[0028] In fact, a standard industrial-grade aluminum alloy plate with a thickness of 0.3 mm is subjected to thermo-electrochemical oxidation treatment using a conductive roller 120 with a diameter of 100 mm. The pressing force between the aluminum plate (i.e., the standard industrial-grade aluminum alloy plate) and the conductive roller 120 is set to 3N / cm², which can both ensure good electrical contact and prevent the aluminum plate from breaking due to excessive friction.

[0029] In this embodiment, the diameter of the conductive roller 120 is enlarged to 400-500 mm, so it is necessary to reduce the friction between the aluminum plate and the conductive roller 120. The common practice is to reduce the contact pressure between the aluminum plate and the conductive roller 120. However, the solution adopted in this embodiment is as follows: like Figure 2and Figure 3 As shown, a rolling auxiliary component is provided on the base 110, combined with Figure 5 As shown, the rolling auxiliary component is used to provide a driving force f to the rotating shaft 121 of the conductive roller 120, but the driving force f is less than or equal to the load F on the rotating shaft 121. The load F specifically refers to the resistance acting on the rotating shaft 121 or the sum of various forces that hinder its free rotation. These resistances include but are not limited to internal friction of the bearing, friction of the seal (Note: the friction here does not include the friction between the aluminum plate and the conductive roller 120 mentioned above, because the aluminum plate is stationary at this time) and the inertia force caused by the gravity of the conductive roller 120 itself. Usually, when the driving force f is greater than the load F, the rotating shaft 121 can rotate, and the rotation of the rotating shaft 121 drives the conductive roller 120 to roll (i.e., rotate along the axis of the rotating shaft 121).

[0030] The driving force f is the friction force acting on the rotating shaft 121. This friction force is set at a specific level (the driving force f is equal to the load F on the rotating shaft 121), which is the so-called "critical friction force". This friction force cannot drive the rotating shaft 121 to drive the conductive roller 120 to roll alone, but when the aluminum plate moves, additional pulling force is applied. The total force of the two together is sufficient to overcome the load F, so that the conductive roller 120 begins to rotate with the aluminum plate.

[0031] Specifically, Figure 3 As shown, the rolling auxiliary assembly includes a support 150, a first gear set, a second gear set and a motor 130, wherein the support 150 and the motor 130 are both mounted on the base 110, as shown in FIG. Figure 4 and Figure 5 As shown, one side of the support 150 is rotatably connected to a drive shaft 1511, and the other side is rotatably connected to a transmission shaft 1531 coaxially with the drive shaft 1511. A docking chamber 150A is opened in the support 150 along the axial direction of the drive shaft 1511 and the transmission shaft 1531, and a sleeve 1532 is provided at the end of the transmission shaft 1531 located in the docking chamber 150A. One end of the drive shaft 1511 is docked with the sleeve 1532, and the outer surface of the drive shaft 1511 is in contact with the inner surface of the sleeve 1532.

[0032] Among them, the other end of the driving shaft 1511 is connected to the motor 130 through the first gear set, and the end of the transmission shaft 1531 away from the sleeve 1532 is connected to the rotating shaft 121 through the second gear set. The driving shaft 1511 rotates under the drive of the motor, and the outer surface of the driving shaft 1511 contacts the inner surface of the sleeve 1532 to generate friction (i.e., driving force f), but the generated friction force is not enough to overcome the load F on the transmission shaft 1531, so the rotating shaft 121 at this time cannot drive the conductive roller 120 to rotate. Once the aluminum plate starts to move, a friction force is formed on the contact surface between the aluminum plate and the conductive roller 120. The combined force of this friction force and the previous driving force f causes the conductive roller 120 to start rotating, and the originally existing large static friction force will quickly turn into a smaller dynamic friction force. This means that during the continuous movement of the aluminum plate, the conductive roller 120 can maintain synchronous movement with lower energy loss, and the aluminum plate will not break due to excessive friction resistance.

[0033] like Figure 3 As shown, the first gear set includes a bevel gear box 140, and there are two vertical first connecting shafts 141 and second connecting shafts 142 in the bevel gear box 140, which are connected by bevel gears, and one of the connecting shafts (the first connecting shaft 141) is connected to the output shaft (i.e., the output end) of the motor 130 through a belt and a pulley. When the motor 130 is running, its output shaft will naturally drive the first connecting shaft 141 to rotate, and the other connecting shaft (the second connecting shaft 142) will rotate synchronously, and the end of the second connecting shaft 142 is coaxially fixedly connected with the first transmission gear 152; Figure 4 As shown, the end of the driving shaft 1511 is coaxially fixedly connected with the second transmission gear 151 , and the second transmission gear 151 is meshed with the first transmission gear 152 .

[0034] See also Figure 3 and Figure 4 As shown, the second gear set includes a large gear 123 and a small gear 153 that mesh with each other. The large gear 123 is coaxially connected to the rotating shaft 121, and a bearing seat 122 is also provided outside the rotating shaft 121. The small gear 153 is coaxially fixedly connected to the transmission shaft 1531. In this way, when the aluminum plate moves, an additional pulling force is applied to the conductive roller 120, and the large gear 123 transmits the pulling force to the small gear 153, and finally acts on the outside of the transmission shaft 1531. Figure 5 As shown, at this time, the transmission shaft 1531 is in a "zero resistance" state under the action of the driving force f, so the conductive roller 120 can be easily pulled by the aluminum plate and rotate with the aluminum plate. Once the aluminum plate stops pulling, the conductive roller 120 stops rotating immediately.

[0035] When working, the motor 130 is always in operation, that is, the drive shaft 1511 is always rotating. When the aluminum plate does not apply any pulling force to the conductive roller 120, the driving force f (friction force) generated by the contact between the drive shaft 1511 and the sleeve 1532 is not enough to overcome the static friction force on the sleeve 1532, so the sleeve 1532 and the transmission shaft 1531 remain stationary. At this time, due to the absence of external force, the transmission shaft 1531 is actually in a "quasi-static" self-locking state. This means that although the drive shaft 1511 is rotating, due to insufficient friction conditions, it cannot effectively transmit enough torque to the transmission shaft 1531, thereby keeping the latter stationary.

[0036] It should be noted that the "zero resistance" state under the self-locking condition changes once the aluminum plate starts to pull the conductive roller 120, and even a very small force applied by the aluminum plate is enough to break the self-locking state, so that the transmission shaft 1531 can easily rotate synchronously with the drive shaft 1511. In other words, in this case, the transmission shaft 1531 can indeed be regarded as being in an almost "zero resistance" state, because it only needs to overcome a very small starting friction force to start moving.

[0037] When the aluminum plate gently provides a pulling force, the conductive roller 120 will rotate synchronously with the aluminum plate. The key here is the way the friction between the conductive roller 120 and the aluminum plate works: as the speed of the aluminum plate changes, the relative speed between the conductive roller 120 and the aluminum plate will also change, which in turn affects the friction between the two. If the aluminum plate stops moving, the conductive roller 120 will also stop, because there is no relative motion at this time, and the friction force becomes static friction again, preventing further rotation. This mechanism ensures that the rotating roller always keeps pace with the movement of the aluminum plate, neither ahead nor behind.

[0038] The second embodiment, as Figure 6 As shown, the radius R1 of the first transmission gear 152 is between 3cm and 5cm, and the radius R2 of the second transmission gear 151 is between 8cm and 10cm. The first transmission gear 152 drives the second transmission gear 151 to reduce the speed, so that the drive shaft 1511 can run at a lower speed. On the one hand, the contact frequency between the gears is reduced, and on the other hand, the energy loss between the drive shaft 1511 and the sleeve 1532 is reduced.

[0039] The third embodiment, as Figure 7As shown, the radius R3 of the large gear 123 is between 40cm and 50cm, and the radius R4 of the small gear 153 is between 3cm and 5cm. In this way, the design of the large gear 123 driving the small gear 153 means that it has the effect of reducing speed and increasing torque. Specifically, when the aluminum plate starts to move and applies friction to the conductive roller 120, the large gear 123 connected to the conductive roller 120 is acted upon by the force and transmits this force to the small gear 153 meshing with it. Since the large gear 123 has more teeth than the small gear 153, the small gear 153 will rotate at a higher speed and transmit a greater torque to the transmission shaft 1531. In this way, even at a lower travel speed, the aluminum plate can provide enough power to overcome static friction and help achieve a smooth start.

[0040] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An aluminum plate oxidation treatment process, characterized in that: The steps include: S1, the aluminum plate is subjected to an electric current treatment through a conductive device (100); S2, then entering the electrolytic cell (200) for electrolytic treatment; The conductive device (100) comprises a base (110) and a conductive roller (120), wherein the conductive roller (120) is rotatably connected to the base (110), and the aluminum plate is in close and large-area contact with the conductive roller (120); S3, after passing through the electrolytic cell (200), entering the surface treatment equipment (300); S4, then enter the drying equipment (400); S5, after drying, the aluminum plate is rolled up; Among them, the winding action is the power source during the movement of the aluminum plate; The conductive roller (120) can maintain synchronous movement with low energy loss when the aluminum plate moves, so that the aluminum plate moves smoothly without breaking or being damaged; When the aluminum plate stops moving, the conductive roller (120) stops rotating.

2. The aluminum plate oxidation treatment process according to claim 1, characterized in that: An acidic electrolyte is added into the electrolytic cell (200); Acidic electrolytes include sulfuric acid and oxalic acid; The conductive roller (120) is in contact with the aluminum plate so that the aluminum plate is energized to serve as an anode for thermoelectrochemical oxidation. As the current continues to flow, a protective film composed of aluminum oxide is formed on the surface of the aluminum plate.

3. The aluminum plate oxidation treatment process according to claim 2, characterized in that: The aluminum plate enters the upper vertex of the conductive roller (120) from the lower side, and then enters the electrolytic cell (200) from the lower side, so as to increase the contact area and contact pressure between the aluminum plate and the conductive roller (120).

4. The aluminum plate oxidation treatment process according to claim 3, characterized in that: The diameter of the conductive roller (120) is 400-500 mm.

5. A rolling auxiliary component for the aluminum plate oxidation treatment process according to any one of claims 1 to 4, characterized in that: It is arranged adjacent to the conductive roller (120); A rotating shaft (121) is coaxially arranged on a side of the conductive roller (120) facing the rolling auxiliary component; The rolling auxiliary component is used to provide driving force to the rotating shaft (121); The driving force is less than or equal to the load on the rotating shaft (121).

6. The rolling assist assembly according to claim 5, characterized in that: It comprises a support (150), a first gear set, a second gear set and a motor (130), wherein the support (150) and the motor (130) are both mounted on a base (110); The output end of the motor (130) is connected to a drive shaft (1511) via a first gear set; The end of the rotating shaft (121) is connected to a transmission shaft (1531) via a second gear set, so that the load on the rotating shaft (121) acts on the transmission shaft (1531); The drive shaft (1511) and the transmission shaft (1531) are in frictional contact with each other under the support of the support (150); when the drive shaft (1511) rotates, the friction force generated by the frictional contact constitutes the driving force.

7. The rolling assist assembly according to claim 6, characterized in that: A docking chamber is provided in the support (150) along the axial direction of the drive shaft (1511) and the transmission shaft (1531); a sleeve (1532) is provided at the end of the transmission shaft (1531) located in the docking chamber; one end of the drive shaft (1511) is docked with the sleeve (1532), and the outer surface of the drive shaft (1511) is in contact with the inner surface of the sleeve (1532).

8. The rolling assist assembly according to claim 6, characterized in that: The first gear set comprises a bevel gear box (140), a first transmission gear (152) being provided on one side of the bevel gear box (140), and the bevel gear box (140) is used to connect the first transmission gear (152) to the output of the motor (130); The end of the driving shaft (1511) is coaxially fixedly connected to a second transmission gear (151), and the second transmission gear (151) is meshed with the first transmission gear (152); The second gear set comprises a large gear (123) and a small gear (153) that mesh with each other, the large gear (123) being coaxially connected to the rotating shaft (121), and the small gear (153) being coaxially fixedly connected to the transmission shaft (1531).

9. The rolling assist assembly according to claim 8, characterized in that: The radius of the first transmission gear (152) is 3 cm to 5 cm, and the radius of the second transmission gear (151) is 8 cm to 10 cm.

10. The rolling assist assembly according to claim 9, characterized in that The radius of the large gear (123) is 40 cm to 50 cm, and the radius of the small gear (153) is 3 cm to 5 cm.

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