Reverse-flow type production system and production process method for polishing and compounding aluminum sheets and aluminum ingots

Abstract

The invention discloses an aluminum sheet and aluminum ingot polishing and compounding backflow type production system and a production process method. The aluminum sheet and aluminum ingot polishing and compounding backflow type production system comprises a first polishing line and a second polishing line. The first polishing line comprises a first polishing mechanism and a turn-over mechanism, the first polishing mechanism is used for polishing the single face of the aluminum sheet, and the turn-over mechanism is used for turning over the polished aluminum sheet till the polishing face faces downwards; the second polishing line comprises a second polishing mechanism and a turnover mechanism; the second grinding mechanism is used for double-sided grinding of the aluminum ingot; the turnover mechanism is used for turning over the aluminum ingots subjected to double-sided polishing; an adsorption hoisting mechanism is arranged between the discharging side of the first polishing line and the feeding side of the second polishing line in a crossing mode. The adsorption hoisting mechanism is used for carrying the aluminum sheets on the turn-over mechanism to the feeding side of the second polishing line and stacking the aluminum sheets on the upper surfaces of the polished aluminum ingots. The technical problems that in the prior art, after polishing, an oxide film on the surface is regenerated, a sheet is warped and is difficult to fit, and interface dust pollution is caused are solved, and instantaneity, collinearity and function intensification of polishing and compounding are achieved.

Description

Technical Field

[0001] This invention relates to the field of metal material surface treatment and composite processing technology, and in particular to a reflow production system and process method for grinding and compositing aluminum sheets and ingots. Background Technology

[0002] Aluminum / aluminum composite sheets are widely used in heat exchangers, building decoration, rail transportation and other fields. The typical production process includes: grinding the composite surfaces of aluminum sheets (thin plates) and aluminum ingots (thick plates) separately to remove the oxide layer and activate the surface, and then bonding the ground surfaces together by rolling or pressing to achieve metallurgical bonding.

[0003] In existing technologies, the grinding and lamination processes are separated. Aluminum sheets and ingots are typically ground, stacked, and transported on separate production lines before being brought together at the lamination equipment for stacking. After grinding, the aluminum surface is exposed to air for several minutes to several hours, rapidly forming a dense oxide film that severely weakens the bonding strength of the lamination interface. Furthermore, the aluminum sheets warp due to stress release after grinding, making it difficult to adhere tightly to the aluminum ingot surface during subsequent lamination. Air can easily remain between layers, forming bubbles or incomplete adhesion. Aluminum shavings and abrasive particles generated during grinding float in the air or deposit on the roller surface, easily transferring to the already clean ground surface and causing inclusion defects at the lamination interface.

[0004] To address these issues, those skilled in the art have attempted to shorten the distance between the polishing and laminating lines, add dust covers, and install flipping machines. However, existing improvements remain at the level of process connection and fail to fundamentally change the offline production model of polishing and storing first, then retrieving and laminating later. A significant amount of the golden time for surface activity after polishing is still wasted on logistics waiting. Summary of the Invention

[0005] Purpose of the invention: In order to overcome the shortcomings of the existing technology, the present invention provides a reflow production system and production process for grinding and bonding aluminum sheets and ingots, so as to solve the technical problems of surface oxide film regeneration after grinding, difficulty in bonding thin sheets due to warping, and interface dust pollution in the existing technology, and realize the real-time, on-line and functional integration of grinding and bonding.

[0006] Technical Solution: To achieve the above objectives, the present invention provides a recirculation production system and process method for composite grinding of aluminum sheets and ingots, comprising a first grinding line and a second grinding line arranged side by side; the first grinding line includes a first grinding mechanism and a flipping mechanism arranged sequentially along a first direction, the first grinding mechanism being used to grind one side of the aluminum sheet, and the flipping mechanism being used to flip the ground aluminum sheet so that its ground surface faces down; the second grinding line includes a second grinding mechanism, a flipping mechanism, a binding mechanism, and a feeding roller conveyor arranged sequentially along a second direction; the second grinding mechanism is used to perform double-sided grinding on both the upper and lower surfaces of the aluminum ingot; the flipping mechanism is arranged adjacent to the discharge side of the second grinding mechanism and is used to flip the ground aluminum ingot; an adsorption and hoisting mechanism is provided between the discharge side of the first grinding line and the loading side of the second grinding line; the adsorption and hoisting mechanism is used to adsorb and transport the ground aluminum sheet with its ground surface facing down from the flipping mechanism to the loading side of the second grinding line, and stack the aluminum sheet on the upper surface of the ground aluminum ingot on the loading side of the second grinding line.

[0007] Furthermore, the feeding side of the second grinding line is provided with an aluminum ingot feeding roller conveyor, and a stacking positioning area is provided between the aluminum ingot feeding roller conveyor and the feeding side of the second grinding mechanism; the station where the adsorption and hoisting mechanism stacks aluminum sheets on the upper surface of the aluminum ingot is located in the stacking positioning area.

[0008] Furthermore, the second grinding mechanism has a working state and a composite channel state; in the working state, the upper and lower grinding heads of the second grinding mechanism rotate at a set speed and perform double-sided grinding on the passing aluminum ingot; in the composite channel state, the upper and lower grinding heads are raised and lowered to a preset clamping position and run at zero speed or a speed lower than the grinding speed to apply clamping pressure to the stack of passing aluminum ingot and aluminum sheet, and the dust collection system of the second grinding mechanism remains on.

[0009] Furthermore, the flipping mechanism is used to flip the aluminum ingot that has undergone double-sided grinding for the first time, so that the lower grinding surface of the aluminum ingot faces upward during double-sided grinding; the aluminum ingot after the first flip flows back to the stacking positioning area and is stacked with the aluminum sheet transported by the adsorption and hoisting mechanism to form a single-sided composite; the single-sided composite passes through the second grinding mechanism in the state of the composite channel and is flipped a second time by the flipping mechanism, so that the other grinding surface of the aluminum ingot faces upward; the single-sided composite after the second flip flows back to the stacking positioning area again and is stacked with another aluminum sheet transported again by the adsorption and hoisting mechanism to form a double-sided composite; the double-sided composite passes through the second grinding mechanism in the state of the composite channel and is directly connected to the binding mechanism via the flipping mechanism.

[0010] Furthermore, the first grinding line also includes a moving roller conveyor that reciprocates along a first direction, for supporting and transporting the aluminum sheet through the first grinding mechanism.

[0011] Furthermore, the flipping mechanism includes a fixed bracket disposed at one end of the adsorption and hoisting mechanism, and two flipping frames respectively hinged to the fixed bracket and the moving roller conveyor. The two flipping frames are configured such that when the moving roller conveyor moves to align with the fixed bracket, the two flipping frames cooperate to clamp the polished aluminum sheet, and cause the aluminum sheet to be flipped from the moving roller conveyor and driven onto the fixed bracket.

[0012] Furthermore, the adsorption and hoisting mechanism includes a lateral movement drive unit, a lifting drive unit, and at least one set of vacuum suction cup frames.

[0013] Furthermore, the flipping mechanism includes a rotating frame and two conveying rollers fixedly installed on the rotating frame. The two conveying rollers are symmetrical about the rotation axis of the rotating frame and arranged parallel to each other, and a space is formed between the two conveying rollers to accommodate or pass through the aluminum ingot and the composite.

[0014] Furthermore, the feeding side and the discharging side of the second grinding mechanism are provided with air curtain isolation devices; the air curtain isolation devices are configured to form a high-speed downward airflow curtain that blocks the diffusion of grinding dust to the stacking positioning area and the flipping mechanism when the second grinding mechanism is in operation.

[0015] Furthermore, the process flow for achieving double-sided composite manufacturing through the structural layout of the production system includes the following steps:

[0016] S1. The aluminum ingot is polished on both sides by the second polishing mechanism. Its lower surface is the first polishing surface and its upper surface is the second polishing surface. Then it enters the flipping mechanism for the first flipping, so that the first polishing surface faces upward.

[0017] S2. The aluminum ingot is returned to the stacking and positioning area. The adsorption and hoisting mechanism transports the first aluminum sheet and stacks it on the first polished surface of the aluminum ingot to form a single-sided composite.

[0018] S3. The single-sided composite body moves towards the second polishing mechanism, the second polishing mechanism switches to the composite channel state, the single-sided composite body passes through under the clamping and pressing of the upper and lower brush rollers, and at the same time the dust collection system performs strong suction cleaning on the second polishing surface of the aluminum ingot.

[0019] S4. The single-sided composite material reaches the flipping mechanism, which flips it a second time so that the second polished surface of the aluminum ingot faces upward.

[0020] S5. The single-sided composite material is returned to the stacking and positioning area, and the adsorption and hoisting mechanism transports the second aluminum sheet and stacks it on the second polished surface to form a double-sided composite material.

[0021] S6. The double-sided composite material passes through the second polishing mechanism again in a composite channel state, and the upper and lower brush rollers are flattened and cleaned again.

[0022] S7. When the double-sided composite passes through the flipping mechanism, the flipping mechanism does not flip. The double-sided composite is directly connected to the binding mechanism and is unloaded after being bound by the binding mechanism.

[0023] Beneficial effects: The reflow production system and process method for aluminum sheet and aluminum ingot grinding composite of the present invention have at least the following advantages:

[0024] The aluminum sheets from the first grinding line's outlet are directly transported across the line to the second grinding line's inlet side using an adsorption and hoisting mechanism, where they are immediately stacked with the finished aluminum ingots. The time from grinding completion to stacking is reduced to seconds, completely eliminating the problem of oxide film regeneration caused by prolonged exposure of the ground surface to air, and significantly improving the bonding strength of the composite interface.

[0025] This invention reuses the second grinding mechanism as a composite channel, applying uniform clamping pressure to the laminated body with a brush roller in a non-grinding state. Under the forced adsorption of the adsorption and hoisting mechanism and the rolling flattening of the brush roller, the warped thin aluminum sheet achieves gapless adhesion with the surface of the aluminum ingot, solving the problem of poor composite adhesion caused by thin plate deformation, while squeezing out residual air between layers.

[0026] By placing the stacked positioning area in front, located on the feed side of the grinding machine, with the air curtain isolation device in place, and with the dust collection continuously activated in the grinding machine's composite channel state, a three-level dust control system of "source isolation - path interception - end collection" is formed. In particular, after the aluminum ingot is flipped, its lower grinding surface (the cleanest surface) is given priority for composite use, further avoiding roller contact contamination.

[0027] Through the double-flipping and recirculation path design of the flipping mechanism, aluminum ingots complete the entire double-sided composite process within a single second grinding line. This eliminates the need for a second stacking device and the need to transfer semi-finished products to other production lines, resulting in reduced equipment investment, space savings, unified positioning benchmarks, and better symmetry of the double-sided composite. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall layout of the reflow production system in Embodiment 1 of the present invention.

[0029] Figure 2 for Figure 1 A schematic diagram showing the relative positions of the flipping mechanism, the suction and hoisting mechanism, and the stacking and positioning area in the embodiment.

[0030] Figure 3 for Figure 1 A schematic diagram of the flipping mechanism and the second grinding machine in the embodiment.

[0031] Figure 4 This is a schematic diagram of the double-sided reflow composite process in Embodiment 2 of the present invention. Detailed Implementation

[0032] The invention will now be further described with reference to the accompanying drawings.

[0033] Example 1, as shown in the appendix Figure 1-3 The aforementioned recirculation production system for aluminum sheet and ingot grinding includes a first grinding line 1, a second grinding line 2, and a suction and hoisting mechanism 3 arranged side by side. The suction and hoisting mechanism 3 spans between the discharge side of the first grinding line 1 and the loading side of the second grinding line 2. This mechanism includes a gantry beam spanning above the two lines, a lateral movement drive unit, a lifting drive unit, and a vacuum suction cup frame. The vacuum suction cup frame has a matrix arrangement of vacuum suction cups, each with independently controlled vacuum on / off.

[0034] The first grinding line 1 is used for single-sided grinding and flipping of aluminum sheets for unloading. It includes a grinding line along a first direction (…). Figure 1 The first grinding mechanism 11, the flipping mechanism 12, and the moving roller conveyor 13, which reciprocates along a first direction, are arranged sequentially from left to right. The first grinding mechanism 11 is a single-sided roller brush grinder that grinds the upper surface of the aluminum sheet. The moving roller conveyor 13 supports and carries the aluminum sheet through the first grinding mechanism 11. A clamping mechanism is also provided on the support surface of the moving roller conveyor 13 to provide a stable upward clamping force on the lower surface of the aluminum sheet when it passes through the first grinding mechanism 11. This clamping force and the downward clamping force formed by the brush rollers create a relative force, so that the first grinding mechanism 11 grinds the upper surface of the aluminum sheet under constant pressure, ensuring the quality of the ground surface of the aluminum sheet.

[0035] The flipping mechanism 12 includes a fixed bracket 121 disposed at one end of the adsorption and hoisting mechanism 3, and two flipping frames respectively hinged to the fixed bracket 121 and the moving roller conveyor 13. The hinge axes of the two flipping frames are parallel to each other and are respectively disposed on the edges of the fixed bracket 121 and the moving roller conveyor 13. This allows the flipping frame on the fixed bracket 121 to flip 180° above the moving roller conveyor 13 when the moving roller conveyor moves to align with the horizontal position of the fixed bracket 121, thereby pressing the aluminum sheet onto the flipping frame on one side of the moving roller conveyor 13. Subsequently, the two flipping frames work together to flip 180° to the side of the fixed bracket, thereby flipping the single-sided polished aluminum sheet 180° so that the polished surface is facing down and transferring it to the fixed bracket 121 for the adsorption and hoisting mechanism 3 to pick up.

[0036] The second grinding line 2 is used for double-sided grinding and lamination of aluminum ingots. It includes grinding lines along a second direction (…). Figure 1The aluminum ingot feeding roller conveyor 25, stacking and positioning area 4, second grinding mechanism 21, flipping mechanism 22, binding mechanism 23 and unloading roller conveyor 24 are arranged sequentially from right to left in the middle.

[0037] The second grinding mechanism 21 is a double-sided roller brush grinding machine, in which the upper and lower opposing brush rollers grind the upper and lower surfaces of the aluminum ingot simultaneously, thereby achieving double-sided grinding of the aluminum ingot; the flipping mechanism 22 is arranged close to the discharge side of the second grinding mechanism 21, and can flip the aluminum ingot that has been double-sided ground 180° around the horizontal axis, while still being located on the second grinding line 2.

[0038] Based on the above production line structure, the workflow for producing single-sided composite panels is as follows: A1. Aluminum sheets are hoisted and loaded onto the moving roller conveyor 13, which drives them through the first grinding mechanism 11. The upper surface is ground by the first grinding mechanism 11, and then flipped by the flipping mechanism 12 so that the ground surface faces down and is placed on the fixed bracket 121 for use.

[0039] A2. The aluminum ingot is hoisted and loaded onto the aluminum ingot loading roller conveyor 25, and actively conveyed by the roller conveyor to the second grinding mechanism 21. The second grinding mechanism 21 performs double-sided grinding on the upper and lower surfaces of the ingot, and after grinding, it continues to move forward to the flipping mechanism 22.

[0040] A3. The flipping mechanism 22 flips the aluminum ingot 180° so that the lower grinding surface (i.e. the first grinding surface) during double-sided grinding faces upward, and then the aluminum ingot flows back to the stacking and positioning area 4.

[0041] A4. The adsorption and hoisting mechanism 3 picks up the aluminum sheet from the fixed bracket 121, moves it horizontally to the top of the stacking positioning area 4, lowers it and smoothly stacks the aluminum sheet on the upper surface of the aluminum ingot, and resets after vacuum release.

[0042] A5. The superimposed single-sided composite moves towards the second grinding mechanism 21, ready for subsequent pressing or direct entry into the composite channel state processing.

[0043] In this embodiment, by setting the stacking positioning area 4 on the feeding side of the second grinding mechanism 21 and setting the flipping mechanism 22 on the discharging side of the second grinding mechanism 21, and cooperating with the reflux path, a compact cycle of "grinding-flipping-refluxing-stacking" of aluminum ingots is realized, and the cleanest lower grinding surface of the aluminum ingot is preferentially used for composite, minimizing the risk of interface contamination.

[0044] Furthermore, during the aluminum ingot reflow process, it inevitably passes through the second grinding mechanism 21, whose dust collection system is always in operation, thus enabling a second dust collection and cleaning treatment of the grinding surface before lamination with the aluminum sheet. When the adsorption and hoisting mechanism 3 suspends the aluminum sheet above the aluminum ingot and lowers it, the high-speed falling airflow (or the airflow generated by electrostatic adsorption) blows away the trace amounts of dust remaining on the surface of the aluminum ingot due to grinding, achieving a non-contact online cleaning effect. This is more uniform and thorough than installing a dedicated blowing nozzle.

[0045] After the above series of processes, the relatively cleaner lower surface from the double-sided grinding is first used for lamination. On this basis, the composite surface is further cleaned by vacuuming during the aluminum ingot reflow process. Finally, during the stacking and lamination process, a natural dust blowing cleaning is performed again. Through triple cleaning, the cleanliness of the composite surface of aluminum ingot and aluminum sheet is optimized. Combined with the extreme reduction of the time from grinding completion to lamination, the bonding strength of the composite interface can be significantly improved.

[0046] In practical applications, it has been found that suction lifting is not just about placing aluminum sheets. If the suction cups release the sheets with a certain downward preload, and there are rigid support rollers below the aluminum ingots, this itself constitutes a pre-composite pressing station. The pressure of the suction cups (usually 0.5-0.7MPa) is used to bond the two layers of aluminum together, expelling the air in between, making it less likely to shift during subsequent bundling.

[0047] Example 2: Based on Example 1, this example further defines the dual-mode function of the second grinding mechanism 22, and realizes the same-line production of double-sided composite panels based on this.

[0048] The second polishing mechanism 21 has a working state and a composite channel state;

[0049] In the working state, the upper and lower grinding heads of the second grinding mechanism 21 rotate at a set speed and perform double-sided grinding on the passing aluminum ingot; for example, the upper and lower brush rollers rotate at a set speed of 800-1200 rpm to grind the aluminum ingot, and the dust collection system is fully open to collect grinding dust.

[0050] In the composite channel state, the upper and lower brush rollers are raised and lowered to a preset clamping position. The gap between these positions is slightly smaller than the total thickness of the aluminum sheet and aluminum ingot composite, for example, 0.1-0.3 mm smaller. They operate at zero speed or a speed lower than the grinding speed, such as ≤30 rpm, so that only the aluminum ingot and aluminum sheet composite passing through is subjected to uniform rolling clamping pressure. The dust collection system of the second grinding mechanism 21 remains on, continuously sucking up the floating dust on the surface and surrounding area of ​​the composite.

[0051] like Figure 4As shown, based on the aforementioned dual-mode functionality, this embodiment provides a double-sided composite process flow, which is achieved through the structural layout of the production line:

[0052] S1. The aluminum ingot is polished on both sides by the second polishing mechanism 21. Its lower surface is the first polishing surface and its upper surface is the second polishing surface. Then it enters the flipping mechanism 22 for the first flipping, so that the first polishing surface faces upward.

[0053] S2. The aluminum ingot is returned to the stacking and positioning area 4. The adsorption and hoisting mechanism 3 transports the first aluminum sheet and stacks it on the first polished surface of the aluminum ingot to form a single-sided composite.

[0054] S3. The single-sided composite body moves forward to the second polishing mechanism 21. The second polishing mechanism 21 switches to the composite channel state. The single-sided composite body passes through under the clamping and pressing of the upper and lower brush rollers. At the same time, the dust collection system performs strong suction cleaning on the second polished surface of the aluminum ingot.

[0055] S4. The single-sided composite material reaches the flipping mechanism 22, which flips it a second time so that the second polished surface of the aluminum ingot faces upward.

[0056] S5. The single-sided composite material is returned to the stacking and positioning area 4, and the adsorption and hoisting mechanism 3 transports the second aluminum sheet and stacks it on the second polished surface to form a double-sided composite material.

[0057] S6. The double-sided composite material passes through the second polishing mechanism 21 again in a composite channel state, and the upper and lower brush rollers are flattened and cleaned again.

[0058] S7. When the double-sided composite passes through the flipping mechanism 22, the flipping mechanism 22 does not flip. The double-sided composite is directly connected to the binding mechanism 23 and is unloaded after being bound by the binding mechanism 23.

[0059] In this embodiment, the flipping mechanism 22 is both a flipping execution element and a flow control element: the first flipping achieves optimal surface sequence, the second flipping ensures the surface to be laminated faces upwards, and the third straight-through achieves finished product output. The entire double-sided lamination process is completed in a closed loop within the same second grinding line, without the need for secondary feeding or additional stacking equipment, ensuring consistent symmetry of the laminated surfaces and minimal cycle time loss.

[0060] Preferably, the flipping mechanism 22 includes a rotating frame 221 and two conveying rollers 222 fixedly installed on the rotating frame 221. The two conveying rollers 222 are symmetrical and parallel to each other with respect to the rotation axis of the rotating frame 221, and a space is formed between the two conveying rollers 222 to accommodate or pass through the aluminum ingot and the composite.

[0061] One of the conveyor rollers 222 is integrated with a pressing mechanism. The pressing structure consists of a hydraulic cylinder and a pressing block. A flexible anti-slip layer is provided on the pressing surface of the pressing block. By driving the pressing block with the hydraulic cylinder, the aluminum ingot or composite located between the two conveyor rollers 222 can be pressed onto the opposite side of the conveyor roller 222, thereby preventing the aluminum ingot and composite from sliding randomly during the flipping process, especially avoiding the relative sliding between the two composite structure layers of the single-sided composite during the flipping process.

[0062] Preferably, a thickness probe (such as a contact linear displacement sensor or a laser displacement sensor) is installed on the clamping structure, and a trigger sensor (such as a limit switch) is installed in the space between the two conveyor rollers 222. The trigger sensor detects whether the aluminum ingot or composite has completely entered the flipping mechanism 22. Upon detection of complete entry, the clamping structure is triggered to clamp the ingot or composite. The thickness probe then measures the thickness of the composite near the clamping point in real time after clamping. The measurement data is uploaded to the production line control system in real time and linked to the batch number and process timestamp of the current product. On one hand, based on the measured thickness, the system can determine whether a single-sided or double-sided composite is entering. Then, based on the executed process flow (single-sided or double-sided composite production), it can choose whether to allow the composite to pass through or flip it and return it, providing a data basis and judgment for process flow decisions. On the other hand, by comparing the actual measured thickness with the preset reference value, the quality of the composite is initially inspected. When a thickness deviation is detected, the control system can mark the defect on the edge of the composite with an inkjet printer after flipping, or directly trigger a sorting command, which will be rejected by the automatic sorting mechanism at the unloading roller conveyor 24. No additional dedicated inspection station is required, and the production line cycle time is not occupied, achieving full online inspection and data traceability of the composite thickness.

[0063] Preferably, to address the issue of the second grinding mechanism 21 generating a large amount of dust during grinding, which may diffuse into the stacking positioning area 4, in this embodiment, both the first grinding mechanism 11 and the second grinding mechanism 21 are connected to the same wet dust removal system 10. Multiple suction ports are fixedly installed relative to the brush rollers of the two grinding mechanisms, thus moving with the brush rollers to form a negative pressure suction space around them. During grinding, this effectively captures the generated flying debris or floating dust. In non-grinding stages, the brush rollers can also be driven to rotate briefly and continuously at high speeds, using centrifugal force combined with negative pressure suction to remove the dust adsorbed on the brush rollers, ensuring that the brush rollers are always clean and creating an excellent working environment for subsequent rolling and flattening operations. This avoids repeated contamination or damage to the composite surface.

[0064] An air curtain isolation device is provided on the feed side and discharge side of the second grinding mechanism 21. The air curtain isolation device includes flat nozzles arranged along the width direction of the roller conveyor, with the nozzle outlets facing obliquely downwards, forming a high-speed downward airflow curtain perpendicular to or at a certain angle to the conveying direction of the roller conveyor. The airflow velocity is not less than 20m / s, forming an aerodynamic isolation barrier.

[0065] When the second grinding mechanism 21 is in operation, the air curtain isolation device is activated simultaneously. The air curtain on the feeding side prevents grinding dust from spreading towards the stacking positioning area 4, while the air curtain on the discharging side prevents dust from flowing with the aluminum ingots to subsequent workstations. When the second grinding mechanism 21 switches to the composite channel state, the air curtain isolation device can selectively close or reduce the wind speed according to the movement direction of the aluminum ingot or composite.

[0066] In this embodiment, air curtain isolation is used to maintain the air cleanliness of the stacking positioning area 4 in an independent environment isolated from the grinding area. The grinding area is at a relatively low pressure, while the stacking positioning area is at a relatively high pressure. During the reflow waiting process, the aluminum ingot no longer adsorbs floating dust, further ensuring the purity of the composite interface.

[0067] Preferably, a lifting centering guide mechanism is installed in the stacking positioning area 4, including width centering baffles on both sides and length positioning baffles at the end, all driven by cylinders to adapt to aluminum ingots of different specifications. This ensures that the aluminum sheets can be accurately stacked with the aluminum ingots. In double-sided composite production, due to the increased thickness of the single-sided composite after the first stacking, when it is returned to the stacking positioning area 4 for secondary composite, the visual recognition reference plane of the adsorption and hoisting mechanism 3 has been raised. If the suction cup descent stroke is fixed, it may lead to impact or incomplete bonding. At this time, the lifting centering guide mechanism can be used to lower the entire single-sided composite to a certain height, ensuring that impact or incomplete bonding will not occur while the suction cup descent stroke remains unchanged. In addition, a laser displacement sensor can be further installed on the suction cup beam to measure the actual height of the composite below in real time, dynamically compensate for the descent stroke, and cooperate with the soft landing operation by using a 0.5-second low-pressure suspension before the suction cup is released, relying on airflow for alignment.

[0068] Preferably, the second grinding mechanism 21 is provided with a centering clamping mechanism 5 on both the feeding side and the discharging side. The centering clamping mechanism 5 includes two clamping rollers that move synchronously closer or further apart. The two clamping rollers rotate in opposite directions but at the same speed, so that the aluminum ingot or composite is adjusted once each time it passes through the second grinding mechanism 21.

[0069] Preferably, the upper brush rollers of both the first grinding mechanism 11 and the second grinding mechanism 21 are driven by a lifting mechanism with a flexible joint. The lifting mechanism includes a hydraulic cylinder fixed to the top of the grinding machine support, with its piston rod extending vertically downwards. A driving block is mounted on the piston rod, and this driving block slides along a vertical groove on the support under the drive of the hydraulic cylinder. The lower part of the driving block is connected to a connecting piece via an air spring, and the lower part of the connecting piece is connected to a bearing seat via an adjustable preload spring structure. The bearing seat is used to install the end bearing of the brush roller main shaft. The connecting piece and the bearing seat are also slidably disposed within the vertical groove. The air spring, the connecting piece, and the adjustable preload spring structure together constitute the flexible joint, which can transmit pressure between the driving block and the bearing seat and achieve a constant pressure floating function. The groove is a rectangular guide groove machined on the side wall of the support. The two sides of the groove are hardened and ground, providing good guiding accuracy and wear resistance.

[0070] In the above process flow, during the grinding or roller clamping flattening stages, after the brush roller contacts the workpiece, it continues to press down slightly, causing the air spring and preload spring to undergo a certain compression deformation, forming the set clamping force. When there are local high points on the workpiece surface, the brush roller floats slightly with the bearing seat, the air spring compresses rapidly to absorb the displacement change, while the pressure of the preload spring remains basically unchanged (its compression change is very small); when there are low points on the workpiece surface, the air spring extends to maintain the contact pressure. Throughout the process, the pressure acting on the brush roller is dominated by the set preload force of the preload spring, maintaining dynamic constancy. This avoids scratches, burns, or vibration marks on the aluminum surface due to sudden pressure changes, significantly improving the surface treatment quality. It achieves dual optimization of grinding quality and roller clamping flattening quality.

[0071] The reflow production line for grinding and compositing aluminum sheets and ingots provided by this invention deeply integrates the two originally independent processes of grinding and compositing through physical layout reconstruction and equipment function reuse, realizing the real-time, on-line, and intensive production of aluminum / aluminum composite panels. This production line can be widely used in the large-scale production of air conditioning heat dissipation composite panels, automotive heat exchanger composite panels, building curtain wall composite panels, and electronic equipment heat exchanger panels, offering advantages such as investment savings, compact footprint, stable product quality, and significantly reduced energy and labor costs, thus possessing extremely high industrial application value.

[0072] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the above principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A reflow production system for composite grinding of aluminum sheets and ingots, characterized in that: Including a first grinding line (1) and a second grinding line (2) arranged side by side; The first grinding line (1) includes a first grinding mechanism (11) and a flipping mechanism (12) arranged sequentially along a first direction. The first grinding mechanism (11) is used to grind one side of the aluminum sheet, and the flipping mechanism (12) is used to flip the finished aluminum sheet so that its grinding surface faces down. The second grinding line (2) includes a second grinding mechanism (21), a flipping mechanism (22), a binding mechanism (23), and a feeding roller conveyor (24) arranged sequentially along the second direction; the second grinding mechanism (21) is used to perform double-sided grinding on the upper and lower sides of the aluminum ingot; the flipping mechanism (22) is arranged adjacent to the discharge side of the second grinding mechanism (21) and is used to flip the aluminum ingot that has been double-sided ground. An adsorption and hoisting mechanism (3) is provided between the discharge side of the first grinding line (1) and the loading side of the second grinding line (2); the adsorption and hoisting mechanism (3) is used to adsorb and transport the aluminum sheet with the grinding surface facing down on the flipping mechanism (12) to the loading side of the second grinding line, and stack the aluminum sheet on the upper surface of the ground aluminum ingot on the loading side of the second grinding line.

2. The reflow production system for aluminum sheet and ingot grinding composite according to claim 1, characterized in that: The second grinding line (2) is provided with an aluminum ingot feeding roller (25) on the feeding side. A stacking positioning area (4) is provided between the aluminum ingot feeding roller (25) and the feeding side of the second grinding mechanism (21). The station where the adsorption hoisting mechanism (3) stacks aluminum sheets on the upper surface of the aluminum ingot is located in the stacking positioning area (4).

3. A reflow production system for aluminum sheet and ingot grinding composite as described in claim 1 or 2, characterized in that: The second polishing mechanism (21) has a working state and a composite channel state; In the working state, the upper and lower grinding heads of the second grinding mechanism (21) rotate at a set speed and perform double-sided grinding on the passing aluminum ingot; In the composite channel state, the upper and lower grinding heads are raised and lowered to the preset clamping position and run at zero speed or lower than the grinding speed to apply clamping pressure to the stack of aluminum ingots and aluminum sheets passing through, and the dust collection system of the second grinding mechanism (21) remains on.

4. The reflow production system for aluminum sheet and ingot grinding composite according to claim 3, characterized in that: The flipping mechanism (22) is used to flip the aluminum ingot that has been polished on both sides for the first time, so that the lower polishing surface of the aluminum ingot is facing up during the double-sided polishing; the aluminum ingot after the first flipping flows back to the stacking positioning area (4) and is stacked with the aluminum sheet transported by the adsorption hoisting mechanism (3) to form a single-sided composite. The single-sided composite material passes through the second polishing mechanism (21) in the state of the composite channel and is flipped a second time by the flipping mechanism (22) so that the other polished surface of the aluminum ingot faces upward; the single-sided composite material after the second flipping flows back to the stacking positioning area (4) and is stacked with another aluminum sheet transported by the adsorption and hoisting mechanism (3) to form a double-sided composite material; The double-sided composite material passes through the second polishing mechanism (21) in the composite channel state and then passes through the flipping mechanism (22) directly to the binding mechanism (23).

5. The reflow production system for aluminum sheet and ingot grinding composite according to claim 1, characterized in that: The first grinding line (1) also includes a moving roller (13) that reciprocates along a first direction for supporting and transporting aluminum sheets through the first grinding mechanism (11).

6. The reflow production system for aluminum sheet and ingot grinding composite according to claim 5, characterized in that: The flipping mechanism (12) includes a fixed bracket (121) disposed at one end of the adsorption and hoisting mechanism (3), and two flipping frames (122) respectively hinged to the fixed bracket (121) and the moving roller conveyor (13). The two flipping frames (122) are configured such that when the moving roller conveyor (13) moves to align with the fixed bracket (121), the two flipping frames (122) cooperate to clamp the polished aluminum sheet, and the aluminum sheet is flipped from the moving roller conveyor (13) and carried to the fixed bracket (121).

7. The reflow production system for aluminum sheet and ingot grinding composite according to claim 1, characterized in that: The adsorption and hoisting mechanism includes a horizontal movement drive unit, a lifting drive unit, and at least one set of vacuum suction cup frames.

8. The reflow production system for aluminum sheet and ingot grinding composite according to claim 1, characterized in that: The flipping mechanism (22) includes a rotating frame (221) and two conveying rollers (222) fixedly installed on the rotating frame (221). The two conveying rollers (222) are symmetrical about the rotation axis of the rotating frame (221) and arranged parallel to each other. A space is formed between the two conveying rollers (222) to accommodate or pass through the aluminum ingot and the composite.

9. A reflow production system for aluminum sheet and ingot grinding composite as described in claim 1 or 2, characterized in that: The second grinding mechanism (21) is provided with an air curtain isolation device on the feed side and the discharge side; the air curtain isolation device is configured to form a high-speed downward airflow curtain that blocks the diffusion of grinding dust to the stacking positioning area (4) and the flipping mechanism (22) when the second grinding mechanism is in working state.

10. A production process method based on the aluminum grinding composite production system according to any one of claims 1-9, characterized in that, The process of achieving double-sided composite manufacturing through the structural layout of the production system includes the following steps: S1. The aluminum ingot is polished on both sides by the second polishing mechanism (21). Its lower surface is the first polishing surface and its upper surface is the second polishing surface. Then it enters the flipping mechanism (22) for the first flipping, so that the first polishing surface faces upward. S2, the aluminum ingot is returned to the stacking and positioning area (4), and the adsorption and hoisting mechanism (3) transports the first aluminum sheet and stacks it on the first polished surface of the aluminum ingot to form a single-sided composite. S3. The single-sided composite body moves forward to the second polishing mechanism (21), the second polishing mechanism (21) switches to the composite channel state, the single-sided composite body passes through under the clamping and pressing of the upper and lower brush rollers, and at the same time the dust collection system performs strong suction cleaning on the second polishing surface of the aluminum ingot. S4. The single-sided composite material reaches the flipping mechanism (22), and the flipping mechanism (22) flips it a second time so that the second polished surface of the aluminum ingot faces upward. S5. The single-sided composite is returned to the stacking and positioning area (4) and the adsorption and hoisting mechanism (3) transports the second aluminum sheet and stacks it on its second polished surface to form a double-sided composite. S6. The double-sided composite material passes through the second polishing mechanism (21) again in a composite channel state, and the upper and lower brush rollers are flattened and cleaned again. S7. When the double-sided composite passes through the flipping mechanism (22), the flipping mechanism (22) does not flip. The double-sided composite is directly connected to the binding mechanism (23) and is unloaded after being bound by the binding mechanism (23).

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