Online quenching water penetrating groove for high-strength and high-brightness aluminum alloy extruded plate for mobile phone

Abstract

The invention relates to the technical field of aluminum alloy heat treatment, in particular to a high-strength and high-brightness aluminum alloy extrusion plate online quenching water penetrating tank for mobile phones, which comprises a bottom plate, two vertical plates vertically fixed on the upper surface of the bottom plate to form a tank body, a first sealing mechanism, a second sealing mechanism, a plate feeding adjusting mechanism and a carrier roller adjusting mechanism. The invention solves the technical problem of poor product performance and profile position caused by poor heat treatment effect of the original quenching through water tank, and effectively improves the yield and the production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum alloy heat treatment, and in particular to an online quenching water trough for an aluminum alloy extruded plate for a high-strength and high-brightness mobile phone. Background Art

[0002] As a key structural component of mobile phones, the demand for mobile phone middle frames will continue to be stable as the overall mobile phone market develops and the demand for replacement exists. High-gloss aluminum alloy mobile phone middle frame plates are one of the mainstream choices. Mobile phone middle frame materials are gradually moving towards high strength, ultra-thinness and high gloss.

[0003] High-strength and high-brightness aluminum alloy extruded sheet for mobile phones is made of aluminum alloy as the basic material. After a series of processing techniques, it has a high-strength aluminum alloy sheet with high brightness effect on the surface. It is mainly used for the middle frame and shell of electronic equipment such as mobile phones. It has the advantages of light weight, strong performance and high surface brightness. It also has good heat dissipation and corrosion resistance.

[0004] In the aluminum extrusion industry, the number of electronic product orders continues to grow. Because electronic products have high requirements for profile performance and position size, the performance requirements for the production of high-strength and high-brightness aluminum alloy extruded plates for mobile phones with a certain alloy grade of 6013 are yield strength ≥370MPa, tensile strength ≥390MPa, elongation ≥8%, and Vickers hardness of 132HV-142HV. Requirements for crystal phase: single phase size <10um, the average size of the largest 10 particles under a 200x magnifying glass <7um, the number of particles above 5um under a 500x viewing scene <40, the average grain size ≤150um, and the maximum grain size ≤300um. The size requirements are verticality ≤0.2mm, cutting slope ≤0.2mm, plane gap ≤0.1mm, twist ≤0.5mm / m, and curvature ≤0.5mm / m.

[0005] The online quenching device is a device that performs quenching treatment immediately when the aluminum profile just leaves the die and is still at a relatively high temperature (usually in the solid solution temperature range) during the aluminum profile extrusion process. Its purpose is to obtain higher strength and hardness and other properties of the aluminum alloy through rapid cooling.

[0006] In order to obtain higher product strength, the aluminum alloy middle frame material has also shifted from the traditional 6063 alloy to the 6-series high-strength alloy and the 7-series high-strength alloy, and the degree of aluminum alloy alloying has gradually increased. Due to the complex alloy composition of the high-alloyed alloy, its precipitation phase has also become complex and varied. For example, a certain 6-series high-strength alloy is rich in a series of multi-size and multi-morphological categories such as β-Mg2Si phase, θ-CuAl2 phase, S-CumgAl2 phase, and Al3Zr phase. In order to obtain a finer and more evenly distributed precipitation phase structure, it is necessary to use an appropriate solution temperature combined with a higher cooling efficiency to reduce the growth and diffusion of the precipitation phase.

[0007] The size of the precipitated phase of the mobile phone middle frame raw material is controlled at the micron level; a higher cooling rate can retain the supersaturated solid solution state at high temperature to room temperature, inhibit the diffusion and precipitation of solute atoms during the cooling process, and reduce the size and distribution of the precipitated phase. It is an essential process basis for the production of high-brightness aluminum alloy middle frame materials, and the required cooling capacity is >20℃ / s.

[0008] When producing high-strength and high-gloss aluminum alloy extruded sheets for mobile phones, the 25MN extruder is equipped with a Φ210mm extrusion barrel. The cooling rate of traditional cooling methods such as air cooling and spray water cooling can no longer meet the requirements of the new process technology. This results in excessive precipitation of Mg2Si secondary terms, poor solid solution effect, and a product tail length of more than 8 meters. The yield rate is only 47.4%, which is far from the ideal yield rate. The main reasons are: 1. Sealing and water leakage issues: (1) The front end of the water tank is poorly sealed and leaks seriously. This causes quenching water to easily enter the front beam outlet, which in turn affects the outlet temperature of the product and has an adverse effect on product quality. (2) Quenching water leaks into the pressure pit, posing a safety hazard. It is necessary to arrange a dedicated person to clean it up every shift, which increases labor costs and safety management difficulties.

[0009] 2. Water temperature and volume issues: If the water tank volume is insufficient, the water temperature is likely to be too high during the production process. High water temperature will greatly reduce the effect of the quenching process and cannot meet the production requirements of high-quality products.

[0010] 3. Product suspension problem: Products are suspended in a large area during water-penetration production, which brings great difficulties to the control and adjustment of surface clearance, and is not conducive to ensuring product accuracy and quality stability.

[0011] 4. Non-quenching zone problem: There is a non-quenching zone in the half-meter part of the front end of the water tank. The existence of this zone has a negative impact on the quenching performance and organizational structure of the product, reduces the mechanical properties of the product and causes excessive precipitation of secondary terms. The product becomes foggy and white, and cannot meet customer needs. Summary of the invention

[0012] In order to solve the quality problems such as substandard size and distribution of aluminum alloy precipitates, unqualified product performance and poor product flatness caused by insufficient cooling capacity and cooling rate of traditional water troughs, the present invention provides an online quenching water trough for high-strength and high-brightness aluminum alloy extruded plates for mobile phones, which solves the technical problem of poor product performance and position difference caused by poor heat treatment effect of the original quenching water trough, and effectively improves the yield and production efficiency.

[0013] The technical solution adopted by the present invention is as follows: An online quenching water trough for high-strength and high-brightness aluminum alloy extruded plates for mobile phones, comprising a bottom plate, two vertical plates forming a trough body are vertically fixed on the upper surface of the bottom plate, and further comprising: The first sealing mechanism is arranged at the entrance of the plate in the trough body, and comprises a first U-shaped plate fixed to the inner walls of the two vertical plates at the entrance, and the inner wall of the first U-shaped plate is provided with a groove into which the sealing plate can be inserted; The second sealing mechanism is arranged at the outlet of the plate in the trough body, and comprises a second U-shaped plate fixed to the inner walls of the two vertical plates at the outlet, and the inner wall of the second U-shaped plate is provided with a groove into which the sealing plate can be inserted; The plate enters the adjustment mechanism, which is arranged on the outside of the first sealing mechanism, and includes a first limit plate fixed to the upper end surfaces of the two vertical plates, and a second limit plate located directly below the first limit plate and fixed to the bottom plate, the first limit plate and the second limit plate are respectively provided with a first sliding hole and a second sliding hole, two vertical rollers are arranged between the first limit plate and the second limit plate, a threaded rod is fixed to the upper end of the roller shaft of the vertical roller, and a first nut is provided at the upper end of the threaded rod after passing through the first sliding hole and matching with the thread thereof, and a limit plate is fixed at the lower end of the roller shaft of the vertical roller after passing through the second sliding hole and being closely attached to the second limit plate; The roller adjustment mechanism is arranged inside the trough body and includes a plurality of rollers. Both ends of the roller shafts of the rollers are respectively fixed to connecting seats. The two connecting seats are respectively attached to the inner walls of the two vertical plates. A lifting rod with an external thread is fixed to the upper end of the connecting seat. The upper end of the lifting rod passes through a side panel arranged on the upper edge of the vertical plate. A second nut and a third nut matching the lifting rod thread are respectively arranged on the upper and lower sides of the side panel.

[0014] Furthermore, it also includes a water inlet mechanism, which includes a crossbeam arranged between two side walls, the number of the crossbeam is at least one, a third sliding hole is opened on the crossbeam, a short rod that slides laterally is arranged in the third sliding hole, the short rod has an external thread, and a fourth nut and a fifth nut that cooperate with the short rod thread are respectively arranged on the upper and lower sides of the crossbeam, and a tubular water inlet is movably connected to the upper end of the short rod. Furthermore, the upper end of the short rod is hinged to the water inlet through a hinge shaft. The function is that the direction of the water flow through the traditional water trough cannot be controlled and adjusted, which affects the gap between the products. The present invention is equipped with a water inlet mechanism with adjustable water inlet direction, which can adjust and control the water inlet angle and direction, so as to flexibly adjust the water flow direction according to production needs and better meet the production process requirements.

[0015] Furthermore, the connecting seat and the lifting rod are located in a guide plate with a U-shaped cross section, and the guide plate is fixed on the inner wall of the vertical plate, so as to provide a guiding effect for the connecting seat when the lifting rod is raised or lowered.

[0016] Furthermore, baffles are vertically welded on the edge of the bottom plate near the plate inlet and the edge in the length direction of the bottom plate, so as to collect and discharge the overflowed water for easy external discharge.

[0017] Furthermore, the bottom plate is provided with a plurality of drainage holes, which are used to facilitate the drainage of overflow water on the bottom plate and accelerate the drainage.

[0018] Furthermore, the bottom plate and the two vertical plates are made of stainless steel. The purpose is to use stainless steel to weld the trough body and roller accessories to prevent overall rust, extend the service life of the equipment, reduce equipment maintenance costs, and improve the overall stability and reliability of the equipment.

[0019] Furthermore, the length of the two vertical plates is 3100mm, the height is 400mm, and the distance between the two vertical plates is 500mm. The purpose is to ensure that the volume requirements are met under the dimensions of length, width and height, so that the water trough can maintain sufficient quenching water during the production process, effectively stabilize the water temperature, ensure a good cooling effect, and improve the quenching quality of the product.

[0020] The beneficial effects of the present invention are: (1) The present invention is provided with sealing mechanisms at both the inlet and outlet ends of the trough body, and the sealing structure adopts a double-layer water blocking plate design to reduce the occurrence of water leakage, prevent quenching water from entering the front beam outlet to affect the product temperature and improve the quenching quality of the plate, while reducing the impact of water leakage on the mold and the pressure pit, effectively avoiding production interruptions caused by water leakage, reducing the water blocking time of the main machine operator, improving production efficiency, eliminating safety hazards, and reducing safety management costs.

[0021] (2) The water trough structure of the present invention can increase the volume of water and stabilize the water flow temperature. At the same time, a plate entry adjustment mechanism is provided at the plate feeding end, which can be flexibly adjusted according to the width of the product to ensure the accurate position of the product in the water trough, improve the quenching effect, and is suitable for plate products of different widths.

[0022] (3) The present invention installs a roller adjustment mechanism inside the trough body, and dynamically adjusts the height of the roller to prevent the product from hanging in the air during the production process, effectively improving the accuracy of product surface gap control and ensuring the product pattern quality.

[0023] (4) The design of the water trough body structure of the present invention shortens the length of the non-quenching zone during quenching treatment, solves the technical problem that the long non-quenching zone affects the quenching performance and organizational structure, and improves the overall quenching performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 It is a structural schematic diagram of Example 1 of a specific implementation method of the present invention.

[0026] Figure 2It is a schematic diagram of the structure of the plate entering the adjustment mechanism according to a specific embodiment of the present invention.

[0027] Figure 3 It is a structural schematic diagram of the roller adjustment mechanism according to a specific embodiment of the present invention.

[0028] Figure 4 It is a schematic diagram of the structure of the water inlet mechanism according to a specific embodiment of the present invention.

[0029] In the figure, 1-bottom plate, 2-baffle, 3-drainage hole, 4-first U-shaped plate, 5-vertical roller, 6-second limit plate, 7-hinge shaft, 8-first limit plate, 9-first slide hole, 10-guide plate, 11-lifting rod, 12-crossbeam, 13-third slide hole, 14-water inlet, 15-roller, 16-second U-shaped plate, 17-vertical plate, 18-side board, 19-connecting seat, 20-second nut, 21-third nut, 22-threaded rod, 23-first nut, 24-second slide hole, 25-limit plate, 26-fourth nut, 27-fifth nut, 28-short rod. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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 should fall within the scope of protection of the present invention.

[0031] Example 1 Combination Figure 1 The present invention provides an online quenching water trough for high-strength and high-brightness aluminum alloy extruded plates for mobile phones, comprising a bottom plate 1, two vertical plates 17 forming a trough body are vertically fixed on the upper surface of the bottom plate 1, and also includes: The first sealing mechanism is arranged at the entrance of the plate in the trough body, and comprises a first U-shaped plate 4 fixed to the inner walls of the two vertical plates 17 at the entrance, and the inner wall of the first U-shaped plate 4 is provided with a groove into which the sealing plate can be inserted; The second sealing mechanism is arranged at the outlet of the plate in the trough body, and includes a second U-shaped plate 16 fixed to the inner walls of the two vertical plates 17 at the outlet, and the inner wall of the second U-shaped plate 16 is provided with a groove into which the sealing plate can be inserted; The plate enters the adjustment mechanism, which is arranged outside the first sealing mechanism and combined with Figure 2The plate entering the adjustment mechanism includes a first limit plate 8 fixed to the upper end surfaces of the two vertical plates 17, and a second limit plate 6 located directly below the first limit plate 8 and fixed to the bottom plate 1. The first limit plate 8 and the second limit plate 6 are respectively provided with a first sliding hole 9 and a second sliding hole 24. Two vertical rollers 5 are arranged between the first limit plate 8 and the second limit plate 6. A threaded rod 22 is fixed to the upper end of the roller shaft of the vertical roller 5. The upper end of the threaded rod 22 passes through the first sliding hole 9 and is provided with a first nut 23 threadably matched therewith. The lower end of the roller shaft of the vertical roller 5 passes through the second sliding hole 24 and is fixed with a limit plate 25 tightly attached to the second limit plate 6.

[0032] The roller adjustment mechanism is set inside the tank body and combined with Figure 3 The roller adjustment mechanism includes a plurality of rollers 15, both ends of the roller shaft of the roller 15 are fixed to the connecting seat 19 respectively, the two connecting seats 19 are respectively attached to the inner walls of the two vertical plates 17, the upper end of the connecting seat 19 is fixed with a lifting rod 11 with an external thread, the upper end of the lifting rod 11 passes through the side 18 set on the upper edge of the vertical plate 17, and the upper and lower sides of the side 18 are respectively provided with a second nut 20 and a third nut 21 that are threadedly matched with the lifting rod 11. The connecting seat 19 and the lifting rod 11 are located in a guide plate 10 with a U-shaped cross section, and the guide plate 10 is fixed to the inner wall of the vertical plate 17.

[0033] Water inlet mechanism, combined Figure 4 The water inlet mechanism includes a crossbeam 12 arranged between two side walls 18, the number of the crossbeam 12 is at least one, a third sliding hole 13 is opened on the crossbeam 12, a short rod 28 for horizontal sliding is arranged in the third sliding hole 1, the short rod 28 has an external thread, and a fourth nut 26 and a fifth nut 27 that are threadably matched with the short rod 28 are respectively arranged on the upper and lower sides of the crossbeam 12, and a tubular water inlet 14 is movably connected to the upper end of the short rod 28, and the upper end of the short rod 28 is hinged to the water inlet 14 through a hinge shaft 7.

[0034] In order to solve the technical problem of collecting and discharging overflow water in the tank, the present invention vertically welds a baffle 2 on the edge of the bottom plate 1 near the plate inlet and the edge in the length direction of the bottom plate 1, and a plurality of drainage holes 3 are provided on the bottom plate 1.

[0035] The base plate 1 and the two vertical plates 17 of the present invention are made of stainless steel, and the length of the two vertical plates 17 is 3100 mm, the height is 400 mm, and the distance between the two vertical plates 17 is 500 mm.

[0036] The working process of the present invention is: (1) By adjusting the fourth nut 26 and the fifth nut 27, the short rod 28 is slid horizontally to the water inlet position required by the process and then fixed. The water inlet 14 is connected to the water inlet pipe and then adjusted to the angle required by the process.

[0037] (2) The plate formed by extrusion of high-strength and high-brightness aluminum alloy for mobile phones is pulled into the water trough, and the plate passes through the plate adjustment mechanism, the first sealing mechanism, the roller adjustment mechanism, the second sealing mechanism in sequence and then is led out. The plate body is arranged close to the bottom of the trough body; (3) The two vertical rollers 5 are slid and fixed by adjusting the first nut 23, so that the two vertical rollers 5 are close to the two sides of the plate to form a limit in the width direction, and the second nut 20 and the third nut 21 are adjusted so that each lifting rod 11 is raised and drives the rollers 15 to be close to the lower surface of the plate to form a support, and finally the sealing plate is inserted into the first U-shaped plate 4 and the second U-shaped plate 16; (4) Water is passed through the water inlet 14 so that the water inlet speed is greater than the overflow speed, thereby meeting the quenching water temperature requirement and completing the quenching treatment of the extruded plate.

[0038] The profile produced by the water trough quenching of the present invention has a yield strength of 379-383MPa, a tensile strength of 394-396MPa, an elongation of 10%, and a Vickers hardness of 138-142MPa. The crystal phase requirements and the average grain size can meet the technical requirements. The dimensional accuracy is verticality ≤0.2mm, cutting slope ≤0.2mm, plane gap ≤0.1mm, twist ≤0.5mm / m, and curvature ≤0.5mm / m. The yield rate is increased from 47.4% to 72.4%.

[0039] Although the present invention has been described in detail with reference to the accompanying drawings and in combination with the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, a person of ordinary skill in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions shall be within the scope of the present invention. Any person of ordinary skill in the art may easily think of changes or substitutions within the technical scope disclosed by the present invention, and these shall be within the scope of protection of the present invention.

Claims

1. An online quenching water trough for high-strength and high-brightness aluminum alloy extruded plates for mobile phones, comprising a bottom plate, on the upper surface of which two vertical plates forming a trough body are vertically fixed, characterized in that: Also includes: The first sealing mechanism is arranged at the entrance of the plate in the trough body, and comprises a first U-shaped plate fixed to the inner walls of the two vertical plates at the entrance, and the inner wall of the first U-shaped plate is provided with a groove into which the sealing plate can be inserted; The second sealing mechanism is arranged at the outlet of the plate in the trough body, and comprises a second U-shaped plate fixed to the inner walls of the two vertical plates at the outlet, and the inner wall of the second U-shaped plate is provided with a groove into which the sealing plate can be inserted; The plate enters the adjustment mechanism, which is arranged on the outside of the first sealing mechanism, and includes a first limit plate fixed to the upper end surfaces of the two vertical plates, and a second limit plate located directly below the first limit plate and fixed to the bottom plate, the first limit plate and the second limit plate are respectively provided with a first sliding hole and a second sliding hole, two vertical rollers are arranged between the first limit plate and the second limit plate, a threaded rod is fixed to the upper end of the roller shaft of the vertical roller, and a first nut is provided at the upper end of the threaded rod after passing through the first sliding hole and matching with the thread thereof, and a limit plate is fixed at the lower end of the roller shaft of the vertical roller after passing through the second sliding hole and being closely attached to the second limit plate; The roller adjustment mechanism is arranged inside the trough body and includes a plurality of rollers. Both ends of the roller shafts of the rollers are respectively fixed to connecting seats. The two connecting seats are respectively attached to the inner walls of the two vertical plates. A lifting rod with an external thread is fixed to the upper end of the connecting seat. The upper end of the lifting rod passes through a side panel arranged on the upper edge of the vertical plate. A second nut and a third nut matching the lifting rod thread are respectively arranged on the upper and lower sides of the side panel.

2. The high-strength and high-brightness aluminum alloy extruded sheet for mobile phones as claimed in claim 1 is characterized in that: It also includes a water inlet mechanism, which includes a crossbeam arranged between two side walls, the number of the crossbeam is at least one, a third sliding hole is opened on the crossbeam, a short rod that slides laterally is arranged in the third sliding hole, the short rod has an external thread, and a fourth nut and a fifth nut that cooperate with the short rod thread are respectively arranged on the upper and lower sides of the crossbeam, and a tubular water inlet is movably connected to the upper end of the short rod.

3. The high-strength and high-brightness aluminum alloy extruded sheet for mobile phones as claimed in claim 2 is characterized in that: The upper end of the short rod is hinged to the water inlet through a hinge shaft.

4. The high-strength and high-brightness aluminum alloy extruded sheet for mobile phones as claimed in claim 1 is characterized in that: The connecting seat and the lifting rod are located in a guide plate with a U-shaped cross section, and the guide plate is fixed on the inner wall of the vertical plate.

5. The high-strength and high-brightness aluminum alloy extruded sheet for mobile phones as claimed in claim 1 is characterized in that: Baffles are vertically welded on the edge of the bottom plate near the plate inlet and the edge in the length direction of the bottom plate.

6. The high-strength and high-brightness aluminum alloy extruded sheet for mobile phones as claimed in claim 5 is characterized in that: A plurality of drainage holes are arranged on the bottom plate.

7. The high-strength and high-brightness aluminum alloy extruded sheet for mobile phones as claimed in claim 1 is characterized in that: The base plate and two vertical plates are made of stainless steel.

8. The high-strength and high-brightness aluminum alloy extruded sheet for mobile phones as claimed in claim 1 is characterized in that: The length of the two vertical boards is 3100mm, the height is 400mm, and the distance between the two vertical boards is 500mm.

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