Aluminum alloy bolt, continuous solid solution annealing furnace for producing aluminum alloy bolt and use method of continuous solid solution annealing furnace

Abstract

The invention discloses an aluminum alloy bolt, a continuous solid solution annealing furnace for producing the aluminum alloy bolt and a use method of the continuous solid solution annealing furnace. The problems that an aluminum alloy bolt is low in hardness and prone to installation dislocation, heated blind areas exist in accumulated materials in the annealing process, and quenching delay is caused by heat overflow are solved. The rod end of the bolt is provided with an annular conical surface to realize mounting self-guiding; a heat conduction structure is arranged in the annealing furnace heating box, scanning type heating is achieved through dynamic swing of a heat conduction arc plate, and blind areas are eliminated; the cooling box is provided with a heat insulation structure, a material frame touches a mechanical structure to drive a closing plate to be opened and closed, and heat convection is blocked. The method can effectively prevent installation damage of the bolt, ensures annealing heating uniformity and cooling efficiency, and improves the mechanical property of the bolt.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bolt processing, in particular to an aluminum alloy bolt, a continuous solid solution annealing furnace for producing the aluminum alloy bolt and a use method of the continuous solid solution annealing furnace. BACKGROUND

[0002] In the field of mechanical manufacturing and assembly, bolts, as key fasteners, play an irreplaceable role. Aluminum alloy bolts, with their light weight and corrosion resistance, have been widely used in industries such as aerospace and automobile manufacturing, which are sensitive to weight and require good corrosion resistance.

[0003] The existing aluminum alloy bolts and their production process still have engineering pain points in actual application: due to the lower hardness of aluminum alloy material compared to steel, the shear resistance is relatively weak. In the actual assembly process, if the bolt is not completely perpendicular to the installation hole, it is easy to cause thread misalignment in the moment of screwing. This initial misalignment can cause aluminum chips to peel off or even the thread to "bite" when forced to tighten, directly causing the workpiece or bolt to be scrapped, affecting assembly efficiency and connection reliability.

[0004] In the solid solution annealing link of producing aluminum alloy bolts, the traditional continuous annealing furnace has the following deep thermodynamic problems: 1. In continuous production, bolts are usually randomly stacked in the material frame. The traditional circulating fan often uses a fixed air outlet angle, which makes the bolts in the interior of the stack or the leeward side long-term in the "thermal shadow zone". Even if the hot air is circulated, this fixed angle shielding will cause a difficult-to-eliminate temperature gradient between the center and the edge of the material frame, causing large mechanical property dispersion of the same batch of bolts.

[0005] 2. In order to ensure the continuous operation of the conveying belt, the traditional equipment often retains a constant open channel between the heating section and the cooling section. This not only causes heat waste, but more seriously, the high-temperature gas flow in the heating section will continuously flow into the cooling section along the channel, forming a "high-temperature buffer zone" before spray cooling. This makes the just-out-of-furnace bolts unable to rapidly reduce the temperature through radiation and natural convection for a period of time before contacting the cooling liquid, and even maintain a high temperature, causing the decomposition of the supersaturated solid solution after solid solution or the grain coarsening before entering the medium, i.e. the "quenching delay" phenomenon, which seriously affects the final material strength and corrosion resistance. SUMMARY

[0006] The present application is derived from the actual research on the solid solution annealing process of aluminum alloy bolts: in the research and development process, we observed that the traditional furnace heat overflowed and wasted, the cooling was uneven, and the heating of the bolts was uneven, affecting the quality. In order to solve these engineering problems, a continuous furnace integrating heat conduction and heat insulation is designed.

[0007] For uneven heating, a heat conduction structure is introduced, including a heat collecting plate and a heat conduction arc plate. The fan circulates hot air, and the arc plate guides the hot air in multiple directions. It is based on convection optimization: bottom and side heating ensures uniformity. The advantage is that the heat distribution is logically balanced, which can reduce temperature gradient and improve quality compared with the simple heating of the prior art.

[0008] To prevent heat from spreading, a heat insulation structure is developed. The material frame pushes the rotating rod to link the closing plate to open and close. Automatic heat blocking, avoid waste. Compared with the existing open furnace, the benefit is heat insulation, which improves cooling efficiency and saves energy. The cooling structure sprays liquid cooling and collects steam heat recovery.

[0009] In order to achieve the above purpose, the application adopts the following technical scheme: The aluminum alloy bolt comprises a bolt head, a rod portion integrally formed at the bottom of the bolt head, a thread provided on the outer wall of the rod portion, an annular taper provided at the bottom end of the rod portion, and a hexagonal groove formed at the top of the bolt head.

[0010] Further, the bottom of the bolt head is fixed with an annular guide rail with the rod portion as the center, and the outer wall of the annular guide rail is slidably sleeved with a grommet.

[0011] A continuous solid solution annealing furnace for producing aluminum alloy bolts is used for solid solution annealing of the above-mentioned aluminum alloy bolts, comprising a conveying belt and an annealing furnace body, the conveying belt penetrates through the annealing furnace body, the annealing furnace body is composed of a preheating box, a heating box and a cooling box, and the preheating box, the heating box and the cooling box are arranged in sequence from left to right, and the heating box is connected with the preheating box and the cooling box through openings; A plurality of material frames for containing aluminum alloy bolts are placed on the conveying belt; A plurality of heating modules are arranged on the inner walls of the opposite sides of the heating box, and a heat conduction structure is arranged in the heating box for fully and uniformly heating the aluminum alloy bolts in the material frame; A plurality of heat insulation structures arranged in sequence from left to right are arranged in the cooling box for blocking the heat in the heating box from overflowing outward through the cooling box; A cooling structure is arranged on the side of the plurality of heat insulation structures away from the heating box for cooling the aluminum alloy bolts in the material frame.

[0012] Further, the heat conduction structure comprises a heat collecting plate and two heat conduction arc plates, and further comprises a plurality of air guides I fixed on the two sides of the heating box through a rack, the air inlet ends of the plurality of air guides I are connected with a plurality of heat recovery pipes, one end of the plurality of heat recovery pipes extends into the heating box, and the communication position of the heat recovery pipe and the heating box is located above the heating module, and the air outlet ends of the air guides I are communicated with the heat collecting plate through a pipeline to guide the hot air collected on the top of the heating box into the heat collecting plate. The top of the heat collecting plate is provided with a plurality of air outlets, and the heat collecting plate penetrates the conveying belt, so that hot air is blown out from bottom to top through the air outlets to heat the aluminum alloy bolts in the frame from the bottom. A plurality of bases are fixed on the inner walls of the opposite sides of the heating box, a plurality of connecting ears are rotatably connected in the bases, and the connecting ears are fixedly connected with the corresponding heat-conducting arc plates, so that the hot air blown out of the air outlets is guided to the direction of the frame through the heat-conducting arc plates. The heating box is fixed with a heat insulation plate I located below the heat collecting plate.

[0013] Compared with the traditional single-side heating, the heat-conducting structure improves the uniformity of bolt heating and the pass rate of solid solution annealing through multi-directional heating of the upper and lower sides.

[0014] Further, the heat insulation structure comprises a heat insulation plate II fixed in the cooling box, and the conveying belt penetrates the heat insulation plate II. The heat insulation structure further comprises a discharge port provided on the heat insulation plate II, and the conveying belt penetrates the discharge port. A sealing plate is sealingly and slidingly arranged in the cooling box and slidingly matched with one side of the heat insulation plate II, and is used for sealing the discharge port. The top end of the sealing plate extends above the cooling box, L-shaped plates are fixed on both sides of the sealing plate, the L-shaped plates are located above the cooling box, and a pin shaft is fixed on the L-shaped plate. A rotating shaft rotatably penetrates the cooling box and is located at the side of the heat insulation plate II close to the heating box, a plurality of push plates are fixedly sleeved on the outer wall of the rotating shaft, and the push plates are matched with the frame. When the conveying belt carries the frame to move, the frame can drive the push plates to rotate. Both ends of the rotating shaft extend out of the cooling box and are fixed with rotating rods, sliding grooves are formed in the rotating rods, the sliding grooves are slidingly matched with the pin shaft, and when the rotating rod rotates, the L-shaped plate and the sealing plate can be driven to rise through the cooperation of the sliding groove and the pin shaft to open the discharge port.

[0015] Compared with the traditional open channel, the sealing design of the heat insulation structure reduces the heat energy overflow and improves the cooling efficiency.

[0016] Further, the cooling structure comprises a liquid storage tank fixed on the top of the cooling box, a plurality of liquid spraying pipes are fixed in the cooling box below the liquid storage tank, a plurality of liquid guide pipes are connected to the top of the liquid spraying pipes, and the top ends of the liquid guide pipes extend into the liquid storage tank to guide the cooling liquid in the liquid storage tank into the liquid spraying pipes. A plurality of nozzles are arranged on the bottom of the liquid spraying pipe to spray the cooling liquid downward to cool the aluminum alloy bolts. A collection box is fixed on the bottom of the cooling box below the liquid spraying pipe to collect the used cooling liquid. Two steam traps are arranged on the two sides of the liquid storage tank, and the bottom ends of the two steam traps extend into the cooling tank for collecting water vapor generated in the cooling process; A U-shaped pipe is arranged, and the two ends of the U-shaped pipe are communicated with the top of the two steam traps; An air blower II is fixed on the top of the liquid storage tank, and the air inlet end of the air blower II is communicated with the U-shaped pipe through an air inlet pipe; the air outlet end of the air blower II is connected with an external heat exchanger through an air outlet pipe, so as to guide the collected water vapor out and perform heat recovery.

[0017] Further, the heating tank is penetrated by two push blocks on the two sides, and the end of the two push blocks close to each other is slidably contacted with the corresponding heat conduction arc plate, so as to adjust the inclination angle of the heat conduction arc plate, and guide the hot air to the material frame by the heat conduction arc plate. The top end of the heat conduction arc plate is fixed with a plurality of bearing balls.

[0018] Further, the heat insulation plate II and the sealing plate are made of ceramic fiber plates.

[0019] Further, the heating tank is slidably connected with a sliding block on the two sides, and the end of the two sliding blocks close to the cooling tank is rotatably connected with the two rotating rods located on the leftmost side through a connecting rod. The rectangular slot is provided with a guide slot on the top inner wall and the bottom inner wall. The two sliding blocks are fixed with a pin rod, and the two ends of the pin rod are slidably arranged in the adjacent guide slots. When the rotating rod rotates, the sliding block can be moved by the connecting rod, and then the push block can be driven to move by the cooperation of the pin rod and the guide slot, so as to change the pushing effect of the push block on the heat conduction arc plate, thereby adjusting the inclination angle of the heat conduction arc plate.

[0020] In the application, the method for using the continuous solid solution annealing furnace for producing aluminum alloy bolts comprises the following steps: S1, feeding and preheating: placing the aluminum alloy bolts to be solid solution annealed in the material frame, and conveying the material frame to the preheating tank through the conveying belt; using the heat in the heating tank to overflow the hot air in the preheating tank through the communication opening, and preheating the aluminum alloy bolts to be treated; S2, heating and circulating solid solution: conveying the material frame to the heating tank, heating the air in the tank by the heating module to maintain the solid solution annealing temperature; starting the air blower I, sucking the hot air gathered at the top of the heating tank and blowing it from bottom to top to the material frame through the air outlet holes of the heat collecting plate; at the same time, using the heat conduction arc plate to guide part of the hot air to the side of the material frame, realizing multi-angle heating; S3, the material is linked with sealing: when the conveying belt transports the material frame from the heating box to the cooling box, the material frame abuts and pushes the push plate to rotate; the push plate drives the rotating shaft and the rotating rod to rotate, the sliding groove on the rotating rod and the sliding fit of the pin shaft are used to drive the L-shaped plate and the closing plate to move up, the discharge opening is opened for the material frame to pass through; when the material frame completely passes through the heat insulation plate II, the closing plate resets and moves down to reseal the discharge opening to block the heat overflow; S4, cooling and heat recovery: when the material frame moves to the lower part of the liquid spraying pipe, the cooling liquid in the liquid storage tank is atomized and sprayed out through the liquid spraying pipe to quench the aluminum alloy bolt; the negative pressure generated by the induced draft fan II is used to extract the steam generated in the cooling process through the steam collecting hood and the U-shaped pipe, and the steam is transported to the external heat exchanger for heat recovery; S5, dynamic uniform heating adjustment: while the closing plate performs the opening and closing actions in step S3, the rotating rod pulls or pushes the sliding block to move through the connecting rod; the sliding block drives the push block to reciprocate in the direction perpendicular to the conveying direction by cooperating with the inclined guide groove through the pin rod; the movement of the push block changes the abutment position of the push block to the heat conduction arc plate, and cooperates with the gravity reset action of the heat conduction arc plate itself to make the heat conduction arc plate swing, thereby intermittently changing the angle of the hot air blowing to the material frame.

[0021] Beneficial effects: 1. The annular taper is arranged at the bottom end of the rod, and the taper is used for guiding to automatically correct a small inclination angle at the moment when the bolt contacts the mounting hole, so that the thread is correctly engaged, the thread misalignment, seizure or tooth disorder caused by the low hardness of the aluminum alloy is avoided, and the fault tolerance and success rate of assembly are improved.

[0022] 2. The dynamic heat conduction structure is adopted. The mechanical energy during the conveying of the material frame is used to drive the push block in the heating box to reciprocate through the linkage of the rotating rod and the sliding block, and then the heat conduction arc plate is periodically swung. This design makes the hot air no longer blow to the material frame at a fixed angle, but realizes dynamic scanning heating at multiple angles, effectively eliminates the constant "heat shadow area" behind the stacked bolts, and significantly improves the uniformity of the temperature field in the furnace during batch processing.

[0023] 3. The heat insulation structure is adopted. In the non-passing state, the closing plate completely cuts off the air communication between the heating box and the cooling box, and eliminates the "high temperature buffer area". Only when the material frame reaches and passes through the mechanical trigger, the discharge opening is temporarily opened. This strict physical isolation ensures that the temperature of the environment can drop sharply when the bolt leaves the heating area and enters the cooling area, and cooperates with the subsequent spraying system to realize the ideal quenching effect, and maximizes the retention of the excellent crystal phase organization after solid solution treatment.

[0024] 4. The heat conduction structure of the continuous solid solution annealing furnace of the present application realizes multi-directional uniform heating, the heat insulation structure realizes sealing and opening through linkage of the material frame, and the cooling structure comprises atomized liquid spraying and steam recovery, so that the solid solution annealing effect and energy saving efficiency are improved through cooperation of the three, and each part cooperates to form an efficient and energy-saving production system. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 A three-dimensional structural schematic diagram of the aluminum alloy bolt provided by the present application; Figure 2 A three-dimensional exploded structural schematic diagram of the aluminum alloy bolt provided by the present application; Figure 3 A three-dimensional structural schematic diagram of the continuous solid solution annealing furnace for producing the aluminum alloy bolt provided by the present application; Figure 4 A sectional structural schematic diagram of the continuous solid solution annealing furnace for producing the aluminum alloy bolt provided by the present application; Figure 5 A sectional structural schematic diagram of the heating box of the continuous solid solution annealing furnace for producing the aluminum alloy bolt provided by the present application; Figure 6 A three-dimensional exploded structural schematic diagram of the heat collecting plate, air blower I and heat insulation plate I of the continuous solid solution annealing furnace for producing the aluminum alloy bolt provided by the present application; Figure 7 A three-dimensional exploded structural schematic diagram of the heat conduction arc plate, base and pushing block of the continuous solid solution annealing furnace for producing the aluminum alloy bolt provided by the present application; Figure 8 A three-dimensional sectional structural schematic diagram of the cooling box of the continuous solid solution annealing furnace for producing the aluminum alloy bolt provided by the present application; Figure 9 A three-dimensional exploded structural schematic diagram of the liquid storage tank, liquid spraying pipe and steam collecting cover of the continuous solid solution annealing furnace for producing the aluminum alloy bolt provided by the present application; Figure 10 A three-dimensional structural schematic diagram of the closing plate, heat insulation plate II and rotating shaft of the continuous solid solution annealing furnace for producing the aluminum alloy bolt provided by the present application; Figure 11 A three-dimensional exploded structural schematic diagram of the L-shaped plate, rotating shaft and rotating rod of the continuous solid solution annealing furnace for producing the aluminum alloy bolt provided by the present application; Figure 12 A three-dimensional sectional structural schematic diagram of the heating box of the continuous solid solution annealing furnace for producing the aluminum alloy bolt provided by the present application; Figure 13 A three-dimensional structural schematic diagram of the connecting rod and rotating rod of the continuous solid solution annealing furnace for producing the aluminum alloy bolt provided by the present application; Figure 14 A three-dimensional structural schematic diagram of the connecting rod and rotating rod of the continuous solid solution annealing furnace for producing the aluminum alloy bolt provided by the present application;Figure 13 Enlarged structural schematic view at A in the middle.

[0026] In the figure: 1, bolt head; 2, shank; 3, hexagonal groove; 4, annular guide rail; 5, grommet; 6, thread; 7, annular taper; 8, conveyor belt; 9, preheating box; 10, heating box; 11, cooling box; 12, material frame; 13, heating module; 14, heat insulation plate I; 15, heat collecting plate; 16, air outlet; 17, air blower I; 18, regenerative tube; 19, base; 20, heat-conducting arc plate; 21, connecting lug; 22, load-bearing ball; 23, push block; 24, heat insulation plate II; 25, discharge port; 26, closure plate; 27, L-shaped plate; 28, rotating shaft; 29, push plate; 30, rotating rod; 31, sliding groove; 32, pin shaft; 33, liquid storage tank; 34, liquid injection pipe; 35, liquid guide pipe; 36, steam collecting cover; 37, U-shaped pipe; 38, air blower II; 39, collection box; 40, connecting rod; 41, sliding block; 42, rectangular groove; 43, guide groove; 44, pin rod. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all.

[0028] In one embodiment: with reference to Figure 1 and Figure 2 aluminum alloy bolt, including bolt head 1, shank 2, annular taper 7, hexagonal groove 3, annular guide rail 4 and grommet 5, the bolt head 1 is cylindrical structure, the bottom of which is integrally formed with the shank 2, and the outer wall of the shank 2 is provided with a thread 6. The pitch and tooth type of the thread 6 are designed according to the actual application scene and connection requirements, generally the pitch is between 0.5-2mm, and the tooth type is the common triangular tooth type. To ensure good cooperation and connection strength with the thread 6 hole. The bottom end of the shank 2 is provided with an annular taper 7, and the taper of the annular taper 7 is between 10°-30°. Such taper design facilitates the guidance of the shank 2 into the thread 6 hole. When installing, the annular taper 7 first contacts the thread hole, and as the bolt is screwed in, the shank 2 can be smoothly guided into the thread 6 hole, reducing the jamming phenomenon during installation.

[0029] That is, the annular taper 7 serves as a "probe" during installation, and in the initial stage of screwing in the bolt, the taper physical property is used to forcibly guide the shank 2 of the bolt to the center axis of the installation hole, effectively preventing damage to the starting end of the aluminum alloy thread due to deviation of the operation angle.

[0030] with reference to Figure 1The top of the bolt head 1 is provided with a hexagonal groove 3, the size of which is designed according to the commonly used hexagonal wrench specifications, and the depth is between 3-8mm. The width matches the opposite side size of the hexagonal wrench. It is convenient to drive the bolt head 1 to rotate by the hexagonal wrench, and the tightening and loosening operation of the bolt is realized.

[0031] With reference to Figure 2 The bottom of the bolt head 1 is fixed with an annular guide rail 4 with the rod part 2 as the center, and the diameter is determined according to the size of the bolt head 1. Generally between 5-15mm, the outer wall of the annular guide rail 4 is slidably sleeved with a spacer ring 5, the inner diameter of the spacer ring 5 is matched with the outer diameter of the annular guide rail 4, and the spacer ring 5 can be smoothly slid on the annular guide rail 4. In the process of tightening the bolt head 1 and the rod part 2, the spacer ring 5 contacts the workpiece to be fastened, and the pressure on the workpiece to be fastened is increased through the spacer ring 5, so that the pressure distribution is more uniform. At the same time, the cooperation of the annular guide rail 4 and the spacer ring 5 can reduce the friction between the bolt head 1 and the workpiece to be fastened during tightening, reduce the resistance during operation, improve the installation efficiency, and avoid the wear of the workpiece surface.

[0032] With reference to Figures 5-12 The continuous solid solution annealing furnace for producing aluminum alloy bolts relates to the technical field of bolt processing, and is used for solid solution annealing of the above-mentioned aluminum alloy bolts. The continuous solid solution annealing furnace comprises a conveying belt 8, an annealing furnace body, a material frame 12, a heating module 13, a heat conduction structure, a heat insulation structure, a cooling structure, a pushing block 23, a connecting rod 40 and a sliding block 41. The conveying belt 8 penetrates through the annealing furnace body, and the annealing furnace body is composed of a preheating box 9, a heating box 10 and a cooling box 11. The preheating box 9, the heating box 10 (the inner wall of which is made of high-temperature-resistant stainless steel and can withstand a high temperature of 300-600 DEG C without deformation risk) and the cooling box 11 are arranged in sequence from left to right. The heating box 10 is connected with the preheating box 9 and the cooling box 11 through openings. The conveying belt 8 is a stainless steel mesh belt conveyor, and the running speed can be adjusted in a range of 0.1-1 m / min, so as to ensure that the residence time of the aluminum alloy bolts in each processing stage meets the process requirements.

[0033] With reference to Figure 1 A plurality of material frames 12 for containing aluminum alloy bolts are placed on the conveying belt 8. The inside of the material frame 12 is provided with a plurality of partition areas, so as to place the aluminum alloy bolts neatly and prevent the bolts from colliding with each other during the conveying process.

[0034] With reference to Figure 4 and Figure 5The heating box 10 is fixed with a plurality of heating modules 13 on the inner walls of the two sides away from each other. The heating module 13 is selected as a resistance wire heater, the power of which is determined according to the volume of the heating box 10 and the heating requirement, and the power of a single heating module 13 is between 1-5 kW. The plurality of heating modules 13 are uniformly distributed on the two inner walls of the heating box 10 to ensure the temperature uniformity in the heating box 10. The temperature control range in the heating box 10 is between 300-600℃, the temperature is monitored in real time by a temperature sensor, and the signal is fed back to a control system, the control system adjusts the power of the heating module 13 according to the set temperature parameter to realize accurate temperature control.

[0035] Referring to Figures 4-7 In order to be able to fully and uniformly heat the aluminum alloy bolts in the material frame 12, a heat conduction structure is arranged in the heating box 10. The heat conduction structure includes a heat collecting plate 15, two heat conduction arc plates 20, an air blower I 17, a heat recovery pipe 18, a base 19 and a connecting lug 21. The heat collecting plate 15 is made of a metal plate with good heat conduction performance, such as a copper plate, and its length is adapted to the width of the heating box 10. The heat collecting plate 15 is fixed in the heating box 10. A plurality of air outlets 16 are arranged on the top of the heat collecting plate 15, which is used to blow the heat from the bottom to the top to heat the aluminum alloy bolts in the material frame 12. The two heat conduction arc plates 20 are also made of heat conducting metal materials. The top end of the heat conduction arc plate 20 is fixed with a plurality of bearing balls 22, which are steel balls, used to adjust the inclination state of the heat conduction arc plate 20. A plurality of bases 19 are fixed on the inner walls of the two sides of the heating box 10 away from each other, and the base 19 is made of a high-temperature resistant material, such as a nickel-based high-temperature alloy and a cobalt-based high-temperature alloy. A plurality of connecting lugs 21 are rotatably connected in the bases 19, the connecting lug 21 is fixedly connected with the corresponding heat conduction arc plate 20, and is used to guide the heat blown out of the air outlet 16 to the material frame 12 through the heat conduction arc plate 20. A heat insulation plate I 14 is fixed below the heat collecting plate 15 in the heating box 10, the heat insulation plate I 14 is made of a ceramic fiber plate with a thickness of 20-50 mm, which is used to reduce the heat loss downward and improve the heating efficiency.

[0036] Referring to Figure 5 and Figure 6 The air blower I 17 is selected as a centrifugal air blower. A plurality of air blowers I 17 are fixed on the two sides of the heating box 10 through a rack, and the air inlet end of each air blower I 17 is fixed with a heat recovery pipe 18. One end of the heat recovery pipe 18 is fixed to extend into the heating box 10, and the position where the heat recovery pipe 18 communicates with the heating box 10 is located above the heating module 13, which is used to guide the heat collected on the top inner wall of the heating box 10 into the heat collecting plate 15. The air outlet end of the air blower I 17 is fixedly communicated with the heat collecting plate 15 through a pipeline.

[0037] In the working process, the heating module 13 operates to heat the air inside the heating box 10, and performs the solution annealing operation. Then the air blower I 17 operates to suck the hot air gathered on the inner wall of the top of the heating box 10 through the regenerative pipe 18, and then injects the hot air into the heat collection plate 15. The hot air blown out of the air outlet hole 16 heats the aluminum alloy bolts in the material frame 12 from below. In addition, the hot air blown out of the air outlet hole 16 heats the material frame 12 from the side under the guidance of the heat-conducting arc plate 20, so that the aluminum alloy bolts inside the material frame 12 can be heated in different directions, so that the aluminum alloy bolts are uniformly heated.

[0038] With reference to Figure 8 and Figure 10 , the cooling box 11 is provided with a plurality of heat insulation structures arranged in sequence from left to right, for blocking the heat in the heating box 10 from overflowing to the outside through the cooling box 11. The heat insulation structure includes a heat insulation plate II 24, a discharge port 25, a closing plate 26, an L-shaped plate 27, a pin shaft 32, a rotating shaft 28, a rotating rod 30, a sliding groove 31 and a pushing plate 29 fixed in the cooling box 11. The heat insulation plate II 24 is made of ceramic fiber plate material. The discharge port 25 is arranged in the heat insulation plate II 24 for the conveying belt 8 and the material frame 12 to pass through. One end of the conveying belt 8 penetrates through the discharge port 25. The closing plate 26 is also made of ceramic fiber plate material, and is slidingly penetrated in the cooling box 11 and slidingly matched with one side of the heat insulation plate II 24, for closing the discharge port 25. The top end of the closing plate 26 extends above the cooling box 11, and the length and width thereof are determined according to the size of the discharge port 25, so as to ensure that the discharge port 25 can be completely closed.

[0039] With reference to Figure 4 , Figure 8 , Figure 10 and Figure 11 , both sides of the closing plate 26 are fixed with the L-shaped plate 27, and the L-shaped plate 27 is located above the cooling box 11. Both sides of the L-shaped plate 27 are fixed with the pin shaft 32. The rotating shaft 28 is rotatingly penetrated in the cooling box 11, and the rotating shaft 28 is located at the side of the heat insulation plate II 24 close to the heating box 10. Both ends of the rotating shaft 28 extend to one side of the cooling box 11 and are both fixed with the rotating rod 30, and the rotating rod 30 is provided with the sliding groove 31, and the sliding groove 31 is slidingly matched with the pin shaft 32, for driving the L-shaped plate 27 to move up and remove the closing of the discharge port 25 when the rotating rod 30 rotates. The outer wall of the rotating shaft 28 is fixedly sleeved with a plurality of pushing plates 29, and the pushing plates 29 are matched with the material frame 12, for driving the pushing plates 29 to rotate by the material frame 12 when the conveying belt 8 conveys the material frame 12 to one side.

[0040] In the working process, when the conveying belt 8 conveys the material frame 12 into the cooling box 11, the material frame 12 pushes the push plate 29 to rotate counterclockwise, the push plate 29 drives the rotating rod 30 to rotate through the rotating shaft 28, and the rotating rod 30 drives the L-shaped plate 27 and the closing plate 26 to move up through the cooperation of the sliding groove 31 and the pin shaft 32, thereby releasing the closing of the discharge port 25, facilitating the movement of the material frame 12 through the discharge port 25 to the liquid storage tank 33. Due to the multiple heat insulation plates II 24 and the closing plate 26 arranged in the cooling box 11, and the cooperation between the heat insulation plates II 24 and the closing plate 26, the heat in the heating box 10 can be blocked from spreading to the outside from the cooling box 11, avoiding the waste of heat energy, and also avoiding the heat from hindering the cooling of the aluminum alloy bolt by the liquid spraying pipe 34.

[0041] Referring to Figure 8 and Figure 9 , the cooling structure includes a liquid storage tank 33 fixed on the top of the cooling box 11, a liquid spraying pipe 34, a liquid guide pipe 35, a spray head, a collection box 39, a steam collection cover 36, a U-shaped pipe 37, and an air blower II 38. The liquid storage tank 33 is made of metal, such as stainless steel, and is used to store cooling liquid. Its capacity is determined according to the cooling requirement, generally between 0.5-2m³. The cooling box 11 is fixed with multiple liquid spraying pipes 34 below the liquid storage tank 33, and the material of the liquid spraying pipe 34 is corrosion-resistant metal. The top of the liquid spraying pipe 34 is fixed with multiple liquid guide pipes 35, and the top ends of the multiple liquid guide pipes 35 are fixed to extend into the liquid storage tank 33, which is used to inject the cooling liquid in the liquid storage tank 33 into the liquid spraying pipe 34. The bottom of the liquid spraying pipe 34 is provided with multiple spray heads, which are atomizing spray heads with a spray hole diameter of 0.5-2mm, used to spray the cooling liquid downward to cool the aluminum alloy bolt. The bottom of the cooling box 11 is fixedly connected with a collection box 39 below the liquid spraying pipe 34, which is made of metal or plastic and is used to collect the cooling liquid. Its capacity is determined according to the flow rate and collection time of the cooling liquid, generally between 0.2-1m³.

[0042] Referring to Figure 8 and Figure 9 , both sides of the liquid storage tank 33 are provided with steam collection covers 36, and the bottom ends of the two steam collection covers 36 are fixed to extend into the cooling box 11, which is used to collect the water vapor generated during the cooling process. The top of the two steam collection covers 36 is fixedly connected with the same U-shaped pipe 37. The top of the liquid storage tank 33 is fixed with an air blower II 38, which is selected to be an axial flow air blower with an air volume of 50-200m³ / h and an air pressure of 300-800Pa. The air inlet end of the air blower II 38 is connected with the U-shaped pipe 37 through an air inlet pipe, and the air outlet end of the air blower II 38 is connected with an external heat exchanger through an air outlet pipe, which is used to exchange heat with the heat energy in the water vapor.

[0043] In the working process, when the material frame 12 moves to the lower side of the liquid spraying pipe 34, the liquid spraying pipe 34 sprays the cooling liquid in the liquid storage tank 33 downward through the liquid guide pipe 35 to cool the aluminum alloy bolts in the material frame 12, and the collecting box 39 is used for collecting the cooling liquid. When the cooling liquid cools the aluminum alloy bolts, heat exchange occurs, the cooling liquid is heated to generate water vapor, then the induced draft fan II 38 is operated, and the steam collecting cover 36 and the U-shaped pipe 37 are driven by the negative pressure generated during the operation of the induced draft fan II 38 to discharge the water vapor to the outside for collection, so that the water vapor can be fully utilized by heat exchange in the heat exchanger in the later stage.

[0044] In another embodiment, referring to Figure 5 and Figures 12-14 The heating box 10 is penetrated by the pushing block 23 on both sides, and the ends of the two pushing blocks 23 close to each other are respectively in abutment with the corresponding heat conduction arc plate 20, which is used to control the state of the heat conduction arc plate 20 to be inclined, so that the heat conduction arc plate 20 guides the heat energy to one side of the material frame 12. The size of the pushing block 23 is determined according to the size of the heat conduction arc plate 20 and the pushing requirement, and the length is between 50-150mm and the width is between 20-50mm. The heating box 10 is slidably connected with the sliding block 41 on both sides, and the sliding block 41 is made of metal material. The end of the two sliding blocks 41 close to the cooling box 11 is rotatably connected with the connecting rod 40, and the connecting rod 40 is made of metal rod. The ends of the two connecting rods 40 are respectively rotatably connected with the two rotating rods 30 located on the leftmost side, which is used to pull the sliding block 41 to one side through the connecting rod 40 when the rotating rod 30 rotates.

[0045] Referring to Figure 13 and Figure 14 The two pushing blocks 23 are provided with the rectangular groove 42. The top inner wall and the bottom inner wall of the two rectangular grooves 42 are provided with the guide groove 43. The two sliding blocks 41 are fixedly penetrated by the pin rod 44, the pin rod 44 is a metal rod, and the two ends of the pin rod 44 are respectively slidably matched with the adjacent two guide grooves 43, which is used to drive the pin rod 44 to move through the sliding block 41, control the pushing of the pushing block 23 to the heat conduction arc plate 20, and control the inclination angle of the heat conduction arc plate 20.

[0046] In the working process, when the material frame 12 pushes the leftmost pushing plate 29 to rotate and drives the closed plate 26 to move upward to remove the closure of the discharge port 25, the corresponding rotating rod 30 pulls the sliding block 41 to the cooling box 11 through the connecting rod 40, and the sliding block 41 drives the pushing block 23 to move outward through the cooperation of the pin rod 44 and the guide groove 43, removes the pushing of the heat conduction arc plate 20, and the heat conduction arc plate 20 rotates under the gravity of the bearing ball 22. Therefore, with the reciprocating swing of the rotating rod 30, the pushing block 23 can intermittently push the heat conduction arc plate 20 to rotate, so that the heat conduction arc plate 20 can blow hot air at different angles to the material frame 12, and the aluminum alloy bolts in the material frame 12 can be fully heated.

[0047] Method for using continuous solid solution annealing furnace for producing aluminum alloy bolts, comprising the following steps: S1, placing aluminum alloy bolts to be solid solution annealed in the material frame 12, conveying the material frame 12 to the preheating box 9 through the conveying belt 8, and preheating the aluminum alloy bolts placed in the material frame 12 in the preheating box 9 through the heat entering the preheating box 9 through the opening on one side during the heating process of the aluminum alloy bolts in the heating box 10; S2, when the aluminum alloy bolts in the heating box 10 are solid solution annealed, the heating module 13 operates to heat the air inside the heating box 10, and the solid solution annealing operation is performed through the hot air inside the heating box 10, and then the induced draft fan I 17 operates to inject the hot air gathered on the top inner wall of the heating box 10 into the heat collection plate 15, and the hot air blown out of the air outlet hole 16 heats the aluminum alloy bolts in the material frame 12 from below, and in addition, the hot air blown out of the air outlet hole 16 heats the material frame 12 from the side under the guidance of the heat conduction arc plate 20, thereby being able to heat the aluminum alloy bolts inside the material frame 12 in different directions, so that the aluminum alloy bolts are uniformly heated; S3, when the conveying belt 8 conveys the material frame 12 to the cooling box 11, the material frame 12 pushes the push plate 29 to rotate counterclockwise, the push plate 29 drives the rotating rod 30 to rotate through the rotating shaft 28, the rotating rod 30 drives the L-shaped plate 27 and the closing plate 26 to move up through the cooperation of the sliding groove 31 and the pin shaft 32, thereby unblocking the discharge port 25, facilitating the movement of the material frame 12 to the liquid storage tank 33 through the discharge port 25, and after the material frame 12 passes through the heat insulation plate II 24, the closing plate 26 re-blocks the discharge port 25. Because multiple heat insulation plates II 24 and closing plates 26 are arranged in the cooling box 11, and the heat insulation plates II 24 and the closing plates 26 cooperate with each other, the heat in the heating box 10 can be blocked from spreading to the outside of the cooling box 11, thereby avoiding waste of heat energy and preventing the heat from hindering the cooling of the aluminum alloy bolts by the liquid spraying pipe 34; S4, when the material frame 12 moves to below the liquid spraying pipe 34, the liquid spraying pipe 34 sprays the cooling liquid in the liquid storage tank 33 downward through the liquid guide pipe 35 to cool the aluminum alloy bolts in the material frame 12, and the collection box 39 is used to collect the cooling liquid. When the cooling liquid cools the aluminum alloy bolts, heat exchange occurs, and the cooling liquid produces water vapor when heated. Then the induced draft fan II 38 operates, and the steam collecting cover 36 and the U-shaped pipe 37 are discharged to the outside under the negative pressure generated during the operation of the induced draft fan II 38 to collect the water vapor, thereby facilitating heat exchange through the heat exchanger in the later stage and fully utilizing the heat energy; S5, when the material frame 12 pushes the leftmost pushing plate 29 to rotate and drives the closing plate 26 to move upwards to release the closing of the discharge port 25, the corresponding rotating rod 30 pulls the sliding block 41 to the cooling box 11 direction through the connecting rod 40, the sliding block 41 is driven through the cooperation of the pin rod 44 and the guide groove 43, and drives the pushing block 23 to move outward, releases the pushing of the heat conduction arc plate 20, and the heat conduction arc plate 20 rotates under the gravity of the bearing ball 22, so that the pushing block 23 can intermittently push the heat conduction arc plate 20 to rotate, so that the heat conduction arc plate 20 can blow hot air at different angles to the material frame 12, and the aluminum alloy bolt in the material frame 12 can be heated sufficiently.

[0048] However, as known to those skilled in the art, the working principle and wiring method of the induced draft fan I 17, the induced draft fan II 38 and the heating module 13 are all conventional means or common knowledge, and will not be described here. Those skilled in the art can make any selection or arrangement according to their needs or convenience.

[0049] The drawings in the specification of the present application are only of a schematic nature, and the size and shape of each component shown are not actual limits, but only a schematic representation. In the actual implementation process, each component can be reasonably configured and adjusted according to specific needs and actual conditions.

[0050] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacement or change according to the technical solution and inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. An aluminum alloy bolt, characterized by, The bolt head (1) is integrally formed with a rod portion (2) at the bottom, the outer wall of the rod portion (2) is provided with a thread (6), the bottom end of the rod portion (2) is provided with an annular taper (7), and the top of the bolt head (1) is provided with a hexagonal groove (3).

2. The aluminum alloy bolt of claim 1, wherein, The bottom of the bolt head (1) is fixed with an annular guide rail (4) with the rod portion (2) as the center, and the outer wall of the annular guide rail (4) is slidably sleeved with a grommet (5).

3. A continuous solution annealing furnace for producing an aluminum alloy bolt for solution annealing the aluminum alloy bolt as claimed in claim 1, characterized by, Including conveying belt (8) and annealing furnace body, the conveying belt (8) penetrates the annealing furnace body, the annealing furnace body is composed of preheating box (9), heating box (10) and cooling box (11), and the preheating box (9), heating box (10) and cooling box (11) are arranged in order from left to right, and the heating box (10) and the preheating box (9), cooling box (11) are connected by opening; A plurality of material frames (12) for containing aluminum alloy bolts are placed on the conveying belt (8); A plurality of heating modules (13) are arranged on the opposite inner walls of the heating box (10), and a heat conduction structure is arranged in the heating box (10) for fully and uniformly heating the aluminum alloy bolts in the material frame (12); A plurality of heat insulation structures arranged in order from left to right are arranged in the cooling box (11) for blocking the heat in the heating box (10) from overflowing outward through the cooling box (11); A cooling structure is arranged on the side of the plurality of heat insulation structures away from the heating box (10) for cooling the aluminum alloy bolts in the material frame (12).

4. The continuous solution annealing furnace for producing aluminum alloy bolts according to claim 3, characterized by The heat conduction structure includes a heat collecting plate (15) and two heat conducting arc plates (20), further includes a plurality of air guides I (17) fixed on the two sides of the heating box (10) through a rack, the air inlet end of the plurality of air guides I (17) is connected with a heat recovery pipe (18), one end of the plurality of heat recovery pipes (18) extends into the heating box (10), and the communication position of the heat recovery pipe (18) and the heating box (10) is located above the heating module (13), and the air outlet end of the air guide I (17) is communicated with the heat collecting plate (15) through a pipeline, so as to guide the hot air gathered at the top of the heating box (10) into the heat collecting plate (15); A plurality of air outlet holes (16) are formed in the top of the heat collecting plate (15), and the heat collecting plate (15) penetrates the conveying belt (8), so as to blow out the hot air from the bottom to the top through the air outlet holes (16), and heat the aluminum alloy bolts in the material frame (12) from the bottom; A plurality of bases (19) are fixed on the opposite inner walls of the heating box (10), a connecting lug (21) is rotatably connected in the plurality of bases (19), and the plurality of connecting lugs (21) are fixedly connected with the corresponding heat conducting arc plates (20), so as to guide the hot air blown out of the air outlet holes (16) to the direction of the material frame (12) through the heat conducting arc plates (20); The heat insulation plate I (14) is fixed below the heat collecting plate (15) in the heating box (10).

5. The continuous solution annealing furnace for producing aluminum alloy bolts according to claim 4, characterized by The heat insulation structure includes a heat insulation plate II (24) fixed in the cooling box (11), and the conveying belt (8) penetrates the heat insulation plate II (24). The heat insulation structure further comprises a discharge port (25) arranged on the heat insulation plate II (24), and the conveying belt (8) penetrates the discharge port (25); A closing plate (26) is sealingly arranged in the cooling box (11) and is in sliding fit with one side of the heat insulation plate II (24) to close the discharge port (25); The top end of the closing plate (26) extends above the cooling box (11), and L-shaped plates (27) are fixed to the two sides of the closing plate (26), the L-shaped plates (27) are above the cooling box (11), and pin shafts (32) are fixed to the L-shaped plates (27); A rotating shaft (28) penetrates the cooling box (11) and is located at the side of the heat insulation plate II (24) close to the heating box (10), a plurality of push plates (29) are fixedly sleeved on the outer wall of the rotating shaft (28), and the push plates (29) are matched with the material frame (12), when the conveying belt (8) moves with the material frame (12), the material frame (12) can push the push plates (29) to rotate; The two ends of the rotating shaft (28) extend out of the cooling box (11) and are fixed with rotating rods (30), and sliding grooves (31) are formed in the rotating rods (30).

6. The continuous solution annealing furnace for producing aluminum alloy bolts according to claim 5, characterized by The cooling structure comprises a liquid storage tank (33) fixed to the top of the cooling box (11), a plurality of liquid spraying pipes (34) are fixed in the cooling box (11) and below the liquid storage tank (33), the top of each liquid spraying pipe (34) is connected with a plurality of liquid guide pipes (35), and the top end of each liquid guide pipe (35) extends into the liquid storage tank (33) to guide the cooling liquid in the liquid storage tank (33) into the liquid spraying pipe (34); The bottom of the liquid spraying pipe (34) is provided with a plurality of nozzles for spraying the cooling liquid downward to cool the aluminum alloy bolt; A collection box (39) is fixed to the bottom of the cooling box (11) and below the liquid spraying pipe (34) to collect the used cooling liquid; Two steam collecting covers (36) are arranged on the two sides of the liquid storage tank (33), the bottom end of each steam collecting cover (36) extends into the cooling box (11) to collect the water vapor generated during the cooling process; A U-shaped pipe (37) is in communication with the top of each steam collecting cover (36); An air blower II (38) is fixed to the top of the liquid storage tank (33), and the air inlet end of the air blower II (38) is in communication with the U-shaped pipe (37) through an air inlet pipe.

7. The continuous solution annealing furnace for producing aluminum alloy bolts according to claim 6, characterized by The two sides of the heating box (10) are penetrated by push blocks (23), and the ends of the two push blocks (23) close to each other are in slidable contact with the corresponding heat-conducting arc plates (20) to adjust the inclination angle of the heat-conducting arc plates (20) so that the heat-conducting arc plates (20) can guide the hot air to the material frame (12); The top end of the heat-conducting arc plate (20) is fixed with a plurality of bearing balls (22).

8. The continuous solution annealing furnace for producing aluminum alloy bolts according to claim 7, characterized by, The heat insulation plate II (24) and the closing plate (26) are both made of ceramic fiber plates.

9. The continuous solution annealing furnace for producing aluminum alloy bolts according to claim 8, characterized by, The two sides of the heating box (10) are slidingly connected with sliding blocks (41), and the ends of the two sliding blocks (41) close to the cooling box (11) are rotatably connected with the two rotating rods (30) located at the leftmost side through connecting rods (40). Rectangular grooves (42) are formed in the two push blocks (23), and the top inner wall and the bottom inner wall of each rectangular groove (42) is provided with a guide groove (43); Pin rods (44) are fixed to the two sliding blocks (41), and the two ends of each pin rod (44) are slidably arranged in the adjacent guide grooves (43).

10. A method of using a continuous solution annealing furnace for producing aluminum alloy bolts, applied to the continuous solution annealing furnace for producing aluminum alloy bolts according to claim 9, characterized in that, The method comprises the following steps: S1, feeding and preheating: the aluminum alloy bolts to be solution annealed are placed in the material frame (12), and the material frame (12) is conveyed to the preheating box (9) through the conveying belt (8); the hot air in the preheating box (9) is diffused through the heat exchange opening between the heating box (10) and the preheating box (9), and the aluminum alloy bolts to be treated are preheated; S2, heating and circulating solution: the material frame (12) is conveyed into the heating box (10), and the air in the heating box (10) is heated by the heating module (13) to maintain the solution annealing temperature; the induced draft fan I (17) is started, the hot air gathered at the top of the heating box (10) is sucked and blown from bottom to top to the material frame (12) through the air outlet holes (16) of the heat collecting plate (15); at the same time, part of the hot air is guided to the side of the material frame (12) by the heat conducting arc plate (20), realizing multi-angle heating; S3, material passing and sealing linkage: when the conveying belt (8) conveys the material frame (12) from the heating box (10) to the cooling box (11), the material frame (12) abuts and pushes the push plate (29) to rotate; the push plate (29) drives the rotating shaft (28) and the rotating rod (30) to rotate, and the sliding groove (31) on the rotating rod (30) and the pin shaft (32) are slidably matched to drive the L-shaped plate (27) and the sealing plate (26) to move upwards, open the discharge port (25) for the material frame (12) to pass through; when the material frame (12) completely passes through the heat insulation plate II (24), the sealing plate (26) is reset to move downward to reseal the discharge port (25); S4, cooling and heat recovery: when the material frame (12) moves below the liquid spraying pipe (34), the cooling liquid in the liquid storage tank (33) is atomized and sprayed out through the liquid spraying pipe (34) to quench the aluminum alloy bolts; the negative pressure generated by the induced draft fan II (38) is used to extract the steam generated in the cooling process through the steam collecting cover (36) and the U-shaped pipe (37), and the steam is sent to an external heat exchanger for heat recovery; S5, heat adjustment: while the sealing plate (26) is opened and closed in step S3, the rotating rod (30) pulls or pushes the sliding block (41) to move through the connecting rod (40); the sliding block (41) drives the push block (23) to reciprocate in the direction perpendicular to the conveying direction by matching the pin rod (44) with the inclined guide groove (43); the movement of the push block (23) changes the abutting position of the push block (23) on the heat conducting arc plate (20), and the heat conducting arc plate (20) is swung by the gravity reset action of the heat conducting arc plate (20) itself, so that the angle of the hot air blowing to the material frame (12) is intermittently changed.

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