Drying equipment for aluminum alloy fasteners
Through the self-drive carding structure, the heat transfer uneven and physical damage problems in the drying process of aluminum alloy fasteners are solved, efficient and low-cost production optimization is achieved, and product quality and production efficiency are improved.
Patent Information
- Application Number
- CN202511049835.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-29
- Publication Date
- 2025-09-02
AI Technical Summary
In the prior art, aluminum alloy fasteners are not uniform in heat transfer, physical damage and low production efficiency due to random stacking during drying, which affect product quality and production costs.
The self-driven carding structure is adopted, and the mechanical linkage design is combined with flexible materials to achieve dynamic dispersion and uniform arrangement of fasteners. The carding frame and flexible strips are used to avoid uneven heat transfer and physical damage, and improve production efficiency.
It significantly improves heat transfer efficiency, protects the surface integrity of fasteners, reduces energy consumption and production costs, improves product quality and production economy, and provides a feasible solution for the intelligent upgrade of the fastener industry.
Smart Images
Figure CN120576567A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of drying equipment, and in particular to drying equipment for aluminum alloy fasteners. Background Art
[0002] In the prior art, when aluminum alloy fasteners are passivated and then dried, the fasteners are randomly placed, which can have adverse effects on heat transfer, physical structure, production efficiency and quality costs, and technology upgrades.
[0003] In terms of heat transfer, randomly stacked fasteners form a thermal barrier due to close contact, resulting in low internal clearances, preventing hot air from penetrating the core area of the stack. This creates a baking dead zone, where the core temperature falls far below the set point, resulting in insufficient removal of crystal water from the passivation film, which can lead to softening and failure in later use. This can also lead to overheating of the surface, causing localized temperatures in peripheral workpieces to exceed specified limits, leading to embrittlement and cracking of the passivation film and a significant decrease in salt spray corrosion resistance. For example, a bolt factory at an automotive company experienced widespread rusting of transmission nuts after installation due to stacked baking, resulting in a significant recall.
[0004] From a geometric perspective, the cylindrical shape and threaded features of fasteners can be irreversibly damaged by random collisions. Threads are prone to bite collapse, affecting the assembly torque coefficient. High point contact stresses between the workpieces create numerous indentations and scratches, damaging the integrity of the passive film. Collisions can also cause the passive film to flake off, causing a surge in corrosion current density. Summary of the Invention
[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides a drying device for aluminum alloy fasteners, which can effectively solve the problems of uneven heat transfer, physical damage and low production efficiency caused by traditional random stacking in the prior art.
[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: The present invention provides a drying device for aluminum alloy fasteners, comprising: body, A conveyor belt is provided inside the machine body, and includes a mesh belt, a flexible side plate is fixedly connected to the side of the mesh belt, a tooth plate is fixedly connected to the top of the flexible side plate, and the top of the tooth plate is meshed and connected with the bottom of the combing structure. The conveyor belt for carrying and transporting the passivated fasteners provides power to the combing structure while moving; Wherein, the combing structure includes a combing frame for combing randomly placed fasteners.
[0007] Furthermore, a protrusion is fixedly connected to the top of the mesh belt, and the top of the protrusion adopts an arc design.
[0008] Furthermore, the combing structure includes a gear rod meshingly connected to the top end of the tooth plate, the other end of the gear rod is rotatably connected to the inner wall of the machine body, and the outer wall of the gear rod is provided with a rotating belt.
[0009] Furthermore, the combing structure also includes a driving group, which includes a positioning rod that is transmission-connected to the top of the rotating belt. A median plate is provided in the middle of the positioning rod. The median plate consists of an inclined plate and an inclined rod, and the two ends of the inclined rod are respectively connected to the upper and lower ends of the inclined plate.
[0010] Furthermore, an adjusting plate is provided in the middle of the median plate, and a movable block is rotatably connected to the bottom end of the adjusting plate.
[0011] Furthermore, the combing structure also includes a movable group, which includes a fixed plate, with limiting rods passing through both ends of the fixed plate, a limiting groove is opened in the middle of the top of the fixed plate, and a connecting block is opened inside the limiting groove to be rotatably connected to the movable block.
[0012] Furthermore, flexible strips are equidistantly arranged at the bottom end of the combing frame.
[0013] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: The present invention is equipped with a self-driven combing structure, which realizes the dynamic dispersion and uniform arrangement of fasteners during the drying process, fundamentally solving the problems of uneven heat transfer, physical damage and low production efficiency caused by traditional random stacking. Its core advantage lies in the combination of mechanical linkage design and flexible material application, which significantly improves product quality and production economy without the need for additional energy consumption, and provides a feasible solution for the intelligent upgrade of the fastener industry. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.
[0015] Figure 1 Schematic diagram of the overall structure of a dryer according to an embodiment of the present invention.
[0016] Figure 2 Schematic diagram of the cross-sectional structure of a conveyor belt according to an embodiment of the present invention.
[0017] Figure 3 Schematic diagram of the internal cross-sectional structure of the machine body according to an embodiment of the present invention.
[0018] Figure 4Schematic diagram of the combing structure of an embodiment of the present invention.
[0019] Figure 5 Schematic diagram of the drive group structure of an embodiment of the present invention.
[0020] Figure 6 Schematic diagram of the activity group structure according to an embodiment of the present invention.
[0021] The numbers in the figure represent: 1. Machine body; 2. Conveyor belt; 21. Mesh belt; 22. Bump; 23. Flexible side plate; 24. Tooth plate; 3. Combing structure; 31. Gear rod; 32. Rotating belt; 33. Driving group; 331. Positioning rod; 332. Middle plate; 333. Adjusting plate; 334. Movable block; 34. Movable group; 341. Fixed plate; 342. Limiting rod; 343. Limiting groove; 344. Connecting block; 35. Combing frame. DETAILED DESCRIPTION
[0022] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying 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 making any creative efforts shall fall within the scope of protection of the present invention.
[0023] The present invention will be further described below with reference to the embodiments.
[0024] Example: See also Figures 1-6 The present invention provides a technical solution for drying equipment of aluminum alloy fasteners. In the existing technology, fasteners are randomly placed, which will have adverse effects on heat transfer, physical structure, production efficiency and quality cost, technology upgrades and other aspects.
[0025] In terms of heat transfer, randomly stacked fasteners form a thermal barrier due to close contact, resulting in low internal clearances, preventing hot air from penetrating the core area of the stack. This creates a baking dead zone, where the core temperature falls far below the set point, resulting in insufficient removal of crystal water from the passivation film, which can lead to softening and failure in later use. This can also lead to overheating of the surface, causing localized temperatures in peripheral workpieces to exceed specified limits, leading to embrittlement and cracking of the passivation film and a significant decrease in salt spray corrosion resistance. For example, a bolt factory at an automotive company experienced widespread rusting of transmission nuts after installation due to stacked baking, resulting in a significant recall.
[0026] From a geometric perspective, the cylindrical shape and threaded features of fasteners can be irreversibly damaged by random collisions. Threads are prone to bite collapse, affecting the assembly torque coefficient. High point contact stresses between the workpieces create numerous indentations and scratches, damaging the integrity of the passive film. Collisions can also cause the passive film to flake off, causing a surge in corrosion current density.
[0027] Random placement created numerous problems in terms of production efficiency and quality costs. Baking times were significantly extended, resulting in reduced production line throughput. To compensate for overheating, gas consumption increased, leading to overspending on energy costs per ton. Furthermore, rework and scrap rates remained high.
[0028] refer to Figure 2 and Figure 1 The drying equipment includes a body 1 and a conveyor belt 2. The conveyor belt 2 includes a mesh belt 21. The side of the mesh belt 21 is fixedly connected with a flexible side plate 23. The top of the mesh belt 21 is fixedly connected with a protrusion 22. The top of the protrusion 22 adopts an arc design.
[0029] refer to Figure 3 The top of the flexible side plate 23 is fixedly connected with a tooth plate 24, and the top of the tooth plate 24 is engaged with the bottom end of the combing structure 3. The conveyor belt 2 for carrying and transporting the passivated fasteners will provide power to the combing structure 3 while moving.
[0030] refer to Figure 5 、 Figure 6 and Figure 4 The cam 332 is provided with a plurality of guide wheels 331, 332 is provided with a plurality of guide wheels 332, 332 is provided with a plurality of guide wheels 333, 332 is provided with a plurality of guide wheels 334, and the plurality of guide wheels 334 are provided with a plurality of guide wheels 335.
[0031] The positioning rod 331 drives the combination of the median plate 332, the inclined plate + the inclined rod. The inclined plate decomposes the circular motion into a horizontal component force; the inclined rod transmits the vertical component force to the adjustment plate 333; the movable block 334 at the bottom of the adjustment plate 333 slides in the limit groove 343, converting the composite force into reciprocating motion along a specific trajectory.
[0032] The movable block 334 pushes the combing frame 35 through the connecting block 344; the flexible strip at the bottom of the combing frame 35 is made of polyurethane material with a hardness of Shore A80 and applies to the workpiece: horizontal shear force to destroy the stacking static friction; vertical micro-lifting force acceleration of 0.2~0.4g to promote the rearrangement of the workpiece.
[0033] When the device is activated, mesh belt 21, the main body of conveyor belt 2, is driven in a circular motion by a drive device such as a motor, carrying and transporting passivated fasteners. Passivated fasteners, such as standoffs, are randomly placed on mesh belt 21. Circular bumps 22 on the surface of mesh belt 21 increase the coefficient of friction and prevent the workpieces from slipping. Flexible side plates 23 move synchronously with mesh belt 21, driving toothed plates 24 fixed to their tops. Toothed plates 24 mesh with gear rods 31, converting the linear motion of mesh belt 21 into circular motion of gear rods 31.
[0034] The gear rod 31, via a rotating belt 32 mounted on its outer wall, drives the positioning rod 331 of the drive assembly 33 to rotate synchronously. The linkage between the center plate 332 and the adjustment plate 333 causes the center plate 332 in the middle of the positioning rod 331 to rotate with the shaft. The inclined plate and inclined rod structure within the center plate 333 forces the adjustment plate 333 to perform periodic tilting motion, driving the movable block 334 at its bottom to slide back and forth within the limiting slot 343.
[0035] The sliding of the movable block 334 pushes the fixed plate 341 to perform linear reciprocating motion along the limiting rod 342 through the connecting block 344, so that the combing frame 35 performs regular swinging above the fastener.
[0036] Finally, the fastener combing and dispersion step begins. The flexible strip at the bottom of the combing frame 35 contacts the fasteners during the swinging process, and through physical force, the stacked and entangled fasteners are dispersed into a single layer or sparse arrangement. At the same time, the elasticity of the flexible strip is used to avoid damaging the workpiece surface. The combing structure 3 directly uses the movement of the conveyor belt 2 as power, and realizes linkage through the meshing of the tooth plate 24 and the gear rod 31, which reduces the complexity and energy consumption of the equipment, conforms to the trend of energy conservation and emission reduction, and has a self-driven design without the need for an additional power source; When the speed of the mesh belt 21 changes, the swing frequency of the carding frame 35 is automatically adjusted synchronously to ensure effective carding under different production rhythms and guarantee stability under different production capacities.
[0037] The arc-shaped protrusion 22 reduces the contact stress between the fastener and the mesh belt 21, and the smooth transition structure avoids the sharp contact between the traditional flat mesh belt 21 and the fastener; The material of the flexible strip, such as rubber or nylon, can be adjusted according to the material and shape of the fastener to avoid thread damage or surface indentation caused by rigid collision.
[0038] The combing structure 3 is integrated above the conveyor belt and achieves force transmission through the rotating belt 32 and the linkage rod system. It does not require additional space inside the dryer and is suitable for production line upgrades. When the flexible strips of the combing frame 35 apply lateral force, the fasteners on the surface of the arc protrusion 22 are more likely to roll rather than slide, allowing entangled threads to be quickly separated. The arc design reduces the contact area between the workpiece and the mesh belt 21. Combined with the vibration combing of the flexible strip, the probability of adhesion between the passivation film and the mesh belt 21 is reduced, avoiding film peeling and rework costs caused by adhesion.
[0039] The reduction in contact stress not only protects the workpiece, but also reduces wear on the surface of the mesh belt 21, extending its service life and reducing maintenance costs. At the same time, the arc transition of the bump 22 reduces the risk of material jamming and reduces equipment failure rate.
[0040] The even distribution of the bumps 22 forms microchannels on the surface of the mesh belt 21, which increases the hot air flow area and makes the air flow distribution more even.
[0041] This dryer utilizes three innovative features: self-driven mechanical energy transmission, three-dimensional compound motion, and elastic contact protection. These innovations address uneven baking, high damage rates, and excessive energy consumption caused by random stacking. Compared to traditional retrofit solutions, such as the addition of an external swing table, its zero-energy consumption reduces investment payback periods and further advances fastener manufacturing towards green, intelligent manufacturing with "zero defects, zero damage, and zero excess baking."
[0042] The dryer designed in the present invention has achieved breakthrough optimization in heat transfer efficiency, physical damage control, production cost and technology upgrade through an innovative mechanical linkage structure. Its core advantages and quantitative benefits are as follows: the fasteners are dispersed into a single layer or sparsely arranged through the combing rack 35, so that the hot air can penetrate the material layer, the deviation between the core temperature and the set value is reduced, and the removal rate of the crystallization water of the passivation film is improved, thereby eliminating the baking dead zone.
[0043] After the workpieces are evenly distributed, the surface temperature difference is controlled within ±10℃, eliminating local overheating, improving salt spray corrosion resistance, and avoiding over-baking of the surface.
[0044] After the fasteners are dispersed, the probability of thread engagement is reduced, the fluctuation range of the assembly torque coefficient is narrowed, and the risk of thread bite is reduced.
[0045] Flexible strip combing replaces random collisions, effectively reducing the number of difficult-to-repair indentations on the workpiece surface, significantly improving the integrity of the passivation film, reducing corrosion current density, and reducing surface defects.
[0046] With the improvement of heat transfer efficiency, the baking time of a single batch is shortened, the production line throughput is increased, the baking time is shortened, the energy consumption is reduced, and the quality loss is reduced.
[0047] In traditional random stacking processes, workpieces are tightly stacked, with a gap ratio of less than 15%. This creates significant resistance to hot air penetration, leading to uneven baking and low efficiency. This solution utilizes a self-driven oscillating combing mechanism to increase the gap ratio of standoffs and accelerate hot air penetration.
[0048] This dryer utilizes an innovative self-driven combing mechanism to dynamically disperse and evenly arrange fasteners during the drying process, fundamentally resolving the issues of uneven heat transfer, physical damage, and low production efficiency associated with traditional random stacking. Its core advantage lies in its integration of mechanical linkage design and flexible material applications. This significantly improves product quality and production economics without requiring additional energy consumption, providing a viable solution for intelligent upgrades in the fastener industry.
[0049] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the various embodiments of the present invention.
Claims
1. A drying device for aluminum alloy fasteners, characterized in that: include: Body (1), A conveyor belt (2), the conveyor belt (2) being arranged inside the machine body (1), the conveyor belt (2) comprising a mesh belt (21), the side of the mesh belt (21) being fixedly connected to a flexible side plate (23), the top of the flexible side plate (23) being fixedly connected to a tooth plate (24), the top of the tooth plate (24) being meshedly connected to the bottom of the combing structure (3), and the conveyor belt (2) for carrying and transporting the passivated fasteners provides power to the combing structure (3) while moving; Wherein, the combing structure (3) comprises a combing frame (35) for combing randomly placed fasteners.
2. The drying equipment for aluminum alloy fasteners according to claim 1, characterized in that: A protrusion (22) is fixedly connected to the top of the mesh belt (21), and the top of the protrusion (22) adopts an arc design.
3. The drying equipment for aluminum alloy fasteners according to claim 1, characterized in that: The combing structure (3) comprises a gear rod (31) meshingly connected to the top end of the tooth plate (24); the other end of the gear rod (31) is rotatably connected to the inner wall of the machine body (1); and a rotating belt (32) is sleeved on the outer wall of the gear rod (31).
4. The drying equipment for aluminum alloy fasteners according to claim 3, characterized in that: The combing structure (3) further comprises a driving group (33), wherein the driving group (33) comprises a positioning rod (331) which is transmission-connected to the top end of the rotating belt (32), and a middle plate (332) is provided in the middle of the positioning rod (331). The middle plate (332) comprises an inclined plate and an inclined rod, and the two ends of the inclined rod are respectively connected to the upper and lower ends of the inclined plate.
5. The drying equipment for aluminum alloy fasteners according to claim 4, characterized in that: An adjusting plate (333) is provided in the middle of the middle plate (332), and a movable block (334) is rotatably connected to the bottom end of the adjusting plate (333).
6. The drying equipment for aluminum alloy fasteners according to claim 5, characterized in that: The combing structure (3) further comprises a movable group (34), the movable group (34) comprising a fixed plate (341), limiting rods (342) passing through the interior of both ends of the fixed plate (341), a limiting groove (343) being provided in the middle of the top end of the fixed plate (341), and a connecting block (344) being provided in the interior of the limiting groove (343) and being rotatably connected to the movable block (334).
7. The drying equipment for aluminum alloy fasteners according to claim 1, characterized in that: Flexible strips are equidistantly arranged at the bottom end of the combing frame (35).