A bolt fastener heat treatment apparatus

Abstract

The utility model relates to bolt heat treatment equipment technical field, concretely relates to a bolt fastener heat treatment equipment of even heat receiving, including heat treatment furnace body, the heat treatment furnace body inside part is heat treatment cavity and cooling cavity, the bottom of heat treatment furnace body inside still be provided with the protection ring, the circulation subassembly has two groups and sets up in the both sides of heat treatment furnace body respectively, is used for making the hot air circulation flow in heat treatment cavity, the open and close subassembly sets up in the middle position of heat treatment furnace body, is used for separating heat treatment cavity and cooling cavity, the conversion subassembly sets up in the conversion subassembly and is used for transferring bolt from heat treatment cavity to cooling cavity, the conversion subassembly includes the carousel that rotates to set in the protection ring inside. The utility model discloses through being provided with heat treatment cavity and cooling cavity in heat treatment furnace body, and through the effect of conversion subassembly, heat treatment cavity is transferred to cooling cavity, to reduce the heat loss in heat treatment furnace.

Description

Technical Field

[0001] This utility model relates to the technical field of bolt heat treatment equipment, specifically a bolt fastener heat treatment equipment that can be uniformly heated. Background Technology

[0002] In the manufacturing process of bolts and fasteners, heat treatment is a crucial step in improving their mechanical properties (such as tensile strength, hardness, toughness, and fatigue resistance), directly determining the reliability and service life of the bolts in subsequent assembly and use. Currently, the industry commonly uses traditional single-chamber heat treatment furnaces for bolt heat treatment. The typical process is as follows: bolts to be treated are placed in batches into a single heat treatment chamber of the furnace, and the temperature inside the chamber is raised to a preset heat treatment temperature of 500-600℃ by the furnace heating system. After holding at this temperature for a period of time, the furnace is slowly cooled, and the heat treatment of the bolts is completed after cooling.

[0003] Because the heat treatment furnace is equipped with only one heat treatment chamber, after each batch of bolts has completed the heating-cooling process, the machine must be stopped, the furnace door opened, and the treated bolts removed before the next batch can be started. This operating mode results in forced interruptions in the heat treatment process, making continuous production impossible and severely restricting batch production efficiency, making it difficult to meet the needs of large-scale industrial production. Each time the furnace door is opened to remove or place bolts, a large amount of high-temperature heat accumulated inside the heat treatment furnace is rapidly dissipated, causing not only serious energy waste and a significant increase in production energy costs, but also drastic temperature fluctuations inside the furnace, which in turn affect the temperature stability of subsequent batches of bolts during heating, indirectly affecting the quality of heat treatment. Utility Model Content

[0004] The purpose of this utility model is to provide a heat treatment device for bolt fasteners that can be heated evenly. By setting a heat treatment chamber and a cooling chamber in the heat treatment furnace body, and by using a conversion component to transfer the heat treatment chamber to the cooling chamber, the heat loss in the heat treatment furnace is reduced.

[0005] To address the problems of existing technologies, this utility model provides a heat treatment device for bolt fasteners that can be uniformly heated, comprising a heat treatment furnace body, wherein the inner part of the heat treatment furnace body is divided into a heat treatment chamber and a cooling chamber, and a protective ring is also provided at the bottom of the inner part of the heat treatment furnace body; a circulation assembly, having two sets respectively arranged on both sides of the heat treatment furnace body, for circulating hot air in the heat treatment chamber; an opening and closing assembly, located in the middle of the heat treatment furnace body, for separating the heat treatment chamber and the cooling chamber; and a conversion assembly, located in the heat treatment furnace body, for transferring bolts from the heat treatment chamber to the cooling chamber; the conversion assembly includes a turntable rotatably arranged inside the protective ring, the top of the turntable having two sets of detachable shelves, and the two sets of shelves being respectively arranged in the heat treatment chamber and the cooling chamber, each set of shelves having several detachable storage plates, each storage plate having evenly arranged storage holes for bolt insertion.

[0006] Preferably, the conversion assembly further includes a separator disposed at the bottom of the heat treatment furnace body, the output end of which passes through the heat treatment furnace body and is connected to the turntable.

[0007] Preferably, the turntable has several limiting holes, and each shelf also has a plug at the bottom that matches the limiting holes.

[0008] Preferably, the inner wall of the shelf is provided with a plurality of guide plates, and the guide plates are slidably engaged with the shelf.

[0009] Preferably, the opening and closing assembly includes a partition plate vertically disposed inside the heat treatment furnace body, and a through groove is provided at the bottom of the partition plate. The partition plate is disposed at the junction of the heat treatment chamber and the cooling chamber. A movable door that can move up and down is also slidably disposed in the partition plate. The movable door also includes a telescopic drive component that is vertically fixed to the top of the heat treatment furnace body and is used to drive the movable door to move up and down.

[0010] Preferably, the circulation assembly further includes a plurality of heaters disposed on the inner wall of the heat treatment chamber for heating.

[0011] Preferably, the circulation assembly further includes two housings fixed on both sides of the heat treatment furnace body and an air intake installed on the top of the heat treatment chamber. A pipe is connected between the housing and the air intake. The circulation assembly also includes a rotary drive installed outside the housing, and the output end of the rotary drive passes through the housing and is connected to a fan blade.

[0012] Preferably, the inner walls of the heat treatment chamber and the cooling chamber are also provided with a heat insulation layer, and a heat insulation layer is also provided between the partition plate and the movable door.

[0013] The advantages of this utility model compared to the prior art are: The interior of the heat treatment furnace is divided into a functionally independent heat treatment chamber and a cooling chamber. A movable door, which can be opened and closed, is provided between the two chambers to control their connection and isolation. A turntable is rotatably mounted inside the furnace, its rotation path covering the corresponding bearing positions of the heat treatment and cooling chambers. A shelf is detachably placed in a preset positioning area on the turntable, ensuring that the shelf moves synchronously with the turntable. The shelf has a horizontally extending guide plate inside, through which the shelf slides. Operators can pull out the shelf by dragging it. The shelf has several arrayed placement holes, into which bolts to be treated can be inserted one by one. The limiting effect of the placement holes keeps the bolts upright and prevents them from contacting each other, ensuring uniform heating of the bolts during heat treatment. After the bolts in the heat treatment chamber complete the preset heating process at -℃, the movable door automatically opens, the turntable rotates to the preset angle, and the rack carrying the heated bolts is transferred from the heat treatment chamber to the cooling chamber. Then the movable door closes quickly, and the cooling chamber performs a slow cooling process on the bolts. After cooling, the bolts are taken out and reloaded. Then the reloaded bolts are transferred from the cooling chamber to the heat treatment chamber, realizing continuous production of bolt heat treatment. At the same time, the movable door is only opened briefly during the transfer phase, which effectively reduces the outward loss of high-temperature heat inside the heat treatment furnace, reduces energy consumption, maintains the temperature stability inside the furnace, and ensures the heat treatment quality of subsequent batches of bolts. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the external three-dimensional structure of a heat treatment device for bolt fasteners that can be uniformly heated, according to this utility model.

[0015] Figure 2 This is a schematic diagram of the internal structure of a heat treatment device for bolt fasteners that can be uniformly heated, according to this utility model.

[0016] Figure 3 This is a three-dimensional structural diagram of the conversion component of a heat treatment device for bolt fasteners that can be uniformly heated, according to this utility model.

[0017] Figure 4 This is an exploded structural diagram of a heat treatment device for bolt fasteners that can be uniformly heated, according to this utility model.

[0018] Figure 5 This is an exploded structural diagram of the conversion component of a heat treatment device for bolt fasteners that can be uniformly heated, according to this utility model.

[0019] The following are the labels in the diagram: 1. Heat treatment furnace body; 11. Protective ring; 2. Circulation component; 21. Shell; 22. Pipe; 23. Air intake; 24. Heater; 25. Rotary drive component; 26. Fan blade; 3. Opening and closing component; 31. Telescopic drive component; 32. Partition plate; 33. Movable door; 4. Conversion component; 41. Turntable; 411. Limiting hole; 42. Shelf; 421. Guide plate; 422. Insert rod; 43. Indexer; 44. Shelf plate; 441. Shelf hole. Detailed Implementation

[0020] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0021] Reference Figures 1-5As shown, this utility model provides a heat treatment device for bolt fasteners that can be uniformly heated, including a heat treatment furnace body 1. The heat treatment furnace body 1 is internally divided into a heat treatment chamber and a cooling chamber. The heat treatment furnace body 1 serves as the core support and working chamber of the equipment and is the basic carrier for the bolt heat treatment process. The internally divided "heat treatment chamber" and "cooling chamber" respectively undertake the heating process of the bolt (achieving a preset temperature of 500-600℃) and the cooling process (meeting the requirement of slow cooling). The functional partitioning avoids mutual interference between the heating and cooling processes. A protective ring 11 is also provided at the bottom of the interior of the heat treatment furnace body 1. A circulation component 2, consisting of two sets respectively arranged on both sides of the heat treatment furnace body 1, is used to circulate the hot air in the heat treatment chamber. The core function of the circulation component 2 is to drive the hot air in the heat treatment chamber to form a forced circulation flow. By breaking the temperature stratification phenomenon of natural heat convection in the heat treatment chamber, the heat field distribution in the chamber is made uniform, avoiding uneven heating of bolts due to local temperature differences. The opening and closing component 3 is set in the middle of the heat treatment furnace body 1 to separate the heat treatment chamber and the cooling chamber. When the opening and closing component 3 is in the closed state, it can effectively separate the temperature environment of the two chambers (maintaining a high temperature in the heat treatment chamber and a low temperature in the cooling chamber), avoiding heat loss caused by heat flow between the two chambers. It is only opened when the bolt needs to be transferred from the heat treatment chamber to the cooling chamber, which greatly shortens the connection time between the two chambers and reduces the total heat loss inside the heat treatment furnace body 1. A conversion assembly 4, disposed within the heat treatment furnace body, is used to transfer bolts from the heat treatment chamber to the cooling chamber. The conversion assembly 4 includes a turntable 41 rotatably disposed inside a protective ring 11. The top of the turntable 41 has two detachable shelves 42, which are respectively disposed in the heat treatment chamber and the cooling chamber. Each shelf 42 has several detachable plates 44, and each plate 44 has evenly distributed holes 441 for bolt insertion. The holes 441 allow bolts to be inserted one-to-one; the limiting effect of the holes 441 keeps the bolts upright and prevents them from contacting each other. This avoids heat shielding caused by bolt stacking and ensures that the bolt surface is evenly exposed to hot air, further improving heating uniformity and preventing surface damage caused by bolt collisions during cooling. The conversion assembly 4 also includes a separator 43 disposed at the bottom of the heat treatment furnace body 1. The output end of the separator 43 passes through the heat treatment furnace body 1 and connects to the turntable 41.

[0022] When the equipment is in operation, the operator first inserts the bolts to be treated one by one into the placement holes 441 of the placement plate 44 outside the furnace. Then, the placement plate 44 with bolts is assembled onto the placement rack 42. Subsequently, the two sets of placement racks 42 are installed on the turntable 41 at the corresponding positions of the heat treatment chamber and the cooling chamber, respectively, to complete the initial loading. After the equipment is started, the opening and closing component 3 remains closed, and the circulation component 2 starts and drives the hot air circulation in the heat treatment chamber to make the temperature inside the chamber rise steadily to 500-600℃, so as to uniformly heat the bolts on the placement rack 42 at the position of the heat treatment chamber. At this time, the placement rack 42 at the position of the cooling chamber (if it is the first operation, it has already loaded bolts; for subsequent operations, it carries the bolts that have been heated) is slowly cooled simultaneously. After the bolts in the heat treatment chamber have completed the preset heating time, the opening and closing assembly 3 automatically opens, and the indexing device 43 drives the turntable 41 to rotate a preset angle (usually 180°), transferring the heated shelf 42 in the heat treatment chamber to the cooling chamber. Simultaneously, the shelf 42 in the cooling chamber (already loaded with bolts to be treated) is transferred to the heat treatment chamber. Then, the opening and closing assembly 3 quickly closes, the heat treatment chamber begins heating the newly transferred bolts, and the cooling chamber slowly cools the newly transferred heated bolts. During this process, the operator can disassemble the cooled shelf 42 (or shelf 44) in the cooling chamber, remove the finished bolts, and reinstall the bolts to be treated, preparing for the next round of transfer. Through the "heating-transfer-cooling-loading" cycle, the equipment achieves continuous heat treatment of the bolts. Furthermore, because the opening and closing assembly 3 only opens briefly during transfer, heat loss is significantly reduced, and the cooperation between the circulation assembly 2 and the shelf hole 441 ensures uniform heating of the bolts.

[0023] refer to Figure 4 and Figure 5 As shown, the turntable 41 has several limiting holes 411, and each shelf 42 has a plug rod 422 at the bottom that cooperates with the limiting holes 411.

[0024] The turntable 41 has several circumferentially distributed limiting holes 411. The number, diameter and distribution spacing of the limiting holes 411 are designed to be compatible with the bottom insertion rod 422 of the shelf 42. The hole-shaft mating structure provides a precise installation reference for the shelf 42, and avoids the shelf 42 from being installed off the turntable 41.

[0025] The inner wall of the shelf 42 is provided with a plurality of guide plates 421, and the guide plates 421 are slidably engaged with the shelf 44.

[0026] Align the bolted shelf 44 with the groove of the guide plate 421 on the inner wall of the shelf 42, and push it smoothly into the shelf 42 along the groove until the shelf 44 is fully embedded in the preset position. The guide plate 421 limits the shelf 44 so that it does not tilt or shift, thus completing the assembly of a single shelf 44.

[0027] refer to Figure 1 , Figure 2 and Figure 3 As shown, the opening and closing assembly 3 includes a partition plate 32 vertically arranged inside the heat treatment furnace body 1, and a through groove is provided at the bottom of the partition plate 32. The partition plate 32 is located at the junction of the heat treatment chamber and the cooling chamber. A movable door 33 that can move up and down is also slidably arranged in the partition plate 32. The movable door 33 also includes a telescopic drive member 31 that is vertically fixed to the top of the heat treatment furnace body 1 and is used to drive the movable door 33 to move up and down.

[0028] The core function of the telescopic drive component 31 is to provide a stable lifting drive force for the movable door 33. By controlling the telescopic stroke and speed, it can ensure the timeliness and sealing of the opening and closing of the movable door 33, and avoid heat loss due to drive delay.

[0029] refer to Figure 4 As shown, the circulation assembly 2 also includes several heaters 24 disposed on the inner wall of the heat treatment chamber for heating. The circulation assembly 2 also includes two housings 21 fixed on both sides of the heat treatment furnace body 1 and an air intake 23 installed on the top of the heat treatment chamber. The inner wall of the housing 21 is also provided with a heat insulation layer. A pipe 22 is connected between the housing 21 and the air intake 23. Heat insulation material can be installed on the outside of the pipe 22. The circulation assembly 2 also includes a rotary drive 25 installed on the outside of the housing 21, and the output end of the rotary drive 25 passes through the housing 21 and is connected to a fan blade 26.

[0030] The heater 24 has several heaters that are evenly embedded in the inner wall of the heat treatment chamber. It adopts an electric heating tube or an electromagnetic heating module structure, and its heating power can be adjusted by the control system (not shown in the figure). Its core function is to provide a heat source for the heat treatment chamber, heat the circulating air to the preset heat treatment temperature of 500-600℃, and at the same time cooperate with the hot air circulation to make the heat field distribution in the chamber uniform and avoid insufficient heating of bolts due to local low temperature.

[0031] The rotating drive component 25 drives the fan blades 26 to rotate at high speed, creating a negative pressure inside the housing 21. Air is drawn from the heat treatment chamber through the air intake 23 at the top of the chamber. The air enters the housing 21 through the pipe 22 wrapped with heat-insulating protective material, and is then pushed into the heat treatment chamber by the fan blades 26. At the same time, the heater 24 is powered on and starts, adjusting the heating power according to the preset parameters of the control system to heat the circulating air to 500-600°C. Through continuous closed-loop circulation of hot air, the heat field inside the heat treatment chamber is evenly distributed, and the bolts on the work position shelf 42 of the heat treatment chamber are evenly heated. During this period, the heat insulation layer on the inner wall of the housing 21 and the heat insulation protective material on the outside of the pipe 22 effectively block heat loss and maintain a stable hot air temperature.

[0032] The inner walls of the heat treatment chamber and the cooling chamber are also provided with heat insulation layers, and a heat insulation layer is also provided between the partition plate 32 and the movable door 33. The inner walls of both the heat treatment chamber and the cooling chamber are fitted with high-temperature resistant heat insulation layers (such as ceramic fiber boards or aluminum silicate cotton layers). These insulation layers can effectively reduce heat loss from the chamber to the outside of the furnace, maintain the temperature stability of both chambers, reduce energy consumption, and prevent the furnace shell from overheating due to high temperatures, thus ensuring the safety of operators.

[0033] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A heat treatment device for bolt fasteners capable of uniform heating, characterized in that, include The heat treatment furnace body (1) is divided into a heat treatment chamber and a cooling chamber. A protective ring (11) is also provided at the bottom of the heat treatment furnace body (1). The circulation assembly (2) has two sets and is respectively arranged on both sides of the heat treatment furnace body (1) for circulating hot air in the heat treatment chamber; The opening and closing assembly (3) is located in the middle of the heat treatment furnace body (1) and is used to separate the heat treatment chamber and the cooling chamber; A conversion assembly (4) is disposed in the heat treatment furnace body (1) and is used to transfer the bolts from the heat treatment chamber to the cooling chamber; The conversion assembly (4) includes a turntable (41) rotatably disposed inside the protective ring (11). The top of the turntable (41) is provided with two sets of detachable shelves (42), and the two sets of shelves (42) are respectively disposed in the heat treatment chamber and the cooling chamber. Each set of shelves (42) is provided with several detachable shelves (44), and each shelf (44) is provided with shelves (441) for bolts to be inserted evenly.

2. The heat treatment equipment for bolt fasteners capable of uniform heating according to claim 1, characterized in that, The conversion component (4) also includes a separator (43) located at the bottom of the heat treatment furnace body (1), the output end of which passes through the heat treatment furnace body (1) and is connected to the turntable (41).

3. The heat treatment equipment for bolt fasteners capable of uniform heating according to claim 1, characterized in that, The turntable (41) has several limiting holes (411), and each shelf (42) has a plug (422) at the bottom that matches the limiting holes (411).

4. The heat treatment equipment for bolt fasteners capable of uniform heating according to claim 1, characterized in that, The inner wall of the shelf (42) is provided with several guide plates (421), and the guide plates (421) slide in cooperation with the shelf (44).

5. The heat treatment equipment for bolt fasteners capable of uniform heating according to claim 1, characterized in that, The opening and closing assembly (3) includes a partition plate (32) vertically arranged inside the heat treatment furnace body (1), and a through groove is provided at the bottom of the partition plate (32). The partition plate (32) is located at the junction of the heat treatment chamber and the cooling chamber. A movable door (33) that can move up and down is also slidably arranged in the partition plate (32). The movable door (33) also includes a telescopic drive component (31) that is vertically fixed to the top of the heat treatment furnace body (1) and used to drive the movable door (33) to move up and down.

6. The heat treatment equipment for bolt fasteners capable of uniform heating according to claim 1, characterized in that, The circulation assembly (2) also includes several heaters (24) disposed on the inner wall of the heat treatment chamber for heating.

7. The heat treatment equipment for bolt fasteners capable of uniform heating according to claim 6, characterized in that, The circulation assembly (2) also includes two housings (21) fixed on both sides of the heat treatment furnace body (1) and an air inlet (23) installed on the top of the heat treatment chamber. A pipe (22) is connected between the housing (21) and the air inlet (23). The circulation assembly (2) also includes a rotary drive (25) installed outside the housing (21), and the output end of the rotary drive (25) passes through the housing (21) and is connected to a fan blade (26).

8. The heat treatment equipment for bolt fasteners capable of uniform heating according to claim 5, characterized in that, The inner walls of the heat treatment chamber and the cooling chamber are also provided with a heat insulation layer, and a heat insulation layer is also provided between the partition plate (32) and the movable door (33).

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