Fastener heat treating apparatus and method

Abstract

The application belongs to the technical field of heat treatment equipment, and particularly relates to a fastener heat treatment equipment and method; the application comprises a rack, a furnace body and a conveying mechanism; the furnace body comprises multiple heating furnaces and holding furnaces; the conveying mechanism comprises upper and lower conveying mesh belts with opposite conveying directions, wherein the discharge end of the upper conveying mesh belt and the feeding end of the lower conveying mesh belt are located at the same end of the furnace body, and one side of the lower conveying mesh belt is provided with a feeding port; a lifting mechanism is installed on the rack and used for transferring the fasteners on the lower conveying mesh belt to the upper conveying mesh belt, and the lifting mechanism is arranged at one end of the furnace body; the lifting mechanism comprises a lifting frame, a transmission chain, multiple hoppers installed on the transmission chain and a driving motor used for driving the transmission chain to rotate; the application is provided with double-layer conveying mesh belts, the heating furnaces can simultaneously preheat and heat the fasteners, the length of the equipment is reduced, and the cost of the equipment is reduced.

Description

Technical Field

[0001] This invention relates to the field of heat treatment equipment technology, and in particular to a fastener heat treatment equipment and method. Background Technology

[0002] Automotive fasteners are a type of automotive mechanical parts used for fastening connections and have extremely wide applications. Heat treatment is a process that changes the internal structure of steel in the solid state through heating and cooling, thereby obtaining the desired properties. It is an important process in the manufacturing of machine parts and tools, and it is of great significance for realizing the potential of metal materials, improving the performance of parts, improving product quality, and extending service life.

[0003] Currently, most fasteners are piled up on a conveyor belt, which then transports them to a heat treatment furnace. Mesh belt furnaces typically have multiple heating zones to preheat the fasteners at low temperatures and heat them at high temperatures. This results in a long overall mesh belt furnace that occupies a large space. Furthermore, the uneven heating of different parts of the fasteners, caused by their piled up on the conveyor belt, leads to a decrease in the strength of the fasteners. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a fastener heat treatment device and method. By incorporating a double-layer conveyor belt, the fasteners are simultaneously preheated and heated, reducing the length of the device and aiming to solve the problems in the background technology.

[0005] To achieve the above-mentioned technical objectives, the specific technical solution of the present invention is as follows: The present invention proposes a fastener heat treatment equipment, comprising: a frame, a furnace body, and a conveying mechanism; the furnace body includes multiple heating furnaces and holding furnaces; the conveying mechanism includes an upper conveyor belt and a lower conveyor belt with opposite conveying directions, wherein the discharge end of the upper conveyor belt and the feed end of the lower conveyor belt are located at the same end of the furnace body, and a feed inlet is provided on one side of the lower conveyor belt; a lifting mechanism is installed on the frame for transferring fasteners on the lower conveyor belt to the upper conveyor belt, the lifting mechanism is located at one end of the furnace body, and a heat insulation cover is provided around the lifting mechanism; the lifting mechanism includes a lifting frame, a transmission chain, multiple hoppers installed on the transmission chain, and a drive motor for driving the transmission chain to rotate.

[0006] As a preferred embodiment of the present invention, a pair of connecting seats are rotatably connected to both ends of the hopper, the connecting seats are fixedly connected to the transmission chain, and a rotating shaft is rotatably connected between the two connecting seats. When the rotating shaft rotates, it drives the hopper to rotate. A gear is fixedly connected to one end of the rotating shaft, and a rack that cooperates with the gear is fixedly installed on the lifting frame.

[0007] As a preferred embodiment of the present invention, the hopper is slidably connected to the rotating shaft, the surface of the rotating shaft is provided with a protrusion, a sliding sleeve that is slidably connected to the protrusion is fixedly connected to the hopper, and a vibration spring is connected between the hopper and the two connecting seats, and the vibration spring is sleeved on the rotating shaft.

[0008] As a preferred embodiment of the present invention, a connecting member is fixedly connected to the lifting frame, and a vertically arranged inclined rail is fixedly connected to the connecting member. The distance between the inclined rail and the hopper gradually decreases from bottom to top, and the surface of the inclined rail is provided with a track groove. A rod is fixedly connected to the hopper, and a roller that cooperates with the track groove is connected to one end of the rod.

[0009] As a preferred embodiment of the present invention, a bracket is fixedly connected to the connecting seat, a tension spring is fixedly connected between the bracket and the hopper, and a stop bar for limiting the movement of the hopper is fixedly connected to the connecting seat.

[0010] As a preferred embodiment of the present invention, a pair of rotating rollers are rotatably connected to the lifting frame, and a sprocket that is connected to the rotating rollers in cooperation with the transmission chain is fixedly connected to the rotating rollers. The drive motor shaft is connected to one of the rotating rollers.

[0011] As a preferred embodiment of the present invention, a material blocking mechanism is installed at one end of the furnace body near the lifting mechanism; the material blocking mechanism includes a fixed plate and a baffle, a slide rail is provided on the fixed plate, a lifting seat is slidably connected on the slide rail, and the lifting seat is fixedly connected to the baffle through a fixed rod.

[0012] As a preferred embodiment of the present invention, a screw is threadedly connected to the fixing plate, and one end of the screw is rotatably connected to the lifting seat; the baffle has a V-shaped structure.

[0013] As a preferred embodiment of the present invention, a heating box is installed on the top of the heating furnace, and multiple heat radiation tubes are installed inside the heating box.

[0014] A heat treatment method for automotive fasteners includes the following steps:

[0015] Step 1: The automotive fasteners are transported to the lower conveyor belt through the feed inlet. The lower conveyor belt transports the automotive fasteners into the furnace. During the transport process, the heating furnace preheats the automotive fasteners on the lower conveyor belt at a low temperature.

[0016] Step 2: The automotive fasteners on the lower conveyor belt are conveyed to the lifting mechanism, which then transports them to the upper conveyor belt. The fasteners are then dispersed by the material blocking mechanism.

[0017] Step 3: As the upper conveyor belt carries the automotive fasteners through the furnace, the furnace heats the fasteners to a high temperature. After being kept warm in the heat preservation furnace, the upper conveyor belt transports the heated automotive fasteners to the next device for rapid cooling.

[0018] The beneficial effects of this invention are as follows:

[0019] 1. The present invention has an upper conveyor belt and a lower conveyor belt with opposite transport directions. The furnace body heats the fasteners on the upper conveyor belt at high temperature and preheats the fasteners on the lower conveyor belt at low temperature at the same time, so that the heating furnace can heat and preheat the fasteners at the same time, thereby shortening the overall length of the mesh belt furnace.

[0020] 2. The present invention has a lifting mechanism that can transport fasteners on the lower conveyor belt to the upper conveyor belt. The fasteners are evenly dropped onto the upper conveyor belt by the shaking of the hopper. The fasteners are further dispersed by the dispersing mechanism, which avoids the accumulation of fasteners and ensures that the fasteners are heated evenly. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a fastener heat treatment device proposed in this invention.

[0022] Figure 2 This is a cross-sectional schematic diagram provided for the present invention.

[0023] Figure 3 This is a schematic diagram of the lifting mechanism proposed in this invention.

[0024] Figure 4 This is a schematic diagram of the hopper structure proposed in this invention.

[0025] Figure 5 for Figure 4 A magnified view of a portion of point A in the middle.

[0026] Figure 6 This is a schematic diagram of the inclined rail structure proposed in this invention.

[0027] Figure 7 This is a schematic diagram of the material blocking mechanism proposed in this invention.

[0028] The corresponding names of the reference numerals in the figure are as follows: 1. Frame; 2. Furnace body; 201. Insulation furnace; 202. Heating furnace; 3. Conveying mechanism; 301. Upper conveyor belt; 302. Lower conveyor belt; 303. Feed inlet; 4. Heating box; 401. Heat radiation tube; 5. Lifting mechanism; 501. Lifting frame; 502. Hopper; 5020. Vibration spring; 5021. Rod; 5022. Roller; 5023. Gear; 5024. Support; 5025. Connecting seat; 5026. Tension spring; 5027. Rotating shaft; 5028. Raised bar; 5029. Sliding sleeve; 50210. Stop bar; 503. Inclined rail; 5031. Track groove; 5032. Connecting piece; 504. Rack; 505. Drive motor; 506. Transmission chain; 507. Sprocket; 508. Rotating roller; 6. Material blocking mechanism; 601. Fixed plate; 602. Lifting seat; 603. Screw; 604. Fixed rod; 605. Baffle; 606. Slide rail; 7. Insulation cover. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0030] Example: This example discloses a fastener heat treatment device, such as... Figures 1-7As shown, the system includes: a frame 1, a furnace body 2, and a conveying mechanism 3, with the conveying mechanism 3 passing through the furnace body 2. The furnace body 2 includes multiple heating furnaces 202 and a heat-holding furnace 201. A heating box 4 is installed on the top of each heating furnace 202, and multiple heat radiation tubes 401 are installed inside the heating box 4. The conveying mechanism 3 includes an upper conveyor belt 301 and a lower conveyor belt 302 with opposite conveying directions. The upper conveyor belt 301 and the lower conveyor belt 302 are made of high-temperature resistant metal mesh belts. Because the heat radiation tubes 401 are closer to the upper conveyor belt 301 and closer to the lower conveyor belt... Because the upper conveyor belt 301 is farther away, the heat radiation tube 401 heats the fasteners on the upper conveyor belt 301 at a higher temperature and the fasteners on the lower conveyor belt 302 at a lower temperature. The discharge end of the upper conveyor belt 301 and the feed end of the lower conveyor belt 302 are located at the same end of the furnace body 2, i.e., the end closest to the holding furnace 201. A feed inlet 303 is provided on one side of the lower conveyor belt 302. A lifting mechanism 5 is installed on the frame 1 to transfer the fasteners on the lower conveyor belt 302 to the upper conveyor belt 301. The lifting mechanism 5 is located within the furnace body. One end of body 2 and the periphery of the lifting mechanism 5 are equipped with a heat insulation cover 7. The automotive fasteners are conveyed from the feed inlet 303 to the lower conveyor belt 302. The lower conveyor belt 302 carries the automotive fasteners to the lifting mechanism 5. The lifting mechanism 5 transfers the automotive fasteners to the upper conveyor belt 301. Then, the upper conveyor belt 301 carries the automotive fasteners back. Throughout the process, the heating furnace 202 preheats the automotive fasteners on the lower conveyor belt 302, gradually raising the temperature of the fasteners from room temperature to 500-600℃ to remove surface moisture and oil. The heating furnace 202 rapidly heats the automotive fasteners on the upper conveyor belt 301 to 800-900°C for quenching, thus reducing thermal stress deformation and preventing sudden heating cracking of cold parts. Simultaneously, the furnace 202 rapidly heats the automotive fasteners on the upper conveyor belt 301 to 800-900°C for quenching. In this embodiment, by providing an upper conveyor belt 301 and a lower conveyor belt 302, the heating furnace 202 can simultaneously heat and preheat the fasteners on both belts, with the preheating and heating areas located within the same furnace 202. This shortens the overall length of the furnace body 2, saves equipment resources, and reduces costs.

[0031] like Figures 3-5As shown, the lifting mechanism 5 includes a lifting frame 501, a transmission chain 506, multiple hoppers 502 mounted on the transmission chain 506, and a drive motor 505 for driving the transmission chain 506 to rotate. The groove cross-section of the hoppers 502 is triangular. The drive motor 505 is mounted outside the insulation cover 7. The lifting frame 501 is fixedly mounted on the frame 1. The transmission chain 506 is made of high-temperature resistant metal. A pair of rotating rollers 508 are rotatably connected to the lifting frame 501. A sprocket 507 that cooperates with the transmission chain 506 is fixedly connected to the rotating rollers 508. The shaft of the drive motor 505 is connected to one of the rotating rollers 508. The 08 connection is achieved by driving the rotating roller 508 via the drive motor 505, which in turn drives the transmission chain 506 to rotate, thereby raising and lowering the hopper 502. A pair of connecting seats 5025 are rotatably connected to both ends of the hopper 502. The connecting seats 5025 are fixedly connected to the transmission chain 506. A rotating shaft 5027 is rotatably connected between the two connecting seats 5025. When the rotating shaft 5027 rotates, it drives the hopper 502 to rotate, and the hopper 502 can slide on the rotating shaft 5027. A gear 5023 is fixedly connected to one end of the rotating shaft 5027, and a gear that meshes with the gear 5023 is fixedly installed on the lifting frame 501. The rack 504 is positioned higher than the upper conveyor belt 301. In this embodiment, the upper conveyor belt 301, lower conveyor belt 302, and lifting mechanism 5 operate intermittently. Each movement of the lower conveyor belt 302 delivers the fasteners into the hopper 502. Then, the lower conveyor belt 302 stops, and the drive motor 505 drives the transmission chain 506, causing the hopper 502 to rise. When the hopper 502 rises to the same height as the upper conveyor belt 301, the gear 5023 meshes with the rack 504. As the hopper 502 continues to rise... At this time, rack 504 drives gear 5023 to rotate, gear 5023 drives hopper 502 to rotate, hopper 502 tilts downward, dumping fasteners onto upper conveyor belt 301, and then upper conveyor belt 301 starts to move, transporting the fasteners back; wherein, upper conveyor belt 301 and lower conveyor belt 302 move and stop simultaneously; when hopper 502 rises to a specified height, transmission chain 506 stops moving, at which point gear 5023 and rack 504 just separate, and the lower hopper 502 just moves to a position below lower conveyor belt 302 to receive the fasteners.

[0032] Preferably, a bracket 5024 is fixedly connected to the connecting seat 5025, and a tension spring 5026 is fixedly connected between the bracket 5024 and the hopper 502. A stop bar 50210 for limiting the hopper 502 is fixedly connected to the connecting seat 5025. When the stop bar 50210 contacts the hopper 502, the hopper 502 is in a horizontal state. When the gear 5023 separates from the rack 504, the hopper 502 returns to a horizontal state under the tension of the tension spring 5026.

[0033] like Figure 4-6 As shown, the surface of the rotating shaft 5027 is provided with a protrusion 5028, and a sliding sleeve 5029 that is slidably connected to the protrusion 5028 is fixedly connected to the hopper 502. This allows the rotating shaft 5027 to rotate, while the hopper 502 can also slide on the rotating shaft 5027. Furthermore, a vibration spring 5020 is connected between the hopper 502 and each of the two connecting seats 5025. The vibration spring 5020 is sleeved on the rotating shaft 5027, and its vibration spring 5020 improves the reciprocating vibration performance of the hopper 502. The lifting frame 501... A connector 5032 is fixedly connected, and a vertically arranged inclined rail 503 is fixedly connected to the connector 5032. The height of the inclined rail 503 is lower than the height of the rack 504. The distance between the inclined rail 503 and the hopper 502 gradually decreases from bottom to top, and the surface of the inclined rail 503 is provided with a track groove 5031. A rod 5021 is fixedly connected to the hopper 502, and one end of the rod 5021 is connected to a roller 5022 that cooperates with the track groove 5031. In specific implementation: when the hopper 502 receives the fasteners on the lower conveyor belt 302, the transmission chain 506 drives the hopper. As hopper 502 rises, roller 5022 contacts track groove 5031. With the rise of hopper 502, under the action of track groove 5031, hopper 502 slides to the right along rotation shaft 5027, compressing the right-side vibration spring 5020. The right-side vibration spring 5020 is compressed. At the instant roller 5022 separates from track groove 5031, hopper 502 slides to the left along rotation shaft 5027 under the elastic force of the right-side vibration spring 5020, compressing the left-side vibration spring 5020. The two vibration springs 502... Under the action of 0, the hopper 502 vibrates back and forth on the rotating shaft 5027, and the reciprocating vibration can reach 6-8 times. When the roller 5022 separates from the track groove 5031, the gear 5023 just meshes with the rack 504. As the hopper 502 rises, under the action of the rack 504, the hopper 502 tilts downward. During the tilting process, through the reciprocating vibration of the hopper 502, the fasteners in the hopper 502 are completely dropped onto the upper conveyor belt 301, so that the fasteners can fall evenly onto the upper conveyor belt 301.

[0034] like Figure 2 and Figure 7As shown, a baffle mechanism 6 is installed at one end of the furnace body 2 near the lifting mechanism 5 to prevent fasteners from accumulating on the upper conveyor belt 301. The baffle mechanism 6 includes a fixed plate 601 and a baffle 605. The fixed plate 601 is fixedly connected to the heating furnace 202. A vertical slide rail 606 is provided on the fixed plate 601. A lifting seat 602 is slidably connected to the slide rail 606. The lifting seat 602 is fixedly connected to the baffle 605 through a fixed rod 604. A screw 603 is threadedly connected to the fixed plate 601. One end of the screw 603 is rotatably connected to the lifting seat 602. The baffle 605 has a V-shaped structure. The height of the baffle 605 can be adjusted by rotating the screw 603, thereby adjusting the distance between the baffle 605 and the upper conveyor belt 301, preventing fasteners from accumulating on the upper conveyor belt 301. Furthermore, by setting the baffle 605 in a V-shaped structure, the fasteners in the middle can be dispersed to both sides, making the fasteners evenly distributed.

[0035] This embodiment also discloses a heat treatment method for automotive fasteners, based on the above-mentioned heat treatment equipment, including the following steps:

[0036] Step 1: The automotive fasteners are transported to the lower conveyor belt 302 through the feed inlet 303. The lower conveyor belt 302 transports the automotive fasteners into the furnace body 2. During the transport process, the heating furnace 202 preheats the automotive fasteners on the lower conveyor belt 302 at a low temperature, gradually raising the temperature of the fasteners from room temperature to 500-600℃.

[0037] Step 2: The automotive fasteners on the lower conveyor belt 302 are conveyed to the lifting mechanism 5. The lifting mechanism 5 transports the automotive fasteners on the lower conveyor belt 302 to the upper conveyor belt 301, and the material blocking mechanism 6 disperses the automotive fasteners, so that the automotive fasteners are heated evenly at high temperature.

[0038] Step 3: When the upper conveyor belt 301 carries the automotive fasteners through the furnace body 2, the heating furnace 202 heats the automotive fasteners to a high temperature, quickly heating them to 800-900℃. After being kept warm in the heat preservation furnace 201, the upper conveyor belt 301 transports the high-temperature heated automotive fasteners to the next equipment for rapid cooling.

[0039] Finally, it should be noted that in the description of this invention, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0040] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fastener heat treatment device, characterized in that, include: The frame (1), furnace body (2), and conveying mechanism (3) are also included. The furnace body (2) includes multiple heating furnaces (202) and heat preservation furnaces (201); The conveying mechanism (3) includes an upper conveying mesh belt (301) and a lower conveying mesh belt (302) with opposite conveying directions. The discharge end of the upper conveying mesh belt (301) and the feed end of the lower conveying mesh belt (302) are located at the same end of the furnace body (2). A feed inlet (303) is provided on one side of the lower conveying mesh belt (302). The frame (1) is equipped with a lifting mechanism (5) for transferring the fasteners on the lower conveyor belt (302) to the upper conveyor belt (301). The lifting mechanism (5) is located at one end of the furnace body (2), and the periphery of the lifting mechanism (5) is provided with a heat insulation cover (7). The lifting mechanism (5) includes a lifting frame (501), a transmission chain (506), multiple hoppers (502) mounted on the transmission chain (506), and a drive motor (505) for driving the transmission chain (506) to rotate; the hoppers (502) are slidably connected to the rotating shaft (5027), the surface of the rotating shaft (5027) is provided with a protrusion (5028), the hoppers (502) are fixedly connected with a sliding sleeve (5029) that is slidably connected to the protrusion (5028), and a vibration spring (5020) is connected between the hoppers (502) and the two connecting seats (5025), and the vibration spring (5020) is sleeved on the rotating shaft (5027); A connector (5032) is fixedly connected to the lifting frame (501), and a vertically arranged inclined rail (503) is fixedly connected to the connector (5032). The distance between the inclined rail (503) and the hopper (502) gradually decreases from bottom to top, and the surface of the inclined rail (503) is provided with a track groove (5031). A rod (5021) is fixedly connected to the hopper (502), and one end of the rod (5021) is connected to a roller (5022) that cooperates with the track groove (5031).

2. The fastener heat treatment equipment according to claim 1, characterized in that, The hopper (502) is rotatably connected to a pair of connecting seats (5025) at both ends. The connecting seats (5025) are fixedly connected to the transmission chain (506). A rotating shaft (5027) is rotatably connected between the two connecting seats (5025). When the rotating shaft (5027) rotates, it drives the hopper (502) to rotate. A gear (5023) is fixedly connected to one end of the rotating shaft (5027), and a rack (504) that meshes with the gear (5023) is fixedly installed on the lifting frame (501).

3. The fastener heat treatment equipment according to claim 2, characterized in that, A bracket (5024) is fixedly connected to the connecting seat (5025), a tension spring (5026) is fixedly connected between the bracket (5024) and the hopper (502), and a stop bar (50210) for limiting the hopper (502) is fixedly connected to the connecting seat (5025).

4. The fastener heat treatment equipment according to claim 3, characterized in that, A pair of rotating rollers (508) are rotatably connected to the lifting frame (501). A sprocket (507) that is connected to the rotating roller (508) and cooperates with the transmission chain (506) is fixedly connected to the rotating roller (508). The shaft of the drive motor (505) is connected to one of the rotating rollers (508).

5. The fastener heat treatment equipment according to claim 4, characterized in that, A baffle mechanism (6) is installed at one end of the furnace body (2) near the lifting mechanism (5); the baffle mechanism (6) includes a fixed plate (601) and a baffle (605). A slide rail (606) is provided on the fixed plate (601), and a lifting seat (602) is slidably connected on the slide rail (606). The lifting seat (602) is fixedly connected to the baffle (605) through a fixed rod (604).

6. The fastener heat treatment equipment according to claim 5, characterized in that, A screw (603) is threaded onto the fixed plate (601), and one end of the screw (603) is rotatably connected to the lifting seat (602); the baffle (605) has a V-shaped structure.

7. The fastener heat treatment equipment according to claim 6, characterized in that, The heating furnace (202) is equipped with a heating box (4) on top, and multiple heat radiation tubes (401) are installed inside the heating box (4).

8. A heat treatment method for automotive fasteners, utilizing the fastener heat treatment equipment as described in claim 7, characterized in that, Includes the following steps: Step 1: The automotive fasteners are transported to the lower conveyor belt (302) through the feed port (303). The lower conveyor belt (302) transports the automotive fasteners into the furnace body (2). During the transport process, the heating furnace (202) preheats the automotive fasteners on the lower conveyor belt (302) at low temperature. Step 2: The automotive fasteners on the lower conveyor belt (302) are conveyed to the lifting mechanism (5). The lifting mechanism (5) transports the automotive fasteners on the lower conveyor belt (302) to the upper conveyor belt (301), and the material blocking mechanism (6) disperses the automotive fasteners. Step 3: When the upper conveyor belt (301) carries the car fasteners through the furnace body (2), the heating furnace (202) heats the car fasteners at high temperature. After being kept warm in the heat preservation furnace (201), the upper conveyor belt (301) transports the car fasteners heated at high temperature to the next equipment for rapid cooling.

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