A fastener heat treatment apparatus and method

Abstract

This invention discloses a fastener heat treatment apparatus and method, belonging to the field of fastener heat treatment technology. It includes a frame with a fastener conveying assembly embedded inside. The fastener conveying assembly includes a conveyor belt for conveying fasteners, and multiple fastener conveying grooves are formed on the conveying surface of the conveyor belt. In this invention, a driven gear drives a fastener turning roller to rotate within the fastener conveying grooves, thus causing the fasteners to turn. This ensures relatively uniform heating of all parts of the fasteners during heat treatment, guaranteeing the quality of the fasteners after heat treatment. Compared with existing technologies, this invention enables uniform heating during the heating process, improves the processing quality of the entire batch of fasteners, reduces heat energy waste, and prevents oxidation of fasteners during the heat treatment process. This lays the foundation for improving the performance of fasteners after heat treatment and can also reduce the consumption of inert gas to a certain extent, thus reducing the cost of fastener heat treatment.

Description

Technical Field

[0001] This invention belongs to the field of fastener heat treatment technology, and particularly relates to a fastener heat treatment apparatus and method. Background Technology

[0002] Fasteners are a general term for mechanical parts used to securely connect two or more parts or components into a whole. Various types of fasteners can be found on various machines, equipment, vehicles, ships, railways, bridges, buildings, structures, tools, instruments, chemical products, and meters. When these devices are in operation, the various tensile, compressive, shearing, torsional, bending, and impact loads generated by the moving parts are transmitted to the fasteners. Fasteners bear various loads. Currently, the service life of domestically produced fasteners is relatively short, and some fasteners operate in extremely harsh environments, requiring high performance. The quality of the heat treatment process directly affects the performance of the fasteners.

[0003] Existing technologies disclose several invention patents in the field of fastener heat treatment. Among them, patent application number CN202310945669.7 discloses a continuous heat treatment device for alloy steel fasteners, comprising: a base, serving as the bottom support for the continuous heat treatment device; a pair of conveyor belts mounted symmetrically on the top surface of the base, used to transport workpieces to be processed, with the two conveyor belts transporting in opposite directions; a housing fixed to the top surface of the base and covering the conveyor belts; multiple pairs of sleeves evenly fixed to the surface of the conveyor belts; a pallet for supporting the workpieces to be processed; and a mechanism for controlling the pallet via a rotating column, a connecting plate, and a gripping assembly. The transfer of the pallet to another conveyor belt completes a work cycle, thus avoiding the pallet from being fixed on the conveyor belt surface and getting caught in the bottom of the conveyor belt, which would damage the conveyor belt. At the same time, after the pallet is transferred to another conveyor belt, the heat treatment of nuts and other workpieces can continue, thereby improving work efficiency. However, this technical solution still has some shortcomings in its application. The fasteners are still in a relatively static state on the conveyor surface, and the heating effect on the part of the fasteners facing the conveyor surface is relatively poor, which will affect the finishing quality of the fasteners, resulting in inconsistent quality of fasteners in the same batch, and wasting heat energy. In addition, the fasteners are in a relatively exposed state during the heat treatment process and are easily oxidized by oxygen in the air.

[0004] Based on this, the present invention designs a fastener heat treatment apparatus and method to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to address the problems in the prior art where fasteners are still in a relatively static state on the conveying surface, resulting in relatively poor heating of the fastener-facing portion, which in turn affects the finishing quality of the fasteners, leading to inconsistent quality among fasteners in the same batch, wasting heat energy, and making the fasteners relatively exposed during heat treatment and easily oxidized by oxygen in the air. Therefore, this invention proposes a fastener heat treatment device and method.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A fastener heat treatment apparatus includes a frame, with a fastener conveying assembly embedded inside the frame. The fastener conveying assembly includes a conveyor belt for conveying fasteners, and multiple fastener conveying grooves are formed on the conveying surface of the conveyor belt. A fastener flipping assembly is embedded between the multiple fastener conveying grooves and the frame. The fastener flipping assembly includes multiple sets of fastener flipping rollers, which are rotatably connected to the multiple fastener conveying grooves to drive the fasteners to flip.

[0008] A heat treatment furnace body is connected to the corresponding conveyor belt on the frame. Multiple electric heaters are installed inside the heat treatment furnace body. A discharge port is opened at one end of the heat treatment furnace body along the conveyor belt transmission direction. Fastener smoothing components are embedded inside the heat treatment furnace body.

[0009] As a further description of the above technical solution:

[0010] The fastener conveying assembly also includes multiple conveyor rollers, all of which are rotatably connected to the port at the top of the frame. The multiple conveyor rollers are connected by a conveyor belt, and a motor is installed at the end of one of the conveyor rollers. The motor body is mounted on the frame.

[0011] As a further description of the above technical solution:

[0012] The fastener flipping assembly also includes multiple sets of rotating shafts, which are rotatably connected to multiple fastener conveying grooves, and multiple sets of fastener flipping rollers are fixedly sleeved on the multiple sets of rotating shafts.

[0013] The fastener turning roller is embedded in the fastener conveying groove, and the roller surface of the fastener turning roller is provided with multiple corrugated grooves arranged in a ring array.

[0014] A driven gear is fixedly sleeved on the rotating shaft. The driven gear is located on one side of the conveyor belt. The tooth surfaces of multiple driven gears are meshed with the same tooth surface drive belt, which is embedded in the inner side of the frame.

[0015] As a further description of the above technical solution:

[0016] The fastener smoothing assembly includes an adapter frame, which is embedded in the heat treatment furnace. The inner side of the adapter frame is provided with a fastener smoothing plate, and the end of the fastener smoothing plate is connected to a first adapter shaft. The fastener smoothing plate is rotatably connected to the adapter frame through the first adapter shaft. A first adapter spring is sleeved on the first adapter shaft, and the fastener smoothing plate is elastically connected to the adapter frame through the first adapter spring.

[0017] The adapter frame is connected to a support rod, and the other end of the support rod is connected to the inner top of the heat treatment furnace body.

[0018] As a further description of the above technical solution:

[0019] The heat treatment furnace body is embedded with a fastener feeding assembly, which is tangent to the conveyor belt and is used for sealing the heat treatment furnace body;

[0020] The fastener feeding assembly includes a feeding box, which is embedded in the heat treatment furnace. A side cover is provided on the side end face of the feeding box. The side cover is tangent to the conveyor belt. A connecting buckle is connected to the side end face of the feeding box corresponding to the side cover. A second connecting shaft is connected to the end face of the side cover. A winding groove is opened at the end of the second connecting shaft. The side cover is rotatably connected to the connecting buckle through the second connecting shaft. A second connecting spring is sleeved on the second connecting shaft. The side cover is elastically connected to the connecting buckle through the second connecting spring. A sloping panel is connected to the bottom of the inner side of the feeding box.

[0021] The bottom of the feeding box is connected to a compensation base, the bottom of the compensation base is provided with a telescopic groove, a telescopic shaft is sleeved in the telescopic groove, the end of the telescopic shaft is connected to a first support spring, the telescopic shaft is elastically supported and connected to the telescopic groove through the first support spring, the other end of the telescopic shaft is connected to a chassis, the bottom of the heat treatment furnace body is connected to a limit rod corresponding to the chassis, and a hydraulic cylinder is installed on the side of the compensation base.

[0022] As a further description of the above technical solution:

[0023] The heat treatment furnace body is equipped with a vacuuming component for extracting air from the feeding box. The vacuuming component includes a sealing cover, which is embedded in the heat treatment furnace body. A piston rod is connected to the sealing cover. A sleeve is engaged with the piston rod on the heat treatment furnace body. The other end of the piston rod passes through the sleeve and is connected to a piston plate. A piston cylinder is connected to the piston plate on the heat treatment furnace body. A piston spring is connected to the piston plate. The piston plate is elastically supported and connected to the top of the piston cylinder through the piston spring.

[0024] As a further description of the above technical solution:

[0025] An exhaust pipe is connected to the outer wall of the piston cylinder below the piston plate. A second one-way flow-blocking component is installed inside the exhaust pipe. A suction hole is opened at the bottom of the sealing box cover. The sealing box cover is connected to the inside of the piston rod through the suction hole. A first one-way flow-blocking component is embedded in the suction hole.

[0026] As a further description of the above technical solution:

[0027] The first and second unidirectional flow interception components have the same structure. The first unidirectional flow interception component includes a unidirectional flow interception tube, which is embedded in the suction hole. A funnel-shaped cover is snapped into the port of the unidirectional flow interception tube, and a sealing plug is sealed inside the funnel-shaped cover. A sliding rod is connected to the other end of the sealing plug, and a mesh panel is sleeved on the other end of the sliding rod. The mesh panel is snapped into the unidirectional flow interception tube, and a second support spring is sleeved on the sliding rod. The mesh panel is elastically supported and connected to the sealing plug through the second support spring.

[0028] A method for heat treatment of fasteners, comprising:

[0029] In the initial stage, the feeding box is located below the heat treatment furnace body, and the sealing box cover is located inside the lower port of the heat treatment furnace body. The sealing box cover is also tangent to the conveying surface of the conveyor belt. Therefore, the heat treatment furnace body is in a relatively sealed state. As the electric heater releases a large amount of heat energy during the power-on operation, the air pressure inside the heat treatment furnace body is greater than the external air pressure.

[0030] A feeding mechanism for fasteners is installed inside the frame. The feeding mechanism is controlled to transport and feed the fasteners to be heat-treated. When the fasteners are transported to the tail end, they fall freely into the feeding box. After the feeding box is full, the built-in control system of the fastener heat treatment device automatically controls the feeding mechanism to stop. Then, the built-in control system controls the hydraulic cylinder to extend, pushing the feeding box connected to the compensation base upward into the heat treatment furnace. When the feeding box and the side cover are connected to the sealing cover, the sealing cover seals the feeding box. The built-in control system controls the hydraulic cylinder to continue extending. At this time, the side cover replaces the sealing cover and connects to the conveyor belt. Therefore, the lower end of the heat treatment furnace is still in a relatively sealed state. In the subsequent process, the feeding box and the side cover will push the sealing cover upward. During the upward movement of the sealing cover, the piston rod pushes the piston plate to move upward in the piston cylinder.

[0031] The air pressure below the piston plate inside the piston cylinder gradually decreases. The first one-way intercepting internal sealing plug gradually moves away from the hopper-shaped hood. At the same time, the sealing plug pushes the sliding rod to slide inside the mesh panel and compresses the second support spring, causing it to elastically deform. The gradual movement of the sealing plug away from the hopper-shaped hood will release the sealing effect on the hopper-shaped hood. At this time, the inside of the one-way intercepting pipe is in a conductive state, so the air in the feeding box will be drawn into the piston cylinder. After the feeding box is completely inside the heat treatment furnace body, the compensating base replaces the feeding box and the side cover to seal the lower port of the heat treatment furnace body. The hydraulic cylinder continues to operate. During the extension movement, when the limiting rod connects with the protruding part of the chassis, the chassis cannot continue to move upward under the restriction of the limiting rod. The chassis extends within the telescopic groove via the telescopic rod, pulling the first support spring to cause elastic deformation. A rope is wound and connected between the protruding part of the chassis and the winding groove at the end of the second adapter shaft. Since the chassis cannot continue to move upward, it will exert tension on the rope. The rope wound and connected within the winding groove is gradually released, generating torque on the winding groove. Under the action of torque, the second adapter shaft drives the side cover to rotate, opening the side cover and twisting the second adapter spring to cause elastic deformation.

[0032] After the side box cover is opened, the fasteners to be heat-treated in the feeding box roll along the slope formed by the slope panel and the feeding box cover to the conveyor belt. The conveyor belt drives the fasteners to be transported towards the discharge port. In the early stage, the heat energy released by multiple electric heaters completes the heat treatment of the fasteners. In the later stage, the heat treatment completes the heat preservation treatment of the fasteners. During the operation of the conveyor belt, the driven gear on the rotating shaft will drive relative movement with the toothed drive belt. The driven gear rolls on the toothed surface of the toothed drive belt.

[0033] After the heat-treated parts enter the conveyor belt along the slope, they will then pass through the fastener smoothing plate.

[0034] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0035] 1. In this invention, the driven gear drives the fastener turning roller to rotate in the fastener conveying groove, which in turn causes the fastener to turn, making the heating of each part of the fastener relatively uniform during the heat treatment process. This ensures the quality of the fastener after heat treatment. Compared with the prior art, it can heat the fastener uniformly during the heating process, improve the processing quality of the entire batch of fasteners, reduce heat energy waste, and prevent the fasteners from being oxidized during the heat treatment process. This lays the foundation for improving the performance of the fasteners after heat treatment. It can also reduce the consumption of inert gas to a certain extent and reduce the cost of fastener heat treatment.

[0036] 2. In this invention, after the parts to be heat-treated enter the conveyor belt along the slope, they will then pass through the fastener smoothing plate. The fastener smoothing plate has a height limit and can smooth out the stacked fasteners, which improves work efficiency and avoids a decline in processing quality. Moreover, the device is machine-driven and does not require manual labor, making it suitable for assembly line production. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the overall structure of a fastener heat treatment device and method proposed in this invention.

[0038] Figure 2 This is a schematic diagram of the structure of a fastener heat treatment apparatus and method proposed in this invention from another perspective.

[0039] Figure 3 This is a schematic diagram of the disassembled fastener conveying assembly in the fastener heat treatment device and method proposed in this invention.

[0040] Figure 4 This invention provides a fastener heat treatment apparatus and method. Figure 3 Enlarged structural diagram at point A;

[0041] Figure 5 This is a schematic diagram of the fastener conveying groove in a fastener heat treatment device and method proposed in this invention.

[0042] Figure 6 This is a schematic diagram of the disassembled fastener feeding assembly in the fastener heat treatment device and method proposed in this invention.

[0043] Figure 7 This is a schematic diagram of the fastener smoothing component in a fastener heat treatment apparatus and method proposed in this invention.

[0044] Figure 8 This is a schematic diagram of the fastener turning roller in a fastener heat treatment device and method proposed in this invention.

[0045] Figure 9 This invention provides a fastener heat treatment apparatus and method. Figure 6 Enlarged structural diagram at point B;

[0046] Figure 10 This is a structural schematic diagram of the vacuum pumping component disassembled in the fastener heat treatment device and method proposed in this invention;

[0047] Figure 11 This is a schematic diagram of the structure of the first unidirectional flow interception component in the fastener heat treatment device and method proposed in this invention.

[0048] Legend:

[0049] 1. Frame; 2. Fastener conveying assembly; 201. Conveyor roller; 202. Conveyor belt; 203. Motor; 204. Fastener conveying trough; 3. Fastener turning assembly; 301. Rotating shaft; 302. Fastener turning roller; 303. Driven gear; 304. Toothed drive belt; 4. Fastener smoothing assembly; 401. Adapter frame; 402. Fastener smoothing plate; 403. First adapter shaft; 404. First adapter spring; 405. Support rod; 5. Heat treatment furnace body; 6. Electric heater; 7. Discharge port; 8. Fastener feeding assembly; 801. Feeding box; 802. Side box cover; 803. 804. Adapter buckle; 805. Second adapter shaft; 806. Second adapter spring; 807. Sloping panel; 808. Compensation base; 809. Chassis; 8000. Hydraulic cylinder; 810. Limiting rod; 901. Vacuum assembly; 902. Sealing box cover; 903. Piston rod; 904. Piston cylinder; 905. Piston spring; 906. Suction hole; 10. First one-way flow interception assembly; 1001. One-way flow interception pipe; 1002. Bucket-shaped cover; 1003. Sealing plug; 1004. Mesh panel; 1005. Sliding rod; 1006. Second support spring; 11. Second one-way flow interception assembly. Detailed Implementation

[0050] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0051] Please see the appendix Figure 1 -Appendix Figure 11 The present invention provides a technical solution: a fastener heat treatment device, including a frame 1, a fastener conveying assembly 2 embedded in the inner side of the frame 1, the fastener conveying assembly 2 including a conveyor belt 202 for conveying fasteners, a plurality of fastener conveying grooves 204 are opened on the conveying surface of the conveyor belt 202, a fastener flipping assembly 3 is embedded between the plurality of fastener conveying grooves 204 and the frame 1, the fastener flipping assembly 3 including a plurality of fastener flipping rollers 302, the plurality of fastener flipping rollers 302 are rotatably connected in the plurality of fastener conveying grooves 204 respectively, for driving the fasteners to flip;

[0052] A heat treatment furnace body 5 is connected to the frame 1 corresponding to the conveyor belt 202. Multiple electric heaters 6 are installed inside the heat treatment furnace body 5. A discharge port 7 is opened at one end of the heat treatment furnace body 5 along the transmission direction of the conveyor belt 202. Fastener smoothing components 4 are embedded inside the heat treatment furnace body 5.

[0053] Specifically, the fastener conveying assembly 2 also includes multiple conveying rollers 201, which are rotatably connected to the port at the top of the frame 1. The multiple conveying rollers are connected by a conveyor belt 202. A motor 203 is installed at the end of one of the conveying rollers, and the motor 203 is mounted on the frame 1.

[0054] Specifically, the fastener flipping assembly 3 also includes multiple sets of rotating shafts 301, which are rotatably connected to multiple fastener conveying grooves 204, and multiple sets of fastener flipping rollers 302 are fixedly sleeved on the multiple sets of rotating shafts 301.

[0055] The fastener turning roller 302 is embedded in the fastener conveying groove 204, and multiple corrugated grooves in a ring array are opened on the roller surface of the fastener turning roller 302.

[0056] A driven gear 303 is fixedly sleeved on the rotating shaft 301. The driven gear 303 is located on one side of the conveyor belt 202. The tooth surfaces of multiple driven gears 303 are meshed with the same tooth surface drive belt 304. The tooth surface drive belt 304 is embedded in the inner side of the frame 1.

[0057] Specifically, the fastener smoothing assembly 4 includes an adapter frame 401, which is embedded in the heat treatment furnace body 5. The inner side of the adapter frame 401 is provided with a fastener smoothing plate 402. The end of the fastener smoothing plate 402 is connected to a first adapter shaft 403. The fastener smoothing plate 402 is rotatably connected to the adapter frame 401 through the first adapter shaft 403. A first adapter spring 404 is sleeved on the first adapter shaft 403. The fastener smoothing plate 402 is elastically connected to the adapter frame 401 through the first adapter spring 404.

[0058] A support rod 405 is connected to the adapter frame 401, and the other end of the support rod 405 is connected to the inner top of the heat treatment furnace body 5.

[0059] Specifically, a fastener feeding assembly 8 is embedded in the heat treatment furnace body 5. The fastener feeding assembly 8 is tangent to the conveyor belt and is used to seal the heat treatment furnace body 5.

[0060] The fastener feeding assembly 8 includes a feeding box 801, which is embedded in the heat treatment furnace body 5. A side cover 802 is provided on the side end face of the feeding box 801. The side cover 802 is tangent to the conveyor belt. A connecting buckle 803 is connected to the side end face of the feeding box 801 corresponding to the side cover 802. A second connecting shaft 804 is connected to the end face of the side cover 802. A winding groove is opened at the end of the second connecting shaft 804. The side cover 802 is rotatably connected to the connecting buckle 803 through the second connecting shaft 804. A second connecting spring 805 is sleeved on the second connecting shaft 804. The side cover 802 is elastically connected to the connecting buckle 803 through the second connecting spring 805. A sloped panel 806 is connected to the bottom of the inner side of the feeding box 801.

[0061] The bottom of the feeding box 801 is connected to a compensation base 807. The bottom of the compensation base 807 is provided with a telescopic groove. A telescopic shaft is sleeved in the telescopic groove. The end of the telescopic shaft is connected to a first support spring. The telescopic shaft is elastically supported and connected to the telescopic groove through the first support spring. The other end of the telescopic shaft is connected to a chassis 808. The bottom of the heat treatment furnace body 5 is connected to a limit rod 810 corresponding to the chassis 808. A hydraulic cylinder 809 is installed on the side of the compensation base 807.

[0062] Specifically, a vacuum assembly 9 for extracting air from the inside of the feeding box 801 is embedded in the heat treatment furnace body 5 corresponding to the feeding box 801. The vacuum assembly 9 includes a sealing box cover 901, which is embedded in the heat treatment furnace body 5. A piston rod 902 is connected to the sealing box cover 901. A sleeve is snapped onto the piston rod 902 on the heat treatment furnace body 5. The other end of the piston rod 902 passes through the sleeve and is connected to a piston plate 903. A piston cylinder 904 is connected to the piston plate 903 on the heat treatment furnace body 5 corresponding to the piston plate 903. A piston spring 905 is connected to the piston plate 903. The piston plate 903 is elastically supported and connected to the top of the piston cylinder 904 through the piston spring 905.

[0063] Specifically, an exhaust pipe is connected to the outer wall of the piston cylinder 904 below the piston plate 903. A second one-way flow-blocking component 11 is installed inside the exhaust pipe. A suction hole 906 is opened at the bottom of the sealing box cover 901. The sealing box cover 901 is connected to the inside of the piston rod 902 through the suction hole 906. A first one-way flow-blocking component 10 is embedded in the suction hole 906.

[0064] Specifically, the first one-way flow interception component 10 and the second one-way flow interception component 11 have the same structure. The first one-way flow interception component 10 includes a one-way flow interception tube 1001, which is embedded in the suction hole 906. A funnel-shaped cover 1002 is snapped into the port of the one-way flow interception tube 1001. A sealing plug 1003 is sealed inside the funnel-shaped cover 1002. A sliding rod 1005 is connected to the other end of the sealing plug 1003. A mesh panel 1004 is sleeved on the other end of the sliding rod 1005. The mesh panel 1004 is snapped into the one-way flow interception tube 1001. A second support spring 1006 is sleeved on the sliding rod 1005. The mesh panel 1004 is elastically supported and connected to the sealing plug 1003 through the second support spring 1006.

[0065] A method for heat treatment of fasteners, comprising:

[0066] In the initial stage, the feeding box 801 is located below the heat treatment furnace body 5, and the sealing box cover 901 is located inside the lower port of the heat treatment furnace body 5. The sealing box cover 901 is also tangent to the conveying surface of the conveyor belt 202. Therefore, the heat treatment furnace body 5 is in a relatively sealed state. Since the electric heater 6 releases a large amount of heat energy during the power-on operation, the air pressure inside the heat treatment furnace body 5 is greater than the external air pressure.

[0067] A feeding mechanism for fasteners is installed inside the frame 1. The feeding mechanism is controlled to transport and feed the fasteners to be heat-treated. When the fasteners are transported to the end, they fall freely into the feeding box 801. After the feeding box 801 is full, the built-in control system of the fastener heat treatment device automatically stops the feeding mechanism. Then, the built-in control system controls the hydraulic cylinder 809 to extend, pushing the feeding box 801, which is connected to the compensation base 807, upward into the heat treatment furnace body 5. When 802 is connected to the sealing box cover 901, the sealing box cover 901 seals the feeding box 801. The built-in control system controls the hydraulic cylinder 809 to continue to extend. At this time, the side box cover 802 replaces the sealing box cover 901 and is connected to the conveyor belt 202. Therefore, the lower port of the heat treatment furnace body 5 is still in a relatively sealed state. In the subsequent process, the feeding box 801 and the side box cover 802 will push the sealing box cover 901 upward. During the upward movement of the sealing box cover 901, the piston rod 902 pushes the piston plate 903 to move upward in the piston cylinder 904.

[0068] The air pressure inside the piston cylinder 904 corresponding to the piston plate 903 will gradually decrease. The first one-way intercepting internal sealing plug 1003 will gradually move away from the bucket-shaped cover 1002. At the same time, the sealing plug 1003 will also push the sliding rod 1005 to slide inside the mesh panel 1004 and compress the second support spring 1006 to cause elastic deformation. The gradual movement of the sealing plug 1003 away from the bucket-shaped cover 1002 will release the sealing effect on the bucket-shaped cover 1002. At this time, the one-way intercepting pipe 1001 is in a conductive state, so the air in the feeding box 801 will be drawn into the piston cylinder 904. After the feeding box 801 is completely inside the heat treatment furnace body 5, the compensating base 807 replaces the feeding box 801 and the side cover 802 to the heat treatment furnace body 5. When the lower port is blocked, the hydraulic cylinder 809 continues to extend. When the limit rod 810 connects with the protruding part of the chassis 808, the chassis 808 cannot continue to move upward under the restriction of the limit rod 810. The chassis 808 extends in the telescopic groove through the telescopic rod and pulls the first support spring to cause elastic deformation. A rope is wound and connected between the protruding part of the chassis 808 and the winding groove at the end of the second adapter shaft 804. Since the chassis 808 cannot continue to move upward, it will generate tension on the rope. The rope wound and connected in the winding groove is gradually released and generates torque on the winding groove. Under the action of torque, the second adapter shaft 804 drives the side cover 802 to rotate. The side cover 802 opens and twists the second adapter spring 805 to cause elastic deformation.

[0069] After the side cover 802 is opened, the fasteners to be heat-treated in the loading box 801 roll along the slope formed by the slope panel 806 and the cover of the loading box 801 towards the conveyor belt 202. The conveyor belt 202 drives the fasteners to be transported towards the discharge port 7. In the early stage, the heat energy released by multiple electric heaters 6 completes the heat treatment of the fasteners. In the later stage, the heat treatment unit completes the heat preservation treatment of the fasteners. During the operation of the conveyor belt 202, the driven gear 303 on the rotating shaft 301 will move relative to the toothed drive belt 304. The driven gear 303 rolls on the toothed surface of the toothed drive belt 304.

[0070] After the heat-treated parts enter the conveyor belt 202 along the slope, they will then pass through the fastener smoothing plate 402.

[0071] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A fastener heat treatment apparatus, comprising a frame (1), characterized in that, The frame (1) is fitted with a fastener conveying assembly (2) on its inner side. The fastener conveying assembly (2) includes a conveyor belt (202) for conveying fasteners. Multiple fastener conveying grooves (204) are opened on the conveying surface of the conveyor belt (202). A fastener flipping assembly (3) is embedded between the multiple fastener conveying grooves (204) and the frame (1). The fastener flipping assembly (3) includes multiple sets of fastener flipping rollers (302). The multiple sets of fastener flipping rollers (302) are rotatably connected to the multiple fastener conveying grooves (204) to drive the fasteners to flip. The frame (1) is connected to the corresponding conveyor belt (202) with a heat treatment furnace body (5). Multiple electric heaters (6) are installed inside the heat treatment furnace body (5). The heat treatment furnace body (5) has a discharge port (7) at one end along the transmission direction of the conveyor belt (202). Fastener smoothing components (4) are embedded inside the heat treatment furnace body (5). The fastener flipping assembly (3) also includes multiple sets of rotating shafts (301), which are rotatably connected to multiple fastener conveying grooves (204), and multiple sets of fastener flipping rollers (302) are fixedly sleeved on the multiple sets of rotating shafts (301). The fastener turning roller (302) is embedded in the fastener conveying groove (204), and the roller surface of the fastener turning roller (302) is provided with multiple corrugated grooves arranged in a ring array. A driven gear (303) is fixedly sleeved on the rotating shaft (301). The driven gear (303) is located on one side of the conveyor belt (202). The tooth surfaces of multiple driven gears (303) are meshed with the same tooth surface drive belt (304). The tooth surface drive belt (304) is embedded in the inner side of the frame (1). The fastener smoothing assembly (4) includes an adapter frame (401), which is embedded in the heat treatment furnace body (5). The inner side of the adapter frame (401) is provided with a fastener smoothing plate (402). The end of the fastener smoothing plate (402) is connected to a first adapter shaft (403). The fastener smoothing plate (402) is rotatably connected to the adapter frame (401) through the first adapter shaft (403). A first adapter spring (404) is sleeved on the first adapter shaft (403). The fastener smoothing plate (402) is elastically connected to the adapter frame (401) through the first adapter spring (404). The adapter frame (401) is connected to a support rod (405), and the other end of the support rod (405) is connected to the inner top of the heat treatment furnace body (5).

2. The fastener heat treatment apparatus according to claim 1, characterized in that, The fastener conveying assembly (2) also includes multiple conveyor rollers (201), which are rotatably connected to the port at the top of the frame (1). The multiple conveyor rollers are connected by a conveyor belt (202). A motor (203) is installed at the end of one of the conveyor rollers. The motor (203) is mounted on the frame (1).

3. The fastener heat treatment apparatus according to claim 1, characterized in that, The heat treatment furnace body (5) is embedded with a fastener feeding assembly (8), which is tangent to the conveyor belt and is used to seal the heat treatment furnace body (5). The fastener feeding assembly (8) includes a feeding box (801), which is embedded in the heat treatment furnace body (5). A side cover (802) is provided on the side end face of the feeding box (801). The side cover (802) is tangent to the conveyor belt. An adapter buckle (803) is connected to the side end face of the feeding box (801) corresponding to the side cover (802). A second adapter shaft (804) is connected to the end face of the side cover (802). The end of the second adapter shaft (804) is provided with a winding groove. The side cover (802) is rotatably connected to the adapter buckle (803) through the second adapter shaft (804). The second adapter shaft (804) is fitted with a second adapter spring (805). The side cover (802) is elastically connected to the adapter buckle (803) through the second adapter spring (805). The bottom of the inner side of the feeding box (801) is connected with a slope panel (806). The bottom of the feeding box (801) is connected to a compensation base (807). The bottom of the compensation base (807) is provided with a telescopic groove. A telescopic shaft is sleeved in the telescopic groove. The end of the telescopic shaft is connected to a first support spring. The telescopic shaft is elastically supported and connected to the telescopic groove through the first support spring. The other end of the telescopic shaft is connected to a chassis (808). The bottom of the heat treatment furnace body (5) is connected to a limit rod (810) corresponding to the chassis (808). A hydraulic cylinder (809) is installed on the side of the compensation base (807).

4. The fastener heat treatment apparatus according to claim 3, characterized in that, The heat treatment furnace body (5) is equipped with a vacuum assembly (9) for extracting air from the inside of the feeding box (801) corresponding to the feeding box (801). The vacuum assembly (9) includes a sealing box cover (901), which is embedded in the heat treatment furnace body (5). A piston rod (902) is connected to the sealing box cover (901). A sleeve is snapped onto the piston rod (902) on the heat treatment furnace body (5). The other end of the piston rod (902) passes through the sleeve and is connected to a piston plate (903). A piston cylinder (904) is connected to the piston plate (903) on the heat treatment furnace body (5). A piston spring (905) is connected to the piston plate (903). The piston plate (903) is elastically supported and connected to the piston cylinder (904) through the piston spring (905).

5. The fastener heat treatment apparatus according to claim 4, characterized in that, The outer wall of the piston cylinder (904) is connected to the piston plate (903) below the piston. The exhaust pipe is fitted with a second one-way flow-blocking component (11). The bottom of the sealing box cover (901) is provided with a suction hole (906). The sealing box cover (901) is connected to the piston rod (902) through the suction hole (906). The suction hole (906) is embedded with a first one-way flow-blocking component (10).

6. The fastener heat treatment apparatus according to claim 5, characterized in that, The first one-way flow interception component (10) and the second one-way flow interception component (11) have the same structure. The first one-way flow interception component (10) includes a one-way flow interception tube (1001), which is embedded in the suction hole (906). A funnel-shaped cover (1002) is snapped into the port of the one-way flow interception tube (1001). A sealing plug (1003) is sealed inside the funnel-shaped cover (1002). A sliding rod (1005) is connected to the other end of the sealing plug (1003). A mesh panel (1004) is sleeved on the other end of the sliding rod (1005). The mesh panel (1004) is snapped into the one-way flow interception tube (1001). A second support spring (1006) is sleeved on the sliding rod (1005). The mesh panel (1004) is elastically supported and connected to the sealing plug (1003) through the second support spring (1006).

7. A fastener heat treatment method according to claim 6, characterized in that, include: In the initial stage, the feeding box (801) is located below the heat treatment furnace body (5), and the sealing box cover (901) is located inside the lower port of the heat treatment furnace body (5). The sealing box cover (901) is also tangent to the conveying surface of the conveyor belt (202). Therefore, the heat treatment furnace body (5) is in a relatively sealed state. Since the electric heater (6) releases a large amount of heat energy during the power-on operation, the air pressure inside the heat treatment furnace body (5) is greater than the external air pressure. A feeding mechanism for fastener feeding is installed inside the frame (1). The feeding mechanism is controlled to transport and feed the fasteners to be heat-treated. When the fasteners are transported to the tail end, they fall freely into the feeding box (801). After the feeding box (801) is full, the built-in control system of the fastener heat treatment device automatically controls the feeding mechanism to stop operating. Then, the built-in control system controls the hydraulic cylinder (809) to extend and push the feeding box (801) connected to the compensation base (807) upward into the heat treatment furnace body (5). After the feeding box (801) and the side cover (802) are sealed, the feeding mechanism is fully loaded. When the lid (901) is connected, the sealing lid (901) seals the feeding box (801), and the built-in control system controls the hydraulic cylinder (809) to continue to extend. At this time, the side lid (802) replaces the sealing lid (901) and connects to the conveyor belt (202). Therefore, the lower port of the heat treatment furnace body (5) is still in a relatively sealed state. In the subsequent process, the feeding box (801) and the side lid (802) will push the sealing lid (901) upward. During the upward movement of the sealing lid (901), the piston plate (903) is pushed upward in the piston cylinder (904) by the piston rod (902). The air pressure inside the piston cylinder (904) corresponding to the piston plate (903) will gradually decrease. The first one-way intercepting internal sealing plug (1003) will gradually move away from the bucket-shaped cover (1002). At the same time, the sealing plug (1003) will push the sliding rod (1005) to slide inside the mesh panel (1004) and squeeze the second support spring (1006) to make it elastically deform. The gradual movement of the sealing plug (1003) away from the bucket-shaped cover (1002) will release the sealing effect on the bucket-shaped cover (1002). At this time, the one-way intercepting pipe (1001) is in a conductive state. Therefore, the air in the feeding box (801) will be sucked into the piston cylinder (904). After the feeding box (801) is completely inside the heat treatment furnace body (5), the compensation base (807) replaces the feeding box (801) and the side box cover (802) for heat treatment. The lower port of the furnace body (5) is sealed, the hydraulic cylinder (809) continues to extend, and when the limit rod (810) connects with the protruding part of the chassis (808), the chassis (808) cannot continue to move upward under the restriction of the limit rod (810). The chassis (808) extends in the telescopic groove through the telescopic rod and pulls the first support spring to make it elastically deformed. The protruding part of the chassis (808) is connected to the winding groove at the end of the second adapter shaft (804) with a rope. Since the chassis (808) cannot continue to move upward, it will generate tension on the rope. The rope connected in the winding groove is gradually released and generates torque on the winding groove. Under the action of torque, the second adapter shaft (804) drives the side box cover (802) to rotate. The side box cover (802) opens and twists the second adapter spring (805) to make it elastically deformed. After the side box cover (802) is opened, the fasteners to be heat-treated in the loading box (801) roll along the slope formed by the slope panel (806) and the cover of the loading box (801) towards the conveyor belt (202). The conveyor belt (202) drives the fasteners to be transported towards the discharge port (7). In the early stage, the heat energy released by multiple electric heaters (6) completes the heat treatment of the fasteners. In the later stage, the heat treatment unit completes the heat preservation treatment of the fasteners. During the operation of the conveyor belt (202), the driven gear (303) on the rotating shaft (301) will be driven to move relative to the toothed drive belt (304). The driven gear (303) rolls on the toothed surface of the toothed drive belt (304). After the heat-treated part enters the conveyor belt (202) along the slope, it will then pass through the fastener smoothing plate (402).

Images