Hard alloy degreasing sintering furnace and working method thereof

Abstract

The invention discloses a hard alloy degreasing sintering furnace and a working method thereof, and relates to the technical field of hard alloy production.The hard alloy degreasing sintering furnace comprises a furnace body, a fixing ring is arranged at the end opening of the furnace body, an annular fire-resistant ring is installed on the fixing ring, and a plugging disc is installed in the center of the fire-resistant ring in a matched mode; a furnace mouth blocking mechanism is arranged between the blocking disc and the rack, a guide rail driving assembly is arranged at the end opening of the furnace body, two transverse driving mechanisms are movably installed on the guide rail driving assembly, one transverse driving mechanism is connected with a locking driving assembly and an extraction mechanism, the locking driving assembly is connected with a locking mechanism, and the extraction mechanism is connected with an extraction mechanism. The other group of transverse driving mechanism is connected with an extraction mechanism; butt joint of the movable guide rail and the in-furnace guide rail is achieved through the guide rail driving assembly, feeding and discharging control is completed in combination with the extraction mechanism and the transverse driving mechanism, locking of the furnace mouth blocking mechanism is achieved through the locking mechanism and the locking driving assembly, and reliable operation of the sintering process is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of cemented carbide production, in particular to a cemented carbide degreasing sintering furnace and a working method thereof. Background Art

[0002] The cemented carbide debinding and sintering furnace is a key equipment in the cemented carbide production process. It includes the debinding stage and the sintering stage. In the debinding stage, for cemented carbide produced by powder metallurgy, binders (such as paraffin, etc.) are usually used in the molding process. The debinding sintering furnace must first remove these binders. During the debinding process, the binder is gradually decomposed and volatilized at a lower temperature by precisely controlling the temperature, atmosphere and other parameters in the furnace. Generally, a lower heating rate is used to prevent the binder from volatilizing too quickly and causing defects in the blank, such as cracks. After debinding is completed, the sintering stage begins. At this time, the temperature in the furnace rises to a very high temperature (usually 1300-1500 degrees Celsius or even higher, depending on the composition of the cemented carbide). At high temperatures, diffusion and fusion occur between cemented carbide powder particles, making the powder dense, thereby improving the hardness, strength and wear resistance of the cemented carbide.

[0003] The existing degreasing sintering furnace has the problem of low sintering feeding and discharging efficiency during the cemented carbide production process. The degree of automation of sending the sintered body into the furnace before sintering is weak. After sintering, it is necessary to wait for the furnace body to drop to a certain temperature before opening the discharge, which further affects the cemented carbide production efficiency. Summary of the invention

[0004] The object of the present invention is to provide a cemented carbide degreasing sintering furnace and a working method thereof to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A cemented carbide degreasing sintering furnace comprises a furnace body and a heating coil. Two sets of furnace guide rails are arranged in the furnace body, and a sintering table is installed between the furnace guide rails. The furnace body is characterized in that a sealing disc is installed at the port of the furnace body, a furnace mouth sealing mechanism is arranged between the sealing disc and the furnace body, and a guide rail driving assembly is arranged outside the furnace body port, and the guide rail driving assembly comprises a movable guide rail docked with the furnace guide rail.

[0006] Two groups of transverse driving mechanisms are movably installed on the movable guide rail, one group of which is connected with a locking driving assembly and an extracting mechanism, and this group of transverse driving mechanisms carries the locking driving assembly and the locking mechanism and is connected with the blocking disc; the other group of transverse driving mechanisms is connected with a push-pull assembly, and this group of transverse driving mechanisms, in combination with the push-pull assembly, drives the sintering table to move between the guide rail in the furnace and the movable guide rail.

[0007] The locking drive assembly includes a vertical column connected to the horizontal driving mechanism, and the vertical column is connected to a transfer motor and a cross in sequence, and the upper end of the cross is connected to a telescopic cylinder 1, a ladder frame 1 and a locking mechanism in sequence; the extraction mechanism is connected to the lower end of the cross, and the extraction mechanism includes a telescopic cylinder 2, a ladder frame 2, an adsorption frame and a docking block, and the docking block cooperates with the sealing disc.

[0008] As a further solution of the present invention: the guide rail driving assembly includes a plurality of groups of mounting columns that are distributed and fixedly installed, a transverse mounting frame is fixedly connected between the mounting columns, the movable guide rail is slidably installed on the top of the mounting column, the movable guide rail is symmetrically arranged on both sides of the transverse mounting frame, a connecting frame is arranged between the movable guide rails, a mounting frame is arranged at the bottom of the connecting frame, a mating gear is rotatably installed on the mounting frame, the mating gear is connected to a driving motor, a rack is arranged on the transverse mounting frame, the mating gear and the rack are meshed with each other, and the movable guide rail is connected to the end of the guide rail in the furnace under the drive of the driving motor.

[0009] As a further scheme of the present invention: the transverse driving mechanism includes a matching frame, which is slidably installed between the matching frame and the movable guide rail, and the matching frame is continuously arranged in two groups, a connecting plate is arranged between the two groups of matching frames, a walking motor is arranged on the connecting plate, a mounting plate is fixedly connected to the bottom of the connecting plate, the mounting plate and the connecting plate are fixedly connected, contact wheels are rotatably installed at both ends of the mounting plate, the contact wheel is in contact with the side of the movable guide rail, a gear 1 and a gear 2 are arranged at the bottom of the mounting plate, the gear 1 and the gear 2 are meshed with each other, the gear 1 is connected to the walking motor, the gear 1 and the gear 2 are respectively coaxially connected with a driving pulley, the contact wheel is coaxially installed with a driven pulley, and a transmission belt is arranged between the contact wheel and the driven pulley.

[0010] As a further solution of the present invention: the furnace mouth sealing mechanism includes a symmetrically fixedly installed connecting angle iron, a rotating motor is arranged on the connecting angle iron, the output shaft of the rotating motor is connected to a semicircular frame, a semicircular sealing disk is arranged in the semicircular frame, a connecting angle iron is arranged on the semicircular frame, a rotating motor is arranged on the connecting angle iron, the output shaft of the rotating motor is connected to a semicircular frame, a semicircular sealing disk is arranged in the semicircular frame, and the locking mechanism cooperates with the semicircular sealing disk.

[0011] As a further solution of the present invention: the locking mechanism includes a docking disk arranged between two semicircular sealing disks, the inner ring of the two semicircular sealing disks is provided with a positioning groove, the outer ring of the docking disk is provided with a positioning protrusion at a position corresponding to the positioning groove, a rotating disk is rotatably installed at the center of the docking disk, a plurality of push-pull rods are evenly rotatably installed in the rotating disk, a plurality of locking rods are plugged into the docking disk corresponding to the push-pull rods, the push-pull rods are rotatably installed between the locking rods, a plug-in hole is provided at a position corresponding to the locking rod in the two semicircular sealing disks, the locking rod and the plug-in hole cooperate with each other, a plug-in shaft is plugged into the center of the rotating disk, and the plug-in shaft is connected to the locking drive assembly.

[0012] As a further solution of the present invention: the locking drive assembly also includes a sliding rod 1 connected to the ladder frame 1, the sliding rod 1 is plugged into the end of the cross, the upper side of the ladder frame 1 is provided with a clamping groove, the clamping groove is slidably engaged with the upper edge of the cross, and the end of the ladder frame 1 is provided with a mounting disc, the mounting disc is fixedly connected to the docking disc through evenly arranged connecting columns, and a rotating motor is provided on the mounting disc, and the rotating motor is dynamically connected to the plug-in shaft.

[0013] As a further solution of the present invention: a second slide rod is provided on the second step frame, and the second slide rod is plugged into the end of the cross, and a magnetic hole is provided at a position corresponding to the docking block on the sealing disc, and the docking block and the magnetic hole cooperate with each other, and the sealing disc is installed in cooperation with the end of the furnace mouth through a refractory ring and a fixing ring.

[0014] As a further solution of the present invention: an atmosphere control system is arranged on the furnace body, and the atmosphere control system includes an air duct arranged on the top of the furnace body, the air duct is connected with a connecting pipe, the connecting pipe is provided with an opening and closing valve and a pressure gauge, and the end of the connecting pipe is provided with a joint 1 and a joint 2 which are continuously arranged, the joint 1 is connected to an inert gas tank, the joint 2 is connected to a vacuum machine, and the connecting pipes are symmetrically arranged on the top of the furnace body.

[0015] As a further solution of the present invention: the push-pull assembly includes a telescopic cylinder three, the telescopic cylinder three is connected to an extension rod, the extension rod is connected to an adsorption block, sliding frames are provided at both ends of the sintering table, the sintering table is slidably installed between the sliding frames and the guide rails in the furnace, and the adsorption block and the sliding frame on the side of the sintering table facing the furnace mouth are adsorbed on each other.

[0016] A working method of the cemented carbide degreasing sintering furnace as described above comprises the following steps: S1, feeding, the guide rail driving assembly drives the moving guide rail to dock with the furnace guide rail in the furnace body, and the lateral driving mechanism and the push-pull assembly drive the sintering table and the sintered body on the sintering table into the furnace guide rail inside the furnace body, and then controls the push-pull assembly to exit the furnace body; S2, close the furnace body, and use the adsorption rack and the docking block in the extraction mechanism to dock the blocking disc with the refractory ring at the end of the furnace body, and then combine the furnace mouth blocking mechanism to make the semicircular blocking disc 1 and the semicircular blocking disc 2 rotate and close, forming a limit for the blocking disc, and then combine the locking mechanism to lock the semicircular blocking disc 2; S3, sintering, first vacuuming the furnace body through the atmosphere control system, first heating up the sintered body for degreasing, after degreasing, extracting the gas generated by decomposition of degreasing, and finally introducing inert gas argon into the furnace body, and heating up the furnace for sintering; S4, discharging, after sintering, the lock of the semicircular blocking plate 2 is released through the locking drive component and the locking mechanism, and the furnace body is opened in combination with the furnace mouth blocking mechanism. Finally, the extraction mechanism is driven by the horizontal driving mechanism to open the blocking disc, and the sintering table is taken out in combination with the push-pull component and transferred to the moving guide rail.

[0017] Compared with the prior art, the present invention has the following beneficial effects: (1) The movable step frame 2 drives the adsorption frame to approach the blocking disc, and cooperates with the magnetic suction hole on the blocking disc to adsorb, so as to grasp the blocking disc, control the blocking disc to cooperate or disengage with the end of the furnace mouth, and assist in feeding or discharging. When driving the sintering table, the lateral driving mechanism carries the telescopic cylinder 3 and the adsorption block to contact and adsorb with the end of the sliding frame, thereby driving the sintering table between the sliding frames to move back and forth on the guide rails in the furnace and the moving guide rails, so as to realize the feeding and discharging of materials before and after sintering.

[0018] (2) The matching frame drives gear 1 and gear 2 to mesh through the travel motor, and transmits power to the contact wheel in combination with the driving pulley and the driven pulley. Since the contact wheel is tightly installed between the moving guide rails, the rotation of the contact wheel will drive the matching frame as a whole to move horizontally along the moving guide rails, thereby carrying the locking drive assembly and the extraction mechanism close to the furnace mouth to perform loading and unloading and furnace mouth opening and closing operations.

[0019] (3) When the sintering table carries the sintered body into the furnace body, the guide rail driving assembly controls the moving guide rail to leave the furnace mouth. At this time, the semicircular frame 1 and the semicircular sealing disk 1 are driven to close by the rotating motor 1, and the semicircular frame 2 and the semicircular sealing disk 2 are driven to close by the rotating motor 2, so as to limit the sealing disk and provide heat insulation. Finally, the semicircular sealing disk 2 is closed by the locking mechanism to realize the locking control of the furnace mouth, thereby ensuring the normal operation of the subsequent atmosphere control system in the furnace body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 It is a schematic diagram of the connection between the furnace body and the furnace mouth blocking mechanism and the locking mechanism in the present invention.

[0022] Figure 3 It is a schematic diagram of the connection between the furnace mouth blocking mechanism and the locking mechanism in the present invention.

[0023] Figure 4 It is a structural schematic diagram of the furnace mouth blocking mechanism in the present invention.

[0024] Figure 5 It is a structural schematic diagram of the locking mechanism in the present invention.

[0025] Figure 6 It is a schematic diagram of the structure of the sealing disc in the present invention.

[0026] Figure 7 It is a schematic diagram of the installation of the guide rail drive assembly in the present invention.

[0027] Figure 8 for Figure 7 Enlarged structural diagram at A in the middle.

[0028] Fig. 9 It is a schematic diagram of the structure of the locking drive assembly and the extraction mechanism in the present invention.

[0029] Fig.10 It is a structural schematic diagram of the lateral driving mechanism in the present invention.

[0030] Fig.11 It is a schematic diagram of the structure inside the furnace body of the present invention.

[0031] Fig.12 It is a schematic diagram of the connection structure between the furnace body and the atmosphere control system in the present invention.

[0032] In the figure: 1, furnace body; 10, fixing ring; 11, refractory ring; 12, sealing disc; 120, magnetic suction hole; 100, heating coil; 101, guide rail in furnace; 102, sliding frame; 103, sintering table; 2, furnace mouth sealing mechanism; 20, connecting angle iron 1; 21, rotating motor 1; 22, semicircular frame 1; 23, semicircular sealing disc 1; 24, connecting angle iron 2; 25, rotating motor 2; 26, semicircular frame 2; 27, semicircular blocking plate 2; 28, plug hole; 29, positioning groove; 3, locking mechanism; 30, docking plate; 31, positioning protrusion; 32, rotating plate; 33, push-pull rod; 34, locking rod; 35, plug-in shaft; 4, locking drive assembly; 40, vertical column; 41, indexing motor; 42, cross; 43, ladder frame 1; 44, slide rod 1; 45, telescopic cylinder 1; 46, card-connecting slide groove; 47, Mounting disc; 48, rotating motor; 49, connecting column; 5, extraction mechanism; 50, sliding rod 2; 51, telescopic cylinder 2; 52, step frame 2; 53, adsorption frame; 54, docking block; 55, telescopic cylinder 3; 56, extension rod; 57, adsorption block; 6, transverse driving mechanism; 60, matching frame; 61, walking motor; 62, connecting plate; 63, mounting plate; 64, contact wheel; 65, gear 1; 66, gear 2; 67, driving pulley; 68, transmission belt; 69, driven pulley; 7, guide rail drive assembly; 70, moving guide rail; 71, transverse mounting frame; 72, connecting frame; 73, mounting frame; 74, matching gear; 75, rack; 76, driving motor; 77, mounting column; 8, atmosphere control system; 80, air duct; 81, connecting pipe; 82, pressure gauge; 83, connector 1; 84, connector 2. DETAILED DESCRIPTION

[0033] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by terms such as “longitudinal”, “lateral”, “upper”, “lower”, “top”, “bottom”, “inside” and “outside” are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] In addition, the terms "one" and "two" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "one" or "two" may explicitly or implicitly include one or more of the feature. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] The technical solution of the present invention is further described in detail below in conjunction with specific implementation methods.

[0037] like Figure 1 , Figure 2 , Figure 3 , Fig.11 , Fig.12 As shown, a cemented carbide degreasing sintering furnace includes a furnace body 1 and a heating coil 100. Two groups of furnace guide rails 101 are arranged in the furnace body 1. A sintering table 103 is installed between the furnace guide rails 101. It is characterized in that a sealing disc 12 is installed at the port of the furnace body 1, a furnace mouth sealing mechanism 2 is arranged between the sealing disc 12 and the furnace body 1, and a guide rail driving assembly 7 is arranged outside the port of the furnace body 1. The guide rail driving assembly 7 includes a movable guide rail 70 docked with the furnace guide rail 101.

[0038] Two groups of transverse driving mechanisms 6 are movably installed on the movable guide rail 70, one group of transverse driving mechanisms 6 is connected to the locking driving assembly 4 and the extraction mechanism 5, and this group of transverse driving mechanisms 6 carries the locking driving assembly 4 and the locking mechanism 3 to connect with the blocking disc 12; the other group of transverse driving mechanisms 6 is connected to the push-pull assembly, and this group of transverse driving mechanisms 6, in combination with the push-pull assembly, drives the sintering table 103 to move between the guide rail 101 in the furnace and the movable guide rail 70.

[0039] The locking drive assembly 4 includes a vertical column 40 connected to the horizontal drive mechanism 6, and the vertical column 40 is connected with a transfer motor 41 and a cross 42 in sequence, and the upper end of the cross 42 is connected with a telescopic cylinder 45, a step frame 43 and a locking mechanism 3 in sequence; the extraction mechanism 5 is connected to the lower end of the cross 42, and the extraction mechanism 5 includes a telescopic cylinder 51, a step frame 52, an adsorption frame 53 and a docking block 54, and the docking block 54 cooperates with the blocking disc 12.

[0040] Specifically, the movable step frame 2 52 drives the adsorption frame 53 to approach the blocking disc 12, thereby grabbing the blocking disc 12, controlling the blocking disc 12 to cooperate or disengage with the end of the furnace mouth, and assisting in the feeding or discharging operation. When the sintering table 103 is driven, the lateral driving mechanism 6 is combined with the push-pull assembly to drive the sintering table 103 to move between the guide rail 101 in the furnace and the moving guide rail 70, thereby realizing the feeding and discharging of materials before and after sintering.

[0041] It should be noted that the two sets of transverse driving mechanisms 6 are independently arranged, and the transverse driving mechanism 6 on the side close to the port of the furnace body 1 is combined with a push-pull assembly to be pushed onto the guide rail 101 in the furnace.

[0042] Further, such as Figure 7 , Figure 8 As shown, the guide rail driving assembly 7 includes a plurality of groups of mounting columns 77 that are distributed and fixedly installed, and a transverse mounting frame 71 is fixedly connected between the mounting columns 77. The movable guide rail 70 is slidably installed on the top of the mounting column 77. The movable guide rail 70 is symmetrically arranged on both sides of the transverse mounting frame 71. A connecting frame 72 is arranged between the movable guide rails 70, and a mounting frame 73 is arranged at the bottom of the connecting frame 72. A matching gear 74 is rotatably installed on the mounting frame 73, and the matching gear 74 is connected to a driving motor 76. A rack 75 is arranged on the transverse mounting frame 71, and the matching gear 74 and the rack 75 are meshed with each other. Driven by the driving motor 76, the movable guide rail 70 is docked with the end of the guide rail 101 in the furnace.

[0043] Specifically, before feeding, the furnace mouth blocking mechanism 2 is opened, at which time the driving motor 76 in the guide rail driving assembly 7 drives the movable guide rail 70 to move horizontally, and finally contacts with the end of the guide rail 101 in the furnace, and then drives the sintering table 103 to be transferred from the movable guide rail 70 to the guide rail 101 in the furnace through the horizontal driving mechanism 6, and then the guide rail driving assembly 7 controls the movable guide rail 70 to disengage from the guide rail 101 in the furnace, making room for the furnace mouth blocking mechanism 2 to block the furnace mouth.

[0044] Further, such as Fig. 9 , Fig.10As shown, the transverse driving mechanism 6 includes a matching frame 60, which is slidably installed between the matching frame 60 and the movable guide rail 70, and two groups of matching frames 60 are continuously arranged, and a connecting plate 62 is arranged between the two groups of matching frames 60, and a walking motor 61 is arranged on the connecting plate 62, and a mounting plate 63 is fixedly connected to the bottom of the connecting plate 62, and the mounting plate 63 is fixedly connected to the connecting plate 62, and contact wheels 64 are rotatably installed at both ends of the mounting plate 63, and the contact wheel 64 contacts the side of the movable guide rail 70, and a gear 1 65 and a gear 2 66 are arranged at the bottom of the mounting plate 63, and the gear 1 65 and the gear 2 66 are meshed with each other, and the gear 1 65 is connected to the walking motor 61, and the gear 1 65 and the gear 2 66 are respectively coaxially connected with a driving pulley 67, and the contact wheel 64 is coaxially installed with a driven pulley 69, and a transmission belt 68 is arranged between the contact wheel 64 and the driven pulley 69.

[0045] Specifically, the matching frame 60 drives the gear 1 65 and the gear 2 66 to mesh and transmit through the travel motor 61, and transmits power to the contact wheel 64 in combination with the driving pulley 67 and the driven pulley 69. Since the contact wheel 64 is tightly installed between the movable guide rails 70, when the contact wheel 64 rotates, it will drive the matching frame 60 as a whole to move laterally along the movable guide rails 70, thereby carrying the locking drive assembly 4 and the extraction mechanism 5 close to the furnace mouth to perform material loading and unloading and furnace mouth opening and closing operations.

[0046] It should be noted that the transmission belt 68 needs to be a chain-type transmission belt 68 to ensure reliable transmission of power of the transmission belt 68 in a high-temperature working environment.

[0047] Further, such as Figure 4 As shown, the furnace mouth blocking mechanism 2 includes a symmetrically fixedly installed connecting angle iron 20, on which a rotating motor 21 is arranged, and the output shaft of the rotating motor 21 is connected to a semicircular frame 22, in which a semicircular blocking disk 23 is arranged, and a connecting angle iron 24 is arranged on the semicircular frame 22, and a rotating motor 25 is arranged on the connecting angle iron 24, and the output shaft of the rotating motor 25 is connected to a semicircular frame 26, in which a semicircular blocking disk 27 is arranged, and the locking mechanism 3 cooperates with the semicircular blocking disk 27.

[0048] Specifically, when the sintering table 103 carries the sintered body into the furnace body 1, the guide rail driving assembly 7 controls the moving guide rail 70 to leave the furnace mouth. At this time, the semicircular frame 22 and the semicircular sealing disk 23 are driven to close by the rotating motor 21, and the semicircular frame 26 and the semicircular sealing disk 27 are driven to close by the rotating motor 25, so as to limit the position of the sealing disk 12 and to provide heat insulation. Finally, the semicircular sealing disk 27 is closed by the locking mechanism 3 to realize the locking control of the furnace mouth, thereby ensuring the normal operation of the atmosphere control system 8 in the subsequent furnace body 1.

[0049] Further, such as Figure 5 As shown, the locking mechanism 3 includes a docking plate 30 arranged between the semicircular sealing plate 27, the inner ring of the semicircular sealing plate 27 is provided with a positioning groove 29, and the outer ring of the docking plate 30 is provided with a positioning protrusion 31 at the position corresponding to the positioning groove 29, and a rotating plate 32 is rotatably installed at the center of the docking plate 30, and a plurality of push-pull rods 33 are evenly rotatably installed in the rotating plate 32, and a plurality of locking rods 34 are plugged into the corresponding push-pull rods 33 on the docking plate 30, and the push-pull rods 33 are rotatably installed between the locking rods 34, and a plug-in hole 28 is provided at the position corresponding to the locking rod 34 in the semicircular sealing plate 27, and the locking rod 34 cooperates with the plug-in hole 28, and a plug-in shaft 35 is plugged into the center of the rotating plate 32, and the plug-in shaft 35 is connected to the locking drive assembly 4.

[0050] Specifically, the locking drive assembly 4 drives the plug-in shaft 35 to rotate, thereby controlling the rotating disk 32 to rotate. The rotating disk 32 synchronously controls the push-pull rod 33 to rotate, thereby driving the locking rod 34 to extend and retract. When the locking rod 34 is extended and inserted into the plug-in hole 28, the locking control between the docking disk 30 and the semicircular sealing disk 27 is completed; otherwise, the docking disk 30 and the semicircular sealing disk 27 will be unlocked.

[0051] Further, such as Fig. 9 As shown, the locking drive assembly 4 also includes a slide rod 44 connected to a step frame 43, the slide rod 44 is plugged into the end of the cross 42, a clamping groove 46 is provided on the upper side of the step frame 43, the clamping groove 46 is slidably engaged with the upper edge of the cross 42, a mounting disc 47 is provided at the end of the step frame 43, the mounting disc 47 is fixedly connected to the docking disc 30 through evenly arranged connecting columns 49, a rotating motor 48 is provided on the mounting disc 47, and the rotating motor 48 is dynamically connected to the plug-in shaft 35.

[0052] Specifically, driven by the transverse drive mechanism 6, the locking drive assembly 4 and the locking mechanism 3 are brought close to the furnace mouth blocking mechanism 2. The step frame 43 is controlled by the telescopic cylinder 45 to move slightly, thereby driving the locking mechanism 3 to move in and out of the semicircular blocking disk 27 to perform locking or unlocking operations. After completing the locking operation, the locking drive assembly 4 will stay at the end of the furnace mouth until the furnace body 1 is opened after sintering is completed and the lock is released and separated from the furnace body 1.

[0053] After sintering is completed, when the sintering table 103 needs to be taken out, first control the locking drive assembly 4 to release the lock between the locking mechanism 3 and the furnace mouth sealing mechanism 2, and combine with the transverse driving mechanism 6 on the side away from the port of the furnace body 1 to separate the locking mechanism 3 from the furnace mouth sealing mechanism 2, then open the furnace mouth sealing mechanism 2, and then use the adsorption frame 53 and the docking block 54 to dock the sealing disc 12, finally, combine the transverse driving mechanism 6 and the rotation motor 41 to rotate the locking mechanism 3 and the sealing disc 12 ninety degrees, so as to facilitate another set of transverse driving mechanisms 6 combined with the push-pull assembly to grab and transfer the sintering table 103 in the furnace body 1, and realize the rapid loading and unloading operation of the sintered body.

[0054] Further, such as Fig. 9 As shown, a slide rod 2 50 is provided on the step frame 2 52, and the slide rod 2 50 is plugged into the end of the cross 42. A magnetic hole 120 is provided at the position of the sealing disc 12 corresponding to the docking block 54. The docking block 54 and the magnetic hole 120 cooperate with each other. The sealing disc 12 is installed in cooperation with the end of the furnace mouth through a refractory ring 11 and a fixing ring 10.

[0055] Further, such as Fig.12 As shown, the furnace body 1 is provided with an atmosphere control system 8, and the atmosphere control system 8 includes an air duct 80 arranged on the top of the furnace body 1, the air duct 80 is connected with a connecting pipe 81, the connecting pipe 81 is provided with an opening and closing valve and a pressure gauge 82, and the end of the connecting pipe 81 is provided with a joint 1 83 and a joint 2 84 which are continuously arranged, the joint 1 83 is connected to an inert gas tank, the joint 2 84 is connected to a vacuum machine, and the connecting pipe 81 is symmetrically arranged on the top of the furnace body 1.

[0056] Specifically, in the degreasing stage, in order to prevent the sintered body from being oxidized, the furnace body 1 needs to be vacuumed first, and then degreasing is performed after the vacuum treatment, and the gaseous substances produced after degreasing decomposition are extracted, and then an inert gas such as argon is injected into the furnace body 1 to start the temperature increase sintering process.

[0057] Further, such as Fig. 9 , Fig.12As shown, the push-pull assembly includes a telescopic cylinder 3 55, the telescopic cylinder 3 55 is connected to an extension rod 56, the extension rod 56 is connected to an adsorption block 57, and sliding frames 102 are provided at both ends of the sintering table 103. The sintering table 103 is slidably installed between the sliding frames 102 and the guide rails 101 in the furnace, and the adsorption block 57 and the sliding frame 102 on the side of the sintering table 103 facing the furnace mouth are adsorbed on each other.

[0058] The present invention also discloses a working method of the cemented carbide degreasing sintering furnace as described above, comprising the following steps: S1, feeding, driving the moving guide rail 70 to dock with the furnace guide rail 101 in the furnace body 1 through the guide rail driving assembly 7, combining with the transverse driving mechanism 6 and the push-pull assembly to drive the sintering table 103 and the sintered body on the sintering table 103 into the furnace guide rail 101 inside the furnace body 1, and then controlling the push-pull assembly to withdraw from the furnace body 1; S2, closing the furnace body 1, docking the blocking disc 12 with the refractory ring 11 at the end of the furnace body 1 through the adsorption rack 53 and the docking block 54 in the extraction mechanism 5, and then combining with the furnace mouth blocking mechanism 2 to make the semicircular blocking disc 1 23 and the semicircular blocking disc 2 27 rotate and close, forming a limit for the blocking disc 12, and then combining with the locking mechanism Structure 3 locks the state of the semicircular sealing disk 27; S3, sintering, first vacuum the furnace body 1 through the atmosphere control system 8, first heat up the sintered body for degreasing, and after the degreasing is completed, extract the gas produced by the degreasing decomposition, and finally introduce inert gas argon into the furnace body 1, and heat up the furnace for sintering; S4, discharging, after the sintering is completed, release the lock of the semicircular sealing disk 27 through the locking drive component 4 and the locking mechanism 3, and open the furnace body 1 in combination with the furnace mouth sealing mechanism 2, and finally drive the extraction mechanism 5 to open the sealing disk 12 through the transverse driving mechanism 6, and take out the sintering table 103 in combination with the push-pull component, and transfer it to the movable guide rail 70.

[0059] The working principle of the embodiment of the present invention is: like Figure 1-Figure 12As shown, the movable step frame 2 52 drives the adsorption frame 53 to approach the blocking disc 12, and cooperates with the magnetic absorption hole 120 on the blocking disc 12 to adsorb, so as to grasp the blocking disc 12, control the blocking disc 12 to cooperate or disengage with the end of the furnace mouth, and assist in feeding or discharging. When the sintering table 103 is driven, the lateral driving mechanism 6 carries the telescopic cylinder 3 55 and the adsorption block 57 to contact and adsorb with the end of the sliding frame 102, thereby driving the sintering table 103 between the sliding frames 102 to move back and forth on the guide rail 101 in the furnace and the moving guide rail 70, so as to realize the feeding and discharging before and after sintering. Before feeding, the furnace mouth blocking mechanism 2 is opened, and the driving motor 76 in the guide rail driving assembly 7 drives the movable guide rail 70 to move horizontally, and finally contacts the end of the guide rail 101 in the furnace, and then drives the sliding frame 102 and the sintering table 103 from the movable guide rail 70 to the guide rail 101 in the furnace through the horizontal driving mechanism 6. Then the guide rail driving assembly 7 controls the movable guide rail 70 to disengage from the guide rail 101 in the furnace, making space for the furnace mouth blocking mechanism 2 to block the furnace mouth. The matching frame 60 drives the gear 1 65 and the gear 2 66 to mesh and drive through the travel motor 61, and transmits the power to the contact wheel 64 in combination with the driving pulley 67 and the driven pulley 69. Since the contact wheel 64 is tightly installed between the movable guide rails 70, when the contact wheel 64 rotates, it will drive the matching frame 60 as a whole to move horizontally along the movable guide rail 70, thereby carrying the locking drive assembly 4 and the extraction mechanism 5 close to the furnace mouth to perform feeding and unloading and furnace mouth opening and closing operations. When the sintering table 103 carries the sintered body into the furnace body 1, the guide rail driving assembly 7 controls the moving guide rail 70 to leave the furnace mouth. At this time, the semicircular frame 1 22 and the semicircular blocking disk 1 23 are driven to close by the rotating motor 1 21, and the semicircular frame 2 26 and the semicircular blocking disk 2 27 are driven to close by the rotating motor 2 25, so as to limit the blocking disk 12 and to provide heat insulation treatment. Finally, the semicircular blocking disk 2 27 is closed by the locking mechanism 3 to achieve the locking control of the furnace mouth and ensure the normal operation of the atmosphere control system 8 in the subsequent furnace body 1. The locking driving assembly 4 drives the plug-in shaft 35 to rotate, thereby controlling the rotating disk 32 to rotate. The rotating disk 32 synchronously controls the push-pull rod 33 to rotate, thereby driving the locking rod 34 to extend and retract. When the locking rod 34 is extended and inserted into the plug hole 28, the locking control between the docking disk 30 and the semicircular blocking disk 2 27 is completed; otherwise, the docking disk 30 and the semicircular blocking disk 2 27 will be released from the lock. Driven by the transverse drive mechanism 6, the locking drive assembly 4 and the locking mechanism 3 are brought close to the furnace mouth blocking mechanism 2. The step frame 43 is controlled by the telescopic cylinder 45 to move slightly, thereby driving the locking mechanism 3 to move in and out between the semicircular blocking disk 27 to perform locking or unlocking operations. After the locking operation is completed, the locking drive assembly 4 will stay at the end of the furnace mouth until the furnace body 1 is opened after sintering is completed and the lock is released and separated from the furnace body 1.In the degreasing stage, in order to prevent the sintered body from being oxidized, the furnace body 1 must first be vacuumed, and then degreasing is performed, and the gaseous substances produced after degreasing decomposition are extracted, and an inert gas such as argon is injected into the furnace body 1 to perform a temperature-raising sintering treatment. After sintering is completed, the material is discharged and the material is repeatedly fed when the temperature in the furnace body 1 does not drop significantly, thereby improving the sintering efficiency and effectively reducing energy consumption.

[0060] Before the furnace body 1 works, the sintering table 103 is combined with the sliding frame 102 to be located on the movable guide rail 70, and the sintered body is placed on the sintering table 103, and the port of the furnace body 1 is in an open state. At this time, the movable guide rail 70 is controlled by the guide rail driving component 7 to dock with the guide rail 101 in the furnace, and the lateral driving mechanism 6 close to the port of the furnace body 1 is combined with the push-pull component to push the sintering table 103 onto the guide rail 101 in the furnace, and the lateral driving mechanism 6 and the extraction mechanism 5 are combined to seal the sealing disc 12 and the port of the furnace body 1, and then the end of the furnace body 1 is closed by the furnace mouth sealing mechanism 2, and the locking mechanism 3 and the locking driving component 4 are continued to be combined with the lateral driving mechanism 6 to complete the locking operation of the port of the furnace body 1. When the port of furnace body 1 is locked, the temperature inside furnace body 1 is first controlled to make the binder (such as paraffin) gradually decompose and volatilize at a lower temperature, thereby completing the degreasing and entering the sintering stage. At this time, the temperature inside furnace body 1 is controlled to rise to 1300-1500 degrees Celsius or higher. At high temperature, diffusion and fusion occur between cemented carbide powder particles, making the powder dense and completing the sintering operation.

[0061] After sintering is completed, first control the locking drive assembly 4 to release the lock between the locking mechanism 3 and the furnace mouth sealing mechanism 2, and combine with the transverse driving mechanism 6 on the side away from the port of the furnace body 1 to separate the locking mechanism 3 from the furnace mouth sealing mechanism 2, then open the furnace mouth sealing mechanism 2, and then use the adsorption frame 53 and the docking block 54 to dock the sealing disc 12, finally combine the transverse driving mechanism 6 and the rotation motor 41 to rotate the locking mechanism 3 and the sealing disc 12 ninety degrees, so as to facilitate another set of transverse driving mechanisms 6 combined with the push-pull assembly to grab and transfer the sintering table 103 in the furnace body 1, and realize the rapid loading and unloading operation of the sintered body.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. Any reference numeral in a claim shall not be regarded as limiting the claim involved.

[0063] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A cemented carbide degreasing sintering furnace, comprising a furnace body (1) and a heating coil (100), wherein two sets of furnace guide rails (101) are arranged in the furnace body (1), and a sintering table (103) is installed between the furnace guide rails (101), characterized in that: The port of the furnace body (1) is provided with a blocking disc (12), a furnace mouth blocking mechanism (2) is provided between the blocking disc (12) and the furnace body (1), a guide rail driving assembly (7) is provided outside the port of the furnace body (1), and the guide rail driving assembly (7) comprises a movable guide rail (70) that is butted against a guide rail (101) in the furnace; Two groups of transverse drive mechanisms (6) are movably mounted on the movable guide rail (70), wherein one group of the transverse drive mechanisms (6) is connected to a locking drive assembly (4) and an extracting mechanism (5), and the group of the transverse drive mechanisms (6) carries the locking drive assembly (4) and the locking mechanism (3) to dock with the blocking disc (12); the other group of the transverse drive mechanisms (6) is connected to a push-pull assembly, and the group of the transverse drive mechanisms (6) in combination with the push-pull assembly drives the sintering table (103) to move between the guide rail (101) in the furnace and the movable guide rail (70); The locking drive assembly (4) comprises a vertical column (40) connected to the lateral driving mechanism (6), the vertical column (40) being connected in sequence to a transfer motor (41) and a cross (42), the upper end of the cross (42) being connected in sequence to a telescopic cylinder 1 (45), a step frame 1 (43) and a locking mechanism (3); the extraction mechanism (5) is connected to the lower end of the cross (42), the extraction mechanism (5) comprising a telescopic cylinder 2 (51), a step frame 2 (52), an adsorption frame (53) and a docking block (54), the docking block (54) cooperating with the blocking disc (12).

2. A cemented carbide degreasing sintering furnace according to claim 1, characterized in that: The guide rail driving assembly (7) comprises a plurality of groups of mounting columns (77) which are distributed and fixedly installed. A transverse mounting frame (71) is fixedly connected between the mounting columns (77). The movable guide rail (70) is slidably installed on the top of the mounting column (77). The movable guide rail (70) is symmetrically arranged on both sides of the transverse mounting frame (71). A connecting frame (72) is arranged between the movable guide rails (70). A mounting frame (73) is arranged at the bottom of the connecting frame (72). A matching gear (74) is rotatably installed on the mounting frame (73). The matching gear (74) is connected to a driving motor (76). A rack (75) is arranged on the transverse mounting frame (71). The matching gear (74) and the rack (75) are meshed with each other. Driven by the driving motor (76), the movable guide rail (70) is butted against the end of the guide rail (101) in the furnace.

3. A cemented carbide degreasing sintering furnace according to claim 2, characterized in that: The transverse driving mechanism (6) comprises a matching frame (60), the matching frame (60) being slidably mounted on the movable guide rail (70), two groups of matching frames (60) being continuously arranged, a connecting plate (62) being arranged between the two groups of matching frames (60), a travel motor (61) being arranged on the connecting plate (62), a mounting plate (63) being fixedly connected to the bottom of the connecting plate (62), the mounting plate (63) being fixedly connected to the connecting plate (62), contact wheels (64) being rotatably mounted on both ends of the mounting plate (63), and the connecting plate (63) being rotatably mounted on the two ends of the mounting plate (63). The contact wheel (64) contacts the side of the movable guide rail (70), and a gear 1 (65) and a gear 2 (66) are provided at the bottom of the mounting plate (63). The gear 1 (65) and the gear 2 (66) are meshed with each other. The gear 1 (65) is connected to the travel motor (61), and the gear 1 (65) and the gear 2 (66) are coaxially connected to a driving pulley (67) respectively. The contact wheel (64) is coaxially mounted with a driven pulley (69), and a transmission belt (68) is provided between the contact wheel (64) and the driven pulley (69).

4. A cemented carbide degreasing sintering furnace according to claim 3, characterized in that: The furnace mouth blocking mechanism (2) comprises a symmetrically fixedly mounted connecting angle iron (20), a rotating motor (21) being arranged on the connecting angle iron (20), an output shaft of the rotating motor (21) being connected to a semicircular frame (22), a semicircular blocking disk (23) being arranged in the semicircular frame (22), a connecting angle iron (24) being arranged on the semicircular frame (22), a rotating motor (25) being arranged on the connecting angle iron (24), an output shaft of the rotating motor (25) being connected to a semicircular frame (26), a semicircular blocking disk (27) being arranged in the semicircular frame (26), and the locking mechanism (3) and the semicircular blocking disk (27) being coordinated with each other.

5. A cemented carbide degreasing sintering furnace according to claim 4, characterized in that: The locking mechanism (3) comprises a docking disk (30) arranged between the second semicircular blocking disk (27); the inner ring of the second semicircular blocking disk (27) is provided with a positioning groove (29); the outer ring of the docking disk (30) is provided with a positioning protrusion (31) at a position corresponding to the positioning groove (29); a rotating disk (32) is rotatably mounted at the center of the docking disk (30); a plurality of push-pull rods (33) are evenly rotatably mounted in the rotating disk (32); a plurality of locking rods (34) are plugged into the docking disk (30) corresponding to the push-pull rods (33); the push-pull rods (33) and the locking rods (34) are rotatably mounted therebetween; a plug-in hole (28) is provided at a position corresponding to the locking rod (34) in the second semicircular blocking disk (27); the locking rod (34) and the plug-in hole (28) cooperate with each other; a plug-in shaft (35) is plugged into the center of the rotating disk (32); and the plug-in shaft (35) is connected to the locking drive assembly (4).

6. A cemented carbide degreasing sintering furnace according to claim 5, characterized in that: The locking drive assembly (4) further comprises a slide bar (44) connected to the step frame (43), the slide bar (44) being plugged into the end of the cross (42), a clamping groove (46) being arranged on the upper side of the step frame (43), the clamping groove (46) being slidably engaged with the upper edge of the cross (42), a mounting disc (47) being arranged at the end of the step frame (43), the mounting disc (47) being fixedly connected to the docking disc (30) via evenly arranged connecting columns (49), a rotating motor (48) being arranged on the mounting disc (47), and a power connection being provided between the rotating motor (48) and the plug-in shaft (35).

7. A cemented carbide degreasing sintering furnace according to claim 6, characterized in that: The second step frame (52) is provided with a second slide bar (50), and the second slide bar (50) is plugged into the end of the cross (42). The portion of the sealing disc (12) corresponding to the docking block (54) is provided with a magnetic hole (120), and the docking block (54) and the magnetic hole (120) cooperate with each other. The sealing disc (12) is installed in cooperation with the end of the furnace mouth through a refractory ring (11) and a fixing ring (10).

8. The cemented carbide degreasing sintering furnace according to claim 7, characterized in that: The furnace body (1) is provided with an atmosphere control system (8), the atmosphere control system (8) comprising an air guide pipe (80) arranged at the top of the furnace body (1), the air guide pipe (80) being connected to a connecting pipe (81), the connecting pipe (81) being provided with an opening and closing valve and a pressure gauge (82), the end of the connecting pipe (81) being provided with a first joint (83) and a second joint (84) being continuously arranged, the first joint (83) being connected to an inert gas tank, the second joint (84) being connected to a vacuum machine, and the connecting pipe (81) being symmetrically arranged at the top of the furnace body (1).

9. A cemented carbide degreasing sintering furnace according to claim 8, characterized in that: The push-pull assembly comprises a telescopic cylinder three (55), the telescopic cylinder three (55) is connected to an extension rod (56), the extension rod (56) is connected to an adsorption block (57), and sliding frames (102) are arranged at both ends of the sintering table (103). The sintering table (103) is slidably installed between the sliding frames (102) and the guide rails (101) in the furnace, and the adsorption block (57) and the sliding frame (102) on the side of the sintering table (103) facing the furnace mouth are adsorbed on each other.

10. A method for operating a cemented carbide degreasing sintering furnace as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1, feeding, driving the movable guide rail (70) to dock with the furnace guide rail (101) in the furnace body (1) through the guide rail driving assembly (7), combining with the transverse driving mechanism (6) and the push-pull assembly to drive the sintering table (103) and the sintered body on the sintering table (103) into the furnace guide rail (101) inside the furnace body (1), and then controlling the push-pull assembly to withdraw from the furnace body (1); S2, closing the furnace body (1), docking the sealing disc (12) with the refractory ring (11) at the end of the furnace body (1) through the adsorption frame (53) and the docking block (54) in the extraction mechanism (5), and then combining with the furnace mouth blocking mechanism (2) to make the semicircular blocking disc 1 (23) and the semicircular blocking disc 2 (27) rotate and close, forming a limit for the sealing disc (12), and then combining with the locking mechanism (3) to lock the state of the semicircular blocking disc 2 (27); S3, sintering, firstly vacuuming the furnace body (1) through the atmosphere control system (8), firstly raising the temperature to degrease the sintered body, extracting the gas generated by decomposition after the degreasing, and finally introducing inert gas argon into the furnace body (1), and raising the temperature in the furnace to sinter; S4, discharging the material. After sintering is completed, the locking drive assembly (4) and the locking mechanism (3) are used to release the lock on the semicircular blocking disk 2 (27), and the furnace body (1) is opened in conjunction with the furnace mouth blocking mechanism (2). Finally, the extraction mechanism (5) is driven by the transverse driving mechanism (6) to open the blocking disk (12), and the sintering table (103) is taken out in conjunction with the push-pull assembly and transferred to the movable guide rail (70).

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