Sintering furnace suitable for hard alloy processing

Abstract

The invention discloses a sintering furnace suitable for hard alloy machining, and belongs to the technical field of sintering furnaces. The hard alloy sintering furnace comprises a sintering furnace body, and a heating mechanism used for melting hard alloy and a slag removing mechanism assisting in melting the hard alloy are arranged in the sintering furnace body; the heating mechanism comprises a sleeve, a crucible is arranged in the sleeve, and the periphery of the crucible is sleeved with a smelting coil used for heating the crucible. The slag removal mechanism comprises a slag removal straight barrel, a slag removal rod is rotationally installed in the slag removal straight barrel, a material smashing end is arranged at the end of the slag removal rod, a sliding groove is formed in the material smashing end, and a moving rod is installed in the sliding groove in a sliding mode; the slag removal mechanism is matched with the casting mold mechanism, melting and separation of hard alloy are accelerated, slag in the crucible is removed, the casting mold mechanism is used for casting and transferring the molten alloy, the sintering process is continuously carried out, repeated vacuum breaking operation does not need to be carried out on the sintering furnace, and the machining efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of sintering furnaces, and more particularly to a sintering furnace suitable for hard alloy processing. Background Art

[0002] Cemented carbide (usually an alloy material composed of tungsten, cobalt, carbon and other elements) needs to be sintered at high temperature during the production process to obtain the required density, hardness and wear resistance. Cemented carbide is usually sintered in a vacuum sintering furnace, especially when it is necessary to control the atmosphere, avoid oxidation and reduce impurities. By sintering in a vacuum environment, the high density, uniformity and surface quality of the cemented carbide can be ensured, which is particularly suitable for the sintering of cemented carbide with very high material quality requirements.

[0003] The utility model with publication number CN202955965U discloses a magnetic steel vacuum tube sintering furnace, which comprises a sintering furnace tube, wherein the sintering furnace tube has a cavity for accommodating materials to be sintered, and the sintering furnace tube has a heating mechanism, which sinters the materials in the cavity, and the sintering furnace tube is connected to an exhaust system, which performs vacuum treatment on the inside of the sintering furnace tube, and the heating mechanism and the exhaust system are connected to a control box, which regulates the heating and vacuuming processes; the sintering furnace is connected to a feed pipe at the entrance of the sintering furnace tube, and the materials are transported to the sintering furnace tube through the feed pipe, so that the materials have time to be preheated before entering the sintering furnace tube, and at the same time, the exhaust system is arranged at the entrance of the feed pipe, so that the feed pipe and the sintering furnace tube are both in a vacuum state, thereby achieving the purpose of purifying the materials in advance, but when processing cemented carbide, slag will be generated on the surface of the molten technology due to impurities and additives in the cemented carbide, and the slag hinders heat transfer and gas escape, affecting the sintering process. Summary of the invention

[0004] In view of the shortcomings of the prior art, the object of the present invention is to provide a sintering furnace suitable for cemented carbide processing.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A sintering furnace suitable for hard alloy processing, comprising:

[0007] A sintering furnace body, wherein a heating mechanism for melting the cemented carbide and a slag cleaning mechanism for assisting in melting the cemented carbide are arranged in the sintering furnace body;

[0008] The heating mechanism comprises a sleeve, a crucible is arranged in the sleeve, and a smelting coil for heating the crucible is sleeved on the periphery of the crucible; the slag cleaning mechanism comprises a slag cleaning straight cylinder, a slag cleaning rod is rotatably installed in the slag cleaning straight cylinder, a pounding end head is arranged at the end of the slag cleaning rod, a sliding groove is provided in the pounding end head, a moving rod is slidably installed in the sliding groove, pounding blades are connected to both sides of the moving rod, a slag scraping plate is arranged at the bottom of the moving rod, and a cylinder is also arranged in the sliding groove, and the piston rod of the cylinder is fixedly connected to the end of the moving rod;

[0009] The charging chamber is located on the top of the sintering furnace body and is used for rapid charging of the sintering furnace.

[0010] A casting chamber, which is arranged at the bottom of the sintering furnace body, and a casting mechanism is arranged in the casting chamber, and the casting mechanism is used for molding and transferring cemented carbide;

[0011] The casting mechanism includes a rotating base, on which a casting cavity and a slag receiving cavity are arranged. The casting cavity is used to hold the molten cemented carbide and cast the mold, and the slag receiving cavity is used to hold the slag produced by the melting of the cemented carbide. The rotating base is rotatably installed on a fixed base, and a rotating motor is arranged in the fixed base to drive the rotating base to rotate. A lifting rod is arranged at the bottom of the fixed base, and a driving hydraulic cylinder is arranged at the bottom of the casting chamber, and the piston rod of the driving hydraulic cylinder is connected to the lifting rod.

[0012] As a further solution of the present invention, an opening is provided on one side of the slag cleaning straight cylinder, a driven gear is sleeved on the slag cleaning rod, the driven gear is meshed and connected with the driving gear, the driving gear is rotatably installed in a matching box, and a driving motor is provided on the matching box to drive the driving gear to rotate.

[0013] As a further solution of the present invention, the tamping end head slides on a connecting seat, an electric push rod for driving the tamping end head to move is arranged in the connecting seat, and the connecting seat is installed at the bottom end of the slag cleaning rod.

[0014] As a further solution of the present invention, the matching box is installed on one side of the slag cleaning straight cylinder, the slag cleaning rod passes through the top of the sintering furnace body and extends into the interior of the sintering furnace body, the slag cleaning straight cylinder is installed on the cover body, and the cover body is installed on the sintering furnace body.

[0015] As a further solution of the present invention, the sleeve is rotatably mounted on a mounting frame, and a rotating motor for driving the sleeve to rotate is disposed in the mounting frame.

[0016] As a further solution of the present invention, a partition is provided on the top of the casting chamber, and the partition is connected to the bottom of the sintering furnace body. An isolation port for the rotating base to pass through is opened on the partition. Vacuum isolation valve plates are provided on both sides of the partition. The two vacuum isolation valve plates are slidably installed between two positioning frames. The two positioning frames are installed in the partition. A driving push rod for driving the vacuum isolation valve plate to move is also provided on the partition.

[0017] As a further solution of the present invention, the casting cavity and the slag receiving cavity are installed on the rotating base through columns, and the casting cavity and the slag receiving cavity are detachable from the columns.

[0018] As a further solution of the present invention, a vacuum pipe three is arranged on the sintering furnace body, a vacuum pipe one is arranged on one side of the feeding chamber, a vacuum pipe two is arranged on one side of the casting chamber, and the vacuum pipe one, vacuum pipe two and vacuum pipe three are all connected to the vacuum unit.

[0019] Compared with the existing solutions, the present invention has the following beneficial effects:

[0020] The present invention uses a slag cleaning mechanism in conjunction with a casting mechanism to accelerate the melting of cemented carbide, separate and remove the slag in the crucible, and uses the casting mechanism to cast and transfer the molten alloy, thereby realizing a continuous sintering process without having to perform multiple air-breaking operations on the sintering furnace, thereby improving processing efficiency.

[0021] By setting up a slag cleaning mechanism, the retractable slag plate and pounding blades on the slag cleaning mechanism can stir the liquid phase or semi-liquid phase in the crucible according to different working modes, promote material homogenization to ensure the density and uniformity of the material, and at the same time, remove the slag on the surface of the crucible to prevent the slag from covering the surface of the crucible, hindering heat transfer and gas escape, and affecting the sintering process;

[0022] By setting up a casting mechanism, the casting cavity and the slag receiving cavity on the casting mechanism can carry the slag and the molten alloy in the crucible respectively, solving the problem that the slag and the molten alloy in the crucible are mixed and difficult to separate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The present invention is a schematic structural diagram of a sintering furnace suitable for cemented carbide processing.

[0024] Figure 2 It is a cross-sectional view of the sintering furnace body in the present invention.

[0025] Figure 3 It is a schematic structural diagram of the casting chamber in the present invention.

[0026] Figure 4 It is a structural schematic diagram of the slag cleaning mechanism in the present invention.

[0027] Figure 5 for Figure 4 A is an enlarged view of the middle image.

[0028] In the figure: 1, sintering furnace body; 2, heating mechanism; 21, sleeve; 22, crucible; 23, smelting coil; 24, mounting frame; 3, slag cleaning mechanism; 31, slag cleaning straight cylinder; 32, slag cleaning rod; 33, opening; 34, driven gear; 35, driving gear; 36, driving motor; 37, ramming end; 38, sliding groove; 39, moving rod; 391, ramming blade; 392, slag removal plate; 393, cylinder; 394, connecting seat; 395 , cover body; 4, vacuum pipe three; 5, feeding chamber; 6, casting chamber; 7, door panel; 8, vacuum pipe two; 9, casting mechanism; 91, rotating base; 92, casting cavity; 93, slag receiving cavity; 94, column; 95, fixed base; 96, lifting rod; 97, driving hydraulic cylinder; 10, vacuum pipe one; 11, temperature sensor; 12, partition; 13, isolation port; 14, vacuum isolation valve plate; 15, positioning frame; 16, driving push rod. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0030] Example 1

[0031] Reference Figure 1-Figure 5 As shown, the present invention is a sintering furnace suitable for cemented carbide processing, comprising a sintering furnace body 1, in which a heating mechanism 2 for heating cemented carbide and a slag cleaning mechanism 3 for assisting melting of cemented carbide are arranged; a vacuum pipe 3 4 is arranged on the sintering furnace body 1, and the vacuum pipe 3 4 is connected to a vacuum unit;

[0032] A charging chamber 5 is provided at the top of the sintering furnace body 1, and the charging chamber 5 is used for the rapid charging operation of the sintering furnace; a casting chamber 6 is provided at the bottom of the sintering furnace body 1, a door panel 7 is provided on one side of the casting chamber 6, and a vacuum pipe 8 is also provided on one side of the casting chamber 6, and the vacuum pipe 8 is connected to the vacuum unit. A casting mechanism 9 is provided in the casting chamber 6, and the casting mechanism 9 is used for the molding and transfer of cemented carbide;

[0033] The feeding chamber 5 is connected to the sintering furnace body 1, a vacuum pipe 10 is arranged on one side of the feeding chamber 5, the vacuum pipe 10 is connected to the vacuum unit, and a temperature sensor 11 for detecting the temperature in the sintering furnace body 1 is arranged in the feeding chamber 5;

[0034] The casting mechanism 9 includes a rotating base 91, on which a casting cavity 92 and a slag receiving cavity 93 are arranged. The casting cavity 92 is used to hold the molten cemented carbide and cast the mold, and the slag receiving cavity 93 is used to hold the slag generated by the melting of the cemented carbide; the casting cavity 92 and the slag receiving cavity 93 are installed on the rotating base 91 through a column 94, and the casting cavity 92 and the slag receiving cavity 93 are detachable from the column 94. The rotating base 91 is rotatably installed on a fixed base 95, and a rotating motor for driving the rotating base 91 to rotate is arranged in the fixed base 95. A lifting rod 96 is arranged at the bottom of the fixed base 95, and a driving hydraulic cylinder 97 is arranged at the bottom of the casting chamber 6, and the piston rod of the driving hydraulic cylinder 97 is connected to the lifting rod 96;

[0035] The rotating base 91 is driven to rotate on the fixed base 95 by a rotating motor, thereby driving the casting cavity 92 and the slag receiving cavity 93 on the rotating base 91 to rotate, so that the casting cavity 92 and the slag receiving cavity 93 can be moved to one side of the crucible 22 respectively, so as to receive the slag and the molten metal conveniently; the lifting rod 96 is driven to move by a driving hydraulic cylinder 97, thereby driving the rotating base 91 at the bottom to move, so that the rotating base 91 and the casting cavity 92 and the slag receiving cavity 93 can move between the sintering furnace body 1 and the casting chamber 6, so as to realize the casting and transfer of the molten metal;

[0036] The casting chamber 6 is connected to the sintering furnace body 1. A partition 12 is arranged on the top of the casting chamber 6. The partition 12 is connected to the bottom of the sintering furnace body 1. An isolation port 13 is provided on the partition 12 for the rotating base 91 to pass through. Vacuum isolation valve plates 14 are arranged on both sides of the partition 12. The two vacuum isolation valve plates 14 are slidably installed between two positioning frames 15. The two positioning frames 15 are installed in the partition 12. A driving push rod 16 for driving the vacuum isolation valve plates 14 to move is also arranged on the partition 12.

[0037] By driving the push rod 16 to move the vacuum isolation valve plate 14 and opening and closing the vacuum isolation valve plate 14, the passage between the sintering furnace body 1 and the casting chamber 6 can be opened and closed.

[0038] The heating mechanism 2 includes a sleeve 21, a crucible 22 is arranged in the sleeve 21, a smelting coil 23 for heating the crucible 22 is sleeved on the outer periphery of the crucible 22, the sleeve 21 is rotatably mounted on a mounting frame 24, a rotating motor for driving the sleeve 21 to rotate is arranged in the mounting frame 24, and the sleeve 21 is driven to rotate by the rotating motor, so that the molten cemented carbide in the crucible 22 can be transferred to the casting mechanism 9;

[0039] The slag cleaning mechanism 3 includes a slag cleaning cylinder 31, in which a slag cleaning rod 32 is rotatably installed, an opening 33 is provided on one side of the slag cleaning cylinder 31, a driven gear 34 is sleeved on the slag cleaning rod 32, the driven gear 34 is meshed and connected with a driving gear 35, the driving gear 35 is rotatably installed in a matching box, a driving motor 36 is provided on the matching box, the driving motor 36 is used to drive the driving gear 35 to rotate, a tamping end 37 is provided at the end of the slag cleaning rod 32, a sliding groove 38 is provided in the tamping end 37, a moving rod 39 is slidably installed in the sliding groove 38, tamping blades 391 are connected on both sides of the moving rod 39, a slag scraping plate 392 is provided at the bottom of the moving rod 39, a cylinder 393 is also provided in the sliding groove 38, and the piston rod of the cylinder 393 is fixedly connected to the end of the moving rod 39;

[0040] The cylinder 393 drives the moving rod 39 to slide in the sliding groove 38, so that the slag-scraping plate 392 at the bottom of the moving rod 39 moves out of the pounding end 37 and inserts into the crucible 22, and the driving motor 36 drives the driving gear 35 to rotate, and the driving gear 35 engages with the driven gear 34 to drive the slag-cleaning rod 32 to rotate in the slag-cleaning straight cylinder 31, so that the pounding blades 391 on both sides of the moving rod 39 can contact and stir the alloy in the liquid phase or semi-liquid phase;

[0041] The tamping end 37 slides on the connecting seat 394. An electric push rod is arranged in the connecting seat 394 to drive the tamping end 37 to move. The connecting seat 394 is installed at the bottom end of the slag cleaning rod 32. The electric push rod drives the tamping end 37 to move on the connecting seat 394, thereby driving the slag scraping plate 392 to move horizontally, so that the slag scraping plate 392 can scrape the slag in the crucible 22.

[0042] The matching box is installed on one side of the slag cleaning cylinder 31 , the slag cleaning rod 32 passes through the top of the sintering furnace body 1 and extends to the inside of the sintering furnace body 1 , the slag cleaning cylinder 31 is installed on the cover body 395 , and the cover body 395 is installed on the sintering furnace body 1 .

[0043] The casting chamber 6, the sintering furnace body 1 and the feeding chamber 5 are all provided with special gas pipelines for breaking the vacuum. By passing special gas through the casting chamber 6, the sintering furnace body 1 and the feeding chamber 5, the vacuum can be quickly broken.

[0044] The working principle of a sintering furnace suitable for hard alloy processing of the present invention is as follows:

[0045] Raw materials are added to the crucible 22 in the sintering furnace body 1 through the feeding chamber 5. After the feeding chamber 5 is evacuated, the raw materials fall into the crucible 22 through the bottom of the feeding chamber 5. The crucible 22 is heated by the smelting coil 23 in the sleeve 21, and the cemented carbide in the crucible 22 is further heated.

[0046] The cylinder 393 drives the moving rod 39 to slide in the sliding groove 38, so that the slag-scraping plate 392 at the bottom of the moving rod 39 moves out of the pounding end 37 and is inserted into the crucible 22. The driving motor 36 drives the driving gear 35 to rotate, and the driving gear 35 engages with the driven gear 34 to drive the slag-cleaning rod 32 to rotate in the slag-cleaning straight cylinder 31, so that the pounding blades 391 on both sides of the moving rod 39 are in contact with each other in a liquid phase or a semi-liquid phase (such as a metal melt or a molten ceramic). Stirring can promote the homogenization of the material to ensure the density and uniformity of the material.

[0047] When the cemented carbide is melted, the cylinder 393 drives the moving rod 39 to slide in the sliding groove 38, so that the slag plate 392 at the bottom of the moving rod 39 is retracted, and the sleeve 21 is driven to rotate by the rotating motor to drive the crucible 22 to tilt. At this time, the rotating base 91 is driven to rotate by the rotating motor, so that the slag receiving cavity 93 on the rotating base 91 moves to one side of the crucible 22, and the slag on the surface of the crucible 22 is scraped off by the slag plate 392 that moves laterally, and the slag is scraped onto the slag receiving cavity 93 to prevent the slag from covering the surface of the crucible 22, hindering heat transfer and gas escape, and affecting the sintering process;

[0048] After sintering is completed, the mold cavity 92 is moved to one side of the crucible 22, and the molten metal in the crucible 22 is poured into the mold cavity 92. The hydraulic cylinder 97 is used to drive the lifting rod 96 to move downward, and the mold cavity 92 and the slag cavity 93 on the rotating base 91 pass through the isolation port 13 and are retracted into the mold chamber 6. The vacuum isolation valve plate 14 is driven to move by driving the push rod 16 so that the vacuum isolation valve plate 14 closes the isolation port 13 to complete the casting and transfer of the cemented carbide. At the same time, the vacuum environment of the sintering furnace body 1 is isolated. The door panel 7 of the mold chamber 6 can be opened to take out the materials in the mold cavity 92 and the slag cavity 93.

[0049] Example 2

[0050] Reference Figure 1-Figure 5 As shown, the present invention is a sintering furnace suitable for cemented carbide processing, comprising a sintering furnace body 1, in which a heating mechanism 2 for heating cemented carbide and a slag cleaning mechanism 3 for assisting in melting the cemented carbide are arranged; a feeding chamber 5 is arranged on the top of the sintering furnace body 1, and the feeding chamber 5 is used for the rapid feeding operation of the sintering furnace; a casting chamber 6 is arranged on the bottom of the sintering furnace body 1, a door panel 7 is arranged on one side of the casting chamber 6, and a casting mechanism 9 is arranged in the casting chamber 6, and the casting mechanism 9 is used for the molding and transfer of cemented carbide.

[0051] The feeding chamber 5 is communicated with the sintering furnace body 1 , and a temperature sensor 11 for detecting the temperature in the sintering furnace body 1 is arranged in the feeding chamber 5 .

[0052] The casting mechanism 9 includes a rotating base 91, on which a casting cavity 92 and a slag receiving cavity 93 are arranged. The casting cavity 92 is used to hold the molten cemented carbide and cast the mold, and the slag receiving cavity 93 is used to hold the slag generated by the melting of the cemented carbide; the casting cavity 92 and the slag receiving cavity 93 are installed on the rotating base 91 through a column 94, and the casting cavity 92 and the slag receiving cavity 93 are detachable from the column 94. The rotating base 91 is rotatably installed on a fixed base 95, and a rotating motor for driving the rotating base 91 to rotate is arranged in the fixed base 95. A lifting rod 96 is arranged at the bottom of the fixed base 95, and a driving hydraulic cylinder 97 is arranged at the bottom of the casting chamber 6, and the piston rod of the driving hydraulic cylinder 97 is connected to the lifting rod 96;

[0053] The casting chamber 6 is connected to the sintering furnace body 1. A partition 12 is arranged on the top of the casting chamber 6. The partition 12 is connected to the bottom of the sintering furnace body 1. An isolation port 13 is opened on the partition 12 for the rotating base 91 to pass through. Vacuum isolation valve plates 14 are arranged on both sides of the partition 12. The two vacuum isolation valve plates 14 are slidably installed between two positioning frames 15. The two positioning frames 15 are installed in the partition 12. A driving push rod 16 for driving the vacuum isolation valve plate 14 to move is also arranged on the partition 12.

[0054] The heating mechanism 2 includes a sleeve 21, a crucible 22 is arranged in the sleeve 21, a smelting coil 23 for heating the crucible 22 is sleeved on the outer periphery of the crucible 22, the sleeve 21 is rotatably mounted on a mounting frame 24, a rotating motor for driving the sleeve 21 to rotate is arranged in the mounting frame 24, and the sleeve 21 is driven to rotate by the rotating motor, so that the molten cemented carbide in the crucible 22 can be transferred to the casting mechanism 9;

[0055] The slag cleaning mechanism 3 includes a slag cleaning cylinder 31, in which a slag cleaning rod 32 is rotatably installed, an opening 33 is provided on one side of the slag cleaning cylinder 31, a driven gear 34 is sleeved on the slag cleaning rod 32, the driven gear 34 is meshed and connected with a driving gear 35, the driving gear 35 is rotatably installed in a matching box, a driving motor 36 is provided on the matching box, the driving motor 36 is used to drive the driving gear 35 to rotate, a tamping end 37 is provided at the end of the slag cleaning rod 32, a sliding groove 38 is provided in the tamping end 37, a moving rod 39 is slidably installed in the sliding groove 38, tamping blades 391 are connected on both sides of the moving rod 39, a slag scraping plate 392 is provided at the bottom of the moving rod 39, a cylinder 393 is also provided in the sliding groove 38, and the piston rod of the cylinder 393 is fixedly connected to the end of the moving rod 39;

[0056] The pounding end 37 slides on the connecting seat 394, and an electric push rod is arranged in the connecting seat 394 to drive the pounding end 37 to move. The connecting seat 394 is installed at the bottom end of the slag cleaning rod 32; the matching box is installed on one side of the slag cleaning straight cylinder 31, the slag cleaning rod 32 passes through the top of the sintering furnace body 1 and extends to the inside of the sintering furnace body 1, the slag cleaning straight cylinder 31 is installed on the cover body 395, and the cover body 395 is installed on the sintering furnace body 1.

[0057] The casting chamber 6, the sintering furnace body 1 and the feeding chamber 5 are all provided with special gas pipelines for breaking the vacuum. By passing special gas through the casting chamber 6, the sintering furnace body 1 and the feeding chamber 5, the vacuum can be quickly broken.

[0058] The sintering furnace body 1 is provided with a vacuum pipe 3 4, and the vacuum pipe 3 4 is connected to the vacuum unit;

[0059] A vacuum pipe 10 is provided on one side of the feeding chamber 5, and the vacuum pipe 10 is connected to the vacuum unit;

[0060] A second vacuum pipe 8 is also provided on one side of the casting chamber 6, and the second vacuum pipe 8 is connected to the vacuum unit;

[0061] Since the feeding chamber 5 and the casting chamber 6 are chambers for loading and unloading materials, they need to be frequently evacuated and broken. Therefore, a controller is provided on the basis of Example 1 to detect and warn the vacuum degree of the sintering furnace body 1, the feeding chamber 5 and the casting chamber 6;

[0062] Sensors are arranged in the sintering furnace body 1, the charging chamber 5 and the casting chamber 6. The sensors are used to detect the vacuum degree in each chamber.

[0063] The vacuum unit connected to the vacuum pipe 1 10 and the vacuum pipe 2 8 adopts a fast pumping mode, that is, the pumping efficiency is high, and the vacuum unit connected to the vacuum pipe 3 4 adopts a slow pumping mode, that is, the pumping efficiency is low;

[0064] The controller collects the vacuum level in each chamber and compares it with the preset vacuum level threshold. When the vacuum level in a chamber exceeds the normal range, an abnormal vacuum level alarm is generated.

[0065] If the rate of change of vacuum degree in a certain area exceeds a preset threshold, a rapid drop in vacuum degree alarm is generated;

[0066] Regional vacuum warning formula Determine whether the vacuum degree of the area is abnormal, where P area is the regional vacuum warning value; P 0 △P is the vacuum degree of the sintering furnace body 1; 0 / △t is the speed of change of vacuum degree of sintering furnace body 1; P iis the vacuum degree of the feeding chamber 5 or the casting chamber 6, and α is a preset proportional coefficient; when the regional vacuum degree warning value exceeds the warning range value, it means that the vacuum degree between regions is not coordinated, and an alarm signal of vacuum degree incoordination between regions is generated.

[0067] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific direction structure and operation, and therefore, cannot be understood as a limitation on the present invention. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0068] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0069] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still be within the scope of the patent.

Claims

1. A sintering furnace suitable for cemented carbide processing, characterized in that: include: A sintering furnace body (1), wherein a heating mechanism (2) for melting hard alloy and a slag cleaning mechanism (3) for assisting in melting hard alloy are arranged in the sintering furnace body (1); The heating mechanism (2) comprises a sleeve (21), a crucible (22) is arranged in the sleeve (21), and a smelting coil (23) for heating the crucible (22) is sleeved on the outer periphery of the crucible (22); the slag cleaning mechanism (3) comprises a slag cleaning straight cylinder (31), a slag cleaning rod (32) is rotatably installed in the slag cleaning straight cylinder (31), a pounding end head (37) is arranged at the end of the slag cleaning rod (32), a sliding groove (38) is provided in the pounding end head (37), a moving rod (39) is slidably installed in the sliding groove (38), both sides of the moving rod (39) are connected to pounding blades (391), a slag scraping plate (392) is arranged at the bottom of the moving rod (39), and a cylinder (393) is also arranged in the sliding groove (38), and the piston rod of the cylinder (393) is fixedly connected to the end of the moving rod (39); A charging chamber (5) is provided on the top of the sintering furnace body (1) and is used for the rapid charging operation of the sintering furnace. A casting chamber (6), the casting chamber (6) being arranged at the bottom of the sintering furnace body (1), wherein a casting mechanism (9) is arranged in the casting chamber (6), and the casting mechanism (9) is used for molding and transferring hard alloy; The casting mechanism (9) comprises a rotating base (91), on which a casting cavity (92) and a slag receiving cavity (93) are arranged. The casting cavity (92) is used to hold the molten hard alloy and cast the mold, and the slag receiving cavity (93) is used to hold the slag generated by the melting of the hard alloy. The rotating base (91) is rotatably mounted on a fixed base (95), and a rotating motor is arranged in the fixed base (95) to drive the rotating base (91) to rotate. A lifting rod (96) is arranged at the bottom of the fixed base (95), and a driving hydraulic cylinder (97) is arranged at the bottom of the casting chamber (6), and the piston rod of the driving hydraulic cylinder (97) is connected to the lifting rod (96).

2. A sintering furnace suitable for cemented carbide processing according to claim 1, characterized in that: An opening (33) is provided on one side of the slag cleaning straight cylinder (31); a driven gear (34) is sleeved on the slag cleaning rod (32); the driven gear (34) is meshedly connected with a driving gear (35); the driving gear (35) is rotatably installed in a matching box; a driving motor (36) is provided on the matching box for driving the driving gear (35) to rotate.

3. A sintering furnace suitable for cemented carbide processing according to claim 2, characterized in that: The tamping end head (37) slides on the connecting seat (394), and an electric push rod for driving the tamping end head (37) to move is arranged in the connecting seat (394), and the connecting seat (394) is installed at the bottom end of the slag cleaning rod (32).

4. A sintering furnace suitable for cemented carbide processing according to claim 3, characterized in that: The matching box is installed on one side of the slag cleaning cylinder (31), the slag cleaning rod (32) passes through the top of the sintering furnace body (1) and extends to the inside of the sintering furnace body (1), the slag cleaning cylinder (31) is installed on the cover body (395), and the cover body (395) is installed on the sintering furnace body (1).

5. A sintering furnace suitable for cemented carbide processing according to claim 1, characterized in that: The sleeve (21) is rotatably mounted on a mounting frame (24), and a rotating motor for driving the sleeve (21) to rotate is arranged inside the mounting frame (24).

6. A sintering furnace suitable for cemented carbide processing according to claim 1, characterized in that: A partition (12) is arranged on the top of the casting chamber (6), and the partition (12) is connected to the bottom of the sintering furnace body (1). An isolation port (13) is provided on the partition (12) for the rotating base (91) to pass through. Vacuum isolation valve plates (14) are arranged on both sides of the partition (12). The two vacuum isolation valve plates (14) are slidably installed between two positioning frames (15). The two positioning frames (15) are installed in the partition (12). A driving push rod (16) for driving the vacuum isolation valve plate (14) to move is also arranged on the partition (12).

7. A sintering furnace suitable for cemented carbide processing according to claim 1, characterized in that: The casting cavity (92) and the slag receiving cavity (93) are mounted on the rotating base (91) via a column (94); the casting cavity (92) and the slag receiving cavity (93) are detachable from the column (94).

8. The sintering furnace suitable for cemented carbide processing according to claim 1, characterized in that: The sintering furnace body (1) is provided with a vacuum pipe three (4), the feeding chamber (5) is provided with a vacuum pipe one (10) on one side, and the casting chamber (6) is provided with a vacuum pipe two (8), and the vacuum pipe one (10), the vacuum pipe two (8) and the vacuum pipe three (4) are all connected to the vacuum unit.

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