A vacuum furnace high temperature sintering furnace for metal blanks

Abstract

The present invention relates to the technical field of high-temperature sintering furnaces, and specifically to a high-temperature sintering furnace for metal blank vacuum furnaces, comprising a furnace body, wherein the bottom wall of the furnace body is rotatably connected with a main shaft, and the side wall of the main shaft is fixedly connected with a placement plate; the placement plate is provided with a switching mechanism for observing the sintering state of the metal blank; the switching mechanism comprises a support plate symmetrically fixed to the bottom wall of the placement plate, and the top wall of the placement plate is symmetrically slidably connected with a push plate, each of the top walls of the push plate is fixedly connected with a mounting seat, and the bottom wall of the push plate is provided with a through hole. The present invention arranges structures such as a main shaft, a placement plate and a mounting seat, and the placement plate drives multiple mounting seats and metal blanks to rotate synchronously and slowly, thereby improving the uniformity of heating of the metal blank and ensuring the sintering time, and the heat insulation plate divides the inner cavity of the furnace body into two upper and lower areas, thereby avoiding the subsequent heat loss caused by the large amount of heat in the lower part of the furnace body cavity overflowing outward when observing the metal accessories after sintering.

Description

Technical Field

[0001] The invention relates to the technical field of high-temperature sintering furnaces, and in particular to a high-temperature sintering furnace for metal blanks in a vacuum furnace. Background Art

[0002] A vacuum sintering furnace is a furnace that performs protective sintering on heated objects in a vacuum environment. There are many heating methods, such as resistance heating, induction heating, microwave heating, etc. A vacuum sintering furnace is a furnace that uses induction heating to perform protective sintering on heated objects. It can be divided into industrial frequency, medium frequency, high frequency and other types, which can be classified as a subcategory of vacuum sintering furnaces.

[0003] After searching, the patent with announcement number CN216790816U is: a high-temperature sintering furnace for metal blanks in a vacuum furnace, including a sintering furnace, a rotating disk is fixedly installed on the inner top surface of the sintering furnace, and a rotating rod is fixedly installed on the bottom surface of the rotating disk, a storage plate is fixedly installed on the surface of the rotating rod, and a through hole is opened on the surface of the storage plate, a motor is fixedly installed on the bottom surface of the sintering furnace, and the output end of the motor is fixedly connected to the other end of the rotating rod through an insulating block, and a temperature sensor is fixedly installed on the inner wall of the sintering furnace. By setting up multiple storage plates, multiple storage plates are convenient for placing multiple metal blanks at the same time, improving the processing efficiency of metal blanks, and making it convenient for staff to take metal blanks. At the same time, the output end of the motor drives the multiple storage plates to rotate through the rotating rod, thereby driving the multiple metal blanks to rotate, so that the metal blanks are heated more evenly, and the processing effect of the metal blanks is improved. However, there are also some shortcomings, such as:

[0004] When a cylindrical metal blank is sintered, the outer wall of the cylindrical metal blank is easily sintered by heating it directly through the heater in the furnace, while the sintering speed of the inner wall of the cylindrical metal blank will be slowed down, and even incomplete sintering will occur inside. When the user takes out the metal blank to observe and detect the sintering condition, a large amount of heat will overflow and cause heat loss. Moreover, the sintering aid is not simultaneously supplemented during the sintering process of the metal blank, thereby failing to effectively improve the sintering effect and improve the product quality.

[0005] Therefore, we designed a vacuum furnace for high temperature sintering of metal blanks. Summary of the invention

[0006] The purpose of the present invention is to solve the problems existing in the prior art and to propose a vacuum furnace high temperature sintering furnace for metal blanks.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A vacuum furnace high temperature sintering furnace for metal blanks, comprising a furnace body, a main shaft rotatably connected to the bottom wall of the furnace body, and a placement plate fixedly connected to the side wall of the main shaft;

[0009] The top wall of the push plate is symmetrically fixed to the bottom wall of the placing plate, and the top wall of the placing plate is symmetrically penetrated and slidably connected with a push plate, and each of the push plate top wall is fixedly connected to a mounting seat, and the push plate bottom wall is provided with a through hole, and the inner wall of the through hole is penetrated and rotatably connected with a rotating shaft, and the side wall of the rotating shaft is fixedly connected to a convex wheel. One end of the side wall of the rotating shaft is rotatably connected to a Z-shaped plate, and the side wall of the Z-shaped plate is elastically connected to the side wall of the pushing plate by a torsion spring, and one end of the side wall of the Z-shaped plate is fixedly installed with a clamping block. Each side wall of the supporting plate is provided with a clamping groove, and the bottom wall of the placing plate is rotatably connected with a circular shaft through a vertical plate, and the side wall of the circular shaft is fixedly connected to the circular plate, and the side wall of the circular plate is fixedly connected to a wedge-shaped protrusion, and the side wall of the circular plate is fixedly connected to a limiting rod, and a heat insulation plate is fixed to the top side wall of the spindle, and a plurality of through holes are symmetrically opened on the inner wall of the heat insulation plate.

[0010] Preferably, an electric sliding door is installed on each of the through holes, the raised wheel and the side wall of the circular plate slide against each other, and the clamping block is clamped in the clamping groove.

[0011] Preferably, the end of the rotating shaft away from the torsion spring is fixedly connected to a circular plate, the side wall of the circular plate is eccentrically fixedly connected to an eccentric shaft, the side wall of the eccentric shaft is rotatably connected to one end of a connecting rod, the side wall of the push plate is fixedly connected to a box body, the inner wall of the box body is sealingly and slidably connected to a slide plate, the other end of the connecting rod is rotatably connected to the side wall of the slide plate, a plurality of nozzles are installed on the mounting seat, and a first one-way tube and a second one-way tube are fixedly connected through the inner wall of the box body.

[0012] Preferably, a circular groove is provided on the bottom wall of the main shaft, a rotating joint is fixedly installed on the bottom end of the main shaft, the end of the first one-way tube away from the box body passes through the side wall of the main shaft and is fixedly connected to the circular groove, and the end of the second one-way tube away from the box body is fixedly connected to multiple adjacent nozzles.

[0013] Preferably, a plurality of brackets are fixed to the top wall of the heat insulation board, and a transmission gear is rotatably connected to the inner wall of each bracket, a first rack is slidably connected through the inner wall of the heat insulation board, the first rack is an L-shaped structure, one end of the first rack is fixedly connected to the bottom wall of the mounting seat, a second rack is slidably connected through the inner wall of the bracket, a side wall of the second rack is fixedly connected to one end of a connecting plate, a round tube is rotatably connected through the side wall of the other end of the connecting plate, and a flamethrower is fixedly mounted on the side wall of the round tube.

[0014] Preferably, the inner wall of the furnace top is slidably connected with a plurality of vertical shafts, each of the round tubes is sleeved on the side of a vertical shaft, the side wall of the vertical shaft is fixedly connected with a guide rod, the side wall of the round tube is provided with a spiral groove, and the guide rod is slidably connected inside the spiral groove.

[0015] Preferably, the first rack is meshed and connected with the transmission gear, the second rack is meshed and connected with the transmission gear, and the first rack and the second rack are respectively arranged at two sides of the transmission gear.

[0016] Preferably, the top inner wall of the furnace body is fixedly connected with a first conical wheel via a plurality of support piles, one end of each of the circular shafts is fixedly connected with a second conical wheel, and the first conical wheel and the second conical wheel are meshingly connected.

[0017] Preferably, a driving motor is fixedly connected to the bottom wall of the furnace body, a first gear is fixedly connected to the output end of the driving motor, a second gear is fixedly connected to the bottom side wall of the main shaft, and the second gear is meshingly connected to the first gear.

[0018] Preferably, a glass furnace door is provided on the top wall of the furnace body, and a plurality of heaters are installed on the inner wall and the placement plate of the furnace body.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] 1. By setting up structures such as the main shaft, placement plate and mounting seat, the placement plate drives multiple mounting seats and metal blanks to rotate synchronously and slowly, thereby improving the uniformity of heating of the metal blanks and ensuring the sintering time. The heat insulation plate divides the inner cavity of the furnace into two upper and lower areas, thereby preventing the heat in the lower part of the furnace cavity from overflowing and causing heat loss when observing the metal accessories after sintering.

[0021] 2. By setting structures such as a circular plate, a box body and a nozzle, the sintering aid is squeezed to multiple nozzles and sprayed out during the sintering process of the metal blank. The sprayed sintering aid contacts the metal blank, thereby increasing the sintering speed during the sintering process of the metal blank, improving the air permeability of the sintering mixture, and forming the required solid solution structure, inhibiting defective solid solution or low-temperature lattice transformation, and improving the sintering effect and product performance;

[0022] 3. Through the wedge-shaped protrusion, Z-shaped plate and circular plate and other structures, the push plate will drive the metal blank to move upward for a distance through the mounting seat. The mounting seat and the inner wall of the through hole are in close contact to reduce heat loss. Then the metal blank will move to the upper part of the insulation plate, which is convenient for the user to open the glass furnace door to observe the sintered metal blank on the mounting seat, and the heat in the lower part of the inner cavity of the furnace will not be lost in large quantities;

[0023] 4. During the upward movement of the push plate, the vertical axis, the round tube and the spiral groove are arranged so that the round tube rotates during the downward movement, and the round tube drives the flame spray gun to move into the concave part at the top of the metal blank. When the user judges that the concave part of the metal blank is not sintered completely through observation, the corresponding flame spray gun is turned on at this time. Then, when the flame spray gun enters the concave part of the metal blank, it drives the flame spray gun to perform rotary sintering on it, thereby improving the sintering effect of the metal blank;

[0024] 5. Make the output end of the driving motor rotate rapidly. When the limit rod on the side wall of the circular plate contacts the bottom end of the Z-shaped plate, the limit rod will push the Z-shaped plate to rotate a certain angle, so that the Z-shaped plate drives the block to disengage from the inside of the card slot, allowing the metal blank to re-enter the lower space of the insulation board for insulation treatment for a period of time to complete the entire sintering process. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of a vacuum furnace high temperature sintering furnace for metal blanks proposed by the present invention;

[0026] Figure 2 This is a schematic diagram of the structure of a single switching mechanism used in a high-temperature sintering furnace for metal blanks in a vacuum furnace proposed by the present invention;

[0027] Figure 3 This is a schematic diagram of the structure inside a box body in a high-temperature sintering furnace of a metal blank vacuum furnace proposed by the present invention;

[0028] Figure 4 A schematic diagram of the connection relationship between a torsion spring, a Z-shaped plate and a push plate in a high-temperature sintering furnace for a metal blank vacuum furnace proposed by the present invention;

[0029] Figure 5 This is a schematic diagram of the positional relationship of a Z-shaped plate, a clamping block and a clamping slot in a high-temperature sintering furnace for a metal blank vacuum furnace proposed by the present invention;

[0030] Figure 6 A schematic diagram of the connection relationship between a first rack, a second rack and a transmission gear in a high-temperature sintering furnace for metal blanks in a vacuum furnace proposed by the present invention;

[0031] Figure 7 This is a schematic diagram of the connection relationship between the spiral groove and the guide rod in a high-temperature sintering furnace for metal blanks in a vacuum furnace proposed by the present invention;

[0032] Figure 8 for Figure 1 A magnified schematic diagram of the structure of part A;

[0033] Fig. 9 This is a schematic diagram of the internal structure of a circular groove in a high-temperature sintering furnace for metal blanks in a vacuum furnace proposed by the present invention.

[0034] In the figure: 1, furnace body; 2, main shaft; 3, first conical wheel; 4, second conical wheel; 5, placement plate; 6, mounting seat; 7, support pile; 8, through hole; 9, push plate; 10, rotating shaft; 11, raised wheel; 12, circular plate; 13, circular shaft; 14, limit rod; 15, vertical plate; 16, Z-shaped plate; 17, wedge-shaped protrusion; 18, torsion spring; 19, clamping block; 20, clamping groove; 21, support plate; 22, bracket; 23, box body; 25, slide plate; 26, circular plate; 27, offset Spindle; 28, connecting rod; 29, through hole; 30, circular groove; 31, rotary joint; 32, heater; 33, first rack; 34, transmission gear; 35, second rack; 36, vertical axis; 37, circular tube; 38, spiral groove; 39, guide rod; 40, flamethrower; 41, connecting plate; 42, driving motor; 43, first gear; 44, second gear; 45, nozzle; 46, first one-way tube; 47, second one-way tube; 48, electric sliding door; 49, heat insulation board. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Reference Figure 1 - Fig. 9 , a vacuum furnace high temperature sintering furnace for metal blanks, comprising a furnace body 1, a plurality of supporting legs fixedly mounted on the side wall of the furnace body 1, a main shaft 2 rotatably connected to the bottom wall of the furnace body 1, and a placement plate 5 fixedly connected to the side wall of the main shaft 2;

[0037] The placing plate 5 is provided with a switching mechanism for observing the sintering state of the metal blank; Figure 1 , Figure 2 and Figure 4As shown, the switching mechanism includes a support plate 21 symmetrically fixed on the bottom wall of the placement plate 5, and the top wall of the placement plate 5 is symmetrically penetrated and slidably connected with a push plate 9, and each push plate 9 top wall is fixedly connected with a mounting seat 6, and the mounting seat 6 is a prior art, and can stably place the metal blank, and the bottom wall of the push plate 9 is provided with a through hole 8, and the inner wall of the through hole 8 is penetrated and rotatably connected with a rotating shaft 10, and the side wall of the rotating shaft 10 is fixedly connected with a raised wheel 11, and one end of the rotating shaft 10 is rotatably connected with a Z-shaped plate 16, and the side wall of the Z-shaped plate 16 is fixedly connected with a torsion spring 18, and the other end of the torsion spring 18 is connected to the side wall of the push plate 9 The wall is fixedly connected, a block 19 is fixedly installed on the side wall of one end of the Z-shaped plate 16, a slot 20 is opened on the side wall of each support plate 21, the bottom wall of the placement plate 5 is fixedly connected to the vertical plate 15, the lower end of the vertical plate 15 is rotatably connected to the circular shaft 13, the side wall of the circular shaft 13 is fixedly connected to the circular plate 12, the side wall of the circular plate 12 is fixedly connected to the wedge-shaped protrusion 17, the side wall of the circular plate 12 is fixedly connected to the limit rod 14, the top side wall of the main shaft 2 is fixed with a heat insulation plate 49, the heat insulation plate 49 can reduce the heat loss to the upper side, and the inner wall of the heat insulation plate 49 is symmetrically provided with through holes 29.

[0038] Each through hole 29 is provided with an electric sliding door 48, which is a prior art and is composed of an electric slide rail and an electric cover. The raised wheel 11 and the side wall of the circular plate 12 slide against each other, and the clamping block 19 is clamped in the clamping groove 20.

[0039] like Figure 2 and Figure 3 As shown, one end of the rotating shaft 10 away from the torsion spring 18 is fixedly connected to a circular plate 26, the side wall of the circular plate 26 is eccentrically fixedly connected to an eccentric shaft 27, the side wall of the eccentric shaft 27 is rotatably connected to one end of a connecting rod 28, the side wall of the push plate 9 is fixedly connected to a box body 23, the inner wall of the box body 23 is sealingly and slidably connected to a slide plate 25, the other end of the connecting rod 28 is rotatably connected to the side wall of the slide plate 25, a plurality of nozzles 45 are installed on the mounting seat 6, and a first one-way tube 46 and a second one-way tube 47 are fixedly connected through the inner wall of the box body 23.

[0040] like Fig. 9 As shown, a circular groove 30 is opened on the bottom wall of the main shaft 2, and a rotating joint 31 is fixedly installed on the bottom end of the main shaft 2. The end of the first one-way tube 46 away from the box body 23 passes through the side wall of the main shaft 2 and is fixedly connected to the circular groove 30. The end of the second one-way tube 47 away from the box body 23 is fixedly connected to multiple adjacent nozzles 45. The second one-way tube 47 only allows the sintering aid inside the box body 23 to be squeezed to the multiple nozzles 45 for spraying. One end of the second one-way tube 47 is a single-pipeline structure, and the other end of the second one-way tube 47 is a multi-pipeline structure. The first one-way tube 46 only allows the sintering aid from the outside to enter the box body 23 through the rotating joint 31 and the circular groove 30.

[0041] A plurality of brackets 22 are fixed to the top wall of the heat insulation board 49, and a transmission gear 34 is rotatably connected to the inner wall of each bracket 22. A first rack 33 is slidably connected to the inner wall of the heat insulation board 49, and the first rack 33 is in an L-shaped structure. One end of the first rack 33 is fixedly connected to the bottom wall of the mounting seat 6, and a second rack 35 is slidably connected to the inner wall of the bracket 22. The side wall of the second rack 35 is fixedly connected to one end of a connecting plate 41, and a circular tube 37 is rotatably connected to the side wall of the other end of the connecting plate 41. The connecting plate 41 drives the circular tube 37 to move in a vertical direction without interfering with the rotation of the circular tube 37. A flamethrower 40 is fixedly installed on the side wall of the circular tube 37. The flamethrower 40 is a prior art and can spray high-temperature flames for sintering under the action of a controller.

[0042] The first rack 33 is meshed with the transmission gear 34 , and the second rack 35 is meshed with the transmission gear 34 . The first rack 33 and the second rack 35 are respectively disposed on both sides of the transmission gear 34 .

[0043] Two vertical shafts 36 are slidably connected to the inner wall at the top of the furnace body 1. A dovetail-shaped annular groove is provided on the inner wall at the top of the furnace body 1. The two vertical shafts 36 cooperate to slide inside the dovetail-shaped annular groove. When the heat insulation plate 49 rotates, the second rack 35 will be driven to move through the bracket 22, and the second rack 35 will drive the circular tube 37 to move synchronously through the connecting plate 41, so that the vertical shaft 36 slides on the inner wall at the top of the furnace body 1 but will not disengage, ensuring that the position of the circular tube 37 relative to the upper part of the heat insulation plate 49 remains unchanged. Each circular tube 37 is sleeved on the side of a vertical shaft 36, and a guide rod 39 is fixedly connected to the side wall of the vertical shaft 36. A spiral groove 38 is provided on the side wall of the circular tube 37, and the guide rod 39 is slidably connected inside the spiral groove 38.

[0044] The top inner wall of the furnace body 1 is fixedly connected to the first conical wheel 3 through a plurality of support piles 7, one end of each circular shaft 13 is fixedly connected to the second conical wheel 4, the first conical wheel 3 and the second conical wheel 4 are meshingly connected, the bottom wall of the furnace body 1 is fixedly connected to the driving motor 42, and the output end of the driving motor 42 is fixedly connected to the first gear 43.

[0045] A second gear 44 is fixedly connected to the side wall of the bottom end of the main shaft 2 , and the second gear 44 is meshingly connected with the first gear 43 .

[0046] A door hole is opened on the top wall of the furnace body 1, and a glass furnace door is rotatably installed on the top wall of the furnace body 1. Multiple heaters 32 are installed on the inner wall of the furnace body 1 and the placement plate 5. The heaters 32 are existing technologies and are not described in detail here.

[0047] In the present invention, all parts are made of high-temperature resistant materials. Each metal blank is placed and mounted on a corresponding mounting seat 6. The heater 32 is turned on to heat and sinter multiple metal blanks. Then the user turns on the driving motor 42. The output end of the driving motor 42 drives the first gear 43 fixedly connected to it to rotate slowly. The first gear 43 drives the second gear 44 to rotate. The second gear 44 drives the main shaft 2 to rotate. The main shaft 2 drives the placement plate 5 fixedly connected to its side wall to rotate. The placement plate 5 drives multiple mounting seats 6 and metal blanks to rotate synchronously and slowly, thereby improving the uniformity of heating of the metal blanks and ensuring the sintering time. The main shaft 2 will also drive the heat insulation plate 49 to rotate. The side wall of the heat insulation plate 49 and the inner wall of the furnace body 1 are sealed and slid to avoid heat loss.

[0048] Since the first conical wheel 3 is fixed to the inner wall of the bottom of the furnace body 1 through a plurality of supporting piles 7, the placing plate 5 will also drive the circular shaft 13 and the second conical wheel 4 to rotate with the main shaft 2 as the center through the vertical plate 15 during the rotation process. The second conical wheel 4 is meshed and connected with the first conical wheel 3, so the second conical wheel 4 will rotate under the meshing action of the first conical wheel 3. The wheel diameter of the second conical wheel 4 is much larger than the wheel diameter of the first conical wheel 3, and then the second conical wheel 4 drives the circular shaft 13 to rotate more slowly, and then the circular shaft 13 drives the circular plate 12 to rotate synchronously, the circular plate 12 and the cam wheel 11 are in contact with each other, and the side wall of the circular plate 12 and the surface of the cam wheel 11 have rough protrusions, and the protrusions that bite each other on the side wall of the circular plate 12 and the surface of the cam wheel 11 form a bite force so that the circular plate 12 drives the cam wheel 11 to rotate, and the cam wheel 11 will drive the rotating shaft 10 to rotate, and the rotating shaft 1 0 drives the circular plate 26 fixed at one end to rotate, and the circular plate 26 drives the eccentric shaft 27 eccentrically fixed on its side wall to move, so that the eccentric shaft 27 drives the slide plate 25 to slide back and forth in a sealed manner inside the box body 23 through the connecting rod 28, and the rotary joint 31 is fixedly connected to the external sintering aid tank through the feeding pipe. Then the slide plate 25 will draw the sintering aid from the external sintering aid tank into the box body 23 through the first one-way tube 46, the circular groove 30, the rotary joint 31 and the feeding pipe, and then squeeze the sintering aid inside the box body 23 to multiple nozzles 45 through the second one-way tube 47 for spraying. The sprayed sintering aid contacts the metal blank, thereby increasing the sintering speed during the sintering process of the metal blank, improving the permeability of the sintering mixture, forming the required solid solution structure, inhibiting defective solid solution or low-temperature lattice transformation, and improving the sintering effect and product performance.

[0049] During the slower rotation of the circular plate 12, the wedge-shaped protrusion 17 on the circular plate 12 will slide against the convex wheel 11, and the wedge-shaped protrusion 17 will drive the push plate 9 to move upward for a distance through the convex wheel 11 and the rotating shaft 10. At this time, the electric sliding door 48 is moved away from the through hole 29 by the controller to form an open and closed state, and the push plate 9 will drive the metal blank to move upward for a distance through the mounting seat 6. The mounting seat 6 and the inner wall of the through hole 29 are in close contact to reduce heat loss, and the metal blank will move to the upper part of the heat insulation plate 49, and the block 19 fixed at one end of the Z-shaped plate 16 begins to move upward. Finally, it is slidably connected with the side wall of the support plate 21. When the rotating shaft 10 moves upward, the rotating shaft 10 drives the Z-shaped plate 16 and the clamping block 19 to move upward for a distance on the side wall of the support plate 21 synchronously. When the clamping block 19 moves to the position of the clamping slot 20, under the elastic force of the torsion spring 18, the clamping block 19 is clamped inside the clamping slot 20, limiting the push plate 9, the mounting seat 6 and the metal blank. At this time, the raised wheel 11 and the circular plate 12 and the wedge-shaped protrusion 17 are out of contact, which is convenient for the user to open the glass furnace door to observe the sintered metal blank on the mounting seat 6, and the heat in the lower part of the inner cavity of the furnace body 1 will not be lost in large quantities.

[0050] During the upward movement of the push plate 9, the mounting seat 6 will also drive the first rack 33 to move upward synchronously, and the first rack 33 will drive the second rack 35 to move downward for a distance through the transmission gear 34, then the second rack 35 will drive the round tube 37 to move downward synchronously through the connecting plate 41. Since the side wall of the vertical shaft 36 is fixedly connected with the guide rod 39, and the inner wall of the round tube 37 is provided with a spiral groove 38, the round tube 37 will rotate during the downward movement, and the round tube 37 drives the flamethrower 40 to move into the recessed portion of the top wall of the barrel-shaped metal blank. When the user determines through observation that the recessed portion of the metal blank is not completely sintered, the corresponding flamethrower 40 is turned on at this time. Then, when the flamethrower 40 enters the recessed portion of the metal blank, it drives the flamethrower 40 to perform rotational sintering on it, thereby improving the sintering effect of the metal blank.

[0051] Then, the output end of the driving motor 42 is rotated rapidly, thereby increasing the rotation speed of the circular plate 12 driven by the circular shaft 13. When the limiting rod 14 on the side wall of the circular plate 12 and the bottom end of the Z-shaped plate 16 are in contact with each other, the limiting rod 14 will push the Z-shaped plate 16 to rotate a certain angle, so that the Z-shaped plate 16 drives the block 19 to disengage from the inside of the card slot 20. Then, under the action of gravity, the metal blank, the mounting seat 6, the push plate 9 and other structures move downward synchronously, so that the metal blank re-enters the lower space of the insulation plate 49 for insulation treatment for a period of time, and then completes the entire sintering process.

[0052] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A vacuum furnace for high temperature sintering of metal blanks, comprising a furnace body (1), characterized in that: A main shaft (2) is rotatably connected to the bottom wall of the furnace body (1), and a placement plate (5) is fixedly connected to the side wall of the main shaft (2); The placement plate (5) is provided with a switching mechanism for observing the sintering state of the metal blank; the switching mechanism comprises a support plate (21) symmetrically fixed to the bottom wall of the placement plate (5); a push plate (9) is symmetrically penetrated and slidably connected to the top wall of the placement plate (5); each push plate (9) is fixedly connected to a mounting seat (6) on the top wall; a through hole (8) is opened on the bottom wall of the push plate (9); a rotating shaft (10) is rotatably connected to the inner wall of the through hole (8); a convex wheel (11) is fixedly connected to the side wall of the rotating shaft (10); and a Z wheel is rotatably connected to the side wall of one end of the rotating shaft (10). The Z-shaped plate (16) is elastically connected to the side wall of the push plate (9) through a torsion spring (18); a clamping block (19) is fixedly installed on one end of the side wall of the Z-shaped plate (16); each side wall of the support plate (21) is provided with a clamping groove (20); the bottom wall of the placement plate (5) is rotatably connected to a circular shaft (13) through a vertical plate (15); the side wall of the circular shaft (13) is fixedly connected to a circular plate (12); the side wall of the circular plate (12) is fixedly connected to a wedge-shaped protrusion (17); and the side wall of the circular plate (12) is fixedly connected to a limiting rod (14); A heat insulation plate (49) is fixed to the top side wall of the main shaft (2), a plurality of through holes (29) are symmetrically opened on the inner wall of the heat insulation plate (49), an electric sliding door (48) is installed on each of the through holes (29), the raised wheel (11) and the side wall of the circular plate (12) slide against each other, and the clamping block (19) is clamped in the inside of the clamping groove (20); The end of the rotating shaft (10) away from the torsion spring (18) is fixedly connected to a circular plate (26), the side wall of the circular plate (26) is eccentrically fixedly connected to an eccentric shaft (27), the side wall of the eccentric shaft (27) is rotatably connected to one end of a connecting rod (28), the side wall of the push plate (9) is fixedly connected to a box body (23), the inner wall of the box body (23) is sealingly slidably connected to a slide plate (25), the other end of the connecting rod (28) is rotatably connected to the side wall of the slide plate (25), a plurality of nozzles (45) are mounted on the mounting seat (6), and a first one-way tube (46) and a second one-way tube (47) are fixedly connected through the inner wall of the box body (23); A circular groove (30) is formed on the bottom wall of the main shaft (2); a rotary joint (31) is fixedly mounted on the bottom end of the main shaft (2); an end of the first one-way tube (46) away from the box body (23) passes through the side wall of the main shaft (2) and is fixedly connected to the circular groove (30); an end of the second one-way tube (47) away from the box body (23) is fixedly connected to a plurality of adjacent nozzles (45); A plurality of brackets (22) are fixed to the top wall of the heat insulation board (49), and a transmission gear (34) is rotatably connected to the inner wall of each bracket (22). A first rack (33) is slidably connected to the inner wall of the heat insulation board (49), and the first rack (33) is in an L-shaped structure. One end of the first rack (33) is fixedly connected to the bottom wall of the mounting seat (6). A second rack (35) is slidably connected to the inner wall of the bracket (22), and a side wall of the second rack (35) is fixedly connected to one end of a connecting plate (41). A round tube (37) is rotatably connected to the other end of the side wall of the connecting plate (41), and a flamethrower (40) is fixedly mounted on the side wall of the round tube (37).

2. A vacuum furnace high temperature sintering furnace for metal blanks according to claim 1, characterized in that: The top inner wall of the furnace body (1) is slidably connected to a plurality of vertical shafts (36); each of the circular tubes (37) is sleeved on the side of a vertical shaft (36); a guide rod (39) is fixedly connected to the side wall of the vertical shaft (36); a spiral groove (38) is formed on the side wall of the circular tube (37); and the guide rod (39) is slidably connected inside the spiral groove (38).

3. A vacuum furnace high temperature sintering furnace for metal blanks according to claim 1, characterized in that: The first rack (33) is meshedly connected to the transmission gear (34), the second rack (35) is meshedly connected to the transmission gear (34), and the first rack (33) and the second rack (35) are respectively arranged at two sides of the transmission gear (34).

4. A vacuum furnace high temperature sintering furnace for metal blanks according to claim 1, characterized in that: The top inner wall of the furnace body (1) is fixedly connected to a first conical wheel (3) via a plurality of support piles (7), one end of each of the circular shafts (13) is fixedly connected to a second conical wheel (4), and the first conical wheel (3) and the second conical wheel (4) are meshingly connected.

5. A vacuum furnace high temperature sintering furnace for metal blanks according to claim 4, characterized in that: A driving motor (42) is fixedly connected to the bottom wall of the furnace body (1), a first gear (43) is fixedly connected to the output end of the driving motor (42), a second gear (44) is fixedly connected to the bottom side wall of the main shaft (2), and the second gear (44) is meshingly connected to the first gear (43).

6. A vacuum furnace high temperature sintering furnace for metal blanks according to claim 1, characterized in that: The top wall of the furnace body (1) is provided with a glass furnace door, and a plurality of heaters (32) are installed on the inner side wall of the furnace body (1) and the placement plate (5).

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