Preparation method and system for a high-toughness tungsten alloy preformed fragment

Abstract

The present invention relates to the technical field of prefabricated fragment sintering, specifically a preparation method and system for high-toughness tungsten alloy prefabricated fragments; when installing a pipe on an installation column, through a first collar, a second collar, a sliding plate, an installation ring, a first hinge plate and a second hinge plate, it is possible to install and sinter pipes of different sizes, improving the sintering efficiency of the pipes; and there is a gap between the installation columns, so that when the installation pipes are sintered, there is a gap between adjacent installation pipes, enabling each installation pipe to be heated more evenly during sintering, thereby reducing the sintering time, improving the sintering quality and the sintering efficiency; and making the material of the installation column the same as that of the heat-conducting wire. When the pipe is installed on the installation column, there is a gap between the pipe and the installation column, so that during the sintering process, the installation column simultaneously dissipates heat to heat the inside of the pipe, enabling the pipe to be sintered from both the inside and the outside, further improving the sintering efficiency and the heat uniformity of the pipe.

Description

Technical Field

[0001] The invention relates to the technical field of sintering prefabricated fragments, in particular to a preparation method and system of a high-toughness tungsten alloy prefabricated fragment. Background Art

[0002] Prefabricated fragments are pre-made fragments with specific shapes and sizes.

[0003] Prefabricated fragments include tile-shaped, cubic, spherical, short rod, cylindrical, etc. Spherical fragments have low flight resistance and can maintain good stability in the air; cylindrical fragments, especially tungsten columns, have high density and strong armor-piercing ability;

[0004] The existing prefabricated fragments usually require the following processes during the manufacturing process: mixing - granulation - pressing - sintering - heat treatment - finished product;

[0005] In the process of preparing the prefabricated fragments, especially in the sintering process, a vacuum sintering furnace is usually required. However, in the process of using the vacuum sintering furnace, especially in the sintering of the columnar prefabricated fragments, the prefabricated fragments are usually columnar pipes. After the columnar pipes are sintered and heat-treated, the heat-treated pipes are cut into uniform pipe sections, and then grooves are carved on the outer wall of the pipe section using a machine tool to form uniform diamond blocks on the surface.

[0006] In the process of sintering the pipe, a bracket is usually used to place the pipe on the bracket, and the pipes are stacked one by one on the bracket. The bracket is then placed in the sintering chamber inside the sintering furnace, and the sintering furnace is started to sinter the pipe. After the sintering is completed, the bracket is then taken out and the pipe is taken out of the bracket. However, when the pipes are placed on the bracket for sintering, the pipes are stacked together, and there will be a problem of uneven heating between the inner pipe and the outermost pipe, resulting in quality defects in the steel pipe. If such quality defects are to be avoided, the sintering time needs to be extended to fully sinter, resulting in reduced sintering efficiency.

[0007] In summary, in order to solve the technical problem raised in this article, the present invention proposes a method and system for preparing high-toughness tungsten alloy prefabricated fragments. Summary of the invention

[0008] The present invention provides a preparation system for high-toughness tungsten alloy prefabricated fragments, the preparation system comprising a sintering furnace; the sintering furnace comprises a furnace body and a sintering cavity arranged in the furnace body,

[0009] The sintering chamber includes heating wires arranged on the inner wall, a cover plate arranged at the feed inlet, a cooling box arranged at a position far from its feed inlet, and a driving device arranged inside the cooling box. A driving plate is arranged at a position of the sintering chamber far from the feed inlet, and the driving device is connected to the driving plate. An air inlet and an air outlet are arranged at the upper end of the sintering chamber. The cooling box is communicated with the upper and lower ends of the sintering chamber through heat exchange tubes arranged.

[0010] A plurality of mounting posts are evenly arranged on the driving plate; a first collar and a second collar are arranged on each mounting post.

[0011] An installation ring is arranged on each first collar, and three groups of sliding grooves are opened on the installation ring. The distance from each group of sliding grooves to the mounting post increases from the inside to the outside. A sliding plate is slidably connected inside each sliding groove, and a spring is arranged between the sliding plate and the first collar. There are two second collars on each mounting post, and a first hinge plate and a second hinge plate are arranged between the two second collars. A convexity is formed upward between the first hinge plate and the second hinge plate.

[0012] A plurality of through holes are arranged on the cover plate, and a push tube corresponding to the position of each mounting post is arranged in the through hole. The inner diameter of the push tube is the same as the outer diameter of the mounting post.

[0013] As a preferred solution of the present application; the mounting post close to the installation ring extends into the inside of the driving plate. The driving plate is made of a heat-insulating material, and the mounting post and the heating wire are made of the same material, which is tungsten.

[0014] As a preferred solution of the present application; through grooves are evenly opened on the installation ring, and the through grooves are located at positions between adjacent sliding grooves.

[0015] As a preferred solution of the present application; a driving ring is arranged at one end of the cover plate located outside the sintering chamber, and one end of the driving ring close to the cover plate is communicated with each push tube.

[0016] As a preferred solution of the present application; a through groove is opened in the middle of the cover plate, and a first rotating disk is rotatably connected inside the through groove. The through holes are opened on the first rotating disk; a columnar groove is opened on the driving plate, and a second rotating disk is slidably connected inside the columnar groove. The mounting post is slidably connected to the second rotating disk. A conductive disk is arranged inside the second rotating disk, and the mounting post is connected to the inner conductive disk. The conductive disk is slidably connected to a conductive column inside the columnar groove; a driving motor is arranged on the furnace cover of the furnace body, and two driving columns are arranged on the output shaft of the driving motor. Two adjusting columns are arranged at the central position of the first rotating disk, and the distance between the adjusting columns is greater than the size of the output shaft of the driving motor.

[0017] As a preferred solution of the present application; the first rotating disk, the second rotating disk, the driving disk and the cover plate are all made of ceramic fiber material.

[0018] As a preferred solution of the present application; an N-shaped bracket is provided on the rotating shaft at the connection of the first hinge plate and the second hinge plate, and both ends of the N-shaped bracket are connected to both ends of the rotating shafts at both ends of the second hinge plate and the first hinge plate.

[0019] A preparation method of high-toughness tungsten alloy prefabricated fragments, which is applicable to the preparation system of the above-mentioned high-toughness tungsten alloy prefabricated fragments;

[0020] S1: First, open the furnace cover on the sintering furnace body, then open the cover plate on the sintering cavity. Subsequently, the staff controls the driving device to work, and the driving device extends, so that the driving plate pushes towards the feed port of the sintering cavity, and the driving plate drives the mounting column to be pushed out of the sintering cavity; Subsequently, the staff sleeves the pipe of the prefabricated fragment on the mounting column;

[0021] S2: After the pipe is installed on the mounting column, push the pipe on the mounting column towards the direction of the second collar until the end contacts the sliding plate on the mounting ring; When the inner diameter of the pipe contacts the innermost sliding plate, the end of the pipe will push the two groups of sliding plates on the outside, and the outside of the innermost sliding plate supports the inner wall of the pipe;

[0022] S3: After the placement of the pipe is completed, the driving device pulls the driving plate, so that the driving plate drives the mounting column and the pipe placed above it into the sintering cavity. Subsequently, the staff closes the cover plate, and the staff pushes the push pipe. The pipe wall of the push pipe pushes the second collar on the outside, and the first hinge plate and the second hinge plate rotate at the hinge, until the hinge point of the first hinge plate and the second hinge plate pushes against the inner wall of the pipe;

[0023] S4: Then close the furnace cover on the furnace body and start the sintering furnace; Open the air outlet, and the air outlet extracts the air inside the sintering cavity; Subsequently, close the air outlet, open the air inlet, inject ammonia gas into the sintering cavity through the air inlet. After injecting ammonia gas, close the air inlet and start sintering; During sintering, the heating wire inside the sintering cavity heats the inside and sinters the pipe inside;

[0024] S5: After sintering is completed, open the cooling box, and the heat exchange pipe extracts the high-temperature gas inside the sintering cavity and discharges the high-temperature gas out of the furnace body. Subsequently, draw the outside gas into the cooling box. After drawing it into the cooling box, inject the outside cooling gas into the sintering cavity through the heat exchange pipe below, and cool the pipe by reciprocating circulation; After cooling, take out the sintered pipe.

[0025] The beneficial effects of the present invention are as follows:

[0026] When installing the pipe on the installation column, through the first collar, the second collar, the sliding plate, the installation ring, the first hinge plate and the second hinge plate, it is possible to install and sinter pipes of different sizes, improving the sintering efficiency of the pipes; and there is a gap between the installation columns, so that when the installation pipes are sintered, there is a gap between adjacent installation pipes, making each installation pipe heat more evenly during sintering, thereby reducing the sintering time, improving the sintering quality and the sintering efficiency; and making the material of the installation column the same as that of the heat conduction wire. When the pipe is installed on the installation column, there is a gap between the pipe and the installation column, so that during the sintering process, the installation column simultaneously dissipates heat to heat the inside of the pipe, making the pipe sintered from both inside and outside, further improving the sintering efficiency and the heat evenness of the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a perspective view of the furnace body in the present invention;

[0028] Figure 2 is an internal structure view of the furnace body in the present invention;

[0029] Figure 3 is a structural view of the sintering cavity and the cooling box in the present invention;

[0030] Figure 4 is a structural view of the drive motor and the drive ring in the present invention;

[0031] Figure 5 is a structural view of the heating wire in the present invention;

[0032] Figure 6 is a sectional view of the sintering cavity and the cooling box in the present invention;

[0033] Figure 7 is a structural view of the drive column and the adjustment column in the present invention;

[0034] Figure 8 is a structural view of the drive plate in the present invention;

[0035] Figure 9 is a structural view of the column-shaped groove and the second rotating disk in the present invention;

[0036] Figure 10 is a structural view of the sliding plate and the installation ring in the present invention;

[0037] Figure 11 is a structural view of the push pipe and the installation column in the present invention;

[0038] Figure 12 is a structural view of the first hinge plate, the second hinge plate and the n-shaped bracket in the present invention;

[0039] Figure 13It is the structural view of the second collar and the mounting ring in the present invention;

[0040] Figure 14 It is the method flow chart in the present invention;

[0041] In the figure: furnace body 1, sintering chamber 11, heating wire 12, cover plate 13, cooling box 14, driving device 15, driving plate 111, air inlet 112, air outlet 113, heat exchange tube 141, mounting post 16, first collar 161, second collar 162, mounting ring 163, chute 164, sliding plate 165, first hinge plate 166, second hinge plate 167, through hole 131, push tube 132, through slot 168, driving ring 133, through slot 134, first rotating disk 135, second rotating disk 115, conductive disk 117, driving motor 17, driving post 171, adjusting post 172, n-shaped bracket 169. Detailed implementation manners

[0042] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners. Embodiment

[0043] As Figures 1 to 13 shown; a preparation system for high-toughness tungsten alloy prefabricated fragments, the preparation system includes a sintering furnace; the sintering furnace includes a furnace body 1 and a sintering chamber 11 arranged in the furnace body 1,

[0044] The sintering chamber 11 includes a heating wire 12 arranged on the inner wall and a cover plate 13 arranged at the feed port, a cooling box 14 arranged at a position far from its feed port, and a driving device 15 arranged inside the cooling box 14, a driving plate 111 arranged at a position far from the feed port of the sintering chamber 11, and the driving device 15 is connected to the driving plate 111; an air inlet 112 and an air outlet 113 are arranged at the upper end of the sintering chamber 11; the cooling box 14 is communicated with the upper and lower ends of the sintering chamber 11 through heat exchange tubes 141 arranged;

[0045] A plurality of mounting posts 16 are uniformly arranged on the driving plate 111; a first collar 161 and a second collar 162 are arranged on each mounting post 16;

[0046] A mounting ring 163 is arranged on each first collar 161, three groups of chutes 164 are opened on the mounting ring 163, the distance of each group of chutes 164 from the mounting post 16 increases from inside to outside, a sliding plate 165 is slidably connected inside each chute 164, and a spring is arranged between the sliding plate 165 and the first collar 161; there are two second collars 162 on each mounting post 16, a first hinge plate 166 and a second hinge plate 167 are arranged between the two second collars 162, and the ends of the first hinge plate 166 and the second hinge plate 167 close to each other are hinged, and the hinge point bulges upward;

[0047] A plurality of through holes 131 are provided on the cover plate 13, and a push tube 132 corresponding to the position of each mounting post 16 is provided in the through hole 131. The inner diameter of the push tube 132 is the same as the outer diameter of the mounting post 16;

[0048] The mounting post 16 near the mounting ring 163 extends into the interior of the driving plate 111. The driving plate 111 is made of a heat-insulating material. The mounting post 16 and the heating wire 12 are made of the same material, which is tungsten;

[0049] The specific working process is as follows;

[0050] When in use, first open the furnace cover on the sintering furnace body 1. After the furnace cover is opened, the sintering cavity 11 inside the furnace body 1 is exposed. Then open the cover plate 13 on the sintering cavity 11. After the cover plate 13 is opened, the heat conduction wire inside the sintering cavity 11 is exposed. Then the staff controls the driving device 15 to work. The driving device 15 is a telescopic device in the prior art. The driving device 15 is located inside the cooling box 14. The telescopic end of the driving device 15 penetrates the inner wall of the cooling box 14 close to the sintering cavity 11, and at the same time, the telescopic end of the driving device 15 penetrates the inner wall between the sintering cavity 11 and the cooling box 14, so that the telescopic end of the driving device 15 is located inside the sintering cavity 11; the driving device 15 is connected to the driving plate 111 inside the sintering cavity 11;

[0051] After the furnace cover on the furnace body 1 and the cover plate 13 of the sintering cavity 11 are opened, the driving device 15 extends and pushes the driving plate 111, so that the driving plate 111 is pushed towards the feed port of the sintering cavity 11. The driving plate 111 drives the mounting post 16 to be pushed out of the sintering cavity 11. Then the staff sleeves the pipe of the prefabricated fragment on the mounting post 16. The sizes of the first collar 161 and the second collar 162 on the mounting post 16 are smaller than the smallest-sized pipe. After the pipe is installed on the mounting post 16, the pipe is pushed on the mounting post 16 in the direction of the second collar 162 until the end contacts the slide plate 165 on the second collar 162; when the inner diameter of the pipe contacts the innermost slide plate 165, the end of the pipe will push the two groups of outer slide plates 165. The outer slide plates 165 will slide towards the end close to the cooling box 14 inside the two groups of outer chutes 164. At this time, the outside of the innermost slide plate 165 supports the inner wall of the pipe;

[0052] Similarly, when the size of the pipe contacts the skateboard 165 in the middle, the pipe pushes the skateboard 165 on the outermost side, causing the skateboard 165 on the inner side to support the inner wall of the pipe; if the size between the pipe and the skateboard 165 on the outermost side is the same, the outer wall of the skateboard 165 on the outermost side supports the inner side of the pipe; after the pipe is placed, the driving device 15 pulls the driving plate 111, causing the driving plate 111 to drive the mounting post 16 and the pipe placed above it into the sintering chamber 11. Subsequently, the staff closes the cover plate 13. The push pipe 132 provided on the cover plate 13 corresponds to each mounting post 16, and the inner diameter of the push pipe 132 is the same as the inner diameter of the mounting post 16, and the thickness of the push pipe 132 is the same as the thickness of the first collar 161 and the second collar 162; after the cover plate 13 is closed, the staff pushes the push pipe 132, and the push moves inward in the through hole 131. The push pipe 132 is a barrel-shaped structure, and one end of the push pipe 132 located outside the cover plate 13 is not communicated with the outside; when the push pipe 132 moves inward in the through hole 131, the mounting post 16 enters the inner diameter of the push pipe 132, and the pipe wall of the push pipe 132 pushes the second collar 162 on the outside, causing the gap between the two second collars 162 to become smaller. When the gap between the two second collars 162 becomes smaller, the first hinge plate 166 and the second hinge plate 167 rotate at the hinge, and the hinge point of the first hinge plate 166 and the second hinge plate 167 moves upward until the hinge point of the first hinge plate 166 and the second hinge plate 167 pushes against the inner wall of the pipe. At this time, the push pipe 132 cannot be pushed inside the through hole 131; the pushing distance of the push pipe 132 inside the through hole 131 is determined by the diameter of the pipe; subsequently, the furnace cover on the furnace body 1 is closed, and the sintering furnace is started;

[0053] After the sintering furnace is started, first open the air outlet 113, and the air outlet 113 extracts the air inside the sintering chamber 11; a vacuum state is formed inside the sintering chamber 11; then close the air outlet 113, open the air inlet 112, and inject ammonia gas into the sintering chamber 11 through the air inlet 112 to make ammonia gas a protective gas; after injecting ammonia gas, close the air inlet 112 and start sintering; during sintering, the heating wire inside the sintering chamber 11 heats the inside, sintering the pipe inside, and during the sintering process, a high-aluminum refractory brick insulation layer is filled between the sintering chamber 11 and the inner wall of the furnace body 1 of the sintering furnace, so that during the sintering process of the sintering chamber 11, heat preservation treatment is carried out on the inside; and the high-aluminum refractory brick insulation layer does not affect the air inlet 112, the air outlet 113, and the heat exchange tube 141;

[0054] After sintering is completed, open the cooling box 14. After the cooling box 14 is opened, the air exchanger inside the cooling box 14 extracts the high-temperature gas inside the sintering chamber 11 through the heat exchange pipe 141 located above the sintering chamber 11. When the high-temperature gas enters the inside of the cooling box 14, the cooling box 14 discharges the high-temperature gas out of the furnace body 1, and then draws in the outside air into the cooling box 14. After being drawn into the cooling box 14, the outside cooling gas is injected into the sintering chamber 11 through the heat exchange pipe 141 below, and the reciprocating cycle cools the pipe; after cooling; open the furnace lid on the furnace body 1, then pull the push pipe 132, pull the push pipe 132 out of the mounting post 16, and then open the cover plate 13; after opening, the driving plate 111 pushes the pipe, and then take out the sintered pipe;

[0055] In the above process, when installing the pipe on the mounting post 16, through the first collar 161, the second collar 162, the sliding plate 165, the mounting ring 163, the first hinge plate 166 and the second hinge plate 167, it is possible to install and sinter pipes of different sizes, improving the sintering efficiency of the pipes;

[0056] Moreover, there is a gap between the mounting posts 16, so that when the installation pipes are sintered, there is a gap between adjacent installation pipes, so that when each installation pipe is sintered, the heat is more evenly distributed, thereby reducing the sintering time, improving the sintering quality, and improving the sintering efficiency;

[0057] And make the material of the mounting post 16 the same as that of the heating wire. When the pipe is installed on the mounting post 16, there is a gap between the pipe and the mounting post 16. During the sintering process, the mounting post 16 simultaneously dissipates heat to heat the inside of the pipe, so that the pipe is sintered inside and outside at the same time, further improving the sintering efficiency and the heat uniformity of the pipe. Embodiment

[0058] As Figures 2 to 13 shown; through slots 168 are evenly formed in the mounting ring 163, and the through slots 168 are located at positions between adjacent sliding grooves 164;

[0059] The specific working process is as follows;

[0060] By evenly forming through slots 168 in the mounting ring 163, and the through slots 168 are located between adjacent sliding grooves 164, when the pipe is installed on the mounting post 16, the inside of the pipe between the second collar 162 and the first collar 161 communicates with the inside of the sintering chamber 11 through the through slots 168 and the first collar 161, so that when sintering the pipe, the heat dissipated by the mounting post 16 can be exchanged with the inside of the sintering chamber 11; when cooling the pipe, the high-temperature gas inside the pipe can be extracted, and the cooling gas can enter the inside of the pipe, improving the cooling effect and the heating effect. Embodiment

[0061] As shown in Figures 1 to 13 Figure; one end of the cover plate 13 located outside the sintering cavity 11 is provided with a driving ring 133, and one end of the driving ring 133 close to the cover plate 13 is communicated with each push tube 132;

[0062] A through groove 134 is opened in the middle of the cover plate 13, and a first rotating disk 135 is rotatably connected inside the through groove 134, and a through hole 131 is opened on the first rotating disk 135; a cylindrical groove 114 is opened on the driving plate 111, and a second rotating disk 115 is slidably connected inside the cylindrical groove 114, a mounting post 16 is slidably connected to the second rotating disk 115, a conductive disk 117 is arranged inside the second rotating disk 115, the mounting post 16 is connected to the conductive disk 117 inside, and the conductive disk 117 is slidably connected to a conductive post inside the cylindrical groove 114; a driving motor 17 is arranged on the furnace cover of the furnace body 1, and two driving posts 171 are arranged on the output shaft of the driving motor 17, and two adjusting posts 172 are arranged at the central position of the first rotating disk 135, and the distance between the adjusting posts 172 is greater than the size of the output shaft of the driving motor 17;

[0063] The first rotating disk 135, the second rotating disk 115, the driving disk and the cover plate 13 are all made of ceramic fiber material;

[0064] The specific working process is as follows;

[0065] A driving rod ring is arranged on the cover plate 13, and one end of the driving ring 133 close to the cover plate 13 is communicated with each push tube 132. When the pipe is installed on the mounting post 16, on the basis of the above embodiment, when the push tube 132 is pushed to push the second collar 162, when the hinge between the first hinge plate 166 and the second hinge plate 167 between the two second collars 162 moves upward, only the driving ring 133 needs to be directly pushed, and the driving ring 133 directly pushes each push tube 132 synchronously, so that it is not necessary to push each of the multiple push tubes 132 one by one, improving the efficiency;

[0066] During the sintering process, a driving motor 17 is arranged on the furnace cover of the furnace body 1, and the driving motor 17 is located at the central part of the furnace cover. After the furnace cover is closed, the output shaft of the driving motor 17 enters between the two adjusting posts 172. During the process, the adjusting posts 172 do not block the driving posts 171. The condition that the adjusting posts 172 and the driving posts 171 do not block each other is that when the output shaft of the driving motor 17 completely enters between the two adjusting posts 172, the driving posts 171 and the adjusting posts 172 are in a perpendicular state;

[0067] After the furnace lid is completely closed, sintering is carried out inside the sintering cavity 11. During the sintering process, the driving motor 17 rotates slowly. When starting to rotate, the two driving columns 171 on the output shaft of the driving motor 17 will gradually approach the two adjusting columns 172 until the driving column 171 contacts the adjusting column 172, causing the driving motor 17 to push the adjusting column 172 through the driving column 171. After the adjusting column 172 is pushed, the adjusting column 172 drives the first rotating disk 135 to rotate. The first rotating disk 135 drives the pushing tube 132 to rotate, and the pushing tube 132 drives the driving ring 133 to rotate. At the same time, since the mounting column 16 is embedded inside the pushing tube 132, the pushing tube 132 drives the mounting column 16 to rotate, and the mounting column 16 drives the second rotating disk 115 to rotate. The second rotating disk 115 drives the conductive disk 117 to rotate. When the conductive disk 117 rotates, it contacts the conductive column inside the columnar groove 114, enabling the conductive column to continuously supply power to the mounting column 16 through the conductive disk 117;

[0068] In the above process, during the sintering of the pipe, it can rotate slowly in the sintering cavity 11, making the pipe heat more evenly during the sintering process, avoiding the problem that the local heating wire oxidizes and conducts heat unevenly, resulting in uneven heating of the pipe in the corresponding area, and thus improving the firing efficiency; and by making the first rotating disk 135, the second rotating disk 115, the driving disk and the cover plate 13 all made of ceramic fiber material, during the sintering process, the first rotating disk, the second rotating disk 115, the driving disk and the cover plate 13 can better insulate the inside of the sintering cavity 11, avoiding the outflow of the temperature inside the sintering cavity 11 and the problem of heat waste. Embodiment

[0069] As Figures 3 to 13 shown; a U-shaped bracket 169 is provided on the rotating shaft at the connection of the first hinge plate 166 and the second hinge plate 167. Both ends of the U-shaped bracket 169 are connected to both ends of the rotating shafts of the second hinge plate 167 and the first hinge plate 166; the upper end of the U-shaped bracket 169 is arc-shaped;

[0070] The specific working process is as follows;

[0071] By providing a U-shaped bracket 169 on the rotating shaft at the connection of the first hinge plate 166 and the second hinge plate 167, and connecting both ends of the U-shaped bracket 169 to the rotating shafts between the second hinge plate 167 and the first hinge plate 166, when the first hinge plate 166 and the second hinge plate 167 move upward, the arc-shaped end on the U-shaped bracket 169 contacts the inner wall of the pipe, making the arc-shaped surface on the U-shaped bracket contact the inner diameter of the pipe more tightly and improving the stability of the pipe. Embodiment

[0072] As Figure 14As shown; A preparation method of high-toughness tungsten alloy prefabricated fragments, which is applicable to the preparation system of the above-mentioned high-toughness tungsten alloy prefabricated fragments;

[0073] S1: First, open the furnace cover on the sintering furnace body 1, then open the cover plate 13 on the sintering cavity 11. Subsequently, the staff controls the driving device 15 to work, and the driving device extends, so that the driving plate 111 is pushed towards the feed port of the sintering cavity 11. The driving plate 111 drives the mounting column 16 to be pushed out of the sintering cavity 11. Subsequently, the staff sleeves the pipe of the prefabricated fragment on the mounting column 16;

[0074] S2: After the pipe is installed on the mounting column 16, push the pipe on the mounting column 16 towards the direction of the second collar 162 until the end contacts the slide plate 165 on the mounting ring 163. When the inner diameter of the pipe contacts the innermost slide plate 165, the end of the pipe will push the two groups of slide plates 165 on the outside, and the outside of the innermost slide plate 165 supports the inner wall of the pipe;

[0075] S3: After the placement of the pipe is completed, the driving device 15 pulls the driving plate 111, so that the driving plate 111 drives the mounting column 16 and the pipe placed above it into the sintering cavity 11. Subsequently, the staff closes the cover plate 13, and the staff pushes the push pipe 132. The pipe wall of the push pipe 132 pushes the second collar 162 on the outside. The first hinge plate 166 and the second hinge plate 167 rotate at the hinge until the hinge point of the first hinge plate 166 and the second hinge plate 167 pushes against the inner wall of the pipe;

[0076] S4: Then close the furnace cover on the furnace body 1 and start the sintering furnace. Open the air outlet 113, and the air outlet 113 extracts the air inside the sintering cavity 11. Then close the air outlet 113, open the air inlet 112, and inject ammonia gas into the sintering cavity 11 through the air inlet 112. After injecting ammonia gas, close the air inlet 112 and start sintering. During sintering, the heating wire inside the sintering cavity 11 heats the inside and sinters the pipe inside;

[0077] S4: After sintering is completed, open the cooling box 14. The heat exchange tube 141 extracts the high-temperature gas inside the sintering cavity 11 and discharges the high-temperature gas out of the furnace body 1. Then draw the outside gas into the cooling box 14. After drawing it into the cooling box 14, inject the outside cooling gas into the sintering cavity 11 through the heat exchange tube 141 below, and cool the pipe by reciprocating circulation. After cooling, take out the sintered pipe.

Claims

1. A system for preparing high-toughness tungsten alloy prefabricated fragments, the system comprising a sintering furnace; the sintering furnace comprises a furnace body and a sintering chamber arranged in the furnace body, characterized in that: The sintering chamber includes a heating wire arranged on the inner wall and a cover plate arranged at the feed inlet, a cooling box arranged away from the feed inlet, and a driving device arranged inside the cooling box, and a driving plate arranged at the sintering chamber away from the feed inlet, and the driving device is connected to the driving plate; an air inlet and an air outlet are arranged at the upper end of the sintering chamber; the cooling box is connected to both ends of the sintering chamber through a heat exchange pipe; A plurality of mounting posts are evenly arranged on the driving plate; a No. 1 collar and a No. 2 collar are arranged on each mounting post; Each No. 1 collar is provided with a mounting ring, and three sets of slide grooves are provided on the mounting ring. The distance between each set of slide grooves and the mounting column increases from the inside to the outside. A slide plate is slidably connected inside each slide groove, and a spring is provided between the slide plate and the No. 1 collar; there are two No. 2 collars on each mounting column, and a No. 1 hinge plate and a No. 2 hinge plate are provided between the two No. 2 collars, and there is an upward protrusion between the No. 1 hinge plate and the No. 2 hinge plate; A plurality of through holes are arranged on the cover plate, and a push tube corresponding to the position of each mounting column is arranged in the through hole, and the inner diameter of the push tube is the same as the outer diameter of the mounting column.

2. The system for preparing high-toughness tungsten alloy prefabricated fragments according to claim 1, characterized in that: The mounting post near the mounting ring extends to the interior of the driving plate. The driving plate is made of heat-insulating material. The mounting post is made of the same material as the heating wire, which is tungsten.

3. The system for preparing high-toughness tungsten alloy prefabricated fragments as claimed in claim 2, characterized in that: The mounting ring is evenly provided with through grooves, and the through grooves are located between adjacent sliding grooves.

4. The system for preparing high-toughness tungsten alloy prefabricated fragments according to claim 1, characterized in that: A driving ring is arranged at one end of the cover plate located outside the sintering chamber, and one end of the driving ring close to the cover plate is communicated with each push tube.

5. The system for preparing high-toughness tungsten alloy prefabricated fragments as claimed in claim 4, characterized in that: A through groove is provided in the middle of the cover plate, and a rotating disk No. 1 is rotatably connected inside the through groove, and a through hole is provided on the rotating disk No. 1; a column-shaped groove is provided on the driving plate, and a rotating disk No. 2 is slidably connected inside the column-shaped groove, and the mounting column is slidably connected to the rotating disk No. 2, and a conductive disk is provided on the inner side of the rotating disk No. 2, and the mounting column is connected to the conductive disk on the inner side, and the conductive disk is slidably connected to the conductive column inside the column-shaped groove; a driving motor is provided on the furnace cover of the furnace body, and two driving columns are provided on the output shaft of the driving motor, and two adjusting columns are provided at the center position of the rotating disk No. 1, and the distance between the adjusting columns is greater than the size of the output shaft of the driving motor.

6. The system for preparing high-toughness tungsten alloy prefabricated fragments according to claim 5, characterized in that: The No. 1 rotating disk, the No. 2 rotating disk, the driving disk and the cover plate are all made of ceramic fiber.

7. The system for preparing high-toughness tungsten alloy prefabricated fragments according to claim 1, characterized in that: An n-shaped bracket is arranged on the rotating shaft at the connection of the first hinge plate and the second hinge plate, and two ends of the n-shaped bracket are connected to two ends of the rotating shaft at two ends of the second hinge plate and the first hinge plate.

8. A method for preparing a high-toughness tungsten alloy prefabricated fragment, the method being applicable to the system for preparing a high-toughness tungsten alloy prefabricated fragment as claimed in any one of claims 1 to 7; characterized in that: S1: First, the furnace cover on the sintering furnace body is opened, and then the cover plate on the sintering chamber is opened. Then the staff controls the driving device to work, and the driving device extends, so that the driving plate is pushed toward the feed port of the sintering chamber, and the driving plate drives the installation column to be pushed out of the sintering chamber; then the staff sets the pipe of the prefabricated fragments on the installation column; S2: After the pipe is installed on the mounting column, push the pipe on the mounting column toward the second sleeve ring until the end contacts the slide plate on the mounting ring; when the inner diameter of the pipe contacts the innermost slide plate, the end of the pipe pushes the two sets of slide plates on the outer side, and the outer side of the innermost slide plate supports the inner wall of the pipe; S3: After the tubes are placed, the driving device pulls the driving plate, so that the driving plate drives the mounting column and the tubes placed thereon into the sintering chamber. Then the staff closes the cover plate and pushes the push tube. The tube wall of the push tube pushes the No. 2 sleeve ring located outside, and the No. 1 hinged plate and the No. 2 hinged plate rotate at the hinge until the hinge point of the No. 1 hinged plate and the No. 2 hinged plate pushes the inner wall of the tube. S4: Then, the furnace cover on the furnace body is closed, and the sintering furnace is started; the air outlet is opened, and the air outlet is used to extract the air inside the sintering chamber; then, the air outlet is closed, and the air inlet is opened, and ammonia is injected into the sintering chamber through the air inlet. After the ammonia is injected, the air inlet is closed, and sintering is started; during sintering, the heat conducting wire inside the sintering chamber heats the inside, and the internal pipe is sintered; S5: When sintering is completed, the cooling box is opened, and the heat exchange tube extracts the high-temperature gas inside the sintering chamber and discharges the high-temperature gas out of the furnace body, and then the outside gas is drawn into the cooling box. After being drawn into the cooling box, the outside cooling gas is injected into the sintering chamber through the heat exchange tube below, and the pipe is cooled by a reciprocating cycle; after cooling, the sintered pipe is taken out.

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