A vacuum sintering apparatus

Abstract

A kind of vacuum sintering equipment, including sintering furnace and the vacuum system for providing vacuum environment to sintering furnace, sintering furnace is provided with furnace door, and sintering furnace inside is provided with furnace body heating area, support is slidably arranged in furnace body heating area, support is provided with multiple load-bearing mechanisms distributed along the up and down direction, load-bearing mechanism includes support plate, stop lever and two mutually parallel mounting rods, support plate is used to support tungsten molybdenum slab, two mounting rods are connected by connecting rod, the both ends of stop lever are connected with two mounting rods, support plate is slidably arranged on mounting rod, and support plate and stop lever abut, mounting rod, support plate and stop lever jointly form the limiting area for limiting tungsten molybdenum slab, the side of support plate towards furnace door is provided with notch and limiting assembly, notch is used to provide clamping space to clamp tungsten molybdenum slab for clamp, limiting assembly is used to limit tungsten molybdenum slab.The present application can avoid damaging tungsten molybdenum slab when loading and unloading tungsten molybdenum slab.

Description

Technical Field

[0001] This utility model relates to the field of vacuum sintering technology for tungsten-molybdenum plates, specifically to a vacuum sintering device. Background Technology

[0002] Tungsten-molybdenum plates are typically made from tungsten powder and molybdenum powder using powder metallurgy. First, the powder is pressed into tungsten-molybdenum plate blanks by molding or cold isostatic pressing, then densified by high-temperature sintering, and finally processed into finished products.

[0003] In the existing technology, horizontal vacuum sintering furnaces are often used for high-temperature sintering of tungsten and molybdenum slabs. The specific process is as follows: open the furnace door and push out the material rack, place the tungsten and molybdenum slab on the material rack, and then push the material rack into the furnace heating zone; after closing the furnace door, evacuate and heat up; after sintering is completed, remove the material rack and take off the formed slab.

[0004] The material racks of horizontal vacuum sintering furnaces are mostly multi-layered frame structures, with each layer equipped with a material feeding base. To prevent the tungsten-molybdenum slabs from shifting due to slight collisions or placement misalignments during manual or robotic loading, which could affect sintering quality, shallow grooves are usually cut into the surface of the base. However, the shallow grooves are designed to be enclosed on all four sides, requiring clamps to be inserted from the side to grip the slabs, which can easily cause scratches and damage to the slabs. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a vacuum sintering device that can prevent damage to tungsten-molybdenum slabs during loading and unloading.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a vacuum sintering equipment, including a sintering furnace and a vacuum system for providing a vacuum environment to the sintering furnace. The sintering furnace is provided with a furnace door, and a furnace body heating zone is provided inside the sintering furnace. A support is slidably arranged in the furnace body heating zone. Multiple bearing mechanisms distributed in the vertical direction are provided on the support. The bearing mechanism includes a support plate, a stop bar, and two parallel mounting rods. The support plate is used to support the tungsten-molybdenum slab. The two mounting rods are connected by a connecting rod. The two ends of the stop bar are correspondingly connected to the two mounting rods. The support plate is slidably arranged on the mounting rods, and the support plate abuts against the stop bar. The mounting rod, support plate, and stop bar together form a limiting area for limiting the tungsten-molybdenum slab. A notch and a limiting component are provided on the side of the support plate facing the furnace door. The notch is used to provide clamping space for the clamping fixture holding the tungsten-molybdenum slab, and the limiting component is used to limit the tungsten-molybdenum slab.

[0007] As a further optimization of the vacuum sintering equipment of the utility model: the limiting component includes a mounting plate disposed at the bottom of the support plate and an insertion hole disposed at the end of the support plate. A sliding shaft is slidably mounted on the mounting plate, and the position of the sliding shaft can be fixed. A limiting ring is provided at the end of the sliding shaft near the furnace door, and a plug that can be inserted into the insertion hole is provided on the limiting ring.

[0008] As a further optimization of the vacuum sintering equipment of the utility model: an anti-detachment block is provided at the other end of the sliding shaft. When the anti-detachment block is in contact with the mounting plate, the insertion block leaves the insertion hole.

[0009] As a further optimization of the vacuum sintering equipment of the utility model: the two mounting rods of the bearing mechanism are connected by multiple reinforcing ribs, which are used to support the support plate.

[0010] As a further optimization of the vacuum sintering equipment of the utility model: the support plate is provided with multiple air vents.

[0011] As a further optimization of the vacuum sintering equipment of the utility model: the mounting rod is provided with a mounting groove extending along the length of the mounting rod, the mounting groove is used to limit the support plate, and the support plate is slidably disposed in the mounting groove.

[0012] As a further optimization of the vacuum sintering equipment of the utility model: the furnace heating zone is provided with two fixed blocks, and the fixed blocks are provided with a sliding groove extending along the feeding direction of the tungsten-molybdenum slab. The support includes a slider that is slidably disposed in the sliding groove.

[0013] As a further optimization of the vacuum sintering equipment of the utility model: the slide is set as a dovetail groove, and the slider is set as a dovetail block that cooperates with the dovetail groove.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: 1) The mounting rod, support plate and stop bar of this utility model together form a limiting area for limiting the tungsten molybdenum slab. The support plate has a notch on the side facing the furnace door. The notch is used to provide clamping space for the clamping fixture to hold the tungsten molybdenum slab. When loading and unloading the tungsten molybdenum slab, the tungsten molybdenum slab above the notch does not have a support plate at the bottom. Therefore, the clamp can place the tungsten molybdenum slab on the support plate stably, avoiding damage to the surface of the tungsten molybdenum slab.

[0015] 2) During the movement of the limiting ring of this utility model, the sliding shaft will slide so that the insert block leaves the insertion hole; however, after the sliding shaft slides a certain distance, the positional relationship between it and the mounting plate is fixed. At this time, if the limiting ring is pulled further, the sliding shaft will drive the mounting plate to move together; during the movement of the mounting plate, the support plate will move together; since the insert block leaves the insertion hole, the sliding shaft is connected to the position of the limiting ring near the bottom. Under the action of gravity, the limiting ring will rotate, changing from the initial state of being higher than the support plate to the state of being lower than the support plate. At this time, the limiting ring no longer limits the tungsten molybdenum slab blank, and the tungsten molybdenum slab blank can be loaded and unloaded normally. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the interior of the sintering furnace; Figure 3 This is a schematic diagram showing the assembly of the bracket, mounting rod, stop bar, and support plate. Figure 4 This is a schematic diagram showing the location of the plug in the socket; Figure 5 This is a diagram showing the plug leaving the socket; Figure 6 This is a schematic diagram of the support plate and the limiting ring; The markings in the diagram are: 1. Sintering furnace, 2. Vacuum system, 3. Furnace body heating zone, 4. Furnace door, 5. Bracket, 6. Slider, 7. Mounting rod, 8. Support plate, 9. Notch, 10. Mounting groove, 11. Stop bar, 12. Vent hole, 13. Limiting ring, 14. Mounting plate, 15. Reinforcing rib, 16. Insertion hole, 17. Insertion block, 18. Sliding shaft, 19. Anti-detachment block, 20. Fixing block. Detailed Implementation

[0017] The technical solution of this utility model will be further described in detail below with reference to specific embodiments. Parts not described or disclosed in detail in the following embodiments of this utility model should be understood as prior art known or should be known by those skilled in the art.

[0018] like Figure 1As shown, a vacuum sintering apparatus includes a sintering furnace 1 and a vacuum system 2 for providing a vacuum environment to the sintering furnace 1. The sintering furnace 1 is equipped with a furnace door 4, and a furnace body heating zone 3 is provided inside the sintering furnace 1. The vacuum system 2 includes a vacuum pump group, vacuum valves, and vacuum measuring instruments. The vacuum pump group includes a mechanical pump and a diffusion pump, which is used to extract air from the sintering furnace 1 to maintain the vacuum level required for sintering. The vacuum valves control the opening and closing of the vacuum passage, working in conjunction with the vacuum pumps to achieve vacuuming and pressure holding. The vacuum measuring instruments monitor the vacuum level inside the furnace in real time to ensure that it meets the process requirements. The vacuum system 2 is conventional prior art in the field and will not be described in detail here. The furnace body heating zone 3 of the sintering furnace 1 provides a high-temperature heat source for sintering, such as a molybdenum wire heater or a graphite heater. Molybdenum wire heaters and graphite heaters are both conventional prior art in the field and will not be described in detail here.

[0019] like Figure 2 As shown, a support 5 is slidably arranged in the furnace heating zone 3. The support 5 is provided with multiple load-bearing mechanisms distributed in the vertical direction. The load-bearing mechanism includes a support plate 8, a stop bar 11, and two parallel mounting rods 7. The support plate 8 is used to support the tungsten-molybdenum slab. The two mounting rods 7 are connected by a connecting rod. The two ends of the stop bar 11 are connected to the two mounting rods 7 respectively. The support plate 8 is slidably arranged on the mounting rods 7 and abuts against the stop bar 11. The mounting rods 7, support plate 8, and stop bar 11 together form a limiting area for limiting the tungsten-molybdenum slab. The support plate 8 is provided with a notch 9 and a limiting component on the side facing the furnace door 4. The notch 9 is used to provide clamping space to the clamp for holding the tungsten-molybdenum slab, and the limiting component is used to limit the tungsten-molybdenum slab.

[0020] When the tungsten-molybdenum slab to be sintered needs to be mounted on the support plate 8, the notch 9 on the support plate 8 provides clamping space for the fixture. Specifically, when placing the tungsten-molybdenum slab, the tungsten-molybdenum slab above the notch 9 does not have the support plate 8 underneath, so the fixture can place the tungsten-molybdenum slab stably on the support plate 8, avoiding damage to the surface of the tungsten-molybdenum slab. When removing the sintered tungsten-molybdenum slab from the support plate 8, the operation of the fixture is the same as the aforementioned process, and will not be described in detail here. The fixture for clamping the tungsten-molybdenum slab is conventional prior art in this field, and will not be described in detail here.

[0021] like Figure 3 As shown, to ensure that the tungsten-molybdenum slab is not easily damaged during loading and unloading, and to limit its movement, the bearing mechanism of this embodiment is equipped with a stop bar 11 and two mounting rods 7. The two mounting rods 7 are parallel to each other, and the two ends of the stop bar 11 are connected to the two mounting rods 7 respectively. The stop bar 11 and the mounting rods 7 together enclose a U-shaped limiting area. After the tungsten-molybdenum slab is placed in the limiting area, the three edges of the tungsten-molybdenum slab are limited, except for one side located at the notch 9. Therefore, as Figure 3As shown, a limiting component is installed at the notch 9 on the support plate 8. This is to avoid affecting the placement of the tungsten-molybdenum slab in the fixture, as... Figure 4 and Figure 5 As shown, the limiting component of this embodiment includes a mounting plate 14 disposed at the bottom of the support plate 8 and an insertion hole 16 disposed at the end of the support plate 8. A sliding shaft 18 is movably passed through the mounting plate 14, and the position of the sliding shaft 18 can be fixed. A limiting ring 13 is provided at one end of the sliding shaft 18 near the furnace door 4, and an insertion block 17 that can be inserted into the insertion hole 16 is provided on the limiting ring 13.

[0022] When it is necessary to pull the support plate 8 toward the furnace door 4 to load and unload the tungsten-molybdenum slab, the limiting ring 13 can be pulled. During the movement of the limiting ring 13, the sliding shaft 18 will slide, causing the insert 17 to leave the insertion hole 16. However, after the sliding shaft 18 slides a certain distance, the positional relationship between it and the mounting plate 14 becomes fixed. At this time, if the limiting ring 13 is pulled again, the sliding shaft 18 will move the mounting plate 14 together. During the movement of the mounting plate 14, the support plate 8 will move together until it reaches the appropriate position for loading and unloading the tungsten-molybdenum slab. In addition, since the insert 17 leaves the insertion hole 16, if... Figure 5 As shown, the sliding shaft 18 is connected to the limiting ring 13 near the bottom. Under the action of gravity, the limiting ring 13 will rotate, changing from its initial state above the support plate 8 to its state below the support plate 8. At this time, the limiting ring 13 no longer limits the tungsten-molybdenum slab, and the tungsten-molybdenum slab can be loaded and unloaded normally. It can be seen that the limiting ring 13 has two functions: limiting and facilitating pulling. Figure 5 It only shows the instantaneous state of the plug 17 leaving the socket 16.

[0023] When the support plate 8 needs to be abutted against the stop bar 11, simply rotate the limiting ring 13 to insert the insert block 17 on the limiting ring 13 into the insertion hole 16, and then push the limiting ring 13 to drive the support plate 8 to move synchronously. Due to the cooperation between the insert block 17 and the insertion hole 16, the limiting ring 13 will not rotate.

[0024] To ensure the fixed position of the sliding shaft 18, an anti-detachment block 19 is provided at the other end of the sliding shaft 18. When the anti-detachment block 19 is in contact with the mounting plate 14, the insertion block 17 leaves the insertion hole 16. When the sliding shaft 18 is pulled, and the anti-detachment block 19 on the sliding shaft 18 moves to be in contact with the mounting plate 14, the sliding shaft 18 can no longer move on the mounting plate 14, but moves together with the mounting plate 14.

[0025] To improve the load-bearing capacity of the mounting rods 7 of the load-bearing mechanism, the two mounting rods 7 are connected by multiple reinforcing ribs 15, which support the support plate 8. For clarity, Figure 6The diagram shows the support of the reinforcing rib 15 to the support plate 8, but the connection between the reinforcing rib 15 and the mounting rod 7 is not shown. The support plate 8 has multiple ventilation holes 12 to improve air circulation. To further enhance the performance of the reinforcing rib 15, the surface of the reinforcing rib 15 in contact with the support plate 8 has multiple hemispherical protrusions, and the bottom of the support plate 8 has corresponding recesses that mate with the hemispherical protrusions.

[0026] To ensure a stable fit between the support plate 8 and the mounting rod 7, a mounting groove 10 extending along the length of the mounting rod 7 is provided on the mounting rod 7. The mounting groove 10 is used to limit the position of the support plate 8, and the support plate 8 is slidably disposed in the mounting groove 10. The portion of the support plate 8 that slides in the mounting groove 10 is in contact with the inner wall of the mounting groove 10.

[0027] The furnace heating zone 3 is provided with two fixed blocks 20. The fixed blocks 20 are provided with grooves extending along the feeding direction of the tungsten-molybdenum slab. The support 5 includes a slider 6 that is slidably disposed in the groove. In order to improve the stability of the slider 6 in the groove, the groove is set as a dovetail groove, and the slider 6 is set as a dovetail block that cooperates with the dovetail groove.

[0028] In this embodiment, as Figure 2 and Figure 3 As shown, bracket 5 is configured as two parallel U-shaped frames, with the aforementioned dovetail blocks at the bottom of the U-shaped frames. For ease of description, [the following is omitted as it is not directly related to the bracket configuration]. Figure 3 The U-shaped frame on the left is called frame A, and the U-shaped frame on the right is called frame B. The two mounting rods 7 of the load-bearing mechanism cooperate with frame A and frame B respectively. Specifically, one mounting rod 7 has its two ends connected to the two sides of frame A, and the other mounting rod 7 has its two ends connected to frame B. There are three load-bearing mechanisms, evenly distributed along the vertical direction.

[0029] Among them, the fixing block 20, the slider 6, the bearing mechanism, the support plate 8, the limiting ring 13, the mounting plate 14, the reinforcing rib 15, the insert block 17, the sliding shaft 18, and the anti-detachment block 19 are all made of materials that meet the requirements of vacuum sintering of tungsten and molybdenum slabs, which are conventional existing technologies in this field, such as molybdenum and molybdenum alloys, and will not be described in detail here.

[0030] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A vacuum sintering apparatus, comprising a sintering furnace (1) and a vacuum system (2) for providing a vacuum environment to the sintering furnace (1), wherein the sintering furnace (1) is provided with a furnace door (4), and a furnace body heating zone (3) is provided inside the sintering furnace (1), characterized in that: A bracket (5) is slidably arranged in the furnace heating zone (3). Multiple load-bearing mechanisms are arranged on the bracket (5) in the vertical direction. The load-bearing mechanism includes a support plate (8), a stop bar (11) and two parallel mounting rods (7). The support plate (8) is used to support the tungsten molybdenum slab. The two mounting rods (7) are connected by a connecting rod. The two ends of the stop bar (11) are connected to the two mounting rods (7). The support plate (8) is slidably arranged on the mounting rod (7) and abuts against the stop bar (11). The mounting rod (7), support plate (8) and stop bar (11) together form a limiting area for limiting the tungsten molybdenum slab. The support plate (8) is provided with a notch (9) and a limiting component on the side facing the furnace door (4). The notch (9) is used to provide clamping space to the clamp for holding the tungsten molybdenum slab. The limiting component is used to limit the tungsten molybdenum slab.

2. The vacuum sintering equipment as described in claim 1, characterized in that: The limiting component includes a mounting plate (14) disposed at the bottom of the support plate (8) and an insertion hole (16) disposed at the end of the support plate (8). A sliding shaft (18) is slidably mounted on the mounting plate (14), and the position of the sliding shaft (18) can be fixed. A limiting ring (13) is provided at one end of the sliding shaft (18) near the furnace door (4), and a plug (17) that can be inserted into the insertion hole (16) is provided on the limiting ring (13).

3. The vacuum sintering equipment as described in claim 2, characterized in that: The other end of the sliding shaft (18) is provided with an anti-detachment block (19). When the anti-detachment block (19) is in contact with the mounting plate (14), the insertion block (17) leaves the insertion hole (16).

4. The vacuum sintering equipment as described in claim 1, characterized in that: The two mounting rods (7) of the bearing mechanism are connected by a plurality of reinforcing ribs (15), which are used to support the support plate (8).

5. The vacuum sintering equipment as described in claim 1, characterized in that: The support plate (8) is provided with multiple ventilation holes (12).

6. The vacuum sintering equipment as described in claim 1, characterized in that: The mounting rod (7) has a mounting groove (10) extending along the length of the mounting rod (7). The mounting groove (10) is used to limit the position of the support plate (8). The support plate (8) is slidably disposed in the mounting groove (10).

7. The vacuum sintering equipment as described in claim 1, characterized in that: The furnace heating zone (3) is provided with two fixed blocks (20), and the fixed blocks (20) are provided with a sliding groove extending along the feeding direction of the tungsten molybdenum slab. The bracket (5) includes a slider (6) that is slidably disposed in the sliding groove.

8. The vacuum sintering equipment as described in claim 7, characterized in that: The groove is configured as a dovetail groove, and the slider (6) is configured as a dovetail block that cooperates with the dovetail groove.

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