Device for preventing spark plasma sintering equipment from generating pressure on sintered object

Abstract

The invention relates to a device for preventing spark plasma sintering equipment from generating pressure on a sintered object, the device comprises an upper copper bar assembly and a lower copper bar assembly, the upper copper bar assembly is provided with an upper copper bar extension pipe connecting structure, and the lower copper bar assembly is provided with a lower copper bar extension pipe connecting structure. The upper copper bar extension pipe connecting structure is stably connected with the extension pipe located on the right side, the lower copper bar extension pipe connecting structure is stably connected with the extension pipe located on the left side, the extension pipes are provided with adjustable structures, and the adjustable structures are provided with a plurality of notches and have certain deformability. The connecting ends at the two ends of a sintering object can be inserted into the adjustable structures of the extension pipes located on the left side and the right side of the sintering object correspondingly and are stably connected through the extension pipe chucks. Radial pressure is applied to the extension pipe through the extension pipe chuck, so that the extension pipe is connected with the sintering object, and pressure is prevented from being applied to the sintering object.

Description

Technical Field

[0001] The invention belongs to the field of spark plasma sintering equipment, and in particular relates to a device for preventing spark plasma sintering equipment from generating pressure on a sintering object. Background Art

[0002] The structures of the spark plasma sintering equipment currently available on the market are roughly the same: a columnar electrode is set for each positive and negative pole. During sintering, the electrodes move closer to each other along the axial direction, applying pressure to the mold placed between the electrodes, thereby transferring electrical energy and pressure to the mold. Spark plasma sintering has the characteristic of sintering during the pressurized process. However, if we want the sintering object not to be under pressure when the equipment is working, such as when the sintering object is porous metal or other structures and materials that cannot withstand pressure, the common spark plasma sintering equipment on the market cannot meet the needs. Therefore, it is necessary to design a device to prevent the spark plasma sintering equipment from exerting pressure on the sintering object. Summary of the invention

[0003] In view of this, an object of the present invention is to provide a device for preventing spark plasma sintering equipment from exerting pressure on a sintering object.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] A device for preventing spark plasma sintering equipment from exerting pressure on a sintering object, comprising an upper copper bar assembly and a lower copper bar assembly;

[0006] The upper copper bar assembly includes a soft copper bar of the upper copper bar assembly, one end of the soft copper bar of the upper copper bar assembly is provided with an upper copper bar electrode connection structure, and the other end of the soft copper bar of the upper copper bar assembly is provided with an upper copper bar extension tube connection structure; the upper copper bar extension tube connection structure is connected to the extension tube, and the upper copper bar extension tube connection structure is provided with multiple notches and has a certain deformation ability, and can be stably connected to the extension tube on the right side by a clamping chuck.

[0007] The lower copper bar assembly includes a lower copper bar assembly soft copper bar, one end of the lower copper bar assembly soft copper bar is provided with a lower copper bar electrode connection structure, and the other end of the lower copper bar assembly soft copper bar is provided with a lower copper bar fixed welding assembly and a lower copper bar detachable welding assembly, which is convenient for loading and unloading when the size of the sintering object is large; one side of the lower copper bar fixed welding assembly is provided with a lower copper bar extension tube left connection structure, and one side of the lower copper bar detachable welding assembly is provided with a lower copper bar extension tube right connection structure, the lower copper bar extension tube left connection structure and the lower copper bar extension tube right connection structure have the same inner diameter to form a lower copper bar extension tube connection structure, and the lower copper bar extension tube connection structure has a certain deformation ability, and can be stably connected to the extension tube located on the left side by pressing the chuck;

[0008] The extension tube is provided with an adjustable structure, which is provided with multiple notches and has a certain deformation ability. The connecting ends at both ends of the sintering object can be respectively inserted into the adjustable structures of the extension tubes on the left and right sides thereof, and stably connected through the extension tube clamp.

[0009] Preferably, the upper copper bar electrode connection structure is connected to the upper electrode of the sintering furnace, and the upper copper bar electrode connection structure is provided with a plurality of notches and has a certain deformation capacity, and can be stably connected to the upper electrode of the sintering furnace through the first clamp;

[0010] The lower copper bar electrode connection structure is connected to the lower electrode of the sintering furnace. The lower copper bar electrode connection structure is provided with a plurality of notches and has a certain deformation capacity, and can be stably connected to the lower electrode of the sintering furnace through a second clamp.

[0011] Preferably, the sintering object is coaxially connected to the extension tubes on the left and right sides.

[0012] Preferably, the sintering object is a metal material.

[0013] Preferably, the sintering object is a porous metal material.

[0014] Preferably, the upper copper bar assembly is also connected to the upper copper bar support plate by bolts to prevent the soft copper bar of the upper copper bar assembly from collapsing; the lower copper bar assembly is also connected to the lower copper bar support plate by bolts to prevent the soft copper bar of the lower copper bar assembly from collapsing.

[0015] Preferably, the clamping chuck is connected to the clamping chuck limit plate by a bolt, so as to limit the left and right positions of the clamping chuck.

[0016] The beneficial effects of the present invention are:

[0017] 1. The present invention provides a device for preventing spark plasma sintering equipment from exerting pressure on a sintering object. The device applies radial pressure to an extension tube through an extension tube chuck, so that the extension tube is connected to the sintering object, thereby avoiding exerting pressure on the sintering object.

[0018] 2. The present invention provides a device for preventing spark plasma sintering equipment from exerting pressure on a sintering object. The extension tube can move left and right to match sintering objects of different sizes.

[0019] 3. The present invention provides a device for preventing spark plasma sintering equipment from exerting pressure on a sintering object. The sintering object is placed horizontally, and a supporting structure can be added to the lower end of the sintering object as required to prevent the sintering object from softening and deforming during the sintering process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is an assembly effect diagram of a device for preventing spark plasma sintering equipment from exerting pressure on a sintering object according to the present invention;

[0021] Figure 2 is a schematic diagram of an upper copper busbar assembly of the present invention;

[0022] Figure 3 is a schematic diagram of a clamping chuck of the present invention;

[0023] Figure 4 is a schematic diagram of an extension tube of the present invention;

[0024] Figure 5 is a schematic diagram of an extension tube chuck of the present invention;

[0025] Figure 6 is a schematic diagram of the lower copper busbar assembly of the present invention;

[0026] Figure 7 is a schematic diagram of a sintering object of the present invention;

[0027] In the figure, 1. upper electrode of sintering furnace; 2. first clamp; 3. upper copper bar assembly; 31. upper copper bar electrode connection structure; 32. upper copper bar assembly soft copper bar; 33. upper copper bar extension tube connection structure; 4. upper copper bar support plate; 5. clamping chuck; 6. clamping chuck limit plate; 7. extension tube; 71. adjustable structure; 8. extension tube chuck; 9. lower copper bar assembly; 91. lower copper bar fixed welding assembly; 92. lower copper bar detachable welding assembly; 93. lower copper bar extension tube left connection structure; 94. lower copper bar extension tube right connection structure; 95. lower copper bar electrode connection structure; 96. lower copper bar assembly soft copper bar; 10. lower copper bar support plate; 11. sintering object; 111. connection end; 12. second clamp; 13. lower electrode of sintering furnace. DETAILED DESCRIPTION

[0028] The preferred embodiments of the present invention will be described in detail below.

[0029] The following is combined with Figure 1-7 This application is described in further detail.

[0030] Reference Figures 1 to 7 As shown, a device for preventing spark plasma sintering equipment from exerting pressure on a sintering object comprises an upper copper bar assembly 3 and a lower copper bar assembly 9; the upper copper bar assembly 3 comprises an upper copper bar assembly soft copper bar 32, one end of the upper copper bar assembly soft copper bar 32 is provided with an upper copper bar electrode connection structure 31, and the other end of the upper copper bar assembly soft copper bar 32 is provided with an upper copper bar extension tube connection structure 33; the upper copper bar extension tube connection structure 33 is connected to the extension tube 7, and the upper copper bar extension tube connection structure 33 is provided with a plurality of notches and has a certain deformation ability, and can be stably connected to the extension tube 7 located on the right side by a clamping chuck 5.

[0031] The lower copper bar assembly 9 includes a lower copper bar assembly soft copper bar 96, one end of which is provided with a lower copper bar electrode connection structure 95, and the other end of which is provided with a lower copper bar fixed welding assembly 91 and a lower copper bar detachable welding assembly 92, which are convenient for loading and unloading when the size of the sintering object is large; a lower copper bar extension tube left connection structure 93 is provided on one side of the lower copper bar fixed welding assembly 91, and a lower copper bar extension tube right connection structure 94 is provided on one side of the lower copper bar detachable welding assembly 92. The lower copper bar extension tube left connection structure 93 and the lower copper bar extension tube right connection structure 94 have the same inner diameter to form a lower copper bar extension tube connection structure, and the lower copper bar extension tube connection structure has a certain deformation ability, and can be stably connected to the extension tube 7 located on the left side by pressing the clamp 5;

[0032] The extension tube 7 is provided with an adjustable structure 71, and the adjustable structure 71 is provided with a plurality of notches, and has a certain deformation ability, and the connection ends 111 at both ends of the sintering object 11 can be respectively inserted into the adjustable structures 71 of the extension tube 7 on the left and right sides thereof, and stably connected through the extension tube chuck 8. The sintering object 11 is coaxially connected to the extension tubes 7 on the left and right sides.

[0033] The upper copper bar electrode connection structure 31 is connected to the upper electrode 1 of the sintering furnace. The upper copper bar electrode connection structure 31 is provided with a plurality of notches and has a certain deformation ability. It can be stably connected to the upper electrode 1 of the sintering furnace through the first clamp 2.

[0034] The lower copper bar electrode connection structure 95 is connected to the lower electrode 13 of the sintering furnace. The lower copper bar electrode connection structure 95 is provided with a plurality of notches and has a certain deformation ability. The lower copper bar electrode connection structure 95 can be stably connected to the lower electrode 13 of the sintering furnace through the second clamp 12.

[0035] The upper copper bar assembly 3 is also connected to the upper copper bar support plate 4 by bolts to prevent the soft copper bar 32 of the upper copper bar assembly from collapsing; the lower copper bar assembly 9 is also connected to the lower copper bar support plate 10 by bolts to prevent the soft copper bar 96 of the lower copper bar assembly from collapsing.

[0036] The clamping chuck 5 is connected to the clamping chuck limit plate 6 by bolts, which can limit the left and right positions of the clamping chuck 5.

[0037] The sintering object 11 is a porous metal material, and the connecting ends 111 on both sides are dense metal materials. The metal includes stainless steel, cobalt-chromium alloy, pure titanium, titanium alloy, tantalum, niobium and tantalum-niobium alloy. The porous metal material is prepared by conventional methods such as powder sintering method and organic template impregnation method, and has been preliminarily sintered and has a certain strength. The sintering object 11 and the connecting ends 111 on both sides are connected by welding or the like.

[0038] When assembling the present invention, before sintering, use a tool to loosen the four clamping chucks 5 and the two extension tube chucks 8, insert the connecting ends 111 at both ends of the sintering object 11 into the adjustable structures 71 of the extension tube 7 located on the left and right sides thereof, and successively tighten the two extension tube chucks 8 and the four clamping chucks 5. After the installation is completed, select appropriate sintering parameters to carry out the sintering work. After sintering, the mechanical strength of the sintering object 11 is improved. The device provided by the present invention can obtain a high-quality sintered body in a relatively short time, avoids applying pressure to the sintering object, and thus avoids destroying the porous structure in the sintering object.

[0039] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A device for preventing spark plasma sintering equipment from exerting pressure on a sintering object, characterized in that: It comprises an upper copper bar assembly (3) and a lower copper bar assembly (9); The upper copper bar assembly (3) comprises an upper copper bar assembly soft copper bar (32); one end of the upper copper bar assembly soft copper bar (32) is provided with an upper copper bar electrode connection structure (31); the other end of the upper copper bar assembly soft copper bar (32) is provided with an upper copper bar extension tube connection structure (33); the upper copper bar extension tube connection structure (33) is connected to the extension tube (7); the upper copper bar extension tube connection structure (33) is provided with a plurality of notches and has a certain deformation capacity, and can be stably connected to the extension tube (7) located on the right side by means of a clamping chuck (5). The lower copper bar assembly (9) comprises a lower copper bar assembly soft copper bar (96), one end of the lower copper bar assembly soft copper bar (96) is provided with a lower copper bar electrode connection structure (95), and the other end of the lower copper bar assembly soft copper bar (96) is provided with a lower copper bar fixed welding assembly (91) and a lower copper bar detachable welding assembly (92), which is convenient for loading and unloading when the size of the sintering object is large; one side of the lower copper bar fixed welding assembly (91) is provided with a lower copper bar extension tube left connection structure (93), and one side of the lower copper bar detachable welding assembly (92) is provided with a lower copper bar extension tube right connection structure (94), the lower copper bar extension tube left connection structure (93) and the lower copper bar extension tube right connection structure (94) have the same inner diameter to form a lower copper bar extension tube connection structure, and the lower copper bar extension tube connection structure has a certain deformation ability, and can be stably connected to the extension tube (7) located on the left side by a clamping chuck (5); The extension tube (7) is provided with an adjustable structure (71), and the adjustable structure (71) is provided with a plurality of notches and has a certain deformation capability, so that the connecting ends (111) at both ends of the sintering object (11) can be respectively inserted into the adjustable structures (71) of the extension tube (7) located on the left and right sides thereof, and stably connected through the extension tube clamp (8).

2. A device for preventing spark plasma sintering equipment from exerting pressure on a sintering object as claimed in claim 1, characterized in that: The upper copper bar electrode connection structure (31) is connected to the upper electrode (1) of the sintering furnace. The upper copper bar electrode connection structure (31) is provided with a plurality of notches and has a certain deformation capability, and can be stably connected to the upper electrode (1) of the sintering furnace through the first clamp (2); The lower copper bar electrode connection structure (95) is connected to the lower electrode (13) of the sintering furnace. The lower copper bar electrode connection structure (95) is provided with a plurality of notches and has a certain deformation capability, and can be stably connected to the lower electrode (13) of the sintering furnace through the second clamp (12).

3. The device for preventing spark plasma sintering equipment from exerting pressure on a sintering object as claimed in claim 1, characterized in that: The sintering object (11) is coaxially connected to the extension pipes (7) on the left and right sides.

4. The device for preventing spark plasma sintering equipment from exerting pressure on a sintering object as claimed in claim 1, characterized in that: The sintering object (11) is a metal material.

5. The device for preventing spark plasma sintering equipment from exerting pressure on a sintering object as claimed in claim 1, characterized in that: The upper copper bar assembly (3) is also connected to the upper copper bar support plate (4) by bolts to prevent the soft copper bar (32) of the upper copper bar assembly from collapsing; the lower copper bar assembly (9) is also connected to the lower copper bar support plate (10) by bolts to prevent the soft copper bar (96) of the lower copper bar assembly from collapsing.

6. The device for preventing spark plasma sintering equipment from exerting pressure on a sintering object as claimed in claim 1, characterized in that: The clamping chuck (5) is connected to the clamping chuck limiting plate (6) via bolts, and the left and right positions of the clamping chuck (5) can be limited.

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