CN219852129U - Thermal degreasing auxiliary device for titanium alloy hollow node ball - Google Patents
Thermal degreasing auxiliary device for titanium alloy hollow node ball Download PDFInfo
- Publication number
- CN219852129U CN219852129U CN202320627852.8U CN202320627852U CN219852129U CN 219852129 U CN219852129 U CN 219852129U CN 202320627852 U CN202320627852 U CN 202320627852U CN 219852129 U CN219852129 U CN 219852129U
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- CN
- China
- Prior art keywords
- hollow node
- node ball
- thermal degreasing
- device body
- titanium alloy
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- 238000005238 degreasing Methods 0.000 title claims abstract description 39
- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 21
- 230000008093 supporting effect Effects 0.000 claims abstract description 27
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 230000005484 gravity Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 10
- 239000003795 chemical substances by application Substances 0.000 description 5
- 238000005245 sintering Methods 0.000 description 5
- 238000001746 injection moulding Methods 0.000 description 4
- 238000003754 machining Methods 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model provides a thermal degreasing auxiliary device for a titanium alloy hollow node ball, which utilizes the characteristic that the curvature of a device body with a multi-curved surface structure is consistent with that of the hollow node ball, can enable the outer surface of the hollow node ball to be fully contacted with the device body, provides supporting force for the hollow node ball, prevents the hollow node ball from being degreased and deformed and even collapsed only under the action of gravity, and ensures the dimensional accuracy of the hollow node ball.
Description
Technical Field
The utility model relates to the technical field of thermal degreasing auxiliary devices, in particular to a thermal degreasing auxiliary device for a titanium alloy hollow node ball.
Background
The large space truss structure is formed by connecting one-dimensional rods in a three-dimensional space through truss joints, and can effectively improve the bearing capacity, so that the large space truss structure is widely used for designing satellites and spacecrafts. The titanium alloy hollow node ball is used as a complex multidirectional structural member joint of a space truss, and is one of truss joints with the best application prospect at present due to light weight, high specific strength, high efficiency, safety and stability. However, because the internal structure of the node ball is complex and multidirectional, the space angle between adjacent rod pieces of the node is changed more, and each hole line of the spherical surface is distributed through the center of the sphere, the traditional machining method can generate serious repeated positioning errors due to repeated clamping, so that the quality of the node ball is difficult to ensure. In addition, the titanium alloy material has poor machining performance and high machining cost, and further limits the application of the machining technology to the titanium alloy hollow node ball.
The metal powder injection molding technology (MIM) combines the modern plastic injection molding technology with powder metallurgy, can directly prepare three-dimensional complex products, has the advantages of high material utilization rate, easiness in mass production and the like, and provides a new idea for manufacturing titanium alloy hollow node balls. Because the node ball has a complex structure and high mold design difficulty, in order to improve the yield of injection blanks, an injection molding scheme of a node hemisphere is generally adopted, and then a complete hollow node ball part is finally prepared through degreasing and merging and sintering of two node hemispheres. However, in the actual thermal degreasing process, the high molecular polymer such as high density polyethylene and ethylene-vinyl acetate copolymer with skeleton function can be completely decomposed at about 500 ℃, and the pre-sintering temperature of the titanium powder exceeds 800 ℃, so that the hollow structure of the node hemispheres is easy to generate degreasing deformation and even collapse under the action of self gravity in the temperature range of 500-800 ℃. In addition, the deformation reserved in the thermal degreasing process can further aggravate torque deformation in the sintering process, so that the size of a product is greatly error, and the finished product rate of a finished product is reduced.
Disclosure of Invention
In order to overcome the defects in the prior art, the main purpose of the utility model is to provide a thermal degreasing auxiliary device for a titanium alloy hollow node ball.
In order to achieve the above purpose, the utility model provides a thermal degreasing auxiliary device for a titanium alloy hollow node ball formed by metal injection.
The thermal degreasing auxiliary device for the titanium alloy hollow node ball by metal injection molding comprises:
the device body is in a bowl shape with two open ends and is used for placing the hollow node ball; the device body has the same curvature as the hollow node ball, and a plurality of holes are formed in the side wall of the device body;
and one end of the supporting structure is detachably connected with the side wall of the device body, and the other end of the supporting structure is a free end.
Further, the device body is of a multi-curved-surface structure formed by adopting a metal net.
Further, the diameter of the upper end opening of the device body is matched with the sphere diameter of the hollow node sphere.
Further, the diameter of the upper end opening of the device body is larger than the diameter of the lower end opening of the device body.
Further, the supporting structure comprises a plurality of supporting rods, one ends of the supporting rods are detachably connected with the side wall of the device body, and the other ends of the supporting rods are free ends.
Further, the plurality of support rods are uniformly distributed along the circumferential direction.
Further, the number of the support rods is 4.
Further, the included angle between one end of the supporting rod connected to the device body and the horizontal plane is 30-45 degrees.
Further, the support rod is detachably connected to the upper end opening of the device body.
Further, the metal mesh comprises, but is not limited to, titanium alloy and stainless steel.
The utility model has the beneficial effects that:
1. the device body and the hollow node ball of utilizing many curved surface structures's device body and the unanimous characteristics of hollow node ball camber can make the surface and the device body abundant contact, provides holding power for hollow node ball, prevents that hollow node ball from only receiving the degreasing deformation that the action of gravity leads to, collapses even, has guaranteed the dimensional accuracy of hollow node ball.
2. The device body provides supporting force for the hollow node ball, and meanwhile, the framework agent decomposition products close to the contact surface can diffuse outwards through holes (grids of the metal mesh) on the device body, so that the framework agent products cannot remain in the hollow node ball to deteriorate the performance of the material.
3. Through the fixing function of the supporting structure, the hollow node ball can always keep a horizontal state in the thermal degreasing process, and the partial deformation caused by the loss of supporting force on part of the outer surface of the hollow node ball due to inclination is prevented.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
FIG. 1 is a schematic view of a prior art titanium alloy hollow node ball;
fig. 2 is a schematic structural view of a thermal degreasing auxiliary apparatus for a titanium alloy hollow node ball according to an embodiment of the present utility model.
In the figure:
1. a device body; 2. and (5) supporting the rod.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
According to the specific embodiment of the utility model, a thermal degreasing auxiliary device for the titanium alloy hollow node ball is provided, and is mainly used for assisting the hollow node ball in the thermal degreasing process in a sintering furnace. Wherein fig. 1 shows a schematic structural view of a titanium alloy hollow node ball.
As shown in fig. 2, the thermal degreasing auxiliary device for titanium alloy hollow node balls comprises a device body 1, wherein the device body 1 is in a bowl shape with two open ends and is used for placing the hollow node balls; the diameter of the upper opening of the device body 1 is larger than that of the lower opening of the device body 1, the diameter of the upper opening of the device body 1 is matched with the spherical diameter of the hollow node ball, and the device body 1 has the same curvature as the hollow node ball so as to ensure full contact with the hollow node ball and provide a supporting function for the hollow node ball; the side wall of the device body 1 is provided with a plurality of holes, and in use, the framework agent decomposition products can be fully diffused outwards through the holes and the bottom opening of the device body 1; the thermal degreasing auxiliary apparatus further comprises a supporting structure formed to support the apparatus body 1 such that the hollow node ball is maintained in a horizontal state during thermal degreasing; specifically, one end of the supporting structure is detachably connected to the side wall of the device body 1, and the other end is a free end, and the free end can be abutted against the bottom surface or connected to other matched structures.
As an embodiment of the present utility model, the device body 1 is a multi-curved structure formed by using a metal mesh, which has a curvature consistent with that of a hollow node sphere, and the decomposition products of the skeleton agent can be sufficiently diffused outward along the mesh of the metal mesh.
In the embodiment of the utility model, the material of the metal mesh comprises but is not limited to titanium alloy, stainless steel, and the metal mesh can be prepared by selecting the material of the titanium alloy, the stainless steel and the like according to the powder pre-sintering temperature.
As an embodiment of the present utility model, the support structure includes a plurality of support rods 2, wherein one ends of the support rods 2 are detachably connected to the side wall of the device body 1, and the other ends are free ends.
The design of a plurality of bracing pieces 2 can maintain the hollow node ball in the horizontal state of thermal degreasing in-process, prevents that hollow node ball slope from leading to holding power inefficacy, local deformation.
In the embodiment of the present utility model, the plurality of support rods 2 are uniformly distributed along the circumferential direction of the apparatus body 1 to ensure an optimal supporting effect.
As a specific embodiment, the support bars 2 may be provided with 4, 4 support bars 2 being distributed at 90 ° intervals.
In the embodiment of the utility model, the included angle between one end of the supporting rod 2 connected to the device body 1 and the horizontal plane is 30-45 degrees.
In the embodiment of the present utility model, the support bar 2 is detachably connected to the upper end opening of the device body 1.
It is worth mentioning that the quantity and the distribution mode of the supporting rods 2, the included angle between the supporting rods 2 and the horizontal plane, the connection position with the device body 1 and the like can be correspondingly adjusted according to actual needs, and the purpose is to keep the hollow node ball horizontal in the thermal degreasing process and prevent the supporting force failure and local deformation caused by the inclination of the node ball.
The working principle of the thermal degreasing auxiliary device is as follows:
the multi-curved device body 1 having the same curvature as the hollow node ball can be well fitted with the hollow node ball, and provides a supporting force for the hollow node ball during thermal degreasing to eliminate deformation caused by gravity.
In addition, the supporting structure is adjusted so that the hollow node ball is kept in a horizontal state, and the partial deformation of the hollow node ball caused by the inclination and the protection effect of the partial structure losing the supporting force is prevented.
The use process of the thermal degreasing auxiliary device comprises the following steps:
and loading the hollow node ball degreased green body subjected to catalytic degreasing or solvent degreasing into the device body 1, ensuring that the hollow node ball degreased green body is well attached to the device body 1 (such as a metal net), and adjusting the included angles between the four support rods 2 and the horizontal plane to ensure that the hollow node ball is kept in a horizontal state. Along with the removal of the framework agent in the thermal degreasing process, the supporting force of the device body 1 in the horizontal state on the hollow node ball is counteracted with the gravity, so that the defects of degreasing deformation, collapse and the like are avoided.
The present utility model is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.
Claims (10)
1. A thermal degreasing assistance apparatus for a titanium alloy hollow node ball, comprising:
the device body is in a bowl shape with two open ends and is used for placing the hollow node ball; the device body has the same curvature as the hollow node ball, and a plurality of holes are formed in the side wall of the device body;
and one end of the supporting structure is detachably connected with the side wall of the device body, and the other end of the supporting structure is a free end.
2. The thermal degreasing auxiliary device of claim 1, wherein the device body is a multi-curved structure formed by using a metal mesh.
3. The thermal degreasing auxiliary apparatus of claim 1, wherein a diameter of the upper end opening of the apparatus body is adapted to a spherical diameter of the hollow node ball.
4. A thermal degreasing assistance apparatus as claimed in claim 1 or 3, wherein the diameter of the upper end opening of the apparatus body is greater than the diameter of the lower end opening of the apparatus body.
5. The thermal degreasing assistance apparatus of claim 1, wherein the support structure comprises a plurality of support rods, each of which has one end detachably connected to a side wall of the apparatus body and the other end being a free end.
6. The thermal degreasing assistance apparatus of claim 5, wherein the plurality of support rods are uniformly distributed in the circumferential direction.
7. The thermal degreasing auxiliary apparatus as claimed in claim 5 or 6, wherein the support rods are provided in 4.
8. The thermal degreasing auxiliary apparatus of claim 5, wherein an angle between an end of the supporting rod connected to the apparatus body and a horizontal plane is 30-45 °.
9. The thermal degreasing assistance apparatus as claimed in claim 5 or 8, wherein the support bar is detachably connected to the apparatus body at an upper end opening thereof.
10. The thermal degreasing aid of claim 2, wherein the mesh comprises a material including, but not limited to, titanium alloy, stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320627852.8U CN219852129U (en) | 2023-03-24 | 2023-03-24 | Thermal degreasing auxiliary device for titanium alloy hollow node ball |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320627852.8U CN219852129U (en) | 2023-03-24 | 2023-03-24 | Thermal degreasing auxiliary device for titanium alloy hollow node ball |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219852129U true CN219852129U (en) | 2023-10-20 |
Family
ID=88337358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320627852.8U Active CN219852129U (en) | 2023-03-24 | 2023-03-24 | Thermal degreasing auxiliary device for titanium alloy hollow node ball |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219852129U (en) |
-
2023
- 2023-03-24 CN CN202320627852.8U patent/CN219852129U/en active Active
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