CN210587162U - Mold for preparing refractory metal composite pipe - Google Patents
Mold for preparing refractory metal composite pipe Download PDFInfo
- Publication number
- CN210587162U CN210587162U CN201920894128.5U CN201920894128U CN210587162U CN 210587162 U CN210587162 U CN 210587162U CN 201920894128 U CN201920894128 U CN 201920894128U CN 210587162 U CN210587162 U CN 210587162U
- Authority
- CN
- China
- Prior art keywords
- interior
- refractory metal
- cylinder
- rubber cylinder
- packing element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Powder Metallurgy (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
Abstract
The utility model discloses a mould for compound tubular product preparation of refractory metal, include by interior and the outer interior solid fixed cylinder of establishing of cover in proper order, packing element and outer solid fixed cylinder, packing element includes interior packing element and outer packing element, interior packing element outer wall is pressed close to interior packing element inner wall, outer solid fixed cylinder is pressed close to outer packing element outer wall, form the cavity between outer packing element and the interior packing element, be provided with the mandrel in the cavity, the mandrel is used for providing the size precision of initial internal diameter or external diameter for the tubular product pressed compact, form the shaping die cavity between mandrel and interior packing element or the outer packing element, the die cavity both ends are provided with the end plug. The utility model discloses the mould can realize that the pipe is from outer to interior or from interior to outer successive layer press forming, has improved tubular product size precision simultaneously, has reduced and has reserved the processingquantity, has improved former material powder utilization ratio, not only is suitable for the preparation of refractory metal bilayer or multilayer composite metal tubular product outside, still can be applied to the composite forming of other bilayer or multilayer metal tubular products.
Description
Technical Field
The utility model belongs to the technical field of the compound tubular product of metal, a mould for refractory metal compound tubular product preparation is related to.
Background
The refractory metal and the refractory metal alloy have the advantages of high melting point, high-temperature strength and the like, and are important high-temperature structural materials. The use temperature of refractory metals and their alloys is directly related to their melting points, and molybdenum alloys, tungsten alloys, niobium alloys, and the like are used in many cases. The molybdenum alloy has the defects of low-temperature brittleness, welding brittleness, difficult processing, poor high-temperature oxidation resistance and the like, so that the application range of the molybdenum alloy is limited. Mo-Nb, Mo-W, Mo-Ta and the like are infinite solid solution alloys, and the problems of high-temperature phase transformation, brittleness and the like do not exist, so that the addition of W, Nb and Ta in a certain proportion to Mo is one of effective ways for improving the performance of the molybdenum-based alloy. Meanwhile, a proper amount of second-phase reinforcing particles (rare earth oxide or ceramic phase) are introduced into the refractory metal matrix, and the performance of the refractory metal matrix composite is obviously higher than that of the refractory alloy.
In consideration of the specificity of the requirements on the material properties in practical application, the double-layer or multi-layer pipe can meet the functional realization of refractory metals.
The existing double-layer or multi-layer pipe is generally obtained by sintering after pressure forming, and the pressure forming is carried out after the pipe is assembled. Through the respective certain amount of deformation of the interface areas of the steel pipes, the interface metallurgical bonding of the fresh surfaces of the steel pipes and the fresh surfaces of the steel pipes is realized under the action of higher temperature and higher pressure stress, and the bonding rate is higher. The deformation of the tube cannot be accurately controlled in the pressure forming process, so that the wall thickness, the roundness of the inner hole, the coaxiality of the inner hole and other dimensional deviations of the tube are caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a mould for compound tubular product preparation of refractory metal for the tubular product size deformation that double-deck or multilayer tubular product press forming obtained can not accurate control's problem among the prior art has been solved.
The utility model provides a technical scheme who adopts is, a mould for refractory metal composite pipe preparation, include by interior and outer fixed cylinder of establishing of cover in proper order, packing element and outer fixed cylinder, packing element includes interior packing element and outer packing element, interior packing element inner wall is pressed close to interior fixed cylinder outer wall, outer fixed cylinder inner wall is pressed close to outer packing element outer wall, form the cavity between outer packing element and the interior packing element, be provided with the mandrel in the cavity, the mandrel is used for providing the size precision of initial internal diameter or external diameter for the tubular product pressed compact, form the shaping die cavity between mandrel and interior packing element or the outer packing element, the die cavity both ends are provided with the end plug.
The utility model is also characterized in that,
the core mould is tubular.
The longitudinal section of the outer fixed cylinder is convex.
When the core mold and the inner rubber cylinder form the cavity, the core mold is close to the inner wall of the outer rubber cylinder, and the inner fixing cylinder is provided with an injection hole.
When a molding cavity is formed between the core mold and the outer rubber cylinder, the core mold is close to the outer wall of the inner rubber cylinder, and the outer fixing cylinder is provided with an injection hole.
The injection hole is positioned at the position of the cavity.
The diameter of the injection hole is 10-15 mm.
One side of the end plug, which is close to the core mold, is provided with a sunken table top, and the core mold is positioned on the sunken table top.
The height of the end plug is 40-100 mm; the thickness of the inner rubber cylinder and the thickness of the outer rubber cylinder are both 5-10 mm.
The thickness of the inner fixing cylinder and the thickness of the outer fixing cylinder are both 5-10 mm.
The beneficial effects of the utility model are that, the utility model discloses a rigidity mandrel for pipe inner wall or outer wall size precision are high, directly through substrate pipe location, have realized that the pipe is from outer extremely interior or from interior extremely outer successive layer suppression shaping, and the size and the form and position tolerance of the tubular product of obtaining are compared skew little before sintering. Meanwhile, the size precision of the pipe is improved, the reserved processing amount is reduced, and the utilization rate of raw material powder is improved. The utility model discloses the mould not only is suitable for the preparation of refractory metal bilayer or multilayer composite metal tubular product, still can be applied to the compound shaping of other bilayer or multilayer metal tubular products.
Drawings
Fig. 1 is a schematic structural view of the isostatic pressing forming mold of the present invention.
In the figure, 1-1 is an upper end plug, 1-2 is a lower end plug, 2 is a core mould, 3 is a core blank, 4 is a cavity, 5 is an outer rubber cylinder, 6 is an outer fixing cylinder, 7 is an inner rubber cylinder, and 8 is an inner fixing cylinder.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The utility model relates to a mould for compound tubular product preparation of refractory metal, its structure is as shown in figure 1, include by interior and outer in proper order the cover establish interior solid fixed cylinder 8, interior rubber tube 7, outer rubber tube 5 and outer solid fixed cylinder 6, interior rubber tube 7 inner wall presses close to interior solid fixed cylinder 8 outer wall, outer solid fixed cylinder 6 inner wall is pressed close to outer rubber tube 5 outer wall, the cavity that forms between outer rubber tube 5 and the interior rubber tube 7, be provided with mandrel 2 in the cavity, mandrel 2 is used for providing the size precision of initial internal diameter or external diameter for the tubular product pressed compact, form die cavity 4 between mandrel 2 and interior rubber tube 7 or the outer rubber tube 5, 4 both ends in die cavity are provided with end plug 1-1 respectively and lower end plug 1-2, form sealed die cavity.
The core mould 2 is tubular and the surface of the tubular body is smooth.
When the core die 2 provides an initial outer diameter dimension for the pipe blank, the core die 2 is close to the outer rubber tube 5, a cavity 4 is formed between the core die 2 and the inner rubber tube 7, an injection hole for injecting a cold isostatic pressing medium between the inner fixing tube 8 and the inner rubber tube 7 is formed in the inner fixing tube 8, and the injection hole is located at the position of the forming cavity. The outer wall of the tube blank obtained by pressing is high in dimensional accuracy, the tube blank can be pressed and formed layer by layer from outside to inside directly through the positioning of the outer wall of the base material tube, and the sizes of the upper end plug 1-1, the lower end plug 1-2, the inner rubber cylinder 7 and the inner fixing cylinder 8 in the layer by layer pressing and forming process need to be changed by matching with the core mold 2 and other structures according to the sizes of different structural layers of the tube.
When the core die 2 provides an initial inner diameter size for the pipe blank, the core die 2 is close to the inner rubber tube 7, a cavity 4 is formed between the core die 2 and the outer rubber tube 5, an injection hole for injecting a cold isostatic pressing medium between the outer fixing tube 6 and the outer rubber tube 5 is formed in the outer fixing tube 6, and the injection hole is located at the position of the forming cavity. The inner wall of the tube blank obtained by pressing is high in dimensional accuracy, the tube blank can be pressed and formed layer by layer from inside to outside by directly positioning through the inner wall of the base material tube, and the sizes of the upper end plug 1-1, the lower end plug 1-2, the outer rubber cylinder 5 and the outer fixing cylinder 6 in the layer by layer pressing and forming process need to be changed by matching with the core mold 2 and other structures according to the sizes of different structural layers of the tube.
Wherein the core mould 2, the inner fixed cylinder 8 and the outer fixed cylinder 6 are all rigid moulds.
The outer fixed cylinder 6 is a convex cylinder, the thickness of the cylinder body is consistent, namely, the longitudinal section is convex, and the diameter of the cylinder body close to the lower end is larger than that of the rest part of the cylinder body. The bottom of the convex cylinder is guaranteed to be level with the bottoms of the outer rubber cylinder 5, the inner fixing cylinder 8 and the inner rubber cylinder 7, and the rubber cylinder is fixed to be beneficial to guaranteeing the overall dimension.
One side of the upper end plug 1-1 and one side of the lower end plug 1-2, which are close to the core mould 2, are both provided with sunken table tops, the core mould 2 is positioned on the sunken table tops, namely, a slot is formed between the end plug and the rubber cylinder, and the core mould 2 is positioned in the slot.
The lower end of the core mould 2 is positioned at the position where the diameter of the outer fixed cylinder 6 is larger, the position of the upper end of the core mould 2 is higher than the top of the outer fixed cylinder 6, and the height of the rubber cylinder 5 is higher than that of the outer fixed cylinder 6.
The shapes of the upper end plug 1-1 and the lower end plug 1-2 are matched with the shapes of two ends of the cavity 4, and the heights of the upper end plug 1-1 and the lower end plug are 40-100 mm; the thickness of the inner rubber cylinder and the thickness of the outer rubber cylinder are both 5-10 mm, the thickness of the inner fixing cylinder and the thickness of the outer fixing cylinder are both 5-10 mm, and the aperture of the injection hole is 10-15 mm.
Taking the core die providing the outer diameter of the pipe blank as an example, the process of carrying out the press blank forming of the refractory metal pipe by adopting the die specifically comprises the following steps:
1. selecting a core mould 2 according to the size requirement of the outer diameter of the pipe to be prepared, covering an inner rubber cylinder 7 outside an inner fixed cylinder 8, placing a lower end plug 1-2 at the bottom, placing the core mould 2 on the sunken table top of the lower end plug 1-2, sealing the bottom of the contact part of the outer rubber cylinder 5 and the core mould 2 and the bottoms of the outer rubber cylinder 5 and the inner fixed cylinder, and installing an outer fixed cylinder 6 outside the outer rubber cylinder 5, wherein the core mould 2 is externally provided with an outer rubber cylinder 5; filling the required first layer of refractory metal granulation powder A of the tube blank into a cavity 4, installing an upper end plug 1-1 at the upper part of an outer rubber cylinder 5, and sealing.
The sealing mode can adopt a binding structure arranged outside the cylinder body for sealing, for example, a metal wire is wound around and fastened at the position to be sealed. Thus:
the sealing mode of the bottom of the contact part of the outer rubber tube 5 and the core mould 2 is as follows: the metal wire is wound on the lower end of the core mould 2 outside the outer rubber cylinder 5 to be contacted with the outer rubber cylinder 5, and is wound in a cavity formed by the cylinder body with the diameter increased by the outer fixed cylinder 6 and the outer rubber cylinder 5.
The bottom of the outer rubber tube 5 and the bottom of the inner fixed tube 8 can be sealed by winding a metal wire at the lower end close to the outer fixed tube 6.
2. And (4) putting the filled die into a cold isostatic press for pressing and releasing pressure.
In the pressing process, cold isostatic pressing medium enters a gap between the inner rubber cylinder 7 and the inner fixed cylinder 8 of the mold through the injection hole and acts on the inner rubber cylinder 7 to enable the inner rubber cylinder 7 to be compressed outwards and form a tube blank;
3. lifting the mould from the cold isostatic press, removing the inner fixed cylinder 8 and the inner rubber cylinder 7, exposing the core blank 3 formed in the cavity 4, finishing the core blank 3 with the core mould 2 to ensure the regular shape of the inner hole of the core blank 3, then replacing the end plug, the inner rubber cylinder 7 and the inner fixed cylinder 8 with corresponding sizes according to the thickness of the next layer of the pipe to be pressed, reassembling the core blank with the core mould, and filling the second layer of the refractory metal granulation powder B of the required pipe into the isostatic press for pressing;
4. and (3) repeating the step (3) to press the pipe blank layer by layer from outside to inside until the last layer of refractory metal granulated powder is pressed, processing the pipe blank, and removing the core mold (2) to obtain the double-layer or multi-layer refractory metal pipe blank.
The mould is adopted to press the composite pipe blank, so that the size of the outer cavity of the pressed blank is accurate, the outer cavity of the pressed blank is positioned directly through the outer hole of the base material pipe, the reserved processing amount is reduced, and meanwhile, the refractory metal pipe blank with good density consistency of the pressed blank is obtained. When the core mold provides the inner diameter of the pipe blank, the mold can directly position the inner hole of the base material pipe, and the precision of the size of the inner cavity of the pressed blank is ensured.
Claims (10)
1. The utility model provides a mould for compound tubular product preparation of refractory metal, a serial communication port, include by interior and outer interior solid fixed cylinder (8), rubber cylinder and the outer solid fixed cylinder (6) of establishing of cover in proper order, the rubber cylinder includes interior rubber cylinder (7) and outer rubber cylinder (5), interior rubber cylinder (7) inner wall is pressed close to interior solid fixed cylinder (8) outer wall, outer solid fixed cylinder (6) inner wall is pressed close to outer rubber cylinder (5) outer wall, form the cavity between outer rubber cylinder (5) and interior rubber cylinder (7), be provided with mandrel (2) in the cavity, mandrel (2) are used for providing the size precision of initial internal diameter or external diameter for the tubular product pressed compact, form die cavity (4) between mandrel (2) and interior rubber cylinder (7) or outer rubber cylinder (5), die cavity (4) both ends are provided with the end plug, form sealed shaping chamber.
2. A mould for refractory metal composite pipe production according to claim 1, wherein the mandrel (2) is tubular.
3. The mold for refractory metal composite pipe production according to claim 1, wherein the outer fixed cylinder (6) is convex in longitudinal section.
4. The mold for preparing the refractory metal composite pipe according to claim 1, wherein when the core mold (2) and the inner rubber cylinder (7) form the cavity (4), the core mold (2) is close to the inner wall of the outer rubber cylinder (5), and the inner fixed cylinder (8) is provided with an injection hole.
5. The mold for preparing the refractory metal composite pipe according to claim 1, wherein when the cavity (4) is formed between the core mold (2) and the outer rubber cylinder (5), the core mold (2) is close to the outer wall of the inner rubber cylinder (7), and the outer fixed cylinder (6) is provided with an injection hole.
6. A mould for refractory metal composite pipe production as claimed in claim 4 or claim 5 wherein the injection holes are located in the region of the forming cavity.
7. The mold for manufacturing the refractory metal composite pipe according to claim 4 or 5, wherein the diameter of the injection hole is 10-15 mm.
8. A mould for refractory metal composite pipe production according to any one of claims 1 to 5, wherein the end plug is provided with a recessed table surface adjacent to the side of the mandrel (2), the mandrel (2) being located on the recessed table surface.
9. A mould for refractory metal composite pipe production as claimed in any one of claims 1 to 5, wherein the height of the end plugs is 40 to 100 mm; the thickness of the inner rubber cylinder (7) and the thickness of the outer rubber cylinder (5) are both 5-10 mm.
10. The mould for the production of the refractory metal composite pipe according to any one of claims 1 to 5, wherein the thickness of the inner fixed cylinder (8) and the thickness of the outer fixed cylinder (6) are both 5-10 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920894128.5U CN210587162U (en) | 2019-06-13 | 2019-06-13 | Mold for preparing refractory metal composite pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920894128.5U CN210587162U (en) | 2019-06-13 | 2019-06-13 | Mold for preparing refractory metal composite pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210587162U true CN210587162U (en) | 2020-05-22 |
Family
ID=70683072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920894128.5U Active CN210587162U (en) | 2019-06-13 | 2019-06-13 | Mold for preparing refractory metal composite pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210587162U (en) |
-
2019
- 2019-06-13 CN CN201920894128.5U patent/CN210587162U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110216277B (en) | Preparation method of refractory metal composite pipe | |
| CN110193601B (en) | Preparation method of double-layer or multi-layer refractory metal composite pipe | |
| CN207983642U (en) | A kind of two-way compacting tool set of easily demoulding tubular blank | |
| CN201645646U (en) | Cold isostatic pressing forming mould for preparing Na-beta-Al2O3 ceramic tube with one end closed | |
| JPS58215299A (en) | Production of composite valve seat | |
| CN104439238A (en) | High-temperature high-pressure powder near-net forming method of aluminum alloy thin-wall cross-shaped rib plate structure | |
| CN108971495B (en) | Hot isostatic pressing forming method for hemispheres of titanium alloy gas cylinders | |
| CN103586344A (en) | Bulging die without female die and method for manufacturing bulging die | |
| CN100579750C (en) | Shaping method of slight ceramic tube | |
| CN210548085U (en) | Double-layer or multilayer refractory metal composite pipe preparation mold | |
| CN210587162U (en) | Mold for preparing refractory metal composite pipe | |
| CN202490933U (en) | Metal powder isostatic cool pressing forming mold | |
| CN202428529U (en) | Isostatic-pressing forming mold for manufacturing ceramic tube shell | |
| CN101745782A (en) | Method for manufacturing hot segment of bent pipe of main pipeline of reactor | |
| CN109277445A (en) | A kind of metal bellows fluid pressure forming device and method | |
| CN209094271U (en) | A kind of metal bellows fluid pressure forming device | |
| CN114273661B (en) | Preparation method and application of irregular gear with annular groove | |
| CN213944891U (en) | Graphite die for SPS sintering industry | |
| CN114289717B (en) | Gear preparation mould with annular groove | |
| CN220456240U (en) | Tool for preventing deformation of bar-shaped magnetic core during sintering | |
| JP4523121B2 (en) | Method for producing powder compact | |
| CN205362663U (en) | Crucible drawing of patterns mould | |
| RU2792957C1 (en) | Method for manufacturing sintered tubular products with a powder collar | |
| CN218224504U (en) | Cold heading forming die | |
| CN214353163U (en) | Cold isostatic compaction mould for solid ceramic product |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |