CN114523107A - Profiling green body powder forming die - Google Patents
Profiling green body powder forming die Download PDFInfo
- Publication number
- CN114523107A CN114523107A CN202210184499.0A CN202210184499A CN114523107A CN 114523107 A CN114523107 A CN 114523107A CN 202210184499 A CN202210184499 A CN 202210184499A CN 114523107 A CN114523107 A CN 114523107A
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- Prior art keywords
- rubber plug
- rubber sleeve
- plug
- forming die
- powder forming
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- 239000000843 powder Substances 0.000 title claims abstract description 37
- 230000000149 penetrating effect Effects 0.000 claims abstract description 6
- 238000000465 moulding Methods 0.000 claims description 5
- 238000003754 machining Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 description 9
- 238000007789 sealing Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
- B22F3/03—Press-moulding apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a profiling green body powder forming die which comprises a rubber sleeve, an upper rubber plug, a lower rubber plug, a core rod and a fastener, wherein a cavity penetrating through two ends of the rubber sleeve is arranged in the rubber sleeve; the middle parts of the upper rubber plug and the lower rubber plug are provided with through holes running through the two ends of the upper rubber plug and the lower rubber plug, the core bar is arranged in the forming cavity, one end of the core bar is hermetically sleeved in the through hole of the upper rubber plug, and the other end of the core bar is hermetically sleeved in the through hole of the lower rubber plug; the fastening piece is tightly sleeved at two ends of the rubber sleeve, so that the rubber sleeve is sealed with the upper rubber plug and the lower rubber plug. The profiling green body powder forming die has the advantages of capability of reducing CNC (computer numerical control) machining, simplicity and convenience in machining, high powder utilization rate and high machining efficiency.
Description
Technical Field
The invention relates to a die, in particular to a profiling green body powder forming die.
Background
At present, a large domestic O-shaped/V-shaped valve ball 200 (shown in figure 1) is mostly manufactured by adopting a powder forming mode, a columnar blank body is formed by utilizing a die, the periphery and the length of the blank body are machined by a lathe, and then the inner spherical surface 201 and the outer spherical surface 201 of the blank body are machined by using numerical control ball turning equipment. However, when the two end surfaces 202 and the spherical surface 201 are machined by the method, the removal amount of powder is large, the utilization rate is low, the size of the openings at the two ends is not controllable, and particularly in the CNC machining process, the machining is complex, the machining time is long, and the production efficiency is low.
Disclosure of Invention
The invention aims to provide a profiling green body powder forming die which reduces CNC machining, is simple and convenient to machine, and has high powder utilization rate and high machining efficiency.
In order to achieve the purpose, the powder forming die for the copying blank body comprises a rubber sleeve, an upper rubber plug, a lower rubber plug, a core rod and a fastener, wherein a cavity penetrating through two ends of the rubber sleeve is arranged in the rubber sleeve; the middle parts of the upper rubber plug and the lower rubber plug are provided with through holes penetrating through the two ends of the upper rubber plug and the lower rubber plug, the core bar is arranged in the forming cavity, one end of the core bar is hermetically sleeved in the through hole of the upper rubber plug, and the other end of the core bar is hermetically sleeved in the through hole of the lower rubber plug; the fastening piece is tightly sleeved at two ends of the rubber sleeve, so that the rubber sleeve is sealed with the upper rubber plug and the lower rubber plug.
Compared with the prior art, the invention arranges the rubber sleeve, the upper rubber plug and the lower rubber plug are arranged at the two ends of the rubber sleeve, the core rod is used for being hermetically sleeved in the upper rubber plug, the rubber sleeve and the lower rubber plug, and the rubber sleeve, the upper rubber plug and the lower rubber plug are fastened and sealed by the fastening piece, so that a closed forming cavity is formed inside the rubber sleeve, and the forming cavity can be used for carrying out powder forming to prepare a profiling green body. Moreover, the shape of the manufactured profiling blank is basically the same as that of the finished product, the cutting at the later stage is less, and the utilization rate of powder is extremely high.
Preferably, one of the inner wall of one end of the rubber sleeve and the outer wall of the upper rubber plug is provided with a first contact inclined plane, so that the upper rubber plug is assembled more and more tightly into the cavity. One of the inner wall of the other end of the rubber sleeve and the outer wall of the lower rubber plug is provided with a second contact inclined plane, so that the lower rubber plug is assembled more and more tightly in the cavity. Therefore, the sealing performance between the rubber sleeve and the upper rubber plug and between the rubber sleeve and the lower rubber plug can be effectively improved, the forming stability is ensured, and the powder forming effect is improved.
Preferably, the inner wall of the through hole of the upper rubber plug is provided with a third contact inclined plane, and the inner diameter of the through hole gradually decreases from one end far away from the head to one end close to the head. The inner wall of the through hole of the lower rubber plug is provided with a fourth contact inclined plane, and the inner diameter of the through hole of the lower rubber plug is gradually reduced from the position close to one end of the forming cavity to the position far away from one end of the forming cavity. Therefore, the sealing performance between the upper rubber plug and the core bar and between the upper rubber plug and the core bar is effectively improved, the forming stability is ensured, and the powder forming effect is improved.
Preferably, the rubber sleeve comprises a molding part and connecting parts integrally connected to two opposite ends of the molding part. Through setting up connecting portion make go up the plug reach down the plug can with the gum cover is effectively connected, can not be right again the shaping chamber causes the influence, improves the compactness of structure and the convenience of equipment.
Preferably, the inner end surfaces of the upper rubber plug and the lower rubber plug are planes. Therefore, the end faces of the two ends of the molded blank body are also planes, and a positioning surface is provided for subsequent processing.
Preferably, the outer end face of the upper rubber plug covers the end face of the rubber sleeve. Therefore, water can be prevented from entering through the gap between the rubber sleeve and the upper rubber plug in the wet pressing process, and a certain protection effect is achieved on the blank body.
Preferably, the upper rubber plug comprises a plunger body and a head portion, the diameter of the plunger body is smaller than that of the head portion, the plunger body is located in one end of the rubber sleeve, and the head portion is located outside one end of the rubber sleeve. Through setting up the head, both can be right go up the rubber stopper and insert carry on spacingly in the gum cover, can cover again the terminal surface of gum cover prevents to pass through at wet pressure in-process the gum cover reaches go up the clearance between the rubber stopper and intake.
Preferably, the core bar is of a hollow structure. Therefore, the weight of the die can be reduced, and the labor load of operators can be reduced.
Preferably, one end of the core bar, which is close to the upper rubber plug, is provided with a connecting piece. Through the connecting piece, can set up rings on the connecting piece, and then greatly improve the convenience of transport.
Preferably, the fastener is a belt. Utilize the elastic force of belt right the gum cover with go up between the plug and the gum cover with compress tightly down between the plug, make the gum cover with go up between the plug and the gum cover with sealing performance between the plug improves greatly down to can prevent effectively that wet in-process moisture from passing through the gum cover reaches the clearance between the plug gets into, avoids influencing the quality of body.
Drawings
Fig. 1 is a view showing the outline of an O-type valve ball of the present invention.
Fig. 2 is a structural view of a copying green body powder molding die of the invention.
Fig. 3 is a structural diagram of a rubber sleeve in the powder forming die of the copying blank body.
Fig. 4 is a structural diagram of the upper rubber plug in the powder forming die of the copying blank body of the invention.
Detailed Description
In order to explain technical contents, structural features, and effects achieved by the present invention in detail, the following detailed description is given with reference to the embodiments and the accompanying drawings.
As shown in fig. 2 to 4, the powder forming die 100 for a copying blank of the present invention is suitable for forming a ball valve blank, and includes a rubber sleeve 1, an upper rubber plug 2, a lower rubber plug 3, a core rod 4 and a fastening member 5, wherein a cavity 11 penetrating through both ends of the rubber sleeve 1 is disposed in the rubber sleeve 1, the upper rubber plug 2 is sleeved inside one end of the rubber sleeve 1, the lower rubber plug 3 is sleeved inside the other end of the rubber sleeve 1, so that a forming cavity 12 is formed in the rubber sleeve 1, and the forming cavity 12 is spherical. The middle parts of the upper rubber plug 2 and the lower rubber plug 3 are provided with through holes 21 and 31 which penetrate through the two ends of the upper rubber plug and the lower rubber plug, and the core rod 4 is arranged in the molding cavity 12. One end of the core bar 4 is hermetically sleeved in the through hole 21 of the upper rubber plug 2, and the core bar 4 extends outwards from the upper rubber plug 2 to prevent the surface of the upper rubber plug 2 from forming a concave surface to store water, so that the possibility of water seepage is avoided. The other end of the core bar 4 is hermetically sleeved in the through hole 31 of the lower rubber plug 3. The fastening piece 5 is tightly sleeved at two ends of the rubber sleeve 1, so that the rubber sleeve 1 is sealed with the upper rubber plug 2 and the lower rubber plug 3.
Referring to fig. 2 and 4, the outer end surface of the upper rubber plug 2 covers the end surface of the rubber sleeve 1. Therefore, water can be prevented from entering through the gap between the rubber sleeve 1 and the upper rubber plug 2 in the wet pressing process, and a certain protection effect is achieved on the blank body.
As shown in fig. 2 to 4, specifically, the rubber sleeve 1 includes a forming portion 1a and connecting portions 1b integrally connected to opposite ends of the forming portion 1a, and the forming portion 1a has a spherical structure. Through setting up connecting portion 1b makes go up plug 2 reach lower plug 3 can with gum cover 1 is effectively connected, can not be right again become die cavity 12 and cause the influence, improve the compactness of structure and the convenience of equipment. The thickness of the rubber sleeve 1 is 8-10 mm, and the hardness is 55-60 HA. The upper rubber plug 2 comprises a plunger body 2a and a head part 2b, the diameter of the plunger body 2a is smaller than that of the head part 2b, the plunger body 2a is located in one end of the rubber sleeve 1, and the head part 2b is located outside one end of the rubber sleeve 1. Through setting up head 2b, both can right go up plug 2 and insert carry on spacingly in the gum cover 1, can cover again the terminal surface of gum cover 1 prevents to pass through in the wet pressure process gum cover 1 reaches the clearance between the plug 2 is intake.
As shown in fig. 2 and 4, one of the inner wall of the connecting portion 1b of the rubber sleeve 1 and the outer wall of the plunger body 2a of the upper rubber plug 2 is provided with a first contact inclined surface 22, so that the upper rubber plug 2 is assembled more and more tightly into the cavity 11. The outer wall of the plunger body 2a of the upper rubber plug 2 is provided with the first contact inclined surface 22, the diameter of the plunger body 2a is gradually increased from one end far away from the head part 2b to one end close to the head part 2b, and the difference between the two ends is about 2 mm. Therefore, the sealing performance between the rubber sleeve 1 and the upper rubber plug 2 can be effectively improved, the forming stability is ensured, and the powder forming effect is improved. The inner wall of the through hole 21 of the upper rubber plug 2 is provided with a third contact inclined surface 23, so that the inner diameter of the through hole 21 gradually decreases from one end far away from the head part 2b to the direction close to one end of the head part 2b, and the difference between the two ends is about 2 mm. Therefore, the sealing performance between the upper rubber plug 2 and the core rod 4 is effectively improved, the forming stability is ensured, and the powder forming effect is improved.
Referring to fig. 2 and 4, a second contact inclined surface 12 is disposed on one of an inner wall of the connecting portion 1b at the other end of the rubber sleeve 1 and an outer wall of the lower rubber plug 3, so that the lower rubber plug 3 is assembled more and more tightly into the cavity 11. The outer wall of the lower rubber plug 3 is provided with the second contact inclined surface 12, the outer diameter of the lower rubber plug 3 is gradually increased from one end close to the forming cavity 12 to one end far away from the forming cavity 12, and the difference between the two ends is about 2 mm. In a similar way, the sealing performance between the rubber sleeve 1 and the lower rubber plug 3 can be effectively improved, the forming stability is ensured, and the powder forming effect is improved. The inner wall of the through hole 31 of the lower rubber plug 3 is provided with a fourth contact inclined plane 13, so that the inner diameter of the through hole 31 of the lower rubber plug 3 is gradually reduced from the end close to the forming cavity 12 to the direction far away from the end of the forming cavity 12, and the difference between the two ends is about 2 mm. Therefore, the sealing performance between the upper rubber plug 2 and the core rod 4 is effectively improved, the forming stability is ensured, and the powder forming effect is improved.
The inner end surfaces of the upper rubber plug 2 and the lower rubber plug 3 are planes. Therefore, the end faces of the two ends of the molded blank body are also planes, and a positioning surface is provided for subsequent processing.
As shown in fig. 2, the core rod 4 has a hollow structure. Specifically, the central portion of the core rod 4 is provided with an inner hole 41 penetrating through both ends thereof. Therefore, the weight of the die can be reduced, and the labor load of operators can be reduced. One end of the core bar 4 close to the upper rubber plug 2 is provided with a connecting piece 42. Specifically, the connecting piece 42 is arranged in an inner hole 41 of one end of the core bar 4 close to the upper rubber plug 2, a threaded hole 42a is formed in the middle of the connecting piece 42, the threaded hole 42a can be connected with a hanging ring, after connection, the hanging ring is located at the end of the core bar 4, and the whole die can be hoisted by connecting the hanging ring with a hanging rope. Thus, the convenience of carrying the mold can be greatly improved.
Referring again to fig. 2, the fastener 5 is a belt. The width of belt is as wide as possible, and the internal diameter of leather collar is half the size that needs to seal under the natural state to can provide sufficient elastic force under the prerequisite of guaranteeing that the belt can not be impaired. Utilize the elastic force of belt right the gum cover 1 with go up between the plug 2 and the gum cover 1 with compress tightly between the plug 3 down, make the gum cover 1 with go up between the plug 2 and the gum cover 1 with sealing performance between the plug 3 down improves greatly to can prevent effectively that wet in-process moisture from passing through the gum cover 1 reaches the clearance between the plug 2 gets into, avoids influencing the quality of body.
Compared with the prior art, the invention arranges the rubber sleeve 1, the upper rubber plug 2 and the lower rubber plug 3 at the two ends of the rubber sleeve 1, utilizes the core bar 4 to be sleeved in the upper rubber plug 2, the rubber sleeve 1 and the lower rubber plug 3 in a sealing way, and utilizes the fastening piece 5 to fasten and seal the rubber sleeve 1, the upper rubber plug 2 and the lower rubber plug 3, thereby forming a closed forming cavity 12 in the rubber sleeve 1, and can carry out powder forming to prepare a profiling green body through the forming cavity 12, therefore, the traditional mode of pressing powder into a columnar green body and then cutting off the powder is not needed, the steps of CNC processing are reduced, the processing is simpler and more convenient, the processing time is greatly shortened, and the processing efficiency is high. Moreover, the shape of the manufactured profiling blank is basically the same as that of the finished product, the cutting at the later stage is less, and the utilization rate of powder is extremely high.
The above disclosure is only a preferred embodiment of the present invention, and certainly should not be taken as limiting the scope of the present invention, which is therefore intended to cover all equivalent changes and modifications within the scope of the present invention.
Claims (10)
1. A copying blank body powder forming die is characterized in that: the rubber sleeve is internally provided with a cavity running through two ends of the rubber sleeve, the upper rubber plug is sleeved inside one end of the rubber sleeve, and the lower rubber plug is sleeved inside the other end of the rubber sleeve so as to form a molding cavity in the rubber sleeve; the middle parts of the upper rubber plug and the lower rubber plug are provided with through holes penetrating through the two ends of the upper rubber plug and the lower rubber plug, the core bar is arranged in the forming cavity, one end of the core bar is hermetically sleeved in the through hole of the upper rubber plug and extends outwards, and the other end of the core bar is hermetically sleeved in the through hole of the lower rubber plug; the fastening piece is tightly sleeved at two ends of the rubber sleeve so as to seal the rubber sleeve, the upper rubber plug and the lower rubber plug.
2. The contoured body powder forming die of claim 1, wherein: one of the inner wall of one end of the rubber sleeve and the outer wall of the upper rubber plug is provided with a first contact inclined plane so that the upper rubber plug is assembled more and more tightly into the cavity; one of the inner wall of the other end of the rubber sleeve and the outer wall of the lower rubber plug is provided with a second contact inclined plane, so that the lower rubber plug is assembled more and more tightly in the cavity.
3. The contoured body powder forming die of claim 1, wherein: the inner wall of the through hole of the upper rubber plug is provided with a third contact inclined plane, and the inner diameter of the through hole is gradually reduced from one end far away from the head part to one end close to the head part; the inner wall of the through hole of the lower rubber plug is provided with a fourth contact inclined plane, and the inner diameter of the through hole of the lower rubber plug is gradually reduced from one end far away from the forming cavity to the direction close to one end of the forming cavity.
4. The contoured body powder forming die of claim 1, wherein: the rubber sleeve comprises a forming part and connecting parts integrally connected to two opposite ends of the forming part.
5. The contoured body powder forming die of claim 1, wherein: the outer end faces of the upper rubber plug and the lower rubber plug are planes.
6. The contoured body powder forming die of claim 1, wherein: the outer end face of the upper rubber plug covers the end face of the rubber sleeve.
7. The contoured body powder forming die of claim 1, wherein: the upper rubber plug comprises a plunger body and a head part, the diameter of the plunger body is smaller than that of the head part, the plunger body is positioned in one end of the rubber sleeve, and the head part is positioned outside one end of the rubber sleeve.
8. The contoured body powder forming die of claim 1, wherein: the core bar is of a hollow structure.
9. The contoured body powder forming die of claim 1, wherein: and a connecting piece is arranged at one end of the core bar, which is close to the upper rubber plug.
10. The contoured body powder forming die of claim 1, wherein: the fastener is a belt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210184499.0A CN114523107A (en) | 2022-02-25 | 2022-02-25 | Profiling green body powder forming die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210184499.0A CN114523107A (en) | 2022-02-25 | 2022-02-25 | Profiling green body powder forming die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114523107A true CN114523107A (en) | 2022-05-24 |
Family
ID=81624551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210184499.0A Pending CN114523107A (en) | 2022-02-25 | 2022-02-25 | Profiling green body powder forming die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114523107A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202125703U (en) * | 2011-07-11 | 2012-01-25 | 杨胜举 | Quickly-sealing device for pipe orifice |
| CN104668555A (en) * | 2013-11-30 | 2015-06-03 | 扬州市海力精密机械制造有限公司 | Feeder compression device |
| CN205684718U (en) * | 2016-06-29 | 2016-11-16 | 航天海鹰(哈尔滨)钛业有限公司 | A kind of cold isostatic compaction mould for preparing metal filtration pipe |
| CN109746439A (en) * | 2019-03-19 | 2019-05-14 | 金堆城钼业股份有限公司 | A kind of static pressure Accurate Shaping devices such as molybdenum heavy wall pipe and uniforming sintering method |
| JP2019090079A (en) * | 2017-11-14 | 2019-06-13 | Ntn株式会社 | Annular green compact molding die |
| CN209969558U (en) * | 2019-01-19 | 2020-01-21 | 广东博杰特新材料科技有限公司 | Wet bag type cold isostatic pressing forming die |
| CN111014665A (en) * | 2019-12-27 | 2020-04-17 | 哈尔滨工程大学 | Waterproof method applied to isostatic pressing die |
| CN210359246U (en) * | 2019-05-08 | 2020-04-21 | 韶关市欧莱高新材料有限公司 | Demoulding mould for forming cold isostatic pressing tube blank |
| CN210359247U (en) * | 2019-05-08 | 2020-04-21 | 韶关市欧莱高新材料有限公司 | Cold isostatic pressing pipe blank forming die |
| CN111545761A (en) * | 2020-05-08 | 2020-08-18 | 山东威尔斯通钨业有限公司 | Preparation method of tungsten-copper alloy with elongated hole |
-
2022
- 2022-02-25 CN CN202210184499.0A patent/CN114523107A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202125703U (en) * | 2011-07-11 | 2012-01-25 | 杨胜举 | Quickly-sealing device for pipe orifice |
| CN104668555A (en) * | 2013-11-30 | 2015-06-03 | 扬州市海力精密机械制造有限公司 | Feeder compression device |
| CN205684718U (en) * | 2016-06-29 | 2016-11-16 | 航天海鹰(哈尔滨)钛业有限公司 | A kind of cold isostatic compaction mould for preparing metal filtration pipe |
| JP2019090079A (en) * | 2017-11-14 | 2019-06-13 | Ntn株式会社 | Annular green compact molding die |
| CN209969558U (en) * | 2019-01-19 | 2020-01-21 | 广东博杰特新材料科技有限公司 | Wet bag type cold isostatic pressing forming die |
| CN109746439A (en) * | 2019-03-19 | 2019-05-14 | 金堆城钼业股份有限公司 | A kind of static pressure Accurate Shaping devices such as molybdenum heavy wall pipe and uniforming sintering method |
| CN210359246U (en) * | 2019-05-08 | 2020-04-21 | 韶关市欧莱高新材料有限公司 | Demoulding mould for forming cold isostatic pressing tube blank |
| CN210359247U (en) * | 2019-05-08 | 2020-04-21 | 韶关市欧莱高新材料有限公司 | Cold isostatic pressing pipe blank forming die |
| CN111014665A (en) * | 2019-12-27 | 2020-04-17 | 哈尔滨工程大学 | Waterproof method applied to isostatic pressing die |
| CN111545761A (en) * | 2020-05-08 | 2020-08-18 | 山东威尔斯通钨业有限公司 | Preparation method of tungsten-copper alloy with elongated hole |
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