CN101912896B - Method for manufacturing reducing pipe and die assembly thereof - Google Patents
Method for manufacturing reducing pipe and die assembly thereof Download PDFInfo
- Publication number
- CN101912896B CN101912896B CN2010102312156A CN201010231215A CN101912896B CN 101912896 B CN101912896 B CN 101912896B CN 2010102312156 A CN2010102312156 A CN 2010102312156A CN 201010231215 A CN201010231215 A CN 201010231215A CN 101912896 B CN101912896 B CN 101912896B
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- narrow
- die
- punch die
- shaping column
- bore tube
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title abstract description 20
- 239000002184 metal Substances 0.000 claims abstract description 17
- 229910052751 metal Inorganic materials 0.000 claims abstract description 17
- 238000005520 cutting process Methods 0.000 claims abstract description 8
- 238000007493 shaping process Methods 0.000 claims description 58
- 238000003825 pressing Methods 0.000 claims description 15
- 238000004080 punching Methods 0.000 claims description 5
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 239000010962 carbon steel Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 abstract description 8
- 239000000463 material Substances 0.000 description 3
- 238000003801 milling Methods 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
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Abstract
The invention discloses a method for manufacturing a reducing pipe and a die assembly thereof. The method has the following steps of: (1) preparing a metal plate blank; (2) placing the plate blank on a bottom die, and stamping the plate blank by using a first stamping die to obtain a pipe blank with a wide diameter pipe body and a narrow diameter pipe body, wherein the bottom wall of the narrow diameter pipe body is hemispherical; (3) placing the pipe blank into the bottom die, stamping the pipe blank by using a second stamping die, and stamping a through hole on the bottom wall of the narrow diameter pipe body; and (4) cutting the partial pipe body exposed out of the bottom opening of the bottom die by using a cutter so as to obtain the reducing pipe. The die assembly comprises the bottom die, the first stamping die and the second stamping die; the first stamping die is provided with a stamping head, a narrow diameter pipe molding column, a conical stamping face, a wide diameter pipe molding column and a pressure plate in turn from the bottom to the top; the second stamping die is provided with a narrow diameter pipe molding column, a conical stamping face, a wide diameter pipe molding column and a pressure plate in turn from the bottom to the top; and the bottom die is provided with a guide die cavity, a wide diameter pipe molding cavity, a conical connecting cavity and a narrow diameter pipe molding cavity. The method has the advantages of effectively reducing the cost and improving the production efficiency and the yield.
Description
Technical field
The invention belongs to pipe fitting processing and manufacturing technical field, be specifically related to a kind of manufacturing approach and die assembly thereof of reduced pipe.
Background technology
Existing reduced pipe; If one of which end perforate aperture and other end perforate aperture ratio are near 1 the time; Can adopt pressing promptly to can be made in an end reaming of pipe, if during large percentage, for example aperture ratio is greater than 1.5 or when bigger; Punching press reaming method just can't re-use, and this moment, general multiselect was with lathe milling moulding; Certainly, the method for employing lathe milling pore-forming generally can not receive the restriction of aperture ratio, has but greatly increased cost; The silk material that mills out has become garbage waste entirely, and waste is serious; In addition, milling moulding required time is bigger, causes production efficiency and yield rate lower.
Summary of the invention
The purpose of this invention is to provide and a kind ofly effectively reduce cost, enhance productivity and the manufacturing approach of the reduced pipe of yield rate.
Another object of the present invention provides and a kind ofly can effectively reduce cost, enhance productivity and the die assembly of yield rate.
The technical scheme that realizes first purpose of the present invention is: a kind of manufacturing approach of reduced pipe has following steps:
1. be ready to metal slabs;
2. metal slabs are placed on the bed die,, obtain the upper end and have the wide diameter tube body and the lower end has the pipe of narrow-bore tube body, and to make the diapire of said narrow-bore tube body be hemispherical with the first punch die stamped metal slab;
3. pipe is placed bed die,, on the diapire of narrow-bore tube body, stamp out open-work, and make the part diapire of the narrow-bore tube body bed die bottom end opening that is stamped out with the second punch die punching press pipe;
4. will expose the part body excision of bed die bottom end opening with cutting knife, thereby obtain the reduced pipe of forming.
In the such scheme, said first punch die is provided with drift, narrow-bore tube shaping column, taper stamping surface, wide diameter tube shaping column and pressing plate from the bottom up successively; Said second punch die is provided with narrow-bore tube shaping column, taper stamping surface, wide diameter tube shaping column and pressing plate from the bottom up successively; Said bed die is provided with guiding die cavity, wide diameter tube forming cavity, taper connection chamber and narrow-bore tube forming cavity from top to bottom successively.
In the such scheme, the outer surface of drift diapire is a hemisphere face in said first punch die; The diapire outer surface of narrow-bore tube shaping column is the plane in said second punch die.
In the such scheme, said metal slabs are stainless steel, carbon steel or copper; The weight of said metal slabs is more than or equal to the weight of the reduced pipe of forming; The internal diameter of said wide diameter tube body is 1.5 times to 10 times of internal diameter of said narrow-bore tube body.
In the such scheme, the external diameter of said wide diameter tube body is 1.5 times to 10 times of external diameter of said narrow-bore tube body.
In the such scheme, above-mentioned steps 4. in, the part body excision that also need will expose the bed die open upper end with cutting knife.
The technical scheme that realizes second purpose of the present invention is: a kind of die assembly that is used to make reduced pipe is characterized in that: comprise bed die, first punch die and second punch die; Said first punch die is provided with drift, narrow-bore tube shaping column, taper stamping surface, wide diameter tube shaping column and pressing plate from the bottom up successively; Said second punch die is provided with narrow-bore tube shaping column, taper stamping surface, wide diameter tube shaping column and pressing plate from the bottom up successively; Said bed die is provided with guiding die cavity, wide diameter tube forming cavity, taper connection chamber and narrow-bore tube forming cavity from top to bottom successively.
In the such scheme, the outer surface of drift diapire is a hemisphere face in said first punch die; Said first punch die is compared with second punch die, the length of the narrow-bore tube shaping column of said second punch die greater than the length of drift and narrow-bore tube shaping column in said first punch die with.
In the such scheme, the diapire outer surface of narrow-bore tube shaping column is the plane in said second punch die.
In the such scheme; The narrow-bore tube shaping column external diameter of the narrow-bore tube shaping column of said first punch die and second punch die is identical; The external diameter of the wide diameter tube shaping column of said first punch die is identical with the external diameter of the wide diameter tube shaping column of second punch die, and the external diameter of the wide diameter tube shaping column of said first punch die is 1.5 times to 10 times of external diameter of its narrow-bore tube shaping column.
The present invention has positive effect: (1) the inventive method and die assembly; Procedure of processing is comparatively simplified, and operates comparatively easyly, can effectively process the aperture, two ends and differ bigger reduced pipe; And have higher production efficiency and yield rate, effectively reduce manufacturing cost.
Description of drawings
Fig. 1 is 2. a kind of operation chart of step in the inventive method;
Fig. 2 is a kind of half sectional view through the pipe that obtains after the operation processing shown in Figure 1;
Fig. 3 be in the inventive method 3. with 4. a kind of operation chart of step;
Fig. 4 is a kind of half sectional view through the reduced pipe that obtains after the step process shown in Figure 3;
Fig. 5 is the structural representation of the die assembly that is used to make reduced pipe among the present invention.
Be labeled as shown in the accompanying drawing: metal slabs 1, bed die 2, guiding die cavity 21, wide diameter tube forming cavity 22, taper connection chamber 23, narrow-bore tube forming cavity 24, the first punch dies 3; Drift 31, drift diapire 311, narrow-bore tube shaping column 32, taper stamping surface 33, wide diameter tube shaping column 34, pressing plate 35; Pipe 4, wide diameter tube body 41, narrow-bore tube body 42, diapire 421, tapered wall 43, the second punch dies 5; Narrow-bore tube shaping column 51, taper stamping surface 52, wide diameter tube shaping column 53, pressing plate 54, reduced pipe 6, cutting knife 7.
The specific embodiment
(manufacturing approach of embodiment 1, reduced pipe)
Fig. 1 to Fig. 4 has shown a kind of specific embodiment of the present invention, and wherein, Fig. 1 is 2. a kind of operation chart of step in the inventive method; Fig. 2 is a kind of half sectional view through the pipe that obtains after the operation processing shown in Figure 1; Fig. 3 be in the inventive method 3. with 4. a kind of operation chart of step; Fig. 4 is a kind of half sectional view through the reduced pipe that obtains after the step process shown in Figure 3.
Present embodiment is a kind of manufacturing approach that is used to make reduced pipe, sees Fig. 1 to Fig. 4, has following steps:
1. be ready to metal slabs 1;
2. metal slabs 1 are placed on the bed die 2, with first punch die, 3 stamped metal slabs 1, obtain that the upper end has wide diameter tube body 41, the centre has tapered wall 43 and the lower end has the pipe 4 of narrow-bore tube body 42, and to make the diapire 421 of said narrow-bore tube body 42 are hemisphericals;
3. pipe 4 is placed bed die 2,, on the diapire of narrow-bore tube body 42, stamp out open-work, and make the part diapire of narrow-bore tube body 42 bed die 2 bottom end openings that are stamped out with second punch die, 5 punching press pipes 4;
4. will expose the part body excision of bed die 2 bottom end openings with cutting knife 7, thereby obtain the reduced pipe 6 of forming.
Said first punch die is provided with drift 31, narrow-bore tube shaping column 32, taper stamping surface 33, wide diameter tube shaping column 34 and pressing plate 35 from the bottom up successively; Said second punch die is provided with narrow-bore tube shaping column 51, taper stamping surface 52, wide diameter tube shaping column 53 and pressing plate 54 from the bottom up successively; Said bed die 2 is provided with guiding die cavity 21, wide diameter tube forming cavity 22, taper connection chamber 23 and narrow-bore tube forming cavity 24 from top to bottom successively.
The outer surface of drift 31 diapires 311 is hemisphere faces in said first punch die; The diapire outer surface of narrow-bore tube shaping column is the plane in said second punch die.
Said metal slabs 1 are stainless steel, in concrete practice, also can select carbon steel or copper material for use; The weight of said metal slabs 1 is greater than the weight of the reduced pipe 6 of forming; In the present embodiment, the internal diameter of said wide diameter tube body 41 is twices of the internal diameter of said narrow-bore tube body 42, and in concrete practice, the internal diameter that the inventive method is particularly suitable for producing wide diameter tube body 41 is 1.5 times to 10 times a reduced pipe of the internal diameter of said narrow-bore tube body 42.
(manufacturing approach of embodiment 2, reduced pipe)
Present embodiment and embodiment 1 are basic identical; Difference is: above-mentioned steps 2. in, in the process of punching press, possibly have the part material and be exposed at outside bed die 2 open upper end; So above-mentioned steps 4. in, the part body excision that also need will expose bed die 2 open upper end with cutting knife.
(embodiment 3, die assembly)
Fig. 5 has shown a kind of specific embodiment of die assembly among the present invention for the structural representation of the die assembly that is used to make reduced pipe among the present invention.
Present embodiment is the die assembly that is used to make reduced pipe, comprises bed die 2, first punch die and second punch die; Said first punch die is provided with drift 31, narrow-bore tube shaping column 32, taper stamping surface 33, wide diameter tube shaping column 34 and pressing plate 35 from the bottom up successively; Said second punch die is provided with narrow-bore tube shaping column 51, taper stamping surface 52, wide diameter tube shaping column 53 and pressing plate 54 from the bottom up successively; Said bed die 2 is provided with guiding die cavity 21, wide diameter tube forming cavity 22, taper connection chamber 23 and narrow-bore tube forming cavity 24 from top to bottom successively.
The outer surface of drift 31 diapires 311 is hemisphere faces in said first punch die; Said first punch die is compared with second punch die, and the length a of the narrow-bore tube shaping column 51 of said second punch die is greater than length and the b of drift in said first punch die 31 with narrow-bore tube shaping column 32.
The diapire outer surface of narrow-bore tube shaping column is the plane in said second punch die.
Narrow-bore tube shaping column 51 external diameters of the narrow-bore tube shaping column 32 of said first punch die and second punch die are identical; The external diameter of the wide diameter tube shaping column 34 of said first punch die is identical with the external diameter of the wide diameter tube shaping column 53 of second punch die; The external diameter of the wide diameter tube shaping column 34 of said first punch die is 1.5 times to 10 times of external diameter of its narrow-bore tube shaping column 32, and present embodiment is 2 times.
In sum, the inventive method and die assembly, procedure of processing is comparatively simplified, and operates comparatively easyly, can effectively process the aperture, two ends and differ bigger reduced pipe, and have higher production efficiency and yield rate, effectively reduces manufacturing cost.
Obviously, the above embodiment of the present invention only be for clearly the present invention is described and is done for example, and be not to be qualification to embodiment of the present invention.For the those of ordinary skill in affiliated field, on the basis of above-mentioned explanation, can also make other multi-form variation or change.Here need not also can't give exhaustive to all embodiments.And these belong to conspicuous variation or the change that connotation of the present invention extends out and still belong to protection scope of the present invention.
Claims (7)
1. the manufacturing approach of a reduced pipe has following steps:
1. be ready to metal slabs (1);
2. metal slabs (1) are placed on the bed die (2),, obtain the upper end and have wide diameter tube body (41) and the lower end has the pipe (4) of narrow-bore tube body (42), and to make the diapire (421) of said narrow-bore tube body (42) be hemispherical with first punch die (3) stamped metal slab (1);
3. pipe (4) is placed bed die (2),, on the diapire of narrow-bore tube body (42), stamp out open-work, and make the part diapire of narrow-bore tube body (42) bed die (2) bottom end opening that is stamped out with second punch die (5) punching press pipe (4);
4. use cutting knife (7) will expose the part body excision of bed die (2) bottom end opening, thereby obtain the reduced pipe (6) of forming.
2. the manufacturing approach of reduced pipe according to claim 1, it is characterized in that: said first punch die is provided with drift (31), narrow-bore tube shaping column (32), taper stamping surface (33), wide diameter tube shaping column (34) and pressing plate (35) from the bottom up successively; Said second punch die is provided with narrow-bore tube shaping column (51), taper stamping surface (52), wide diameter tube shaping column (53) and pressing plate (54) from the bottom up successively; Said bed die (2) is provided with guiding die cavity (21), wide diameter tube forming cavity (22), taper connection chamber (23) and narrow-bore tube forming cavity (24) from top to bottom successively.
3. the manufacturing approach of reduced pipe according to claim 2, it is characterized in that: the outer surface of drift (31) diapire (311) is a hemisphere face in said first punch die; The diapire outer surface of narrow-bore tube shaping column is the plane in said second punch die.
4. the manufacturing approach of reduced pipe according to claim 1, it is characterized in that: said metal slabs (1) are carbon steel or copper; The weight of said metal slabs (1) is greater than the weight of the reduced pipe (6) of forming; The internal diameter of said wide diameter tube body (41) is 1.5 times to 10 times of internal diameter of said narrow-bore tube body (42).
5. the manufacturing approach of reduced pipe according to claim 4 is characterized in that: the external diameter of said wide diameter tube body (41) is 1.5 times to 10 times of external diameter of said narrow-bore tube body (42).
6. the manufacturing approach of reduced pipe according to claim 1 is characterized in that: above-mentioned steps 4. in, the part body excision that also need will expose bed die (2) open upper end with cutting knife.
7. a die assembly that is used to make reduced pipe is characterized in that: comprise bed die (2), first punch die and second punch die; Said first punch die is provided with drift (31), narrow-bore tube shaping column (32), taper stamping surface (33), wide diameter tube shaping column (34) and pressing plate (35) from the bottom up successively; Said second punch die is provided with narrow-bore tube shaping column (51), taper stamping surface (52), wide diameter tube shaping column (53) and pressing plate (54) from the bottom up successively; Said bed die (2) is provided with guiding die cavity (21), wide diameter tube forming cavity (22), taper connection chamber (23) and narrow-bore tube forming cavity (24) from top to bottom successively; The outer surface of drift (31) diapire (311) is a hemisphere face in said first punch die; Said first punch die is compared with second punch die, the length of the narrow-bore tube shaping column (51) of said second punch die greater than the length of drift (31) in said first punch die and narrow-bore tube shaping column (32) with; The diapire outer surface of narrow-bore tube shaping column is the plane in said second punch die; Narrow-bore tube shaping column (51) external diameter of the narrow-bore tube shaping column (32) of said first punch die and second punch die is identical; The external diameter of the external diameter of the wide diameter tube shaping column (34) of said first punch die and the wide diameter tube shaping column (53) of second punch die is identical, and the external diameter of the wide diameter tube shaping column (34) of said first punch die is 1.5 times to 10 times of external diameter of its narrow-bore tube shaping column (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102312156A CN101912896B (en) | 2010-07-20 | 2010-07-20 | Method for manufacturing reducing pipe and die assembly thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102312156A CN101912896B (en) | 2010-07-20 | 2010-07-20 | Method for manufacturing reducing pipe and die assembly thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101912896A CN101912896A (en) | 2010-12-15 |
| CN101912896B true CN101912896B (en) | 2012-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102312156A Expired - Fee Related CN101912896B (en) | 2010-07-20 | 2010-07-20 | Method for manufacturing reducing pipe and die assembly thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101912896B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102601242A (en) * | 2012-04-04 | 2012-07-25 | 无锡欧易博阀业科技有限公司 | Valve seat necking die |
| CN103008382B (en) * | 2012-12-17 | 2015-06-17 | 苏州热工研究院有限公司 | Die for manufacturing reducing pipe |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1528542A (en) * | 2003-10-20 | 2004-09-15 | 广州冠华金属精工制造有限公司 | Method and apparatus for manufacturing reducing pipe |
| CN101274336A (en) * | 2008-05-07 | 2008-10-01 | 杭州泛亚水暖器材有限公司 | Method for producing variable diameter pipe |
| CN201768832U (en) * | 2010-07-20 | 2011-03-23 | 阮继成 | Mold assembly for manufacturing reducing pipes |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4671601B2 (en) * | 2003-12-26 | 2011-04-20 | プランテックス株式会社 | Micro air hole processing method for inserter of smoke removal pipe and pipe for smoke removal |
-
2010
- 2010-07-20 CN CN2010102312156A patent/CN101912896B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1528542A (en) * | 2003-10-20 | 2004-09-15 | 广州冠华金属精工制造有限公司 | Method and apparatus for manufacturing reducing pipe |
| CN101274336A (en) * | 2008-05-07 | 2008-10-01 | 杭州泛亚水暖器材有限公司 | Method for producing variable diameter pipe |
| CN201768832U (en) * | 2010-07-20 | 2011-03-23 | 阮继成 | Mold assembly for manufacturing reducing pipes |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2005-193251A 2005.07.21 |
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| Publication number | Publication date |
|---|---|
| CN101912896A (en) | 2010-12-15 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: ZHEJIANG TIANLI JIUTIAN PIPE INDUSTRY CO., LTD. Free format text: FORMER OWNER: RUAN JICHENG Effective date: 20131227 |
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| C41 | Transfer of patent application or patent right or utility model | ||
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Free format text: CORRECT: ADDRESS; FROM: 325604 WENZHOU, ZHEJIANG PROVINCE TO: 325600 WENZHOU, ZHEJIANG PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20131227 Address after: 325600, No. seventeen, No. 221, weft Road, Yueqing Economic Development Zone, Zhejiang, Zhejiang (B Electric Co., Ltd.) Patentee after: Zhejiang Tianli long Tian tube industry limited company Address before: Yueqing City, Zhejiang province 325604 Liushi Zhen Xi Xing Road No. 113 Patentee before: Ruan Jicheng |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120926 Termination date: 20150720 |
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