CN108817293B - Forging tool and process for upsetting two ends of thin-walled tube - Google Patents
Forging tool and process for upsetting two ends of thin-walled tube Download PDFInfo
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- CN108817293B CN108817293B CN201810903735.3A CN201810903735A CN108817293B CN 108817293 B CN108817293 B CN 108817293B CN 201810903735 A CN201810903735 A CN 201810903735A CN 108817293 B CN108817293 B CN 108817293B
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- die
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- driving module
- upsetting
- hydraulic driving
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000005242 forging Methods 0.000 title claims abstract description 17
- 230000008569 process Effects 0.000 title claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/08—Upsetting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/08—Accessories for handling work or tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/14—Making machine elements fittings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention relates to a forging tool and a forging process for upsetting two ends of a thin-walled tube, wherein the forging tool comprises a multi-petal combined clamp, the multi-petal combined clamp is matched with a first hydraulic driving module, and the thin-walled tube is clamped; the method is characterized in that: the male die is provided with a positioning step matched with the female die, and the female die is matched with the die shank to fix the male die on the die shank; the die shank is fixedly arranged on the second hydraulic driving module through a locking nut. The forging tool can effectively solve the existing problems, and further guarantees upsetting quality of two ends of the thin-wall pipe.
Description
Technical Field
The invention relates to the technical field of thin-wall pipe fitting machining, in particular to a forging tool and a forging process for upsetting two ends of a thin-wall pipe.
Background
With the development of market economy, various industrial products gradually develop to a more efficient, lighter and more humanized direction. Wherein the down-the-hole drill rod for rock drilling is no exception. Users often require manufacturers to reduce the weight of drill pipe as much as possible after meeting basic functionality requirements to reduce operator and equipment workload, and thin-walled pipes are therefore used in a large number of applications. The common drill rod specifications in engineering construction are phi 76, phi 89, phi 102, phi 114 and the like. Taking phi 76 drill pipes as an example, the weight of a long 3m drill pipe manufactured by upsetting two ends of a thin-wall pipe with the thickness of 4.5mm is 27.8kg, and compared with the weight of a previous pipe with the thickness of 6.5, the weight of the long 3m drill pipe is reduced by 8.6kg, and the product is deeply favored by customers.
FIG. 1 is a diagram of a conventional phi 76 drill pipe; ① The friction welding tool is characterized in that the friction welding tool is a drill rod male joint, ② is a rod body with two upset ends, ③ is a drill rod female joint, and ④⑤ is inner flash of a drill rod after friction welding; FIG. 2 is a profile of one end of a thin walled tube after upsetting; the drill pipe male connector ① and the drill pipe female connector ③ are respectively connected with the rod body ② into a whole through friction welding, as shown in fig. 3 and 4.
The existing process equipment and method for upsetting the rod body at two ends are as follows:
As shown in fig. 5 and 6, the component 1 is a multi-petal combined clamp (see fig. 6), and the multi-petal combined clamp is used for clamping the thin-walled tube 2 and controlling the upsetting outer diameter of the tube body (similar to the action of a forming die), and the driving of the first hydraulic driving module 51 enables the multi-petal combined clamp 1 to complete the clamping action of the thin-walled tube 2; the component 4 is a lock nut which serves to fix the forming punch 3 to the hydraulic drive module 5.
The specific process steps are as follows: 1. after the thick end of the thin-wall pipe is heated to a set temperature, placing the thin-wall pipe into the multi-petal combined clamp 1, wherein the thick end surface of the thin-wall pipe cannot extend out of the end surface B of the clamp; 2. starting a hydraulic driving module to clamp the thin-wall pipe 2; 3. starting a second hydraulic driving module 5 to enable the forming male die 3 to move towards the pipe body; by the time of fig. 7, after finishing the aggregate forming, the male die 3 moves right and the multi-flap combined clamp 1 is released.
The upsetting method has the following disadvantages:
1. The multi-petal combined clamp 1 is a pipe body clamping component; the die body is also in direct contact with the high Wen Guanti in the inner cavity, the mechanical property of the whole upsetting process is greatly reduced in a high-temperature state, and the mouth part of the die body is easy to deform due to the fact that the die body is subjected to deformation force of the tube body at high temperature for many times, so that the upsetting quality is influenced.
2. The novel high-temperature high-strength plastic working table works under the working condition of high temperature and high strength, is a vulnerable part, and is complex to manufacture and high in cost.
3. The multi-petal combined clamp 1 is of a multi-petal combined type, a certain gap t is arranged between each two petals to achieve the clamping effect, and the diameter of each batch of pipes is greatly different due to the fact that the outer diameter size of the rolled thin-wall pipe is in a range of values. Therefore, too small gap t between each two lobes of the clamping block can cause clamping failure, when the gap t is too large, the accumulated material in the gap t is arranged on the surface of the pipe body in the upsetting process, and the upsetting appearance can not meet the design requirement.
4. The material gathering step 31 on the male die 3 can be matched with the inner hole of the multi-petal combined clamp 1 to gather materials for forming during working, the size of a matching clearance and the errors of the axes of the matching clearance and the errors of the axes can directly influence the upsetting quality, so that the parts are complex to manufacture and the assembly precision is high.
Disclosure of Invention
The invention aims to solve the technical problem of providing a forging tool and a forging process for upsetting two ends of a thin-walled tube, which can effectively solve the existing problems and further ensure the upsetting quality of the two ends of the thin-walled tube.
In order to achieve the technical characteristics, the aim of the invention is realized in the following way: the forging tool comprises a multi-petal combined clamp, wherein the multi-petal combined clamp is matched with a first hydraulic driving module and clamps the thin-walled tube; the method is characterized in that: the male die is provided with a positioning step matched with the female die, and the female die is matched with the die shank to fix the male die on the die shank; the die shank is fixedly arranged on the second hydraulic driving module through a locking nut.
The male die is provided with a demolding angle beta, the inner wall of the female die is provided with the demolding angle beta, and the male die and the female die are matched to form a die cavity.
The female die is connected with the die shank through threaded fit.
The depth L2 of the female die is smaller than the length L1 of a part of the thin-wall tube to be heated.
Any upsetting process of a forging tool for upsetting two ends of a thin-walled tube is characterized by comprising the following steps of:
step1: heating the thick end to be upsetted of the thin-wall pipe to a set temperature and then penetrating the thick end to be upsetted of the thin-wall pipe into a multi-petal combined clamp, so as to ensure that the length L1 of a heating part of the thin-wall pipe is smaller than the depth L2 of an inner hole of the female die;
Step2: starting the first hydraulic driving module and clamping the thin-wall pipe through the multi-petal combined clamp;
Step3: starting a second hydraulic driving module to enable the forming male die to move towards the inside of the thin-wall pipe;
Step4: the male die is driven by the second hydraulic driving module to upset for a plurality of times, after the material gathering forming is completed, the male die and the female die are integrally moved to the right to separate from the thin-wall tube, and the multi-petal combined clamp is loosened.
The invention provides a double-inner-cavity type outer sleeve impactor which effectively overcomes the defects of the existing impactor, has great structural change, and has the following advantages relatively:
1. Because the multi-flap combined clamp is not contacted with the high Wen Guanti, the common steel is manufactured and only used as a clamping part, so that the service life of the clamp is greatly prolonged; the clamp is used as a clamping part in the prior art, and the die is made of heat-resistant steel, so that the clamp is complex in manufacture and high in cost.
2. The size of the gap t between clamping blocks on the multi-petal combined clamp can not influence the upsetting forming quality, and the clamp can use pipe diameters with large-range diameter deviation.
3. The die is reasonable in design and integral, is reasonable in stress compared with the prior multi-petal die, is short in contact time with high temperature, is about 1/4 of the prior die, and greatly improves the service life.
4. The male die and the die shank are designed into split parts, the male die is made of heat-resistant steel, the die shank is made of common steel, the manufacturing cost is saved, the die shank is not required to be integrally disassembled when the specifications of the upsetting pipe body change, and the operation is convenient.
Drawings
The invention is further described below with reference to the drawings and examples.
FIG. 1 is a block diagram of a conventional phi 76 drill pipe.
Fig. 2 shows the profile of one end of the thin-walled tube after upsetting.
Fig. 3 is a partial enlarged view of a in fig. 1.
Fig. 4 is an enlarged view of part b of fig. 1.
Fig. 5 shows a conventional process apparatus for upsetting a rod body at two ends.
Fig. 6 is a structural view of a multi-piece modular clip.
Fig. 7 is a diagram showing a construction process of a conventional process equipment for upsetting a rod body at two ends.
Fig. 8 is a schematic structural view of the present invention.
Fig. 9 is a schematic view of the structure of the tooling during upsetting according to the present invention.
Fig. 10 is a structural view of the multi-lobe combined clamp of the present invention.
In the figure: the multi-petal combined clamp 1, a thin-wall pipe 2, a male die 32, a die shank 33, a positioning step 34, a die cavity 35, a female die 6, a second hydraulic driving module 5 and a first hydraulic driving module 51.
Detailed Description
Embodiments of the present invention will be further described with reference to the accompanying drawings.
Example 1:
8-10, a forging tool for upsetting two ends of a thin-walled tube comprises a multi-petal combined clamp 1, wherein the multi-petal combined clamp 1 is matched with a first hydraulic driving module 51 and clamps the thin-walled tube 2; the method is characterized in that: the male die 32 is provided with a positioning step 34 matched with the female die 6, and the female die 6 is matched with the die shank 33 to fix the male die 32 on the die shank 33; the die shank 33 is fixedly mounted on the second hydraulic drive module 5 by means of a lock nut 4. The forging tool can be used for upsetting the two ends of the thin-wall pipe 2 to replace the traditional process, so that upsetting quality is ensured.
Further, a demolding angle β is disposed on the male die 32, a demolding angle β is disposed on the inner wall of the female die 6, and the male die 32 and the female die 6 cooperate to form a die cavity 35. The structure facilitates demolding.
Further, the female die 6 is connected with the die shank 33 through threaded fit. The disassembly is convenient by the threaded fit connection.
Further, the depth L2 of the female die 6 is smaller than the length L1 of the portion of the thin-walled tube 2 to be heated. The structural strength of the female die 6 is ensured through the length design, special steel is not needed, and the female die is only manufactured by common steel.
Example 2:
any upsetting process of a forging tool for upsetting two ends of a thin-walled tube is characterized by comprising the following steps of:
Step1: heating the thick end to be upsetted of the thin-wall pipe 2 to a set temperature and then penetrating the thick end to be upsetted into the multi-petal combined clamp 1, so as to ensure that the length L1 of a heating part of the thin-wall pipe 2 is smaller than the depth L2 of an inner hole of the female die 6;
Step2: starting the first hydraulic driving module 51 and clamping the thin-wall tube 3 through the multi-petal combined clamp 1;
Step3: starting the second hydraulic driving module 5 to enable the forming male die 32 to move towards the inside of the thin-wall pipe 2;
Step4: the male die 32 is driven by the second hydraulic driving module 5 to upset for a plurality of times, after the material gathering forming is completed, the male die 32 and the female die 6 are moved to the right integrally to separate from the thin-wall tube 2, and the multi-petal combined clamp 1 is loosened.
From the above description, it is apparent to those skilled in the art that various changes and modifications can be made without departing from the scope of the technical spirit of the invention. The present invention is not limited to the prior art.
Claims (1)
1. The upsetting process for the two ends of the thin-walled tube comprises a forging tool, wherein the forging tool comprises a multi-petal combined clamp (1), and the multi-petal combined clamp (1) is matched with a first hydraulic driving module (51) and clamps the thin-walled tube (2); the male die (32) is provided with a positioning step (34) matched with the female die (6), and the female die (6) is matched with the die shank (33) to fix the male die (32) on the die shank (33); the die shank (33) is fixedly arranged on the second hydraulic driving module (5) through a locking nut (4);
The male die (32) is provided with a demoulding angle beta, the inner wall of the female die (6) is provided with the demoulding angle beta, and the male die (32) and the female die (6) are matched to form a die cavity (35);
The female die (6) is connected with the die shank (33) through threaded fit;
The upsetting process is characterized by comprising the following steps of:
Step1: heating the thick end to be upsetted of the thin-wall pipe (2) to a set temperature and then penetrating the thick end to be upsetted into the multi-petal combined clamp (1), so as to ensure that the length L1 of a heating part of the thin-wall pipe (2) is smaller than the depth L2 of an inner hole of the female die (6);
step2: starting a first hydraulic driving module (51) and clamping the thin-wall pipe (2) through the multi-petal combined clamp (1);
step3: starting a second hydraulic driving module (5) to enable the forming male die (32) to move towards the inside of the thin-wall tube (2);
Step4: the male die (32) is driven by the second hydraulic driving module (5) to upset for a plurality of times, after the material gathering forming is finished, the male die (32) and the female die (6) are integrally moved to the right to be separated from the thin-wall tube (2), and the multi-petal combined clamp (1) is loosened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810903735.3A CN108817293B (en) | 2018-08-09 | 2018-08-09 | Forging tool and process for upsetting two ends of thin-walled tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810903735.3A CN108817293B (en) | 2018-08-09 | 2018-08-09 | Forging tool and process for upsetting two ends of thin-walled tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108817293A CN108817293A (en) | 2018-11-16 |
| CN108817293B true CN108817293B (en) | 2024-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810903735.3A Active CN108817293B (en) | 2018-08-09 | 2018-08-09 | Forging tool and process for upsetting two ends of thin-walled tube |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114393166B (en) * | 2022-01-06 | 2024-08-13 | 钢铁研究总院 | Extrusion forming device and process for end flange of hollow long shaft piece |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201913175U (en) * | 2010-12-08 | 2011-08-03 | 湖南南方宇航工业有限公司 | Elbow pipe upset head mould |
| CN104175066A (en) * | 2014-07-07 | 2014-12-03 | 西安交通大学 | Axial pushing-in gathering and upsetting composite process of ultralong pipe head flange |
| CN208712758U (en) * | 2018-08-09 | 2019-04-09 | 宜昌市五环钻机具有限责任公司 | A kind of forging tooling that thin-wall tube both ends are upset |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT366938B (en) * | 1980-12-22 | 1982-05-25 | Gfm Fertigungstechnik | METHOD FOR PRODUCING LOCAL COAT REINFORCEMENTS ON HOLLOW BODIES |
| JP3637249B2 (en) * | 1999-10-22 | 2005-04-13 | 日本高周波鋼業株式会社 | Manufacturing method of spherical ring on outer diameter side |
| CN101653813B (en) * | 2009-08-31 | 2010-12-08 | 江阴德玛斯特钻具有限公司 | Internal-external thickening mould at tube ends of drill stem tube body |
| CN104097035A (en) * | 2014-07-03 | 2014-10-15 | 南通永大管业股份有限公司 | Multi-pass thickening molding integrated heavy weight drill pipe manufacturing method |
| CN108057839B (en) * | 2017-12-14 | 2024-01-12 | 苏州新凯紧固系统有限公司 | Cold heading forming process and cold heading module for automobile steering system sleeve |
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2018
- 2018-08-09 CN CN201810903735.3A patent/CN108817293B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201913175U (en) * | 2010-12-08 | 2011-08-03 | 湖南南方宇航工业有限公司 | Elbow pipe upset head mould |
| CN104175066A (en) * | 2014-07-07 | 2014-12-03 | 西安交通大学 | Axial pushing-in gathering and upsetting composite process of ultralong pipe head flange |
| CN208712758U (en) * | 2018-08-09 | 2019-04-09 | 宜昌市五环钻机具有限责任公司 | A kind of forging tooling that thin-wall tube both ends are upset |
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| CN108817293A (en) | 2018-11-16 |
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Effective date of registration: 20240604 Address after: 443001 No. 583 Juxiang Avenue, Biological Industry Park, High tech Zone, Yichang City, Hubei Province Applicant after: Hubei Wuhuan Ouke Manufacturing Technology Co.,Ltd. Country or region after: China Address before: 443000 Wujiagang Industrial Park, Yichang City, Hubei Province Applicant before: YICHANG WUHUAN ROCK DRILLING TOOLS CO.,LTD. Country or region before: China |
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