CN102581153A - Processing method of closed-up pull rod - Google Patents
Processing method of closed-up pull rod Download PDFInfo
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- CN102581153A CN102581153A CN2012100039873A CN201210003987A CN102581153A CN 102581153 A CN102581153 A CN 102581153A CN 2012100039873 A CN2012100039873 A CN 2012100039873A CN 201210003987 A CN201210003987 A CN 201210003987A CN 102581153 A CN102581153 A CN 102581153A
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- pull rod
- pull bar
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Abstract
The invention relates to a processing method of a closed-up pull rod. The processing method mainly comprises the steps that the middle wall thickness (1) of a pipe is forged and thinned and then an end head (2) of the pipe is closed up so that the wall thickness of the end head of the pull rod achieves the requirements of using performance of the pull rod. The processing method provided by the invention ensures that the processing efficiency of the pull rod is greatly improved, the pull rod is not influenced by the temperature of thermal closing-up equipment when processed, each performance of the processed pull rod is better than that of a thermal closed-up pull rod, and each test data also meets all the requirements of technical conditions of the pull rod.
Description
Technical field
The present invention relates to a kind of closing in pull bar processing method, particularly relate to a kind of processing method of helicopter operation pull bar.
Background technology
The helicopter operation pull bar is an important stressed member in the helicopter operation system; The back wall thickness need reach 3.3～3.6mm because the assembling and the serviceability characteristics of this pull bar, its termination close up, for reaching this requirement; At present; Domestic each helicopter manufacturer all adopts the pipe of 1.0～1.5mm wall thickness to carry out the process that heat closes up, and promptly through end heating for multiple times jumping-up that pipe is closed up, thereby makes thick the thickening to 3.3～3.6mm of pipe closing in end wall.But hot closing in method is subject to hot closing in device temperature control, and equipment was heated to 460 ℃～475 ℃ needs more than two hour, and every kind of pipe closing in moulding needs 3～5 molds, and ability was replaceable after more mold exchange need be treated apparatus cools again at every turn.This hot bottling technique method efficient is extremely low, processes a product needed 1～2 hour, and aluminum pipe is after heating for multiple times, and material grains is thick, and each item performance descends, and influences product quality, also is unfavorable for the batch process of helicopter.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of the raising to make efficient, the closing in pull bar processing method of tension member closing in device temperature influence not.
For solving above technical problem, main method of the present invention is: with processing attenuation in the middle of the pipe, closed up in the pipe termination more earlier.Specifically comprise following steps: step 1, with pipe intermediate ends processing attenuation, its program thins plug and thins mould for designing earlier and making; To thin plug and die device then in swager; Pipe is inserted in thins plug, start swager then, with forging attenuation in the middle of the pipe; Step 2 closes up the pipe termination, and its program is design earlier and makes closing-in mould, again closing-in mould is installed on swager, then the non-end that thins is forged closing in.
The present invention is not influenced by device temperature, and each moulding is need 1～2 mold only, and more the mold exchange time lacks, and process velocity is fast, has improved production efficiency greatly; Processing back material grains is tiny, and each item performance specific heat bottling technique is good.
Description of drawings
Fig. 1 is a kind of closing in Tiebar structure sketch map that the present invention processed:
Fig. 2 thins sketch map for tube wall in the middle of the step 1 pipe among the present invention;
Fig. 3 is step 2 pipe termination closing in sketch map among the present invention;
Fig. 4 is by using the present invention to be processed G25 * 1 tube construction sketch map;
Wherein, in the middle of the 1-pipe, 2-pipe termination, 3-thin plug, 4-thins mould, 5-pipe, 6-closing-in mould.
The specific embodiment
Further specify below in conjunction with the accompanying drawing specific embodiments of the invention.
Fig. 1 is a kind of closing in Tiebar structure sketch map that the present invention processed, and this closing in pull bar is a tubular structure, and 1 is thin-walled in the middle of the pipe, closes up and be heavy wall in pipe termination 2.The present invention adds the swager that uses man-hour can adopt the accurate rotary swager of X40J.
Step 1: with 1 processing attenuation in the middle of the pipe.Referring to Fig. 1, Fig. 2.Its program comprises: one, and design and manufacturing thin plug 3 and thin mould 4; Two, will thin plug 3 and thin mould 4 and be installed on swager; Three, pipe 5 is inserted in thins plug 3; Four, start swager, pipe middle 1 is forged attenuation.
Step 2: closed up in pipe termination 2.Participate in Fig. 3.Its program comprises: one, and design is also made closing-in mould 6; Two, closing-in mould 6 is installed on swager; Three, pipe termination 2 is forged closing in.
Illustrate technical process of the present invention below.Referring to Fig. 4, aluminium pull bar G25 * 1 (internal diameter is 25mm, and wall thickness is 1mm) is example to use always; If will process the pull bar of G25 * 1, we adopt aluminum pipe G28 * 2.5 (internal diameter is 28mm, and wall thickness is 2.5mm) to process; Also can adopt internal diameter identical, but wall thickness must be greater than the aluminum pipe of 2mm, but wall thickness should not be too big; The difficulty of wall thickness attenuation in the middle of such can increasing, wall thickness preferably is controlled in the 3mm scope.
At first carry out step 1.
The first, we design and make pipe and thin plug 3, and thin plug 3 and should insert pipe 5 inside, but can not be too small, that kind can make the pipe endoporus not reach designing requirement, and the diameter that therefore thins plug 3 employings is φ 22.9 ± 0.03.
The second, design and manufacturing pipe thin mould 4.Design and make to use cylinder solid thin plug 3, design is also made and is thinned mould 4 and be divided into four altogether, the inwall profile is consistent with finished product pull bar intermediate thin wall part after four merging.Because aluminum pipe is an annealed condition; Hardness is lower; Can disposablely thin (stainless steel pull bar and heavy wall aluminum pipe need thin for 2-3 time), thinning mould 4 applying internal diameters is φ 25, reaches the size of design; Pipe 5 constantly rotates (general rotating speed is 1500r/min) when forging, and forges back aluminum tube surfaces fineness with raising.
The 3rd, will thin plug 3 and put into aluminum pipe G28 * 2.5, be installed on swager together with thinning mould 4.
The 4th, start swager, pipe middle 1 is forged attenuation, make the interlude wall thickness reach 1mm.
1 processing attenuation effect is as shown in Figure 2 in the middle of the pipe.
Carry out step 2 then.
The first, design closing-in mould 6, the mould of design is divided into four altogether, and four moulds merge back inwall profile and Fig. 4 and close up and hold consistently, and the straightway after the closing in can suitably extend, and is convenient to add the worker.
The second, the pipe 5 that thins interlude places on the swager axle, and axle is constantly rotated (general rotating speed also for 1500r/min), and four moulds separate fast, closed (generally dividing sum velocity is 7000r/min).Forge in the process of closing at swager, pipe 5 forward strokes are set, the closing in external diameter of holding that makes it to close up reaches Fig. 4 requirement.
Pipe termination 2 closing in design sketch are as shown in Figure 3.
In order to verify the close up feasibility of pull bar processing method of the present invention, we spy carries out Metallographic Analysis to aluminium pull bar shown in Figure 4, and the analysis result material grains is tiny, and the equal specific heat of its each item performance indications closes up.
In order to reach instructions for use to the pull bar that uses the present invention to process after the closing in; The spy does unstability, elasticity, destruction, pull-off test to it; Also all Pass Test requirements, therefore, the present invention is feasible; And can enhance productivity greatly, and indicate direction for follow-up manufacturing of other types pull bar and research.
The present invention is applicable to all similar pull bars.
Claims (2)
1. closing in pull bar processing method is characterized in that comprising following steps:
Step 1; With (1) processing attenuation in the middle of the pipe; Its program thins plug (3) and thins mould (4) for designing earlier and making, and will thin plug (3) then and thin mould (4) to be installed on swager, pipe (5) is inserted in thins plug (3); Start swager then, (1) in the middle of the pipe is forged attenuation;
Step 2 closes up pipe termination (2), and its program is design earlier and makes closing-in mould (6), again closing-in mould (6) is installed on swager, then pipe termination (2) is forged closing in.
2. closing in pull bar processing method according to claim 1; Its characteristic also is: a kind of in said step; Design and make to use cylinder solid thin plug (3); Design and manufacturing thin mould (4) and are divided into four altogether, and the inwall profile is consistent with finished product pull bar intermediate thin wall part after four merging; In said step 1, pipe when forging (5) constantly rotates, and rotating speed is 1500r/min; In said step 2, the closing-in mould that manufactures and designs and use (6) is divided into four altogether, and the inwall profile is consistent with finished product pull bar closing in end after four merging; In said step 2, place pipe (5) on the swager, pipe when forging (5) constantly rotates, and rotating speed is 1500r/min, and (6) four moulds of while closing-in mould separate fast and closure forges, and dividing sum velocity is 7000r/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100039873A CN102581153A (en) | 2012-01-06 | 2012-01-06 | Processing method of closed-up pull rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100039873A CN102581153A (en) | 2012-01-06 | 2012-01-06 | Processing method of closed-up pull rod |
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| CN102581153A true CN102581153A (en) | 2012-07-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012100039873A Pending CN102581153A (en) | 2012-01-06 | 2012-01-06 | Processing method of closed-up pull rod |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104493035A (en) * | 2014-11-24 | 2015-04-08 | 西安创新精密仪器研究所 | Rotary swaging method for processing pull rods |
| CN104668892A (en) * | 2013-12-02 | 2015-06-03 | 江西昌河航空工业有限公司 | Shell nosing machining technology method for pull rod of helicopter |
| CN112170773A (en) * | 2020-08-25 | 2021-01-05 | 福建龙溪轴承(集团)股份有限公司 | Light alloy non-revolving body special-shaped integral pull rod precision forging near-net forming technology |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10297242A (en) * | 1997-04-30 | 1998-11-10 | Tube Forming:Kk | Stabilizer in suspension system of automobile and manufacture thereof |
| EP1252946A2 (en) * | 2001-04-25 | 2002-10-30 | Muhr und Bender KG | Method for producing rotationally symmetric parts |
| 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 |
| CN1684783A (en) * | 2002-09-26 | 2005-10-19 | 费尔斯有限公司 | Method and device for the production of a tubular workpiece, particularly a shock absorber piston rod, and such a workpiece |
| KR100790319B1 (en) * | 2007-06-21 | 2007-12-28 | 삼원산업 주식회사 | Method for processing automobile cowl cross bar using rotary swaging and the automobile cowl cross bar |
| CN101176905A (en) * | 2003-12-22 | 2008-05-14 | 本田技研工业株式会社 | Method of forming member,valve guide and method of forming the same and method of forming tubular member |
-
2012
- 2012-01-06 CN CN2012100039873A patent/CN102581153A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10297242A (en) * | 1997-04-30 | 1998-11-10 | Tube Forming:Kk | Stabilizer in suspension system of automobile and manufacture thereof |
| EP1252946A2 (en) * | 2001-04-25 | 2002-10-30 | Muhr und Bender KG | Method for producing rotationally symmetric parts |
| CN1684783A (en) * | 2002-09-26 | 2005-10-19 | 费尔斯有限公司 | Method and device for the production of a tubular workpiece, particularly a shock absorber piston rod, and such a workpiece |
| 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 |
| CN101176905A (en) * | 2003-12-22 | 2008-05-14 | 本田技研工业株式会社 | Method of forming member,valve guide and method of forming the same and method of forming tubular member |
| KR100790319B1 (en) * | 2007-06-21 | 2007-12-28 | 삼원산업 주식회사 | Method for processing automobile cowl cross bar using rotary swaging and the automobile cowl cross bar |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104668892A (en) * | 2013-12-02 | 2015-06-03 | 江西昌河航空工业有限公司 | Shell nosing machining technology method for pull rod of helicopter |
| CN104493035A (en) * | 2014-11-24 | 2015-04-08 | 西安创新精密仪器研究所 | Rotary swaging method for processing pull rods |
| CN112170773A (en) * | 2020-08-25 | 2021-01-05 | 福建龙溪轴承(集团)股份有限公司 | Light alloy non-revolving body special-shaped integral pull rod precision forging near-net forming technology |
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Application publication date: 20120718 |