CN101412063A - Method for expanding high intensity steel tube - Google Patents
Method for expanding high intensity steel tube Download PDFInfo
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- CN101412063A CN101412063A CNA2008101828610A CN200810182861A CN101412063A CN 101412063 A CN101412063 A CN 101412063A CN A2008101828610 A CNA2008101828610 A CN A2008101828610A CN 200810182861 A CN200810182861 A CN 200810182861A CN 101412063 A CN101412063 A CN 101412063A
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- bulging
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- alicyclic ring
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Abstract
The invention belongs to a forming technique and relates to a bulging method of a high-strength steel pipe. The method using a polyurethane ring instead of the prior polyurethane stick can be operated quickly and conveniently as follows: loading of parts before bulging and unloading of parts after bulging can be carried out easily and quickly; to be loaded, the parts are inserted in a die cavity from an end without a core stick; to be unloaded after bulging, the equipment applying a forming force is provided with an automatic withdrawing device; when the equipment withdraws nearly 20cm, the clamping die can be taken out, so that the labor intensity of works is greatly lowered, the working efficiency is as much as more than 5 times higher than before; the forming quality of the parts is high: because the clamping die adopts segmented design, the parts are not clipped in the die cavity, and, after forming the parts are smooth, not scraped and have no abnormal deformation, and because the bulging technique has low state requirements on parts of the pipe except the bulging part, one end or both ends of a straight pipe in any length can be bulged, and the bended pipe can also be bulged, thereby improving the product quality, increasing qualification rate to 100 percent from original 60 percent.
Description
Technical field
The invention belongs to forming technique, relate to a kind of method for expanding high intensity steel tube.
Background technology
In helicopter control system, there are many important pipe part terminations to need bulging, to satisfy machined part or to become the assembling of annex to connect.Such as: just, copilot's feathering bend pipe, driving cabin collective-pitch lever, feathering pole socket etc.At present, traditional expanding method adopts the bulging of polyamine fat rod on hydraulic press mostly, to be packed in particular manufacturing craft 2 die cavitys of cored bar 5 by bulging part 4 earlier, again polyamine fat rod 3 is put into by the bulging part, support polyamine fat rod by mould plug 5, make punch 1 compression polyamine fat rod by hydraulic press pressure, polyamine fat rod is subjected to compression swelling, makes pipe reach the bulging purpose.The shortcoming that this kind expanding method exists is,
(1) die shut height is big, complex structure, and weight, volume are big, need forklift to assist during installation.
(2) behind the part bulging, often generation snaps in the bulging end die cavity, also can snap in the pipe after the polyamine fat fatigue, at this moment must dismantle frock from forcing press, decompose mould, when taking out pipe or polyamine fat by other aid, can cause the distortion of pipe major injury, cause product rejection.
When (3) tube length is less than 380mm, puts into or take out pipe and all need dismantle bulging end die body; Tube length is during greater than 380mm, and putting into or take out pipe all needs dismantle frock from workbench, dismantles bulging end die body then on the ground, takes out or put into part, and labor strength is very high, and operating efficiency is extremely low.
(4) because press pressure is big, polyamine fat fatiguability.The bulging amount is to control by the decrement (or briquetting stroke) of restriction polyamine fat, and along with the fatigue of polyamine fat, under the situation of identical decrement, its bulging power reduces, the bulging size instability of part.Just need to change polyamine fat during 5～7 products of every processing.
(5) the method only is applicable to the generally one end bulging of the straight tube between 200～500mm of part length.If length dimension is long, bend pipe or two ends all need bulging then can't moulding get only the suggestion design and should be other structures such as welding.
Summary of the invention
The purpose of this invention is to provide a kind of method for expanding high intensity steel tube of not limitting tube length, tubular shape and bulging position that is applicable to.Technical solution of the present invention is,
(1) according to being made the polyamine alicyclic ring by the dimensional requirement at bulging part bulging position, the external diameter one of polyamine alicyclic ring is complementary in the bulging part;
(2) according to being made plug by the bulging part, plug is step-like, the boss one end diameter of plug be complementary by the internal diameter of bulging part, the body of rod diameter of plug and the internal diameter of polyamine alicyclic ring are complementary, the length of polyamine alicyclic ring is 1/4 of plug length, and the body of rod one end of plug links to each other with the equipment that forming force is provided;
(3) according to by the size at bulging part bulging position with the structure fabrication pinching tire of clamping force equipment is provided, the type tire adopts the design of taper distinguish, the inner chamber of type tire is with consistent by the size behind the bulging part bulging, and the profile of type tire is corresponding with the structure that forming force equipment is provided;
(4) will be installed on the pinching tire by the bulging part, the polyamine alicyclic ring will be enclosed within on the plug body of rod, again plug will be connected with the equipment that forming force is provided, will be equipped with again by the pinching tire of bulging part and be installed on the plug that is with the polyamine alicyclic ring;
(5) according to set the pulling force that forming force equipment is provided by the wall thickness of bulging part, caliber and bulging size, under the pulling force effect, plug axial compression polyamine fat, polyamine fat are subjected to compression swelling and will be expanded into pinching tire inner chamber and identical with pinching tire inner chamber by the bulging position of bulging part.
The thickness of described polyamine alicyclic ring is 8mm～12mm, and length adds 10mm on by the basis of bulging length.
Described bulging size comprises the length and the bulging amount at bulging position.
Advantage that the present invention has and beneficial effect
The present invention adopts the polyamine alicyclic ring to substitute existing polyamine fat rod, makes
(1) mould structure is simple, and volume is little, and is in light weight.The volume of a whole set of mould has only 1/20 of original mould, and mould handling is convenient: provide the equipment work top of forming force low, mould is installed, dismounting is very convenient, only needs worker's one hand can easily bring up to work top.
(2) operation is extremely efficient and convenient: before the part bulging pack into and bulging after taking-up all very simple and quick.Needing only never when part is packed into, the plug end inserts pinching tire inner chamber.And when taking out part behind the bulging, provide the equipment of forming force that automatic extractor is arranged, and withdrawing from about 20mm and can take out taper distinguish pinching tire, labor strength reduces greatly, and operating efficiency and height are original more than 5 times.
(3) part forming quality height: because die cavity adopts the distinguish design, part can be not stuck in die cavity, the smooth nothing of part scratches after being shaped, no abnormal distortion, and,, also can carry out bulging to the pipe after the bending so both can carry out bulging to the straight tube one or both ends of random length because this Bulging Technology is less demanding to the state beyond the pipe bulging position, improved product quality greatly, qualification rate brings up to 100% by original 60%.
(4) formulation of technological parameter is simple: during shaping, can directly reflect the compression stress of polyamine fat along the tube axis direction by the equipment that forming force is provided, as long as thereby regulate the demonstration reading that the equipment of forming force dial plate is provided in practical operation.
(5) life-span of polyamine alicyclic ring is long: through repeatedly using, along with the fatigue of polyamine fat, its anisotropy degree reduces, and same big axial force produces bigger radial load, makes that the part bulging size is bigger, and shape is more complete.Make that like this life-span of polyamine alicyclic ring is longer, can process the product more than 20 continuously, and product size is very stable.
(6) can make things convenient for nondestructively repeatedly and be shaped: even once-forming is not in place, can carry out secondary or more times is done over again, can not cause any damage, save raw material part.
(7) scope of application is wide: can carry out bulging to all types of pipe bulgings, i.e. and an end bulging, two ends bulging, bend pipe bulging, and tube length is not subjected to any restriction.
(8) can shared mould: for the bulging of the identical various types of pipes of specification, can a shared mold, and mould structure is extremely simple, can save a considerable mould manufacturing expense.
Description of drawings
Fig. 1 is a prior art shaping schematic view of the present invention;
Fig. 2 is a shaping schematic view of the present invention.
The specific embodiment
(1) according to being made polyamine alicyclic ring 7 by the dimensional requirement at bulging part bulging position, the external diameter one of polyamine alicyclic ring is complementary in the bulging part 6;
(2) according to being made plug 9 by the bulging part, plug is step-like, the boss one end diameter of plug be complementary by the internal diameter of bulging part 6, the body of rod diameter of plug and the internal diameter of polyamine alicyclic ring 7 are complementary, the length of polyamine alicyclic ring is 1/4 of plug length, and the body of rod one end of plug links to each other with the equipment that forming force is provided;
(3) according to by the size at bulging part bulging position with the structure fabrication pinching tire 8 of forming force equipment is provided, the type tire adopts the design of taper distinguish, the inner chamber of type tire is with consistent by the size behind bulging part 6 bulgings, and the profile of type tire is corresponding with the structure that forming force equipment is provided;
(4) will be installed on the pinching tire by the bulging part, the polyamine alicyclic ring will be enclosed within on the plug body of rod, again plug will be connected with the equipment that forming force is provided, will be equipped with again by the pinching tire of bulging part and be installed on the plug that is with the polyamine alicyclic ring;
(5) according to set the pulling force that forming force equipment is provided by the wall thickness of bulging part, caliber and bulging size, under the pulling force effect, plug axial compression polyamine fat, polyamine fat are subjected to compression swelling and will be expanded into pinching tire inner chamber and identical with pinching tire inner chamber by the bulging position of bulging part.
The thickness of described polyamine alicyclic ring is 5mm～10mm, and length adds 15mm on by the basis of bulging length.
Described bulging size comprises the length and the bulging amount at bulging position.
The installation of mould and the course of work are: the bulging plug is by being threaded in the pressurized strut that forming force equipment is provided.To be equipped with again by the pinching tire of bulging part and be installed on the plug that is with the polyamine alicyclic ring, plug is connected with the equipment that forming force is provided by jointing, under the pulling force effect, plug axial compression polyamine fat, polyamine fat is subjected to compression swelling and will be expanded into pinching tire inner chamber and identical with pinching tire inner chamber by the bulging position of bulging part, thereby reaches the purpose of pipe bulging.
Embodiment one
By bulging part material specification is 15CrMnMoVA G36 * 1, and bulging length is 34mm, and the bulging amount is φ 37.5mm, and part is a crooked back bulging.
Can't carry out bulging with traditional expanding method.
Adopt implementer's case of the present invention to be:
1, make the polyamine alicyclic ring, polyamine alicyclic ring external diameter is φ 34mm, and internal diameter is φ 24mm, and thickness is 5mm, and length is 49mm.
2, make plug, plug is step-like, and the boss one end diameter of plug is φ 33.9mm, and the body of rod diameter of plug is φ 23.9mm, and length is 196mm, and the body of rod one end of plug links to each other with the equipment that forming force is provided, and connecting thread is M16 * 2;
3, according to by the size at bulging part bulging position with the structure fabrication pinching tire of clamping force equipment is provided, the type tire adopts the design of taper distinguish, the inner chamber of type tire is with consistent by the size behind the bulging part bulging, and the profile of type tire is corresponding with the structure that forming force equipment is provided;
4, will be installed on the pinching tire by the bulging part, the polyamine alicyclic ring will be enclosed within on the plug body of rod, again plug will be connected with the equipment that forming force is provided, will be equipped with again by the pinching tire of bulging part and be installed on the plug that is with the polyamine alicyclic ring;
5, be 3.2T according to being provided the pulling force of forming force equipment by the wall thickness of bulging part, caliber and bulging size setting, under the effect of 3.2T pulling force, plug axial compression polyamine fat, polyamine fat are subjected to compression swelling and will be expanded into pinching tire inner chamber and identical with pinching tire inner chamber by the bulging position of bulging part.
Embodiment two
By bulging part material specification is 15CrMnMoVA G32 * 2, and bulging length is 28mm, and the bulging amount is φ 34mm, and part is straight tube one an end bulging.
Carry out bulging with traditional expanding method, difficulty is bigger.
Adopt implementer's case of the present invention to be:
1, make the polyamine alicyclic ring, polyamine alicyclic ring external diameter is φ 28mm, and internal diameter is φ 15mm, and thickness is 6.5mm, and length is 43mm.
2, make plug, plug is step-like, and the boss one end diameter of plug is φ 27.9mm, and the body of rod diameter of plug is φ 14.9mm, and length is 172mm, and the body of rod one end of plug links to each other with the equipment that forming force is provided, and connecting thread is M14 * 2;
3, according to by the size at bulging part bulging position with the structure fabrication pinching tire of clamping force equipment is provided, the type tire adopts the design of taper distinguish, the inner chamber of type tire is with consistent by the size behind the bulging part bulging, and the profile of type tire is corresponding with the structure that forming force equipment is provided;
4, will be installed on the pinching tire by the bulging part, the polyamine alicyclic ring will be enclosed within on the plug body of rod, again plug will be connected with the equipment that forming force is provided, will be equipped with again by the pinching tire of bulging part and be installed on the plug that is with the polyamine alicyclic ring;
5, be 4.5T according to being provided the pulling force of forming force equipment by the wall thickness of bulging part, caliber and bulging size setting, under the effect of 4.5T pulling force, plug axial compression polyamine fat, polyamine fat are subjected to compression swelling and will be expanded into pinching tire inner chamber and identical with pinching tire inner chamber by the bulging position of bulging part.
Embodiment three
By bulging part material specification is 30CrMnSiA G30 * 1, and bulging length is 40mm, and the bulging amount is φ 34mm, and part is the two ends bulging.
Can't carry out bulging with traditional expanding method.
Adopt implementer's case of the present invention to be
1, make the polyamine alicyclic ring, polyamine alicyclic ring external diameter is φ 28mm, and internal diameter is φ 17mm, and thickness is 5.5mm, and length is 55mm.
2, make plug, plug is step-like, and the boss one end diameter of plug is φ 27.9mm, and the body of rod diameter of plug is φ 16.9mm, and length is 220mm, and the body of rod one end of plug links to each other with the equipment that forming force is provided, and connecting thread is M16 * 2;
3, according to by the size at bulging part bulging position with the structure fabrication pinching tire of clamping force equipment is provided, the type tire adopts the design of taper distinguish, the inner chamber of type tire is with consistent by the size behind the bulging part bulging, and the profile of type tire is corresponding with the structure that forming force equipment is provided;
4, will be installed on the pinching tire by the bulging part, the polyamine alicyclic ring will be enclosed within on the plug body of rod, again plug will be connected with the equipment that forming force is provided, will be equipped with again by the pinching tire of bulging part and be installed on the plug that is with the polyamine alicyclic ring;
5, be 5.1T according to being provided the pulling force of forming force equipment by the wall thickness of bulging part, caliber and bulging size setting, under the effect of 5.1T pulling force, plug axial compression polyamine fat, polyamine fat are subjected to compression swelling and will be expanded into pinching tire inner chamber and identical with pinching tire inner chamber by the bulging position of bulging part.
Claims (3)
1. a method for expanding high intensity steel tube is characterized in that,
(1) according to being made the polyamine alicyclic ring by the dimensional requirement at bulging part bulging position, the external diameter one of polyamine alicyclic ring is complementary in the bulging part;
(2) according to being made plug by the bulging part, plug is step-like, the boss one end diameter of plug be complementary by the internal diameter of bulging part, the body of rod diameter of plug and the internal diameter of polyamine alicyclic ring are complementary, the length of polyamine alicyclic ring is 1/4 of plug length, and the body of rod one end of plug links to each other with the equipment that forming force is provided;
(3) according to by the size at bulging part bulging position with the structure fabrication pinching tire of clamping force equipment is provided, the type tire adopts the design of taper distinguish, the inner chamber of type tire is with consistent by the size behind the bulging part bulging, and the profile of type tire is corresponding with the structure that forming force equipment is provided;
(4) will be installed on the pinching tire by the bulging part, the polyamine alicyclic ring will be enclosed within on the plug body of rod, again plug will be connected with the equipment that forming force is provided, will be equipped with again by the pinching tire of bulging part and be installed on the plug that is with the polyamine alicyclic ring;
(5) according to set the pulling force that forming force equipment is provided by the wall thickness of bulging part, caliber and bulging size, under the pulling force effect, plug axial compression polyamine alicyclic ring, polyamine alicyclic ring are subjected to compression swelling and will be expanded into pinching tire inner chamber and identical with pinching tire inner chamber by the bulging position of bulging part.
2. method for expanding high intensity steel tube according to claim 1 is characterized in that, the thickness of described polyamine alicyclic ring is 5mm～10mm, and length adds 15mm on by the basis of bulging length.
3. method for expanding high intensity steel tube according to claim 1 is characterized in that, described bulging size comprises the length and the bulging amount at bulging position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101828610A CN101412063A (en) | 2008-12-11 | 2008-12-11 | Method for expanding high intensity steel tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101828610A CN101412063A (en) | 2008-12-11 | 2008-12-11 | Method for expanding high intensity steel tube |
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| CN101412063A true CN101412063A (en) | 2009-04-22 |
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| CNA2008101828610A Pending CN101412063A (en) | 2008-12-11 | 2008-12-11 | Method for expanding high intensity steel tube |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101551244B (en) * | 2009-05-18 | 2010-09-29 | 哈尔滨工业大学 | Squeeze-expanding test method of tube deformation performance |
| CN104511505A (en) * | 2013-09-30 | 2015-04-15 | 哈尔滨飞机工业集团有限责任公司 | Method of forming curved tube |
| CN105945860A (en) * | 2016-05-06 | 2016-09-21 | 江西昌河航空工业有限公司 | Rubber hose assembling device |
| CN109382450A (en) * | 2018-11-12 | 2019-02-26 | 袁海环 | Pipe joint molding machine |
| CN114311625A (en) * | 2021-11-26 | 2022-04-12 | 昌河飞机工业（集团）有限责任公司 | Device and method for expanding end of large-diameter guide pipe of helicopter |
-
2008
- 2008-12-11 CN CNA2008101828610A patent/CN101412063A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101551244B (en) * | 2009-05-18 | 2010-09-29 | 哈尔滨工业大学 | Squeeze-expanding test method of tube deformation performance |
| CN104511505A (en) * | 2013-09-30 | 2015-04-15 | 哈尔滨飞机工业集团有限责任公司 | Method of forming curved tube |
| CN105945860A (en) * | 2016-05-06 | 2016-09-21 | 江西昌河航空工业有限公司 | Rubber hose assembling device |
| CN109382450A (en) * | 2018-11-12 | 2019-02-26 | 袁海环 | Pipe joint molding machine |
| CN114311625A (en) * | 2021-11-26 | 2022-04-12 | 昌河飞机工业（集团）有限责任公司 | Device and method for expanding end of large-diameter guide pipe of helicopter |
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Open date: 20090422 |