CN111635984A - Handheld tension-torsion coupling cold extrusion strengthening device and method for hole - Google Patents
Handheld tension-torsion coupling cold extrusion strengthening device and method for hole Download PDFInfo
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- CN111635984A CN111635984A CN202010537185.5A CN202010537185A CN111635984A CN 111635984 A CN111635984 A CN 111635984A CN 202010537185 A CN202010537185 A CN 202010537185A CN 111635984 A CN111635984 A CN 111635984A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
- C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
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Abstract
The invention discloses a hole handheld pull-twist coupling cold extrusion strengthening device and a hole handheld pull-twist coupling cold extrusion strengthening method, wherein the hole handheld pull-twist coupling cold extrusion strengthening device comprises a core rod, a core rod connector, a driving screw rod, an outer sleeve, an outer hexagonal rotary piece and a locking cover; the threaded end of the core rod penetrates through the jacking head and is in threaded connection with one end of the core rod connector; the other end of the mandrel connector drives the screw to be in threaded connection; the periphery of the driving screw is in threaded connection with the outer sleeve, a step hole is formed in the center of the outer sleeve, and internal thread holes are formed in two ends of the step hole; the cylindrical end of the outer hexagonal rotating piece is in small clearance fit with the hole wall in the stepped hole of the outer sleeve; the outer hexagonal rotary piece is limited in the step hole of the outer sleeve through the threaded connection of the locking cover and the outer sleeve. The invention provides a fatigue strengthening device with small volume, simple structure and low economic cost for small-batch airplane connecting holes with poor openness, and effectively solves the problems of large structure, complex system and high price of the conventional cold extrusion strengthening device which adopts hydraulic pressure as stretching power.
Description
Technical Field
The invention belongs to the technical field of machining, and particularly relates to a handheld tension-torsion coupling cold extrusion strengthening device and a strengthening method for holes.
Background
In the aircraft manufacturing process, the mechanical connection structure exists in a large number, the fastener usage of an aircraft can reach hundreds of thousands to millions, and the mechanical connection structure cannot be replaced in the foreseeable future. However, in the service process of the aircraft structure, the aircraft structure often bears the fatigue load effect, the mechanical connecting hole breaks the continuity of the whole structure, causes stress concentration and is easy to have initial damage, and the mechanical connecting hole is a typical fatigue danger point of the whole structure in service. Therefore, how to improve the fatigue performance of the mechanical connecting hole, especially the key bearing connecting hole, is always an important research content for improving the reliability performance of the airplane.
The cold extrusion strengthening under the suitable strengthening capacity can obviously improve the fatigue performance of the mechanical connecting hole, has the advantages of not changing the structure size, not increasing extra weight and the like, and is one of the main strengthening means for strengthening the fatigue performance of the airplane hole structure at present. Cold extrusion strengthening is generally divided into direct cold extrusion and jacketed cold extrusion: the direct cold extrusion forces the connecting hole wall to generate plastic deformation by directly extruding the connecting hole wall through the core rod, the microstructure of the extruded hole wall material is improved, and beneficial residual compressive stress is formed on the hole wall, so that the fatigue performance of the hole is improved; the cold extrusion (such as slotting bush, pressing bush and the like) with the bush is the same as the fatigue life-increasing principle of direct cold extrusion, and only the core rod extrudes the bush firstly, and the bush expands and then further extrudes the hole wall, so that the hole wall damage can be effectively avoided, and the distribution uniformity of the residual stress is improved. No matter direct cold extrusion or cold extrusion with a bushing, a cold extrusion strengthening device is required to provide tension for the core rod in the strengthening process. The prior cold extrusion strengthening device usually adopts hydraulic pressure as stretching power, has large structure volume, complex system and high price, and for example, the utility model patent with the patent number of 201220713773.0 discloses a reinforced hardening cold extrusion machine for the surface of a rivet hole of a wing girder and the invention patent with the patent number of 201910749455.6 discloses a deep hole ultrasonic vibration impact strengthening device and a method. Although these inventions can achieve high quality cold extrusion strengthening of the holes, in practice, aircraft construction presents numerous less open assembly environments, and it is evident that a large structural strengthening device cannot be effectively used. In addition, in the maintenance process of the aircraft, the number of holes to be reinforced is usually small, the structural openness is poor, and in view of cost, expensive large-scale reinforcing equipment is not suitable. The invention of patent No. 201910637084.2 discloses a rotary hole cold extrusion strengthening device and method, which is significantly smaller than hydraulic cold extrusion strengthening equipment, but still has larger volume and difficult strengthening compared with many narrow operation environments in the aircraft manufacturing process, and the structure and operation process of the invention are complicated.
Disclosure of Invention
The invention aims to provide a hole handheld pulling-twisting coupling cold extrusion strengthening device and a strengthening method aiming at the defects in the prior art and the mechanical connecting holes of the airplane with small quantity and poor openness, so as to solve the problems of large structure volume, complex system and high price of the traditional cold extrusion strengthening device which adopts hydraulic pressure as stretching power.
In order to achieve the purpose, the invention adopts the technical scheme that:
a hole handheld pull-twist coupling cold extrusion strengthening device comprises a core rod, a core rod connector, a driving screw, an outer sleeve, an outer hexagonal screw and a locking cover; the threaded end of the core rod penetrates through the jacking head and is in threaded connection with one end of the core rod connector; the other end of the mandrel connector is in threaded connection with the driving screw; the periphery of the driving screw is in threaded connection with the outer sleeve, a step hole is formed in the center of the outer sleeve, and internal thread holes are formed in two ends of the step hole; the cylindrical end of the outer hexagonal rotating piece is in small clearance fit with the hole wall in the stepped hole of the outer sleeve; and the outer hexagonal screw is limited in the step hole of the outer sleeve through the threaded connection of the locking cover and the outer sleeve.
Preferably, the reinforcing heads of the mandrel cut off the sector cylindrical surface corresponding to the central angle along the length direction of the mandrel at the same central angle interval.
Preferably, the cylindrical boss end of one end of the mandrel connector is externally threaded, and the other end of the mandrel connector is provided with a central internally threaded hole.
Preferably, the mandrel connector is in threaded connection with the drive screw through the cylindrical boss end and with the mandrel through the central internal threaded hole.
Preferably, one end of the driving screw rod is provided with an internal threaded hole; the other end is in a hexagon socket shape, the hexagon socket shape is a round boss of the hexagon boss, and a left-handed inner threaded hole is formed in the center of the boss.
A handheld pull-twist coupling cold extrusion strengthening method for holes comprises the following steps:
A. cold extruding and strengthening the connecting hole without the lining;
B. and (4) carrying out cold extrusion strengthening on the connecting hole with the bushing.
Preferably, the cold extrusion strengthening of the connecting hole without the bushing in the step A comprises the following steps:
a1, the threaded end of the core rod passes through the hole to be reinforced and then passes through the center through hole of the supporting head to be in threaded connection with the core rod connector;
a2, connecting the mandrel connector with the drive screw through screw threads, and connecting the jacking head with the outer sleeve through screw threads;
a3, clamping the outer hexagonal rotating piece by using an outer hexagonal wrench, keeping the outer hexagonal rotating piece not to rotate circumferentially, inserting an inner hexagonal wrench into the inner hexagonal end of the driving screw, slowly rotating the inner hexagonal wrench at a constant speed, and driving the core rod to rotate to drive the core rod to do axial linear motion and circumferential rotary motion;
a4, after the reinforcing head of the core rod passes through the hole completely, completing one-time pulling-twisting coupling cold-pressurizing reinforcement, reversely rotating the driving screw rod to return the driving screw rod to the initial position, and detaching the core rod to complete one-time reinforcement;
a5, repeating the steps A1 to A4, and carrying out next strengthening.
Preferably, the cold extrusion strengthening of the lined connecting hole in the step B comprises the following steps:
b1, connecting the threaded end of the mandrel with the mandrel connector in a threaded manner, connecting the mandrel connector with the driving screw in a threaded manner, and connecting the jacking head with the outer sleeve in a threaded manner;
b2, sleeving the bushing on the mandrel, penetrating the head of the mandrel through the hole to be reinforced, and sliding the bushing into the hole to be reinforced;
b3, inserting an inner hexagonal wrench into the inner hexagonal end of the driving screw, keeping the driving screw circumferentially static, rotating an outer hexagonal rotating piece by adopting the outer hexagonal wrench, driving the core rod to linearly move by the driving screw, and stopping rotating the outer hexagonal rotating piece after the bushing is extruded and deformed by the core rod and fixed on the hole wall;
b4, keeping the outer hexagonal rotary piece circumferentially static, rotating the driving screw to drive the mandrel to axially linearly move and circumferentially rotate, and carrying out drawing-rotating coupling cold extrusion strengthening on the hole;
b5, when the strengthening head of the core rod completely passes through the hole, completing one-time tension-torsion coupling cold-pressurization strengthening, reversely rotating the driving screw rod, and enabling the driving screw rod to return to the initial position, namely completing one-time strengthening;
b6, repeating the steps B1 to B5, and carrying out next strengthening.
The handheld pulling-twisting coupling cold extrusion strengthening device and the strengthening method for the holes have the following beneficial effects:
according to the invention, through the mutual matching of the driving screw and the outer hexagonal rotating piece, the direct handheld pull-twist coupling cold extrusion of the hole and the pull-twist coupling handheld cold extrusion with the bushing hole are realized, a fatigue strengthening device with small volume, simple structure and low economic cost is provided for the airplane connecting holes with small batch and poor openness, and the problems of large structure volume, complex system and high price caused by the adoption of hydraulic pressure as stretching power in the conventional cold extrusion strengthening device are effectively solved.
In addition, the cylindrical surface of the core rod strengthening head is flattened at the same central angle interval, so that the strengthening resistance is reduced, and the strengthening difficulty and the hole wall damage degree are reduced; the distribution uniformity of the stress around the hole is improved by the tension-torsion coupling mode, and the fatigue life-prolonging effect of cold extrusion is favorably improved.
Drawings
FIG. 1 is a front view and a cross-sectional view of a handheld tension-torsion coupled cold extrusion intensifying apparatus for a bore.
FIG. 2 is an isometric view of a mandrel of a handheld draw-torque coupled cold extrusion strengthening apparatus for a hole.
FIG. 3 is an isometric view of a top holder of a hole hand-held tension-torsion coupled cold extrusion enhancement device.
FIG. 4 is an isometric view of a mandrel connector of a hole handheld draw-twist coupled cold extrusion fortifier.
FIG. 5 is an isometric view of an external hex driver of a hand-held draw-torque coupled cold extrusion fortifier for a bore.
Wherein, 1, a core rod; 2. supporting the head; 3. a mandrel connector; 4. a jacket; 5. an outer hexagonal screw; 6. a locking cover; 7. the screw is driven.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
According to one embodiment of the application, referring to fig. 1, the hand-held pull-twist coupling cold extrusion strengthening device for holes of the scheme comprises a mandrel 1, a jacking head 2, a mandrel connector 3, a driving screw 7, an outer sleeve 4, an outer hexagonal screw 5 and a locking cover 6.
The above components will be described in detail below:
referring to fig. 2, a mandrel 1, a reinforcing head of the mandrel 1 is cut flat on a cylindrical surface at the same interval of a central angle to reduce reinforcing resistance for extruding a hole to be reinforced.
Referring to fig. 4, the mandrel connector 3 is used for transition connection between the mandrel 1 and the driving screw 7, and is flange-like, the cylindrical boss end of the mandrel connector 3 is provided with external threads, the other end of the cylindrical boss end is provided with a central internal thread hole, and the mandrel connector 3 is designed into a plurality of models according to different external thread sizes of mandrels 1 of different models, and each model is only different in size of the central internal thread hole and is matched with the mandrels 1 of different models.
The driving screw 7 is used for driving the core rod 1 to do linear and rotary motion, is provided with a left-hand external thread, one end of the driving screw is provided with an internal thread hole, and the other end of the driving screw is in a hexagon socket shape; the outer hexagonal rotating piece 5 is used for driving the core rod 11 to do linear motion and is a circular boss with a hexagonal boss, and the center of the outer hexagonal rotating piece is provided with a left-handed inner threaded hole.
And the outer sleeve 4 is used for holding, the center of the outer sleeve is provided with a step hole, and two ends of the outer sleeve are provided with threaded holes.
And the locking cover 6 is used for covering the outer hexagonal rotating piece 5 in the outer sleeve 4 and is provided with a central through hole, and the small-diameter end is provided with an external thread.
Referring to fig. 3, the supporting head 2 is used for supporting a workpiece, and has a central through hole, and the columnar boss of the connecting end has external threads.
The connection relationship among the above-mentioned each part is:
the threaded end of the core rod 1 penetrates through the jacking head 2 and is in threaded connection with one end of the core rod connector 3, the other end of the core rod connector 3 is in threaded connection with a driving screw rod 7, and the periphery of the driving screw rod 7 is in threaded connection with the outer sleeve 4.
Referring to fig. 5, the central through hole of the holding head 2 passes through the core rod 1 and then is in threaded connection with the outer sleeve 4. A step hole is formed in the center in the outer sleeve 4, inner thread holes are formed in two ends of the step hole, the cylindrical end of the outer hexagonal rotating piece 5 is in small clearance fit with the hole wall in the step hole of the outer sleeve 4, and the outer hexagonal rotating piece 5 is limited in the step hole of the outer sleeve 4 through the threaded connection of the locking cover 6 and the outer sleeve 4.
According to one embodiment of the application, a handheld pull-twist coupling cold extrusion strengthening method for holes comprises the following steps:
A. cold extruding and strengthening the connecting hole without the lining;
B. and (4) carrying out cold extrusion strengthening on the connecting hole with the bushing.
Wherein, to the connecting hole cold extrusion of not taking the bush in A and strengthening, include:
step A1, the threaded end of the core rod 1 passes through the hole to be strengthened and then passes through the central through hole of the jacking head 2 to be in threaded connection with the core rod connector 3;
step A2, connecting the mandrel connector 3 with the driving screw 7 in a threaded manner, and connecting the jacking head 2 with the outer sleeve 4 in a threaded manner;
step A3, clamping the outer hexagonal rotating piece 5 by using an outer hexagonal wrench, keeping the outer hexagonal rotating piece 5 circumferentially non-rotating, inserting an inner hexagonal wrench into the inner hexagonal end of the driving screw 7, slowly rotating the inner hexagonal wrench at a constant speed, and driving the driving screw 7 to rotate to drive the core rod 1 to perform axial linear motion and circumferential rotary motion;
step A4, after the reinforcing head of the core rod 1 completely passes through the hole, completing one-time pulling-twisting coupling cold-pressurizing reinforcement, reversely rotating the driving screw 7 to enable the driving screw 7 to return to the initial position, and detaching the core rod 1 to complete one-time reinforcement;
step A5, repeat step A1 to step A4, proceed the next strengthening.
In B, the cold extrusion strengthening of the connecting hole with the lining comprises the following steps:
step B1, connecting the threaded end of the core rod 1 with the core rod connector 3 in a threaded manner, connecting the core rod connector 3 with the driving screw 7 in a threaded manner, and connecting the jacking head 2 with the outer sleeve 4 in a threaded manner;
step B2, sleeving the bush on the mandrel, enabling the head of the mandrel to penetrate through the hole to be reinforced, and sliding the bush into the hole to be reinforced;
step B3, inserting an inner hexagonal wrench into the inner hexagonal end of the driving screw 7, keeping the driving screw 7 circumferentially static, rotating the outer hexagonal rotating piece 5 by adopting the outer hexagonal wrench, driving the core rod 1 to linearly move by the driving screw 7, and stopping rotating the outer hexagonal rotating piece 5 after the bushing is extruded and deformed by the core rod 1 and fixed on the hole wall;
step B4, keeping the outer hexagonal rotary piece 5 circumferentially static, rotating the driving screw 7 to drive the mandrel to axially move linearly and circumferentially rotate, and carrying out drawing-spinning coupling cold extrusion strengthening on the hole;
step B5, when the strengthening head of the core rod 1 completely passes through the hole, completing one-time pulling-twisting coupling cold-pressurizing strengthening, reversely rotating the driving screw 7, and enabling the driving screw 7 to return to the initial position, namely completing one-time strengthening;
and B6, repeating the steps B1 to B5, and carrying out next strengthening.
According to the invention, through the mutual matching of the driving screw 7 and the outer hexagonal rotating piece 5, the direct handheld tension-torsion coupling cold extrusion of the hole and the tension-torsion coupling handheld cold extrusion with the bushing hole are realized, and a fatigue strengthening device with small volume, simple structure and low economic cost is provided for the small-batch airplane connecting holes with poor openness.
In addition, the cylindrical surface of the reinforcing head of the core rod 1 is flattened at the same central angle interval, so that the reinforcing resistance is reduced, and the reinforcing difficulty and the hole wall damage degree are reduced; the distribution uniformity of the stress around the hole is improved by the tension-torsion coupling mode, and the fatigue life-prolonging effect of cold extrusion is favorably improved.
While the embodiments of the invention have been described in detail in connection with the accompanying drawings, it is not intended to limit the scope of the invention. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the appended claims.
Claims (8)
1. The utility model provides a device is reinforceed in cold extrusion of coupling is pulled to hand-held type of hole, its characterized in that: comprises a core rod, a core rod connector, a driving screw rod, an outer sleeve, an outer hexagonal screw and a locking cover; the threaded end of the core rod penetrates through the jacking head and is in threaded connection with one end of the core rod connector; the other end of the mandrel connector is in threaded connection with the driving screw; the periphery of the driving screw is in threaded connection with the outer sleeve, a step hole is formed in the center of the outer sleeve, and internal thread holes are formed in two ends of the step hole; the cylindrical end of the outer hexagonal rotating piece is in small clearance fit with the hole wall in the stepped hole of the outer sleeve; and the outer hexagonal screw is limited in the step hole of the outer sleeve through the threaded connection of the locking cover and the outer sleeve.
2. The hole hand-held tension-torsion coupled cold extrusion enhancement device of claim 1, wherein: and the reinforcing heads of the core rod cut off the fan-shaped cylindrical surface corresponding to the central angle along the length direction of the core rod at the same central angle interval.
3. The hole hand-held tension-torsion coupled cold extrusion enhancement device of claim 1, wherein: the cylindrical boss end of one end of the mandrel connector is provided with an external thread, and the other end of the mandrel connector is provided with a central internal thread hole.
4. The hole hand-held tension-torsion coupled cold extrusion enhancement device of claim 3, wherein: the mandrel connector is in threaded connection with the driving screw rod through the cylindrical boss end and is in threaded connection with the mandrel through the central internal threaded hole.
5. The hole hand-held tension-torsion coupled cold extrusion enhancement device of claim 1, wherein: one end of the driving screw is provided with an internal threaded hole; the other end is in a hexagon socket shape, the hexagon socket shape is a round boss of the hexagon boss, and a left-handed inner threaded hole is formed in the center of the boss.
6. A method of hand-held tension-torsion coupled cold extrusion strengthening of a hole according to any of claims 1-5, comprising:
A. cold extruding and strengthening the connecting hole without the lining;
B. and (4) carrying out cold extrusion strengthening on the connecting hole with the bushing.
7. The method for reinforcing the hole by the handheld pulling-twisting coupling cold extrusion, according to claim 6, wherein the step A of reinforcing the connecting hole without the bushing by the cold extrusion comprises the following steps:
a1, the threaded end of the core rod passes through the hole to be reinforced and then passes through the center through hole of the supporting head to be in threaded connection with the core rod connector;
a2, connecting the mandrel connector with the drive screw through screw threads, and connecting the jacking head with the outer sleeve through screw threads;
a3, clamping the outer hexagonal rotating piece by using an outer hexagonal wrench, keeping the outer hexagonal rotating piece not to rotate circumferentially, inserting an inner hexagonal wrench into the inner hexagonal end of the driving screw, slowly rotating the inner hexagonal wrench at a constant speed, and driving the core rod to rotate to drive the core rod to do axial linear motion and circumferential rotary motion;
a4, after the reinforcing head of the core rod passes through the hole completely, completing one-time pulling-twisting coupling cold-pressurizing reinforcement, reversely rotating the driving screw rod to return the driving screw rod to the initial position, and detaching the core rod to complete one-time reinforcement;
a5, repeating the steps A1 to A4, and carrying out next strengthening.
8. The method for reinforcing the hole by the hand-held pulling-twisting coupling cold extrusion, according to claim 6, wherein the B-sleeved connecting hole is reinforced by the cold extrusion, and the method comprises the following steps:
b1, connecting the threaded end of the mandrel with the mandrel connector in a threaded manner, connecting the mandrel connector with the driving screw in a threaded manner, and connecting the jacking head with the outer sleeve in a threaded manner;
b2, sleeving the bushing on the mandrel, penetrating the head of the mandrel through the hole to be reinforced, and sliding the bushing into the hole to be reinforced;
b3, inserting an inner hexagonal wrench into the inner hexagonal end of the driving screw, keeping the driving screw circumferentially static, rotating an outer hexagonal rotating piece by adopting the outer hexagonal wrench, driving the core rod to linearly move by the driving screw, and stopping rotating the outer hexagonal rotating piece after the bushing is extruded and deformed by the core rod and fixed on the hole wall;
b4, keeping the outer hexagonal rotary piece circumferentially static, rotating the driving screw to drive the mandrel to axially linearly move and circumferentially rotate, and carrying out drawing-rotating coupling cold extrusion strengthening on the hole;
b5, when the strengthening head of the core rod completely passes through the hole, completing one-time tension-torsion coupling cold-pressurization strengthening, reversely rotating the driving screw rod, and enabling the driving screw rod to return to the initial position, namely completing one-time strengthening;
b6, repeating the steps B1 to B5, and carrying out next strengthening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010537185.5A CN111635984B (en) | 2020-06-12 | 2020-06-12 | Handheld tension-torsion coupling cold extrusion strengthening device and method for hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010537185.5A CN111635984B (en) | 2020-06-12 | 2020-06-12 | Handheld tension-torsion coupling cold extrusion strengthening device and method for hole |
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| Publication Number | Publication Date |
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| CN111635984A true CN111635984A (en) | 2020-09-08 |
| CN111635984B CN111635984B (en) | 2021-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010537185.5A Expired - Fee Related CN111635984B (en) | 2020-06-12 | 2020-06-12 | Handheld tension-torsion coupling cold extrusion strengthening device and method for hole |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112795772A (en) * | 2020-12-29 | 2021-05-14 | 北京航空航天大学 | Blind hole composite strengthening device and method based on laser shock strengthening and cold extrusion |
| CN112981067A (en) * | 2021-02-03 | 2021-06-18 | 四川大学 | Cold extrusion fatigue strengthening device and method for orifice with open pore structure |
| CN113617873A (en) * | 2021-08-16 | 2021-11-09 | 烟台安递飞戈材料疲劳技术有限公司 | Bushing and extrusion tool with same |
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| JPH05148536A (en) * | 1991-11-26 | 1993-06-15 | O S G Kk | Treatment for strengthening metallic surface |
| CN202164331U (en) * | 2011-06-08 | 2012-03-14 | 沈阳飞机工业（集团）有限公司 | Extruder |
| CN106516092A (en) * | 2016-11-07 | 2017-03-22 | 西安航空制动科技有限公司 | Guide sleeve for installing aircraft braking wheel |
| CN110408756A (en) * | 2019-07-15 | 2019-11-05 | 西北工业大学 | Rotary hole cold extrusion intensifying device and method |
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2020
- 2020-06-12 CN CN202010537185.5A patent/CN111635984B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05148536A (en) * | 1991-11-26 | 1993-06-15 | O S G Kk | Treatment for strengthening metallic surface |
| CN202164331U (en) * | 2011-06-08 | 2012-03-14 | 沈阳飞机工业（集团）有限公司 | Extruder |
| CN106516092A (en) * | 2016-11-07 | 2017-03-22 | 西安航空制动科技有限公司 | Guide sleeve for installing aircraft braking wheel |
| CN110408756A (en) * | 2019-07-15 | 2019-11-05 | 西北工业大学 | Rotary hole cold extrusion intensifying device and method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112795772A (en) * | 2020-12-29 | 2021-05-14 | 北京航空航天大学 | Blind hole composite strengthening device and method based on laser shock strengthening and cold extrusion |
| CN112795772B (en) * | 2020-12-29 | 2022-03-15 | 北京航空航天大学 | Blind hole composite strengthening device and method based on laser shock strengthening and cold extrusion |
| CN112981067A (en) * | 2021-02-03 | 2021-06-18 | 四川大学 | Cold extrusion fatigue strengthening device and method for orifice with open pore structure |
| CN113617873A (en) * | 2021-08-16 | 2021-11-09 | 烟台安递飞戈材料疲劳技术有限公司 | Bushing and extrusion tool with same |
| CN113617873B (en) * | 2021-08-16 | 2023-08-08 | 烟台安递飞戈材料疲劳技术有限公司 | Bushing and extrusion tool with same |
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| CN111635984B (en) | 2021-02-26 |
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