CN103454061A - Test system and method for manufacturing metal sheet impact pit with specified dimension - Google Patents
Test system and method for manufacturing metal sheet impact pit with specified dimension Download PDFInfo
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- CN103454061A CN103454061A CN2013103615484A CN201310361548A CN103454061A CN 103454061 A CN103454061 A CN 103454061A CN 2013103615484 A CN2013103615484 A CN 2013103615484A CN 201310361548 A CN201310361548 A CN 201310361548A CN 103454061 A CN103454061 A CN 103454061A
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Abstract
The invention discloses a test system for manufacturing a metal sheet impact pit with the specified dimension. The test system is composed of a base, a test part, a pressing plate, an impact block, a circular hole cushion block, a rubber gasket and a support. The support is perpendicularly erected on the base and is fixedly connected with the base through reinforcing ribs, the circular hole cushion block is arranged in a rectangular groove in the base, the test part, the rubber gasket and the pressing plate are sequentially arranged on the circular hole cushion block, and the impact block is suspended in the middle of the support. The test method for manufacturing the metal sheet impact pit with the specified dimension comprises five steps. The test system can be used for impacting on a metal sheet, manufacture the pit with the specified dimension, ensure that the surface of the impacted metal sheet is smooth and free of scratching, be used for a test for simulating the pit, caused by low-speed impacting such as tool falling or bird striking, in the real metal sheet structure like the aircraft skin in the actual use process, and lay the foundation of further estimating the safety influences of the pit on the metal sheet.
Description
Technical field
The invention provides a kind of pilot system and method for testing of manufacturing sheet metal given size impact dent, belong to the experimental test technical field.
Background technology
Object acts on structure and just produces and impact with certain speed within very short time, and causes shock load, and the stress that shock load produces is called shock stress, the material and the structural damage that because of impact, cause can be found everywhere, such as, aircraft in flight course because of hail, bird hit or in maintenance process casual instrument drop all can be on structural member or covering, produce impact injury to a certain degree, it is characterized in that leaving impact dent at structural member or skin-surface, can say, the size of impact dent has represented the size of impact injury and impact energy in a sense, therefore, be necessary to manufacture the impact dent of given size on material or structure, for studying its impact on static strength and fatigue strength performance, set up the relation of dimple size and static strength and fatigue strength, formulate rational maintenance policy.At present, composite-material laminates impulse test technology is more ripe with the device development, and formed the impulse test standard, but, to utilizing the experimental technique of impacting the pit of manufacturing the sheet metal given size still immature with device, rarely have the report of technical research in this respect both at home and abroad, for this reason, the present invention has developed a kind of pilot system of manufacturing the impact dent of sheet metal given size, manufactures specially the pit of sheet metal given size, for the formulation of maintenance policy provides technical support.
Summary of the invention
The object of the present invention is to provide a kind of pilot system and method for testing of manufacturing sheet metal given size impact dent, with the impact dent for the manufacture of the sheet metal given size.
The technical solution adopted in the present invention is as follows:
1) a kind of pilot system of manufacturing sheet metal given size impact dent of the present invention, it is comprised of base, testpieces, pressing plate, impact block, circular hole cushion block, rubber sheet gasket and support, and the position annexation between them is: support vertical stands on base and is connected with reinforcement and base; The circular hole cushion block is placed in the base rectangular recess, places successively testpieces, rubber sheet gasket and pressing plate on it, and impact block hangs on the mid-stent position.
Described base is hardware, and it is formed by connecting by a rectangular steel plates and 4 angle steel supporting legs; The rectangular steel plates middle part is provided with the rectangular recess of placing the circular hole cushion block, and the rectangular recess middle part is provided with a circular hole.
Described testpieces is a rectangular steel plates, and its middle part is provided with a circular hole (such as 20 millimeters of diameters), uniform four circular holes of plate surrounding;
Described pressing plate is the rectangular steel plates of two long sideband bent side recesses;
Described impact block is cylindrical member with the level; The one end is double-screw bolt, and the other end is hemispherical.
Described circular hole cushion block is the rectangle plate of surrounding band circular arc, center band circular hole;
Described rubber sheet gasket is the rectangular rubber plate of the uniform circular hole of surrounding, center band circular hole;
Described support is the Π font framework of being made by section bar, and its bottom is connected with reinforcement and base.
The principle of this pilot system and operating mode brief introduction are as follows:
In engineering, the size of sheet metal impact dent is normally defined the ratio of pit root diameter (RD) and the degree of depth, therefore, this pilot system is by the mode of selected base cushion block Circularhole diameter and adjustment impact block height, manufacture the pit of regulation root diameter (RD) and the degree of depth, thereby obtain the impact dent of given size (stipulating the ratio of pit root diameter (RD) and the degree of depth).
Because sheet metal produces plastic yield because of impact along base cushion block circular hole, form pit, that is to say, Circularhole diameter determines pit root diameter (RD) size, Circularhole diameter is too large, can produce size effect, causes the pit root not identical along the diameter of testpieces length and Width.Generally, need to determine the base cushion block Circularhole diameter that does not produce size effect according to sheet metal testpieces size, be Circularhole diameter should be not more than sheet metal testpieces width 1/4, like this, the pit root of manufacturing is identical along the diameter of testpieces length and Width, thereby, can manufacture the pit of regulation root diameter (RD).
Adjust the height of impact block, and the smooth guide on support glides, impact pressing plate and be fixed on the testpieces on base, final, can manufacture the impact dent of sheet metal testpieces prescribed depth.
This pilot system only limits to the low-velocity impact damage test simulation (being the manufacture of spheroidal pit) of sheet metal, is not useable for the low-velocity impact damage simulation of metal material or Thick Composite.
2) a kind of method of testing of manufacturing sheet metal given size impact dent pilot system of the present invention, the method concrete steps are as follows:
Advantage and effect: pilot system provided by the invention can be for impacting sheet metal, can manufacture the pit of given size, metal sake surface (except pit) after guaranteeing again to impact is smooth, the nothing scratch, can be used for that test simulation real metal thin-slab construction (as the aircraft covering) drops because of instrument in actual use or pit that the low velocity impact such as bird strike causes, for further assessment pit lays the foundation to the sheet metal Safety Effect.
The accompanying drawing explanation
Below in conjunction with accompanying drawing and example, the present invention is further described.
Fig. 1 pilot system one-piece construction figure.
In Fig. 1: 1. base, 2. testpieces, 3. pressing plate, 4. impact block, 5. support.
Fig. 2 impact head structural drawing.
Fig. 3 understructure figure.
Fig. 4 circular hole cushion block structure figure.
Fig. 5 rubber sheet gasket structural drawing.
Fig. 6 impulse test part figure.
Fig. 7 pressure plate structure figure.
Fig. 8 base schematic diagram.
In Fig. 8: 1. base, 6. circular hole cushion block, 7. rubber sheet gasket, 2. testpieces, 3. pressing plate.
Embodiment
In conjunction with Fig. 1 and Fig. 8, the specific embodiment of the present invention is described.
1) in Fig. 1, a kind of pilot system of manufacturing sheet metal given size impact dent of the present invention, it is comprised of base 1, testpieces 2, pressing plate 3, impact block 4, circular hole cushion block 6, rubber sheet gasket 7 and support 5, and the position annexation between them is: support 5 vertically stands on base 1 and is connected with reinforcement and base 1; Circular hole cushion block 6 is placed in base 1 rectangular recess, places successively testpieces 2,7 of rubber blankets and pressing plate 3 on it, and impact block 4 hangs on support 5 medium positions.
Principle of work is as follows: impact block 4 glides along the smooth guide on support 5, impacts pressing plate and is fixed on the testpieces 2 on base 1 for 3 times, realizes testpieces is manufactured the purpose of the impact dent of given size.
Fig. 8 has described the detailed construction of pilot system base.Remainder after this base 1 can guaranty money's metal thin plate impacts except pit still keeps showing smooth, and does not produce scratch, only produces the pit of a spherical shape.The cushion block of circular hole cushion block 6 for containing center hole, surrounding chamfering shown in Fig. 4.A square opening is contained in base 1 central authorities shown in Fig. 3, and its size and circular hole cushion block 6 are measure-alike, and circular hole cushion block 6 can be put into base 1 square opening like this, can make sheet metal only in circular hole cushion block 6 center hole zones, produce the spheroidal distortion when being subject to impacting.The rubber sheet gasket 7 with testpieces 2 position marks shown in Fig. 5 is laid on base 1, its circular hole size is identical with the circular hole of circular hole cushion block 6, in the lay process, rubber sheet gasket 7 circular holes are aimed to the circular hole of base 1 and circular hole cushion block 6, can be guaranteed that center of circular hole and impact head are coaxial; Rubber sheet gasket 7 effects are to prevent from impacting rear sheet metal back surfaces because of impact, not produce scratch.Testpieces shown in Fig. 62 is placed in the boxed area of marker location of rubber sheet gaskets, with impact head shown in warranty test part 2 centers and base 1 and Fig. 2 on same axis.Pressing plate 3 shown in Fig. 7 is for fixing sample, and pressing plate 3 surroundings are bolted on base 1, and guaranty money's metal thin plate still keeps smooth (except pit portion) after impacting, and does not subside.
In addition, in the pit manufacture of sheet metal test, sheet metal testpieces 2(is as shown in Figure 6) design very crucial, must there is enough width in warranty test part middle part, if middle part is too narrow, can't obtain the impact dent of ideal form and given size.
2) a kind of method of testing of manufacturing sheet metal given size impact dent pilot system of the present invention, the method concrete steps are as follows:
By above-mentioned five steps, by adjusting the mode of base circular hole cushion block 6 Circularhole diameters and impact block 4 height, manufacture the impact dent of regulation root diameter (RD) and the degree of depth, thereby obtain the impact dent of given size (stipulating the ratio of pit root diameter (RD) and the degree of depth)
Claims (2)
1. a pilot system of manufacturing sheet metal given size impact dent, it is characterized in that: it is comprised of base, testpieces, pressing plate, impact block, circular hole cushion block, rubber sheet gasket and support, and support vertical stands on base and is connected with reinforcement and base; The circular hole cushion block is placed in the base rectangular recess, places successively testpieces, rubber sheet gasket and pressing plate on it, and impact block hangs on the mid-stent position;
Described base is hardware, and it is formed by connecting by a rectangular steel plates and 4 angle steel supporting legs; The rectangular steel plates middle part is provided with the rectangular recess of placing the circular hole cushion block, and the rectangular recess middle part is provided with a circular hole;
Described testpieces is a rectangular steel plates, and its middle part is provided with a circular hole, uniform four circular holes of plate surrounding;
Described pressing plate is the rectangular steel plates of two long sideband bent side recesses;
Described impact block is cylindrical member with the level; The one end is double-screw bolt, and the other end is hemispherical;
Described circular hole cushion block is the rectangle plate of surrounding band circular arc, center band circular hole;
Described rubber sheet gasket is the rectangular rubber plate of the uniform circular hole of surrounding, center band circular hole;
Described support is the Π font framework of being made by section bar, and its bottom is connected with reinforcement and base.
2. a method of testing of manufacturing sheet metal given size impact dent pilot system, it is characterized in that: the method concrete steps are as follows:
Step 1: design and manufacture impact head, support, the base of impact block, different size, circular hole cushion block, rubber sheet gasket and the pressing plate part of base, these Assembly of the parts are in aggregates, form pilot system;
Step 2: the middle position of base being laid to pilot system is that impact head is aimed at the centre hole of base hole, the circular hole cushion block is installed, and lay is with the rubber sheet gasket of mark test part placement location mark, the base center is accurately aimed at assurance sample center, and prevents that sample from causing galled spots because of shock-produced deformation; Again sheet metal is placed in the testpieces mark line of rubber sheet gasket; Finally, with the steel pressing plate, fix, the remainder after guaranty money's metal thin plate impacts except impact dent does not subside, and still keeps smooth;
Step 3: impact block is lifted to predetermined altitude and discharge, impact block will, along vertical guide rail free-falling, impact the sheet metal sample; In experimentation, guarantee not occur secondary pulse, after occurring to impact for the first time, adopt both hands to hold impact block, prevent secondary pulse;
Step 4: take off the sheet metal after impact, utilize vernier caliper and steel ruler to be measured and perform record to pit depth and pit diameter; Pit depth is defined as from the pit minimum point to the distance between the thin plate surface level, and steel ruler is horizontal on pit, and the distance with vernier caliper measurement steel ruler upper surface to the pit minimum point, deduct steel ruler thickness by reading and be pit depth; Pit diameter is defined as the diameter that the circular vestige of spheroidal bulge root is impacted at the sheet metal back, adopts vernier caliper can measure this diameter;
Step 5, according to the measurement result of dimple size, adjust the shock height of impact block, and repetitive shock test and dimple size measuring process, until obtain the impact dent of given size.
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| CN201310361548.4A CN103454061B (en) | 2013-08-19 | 2013-08-19 | A kind of pilot system and method for testing manufacturing sheet metal given size impact dent |
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| CN201310361548.4A CN103454061B (en) | 2013-08-19 | 2013-08-19 | A kind of pilot system and method for testing manufacturing sheet metal given size impact dent |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104316459A (en) * | 2014-11-25 | 2015-01-28 | 三友（天津）高分子技术有限公司 | Automatic detection impact testing machine of high-strength structural adhesive for automobile and method |
| CN104990814A (en) * | 2015-06-23 | 2015-10-21 | 哈尔滨工程大学 | Impact test device and test method for nuclear power station U-shaped pole type anti-flinging piece |
| CN105022919A (en) * | 2015-07-06 | 2015-11-04 | 北京航空航天大学 | Method for predicting size of low-speed impact dent of circular metal sheet |
| CN106932193A (en) * | 2017-04-27 | 2017-07-07 | 聊城鑫泰机床有限公司 | A kind of robot Portable vertical deformation detection mechanism |
| CN108398223A (en) * | 2018-01-17 | 2018-08-14 | 西安理工大学 | A kind of heavy duty vertical impact testing equipment |
| JP2019030505A (en) * | 2017-08-08 | 2019-02-28 | 株式会社プロギア | Rigidity characteristic measurement device |
| CN111024526A (en) * | 2019-12-30 | 2020-04-17 | 北海市龙浩光电科技有限公司 | Ring strikes fixed detection device |
| CN112798211A (en) * | 2020-12-29 | 2021-05-14 | 中国航空工业集团公司西安飞机设计研究所 | Equivalent clamping device for bird impact resistance test |
| CN112881203A (en) * | 2021-01-15 | 2021-06-01 | 北京航空航天大学 | Preparation device and method for foreign object damage notch of blade leading edge simulation piece |
| CN113435078A (en) * | 2021-05-25 | 2021-09-24 | 中国航空工业集团公司沈阳飞机设计研究所 | Composite material laminated plate impact damage assessment method |
| CN114781234A (en) * | 2022-06-20 | 2022-07-22 | 中国飞机强度研究所 | Method for determining thickness of vulnerable structure equivalent target for aircraft impact dynamics test |
| CN115628994A (en) * | 2022-12-23 | 2023-01-20 | 上海航空材料结构检测股份有限公司 | Composite material R region impact damage introduction and damage depth measurement method |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN111024526A (en) * | 2019-12-30 | 2020-04-17 | 北海市龙浩光电科技有限公司 | Ring strikes fixed detection device |
| CN112798211A (en) * | 2020-12-29 | 2021-05-14 | 中国航空工业集团公司西安飞机设计研究所 | Equivalent clamping device for bird impact resistance test |
| CN112881203A (en) * | 2021-01-15 | 2021-06-01 | 北京航空航天大学 | Preparation device and method for foreign object damage notch of blade leading edge simulation piece |
| CN112881203B (en) * | 2021-01-15 | 2022-03-15 | 北京航空航天大学 | Preparation device and method for foreign object damage notch of blade leading edge simulation piece |
| CN113435078A (en) * | 2021-05-25 | 2021-09-24 | 中国航空工业集团公司沈阳飞机设计研究所 | Composite material laminated plate impact damage assessment method |
| CN113435078B (en) * | 2021-05-25 | 2024-06-07 | 中国航空工业集团公司沈阳飞机设计研究所 | Impact damage assessment method for composite material laminated plate |
| CN114781234A (en) * | 2022-06-20 | 2022-07-22 | 中国飞机强度研究所 | Method for determining thickness of vulnerable structure equivalent target for aircraft impact dynamics test |
| CN114781234B (en) * | 2022-06-20 | 2022-09-13 | 中国飞机强度研究所 | Method for determining thickness of vulnerable structure equivalent target for aircraft impact dynamics test |
| CN115628994A (en) * | 2022-12-23 | 2023-01-20 | 上海航空材料结构检测股份有限公司 | Composite material R region impact damage introduction and damage depth measurement method |
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