CN202119669U - Auxiliary experimental structure for measuring pure bending of beams on universal material testing machine - Google Patents
Auxiliary experimental structure for measuring pure bending of beams on universal material testing machine Download PDFInfo
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- CN202119669U CN202119669U CN2011202462990U CN201120246299U CN202119669U CN 202119669 U CN202119669 U CN 202119669U CN 2011202462990 U CN2011202462990 U CN 2011202462990U CN 201120246299 U CN201120246299 U CN 201120246299U CN 202119669 U CN202119669 U CN 202119669U
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Abstract
An auxiliary experimental structure for measuring pure bending of beams on a universal material testing machine belongs to the type of machinery and is formed by improvement of material testing formed by a testing machine base, a testing machine ball screw, a testing machine movable cross beam, a testing machine three-point bending bracket, a beam for an experiment, a testing machine fixed cross beam, a bending pressure head and a component support. The main point is that an auxiliary pure bending pressure plate is added between the beam for the experiment of a tested member and the a pressing head of the testing machine, a convex contact portion acted on the beam for the experiment is arranged at one end of the auxiliary pure bending pressure plate, and the other convex contact portion is arranged at the other end of the auxiliary pure bending pressure plate, and the shape of the cross section of the auxiliary pure bending pressure plate is in a rectangular shape or a trapezoid. The auxiliary experimental structure solves the problem that a pure bending experiment of the beam cannot not be conducted on a material testing machine, and has good practical applicability.
Description
Technical field
The utility model relates to mechanical, particularly a kind of assistant experiment structure of on universal testing machine, measuring the beam pure bending.
Background technology
At mechanical field; The production of various Machine Design researchs and engineering goods; In order to guarantee and to verify that engineering goods can satisfy the requirement of usability; And choose rational design parameter, and obtain most economical physical dimension, need carry out the material test research of various physical construction patterns; Wherein shown in accompanying drawing 1 to accompanying drawing 5, be respectively the moment curve that produces under mechanical component pure bending power synoptic diagram, the stressed synoptic diagram of original testing machine three-point bending, the effect of original testing machine F power, shear diagram and the original Material Testing Machine structural representation that the effect of original testing machine F power produces down.Accompanying drawing 1 is illustrated in the semi-girder force-bearing situation that receives under the concentrated couple m effect; Accompanying drawing 2 is original testing machine three-point bending force-bearing situation; Accompanying drawing 3 is moment curve and the shear diagram that under the effect of original testing machine F power, produces with 4 in accompanying drawing; Accompanying drawing 5 is original Material Testing Machine structural representation; Its original testing machine mainly is made up of with beam 5, testing machine fixed cross beam 6, crooked pressure head 7 and member supporting 8 base 1, ball-screw 2, moving beam 3, three-point bending support 4, experiment; Under the effect of crooked pressure head 7, the experimental result that is obtained had both produced moment of flexure and had also produced shearing force simultaneously with beam 5 in test.Can find out that on the beam xsect, general action has two kinds of internal force, i.e. shearing Q and moment M in theory when carrying out beam deflection behind comprehensive above-mentioned each accompanying drawing of accompanying drawing.According to the fundamental relation between internal force and the stress, the moment M on the xsect requires on this face normal stress σ to be arranged, because have only σ could form M, in like manner the shearing Q on the xsect then requires on this face shearing τ to be arranged.If the Q=0 on the xsect, and the M=constant claims that this situation is pure bending.Can find out that by accompanying drawing 2 to accompanying drawing 5 test findings that the test method of original Material Testing Machine is carried out not only has moment of flexure but also also has shearing, that is on the xsect of beam existing shearing Q, moment M is arranged again.Yet; Want on original Material Testing Machine, to do the pure bending experiment of beam; And original Material Testing Machine can only be in the experiment of the three-point bending under member supporting 8 supporting powers and the crooked ram pressures effect, and experimental result is not pure bending, can't realize testing the test with the beam pure bending.
The utility model content
The purpose of the utility model is to provide a kind of assistant experiment structure of on universal testing machine, measuring the beam pure bending, thereby has solved on original Material Testing Machine, can not do the pure bending experiment of fine strain of millet, does not reach the problem of the effect of beam pure bending.
The utility model is to realize increasing by an auxiliary experiment structure on original Material Testing Machine architecture basics, includes base, ball-screw, moving beam, three-point bending support, experiment with beam, pressure testing machine fixed cross beam, crooked pressure head, member supporting and crooked pressing plate.The single acting force of crooked pressure head that the utility model has changed original Material Testing Machine contacts with beam with experiment and carries out the situation of mechanical property of materials experiment; Through increasing by an auxiliary pure bending pressing plate; And the both ends of pure bending pressing plate have two place's contact sites of a convex contact site and another convex contact site; Two place's contact sites act on the test specimen respectively; Constituted and the experiment of test specimen two pressure positions, increased by a pressure position, changed crooked pressure head that original Material Testing Machine adopts and tested the single test force-bearing situation that contacts with beam than original testing machine with beam; Can obtain pure bending test parameters, and test parameters is more accurate to test specimen; The shape of the auxiliary pure bending pressing plate that increases is confirmed with the requirement of experiment of beam to satisfy the test specimen experiment.
The utility model concrete structure comprises:
The pure bending pressing plate that increase by is assisted between original experiment is with fine strain of millet and crooked pressure head;
One end of auxiliary crooked pressing plate has one and acts on the convex contact site of experiment with beam, and another convex contact site of the other end;
Auxiliary pure bending pressing plate be shorter in length than the length of experiment with beam, its pure bending pressing plate shape of cross section of assisting is a rectangle or trapezoidal.
The advantage of the utility model is: solved the problem that on original Material Testing Machine, can not do beam pure bending experiment.
Description of drawings:
Fig. 1 receives synoptic diagram for the mechanical component pure bending.
Fig. 2 is the stressed synoptic diagram of original testing machine three-point bending.
Fig. 3 is the moment curve that produces under the effect of original testing machine F power.
Fig. 4 is the shear diagram that produces under the effect of original testing machine F power.
Fig. 5 is original Material Testing Machine structural representation.
The stressed synoptic diagram of Fig. 6 the utility model four-point bending.
Fig. 7 the utility model test unit moment curve.
Fig. 8 is a utility model test unit shear diagram.
Fig. 9 is the utility model test unit structural representation.
Sequence number implication in the accompanying drawing: base 1, ball-screw 2, moving beam 3, three-point bending support 4, experiment are with beam 5, testing machine fixed cross beam 6, crooked pressure head 7, member supporting 8, pure bending pressing plate 20, convex contact site 21, another convex contact site 22.
Embodiment
Shown in accompanying drawing 6 to accompanying drawing 8, be respectively the stressed synoptic diagram of the utility model four-point bending, the utility model test unit moment curve and utility model test unit shear diagram.By finding out among the figure; Have one by an end of auxiliary pure bending pressing plate 20 and act on the convex contact site 21 of test with a portion of beam 5; And another convex contact site 22 of other end b portion, constituted by four the stressed situations of 8 pairs of experiments of member supporting with beam 5 supporting, auxiliary 20 two acting forces of pure bending pressing plate, on the testing machine after the improvement, carry out experimental result as accompanying drawing 7 with shown in the accompanying drawing 8; A-b section acquisition testing with beam 5 is the simple bending square, and does not have shearing.
Shown in accompanying drawing 9; The utility model is on original Material Testing Machine architecture basics, to increase by an auxiliary experiment structure to realize, includes base 1, ball-screw 2, moving beam 3, three-point bending support 4, experiment with beam 5, pressure testing machine fixed cross beam 6, crooked pressure head 7, member supporting 8 and pure bending pressing plate 20.Wherein base 1, ball-screw 2 and testing machine fixed cross beam 6 have constituted the general frame structure of this Material Testing Machine; Moving beam 3 is a nut thread gear train with ball-screw 2; The top of moving beam 3 is equipped with three-point bending support 4; And the top of three-point bending support 4 is placed with member supporting 8, and under the supporting of member supporting 8, experiment is positioned over the top of three-point bending support 4 with beam 5.During test, moving beam 3 rises or descends under the driving of ball-screw 2, to adjust to the suitable space size of experiment with beam 5 is installed; Drive moving beam 3 together with experiment moving up through the material test mechanism of ocean with beam 5; When experiment with beam 5 with after crooked pressure head 7 contacts; According to testing requirements; Test with the certain pressure of beam 5, promptly can draw and write down out the relevant test figure of this experiment through the meter reading of Material Testing Machine with beam.
The utility model has changed original Material Testing Machine and has contacted with beam 5 with experiment with crooked pressure head 7 only acting forces and carry out the situation that the mechanical property of materials is tested; And installed the pure bending pressing plate 20 of assisting between with beam 5 and crooked pressure head 7 additional in experiment; One end of the pure bending pressing plate 20 that it is auxiliary has one and acts on the convex contact site 21 of test with beam 5; And the other end has another convex contact site 22, promptly has two acting forces to act on test with on the beam 5.The shape of auxiliary pure bending pressing plate 20 is confirmed with the requirement of experiment of beam 5 to satisfy the test specimen experiment: uses beam 5 and the crooked pressing plate 20 of assisting during as the flat contact surface structure when experiment, its stressed of the two is that face contacts as use; When experiment when using beam as circle or ellipsoidal structure, its two contact position contacts for point.Because the no matter way of contact of which kind of acting force; All changed the Test condition of 7 pairs of tests of the crooked pressure head of original Material Testing Machine with beam 5 single acting forces; Greatly change the force-bearing situation of experiment, can obtain the pure bending experiment parameter of test specimen, and make the experiment parameter of test specimen more accurate with beam 5.
Claims (2)
1. assistant experiment structure of on universal testing machine, measuring the beam pure bending; Be on the Material Testing Machine that constitutes with beam (5), pressure testing machine fixed cross beam (6), crooked pressure head (7), member supporting (8) by pressure testing machine base (1), pressure testing machine ball-screw (2), pressure testing machine moving beam (3), pressure testing machine three-point bending support (4), experiment, to improve to form; It is characterized in that: the pure bending pressing plate (20) that increase by is assisted between original experiment is with beam (5) and crooked pressure head (7); One end of the pure bending pressing plate (20) that it is auxiliary has one and acts on the convex contact site (21) of test with beam (5), and the other end has another convex contact site (22).
2. according to the described assistant experiment structure of on universal testing machine, measuring the beam pure bending of claim 1, it is characterized in that: the shape of cross section of auxiliary pure bending pressing plate (20) is a rectangle or trapezoidal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202462990U CN202119669U (en) | 2011-07-13 | 2011-07-13 | Auxiliary experimental structure for measuring pure bending of beams on universal material testing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202462990U CN202119669U (en) | 2011-07-13 | 2011-07-13 | Auxiliary experimental structure for measuring pure bending of beams on universal material testing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202119669U true CN202119669U (en) | 2012-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202462990U Expired - Fee Related CN202119669U (en) | 2011-07-13 | 2011-07-13 | Auxiliary experimental structure for measuring pure bending of beams on universal material testing machine |
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| CN (1) | CN202119669U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104897482A (en) * | 2015-06-16 | 2015-09-09 | 中国人民解放军63983部队 | Device for testing pure bending performance of beam |
| CN105842046A (en) * | 2016-04-11 | 2016-08-10 | 华北水利水电大学 | A hollow-slab-bridge hinge joint bearing capacity test piece, a manufacturing method thereof and a test method of the test piece |
| CN106908330A (en) * | 2017-03-10 | 2017-06-30 | 浙江华电器材检测研究所 | Compound cross-arm single-direction and dual-direction combination bend test device |
| CN113866014A (en) * | 2021-09-28 | 2021-12-31 | 南京林业大学 | Automatic roll-changing bending tester |
-
2011
- 2011-07-13 CN CN2011202462990U patent/CN202119669U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104897482A (en) * | 2015-06-16 | 2015-09-09 | 中国人民解放军63983部队 | Device for testing pure bending performance of beam |
| CN105842046A (en) * | 2016-04-11 | 2016-08-10 | 华北水利水电大学 | A hollow-slab-bridge hinge joint bearing capacity test piece, a manufacturing method thereof and a test method of the test piece |
| CN105842046B (en) * | 2016-04-11 | 2019-02-15 | 华北水利水电大学 | A kind of hollow slab bridge hinge seam test of bearing capacity test specimen and production method and test method |
| CN106908330A (en) * | 2017-03-10 | 2017-06-30 | 浙江华电器材检测研究所 | Compound cross-arm single-direction and dual-direction combination bend test device |
| CN106908330B (en) * | 2017-03-10 | 2024-03-26 | 浙江华电器材检测研究院有限公司 | Single-direction and double-direction combined bending test device for composite cross arm |
| CN113866014A (en) * | 2021-09-28 | 2021-12-31 | 南京林业大学 | Automatic roll-changing bending tester |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120118 Termination date: 20130713 |