CN204008338U - Pendulum shearing resistance impact testing machine - Google Patents

Pendulum shearing resistance impact testing machine Download PDF

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Publication number
CN204008338U
CN204008338U CN201420344594.3U CN201420344594U CN204008338U CN 204008338 U CN204008338 U CN 204008338U CN 201420344594 U CN201420344594 U CN 201420344594U CN 204008338 U CN204008338 U CN 204008338U
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CN
China
Prior art keywords
fork
pendulum
working shaft
link
shearing resistance
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Expired - Fee Related
Application number
CN201420344594.3U
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Chinese (zh)
Inventor
芮勇勤
张宏
肖让
王成
王荣
杨保存
李献灿
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Northeastern University China
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Northeastern University China
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Priority to CN201420344594.3U priority Critical patent/CN204008338U/en
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Expired - Fee Related legal-status Critical Current
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Abstract

A kind of pendulum shearing resistance impact testing machine, belongs to concrete material technical field of measurement and test, relates to a kind of pendulum shearing resistance impact testing machine.Use shearing resistance Impulse Test Result of the present utility model accurate, applied widely, be easy to carry, and can avoid operating personnel to cause danger.The utility model comprises working shaft, base, bearing, link, pendulum, fork, index dial and pointer; On base, be fixed with link and bearing, be fixed with working shaft on link, be provided with fork on working shaft, fork is connected with pendulum; On pendulum, be fixed with pendulum cutter, on link, be fixed with index dial, on working shaft, be provided with pointer, between fork and pointer, be provided with impeller; On link, be provided with locking mechanism, fork is locked on link by locking mechanism.

Description

Pendulum shearing resistance impact testing machine
Technical field
The utility model belongs to concrete material technical field of measurement and test, relates to a kind of pendulum shearing resistance impact testing machine.
Background technology
Fiber concrete is compared with normal concrete, and its tension, flexural tensile strength (claiming again bending resistance, rupture strength), shearing strength obviously improve, and toughness also has clear improvement.In recent years, deepen continuously both at home and abroad for the research of fiber concrete, the application of fiber concrete is also more and more extensive.Building beam column plate, bridge, road surface, prefabricated pile build the works such as end and bear shearing resistance percussive action more, and have considerable part to belong to curved scissors impact, and the shearing resistance impact property of therefore studying fiber concrete is of great practical significance.
For fiber concrete shearing resistance impact property research experiment, the test unit that Chinese scholars adopts is generally the drop-weight test device that 544 councils of ACI (ACI) are recommended, or be the improved device that drops hammer on drop-weight test device basic, be mainly used in studying the impulse test of fiber concrete compressive property.And in building, bridge structure, many beam-type members must bear the impact load that causes curved scissors stress, it is to evaluate the important indicator of concrete material performance that impact property is cut in bending resistance.But owing to still lacking at present the resistance standard test device of test shearing resistance impact property, designer still cannot be using shearing resistance impact property as a design parameter.Although the Chinese patent that application number is 102680334A " magnetic switch control drop hammer type anti-bend impact testing table " came out in 2012, realize the anti-bend impact test of repeatedly dropping hammer, due to repetitive operation, waste time and energy, affect to a certain extent measuring accuracy.Existing beater type bending resistance is cut impact test apparatus and is come with some shortcomings: the hammer that liquidates is taked manual positioning, and shock height and ram hammer drop point easily produce error, also have the situation of energy loss; Do not adopt pendulum load transfer device, easily cause stress to concentrate, cannot guarantee the accuracy of test findings.
Utility model content
The problem existing for prior art, the utility model provides a kind of pendulum shearing resistance impact testing machine, make shearing resistance Impulse Test Result accurate, applied widely, be easy to carry, and can avoid operating personnel to cause danger, simple to operate, be particularly useful for the shearing resistance shock table of domestic different building ground, thereby solved the problems such as ram hammer manual positioning easily produces error and easily causes that stress is concentrated.
To achieve these goals, the utility model adopts following technical scheme: a kind of pendulum shearing resistance impact testing machine, comprise working shaft, base, bearing, link, pendulum, fork, index dial and pointer, on base, be fixed with link and bearing, on link, be fixed with working shaft, on working shaft, be provided with fork, fork is connected with pendulum; On pendulum, be fixed with pendulum cutter, on link, be fixed with index dial, on working shaft, be provided with pointer, between fork and pointer, be provided with impeller; On link, be provided with locking mechanism, fork is locked on link by locking mechanism.
Described fork and working shaft vertical setting mutually, pointer and working shaft vertical setting mutually.
The center of circle of described index dial and the axle center of working shaft coincide.
The inner of described fork is annular, is sleeved on working shaft.
The inner of described pointer is annular, is sleeved on working shaft, between fork and index dial.
Described impeller is pin, and pin is fixed on fork, and passes the rotational plane of pointer.
Described locking mechanism is made up of self-locking arm and peg, and the oblique top of self-locking arm is fixed on link, is provided with through hole in the outer end of self-locking arm, and one end of peg is arranged in through hole, and the other end holds up fork.
Described index dial is zero near one end of raising in advance position of fork, and one end that index dial is raised position in advance away from fork is maximum scale value.
The beneficial effects of the utility model:
The utility model has solved various transient state mechanics index of physics and the parameter of test specimen in impulse test, and the evolutionary process of destruction unstability, improve results precision and efficiency, both can be used for experimental study in testing laboratory and also can be used for scene and carry out the test evaluation of shearing resistance impact property.
Brief description of the drawings
Fig. 1 is the structural representation of pendulum shearing resistance impact testing machine of the present utility model;
Fig. 2 is that Fig. 1 removes the vertical view after fork, pendulum, pendulum cutter, index dial and pointer;
In figure, 1--working shaft, 2--base, 3--link, 4--fork, 5--pendulum, 6--bearing, 7--pendulum cutter, 8--index dial, 9--pointer, 10--impeller, 11--locking mechanism, 12--self-locking arm, 13--peg.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
As shown in Figure 1 and Figure 2, a kind of pendulum shearing resistance impact testing machine, comprise working shaft 1, base 2, bearing 6, link 3, pendulum 5, fork 4, index dial 8 and pointer 9, be fixed with link 3 and bearing 6 at the top of base 2, bearing 6 is fixed on the front of link 3, is fixed with working shaft 1 on the top of link 3, is provided with the inner of fork 4 on working shaft 1, fork 4 can rotate taking working shaft 1 as the center of circle, and the outer end of fork 4 is connected with pendulum 5, on pendulum 5, be fixed with pendulum cutter 7, on the link 3 at the rear of working shaft 1, be fixed with index dial 8, on working shaft 1, be provided with pointer 9, pointer 9 can rotate taking working shaft 1 as the center of circle, between fork 4 and pointer 9, be provided with impeller 10, so that fork 4 declines under Action of Gravity Field, in the process that raises up, push pointer 9 is rotated taking working shaft 1 as the center of circle, and while falling after rise, leave pointer 9 after fork 4 raises up, on described link 3, be provided with locking mechanism 11, fork 4 is locked on link 3 by locking mechanism 11, and fork 4 Wei Yuyang position, position now.
Described link 3 is fixedly connected with by ring flange with working shaft 1.
Described fork 4 and the mutual vertical setting of working shaft 1, pointer 9 and the mutual vertical setting of working shaft 1.
The axle center of the center of circle of described index dial 8 and working shaft 1 coincides.
The inner of described fork 4 is annular, is sleeved on working shaft 1.
The inner of described pointer 9 is annular, is sleeved on working shaft 1, between fork 4 and index dial 8.
Described impeller 10 is pin, pin is fixed on the inner of fork 4, and the bottom of pin is through the rotational plane of pointer 9, when fork 4 declines, raises up in process under Action of Gravity Field, pin push pointer 9 is rotated taking working shaft 1 as the center of circle, and while falling after rise after fork 4 raises up, pin leaves pointer 9.
Described locking mechanism 11 is made up of self-locking arm 12 and peg 13, oblique right-hand being fixed on link 3 of self-locking arm 12, with the angle of vertical direction be 150 °, outer end at self-locking arm 12 is provided with through hole, one end of peg 13 is arranged in through hole, the other end holds up fork 4, now the Wei Yuyang position, position of fork 4.
The right-hand member scale of described index dial 9 is zero, and left end scale is maximum scale value; Make fork 4 under Action of Gravity Field, decline, raise up by extracting the peg 13 of fork 4 belows out, and fork 4 is while raising up to peak, push pointer 9 goes to maximum scale value by zero on index dial 8.
On the working shaft 1 of described fork 4 both sides, be provided with round nut, so that restriction fork 4 axially moves.
On the working shaft 1 of described pointer 9 both sides, be provided with round nut, so that limit pointer 9 axially moves.
The test method that adopts described pendulum shearing resistance impact testing machine, specifically comprises the steps:
Step 1: record test specimen compressive strength;
Method A: the third-class office (the third-class office at test specimen top and bottom, the positive back side) of determining the length of test specimen, adopt nonmetal ultrasonic instrument to carry out respectively transmission to trisection place, detect quality, and adopt reisilometer to carry out attached survey to trisection point, detect the modulus of resilience, obtain the compressive strength of test specimen by the quality that records and the modulus of resilience;
Method B: adopt anti-folding, resistance to compression servo testing machine directly to record the intensity of test specimen;
Step 2: test specimen is lain in a horizontal plane on bearing 6 of the present utility model, make the test specimen back side near bearing 6, test specimen is positive corresponding with the swaying direction of pendulum 5, impacted by 7 shearing resistances of pendulum cutter;
Test specimen material: fiber concrete;
Test specimen parameter: length is 160 ± 0.5mm, width is 40 ± 0.2mm, is highly 40 ± 0.2mm;
Step 3: fork 4 is placed on the peg 13 of locking mechanism 11, now the Wei Yuyang position, position of fork 4;
Step 4: the maximum scale value place (high order end) that pointer 9 is pushed to index dial 8;
Step 5: extract the peg 13 of fork 4 belows out, fork 4 gravitates drive pendulum cutter 7 to rotate whereabouts taking working shaft 1 as the center of circle, makes the front of test specimen be subject to the 7 shearing resistances impacts of pendulum cutter;
Step 6: until the positive of pendulum cutter 7 impact test pieces and raise up to peak, backswing fork 4 is to raising in advance position, and locks by locking mechanism 11;
Step 7: record pointer 9 while raising up extreme higher position after the pendulum cutter 7 impact test pieces scale value on index dial 8, this scale value has represented the shearing resistance ballistic work of test specimen;
Step 8: the third-class office (the third-class office at test specimen top and bottom, the positive back side) of the length by vibration signals collecting testing tool (model is Vib-SYS) to test specimen is tested, obtain shearing resistance force-displacement curve, to obtain the shearing resistance ballistic work of test specimen; And by corresponding with the scale value obtaining in step 7 the shearing resistance ballistic work of the test specimen obtaining;
Step 9: repeating step one~step 8; Obtain the scale value of shearing resistance ballistic work and the index dial 8 corresponding with it of three test specimens, and obtain respectively the mean value of the two;
Step 10: by the 25° position, upper and lower drift angle in the alignment lens test specimen front of high-speed figure image machine, record the digitized video of test specimen in pendulum cutter 7 impact processes, obtain the destruction situation of the test specimen corresponding with shearing resistance force-displacement curve;
Step 11: obtain the impact energy values corresponding with shearing resistance force-displacement curve:
Method A: the central point that the test probe of vibration signals collecting testing tool (model is Vib-SYS) is arranged on to the rear and front end face (size is 40 × 40mm) of test specimen, test probe and test specimen close contact, record the transient impact energy curves of test specimen in pendulum cutter 7 shearing resistance impact processes, obtain the impact energy values corresponding with shearing resistance force-displacement curve;
Method B: the central point that the test probe of micro-earthquake monitoring system (model is PS-10X-DXP) is arranged on to test specimen rear and front end face (size is 40 × 40mm), test probe and test specimen close contact, record test specimen transient impact AE (acoustic emission) some energy curves in pendulum cutter 7 impact processes, obtain the impact energy values corresponding with shearing resistance force-displacement curve;
Step 12: adopt electron stereomicroscope (model is ZYT-900) to test specimen the plane of fracture after pendulum cutter 7 impacts observe, it is very responsive that material for test impact is tested the breakage causing, therefore impulse test is used for evaluating the damaged susceptibility of material for test under one-shot load, obtain difference damaged under the macroscopic view of ballistic work to material for test and electron stereomicroscope, to control and stabilizing material quality.

Claims (8)

1. a pendulum shearing resistance impact testing machine, it is characterized in that comprising working shaft, base, bearing, link, pendulum, fork, index dial and pointer, on base, be fixed with link and bearing, on link, be fixed with working shaft, on working shaft, be provided with fork, fork is connected with pendulum; On pendulum, be fixed with pendulum cutter, on link, be fixed with index dial, on working shaft, be provided with pointer, between fork and pointer, be provided with impeller; On link, be provided with locking mechanism, fork is locked on link by locking mechanism.
2. pendulum shearing resistance impact testing machine according to claim 1, is characterized in that described fork and working shaft vertical setting mutually, pointer and working shaft vertical setting mutually.
3. pendulum shearing resistance impact testing machine according to claim 1, is characterized in that the center of circle of described index dial and the axle center of working shaft coincide.
4. pendulum shearing resistance impact testing machine according to claim 1, is characterized in that the inner of described fork, for annular, is sleeved on working shaft.
5. pendulum shearing resistance impact testing machine according to claim 1, is characterized in that the inner of described pointer, for annular, is sleeved on working shaft, between fork and index dial.
6. pendulum shearing resistance impact testing machine according to claim 1, is characterized in that described impeller is pin, and pin is fixed on fork, and passes the rotational plane of pointer.
7. pendulum shearing resistance impact testing machine according to claim 1, it is characterized in that described locking mechanism is made up of self-locking arm and peg, the oblique top of self-locking arm is fixed on link, is provided with through hole in the outer end of self-locking arm, one end of peg is arranged in through hole, and the other end holds up fork.
8. pendulum shearing resistance impact testing machine according to claim 1, is characterized in that described index dial is zero near one end of raising in advance position of fork, and one end that index dial is raised position in advance away from fork is maximum scale value.
CN201420344594.3U 2014-06-25 2014-06-25 Pendulum shearing resistance impact testing machine Expired - Fee Related CN204008338U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104048885A (en) * 2014-06-25 2014-09-17 东北大学 Pendulum bob type shearing-resistant impact testing machine and testing method thereof
CN106370530A (en) * 2016-10-14 2017-02-01 内蒙古农业大学 Straw crushing property testing device and testing method thereof
CN108627388A (en) * 2018-04-25 2018-10-09 扬州大学 A kind of measurement method of instantaneous impact
CN108627405A (en) * 2018-04-02 2018-10-09 江苏科泰检测技术服务有限公司 Error test detection method for metal material Charpy pendulu ballistic work
CN109060498A (en) * 2018-06-26 2018-12-21 天津澳晨科技有限公司 A kind of pendulum test machine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104048885A (en) * 2014-06-25 2014-09-17 东北大学 Pendulum bob type shearing-resistant impact testing machine and testing method thereof
CN104048885B (en) * 2014-06-25 2017-04-12 东北大学 Pendulum bob type shearing-resistant impact testing machine and testing method thereof
CN106370530A (en) * 2016-10-14 2017-02-01 内蒙古农业大学 Straw crushing property testing device and testing method thereof
CN106370530B (en) * 2016-10-14 2020-04-17 内蒙古农业大学 Straw crushing characteristic test device and method thereof
CN108627405A (en) * 2018-04-02 2018-10-09 江苏科泰检测技术服务有限公司 Error test detection method for metal material Charpy pendulu ballistic work
CN108627388A (en) * 2018-04-25 2018-10-09 扬州大学 A kind of measurement method of instantaneous impact
CN109060498A (en) * 2018-06-26 2018-12-21 天津澳晨科技有限公司 A kind of pendulum test machine

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20141210

Termination date: 20150625

EXPY Termination of patent right or utility model