CN112213189A - Composite tension-shear test device - Google Patents
Composite tension-shear test device Download PDFInfo
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- CN112213189A CN112213189A CN202011042806.9A CN202011042806A CN112213189A CN 112213189 A CN112213189 A CN 112213189A CN 202011042806 A CN202011042806 A CN 202011042806A CN 112213189 A CN112213189 A CN 112213189A
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
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Abstract
The invention relates to a composite pull-shear test device, which comprises: the two fastening loading units are used for being matched with each other to carry out a pull-shear composite test on the columnar fastener sample; each fastening loading unit comprises a transfer loading piece, a fastening clamping block and two connecting plates which are arranged at intervals in the front-back direction, sample through holes are formed in the fastening clamping block and used for fastening and penetrating a columnar fastener sample, the fastening clamping block is fastened and assembled with the two connecting plates, and the transfer loading piece is connected with the two connecting plates so that the loading force application direction of the transfer loading piece points to the centroid of the columnar fastener sample; in each fastening loading unit, the fastening clamping block is detachably fastened and assembled with the two corresponding connecting plates. In each fastening loading unit, the fastening clamp blocks and the two corresponding connecting plates can be detachably fastened and assembled, so that different fastening clamp blocks can be selected by bolts with different specifications and types, only the clamp blocks need to be replaced, the whole fastening loading unit does not need to be replaced, and the cost can be effectively reduced.
Description
Technical Field
The invention belongs to the field of clamps for testing the strength characteristic of a material by mechanical stress, and particularly relates to a composite tension-shear test device.
Background
With the rapid development of the aerospace field, the requirement on the connection performance of the fastener between the substrates in the aerospace field is higher and higher, the test method and the tool are continuously updated and improved, particularly, the influence of the tool on the test result is more and more emphasized by people, and at present, the main failure modes of the fastener products such as bolts and the like which can be simulated in a laboratory comprise overload failure modes, hydrogen embrittlement modes, stress corrosion cracking modes, fatigue fracture modes, high-temperature failure modes and the like. However, many key parts of the fasteners bear the combined tensile and shear load in the actual working state, not only the single tensile or shear load, so that the bolt tensile test device disclosed in the similar chinese patent application with application publication No. CN106840871A can not be used when performing failure test on the fasteners, and the test device can only perform tensile test on the fasteners and needs to perform the tensile and shear combined test on the fasteners synchronously.
The invention discloses a multi-angle adjustable test device in Chinese invention patent application with application publication number 108169016A, wherein a test can simultaneously bear tensile force and shearing force, the test device comprises a pair of fastening loading devices, each fastening loading device comprises a connecting fastening part and a loading clamp plate, the connecting fastening part comprises a fastening plate and two connecting plates, a sample hole is arranged in the middle of the fastening plate, the loading clamp plate is movably connected with a movable plate, the connecting fastening part comprises a connecting plate and a fastening plate, so that the loading clamp plate points to a sample centroid, for example: set up the bolt hole of arranging along the arc on the connecting plate or set up the bolt spout that extends along the arc, bolt hole or bolt spout on every connecting plate are double-deck setting, through changing loading splint and connecting plate hookup location, can change the angle that changes relative experiment. During the use, loading splint and connecting plate bolted connection to, set up the spread groove on two connecting plates, mounting plate and spread groove welded connection utilize the sample with two mounting plate fastening connection, through loading splint, connecting plate and mounting plate to experimental pressure testing effort, in order to test, because the difference of optional difference changes experimental angle, can develop the mechanical properties research of samples such as screw and rivet under different pulling forces and shear force combination condition.
The direct and connecting plate fixed connection of mounting plate is feasible in theory among the above-mentioned patent document, has a great deal of problem in the in-service use: in addition, during testing, due to the fact that the specifications of samples to be tested are large, a plurality of sets of connecting and fastening components of different types need to be arranged, testing cost is relatively high, once testing accuracy is reduced due to abrasion of a sample hole in the center of a fastening plate, the whole connecting and fastening component needs to be replaced, and cost is relatively high.
Disclosure of Invention
The invention aims to provide a composite pull-shear test device to solve the technical problem that in the prior art, different connecting and fastening parts need to be selected according to bolts with different specifications and types due to welding connection of a connecting plate and a fastening plate.
In order to achieve the purpose, the technical scheme of the composite pull-shear test device provided by the invention is as follows: a composite pull-shear test apparatus comprising:
the two fastening loading units are arranged along the vertical direction which is consistent with the axial direction of the columnar fastener sample to be tested and are used for being matched with each other to carry out a pull-shear composite test on the columnar fastener sample;
each fastening loading unit comprises a transfer loading piece, a fastening clamping block and two connecting plates which are arranged at intervals in the front-back direction, sample through holes are formed in the fastening clamping block and used for fastening and penetrating a columnar fastener sample, the fastening clamping block is fastened and assembled with the two connecting plates, and the transfer loading piece is connected with the two connecting plates so that the loading force application direction of the transfer loading piece points to the centroid of the columnar fastener sample; in each fastening loading unit, the fastening clamping block is detachably fastened and assembled with the two corresponding connecting plates.
The beneficial effects are that: in the composite pull-shear test device provided by the invention, the fastening clamp blocks and the two corresponding connecting plates can be detachably fastened and assembled in each fastening loading unit, so that different fastening clamp blocks can be selected by bolts with different specifications and types, only the clamp blocks need to be replaced, the whole fastening loading unit does not need to be replaced, and the cost can be effectively reduced.
As a further improvement, in each fastening loading unit, the fastening clamping block is detachably fastened and assembled with the corresponding two connecting plates through fastening bolts.
The beneficial effects are that: the fastening clamping block and the two corresponding connecting plates can be detachably fastened and assembled through the fastening bolt, the structure is simple, and the realization is convenient.
In each fastening loading unit, the fastening clamp block is provided with inner side bolt assembling holes, the two connecting plates are provided with outer side bolt assembling holes, the inner side bolt assembling holes and the outer side bolt assembling holes are correspondingly communicated and used for penetrating and installing the fastening bolts, and at least two inner side bolt assembling holes are symmetrically distributed on the left and right directions relative to the sample perforation on the fastening clamp block.
The beneficial effects are that: the fastening bolts are penetrated through the inner bolt assembling holes and the outer bolt assembling holes, so that the assembly process is convenient, the assembly process requirement is not high, and the assembly cost can be effectively reduced under the condition of ensuring the assembly precision.
In each fastening loading unit, an inner positioning pin through hole is formed in the fastening clamping block, outer positioning through holes are formed in the two connecting plates, the inner positioning pin through hole and the outer positioning pin through hole are correspondingly communicated so as to penetrate the positioning pin, positioning assembly of the fastening clamping block and the two connecting plates is guaranteed, and two inner positioning pin through holes are symmetrically distributed in the left and right direction relative to the sample through hole in the fastening clamping block.
The beneficial effects are that: the positioning pins are arranged on the fastening clamping block and the connecting plate for punching, so that the positioning pins can be conveniently penetrated and installed, accurate positioning can be realized, and the assembling precision can be further improved.
As a further improvement, in each fastening loading unit, four inner bolt assembly holes are symmetrically distributed on the fastening clamp block about a test through hole, and on the fastening clamp block, two inner assembly bolt holes on each side and one inner positioning pin through hole on the same side are distributed in a triangular mode.
The beneficial effects are that: two inner side assembly bolt holes and inner side positioning pins which are distributed in a triangular mode are punched, so that the assembly is convenient, and the local stress can be optimized.
As a further improvement, in each fastening loading unit, the switching loading piece is movably connected with the two connecting plates through a hinge pin shaft.
The beneficial effects are that: the switching loading piece is hinged and movably connected with the connecting plate, so that the assembly is convenient, and the force application direction of the switching loading piece is ensured to point to the centroid of the sample when the force is applied from top to bottom.
As a further improvement, in each fastening loading unit, a plurality of hinge holes distributed along an arc are respectively arranged on the two connecting plates.
The beneficial effects are that: set up a plurality of hinge holes on the connecting plate, conveniently carry out the experimental research of shearing of drawing of different angles.
In each fastening loading unit, the opposite inner side surfaces of two connecting plates which are arranged at intervals in the front-back direction are respectively provided with a clamping block mounting area, the opposite inner side surfaces of the two connecting plates are provided with stopping edges on the inner sides of the clamping block mounting areas, the stopping edges are arranged in a protruding mode relative to the clamping block mounting areas, the clamping block mounting areas are planar mounting areas, and at least one side edge of each clamping block mounting area extends to the edge of the corresponding connecting plate.
The beneficial effects are that: the clamping block positioning grooves with the outer sides open are formed on the opposite inner side surfaces of the two connecting plates, so that the clamping blocks can be conveniently installed from one side of the edge, and the installation is convenient.
As a further improvement: the composite pull-shear test device further comprises two bushings, the two bushings are used for being detachably and fixedly installed in the sample through holes of the two fastening clamping blocks of the two fastening loading units in a one-to-one correspondence mode, and the bushings are used for penetrating and installing the columnar fastener samples.
The beneficial effects are that: two bushings are configured, the corresponding specification types can be further refined by replacing the bushings, and the application range is expanded.
As a further improvement: the sample through holes of the fastening clamping blocks are of stepped hole structures, the bushings are respectively provided with outward turning edges, the outward turning edges are in blocking fit with stepped surfaces of the stepped hole structures, positioning assembly of the bushings and the corresponding fastening clamping blocks is achieved, and then the columnar fastener sample penetrates through the two bushings to enable the two bushings to be fastened and installed on the two fastening clamping blocks.
The beneficial effects are that: the outward turning edge arranged on the bushing is utilized to facilitate the positioning and assembly with the sample perforation of the fastening clamping block.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of a composite pull-shear test apparatus provided in the present invention;
FIG. 2 is a front view of the test apparatus shown in FIG. 1 (only showing the clamping blocks, the single-sided connecting plate, and the adapter rod);
FIG. 3 is a schematic view of the construction of the upper connecting plate of FIG. 2;
FIG. 4 is a schematic view of the upper clamping jaw of FIG. 2;
FIG. 5 is a schematic view of the upper bushing of FIG. 2;
fig. 6 is a schematic structural view of the upper transfer loading rod in fig. 2.
Description of reference numerals:
in fig. 1: 1-upper fastening loading unit, 11-upper fastening loading rod, 12-upper connecting plate, 13-upper fastening clamping block, 2-lower fastening loading unit, 21-lower fastening loading rod, 22-lower connecting plate, 3-hinge pin shaft, 4-fastening bolt, 5-positioning pin and 6-cylindrical fastener sample.
In fig. 2: 11-upper connecting and loading rod, 12-upper connecting plate, 13-upper fastening clamp block, 14-upper bushing, 21-lower connecting and loading rod, 22-lower connecting plate, 23-lower fastening clamp block, 24-lower bushing and 7-hinge hole.
In fig. 3: 12-upper connecting plate, 120-stopping edge, 121-clamping block mounting area, 7-hinge hole, 8-outer side bolt mounting hole and 9-outer side positioning pin through hole.
In fig. 4: 10-sample perforation, 13-lower fastening clamp block, 81-inner side bolt mounting hole and 91-inner side positioning pin perforation.
In fig. 5: 14-upper bushing, 140-upturned rim, 141-bushing inner bore.
In fig. 6: 11-upper pivot loading rod, 110-hinge shaft through hole.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, elements recited by the phrase "comprising an … …" do not exclude the inclusion of such elements in processes or methods.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or a non-detachable connection. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
The present invention will be described in further detail with reference to examples.
The specific embodiment 1 of the composite tension-shear test device provided by the invention:
as shown in fig. 1 to 6, the composite pull-shear test apparatus integrally includes two fastening loading units, i.e., an upper fastening loading unit 1 and a lower fastening loading unit 2, which are arranged along an up-down direction consistent with an axial direction of a cylindrical fastener sample to be tested, and are used in cooperation to perform a pull-shear composite test on the cylindrical fastener sample.
As shown in fig. 1 and 2, the two fastening and loading units have the same structure, the upper fastening and loading unit 1 includes an upper connecting and loading rod 11, an upper fastening clamp 13 and two upper connecting plates 12, the lower fastening and loading unit 2 includes a lower connecting and loading rod 21, a lower fastening clamp 23 and two lower connecting plates 22, in each fastening and loading unit, each fastening clamp is detachably fastened and assembled with the corresponding two connecting plates to form an assembly unit, and then the corresponding connecting and loading rod is movably connected with the corresponding two connecting plates in a hinged assembly manner.
As shown in fig. 3 and 4, in each fastening loading unit, the fastening clamp block is detachably fastened and assembled with the corresponding two connecting plates by the fastening bolt 4. Specifically, the fastening assembly of the connecting plate 12 and the upper fastening block 13 is described in detail as an example: go up fastening clamp splice 13 and be the rectangular form that extends along left right direction on the whole, the centre is provided with sample perforation 10, it has two inboard locating pin perforation 91 to go up to fasten clamp splice 13 along left right direction about sample perforation 10 symmetric distribution for wear to adorn locating pin 5, it has four inboard bolt pilot holes to go up to fasten clamp splice 13 along left right direction about sample perforation 10 symmetric distribution, two inboard bolt mounting holes 81 of every side are along upper and lower direction interval distribution, and be triangular distribution with an inboard locating pin perforation 91 that is in same one side.
For the upper fastening loading unit 1, the two upper connecting plates 12 are distributed in parallel at intervals along the front-rear direction, the opposite inner side surfaces of each upper connecting plate 12 are respectively provided with a clamping block mounting area, the clamping block mounting area is a plane mounting area, the clamping block mounting area is a rectangular structure, the edges of the two sides of the clamping block mounting area extend to the edges of the corresponding connecting plate, two stopping edges 120 are arranged on the inner side surfaces of the corresponding connecting plates on the inner sides of the clamping block mounting areas, the two stopping edges 120 are vertically arranged to form an angular positioning structure, and the stopping edges 120 are arranged in a protruding manner relative to the clamping block mounting areas so as to conveniently form stopping positioning with the fastening clamping blocks and realize pre-positioning assembly. It should be noted that the clamping block mounting area corresponds to the new installation of the fastening clamping block, and if the vertical cross section of the fastening clamping block is circular, the clamping block mounting area is also circular, and at this time, the stopping edge can be designed as an arc-shaped stopping edge as long as it can form effective stopping and positioning with the fastening clamping block.
The upper connecting plate 12 is correspondingly provided with outer positioning pin 5 through holes and outer bolt assembling holes, the number and the arrangement positions of the outer positioning pin 5 through holes correspond to the number and the arrangement positions of the inner positioning pin through holes 91, so that the outer positioning pin 5 through holes and the inner positioning pin through holes 91 are correspondingly communicated, the number and the arrangement positions of the outer bolt assembly holes correspond to the number and the arrangement positions of the inner bolt assembly holes, so that the positions of the outer side bolt assembly holes and the inner side bolt assembly holes are correspondingly communicated, as shown in figure 1, the positioning pins 5 are correspondingly inserted into the outer side positioning pin 5 through holes and the outer side positioning pin 5 through holes, the accurate positioning of the upper fastening clamping block 13 and the two upper connecting plates 12 is realized, and then the fastening bolts 4 are correspondingly inserted into the outer side bolt assembly holes and the inner side bolt assembly holes, so that the fastening assembly of the upper fastening clamp block 13 and the two upper connecting plates 12 is realized.
In order to facilitate the assembly of each switching loading rod, a hinge hole 7 is arranged on the corresponding connecting plate so as to be hinged and assembled with the corresponding switching loading rod through a hinge shaft. The above-mentioned transfer loading rod 11 and the upper connecting plate 12 are described as an example: as shown in fig. 6, the upper transferring and loading rod 11 has a rod body and a rod head, the rod body is clamped by the loading device for applying force, and the rod head is provided with a hinge through hole for communicating with the hinge hole 7 at the corresponding position on the upper connecting plate 12 to pass through a hinge shaft, so as to realize the hinge movable assembly of the upper transferring and loading rod 11 and the upper connecting plate 12.
As shown in fig. 2, an upper bushing 14 is installed in the sample through hole 10 of the upper fastening clamp block 13, and a lower bushing 24 is installed in the sample through hole 10 of the lower fastening clamp block 23, and the bushings have the same structure, and the bushing 14 is described as an example: as shown in fig. 5, the upper bushing 14 has a bushing inner hole 141, the bushing inner hole 141 is used for receiving the cylindrical fastener sample 6, and an outwardly turned edge 140 is provided at the upper end of the upper bushing 14, correspondingly, as shown in fig. 2, the sample through hole 10 of the upper connecting plate 12 has a stepped hole structure, when the upper bushing 14 is installed in the sample through hole 10 of the upper connecting plate 12, the upper bushing 14 is positioned and assembled with the upper fastening clamp 13, and then the cylindrical fastener sample passes through the upper bushing and the lower bushing to fasten the two bushings on the two fastening clamp.
For the pull shear test that can carry out different angles, be equipped with respectively on each connecting plate along a plurality of hinge hole 7 that the arc distributes, as shown in fig. 3, be equipped with on the upper junction plate 12 along 7 hinge holes 7 of circular arc interval equipartition in proper order, interval central angle is 15, can be through selecting different hinge hole 7 and the articulated assembly of hinge pin axle like this, make switching loading arm and cylindricality fastener sample 6 form different contained angles to carry out the different test research of cutting of pulling to cylindricality fastener sample 6.
It should be noted that no matter which hinge hole 7 is connected, the loading force application direction of the adapter loading rod is directed to the centroid of the cylindrical fastener sample 6, so as to ensure the measurement accuracy.
When the device is used, the upper fastening clamp 13, the upper connecting plate 12 and the upper transferring and loading rod 11 are fixedly assembled to form an upper fastening and loading unit 1, the lower fastening clamp 23, the lower connecting plate 22 and the lower transferring and loading rod 21 are fixedly assembled to form a lower fastening and loading unit 2, the upper transferring and loading rod 11 and the lower transferring and loading rod 21 are connected to a testing tension host, two bushings are correspondingly placed in sample through holes 10 of the two fastening clamp blocks, then cylindrical fastener samples 6 such as bolts are mounted in a penetrating mode, nuts are screwed, the two bushings are fastened and assembled together, the testing tension host applies tension to the two transferring and loading rods, and the two transferring and loading rods apply tension and shear to the cylindrical fastener samples 6 through the corresponding connecting plates, the fastening clamp blocks and the bushings to complete the pull-shear composite test.
During the test, can select the hinge hole of different positions to form the application of force of different directions to cylindrical fastener sample, thereby different pull shear test.
The coaxial force application test of the two switching loading rods is conveniently ensured by utilizing the coaxial performance of the clamping structure of the test tension host, and the test precision can be effectively ensured. The main machine for testing tension belongs to the prior art, and is not described in detail herein.
In the composite tension-shear test device provided by the embodiment, due to the fact that the fastening clamping blocks are detachably connected with the corresponding connecting plates, the appropriate fastening clamping blocks can be selected according to the actual to-be-tested specification, and when the fastening clamping blocks are replaced, only two fastening clamping blocks need to be replaced, the whole fastening loading unit does not need to be replaced, and cost can be effectively reduced. Moreover, the sample specification range covered by each fastening clamp block can be further blocked by selecting the bushing.
The specific embodiment 2 of the composite tension-shear test device provided by the invention:
the difference from example 1 is mainly that: in embodiment 1, in each fastening loading unit, the switching loading rod is movably assembled with the corresponding two connecting plates through a hinge pin. In this embodiment, the adapter loading rod can be tightly assembled with the two corresponding connecting plates as long as the loading force application direction applied by the adapter loading rod is directed to the centroid of the columnar fastener sample.
The specific embodiment 3 of the composite tension-shear test device provided by the invention:
the difference from example 1 is mainly that: in example 1, in each fastening loading unit, the fastening clamp block and the two connecting plates are detachably fastened and assembled through fastening bolts. In this embodiment, the fastening clamp block can also be fixed on the connecting plates by press-fitting through the pressing plate, specifically, positioning slots are respectively provided on the two connecting plates, the corresponding ends of the fastening clamp block are matched with the positioning slots for insertion, and fastening bolts are penetratingly provided on the two connecting plates to apply opposite fastening acting forces to the two connecting plates, so that the two connecting plates and the fastening clamp block can be detachably fixed and assembled together.
The specific embodiment 4 of the composite tension-shear test device provided by the invention:
the difference from example 1 is mainly that: in embodiment 1, the fastening clamp block is provided with not only bolt fitting holes but also positioning pin through holes. In the present embodiment, the positioning pin penetration hole is omitted, and only the bolt fitting hole is provided on the fastening clamp block.
The specific embodiment 5 of the composite tension-shear test device provided by the invention:
the difference from example 1 is mainly that: in example 1, four inner bolt fitting holes are symmetrically arranged in each fastening block with respect to the sample through hole. In this embodiment, two or six inner bolt assembly holes are symmetrically distributed on the fastening clamp block about the sample through hole, as long as the fastening assembly of the connecting plate and the fastening clamp block can be ensured.
The specific embodiment 6 of the composite tension-shear test device provided by the invention:
the difference from example 1 is mainly that: in example 1, the sample through-holes of the fastening clamp blocks are respectively sleeved, so that different sleeves can be selected to be matched with samples with different specifications. In this embodiment, the bush is omitted, and the cylindrical fastener sample is directly inserted into the test through hole of the fastening clamp block, as long as the fastening clamp blocks can be fixedly assembled.
The specific embodiment 7 of the composite tension-shear test apparatus provided by the present invention:
the difference from example 1 is mainly that: in example 1, the adapter loading rod as an adapter loading member applies a pulling and shearing force to the cylindrical fastener sample through the connecting plate and the fastening clamp block. In this embodiment, a switching loading plate is used as a switching loading piece to apply a pulling and shearing action force to the cylindrical fastener sample through the connecting plate and the fastening clamping block, and a hinge hole is formed in the switching loading plate and used for penetrating and installing a hinge pin shaft so as to be movably assembled with the two corresponding connecting plates in a hinge mode.
Finally, although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments without departing from the inventive concept, or some of the technical features may be replaced with equivalents. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A composite pull-shear test apparatus comprising:
the two fastening loading units (1, 2) are arranged along the vertical direction which is consistent with the axial direction of the columnar fastener sample to be tested and are used for being matched with each other to carry out a pull-shear composite test on the columnar fastener sample;
each fastening loading unit comprises a transfer loading piece, a fastening clamping block and two connecting plates which are arranged at intervals in the front-back direction, a sample perforation (10) is arranged on the fastening clamping block and used for fastening and penetrating a columnar fastener sample (6), the fastening clamping block is fastened and assembled with the two connecting plates, and the transfer loading piece is connected with the two connecting plates so that the loading force application direction of the transfer loading piece points to the centroid of the columnar fastener sample;
the device is characterized in that in each fastening loading unit, the fastening clamping block and the two corresponding connecting plates are detachably fastened and assembled.
2. The combined pull-shear test device of claim 1, wherein in each fastening loading unit, the fastening clamp blocks are detachably fastened and assembled with the corresponding two connecting plates through fastening bolts (4).
3. The combined tension and shear test device according to claim 2, wherein in each fastening loading unit, the fastening clamp block is provided with inner bolt assembly holes (81), the two connecting plates are provided with outer bolt assembly holes (8), the inner bolt assembly holes and the outer bolt assembly holes are correspondingly communicated for the fastening bolts (4) to be inserted, and at least two inner bolt assembly holes (81) are symmetrically distributed in the left-right direction relative to the sample through holes (10) on the fastening clamp block.
4. The combined pull-shear test device according to claim 3, wherein in each fastening loading unit, the fastening clamp block is provided with inner positioning pin through holes (91), the two connecting plates are provided with outer positioning through holes (9), the inner positioning pin through holes and the outer positioning pin through holes are correspondingly communicated so as to be penetrated with positioning pins (5) to ensure the positioning assembly of the fastening clamp block and the two connecting plates, and the inner positioning pin through holes (91) are symmetrically distributed in two relative to the sample through holes (10) on the fastening clamp block in the left-right direction.
5. The combined pull-shear test device according to claim 4, wherein in each fastening loading unit, four inner bolt assembly holes (8) are symmetrically distributed about the test through hole on the fastening clamp block, and two inner assembly bolt holes (8) on each side are distributed in a triangular manner with one inner positioning pin through hole (91) on the same side on the fastening clamp block.
6. A composite pull-shear test device according to any one of claims 1 to 5, wherein in each fastening loading unit, the switching loading piece is movably connected with the two connecting plates through a hinge pin (3).
7. A composite pull-shear test device according to claim 6, wherein in each fastening and loading unit, the two connecting plates are respectively provided with a plurality of hinge holes (7) distributed along an arc.
8. The combined pull-shear test device according to any one of claims 1 to 5, wherein in each fastening and loading unit, clamp block mounting areas (121) are respectively arranged on opposite inner side surfaces of two connecting plates arranged at intervals in the front-back direction, stop edges (120) are arranged on the opposite inner side surfaces of the two connecting plates and on the inner sides of the clamp block mounting areas, the stop edges (120) are arranged in a protruding manner relative to the clamp block mounting areas (121), and the clamp block mounting areas (121) are planar mounting areas, at least one side edge of which extends to the edge of the corresponding connecting plate.
9. The combined pull-shear test device according to any one of claims 1 to 5, further comprising two bushings for one-to-one detachable fastening in the sample through holes (10) of the two fastening blocks of the two fastening loading units, the bushings being used for threading the cylindrical fastener samples.
10. The combined pull-shear test device of claim 9, wherein the sample through hole of each fastening clamp block is of a stepped hole structure, each bushing is provided with an outward turned edge (140), and the outward turned edges (140) are in stop fit with the stepped surface of the stepped hole structure to realize the positioning and assembly of each bushing and the corresponding fastening clamp block, so that the two bushings are fastened and mounted on the two fastening clamp blocks by the sample of the columnar fastener penetrating through the two bushings.
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| CN202011042806.9A CN112213189A (en) | 2020-09-28 | 2020-09-28 | Composite tension-shear test device |
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