CN112393974A - Cross fixture device based on survey does not have rivet joint tensile strength - Google Patents
Cross fixture device based on survey does not have rivet joint tensile strength Download PDFInfo
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- CN112393974A CN112393974A CN202011465391.6A CN202011465391A CN112393974A CN 112393974 A CN112393974 A CN 112393974A CN 202011465391 A CN202011465391 A CN 202011465391A CN 112393974 A CN112393974 A CN 112393974A
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- 238000009864 tensile test Methods 0.000 claims abstract description 18
- 238000012360 testing method Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 5
- 238000004458 analytical method Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 241000886569 Cyprogenia stegaria Species 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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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
- G01N3/02—Details
- G01N3/04—Chucks
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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
- G01N3/08—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
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A cross fixture device based on the determination of the tensile strength of a rivetless joint mainly comprises a cross tensile fixture, a tensile testing machine, a control system and the like. The invention adopts a mode of combining the stretching clamp and the cross clamp to realize the axial stretching and strength detection of the rivet-free plastic forming joint. Firstly, performing rivet-free plastic connection on two plates, wherein the lapping mode is cross, and a cross upper clamping block clamps a lower plate for fixation; the cross lower clamp clamps the upper plate, the cross lower clamp and the upper plate move downwards at a set speed in an axial direction, namely cross stretching, until the joint fails, the two plates are separated, and data are acquired through software matched with a tensile testing machine, so that the tensile strength of the rivet-free plastic forming joint is detected. The method solves the problem of strength detection of the rivetless connection sample in a cross lapping mode through the matching of the clamp and the software, and provides a foundation for later analysis and prediction of the tensile strength of the joint.
Description
Technical Field
The invention relates to a cross fixture device based on the determination of the tensile strength of a rivetless joint, in particular to a strength detection device for a rivetless plastic forming joint, and belongs to the fields of metal plastic forming technology and fixture manufacturing.
Background
The rivetless connection process has very wide application in household electrical appliance manufacturing and automobile assembly, such as automobile instrument frames, automobile skylight steel-aluminum frameworks, automobile doors, dentist machine shells, fan shells, refrigerator doors and the like, along with the increasingly wide application of a new generation of high-strength light materials, the rapid development and low cost of modern products and other characteristics, the connection of parts is required to reduce energy consumption, working procedures and working hours as much as possible, reduce the production cost and improve the production efficiency.
The riveting position of the rivetless forming joint under the room temperature condition warp resistance big, the resilience volume is big, the fragility is big etc, it needs to carry out a large amount of tensile failure tests to detect the joint, radial tensile accessible carries out unidirectional stretching to the rivetless quality spare of single shear overlap joint mode, can realize the shear strength detection of joint, and it needs to carry out axial tension to detect tensile strength to the joint, the rivetless quality spare of single shear overlap joint mode has not been realized, many problems have been brought for the scientific research, current cross rivetless quality spare, but have following problem:
firstly, the cross stretching, namely the axial stretching, is carried out in the absence of a clamp;
secondly, a formed convex part is arranged on the rivetless connecting piece, and the design of the clamp needs to be taken into consideration;
thirdly, the existing unidirectional tensile testing machine is designed, so that certain difficulty exists.
In order to solve the problems in the tensile strength detection, the invention provides a cross fixture device based on the determination of the tensile strength of a rivetless joint, which is based on a traditional tensile testing machine, successfully realizes the axial stretching of a cross rivetless connecting piece and detects the tensile strength.
The invention solves the problem that the tensile strength cannot be detected by axially stretching the connecting piece, reduces the cost and realizes the tensile strength detection of the rivet-free formed joint. In summary, it is necessary to design a cross fixture for measuring the tensile strength of a non-riveted joint to realize the tensile strength detection.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the cross fixture device based on the determination of the tensile strength of the rivetless joint is provided for solving the problem of the detection of the tensile strength of the rivetless forming joint.
The invention provides a cross fixture device based on the determination of the tensile strength of a rivetless joint, which realizes the axial tension and strength detection of a rivetless plastic forming joint by adopting a mode of combining a stretching fixture and a cross fixture. Firstly, performing rivet-free plastic connection on two plates, wherein the lapping mode is cross, and a cross upper clamping block clamps a lower plate for fixation; the cross lower clamp clamps the upper plate, the cross lower clamp and the upper plate move downwards at a set speed in an axial direction, namely cross stretching, until the joint fails, the two plates are separated, and data are acquired through software matched with a tensile testing machine, so that the tensile strength of the rivet-free plastic forming joint is detected. Through the cooperation of anchor clamps and software, solved the intensity detection problem of the no riveting connection sample of cross overlap joint mode, provide the basis for the tensile strength and the prediction of later stage analysis joint.
Drawings
FIG. 1: an axonometric view of a criss-cross fixture device based on the determination of the tensile strength of a rivetless joint.
FIG. 2: the structure schematic diagram of the tensile testing machine is provided.
FIG. 3: an axonometric view of the control system of the invention.
FIG. 4: the structure of the cross stretching clamp is schematically shown.
FIG. 5: front and top views of the connector block of the present invention.
FIG. 6: the invention relates to a bottom view and a cross section view of a cross upper clamp block.
FIG. 7: the cross lower clamp block of the present invention has a bottom view and a cross-sectional view.
FIG. 8: the invention discloses a structural schematic diagram of a cross rivetless connecting piece.
Wherein: 1. a cross tensile fixture, 2, a tensile testing machine, 3, a control system, 4, a top plate, 5, a side plate, 6, a fastening rod, 7, a guide device, 8, a power switch, 9, an indicator light, 10, a control box, 11, a lower pull plate, 12, a lower tensile fixture, 13, an upper tensile fixture, 14, a fixing plate, 15, a software system, 16, a host computer, 17, a computer desk, 18, a connecting block, 19, a nut, 20, a hexagon socket head cap screw, 21, a cross upper clamping block, 22, a cross lower clamping block, 23, a gasket, 24, a lower plate, 25, an upper plate, 26, a rivet-free forming joint, 27, a through hole a, 28, a threaded hole a, 29, a through hole b, 30, a threaded hole b, 31, a counter bore, 32, a threaded hole c, 33, a through hole c, 34, a circular counter bore, 35 and a cross rivet-free connecting piece.
Detailed Description
The present embodiment will be described with reference to the drawings and examples.
A cross fixture device based on the determination of the tensile strength of a rivetless joint is mainly composed of a cross tensile fixture (1), a tensile testing machine (2), a control system (3), an upper plate (25) and a lower plate (24) as shown in figure 1, and the connection relationship is as follows: the crossed rivet-free connecting piece (35) is arranged on the crossed stretching clamp (1) to realize the installation before stretching; the cross stretching clamp (1) is arranged on the stretching testing machine (2) through a lower stretching clamp (12) and an upper stretching clamp (13); the tensile testing machine (2) is connected with the control system (3) through an interface on the host (16); the control system (3) is arranged on the left side of the tensile testing machine (2) to realize the control of the tensile direction and speed of the equipment by computer software.
As shown in fig. 2, the tensile testing machine (2) mainly comprises a top plate (4), a side plate (5), a fastening rod (6), a guiding device (7), a power switch (8), an indicator lamp (9), a control box (10), a lower pull plate (11), a lower tensile fixture (12), an upper tensile fixture (13) and a fixing plate (14), and is specifically arranged as follows: the fastening rod (6) is arranged in the lower stretching clamp (12) and the upper stretching clamp (13), and the lower stretching clamp (12) and the upper stretching clamp (13) can be respectively fastened through rotation; the lower stretching clamp (12) is arranged on the lower pulling plate (11); the upper stretching clamp (13) is arranged on the fixing plate (14); the fixed plate (14) and the lower pull plate (11) are arranged on the side plate (5) through a guide device (7), wherein the lower pull plate (11) can move up and down; the power switch (8) and the indicator light (9) are arranged on the control box (10); curb plate (5), roof (4) and control box (10) are installed respectively and are being controlled at the stretcher, upper and lower side, and whole tensile testing machine (2) have realized the unidirectional stretching effect, provide the prerequisite for axial tension.
As shown in fig. 3, the control system (3) mainly comprises a software system (15), a host (16) and a computer desk (17), and is specifically arranged as follows: the software system (15) and the host (16) are installed on the computer desk (17) to realize the speed and direction of cross stretching and acquire data.
As shown in fig. 4-7, the cross tensile fixture (1) mainly comprises a connecting block (18), a nut (19), an inner hexagon bolt (20), a cross upper clamping block (21), a cross lower clamping block (22), a washer (23), a threaded hole a (28), a through hole b (29), a threaded hole b (30), a counter bore (31), a threaded hole c (32), a through hole c (33), a circular counter bore (34) and a cross rivet-free connecting piece (35), and is specifically arranged as follows: the cross rivet-free connecting piece (35) is arranged on the cross stretching clamp (1) through the through hole a (27), the through hole c (33) and the through hole b (29); the cross upper clamping block (21) is arranged on the connecting block (18) through a threaded hole b (30) and a threaded hole a (28) and is screwed and fixed by adopting an inner hexagonal bolt (20) and a nut (19); a counter bore (31) is attached to the cross upper clamping block, the head of the inner hexagonal bolt is mainly and completely sunk into the counter bore, and the middle of the counter bore is used for placing a convex part on a rivetless forming joint (26), so that the lower plate (24) is tightly attached to the cross upper clamping block (21); the cross lower clamping block (22) is arranged on the connecting block (18) through a threaded hole c (32) and a threaded hole a (28) and is also screwed and fixed by adopting an inner hexagonal bolt (20) and a nut (19).
As shown in fig. 8, the cross rivetless connecting member (35) mainly comprises an upper plate (25), a lower plate (24), a through hole a (27) and a rivetless forming joint (26), wherein the upper plate (25) and the lower plate (24) are connected in a cross lap joint manner by rivetless plastic forming; the two sides of the lower plate (24) are provided with through holes a (27), the through holes a (27) and the through holes b (29) are matched through hexagon socket head bolts (20), nuts (19) and washers (23), connection between the lower plate (24) and the cross upper clamp block (21) is achieved, the rivet-free forming joint (26) is located at the cross center and sinks into the counter bore (31) after installation; two sides of the upper plate (25) are provided with through holes c (33), and the through holes a (27) and the through holes c (33) are matched through hexagon socket head bolts (20), nuts (19) and washers (23) to realize the connection of the upper plate (25) and the cross lower clamp block (22).
It will be understood that modifications and variations are possible in the art in light of the above teachings and all such modifications and variations are considered to be within the purview of the appended claims.
The example is a tensile and strength testing process for a criss-cross rivetless connection.
The method comprises the following steps of firstly, carrying out rivet-free connection on an upper plate and a lower plate according to a cross lapping mode, namely, a cross rivet-free connecting piece, opening a tensile testing machine and a computer, and connecting the two.
And secondly, controlling the lower pull plate to move downwards to an idle position by using computer software, installing the cross upper clamp on the upper stretching part, installing the cross lower stretching clamp on the lower stretching part, and clamping the cross upper clamp and the cross lower stretching clamp by rotating the fastening rod.
Thirdly, the lower plate of the cross rivetless connector, namely the end with the protrusion, is in bolted connection with the through hole b through the through hole a, then the lower pull plate drives the cross upper clamp to move upwards until the through hole a of the upper plate is close to the through hole c, and the lower pull plate is fixed by the hexagon socket head cap screw, as shown in fig. 4.
And fourthly, setting the stretching speed through a control system, and controlling the lower pulling plate to start to stretch the rivet-free forming joint axially downwards until the upper plate and the lower plate are separated.
And fifthly, acquiring data such as force, displacement, deformation, time and the like in a software system, and drawing a force-displacement curve.
And sixthly, repeating the steps to detect the tensile strength of the second crossed rivetless connecting piece.
Claims (5)
1. The utility model provides a cross fixture device based on survey does not have riveted joint tensile strength, characterized by, this equipment comprises cross tensile fixture (1), tensile testing machine (2), control system (3), goes up panel (25), lower panel (24), and its relation of connection is as follows: the cross rivet-free connecting piece (35) is arranged on the cross stretching clamp (1); the cross stretching clamp (1) is arranged on the stretching testing machine (2) through a lower stretching clamp (12) and an upper stretching clamp (13); the tensile testing machine (2) is connected with the control system (3) through an interface on the host (16); the control system (3) is arranged on the left side of the tensile testing machine (2) to realize the control of the tensile direction and speed of the equipment by computer software.
2. The cross fixture device based on the determination of the tensile strength of the rivetless joint as claimed in claim 1, wherein the tensile testing machine (2) mainly comprises a top plate (4), a side plate (5), a fastening rod (6), a guiding device (7), a power switch (8), an indicator lamp (9), a control box (10), a lower pull plate (11), a lower pull fixture (12), an upper pull fixture (13) and a fixing plate (14), and the specific arrangement is as follows: the fastening rod (6) is arranged in the lower stretching clamp (12) and the upper stretching clamp (13), and the lower stretching clamp (12) and the upper stretching clamp (13) can be respectively fastened through rotation; the lower stretching clamp (12) is arranged on the lower pulling plate (11); the upper stretching clamp (13) is arranged on the fixing plate (14); the fixed plate (14) and the lower pull plate (11) are arranged on the side plate (5) through a guide device (7), wherein the lower pull plate (11) can move up and down; the power switch (8) and the indicator light (9) are arranged on the control box (10); curb plate (5), roof (4) and control box (10) are installed respectively and are being controlled at the stretcher, upper and lower side, and whole tensile testing machine (2) have realized the unidirectional stretching effect, provide the prerequisite for axial tension.
3. The cross fixture device based on the measurement of the tensile strength of the rivetless joint as claimed in claim 1, wherein the control system (3) mainly comprises a software system (15), a host computer (16) and a computer desk (17), and is specifically arranged as follows: the software system (15) and the host (16) are installed on the computer desk (17) to realize the speed and direction of cross stretching and acquire data.
4. The cross fixture device based on the determination of the tensile strength of the rivetless joint as claimed in claim 1, wherein the cross tensile fixture (1) mainly comprises a connecting block (18), a nut (19), a hexagon socket head cap screw (20), an upper cross clamping block (21), a lower cross clamping block (22), a gasket (23), a threaded hole a (28), a through hole b (29), a threaded hole b (30), a counter bore (31), a threaded hole c (32), a through hole c (33), a circular counter bore (34), and a cross rivetless connecting member (35), and is specifically arranged as follows: the cross rivet-free connecting piece (35) is arranged on the cross stretching clamp (1) through the through hole a (27), the through hole c (33) and the through hole b (29); the cross upper clamping block (21) is arranged on the connecting block (18) through a threaded hole b (30) and a threaded hole a (28) and is screwed and fixed by adopting an inner hexagonal bolt (20) and a nut (19); a counter bore (31) is attached to the cross upper clamping block, the head of the inner hexagonal bolt is mainly and completely sunk into the counter bore, and the middle of the counter bore is used for placing a convex part on a rivetless forming joint (26), so that the lower plate (24) is tightly attached to the cross upper clamping block (21); the cross lower clamping block (22) is arranged on the connecting block (18) through a threaded hole c (32) and a threaded hole a (28) and is also screwed and fixed by adopting an inner hexagonal bolt (20) and a nut (19).
5. The cross fixture device based on the determination of the tensile strength of the rivetless joint as claimed in claim 1, wherein the cross rivetless connecting member (35) mainly comprises an upper plate (25), a lower plate (24), a through hole a (27) and a rivetless forming joint (26), and the upper plate (25) and the lower plate (24) are connected by the rivetless plastic forming in a cross lap joint manner; the two sides of the lower plate (24) are provided with through holes a (27), the through holes a (27) and the through holes b (29) are matched through hexagon socket head bolts (20), nuts (19) and washers (23), connection between the lower plate (24) and the cross upper clamp block (21) is achieved, the rivet-free forming joint (26) is located at the cross center and sinks into the counter bore (31) after installation; two sides of the upper plate (25) are provided with through holes c (33), and the through holes a (27) and the through holes c (33) are matched through hexagon socket head bolts (20), nuts (19) and washers (23) to realize the connection of the upper plate (25) and the cross lower clamp block (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011465391.6A CN112393974A (en) | 2020-12-14 | 2020-12-14 | Cross fixture device based on survey does not have rivet joint tensile strength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011465391.6A CN112393974A (en) | 2020-12-14 | 2020-12-14 | Cross fixture device based on survey does not have rivet joint tensile strength |
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| CN112393974A true CN112393974A (en) | 2021-02-23 |
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| CN202011465391.6A Pending CN112393974A (en) | 2020-12-14 | 2020-12-14 | Cross fixture device based on survey does not have rivet joint tensile strength |
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| KR20120110532A (en) * | 2011-03-29 | 2012-10-10 | 현대제철 주식회사 | Jig apparatus for tensile test of spot welding sample |
| CN205363680U (en) * | 2016-02-01 | 2016-07-06 | 天津大学 | Plug welding of test bridging plate cone of friction connects tensile strength's anchor clamps |
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2020
- 2020-12-14 CN CN202011465391.6A patent/CN112393974A/en active Pending
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