CN116678762A - Wide temperature range cupping test device for metal plate - Google Patents
Wide temperature range cupping test device for metal plate Download PDFInfo
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- CN116678762A CN116678762A CN202310447794.5A CN202310447794A CN116678762A CN 116678762 A CN116678762 A CN 116678762A CN 202310447794 A CN202310447794 A CN 202310447794A CN 116678762 A CN116678762 A CN 116678762A
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- 238000012360 testing method Methods 0.000 title claims abstract description 47
- 239000002184 metal Substances 0.000 title claims abstract description 32
- 239000000523 sample Substances 0.000 claims abstract description 116
- 238000009413 insulation Methods 0.000 claims abstract description 35
- 238000004321 preservation Methods 0.000 claims abstract description 21
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 64
- 239000007788 liquid Substances 0.000 claims description 32
- 229910052757 nitrogen Inorganic materials 0.000 claims description 32
- 238000006073 displacement reaction Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 abstract description 18
- 238000000034 method Methods 0.000 abstract description 8
- 238000012544 monitoring process Methods 0.000 abstract description 8
- 238000004080 punching Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 7
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000007704 transition Effects 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
- G01N3/28—Investigating ductility, e.g. suitability of sheet metal for deep-drawing or spinning
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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
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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
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
- G01N3/307—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight generated by a compressed or tensile-stressed spring; generated by pneumatic or hydraulic means
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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
- G01N2203/0001—Type of application of the stress
- G01N2203/001—Impulsive
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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
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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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
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0062—Crack or flaws
- G01N2203/0066—Propagation of crack
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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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
- G01N2203/0226—High temperature; Heating means
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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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0278—Thin specimens
- G01N2203/0282—Two dimensional, e.g. tapes, webs, sheets, strips, disks or membranes
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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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A wide temperature range metal plate cupping test device relates to a cupping test device. The cup burst test device aims at solving the problem that the existing cup burst test device cannot conduct wide-temperature-range cup burst test. The invention relates to a metal plate wide temperature range cupping test device which consists of a shell, a heat preservation cover, a multifunctional probe bracket, a sample fixing pressing plate, a sample fixing base, a multifunctional punch, a heat insulation block, a connecting block and a hydraulic cylinder; according to the invention, by arranging the multifunctional punch capable of realizing low temperature, the sample fixing device capable of realizing high temperature and the vacuum insulation panel arranged in the device, the device can perform a cupping test in a wide temperature range, quantitatively control a temperature field, and monitor the actual temperature, deformation and crack expansion at each monitoring point of a material in the cupping process in real time according to the relation between the temperature and the material punching capacity, so that the forming performance of the material in a complex environment is obtained.
Description
Technical Field
The invention relates to a cupping test device.
Background
A test method for testing sheet metal formability is commonly used in metal cupping tests, which is based on the principle that a clamped specimen is pressed into a die by a punch having a spherical end until a penetration crack occurs. At this time, the dimple depth measured according to the punch displacement is the experimental result. With the continuous development of material technology, a large number of new materials are applied to the fields of aerospace, deep space exploration and the like, and higher requirements are put on the service performance of the materials under special complex working conditions.
It is well known that temperature is an important factor affecting the formability of the metal cup test. Generally, the high temperature accelerates the phenomena of atomic diffusion, dislocation climbing and the like, thereby improving the performance of the metal material. Recent studies have found that some alloys have very low ductile-brittle transition temperatures and excellent strength and plasticity even at minus 258 ℃. This greatly widens the temperature range of material formation and puts new demands on equipment for studying material properties.
The existing cup test device can only perform cup deformation at high temperature and room temperature or at low temperature and room temperature, and can not perform wide-temperature-range cup tests on metal plates at high temperature, room temperature and low temperature by using one cup test machine. Accordingly, there is a need in the art for a test apparatus that can perform cupping tests over a wide temperature range to obtain the formability of materials in complex environments.
Disclosure of Invention
The invention provides a wide-temperature-range metal plate cupping test device, which aims to solve the problem that the traditional cupping test device cannot perform wide-temperature-range cupping test.
The invention relates to a metal plate wide-temperature-range cupping test device which is composed of a shell 1, a heat-preserving cover 2, a multifunctional probe bracket 3, a sample fixing pressing plate 4, a sample fixing base 5, a multifunctional punch 6, a heat-insulating block 7, a connecting block 8 and a hydraulic cylinder 9;
the shell 1 is arranged on the base 24, the opening of the heat preservation cover 2 faces to the upper surface of the top plate arranged on the shell 1, the center of the top of the heat preservation cover 2 is provided with an air vent 15, and a transverse hanging rod 16 is arranged below the air vent 15; the center of the top plate of the shell 1 is provided with a punch through hole, the center of the top plate of the shell 1 is provided with a sample fixing pressing plate 4 which is arranged on the upper surface of a sample fixing base 5, the sample fixing pressing plate 4 and the sample fixing base 5 are respectively provided with through holes which are equal in size and concentric with the punch through hole, a metal sample plate 25 is tightly pressed on the sample fixing base 5 through the sample fixing pressing plate 4, and the metal sample plate 25 covers the through holes of the sample fixing base 5; the upper surface of the sample fixing base 5 is provided with an annular groove surrounding the through hole, and a resistance wire 11 is arranged in the groove; the upper surface of the sample fixing pressing plate 4 is provided with a temperature sensor probe 13; the multifunctional punch 6, the heat insulation block 7, the connecting block 8 and the hydraulic cylinder 9 are arranged in the shell 1, the multifunctional punch 6, the heat insulation block 7, the connecting block 8 and the hydraulic cylinder 9 are sequentially connected from top to bottom, and the multifunctional punch 6 is arranged in a punch through hole in the center of a top plate of the shell 1; the multifunctional probe bracket 3 is a cylinder, the lower end surface of the multifunctional probe bracket 3 is provided with two probe mounting grooves 23, the camera and the displacement sensor probe are respectively arranged in the probe mounting grooves 23, and the multifunctional probe bracket 3 is hung on the hanging rod 16 through the hanging hook 18; the upper end of the multifunctional punch 6 is a spherical surface, a transverse liquid nitrogen input pipeline 19 is arranged at the lower part of the multifunctional punch 6, a plurality of vertical liquid nitrogen branch pipelines 20 are arranged at the upper part of the multifunctional punch 6, the liquid nitrogen branch pipelines 20 are communicated with the liquid nitrogen input pipeline 19, and the communicated liquid nitrogen branch pipelines 20 are communicated with the outside through liquid nitrogen exhaust holes 21.
The principle and beneficial effects of the invention are as follows:
according to the invention, by arranging the multifunctional punch capable of realizing low temperature, the sample fixing device capable of realizing high temperature and the vacuum insulation panel arranged in the device, the device can perform a cupping test in a wide temperature range, quantitatively control a temperature field, and monitor the actual temperature, deformation and crack expansion at each monitoring point of a material in the cupping process in real time according to the relation between the temperature and the material punching capacity, so that the forming performance of the material in a complex environment is obtained.
Drawings
FIG. 1 is a schematic structural diagram of a wide temperature range cupping test equipment for sheet metal in example 1;
fig. 2 is a schematic structural view of the heat-insulating cover 2;
fig. 3 is a cross-sectional view of the multifunctional punch 6;
fig. 4 is a schematic diagram showing the connection of the multifunctional punch 6, the heat insulating block 7, the connection block 8 and the hydraulic cylinder 9.
FIG. 5 is a physical diagram of a sample after the normal temperature no physical field cupping test in example 1;
FIG. 6 is a physical diagram of a sample after the cupping test under the high temperature condition in example 1;
FIG. 7 is a physical diagram of a sample after the cupping test under the low temperature condition in example 1.
Detailed Description
The technical scheme of the invention is not limited to the specific embodiments listed below, and also comprises any reasonable combination of the specific embodiments.
The first embodiment is as follows: the wide temperature range cupping test device for the metal plate in the embodiment consists of a shell 1, a heat preservation cover 2, a multifunctional probe bracket 3, a sample fixing pressing plate 4, a sample fixing base 5, a multifunctional punch 6, a heat insulation block 7, a connecting block 8 and a hydraulic cylinder 9;
the shell 1 is arranged on the base 24, the opening of the heat preservation cover 2 faces to the upper surface of the top plate arranged on the shell 1, the center of the top of the heat preservation cover 2 is provided with an air vent 15, and a transverse hanging rod 16 is arranged below the air vent 15; the ventilation holes 15 facilitate passage of wires and balance of internal and external air pressure. The center of the top plate of the shell 1 is provided with a punch through hole, the center of the top plate of the shell 1 is provided with a sample fixing pressing plate 4 which is arranged on the upper surface of a sample fixing base 5, the sample fixing pressing plate 4 and the sample fixing base 5 are respectively provided with through holes which are equal in size and concentric with the punch through hole, a metal sample plate 25 is tightly pressed on the sample fixing base 5 through the sample fixing pressing plate 4, and the metal sample plate 25 covers the through holes of the sample fixing base 5; the upper surface of the sample fixing base 5 is provided with an annular groove surrounding the through hole, and a resistance wire 11 is arranged in the groove; the upper surface of the sample fixing pressing plate 4 is provided with a temperature sensor probe 13; the temperature sensor probe 13 is used for monitoring the temperature of the plate during the cupping process; the resistance wire 11 is used for realizing a cupping test at a high temperature;
the multifunctional punch 6, the heat insulation block 7, the connecting block 8 and the hydraulic cylinder 9 are arranged in the shell 1, the multifunctional punch 6, the heat insulation block 7, the connecting block 8 and the hydraulic cylinder 9 are sequentially connected from top to bottom, and the multifunctional punch 6 is arranged in a punch through hole in the center of a top plate of the shell 1; the heat insulation block 7 can insulate the temperature of the multifunctional punch head (8) from being conducted downwards.
The multifunctional probe bracket 3 is a cylinder, the lower end surface of the multifunctional probe bracket 3 is provided with two probe mounting grooves 23, the camera and the displacement sensor probe are respectively arranged in the probe mounting grooves 23, and the multifunctional probe bracket 3 is hung on the hanging rod 16 through the hanging hook 18; the displacement sensor probe is used for detecting the displacement of each part of the plate in the cup abrupt shape; the camera is used for monitoring crack growth of the plate in the process of cupping.
The upper end of the multifunctional punch 6 is a spherical surface, a transverse liquid nitrogen input pipeline 19 is arranged at the lower part of the multifunctional punch 6, a plurality of vertical liquid nitrogen branch pipelines 20 are arranged at the upper part of the multifunctional punch 6, the liquid nitrogen branch pipelines 20 are communicated with the liquid nitrogen input pipeline 19, and the communicated liquid nitrogen branch pipelines 20 are communicated with the outside through liquid nitrogen exhaust holes 21. Liquid nitrogen enters the multifunctional punch 6 from the liquid nitrogen input pipeline 19, and is dispersed to each liquid nitrogen branch pipeline 20 to cool the multifunctional punch 6, and finally is discharged to the outside through the liquid nitrogen exhaust hole 21.
The present embodiment has the following advantageous effects:
according to the invention, by arranging the multifunctional punch capable of realizing low temperature, the sample fixing device capable of realizing high temperature and the vacuum insulation panel arranged in the device, the device can perform a cupping test in a wide temperature range, quantitatively control a temperature field, and monitor the actual temperature, deformation and crack expansion at each monitoring point of a material in the cupping process in real time according to the relation between the temperature and the material punching capacity, so that the forming performance of the material in a complex environment is obtained.
The second embodiment is as follows: the first difference between this embodiment and the specific embodiment is that: a limit rubber ring 12 is arranged between the multifunctional punch 6 and a top plate center punch through hole of the shell 1, so that the stamping direction of the multifunctional punch 6 can be kept vertically upwards.
And a third specific embodiment: this embodiment differs from the first or second embodiment in that: the resistance wire 11 is connected with a power supply through a wire.
The specific embodiment IV is as follows: this embodiment differs from one of the first to third embodiments in that: the two ends of the hanging rod 16 are fixedly connected with the inner wall of the heat preservation cover 2 respectively.
Fifth embodiment: this embodiment differs from one to four embodiments in that: the upper end of the multifunctional probe bracket 3 is fixedly connected with a connecting rod 17, and the upper end of the connecting rod 17 is fixedly connected with the lower end of a hook 18.
Specific embodiment six: this embodiment differs from one of the first to fifth embodiments in that: an annular protrusion 22 is arranged on the opening end face of the heat preservation cover 2, an annular groove matched with the protrusion 22 is arranged on the edge of the upper side face of the top plate of the shell 1, and the protrusion 22 is arranged in the annular groove.
Seventh embodiment: this embodiment differs from one of the first to sixth embodiments in that: the sample fixing pressing plate 4 and the sample fixing base 5 are connected through bolts 14.
Eighth embodiment: this embodiment differs from one of the first to seventh embodiments in that: the upper surface of the sample fixing base 5 and the lower surface of the sample fixing pressing plate 4 are provided with anti-slip convex patterns.
Detailed description nine: this embodiment differs from one to eight of the embodiments in that: the inner wall of the heat preservation cover 2 and the inner wall of the shell 1 are stuck with vacuum heat insulation plates.
Detailed description ten: this embodiment differs from one of the embodiments one to nine in that: the lower end face of the multifunctional punch 6 is provided with a threaded hole, the upper end face of the heat insulation block 7 is provided with a boss, the circumferential face of the boss is provided with external threads matched with the threaded hole of the lower end face of the multifunctional punch 6, and the boss at the upper end of the heat insulation block 7 is arranged in the threaded hole of the lower end face of the multifunctional punch 6; the lower end face of the heat insulation block 7 is provided with a threaded hole, the upper end face of the connecting block 8 is provided with a boss, the circumferential face of the boss is provided with external threads matched with the threaded hole of the lower end face of the heat insulation block 7, and the boss of the upper end face of the connecting block 8 is arranged in the threaded hole of the lower end face of the heat insulation block 7; the lower end face of the connecting block 8 is provided with a threaded hole, the upper end face of the hydraulic cylinder 9 is provided with a boss, the circumferential surface of the boss is provided with external threads matched with the threaded hole of the lower end face of the connecting block 8, and the boss of the upper end face of the hydraulic cylinder 9 is arranged in the threaded hole of the lower end face of the connecting block 8; the lower terminal surface of pneumatic cylinder 9 is provided with the screw hole, and the central upper surface of base 24 is provided with the boss, is provided with the external screw thread with the screw hole assorted of the lower terminal surface of pneumatic cylinder 9 on the periphery of boss, and the boss of the central upper surface of base 24 sets up the screw hole at the lower terminal surface of pneumatic cylinder 9.
Example 1:
1-4, the wide temperature range cupping test device for the metal plate in the embodiment consists of a shell 1, a heat preservation cover 2, a multifunctional probe bracket 3, a sample fixing pressing plate 4, a sample fixing base 5, a multifunctional punch 6, a heat insulation block 7, a connecting block 8 and a hydraulic cylinder 9; the shell 1 is arranged on the base 24, the opening of the heat preservation cover 2 faces the upper surface of the top plate arranged on the shell 1, an annular protrusion 22 is arranged on the end face of the opening of the heat preservation cover 2, an annular groove matched with the protrusion 22 is arranged at the edge of the upper side surface of the top plate of the shell 1, the protrusion 22 is arranged in the annular groove, and vacuum heat insulation plates are adhered to the inner wall of the heat preservation cover 2 and the inner wall of the shell 1; the center of the top of the heat preservation cover 2 is provided with an air vent 15, a transverse hanging rod 16 is arranged below the air vent 15, and two ends of the hanging rod 16 are fixedly connected with the inner wall of the heat preservation cover 2 respectively; the ventilation holes 15 facilitate passage of wires and balance of internal and external air pressure. The center of the top plate of the shell 1 is provided with a punch through hole, the center of the top plate of the shell 1 is provided with a sample fixing pressing plate 4 which is arranged on the upper surface of a sample fixing base 5, the sample fixing pressing plate 4 and the sample fixing base 5 are respectively provided with through holes which are equal in size and concentric with the punch through hole, a metal sample plate 25 is tightly pressed on the sample fixing base 5 through the sample fixing pressing plate 4, the metal sample plate 25 covers the through holes of the sample fixing base 5, and the sample fixing pressing plate 4 and the sample fixing base 5 are connected through bolts 14; the upper surface of the sample fixing base 5 and the lower surface of the sample fixing pressing plate 4 are provided with anti-skid convex lines; the upper surface of the sample fixing base 5 is provided with an annular groove surrounding the through hole, a resistance wire 11 is arranged in the groove, and the resistance wire 11 is connected with a power supply through a wire; the upper surface of the sample fixing pressing plate 4 is provided with a temperature sensor probe 13; the temperature sensor probe 13 is used for monitoring the temperature of the plate during the cupping process; the resistance wire 11 is used for realizing a cupping test at a high temperature; the multifunctional punch 6, the heat insulation block 7, the connecting block 8 and the hydraulic cylinder 9 are arranged in the shell 1, the multifunctional punch 6, the heat insulation block 7, the connecting block 8 and the hydraulic cylinder 9 are sequentially connected from top to bottom, and the multifunctional punch 6 is arranged in a punch through hole in the center of a top plate of the shell 1; the heat insulation block 7 can insulate the temperature of the multifunctional punch head (8) from being conducted downwards. A limit rubber ring 12 is arranged between the multifunctional punch 6 and a top plate center punch through hole of the shell 1; the punching direction of the multifunction punch 6 can be kept vertically upward. The multifunctional probe bracket 3 is a cylinder, two probe mounting grooves 23 are formed in the lower end face of the multifunctional probe bracket 3, a camera and a displacement sensor probe are respectively arranged in the probe mounting grooves 23, the multifunctional probe bracket 3 is hung on the hanging rod 16 through the hanging hook 18, a connecting rod 17 is fixedly connected to the upper end of the multifunctional probe bracket 3, and the upper end of the connecting rod 17 is fixedly connected with the lower end of the hanging hook 18; the displacement sensor probe is used for detecting the displacement of each part of the plate in the cup abrupt shape; the camera is used for monitoring crack growth of the plate in the process of cupping. The upper end of the multifunctional punch 6 is a spherical surface, a transverse liquid nitrogen input pipeline 19 is arranged at the lower part of the multifunctional punch 6, a plurality of vertical liquid nitrogen branch pipelines 20 are arranged at the upper part of the multifunctional punch 6, the liquid nitrogen branch pipelines 20 are communicated with the liquid nitrogen input pipeline 19, and the communicated liquid nitrogen branch pipelines 20 are communicated with the outside through liquid nitrogen exhaust holes 21; liquid nitrogen enters the multifunctional punch 6 from the liquid nitrogen input pipeline 19, and is dispersed to each liquid nitrogen branch pipeline 20 to cool the multifunctional punch 6, and finally is discharged to the outside through the liquid nitrogen exhaust hole 21. The lower end face of the multifunctional punch 6 is provided with a threaded hole, the upper end face of the heat insulation block 7 is provided with a boss, the circumferential face of the boss is provided with external threads matched with the threaded hole of the lower end face of the multifunctional punch 6, and the boss at the upper end of the heat insulation block 7 is arranged in the threaded hole of the lower end face of the multifunctional punch 6; the lower end face of the heat insulation block 7 is provided with a threaded hole, the upper end face of the connecting block 8 is provided with a boss, the circumferential face of the boss is provided with external threads matched with the threaded hole of the lower end face of the heat insulation block 7, and the boss of the upper end face of the connecting block 8 is arranged in the threaded hole of the lower end face of the heat insulation block 7; the lower end face of the connecting block 8 is provided with a threaded hole, the upper end face of the hydraulic cylinder 9 is provided with a boss, the circumferential surface of the boss is provided with external threads matched with the threaded hole of the lower end face of the connecting block 8, and the boss of the upper end face of the hydraulic cylinder 9 is arranged in the threaded hole of the lower end face of the connecting block 8; the lower end face of the hydraulic cylinder 9 is provided with a threaded hole, the upper surface of the center of the base 24 is provided with a boss, the circumferential surface of the boss is provided with external threads matched with the threaded hole of the lower end face of the hydraulic cylinder 9, and the boss of the upper surface of the center of the base 24 is arranged in the threaded hole of the lower end face of the hydraulic cylinder 9;
in this embodiment, the temperature sensor probe 13, the camera and the displacement sensor probe are respectively connected with the single-chip microcomputer through wires, the acquired analog signals are converted into digital signals through the single-chip microcomputer, communication with the computer is realized through a bluetooth module of the single-chip microcomputer, and the digital signals are transmitted to the computer.
According to the embodiment, the cupping test can be performed in a wide temperature range, the temperature field can be quantitatively controlled, the relation between the temperature and the material punching capacity can be obtained, and the actual temperature, the deformation and the expansion of cracks at each monitoring point of the material in the cupping process are monitored in real time, so that the forming performance of the material in a complex environment is obtained.
FIG. 5 is a physical diagram of a sample after the normal temperature no physical field cupping test in example 1; FIG. 6 is a physical diagram of a sample after the cupping test under the high temperature condition (600 ℃) in example 1; FIG. 7 is a graphical representation of samples from the cupping test at low temperature (-180 ℃) in example 1. As can be seen from fig. 5 to 7, when the temperature is raised or lowered, the height of the cupping bulge of the alloy plate, namely the cupping value, is obviously raised compared with the normal temperature, which is related to the properties of the alloy plate, and meanwhile, the temperature can also be reflected to have obvious influence on the cupping performance of the plate.
Claims (10)
1. A wide temperature range cup test device of sheet metal, its characterized in that: the metal plate wide-temperature-range cupping test device consists of a shell (1), a heat preservation cover (2), a multifunctional probe bracket (3), a sample fixing pressing plate (4), a sample fixing base (5), a multifunctional punch (6), a heat insulation block (7), a connecting block (8) and a hydraulic cylinder (9);
the shell (1) is arranged on the base (24), the opening of the heat preservation cover (2) faces to the upper surface of a top plate arranged on the shell (1), an air vent (15) is arranged in the center of the top of the heat preservation cover (2), and a transverse hanging rod (16) is arranged below the air vent (15); the center of the top plate of the shell (1) is provided with a punch through hole, the center of the top plate of the shell (1) is provided with a sample fixing pressing plate (4) on the upper surface of a sample fixing base (5), the sample fixing pressing plate (4) and the sample fixing base (5) are respectively provided with through holes which are equal in size and concentric with the punch through hole, a metal sample plate (25) is tightly pressed on the sample fixing base (5) through the sample fixing pressing plate (4), and the metal sample plate (25) covers the through holes of the sample fixing base (5); the upper surface of the sample fixing base (5) is provided with an annular groove surrounding the through hole, and a resistance wire (11) is arranged in the groove; the upper surface of the sample fixing pressing plate (4) is provided with a temperature sensor probe (13); the multifunctional punch (6), the heat insulation block (7), the connecting block (8) and the hydraulic cylinder (9) are arranged in the shell (1), the multifunctional punch (6), the heat insulation block (7), the connecting block (8) and the hydraulic cylinder (9) are sequentially connected from top to bottom, and the multifunctional punch (6) is arranged in a punch through hole in the center of a top plate of the shell (1); the multifunctional probe support (3) is a cylinder, two probe mounting grooves (23) are formed in the lower end face of the multifunctional probe support (3), the camera and the displacement sensor probe are respectively arranged in the probe mounting grooves (23), and the multifunctional probe support (3) is hung on the hanging rod (16) through the hanging hook (18); the upper end of multifunctional punch (6) is the sphere, and the lower part of multifunctional punch (6) is provided with horizontal liquid nitrogen input pipeline (19), and the upper portion of multifunctional punch (6) is provided with a plurality of vertical liquid nitrogen branch pipelines (20), liquid nitrogen branch pipeline (20) and liquid nitrogen input pipeline (19) UNICOM, lead to liquid nitrogen branch pipeline (20) and outside intercommunication through liquid nitrogen exhaust hole (21).
2. The wide temperature range cupping test device of sheet metal according to claim 1, wherein: a limiting rubber ring (12) is arranged between the multifunctional punch (6) and a top plate center punch through hole of the shell (1).
3. The wide temperature range cupping test device of sheet metal according to claim 1, wherein: the resistance wire (11) is connected with a power supply through a wire.
4. The wide temperature range cupping test device of sheet metal according to claim 1, wherein: two ends of the hanging rod (16) are fixedly connected with the inner wall of the heat preservation cover (2) respectively.
5. The wide temperature range cupping test device of sheet metal according to claim 1, wherein: the upper end of the multifunctional probe bracket (3) is fixedly connected with a connecting rod (17), and the upper end of the connecting rod (17) is fixedly connected with the lower end of a hook (18).
6. The wide temperature range cupping test device of sheet metal according to claim 1, wherein: an annular bulge (22) is arranged on the opening end face of the heat preservation cover (2), an annular groove matched with the bulge (22) is formed in the edge of the upper side face of the top plate of the shell (1), and the bulge (22) is arranged in the annular groove.
7. The wide temperature range cupping test device of sheet metal according to claim 1, wherein: the sample fixing pressing plate (4) is connected with the sample fixing base (5) through bolts (14).
8. The wide temperature range cupping test device of sheet metal according to claim 1, wherein: the upper surface of the sample fixing base (5) and the lower surface of the sample fixing pressing plate (4) are provided with anti-skid convex lines.
9. The wide temperature range cupping test device of sheet metal according to claim 1, wherein: the inner wall of the heat preservation cover (2) and the inner wall of the shell (1) are stuck with vacuum heat insulation plates.
10. The wide temperature range cupping test device of sheet metal according to claim 1, wherein: the lower end face of the multifunctional punch (6) is provided with a threaded hole, the upper end face of the heat insulation block (7) is provided with a boss, the circumferential face of the boss is provided with external threads matched with the threaded hole of the lower end face of the multifunctional punch (6), and the boss at the upper end of the heat insulation block (7) is arranged in the threaded hole of the lower end face of the multifunctional punch (6); the lower end face of the heat insulation block (7) is provided with a threaded hole, the upper end face of the connecting block (8) is provided with a boss, the circumferential surface of the boss is provided with external threads matched with the threaded hole of the lower end face of the heat insulation block (7), and the boss of the upper end face of the connecting block (8) is arranged in the threaded hole of the lower end face of the heat insulation block (7); the lower end face of the connecting block (8) is provided with a threaded hole, the upper end face of the hydraulic cylinder (9) is provided with a boss, the circumferential surface of the boss is provided with external threads matched with the threaded hole of the lower end face of the connecting block (8), and the boss of the upper end face of the hydraulic cylinder (9) is arranged in the threaded hole of the lower end face of the connecting block (8); the lower terminal surface of pneumatic cylinder (9) is provided with the screw hole, and the center upper surface of base (24) is provided with the boss, is provided with the external screw thread with the screw hole assorted of the lower terminal surface of pneumatic cylinder (9) on the periphery of boss, and the boss of the center upper surface of base (24) sets up the screw hole at the lower terminal surface of pneumatic cylinder (9).
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