CN109975105A - A kind of plate thickness detected automatically is to resistance of deformation test mould - Google Patents
A kind of plate thickness detected automatically is to resistance of deformation test mould Download PDFInfo
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- CN109975105A CN109975105A CN201910247870.1A CN201910247870A CN109975105A CN 109975105 A CN109975105 A CN 109975105A CN 201910247870 A CN201910247870 A CN 201910247870A CN 109975105 A CN109975105 A CN 109975105A
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- 238000012360 testing method Methods 0.000 title claims abstract description 89
- 238000007906 compression Methods 0.000 claims abstract description 158
- 230000006835 compression Effects 0.000 claims abstract description 142
- 238000006073 displacement reaction Methods 0.000 claims abstract description 34
- 239000007787 solid Substances 0.000 claims abstract description 30
- 238000005259 measurement Methods 0.000 claims abstract description 28
- 238000013461 design Methods 0.000 claims abstract description 11
- 238000009434 installation Methods 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims description 12
- 230000008859 change Effects 0.000 claims description 10
- 230000000694 effects Effects 0.000 claims description 6
- 230000007423 decrease Effects 0.000 claims description 5
- 239000000523 sample Substances 0.000 claims description 5
- 239000000725 suspension Substances 0.000 claims description 4
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- 239000000203 mixture Substances 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 2
- 238000002474 experimental method Methods 0.000 claims description 2
- 230000008602 contraction Effects 0.000 claims 1
- 208000020442 loss of weight Diseases 0.000 abstract description 3
- 238000004364 calculation method Methods 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 238000011160 research Methods 0.000 abstract description 2
- 238000007493 shaping process Methods 0.000 abstract 1
- 238000012546 transfer Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 6
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000011897 real-time detection Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000012669 compression test Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002520 smart material Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 208000016261 weight loss Diseases 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
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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
- G01N2203/0019—Compressive
-
- 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
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
-
- 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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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention provides a kind of plate thickness detected automatically to resistance of deformation test mould and pilot system, including compression cavity plate, compression punch-pin, compression blocks and measuring system, mainly for the research of the resistance to plane deformation in plate shaping field.Displacement sensor is installed on compression cavity plate, and load transducer is placed in compression cavity plate, can be passed through two kinds of sensor real-time monitorings and be acquired displacement and the load information for acting on tests exemplar.Measuring system is made of measuring rod, the solid block of measurement, compressed spring, the accurate transfer to displacement deformation is realized, so that displacement sensor be allowed accurately to acquire data.Compression blocks are completed the loss of weight of compression blocks, are fixed using right angle positioning plate centering installation and right angle slideway using completely new power transmitting calculation method design, improve replacing to moderate and convenient for the compression blocks of different area for compression blocks.Compression mould with automatic detection function reduces the functional requirement tested to testing machine, facilitates test operation.
Description
Technical field
The invention belongs to material properties test technical fields, are related to one kind and build and tie by reasonable detection control apparatus
Structure design, realizes the device of the precision real time measuring in compression process, and specially a kind of plate thickness detected automatically is anti-to deformation
Power test mould, and the automatic checkout system and method that are adapted with the mold.
Background technique
It is swift and violent with the column support types such as machine-building, aerospace, petrochemical industry, precision instrument industry and construction type industry
Development, basic material of the metal material as structure, wherein, play the role of always for a long time it is critical, for material
The analytical equipment method of performance also results in more and more attention.For the microstructure and mechanical property of gain insight into metal,
Establish a series of evaluation test methods.Simultaneously with the development to new industry, also by smart material performance testing equipment
It is included in high-end equipment manufacturing industry, becomes emphasis and supports technical field.
Compression experiment is an important content in material properties test, and compression mould is for measuring metal certain
In the experimental facilities for resisting this deformation force on unit cross-sectional area when being plastically deformed under deformation condition.As shown in Figure 1, original
Compression mould be, using reasonable appearance geometric dimension, to guarantee its specific strained condition by the way that compression blocks are made into long narrow shape.
Lubricant is wiped in compression blocks and surface of test piece when test, to guarantee that the lateral resistance of compression blocks tends to 0.Pass through upper and lower two
The pointed mold movement of same shape, realizes the compression process of test specimen.But above-mentioned mold has the disadvantage that: when static, upper,
Lower compression blocks centering has random effect；When operating, since the bad phenomenon of centering can aggravate, to influence test measurement
Precision.In addition, compression blocks simple shape, overall structure is heavy, is not rationally designed, there are problem of resource waste.It is then old
It is bright to have devised following compression mould, lower part is designed as concavity slideway, prevent measurement test specimen slide laterally, improve test specimen with
Compression blocks to moderate, as shown in Figure 2.But this device is restricted due to track siding, to the size essence of test test specimen
More stringent requirements are proposed for exactness, if machining accuracy is poor, will lead to that test specimen can not be installed or deviation occurs in installation site, from
And influence test accuracy.If change compressing area is tested, mold needs are reinstalled and are debugged, larger workload.This
Outside, by research discovery presently, there are compression mould be required to it is higher by performance, multiple functional, control the higher examination of precision
Machine acquisition system is tested to complete the real-time record of required displacement, load data, to calculate the resistance to plane deformation of metal material.
Therefore, the environment carried out to test is proposed very high requirement by this, to also increase the difficulty of test.
Summary of the invention
In view of the deficienciess of the prior art, the present invention is intended to provide one kind can automatic real-time detection metal blank displacement
With the resistance of deformation test mould and system of load, which is studied mainly for plate, since plate thickness direction is small,
Therefore it mainly takes the mode of compressive deformation to measure metal flat resistance of deformation and is studied.Simultaneously to solve existing pair
In it is bad, replacement is many and diverse, stress is bad, requires pilot system excessively high problem.
The complete technical solution of the present invention includes:
A kind of plate thickness detected automatically is to resistance of deformation test mould, it is characterised in that: convex including compression cavity plate, compression
Mould, displacement sensor, load transducer, wherein the compression cavity plate is located above the test specimen of measurement, the compression punch-pin is located at
Below test specimen, lower compression blocks are provided with above the compression punch-pin contacted with test specimen, below the compression cavity plate contacted with test specimen
Compression blocks in setting, the upper compression blocks are identical with the structure of lower compression blocks；Wherein cavity plate and upper compression blocks, compression punch-pin and
The junction of lower compression blocks, is respectively equipped with the right angle slideway of slightly below compression blocks brim height, and the right angle slideway is located at
Compress cavity plate and compression punch-pin center；
The compression cavity plate, which is equipped with, to be used to install the cavity plate blind hole with fixation measuring system；
The compression punch-pin is equipped with the mounting hole of installed load sensor, and is equipped with load transducer, load sensing
Device measures the load in compression process；The reduced cross-sectional below punch-pin is compressed, and is provided with and connect with testing machine
Circular hole channel；
Displacement sensor measures the change in displacement that cavity plate and compression punch-pin are compressed in compression process；
The upper compression blocks and lower compression blocks use stepped design, specially include multistage step, adopt between each step
With arc transition, the front end contacted with compression specimens is planar structure, and the size relationship between each step meets following relationship:
di≤3di+1 (1)
bi≤3bi+1 (2)
hi+1> (bi-bi+1) (3)
hi+1> (di-di+1) (4)
In formula, diFor the length of i-stage step, biFor the width of i-stage step, hi+1For the height of i+1 step, wherein
I is positive integer.
Preferably, { 1,2,3 } i ∈, i.e., the described upper compression blocks and lower compression blocks are four Duan Taijie, that is, include above and below transversal
Second step, third step and the 4th step that the identical first step of cross-sectional area and cross-sectional area successively reduce.
Preferably, the compression cavity plate surrounding is evenly distributed with bolt hole, completes to assemble by fixing bolt and testing machine.
Preferably, the installation and replacement of upper compression blocks and lower compression blocks are controlled by the tightness of fastening bolt.
With plate thickness from the plate thickness to resistance of deformation test mould to resistance of deformation automatic measurement system, it is described
Displacement sensor is extensometer, comprising: load transducer, measuring rod, measures solid block, institute's displacement sensors at displacement sensor
The change in displacement that cavity plate and compression punch-pin are compressed in compression process is measured；The load transducer is mounted on compression punch-pin
Mounting hole in, the measuring rod is fixed on the solid block of measurement, described to measure solid block and be fixed on compression cavity plate by gravity
On.It measures and offers solid block blind hole on solid block, the solid block diameter of blind hole is less than compression cavity plate blind hole diameter, and compression cavity plate is blind
Kong Yugu block blind hole constitutes stepped hole, described to measure below solid block, inwardly drills through shallower circular groove；It is described to measure solid block
It is engaged with outer sleeve screw thread, suspension hook is equipped with above the outer sleeve；
The measuring rod uses staged articulated structure, the upper measuring rod successively to successively decrease including diameter from top to bottom and from upper
The lower measuring rod successively to successively decrease to lower diameter, the upper measuring rod realize close connection by larger diameter and positioning bolt on top
It closes, and offers anti-rotation groove, middle part is mounted with compressed spring, and there is external screw thread in the outside of lower part, and inside center is equipped with
Threaded hole, it is external to be installed by positioning screw cap, it is completed by the effect of the inhibition and spring of stepped hole in a certain range
Interior straight reciprocating motion.
Lower measuring rod top is connect by the threaded hole at middle part center with upper measuring rod, and is fixed by locking nut,
It is the right cylinder type probe with ball angle below lower measuring rod, and is contacted with the upper surface of compression punch-pin.
The method that plate thickness is tested to resistance of deformation is carried out using the system, includes the following steps: to make on lower compression blocks
Row, compresses test specimen, while applying upward power to bottom end ball angle, drives entire measuring rod to move up, to make
Portion measures pin and generates displacement, and lower leg remains unchanged at this time, generates change in displacement between upper and lower pin.Obtain test specimen pressure
The compressive deformation of compression process.And its compressing force is measured by load transducer.
Concrete operation step are as follows: upper measuring rod and lower measuring rod are linked together first, it is then solid by tightening bolt
It is fixed, it penetrates and measures in the hole that solid block opens up, and compressed spring is inserted in the middle part of measuring rod, by positioning bolt, prevent spring bullet
Out, thus composition can straight line shrink measuring system, will compression cavity plate with compression punch-pin by corresponding connection structure and test
Machine is connected；
Then this measuring system is placed on compression cavity plate, bottom end ball angle is gently contacted with compression cavity plate；It will be straight
Angle locating piece, cushion block and mounting plate are placed on cavity plate, when installing compression blocks, are adjacent to right angle locating piece, then taken out, complete
Pairs of compression blocks debug moderate, tighten right angle slideway, and test test specimen is put in wherein, opens load sensing by fixed compression blocks
The data display equipment of device and displacement sensor, is tested.
The present invention compared with prior art possessed by the utility model has the advantages that
1) upper mould is installed on using measuring device of extending, can be according to testing machine the case where, light installation and removal.
And load transducer is installed on lower mould, complete to the displacement and load real-time measurement in compression process, realize compression and
Measurement integration.
2) plunger type spring reciprocating structure is used, can make measuring rod after completing measurement task every time, is restored to original
Initial position, measured next time.
3) module slideway mechanism is used, by the reasonable control to bolt looseness, the process of replacement compression blocks is realized, reaches
Change the purpose of compressing area.
4) the shape design of compression blocks, is analyzed by reasonable force path, complete in the case where guaranteeing that power transmits reasonable situation
The appropriate loss of weight of pairs of compression blocks and avoid damage in compression process.
5) test specimen abutting placed on it is completed by debugging of the upper/lower die to moderate using mounting plate and right angle locating piece.
6) real-time measurement and acquisition realized in compression process to load and displacement can be facilitated, mentioned for Sheet metal forming processing
For complete test data；The device can be convenient replacement compression blocks (21) (22) to realize the test of different compressing areas, and
With good centering effect.Function to testing machine will be substantially reduced by having the resistance of deformation test mould of good measuring system
It is required that convenient test carries out.
Detailed description of the invention
Fig. 1 is compression blocks force structure schematic diagram in the prior art.
Fig. 2 is the schematic diagram that Plane Strain Compression loads sample in the prior art.
Fig. 3 is resistance of deformation test mould assembling schematic diagram of the invention.
Fig. 4 is the enlarged drawing at Fig. 3 A.
Fig. 5 is the enlarged drawing at Fig. 3 B.
Fig. 6 is centering scheme of installation of the invention.
Specific label is as follows in figure:
1- compresses punch-pin, and 2- has the right cylinder type probe at ball angle, measuring rod under 3-, and 4- compresses cavity plate, 5- locking nut, 6-
Positioning screw cap, 7- compressed spring, 8- cavity plate blind hole, 9- consolidate block blind hole, the upper measuring rod of 10-, 11- anti-rotation groove, 12- suspension hook, 13-
Positioning bolt, 14- outer sleeve, 15- extensometer, the solid block of 16- measurement, 17- circular groove, 18- connection bolt, 19- fastening bolt,
The right angle 20- slideway, the upper compression blocks of 21-, compression blocks under 22-, 23- mounting hole, 24- circular hole channel, the right angle 25- locating piece, 26- pad
Block.
Specific embodiment
The present invention is further described for embodiment with reference to the accompanying drawings and detailed description,
As seen in figures 3-6, the plate thickness that one kind disclosed by the invention detects automatically is to resistance of deformation test mould.
As shown in figure 3, resistance of deformation test mould assembling structure of the invention are as follows: the compression use of cavity plate 4 is discoid, is located at
Above the test specimen of test, it is uniformly distributed bolt hole 18 in its surrounding, completes to assemble by fixing bolt and testing machine.Compress punch-pin
1 is located at below the test specimen of test, uses identical structure with compression cavity plate.Respectively above the punch-pin 1 contacted with test specimen with cavity plate 5
The identical compression blocks mounting structure up and down of lower section setting.Wherein in cavity plate 4 and upper compression blocks 21, compression punch-pin 1 and lower compression blocks
22 junction is placed in cavity plate and punch-pin by the module right angle slideway 20 that design is slightly below compression blocks brim height respectively
The heart rationally controls the installation of compression blocks 21 and lower compression blocks 22 by the tightness of fastening bolt 19.What the present invention used
Concavity slideway is that the test specimen tested in order to prevent slides laterally, improve test specimen and compression blocks to moderate.And by bolt
The process of replacement compression blocks is realized in the reasonable control loosened, achievees the purpose that change compressing area.And it is opened up on cavity plate 4 recessed
Mould blind hole 8, for installing and fixation measuring system.
On body of punch, it is equipped with mounting hole 23, so that reasonable installation load transducer, carrys out real-time detection plate compressed
The magnitude of load of tests exemplar is acted in journey.The lower section reduced cross-sectional of punch-pin 1, and it is provided with circular hole channel 24 and testing machine
Connection.
In the present invention compression blocks 21 and lower compression blocks 22 be designed as transmit calculation method by using power, complete a variety of pressures
The matching used multi-ladder compression blocks of contracting area measurement reduce the loss of power and the consumption of material in transmittance process.Pass through installation
Test specimen abutting placed on it is completed compression blocks centering debugging by plate and right angle locating piece 25.
Wherein upper compression blocks 21 and lower compression blocks 22 use stepped design, specially include that multistage cross-sectional area successively contracts
Small step, arc transition is used between each step, and front end contact with compression specimens is planar structure.Specific to this implementation
Example, as shown in figure 3, upper compression blocks 21 and lower compression blocks 22 are four Duan Taijie, that is, it include that transversal cross-sectional area up and down is identical
Second step, third step and the 4th step that first step and cross-sectional area successively reduce.Wherein the 4th step and compression
Test specimen contact.In order to guarantee effective transmitting of load and loss of weight in compression process, pass through the specific dimensions meter to its length
It calculates, completes the design of multi-ladder compression blocks, the size relationship between 2-4 grades of steps are as follows:
di≤3di+1 (1)
bi≤3bi+1 (2)
hi+1> (bi-bi+1) (3)
hi+1> (di-di+1) (4)
In formula, diFor the length of i-stage step, biFor the width of i-stage step, hi+1For the height of i+1 step, i ∈
{ 1,2,3 }；
Simultaneously to round-corner transition is used between steps at different levels, to realize effective transmitting of load in compression process.By upper
State design method, can longitudinal loading force concentrated on fixed area toward the concentration at middle part, while avoiding die-offing because of sectional area
Cause compression blocks to damage during the work time, and plays good weight loss effect.
The present invention also discloses the plate thickness with above-mentioned mold to resistance of deformation automatic measurement system, by that will draw
The size that meter is installed on compression cavity plate measurement test plate deformation is stretched, load transducer is installed on compression cavity plate, real-time monitoring
The magnitude of load that testing machine applies test plate.Two kinds of devices are equipped with data display equipment, during can directly displaying test
Required parameter size completes the calculating to sheet material resistance to plane deformation size.Realize measurement, compression integrated, drop
The low requirement to testing machine.
This measuring system integrates load measurement and displacement measurement, comprising: load transducer, extensometer 15, measuring rod
Lower 3, the parts such as upper measuring rod 10, the solid block 16 of measurement.Wherein load transducer is mounted in the mounting hole 23 of punch-pin 1, is directly supervised
Survey the magnitude of load that testing machine acts on tests exemplar.Due to more demanding to precise structure degree, displacement is set up in view of this and is surveyed
Measure device.Displacement measurement is measured using extensometer 15, because it has the characteristics that light structure, easy to use, reliable and stable, but
Due to the restricted problem of 15 size of extensometer, between measuring pin cannot directly be fixedly mounted with concave-convex mold, therefore the present invention uses
Connect the measurement method that the i.e. upper measuring rod 10 of double rod and lower measuring rod 3 combine.Upper measuring rod 10 is fixed on the solid block 16 of measurement, measurement
Gu block 16 is fixed on cavity plate 4 by gravity.It measures and opens up solid block blind hole 9 on solid block 16, Gu the diameter of block blind hole 9 is less than
8 diameter of cavity plate blind hole is compressed, compression cavity plate blind hole 8 and solid block blind hole 9 constitute stepped hole.For prevent residue in experimental enviroment,
Iron filings etc. float on 6 upper surface of cavity plate, influence measurement accuracy, are measuring below solid block 16, are inwardly drilling through shallower circular groove 17,
Reduce influence of the residue to measurement result precision in experimental situation.It measures and is cast with screw thread outside solid block 16, with 14 screw thread of outer sleeve
Engagement removes and installs displacement measurement system using suspension hook 12 above sleeve at any time.
Measuring rod is designed using multi-ladder segment type, oneself for completing to measure every time is designed using plunger type spring reciprocating structure
Dynamic return, and it is easy to carry, and diameter successively successively decreases whole cylindrical bar from top to bottom.From figure 3, it can be seen that upper measuring rod 10 includes
Close association is realized by larger diameter and positioning bolt 13 in the biggish top of area, while the top for connecting extensometer 15 is surveyed
Pin is measured, upper measuring rod top opens up anti-rotation groove 11 simultaneously.Upper 10 middle part of measuring rod is mounted with compressed spring 7, outside lower section
Portion is furnished with external screw thread, is equipped with threaded hole in center.Outside is installed by positioning screw cap 6, by the inhibition of stepped hole and
Straight reciprocating motion in a certain range is completed in the effect of compressed spring 7.Lower measuring rod bottom is the right cylinder with ball angle
Type probe 2, top are connect with the threaded hole at upper measuring rod center, and fixed by locking nut 5, guarantee the vertical of measuring rod
Degree and globality.The segment type design method of measuring rod of the present invention reduces the difficulty of part processing, easy to carry.
When being worked using resistance of deformation test mould, under upper measuring rod 10 and measuring rod 3 are connected to one first
It rises, is then fixed by tightening bolt, penetrate and measure in the hole that solid block 16 opens up, and compressed spring 7 is inserted in the middle part of measuring rod,
By positioning bolt, prevent spring from popping up, thus composition can straight line shrink measuring system.It will compression cavity plate 6 and compression punch-pin 1
It is connected by corresponding connection structure with testing machine.Then, this measuring system is placed on compression cavity plate 6, by bottom end
Ball angle is gently contacted with compression cavity plate 6.Right angle locating piece 25, cushion block 26 and mounting plate are placed on cavity plate 6, compression blocks are installed
When, it is adjacent to right angle locating piece 25, is then taken out, completes to debug moderate compression blocks.Tighten right angle slideway 20, fixed pressure
Test test specimen is put in wherein, opens the data display equipment of load transducer and extensometer, tested by contracting block.
The pin on extensometer top connects the top of upper measuring rod 10, and the pin connection of lower part measures the company of solid 16 top of block
Relay part, when being tested, 1) compression blocks uplink under, compresses test specimen, while applying upward power, band to bottom end ball angle
Entire measuring rod is moved to move up, so that top measurement pin is made to generate displacement, and lower leg remains unchanged at this time, draws up and down
Change in displacement is generated between foot.Obtain the compressive deformation of test specimen compression process.And its compressing force is measured by load transducer, it tests
After, lower compression blocks downlink is gone under the action of compressed spring with measuring rod at present, homing.
The displacement sensing of the other forms such as grating scale also can be used in addition to extensometer in displacement sensor used in the present invention
Device.
Resistance of deformation test mould disclosed in this invention and system can provide for roll-force when calculating cold-rolling of steel plate
Design considerations.
Although for illustrative purposes, it has been described that exemplary embodiments of the present invention, those skilled in the art
Member it will be understood that, can be in form and details in the case where the scope and spirit for not departing from invention disclosed in appended claims
On the change that carry out various modifications, add and replace etc., and all these changes all should belong to appended claims of the present invention
Protection scope, and each step in the claimed each department of product and method, can in any combination
Form is combined.Therefore, to disclosed in this invention the description of embodiment be not intended to limit the scope of the invention,
But for describing the present invention.Correspondingly, the scope of the present invention is not limited by embodiment of above, but by claim or
Its equivalent is defined.
Claims (7)
1. the plate thickness that detects automatically of one kind is to resistance of deformation test mould, it is characterised in that: convex including compression cavity plate, compression
Mould, displacement sensor, load transducer, wherein the compression cavity plate is located above the test specimen of measurement, the compression punch-pin is located at
Below test specimen, lower compression blocks are provided with above the compression punch-pin contacted with test specimen, below the compression cavity plate contacted with test specimen
Compression blocks in setting, the upper compression blocks are identical with the structure of lower compression blocks；Wherein cavity plate and upper compression blocks, compression punch-pin and
The junction of lower compression blocks, is respectively equipped with the right angle slideway of slightly below compression blocks brim height, and the right angle slideway is located at
Compress cavity plate and compression punch-pin center；
The compression cavity plate, which is equipped with, to be used to install the cavity plate blind hole with fixation measuring system；
The compression punch-pin is equipped with the mounting hole of installed load sensor, and is equipped with load transducer, load transducer pair
Load in compression process measures；The reduced cross-sectional below punch-pin is compressed, and is provided with the circular hole connecting with testing machine
Channel；
Displacement sensor measures the change in displacement that cavity plate and compression punch-pin are compressed in compression process；
The upper compression blocks and lower compression blocks use stepped design, specially include multistage step, use circle between each step
Arc transition, the front end contacted with test specimen are planar structure, and the size relationship between each step meets following relationship:
di≤3di+1 (1)
bi≤3bi+1 (2)
hi+1> (bi-bi+1) (3)
hi+1> (di-di+1) (4)
In formula, diFor the length of i-stage step, biFor the width of i-stage step, hi+1For the height of i+1 step, i is positive whole
Number.
2. the plate thickness that one kind according to claim 1 detects automatically is to resistance of deformation test mould, it is characterised in that: institute
Stating compression blocks and lower compression blocks is four Duan Taijie, that is, includes the transversal identical first step of cross-sectional area up and down, and horizontal
Second step, third step and the 4th step that sectional area successively reduces.
3. the plate thickness that one kind according to claim 1 to 2 detects automatically is to resistance of deformation test mould, it is characterised in that:
The compression cavity plate surrounding is evenly distributed with bolt hole, completes to assemble by fixing bolt and testing machine.
4. the plate thickness that one kind according to claim 1 to 3 detects automatically is to resistance of deformation test mould, it is characterised in that:
The installation and replacement of upper compression blocks and lower compression blocks are controlled by the tightness of fastening bolt.
5. the plate thickness with any one of claim 1-4 the plate thickness to resistance of deformation test mould is automatic to resistance of deformation
Measuring system characterized by comprising load transducer, measuring rod, measures solid block, institute's displacement sensors at displacement sensor
The change in displacement that cavity plate and compression punch-pin are compressed in compression process is measured；The load transducer is mounted on compression punch-pin
Mounting hole in, the measuring rod is fixed on the solid block of measurement, described to measure solid block and be fixed on compression cavity plate by gravity
On.It measures and offers solid block blind hole on solid block, the solid block diameter of blind hole is less than compression cavity plate blind hole diameter, and compression cavity plate is blind
Kong Yugu block blind hole constitutes stepped hole, described to measure below solid block, inwardly drills through shallower circular groove；It is described to measure solid block
It is engaged with outer sleeve screw thread, suspension hook is equipped with above the outer sleeve；
The measuring rod uses staged articulated structure, the upper measuring rod successively to successively decrease including diameter from top to bottom and from top to bottom
The lower measuring rod that diameter successively successively decreases, the upper measuring rod realize close association by larger diameter and positioning bolt on top,
And anti-rotation groove is offered, middle part is mounted with compressed spring, and there is external screw thread in the outside of lower part, and inside center is equipped with screw thread
Hole, it is external to be installed by positioning screw cap, it is completed in a certain range by the effect of the inhibition and spring of stepped hole
Straight reciprocating motion.
Lower measuring rod top is connect by the threaded hole at middle part center with upper measuring rod, and is fixed by locking nut, lower survey
It is the right cylinder type probe with ball angle below gauge rod, and is contacted with the upper surface of compression punch-pin.
6. carrying out the method that plate thickness is tested to resistance of deformation using system described in claim 5, which is characterized in that including as follows
Step: making lower compression blocks uplink, compress to test specimen, while applying upward power to bottom end ball angle, drives entire measuring rod
It moves up, so that top measurement pin is made to generate displacement, and lower leg remains unchanged at this time, generates position between upper and lower pin
Move variation.Obtain the compressive deformation of test specimen compression process.And its compressing force is measured by load transducer, after experiment, push
Contracting block downlink is gone under the action of compressed spring with measuring rod at present, homing.
7. the method tested using plate thickness as claimed in claim 6 to resistance of deformation, which is characterized in that concrete operation step
Are as follows: upper measuring rod and lower measuring rod are linked together first, then fixed by tightening bolt, penetrates and measures what solid block opened up
In hole, and compressed spring is inserted in the middle part of measuring rod, by positioning bolt, prevents spring from popping up, so that composition can straight line contraction
Measuring system, compression cavity plate is connected with testing machine with punch-pin is compressed by corresponding connection structure；
Then this measuring system is placed on compression cavity plate, bottom end ball angle is gently contacted with compression cavity plate；Right angle is determined
Position block, cushion block and mounting plate are placed on cavity plate, when installing compression blocks, are adjacent to right angle locating piece, then taken out, completion pair
Compression blocks debug moderate, tighten right angle slideway, fixed compression blocks, and test test specimen is put in wherein, open load transducer with
The data display equipment of displacement sensor, is tested.
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| CN113670719A (en) * | 2021-08-09 | 2021-11-19 | 华南理工大学 | Plane strain compression test die with one die for dual purposes |
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|---|---|
| CN109975105B (en) | 2021-02-09 |
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