CN107543638A - Stannum plaster scribing knife pressure test device and its detection method based on foil gauge - Google Patents
Stannum plaster scribing knife pressure test device and its detection method based on foil gauge Download PDFInfo
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- CN107543638A CN107543638A CN201610485827.5A CN201610485827A CN107543638A CN 107543638 A CN107543638 A CN 107543638A CN 201610485827 A CN201610485827 A CN 201610485827A CN 107543638 A CN107543638 A CN 107543638A
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- foil gauge
- pressure
- scribing knife
- tablet
- cantilever beam
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Abstract
The invention discloses a kind of stannum plaster scribing knife pressure test device based on foil gauge, including：One support platform；Level is placed with the tablet of the support platform upper surface；It is positioned over four foil gauges of the tablet；Four bridge circuits and amplification circuit module for being arranged at the tablet and being electrically connected with respectively with four foil gauges correspondingly；It is arranged at the tablet and the signal acquisition module being electrically connected with respectively with four bridge circuits and amplification circuit module；Four pressure transmission structures being in the form of a column being arranged between the tablet and bearing plate.It can realize the test of scraper pressure and scraper speed during paste solder printing, while can also judge whether scraper is occurring the inclined situation of scraper pressure along motion vertical direction.The invention also discloses a kind of stannum plaster scribing knife method for testing pressure based on foil gauge.
Description
Technical field
The present invention relates to a kind of pressure test device, and in particular to stannum plaster scribing knife pressure test device, more specifically
For, it is related to a kind of stannum plaster scribing knife pressure test device and its detection method based on foil gauge.
Background technology
In electronic product surface mounting technology equipment (Surface Mounted Technology, SMT),
Need to scratch the tin material of uniform uniform thickness on the PCB relevant positions of device attachment, to ensure that tin cream thickness meets
The requirement of subsequent reflow welding process.Paste solder printing is process most complicated in SMT techniques, least stablizing, by
The influence of a variety of composite factors.Stannum plaster scribing knife pressure is smeared quality to tin cream with scraper speed and had a major impact,
Pressure of the scraper in steel mesh typically is controlled by being pre-adjusted scraper height to optimum state, passes through motor control
The scraper speed of service processed, so that it is guaranteed that tin cream smears quality.Due to multiple-contact stress in running, scrape
Knife pressure can be varied from, quantitative test scraper pressure and the scraper speed of service can effectively improve technological design and
Plant maintenance is horizontal.
At present, it is fewer to detect the means of testing of scraper pressure in real time for the SMT stannum plaster scribing knifes course of work,
Pressure is typically estimated by the location position of scraper controlled motor, or using force snesor module detection axle
To pressure.Temporarily do not integrate single induction module mechanism and can simultaneous quantitative detection paste solder printing mistake
Scraper pressure and the EM equipment module of scraper speed in journey.
For this reason, it is necessary to a kind of new stannum plaster scribing knife pressure test device based on strain detecting mechanism is designed,
To overcome above mentioned problem.
The content of the invention
The technical problem to be solved in the present invention is, for prior art in electronic product surface mount process
Stannum plaster scribing knife pressure test device can not be integrated in single induction module and simultaneous quantitative detects paste solder printing mistake
A kind of scraper pressure and the problem of scraper speed in journey, there is provided stannum plaster scribing knife pressure based on strain detecting mechanism
Test device, its scraper pressure and scraper speed that occupies little space and can test simultaneously during paste solder printing
Degree.
Technical scheme is used by the present invention solves its problem：A kind of stannum plaster scribing knife based on foil gauge is provided
Pressure test device, including：
In flat tablet, have through the tablet the second through hole and be placed in described second
The cantilever beam in strip of through hole, the cantilever beam have the root being connected with the side wall of second through hole
And away from the root and the afterbody that is not contacted with the side wall of second through hole；
The pressure transmission structure being in the form of a column being arranged on the afterbody；
The foil gauge being arranged on the root；
The bridge circuit and amplification circuit module being installed on the tablet, the bridge circuit and amplification electricity
Road module is electrically connected with the foil gauge；
The signal acquisition module being installed on the tablet, the signal acquisition module are electrically connected with the electricity
Bridge circuit and amplification circuit module；
And the bearing plate on the pressure transmission structure is arranged at, for accepting the pressure of stannum plaster scribing knife application
Power.
In the stannum plaster scribing knife pressure test device provided by the invention based on foil gauge, the tablet has
Second through hole of four symmetric arrays and four are in strip and are respectively contained in four correspondingly
The cantilever beam of individual second through hole, the cantilever beam elongatedness direction consistency of thickness.
In the stannum plaster scribing knife pressure test device provided by the invention based on foil gauge, including with flat board
The support platform of shape supporting plate, the sensing plate level is placed with the supporting plate, in the supporting plate
Portion is provided with the first through hole through the supporting plate, and the first through hole is with second through hole in same level
Orthographic projection on face has overlapping region, and the first through hole covers the cantilever beam in the orthographic projection of horizontal plane
In the orthographic projection of same level.
In the stannum plaster scribing knife pressure test device provided by the invention based on foil gauge, four pressure pass
Pass structure and be respectively arranged at four afterbodys correspondingly, the height of the pressure transmission structure is more than institute
State bridge circuit and amplification circuit module and the height of signal acquisition module.
In the stannum plaster scribing knife pressure test device provided by the invention based on foil gauge, the pressure transmission knot
Structure includes outer sleeve, inner sleeve and ball, and the inner sleeve is opening up to be supported in the afterbody, the rolling
Pearl can be contained in the inner sleeve horizontal rolling, the outer sleeve is opening down be contained in the inner sleeve and
Support the bearing plate.
In the stannum plaster scribing knife pressure test device provided by the invention based on foil gauge, the bearing plate and institute
State and two first baffles being oppositely arranged and two second baffles being oppositely arranged are provided between tablet, described first
Baffle length is more than the second baffle, and the height of the first baffle and second baffle is respectively less than the pressure
The height of transferring structure, two first baffles, two second baffles and the tablet surround one
Individual accommodation space, the foil gauge, bridge circuit and amplification circuit module, pressure transmission structure and signal are adopted
Collection module is contained in the accommodation space, and two third baffles are individually fixed in relative the two of the bearing plate
The lower section of lateral margin, two third baffles are fitted vertically in the bearing plate and are located at the accommodation space
Outside.
In the stannum plaster scribing knife pressure test device provided by the invention based on foil gauge, the support platform tool
There are four flat column support blocks to extend to be formed straight down from the four of the supporting plate vertex respectively, it is described
Support block have connection and two side walls perpendicular to the supporting plate, connect two side walls bottom wall with
And put down from the bottom wall towards the installing plate of the horizontal-extending formation in direction away from the supporting plate, the installing plate
Row is in the supporting plate, and the upper surface of the installing plate is less than the bottom surface of the third baffle.
The present invention also provides a kind of stannum plaster scribing knife method for testing pressure based on foil gauge, including：
Length direction of the stannum plaster scribing knife along the cantilever beam moves horizontally；
The bearing plate bears the pressure of the stannum plaster scribing knife and is delivered to institute by the pressure transmission structure
State the afterbody of cantilever beam；
The cantilever beam produces corresponding flexural deformation；
The foil gauge of the cantilever beam root senses deflection caused by the cantilever beam and produces corresponding electricity
Resistive；
When the resistance variations of the foil gauge change output voltage through the bridge circuit and amplification circuit module
Sequential signal；
The signal acquisition module gathers the voltage clock signal and output digit signals power supply brain post processing；
The computer draws the dynamic time sequence curve of the foil gauge according to the data signal.
In the stannum plaster scribing knife method for testing pressure of the present invention based on foil gauge, including：Answered according to described
The dynamic time sequence curve for becoming piece draws the translational speed curve of the stannum plaster scribing knife.
In the stannum plaster scribing knife method for testing pressure of the present invention based on foil gauge, including：According to difference
The dynamic time sequence curve of the foil gauge of position judges whether the stannum plaster scribing knife balances in moving process.
Implement the stannum plaster scribing knife pressure test device provided by the invention based on foil gauge, have below beneficial to effect
Fruit：
1st, when the stannum plaster scribing knife moves in longitudinally of the pressure-bearing plate surface along the cantilever beam,
The stannum plaster scribing knife can pass to described answer to the power that the bearing plate applies by the pressure transmission structure
Become piece, the resistance of the foil gauge changes, and the bridge circuit and amplification circuit module are by foil gauge
Resistance variations are converted into voltage signal, and the signal acquisition module can gather the voltage signal, thus may be used
Obtain the dynamic time sequence curve of the foil gauge, i.e., the pressure that described foil gauge is born changes with time song
Line, the dynamic test of scraper pressure during paste solder printing is achieved in, during according to the dynamic of the foil gauge
Overture line draws scraper speed curve, is achieved in the test to the stannum plaster scribing knife speed.
2nd, it may determine that the stannum plaster scribing knife in movement according to the dynamic time sequence curve of the foil gauge of diverse location
During whether keep balancing.
3rd, realize bearing plate, pressure transmission structure, tablet, bridge circuit with putting in limited space
Circuit module and signal acquisition module is integrated greatly, thus conveniently installs and uses.
4th, the pressure transmission structure includes outer sleeve, inner sleeve and ball, and the inner sleeve is opening up
The afterbody is supported in, the ball can be contained in the inner sleeve, the outer sleeve opening horizontal rolling
The inner sleeve and the support bearing plate are housed down, thus reduce non-perpendicular active force in power conductive process
Component.
Brief description of the drawings
Fig. 1 is three-dimensional group of the stannum plaster scribing knife pressure test device preferred embodiment of the invention based on foil gauge
Close figure；
Fig. 2 is the internal junction of the stannum plaster scribing knife pressure test device preferred embodiment of the invention based on foil gauge
Structure schematic diagram；
Fig. 3 is the solid point of the stannum plaster scribing knife pressure test device preferred embodiment of the invention based on foil gauge
Xie Tu；
Fig. 4 is the stannum plaster scribing knife pressure test device preferred embodiment provided by the invention based on foil gauge
The stereogram of support platform；
Fig. 5 is the stannum plaster scribing knife pressure test device preferred embodiment provided by the invention based on foil gauge
The stereogram of tablet；
Fig. 6 is the stannum plaster scribing knife pressure test device preferred embodiment provided by the invention based on foil gauge
The three-dimensional exploded view of pressure transferred structure；
Fig. 7 is the flow chart of the stannum plaster scribing knife method for testing pressure provided by the invention based on foil gauge；
Fig. 8 is the stannum plaster scribing knife pressure test device preferred embodiment provided by the invention based on foil gauge
The cantilever beam pressure output value obtained when detecting dynamic time sequence figure；
Fig. 9 is the cantilever beam of the stannum plaster scribing knife pressure test device preferred embodiment of the invention based on foil gauge
Relevant parameter schematic diagram.
The drawing reference numeral explanation of embodiment：
| Support platform | 1 | Supporting plate | 11 |
| First through hole | 111 | Support block | 12 |
| Side wall | 121 | Bottom wall | 122 |
| Installing plate | 123 | Mounting hole | 1231 |
| Tablet | 2 | Second through hole | 21 |
| Cantilever beam | 22 | Root | 221 |
| Afterbody | 222 | Connecting portion | 223 |
| Foil gauge | 3 | Bridge circuit and amplification circuit module | 4 |
| Signal acquisition module | 5 | Pressure transmission structure | 6 |
| Outer sleeve | 61 | Ball | 62 |
| Inner sleeve | 63 | Column | 631 |
| First baffle | 71 | Second baffle | 72 |
| Third baffle | 73 | Bearing plate | 8 |
| Stannum plaster scribing knife | 9 |
Embodiment
In order to which technical characteristic, purpose and the effect of the present invention is more clearly understood, it is detailed now to compare accompanying drawing
Describe bright embodiment of the invention in detail.
As shown in figures 1 and 3, it is a kind of stannum plaster scribing knife pressure test based on foil gauge provided by the invention
The preferred embodiment of device, including support platform 1, tablet 2, foil gauge 3, bridge circuit and amplification
Circuit module 4, pressure transmission structure 6, signal acquisition module 5, bearing plate 8, first baffle 71,
Two baffle plates 72 and third baffle 73.
As shown in Figure 3 and Figure 4, support platform 1, which has, is rectangle flat supporting plate 11, and
Four vertex of self-supporting slab 11 extend four flat column support blocks 12 of formation straight down respectively.Branch
The middle part of fagging 11 is provided with the first through hole 111 being rectangle through supporting plate 11.Four support blocks 12
Be respectively provided with connection and two side walls 121 perpendicular to supporting plate 11 and connection two side walls 121 bottom wall
122, bottom wall 122 is parallel to supporting plate 11.Prolong from bottom wall 122 towards the direction level away from supporting plate 11
Stretch to form an installing plate 123, there is installing plate 123 mounting hole 1231 through installing plate 123 to be used for
The fixed support platform 1 of installation.
As Fig. 3 and Fig. 5 tablets 2 are rectangle, level is placed with the upper surface of supporting plate 11.Tablet
2 are made by the highly stable 40CrNiMoA steel alloys of modulus of elasticity, with ensure high elastic limit with it is strong
The limit is spent, and maintains modulus of elasticity constant in moderate finite deformation amount and temperature range.Tablet 2 is provided with four
Through the second long and narrow through hole 21 of tablet 2, and four cantilever beams 22 in strip.Four
Two through holes 21 divide symmetrical arrangement, respectively positioned at the upper left of tablet 2, upper right, lower-left and bottom-right location,
Each orthographic projection of the second through hole 21 with first through hole 111 in same level has overlapping region.
Four cantilever beams 22 are respectively contained in four the second through holes 21 correspondingly, are placed in the of top-left position
Horizontal protrude out to the left of the right side wall 121 of the cantilever beam 22 of two through holes 21 from corresponding second through hole 21 to be formed,
The cantilever beam 22 of the second through hole 21 of upper-right position is placed in from the left side wall 121 of corresponding second through hole 21
Level protrudes out to be formed to the right, is placed in the cantilever beam 22 of the second through hole 21 of lower left position from corresponding second
The right side wall 121 of through hole 21 is horizontal to be protruded out to be formed to the left, be placed in bottom-right location the second through hole 21 it is outstanding
Horizontal protrude out to the right of the left side wall 121 of arm beam 22 from corresponding second through hole 21 to be formed.Cantilever beam is by precision
It is machined into, cantilever beam consistency of thickness along its length and be 1/3rd of the thickness of tablet 2.Often
One cantilever beam 22 is respectively provided with the root 221 being connected with the side wall 121 of the second through hole 21, remote root 221
And the afterbody 222 and connection root 221 and afterbody 222 not contacted with the side wall 121 of the second through hole 21
Connecting portion 223.First through hole 111 covers cantilever beam 22 in same level in the orthographic projection of horizontal plane
Orthographic projection.
As shown in Figures 2 and 3, four foil gauges 3 stick in four cantilever beams 22 respectively correspondingly
Root 221 on, the size of the deflection for sensing cantilever beam.Four bridge circuits and amplifying circuit mould
Block 4 is horizontally installed on tablet 2, and four bridge circuits are arranged into rule with amplification circuit module 4
Rectangular array and it is electrically connected with respectively with four foil gauges 3 correspondingly, for by the resistance change of sensing chip
Rate is converted into voltage signal.Signal acquisition module 5 is installed on tablet 2, and logical positioned at two second
Between hole 21, signal acquisition module 5 is electrically connected with four bridge circuits with amplification circuit module 4 respectively,
The voltage signal exported for gathering four bridge circuits with amplification circuit module 4.
As shown in Figure 3 and Figure 6, four pressure transmission structures 6 are in the form of a column and are respectively arranged at correspondingly
On four afterbodys 222, the height of pressure transmission structure 6 is more than bridge circuit and amplification circuit module 4 and letter
The height of number acquisition module 5.Pressure transmission structure 6 includes outer sleeve 61, inner sleeve 63 and ball 62.
Inner sleeve 63 is opening up, and with a column 631 from the middle part of the bottom wall 122 of inner sleeve 63 straight down
Extension is formed, and column 631 is supported in afterbody 222.Ball 62 can be contained in inner sleeve 63 horizontal rolling,
Outer sleeve 61 is opening down to be closely set in outside inner sleeve 63.Bearing plate 8 is rectangle tabular, its
Size is slightly larger than the size of tablet 2, and bearing plate 8 is flatly mounted on four pressure transmission structures 6
Outer sleeve 61 on.
As shown in Figures 2 and 3, two first baffles being oppositely arranged are provided between bearing plate 8 and tablet 2
71 and two second baffles 72 that are oppositely arranged, the length of first baffle 71 be more than second baffle 72, first gear
The height of plate 71 and second baffle 72 is respectively less than the height of pressure transmission structure 6, two first baffles 71,
Two second baffles 72 and tablet 2 surround an accommodation space, foil gauge 3, bridge circuit and amplification
Circuit module 4, pressure transmission structure 6 and signal acquisition module 5 are contained in accommodation space.Two the 3rd
Baffle plate 73 is individually fixed in the lower section of the opposite sides edge of bearing plate 8, and two third baffles 73 are vertically solid
Due to bearing plate 8 and positioned at the outside of accommodation space, third baffle 73 is parallel to second baffle 72, and the 3rd
The bottom surface of baffle plate 73 is higher than the upper surface of installing plate 123.The lower surface of support block 12 is upper to bearing plate 8
The vertical height on surface is less than 60mm.
As shown in fig. 7, the present invention also provides a kind of stannum plaster scribing knife based on foil gauge with preferred embodiment
The detection method of pressure test device, including：Length direction of the stannum plaster scribing knife 9 along cantilever beam 22 is horizontal
Mobile (the signified direction of arrow in such as Fig. 1)；Bearing plate 8 bears the pressure of stannum plaster scribing knife 9 and passes through pressure
Power transferring structure 6 is delivered to the afterbody 222 of cantilever beam 22；Cantilever beam 22 produces corresponding flexural deformation；
The foil gauge 3 of the root 221 of cantilever beam 22 senses deflection caused by cantilever beam 22 and produces corresponding resistance
Change；The resistance variations of foil gauge 3 are changed output voltage sequential through bridge circuit and amplification circuit module 4 and believed
Number；The collection voltages clock signal of signal acquisition module 5 and output digit signals power supply brain post processing；Computer root
The dynamic time sequence curve of foil gauge 3 is drawn according to data signal；Drawn according to the dynamic time sequence curve of foil gauge 3
The translational speed curve of stannum plaster scribing knife 9；Tin is judged according to the dynamic time sequence curve of the foil gauge 3 of diverse location
Whether cream scraper 9 balances in moving process.
Specifically, the stannum plaster scribing knife pressure test device course of work based on foil gauge in preferred embodiment
In, corresponding steel mesh is pasted on bearing plate 8, stannum plaster scribing knife 9 is (perpendicular to the side of movement of stannum plaster scribing knife 9
Upward width is less than 80mm) (arrow in such as Fig. 1 is moved along the length direction of cantilever beam 22 from left to right
The signified direction of head), bearing plate 8 by stannum plaster scribing knife 9 pressure (between 50N-80N) and pass through pressure
Transferring structure 6 is distributed to the afterbody 222 of four cantilever beams 22.The structure of cantilever beam 22 produces flexural deformation,
The size of its deflection is sensed by the foil gauge 3 pasted in the root 221 of cantilever beam 22, its deflection
The normal pressure linear proportional that size applies with stannum plaster scribing knife 9 (in the case of in elastic range).Strain
The increased resistance value of piece 3 output voltage timing simulation after answering bridge circuit to be changed with amplification circuit module 4 is believed
Number, the collection voltages timing simulation signal of signal acquisition module 5 simultaneously exports corresponding data signal, computer according to
Data signal draws the dynamic time sequence curve (as shown in Figure 8) of each foil gauge 3.
In elastic range, pressure caused by stannum plaster scribing knife 9 and the strain data linear proportional of measurement, tool
Body calculation formula is described as follows：
Wherein (as shown in Figure 9),
F is the pressure that stannum plaster scribing knife 9 acts on the pressure on steel mesh surface namely bearing plate 8 is born；
εiFor the deflection output valve (being drawn by data signal) of i-th of cantilever beam 22；
EiFor the modulus of elasticity parameter corresponding to i-th of cantilever beam 22；
aiThe side wall for the second through hole being connected with root 221 is arrived for the foil gauge 3 on i-th of cantilever beam 22
Distance；
biFor i-th of cantilever beam 22 afterbody 222 end to stress point distance；
Li, hi, wiFor the dimensional parameters (long, high, wide) of i-th of cantilever beam 22.
The material character and geometric identity of four cantilever beams 22 in the present embodiment, the pressure of stannum plaster scribing knife 9
Expression formula can be reduced to：
WhereinThe pressure coefficient of stannum plaster scribing knife 9 of test device is defined as, is test device hardware
Characteristic parameter, its value is relevant with structure design and material property, and numerical value is bigger, represent structure design to table
Surface pressure is more sensitive.In linear interval range, the pressure of stannum plaster scribing knife 9 of the test device under static conditions
Coefficient can be demarcated to obtain by standard quality block.
It is instantaneously fast according to the dynamic time sequence curve of the single foil gauge 3 of four cantilever beams 22, stannum plaster scribing knife 9
The time series of degree is that derivation of the dynamic time sequence curve of the foil gauge 3 of cantilever beam 22 to the time obtains tin cream
The speed formula of scraper 9：
Wherein,
F1 is the pressure output value of the cantilever beam 22 for the second through hole 21 for being placed in top-left position；
F2 is the pressure output value of the cantilever beam 22 for the second through hole 21 for being placed in upper-right position；
F3 is the pressure output value of the cantilever beam 22 for the second through hole 21 for being placed in lower left position；
F4 is the pressure output value of the cantilever beam 22 for the second through hole 21 for being placed in bottom-right location；
L is the length dimension of cantilever beam 22.
Stannum plaster scribing knife can determine whether according to the dynamic time sequence curve of the single foil gauge 3 of four cantilever beams 22 simultaneously
Whether 9 balance during being moved from left to right along the length direction of cantilever beam 22.That is, when being placed in
The dynamic time sequence figure of the cantilever beam 22 of second through hole 21 of top-left position and it is placed in the second logical of lower left position
The dynamic time sequence figure of the cantilever beam 22 in hole 21 is consistent, and when the second through hole 21 for being placed in upper-right position
The dynamic time sequence figure of cantilever beam 22 and be placed in bottom-right location the second through hole 21 cantilever beam 22 dynamic
When timing diagram is consistent, you can judge that stannum plaster scribing knife 9 is in poised state in moving process, it is otherwise uneven
Weighing apparatus.
Implement the stannum plaster scribing knife pressure test device provided by the invention based on foil gauge, have below beneficial to effect
Fruit：
1st, when the stannum plaster scribing knife moves in longitudinally of the pressure-bearing plate surface along the cantilever beam,
The stannum plaster scribing knife can pass to described answer to the power that the bearing plate applies by the pressure transmission structure
Become piece, the resistance of the foil gauge changes, and the bridge circuit and amplification circuit module are by foil gauge
Resistance variations are converted into voltage signal, and the signal acquisition module can gather the voltage signal, thus may be used
Obtain the dynamic time sequence curve of the foil gauge, i.e., the pressure that described foil gauge is born changes with time song
Line, the dynamic test of scraper pressure during paste solder printing is achieved in, during according to the dynamic of the foil gauge
Overture line draws scraper speed curve, is achieved in the test to the stannum plaster scribing knife speed.
2nd, it may determine that the stannum plaster scribing knife in movement according to the dynamic time sequence curve of the foil gauge of diverse location
During whether keep balancing.
3rd, realize bearing plate, pressure transmission structure, tablet, bridge circuit with putting in limited space
Circuit module and signal acquisition module is integrated greatly, thus conveniently installs and uses.
4th, the pressure transmission structure includes outer sleeve, inner sleeve and ball, and the inner sleeve is opening up
The afterbody is supported in, the ball can be contained in the inner sleeve horizontal rolling, and the outer sleeve is opened
Mouth down houses the inner sleeve and the support bearing plate, thus reduces non-perpendicular work in power conductive process
Component firmly.
Embodiments of the invention are described above in conjunction with accompanying drawing, but the invention is not limited in upper
The embodiment stated, above-mentioned embodiment is only schematical, rather than restricted
, one of ordinary skill in the art is not departing from present inventive concept and right under the enlightenment of the present invention
It is required that under the ambit protected, many forms can be also made, these belong to the protection model of the present invention
Within enclosing.
Claims (10)
- A kind of 1. stannum plaster scribing knife pressure test device based on foil gauge, it is characterised in that including：In flat tablet (2), have the second through hole (21) through the tablet (2) with And it is placed in the cantilever beam (22) in strip of second through hole (21), the cantilever beam (22) The root (221) and the remote root being connected with the side wall (121) with second through hole (21) (221) afterbody (222) and not contacted with the side wall (121) of second through hole (21)；The pressure transmission structure (6) being in the form of a column being arranged on the afterbody (222)；The foil gauge (3) being arranged on the root (221)；The bridge circuit and amplification circuit module (4) being installed on the tablet (2), the electric bridge electricity Road is electrically connected with the foil gauge (3) with amplification circuit module (4)；The signal acquisition module (5) being installed on the tablet (2), the signal acquisition module (5) It is electrically connected with the bridge circuit and amplification circuit module (4)；And the bearing plate (8) on the pressure transmission structure (6) is arranged at, for accepting stannum plaster scribing knife (9) pressure applied.
- 2. the stannum plaster scribing knife pressure test device according to claim 1 based on foil gauge, its feature It is, the tablet (2) has second through hole (21) of four symmetric arrays and four are in Strip and the cantilever beam (22) for being respectively contained in four second through holes (21) correspondingly, institute State cantilever beam (22) elongatedness direction consistency of thickness.
- 3. the stannum plaster scribing knife pressure test device according to claim 2 based on foil gauge, its feature It is, including with the support platform (1) in tabular supporting plate (11), tablet (2) water Smooth to be put in the supporting plate (11), the middle part of the supporting plate (11), which is provided with, runs through the supporting plate (11) first through hole (111), the first through hole (111) is with second through hole (21) same Orthographic projection on one horizontal plane has overlapping region, orthographic projection of the first through hole (111) in horizontal plane Cover orthographic projection of the cantilever beam (22) in same level.
- 4. the stannum plaster scribing knife pressure test device according to claim 2 based on foil gauge, its feature It is, four pressure transmission structures (6) are respectively arranged at four afterbodys (222) correspondingly, The height of the pressure transmission structure (6) is more than the bridge circuit and amplification circuit module (4) and signal The height of acquisition module (5).
- 5. the stannum plaster scribing knife pressure test device according to claim 1 based on foil gauge, its feature It is, the pressure transmission structure (6) includes outer sleeve (61), inner sleeve (63) and ball (62), The inner sleeve (63) is opening up to be supported in the afterbody (222), and the ball (62) horizontal can be rolled The inner sleeve (63) is contained in dynamicly, and the outer sleeve (61) is opening down to be contained in the inner sleeve And the support bearing plate (8) (63).
- 6. the stannum plaster scribing knife pressure test device according to claim 1 based on foil gauge, its feature It is, two first baffles being oppositely arranged is provided between the bearing plate (8) and the tablet (2) (71) and two second baffles (72) being oppositely arranged, first baffle (71) length are more than described The height of second baffle (72), the first baffle (71) and second baffle (72) is respectively less than the pressure The height of power transferring structure (6), two first baffles (71), two second baffles (72) An accommodation space, the foil gauge (3), bridge circuit and amplification electricity are surrounded with the tablet (2) Road module (4), pressure transmission structure (6) and signal acquisition module (5) are contained in the accommodation space, Two third baffles (73) are individually fixed in the lower section of the opposite sides edge of the bearing plate (8), two The third baffle (73) is fitted vertically in the bearing plate (8) and positioned at the outer of the accommodation space Side.
- 7. the stannum plaster scribing knife pressure test device according to claim 6 based on foil gauge, its feature It is, the support platform (1) has four flat column support blocks (12) respectively from the supporting plate (11) Four vertex extend to be formed straight down, the support block (12) have connection and perpendicular to the branch Two side walls (121) of fagging (11), two side walls (121) of connection bottom wall (122) and from The bottom wall (122) towards away from the supporting plate (11) the horizontal-extending formation in direction installing plate (123), The installing plate (123) is parallel to the supporting plate (11), and the upper surface of the installing plate (123) Less than the bottom surface of the third baffle (73).
- A kind of 8. stannum plaster scribing knife method for testing pressure based on foil gauge, it is characterised in that including：Length direction of the stannum plaster scribing knife (9) along cantilever beam (22) moves horizontally；Bearing plate (8) bears the pressure of the stannum plaster scribing knife (9) and passed by pressure transmission structure (6) It is delivered to the afterbody (222) of the cantilever beam (22)；The cantilever beam (22) produces corresponding flexural deformation；The foil gauge (3) of cantilever beam (22) root (221) senses the cantilever beam (22) and produced Deflection and produce corresponding resistance variations；The resistance variations of the foil gauge (3) are through bridge circuit and amplification circuit module (4) conversion output electricity Press clock signal；After signal acquisition module (5) gathers the voltage clock signal and exports corresponding data signal power supply brain Processing；The computer draws the dynamic time sequence curve of the foil gauge (3) according to the data signal.
- 9. a kind of stannum plaster scribing knife method for testing pressure based on foil gauge according to claim 8, its It is characterised by, including：The stannum plaster scribing knife (9) is drawn according to the dynamic time sequence curve of the foil gauge (3) Translational speed curve.
- 10. a kind of stannum plaster scribing knife method for testing pressure based on foil gauge according to claim 8, its feature It is, including：The tin cream is judged according to the dynamic time sequence curve of the foil gauge (3) of diverse location Whether scraper (9) balances in moving process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610485827.5A CN107543638B (en) | 2016-06-28 | 2016-06-28 | Solder paste scraper pressure testing device based on strain gauge and detection method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN111896391A (en) * | 2020-08-10 | 2020-11-06 | 西安电子科技大学 | Method for measuring elastic modulus of solder in reflow soldering process based on difference method |
| CN113176401A (en) * | 2021-01-15 | 2021-07-27 | 北京中科生仪科技有限公司 | Substrate for biochip |
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