CN109991164A - A kind of coating binding force double lever measuring device and its measurement method - Google Patents
A kind of coating binding force double lever measuring device and its measurement method Download PDFInfo
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- CN109991164A CN109991164A CN201910329128.5A CN201910329128A CN109991164A CN 109991164 A CN109991164 A CN 109991164A CN 201910329128 A CN201910329128 A CN 201910329128A CN 109991164 A CN109991164 A CN 109991164A
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Abstract
The invention discloses a kind of coating binding force double lever measuring device and its measurement methods, including bracket, the first lever mechanism and the second lever mechanism；First lever mechanism includes the first screw rod and crossbeam, and the first support is connected on crossbeam, and the side of the first screw rod is equipped with starting mark and rider, and the first screw rod other side is equipped with the first pull rod；Second lever mechanism includes the second lever and the second pull rod, and fixing seat is vertically equipped on the second lever, and the lower end of fixing seat is equipped with probe, and the lower section of probe is equipped with horizontal mobile mechanism.The present invention provides linearly increasing load to probe by double-lever system, and by probe stroke until coating slight crack occurs and exposes matrix, then observes the position of coating slight crack appearance, determines that its corresponding load can measure interface binding power；Structure is simple simultaneously, and cost is lower；Operating process is simple when measurement, and conducive to the operation of general staff, and bandwagon effect is obvious.
Description
Technical field
The present invention relates to coating binding force field of measuring technique, specially a kind of coating binding force double lever measuring device and
Method.
Background technique
The service life of coating material from the whether good of the interface cohesion for being largely determined by coating and matrix, this
Need to carry out the mechanical property of coating and basal body interface quantitatively characterizing, but due to the diversity of coating kind and technology of preparing,
So far unified characterization parameter and test method are not formed still.In order to measure the interface bond strength of coating and matrix, commonly use
Measurement method have stretching, shearing, bending, scratch, indentation and dynamic test the methods of.
Pulling method is divided to two kinds, i.e. " cross directional stretch method " and " stretched vertically method ".Cross directional stretch method is exactly only to draw the side of matrix
Method, the cracking feature of coating itself is utilized to calculate shear strength in it, and the parameter of measurement is relatively more and this method is only suitable for
Measure brittle diaphragm coating.Stretched vertically method is to be bonded in coating surface with adhesive (such as epoxy resin) to facilitate application
On the object of load, then apply tensile load in the side of the object.The shortcoming of this method is in the event of glue
The adhesive strength of stick is less than the interface tension strength of coating and matrix, will lead to the failure of an experiment, it is impossible to be used in interface cohesion
The high coating measurement of power.
Shearing method is to be partially disposed in cylinder specimen in fixed sleeve without coating to apply load, protrusion it is band coating
Part will be cut away under the action of sleeve load.This method can be difficult to be sheared by sleeve for shallow layer due to coating
To and can not implement.In addition sample must be prepared into radius close to the cylinder of sleeve, this usually prepares laboratory
Sheet specimens are obviously not suitable for, and stress existing for the interface of close coating free boundary concentrates also influence measurement.
Bending method measures the interfacial combined function of coating and basis material using Flexural cantilever model, and uses acoustic emission
To judge whether interface cracks.The shortcoming of this method is that the pressure head of the loading end in load is easy to happen sliding, in this way
It is easy for this signal to be mistakenly considered the acoustic emission signal of Interface Cracking, which must estimate magnitude of load in advance to determine the several of test specimen
What size.In addition this method is suitable only for thicker coating, and for more crisp coating, may be when fixed with regard to embrittlement
And it can not test.
The position of plunging press head is divided into: coating surface plunging, side matrix plunging and interface plunging.It is this
Method is suitable for weak binding interface, and by optical microscopy, acoustic emission device judges Interface Cracking.This method shortcoming is
It needs that finite element model is combined to be analyzed during the experiment, this not only complicates the issue, but also result has very big mistake
Difference.And interface plunging is difficult to make the center of pressure head just to control on interface, experiment is difficult to carry out.
Scarification is the method for using very extensive a kind of characterization coating and basis material interfacial combined function at present.It should
Method is by sample plane perpendicular to probe axis movement, and probe is contacted with sample under the action of normal load, transported by sample
The raw delineation of movable property, load linear increment, system detect automatically and record the load in experimentation, depth, stroke distance, friction
The data such as power, coefficient of friction, acoustic emission signal.Shown as when film is broken or comes off in scratch test scratch depth,
The mutation of frictional force and acoustic emission signal, this state point of mutation are critical point, and corresponding load is critical load, are faced
Boundary's load can be used as the important quantizating index of evaluation film layer and substrate combinating strength, and similarity condition lower critical load is bigger, shows
Film-substrate cohesion is bigger, and film layer adhesion strength is better.
The scratching instrument that scarification uses at present generally uses electromagnetic force to load, knot of this method in measurement film and matrix
Resultant force has the following problems: (1) load that electromagnetism load applies is limited, for the thicker and high coating sample of bond strength as burnt
Erosion resisting coating, ceramic glaze, metal thermal spraying sample are difficult to detect.(2) general scratching instrument can only detect that coating is relatively thin and surface
The binding force of the lower sample of roughness.And due in most cases, the thin sample of coating and coating and basal body interface are unknown
Aobvious sample, coating failure are the processes of a gradual change, and the appearance such as scratch depth, frictional force, acoustic emission signal are mutated very unknown
It is aobvious.And the sample that surface roughness is high, these jump signals occur not can determine which signal corresponds to coating failure too much.
Although can accurately determine coating failure point using micro- sem observation, scratch depth, frictional force, acoustic emission system detect work
Meaning is just lost to test.Therefore, general scratching instrument can not be effectively to the higher surface covering of thicker, roughness and matrix
Between binding force tested.(3) general scratching instrument needs electromagnetism loading system, sensor and equipment control software, cost
Higher, operating process is complicated, and bandwagon effect is unobvious, is unfavorable for general staff's operation.
Summary of the invention
In view of the above shortcomings of the prior art, the technical problem to be solved by the present invention is how to provide a kind of structure
Simply, cost is relatively low, and sample is adaptable, the apparent coating binding force double lever measuring device of bandwagon effect.
Further, the present invention also provides the measurement methods that coating binding force double lever is carried out using above-mentioned apparatus, solve existing
There is the problems such as measurement method operating process is complicated, and bandwagon effect is unobvious.
In order to solve the above-mentioned technical problem, present invention employs the following technical solutions:
A kind of coating binding force double lever measuring device, including bracket, the first lever mechanism and the second lever mechanism；It is described
First lever mechanism includes the first screw rod and above first screw rod and the crossbeam parallel with the first screw rod, the crossbeam
Both ends be connected by fixed plate with first screw rod, the first support is connected at the outer blade of the crossbeam, it is described
The lower end of first support is fixed on the bracket, and first screw rod passes through first support, and the of the first support side
One screw rod is equipped with starting mark and engages the rider to form screw pair, the first screw rod of the first support other side with the first screw rod
Equipped with the first pull rod, the upper end of the rider and first pull rod is suspended on crossbeam, is also connected on first screw rod
It is connected to the first rotating mechanism for being able to drive the first screw rod rotation；Second lever mechanism includes the second lever and fixation
The second pull rod in the bracket lower end, first lever mechanism is connected by the first pull rod with second lever, described
First pull rod both ends are respectively equipped with the first blade support and the second blade support, the knife of the first blade support and the crossbeam
Sword is connected, and the second blade support is connected with the blade of second lever；Second lever and the second pull rod are cut with scissors
It connecing and can be rotated freely around hinge joint, the other side that second lever is connect with first pull rod is vertically equipped with fixing seat,
The lower end of the fixing seat is equipped with probe, is additionally provided with below the probe and moves horizontally machine for place sample to be tested
Structure.
Preferably, the side that first pull rod is connected on the crossbeam is additionally provided with balanced code, first pull rod to institute
State distance of the distance less than the balanced code to first support of the first support.
In this way, using the device sample to be tested is tested when, by rider adjust to the starting point on the first screw rod
Mark position, then adjustment code make the first lever mechanism and the second lever mechanism be in equilibrium state, so as to adjust
Initial forces of the probe on sample to be tested surface go to zero.
Preferably, the horizontal mobile mechanism include the second screw rod, the second rotating mechanism being connect with the second screw rod and with
Second screw rod forms the translation stage of screw pair, and the upper end of the translation stage is equipped with the fixture of fixed sample to be tested.
In this way, driving the rotation of the second screw rod by the second rotating mechanism after sample to be tested is fixed on translation stage with fixture
Turn, while translation stage will move horizontally on the second screw rod with sample to be tested.
Preferably, first rotating mechanism is servo motor, and second rotating mechanism is stepper motor.
Preferably, the length of first screw rod is greater than the length of second lever.
In this way, the length of the first screw rod is arranged it is longer so that rider has a sufficiently long moving distance, then first
Torque that rider gravity on bar generates after double-lever system transmits, probe be applied to sample to be tested surface vertically downward
Active force is bigger, can preferably meet the test of high-bond coating sample.
Further, the present invention also provides it is a kind of using above-mentioned apparatus measurement coating binding force method, specifically include with
Lower step:
Sample to be tested is fixed on the translation stage of horizontal mobile mechanism by step 1)；
The position that step 2) adjusts horizontal mobile mechanism moves to rider so that sample to be tested is located at the underface of probe
The position of starting mark is set on the first screw rod, and it is flat that adjustment code is in the first lever mechanism and the second lever mechanism
Weighing apparatus state；
Step 3) starts the first rotating mechanism and horizontal mobile mechanism simultaneously, so that rider is on the first screw rod with speed V1
While mobile to the direction far from the first support, horizontal mobile mechanism is with sample to be tested with speed V2Mobile, rider is the
While movement on one screw rod, the horizontal distance B of rider to the first support becomes larger linearly over time, i.e. the gravity Q of rider is
The torque M generated on one lever mechanism linearly becomes larger, and torque M is after the first lever mechanism and the transmitting of the second lever mechanism, probe
Linearly become larger in the active force P vertically downward that sample to be tested surface applies；
Step 4) closes the first rotating mechanism and level when horizontal mobile mechanism drives sample to be tested to move a certain distance
Sample to be tested is removed from horizontal mobile mechanism by mobile mechanism, observes the scratch on sample to be tested, measures the painting on sample to be tested
Scratch length S when layer is scratched；
Step 5) is according to lever principle, and the gravity Q and probe that rider applies on the first lever mechanism are to sample to be tested table
There are the relationships of formula (1) between the active force P vertically downward that face applies:
P·L1=FL2；FA=QB (1)
Then
If the scratch length when coating on sample to be tested is scratched is S, rider is walked on the first screw rod at this time
Distance B are as follows:
Bringing formula (3) into formula (2) can be calculated what probe when the coating of sample to be tested is scratched applied in specimen surface
Active force P vertically downward, by each arm of force of the first lever mechanism, long, the second lever mechanism each arm of force is long, gravity of rider,
The calculated result of these known parameters of rider and the rate travel of horizontal mobile mechanism is demarcated as Proportional coefficient K in advance, visits in this way
Scratch length S of the needle when the active force P vertically downward that sample to be tested surface applies only is scratched to coating is directly proportional:
In formula: L1For the probe vertical axis in the second lever mechanism to the second lever and the hinged dot center of the second pull rod it
Between horizontal distance；L2For the tie point of the second lever mechanism and the first pull rod to the second lever and the hinged dot center of the second pull rod
Between horizontal distance, A is the tie point of the first screw rod and the first pull rod to the horizontal distance between the first support center, and F is
Active force on first pull rod, Q are the gravity of rider.
Measurement method of the invention utilizes the action principle of lever, by the synergy of dual lever mechanism, by rider
The torque that gravity Q is generated passes to probe, the active force P straight down that probe applies in sample surfaces to be tested.Carry out
During measurement, the scratch length S when coating on sample to be tested is scratched need to be only measured, so that it may coating and base be calculated
The interface binding power of body.
Preferably, the probe vertical axis in the second lever mechanism is between the second lever and the hinged dot center of the second pull rod
Horizontal distance L1Less than the tie point of the second lever and the first pull rod between the second lever and the hinged dot center of the second pull rod
Horizontal distance L2, the horizontal distance of rider to the first support center is greater than the tie point of the first screw rod and the first pull rod to first
Horizontal distance A between support center.
In this way, the power arm of the first lever mechanism and the second lever mechanism is both greater than resistance arm according to leverage principle,
Active force is set to generate two-stage amplification by torque transmitting, probe is applied to the active force vertically downward on sample to be tested will
Much larger than the gravity of rider, thus double-lever system can better meet the survey of coating roughness height and the big sample of bond strength
Examination demand.
Preferably, in step 4), using the scratch on micro- sem observation sample to be tested, and the coating on sample to be tested is measured
Scratch length S when being scratched.
In this way, without measuring the extraneous datas such as depth, frictional force, sound emission, being shown using microscope direct observing scratch
Effect is good, and coating failure critical point accuracy of judgement is reliable.
Compared with prior art, the present invention has the advantage that
1, measuring device of the invention design rationally, is skillfully constructed, and is provided by dual lever mechanism probe linearly increasing
Active force, make coating using probe stroke and slight crack occur in basal body interface, the position occurred by observing interface slight crack, just
It can determine the interface binding power of its matrix and coating；Scratch length when only needing to measure coating interface rupture in test, just
Probe when sample to be tested coating and basal body interface are scratched can directly be calculated and be applied to the active force on sample to be tested, i.e.,
Binding force between coating and matrix.
2, this measuring device is compared with traditional scratching instrument, can it is effectively thicker to surface covering, roughness is higher, combines
The big sample of power carries out the test of interface binding power；It is traditional with use electromagnetism loading system, sensor and equipment control software etc.
Device is compared, and each structure of the present invention is more succinct, and cost is lower.
3, the measuring device load range used in the present invention is big, and Maximal loading is high, and maximal force is up to 5kN, load
5~50N/s of speed is adjustable, loading accuracy 1~5%, and sample translates maximum speed 50mm/s, range 100mm, therefore coating
Binding force measured value wider range.Simultaneously because loading force is big, translation stage moving distance is big and adjustable, to the adaptability of sample
By force, it can detecte the binding force for applying the big sample of thickness, bond strength big, rough surface, size.
4, measurement method of the invention utilizes leverage principle, by the synergy of dual lever mechanism, by rider
Gravity Q is converted into the active force P vertically downward that probe applies on sample to be tested surface, adds moreover, test need to only start simultaneously
It carries and sample is mobile, entire simple testing process is easy, is conducive to the operation of general staff.
5, this test method uses microscope direct observing scratch length, without measuring the nothings such as depth, frictional force, sound emission
Data are closed, are calculated simply, bandwagon effect is good, and coating failure critical point accuracy of judgement is reliable.
Detailed description of the invention
In order to keep the purposes, technical schemes and advantages of invention clearer, the present invention is made into one below in conjunction with attached drawing
The detailed description of step, in which:
Fig. 1 is the structural schematic diagram of specific embodiment of the invention coating binding force double lever measuring device；
Fig. 2 is that the action principle of lever mechanism in specific embodiment of the invention coating binding force double lever measuring device is shown
It is intended to.
Description of symbols: balanced code 1, fixed plate 2, the first pull rod 3, the first support 4, the first screw rod 5, rider 6, crossbeam
7, bracket 8, electric-controlled box 9, fixture 10, translation stage 11, the second screw rod 12, stepper motor 13, probe 14, fixing seat 15, second are drawn
Bar 16, the second lever 17, servo motor 18.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawing.
As shown in Figure 1 and Figure 2, a kind of coating binding force double lever measuring device, including bracket 8, the first Lever machine
Structure and the second lever mechanism；First lever mechanism includes the first screw rod 5 and is located above the first screw rod 5 and flat with the first screw rod 5
The both ends of capable crossbeam 7, crossbeam 7 are connected by fixed plate 2 with the first screw rod 5, are connected with first at the outer blade of crossbeam 7
The lower end of support 4, the first support 4 is fixed on bracket 8, the first screw rod 5 pass through the first support 4, the first of 4 side of the first support
Screw rod 5 is equipped with starting mark and engages the rider 6 to form screw pair with the first screw rod 5, and first of 4 other side of the first support
Bar 5 is equipped with the first pull rod 3, and the upper end of rider 6 and the first pull rod 3 is suspended on crossbeam 7, is also connected on the first screw rod 5
It is able to drive the first rotating mechanism of the first screw rod 5 rotation；Second lever mechanism includes the second lever 17 and is fixed under bracket 8
Second pull rod 16 at end, the first lever mechanism are connected by the first pull rod 3 with the second lever 17, and 3 both ends of the first pull rod are set respectively
There are the first blade support and the second blade support, the first blade support is connected with the blade of crossbeam 7, the second blade support and
The blade of two levers 17 is connected；Second lever 17 is hinged with the second pull rod 16 and can rotate freely around hinge joint, the second lever
17 other sides connecting with the first pull rod 3 are vertically equipped with fixing seat 15, and the lower end of fixing seat 15 is equipped with probe 14, probe 14
Lower section is additionally provided with the horizontal mobile mechanism for placing sample to be tested.
In the present embodiment, the side that the first pull rod 3 is connected on crossbeam 7 is additionally provided with balanced code 1, the first pull rod 3 to the first
The distance of support 4 is less than the distance of the 1 to the first support of balanced code 4.
In this way, using the device sample to be tested is tested when, by rider adjust to the starting point on the first screw rod
Mark position, then adjustment code make the first lever mechanism and the second lever mechanism be in equilibrium state, so as to adjust
Initial forces of the probe on sample to be tested surface go to zero.
In the present embodiment, horizontal mobile mechanism include the second screw rod 12, the second whirler for being connect with the second screw rod 12
Structure and the translation stage 11 that screw pair is formed with the second screw rod 12, the upper end of translation stage 11 is equipped with the fixture of fixed sample to be tested
10。
In this way, driving the rotation of the second screw rod by the second rotating mechanism after sample to be tested is fixed on translation stage with fixture
Turn, while translation stage will move horizontally on the second screw rod with sample to be tested.
In the present embodiment, the first rotating mechanism is servo motor 18, and the second rotating mechanism is stepper motor 13.
In the present embodiment, the length of the first screw rod 5 is greater than the length of the second lever 17.
In this way, the length of the first screw rod is arranged it is longer so that rider has a sufficiently long moving distance, then first
Torque that rider gravity on bar generates after double-lever system transmits, probe be applied to sample to be tested surface vertically downward
Active force is bigger, can preferably meet the test of high-bond coating sample.
It further include electric-controlled box 9, electric-controlled box 9 is for simultaneously carrying out stepper motor 13 and servo motor 18 in the present embodiment
Control.
When being measured using the device, sample to be tested fixture 10 is fixed on the translation stage 11 of horizontal mobile mechanism, is adjusted
It is moved on 6 to the first screw rod 5 of rider so that sample to be tested is located at the underface of probe 14 position of horizontal mobile mechanism
Then initial position and adjustment code 1 press electricity so that the first lever mechanism and the second lever mechanism are in equilibrium state
The start key for controlling box 9 starts servo motor 18 and stepper motor 13 simultaneously, so that rider 6 is on the first screw rod 5 with speed V1To
While direction far from the first support 4 is mobile, horizontal mobile mechanism is with sample to be tested 10 with speed V2Mobile, rider 6 exists
While movement on first screw rod 5, the horizontal distance B of the 6 to the first support of rider 4 becomes larger linearly over time, i.e. the gravity of rider 5
The torque that Q is generated on the first lever mechanism is linearly increasing, after the first lever mechanism and the second lever mechanism, probe 14 to
The active force P vertically downward that test specimens surface applies linearly becomes larger；When horizontal mobile mechanism is mobile certain with sample to be tested
Apart from when, simultaneously close off servo motor 18 and stepper motor 13 after pressing 9 stop key of electric-controlled box, removed from horizontal mobile mechanism
Sample to be tested 10 observes the scratch on sample to be tested, measures the scratch length S when coating on sample to be tested is scratched；According to
The parameters such as the speed of the arm of force geometrical length of the double-lever system of device, rider weight and motor operation determine binding force ratio system
Number K, the binding force of matrix and coating surface is directly calculated with the scratch length S that measurement obtains.
A kind of coating binding force double lever measurement method, using above-mentioned apparatus, comprising the following steps:
Sample to be tested is fixed on the translation stage 11 of horizontal mobile mechanism by step 1)；
Rider 6 is moved so that sample to be tested is located at the underface of probe 14 in the position that step 2) adjusts horizontal mobile mechanism
The position of starting mark is set on to the first screw rod 5, and adjustment code 1 locates the first lever mechanism and the second lever mechanism
In equilibrium state；
Step 3) starts the first rotating mechanism and horizontal mobile mechanism simultaneously, so that rider 6 is on the first screw rod 5 with speed
V1While mobile to the direction far from the first support 4, horizontal mobile mechanism is with sample to be tested with speed V2Mobile, rider 6 exists
While movement on first screw rod 5, the horizontal distance B of the 6 to the first support of rider 4 becomes larger linearly over time, i.e. the gravity of rider 6
The torque M that Q is generated on the first lever mechanism linearly becomes larger, torque M through the first lever mechanism and the second lever mechanism transmitting after,
Probe 14 linearly becomes larger in the active force P vertically downward that sample to be tested surface applies；
Step 4) closes the first rotating mechanism and level when horizontal mobile mechanism drives sample to be tested to move a certain distance
Sample to be tested is removed from horizontal mobile mechanism by mobile mechanism, observes the scratch on sample to be tested, measures the painting on sample to be tested
Scratch length S when layer is scratched；
Step 5) is according to lever principle, and the gravity Q and probe 14 that rider 6 applies on the first lever mechanism are to sample to be tested
There are the relationships of formula (1) between the active force P vertically downward that surface applies:
P·L1=FL2；FA=QB (1)
Then
If the scratch length when coating on sample to be tested is scratched is S, rider is walked on the first screw rod at this time
Distance B are as follows:
Bringing formula (3) into formula (2) can be calculated what probe when the coating of sample to be tested is scratched applied in specimen surface
Active force P vertically downward, further, the weight of long, the second lever mechanism arm of force length, rider by the arm of force of the first lever mechanism
Power, the calculated result of rider and the rate travel of horizontal mobile mechanism these known parameters are demarcated as Proportional coefficient K in advance, in this way
Scratch length S of the probe when the active force P vertically downward that sample to be tested surface applies only is scratched to coating is directly proportional:
In formula: L1For 14 vertical axis of probe in the second lever mechanism to 16 hinge joint of the second lever 17 and the second pull rod
Horizontal distance between center；L2For the tie point of the second lever mechanism and the first pull rod 3 to the second lever 17 and the second pull rod
Horizontal distance between 16 hinged dot center, A are the tie point of the first screw rod 5 and the first pull rod 3 between 4 center of the first support
Horizontal distance, F be the first pull rod 3 on active force, Q be rider 6 gravity.
In the present embodiment, 14 vertical axis of probe in the second lever mechanism is cut with scissors to the second lever 17 and the second pull rod 16
Horizontal distance L between contact center1Less than the tie point of the second lever 17 and the first pull rod 16 to the second lever 17 and second
Horizontal distance L between the hinged dot center of pull rod 162, the horizontal distance at 4 center of the 6 to the first support of rider is greater than the first screw rod 5
With the tie point of the first pull rod 3 to the horizontal distance A between 4 center of the first support.In the present embodiment, rider 6 to the first
Seat 4 centers horizontal distance can be moved into much larger than the tie point of the first screw rod 5 and the first pull rod 3 to 4 center of the first support it
Between horizontal distance A.
In this way, the power arm of the first lever mechanism and the second lever mechanism is both greater than resistance arm, it is former according to the effect of lever
Reason, the torque that the gravity of rider 6 generates will be formed after the transmitting of the first lever mechanism on the first pull rod 3 is greater than 6 gravity of rider
Active force；Meanwhile the torque that the first active force on pull rod 3 generates will produce at probe 14 after the transmitting of the second lever mechanism
Raw bigger active force, therefore the two-stage amplification power through the first lever mechanism and the second lever mechanism, are applied to through probe 14
Active force vertically downward on sample to be tested will be much larger than the gravity of rider 6, so as to better meet coating roughness height
The testing requirement of big sample with binding force.
Measurement method of the invention utilizes the action principle of lever, by the synergy of dual lever mechanism, by rider
The torque that gravity Q is generated passes to probe, and probe applies active force P straight down in sample surfaces to be tested.It is being surveyed
During amount, the scratch length S when coating on sample to be tested is scratched need to be only measured, so that it may coating and matrix be calculated
Interface binding power.
In the present embodiment, it in step 4), using the scratch on micro- sem observation sample to be tested, and measures on sample to be tested
Scratch length S of coating when being scratched.
In this way, without measuring the extraneous datas such as depth, frictional force, sound emission, being shown using microscope direct observing scratch
Effect is good, and coating failure critical point accuracy of judgement is reliable.
The measuring device load range used in the present invention is big, and Maximal loading is high, and maximal force is up to 5kN, load speed
It is adjustable to spend 5~50N/s, loading accuracy 1~5%, sample translates maximum speed 50mm/s, range 100mm, therefore coating knot
Resultant force measured value wider range.Simultaneously because loading force is big, 11 moving distance of translation stage is big and adjustable, to the adaptability of sample
By force, it can detecte the binding force of the big sample of thick coating, bond strength big, rough surface, size.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to excellent
Embodiment is selected to describe the invention in detail, those skilled in the art should understand that, it can be to of the invention
Technical solution is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered
In scope of the presently claimed invention.
Claims (8)
1. a kind of coating binding force double lever measuring device, which is characterized in that including bracket, the first lever mechanism and the second lever
Mechanism；First lever mechanism includes the first screw rod and above first screw rod and the cross parallel with the first screw rod
The both ends of beam, the crossbeam are connected by fixed plate with first screw rod, and is connected at the outer blade of the crossbeam
One support, first support lower end are fixed on the bracket, first screw rod pass through first support, described first
First screw rod of support side is equipped with starting mark and engages the rider to form screw pair with the first screw rod, and the first support is another
First screw rod of side is equipped with the first pull rod, and the upper end of the rider and first pull rod is suspended on crossbeam, and described the
The first rotating mechanism for being able to drive the first screw rod rotation is also connected on one screw rod；Second lever mechanism includes the
Two levers and the second pull rod for being fixed on the bracket lower end, first lever mechanism pass through the first pull rod and second thick stick
Bar is connected, and first pull rod both ends are respectively equipped with the first blade support and the second blade support, the first blade support with
The blade of the crossbeam is connected, and the second blade support is connected with the blade of second lever；Second lever
Hinged with the second pull rod and can rotate freely around hinge joint, the other side that second lever is connect with first pull rod is vertical
Equipped with fixing seat, the lower end of the fixing seat is equipped with probe, is additionally provided with below the probe for placing sample to be tested
Horizontal mobile mechanism.
2. coating binding force double lever measuring device as described in claim 1, which is characterized in that on the crossbeam described in connection
The side of first pull rod is additionally provided with balanced code, and the distance of first pull rod to first support is less than the balanced code to institute
State the distance of the first support.
3. coating binding force double lever measuring device as described in claim 1, which is characterized in that the horizontal mobile mechanism packet
Include the second screw rod, the second rotating mechanism connecting with the second screw rod and the translation stage that screw pair is formed with second screw rod, institute
The upper end for stating translation stage is equipped with the fixture of fixed sample to be tested.
4. coating binding force double lever measuring device as claimed in claim 3, which is characterized in that first rotating mechanism is
Servo motor, second rotating mechanism are stepper motor.
5. coating binding force double lever measuring device as described in claim 1, which is characterized in that the length of first screw rod
Greater than the length of second lever.
6. a kind of coating binding force double lever measurement method, which is characterized in that device as described in claim 1 is used, it is specific to wrap
Include following steps:
Sample to be tested is fixed on the translation stage of horizontal mobile mechanism by step 1)；
Rider is moved to first so that sample to be tested is located at the underface of probe by the position that step 2) adjusts horizontal mobile mechanism
The position of starting mark is set on screw rod, and adjustment code makes the first lever mechanism and the second lever mechanism be in equilibrium-like
State；
Step 3) starts the first rotating mechanism and horizontal mobile mechanism simultaneously, so that rider is on the first screw rod with speed V1Xiang Yuan
While direction from the first support is mobile, horizontal mobile mechanism is with sample to be tested with speed V2Mobile, rider is at first
While movement on bar, the horizontal distance B of rider to the first support becomes larger linearly over time, i.e., the gravity Q of rider is in the first thick stick
The torque M generated on linkage linearly becomes larger, torque M through the first lever mechanism and the second lever mechanism transmitting after, probe to
The active force P vertically downward that test specimens surface applies linearly becomes larger；
Step 4) is closed the first rotating mechanism and is moved horizontally when horizontal mobile mechanism drives sample to be tested to move a certain distance
Sample to be tested is removed from horizontal mobile mechanism by mechanism, observes the scratch on sample to be tested, measures the coating quilt on sample to be tested
Scratch length S when scratching；
For step 5) according to lever principle, the gravity Q and probe that rider applies on the first lever mechanism apply sample to be tested surface
There are the relationships of formula (1) between the active force P vertically downward added:
P·L1=FL2；FA=QB (1)
Then
If the scratch length when coating on sample to be tested is scratched is S, the distance B that rider is walked on the first screw rod at this time
Are as follows:
By formula (3) bring into formula (2) can be calculated when the coating of sample to be tested is scratched probe apply in specimen surface it is vertical
Downward active force P, long, the second lever mechanism each arm of force length, the gravity of rider, rider by each arm of force of the first lever mechanism
And the calculated result of the rate travel of horizontal mobile mechanism these known parameters is demarcated as Proportional coefficient K in advance, such probe exists
Scratch length S when the active force P vertically downward that sample to be tested surface applies only is scratched to coating is directly proportional:
In formula: L1Between the probe vertical axis in the second lever mechanism to the second lever and the hinged dot center of the second pull rod
Horizontal distance；L2It is the tie point of the second lever mechanism and the first pull rod between the second lever and the hinged dot center of the second pull rod
Horizontal distance, A is the tie point of the first screw rod and the first pull rod to the horizontal distance between the first support center, F first
Active force on pull rod, Q are the gravity of rider.
7. coating binding force double lever measurement method as claimed in claim 6, which is characterized in that the spy in the second lever mechanism
Needle vertical axis is to the horizontal distance L between the second lever and the hinged dot center of the second pull rod1It is drawn less than the second lever and first
The tie point of bar is to the horizontal distance L between the second lever and the hinged dot center of the second pull rod2, rider to the first support center
Horizontal distance is greater than the tie point of the first screw rod and the first pull rod to the horizontal distance A between the first support center.
8. coating binding force double lever measurement method as claimed in claim 6, which is characterized in that in the step 4), use
Scratch on micro- sem observation sample to be tested, and measure the scratch length S when coating on sample to be tested is scratched.
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