CN109813513A - A kind of Machine Joint Surfaces dynamic characteristic parameter measuring device and method - Google Patents
A kind of Machine Joint Surfaces dynamic characteristic parameter measuring device and method Download PDFInfo
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- CN109813513A CN109813513A CN201910080947.0A CN201910080947A CN109813513A CN 109813513 A CN109813513 A CN 109813513A CN 201910080947 A CN201910080947 A CN 201910080947A CN 109813513 A CN109813513 A CN 109813513A
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Abstract
The present invention relates to Machine Joint Surfaces dynamic characteristic measuring technical field, a kind of Machine Joint Surfaces dynamic characteristic parameter measuring device and method are provided.The device of the invention is equipped with the feed screw nut combination for penetrating nut seat on pedestal, and the horizontal leading screw for being connected with motor connect with fixing seat at one end, connect in the other end with support base, and nut seat upper end is connected with sliding block, and sliding block is slidably connected on cross slide way；Pedestal is connect with top plate by longitudinally rounded guide rail and longitudinal leadscrew；The vibration excitor by support plate and screw jack support is laid with above top plate central circular groove and circular through hole；Acceleration transducer is laid on pedestal.Method of the invention controls the excited frequency of vibration excitor by computer and signal generator, by adjusting the modes of emplacement of the second sample and acceleration transducer, the forms of motion of sliding block, fixed combinating surface or the normal direction or tangential dynamic-characteristic parameters of faying face can be relatively moved under selective measurement different condition, and improve measurement accuracy.
Description
Technical field
The present invention relates to Machine Joint Surfaces dynamic characteristic measuring technical fields, more particularly to a kind of Machine Joint Surfaces dynamic
Characterisitic parameter measuring device and method.
Background technique
What machinery was often made of many components, connection, Machinery Ministry are matched by different modes between each part
The interface connected between part is referred to as " Machine Joint Surfaces ".The presence of Machine Joint Surfaces causes mechanical local stiffness to reduce, makes machine
Tool is not integrally a non-individual body, is had an important influence to the dynamic performance of entire mechanical structure, according to statistics, more than 60%
Mechanical oscillation problem derive from Machine Joint Surfaces.Machine Joint Surfaces are considered as flexiblesystem in Contact Dynamics, use contact
Two important parameters of rigidity and contact damping characterize the kinetic characteristics of Machine Joint Surfaces, the survey of contact stiffness and contact damping
It measures particularly important to the kinetic characteristics of research Machine Joint Surfaces.Currently, the dynamic characteristic due to Machine Joint Surfaces is extremely complex,
There is also many deficiencies for recognition methods, influence factor and application technology of Machine Joint Surfaces dynamic characteristic parameter etc.: (1) due to not having
There is a calculation formula of reliable machine faying face exposure parameter, and the resolution ratio plus laboratory apparatus, sensitivity and human factor
It influences, either still experimentally using theoretical method, is all unable to get more accurately Machine Joint Surfaces parameter value；
(2) due to lacking corresponding evaluation criterion, and calculation method used in Machine Joint Surfaces exposure parameter and experiment dress are obtained
Difference is set, obtained Machine Joint Surfaces exposure parameter disunity；(3) reality different, acquired due to the structure of Machine Joint Surfaces
Testing data can be only applied on some or certain a kind of faying face, and the Machine Joint Surfaces exposure parameter versatility caused compares
Difference.
As it can be seen that there are accuracy of identification is low, validity is low, the difficulty of poor universality for the measurement of Current mechanical faying face exposure parameter
Topic, to need reliable Machine Joint Surfaces dynamic characteristic parameter measuring device and method.However existing Machine Joint Surfaces are dynamic
Step response parameter measuring apparatus and method generally use many-degrees of freedom system, substantially increase difficulty of test, are difficult accurately
Obtain the dynamic characteristic test signal of Machine Joint Surfaces, and the shape of existing Machine Joint Surfaces dynamic characteristic parameter measuring device
Formula is more single, can only measure the normal direction exposure parameter of Machine Joint Surfaces merely.
Summary of the invention
In view of the problems of the existing technology, the present invention provide a kind of Machine Joint Surfaces dynamic characteristic parameter measuring device and
Method, can be on the basis of keeping single-degree-of-freedom, alternative measurement fixed combinating surface or the normal direction for relatively moving faying face
Or tangential dynamic-characteristic parameters, improve the precision, validity and versatility of measurement result.
The technical solution of the present invention is as follows:
A kind of Machine Joint Surfaces dynamic characteristic parameter measuring device, it is characterised in that: including pedestal, top plate；The pedestal
Middle part offers the first groove above, nut seat is equipped in first groove, first groove is in nut seat two sides point
Not She You fixing seat and support base, the fixing seat is bolted with pedestal with support base；First groove is upper
Side is additionally provided with feed screw nut combination, and feed screw nut combination includes horizontal leading screw and nut, the horizontal leading screw at one end with
Fixing seat connection, the horizontal leading screw are connect in the other end with support base, and the horizontal leading screw passes through nut, the spiral shell at middle part
Mother penetrates in nut seat at one end；The horizontal leading screw is connected with motor；
The pedestal is symmetrical arranged two cross slide ways for being parallel to horizontal leading screw, the nut in the first groove two sides
The sliding block perpendicular to cross slide way is bolted in seat above, and the sliding block is symmetrically opened up in lower section two sides and is parallel to
Two the second grooves of cross slide way, the sliding block is slidably connected on two cross slide ways by two the second grooves, described
Middle part offers one group of first bolt hole in crossing distribution to sliding block above；
The pedestal is plugged with symmetrically arranged two groups of longitudinally rounded guide rails on the outside of two cross slide ways and two vertical
To lead screw, every group of longitudinally rounded guide rail includes two longitudinally rounded guide rails, and the longitudinal leadscrew is located at one group of longitudinally rounded guide rail
In two longitudinally rounded guide rails between；The longitudinally rounded guide rail and longitudinal leadscrew are pierced by top plate, the longitudinal direction above
Circular guideway is fixed with below top plate by guide rail fixing clamp, and the longitudinal leadscrew is connected through a screw thread with top plate；
The top plate offers circular groove at middle part, and the circular groove offers circular through hole, the circle at middle part
Connected in star is distributed along the circumference with multiple second bolts hole in bottom；The top plate is laid with vibration excitor above middle part, described to swash
The device that shakes includes exciter body, and the exciter body is equipped with longitudinal exciting rod and lateral vibration excitor shaft, described to swash
Bar lower section shake equipped with vibration excitor probe, the exciter body is connected with exciting shell by vibration excitor shaft；The vibration excitor sheet
The diameter of body is less than the diameter of circular groove, and the diameter of the exciting rod is less than the diameter of circular through hole；The exciting shell and swash
It is equipped with support plate between the upper end of vibration device ontology, the support plate is bolted with exciting shell, and the support plate is in lower section
Two sides are symmetrically arranged with two screw jack, and the screw jack is placed on top plate；
The vibration excitor is electrically connected with signal generator, and the signal generator is electrically connected with computer；On the pedestal
It is laid with acceleration transducer, the acceleration transducer is connected with signal receiver, and the signal receiver and calculating are electromechanical
Connection.
The fixing seat is symmetrical arranged in two sides there are two third bolt hole, and the fixing seat and pedestal pass through two bolts
Realize connection；The nut seat is symmetrically arranged with two group of the 4th bolt hole in two sides, and every group of the 4th bolt hole includes two the 4th
Bolt hole, the sliding block is symmetrically arranged with two group of the 5th bolt hole corresponding with two group of the 4th bolt hole position in two sides, described
Sliding block and nut seat are realized by four bolts to be connected；The support base is symmetrically arranged with two group of the 6th bolt hole in two sides, often
The 6th bolt hole of group includes that two the 6th bolts hole, the support base and pedestal are connected by four bolts realizations.
The vibration excitor probe is equipped with pressure sensor in lower section, and the pressure sensor is electrically connected with signal receiver,
The pressure sensor can measure the pressure between vibration excitor probe and the second sample.
It is a kind of to carry out Machine Joint Surfaces dynamic characteristic parameter using above-mentioned Machine Joint Surfaces dynamic characteristic parameter measuring device
The method of measurement, which is characterized in that include the following steps:
Step 1: determination will measure the first sample and the second sample of Machine Joint Surfaces dynamic characteristic parameter, by the first sample
It is placed on sliding block upper center, the first bolt is selected, is screwed into the first bolt after the first bolt to be screwed into the bolt hole of the first sample
Hole is until the first sample is fixedly connected with a slide block；
Step 2: moving sliding block along cross slide way, the vibration excitor probe above center face；
Step 3: the type of the determination Machine Joint Surfaces to be measured: the Machine Joint Surfaces to measurement are fixed combinating surface,
Then follow the steps 3.1；Machine Joint Surfaces to measurement are relative movement faying face, then follow the steps 3.2；
Step 3.1: the second sample being placed on above the first sample, step 4.1 is then executed；
Step 3.2: the second bolt is screwed into after the bolt hole of the second sample that be screwed into the second bolt hole straight by the second bolt of selection
It is fixedly connected to the second sample with top plate lower end, then executes step 4.2；
Step 4:
Step 4.1: adjusting screw jack, move down support plate, vibration excitor is driven to move down, until vibration excitor
Probe stretches out circular through hole, adjusts loose guide rail fixing clamp, is then adjusted in synchronism two longitudinal leadscrews, drives top plate along longitudinal circle
Shape guide rail moves down, and when vibration excitor the second sample of probe contacts, tightens guide rail fixing clamp so that top plate is fixed on longitudinal direction
On circular guideway, step 5.1 is then executed；
Step 4.2: adjusting screw jack, move down support plate, vibration excitor is driven to move down, until vibration excitor
The second sample of probe contacts adjusts loose guide rail fixing clamp, is then adjusted in synchronism two longitudinal leadscrews, drives top plate along longitudinal circle
Shape guide rail moves down, and when second the first sample of sample contacts, tightens guide rail fixing clamp so that top plate is fixed on longitudinal circle
On shape guide rail, step 5.2 is then executed；
Step 5:
Step 5.1: setting the vibration frequency of vibration excitor, the electricity of respective frequencies is sent by computer control signal generator
Signal opens vibration excitor to vibration excitor, is popped one's head in by vibration excitor and applies exciting force to the second sample and the first sample, in exciting force
Under the action of, the second sample is vibrated with the first sample, then executes step 6；
Step 5.2: setting the vibration frequency of vibration excitor, the electricity of respective frequencies is sent by computer control signal generator
Signal opens vibration excitor to vibration excitor, is popped one's head in by vibration excitor and applies exciting force to the second sample and the first sample, in exciting force
Under the action of, the second sample is vibrated with the first sample；Motor is opened, horizontal leading screw rotates driven by the motor, drives
Transversely guide rail is for linear motion for nut and sliding block；
Step 6: acceleration transducer measures the vibration frequency of the second sample and the first sample and sends corresponding
For electric signal to signal receiver, signal receiver sends corresponding electric signal to computer, computer to the electric signal received into
Row analysis and processing, calculate the dynamic characteristic parameter of the Machine Joint Surfaces of the first sample and the second sample, the dynamic characteristic
Parameter includes contact stiffness and contact damping.
First sample includes sample attachment base, and first sample extends outward cylindricality in the middle part of sample attachment base
Joint head, the cylindricality joint head and sample attachment base are integrally formed, and the sample attachment base is in the two sides pair of cylindricality joint head
Claiming setting, there are two the 7th bolts hole, and second sample and the first sample size, structure are all the same；
In the step 1, the first bolt is screwed into after the 7th bolt hole of the first sample and is screwed into the first bolt hole until the
One sample is fixedly connected with a slide block；
In the step 3.1, the cylindricality joint head of the second sample is placed on above the cylindricality joint head of the first sample, it will
Acceleration transducer is placed on pedestal or on the sample attachment base of the first sample or top of the second sample or is pasted onto first
Among the Machine Joint Surfaces of sample and the second sample；
In the step 3.2, the second bolt is screwed into after the 7th bolt hole of the second sample be screwed into the second bolt hole until
Second sample is fixedly connected with top plate lower end, and acceleration transducer is placed on pedestal or the sample attachment base of the first sample
On.
When acceleration transducer is placed on pedestal, in the step 6, acceleration transducer is to the second sample and
The normal vibration frequency of one sample measures, and finally calculates the normal dynamic characteristics parameter of Machine Joint Surfaces；
When acceleration transducer is placed on the sample attachment base of the first sample, in the step 6, acceleration sensing
Device measures the normal direction or tangential vibrations frequency of the second sample and the first sample, finally calculates separately out Machine Joint Surfaces
Normal direction or tangential dynamic-characteristic parameters；
When acceleration transducer is placed on the top of the second sample, in the step 6, acceleration transducer is to second
The normal vibration frequency of sample and the first sample measures, and finally calculates the normal dynamic characteristics parameter of Machine Joint Surfaces；
When among the Machine Joint Surfaces that acceleration transducer is pasted onto the first sample and the second sample, in the step 6
In, acceleration transducer measures the tangential vibrations frequency of the second sample and the first sample, finally calculates mechanical bond
The tangential dynamic-characteristic parameters in face.
The invention has the benefit that
(1) present invention can be finely adjusted the height of vibration excitor by the way that screw jack is arranged, and be arranged on top plate
Circular groove and circular through hole make vibration excitor have the space moved down；The present invention passes through longitudinal leadscrew, longitudinally rounded guide rail
And the combined use of guide rail fixing clamp, enable to top plate to move up and down or be fixed on longitudinal circle along longitudinally rounded guide rail
On shape guide rail；The present invention is made by the combination of feed screw nut combination, motor, cross slide way and fixing seat, nut seat, support base
With enabling to sliding block, transversely guide rail is for linear motion.
(2) present invention is by adjusting the modes of emplacement of the second sample and the forms of motion of sliding block, can selective measurement it is solid
Determine faying face or relatively moves the dynamic characteristic parameter of faying face；The present invention can by the speed of service of motor adjusting slider from
And the speed of service of first sample relative to the second sample is adjusted, so as to the relative movement faying face under different condition
Dynamic characteristic parameter measures；The present invention controls the excited frequency of vibration excitor by computer and signal generator, to control
The vibration frequency of the first sample and the second sample is made, and by adjusting the modes of emplacement of acceleration transducer, binding signal is received
Device and computer, be capable of selective measurement Machine Joint Surfaces normal direction or tangential dynamic characteristic parameter, so as to improve survey
Measure precision, validity and the versatility of result.
(3) the device of the invention is single-mode system, compares multivariant measuring device, structure is simple, and can
The measurement that the dynamic characteristic parameter of the multiple directions of a variety of Machine Joint Surfaces is carried out with set of device reduces the complexity of test
Degree.
Detailed description of the invention
Fig. 1 is the main view of the Machine Joint Surfaces dynamic characteristic parameter measuring device of the embodiment of the present invention one；
Fig. 2 is the side view of the Machine Joint Surfaces dynamic characteristic parameter measuring device of the embodiment of the present invention one；
Fig. 3 is the structural schematic diagram of nut seat and nut of the invention；
Fig. 4 is removing sliding block, longitudinally rounded guide rail, indulging for Machine Joint Surfaces dynamic characteristic parameter measuring device of the invention
The structural schematic diagram of part below top plate after to lead screw；
Connection relationship diagram of the Fig. 5 between nut seat and sliding block of the invention；
Fig. 6 is the structural schematic diagram of sliding block of the invention；
Fig. 7 is the structural schematic diagram of top plate of the invention；
Fig. 8 is the structural schematic diagram of vibration excitor of the invention；
Fig. 9 is the structural schematic diagram of the first sample of the invention.
In figure, 1- pedestal, the first groove of 1-1-, 2- top plate, 2-1- circular groove, 2-2- circular through hole, 2-3-
Second bolt hole, the combination of 3- feed screw nut, 3-1- horizontal leading screw, 3-2- nut, 4-1- fixing seat, 4-1-1- third spiral shell
Keyhole, 4-2- nut seat, the 4th bolt hole of 4-2-1-, 4-3- support base, the 6th bolt hole of 4-3-1-, 5- cross slide way,
6- sliding block, the second groove of 6-1-, the first bolt hole of 6-2-, the 5th bolt hole of 6-3-, the longitudinally rounded guide rail of 7-, 8- are longitudinal
Lead screw, 9- guide rail fixing clamp, 10- vibration excitor, 10-1- exciter body, 10-2- exciting rod, 10-3- vibration excitor are visited
Head, 10-4- vibration excitor shaft, 10-5- exciting shell, 11- support plate, 12- screw jack, the first sample of 13-, 13-
1- sample attachment base, the 7th bolt hole of 13-1-1-, 13-2- cylindricality joint head, the second sample of 14-.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
The object of the present invention is to provide a kind of Machine Joint Surfaces dynamic characteristic parameter measuring device and methods, can keep
On the basis of single-degree-of-freedom, alternative measurement fixed combinating surface or the normal direction or tangential dynamic characteristic ginseng for relatively moving faying face
Number, improves the precision, validity and versatility of measurement result.
Embodiment one
As depicted in figs. 1 and 2, the respectively Machine Joint Surfaces dynamic characteristic parameter measuring device of the embodiment of the present invention one
Main view and side view.As shown in figure 3, being the structural schematic diagram of nut seat and nut of the invention.As shown in figure 4, for this
The Machine Joint Surfaces dynamic characteristic parameter measuring device of invention remove after sliding block, longitudinally rounded guide rail, longitudinal leadscrew top plate with
The structural schematic diagram of lower part.
Machine Joint Surfaces dynamic characteristic parameter measuring device of the invention, it is characterised in that: including pedestal 1, top plate 2；Institute
Stating pedestal 1, middle part is offered equipped with nut seat 4-2 in the first groove 1-1, the first groove 1-1 above, and described first is recessed
Slot 1-1 is respectively equipped with fixing seat 4-1 and support base 4-3 in the two sides nut seat 4-2, the fixing seat 4-1 and support base 4-3 with
Pedestal 1 is bolted；The first groove 1-1 is additionally provided with feed screw nut combination 3, the feed screw nut combination 3 above
Including horizontal leading screw 3-1 and nut 3-2, the horizontal leading screw 3-1 is connect with fixing seat 4-1 at one end, the horizontal leading screw 3-1
It is connect in the other end with support base 4-3, the horizontal leading screw 3-1 passes through nut 3-2 at middle part, and the nut 3-2 is worn at one end
Enter in nut seat 4-2；The horizontal leading screw 3-1 is connected with motor.
As shown in figure 5, the connection relationship diagram between nut seat and sliding block of the invention.As shown in fig. 6, being this hair
The structural schematic diagram of bright sliding block.From Fig. 1 to Fig. 2, Fig. 5 to Fig. 6 can be seen that the pedestal 1 in the first two sides pair groove 1-1
Two cross slide ways 5 for claiming setting to be parallel to horizontal leading screw 3-1, the nut seat 4-2 has been bolted vertical above
Directly in the sliding block 6 of cross slide way 5, the sliding block 6 lower section two sides symmetrically open up be parallel to two of cross slide way 5 it is second recessed
Slot 6-1, the sliding block 6 are slidably connected on two cross slide ways 5 by two the second groove 6-1, the sliding block 6 above in
Portion offers one group of first bolt hole 6-2 in crossing distribution.
The pedestal 1 is plugged with symmetrically arranged two groups longitudinally rounded guide rails 7 and two in the outside of two cross slide ways 5
Longitudinal leadscrew 8, every group of longitudinally rounded guide rail 7 include two longitudinally rounded guide rails 7, and the longitudinal leadscrew 8 is located at one group of longitudinal circle
Between two longitudinally rounded guide rails 7 in shape guide rail 7；The longitudinally rounded guide rail 7 is pierced by top plate with longitudinal leadscrew 8 above
2, the longitudinally rounded guide rail 7 is fixed with below top plate 2 by guide rail fixing clamp 9, and the longitudinal leadscrew 8 passes through with top plate 2
It is threadedly coupled.
It as shown in Figure 7, Figure 8, is top plate of the invention, the structural schematic diagram of vibration excitor.From Fig. 1 to Fig. 2, Fig. 7 to Fig. 8 can
To find out, the top plate 2 offers circular groove 2-1 at middle part, and the circular groove 2-1 offers circular through hole 2- at middle part
2, the circular groove 2-1 are distributed along the circumference with multiple second bolt hole 2-3 in bottom；The top plate 2 is laid above middle part
There is vibration excitor 10, the vibration excitor 10 includes exciter body 10-1, and the exciter body 10-1 is equipped with longitudinal exciting
Vibration excitor probe 10-3, the vibration excitor are equipped with below bar 10-2 and lateral vibration excitor shaft 10-4, the exciting rod 10-2
Ontology 10-1 is connected with exciting shell 10-5 by vibration excitor shaft 10-4；The diameter of the exciter body 10-1 is less than round recessed
The diameter of slot 2-1, the diameter of the exciting rod 10-2 are less than the diameter of circular through hole 2-2；The exciting shell 10-5 and vibration excitor
Support plate 11 is equipped between the upper end of ontology 10-1, the support plate 11 is bolted with exciting shell 10-5, the support
Plate 11 is symmetrically arranged with two screw jack 12 in lower section two sides, and the screw jack 12 is placed on top plate 2.
The vibration excitor 10 is electrically connected with signal generator, and the signal generator is electrically connected with computer；The pedestal
On be laid with acceleration transducer, the acceleration transducer is connected with signal receiver, the signal receiver and computer
Electrical connection.
In the present embodiment one, the fixing seat 4-1 is symmetrical arranged in two sides there are two third bolt hole 4-1-1, described solid
Reservation 4-1 and pedestal 1 are realized by two bolts to be connected；The nut seat 4-2 is symmetrically arranged with two group of the 4th bolt in two sides
Hole 4-2-1, every group of the 4th bolt hole 4-2-1 includes two the 4th bolt hole 4-2-1, and the sliding block 6 is symmetrically arranged in two sides
Two group fiveth bolt hole 6-3 corresponding with two group of the 4th position bolt hole 4-2-1, the sliding block 6 and nut seat 4-2 pass through four
Bolt realizes connection；The support base 4-3 is symmetrically arranged with two group of the 6th bolt hole 4-3-1, every group of the 6th bolt hole in two sides
4-3-1 includes that two the 6th bolt hole 4-3-1, the support base 4-3 and pedestal 1 are connected by four bolts realizations.
In the present embodiment one, vibration excitor probe 10-3 is equipped with pressure sensor in lower section, the pressure sensor with
Signal receiver electrical connection, the pressure sensor can measure the pressure between vibration excitor probe 10-3 and the second sample 14.
Of the invention carries out Machine Joint Surfaces dynamic characteristic using above-mentioned Machine Joint Surfaces dynamic characteristic parameter measuring device
The method of parameter measurement, which is characterized in that include the following steps:
Step 1: determination will measure the first sample 13 and the second sample 14 of Machine Joint Surfaces dynamic characteristic parameter, by first
Sample 13 is placed on 6 upper center of sliding block, selects the first bolt, is screwed into after the first bolt to be screwed into the bolt hole of the first sample 13
First bolt hole 6-2 is until the first sample 13 is fixedly connected with sliding block 6；
Step 2: moving sliding block 6 along cross slide way 5, the vibration excitor probe 10-3 above 6 center face of sliding block；
Step 3: the type of the determination Machine Joint Surfaces to be measured: the Machine Joint Surfaces to measurement are fixed combinating surface,
Then follow the steps 3.1；Machine Joint Surfaces to measurement are relative movement faying face, then follow the steps 3.2；
Step 3.1: the second sample 14 being placed on 13 top of the first sample, then executes step 4.1；
Step 3.2: the second bolt of selection is screwed into the second bolt hole after the second bolt to be screwed into the bolt hole of the second sample 14
2-3 is fixedly connected up to the second sample 14 with 2 lower end of top plate, then executes step 4.2；
Step 4:
Step 4.1: screw jack 12 is adjusted, support plate 11 is moved down, vibration excitor 10 is driven to move down, until
Vibration excitor probe 10-3 stretches out circular through hole 2-2, adjusts loose guide rail fixing clamp 9, is then adjusted in synchronism two longitudinal leadscrews 8, band
Dynamic top plate 2 is moved down along longitudinally rounded guide rail 7, and when vibration excitor probe 10-3 contacts the second sample 14, it is solid to tighten guide rail
Then clamp tool 9 executes step 5.1 so that top plate 2 to be fixed on longitudinally rounded 7 guide rail；
Step 4.2: screw jack 12 is adjusted, support plate 11 is moved down, vibration excitor 10 is driven to move down, until
Vibration excitor probe 10-3 contacts the second sample 14, adjusts loose guide rail fixing clamp 9, is then adjusted in synchronism two longitudinal leadscrews 8, drive
Top plate 2 is moved down along longitudinally rounded guide rail 7, when the second sample 14 contacts the first sample 13, tightens guide rail fixing clamp 9
Top plate 2 to be fixed on 7 on longitudinally rounded guide rail, step 5.2 is then executed；
Step 5:
Step 5.1: the vibration frequency of setting vibration excitor 10 sends respective frequencies by computer control signal generator
Electric signal opens vibration excitor 10 to vibration excitor 10, is applied by vibration excitor probe 10-3 to the second sample 14 and the first 13 samples of examination
Exciting force, under the action of exciting force, the second sample 14 is vibrated with the first sample 13, then executes step 6；
Step 5.2: the vibration frequency of setting vibration excitor 10 sends respective frequencies by computer control signal generator
Electric signal opens vibration excitor 10 to vibration excitor 10, is applied by vibration excitor probe 10-3 to the second sample 14 and the first sample 13
Exciting force, under the action of exciting force, the second sample 14 is vibrated with the first sample 13；Motor is opened, in the drive of motor
Lower horizontal leading screw 3-1 rotation, driving nut 3-2 and sliding block 6, transversely guide rail 5 is for linear motion；
Step 6: acceleration transducer measures the vibration frequency of the second sample 14 and the first sample 13 and sends phase
The electric signal answered is to signal receiver, and signal receiver sends corresponding electric signal to computer, and computer is to the telecommunications received
It number is analyzed and is handled, calculate the dynamic characteristic parameter of the Machine Joint Surfaces of the first sample 13 and the second sample 14, it is described
Dynamic characteristic parameter includes contact stiffness and contact damping.
As shown in figure 9, being the structural schematic diagram of the first sample of the invention.From fig. 9, it can be seen that first sample 13
Including sample attachment base 13-1, first sample 13 extends outward cylindricality joint head 13- in the middle part of sample attachment base 13-1
2, the cylindricality joint head 13-2 and sample attachment base 13-1 are integrally formed, and the sample attachment base 13-1 is in cylindricality joint head
The two sides of 13-2 are arranged symmetrically, and there are two the 7th bolt hole 13-1-1,13 sizes of second sample 14 and the first sample, structure
It is all the same.In the step 1,13-1-1 is screwed into the first bolt hole after the first bolt to be screwed into the 7th bolt hole of the first sample 13
6-2 is until the first sample 13 is fixedly connected with sliding block 6；In the step 3.1, the cylindricality joint head of the second sample 14 is placed on
Above the cylindricality joint head 13-2 of first sample 13, acceleration transducer is placed on pedestal 1 or the sample of the first sample 13
On the attachment base 13-1 or top of the second sample 14 is pasted among the Machine Joint Surfaces of the first sample 13 and the second sample 14；
In the step 3.2, the second bolt hole 2-3 is screwed into until second after the second bolt to be screwed into the 7th bolt hole of the second sample 14
Sample 14 is fixedly connected with 2 lower end of top plate, and acceleration transducer is placed on pedestal 1 or the sample attachment base of the first sample 13
On 13-1.
When acceleration transducer is placed on pedestal 1, in the step 6, acceleration transducer is to the second sample 14
And first the normal vibration frequency of sample 13 measure, finally calculate the normal dynamic characteristics parameter of Machine Joint Surfaces；
When acceleration transducer is placed on the sample attachment base 13-1 of the first sample 13, in the step 6, accelerate
Degree sensor measures the normal direction or tangential vibrations frequency of the second sample 14 and the first sample 13, finally calculates separately out machine
The normal direction or tangential dynamic-characteristic parameters of tool faying face；
When acceleration transducer is placed on the top of the second sample 14, in the step 6, acceleration transducer is to
The normal vibration frequency of two samples 14 and the first sample 13 measures, and finally calculates the normal dynamic characteristics of Machine Joint Surfaces
Parameter；
When among the Machine Joint Surfaces that acceleration transducer is pasted onto the first sample 13 and the second sample 14, in the step
In rapid 6, acceleration transducer measures the tangential vibrations frequency of the second sample 14 and the first sample 13, finally calculates machine
The tangential dynamic-characteristic parameters of tool faying face.
In the present embodiment one, in step 3, the determination Machine Joint Surfaces to be measured are relative movement faying face, execute step
Rapid 3.2, step 4.2 is then executed, then execute step 5.2, finally executes step 6.It, will in step 3.2 in the present embodiment one
Acceleration transducer is placed on the sample attachment base 13-1 of the first sample 13；In the step 6, acceleration transducer is to
The tangential vibrations frequency of two samples 14 and the first sample 13 measures, and finally calculates the tangential dynamic characteristic of Machine Joint Surfaces
Parameter.
Embodiment two
The present embodiment two and above-described embodiment one the difference is that: in the step 6, acceleration transducer is to the
The normal vibration frequency of two samples 14 and the first sample 13 measures, and finally calculates separately out the normal direction dynamic of Machine Joint Surfaces
Characterisitic parameter.
Embodiment three
The present embodiment three and above-described embodiment one the difference is that: in step 3.2, acceleration transducer is placed
On pedestal 1；In the step 6, acceleration transducer to the normal vibration frequency of the second sample 14 and the first sample 13 into
Row measurement, finally calculates the normal dynamic characteristics parameter of Machine Joint Surfaces.
Example IV
The present embodiment four and above-described embodiment one the difference is that: in step 3, the determination mechanical bond to be measured
Face is fixed combinating surface, executes step 3.1, then executes step 4.1, then execute step 5.1, finally executes step 6.This implementation
In example four, in step 3.1, acceleration transducer is pasted onto the Machine Joint Surfaces of the first sample 13 and the second sample 14
Between；In the step 6, acceleration transducer measures the tangential vibrations frequency of the second sample 14 and the first sample 13,
Finally calculate the tangential dynamic-characteristic parameters of Machine Joint Surfaces.
Embodiment five
The present embodiment five and above-described embodiment four the difference is that: in step 3.1, acceleration transducer is placed
In the top of the second sample 14；In the step 6, acceleration transducer shakes to the normal direction of the second sample 14 and the first sample 13
Dynamic frequency measures, and finally calculates the normal dynamic characteristics parameter of Machine Joint Surfaces.
Embodiment six
The present embodiment six and above-described embodiment four the difference is that: in step 3.1, acceleration transducer is placed
On the sample attachment base 13-1 of the first sample 13.In the step 6, acceleration transducer is to the second sample 14 and the first examination
The tangential vibrations frequency of sample 13 measures, and finally calculates the tangential dynamic-characteristic parameters of Machine Joint Surfaces.
Embodiment seven
The present embodiment seven and above-described embodiment four the difference is that: in step 3.1, acceleration transducer is placed
On the sample attachment base 13-1 of the first sample 13；In the step 6, acceleration transducer is to the second sample 14 and the first examination
The normal vibration frequency of sample 13 measures, and finally calculates the normal dynamic characteristics parameter of Machine Joint Surfaces.
Embodiment eight
The present embodiment eight and above-described embodiment four the difference is that: in step 3.1, acceleration transducer is placed
On pedestal 1；In the step 6, acceleration transducer to the normal vibration frequency of the second sample 14 and the first sample 13 into
Row measurement, finally calculates the normal dynamic characteristics parameter of Machine Joint Surfaces.
Obviously, above-described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Above-mentioned implementation
Example for explaining only the invention, is not intended to limit the scope of the present invention..Based on the above embodiment, those skilled in the art
Member's every other embodiment obtained namely all in spirit herein and original without making creative work
Made all modifications, equivalent replacement and improvement etc., are all fallen within the protection domain of application claims within reason.
Claims (6)
1. a kind of Machine Joint Surfaces dynamic characteristic parameter measuring device, it is characterised in that: including pedestal, top plate；The pedestal exists
Upper center offers the first groove, and nut seat is equipped in first groove, and first groove is distinguished in nut seat two sides
Equipped with fixing seat and support base, the fixing seat is bolted with pedestal with support base；First groove is above
It is additionally provided with feed screw nut combination, the feed screw nut combination includes horizontal leading screw and nut, and the horizontal leading screw is at one end and solid
Reservation connection, the horizontal leading screw are connect in the other end with support base, and the horizontal leading screw passes through nut, the nut at middle part
It penetrates in nut seat at one end；The horizontal leading screw is connected with motor；
The pedestal is symmetrical arranged two cross slide ways for being parallel to horizontal leading screw in the first groove two sides, and the nut seat exists
The sliding block perpendicular to cross slide way is bolted in top, and the sliding block symmetrically opens up in lower section two sides and is parallel to transverse direction
Two the second grooves of guide rail, the sliding block are slidably connected on two cross slide ways by two the second grooves, the sliding block
Middle part offers one group of first bolt hole in crossing distribution above；
The pedestal is plugged with symmetrically arranged two groups of longitudinally rounded guide rails and two longitudinal silks on the outside of two cross slide ways
Thick stick, every group of longitudinally rounded guide rail include two longitudinally rounded guide rails, and the longitudinal leadscrew is located in one group of longitudinally rounded guide rail
Between two longitudinally rounded guide rails；The longitudinally rounded guide rail and longitudinal leadscrew are pierced by top plate above, described longitudinally rounded
Guide rail is fixed with below top plate by guide rail fixing clamp, and the longitudinal leadscrew is connected through a screw thread with top plate；
The top plate offers circular groove at middle part, and the circular groove offers circular through hole at middle part, and the circle is recessed
Slot is distributed along the circumference with multiple second bolts hole in bottom；The top plate is laid with vibration excitor, the vibration excitor above middle part
Including exciter body, the exciter body is equipped with longitudinal exciting rod and lateral vibration excitor shaft, the exciting rod
Lower section is popped one's head in equipped with vibration excitor, and the exciter body is connected with exciting shell by vibration excitor shaft；The exciter body
Diameter is less than the diameter of circular groove, and the diameter of the exciting rod is less than the diameter of circular through hole；The exciting shell and vibration excitor
Support plate is equipped between the upper end of ontology, the support plate is bolted with exciting shell, and the support plate is in lower section two sides
Two screw jack are symmetrically arranged with, the screw jack is placed on top plate；
The vibration excitor is electrically connected with signal generator, and the signal generator is electrically connected with computer；It is laid on the pedestal
There is acceleration transducer, the acceleration transducer is connected with signal receiver, the signal receiver and calculating mechatronics.
2. Machine Joint Surfaces dynamic characteristic parameter measuring device according to claim 1, it is characterised in that: the fixing seat
It is symmetrical arranged in two sides there are two third bolt hole, the fixing seat and pedestal pass through two bolts realizations and connect；The nut
Seat is symmetrically arranged with two group of the 4th bolt hole in two sides, and every group of the 4th bolt hole includes two the 4th bolts hole, and the sliding block exists
Two sides are symmetrically arranged with two group of the 5th bolt hole corresponding with two group of the 4th bolt hole position, and the sliding block and nut seat pass through four
A bolt realizes connection；The support base is symmetrically arranged with two group of the 6th bolt hole in two sides, and every group of the 6th bolt hole includes two
A 6th bolt hole, the support base and pedestal are realized by four bolts and are connected.
3. Machine Joint Surfaces dynamic characteristic parameter measuring device according to claim 1, it is characterised in that: the vibration excitor
Probe is equipped with pressure sensor in lower section, and the pressure sensor is electrically connected with signal receiver, and the pressure sensor can
Measure the pressure between vibration excitor probe and the second sample.
4. a kind of carried out using Machine Joint Surfaces dynamic characteristic parameter measuring device as claimed any one in claims 1 to 3
The method of Machine Joint Surfaces dynamic characteristic parameter measurement, which is characterized in that include the following steps:
Step 1: determination will measure the first sample and the second sample of Machine Joint Surfaces dynamic characteristic parameter, and the first sample is placed
In sliding block upper center, the first bolt is selected, the first bolt is screwed into after the bolt hole of the first sample to be screwed into the first bolt hole straight
It is fixedly connected with a slide block to the first sample；
Step 2: moving sliding block along cross slide way, the vibration excitor probe above center face；
Step 3: the type of the determination Machine Joint Surfaces to be measured: the Machine Joint Surfaces to measurement are fixed combinating surface, then hold
Row step 3.1；Machine Joint Surfaces to measurement are relative movement faying face, then follow the steps 3.2；
Step 3.1: the second sample being placed on above the first sample, step 4.1 is then executed；
Step 3.2: the second bolt is screwed into after the bolt hole of the second sample and is screwed into the second bolt hole until the by the second bolt of selection
Two samples are fixedly connected with top plate lower end, then execute step 4.2；
Step 4:
Step 4.1: adjusting screw jack, move down support plate, vibration excitor is driven to move down, until vibration excitor is popped one's head in
Circular through hole is stretched out, loose guide rail fixing clamp is adjusted, is then adjusted in synchronism two longitudinal leadscrews, top plate is driven to lead along longitudinally rounded
Rail moves down, and when vibration excitor the second sample of probe contacts, it is longitudinally rounded top plate to be fixed on to tighten guide rail fixing clamp
On guide rail, step 5.1 is then executed；
Step 4.2: adjusting screw jack, move down support plate, vibration excitor is driven to move down, until vibration excitor is popped one's head in
The second sample is contacted, loose guide rail fixing clamp is adjusted, is then adjusted in synchronism two longitudinal leadscrews, top plate is driven to lead along longitudinally rounded
Rail moves down, and when second the first sample of sample contacts, tightens guide rail fixing clamp so that top plate is fixed on longitudinally rounded lead
On rail, step 5.2 is then executed；
Step 5:
Step 5.1: setting the vibration frequency of vibration excitor, the electric signal of respective frequencies is sent by computer control signal generator
To vibration excitor, vibration excitor is opened, is popped one's head in by vibration excitor and applies exciting force to the second sample and the first sample, in the work of exciting force
Under, the second sample is vibrated with the first sample, then executes step 6；
Step 5.2: setting the vibration frequency of vibration excitor, the electric signal of respective frequencies is sent by computer control signal generator
To vibration excitor, vibration excitor is opened, is popped one's head in by vibration excitor and applies exciting force to the second sample and the first sample, in the work of exciting force
Under, the second sample is vibrated with the first sample；Motor is opened, horizontal leading screw rotates driven by the motor, drives nut
And transversely guide rail is for linear motion for sliding block；
Step 6: acceleration transducer measures the vibration frequency of the second sample and the first sample and sends corresponding telecommunications
Number signal receiver is given, signal receiver sends corresponding electric signal to computer, and computer divides the electric signal received
Analysis and processing, calculate the dynamic characteristic parameter of the Machine Joint Surfaces of the first sample and the second sample, the dynamic characteristic parameter
Including contact stiffness and contact damping.
5. Machine Joint Surfaces dynamic characteristic parameter measurement method according to claim 4, it is characterised in that: first examination
Sample includes sample attachment base, and first sample extends outward cylindricality joint head, the cylindricality knot in the middle part of sample attachment base
Syncephalon and sample attachment base are integrally formed, and the sample attachment base is symmetrical arranged that there are two the 7th spiral shells in the two sides of cylindricality joint head
Keyhole, second sample and the first sample size, structure are all the same；
The first bolt hole is screwed into the step 1, after the first bolt to be screwed into the 7th bolt hole of the first sample until the first examination
Sample is fixedly connected with a slide block；
In the step 3.1, the cylindricality joint head of the second sample is placed on above the cylindricality joint head of the first sample, will be accelerated
Degree sensor is placed on pedestal or on the sample attachment base of the first sample or top of the second sample or is pasted onto the first sample
Among the Machine Joint Surfaces of the second sample；
In the step 3.2, the second bolt hole is screwed into until second after the second bolt to be screwed into the 7th bolt hole of the second sample
Sample is fixedly connected with top plate lower end, and acceleration transducer is placed on pedestal or on the sample attachment base of the first sample.
6. Machine Joint Surfaces dynamic characteristic parameter measurement method according to claim 5, it is characterised in that:
When acceleration transducer is placed on pedestal, in the step 6, acceleration transducer tries the second sample and first
The normal vibration frequency of sample measures, and finally calculates the normal dynamic characteristics parameter of Machine Joint Surfaces；
When acceleration transducer is placed on the sample attachment base of the first sample, in the step 6, acceleration transducer pair
The normal direction or tangential vibrations frequency of second sample and the first sample measure, and finally calculate separately out the normal direction of Machine Joint Surfaces
Or tangential dynamic-characteristic parameters；
When acceleration transducer is placed on the top of the second sample, in the step 6, acceleration transducer is to the second sample
And first the normal vibration frequency of sample measure, finally calculate the normal dynamic characteristics parameter of Machine Joint Surfaces；
When among the Machine Joint Surfaces that acceleration transducer is pasted onto the first sample and the second sample, in the step 6, add
Velocity sensor measures the tangential vibrations frequency of the second sample and the first sample, finally calculates cutting for Machine Joint Surfaces
To dynamic characteristic parameter.
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| CN201910080947.0A CN109813513B (en) | 2019-01-28 | 2019-01-28 | Device and method for measuring dynamic characteristic parameters of mechanical joint surface |
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| CN109813513B (en) | 2020-10-09 |
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Effective date of registration: 20230713 Address after: Industry 4th Road, Longhua Industrial Zone, Jing County, Hengshui City, Hebei Province 053511 Patentee after: Hebei Jitai Machinery Technology Co.,Ltd. Address before: 110168 Liaoning province Shenyang Hunnan Hunnan Road No. 9 Patentee before: SHENYANG JIANZHU University |