CN107388943A - A kind of engine valve stem detection method - Google Patents
A kind of engine valve stem detection method Download PDFInfo
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- CN107388943A CN107388943A CN201710576048.0A CN201710576048A CN107388943A CN 107388943 A CN107388943 A CN 107388943A CN 201710576048 A CN201710576048 A CN 201710576048A CN 107388943 A CN107388943 A CN 107388943A
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- valve stem
- engine valve
- detection
- locating piece
- positioning
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/24—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B5/25—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
- G01B5/252—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes for measuring eccentricity, i.e. lateral shift between two parallel axes
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- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention discloses a kind of engine valve stem detection method, it is characterized in that, during detection, engine valve stem to be detected is positioned on two locating surfaces of two sections of location structures, then pushing down engine valve stem makes it form the linear contact lay along two parallel lines with two locating surfaces respectively, the detection breach for detection is reserved between two sections of location structures, its test side is contacted from detection gap position and engine valve stem peripheral surface using digital dial gauge and produce certain precompressed amount, then fix digital dial gauge；While now keeping the linear contact lay of engine valve stem and two locating surfaces, engine valve stem is pulled along engine valve stem length direction, then observes the variable quantity of digital dial gauge, be i.e. detection obtains the straight line degrees of data of engine valve stem.The present invention have implement it is simple, it is easy to operate, the detection of engine valve stem linearity can be realized, and be further able to realize that engine valve stem end face run-out tolerance detects, while testing result accurately and reliably the characteristics of.
Description
Technical field
Part of automobile engine of the present invention produces detection technique field, more particularly to a kind of engine valve stem detection method.
Background technology
Automobile engine can be converted into mechanical energy by the chemical energy of fuel or by other forms, be provided for automobile dynamic
Power, it is the heart of automobile, belongs to a kind of technology-intensive product.With China's expanding economy, to automobile demand amount and day
All auto industry is developed rapidly while increase, and people are to the performance requirement of automobile engine also more and more higher.
In automobile engine, inlet and exhaust valve is that the bar portion being integrated is coaxially disposed with round plate by a round plate and one
The component of composition, belong to one of automobile engine key components and parts, be the door of engine chamber, be engine working process
The key foundation part of middle sealing porting, for blocking gas channel, controls the gas exchanges of engine.In engine
In each course of work, inlet valve and exhaust valve are all respectively opened and closed once when valve opens and closes, and valve is born
The pressure of valve spring and pressure when taking a seat.Inlet valve and exhaust valve serve close particularly in compression and expansion stroke
Seal the effect of combustion chamber.Therefore, the quality of valve quality has important influence to engine performance and life-span.
Motion of the machining accuracy and structure of valve to engine valve actuating mechanism play the role of it is very important, while wherein
The bar portion of valve is the key position of valve, and it is both design basis and technique and detection benchmark, and it almost owns with valve
There is substantial connection at position, and traditional engine valve stem detection mode, which needs to rely on, largely manually to be completed, and testing cost is efficient
Rate is low, and carries out quality cubing related to accuracy detection and easily influenceed by the factor of operating personnel, easily due to human eye vision
Fatigue easily causes the unstability of detection, increases the error rate of product.It is difficult to meet the product quality requirement improved constantly.
Engine valve stem refers to that part to be worked in valve guide bushing, and the quality of its bar portion linearity directly affects gas
The normal work of door.In process of factory production, engine valve stem linearity has the technique being straightened to it to be ensured.And
In existing valve manufacturing enterprise, some valve manufacturing enterprises are carried out mainly by universal tool-measuring microscope to engine valve stem linearity
Detection.Because its inspection cost is high, required time length, therefore examine engine valve stem linearity and number and batch very limited, directly
Connect and think to have the technique of alignment to be ensured.Enterprise without universal tool-measuring microscope typically no examines to this project
Survey.One of whether valve stem end surface is smooth simultaneously, and an important factor for influence valve assembly precision, existing manufacturing enterprise is to bar
End face run-out is mainly detected using end face run-out instrument, there is that equipment is larger, and cost is higher, and the shared big grade of spatial volume lacks
Fall into, seriously improve the production cost of enterprise.
Therefore how to design it is a kind of simple in construction, it is easy to operate, detect reliable engine valve stem detection method to realize
Detection to engine valve stem data, turning into has considered solve the problems, such as.
The content of the invention
The technical problem to be solved in the present invention is：It is simple how a kind of implementation is provided, it is easy to operate, it can realize
The detection of engine valve stem linearity, can realize engine valve stem end face flatness detection, and testing result accurately and reliably valve
Bar portion detection method.
In order to solve the above-mentioned technical problem, present invention employs following technical scheme.
A kind of engine valve stem detection method, engine valve stem Linearity surveying is realized using digital dial gauge in this method, its
It is characterised by, during engine valve stem Linearity surveying, engine valve stem to be detected is positioned to two positioning of two sections of location structures
On face, then pushing down engine valve stem makes it form the linear contact lay along two parallel lines, two sections of positioning knots with two locating surfaces respectively
The detection breach for detection is reserved between structure, its test side is made from detection gap position and engine valve stem using digital dial gauge
Peripheral surface contacts and produces certain precompressed amount, then fixes digital dial gauge；Now keep engine valve stem and two fixed
While the linear contact lay of plane, engine valve stem is pulled along engine valve stem length direction, then observes the variable quantity of digital dial gauge,
I.e. detection obtains the straight line degrees of data of engine valve stem.
So, it is to form each two lines contact with location structure during detection, at left and right sides of engine valve stem test point position
Positioning, this avoid surface of position out-of-flatness at valve stem positioning to influence to caused by Linearity surveying, improves detection
Precision and reliability.
In this method, engine valve stem Linearity surveying is realized using engine valve stem linearity testing apparatus, engine valve stem is straight
Dimension detection means includes bottom block, it is characterised in that engine valve stem positioning fixture is provided with bottom block and engine valve stem is straight
Dimension testing agency, the engine valve stem positioning fixture include the location structure that two sections of length directions of following wind one are set, and every section fixed
Bit architecture includes two intersecting locating surfaces in angle, and two locating surfaces of two location structures each can be used in and valve stem
The linear contact lay formed on same straight line, the position between two sections of location structures is formed with a detection breach；The engine valve stem
Straightness detection mechanism includes an engine valve stem Linearity surveying digital dial gauge, and there is digital dial gauge a level to set
The cooperation section put, section is coordinated to coordinate in the mating holes being arranged on an amesdial matching seat of bottom block, it is described with being combined into
It can be slidably matched along what digital dial gauge detection bar length direction slided, be additionally provided with amesdial matching seat to engine valve stem
The amesdial fixed structure that Linearity surveying is fixed with digital dial gauge, digital dial gauge detection bar is after positioning
Valve stem direction of axis line and face detection gap position setting, and digital dial gauge detection bar front end is formed with a detection
End, the contact of valve stem peripheral surface, which is realized, after the test side is used for and positioned detects.
So, during detection, engine valve stem to be detected can be positioned on two locating surfaces of two sections of location structures, so
After push down engine valve stem and it is formed linear contact lays with two locating surfaces respectively, then adjust digital dial gauge position, make its test side
Contacted from detection gap position and engine valve stem peripheral surface and produce certain precompressed amount, then by amesdial fixed structure
Fix digital dial gauge.While now keeping the linear contact lay of engine valve stem and two locating surfaces, along engine valve stem length side
To engine valve stem is pulled, the variable quantity of digital dial gauge is then observed, you can detection obtains the straight line degrees of data of engine valve stem；This
Sample, it is the positioning that each two lines contact is formed with location structure during detection, at left and right sides of engine valve stem test point position, so
Avoid surface of position out-of-flatness at valve stem positioning influences to caused by Linearity surveying, improves accuracy of detection and reliable
Property.Therefore with simple in construction, easy to operate, the characteristics of accuracy of detection is high.Wherein mating holes is horizontally disposed with, with more convenient regulation
Detection.
As optimization, engine valve stem positioning fixture includes the first locating piece and the second positioning of overall rectangular-blocklike structure
Block, the first locating piece and the fitting of the second locating piece horizontal direction are set and fixed on bottom block so that the first locating piece upper surface
Described two locating surfaces are formed with the fitting side side of the second locating piece, the detection breach is positioned by the first locating piece and second
The groove of block upper surface obtains.
So make its simple in construction, the processing and installation of conveniently positioning structure is formed, and causes the level side formed
To two locating surfaces of a vertical direction, two locating surfaces are mutually perpendicular to, and make its positioning reliably, mutual alignment relation precision can
Lean on.
As optimization, engine valve stem positioning fixture also includes the 3rd locating piece, and the 3rd locating piece relies on screw
It is fixed on bottom block, the 3rd locating piece upper surface is provided with the locating slot of the rectangular body structure of an entirety, locating slot ground
For horizontally disposed locating piece reference plane, position well width and the first locating piece and the second locating piece and be bonded side side along perpendicular to it
The width sum in face direction is consistent so that the first locating piece and the second locating piece are located in locating slot, the first locating piece and
Two locating piece bottom surfaces and the fitting of locating piece reference plane, the overhead surface that locating slot is located at the side position of digital dial gauge one are less than first
Locating piece upper surface location.
So, during assembling, it need to only rely on screw to complete the installation of the 3rd locating piece and fix, then by the first locating piece and the
Clamping loads locating slot after the fitting of two locating pieces, installs very convenient quick, and the first locating piece and the second locating piece
It rigging error, can be determined by the cooperation between the 3rd locating piece, can more facilitate and reduce mismatch error, be greatly enhanced
Accuracy of detection.
As optimization, in addition to engine valve stem pressing device, engine valve stem pressing device includes an elastic component and set
An applicator member on elastic component is put, applicator member is on the direction of two locating surface angle faces and in elastic structure
Engine valve stem peripheral surface contact under the effect of part elastic force and after positioning compresses.
It is so convenient to replace human hand to apply a pressure pair from the direction of two locating surface angles of face by pressing device
Engine valve stem after positioning, which is realized, to be compressed, and itself and two locating surfaces is formed linear contact lay, when so detecting operation, is manually only needed to control
System pulls engine valve stem to be axially moveable.Operator can be preferably liberated, better ensures that accuracy of detection.
As optimization, elastic component is the elastic press of angularly disposed strip, and elastic press lower end is fixed on one
It is installed in a briquetting mounting seat of bottom block, the applicator member is installed in elastic press upper end.
So, it is simple in construction and quick and easy for installation, it is easy to implement.
As optimization, curved arc, elastic press upper center extend forward along the length direction under being in the middle part of elastic press
Formed with installation rotating shaft, the applicator member be rotatably engaged installation rotating shaft on roller body, roller body peripheral surface
Compression is realized for forming point contact with engine valve stem peripheral surface after positioning.
So, rolling friction is formed to improve the smoothness of detection, while roller body as applicator member using roller body
Compared to roll structure, more facilitate while itself assemble, additionally it is possible to preferably it is convenient realize it is circumferential to engine valve stem after positioning
The point contact on surface compresses, and after formation point contact compresses, can preferably reduce influence of the compaction process itself to accuracy of detection.
Further, engine valve stem pressing device is along engine valve stem length direction spacing parallel arranging is set after positioning two
It is individual, while digital dial gauge test side is just being pointed between the applicator member of two engine valve stem pressing devices.So, position is formed
Points are compressed in two of digital dial gauge both sides, it is gentle preferably to keep can also preferably keeping while compression balancing
Door rod moves flexibility, preferably avoids engine valve stem from beating by pressing device, improves accuracy of detection.
As optimization, the cooperation section is formed on the detection rod rear end fixed part of digital dial gauge, the amesdial
Fixed structure includes the amesdial fixing screws being arranged on amesdial matching seat of spinning, and the amesdial fixing screws are just
To on amesdial matching seat mating holes set and front end be used for and mating holes in detection bar peripheral surface contact realize fix.
So, have it is simple in construction, it is convenient to implement, and digital dial gauge being slidably matched and fixation is convenient and reliable etc. excellent
Point.
As optimization, a lengthening is fixedly installed on the active segment of digital dial gauge detection bar front portion forward in the axial direction
Block, lengthening block front end are provided with a detection ball and form the test side.
So, it can preferably extend the length of detection bar, it is smoothly realized detection, while can be conveniently for difference
The corresponding size of the engine valve stem adjustment detection ball of model, makes it more smoothly realize detection, improves detection reliability.
As optimization, lengthen and be provided with vertical crack in the middle part of block front half section along its length, crack causes before lengthening block
It is integrally formed in the front end surface of half section of left front half section of formation and right front half section, the left front half section and right front half section and is used for and examines
Survey the detection ball mounting groove that installation is realized in ball surface fitting.
So, because detection ball mounting groove notch, which is generally, is equal to or slightly less than the spherical with energy of detection ball diameter
Enough clamp detection ball, therefore crack will be lengthened after block front half section is separated to form left front half section and right front half section, can rely on a left side
Front half section and the right front half section elasticity of itself, the convenient embedded installation for detecting ball.
Also there is one as optimization, at crack the inner rounded extended region space is expanded to both sides.
So so that during installation detection ball, the position of left front half section and right front half section generation elastic deformation is in rear end
Extended area locus, front end recovers and remained that detection circle can be clamped after can better ensuring that detection ball installation
The state of ball, avoid left front half section and right front half section front end from producing influence of the elastic deformation to accuracy of detection, improve accuracy of detection.
Further, lengthening in the middle part of the end face of block rear end has a detection bar pilot hole set along its length, detection bar
Pilot hole front end and the extended area space of crack communicate, and digital dial gauge detection bar front end movable part is fixedly mounted on detection
In bar pilot hole, and detection bar front end termination is exposed to the extended area space of crack.So, detection bar pilot hole can be facilitated
And the assembling and alignment between block are lengthened, to improve accuracy of detection.
Further, lengthening block rear end upper surface, which spins, is provided with detection bar fixing bolt, detection bar fixing bolt front end
Fixation is realized for being contacted with digital dial gauge detection bar front end movable part.So, it is simple in construction, and to detection bar fixation side
It can lean on.
Further, left front half section and right front half section, which extend transversely through to spin to be provided with before, lengthens block fixing bolt.So,
After the loading of detection ball is completed, it can rely on and lengthen block fixing bolt and realize to left front half section and right front half section front end along a left side
The limitation of right propagation direction elastic deformation, thoroughly prevent it from producing influence of the elastic deformation to accuracy of detection.
Further, engine valve stem detection method of the invention, in addition to engine valve stem end face run-out tolerance is examined
The step of survey；The detection of engine valve stem end face run-out tolerance is using the realization of valve stem end surface jitter detection apparatus, the valve rod end
Face jitter detection apparatus includes base, and valve positioning fixture and valve stem end face run-out testing agency are provided with base, described
Valve positioning fixture is used to realize the supporting positioning of engine valve stem in the horizontal direction, and valve stem end surface glitch detection mechanism includes one
Individual dial test indicator, the engine valve stem end contact after the gauge head of dial test indicator is used for and positioned realize detection；The valve
Positioning fixture includes the bar portion peripheral surface support base being arranged on along same level straight line on base, bar portion peripheral surface support base
On be provided with the bar portion peripheral surface supporting member positioned for carrying out upward support to bar portion peripheral surface, bar portion circumference table
Face supporting member is used for and the side contacts of bar portion peripheral surface bottom two realize support positioning.
So, after engine valve stem Linearity surveying is realized, valve stem end surface glitch detection dress can also be further relied on
Put the detection for realizing engine valve stem end face run-out tolerance.During detection, valve realizes support by bar portion on valve positioning fixture
Positioning, then after the engine valve stem end contact after the gauge head of dial test indicator lower end and positioning, adjustment valve stem position causes
Certain precompressed is formed to the gauge head of dial test indicator lower end, dial test indicator shows initial reading, then holds valve retainer slowly
Vertical rotary valve can read valve stem end surface run-out tolerance from dial test indicator.The valve locating clip wherein used is signed an undertaking
Structure is simple, and positioning is convenient and swift, is realized beneficial to detection.
As optimization, the bar portion peripheral surface supporting member includes two couple that equivalent and horizontal pair is set and supports ball
Body, two pairs of supporting sepheres are arranged at intervals and each medium position is in same level rectilinear direction, two in each pair supporting sephere
The individual supporting sephere opposite side first half is used for and support positioning is realized in the contact of bar portion peripheral surface.
So, realize to contact bar portion peripheral surface using two pairs of supporting sepheres being arranged in pairs and support, such bar portion and
Supporting member is in point contact, can at utmost be avoided because the irregular of bar portion itself causes axial line during rotation not exist
On straight line and then increase detection error, improve detection accuracy.It can ensure stability of strutting system using two pairs of supporting sepheres.
V-arrangement locating piece can also be used to realize the support positioning of bar portion when implementing certainly, but this structure is two locating surfaces and bar portion
Contact, if bar itself circle is irregular, or locating surface itself flatness is inadequate, there is no axial line when can cause the bar portion to rotate
Point-blank, and then detection error is caused to increase.
Further, two pairs of supporting sepheres are separately positioned on an independent bar portion peripheral surface support base, lever thousand
It is divided on the linear position that table is arranged between two pairs of supporting sepheres.Material is more so saved relative to using a support base,
Convenient support load, while beneficial to the position between two pairs of supporting sepheres of regulation with more convenient detection.
Further, bar portion peripheral surface support base upper center is provided with the rectangular supporting sephere installation in horizontal cross-section
Groove, supporting sephere is paired to be arranged in supporting sephere mounting groove, and two paired supporting sepheres are affixed setting and two supports
The surrounding of spheroid and mounting groove is affixed setting.So, only two equivalent supporting sepheres need to be put into supporting sephere mounting groove
It is interior, it can be automatically positioned without adjustment and be affixed state in level, installed and used efficient and convenient in the extreme.
As optimization, bar portion pressure exerting arrangement, the bar portion pressing machine are additionally provided with any bar portion peripheral surface support base
Structure includes a flexure strip, and flexure strip one end is fixed on bar portion peripheral surface support base, and the other end is provided with positioned at two pairs of branch
The compressing member above spheroid intermediate connection is supportted, the bar portion upper surface after compressing member is used for and positioned presses.
So, a pressure is applied to bar portion upper surface using simple structure, can prevented in detection process, human hand band
The excessive or force that exerted a force during dynamic valve rotation is unbalanced and causes bar portion bounce displacement, better assures that accuracy of detection is reliable.
Further, the compressing member is a roll sleeve being installed in rotation on flexure strip, roll sleeve axis direction and
Bar portion axis direction after installation positioning is consistent.So, rolling both when reducing compressing member and bar portion contact area, while detecting
Friction, can preferably reduce influence of the compressing member to detection.
Further, valve stem end surface glitch detection mechanism also includes a bar portion end face positioning seat, the positioning of bar portion end face
It is provided with seat and carries out spacing bar portion end face limit component for being offseted with bar portion end face；Bar portion end face limit component is one
Horizontally disposed push rod, push rod one end have the top and top end face circle home position for being used for and positioning rear rod portion of cone
Contact spacing；The dial test indicator is fixed on the push rod, and the gauge head of dial test indicator be located at push rod it is top with
Bar portion end face radius of circle is the front side adjacent of the circle location of radius.
So, it is spacing by the round heart contact in top and bar portion end face, it is ensured that to realize to valve stem axial direction
It is spacing, avoid during rotary pneumatic door rod due to causing axial displacement when exerting a force uneven and then testing result is impacted.And
More importantly the position limiting structure can better ensure that bar portion rotary course axis line position is constant, therefore also not interfere with thick stick
Detection of the bar amesdial to bar portion end face run-out, therefore better assure that accuracy of detection.
Dial test indicator mounting seat is provided with the push rod, being horizontally disposed with the dial test indicator mounting seat has push rod
Pilot hole, push rod pilot hole lower section are provided with push rod and clamp seam straight down, and the dial test indicator that push rod clamps seam side is installed
Mounting seat fixing bolt is provided with seat, mounting seat fixing bolt laterally slidably extends through the lever thousand that push rod clamps seam side
Divide table mounting seat and screw thread is rotatably connected in the screwed hole that push rod is clamped on seam opposite side inwall, dial test indicator mounting seat, which relies on, pushes up
Bar pilot hole is slidably fit on push rod and rotary mounting seat fixing bolt can be relied on to realize and fixes；The lever thousand divides
Table is fixedly mounted on dial test indicator upper surface.
So, axial location of the regulation dial test indicator on push rod can preferably be facilitated so that dial test indicator
Gauge head can be precisely located at the top front side adjacent using bar portion end face radius of circle as the circle location of radius of push rod, with suitable
Profit realizes detection.
Further, be provided with a push rod mounting post on the positioning seat of bar portion end face straight up, push rod level through
One push rod mounting hole on push rod mounting post top, push rod mounting post top are also connected with a push rod fixing bolt, and push rod is solid
Determine the push rod in bolt front end and push rod mounting hole and abut the fixation for realizing push rod.So, can easily installation and adjustment push rod
Front and back position.
Further, the vertical push rod installation that the grafting of push rod mounting post lower end is arranged on the positioning seat of bar portion end face
In post jack, also face push rod mounting post jack level positions spiral shell through push rod mounting post is connected with the positioning seat of bar portion end face
Bolt, push rod mounting post bolt front end and push rod mounting post, which abut, fixes.So, it is the next in convenient regulation push rod mounting post
Put, and then adjust push rod height and position, ensure when need to only design production in the middle part of push rod axial line and two pairs of supporting sepheres in same
In one vertical plane, you can adjust the round heart in bar portion end face after the top of push rod and positioning more conveniently when mounted
Contact positioning.
As optimization, base upper surface is provided with dovetail groove, the bar portion peripheral surface support base along valve orientation
Each it is vertically provided with bar portion end face positioning seat lower end and is slidably fit into the fixture block of dovetail groove matching in dovetail groove, bar
It is each also vertical on portion's peripheral surface support base and bar portion end face positioning seat to be provided with the realization of support base fixing bolt through spinning
It is locked.
So, the mutual distance between two bar portion peripheral surface support bases of convenient regulation and bar portion end face positioning seat, with
It is convenient to realize detection.
In summary, the present invention, which has, implements simply, easy to operate, can realize the inspection of engine valve stem linearity
Survey, and be further able to realize that engine valve stem end face run-out tolerance detects, at the same testing result accurately and reliably the characteristics of.
Brief description of the drawings
Fig. 1 is the structural representation of the overlook direction of the engine valve stem linearity testing apparatus used in the embodiment of the present invention
Sketch.
Fig. 2 is Fig. 1 dimensional structure diagram.
Fig. 3 is the structural representation of the overlook direction of the valve stem end surface jitter detection apparatus used in the embodiment of the present invention
Sketch.
Fig. 4 is Fig. 3 dimensional structure diagram.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.
Embodiment：
A kind of engine valve stem detection method, engine valve stem Linearity surveying is realized using digital dial gauge in this method, its feature
It is, during engine valve stem Linearity surveying, engine valve stem to be detected is positioned on two locating surfaces of two sections of location structures,
Then pushing down engine valve stem makes it form the linear contact lay along two parallel lines with two locating surfaces respectively, between two sections of location structures
The detection breach for detection is reserved, its test side is made from detection gap position and engine valve stem circumference table using digital dial gauge
Face contacts and produces certain precompressed amount, then fixes digital dial gauge；Now keep engine valve stem and two locating surfaces
While linear contact lay, engine valve stem is pulled along engine valve stem length direction, the variable quantity of digital dial gauge is then observed, that is, detects
Obtain the straight line degrees of data of engine valve stem.So, it is during detection, at left and right sides of engine valve stem test point position and location structure
The positioning of each two lines contact is formed, this avoid surface of position out-of-flatness at valve stem positioning to caused by Linearity surveying
Influence, improve accuracy of detection and reliability.
Specifically, in present embodiment, realize that engine valve stem linearity is examined using engine valve stem linearity testing apparatus
Survey, as shown in Figure 1-2, including bottom block 31, its feature are engine valve stem linearity testing apparatus, are provided with bottom block 31
Engine valve stem positioning fixture and engine valve stem straightness detection mechanism, the engine valve stem positioning fixture are grown including two sections of following winds one
Spend the location structure that direction is set, every section of location structure includes two intersecting locating surfaces in angle, and the two of two location structures
Individual locating surface each can be used in the linear contact lay formed with valve stem on same straight line, and the position between two sections of location structures is formed
There is a detection breach 32；The engine valve stem straightness detection mechanism includes engine valve stem Linearity surveying numeral thousand
Divide table 33, digital dial gauge 33 has a cooperation section, coordinates section to coordinate and is being arranged at the amesdial cooperation of bottom block 31
It is described to be slidably matched along what digital dial gauge detection bar length direction slided with being combined into be capable of in mating holes on seat 34, thousand points
The amesdial fixed structure that engine valve stem Linearity surveying is fixed with digital dial gauge is additionally provided with table matching seat 34,
Valve stem direction of axis line and face detection breach 32 position of the digital dial gauge detection bar after positioning are set, and numeral
Formed with a test side, the contact of valve stem peripheral surface, which is realized, after the test side is used for and positioned examines for amesdial detection bar front end
Survey.
So, during detection, engine valve stem to be detected can be positioned on two locating surfaces of two sections of location structures, so
After push down engine valve stem and it is formed linear contact lays with two locating surfaces respectively, then adjust digital dial gauge position, make its test side
Contacted from detection gap position and engine valve stem peripheral surface and produce certain precompressed amount, then by amesdial fixed structure
Fix digital dial gauge.While now keeping the linear contact lay of engine valve stem and two locating surfaces, along engine valve stem length side
To engine valve stem is pulled, the variable quantity of digital dial gauge is then observed, you can detection obtains the straight line degrees of data of engine valve stem.Its
In, mating holes is horizontally disposed with, with more convenient regulation detection.
Wherein, engine valve stem positioning fixture includes the first locating piece 35 and the second locating piece of overall rectangular-blocklike structure
36, the first locating piece and the fitting of the second locating piece horizontal direction set and are fixed on bottom block and cause the upper table of the first locating piece 35
Face and the fitting side side of the second locating piece 36 form described two locating surfaces, and the detection breach 32 is by the He of the first locating piece 35
The groove of the upper surface of second locating piece 36 obtains.
So make its simple in construction, the processing and installation of conveniently positioning structure is formed, and causes the level side formed
To two locating surfaces of a vertical direction, two locating surfaces are mutually perpendicular to, and make its positioning reliably, mutual alignment relation precision can
Lean on.
Wherein, engine valve stem positioning fixture also includes the 3rd locating piece 37, and the 3rd locating piece 37 relies on screw
It is fixed on bottom block 31, the upper surface of the 3rd locating piece 37 is provided with the locating slot of the rectangular body structure of an entirety, locating slot
Ground is horizontally disposed locating piece reference plane, positions well width and the first locating piece 35 and the second locating piece 36 along perpendicular to it
The width sum for being bonded side side surface direction is consistent so that and the first locating piece 35 and the second locating piece 36 are located in locating slot, the
The bottom surface of 35 and second locating piece of a positioning block 36 and the fitting of locating piece reference plane, locating slot are located at the side position of digital dial gauge one
Overhead surface is less than the first locating piece upper surface location.
So, during assembling, it need to only rely on screw to complete the installation of the 3rd locating piece and fix, then by the first locating piece and the
Clamping loads locating slot after the fitting of two locating pieces, installs very convenient quick, and the first locating piece and the second locating piece
It rigging error, can be determined by the cooperation between the 3rd locating piece, can more facilitate and reduce mismatch error, be greatly enhanced
Accuracy of detection.
Wherein, in addition to engine valve stem pressing device, engine valve stem pressing device include an elastic component 38 and set
An applicator member 39 on elastic component 38, applicator member 39 is on the direction of two locating surface angle faces and in bullet
Property the effect of component elastic force is lower and positioning after the contact of engine valve stem peripheral surface compress.
It is so convenient to replace human hand to apply a pressure pair from the direction of two locating surface angles of face by pressing device
Engine valve stem after positioning, which is realized, to be compressed, and itself and two locating surfaces is formed linear contact lay, when so detecting operation, is manually only needed to control
System pulls engine valve stem to be axially moveable.Operator can be preferably liberated, better ensures that accuracy of detection.
Wherein, elastic component 38 is the elastic press of angularly disposed strip, and elastic press lower end is fixed on a peace
In a briquetting mounting seat loaded on bottom block, the applicator member 39 is installed in elastic press upper end.
So, it is simple in construction and quick and easy for installation, it is easy to implement.
Wherein, curved arc under being in the middle part of elastic press, extension is formed elastic press upper center forward along the length direction
There is installation rotating shaft, the applicator member 39 is the roller body being rotatably engaged in installation rotating shaft, and roller body peripheral surface is used
Compression is realized in forming point contact with engine valve stem peripheral surface after positioning.
So, rolling friction is formed to improve the smoothness of detection, while roller body as applicator member using roller body
Compared to roll structure, more facilitate while itself assemble, additionally it is possible to preferably it is convenient realize it is circumferential to engine valve stem after positioning
The point contact on surface compresses, and after formation point contact compresses, can preferably reduce influence of the compaction process itself to accuracy of detection.
Wherein, engine valve stem pressing device is two along engine valve stem length direction spacing parallel arranging setting after positioning, together
When digital dial gauge test side be just pointed between the applicator member 39 of two engine valve stem pressing devices.So, formation is located at
Two compression points of digital dial gauge both sides, can preferably keep preferably keeping balance and valve while compression
Bar moves flexibility, preferably avoids engine valve stem from beating by pressing device, improves accuracy of detection.
Wherein, the cooperation section is formed on the detection rod rear end fixed part of digital dial gauge 33, and the amesdial is consolidated
Determining structure includes the amesdial fixing screws 40 being arranged on amesdial matching seat 34 of spinning, the amesdial fixing screws
Mating holes on 40 face amesdial matching seats is set and front end is used to realize with the detection bar peripheral surface contact in mating holes
It is fixed.
So, have it is simple in construction, it is convenient to implement, and digital dial gauge being slidably matched and fixation is convenient and reliable etc. excellent
Point.
Wherein, it is fixedly installed a lengthening block on the active segment of digital dial gauge detection bar front portion forward in the axial direction
41, lengthening block front end is provided with a detection ball 42 and forms the test side.
So, it can preferably extend the length of detection bar, it is smoothly realized detection, while can be conveniently for difference
The corresponding size of the engine valve stem adjustment detection ball of model, makes it more smoothly realize detection, improves detection reliability.
Wherein, lengthen and be provided with vertical crack 43 in the middle part of the front half section of block 41 along its length, crack causes before lengthening block
It is integrally formed in the front end surface of half section of left front half section of formation and right front half section, the left front half section and right front half section and is used for and examines
Survey the detection ball mounting groove that installation is realized in the fitting of the surface of ball 42.
So, because detection ball mounting groove notch, which is generally, is equal to or slightly less than the spherical with energy of detection ball diameter
Enough clamp detection ball, therefore crack will be lengthened after block front half section is separated to form left front half section and right front half section, can rely on a left side
Front half section and the right front half section elasticity of itself, the convenient embedded installation for detecting ball.
Wherein, also there is one at the inner of crack 43 and rounded extended region space 44 is expanded to both sides.
So so that during installation detection ball, the position of left front half section and right front half section generation elastic deformation is in rear end
Extended area locus, front end recovers and remained that detection circle can be clamped after can better ensuring that detection ball installation
The state of ball, avoid left front half section and right front half section front end from producing influence of the elastic deformation to accuracy of detection, improve accuracy of detection.
Wherein, lengthening has a detection bar pilot hole set along its length in the middle part of the rear end end face of block 41, detection bar dress
Distribution front end and the extended area space 44 of crack communicate, and digital dial gauge detection bar front end movable part is fixedly mounted on detection
In bar pilot hole, and detection bar front end termination is exposed to the extended area space 44 of crack.So, detection bar can be facilitated to assemble
Assembling and alignment between hole and lengthening block, to improve accuracy of detection.
Wherein, lengthening block 41 rear end upper surface, which spins, is provided with detection bar fixing bolt 45, before detection bar fixing bolt 45
Hold and fixed for being realized with the contact of digital dial gauge detection bar front end movable part.So, it is simple in construction, and detection bar is fixed
It is convenient and reliable.
Wherein, left front half section and right front half section, which extend transversely through to spin to be provided with before, lengthens block fixing bolt 46.So, exist
After the loading of completion detection ball, it can rely on and lengthen the realization of block fixing bolt to left front half section and right front half section front end edge left and right
The limitation of propagation direction elastic deformation, thoroughly prevent it from producing influence of the elastic deformation to accuracy of detection.
The engine valve stem detection method of the present embodiment, in addition to step that engine valve stem end face run-out tolerance is detected
Suddenly；The detection of engine valve stem end face run-out tolerance is using the realization of valve stem end surface jitter detection apparatus, valve stem end surface glitch detection
Device as shown in Figure 3-4, including base 1, is provided with valve positioning fixture and valve stem end face run-out testing agency, institute on base
State valve positioning fixture to be used to realize the supporting positioning of engine valve stem in the horizontal direction, valve stem end surface glitch detection mechanism includes
One dial test indicator 21, the engine valve stem end contact after the gauge head of dial test indicator 21 is used for and positioned realize detection.
So, valve realizes support positioning, the then survey of dial test indicator lower end by bar portion on valve positioning fixture
After engine valve stem end contact after head and positioning, adjustment valve stem position to form one to the gauge head of dial test indicator lower end
Determine precompressed, dial test indicator shows initial reading, and then holding valve retainer, slowly vertical rotary valve can be from dial test indicator
Middle reading valve stem end surface run-out tolerance.
Wherein, the bar portion peripheral surface that the valve positioning fixture includes being arranged on along same level straight line on base supports
Seat 3, it is provided with bar portion peripheral surface support base 3 circumferential for carrying out the bar portion that upward support positions to bar portion peripheral surface
Surface support component, bar portion peripheral surface supporting member is used for and the side contacts of bar portion peripheral surface bottom two realize support positioning.
So, valve positioning fixture structure is simple, and positioning is convenient and swift, is realized beneficial to detection.
Wherein, two pairs of supporting sepheres 5 that the bar portion peripheral surface supporting member is set including equivalent and horizontal pair, two
Supporting sephere 5 is arranged at intervals and each medium position is in same level rectilinear direction, two branch in each pair supporting sephere 5
The spheroid opposite side first half is supportted to be used to realize support positioning with the contact of bar portion peripheral surface.
So, realize to contact bar portion peripheral surface using two pairs of supporting sepheres being arranged in pairs and support, such bar portion and
Supporting member is in point contact, can at utmost be avoided because the irregular of bar portion itself causes axial line during rotation not exist
On straight line and then increase detection error, improve detection accuracy.It can ensure stability of strutting system using two pairs of supporting sepheres.
V-arrangement locating piece can also be used to realize the support positioning of bar portion when implementing certainly, but this structure is two locating surfaces and bar portion
Contact, if bar itself circle is irregular, or locating surface itself flatness is inadequate, there is no axial line when can cause the bar portion to rotate
Point-blank, and then detection error is caused to increase.
Wherein, two pairs of supporting sepheres 5 are separately positioned on an independent bar portion peripheral surface support base 3, and lever thousand divides
Table 21 is arranged on the linear position between two pairs of supporting sepheres.Material is more so saved relative to using a support base,
Convenient support load, while beneficial to the position between two pairs of supporting sepheres of regulation with more convenient detection.
Wherein, the upper center of bar portion peripheral surface support base 3 is provided with the rectangular supporting sephere mounting groove in horizontal cross-section,
Supporting sephere 5 is paired to be arranged in supporting sephere mounting groove, and two paired supporting sepheres are affixed setting and two support balls
The surrounding of body and mounting groove is affixed setting.So, two equivalent supporting sepheres need to be only put into supporting sephere mounting groove,
It can be automatically positioned without adjustment and be affixed state in level, installed and used efficient and convenient in the extreme.
Wherein, bar portion pressure exerting arrangement, the bar portion pressure exerting arrangement bag are additionally provided with any bar portion peripheral surface support base
A flexure strip 6 is included, the one end of flexure strip 6 is fixed on bar portion peripheral surface support base, and the other end is provided with positioned at two pairs of supports
Compressing member above spheroid intermediate connection, the bar portion upper surface after compressing member is used for and positioned press.
So, a pressure is applied to bar portion upper surface using simple structure, can prevented in detection process, human hand band
The excessive or force that exerted a force during dynamic valve rotation is unbalanced and causes bar portion bounce displacement, better assures that accuracy of detection is reliable.
Wherein, the compressing member is a roll sleeve 7 being installed in rotation on flexure strip, the axis direction of roll sleeve 7 and peace
It is consistent to set the bar portion axis direction behind position.So, roll and rub both when reducing compressing member and bar portion contact area, while detecting
Wipe, can preferably reduce influence of the compressing member to detection.
Wherein, valve stem end surface glitch detection mechanism also includes a bar portion end face positioning seat 4, bar portion end face positioning seat 4
On be provided with and carry out spacing bar portion end face limit component for being offseted with bar portion end face；Bar portion end face limit component is a water
The flat push rod 8 set, the one end of push rod 8 have the top and top end face circle home position for being used for and positioning rear rod portion of cone
Contact spacing；The dial test indicator 21 is fixed on the push rod 8, and the gauge head of dial test indicator 21 is located at push rod top
Front side adjacent of the point using bar portion end face radius of circle as the circle location of radius.
So, it is spacing by the round heart contact in top and bar portion end face, it is ensured that to realize to valve stem axial direction
It is spacing, avoid during rotary pneumatic door rod due to causing axial displacement when exerting a force uneven and then testing result is impacted.And
More importantly the position limiting structure can better ensure that bar portion rotary course axis line position is constant, therefore also not interfere with thick stick
Detection of the bar amesdial to bar portion end face run-out, therefore better assure that accuracy of detection.
Dial test indicator mounting seat 22 is provided with the push rod 8, is horizontally disposed with the dial test indicator mounting seat 22
There is push rod pilot hole, be provided with push rod below push rod pilot hole straight down and clamp seam, the lever thousand that push rod clamps seam side divides
Mounting seat fixing bolt 23 is provided with table mounting seat 22, mounting seat fixing bolt 23 laterally slidably extends through push rod and clamps seam
The dial test indicator mounting seat and screw thread of side are rotatably connected in the screwed hole that push rod is clamped on seam opposite side inwall, dial test indicator
Mounting seat 22 is slidably fit on push rod 8 by push rod pilot hole and rotary mounting seat fixing bolt can be relied on to realize admittedly
It is fixed；The dial test indicator is fixedly mounted on dial test indicator upper surface.
So, axial location of the regulation dial test indicator on push rod can preferably be facilitated so that dial test indicator
Gauge head can be precisely located at the top front side adjacent using bar portion end face radius of circle as the circle location of radius of push rod, with suitable
Profit realizes detection.
Wherein, a push rod mounting post 9 is provided with the positioning seat of bar portion end face straight up, push rod 8 is horizontal through top
One push rod mounting hole on bar mounting post top, push rod mounting post top are also connected with a push rod fixing bolt, and push rod is fixed
Push rod in bolt front end and push rod mounting hole abuts the fixation for realizing push rod.So, can be easily before installation and adjustment push rod
Position afterwards.
Wherein, the vertical push rod mounting post that the grafting of push rod mounting post lower end is arranged on the positioning seat of bar portion end face is inserted
In hole, also face push rod mounting post jack is horizontal through push rod mounting post bolt is connected with the positioning seat of bar portion end face, pushes up
Bar mounting post bolt front end and push rod mounting post, which abut, fixes.So, convenient regulation push rod mounting post upper-lower position, and then
Push rod height and position is adjusted, is ensured when need to only design production in the middle part of push rod axial line and two pairs of supporting sepheres in same vertical flat
In face, you can it is fixed to adjust the round heart contact in the bar portion end face after the top of push rod and positioning more conveniently when mounted
Position.
Wherein, base upper surface is provided with dovetail groove 10, the He of bar portion peripheral surface support base 3 along valve orientation
The lower end of bar portion end face positioning seat 4 is each vertically provided with the fixture block matched with dovetail groove 10 and is slidably fit into dovetail groove,
It is each also vertical on bar portion peripheral surface support base and bar portion end face positioning seat to be provided with support base fixing bolt reality through spinning
Now it is locked.
So, the mutual distance between two bar portion peripheral surface support bases of convenient regulation and bar portion end face positioning seat, with
It is convenient to realize detection.
Claims (10)
1. a kind of engine valve stem detection method, engine valve stem Linearity surveying is realized using digital dial gauge in this method, it is special
Sign is, during engine valve stem Linearity surveying, engine valve stem to be detected is positioned to two locating surfaces of two sections of location structures
On, then pushing down engine valve stem makes it form the linear contact lay along two parallel lines, two sections of location structures with two locating surfaces respectively
Between reserve detection breach for detection, its test side is made from detection gap position and engine valve stem week using digital dial gauge
Contacted to surface and produce certain precompressed amount, then fix digital dial gauge；Now keep engine valve stem and two positioning
While the linear contact lay in face, engine valve stem is pulled along engine valve stem length direction, then observes the variable quantity of digital dial gauge, i.e.,
Detection obtains the straight line degrees of data of engine valve stem.
2. engine valve stem detection method as claimed in claim 1, it is characterised in that using engine valve stem linearity testing apparatus
Engine valve stem Linearity surveying is realized, engine valve stem linearity testing apparatus includes bottom block, valve stem is provided with bottom block
Portion's positioning fixture and engine valve stem straightness detection mechanism, the engine valve stem positioning fixture include two sections of length directions of following wind one
The location structure of setting, every section of location structure include two intersecting locating surfaces in angle, two positioning of two location structures
Face each can be used in the linear contact lay formed with valve stem on same straight line, and the position between two sections of location structures is formed with one
Detect breach；The engine valve stem straightness detection mechanism includes an engine valve stem Linearity surveying digital dial gauge, number
Word amesdial has a horizontally disposed cooperation section, coordinates section to coordinate on an amesdial matching seat of bottom block is arranged at
Mating holes in, described to be slidably matched along what digital dial gauge detection bar length direction slided with being combined into be capable of, amesdial coordinates
The amesdial fixed structure that engine valve stem Linearity surveying is fixed with digital dial gauge, thousand points of numeral are additionally provided with seat
Valve stem direction of axis line and face detection gap position of the table detection bar after positioning are set, and digital dial gauge detects
Formed with a test side, the contact of valve stem peripheral surface, which is realized, after the test side is used for and positioned detects for bar front end.
3. engine valve stem detection method as claimed in claim 2, it is characterised in that engine valve stem positioning fixture includes entirety and is in
The first locating piece and the second locating piece of rectangular block shape structure, the first locating piece and the fitting of the second locating piece horizontal direction are set simultaneously
Fitting side side fixed on bottom block so that the first locating piece upper surface and the second locating piece forms described two locating surfaces,
The detection breach is obtained by the groove of the first locating piece and the second locating piece upper surface.
4. engine valve stem detection method as claimed in claim 3, it is characterised in that engine valve stem positioning fixture also includes one
3rd locating piece, the 3rd locating piece are fixed on bottom block by screw, the 3rd locating piece upper surface be provided with one it is whole
The locating slot of the rectangular body structure of body, locating slot ground are horizontally disposed locating piece reference plane, position well width and first and determine
Position block and the second locating piece are consistent along the width sum of side side surface direction is bonded perpendicular to it so that the first locating piece and second is determined
Position block is located in locating slot, and the first locating piece and the second locating piece bottom surface and the fitting of locating piece reference plane, locating slot is positioned at number
The overhead surface of the side position of word amesdial one is less than the first locating piece upper surface location.
5. engine valve stem detection method as claimed in claim 2, it is characterised in that also including engine valve stem pressing device, gas
Door rod portion pressing device includes an elastic component and an applicator member being arranged on elastic component, and applicator member is located at two
Engine valve stem peripheral surface contact on the direction of individual locating surface angle face and under the effect of elastic component elastic force and after positioning
Compress.
6. engine valve stem detection method as claimed in claim 5, it is characterised in that curved arc under being in the middle part of elastic press,
Elastic press upper center extends forward formed with installation rotating shaft along the length direction, and the applicator member is to be rotatably engaged
Roller body in rotating shaft is installed, engine valve stem peripheral surface forms point contact and realizes pressure after roller body peripheral surface is used for and positioned
Tightly.
7. engine valve stem detection method as claimed in claim 2, it is characterised in that the cooperation section is formed at digital dial gauge
Detection rod rear end fixed part on, the amesdial fixed structure includes be arranged on amesdial matching seat one thousand of spinning
Point table fixing screws, the mating holes on the amesdial fixing screws face amesdial matching seat is set and front end is used for and coordinated
Detection bar peripheral surface contact in hole, which is realized, to be fixed.
8. engine valve stem detection method as claimed in claim 2, it is characterised in that digital dial gauge detection bar front portion active segment
On be fixedly installed a lengthening block forward in the axial direction, lengthen block front end and be provided with a detection ball and form the detection
End.
9. engine valve stem detection method as claimed in claim 8, it is characterised in that lengthen in the middle part of block front half section along its length
Vertical crack is provided with, crack make it that lengthening block front half section forms left front half section and right front half section, the left front half section and the right side
The detection ball mounting groove for realizing installation with detection ball surface fitting is integrally formed in the front end surface of front half section.
10. engine valve stem detection method as claimed in claim 1, it is characterised in that also include to engine valve stem end face run-out
The step of tolerance is detected, the detection of engine valve stem end face run-out tolerance is using the realization of valve stem end surface jitter detection apparatus, institute
Stating valve stem end surface jitter detection apparatus includes base, and valve positioning fixture and the detection of valve stem end face run-out are provided with base
Mechanism, the valve positioning fixture are used to realize the supporting positioning of engine valve stem in the horizontal direction, valve stem end surface glitch detection
Mechanism includes a dial test indicator, and the engine valve stem end contact after the gauge head of dial test indicator is used for and positioned realizes inspection
Survey；The valve positioning fixture includes the bar portion peripheral surface support base being arranged on along same level straight line on base, bar portion week
It is provided with to surface support seat and supports structure for carrying out the bar portion peripheral surface that upward support positions to bar portion peripheral surface
Part, bar portion peripheral surface supporting member is used for and the side contacts of bar portion peripheral surface bottom two realize support positioning.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710576048.0A CN107388943B (en) | 2017-07-14 | 2017-07-14 | A kind of engine valve stem detection method |
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| CN201710576048.0A CN107388943B (en) | 2017-07-14 | 2017-07-14 | A kind of engine valve stem detection method |
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