CN107388943B - A kind of engine valve stem detection method - Google Patents

A kind of engine valve stem detection method Download PDF

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Publication number
CN107388943B
CN107388943B CN201710576048.0A CN201710576048A CN107388943B CN 107388943 B CN107388943 B CN 107388943B CN 201710576048 A CN201710576048 A CN 201710576048A CN 107388943 B CN107388943 B CN 107388943B
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CN
China
Prior art keywords
valve stem
engine valve
detection
positioning
locating piece
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Expired - Fee Related
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CN201710576048.0A
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Chinese (zh)
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CN107388943A (en
Inventor
张军
彭程
李世春
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Yangtze Normal University
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Yangtze Normal University
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Priority to CN201710576048.0A priority Critical patent/CN107388943B/en
Publication of CN107388943A publication Critical patent/CN107388943A/en
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Publication of CN107388943B publication Critical patent/CN107388943B/en
Expired - Fee Related legal-status Critical Current
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00Measuring arrangements characterised by the use of mechanical means
    • G01B5/24Measuring arrangements characterised by the use of mechanical means for measuring angles or tapers; for testing the alignment of axes
    • G01B5/25Measuring arrangements characterised by the use of mechanical means for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
    • G01B5/252Measuring arrangements characterised by the use of mechanical means 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

Abstract

The invention discloses a kind of engine valve stem detection methods, it is characterized in that, when detection, engine valve stem to be detected is positioned on two positioning surfaces of two sections of location structures, then pushing down engine valve stem makes it form the line contact along two parallel lines with two positioning surfaces respectively, the detection notch for detection is reserved between two sections of location structures, so that its test side is contacted and generate certain precompressed amount from detection gap position and engine valve stem peripheral surface using digital dial gauge, then fixes digital dial gauge;While keeping the contact of the line of engine valve stem and two positioning surfaces at this time, engine valve stem is pulled along engine valve stem length direction, then observes the variable quantity of digital dial gauge, is i.e. detection obtains the straightness data of engine valve stem.The present invention, which has, to be implemented simply, easy to operate, can be realized the detection of engine valve stem straightness, and is further able to realize the detection of engine valve stem end face run-out tolerance, while the feature that testing result is accurate and reliable.

Description

A kind of engine valve stem detection method
Technical field
Part of automobile engine production detection technique field of the present invention more particularly to a kind of engine valve stem detection method.
Background technique
Automobile engine can be converted into mechanical energy by the chemical energy of fuel or by other forms, provide for automobile dynamic Power is the heart of automobile, belongs to a kind of technology-intensive product.With China's expanding economy, to automobile demand amount and day While all increasings, auto industry is rapidly developed, and people are also higher and higher to the performance requirement of automobile engine.
In automobile engine, inlet and exhaust valve is to be coaxially disposed the bar portion being integrated with round plate by a round plate and one The component of composition belongs to one of automobile engine key components and parts, is the portal of engine chamber, is engine working process The key foundation part of middle sealing porting controls the gas exchanges of engine for blocking airflow channel.In engine In each course of work, intake and exhaust valves 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.Intake and exhaust valves play close especially in compression and expansion stroke Seal the effect of combustion chamber.Therefore, the quality of valve quality has important influence to engine performance and service life.
The machining accuracy and structure of valve play the role of to the movement of engine valve actuating mechanism it is very important, while wherein The bar portion of valve is the key position of valve, it is both design basis and technique and detection benchmark, it is almost all 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 factor influence of the quality cubing related to accuracy detection vulnerable to operator, is easy 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 of continuous improvement.
Engine valve stem refers to that a part to work in valve guide bushing, the quality of bar portion straightness directly affect gas The normal work of door.In process of factory production, engine valve stem straightness has the technique being straightened to it to be guaranteed.And In existing valve manufacturing enterprise, some valve manufacturing enterprises carry out engine valve stem straightness mainly by universal tool-measuring microscope Detection.Because of its inspection cost height, required time is long, therefore examines engine valve stem straightness and number and batch very limited, directly It connects and thinks to have the technique of alignment to be guaranteed.Enterprise without universal tool-measuring microscope typically no examines this project It surveys.Whether valve stem end surface is smooth simultaneously, and one of an important factor for influence valve assembly precision, existing manufacturing enterprise is to bar End face run-out mainly uses end face run-out instrument to be detected, and it is larger that there are equipment, higher cost, and occupied spatial volume is big equal scarce It falls into, seriously improves the production cost of enterprise.
Therefore it is simple how to design a kind of structure, and it is easy to operate, reliable engine valve stem detection method is detected to realize Detection to engine valve stem data, becoming has considered solve the problems, such as.
Summary of the invention
The technical problem to be solved in the present invention is that: how to provide it is a kind of implement it is simple, it is easy to operate, can be realized The detection of engine valve stem straightness, can be realized 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 the following technical solutions.
A kind of engine valve stem detection method realizes engine valve stem Linearity surveying using digital dial gauge in this method, It is characterized in that, when 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 line contact along two parallel lines, two sections of positioning knots with two positioning surfaces respectively The detection notch for detection is reserved between structure, makes its test side from detection gap position and engine valve stem using digital dial gauge Peripheral surface contacts and generates certain precompressed amount, then fixes digital dial gauge;Keep engine valve stem and two fixed at this time While the line contact 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 straightness data of engine valve stem.
In this way, being to form each two lines contact with location structure when detection, at left and right sides of engine valve stem test point position Positioning, this avoid surface of position out-of-flatnesses at valve stem positioning to influence caused by Linearity surveying, improves detection Precision and reliability.
In this method, realize that engine valve stem Linearity surveying, engine valve stem are straight using engine valve stem linearity testing apparatus Dimension detection device includes bottom block, which is characterized in that is provided with engine valve stem positioning fixture on bottom block and engine valve stem is straight Dimension testing agency, the engine valve stem positioning fixture include the location structure of two sections of one length directions of following wind setting, and every section fixed Bit architecture includes the positioning surface that two intersections are in angle, and two positioning surfaces of two location structures respectively can be used in and valve stem The line contact on same straight line is formed, the position between two sections of location structures is formed with a detection notch;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 set, cooperation section cooperation are described with being combined into the matching hole on an amesdial matching seat for being set to bottom block It can be slidably matched along what digital dial gauge detection bar length direction slided, be additionally provided on amesdial matching seat to engine valve stem The amesdial fixed structure that Linearity surveying is fixed with digital dial gauge, after digital dial gauge detection bar is perpendicular to 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, detection is realized in the contact of valve stem peripheral surface after which is used for and positions.
In this way, engine valve stem to be detected can be positioned on two positioning surfaces of two sections of location structures, so when detection After push down engine valve stem it made to form lines contact with two positioning surfaces respectively, then adjust digital dial gauge position, make its test side It is contacted from detection gap position and engine valve stem peripheral surface and generates certain precompressed amount, then rely on amesdial fixed structure Fix digital dial gauge.While keeping the contact of the line of engine valve stem and two positioning surfaces at this time, along engine valve stem length side To engine valve stem is pulled, the variable quantity of digital dial gauge is then observed, can be detected the straightness data for obtaining engine valve stem;This Sample is the positioning that each two lines contact is formed with location structure when detection, at left and right sides of engine valve stem test point position, in this way Surface of position out-of-flatness influence caused by Linearity surveying at valve stem positioning is avoided, detection accuracy and reliable is improved Property.Therefore have structure simple, easy to operate, the high feature of detection accuracy.Wherein matching hole is horizontally disposed, with more convenient adjusting Detection.
As optimization, engine valve stem positioning fixture includes the first locating piece and the second positioning of whole rectangular-blocklike structure Block, the first locating piece and the fitting of the second locating piece horizontal direction, which are arranged and are fixed on bottom block, makes the first locating piece upper surface Described two positioning surfaces are formed with the fitting side side of the second locating piece, the detection notch is positioned by the first locating piece and second The groove of block upper surface obtains.
Make its structure simple in this way, the processing and installation of conveniently positioning structure is formed, and makes to be formed level side To two positioning surfaces of a vertical direction, two positioning surfaces are mutually perpendicular to, and keep its positioning reliable, mutual alignment relation precision can It leans on.
As optimization, engine valve stem positioning fixture further includes a third locating piece, and the third locating piece relies on screw It is fixed on bottom block, third locating piece upper surface is provided with the locating slot that an entirety is in cuboid structure, locating slot ground For horizontally disposed locating piece datum level, groove width and the first locating piece and the second locating piece are positioned along perpendicular to it and is bonded side side The sum of the width 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 the Two bottom surface of positioning block and the fitting of locating piece datum level, locating slot are located at the overhead surface of one side position of digital dial gauge lower than first Locating piece upper surface location.
In this way, need to only be fixed by the installation that screw completes third locating piece when assembly, then by the first locating piece and the Clamping is packed into locating slot after the fitting of two locating pieces, installs very convenient quick, and the first locating piece and the second locating piece Rigging error can determine by the cooperation between third locating piece, can more convenient reduction mismatch error, greatly improve Detection accuracy.
It further include engine valve stem pressing device as optimization, engine valve stem pressing device includes an elastic component and sets An applicator member on elastic component is set, applicator member is located on the direction of two positioning surface angle faces and in elastic structure Engine valve stem peripheral surface under the effect of part elastic force and after positioning, which contacts, to be compressed.
Facilitate in this way and replaces manpower to apply a pressure pair from the direction of two positioning surface angles of face by pressing device Engine valve stem after positioning, which is realized, to be compressed, and when itself and two positioning surfaces being made to form line contact, in this way detection operation, manually only needs to control System pulls engine valve stem to be axially moveable.Operator can be preferably liberated, better ensures that detection accuracy.
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 base of bottom block, the applicator member is installed in elastic press upper end.
In this way, structure is simple 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 It is formed with installation shaft, the applicator member is the roller body being rotatably engaged in installation shaft, roller body peripheral surface Compression is realized for forming point contact with engine valve stem peripheral surface after positioning.
In this way, forming rolling friction using roller body as applicator member to improve the smoothness of detection, while roller body Compared to roll structure, while itself more convenient assembly, additionally it is possible to preferably facilitate realization circumferential to engine valve stem after positioning The point contact on surface compresses, and after forming point contact compression, can preferably reduce influence of the compaction process itself to detection accuracy.
Further, engine valve stem pressing device is along engine valve stem length direction spacing parallel arranging is arranged after positioning two It is a, while digital dial gauge test side face is located between the applicator member of two engine valve stem pressing devices.In this way, forming position It is gentle also to can be better maintained balance for two compression points in digital dial gauge two sides while capable of preferably keeping compression Door rod moves flexibility, preferably avoids engine valve stem from beating by pressing device, improves detection accuracy.
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 that are screwed on, and the amesdial fixing screws are just To on amesdial matching seat matching hole setting and front end be used for and matching hole in detection bar peripheral surface contact realize fix.
In this way, having structure simple, facilitate implementation, and digital dial gauge be slidably matched and fix it is convenient and reliable etc. excellent Point.
As optimization, it is fixedly installed a lengthening on the active segment of digital dial gauge detection bar front forward in the axial direction Block, lengthening block front end are provided with a detection ball and form the test side.
In this way, can preferably extend the length of detection bar, it is made smoothly to realize detection, while can be convenient for difference The correspondence size of the engine valve stem adjustment detection ball of model, makes it more smoothly realize detection, improves detection reliability.
It as optimization, lengthens and is provided with vertical crack in the middle part of block front half section along its length, crack makes 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.
In this way, 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 lengthen after block front half section is separated to form left front half section and right front half section, it can be by a left side The elasticity of front half section and right front half section itself facilitates the insertion installation of detection ball.
Also there is one rounded extended region space is expanded to two sides as optimization, at crack inner end.
In this way, the position of left front half section and right front half section generation flexible deformation is in rear end when making installation detection ball Extended area spatial position, front end restores and remains that detection circle can be clamped after capable of better ensuring that detection ball installation The state of ball avoids left front half section and right front half section front end from generating influence of the flexible deformation to detection accuracy, improves detection accuracy.
Further, lengthening has a detection bar pilot hole being arranged along its length, detection bar in the middle part of block rear end face 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 end is exposed to the extended area space of crack.In this way, can be convenient detection bar pilot hole And the assembly and alignment between block are lengthened, to improve detection accuracy.
Further, lengthening block rear end upper surface, which is screwed on, is provided with detection bar fixing bolt, detection bar fixing bolt front end Fixation is realized for contacting with digital dial gauge detection bar front end movable part.In this way, structure is simple, 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 be screwed on to be provided with before, lengthens block fixing bolt.In this way, After the loading for completing detection ball, it can realize to left front half section and right front half section front end by block fixing bolt is lengthened along a left side The limitation of right propagation direction flexible deformation thoroughly prevents it from generating influence of the flexible deformation to detection accuracy.
Further, engine valve stem detection method of the invention further includes examining to engine valve stem end face run-out tolerance 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 pedestal, and valve positioning fixture and valve stem end face run-out testing agency are provided on pedestal, described Bearing positioning of the valve positioning fixture for realizing engine valve stem in the horizontal direction, valve stem end surface glitch detection mechanism includes one Detection is realized in engine valve stem end face contact after the gauge head of a dial test indicator, dial test indicator is used for and positions;The valve Positioning fixture includes the bar portion peripheral surface support base being set on the base along same level straight line, bar portion peripheral surface support base On be provided with bar portion peripheral surface supporting member for carrying out upward support positioning to bar portion peripheral surface, bar portion circumferential direction table Face supporting member is used for and two side contacts of bar portion peripheral surface lower part realize support positioning.
In this way, valve stem end surface glitch detection dress can also be further relied on after realizing engine valve stem Linearity surveying Set the detection for realizing engine valve stem end face run-out tolerance.When detection, valve realizes support by bar portion on valve positioning fixture Positioning, after then the gauge head of dial test indicator lower end and the engine valve stem end face after positioning contact, adjustment valve stem position makes 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 efficient, is conducive to detection and realizes.
As optimization, the bar portion peripheral surface supporting member includes two pairs of support balls of equivalent and horizontal pair setting Body, two pairs of supporting sephere intervals are arranged and respectively medium position is in same level rectilinear direction, two in each pair of supporting sephere A supporting sephere opposite side upper half is used for and support positioning is realized in the contact of bar portion peripheral surface.
Supported in this way, realizing to contact bar portion peripheral surface using two pairs of supporting sepheres being arranged in pairs, such bar portion and Supporting member is to be in point contact, and can utmostly avoid causing axial line when rotation not exist due to the irregular of bar portion itself On straight line and then increase detection error, improves detection accuracy.It can guarantee stability of strutting system using two pairs of supporting sepheres. The support positioning of bar portion can also be realized when implementing certainly using V-arrangement locating piece, but this structure is two positioning surfaces and bar portion Contact, if bar itself circle itself flatness of irregular or positioning surface is inadequate, there is no axial line when will lead to bar portion rotation 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 to table to be set on the linear position between two pairs of supporting sepheres.Material is more saved relative to using a support base in this way, Facilitate support load, while being conducive to adjust the position between two pairs of supporting sepheres with more convenient detection.
Further, bar portion peripheral surface support base upper center is provided with horizontal cross-section and installs in the supporting sephere of rectangle Slot, supporting sephere is pairs of to be mounted in supporting sephere mounting groove, and two pairs of supporting sepheres are affixed setting and two supports The surrounding of sphere and mounting groove is affixed setting.In this way, 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 on any bar portion peripheral surface support base Structure includes an elastic piece, and elastic piece 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 sphere intermediate connection is supportted, the bar portion upper surface contact after compressing member is used for and positions presses.
In this way, applying a pressure to bar portion upper surface using simple structure, can prevent in detection process, manpower band The excessive or force that exerts a force when dynamic valve rotation is unbalanced and leads to bar portion bounce displacement, better assures that detection accuracy is reliable.
Further, the compressing member is a roll sleeve being installed in rotation on elastic piece, roll sleeve axis direction and Bar portion axis direction after installation positioning is consistent.It is rolled both in this way, reduce compressing member and bar portion contact area, while when detecting Friction, can preferably reduce influence of the compressing member to detection.
Further, valve stem end surface glitch detection mechanism further includes a bar portion end face positioning seat, the positioning of bar portion end face It is provided on seat for the bar portion end face limit component limited that offsets with bar portion end face;Bar portion end face limit component is one Horizontally disposed mandril, mandril one end have the top and top end face circle center location for being used for and positioning rear rod portion of cone Contact limit;The dial test indicator is fixed on the mandril, and the gauge head of dial test indicator be located at mandril it is top with Bar portion end face radius of circle is the front side adjacent of the circle location of radius.
In this way, by the round heart contact limit in top and bar portion end face, it is ensured that realize to valve stem axial direction Limit avoids when rotary pneumatic door rod due to causing axial displacement when force is uneven and then impacting to testing result.And More importantly the position limiting structure can better ensure that bar portion rotary course axis line position is constant, therefore will not influence thick stick Detection of the bar amesdial to bar portion end face run-out, therefore better assure that detection accuracy.
Dial test indicator mounting base is provided on the mandril, being horizontally disposed in the dial test indicator mounting base has mandril Pilot hole, mandril pilot hole lower section are provided with mandril straight down and clamp seam, and the dial test indicator that mandril clamps seam side is installed Mounting base fixing bolt is provided on seat, mounting base fixing bolt laterally slidably extends through the lever thousand that mandril clamps seam side Divide table mounting base and screw thread is rotatably connected in the threaded hole that mandril clamps on seam other side inner wall, dial test indicator mounting base, which relies on, pushes up Bar pilot hole is slidably fit on mandril and can realize by rotary mounting seat fixing bolt and fixes;The lever thousand divides Table is fixedly mounted on dial test indicator upper surface.
In this way, can preferably facilitate the axial position for adjusting dial test indicator on mandril, so that dial test indicator It is top using bar portion end face radius of circle as the front side adjacent of the circle location of radius that gauge head can be precisely located at mandril, with suitable Benefit realizes detection.
Further, be arranged vertically upwards a mandril mounting post on the positioning seat of bar portion end face, mandril level through One mandril mounting hole on mandril mounting post top, mandril mounting post top are also screwed with a mandril fixing bolt, and mandril is solid The mandril determined in bolt front end and mandril mounting hole abuts the fixation for realizing mandril.In this way, can be convenient ground installation and adjustment mandril Front-rear position.
Further, the vertical mandril installation that the grafting of mandril mounting post lower end is mounted on the positioning seat of bar portion end face Face mandril mounting post jack level, which is gone back, in column jack, on the positioning seat of bar portion end face positions spiral shell through mandril mounting post is screwed with Bolt, mandril mounting post positioning bolt front end and mandril mounting post, which abut, fixes.Bottom in mandril mounting post is adjusted in this way, facilitating It sets, and then adjusts mandril height and position, guarantee in the middle part of mandril axial line and two pairs of supporting sepheres when need to only design production in same The round heart in bar portion end face in one vertical plane, after the top of mandril and positioning can be adjusted more conveniently during installation Contact positioning.
As optimization, base upper surface is provided with dovetail groove, the bar portion peripheral surface support base along valve orientation It is respectively vertically provided with bar portion end face positioning seat lower end and is slidably fit into dovetail groove with the matched fixture block of dovetail groove, bar It is respectively 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 being screwed on It is locked.
In this way, facilitate the mutual distance adjusted between two bar portion peripheral surface support bases and bar portion end face positioning seat, with Realization is facilitated to detect.
Implement simply in conclusion the present invention has, it is easy to operate, it can be realized the inspection of engine valve stem straightness It surveys, and is further able to realize the detection of engine valve stem end face run-out tolerance, while the feature that testing result is accurate and reliable.
Detailed description of the invention
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 Schematic diagram.
Fig. 2 is the schematic perspective view of Fig. 1.
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 Schematic diagram.
Fig. 4 is the schematic perspective view of Fig. 3.
Specific 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 realizes engine valve stem Linearity surveying using digital dial gauge in this method, It is characterized in that, when 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 line contact along two parallel lines, two sections of positioning knots with two positioning surfaces respectively The detection notch for detection is reserved between structure, makes its test side from detection gap position and engine valve stem using digital dial gauge Peripheral surface contacts and generates certain precompressed amount, then fixes digital dial gauge;Keep engine valve stem and two fixed at this time While the line contact 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 straightness data of engine valve stem.In this way, being at left and right sides of engine valve stem test point position and determining when detection Bit architecture forms the positioning of each two lines contact, and this avoid surface of position out-of-flatnesses at valve stem positioning to Linearity surveying Caused by influence, improve detection accuracy and reliability.
Specifically, realizing the inspection of engine valve stem straightness using engine valve stem linearity testing apparatus in present embodiment It surveys, engine valve stem linearity testing apparatus is as shown in Figs. 1-2, including bottom block 31, it is characterized in that, it is provided on bottom block 31 Engine valve stem positioning fixture and engine valve stem straightness detection mechanism, the engine valve stem positioning fixture include that two sections of following winds one are long Spend direction setting location structure, every section of location structure include two intersection be in angle positioning surfaces, the two of two location structures A positioning surface respectively can be used in the line formed on same straight line with valve stem contact, and the position between two sections of location structures is formed There is a detection notch 32;The engine valve stem straightness detection mechanism includes engine valve stem Linearity surveying number thousand Divide table 33, digital dial gauge 33 has a cooperation section, and the cooperation of cooperation section is in the amesdial cooperation for being set to bottom block 31 Seat 34 on matching hole in, it is described be combined into be capable of along digital dial gauge detection bar length direction sliding being slidably matched, thousand points The amesdial fixed structure that engine valve stem Linearity surveying is fixed with digital dial gauge is additionally provided on table matching seat 34, Digital dial gauge detection bar is perpendicular to the valve stem direction of axis line after positioning and face detection 32 position of notch is arranged, and number Amesdial detection bar front end is formed with a test side, and inspection is realized in the contact of valve stem peripheral surface after which is used for and positions It surveys.
In this way, engine valve stem to be detected can be positioned on two positioning surfaces of two sections of location structures, so when detection After push down engine valve stem it made to form lines contact with two positioning surfaces respectively, then adjust digital dial gauge position, make its test side It is contacted from detection gap position and engine valve stem peripheral surface and generates certain precompressed amount, then rely on amesdial fixed structure Fix digital dial gauge.While keeping the contact of the line of engine valve stem and two positioning surfaces at this time, along engine valve stem length side To engine valve stem is pulled, the variable quantity of digital dial gauge is then observed, can be detected the straightness data for obtaining engine valve stem.Its In, matching hole is horizontally disposed, with more convenient adjusting detection.
Wherein, engine valve stem positioning fixture includes the first locating piece 35 and the second locating piece of whole rectangular-blocklike structure 36, the first locating piece and the second locating piece horizontal direction are bonded to be arranged and be fixed on bottom block and make table on the first locating piece 35 Face and the fitting side side of the second locating piece 36 form described two positioning surfaces, and the detection notch 32 is by 35 He of the first locating piece The groove of second locating piece, 36 upper surface obtains.
Make its structure simple in this way, the processing and installation of conveniently positioning structure is formed, and makes to be formed level side To two positioning surfaces of a vertical direction, two positioning surfaces are mutually perpendicular to, and keep its positioning reliable, mutual alignment relation precision can It leans on.
Wherein, engine valve stem positioning fixture further includes a third locating piece 37, and the third locating piece 37 relies on screw It is fixed on bottom block 31,37 upper surface of third locating piece is provided with the locating slot that an entirety is in cuboid structure, locating slot Ground is horizontally disposed locating piece datum level, positions groove width and the first locating piece 35 and the second locating piece 36 along perpendicular to it It is consistent to be bonded the sum of width of side side surface direction, so that the first locating piece 35 and the second locating piece 36 are located in locating slot, the A positioning block 35 and 36 bottom surface of the second locating piece and the fitting of locating piece datum level, locating slot are located at one side position of digital dial gauge Overhead surface is lower than the first locating piece upper surface location.
In this way, need to only be fixed by the installation that screw completes third locating piece when assembly, then by the first locating piece and the Clamping is packed into locating slot after the fitting of two locating pieces, installs very convenient quick, and the first locating piece and the second locating piece Rigging error can determine by the cooperation between third locating piece, can more convenient reduction mismatch error, greatly improve Detection accuracy.
It wherein, further include engine valve stem pressing device, engine valve stem pressing device includes an elastic component 38 and setting An applicator member 39 on elastic component 38, applicator member 39 are located on the direction of two positioning surface angle faces and in bullet Property engine valve stem peripheral surface after the effect of component elastic force is lower and positioning contact and compress.
Facilitate in this way and replaces manpower to apply a pressure pair from the direction of two positioning surface angles of face by pressing device Engine valve stem after positioning, which is realized, to be compressed, and when itself and two positioning surfaces being made to form line contact, in this way detection operation, manually only needs to control System pulls engine valve stem to be axially moveable.Operator can be preferably liberated, better ensures that detection accuracy.
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 base loaded on bottom block, the applicator member 39 is installed in elastic press upper end.
In this way, structure is simple and quick and easy for installation, it is easy to implement.
Wherein, curved arc, elastic press upper center extend to form forward along the length direction under being in the middle part of elastic press There is installation shaft, the applicator member 39 is the roller body being rotatably engaged in installation shaft, and roller body peripheral surface is used Compression is realized in forming point contact with engine valve stem peripheral surface after positioning.
In this way, forming rolling friction using roller body as applicator member to improve the smoothness of detection, while roller body Compared to roll structure, while itself more convenient assembly, additionally it is possible to preferably facilitate realization circumferential to engine valve stem after positioning The point contact on surface compresses, and after forming point contact compression, can preferably reduce influence of the compaction process itself to detection accuracy.
Wherein, engine valve stem pressing device is along engine valve stem length direction spacing parallel arranging is arranged after positioning two, together When digital dial gauge test side face be located between the applicator member 39 of two engine valve stem pressing devices.It is located in this way, being formed Two compression points of digital dial gauge two sides, also can be better maintained balance and valve while capable of preferably keeping compression Bar moves flexibility, preferably avoids engine valve stem from beating by pressing device, improves detection accuracy.
Wherein, the cooperation section is formed on the detection rod rear end fixed part of digital dial gauge 33, and the amesdial is solid Determining structure includes the amesdial fixing screws 40 being arranged on amesdial matching seat 34 that are screwed on, the amesdial fixing screws Matching hole setting and front end on 40 face amesdial matching seats, which are used to contact with the detection bar peripheral surface in matching hole, to be realized It is fixed.
In this way, having structure simple, facilitate implementation, and digital dial gauge be slidably matched and fix it 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 forward in the axial direction 41, lengthening block front end is provided with a detection ball 42 and forms the test side.
In this way, can preferably extend the length of detection bar, it is made smoothly to realize detection, while can be convenient for difference The correspondence size of the engine valve stem adjustment detection ball of model, makes it more smoothly realize detection, improves detection reliability.
Wherein, it lengthens and is provided with vertical crack 43 in the middle part of 41 front half section of block along its length, crack makes 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 42 surface of ball.
In this way, 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 lengthen after block front half section is separated to form left front half section and right front half section, it can be by a left side The elasticity of front half section and right front half section itself facilitates the insertion installation of detection ball.
Wherein, also there is one at 43 inner end of crack and expand rounded extended region space 44 to two sides.
In this way, the position of left front half section and right front half section generation flexible deformation is in rear end when making installation detection ball Extended area spatial position, front end restores and remains that detection circle can be clamped after capable of better ensuring that detection ball installation The state of ball avoids left front half section and right front half section front end from generating influence of the flexible deformation to detection accuracy, improves detection accuracy.
Wherein, lengthening has a detection bar pilot hole being arranged along its length in the middle part of 41 rear end face of block, 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 end is exposed to the extended area space 44 of crack.In this way, can be convenient detection bar assembly Assembly and alignment between hole and lengthening block, to improve detection accuracy.
Wherein, lengthening 41 rear end upper surface of block, which is screwed on, is provided with detection bar fixing bolt 45, before detection bar fixing bolt 45 End is fixed for realizing with the contact of digital dial gauge detection bar front end movable part.In this way, structure is simple, 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 be screwed on to be provided with before, lengthens block fixing bolt 46.In this way, After the loading for completing detection ball, it can realize to left front half section and right front half section front end by block fixing bolt is lengthened along left and right The limitation of propagation direction flexible deformation thoroughly prevents it from generating influence of the flexible deformation to detection accuracy.
The engine valve stem detection method of the present embodiment further includes the step detected to engine valve stem end face run-out tolerance 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 is as shown in Figure 3-4, including pedestal 1, and valve positioning fixture and valve stem end face run-out testing agency, institute are provided on pedestal The bearing positioning of valve positioning fixture in the horizontal direction for realizing engine valve stem is stated, valve stem end surface glitch detection mechanism includes Detection is realized in one dial test indicator 21, the engine valve stem end face contact after the gauge head of dial test indicator 21 is used for and positions.
In this way, 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 face 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 valve positioning fixture includes the bar portion peripheral surface support being set on the base along same level straight line Seat 3, the bar portion being provided on bar portion peripheral surface support base 3 for carrying out upward support positioning to bar portion peripheral surface are circumferential Surface support component, bar portion peripheral surface supporting member is used for and two side contacts of bar portion peripheral surface lower part realize support positioning.
In this way, valve positioning fixture structure is simple, positioning is convenient and efficient, is conducive to detection and realizes.
Wherein, the bar portion peripheral surface supporting member includes equivalent and two pairs of supporting sepheres 5 of horizontal pair setting, and two Setting is spaced to supporting sephere 5 and respectively medium position is in same level rectilinear direction, two branch in each pair of supporting sephere 5 The sphere opposite side upper half is supportted to be used to realize support positioning with the contact of bar portion peripheral surface.
Supported in this way, realizing to contact bar portion peripheral surface using two pairs of supporting sepheres being arranged in pairs, such bar portion and Supporting member is to be in point contact, and can utmostly avoid causing axial line when rotation not exist due to the irregular of bar portion itself On straight line and then increase detection error, improves detection accuracy.It can guarantee stability of strutting system using two pairs of supporting sepheres. The support positioning of bar portion can also be realized when implementing certainly using V-arrangement locating piece, but this structure is two positioning surfaces and bar portion Contact, if bar itself circle itself flatness of irregular or positioning surface is inadequate, there is no axial line when will lead to bar portion rotation 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 set on the linear position between two pairs of supporting sepheres.Material is more saved relative to using a support base in this way, Facilitate support load, while being conducive to adjust the position between two pairs of supporting sepheres with more convenient detection.
Wherein, 3 upper center of bar portion peripheral surface support base is provided with the supporting sephere mounting groove that horizontal cross-section is in rectangle, Supporting sephere 5 is pairs of to be mounted in supporting sephere mounting groove, and two pairs of supporting sepheres are affixed setting and two support balls The surrounding of body and mounting groove is affixed setting.In this way, 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 packet are additionally provided on any bar portion peripheral surface support base An elastic piece 6 is included, 6 one end of elastic piece is fixed on bar portion peripheral surface support base, and the other end, which is provided with, to be supported positioned at two Duis Compressing member above sphere intermediate connection, the bar portion upper surface contact after compressing member is used for and positions press.
In this way, applying a pressure to bar portion upper surface using simple structure, can prevent in detection process, manpower band The excessive or force that exerts a force when dynamic valve rotation is unbalanced and leads to bar portion bounce displacement, better assures that detection accuracy is reliable.
Wherein, the compressing member is a roll sleeve 7 being installed in rotation on elastic piece, 7 axis direction of roll sleeve and peace Bar portion axis direction after setting position is consistent.It rolls and rubs both in this way, reduce compressing member and bar portion contact area, while when detecting It wipes, can preferably reduce influence of the compressing member to detection.
Wherein, valve stem end surface glitch detection mechanism further includes a bar portion end face positioning seat 4, bar portion end face positioning seat 4 On be provided with for the bar portion end face limit component limited that offsets with bar portion end face;Bar portion end face limit component is a water The mandril 8 of flat setting, 8 one end of mandril have the top and top end face circle center location for being used for and positioning rear rod portion of cone Contact limit;The dial test indicator 21 is fixed on the mandril 8, and the gauge head of dial test indicator 21 is located at mandril top Point is using bar portion end face radius of circle as the front side adjacent of the circle location of radius.
In this way, by the round heart contact limit in top and bar portion end face, it is ensured that realize to valve stem axial direction Limit avoids when rotary pneumatic door rod due to causing axial displacement when force is uneven and then impacting to testing result.And More importantly the position limiting structure can better ensure that bar portion rotary course axis line position is constant, therefore will not influence thick stick Detection of the bar amesdial to bar portion end face run-out, therefore better assure that detection accuracy.
It is provided with dial test indicator mounting base 22 on the mandril 8, is horizontally disposed in the dial test indicator mounting base 22 There is mandril pilot hole, is provided with mandril below mandril pilot hole straight down and clamps seam, the lever thousand that mandril clamps seam side divides Mounting base fixing bolt 23 is provided in table mounting base 22, mounting base fixing bolt 23 laterally slidably extends through mandril and clamps seam The dial test indicator mounting base and screw thread of side are rotatably connected in the threaded hole that mandril clamps on seam other side inner wall, dial test indicator Mounting base 22 is slidably fit on mandril 8 by mandril pilot hole and can realize by rotary mounting seat fixing bolt solid It is fixed;The dial test indicator is fixedly mounted on dial test indicator upper surface.
In this way, can preferably facilitate the axial position for adjusting dial test indicator on mandril, so that dial test indicator It is top using bar portion end face radius of circle as the front side adjacent of the circle location of radius that gauge head can be precisely located at mandril, with suitable Benefit realizes detection.
Wherein, a mandril mounting post 9 has been arranged vertically upwards on the positioning seat of bar portion end face, mandril 8 is horizontal through top One mandril mounting hole on bar mounting post top, mandril mounting post top are also screwed with a mandril fixing bolt, and mandril is fixed Mandril in bolt front end and mandril mounting hole abuts the fixation for realizing mandril.In this way, before can be convenient ground installation and adjustment mandril Position afterwards.
Wherein, the vertical mandril mounting post that the grafting of mandril mounting post lower end is mounted on the positioning seat of bar portion end face is inserted In hole, also face mandril mounting post jack level is pushed up through mandril mounting post positioning bolt is screwed on the positioning seat of bar portion end face Bar mounting post positioning bolt front end and mandril mounting post, which abut, fixes.Mandril mounting post upper and lower position is adjusted in this way, facilitating, in turn Mandril height and position is adjusted, is guaranteed in the middle part of mandril axial line and two pairs of supporting sepheres when need to only design production in same vertical flat In face, the round heart contact in bar portion end face after can adjusting the top of mandril and positioning more conveniently during installation is fixed Position.
Wherein, base upper surface is provided with dovetail groove 10,3 He of bar portion peripheral surface support base along valve orientation Positioning seat 4 lower end in bar portion end face is respectively vertically provided with to be slidably fit into dovetail groove with the matched fixture block of dovetail groove 10, It is respectively 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 being screwed on Now it is locked.
In this way, facilitate the mutual distance adjusted between two bar portion peripheral surface support bases and bar portion end face positioning seat, with Realization is facilitated to detect.

Claims (9)

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, when engine valve stem Linearity surveying, engine valve stem to be detected is positioned to two positioning surfaces of two sections of location structures On, then pushing down engine valve stem makes it form the line contact along two parallel lines, two sections of location structures with two positioning surfaces respectively Between reserve detection notch for detection, make its test side from detection gap position and engine valve stem week using digital dial gauge Certain precompressed amount is contacted and generated to surface, then fixes digital dial gauge;Engine valve stem and two positioning are kept at this time While the line contact 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 straightness data of engine valve stem;
Engine valve stem Linearity surveying, engine valve stem linearity testing apparatus packet are realized using engine valve stem linearity testing apparatus Bottom block is included, engine valve stem positioning fixture and engine valve stem straightness detection mechanism, the engine valve stem are provided on bottom block Positioning fixture includes the location structure of two sections of one length directions of following wind setting, and every section of location structure includes two intersections in angle Positioning surface, two positioning surfaces of two location structures respectively can be used in the line formed on same straight line with valve stem and contact, and two Position between section location structure is formed with a detection notch;The engine valve stem straightness detection mechanism includes a valve Bar portion Linearity surveying digital dial gauge, digital dial gauge have a horizontally disposed cooperation section, and cooperation section cooperation is being set Be placed in the matching hole on an amesdial matching seat of bottom block, it is described be combined into can along digital dial gauge detect pole length Being slidably matched for direction sliding, is additionally provided on amesdial matching seat and is carried out to engine valve stem Linearity surveying with digital dial gauge Fixed amesdial fixed structure, digital dial gauge detection bar is perpendicular to the valve stem direction of axis line after positioning and face detects Gap position setting, and digital dial gauge detection bar front end is formed with a test side, valve after which is used for and positions Detection is realized in the contact of bar peripheral surface.
2. engine valve stem detection method as described in claim 1, which is characterized in that engine valve stem positioning fixture, which includes whole, is in The first locating piece and the second locating piece of rectangular block shape structure, the first locating piece and the second locating piece horizontal direction fitting setting are simultaneously Fixed to making the fitting side side of the first locating piece upper surface and the second locating piece form described two positioning surfaces on bottom block, The detection notch is obtained by the groove of the first locating piece and the second locating piece upper surface.
3. engine valve stem detection method as claimed in claim 2, which is characterized in that engine valve stem positioning fixture further includes one Third locating piece, the third locating piece are fixed on bottom block by screw, third locating piece upper surface be provided with one it is whole Body is in the locating slot of cuboid structure, and positioning groove bottom is horizontally disposed locating piece datum level, positions groove width and first and determines Position block and the second locating piece are consistent along the sum of the width for being bonded side side surface direction 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 bottom surface of positioning block and the fitting of locating piece datum level, locating slot are located at number The overhead surface of one side position of word amesdial is lower than the first locating piece upper surface location.
4. engine valve stem detection method as described in claim 1, which is characterized in that further include 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 a positioning surface angle face and under the effect of elastic component elastic force and after positioning It compresses.
5. engine valve stem detection method as claimed in claim 4, which is characterized in that curved arc under being in the middle part of elastic press, Elastic press upper center has extended to form forward installation shaft along the length direction, and the applicator member is to be rotatably engaged Roller body in shaft is installed, engine valve stem peripheral surface forms point contact and realizes pressure after roller body peripheral surface is used for and positions Tightly.
6. engine valve stem detection method as described in claim 1, which is characterized in that the cooperation section is formed in digital dial gauge Detection rod rear end fixed part on, the amesdial fixed structure includes one thousand be arranged on amesdial matching seat that is screwed on Divide table fixing screws, the matching hole setting and front end on the amesdial fixing screws face amesdial matching seat are used for and cooperate Detection bar peripheral surface contact in hole, which is realized, to be fixed.
7. engine valve stem detection method as described in claim 1, which is characterized in that digital dial gauge detection bar front 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.
8. engine valve stem detection method as claimed in claim 7, which is characterized in that lengthen in the middle part of block front half section along its length It is provided with vertical crack, crack makes lengthening block front half section form 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.
9. engine valve stem detection method as described in claim 1, which is characterized in that further include public to engine valve stem end face run-out The step of difference is detected, the detection of engine valve stem end face run-out tolerance is realized using valve stem end surface jitter detection apparatus, described Valve stem end surface jitter detection apparatus includes pedestal, and valve positioning fixture and valve stem end face run-out detection machine are provided on pedestal Structure, bearing positioning of the valve positioning fixture for realizing engine valve stem in the horizontal direction, valve stem end surface glitch detection machine Structure includes a dial test indicator, and detection is realized in the engine valve stem end face contact after the gauge head of dial test indicator is used for and positions; The valve positioning fixture includes the bar portion peripheral surface support base being set on the base along same level straight line, bar portion circumferential direction table The bar portion peripheral surface supporting member for carrying out upward support positioning to bar portion peripheral surface, bar are provided on the support base of face Portion's peripheral surface supporting member is used for and two side contacts of bar portion peripheral surface lower part realize support positioning.
CN201710576048.0A 2017-07-14 2017-07-14 A kind of engine valve stem detection method Expired - Fee Related CN107388943B (en)

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