CN108955502B - Method for detecting end face precision of valve plate - Google Patents

Method for detecting end face precision of valve plate Download PDF

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Publication number
CN108955502B
CN108955502B CN201810494528.7A CN201810494528A CN108955502B CN 108955502 B CN108955502 B CN 108955502B CN 201810494528 A CN201810494528 A CN 201810494528A CN 108955502 B CN108955502 B CN 108955502B
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detection
valve
face
valve disc
detecting
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CN108955502A (en
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张军
谭春禄
蒋英钰
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Yangtze Normal University
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Yangtze Normal University
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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 techniques
    • G01B5/28Measuring arrangements characterised by the use of mechanical techniques for measuring roughness or irregularity of surfaces
    • 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 techniques
    • G01B5/0025Measuring of vehicle parts

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Indication Of The Valve Opening Or Closing Status (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)

Abstract

The invention discloses a method for detecting the end face precision of a valve disc, which is characterized by comprising the step of detecting the end face flatness of the valve disc, wherein when the end face flatness of the valve disc is detected, the end face of the valve disc is attached to a detection plane, slides along the linear direction and passes through a contact at the upper end of a flatness detection dial gauge detection rod exposed out of the detection plane, and the maximum difference value of a flatness detection dial gauge is read to convert to obtain the end face flatness of the valve disc. The method also comprises the step of detecting the end face circle run-out tolerance of the valve disc. The invention can be used for detecting the flatness of the end face of the valve and has the advantages of simple implementation, convenient and quick operation, accurate and reliable detection result and the like.

Description

Method for detecting end face precision of valve plate
Technical Field
The invention belongs to the technical field of production and detection of automobile engine parts, and particularly relates to a method for detecting end face precision of a valve plate.
Background
The automobile engine can convert chemical energy of fuel or other forms of energy into mechanical energy to provide power for the automobile, is the heart of the automobile and belongs to a technology-intensive product. With the development of economy in China, the automobile industry is rapidly developed while the demand for automobiles is increased day by day, and the performance requirements of people on automobile engines are higher and higher.
In an automobile engine, an air inlet and exhaust valve is a component which is composed of a disk part and a rod part which is coaxially arranged with the disk part into a whole, belongs to one of key parts of the automobile engine, is a door of an engine combustion chamber, is a key basic part for sealing an air inlet and exhaust port in the working process of the engine, and is used for blocking an air flow channel and controlling the gas exchange of the engine. The intake and exhaust valves are each opened and closed once during each operation of the engine. The valve is subjected to the pressure of the valve spring and the pressure of the seating as the valve opens and closes. The intake and exhaust valves function to seal the combustion chamber, particularly during the compression and power strokes. Therefore, the quality of the valve quality has a significant impact on engine performance and life.
The machining precision and structure of the valve have a great effect on the motion of an engine valve mechanism, and meanwhile, the end face error of the valve is a key parameter of the valve and is closely related to the sealing effect of the valve.
The flatness tolerance of the end face of the valve disc is to compare the surface of the valve disc with an ideal plane, and the line value distance between the surface of the valve disc and the ideal plane is a flatness tolerance value; generally by measuring the relative height difference of several points on the actual surface of the valve disc and then converting the flatness error value in line values. The flatness error exceeds the specified standard, which can cause larger error when the valve is processed and the valve conical surface is detected, and seriously affects the air tightness of the valve and the normal work of the engine. In the existing valve production enterprises, some valve production enterprises mainly rely on a flatness measuring instrument to detect the flatness of the end face of the valve disc. The inspection cost is high, and the required time is long, so the straightness and the number of times and the batch of the inspection of the valve rod part are very limited.
In addition, the end face circle run-out tolerance of the valve is also a key parameter of the valve and is closely related to the sealing effect of the valve. The valve disc end face circular run-out tolerance is a position tolerance item used for controlling a valve disc end face contour element to keep a certain precision relative to a valve axis, and is defined as the maximum run-out allowed when the valve disc end face rotates for one circle or continuously rotates around a reference axis. Run-out tolerances are to be distinguished from orientation and positioning tolerances, which are tolerance items given on the basis of a specific detection pattern. The run-out tolerance has comprehensive control effect on the measured elements, namely, the run-out tolerance has control effect on position errors and can control certain shape errors, and the functional requirements of parts can be fully embodied, so that the run-out tolerance is widely applied to production. In the existing valve production enterprises, some valve production enterprises mainly rely on the bounce detector to detect the end face bounce of the valve disc. The inspection cost is high, and the required time is long, so that the inspection times and the number of times and the batch of the valve end face runout are very limited.
Therefore, how to design a method for detecting the end face precision of the valve disc, which is simple to implement, convenient and rapid to operate and reliable in detection, to realize the detection of the end face parameters of the valve becomes a problem to be considered and solved.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the method for detecting the end face precision of the valve disc is simple to implement, convenient and quick to operate, capable of being used for detecting the end face precision parameters of the valve and accurate and reliable in detection result.
In order to solve the technical problems, the invention adopts the following technical scheme.
The method for detecting the end face precision of the valve disc is characterized by comprising the step of detecting the end face flatness of the valve disc, wherein when the end face flatness of the valve disc is detected, the end face of the valve disc is attached to a detection plane, slides along the linear direction and passes through a contact at the upper end of a flatness detection dial indicator detection rod exposed out of the detection plane, and the maximum difference value of the flatness detection dial indicator is read to convert the flatness of the end face of the valve disc.
Therefore, by adopting the method, the flatness of the end face of the valve plate can be conveniently and quickly detected, the implementation is simple, and the operation is convenient and quick.
The step of detecting the flatness of the end face of the valve disc is realized by adopting a valve disc end face flatness detecting device, the valve disc end face flatness detecting device comprises a detecting table, the upper surface of the detecting table is a horizontal detecting plane, a vertical first standard abutting surface and a vertical second standard abutting surface are upwards formed in the detecting plane, the second standard abutting surface and the first standard abutting surface are vertically arranged, the distance between the second standard abutting surface and the first standard abutting surface is smaller than the circular radius of the end face of the valve disc, a detecting hole is further formed in the detecting plane, the distance between the detecting hole and the first standard abutting surface is in the circular diameter of the end face of the valve disc, the distance between the detecting hole and the second standard abutting surface is larger than or equal to the circular diameter of the end face of the valve disc, a dial gauge for flatness detection is fixedly arranged below the detecting table, a detecting rod of the dial gauge for flatness detection is vertically upwards arranged, and a contact at the upper end of the detecting rod of the dial gauge for flatness detection is exposed out of the detecting hole and and (3) a range.
Like this, during the use, only need to wait to detect the valve plate terminal surface laminating to detecting the plane on, then make valve plate one side and first standard to lean on the face laminating, lean on the direction of face to remove the valve plate toward the second standard, lean on the face to lean on through whole valve plate terminal surface and with the second standard until the plane degree detects with the measuring stick upper end contact of amesdial, read the last maximum difference of amesdial and can obtain valve plate terminal surface plane degree, during specific operation, can once detect back horizontal rotation adjustment valve angle and detect in order to improve the precision many times again. Therefore, the device has the advantages of simple structure, convenient and fast operation, and accurate and reliable structure.
And as optimization, the distance between the detection hole and the first standard abutting surface is consistent with the radius of the valve disc end face circle. Therefore, the upper end contact of the detection rod of the dial indicator for flatness detection can pass through in the diameter direction of the valve plate end face circle just during detection, and the detection precision is improved better.
As optimization, a first standard block is arranged on the detection table, one side of the first standard block forms the first standard abutting surface, a first standard block positioning hole which is long in strip shape and perpendicular to the first standard abutting surface is arranged on the first standard block, and a first standard block fixing bolt which is downwards inserted into a corresponding through hole in the detection table is matched in the first standard block positioning hole to fix the first standard block.
Therefore, the distance from the first standard block to the detection hole can be adjusted, and the valve detection device is suitable for valve detection of different models and sizes.
Furthermore, the first standard block positioning holes are two in parallel and spaced. Therefore, rotation generated when the first standard block is adjusted can be avoided, and the adjustment direction is guaranteed to be just opposite to the direction of the detection hole for moving adjustment.
And as optimization, a second standard block is arranged on the detection table, one side of the second standard block forms a second standard abutting surface, a second standard block positioning hole which is long in strip shape and perpendicular to the second standard abutting surface is arranged on the second standard block, and a second standard block fixing bolt which is downwards inserted into a corresponding through hole in the detection table is matched in the second standard block positioning hole to fix the second standard block.
Therefore, the distance from the second standard block to the detection hole can be adjusted, and the valve detection device is suitable for valve detection of different models and sizes.
Furthermore, the second standard block positioning holes are two in parallel and arranged at intervals. Therefore, rotation generated when the second standard block is adjusted can be avoided, and the adjustment direction is guaranteed to be just opposite to the direction of the detection hole for moving adjustment.
As optimization, the detection table is arranged below the detection hole and is provided with a dial indicator fixing block, a dial indicator assembly hole right facing the detection hole is vertically arranged in the dial indicator fixing block in a penetrating mode, the detection rod and the dial plate of the dial indicator for flatness detection are fixed mutually and are arranged in the dial indicator assembly hole in a penetrating mode, a fastening screw hole is further formed in the side direction of the dial indicator assembly hole in the dial indicator fixing block, and a fastening bolt is arranged in the fastening screw hole in a matched mode and used for achieving fixing of the dial indicator for flatness detection.
Therefore, the fastening bolt is loosened, the height of the dial indicator for flatness detection can be adjusted up and down, and then the height range of the detection hole exposed by the contact at the upper end of the detection rod of the dial indicator for flatness detection is adjusted, so that the dial indicator is suitable for detection of different types of valves and different valve plate end face flatness tolerance ranges.
As optimization, the detection platform comprises a detection plate horizontally arranged above, the upper surface of the detection plate is the detection plane, support plates are vertically arranged on two sides of the detection plate downwards, the lower ends of the support plates are fixed on a horizontally arranged bottom plate, and the dial indicator for flatness detection is located between the bottom plate and the detection plate. Like this, examine test table structure simpler, reliable and stable.
As optimization, the invention also comprises a step of detecting the end face circular run-out tolerance of the valve disc, wherein the step of detecting the end face circular run-out tolerance of the valve disc is realized by adopting a valve disc end face circular run-out detection device which comprises a base, and a valve positioning mechanism and a valve disc end face circular run-out detection mechanism are arranged on the base; the valve positioning mechanism is used for horizontally positioning a valve to be detected and realizing the unilateral limitation of the positioned valve in the axial direction deviating from the direction of the valve disc, the valve disc end face circular runout detection mechanism comprises a dial indicator mounting seat, a dial indicator horizontally arranged is mounted on the dial indicator mounting seat, a dial indicator contact is arranged right at a detection point position deviating from the circle center on the positioned valve disc end face, and a dial indicator adjusting mechanism used for adjusting the dial indicator along the axial fixed position is arranged on the dial indicator mounting seat.
When the end face circle run-out tolerance of the valve disc is detected, the valve to be detected is horizontally positioned by the valve positioning mechanism and single-side limit of the valve in the axial direction deviating from the valve disc direction is realized, the axial position of the dial indicator is adjusted to enable the contact of the dial indicator to be in point contact with the detected point of the positioned end face of the valve disc and generate certain pre-pressure, the pre-pressure reading is larger than the limit value of the end face circle run-out tolerance of the valve disc, then the valve is rotated for a circle along the axial lead of the valve under the condition that the axial single-side limit of the valve is kept, and the difference between the maximum value and the minimum value of the display reading of the dial. Therefore, the device has the advantages of simple structure, low cost, convenience and rapidness in detection, accuracy and reliability.
As the optimization, amesdial adjustment mechanism, including a vertical montant that sets up on the amesdial mount pad, the amesdial mounting hole has been seted up to montant middle part level, the measuring stick and the dial plate of amesdial are pegged graft in the amesdial mounting hole mutually fixed part, the unsteady part that is used for setting up the contact on the measuring stick of amesdial stretches out the amesdial mounting hole, upwards seted up in the montant of amesdial mounting hole top and slotted, the montant of the both sides of slotting is provided with the clamping bolt hole and the clamping bolt who corresponds along the perpendicular direction of slotting that runs through, clamping bolt is used for realizing the fixing of the clamp of tight in order to.
Therefore, after the clamping screw rod is loosened, the detection rod of the dial indicator can be adjusted, the front position and the rear position in the mounting hole of the dial indicator can be adjusted in place and then fixed, and the mounting position of the dial indicator can generate certain pre-pressure on the end face of the positioned valve disc. Meanwhile, the structure has the advantages of simple structure, convenience and quickness in adjustment and the like.
As the optimization, valve positioning mechanism includes a valve positioning seat, valve positioning seat upper surface is provided with a constant head tank that runs through along the fore-and-aft direction, the constant head tank is used for realizing the location along constant head tank length direction to the valve, the valve positioning seat has a vertical regulating plate mounting plane that is located the constant head tank front side, both sides respectively are provided with a location screw about lieing in the constant head tank front side on the regulating plate mounting plane, both sides still respectively are provided with a vertical regulating plate about the constant head tank front side, regulating plate trailing flank and regulating plate mounting plane laminating, the inboard that two regulating plates are relative is vertical spacing face, it is provided with the horizontally rectangular hole to correspond the location screw on the regulating plate, it passes the rectangular hole that corresponds and the location screw realizes fixing to the regulating plate still to be provided with two positioning bolts.
Therefore, when the valve limiting device is used, the positioning bolt is loosened firstly, the valve is positioned in the positioning groove, the valve disc extends out of the positioning groove, then the regulating plate is moved in the left-right direction to enable the limiting surface of the regulating plate to be in contact with the conical surface behind the valve disc, then the positioning bolt is locked to fix the regulating plate, and the valve can be conveniently and quickly limited in the axial direction. Like this, rely on the conical surface contact realization of regulating plate and valve plate rear to spacing, because the valve is when production, general conical surface relies on the inner chamber of lower mould to take shape, and valve plate terminal surface relies on drift punching press to take shape, so the precision of conical surface can be higher than the precision of valve plate terminal surface far away. Therefore, the limiting is realized by means of the point contact of the limiting surface of the adjusting plate and the conical surface at the rear of the valve plate, then the limiting surface of the adjusting plate and the conical surface at the rear of the valve plate rotate to form a round line in the rotating process of the valve, the precision of the round line can be guaranteed, the error is further reduced, and the detection result is better guaranteed to be the data reflecting the flatness of the end surface of the valve plate.
Further, be provided with two positioning cylinder along the fore-and-aft direction in the constant head tank, two positioning cylinder set up side by side along constant head tank width direction, form the double-layered groove that is used for fixing a position the valve between two positioning cylinder upper surfaces, the valve positioning seat of constant head tank one side is gone up and has been seted up cylinder adjusting screw along perpendicular to constant head tank direction level, cylinder adjusting screw is two at least just to positioning cylinder setting that the level set up side by side, connects the cooperation soon on the cylinder adjusting screw and has cylinder adjusting bolt.
Like this, rely on two positioning roller to realize the location to the valve, simple structure and location convenient and fast are reliable. The tightness degree between two cylinders can be adjusted to two cylinder adjusting bolts that set up simultaneously, and then the width of the double-layered groove that forms between the two positioning roller upper surfaces of adjusting, and then realize adjusting the valve height of location, so under the fixed circumstances of amesdial high position, conveniently adjust valve high position and for being fit for realizing the position that the terminal surface circle beats the detection in order to ensure amesdial and valve plate terminal surface contact point apart from the position of the centre of a circle, ensure to detect the precision, and have the advantage of adjusting convenient and fast.
Furthermore, the roller adjusting screw hole is arranged right opposite to the position of the axis of the positioning roller. Therefore, the positioning roller can be more conveniently abutted and applied with force during tightness adjustment.
Further, the length of the positioning roller is smaller than the length of the rod part of the valve to be detected. When the valve is rotated in the detection process, the tail end of the valve rod part can stretch out the positioning roller and the suspended part can be used for realizing the rotation of the valve, the valve can be rotated more conveniently, and the positioning state of the valve during rotation can be better ensured to be unchanged, so that the detection precision is improved.
Further, the edge of the front end face of the positioning roller is provided with a chamfer. Therefore, the influence on the detection precision caused by the mutual interference of the front end surface of the positioning roller and the conical surface behind the valve plate of the valve to be detected can be better avoided.
Furthermore, an adjusting plate centering adjusting structure is further arranged, the adjusting plate centering adjusting structure comprises two adjusting nuts correspondingly arranged in front of the two adjusting plates, screw holes of the adjusting nuts are horizontally arranged along the width direction of the positioning groove, the adjusting nuts are respectively fixed on a nut seat, nut fixing screw holes are formed in the adjusting plates corresponding to the nut seats, horizontal strip-shaped holes are formed in the nut seats corresponding to the nut fixing screw holes, and nut fixing bolts penetrate through the strip-shaped holes in the nut seats and the corresponding nut fixing screw holes to realize the fixation of the nut seats on the corresponding adjusting plates; the adjusting plate centering adjusting structure further comprises a bidirectional screw rod, and two sections of external threads are symmetrically arranged on the bidirectional screw rod and are respectively screwed in the two adjusting nuts.
Therefore, the centering adjustment structure can be used for centering by virtue of the adjusting plate before detection, and adjustment can be carried out when polish rods of different models are detected. Specifically, during centering, the nut fixing bolt and the positioning bolt are loosened firstly, then the positions of the two positioning rollers are determined, a polished rod is placed between the two positioning rollers for positioning, then the two adjusting plates are moved to enable the opposite limiting surfaces of the two adjusting plates to be in contact with the polished rod, then the adjusting plates are fixed by rotating the positioning bolts, then the nut seat is fixed by rotating the nut fixing bolt, and the polished rod is taken down to realize centering. When the valve of different models size is detected after centering, can be through rotatory two-way lead screw for two regulating plates draw close or reverse separation along with the adjusting nut syntropy that corresponds, thereby adjust the width distance between two regulating plates according to the valve of different models size, make it can just with wait to detect the valve dish rear end toper position department contact in order to realize detecting and ensure and detect the precision. And then guaranteed that two regulating plates realize quick adjustment under the condition that keeps the centering, improved the convenience and the reliability of using the regulation.
Furthermore, a rotating knob is arranged at one end of the bidirectional screw rod. This facilitates the rotational adjustment.
Furthermore, a screw rod seat is arranged in the middle of the bidirectional screw rod, the screw rod seat is fixed on the base, a screw rod through hole is horizontally arranged on the screw rod seat in a penetrating mode, and the bidirectional screw rod is rotatably matched in the screw rod through hole.
Therefore, the height position of the screw rod is fixed by the screw rod seat, so that the adjustment operation is more convenient, and the condition that the subsequent detection precision is influenced by the displacement of the adjusting plate driven when the screw rod is adjusted is avoided.
Furthermore, a screw axial position limiting structure for limiting the axial displacement of the screw is arranged between the screw seat and the screw. Therefore, the left and right positions of the screw rod can be better limited, the left and right displacement of the screw rod during adjustment is better avoided, the adjustment plate is driven to move, and the symmetry and the reliability of adjustment are ensured. During implementation, the screw axial position limiting structure can be obtained by a concave-convex matching structure which is arranged between the inner wall of the screw through hole and the corresponding outer wall of the screw along the circumferential direction.
In conclusion, the invention can be used for detecting the flatness of the end face of the valve and the circular run-out tolerance of the end face of the valve, and has the advantages of simple implementation, convenient and quick operation, accurate and reliable detection result and the like.
Drawings
Fig. 1 is a schematic perspective view of a valve disc end surface flatness detection apparatus employed in the present invention.
Fig. 2 is a front view of the valve disc end surface flatness detecting apparatus of fig. 1.
Fig. 3 is a top view of fig. 2.
Fig. 4 is a schematic perspective view of the valve disc end face circular runout detection apparatus employed in the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Example (b): the method for detecting the end face precision of the valve disc comprises a step of detecting the end face flatness of the valve disc and a step of detecting the end face circular run-out tolerance of the valve disc, and the detection is realized by adopting the end face flatness detection device of the valve disc shown in figures 1-3 and the end face circular run-out detection device of the valve disc shown in figure 4. The former is used for realizing the valve plate terminal surface flatness detection, and the latter is used for realizing the valve plate terminal surface circle run-out tolerance detection.
More specifically, the valve disc end face flatness detecting device is shown in fig. 1-3, and includes a detecting table, wherein the upper surface of the detecting table is a horizontal detecting plane 1 ', a vertical first standard abutting surface and a vertical second standard abutting surface are formed upwards in the detecting plane 1 ', the second standard abutting surface and the first standard abutting surface are vertically arranged, the distance between the second standard abutting surface and the first standard abutting surface is smaller than the radius of the valve disc end face circle, a detecting hole 2 ' is further arranged on the detecting plane, the distance between the detecting hole 2 ' and the first standard abutting surface is within the radius of the valve disc end face circle, the distance between the detecting hole and the second standard abutting surface is larger than or equal to the diameter of the valve disc end face circle, a flatness detecting dial gauge 3 ' is fixedly arranged below the detecting table, a detecting rod of the flatness detecting dial gauge 3 ' is vertically upwards arranged, and a detecting rod upper end contact of the flatness detecting dial gauge is exposed out of the detecting hole 2 ' and is larger than the flatness tolerance range of the valve disc end face And (5) enclosing.
Like this, when detecting valve plate terminal surface plane degree, only need to wait to detect valve plate terminal surface laminating to detect the plane on, then make valve plate one side and first standard support to face laminating, support to the direction removal valve plate of face toward the second standard, support to the face and lean on mutually through whole valve plate terminal surface and with the second standard until the plane degree detects with the measuring stick upper end contact of amesdial, read the last maximum difference of amesdial and can obtain valve plate terminal surface plane degree, during specific operation, can once detect back horizontal rotation adjustment valve angle and detect many times again in order to improve the precision. Therefore, the device has the advantages of simple structure, convenient and fast operation, and accurate and reliable structure.
The distance between the detection hole 2' and the first standard abutting surface is consistent with the radius of the valve disc end face circle. Therefore, the upper end contact of the detection rod of the dial indicator for flatness detection can pass through in the diameter direction of the valve plate end face circle just during detection, and the detection precision is improved better.
The first standard block 4 'is arranged on the detection table, one side of the first standard block 4' forms the first standard abutting face, a first standard block positioning hole which is long in strip shape is arranged on the first standard block 4 'and perpendicular to the first standard abutting face, and a first standard block fixing bolt 5' which is downwards inserted into a corresponding through hole in the detection table is matched in the first standard block positioning hole to fix the first standard block.
Therefore, the distance from the first standard block to the detection hole can be adjusted, and the valve detection device is suitable for valve detection of different models and sizes.
The first standard block positioning holes are two in parallel and arranged at intervals. Therefore, rotation generated when the first standard block is adjusted can be avoided, and the adjustment direction is guaranteed to be just opposite to the direction of the detection hole for moving adjustment.
The second standard block 6 ' is arranged on the detection table, one side of the second standard block 6 ' forms a second standard abutting surface, a second standard block positioning hole which is long in strip shape and perpendicular to the second standard abutting surface is arranged on the second standard block, and a second standard block fixing bolt 7 ' which is downwards inserted into a corresponding through hole in the detection table is matched in the second standard block positioning hole to fix the second standard block.
Therefore, the distance from the second standard block to the detection hole can be adjusted, and the valve detection device is suitable for valve detection of different models and sizes.
The second standard block positioning holes are two in parallel and are arranged at intervals. Therefore, rotation generated when the second standard block is adjusted can be avoided, and the adjustment direction is guaranteed to be just opposite to the direction of the detection hole for moving adjustment.
Wherein, it is provided with a amesdial fixed block 8 ' to detect the platform and be located the inspection hole below, and vertical run through is provided with a amesdial pilot hole just to the inspection hole in the amesdial fixed block 8 ', the test bar that the plane degree detects with amesdial 3 ' and the fixed part of dial plate mutually run through and install in the amesdial pilot hole, and the fastening screw has still been seted up in the side direction that lies in the amesdial pilot hole on the amesdial fixed block 8 ', and the fastening screw fit in is provided with fastening bolt 9 ' and is used for realizing the fixed of the amesdial for the plane degree detects.
Therefore, the fastening bolt is loosened, the height of the dial indicator for flatness detection can be adjusted up and down, and then the height range of the detection hole exposed by the contact at the upper end of the detection rod of the dial indicator for flatness detection is adjusted, so that the dial indicator is suitable for detection of different types of valves and different valve plate end face flatness tolerance ranges.
The detection platform comprises a detection plate 12 'horizontally arranged above, the upper surface of the detection plate 12' is the detection plane 1 ', two sides of the detection plate are vertically provided with support plates 10' downwards, the lower ends of the support plates 10 'are fixed on a horizontally arranged bottom plate 11', and the dial indicator for flatness detection is positioned between the bottom plate and the detection plate. Like this, examine test table structure simpler, reliable and stable.
The valve plate end face circular runout detection device is shown in fig. 4 and comprises a base 1, wherein a valve positioning mechanism and a valve plate end face circular runout detection mechanism are arranged on the base 1; the valve positioning mechanism is used for horizontally positioning a valve to be detected and realizing the unilateral limitation of the positioned valve in the axial direction deviating from the direction of the valve disc, the valve disc end face circular runout detection mechanism comprises a dial indicator mounting seat 2, a dial indicator 3 which is horizontally arranged is installed on the dial indicator mounting seat 2, a dial indicator contact is arranged right at a detection point position deviating from the circle center on the positioned valve disc end face, and a dial indicator adjusting mechanism used for adjusting the dial indicator along the axial fixed position is arranged on the dial indicator mounting seat 2.
When the end face circle run-out tolerance of the valve disc is detected, the valve to be detected is horizontally positioned by the valve positioning mechanism and single-side limit of the valve in the axial direction deviating from the valve disc direction is realized, the axial position of the dial indicator is adjusted to enable the contact of the dial indicator to be in point contact with the detected point of the positioned end face of the valve disc and generate certain pre-pressure, the pre-pressure reading is larger than the limit value of the end face circle run-out tolerance of the valve disc, then the valve is rotated for a circle along the axial lead of the valve under the condition that the axial single-side limit of the valve is kept, and the difference between the maximum value and the minimum value of the display reading of the dial. Therefore, the device has the advantages of simple structure, low cost, convenience and rapidness in detection, accuracy and reliability.
The dial indicator adjusting mechanism comprises a vertical rod 4 arranged on a dial indicator mounting seat, a dial indicator mounting hole is horizontally formed in the middle of the vertical rod 4, a detection rod of the dial indicator 3 and a part, fixed to a dial plate, of the dial indicator are inserted into the dial indicator mounting hole, a floating part, used for setting a contact, of the detection rod of the dial indicator 3 extends out of the dial indicator mounting hole, a slit is formed in the vertical rod above the dial indicator mounting hole in an upward mode, the vertical rods on the two sides of the slit are provided with clamping bolt holes and corresponding clamping bolts 5 along the direction of the slit perpendicular to penetrate through, and the clamping bolts 5 are used for achieving fixing of the slit and clamping the dial indicator 3.
Therefore, after the clamping screw rod is loosened, the detection rod of the dial indicator can be adjusted, the front position and the rear position in the mounting hole of the dial indicator can be adjusted in place and then fixed, and the mounting position of the dial indicator can generate certain pre-pressure on the end face of the positioned valve disc. Meanwhile, the structure has the advantages of simple structure, convenience and quickness in adjustment and the like.
Wherein, valve positioning mechanism includes a valve positioning seat 6, 6 upper surfaces of valve positioning seat are provided with one and follow the constant head tank that the fore-and-aft direction runs through, the constant head tank is used for realizing the location along constant head tank length direction's to the valve, the valve positioning seat has a vertical regulating plate mounting plane that is located the constant head tank front side, both sides respectively are provided with a location screw about lieing in the constant head tank front side on the regulating plate mounting plane, both sides still respectively are provided with a vertical regulating plate 7 about the constant head tank front side, 7 trailing flank of regulating plate and the laminating of regulating plate mounting plane, two relative inboards of regulating plate 7 are vertical spacing faces, it is provided with horizontally rectangular hole to correspond the location screw on the regulating plate 7, it realizes fixing regulating plate 7 still to be provided with two positioning bolt 8 and pass corresponding rectangular hole and.
Therefore, when the valve limiting device is used, the positioning bolt is loosened firstly, the valve is positioned in the positioning groove, the valve disc extends out of the positioning groove, then the regulating plate is moved in the left-right direction to enable the limiting surface of the regulating plate to be in contact with the conical surface behind the valve disc, then the positioning bolt is locked to fix the regulating plate, and the valve can be conveniently and quickly limited in the axial direction. Like this, rely on the conical surface contact realization of regulating plate and valve plate rear to spacing, because the valve is when production, general conical surface relies on the inner chamber of lower mould to take shape, and valve plate terminal surface relies on drift punching press to take shape, so the precision of conical surface can be higher than the precision of valve plate terminal surface far away. Therefore, the limiting is realized by means of the point contact of the limiting surface of the adjusting plate and the conical surface at the rear of the valve plate, then the limiting surface of the adjusting plate and the conical surface at the rear of the valve plate rotate to form a round line in the rotating process of the valve, the precision of the round line can be guaranteed, the error is further reduced, and the detection result is better guaranteed to be the data reflecting the flatness of the end surface of the valve plate.
Wherein, be provided with two positioning roller 9 along the fore-and-aft direction in the constant head tank, two positioning roller 9 set up side by side along constant head tank width direction, form the double-layered groove that is used for fixing a position the valve between two positioning roller upper surfaces, the valve positioning seat of constant head tank one side is gone up and has been seted up cylinder adjusting screw along perpendicular to constant head tank direction level, cylinder adjusting screw is two at least just to positioning roller setting that the level set up side by side, connects the cooperation to have cylinder adjusting bolt 10 on the cylinder adjusting screw soon.
Like this, rely on two positioning roller to realize the location to the valve, simple structure and location convenient and fast are reliable. The tightness degree between two cylinders can be adjusted to two cylinder adjusting bolts that set up simultaneously, and then the width of the double-layered groove that forms between the two positioning roller upper surfaces of adjusting, and then realize adjusting the valve height of location, so under the fixed circumstances of amesdial high position, conveniently adjust valve high position and for being fit for realizing the position that the terminal surface circle beats the detection in order to ensure amesdial and valve plate terminal surface contact point apart from the position of the centre of a circle, ensure to detect the precision, and have the advantage of adjusting convenient and fast.
Wherein, the roller adjusting screw hole is arranged right opposite to the axis position of the positioning roller 9. Therefore, the positioning roller can be more conveniently abutted and applied with force during tightness adjustment.
Wherein, the length of the positioning roller 9 is less than the length of the rod part of the valve to be detected. When the valve is rotated in the detection process, the tail end of the valve rod part can stretch out the positioning roller and the suspended part can be used for realizing the rotation of the valve, the valve can be rotated more conveniently, and the positioning state of the valve during rotation can be better ensured to be unchanged, so that the detection precision is improved.
Wherein, the edge of the front end surface of the positioning roller 9 is provided with a chamfer. Therefore, the influence on the detection precision caused by the mutual interference of the front end surface of the positioning roller and the conical surface behind the valve plate of the valve to be detected can be better avoided.
The adjusting plate centering adjustment structure comprises two adjusting nuts 11 correspondingly arranged in front of the two adjusting plates, screw holes of the adjusting nuts 11 are horizontally arranged along the width direction of the positioning groove, the adjusting nuts are respectively fixed on a nut seat 12, nut fixing screw holes are formed in the adjusting plates corresponding to the nut seats 12, horizontal strip holes are formed in the nut seats corresponding to the nut fixing screw holes, and nut fixing bolts 13 penetrate through the strip holes in the nut seats and the corresponding nut fixing screw holes to fix the nut seats 12 on the corresponding adjusting plates 7; the adjusting plate centering adjusting structure further comprises a bidirectional screw 14, and two sections of external threads are symmetrically arranged on the bidirectional screw and are respectively screwed in the two adjusting nuts.
Therefore, the centering adjustment structure can be used for centering by virtue of the adjusting plate before detection, and adjustment can be carried out when polish rods of different models are detected. Specifically, during centering, the nut fixing bolt and the positioning bolt are loosened firstly, then the positions of the two positioning rollers are determined, a polished rod is placed between the two positioning rollers for positioning, then the two adjusting plates are moved to enable the opposite limiting surfaces of the two adjusting plates to be in contact with the polished rod, then the adjusting plates are fixed by rotating the positioning bolts, then the nut seat is fixed by rotating the nut fixing bolt, and the polished rod is taken down to realize centering. When the valve of different models size is detected after centering, can be through rotatory two-way lead screw for two regulating plates draw close or reverse separation along with the adjusting nut syntropy that corresponds, thereby adjust the width distance between two regulating plates according to the valve of different models size, make it can just with wait to detect the valve dish rear end toper position department contact in order to realize detecting and ensure and detect the precision. And then guaranteed that two regulating plates realize quick adjustment under the condition that keeps the centering, improved the convenience and the reliability of using the regulation.
Wherein, a rotating knob 15 is arranged at one end part of the bidirectional screw 14. This facilitates the rotational adjustment.
Wherein, two-way lead screw middle part is provided with a lead screw seat 16, and lead screw seat 16 fixes on base 1, and lead screw seat 16 is improved level and is run through and be provided with the lead screw through-hole, and two-way lead screw 14 is rotationally in the lead screw through-hole.
Therefore, the height position of the screw rod is fixed by the screw rod seat, so that the adjustment operation is more convenient, and the condition that the subsequent detection precision is influenced by the displacement of the adjusting plate driven when the screw rod is adjusted is avoided.
Wherein, be provided with the lead screw axial position limit structure of restriction lead screw axial displacement between lead screw seat and the lead screw. Therefore, the left and right positions of the screw rod can be better limited, the left and right displacement of the screw rod during adjustment is better avoided, the adjustment plate is driven to move, and the symmetry and the reliability of adjustment are ensured. During implementation, the screw axial position limiting structure can be obtained by a concave-convex matching structure which is arranged between the inner wall of the screw through hole and the corresponding outer wall of the screw along the circumferential direction.

Claims (7)

1. The method for detecting the end face precision of the valve disc is characterized by comprising the step of detecting the end face flatness of the valve disc, wherein when the end face flatness of the valve disc is detected, the end face of the valve disc is attached to a detection plane, slides along the linear direction and passes through a contact at the upper end of a flatness detection dial indicator detection rod exposed out of the detection plane, and the maximum difference value of the flatness detection dial indicator is read to convert to obtain the end face flatness of the valve disc;
the step of detecting the flatness of the end face of the valve disc is realized by adopting a valve disc end face flatness detecting device, the valve disc end face flatness detecting device comprises a detecting table, the upper surface of the detecting table is a horizontal detecting plane, a vertical first standard abutting surface and a vertical second standard abutting surface are upwards formed in the detecting plane, the second standard abutting surface and the first standard abutting surface are vertically arranged, the distance between the second standard abutting surface and the first standard abutting surface is smaller than the circular radius of the end face of the valve disc, a detecting hole is further formed in the detecting plane, the distance between the detecting hole and the first standard abutting surface is in the circular diameter of the end face of the valve disc, the distance between the detecting hole and the second standard abutting surface is larger than or equal to the circular diameter of the end face of the valve disc, a dial gauge for flatness detection is fixedly arranged below the detecting table, a detecting rod of the dial gauge for flatness detection is vertically upwards arranged, and a contact at the upper end of the detecting rod of the dial gauge for flatness detection is exposed out of the detecting hole and a range; when the valve disc detection device is used, the end face of a valve disc to be detected is attached to a detection plane, one side of the valve disc is attached to the first standard abutting face, and the valve disc is moved in the direction of the second standard abutting face;
the valve disc end face circle run-out detection device comprises a base, and a valve positioning mechanism and a valve disc end face circle run-out detection mechanism are arranged on the base; the valve positioning mechanism is used for horizontally positioning a valve to be detected and realizing the unilateral limit of the positioned valve in the axial direction deviating from the direction of the valve disc, the valve disc end face circular runout detection mechanism comprises a dial indicator mounting seat, a horizontally arranged dial indicator is mounted on the dial indicator mounting seat, a dial indicator contact is arranged right opposite to a detection point position deviating from the circle center on the positioned valve disc end face, and a dial indicator adjusting mechanism used for adjusting the position of the dial indicator along the axial direction is arranged on the dial indicator mounting seat;
among the valve plate terminal surface circle detection device that beats, valve positioning mechanism includes a valve positioning seat, valve positioning seat upper surface is provided with one and follows the constant head tank that the fore-and-aft direction runs through, the constant head tank is used for realizing the location along constant head tank length direction to the valve, the valve positioning seat has a vertical regulating plate mounting surface that is located the constant head tank front side, both sides respectively are provided with a location screw about lieing in the constant head tank front side on the regulating plate mounting surface, both sides still respectively are provided with a vertical regulating plate about the constant head tank front side, regulating plate trailing flank and regulating plate mounting surface laminating, two inboard that the regulating plate is relative are vertical spacing face, it is provided with the horizontally rectangular hole to correspond the location screw on the regulating plate, it passes the rectangular hole that corresponds and the location screw realizes fixing the regulating plate still to be provided with two positioning.
2. The valve disc end face precision detection method according to claim 1, characterized in that the distance between the detection hole and the first standard abutting surface is consistent in the radius of the valve disc end face circle, so that the valve disc end face circle can pass through a contact at the upper end of a detection rod of a flatness detection dial indicator in the diameter direction just at the time of detection, and the detection precision is improved better;
the detection table is provided with a first standard block, one side of the first standard block forms a first standard abutting surface, a first standard block positioning hole which is long in strip shape and perpendicular to the first standard abutting surface is arranged on the first standard block, and a first standard block fixing bolt which is downwards inserted into a corresponding through hole in the detection table is matched in the first standard block positioning hole and is used for fixing the first standard block.
3. The valve disc end surface precision detecting method according to claim 2, wherein the first standard block positioning holes are two in parallel and spaced.
4. The method for detecting the end face precision of the valve disc according to claim 1, wherein a second standard block is arranged on the detection table, one side of the second standard block forms the second standard abutting face, a second standard block positioning hole which is long in strip shape and perpendicular to the second standard abutting face is arranged on the second standard block, and a second standard block fixing bolt which is downwards inserted into a corresponding through hole in the detection table is matched in the second standard block positioning hole to fix the second standard block.
5. The method for detecting the end face precision of the valve disc according to claim 1, wherein a dial indicator fixing block is arranged below the detection hole of the detection table, a dial indicator assembling hole which is right opposite to the detection hole is vertically arranged in the dial indicator fixing block in a penetrating manner, a part, fixed with the dial plate, of the detection rod of the dial indicator for flatness detection is arranged in the dial indicator assembling hole in a penetrating manner, a fastening screw hole is further formed in the side direction of the dial indicator assembling hole on the dial indicator fixing block, and a fastening bolt is arranged in the fastening screw hole in a matching manner and used for fixing the dial indicator for flatness detection;
the detection platform comprises a detection plate horizontally arranged above, the upper surface of the detection plate is a detection plane, support plates are vertically arranged on two sides of the detection plate downwards, the lower ends of the support plates are fixed on a horizontally arranged bottom plate, and the dial indicator for flatness detection is located between the bottom plate and the detection plate.
6. The method for detecting the end face accuracy of a valve disc according to claim 1, wherein two positioning rollers are disposed in the positioning groove in the front-rear direction, the two positioning rollers are juxtaposed in the width direction of the positioning groove, a clamping groove for positioning the valve is formed between the upper surfaces of the two positioning rollers, a roller adjusting screw hole is horizontally formed in the valve positioning seat on one side of the positioning groove in the direction perpendicular to the positioning groove, the roller adjusting screw holes are at least two horizontally juxtaposed and are disposed opposite to the positioning rollers, and a roller adjusting bolt is screwed into the roller adjusting screw hole.
7. The method for detecting the end face precision of the valve plate according to claim 6, wherein an adjusting plate centering adjustment structure is further provided, the adjusting plate centering adjustment structure comprises two adjusting nuts correspondingly arranged in front of the two adjusting plates, screw holes of the adjusting nuts are horizontally arranged along the width direction of the positioning grooves, the adjusting nuts are respectively fixed on a nut seat, nut fixing screw holes are arranged on the adjusting plate corresponding to the nut seat, horizontal strip-shaped holes are formed in the nut seat corresponding to the nut fixing screw holes, and nut fixing bolts penetrate through the strip-shaped holes in the nut seat and the corresponding nut fixing screw holes to realize the fixation of the nut seat on the corresponding adjusting plate; the adjusting plate centering adjusting structure further comprises a bidirectional screw rod, and two sections of external threads are symmetrically arranged on the bidirectional screw rod and are respectively screwed in the two adjusting nuts.
CN201810494528.7A 2018-05-22 2018-05-22 Method for detecting end face precision of valve plate Expired - Fee Related CN108955502B (en)

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CN110187009B (en) * 2019-05-06 2024-06-11 重庆机电职业技术学院 Full-automatic feeding and discharging device for valve cone flaw detection
CN110926317B (en) * 2019-12-17 2020-09-15 颜镇源 Flatness detection device and detection method

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CN100588498C (en) * 2008-02-26 2010-02-10 安阳鑫盛机床股份有限公司 Self-centering machine tool center bracket system
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CN202229688U (en) * 2011-07-27 2012-05-23 浙江豪情汽车制造有限公司 Valve sealing surface bounce amount measuring tool
CN202869399U (en) * 2012-10-23 2013-04-10 安徽全柴动力股份有限公司 Testing fixture specially applied for detecting run-out quantity of internal combustion engine valve tappet end face
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