CN108534628B - Method for detecting circular runout of end face of valve disc by utilizing conical surface at rear side of valve disc - Google Patents
Method for detecting circular runout of end face of valve disc by utilizing conical surface at rear side of valve disc Download PDFInfo
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- CN108534628B CN108534628B CN201810349512.7A CN201810349512A CN108534628B CN 108534628 B CN108534628 B CN 108534628B CN 201810349512 A CN201810349512 A CN 201810349512A CN 108534628 B CN108534628 B CN 108534628B
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- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/003—Measuring of motor parts
Abstract
The invention discloses a method for detecting circular runout of an end face of a valve disc by utilizing a conical surface at the rear side of the valve disc, which is characterized in that after a valve to be detected is horizontally positioned, the valve to be detected is limited at one side in the axial direction deviating from the direction of the valve disc by virtue of point contact with the conical surface at the rear side of the valve disc in the left and right directions, then a dial indicator arranged along the length direction of the positioned valve is adopted to enable a contact of the dial indicator to be in point contact with a detection point at the end face of the positioned valve disc and generate certain pre-pressure, then the dial indicator is positioned, then the valve is rotated for one circle along the axial lead of the valve, and the difference between the maximum value and the minimum value of display reading of the dial indicator is read, namely the. The invention can realize the detection of the end face circular run-out tolerance of the valve, and has the advantages of simple, convenient and quick operation, accurate and reliable detection result and the like.
Description
Technical Field
The invention belongs to the technical field of production detection of automobile engine parts, and particularly relates to a method for detecting circular runout of an end face of a valve disc by utilizing a conical surface at the rear side of the valve disc.
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. During each operation of the engine, the intake and exhaust valves are opened and closed once each, and the valves are subjected to the pressure of the valve spring and the pressure of seating during the opening and closing of the valves. 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 circle run-out tolerance of the valve is 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 circular runout of the end face of the valve disc by using the conical surface at the rear side of the valve disc, which has the advantages of simple structure, convenience and quickness in operation and reliable detection, to realize the detection of the circular runout tolerance of the end face 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 circular runout of the valve disc by utilizing the conical surface at the rear side of the valve disc is simple, convenient and quick to operate, capable of achieving detection of the end face circular runout tolerance of the valve, accurate and reliable in detection result.
In order to solve the technical problems, the invention adopts the following technical scheme.
A method for detecting circular runout of an end face of a valve disc by utilizing a conical surface at the rear side of the valve disc is characterized in that after a valve to be detected is horizontally positioned, the valve to be detected is limited at one side in the axial direction deviating from the direction of the valve disc by virtue of point contact in the left direction and the right direction of the conical surface at the rear side of the valve disc, then a dial indicator arranged along the length direction of the positioned valve is adopted to enable a contact of the dial indicator to be in point contact with the detection point of the end face of the positioned valve disc and generate certain pre-pressure, then the dial indicator is positioned, then the valve is rotated for a circle along the axial lead of the valve, and the difference between the maximum value and the minimum value of the display reading of the dial indicator is read.
Thus, when the valve is produced, the conical surface is formed by the inner cavity of the lower die, and the end face of the valve plate is formed by stamping through the punch, so that the precision of the conical surface is far higher than that of the end face of the valve plate. Therefore, the method realizes the detection of the circular runout of the end face of the valve disc by using the contact limit with the conical surface as a reference point, and has the advantages of simple operation, accurate and reliable detection result and the like.
The method is realized by adopting the following detection equipment as an optimization, wherein the detection equipment comprises a base, and a valve positioning mechanism and a valve disc end face circular runout 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 valve is used, the valve to be detected is horizontally positioned by the valve positioning mechanism, the axial one-side limit of the valve departing 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 contact with the positioned detection point of the end face of the valve disc and generate certain pre-pressure, the pre-pressure reading is larger than the limit value of the circular runout tolerance of the end face 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 one-side limit of the valve is kept, and the difference between the maximum value and the minimum value of the reading displayed by the dial indicator is read out, namely the. 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 valve end face circle run-out tolerance detection device can detect the valve end face circle run-out tolerance, and has the advantages of being simple, convenient and fast to operate, accurate and reliable in detection result and the like.
Drawings
Fig. 1 is a schematic perspective view of a detection apparatus used in the practice of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Example (b): a method for detecting circular runout of end face of valve disk by using conical surface at back side of valve disk is characterized by that after the valve to be detected is horizontally positioned, it utilizes the point contact with left and right two directions of conical surface at back side of valve disk to implement single-side spacing of valve to be detected in the axial direction deviating from valve disk direction, then adopts a dial indicator set along the length direction of valve to make its contact with the detection point of end face of valve disk after positioning and produce a certain precompression to position the dial indicator, then rotates the valve along its self axial lead by one turn, and reads out the difference between maximum value and minimum value of display reading of dial indicator, i.e. the runout tolerance of end face of valve disk of said valve.
Thus, when the valve is produced, the conical surface is formed by the inner cavity of the lower die, and the end face of the valve plate is formed by stamping through the punch, so that the precision of the conical surface is far higher than that of the end face of the valve plate. Therefore, the method realizes the detection of the circular runout of the end face of the valve disc by using the contact limit with the conical surface as a reference point, and has the advantages of simple operation, accurate and reliable detection result and the like.
In this embodiment, the method is implemented by using the detection device shown in fig. 1, where the detection device includes a base 1, and the base 1 is provided with a valve positioning mechanism and a valve disk end face circular runout detection mechanism; 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 valve is used, the valve to be detected is horizontally positioned by the valve positioning mechanism, the axial one-side limit of the valve departing 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 contact with the positioned detection point of the end face of the valve disc and generate certain pre-pressure, the pre-pressure reading is larger than the limit value of the circular runout tolerance of the end face 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 one-side limit of the valve is kept, and the difference between the maximum value and the minimum value of the reading displayed by the dial indicator is read out, namely the. 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. A method for utilizing the back side conical surface of the valve disk to carry on the end face circle run-out detection of the valve disk, characterized by, after locating the valve to be detected horizontally, rely on and contact with the left and right two directions of the back side conical surface of the valve disk to realize the valve to be detected in deviating from the unilateral spacing of the axial of the valve disk direction, then use and position the dial indicator after the valve length direction set up make its contact and detection point contact of the end face of the valve disk after positioning and produce certain pre-pressure, then position the dial indicator after rotating the valve one turn along the self axial lead of the valve, read out the difference between maximum value and minimum value of the display reading of the dial indicator, namely the run-out tolerance of the end face of the valve disk of the valve;
the detection device comprises a base, wherein 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 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;
the valve positioning mechanism comprises a valve positioning seat, the upper surface of the valve positioning seat is provided with a positioning groove which penetrates along the front-back direction, the positioning groove is used for positioning a valve along the length direction of the positioning groove, the valve positioning seat is provided with a vertical adjusting plate mounting plane which is positioned at the front side of the positioning groove, the left side and the right side of the front side of the positioning groove on the adjusting plate mounting plane are respectively provided with a positioning screw hole, the left side and the right side of the front side of the positioning groove are respectively provided with a vertical adjusting plate, the rear side surface of the adjusting plate is attached to the adjusting plate mounting plane, the opposite inner sides of the two adjusting plates are vertical limiting surfaces, the corresponding positioning screw holes on the adjusting plates are provided with horizontal long holes, and two positioning bolts penetrate through the corresponding long holes and;
the dial indicator adjusting mechanism comprises a vertical rod vertically arranged on a dial indicator mounting seat, a dial indicator mounting hole is horizontally formed in the middle of the vertical rod, a detection rod of the dial indicator and a part for fixing a dial plate are inserted in the dial indicator mounting hole, a floating part for arranging a contact on the detection rod of the dial indicator extends out of the dial indicator mounting hole, a slit is formed in the vertical rod above the dial indicator mounting hole upwards, clamping bolt holes and corresponding clamping bolts are formed in the vertical rods on two sides of the slit in a direction perpendicular to the slit penetrating direction, and the clamping bolts are used for clamping the slit to fix the dial indicator;
be provided with two positioning roller along the fore-and-aft direction in the constant head tank, two positioning roller 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, have seted up cylinder adjusting screw along perpendicular to constant head tank direction level on the valve positioning seat of constant head tank one side, cylinder adjusting screw is two that the level set up side by side and just to positioning roller setting, connects the cooperation soon on the cylinder adjusting screw to have cylinder adjusting bolt.
2. The method for detecting end-face circular runout of a valve disc by using the conical surface at the rear side of the valve disc as claimed in claim 1, wherein the roller adjusting screw hole is arranged opposite to the position of the axis of the positioning roller.
3. The method for detecting the end face circular runout of the valve disc by utilizing the conical surface at the rear side of the valve disc as claimed in claim 1, wherein the length of the positioning roller is less than the length of the rod part of the valve to be detected.
4. The method for detecting the end face circular runout of the valve disc by utilizing the conical surface at the rear side of the valve disc as claimed in claim 1, wherein the edge of the front end face of the positioning roller is provided with a chamfer.
5. The method for detecting the end face circular runout of the valve disc by utilizing the conical surface at the rear side of the valve disc as claimed in claim 1, 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 plates corresponding to the nut seats, horizontal long holes are formed in the nut seats corresponding to the nut fixing screw holes, and nut fixing bolts penetrate through the long 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.
6. The method for detecting the end face circular runout of the valve disc by utilizing the conical surface at the rear side of the valve disc as claimed in claim 5, wherein a rotating knob is arranged at one end part of the bidirectional screw rod.
7. The method for detecting the end face circular runout of the valve disc by utilizing the conical surface at the back side of the valve disc as claimed in claim 5, wherein a screw seat is arranged at the middle part of the bidirectional screw, the screw seat is fixed on the base, a screw through hole is horizontally arranged on the screw seat in a penetrating way, and the bidirectional screw is rotatably matched in the screw through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810349512.7A CN108534628B (en) | 2018-04-18 | 2018-04-18 | Method for detecting circular runout of end face of valve disc by utilizing conical surface at rear side of valve disc |
Applications Claiming Priority (1)
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| CN108534628B (en) * | 2018-04-18 | 2020-10-09 | 长江师范学院 | Method for detecting circular runout of end face of valve disc by utilizing conical surface at rear side of valve disc |
| CN109323639A (en) * | 2018-10-19 | 2019-02-12 | 嘉兴市易嘉机械有限公司 | A kind of circle jitter detection apparatus of the circumferential side wall of disk |
| CN110026704B (en) * | 2019-05-30 | 2023-09-22 | 洛阳理工学院 | Device for transferring and welding detection surface of cylindrical weldment on roller frame |
| CN116753808B (en) * | 2023-08-18 | 2023-11-28 | 智龙直线(瑞金)科技有限公司 | Device, method and correction method for measuring special-shaped groove of contact type sliding rail |
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