CN108759631A - Valve retainer detection suit and its valve retainer roundness of external circle error detecting apparatus - Google Patents

Abstract

The invention discloses a roundness error detection device for the outer circle of a valve disc, which is characterized in that it comprises a detection table, on which a fixed measuring head is fixedly arranged at one end, and a fixed measuring head is fixedly arranged at the other end, which can move along the direction facing the fixed measuring head. The movable measuring head, the opposite side of the fixed measuring head and the movable measuring head is fixed with a stopper so that a detection station is formed between the stopper, the fixed measuring head and the movable measuring head. The other end is also provided with a dial indicator installation platform, and a dial indicator for roundness detection is arranged on the dial indicator installation platform facing the movable measuring head. The invention also discloses a valve disc detection kit comprising the detection device. The invention has simple structure, convenient and fast operation, can be used to detect the roundness error of the outer circle of the valve disc, and further detect the runout tolerance of the end face of the valve disc, and make the detection result accurate and reliable.

Description

Valve disc detection kit and valve disc outer roundness error detection device

technical field

The invention relates to the technical field of production detection of automobile engine parts, in particular to a valve disc detection kit and a valve disc outer circle roundness error detection device.

Background technique

The automobile engine can convert the chemical energy of fuel or other forms of energy into mechanical energy to provide power for the automobile. It is the heart of the automobile and belongs to a technology-intensive product. With the development of our country's economy, while the demand for automobiles is increasing day by day, the automobile industry has developed rapidly, and people's requirements for the performance of automobile engines are also getting higher and higher.

In an automobile engine, the intake and exhaust valve is a component composed of a disc part and a rod part coaxial with the disc part. It is one of the key parts of the car engine and is the door of the engine combustion chamber. The key basic parts that seal the intake and exhaust ports during the working process are used to block the airflow passage and control the gas exchange of the engine. In every working process of the engine, the intake valve and the exhaust valve are opened and closed once. When the valve is opened and closed, the valve bears the pressure of the valve spring and the pressure when it is seated. Especially in the compression and power strokes, the intake valve and exhaust valve play a role in sealing the combustion chamber. Therefore, the quality of the valve has an important impact on the performance and life of the engine.

The processing accuracy and structure of the valve play a decisive role in the movement of the engine valve train, and its quality may have a great impact on the performance and life of the entire engine. In the production process of the intake and exhaust valves of internal combustion engines, the outer circle of the valve disc is the main positioning reference for the next smooth turning arc process. In order to ensure the processing requirements of the next smooth turning arc process, it is necessary to control the quality of the outer circle of the valve disc .

However, in the existing valve production enterprises, some valve production enterprises mainly rely on a roundness meter to detect the outer circle of the valve disc. Because of the complex positioning reference, the valve surface is easily scratched, the inspection cost is high, and the time required is long, so the inspection frequency and batch size of the outer circle of the valve disc are very limited.

In addition, the runout tolerance of the end face of the valve is a key parameter of the valve, which is closely related to the sealing effect of the valve. The runout tolerance of the end face of the valve disc is a position tolerance item used to control the surface contour elements of the end face of the valve disc relative to the valve axis to maintain a certain accuracy. Runout tolerance is different from orientation and positioning tolerance, it is a given tolerance item based on a specific detection method. Since the runout tolerance has a comprehensive control effect on the measured elements, it not only has a control effect on the position error, but also can control a certain shape error; it can fully reflect the functional requirements of the part, so it is widely used in production. And in the existing valve production enterprises, some valve production enterprises mainly rely on the runout detector to detect the runout of the end face of the valve disc. Because of the high cost of inspection and the long time required, the valve end face beating and the number of inspections and batches are very limited.

Therefore, how to design a valve disc detection equipment with simple structure, convenient operation, and reliable detection to realize the detection of the roundness error of the outer circle of the valve disc and the detection of the runout tolerance of the end face of the valve disc has become a problem to be considered and solved.

Contents of the invention

The technical problem to be solved by the present invention is: how to provide a valve disc detection kit and its valve disc outer roundness error detection device with simple structure, convenient and quick operation, which can be used to detect the outer roundness error of the valve disc, and Further, it can be used to realize the detection of the runout tolerance of the end face of the valve disc, and the detection result is accurate and reliable.

In order to solve the above technical problems, the present invention adopts the following technical solutions.

A valve disc outer roundness error detection device is characterized in that it includes a horizontally arranged base plate, a detection platform is fixedly installed at one end of the base plate, a detection plane in the horizontal direction is formed on the upper surface of the detection platform, and a detection platform is fixed at one end of the detection plane. One fixed measuring head, the other end is provided with a movable measuring head which can move along the direction facing the fixed measuring head, the opposite end of the fixed measuring head and the movable side head has vertical end faces parallel to each other and is used to realize the outer circular surface of the valve disc The abutment of the fixed probe and the movable probe is fixed with a stopper on the opposite side, so that a detection station is formed between the stopper, the fixed probe and the movable probe, and the side of the detection station away from the stopper is The open side where the air supply door panel is snapped in; the bottom plate is located at the other end facing the testing platform, and there is also a dial indicator installation platform, which is located on the outer side of the end of the movable probe away from the fixed probe and facing directly on it. The movable measuring head is provided with a dial gauge fixing hole; it also includes a dial gauge for roundness detection, the fixed part of the dial gauge detection rod for roundness detection is plugged and fitted in the dial gauge fixing hole, and the dial gauge mounting platform The screw hole facing the dial gauge fixing hole is also provided with fastening bolts to realize the fixing of the dial gauge for roundness detection.

In this way, when in use, first attach the outer circular end face of the standard sample valve disc to the detection plane, and push it into the detection station from the open side, adjust the movable probe so that the movable probe, the fixed probe and the stopper respectively and then adjust the installation position of the dial gauge for roundness detection, so that the contact of the dial gauge for roundness detection and the outer end of the movable probe abut and the dial gauge is pre-set. If the reading is greater than the maximum tolerance of the outer circle of the valve disc, fix the dial indicator for roundness testing by fastening the bolts; remove the valve standard sample, and attach the outer circle end surface of the valve disc of the valve to be tested to the test plane , and push it into the detection station from the open side, so that the outer circular surface of the valve disc of the valve to be tested is in contact with the movable probe, the fixed probe and the stopper, and then rotate the valve to be tested for a circle, observe and record the roundness Changes in the readings of the dial gauge used for detection, that is, the roundness error of the outer circle of the valve disc of the valve to be detected is obtained. Therefore, the roundness error detection of the outer circle of the valve disc can be realized conveniently, quickly, accurately and reliably.

As an optimization, multiple grooves are arranged side by side at intervals on the detection plane of the detection station. In this way, the contact area between the end face of the valve and the detection plane is reduced during the detection process, and the influence of unevenness of the end face of the valve on the accuracy of the detection result is reduced.

As an optimization, there is also a guiding structure arranged between the movable measuring head and the testing table along the direction facing the fixed measuring head. In this way, it can be better ensured that the detection force direction of the dial indicator for roundness detection is consistent with the diameter direction, so as to ensure that the detection result is more accurate and reliable.

As an optimization, the guide structure includes a strip-shaped dovetail groove arranged on the detection platform, the length direction of the dovetail groove is set in the direction of the fixed measuring head, and also includes a dovetail-shaped matching part located under the movable measuring head, the matching part Slidably fits within the dovetail slot. Such a guiding structure has the advantages of simple structure and reliable guiding.

Further, the guide structure also includes a vertical guide bolt, the lower end of the guide bolt is screwed into the screw hole at the bottom of the dovetail groove, and the upper part of the guide bolt is slidably fitted into the elongated guide hole on the movable measuring head. In this way, the guide bolt can not only further guide the movable probe, but also can rely on the guide bolt to lock and fix the movable probe when the movable probe does not need to slide during transportation to avoid slipping out and loss.

Still further, a return spring is arranged in abutment between the outer end surface of the movable measuring head and the dial indicator mounting platform. In this way, during the detection process, the return spring can be relied upon to ensure that the outer circular surface of the valve disc to be detected is always in contact with the fixed measuring head and the movable measuring head at the same time. Avoid the detection error caused by the lack of elasticity of the dial gauge contact, and ensure accurate and reliable detection results.

Further, both the fixed measuring head and the stopper are provided with elongated vertical holes along the direction facing the detection station, and are fixed on the detection platform by means of bolts passing through the vertical holes downward. In this way, the distance between the fixed measuring head and the stopper and the detection station can be adjusted, so that it can be adapted to the detection of valve discs of different sizes and models.

The present invention also discloses a valve disc detection kit, the valve disc detection kit includes the aforementioned valve disc outer roundness error detection device, and also includes a valve disc end face circular runout detection device, the valve disc end face circular runout detection device , including a base, on which a valve positioning mechanism and a valve disc end face circular beating detection mechanism are arranged; the valve positioning mechanism is used to realize the horizontal positioning of the valve to be detected and realize the positioning of the positioned valve in the axial direction away from the direction of the valve disc The unilateral limit of the valve disc end face circular runout detection mechanism includes a dial gauge mounting seat, and a horizontally arranged circular runout detection dial gauge is installed on the dial gauge mounting seat and the circular runout detection dial gauge The contact is set facing the position of the detection point deviated from the center of the circle on the end surface of the positioned valve disc, and the dial gauge mounting seat is provided with a dial gauge adjustment mechanism for adjusting the axially fixed position of the dial gauge used for the detection of circular runout.

When used in this way, the valve to be detected is positioned horizontally by the valve positioning mechanism and the unilateral limit of the valve in the axial direction away from the direction of the valve disc is realized. In this way, the axial position of the dial indicator is adjusted to make the contact and the end face of the valve disc after positioning contact with the detection point and generate a certain pre-pressure, the pre-pressure reading is greater than the limit value of the valve disc end face circle runout tolerance, and then rotate the valve one circle along the axis of the valve itself under the condition of maintaining the unilateral limit of the valve axial direction, read The difference between the maximum value and the minimum value of the reading displayed on the dial indicator is the runout tolerance of the valve disc end face of the valve. Therefore, it has the advantages of simple structure, low cost, convenient and quick detection, accurate and reliable.

As an optimization, the dial indicator adjustment mechanism includes a vertical bar that is vertically arranged on the dial indicator mounting seat, and the middle part of the vertical bar is horizontally provided with a dial indicator mounting hole, and the detection of the circle runout is performed with a dial indicator. The fixed part of the rod and the dial is plugged into the mounting hole of the dial indicator, and the floating part used to set the contact on the detection rod of the dial indicator for circular runout detection protrudes out of the mounting hole of the dial indicator, above the mounting hole of the dial gauge There is a slit upwards in the vertical bar of the slit, and the vertical bars on both sides of the slit are provided with clamping bolt holes and corresponding clamping bolts along the vertical direction through the slit. The clamping bolts are used to clamp the slit to realize Fixing of the dial indicator for circular runout detection.

In this way, after the clamping screw is loosened, the front and rear positions of the dial gauge detection rod and the dial gauge installation hole can be adjusted, and then fixed after the adjustment is in place, so as to ensure that the dial gauge installation position can form a certain position on the end face of the valve disc after positioning. the pre-pressure. At the same time, the structure has the advantages of simple structure, convenient and quick adjustment, and the like.

As an optimization, the valve positioning mechanism includes a valve positioning seat, the upper surface of the valve positioning seat is provided with a positioning groove penetrating along the front and rear directions, the positioning groove is used to realize the positioning of the valve along the length direction of the positioning groove, and the valve positioning seat has a The vertical adjustment plate installation plane located on the front side of the positioning slot, the left and right sides of the adjustment plate installation plane located on the front side of the positioning slot are respectively provided with a positioning screw hole, and the left and right sides of the front side of the positioning slot are respectively provided with a vertical screw hole The adjustment plate, the rear side of the adjustment plate is fitted with the installation plane of the adjustment plate, the opposite inner side of the two adjustment plates is a vertical limit surface, the corresponding positioning screw holes on the adjustment plate are provided with horizontal long holes, and there are also two The positioning bolts pass through the corresponding elongated holes and the positioning screw holes to fix the adjusting plate.

In this way, when in use, first loosen the positioning bolt, position the valve in the positioning slot and the valve disc protrudes from the positioning slot, then move the adjustment plate in the left and right directions to make the limit surface contact with the tapered surface behind the valve disc, and then lock Tighten the positioning bolts to fix the adjusting plate, so that the axial position of the valve can be realized conveniently and quickly. In this way, the position is limited by the contact between the adjustment plate and the tapered surface behind the valve disc. When the valve is produced, the tapered surface is generally formed by the inner cavity of the lower die, and the end surface of the valve disc is formed by punching, so the cone The precision of the shape surface will be much higher than the precision of the end surface of the valve disc. Therefore, the limit is achieved by point contact between the limit surface of the adjustment plate and the conical surface behind the valve disc, and then the contact position between the limit surface of the adjustment plate and the conical surface behind the valve disc rotates to form a circular line during the rotation of the valve, which can ensure The accuracy of the contact circle line can further reduce the error, and better ensure that the detection result is the data reflecting the flatness of the end surface of the valve disc.

Further, two positioning rollers are arranged in the positioning groove along the front and rear directions, and the two positioning rollers are arranged side by side along 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. One side of the positioning groove There are roller adjustment screw holes horizontally arranged on the valve positioning seat of the valve along the direction perpendicular to the positioning groove. The roller adjustment screw holes are at least two horizontally arranged side by side and facing the positioning roller. The roller adjustment screw holes are screwed and fitted with roller adjustment bolts. .

In this way, the positioning of the valve is realized by relying on two positioning rollers, the structure is simple, and the positioning is convenient, fast and reliable. The two roller adjustment bolts set at the same time can adjust the tightness between the two rollers, and then adjust the width of the clamping groove formed between the upper surfaces of the two positioning rollers, and then adjust the height of the positioned valve, so the dial gauge When the height position is fixed, it is convenient to adjust the height position of the valve to ensure that the distance between the contact point of the dial indicator and the end face of the valve disc from the center of the circle is a suitable position for realizing the end face circle runout detection, ensuring the detection accuracy, and has the advantages of convenient and quick adjustment.

Further, the roller adjustment screw hole is set directly opposite to the position of the axis line of the positioning roller. In this way, it is more convenient to abut and apply force when the positioning roller is adjusted.

Further, the length of the positioning roller is smaller than the length of the stem of the valve to be detected. In this way, when the valve is rotated during the detection process, the valve can be rotated by relying on the part of the tail end of the valve stem protruding from the positioning roller and suspended in the air, which is more convenient to rotate the valve and can better ensure that the positioning state of the valve does not change during rotation, so as to improve the detection accuracy. .

Further, the edge of the front end of the positioning roller is provided with chamfers. This can better prevent the front end surface of the positioning roller from interfering with the tapered surface behind the valve disc of the valve to be tested, which will affect the detection accuracy.

Further, an adjustment plate centering adjustment structure is also provided, and the adjustment plate centering adjustment structure includes two adjustment nuts correspondingly arranged in front of the two adjustment plates, the screw holes of the adjustment nuts are horizontally arranged along the width direction of the positioning groove, and the adjustment The nuts are respectively fixed on a nut seat, and the adjusting plate corresponding to the nut seat is provided with a nut fixing screw hole, and the corresponding nut fixing screw hole on the nut seat is provided with a horizontal long hole, and a nut fixing bolt is also provided to pass through the nut seat. The long strip holes and the corresponding nut fixing screw holes realize the fixing of the nut seat on the corresponding adjustment plate; Screwed in two adjusting nuts.

In this way, centering can be carried out by relying on the centering adjustment structure of the adjustment plate before inspection, and adjustments can be made when inspecting different types of polished rods. Specifically, when centering, first loosen the nut fixing bolts and positioning bolts, and then after determining the positions of the two positioning rollers, put a polished rod between the two positioning rollers for positioning, and then move the two adjustment plates to make the two positioning rollers The relative limiting surfaces of the two adjusting plates are in contact with the polished rod, and then the positioning bolt is rotated to fix the adjusting plate, and then the nut fixing bolt is rotated to fix the nut seat, and the polished rod is removed to achieve centering. When detecting valves of different sizes after centering, you can rotate the two-way screw so that the two adjustment plates follow the corresponding adjustment nuts to move closer in the same direction or separate in the opposite direction, so as to adjust the two adjustment plates according to different models and sizes of valves. The width distance between the plates can be just in contact with the tapered position of the valve disc rear end of the valve to be tested to realize the detection and ensure the detection accuracy. Furthermore, it is ensured that the two adjustment plates can be adjusted quickly while maintaining the alignment, and the convenience and reliability of the adjustment can be improved.

Further, a rotating knob is provided at one end of the two-way lead screw. This makes it easy to rotate and adjust.

Further, a lead screw seat is provided in the middle of the bidirectional lead screw, and the lead screw seat is fixed on the base, and a lead screw through hole is horizontally penetrating through the lead screw seat, and the bidirectional lead screw is rotatably fitted in the lead screw through hole.

In this way, the height position of the lead screw is fixed by the lead screw seat, making it more convenient to adjust the operation, and avoiding the displacement of the adjustment plate when the lead screw is adjusted, which affects the subsequent detection accuracy.

Furthermore, an axial position limiting structure of the lead screw is provided between the lead screw seat and the lead screw to limit the axial displacement of the lead screw. In this way, the left and right positions of the lead screw can be better limited, and the left and right displacement of the lead screw during adjustment can be better avoided to drive the adjustment plate to move, ensuring the symmetry and reliability of the adjustment. In practice, the axial position limiting structure of the lead screw can be obtained from the concave-convex fitting structure arranged along the circumferential direction between the inner wall of the through hole of the lead screw and the corresponding outer wall of the lead screw.

To sum up, the present invention has a simple structure, convenient and fast operation, and can be used to detect the roundness error of the outer circle of the valve disc, and further detect the runout tolerance of the end face of the valve disc, and make the detection results accurate and reliable.

Description of drawings

Fig. 1 is a three-dimensional structure schematic diagram of a valve disc outer circle error detection device according to the present invention.

Fig. 2 is a three-dimensional structural schematic diagram of the valve disc end surface circular runout detection device of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

Example:

This embodiment discloses a valve disc detection set, which includes the aforementioned valve disc outer circle roundness error detection device, and also includes a valve disc end face circle runout detection device.

Wherein, the valve disc outer circle roundness error detection device, as shown in Fig. 1, includes a horizontally arranged base plate 1', and a detection platform 2' is fixedly installed on one end of the base plate 1', and the upper surface of the detection platform 2' forms a horizontal One end of the detection plane is fixed with a fixed probe 3', and the other end is equipped with a movable probe 4' that can move in the direction facing the fixed probe. The fixed probe 3' and the movable side head 4 'The opposite end has vertical end faces parallel to each other and is used to realize the abutment with the outer circular surface of the valve disc. A stopper 5' is fixedly arranged on the opposite side of the fixed probe 3' and the movable probe 4' so that A detection station is formed between the stopper, the fixed probe and the movable probe, and the side of the detection station away from the stopper is the open side where the air supply valve plate is snapped in; the other end of the bottom plate 1′ facing the detection platform is also provided with a A dial indicator mounting table 6', the dial indicator mounting table 6' is located on the outside of the end of the movable probe away from the fixed probe and is provided with a dial indicator fixing hole facing the movable probe; it also includes a roundness detection The dial gauge 7', the fixed part of the dial gauge 7' detection rod for roundness detection is plugged and fitted in the dial gauge fixing hole, and the dial gauge mounting platform 6' is also provided with a hole facing the dial gauge fixing hole. The screw holes are matched with fastening bolts 8' to fix the dial indicator for roundness detection.

In this way, when in use, first attach the outer circular end face of the standard sample valve disc to the detection plane, and push it into the detection station from the open side, adjust the movable probe so that the movable probe, the fixed probe and the stopper respectively and then adjust the installation position of the dial gauge for roundness detection, so that the contact of the dial gauge for roundness detection and the outer end of the movable probe abut and the dial gauge is pre-set. If the reading is greater than the maximum tolerance of the outer circle of the valve disc, fix the dial indicator for roundness testing by fastening the bolts; remove the valve standard sample, and attach the outer circle end surface of the valve disc of the valve to be tested to the test plane , and push it into the detection station from the open side, so that the outer circular surface of the valve disc of the valve to be tested is in contact with the movable probe, the fixed probe and the stopper, and then rotate the valve to be tested for a circle, observe and record the roundness Changes in the readings of the dial gauge used for detection, that is, the roundness error of the outer circle of the valve disc of the valve to be detected is obtained. Therefore, the roundness error detection of the outer circle of the valve disc can be realized conveniently, quickly, accurately and reliably.

Wherein, a plurality of grooves 9' are arranged side by side at intervals on the detection plane of the detection station. In this way, the contact area between the end face of the valve and the detection plane is reduced during the detection process, and the influence of unevenness of the end face of the valve on the accuracy of the detection result is reduced.

Wherein, there is also a guiding structure arranged between the movable measuring head and the testing platform along the direction facing the fixed measuring head. In this way, it can be better ensured that the detection force direction of the dial indicator for roundness detection is consistent with the diameter direction, so as to ensure that the detection result is more accurate and reliable.

Wherein, the guide structure includes a strip-shaped dovetail groove 10' arranged on the detection platform, and the length direction of the dovetail groove 10' is set in the direction of the fixed measuring head, and also includes a dovetail-shaped matching part located under the movable measuring head , the matching portion is slidably fitted in the dovetail groove 10'. Such a guiding structure has the advantages of simple structure and reliable guiding.

Wherein, the guide structure also includes a vertically arranged guide bolt, the lower end of which is screwed into the screw hole at the bottom of the dovetail groove, and the upper part of the guide bolt is slidably fitted into the elongated guide hole on the movable measuring head. In this way, the guide bolt can not only further guide the movable probe, but also can rely on the guide bolt to lock and fix the movable probe when the movable probe does not need to slide during transportation to avoid slipping out and loss.

Wherein, a return spring 11' is arranged in abutment between the outer end surface of the movable measuring head and the dial indicator installation platform. In this way, during the detection process, the return spring can be relied upon to ensure that the outer circular surface of the valve disc to be detected is always in contact with the fixed measuring head and the movable measuring head at the same time. Avoid the detection error caused by the lack of elasticity of the dial gauge contact, and ensure accurate and reliable detection results.

Wherein, the fixed measuring head 3' and the stopper 5' are provided with elongated vertical holes along the direction facing the detection station, and are fixed on the detection platform by means of bolts passing through the vertical holes downward. In this way, the distance between the fixed measuring head and the stopper and the detection station can be adjusted, so that it can be adapted to the detection of valve discs of different sizes and models.

Wherein, the valve disc end face circular runout detection device, as shown in Fig. 2, includes a base 1, wherein, the base 1 is provided with a valve positioning mechanism and a valve disc end face circular runout detection mechanism; the valve positioning mechanism is used to realize the Detect the horizontal positioning of the valve and realize the unilateral limit of the positioned valve in the axial direction away from the direction of the valve disc. The valve disc end surface circular runout detection mechanism includes a dial indicator mounting seat 2 2 is installed with a horizontal runout detection dial gauge 3 and the dial gauge contact for circular runout detection is set against the position of the detection point on the end surface of the positioned valve disc that deviates from the center of the circle. The dial gauge mounting base 2 A dial gauge adjustment mechanism is provided for adjusting the fixed position of the dial gauge used for detecting circular runout along the axial direction.

When used in this way, the valve to be detected is positioned horizontally by the valve positioning mechanism and the unilateral limit of the valve in the axial direction away from the direction of the valve disc is realized. In this way, the axial position of the dial indicator is adjusted to make the contact and the end face of the valve disc after positioning contact with the detection point and generate a certain pre-pressure, the pre-pressure reading is greater than the limit value of the valve disc end face circle runout tolerance, and then rotate the valve one circle along the axis of the valve itself under the condition of maintaining the unilateral limit of the valve axial direction, read The difference between the maximum value and the minimum value of the reading displayed on the dial indicator is the runout tolerance of the valve disc end face of the valve. Therefore, it has the advantages of simple structure, low cost, convenient and quick detection, accurate and reliable.

Wherein, the dial indicator adjustment mechanism includes a vertical bar 4 vertically arranged on the dial indicator mounting seat, and the middle part of the vertical bar 4 is provided with a dial indicator mounting hole horizontally, and the dial indicator 3 is used for the circle runout detection. The fixed part of the detection rod and the dial is plugged into the installation hole of the dial gauge. The floating part of the detection rod of the dial gauge 3 for circular runout detection is used to set the contact protruding from the installation hole of the dial gauge. There is a slit upwards in the vertical rod above the installation hole, and the vertical rods on both sides of the slit are provided with clamping bolt holes and corresponding clamping bolts 5 along the vertical direction of the slit. The clamping bolt 5 is used to realize the slit Clamping to realize the fixation of the dial gauge 3 for circular runout detection.

In this way, after the clamping screw is loosened, the front and rear positions of the dial gauge detection rod and the dial gauge installation hole can be adjusted, and then fixed after the adjustment is in place, so as to ensure that the dial gauge installation position can form a certain position on the end face of the valve disc after positioning. the pre-pressure. At the same time, the structure has the advantages of simple structure, convenient and quick adjustment, and the like.

Wherein, the valve positioning mechanism includes a valve positioning seat 6, the upper surface of the valve positioning seat 6 is provided with a positioning groove penetrating along the front and rear directions, the positioning groove is used to realize the positioning of the valve along the length direction of the positioning groove, and the valve positioning seat has A vertical adjustment plate installation plane located on the front side of the positioning slot, the left and right sides of the adjustment plate installation plane located on the front side of the positioning slot are respectively provided with a positioning screw hole, and the left and right sides of the front side of the positioning slot are respectively provided with a vertical screw hole. The adjustment plate 7, the rear side of the adjustment plate 7 is fitted with the installation plane of the adjustment plate, the opposite inner sides of the two adjustment plates 7 are vertical limit surfaces, and the corresponding positioning screw holes on the adjustment plate 7 are provided with horizontal long holes. Two positioning bolts 8 are also provided to pass through the corresponding elongated holes and positioning screw holes to fix the adjusting plate 7 .

In this way, when in use, first loosen the positioning bolt, position the valve in the positioning slot and the valve disc protrudes from the positioning slot, then move the adjustment plate in the left and right directions to make the limit surface contact with the tapered surface behind the valve disc, and then lock Tighten the positioning bolts to fix the adjusting plate, so that the axial position of the valve can be realized conveniently and quickly. In this way, the position is limited by the contact between the adjustment plate and the tapered surface behind the valve disc. When the valve is produced, the tapered surface is generally formed by the inner cavity of the lower die, and the end surface of the valve disc is formed by punching, so the cone The precision of the shape surface will be much higher than the precision of the end surface of the valve disc. Therefore, the limit is achieved by point contact between the limit surface of the adjustment plate and the conical surface behind the valve disc, and then the contact position between the limit surface of the adjustment plate and the conical surface behind the valve disc rotates to form a circular line during the rotation of the valve, which can ensure The accuracy of the contact circle line can further reduce the error, and better ensure that the detection result is the data reflecting the flatness of the end surface of the valve disc.

Wherein, two positioning rollers 9 are arranged in the positioning groove along the front and rear directions, and the two positioning rollers 9 are arranged side by side along 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. On the valve positioning seat on the side, there is a roller adjustment screw hole horizontally along the direction perpendicular to the positioning groove. At least two roller adjustment screw holes are arranged in parallel and facing the positioning roller. Bolt 10.

In this way, the positioning of the valve is realized by relying on two positioning rollers, the structure is simple, and the positioning is convenient, fast and reliable. The two roller adjustment bolts set at the same time can adjust the tightness between the two rollers, and then adjust the width of the clamping groove formed between the upper surfaces of the two positioning rollers, and then adjust the height of the positioned valve, so the dial gauge When the height position is fixed, it is convenient to adjust the height position of the valve to ensure that the distance between the contact point of the dial indicator and the end face of the valve disc from the center of the circle is a suitable position for realizing the end face circle runout detection, ensuring the detection accuracy, and has the advantages of convenient and quick adjustment.

Wherein, the roller adjusting screw hole is set up against the position of the center line of the positioning roller 9. In this way, it is more convenient to abut and apply force when the positioning roller is adjusted.

Wherein, the length of the positioning roller 9 is smaller than the length of the stem of the valve to be detected. In this way, when the valve is rotated during the detection process, the valve can be rotated by relying on the part of the tail end of the valve stem protruding from the positioning roller and suspended in the air, which is more convenient to rotate the valve and can better ensure that the positioning state of the valve does not change during rotation, so as to improve the detection accuracy. .

Wherein, the edge of the front end of the positioning roller 9 is provided with chamfers. This can better prevent the front end surface of the positioning roller from interfering with the tapered surface behind the valve disc of the valve to be tested, which will affect the detection accuracy.

Wherein, an adjustment plate centering adjustment structure is also provided, and the adjustment plate centering adjustment structure includes two adjustment nuts 11 correspondingly arranged in front of the two adjustment plates, and the screw holes of the adjustment nuts 11 are horizontally arranged along the width direction of the positioning groove. Adjusting nuts are respectively fixed on a nut seat 12, nut seat 12 corresponding adjustment plate is provided with a nut fixing screw hole, the corresponding nut fixing screw hole on the nut seat is provided with a horizontal strip hole, also provided with a nut fixing bolt 13 through Through the elongated holes on the nut seat and the corresponding nut fixing screw holes, the nut seat 12 is fixed on the corresponding adjustment plate 7; Two sections of external threads are respectively screwed into two adjusting nuts.

In this way, centering can be carried out by relying on the centering adjustment structure of the adjustment plate before inspection, and adjustments can be made when inspecting different types of polished rods. Specifically, when centering, first loosen the nut fixing bolts and positioning bolts, and then after determining the positions of the two positioning rollers, put a polished rod between the two positioning rollers for positioning, and then move the two adjustment plates to make the two positioning rollers The relative limiting surfaces of the two adjusting plates are in contact with the polished rod, and then the positioning bolt is rotated to fix the adjusting plate, and then the nut fixing bolt is rotated to fix the nut seat, and the polished rod is removed to achieve centering. When detecting valves of different sizes after centering, you can rotate the two-way screw so that the two adjustment plates follow the corresponding adjustment nuts to move closer in the same direction or separate in the opposite direction, so as to adjust the two adjustment plates according to different models and sizes of valves. The width distance between the plates can be just in contact with the tapered position of the valve disc rear end of the valve to be tested to realize the detection and ensure the detection accuracy. Furthermore, it is ensured that the two adjustment plates can be adjusted quickly while maintaining the alignment, and the convenience and reliability of the adjustment can be improved.

Wherein, a rotating knob 15 is provided at one end of the two-way lead screw 14 . This makes it easy to rotate and adjust.

Wherein, a lead screw seat 16 is arranged in the middle of the two-way lead screw, and the lead screw seat 16 is fixed on the base 1, and a lead screw through hole is horizontally penetrated on the lead screw seat 16, and the two-way lead screw 14 is rotatably matched in the lead screw through hole. inside the hole.

In this way, the height position of the lead screw is fixed by the lead screw seat, making it more convenient to adjust the operation, and avoiding the displacement of the adjustment plate when the lead screw is adjusted, which affects the subsequent detection accuracy.

Wherein, an axial position limiting structure of the lead screw for limiting the axial displacement of the lead screw is arranged between the lead screw seat and the lead screw. In this way, the left and right positions of the lead screw can be better limited, and the left and right displacement of the lead screw during adjustment can be better avoided to drive the adjustment plate to move, ensuring the symmetry and reliability of the adjustment. In practice, the axial position limiting structure of the lead screw can be obtained from the concave-convex fitting structure arranged along the circumferential direction between the inner wall of the through hole of the lead screw and the corresponding outer wall of the lead screw.

Claims (10)

1. a kind of valve retainer roundness of external circle error detecting apparatus, which is characterized in that including a horizontally disposed bottom plate, on bottom plate One end is fixedly installed monitor station, and monitor station upper surface forms the detection plane of horizontal direction, detects one end fixation in plane and sets It sets there are one fixed gauge head, there are one can be fixed to survey along the movable gauge head that face fixation gauge head direction moves for other end setting Head one end opposite with active side head has the inwall of vertical being mutually parallel and for realizing the abutting with valve retainer periphery, Gu The side fixed setting of location survey head and movable gauge head relative direction is there are one block and makes block and fixed gauge head and activity Detection station is formed between gauge head, detection station is the open sides being caught in for valve retainer away from block side；It is located at just on bottom plate The other end of monitor station is also set up there are one amesdial erecting bed, amesdial erecting bed is located at movable gauge head and deviates from fixed gauge head On the outside of one end and face activity gauge head is provided with amesdial mounting hole on it；Further include a roundness measurement amesdial, circle The fixed part for spending detection amesdial detection bar is mating in amesdial mounting hole, is additionally provided on amesdial erecting bed The screw hole of face amesdial mounting hole is equipped with the fixation that fastening bolt realizes roundness measurement amesdial.

2. valve retainer roundness of external circle error detecting apparatus as described in claim 1, which is characterized in that the detection of detection station is flat Spacing parallel arranging is provided with multiple grooves on face.

3. valve retainer roundness of external circle error detecting apparatus as described in claim 1, which is characterized in that movable gauge head and monitor station Between also there is the guide frame that the setting of gauge head direction is fixed along face.

4. valve retainer roundness of external circle error detecting apparatus as claimed in claim 3, which is characterized in that the guide frame includes The dovetail groove for a strip being arranged on monitor station, dovetail groove length direction face fix the setting of gauge head direction, further include The auxiliary section of swallow-tail form below movable gauge head, auxiliary section are slidably fit into dovetail groove.

5. valve retainer roundness of external circle error detecting apparatus as claimed in claim 3, which is characterized in that guide frame further includes erecting The guide blot being directly arranged, guide blot lower thread are screwed in the screw hole of dovetail trench bottom, guide blot upper slidable Ground cooperation is in the strip pilot hole on movable gauge head.

6. valve retainer roundness of external circle error detecting apparatus as claimed in claim 3, which is characterized in that movable gauge head outer end face and It is also abutted between amesdial erecting bed and is provided with resetting spring.

7. valve retainer roundness of external circle error detecting apparatus as described in claim 1, which is characterized in that the fixed gauge head and gear The vertical core of strip is offered on block along face detection station direction, and is passed down through vertical core by bolt and is fixed on monitor station On.

8. a kind of valve retainer detection suit, which is characterized in that include the valve as described in any one of claim 1-7 claim Disk roundness of external circle error detecting apparatus further includes valve retainer end face circle jitter detection apparatus, the valve retainer Circular Run-out Tolerance inspection Device, including pedestal are surveyed, valve detent mechanism and valve side surface circle glitch detection mechanism are provided on pedestal；The valve is fixed Position mechanism is for realizing the horizontal location to valve to be detected and realizes to the valve after positioning in the axis away from valve retainer direction Upward unilateral limit, valve retainer end face circle glitch detection mechanism includes an amesdial mounting base, amesdial mounting base Upper installation is there are one horizontally disposed round glitch detection amesdial and justifies what glitch detection amesdial contact face was positioned Deviate the test point position setting in the center of circle on valve retainer end face, is provided in amesdial mounting base and is used for adjusting round glitch detection Amesdial is axially fixed the amesdial regulating mechanism of position.

9. valve retainer detection suit as claimed in claim 8, which is characterized in that the amesdial regulating mechanism, including one The montant being vertically provided in amesdial mounting base, montant middle part level offer amesdial mounting hole, the inspection of the amesdial Measuring staff is plugged on the mutually fixed part of dial plate in amesdial mounting hole, for setting in the detection bar of circle glitch detection amesdial The floating part for setting contact stretches out amesdial mounting hole, offers and cracks upwards in the montant above amesdial mounting hole, cracks The montants of both sides is provided with clamp bolt hole and corresponding fishbolt along extending vertically through direction of cracking, fishbolt for realizing The clamping of symmetry slot is to realize the fixation of amesdial.

10. valve retainer detection suit as claimed in claim 8, which is characterized in that the valve detent mechanism includes a gas Door positioning seat, the setting of valve positioning seat upper surface is there are one perforative locating slot along the longitudinal direction, and locating slot is for realizing to gas Door is along the positioning in positioning groove length direction, and there are one the vertical adjustable plate installation being located on front side of locating slot is flat for valve positioning seat tool Face is located at the right and left on front side of locating slot on adjustable plate mounting plane and is each provided with a positioning screw hole, on front side of locating slot The right and left is also each provided with a vertical adjustable plate, adjustable plate trailing flank and the fitting of adjustable plate mounting plane, two adjustings The opposite inside of plate is vertical confined planes, and corresponding to positioning screw hole on adjustable plate is provided with horizontal strip hole, is additionally provided with two A positioning bolt passes through corresponding strip hole and positioning screw hole to realize the fixation to adjustable plate.