CN117288072A - Cylinder cover coaxiality measuring device and method - Google Patents
Cylinder cover coaxiality measuring device and method Download PDFInfo
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- CN117288072A CN117288072A CN202311257578.0A CN202311257578A CN117288072A CN 117288072 A CN117288072 A CN 117288072A CN 202311257578 A CN202311257578 A CN 202311257578A CN 117288072 A CN117288072 A CN 117288072A
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- inspection
- seat hole
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- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000007689 inspection Methods 0.000 claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 210000004907 gland Anatomy 0.000 claims abstract description 8
- 230000000694 effects Effects 0.000 claims abstract description 4
- 238000005259 measurement Methods 0.000 claims description 21
- 230000006835 compression Effects 0.000 claims description 13
- 238000007906 compression Methods 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 6
- 239000010705 motor oil Substances 0.000 claims description 6
- 239000003921 oil Substances 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 6
- 238000000691 measurement method Methods 0.000 claims description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000003350 kerosene Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/24—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B5/25—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
- G01B5/252—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes for measuring eccentricity, i.e. lateral shift between two parallel axes
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The application provides a cylinder head axiality measuring device and measuring method, measuring device includes the inspection mandrel, inspection mandrel periphery slip cap is equipped with adjustable table frame, adjustable table frame periphery is provided with gland nut, gland nut spiral runs through adjustable table frame lateral wall and with the activity of inspection mandrel is contradicted, inspection mandrel is kept away from the end of adjustable table frame one end and is provided with the gauge outfit, adjustable table frame is provided with the lever amesdial for one side end of inspection mandrel, the lever amesdial extends towards the gauge outfit and sets up. The measuring device and the measuring method can rapidly finish the inspection of the coaxiality error of the center line of the air inlet valve seat hole and the air outlet valve seat hole of the air cylinder cover relative to the center line of the water jacket pipe hole on a working site, thereby being beneficial to further improving and improving the processing quality of the air cylinder cover.
Description
Technical Field
The application relates to the technical field of cylinder cover machining, in particular to a cylinder cover coaxiality measuring device and method.
Background
The statements in this section merely provide background information related to the present application and may not necessarily constitute prior art.
The cylinder cover body is one of the most critical parts of the diesel engine, the center line of the air inlet valve seat hole and the air outlet valve seat hole of the cylinder cover has strict coaxiality error requirements relative to the center line of the water jacket pipe hole, and the coaxiality error cannot be measured by a conventional method. Meanwhile, the coaxiality error of the cylinder cover also determines the tightness of the cylinder cover by grinding the conical surface of the air valve and the conical surface of the valve disc of the valve seat after the water seal sleeve, the air valve guide pipe, the air valve and the valve seat are arranged on the cylinder cover, and the tightness has extremely critical and extremely important influence on the test performance of the diesel engine, so that in the assembly process of the cylinder cover assembly parts, professional inspectors need to utilize pure kerosene medium to test the grinding and tightness of the conical surface of the air valve and the conical surface of the valve disc of the valve seat, and when the pure kerosene medium does not miss in 10 minutes, the qualified transition can be realized.
At present, the coaxiality error of the center line of the air inlet valve seat hole and the center line of the air outlet valve seat hole of the air cylinder cover relative to the center line of the water jacket pipe hole is detected by adopting a point taking method, and the defect that the three-coordinate measuring head is short and can only take a point at the most edge of the water jacket pipe hole, and the most edge of the water jacket pipe hole only accounts for about one sixth of the whole water jacket pipe hole, namely the valve guide pipe hole, so that the whole inner hole of the water jacket pipe hole cannot be contained, and the measuring precision and the production efficiency are low.
Disclosure of Invention
In order to solve the problems, the application provides a cylinder cover coaxiality measuring device and a cylinder cover coaxiality measuring method, which can rapidly finish the inspection of coaxiality errors of the center line of a cylinder cover air inlet valve seat hole and an air outlet valve seat hole relative to the center line of a water jacket pipe hole on a working site, thereby being beneficial to further improving and improving the processing quality of the cylinder cover.
The application provides cylinder head axiality measuring device, include: the inspection mandrel, inspection mandrel periphery slip cap is equipped with adjustable table frame, adjustable table frame periphery is provided with gland nut, gland nut spiral runs through adjustable table frame lateral wall and with inspection mandrel activity conflict, the end that inspection mandrel kept away from adjustable table frame one end is provided with the gauge outfit, and adjustable table frame is provided with the lever amesdial for one side end of inspection mandrel, the lever amesdial extends towards the gauge outfit and sets up.
Preferably, the head of the measuring gauge head has a circular structure.
Preferably, the accuracy of the indication value of the lever dial indicator is more than or equal to 0.002mm.
Preferably, the inspection mandrel comprises a measurement mandrel and a sliding rail shaft, the measurement mandrel is connected with the measurement gauge head and is of a cylindrical structure, a pressing plane is formed in one side of the periphery of the sliding rail shaft, and the adjustable gauge stand slides along the sliding rail shaft and the compression nut is movably abutted to the pressing plane.
The application also provides a cylinder cover coaxiality measuring method, which comprises the following steps:
s1: placing the cylinder cover on the inspection platform, placing an air inlet valve seat hole and an air outlet valve seat hole of the cylinder cover upwards, placing an inspection mandrel of the measuring device into a water seal sleeve, enabling the head of the meter measuring head to be in point contact with the upper plane of the inspection platform, and completing axial positioning of the mandrel;
s2: loosening the compression nut, adjusting the adjustable gauge stand to enable the gauge head of the lever dial gauge to be arranged in the middle position of the inlet valve seat hole and the exhaust valve seat hole, enabling the gauge needle of the lever dial gauge to be in a zero position at the initial position, rotating the lever dial gauge by 360 degrees for one circle, reading once every 45 degrees of rotation of the lever dial gauge during the rotation process, taking the absolute value of the maximum value of 8 times of reading as a measured value A, and measuring the average value a of the measured value A taken three times;
s3: loosening the compression nut, adjusting the adjustable gauge stand to enable the gauge head of the lever dial gauge to be arranged at the bottom positions of the inlet valve seat hole and the exhaust valve seat hole, obtaining a measured value B according to the measuring method in the step S2, and measuring the average value B of the measured value B obtained three times;
s4: loosening the compression nut, adjusting the adjustable gauge stand to enable the gauge head of the lever dial gauge to be arranged at the top positions of the inlet valve seat hole and the exhaust valve seat hole, obtaining a measured value C according to the measuring method in the step S2, and measuring the average value C of the measured value C obtained three times;
s5: and calculating (a+b+c)/3, namely obtaining the coaxiality error value of the central line of the valve seat hole of the cylinder cover relative to the central line of the water jacket hole.
Preferably, before the step S1, burrs are removed from the air intake and exhaust valve seat hole and the water jacket pipe hole of the cylinder head to be tested, the air intake and exhaust valve seat hole and the water jacket pipe hole of the cylinder head to be tested and a checking mandrel of the cylinder head coaxiality measuring device are cleaned by using absolute ethyl alcohol; the cylinder cover air inlet and outlet valve seat hole and the water jacket hole are coated with engine oil, and the periphery of the measuring mandrel of the checking mandrel is also coated with engine oil.
Preferably, in the step S1, after the inspection spindle of the measuring device is placed in the water jacket hole, the measuring device is rotated clockwise or anticlockwise for several turns, so that the measuring spindle is uniformly stressed in the valve guide hole and is fully contained under the action of an oil film.
Preferably, in steps S2 to S4, after the lever dial indicator rotates 360 ° once, the pointer of the lever dial indicator needs to return to the zero position.
Preferably, in said steps S2 to S4, the addition of the values of the 8 readings during the measurement needs to be equal to 0.
Compared with the prior art, the beneficial effects of this application are:
(1) The measuring device is designed and manufactured mainly by adopting a principle method of a comprehensive gauge, is a measuring device with a typical T-shaped structure, has a simple structure, is convenient and quick in a comprehensive measurement measuring method and high in function expansibility, and can quickly detect coaxiality errors of the central line of the valve seat hole of the cylinder cover relative to the central line of the water jacket hole on a working site by following and applying a sealing principle of one of four measuring principles in a measuring process.
(2) The whole structure of the measuring method adopts a detection method of analog measurement, the measuring mandrel of the measuring mandrel and the inner wall of the water jacket tube hole are uniformly stressed, the head of the circular structure of the measuring gauge head is in point contact with the measuring platform, the measuring mandrel is convenient to accurately and axially position in the measuring process, and the measuring mandrel is fully contained under the action of an oil film and fully contained under the action of the oil film, so that the central axis of the whole water jacket tube hole can be accurately simulated.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application.
Figure 1 is a schematic view of a measuring device according to an embodiment of the present application,
figure 2 is a flow chart of a method of one embodiment of the present application,
fig. 3 is a schematic illustration of an implementation of the present application.
In the figure:
1. the measuring instrument comprises a measuring instrument head 2, a checking mandrel 3, a lever dial indicator 4, a compression nut 5, an adjustable instrument holder 21, a measuring mandrel 22 and a sliding rail shaft.
The specific embodiment is as follows:
the present application is further described below with reference to the drawings and examples.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments in accordance with the present disclosure. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
In the present disclosure, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, are merely relational terms determined for convenience in describing structural relationships of the various components or elements of the present disclosure, and do not denote any one of the components or elements of the present disclosure, and are not to be construed as limiting the present disclosure.
Example 1
As shown in fig. 1, the present application provides a cylinder head coaxiality measuring apparatus including: the inspection mandrel 2, inspection mandrel 2 periphery slip cap is equipped with adjustable table frame 5, adjustable table frame 5 periphery is provided with gland nut 4, gland nut 4 spiral runs through adjustable table frame 5 lateral wall and with inspection mandrel 2 activity conflict, the end that inspection mandrel 2 kept away from adjustable table frame 5 one end is provided with gauge outfit 1, and adjustable table frame 5 is provided with lever dial indicator 3 for the one side end of inspection mandrel 2, lever dial indicator 3 extends towards gauge outfit 1 and sets up.
The measuring device is designed and manufactured mainly by adopting a principle method of a comprehensive gauge, is a measuring device with a typical T-shaped structure, has a simple structure, and the measuring method of the comprehensive measurement is convenient and quick, has strong function expansibility, and simultaneously, the measuring process also follows and applies a sealing principle of one of four measuring principles, so that the detection of the coaxiality error of the central line of the valve seat hole of the cylinder cover relative to the central line of the water jacket hole can be rapidly completed on a working site, the measuring precision is high, the detecting speed is high, a blank in the aspect of the measuring technology is filled, and the detection method of the coaxiality error is also richer.
Specifically, the inspection mandrel 2 includes a measurement mandrel 21 and a slide rail shaft 22, the measurement mandrel 21 is connected with the measurement gauge outfit 1 and is in a cylindrical structure, a pressing plane is provided on one side of the periphery of the slide rail shaft 22, and the adjustable gauge stand 5 slides along the slide rail shaft 22 and the compression nut 4 movably abuts against the pressing plane.
Preferably, the head of the measuring gauge outfit 1 is of a circular structure, and the contact form of the head and the testing platform is point contact, and the point contact facilitates the accurate axial positioning of the testing spindle 2 in the measuring process, so that the measuring spindle 21 of the testing spindle 2 is uniformly stressed in the water jacket tube hole and fully contained under the action of an oil film.
Preferably, the accuracy of the indication value of the lever dial indicator 3 is more than or equal to 0.002mm.
As shown in fig. 2 and 3, the present application further provides a cylinder head coaxiality measurement method based on the measurement device, which specifically includes the following steps:
s1: placing the cylinder cover on the inspection platform, placing an air inlet valve seat hole and an air outlet valve seat hole of the cylinder cover upwards, placing an inspection mandrel 2 of the measuring device into a water seal sleeve, enabling the head of the meter measuring head to be in point contact with the upper plane of the inspection platform, and completing axial positioning of the mandrel;
s2: loosening the compression nut 4, adjusting the adjustable gauge stand 5 to enable the gauge head of the lever dial gauge 3 to be arranged at the middle position of the air inlet valve seat hole and the air outlet valve seat hole, enabling the gauge needle of the lever dial gauge 3 to be in a zero position at the initial position, rotating the lever dial gauge 3 for 360 degrees for one circle, reading once every 45 degrees of rotation of the lever dial gauge 3 in the rotating process, taking the absolute value of the maximum value of 8 times of reading as a measured value A, and measuring the average value a of the measured value A taken three times;
s3: loosening the compression nut 4, adjusting the adjustable gauge stand 5 to enable the gauge head of the lever dial gauge 3 to be arranged at the bottom positions of the inlet valve seat hole and the exhaust valve seat hole, acquiring a measured value B according to the measuring method in the step S2, and measuring the average value B of the measured value B obtained three times;
s4: loosening the compression nut 4, adjusting the adjustable gauge stand 5 to enable the gauge head of the lever dial gauge 3 to be arranged at the top positions of the inlet valve seat hole and the exhaust valve seat hole, acquiring a measured value C according to the measuring method in the step S2, and measuring the average value C of the measured value C obtained three times;
s5: and calculating (a+b+c)/3, namely obtaining the coaxiality error value of the central line of the valve seat hole of the cylinder cover relative to the central line of the water jacket hole.
Specifically, in the step S1, the water jacket tube is disposed in the intake and exhaust valve seat hole, and the water jacket tube hole is an inner hole of the jacket tube hole, which may be named as a valve guide tube hole according to the function.
Specifically, before the step S1, burrs are removed from the air intake and exhaust valve seat hole and the water jacket pipe hole of the cylinder head to be tested, the cylinder head is blown clean by strong wind, and then the air intake and exhaust valve seat hole and the water jacket pipe hole of the cylinder head to be tested and the inspection mandrel 2 of the cylinder head coaxiality measuring device are wiped clean by absolute ethyl alcohol. The cylinder head intake and exhaust valve seat hole and the water jacket hole are coated with engine oil, and the periphery of the measuring spindle 21 of the inspection spindle 2 is also coated with engine oil.
Specifically, in the step S1, after the inspection spindle 2 of the measuring device is placed in the water jacket hole, the measuring device is rotated clockwise or counterclockwise for several turns, so that the measuring spindle 21 is uniformly stressed in the water jacket hole and is fully contained under the action of an oil film.
Specifically, in the steps S2 to S4, after the lever dial indicator 3 rotates 360 ° for 360 °, the pointer of the lever dial indicator 3 needs to return to the zero position, in the steps S2 to S4, the sum of the values of 8 readings in the measurement process needs to be equal to 0, and the sealing principle is one of four measurement principles, that is, if the sealing condition can be satisfied in the measurement, the sum of the interval errors must be zero.
The closed principle is the most basic principle of angle metering, and not only can the total accumulated error be zero, but also self-checking conditions are created, namely, the self-checking can be realized without any standard appliance.
The cylinder cover coaxiality measuring device and the measuring method can be used for measuring other similar double-hole coaxiality errors, can also be used for measuring valve seat hole circle runout errors, and are high in function expansibility.
The foregoing is merely a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and variations may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.
While the foregoing description of the embodiments of the present application has been presented in conjunction with the drawings, it should be understood that it is not intended to limit the scope of the application, but rather, it is intended to cover all modifications or variations which may be resorted to without undue burden to those skilled in the art, having the benefit of the present application.
Claims (9)
1. Cylinder head axiality measuring device, its characterized in that includes: inspection mandrel (2), inspection mandrel (2) periphery slip cap is equipped with adjustable table frame (5), adjustable table frame (5) periphery is provided with gland nut (4), gland nut (4) spiral runs through adjustable table frame (5) lateral wall and contradicts with inspection mandrel (2) activity, the end that adjustable table frame (5) one end was kept away from to inspection mandrel (2) is provided with gauge outfit (1), and adjustable table frame (5) are provided with lever indicator (3) for one side end of inspection mandrel (2), lever indicator (3) extend towards gauge outfit (1) and set up.
2. The cylinder head coaxiality measurement device according to claim 1, wherein:
the head of the measuring gauge head (1) is of a circular structure.
3. The cylinder head coaxiality measurement device according to claim 1, wherein:
the indicating value precision of the lever dial indicator (3) is more than or equal to 0.002mm.
4. The cylinder head coaxiality measurement device according to claim 2, characterized in that:
the inspection mandrel (2) comprises a measurement mandrel (21) and a sliding rail shaft (22), the measurement mandrel (21) is connected with the measurement gauge outfit (1) and is of a cylindrical structure, a pressing plane is formed on one side of the periphery of the sliding rail shaft (22), and the adjustable gauge stand (5) slides along the sliding rail shaft (22) and the compression nut (4) is movably abutted to the pressing plane.
5. The cylinder head coaxiality measuring method according to claim 4, comprising the steps of:
s1: placing the cylinder cover on an inspection platform, placing an air inlet valve seat hole and an air outlet valve seat hole of the cylinder cover upwards, placing an inspection mandrel (2) of a measuring device into a water seal sleeve, enabling the head of a meter measuring head to be in point contact with the upper plane of the inspection platform, and completing axial positioning of the mandrel;
s2: loosening a compression nut (4), adjusting an adjustable meter frame (5), enabling the meter head of a lever dial indicator (3) to be arranged at the middle position of an air inlet valve seat hole and an air outlet valve seat hole, enabling a meter needle of the lever dial indicator (3) to be in a zero position at the initial position, enabling the lever dial indicator (3) to rotate for 360 degrees for one circle, reading once every 45 degrees of rotation of the lever dial indicator (3) in the rotating process, taking the absolute value of the maximum value of 8 times of reading as a measured value A, and measuring the average value a of the measured value A obtained three times;
s3: loosening a compression nut (4), adjusting an adjustable meter frame (5) to enable the meter head of a lever dial indicator (3) to be arranged at the bottom positions of an inlet valve seat hole and an exhaust valve seat hole, acquiring a measured value B according to the measuring method in the step S2, and measuring the average value B of the measured value B obtained three times;
s4: loosening a compression nut (4), adjusting an adjustable meter frame (5) to enable the meter head of a lever dial indicator (3) to be arranged at the top positions of an inlet valve seat hole and an exhaust valve seat hole, acquiring a measured value C according to the measuring method in the step S2, and measuring the average value C of the measured value C obtained three times;
s5: and calculating (a+b+c)/3, namely obtaining the coaxiality error value of the central line of the valve seat hole of the cylinder cover relative to the central line of the water jacket hole.
6. The cylinder head coaxiality measurement method according to claim 5, wherein:
before the step S1, deburring the air inlet and outlet valve seat hole and the water jacket pipe hole of the tested cylinder cover, blowing the air with strong wind, and wiping the air inlet and outlet valve seat hole and the water jacket pipe hole of the tested cylinder cover and a checking mandrel (2) of the cylinder cover coaxiality measuring device with absolute ethyl alcohol;
the cylinder cover air inlet and outlet valve seat hole and the water jacket hole are coated with engine oil, and the periphery of a measuring mandrel (21) of the checking mandrel (2) is also coated with engine oil.
7. The cylinder head coaxiality measurement method according to claim 6, wherein:
in the step S1, after the inspection mandrel (2) of the measuring device is placed in the water jacket pipe hole, the measuring device is rotated clockwise or anticlockwise for a plurality of circles, so that the stress of the measuring mandrel (21) in the water jacket pipe hole is uniform, and the measuring mandrel is fully contained under the action of an oil film.
8. The cylinder head coaxiality measurement method according to claim 5, wherein:
in the steps S2 to S4, after the lever dial indicator (3) rotates for 360 degrees, the pointer of the lever dial indicator (3) needs to return to the zero position again.
9. The cylinder head coaxiality measurement method according to claim 8, wherein:
in said steps S2 to S4, the addition of the values of the 8 readings during the measurement needs to be equal to 0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311257578.0A CN117288072A (en) | 2023-09-27 | 2023-09-27 | Cylinder cover coaxiality measuring device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311257578.0A CN117288072A (en) | 2023-09-27 | 2023-09-27 | Cylinder cover coaxiality measuring device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117288072A true CN117288072A (en) | 2023-12-26 |
Family
ID=89240422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311257578.0A Pending CN117288072A (en) | 2023-09-27 | 2023-09-27 | Cylinder cover coaxiality measuring device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117288072A (en) |
-
2023
- 2023-09-27 CN CN202311257578.0A patent/CN117288072A/en active Pending
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