CN112648910A - Eccentric aluminum piston vertical detection tool and detection method - Google Patents
Eccentric aluminum piston vertical detection tool and detection method Download PDFInfo
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- CN112648910A CN112648910A CN202110067922.4A CN202110067922A CN112648910A CN 112648910 A CN112648910 A CN 112648910A CN 202110067922 A CN202110067922 A CN 202110067922A CN 112648910 A CN112648910 A CN 112648910A
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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
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Abstract
An eccentric aluminum piston vertical gauge and a detection method thereof comprise a bottom plate, wherein a support plate is vertically arranged on the surface of the bottom plate, a first side surface and a second side surface are respectively arranged on two sides of the support plate, a V-shaped clamping assembly is vertically arranged on the first side surface of the support plate, a through hole is formed in the support plate, a cylindrical reference measuring rod penetrates through the through hole, the reference measuring rod is positioned above the V-shaped clamping assembly, and the inner diameter of the through hole is larger than the outer diameter of the reference measuring rod; s1, detecting the end A of the aluminum piston pin hole: s2, detecting the B end of the aluminum piston pin hole: s3, judgment XCDAnd XEFWhether they are equal; the invention can adjust the detection line to the short shaft through the floatable reference measuring bar, is convenient for judging the verticality, can determine whether the shapes of the two sides are symmetrical or not by comparing the measured values of the two sides, and if the two sides are symmetrical, the aluminum piston is in a regular ellipse shape, and the pin hole of the aluminum piston is vertical to the outer ring.
Description
Technical Field
The invention belongs to the technical field of aluminum piston machining, and particularly relates to an eccentric aluminum piston vertical gauge and a detection method thereof.
Background
When the aluminum piston with an oval structure is processed, the external dimension of the aluminum piston is easy to have errors, and when the shape of the outer ring of the aluminum piston is irregular, the outer ring of the aluminum piston is not perpendicular to the pin hole of the aluminum piston;
the verticality of an aluminum piston pin hole is an important parameter for measuring whether a piston pulls a cylinder under the working condition, and a verticality gauge for accurately measuring the eccentric pin hole with a concave surface of the piston is very important, at present, no better method for accurately detecting exists in the industry, the original verticality gauge has large detection identification, because the piston pin hole is eccentric, the minimum value of a short shaft perpendicular to the eccentric direction of the pin hole must be a measurement symmetric point, the original gauge is inaccurate in measurement or often causes misjudgment in the detection process, and in the detection of processes, a checker is often required to be mastered with certain experience, otherwise, a defective product is easily caused to flow into the hands of a user.
Disclosure of Invention
The invention provides an eccentric aluminum piston vertical gauge aiming at the defects in the prior art, and the specific technical scheme is as follows:
an eccentric aluminum piston vertical gauge comprises a bottom plate, wherein a support plate is vertically arranged on the surface of the bottom plate, a first side surface and a second side surface are respectively arranged on two sides of the support plate, a V-shaped clamping assembly is vertically arranged on the first side surface of the support plate, a through hole is formed in the support plate, a cylindrical reference measuring rod penetrates through the through hole, the reference measuring rod is positioned above the V-shaped clamping assembly, and the inner diameter of the through hole is larger than the outer diameter of the reference measuring rod;
a support assembly is vertically arranged on the second side face of the support plate, the upper surface of the support assembly is connected with a sliding block in a sliding mode, and one side, close to the first side face, of the sliding block is vertically and fixedly connected with a floatable reference measuring rod; the floatable reference measuring rod is used for compensating the offset of the aluminum piston pin hole, the outer diameter of the reference measuring rod is the same as the inner diameter of the aluminum piston pin hole, and the clamping assembly is used for stopping the aluminum piston subjected to limit offset compensation; dial indicators are arranged at the top of the sliding block at intervals, the dial indicators are vertically fixed on the support plate, and the detection ends of the dial indicators extend above the reference measuring rod in parallel;
the section of the aluminum piston is oval, the aluminum piston pin hole is eccentrically arranged, and the contact end point of the dial indicator and the outer ring of the aluminum piston is located on the short shaft.
Further, the two ends of the aluminum piston pin hole are respectively an end A and an end B, and the detection device has two detection states:
the first detection state: the end A of the aluminum piston pin hole is close to the dial indicator, and the measured value of the dial indicator after the offset compensation is finished is XCD；
The first detection state: the end B of the aluminum piston pin hole is close to the dial indicator, and the measured value of the dial indicator after the offset compensation is finished is XEF；
Further, said XCD、XEFThe application rule is as follows:
judgment of XCDAnd XEFWhether they are equal:
is, XCD＝XEFThe outer ring of the aluminum piston is in a regular shape, and the verticality between the axis of the hole of the aluminum piston pin and the outer ring of the aluminum piston reaches the standard;
NO, XCD≠XEFJudgment of XCDAnd XEFWhether the difference of (a) is within the qualified interval:
if the difference value of the two is within the qualified interval, the outer ring of the aluminum piston is in a qualified shape, and the verticality between the axis of the hole of the aluminum piston pin and the outer ring of the aluminum piston reaches the standard;
further, V type centre gripping subassembly includes first splint, second splint, first splint, second splint mirror symmetry set up and equal vertical fixation on the mounting plate, first splint, second splint all are right angled triangle.
Furthermore, the detection end of the dial indicator is provided with a detection rod capable of moving in a telescopic mode, the detection rod penetrates through the support plate in a sliding mode, and the detection rod is arranged on the surface of the reference measuring rod in parallel.
Furthermore, the supporting component comprises a linear sliding rail and a fixing frame, the linear sliding rail is fixed on the 7-shaped fixing frame which is arranged in a mirror symmetry mode, and the fixing frame is vertically arranged on the support plate.
Furthermore, the support plate and the bottom plate are both made of high-quality carbon and are subjected to thermal treatment, quenching and tempering and plane polishing treatment, and the V-shaped clamping component is made of high-quality carbon steel and is subjected to quenching and tempering treatment and then electroplating treatment.
A detection method of an eccentric aluminum piston vertical gauge comprises the following steps:
s1, detecting the end A of the aluminum piston pin hole:
aligning the end A of the aluminum piston pin hole with a reference measuring rod and inserting and installing the end A outside the reference measuring rod;
the aluminum piston main body is firstly contacted with the first clamping plate in the inserting process, meanwhile, the outer ring of the aluminum piston is contacted with the dial indicator point in the initial state, the contact point is a point C, and the point C is close to the second clamp
Arranging a plate;
continuing to insert the aluminum piston, the first clamping plate reversely pushes the aluminum piston and the reference measuring rod to synchronously translate, when the aluminum piston is abutted to the second clamping plate, the dial indicator is abutted to a point D of the aluminum piston, the point D is an end point of a short shaft of the aluminum piston, and at the moment, the compression amount of the dial indicator is XCD；
S2, detecting the B end of the aluminum piston pin hole:
the aluminum piston is turned over for 360 degrees, and the B end of the pin hole of the aluminum piston is aligned with the reference measuring rod and inserted into the reference measuring rod
An exterior;
the aluminum piston main body is firstly contacted with the first clamping plate in the inserting process, meanwhile, the outer ring of the aluminum piston is contacted with the dial indicator point in the initial state, the contact point is a point E, the point E is close to the second clamping plate, and the connecting line of the point E and the point D is parallel to the short shaft of the outer ring of the aluminum piston;
continuing to insert the aluminum piston, the first clamping plate reversely pushes the aluminum piston and the reference measuring rod to synchronously translate, when the aluminum piston is abutted to the second clamping plate, the dial indicator is abutted to a point F of the aluminum piston, the point F is the end point of the other end of the short shaft of the aluminum piston, and at the moment, the compression amount of the dial indicator is XEF；
S3, judgment XCDAnd XEFWhether they are equal:
is, XCD＝XEFThe outer ring of the aluminum piston is in a regular shape, and the verticality between the axis of the hole of the aluminum piston pin and the outer ring of the aluminum piston reaches the standard;
NO, XCD≠XEFJudgment of XCDAnd XEFWhether the difference of (a) is within the qualified interval:
if the difference value of the two is within the qualified interval, the outer ring of the aluminum piston is in a qualified shape, and the verticality between the axis of the hole of the aluminum piston pin and the outer ring of the aluminum piston reaches the standard;
NO, XCD≠XEFAnd if the difference value of the two is not in the qualified interval, the shape of the aluminum piston outer ring is irregular, the two sides of the aluminum piston outer ring are asymmetric, and the verticality between the axis of the aluminum piston pin hole and the aluminum piston outer ring does not reach the standard.
The invention has the beneficial effects that: the detection line can be adjusted to the short shaft through the floatable reference measuring rod, the verticality can be conveniently judged, whether the shapes of the two sides are symmetrical or not can be determined by comparing the measurement values of the two sides, if the two sides are symmetrical, the aluminum piston is in a regular oval shape, and the pin hole of the aluminum piston is perpendicular to the outer ring.
Drawings
FIG. 1 shows a schematic structural diagram of an eccentric aluminum piston vertical gauge of the present invention;
FIG. 2 shows a schematic view of a cross-sectional structure of the gauge of the present invention viewed from above;
FIG. 3 shows a rear view schematic diagram of the gauge of the present invention;
FIG. 4 is a schematic view showing an initial state of an A-end reference rod of an aluminum piston according to the present invention;
FIG. 5 is a schematic view showing the initial state of an A-end dial indicator of the aluminum piston of the invention;
FIG. 6 is a schematic view showing the detection state of the A-end reference rod of the aluminum piston according to the present invention;
FIG. 7 is a schematic diagram showing the detection state of an A-end dial indicator of the aluminum piston of the invention;
FIG. 8 is a schematic view showing an initial state of a B-end reference rod of an aluminum piston according to the present invention;
FIG. 9 is a schematic view showing the initial state of an aluminum piston end B dial indicator of the invention;
FIG. 10 is a schematic view showing the detection state of a B-end reference rod of an aluminum piston according to the present invention;
FIG. 11 is a schematic diagram showing the detection state of an aluminum piston end B dial indicator of the invention;
shown in the figure: 1. a base plate; 2. a mounting plate; 21. perforating; 3. a V-shaped clamping assembly; 31. a first splint; 32. a second splint; 4. a reference measuring bar; 41. a slider; 5. a dial indicator positioning block; 6. a dial indicator; 61. a detection lever; 7. a support assembly; 71. a linear slide rail; 72. a fixed mount; 8. an aluminum piston; 81. an aluminum piston pin bore.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, the eccentric aluminum piston vertical gauge comprises a bottom plate 1, wherein a support plate 2 is vertically arranged on the surface of the bottom plate 1, a first side surface and a second side surface are respectively arranged on two sides of the support plate 2, a V-shaped clamping assembly 3 is vertically arranged on the first side surface of the support plate 2, a through hole 21 is formed in the support plate 2, a cylindrical reference measuring rod 4 penetrates through the through hole 21, the reference measuring rod 4 is positioned above the V-shaped clamping assembly 3, and the inner diameter of the through hole 21 is larger than the outer diameter of the reference measuring rod 4; the inner diameter of the through hole is designed to be larger so as to ensure that the reference measuring rod can float left and right in the through hole;
a supporting component 7 is vertically arranged on the second side surface of the support plate 2, the upper surface of the supporting component 7 is connected with a sliding block 41 in a sliding manner, and one side, close to the first side surface, of the sliding block 41 is vertically and fixedly connected with a floatable reference measuring rod 4; the floatable reference measuring rod is used for compensating the offset of the aluminum piston pin hole, the outer diameter of the reference measuring rod is the same as the inner diameter of the aluminum piston pin hole, and the clamping assembly is used for stopping the aluminum piston subjected to limit offset compensation; dial indicators are arranged at the top of the sliding block at intervals, the dial indicators are vertically fixed on the support plate, and the detection ends of the dial indicators extend above the reference measuring rod in parallel;
the section of the aluminum piston 8 is oval, the aluminum piston pin hole 81 is eccentrically arranged, and the contact end point of the dial indicator 6 and the outer ring of the aluminum piston is located on the short shaft.
When the reference measuring rod floats, the sliding block can be driven to slide along the supporting component, and the supporting component and the sliding block can support and fix the reference measuring rod;
the floatable reference measuring rod is used for compensating the offset of the aluminum piston pin hole, the outer diameter of the reference measuring rod is the same as the inner diameter of the aluminum piston pin hole, the offset compensation can ensure that the dial indicator can measure the height difference of the outer ring to which the offset is applied, and then whether the two sides of the outer ring are symmetrical is judged, so that the perpendicularity of the outer ring of the piston and the axis of the pin hole is determined.
The two ends of the aluminum piston pin hole are respectively an A end and a B end, and the detection device has two detection states:
the first detection state: the end A of the aluminum piston pin hole is close to the dial indicator, and the measured value of the dial indicator after the offset compensation is finished is XCD；
The first detection state: the end B of the aluminum piston pin hole is close to the dial indicator, and the measured value of the dial indicator after the offset compensation is finished is XEF；
Said XCD、XEFThe application rule is as follows:
judgment of XCDAnd XEFWhether they are equal:
is, XCD＝XEFThe outer ring of the aluminum piston is in a regular shape, and the verticality between the axis of the hole of the aluminum piston pin and the outer ring of the aluminum piston reaches the standard;
NO, XCD≠XEFJudgment of XCDAnd XEFWhether the difference of (a) is within the qualified interval:
if the difference value of the two is within the qualified interval, the outer ring of the aluminum piston is in a qualified shape, and the verticality between the axis of the hole of the aluminum piston pin and the outer ring of the aluminum piston reaches the standard;
as shown in fig. 1 and 2, the V-shaped clamping assembly 3 includes a first clamping plate 31 and a second clamping plate 32, the first clamping plate 31 and the second clamping plate 32 are arranged in mirror symmetry and are both vertically fixed on the support plate 2, and the first clamping plate 31 and the second clamping plate 32 are both in the shape of a right triangle; first splint, second splint can support the conflict to the aluminium piston, are convenient for confirm the detection position.
A detection rod 61 capable of telescopic movement is arranged at the detection end of the dial indicator 6, the detection rod 61 penetrates through the support plate 2 in a sliding mode, and the detection rod 61 is arranged on the surface of the reference measuring rod 4 in parallel;
as shown in fig. 1 and 3, the support assembly 7 includes a linear slide rail 71 and a fixing frame 72, the linear slide rail 71 is fixed on the 7-shaped fixing frame 72 which is arranged in a mirror symmetry manner, and the fixing frame 72 is vertically arranged on the support plate 2; the sliding precision can be improved by utilizing the linear sliding rail.
The support plate and the bottom plate are both made of high-quality carbon materials through thermal treatment quenching and tempering and plane polishing treatment, and the V-shaped clamping component is made of high-quality carbon steel through quenching and tempering and then electroplating treatment.
A detection method of an eccentric aluminum piston vertical gauge comprises the following steps:
s1, detecting the end A of the aluminum piston pin hole:
as shown in fig. 4-5, the a end of the aluminum piston pin hole is aligned with the reference gauge rod and inserted and mounted outside thereof;
as shown in fig. 4-5, the aluminum piston body is firstly contacted with the first clamping plate in the process of inserting, and at the same time, the outer ring of the aluminum piston is contacted with the dial indicator point in the initial state, the contact point is a point C, and the point C is arranged close to the second clamping plate;
as shown in fig. 6-7, the aluminum piston is continuously inserted, the first clamping plate reversely pushes the aluminum piston and the reference measuring rod to synchronously translate, when the aluminum piston abuts against the second clamping plate, the dial indicator abuts against a point D of the aluminum piston, the point D is an end point of a short shaft of the aluminum piston, and at the moment, the compression amount of the dial indicator
Is XCD；
S2, detecting the B end of the aluminum piston pin hole:
as shown in fig. 8-9, the aluminum piston is flipped 360 deg. to align the B-ends of the aluminum piston pin bores
The reference measuring rod is inserted and installed outside the measuring rod;
as shown in fig. 8-9, the aluminum piston body is firstly contacted with the first clamping plate in the process of insertion, and at the same time, the outer ring of the aluminum piston is contacted with the dial indicator point in the initial state, the contact point is point E, the point E is arranged close to the second clamping plate, and the connecting line of the point E and the point D is parallel to the short axis of the outer ring of the aluminum piston;
as shown in fig. 10-11, the aluminum piston is continuously inserted, the first clamping plate reversely pushes the aluminum piston and the reference measuring rod to synchronously translate, when the aluminum piston abuts against the second clamping plate, the dial indicator abuts against a point F of the aluminum piston, the point F is the end point of the other end of the short shaft of the aluminum piston, and at the moment, the dial indicator is compressed
Amount is XEF；
S3, judgment XCDAnd XEFWhether they are equal:
is, XCD＝XEFThe outer ring of the aluminum piston is in a regular shape, and the verticality between the axis of the hole of the aluminum piston pin and the outer ring of the aluminum piston reaches the standard;
NO, XCD≠XEFJudgment of XCDAnd XEFWhether the difference of (a) is within the qualified interval:
if the difference value of the two is within the qualified interval, the outer ring of the aluminum piston is in a qualified shape, and the verticality between the axis of the hole of the aluminum piston pin and the outer ring of the aluminum piston reaches the standard;
NO, XCD≠XEFAnd if the difference value of the two is not in the qualified interval, the shape of the aluminum piston outer ring is irregular, the two sides of the aluminum piston outer ring are asymmetric, and the verticality between the axis of the aluminum piston pin hole and the aluminum piston outer ring does not reach the standard.
The detection line can be adjusted to the short shaft through the floatable reference measuring rod, the verticality can be conveniently judged, whether the shapes of the two sides are symmetrical or not can be determined by comparing the measurement values of the two sides, if the two sides are symmetrical, the aluminum piston is in a regular oval shape, and the pin hole of the aluminum piston is perpendicular to the outer ring.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. The utility model provides an eccentric formula aluminum piston examines utensil perpendicularly which characterized in that: the device comprises a bottom plate, wherein a support plate is vertically arranged on the surface of the bottom plate, a first side surface and a second side surface are respectively arranged on two sides of the support plate, a V-shaped clamping assembly is vertically arranged on the first side surface of the support plate, a through hole is formed in the support plate, a cylindrical reference measuring rod penetrates through the through hole and is positioned above the V-shaped clamping assembly, and the inner diameter of the through hole is larger than the outer diameter of the reference measuring rod;
a support assembly is vertically arranged on the second side face of the support plate, the upper surface of the support assembly is connected with a sliding block in a sliding mode, and one side, close to the first side face, of the sliding block is vertically and fixedly connected with a floatable reference measuring rod; the floatable reference measuring rod is used for compensating the offset of the aluminum piston pin hole, the outer diameter of the reference measuring rod is the same as the inner diameter of the aluminum piston pin hole, and the clamping assembly is used for stopping the aluminum piston subjected to limit offset compensation; dial indicators are arranged at the top of the sliding block at intervals, the dial indicators are vertically fixed on the support plate, and the detection ends of the dial indicators extend above the reference measuring rod in parallel;
the section of the aluminum piston is oval, the aluminum piston pin hole is eccentrically arranged, and the contact end point of the dial indicator and the outer ring of the aluminum piston is located on the short shaft.
2. The eccentric aluminum piston vertical gauge according to claim 1, characterized in that: the two ends of the aluminum piston pin hole are respectively an A end and a B end, and the detection device has two detection states:
the first detection state: the end A of the aluminum piston pin hole is close to the dial indicator, and the measured value of the dial indicator after the offset compensation is finished is XCD；
The first detection state: the end B of the aluminum piston pin hole is close to the dial indicator, and the measured value of the dial indicator after the offset compensation is finished is XEF；
3. The eccentric aluminum piston vertical gauge according to claim 2, characterized in that: said XCD、XEFThe application rule is as follows:
judgment of XCDAnd XEFWhether they are equal:
is, XCD＝XEFThe outer ring of the aluminum piston is in a regular shape, and the axis of the hole of the aluminum piston pin and the outside of the aluminum piston areThe verticality of the ring reaches the standard;
NO, XCD≠XEFJudgment of XCDAnd XEFWhether the difference of (a) is within the qualified interval:
if the difference value of the two is within the qualified interval, the outer ring of the aluminum piston is in a qualified shape, and the verticality between the axis of the hole of the aluminum piston pin and the outer ring of the aluminum piston reaches the standard;
4. the eccentric aluminum piston vertical gauge according to claim 1, characterized in that: the V-shaped clamping assembly comprises a first clamping plate and a second clamping plate, the first clamping plate and the second clamping plate are arranged in mirror symmetry and are perpendicularly fixed on the support plate, and the first clamping plate and the second clamping plate are both in a right-angled triangle shape.
5. The eccentric aluminum piston vertical gauge according to claim 1, characterized in that: the detection end of the dial indicator is provided with a detection rod capable of moving in a telescopic mode, the detection rod penetrates through the support plate in a sliding mode, and the detection rod is arranged on the surface of the reference measuring rod in parallel.
6. The eccentric aluminum piston vertical gauge according to claim 1, characterized in that: the supporting component comprises a linear sliding rail and a fixing frame, the linear sliding rail is fixed on a 7-shaped fixing frame which is arranged in a mirror symmetry mode, and the fixing frame is vertically arranged on the support plate.
7. The eccentric aluminum piston vertical gauge according to claim 1, characterized in that: the support plate and the bottom plate are both made of high-quality carbon materials through thermal treatment quenching and tempering and plane polishing treatment, and the V-shaped clamping component is made of high-quality carbon steel through quenching and tempering and then electroplating treatment.
8. A detection method of an eccentric aluminum piston vertical gauge is characterized in that: the eccentric aluminum piston vertical gauge applied to the claim 1, wherein the detection method comprises the following steps:
s1, detecting the end A of the aluminum piston pin hole:
aligning the end A of the aluminum piston pin hole with a reference measuring rod and inserting and installing the end A outside the reference measuring rod;
the aluminum piston main body is firstly contacted with the first clamping plate in the inserting process, meanwhile, the outer ring of the aluminum piston is contacted with the dial indicator point in the initial state, the contact point is a point C, and the point C is close to the second clamping plate;
continuing to insert the aluminum piston, the first clamping plate reversely pushes the aluminum piston and the reference measuring rod to synchronously translate, when the aluminum piston is abutted to the second clamping plate, the dial indicator is abutted to a point D of the aluminum piston, the point D is an end point of a short shaft of the aluminum piston, and at the moment, the compression amount of the dial indicator is XCD；
S2, detecting the B end of the aluminum piston pin hole:
turning the aluminum piston by 360 degrees, aligning the B end of the aluminum piston pin hole with the reference measuring rod and inserting and installing the B end outside the reference measuring rod;
the aluminum piston main body is firstly contacted with the first clamping plate in the inserting process, meanwhile, the outer ring of the aluminum piston is contacted with the dial indicator point in the initial state, the contact point is a point E, the point E is close to the second clamping plate, and the connecting line of the point E and the point D is parallel to the short shaft of the outer ring of the aluminum piston;
continuing to insert the aluminum piston, the first clamping plate reversely pushes the aluminum piston and the reference measuring rod to synchronously translate, when the aluminum piston is abutted to the second clamping plate, the dial indicator is abutted to a point F of the aluminum piston, the point F is the end point of the other end of the short shaft of the aluminum piston, and at the moment, the compression amount of the dial indicator is XEF；
S3, judgment XCDAnd XEFWhether they are equal:
is, XCD＝XEFThe outer ring of the aluminum piston is in a regular shape, and the verticality between the axis of the hole of the aluminum piston pin and the outer ring of the aluminum piston reaches the standard;
NO, XCD≠XEFJudgment of XCDAnd XEFWhether the difference of (a) is within the qualified interval:
if the difference value of the two is within the qualified interval, the outer ring of the aluminum piston is in a qualified shape, and the verticality between the axis of the hole of the aluminum piston pin and the outer ring of the aluminum piston reaches the standard;
NO, XCD≠XEFAnd is andif the difference value of the two is not in the qualified interval, the shape of the aluminum piston outer ring is irregular, the two sides of the aluminum piston outer ring are asymmetric, and the verticality between the axis of the aluminum piston pin hole and the aluminum piston outer ring does not reach the standard.
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| Title |
|---|
| 徐宗道: "活塞销孔轴线对裙部轴线垂直度检具", 《机械工人冷加工》 * |
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| Publication number | Publication date |
|---|---|
| CN112648910B (en) | 2022-11-08 |
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