CN110702053A - Device and method for rapidly measuring contact precision of thin-wall structural member and clamp - Google Patents
Device and method for rapidly measuring contact precision of thin-wall structural member and clamp Download PDFInfo
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- CN110702053A CN110702053A CN201911012180.4A CN201911012180A CN110702053A CN 110702053 A CN110702053 A CN 110702053A CN 201911012180 A CN201911012180 A CN 201911012180A CN 110702053 A CN110702053 A CN 110702053A
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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
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/16—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring distance of clearance between spaced objects
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Abstract
A device and method for measuring the contact accuracy of a thin-wall structural member and a clamp rapidly, wherein an upper clamp body and a lower clamp body of the device are concentrically and fixedly arranged; a sensor placing groove is formed in the upper surface of the lower clamp body, a plurality of non-contact displacement sensors are uniformly distributed in the sensor placing groove along the circumferential direction, and a measuring hole is formed in the upper clamp body right above each non-contact displacement sensor; the plurality of pressing plate components are uniformly distributed along the circumferential direction of the upper clamp body, and the pressing plate components and the measuring holes are alternately distributed. The method comprises the following steps: aligning and clamping the standard part on the upper clamp body, completing distance measurement between the non-contact displacement sensor and the standard part through the measuring hole, and taking distance data at the moment as reference data; and removing the standard part, aligning and clamping the thin-wall structural part on the upper fixture body, completing distance measurement between the non-contact displacement sensor and the thin-wall structural part through the measuring hole, comparing the distance data with the reference data, and judging to be qualified if the difference value between the distance data and the reference data is within the tolerance range, otherwise, judging to be unqualified.
Description
Technical Field
The invention belongs to the technical field of machining, and particularly relates to a device and a method for rapidly measuring the contact precision of a thin-wall structural member and a clamp.
Background
At present, the weight of an aviation structural component needs to be reduced as much as possible on the premise of ensuring the strength, so that the aviation structural component usually adopts a thin-wall structure, and along with the integrated development of the aviation structural component, an aviation structural component gradually presents the characteristics of large size, thin wall and complex structure, particularly the characteristics of large size and thin wall, so that the aviation structural component is easy to generate processing deformation after being processed. After the aviation structural part is deformed, whether the aviation structural part can meet the assembly requirement and the service performance requirement becomes an important factor for evaluating the machining quality of the aviation structural part.
Taking a casing structural member as an example, the casing structural member belongs to a typical thin-wall aviation structural member, and the casing structural member generally has a large size and is easily deformed after being processed. In order to ensure good matching between the manufacturing accuracy and the assembly accuracy of the casing structural member, the machined casing structural member is usually subjected to limit measurement on a three-coordinate measuring machine, and the limit measurement result has an important reference value for the assembly accuracy. When the casing structural member is limited and measured, the deformed casing structural member needs to be clamped again, and how to ensure that the deformed casing structural member has good contact precision with the main assembly surface of the fixture is also very important in the secondary clamping process.
In addition, the large thin-wall structural part is clamped on the clamp mainly by the pressing plate, and the thin-wall structural part can be reliably clamped by the pressing plates. However, if the clamping sequence, the pre-tightening force application and the like are not reasonable, the thin-wall structural member and the assembling surface of the clamp are in discontinuous contact, that is, although the thin-wall structural member at the pressure plate can keep good contact precision with the assembling surface of the clamp, the thin-wall structural member is easy to bulge and warp at other positions of the clamp, and therefore the contact precision of the thin-wall structural member and the clamp is unqualified at other positions.
At present, in order to judge whether the contact precision between a thin-wall structural part and a clamp is qualified, a feeler gauge is mainly adopted for qualitative measurement, and manual trial and error are specifically carried out in sequence through feeler gauges with different thicknesses. However, since the size of the thin-wall structural member is large and the contact accuracies at different positions affect each other, for this reason, the process of measurement-adjustment-remeasurement-readjustment of the contact accuracies at a plurality of positions is required, and the process is required to be repeated for a plurality of times, which results in low measurement efficiency.
Therefore, the existing contact precision qualitative measurement mode using the feeler gauge mode for the thin-wall structural member has difficulty to meet the actual requirement under the requirement of increasingly improved processing precision and manufacturing efficiency.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a device for rapidly measuring the contact precision of a thin-wall structural member and a clamp, which can realize quantitative measurement of the contact precision, can rapidly judge whether the contact precision between the thin-wall structural member and the clamp is qualified or not, and can effectively meet the requirements of increasingly improved processing precision and manufacturing efficiency.
In order to achieve the purpose, the invention adopts the following technical scheme: a device for rapidly measuring the contact precision of a thin-wall structural member and a clamp comprises a lower clamp body, an upper clamp body, a pressure plate assembly and a non-contact displacement sensor; the lower clamp body and the upper clamp body both adopt disc-shaped structures, and the upper clamp body is concentrically and fixedly arranged above the lower clamp body; a sensor placing groove is formed in the upper surface of the lower clamp body, a plurality of non-contact displacement sensors are uniformly distributed and installed in the sensor placing groove along the circumferential direction, and a measuring hole is formed in the upper clamp body right above each non-contact displacement sensor; the number of the pressing plate assemblies is a plurality, the pressing plate assemblies are uniformly distributed along the circumferential direction of the upper clamp body, and the pressing plate assemblies and the measuring holes are alternately distributed.
A method for rapidly measuring the contact precision of a thin-wall structural member and a clamp adopts the device for rapidly measuring the contact precision of the thin-wall structural member and the clamp, and comprises the following steps:
the method comprises the following steps: placing the standard part on the upper clamp body, aligning the standard part, and clamping and fixing the standard part on the upper clamp body through the pressure plate assembly;
step two: starting the non-contact displacement sensor, finishing the distance measurement between the non-contact displacement sensor and the standard component through the measuring hole, and taking the distance data at the moment as reference data;
step three: removing the standard component from the upper fixture body, then placing the thin-wall structural component on the upper fixture body, aligning the thin-wall structural component, and then clamping and fixing the thin-wall structural component on the upper fixture body through the pressing plate assembly;
step four: and starting the non-contact displacement sensor, finishing distance measurement between the non-contact displacement sensor and the thin-wall structural member through the measuring hole, comparing the distance data with the reference data obtained before, judging that the contact precision of the thin-wall structural member and the clamp is qualified when the difference value of the distance data and the reference data is within the tolerance range of the contact precision, and judging that the contact precision of the thin-wall structural member and the clamp is unqualified when the difference value of the distance data and the reference data is beyond the tolerance range of the contact precision.
The invention has the beneficial effects that:
the device for rapidly measuring the contact precision of the thin-wall structural member and the clamp can realize quantitative measurement of the contact precision, can rapidly judge whether the contact precision between the thin-wall structural member and the clamp is qualified or not, and can effectively meet the requirements of increasingly improved processing precision and manufacturing efficiency.
Drawings
FIG. 1 is a front view of an apparatus for rapidly measuring the contact accuracy between a thin-walled structural member and a fixture according to the present invention;
FIG. 2 is a top view of the apparatus for rapidly measuring the contact accuracy between a thin-walled structural member and a fixture according to the present invention;
in the figure, 1 is a lower clamp body, 2 is an upper clamp body, 3 is a pressure plate assembly, 4 is a non-contact displacement sensor, 5 is a sensor placing groove, 6 is a measuring hole, and 7 is a thin-wall structural member.
Detailed Description
The invention is described in further detail below with reference to the figures and the specific embodiments.
As shown in fig. 1 and 2, a device for rapidly measuring the contact precision between a thin-wall structural member and a clamp comprises a lower clamp body 1, an upper clamp body 2, a pressure plate assembly 3 and a non-contact displacement sensor 4; the lower clamp body 1 and the upper clamp body 2 both adopt disc-shaped structures, and the upper clamp body 2 is concentrically and fixedly arranged above the lower clamp body 1; a sensor placing groove 5 is formed in the upper surface of the lower clamp body 1, 4-8 non-contact displacement sensors 4 are uniformly arranged in the sensor placing groove 5 along the circumferential direction, and a measuring hole 6 is formed in the upper clamp body 2 right above each non-contact displacement sensor 4; the number of the pressing plate assemblies 3 is 4-8, the pressing plate assemblies 3 are uniformly distributed along the circumferential direction of the upper clamp body 2, and the pressing plate assemblies 3 and the measuring holes 6 are alternately distributed.
A method for rapidly measuring the contact precision of a thin-wall structural member and a clamp adopts the device for rapidly measuring the contact precision of the thin-wall structural member and the clamp, and comprises the following steps:
the method comprises the following steps: the standard part is placed on the upper clamp body 2, the standard part is aligned, and then the standard part is clamped and fixed on the upper clamp body 2 through the pressure plate assembly 3;
step two: starting the non-contact displacement sensor 4, finishing the distance measurement between the non-contact displacement sensor 4 and the standard component through the measuring hole 6, and taking the distance data at the moment as reference data;
step three: removing the standard component from the upper clamp body 2, then placing the thin-wall structural component 7 on the upper clamp body 2, aligning the thin-wall structural component 7, and then clamping and fixing the thin-wall structural component 7 on the upper clamp body 2 through the pressure plate assembly 3;
step four: starting the non-contact displacement sensor 4, finishing distance measurement between the non-contact displacement sensor 4 and the thin-wall structural member 7 through the measuring hole 6, comparing the distance data with the reference data obtained before, judging that the contact precision of the thin-wall structural member 7 and the clamp is qualified when the difference value of the distance data and the reference data is within the tolerance range of the contact precision, and judging that the contact precision of the thin-wall structural member 7 and the clamp is unqualified when the difference value of the distance data and the reference data is beyond the tolerance range of the contact precision.
The embodiments are not intended to limit the scope of the present invention, and all equivalent implementations or modifications without departing from the scope of the present invention are intended to be included in the scope of the present invention.
Claims (2)
1. The utility model provides a device of rapid survey thin wall structure spare and anchor clamps contact precision which characterized in that: comprises a lower clamp body, an upper clamp body, a pressure plate assembly and a non-contact displacement sensor; the lower clamp body and the upper clamp body both adopt disc-shaped structures, and the upper clamp body is concentrically and fixedly arranged above the lower clamp body; a sensor placing groove is formed in the upper surface of the lower clamp body, a plurality of non-contact displacement sensors are uniformly distributed and installed in the sensor placing groove along the circumferential direction, and a measuring hole is formed in the upper clamp body right above each non-contact displacement sensor; the number of the pressing plate assemblies is a plurality, the pressing plate assemblies are uniformly distributed along the circumferential direction of the upper clamp body, and the pressing plate assemblies and the measuring holes are alternately distributed.
2. A method for rapidly measuring the contact precision of a thin-wall structural member and a clamp, which adopts the device for rapidly measuring the contact precision of the thin-wall structural member and the clamp as claimed in claim 1, is characterized by comprising the following steps:
the method comprises the following steps: placing the standard part on the upper clamp body, aligning the standard part, and clamping and fixing the standard part on the upper clamp body through the pressure plate assembly;
step two: starting the non-contact displacement sensor, finishing the distance measurement between the non-contact displacement sensor and the standard component through the measuring hole, and taking the distance data at the moment as reference data;
step three: removing the standard component from the upper fixture body, then placing the thin-wall structural component on the upper fixture body, aligning the thin-wall structural component, and then clamping and fixing the thin-wall structural component on the upper fixture body through the pressing plate assembly;
step four: and starting the non-contact displacement sensor, finishing distance measurement between the non-contact displacement sensor and the thin-wall structural member through the measuring hole, comparing the distance data with the reference data obtained before, judging that the contact precision of the thin-wall structural member and the clamp is qualified when the difference value of the distance data and the reference data is within the tolerance range of the contact precision, and judging that the contact precision of the thin-wall structural member and the clamp is unqualified when the difference value of the distance data and the reference data is beyond the tolerance range of the contact precision.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911012180.4A CN110702053B (en) | 2019-10-23 | 2019-10-23 | Device and method for rapidly measuring contact precision of thin-wall structural member and clamp |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911012180.4A CN110702053B (en) | 2019-10-23 | 2019-10-23 | Device and method for rapidly measuring contact precision of thin-wall structural member and clamp |
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| CN110702053A true CN110702053A (en) | 2020-01-17 |
| CN110702053B CN110702053B (en) | 2021-11-05 |
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