CN104792463A - Eccentric revolve-body calibration method - Google Patents

Abstract

The invention relates to an eccentric revolve-body calibration method. The method includes: placing two standard bodies together and observing whether errors are within the allowance range or not through measurement of eccentricity of the combined body and comparison of theoretical values; in the first state, measuring centroid of the standard bodies for one time, then measuring the centroid for the second time after adjusting the standard bodies into the second state, and listing two equations under the two states; measuring out the value of L1 through above steps and keeping the same as a test equipment parameter. A set of L0 test system is designed for convenience in operation, and measurement is achieved by taking a warhead as a benchmark standard centroid Xc through coordinate transformation. With the method, calibration can be effectively performed on the eccentricity of the revolve body, calibration effect can be improved, errors are reduced, the calibration method is convenient to test, and influence by the test method is reduced.

Description

The eccentric scaling method of a kind of solid of revolution

Technical field

The present invention relates to the eccentric labelling technique field of solid of revolution, be specifically related to the eccentric scaling method of a kind of solid of revolution.

Background technology

The basis of forefathers' research have studied the inclined various measuring method of matter and precision analysis, the fundamental purpose of research passes through Integrated comparative, show which kind of method often kind of testee should select to obtain best test result, thus improve the precision minimizing hardware cost measured, improve testing efficiency and measuring accuracy, be easy to adjustment, save time, avoid measuring accuracy relevant with operator's skill, reduce testing cost.

Summary of the invention

The object of the present invention is to provide the eccentric scaling method of a kind of solid of revolution, to demarcate for solid of revolution bias better, improve and demarcate effect, reduce error.

To achieve these goals, technical solution of the present invention is as follows:

Two standard bodies are placed together by the eccentric scaling method of a kind of solid of revolution, and by comparing with theoretical value the measurement of assembly bias, whether malobservation is in allowed band.The computing formula of theoretical eccentric throw is:

$E=\frac{M_1({\mathrm{\Φ}}_1+{\mathrm{\Φ}}_2)}{2(M_1+M_2)}---\left(1\right)$

Wherein: E is the eccentric throw of quality center of mass sample post and matter inclined sample column combination body; M ₁for the quality of the inclined sample post of matter; Φ ₁for the diameter of the inclined sample post of matter; M ₂for the quality of quality center of mass sample post; Φ ₂for the diameter of quality sample post.

Measure the barycenter of a standard body in state one, then standard body adjusted and measure a barycenter again as state two, two equations can be listed under above two states:

$X_{C1}=\frac{(P_{12}-P_{02})\×L}{P}+L_1-L_{01}---\left(1\right)$

$X_{C2}=\frac{(P_{22}-P_{02})\×L}{P}+L_1-L_{02}---\left(2\right)$

Wherein: X _c1for the state barycenter that a period of time, standard body was benchmark with B end face; X _c2for the barycenter that standard body during state two is benchmark with A end face; P ₁₂for state sensor P for the moment ₂stressed size; P ₂₂for sensor P during state two ₂stressed size; L ₀₁the standard body B end face recorded for the moment for state is to the distance of benchmark link stopper; L ₀₂for the standard body A end face that records during state two is to the distance of benchmark link stopper.

The length of the standard body of profile rule can measure, and is set to L, and its quality W is also known, that is:

$L=X_{C1}+X_{C2}=\frac{(P_{12}-P_{02})\×L+(P_{22}-P_{02})\×L}{W}+2L_1-L_{01}-L_{02}---\left(3\right)$

Solve:

$L_1=\frac{X_{C1}+X_{C2}+L_{01}+L_{02}-\frac{(P_{12}-P_{02})\×L+(P_{22}-P_{02})\×L}{W}}{2}---\left(4\right)$

L can be measured by above-mentioned steps ₁value, preserved as testing apparatus parameter.

In test procedure, transmission be produce P ₁, P ₂the mass of object of gravity, so no longer there is gravity acceleration g in computing formula, all considers by this point later if no special instructions.

In actual measurement, the position that standard body is placed on measurement bay can not be changeless, so the L in formula ₁-L ₀value needs to measure.For the ease of operation, devise a set of L ₀measuring system, finally realizes with bullet being base standard physique heart X by coordinate conversion _cmeasuring method.

When reality is tested, L, L ₁be definite value, only need measure P ₁, P ₂, L ₀.Instrument is after demarcating, in order to ensure its precision, need test to it with standard body, its function class is similar to counterweight, namely be put into tester with the object that known quality, barycenter, matter are inclined to get on measurement, the value measured is compared with theoretical value, misses by both the precision that extent judges instrument.For quality, barycenter we to be directly positioned on measurement bay with a standard body and to check.

The calibration of system and inspection according to being standard body, standard body is made up of the exemplar of a series of profile rule, and the quality of each standard body, physical dimension and morpheme size need accurate measurement, and pass through measurement verification.Standard body is after combination, and centroid position and the inertia size of assembly all obtain by theory calculate.After demarcation according to calibration code finishing equipment, standard body and assembly thereof are detected, detected state at least two kinds, standard body can be common to moment of inertia testing apparatus (polar moment of inertia, equator moment of inertia), barycenter eccentric testing equipment (barycenter, bias), it is test product weight (1 ± 20%) times that the weight of standard body meets, it is 1/5 ~ 5 times of measured piece inertia that the inertia of standard body meets, and after the assay was approved, tests product.

During barycenter eccentric testing, the setting of partial parameters has a great impact measurement result.Wherein, measuring accuracy depends primarily on the demarcation of L and Le.That L represents is testing apparatus P ₁, P ₂distance between sensor, what Le represented is the distance of accentric support seat to the inclined gauge head of matter.The part be connected with pedestal due to measurement bay supports by gauge head, and can contact and the value of L, Le can not be changed by guarantee point like this, so will record the value of two parameters, only the centre distance need measured between gauge head can realize the test of L, Le value.

Concrete demarcating steps is as follows:

(4) measurement bay bottom surface is rushed to placement, all gauge heads all rush to;

(5) with one finished flat board abut against on quality center of mass gauge head 2,3;

(6) arrange according to axis direction with slip gauge;

(4) measure the distance between quality center of mass gauge head 1 to last slip gauge with pit gauge, be designated as d;

(5) add that d value deducts the diameter of quality center of mass gauge head again by the length measured by slip gauge, just equal the length (add and will guarantee that the diameter of three quality center of mass gauge heads is identical man-hour) of L;

(6) measuring method of Le is identical with the measuring method of L;

(7) value of L, Le can be preserved in loading routine after measuring, and calculates for barycenter eccentric testing.

It is noted that the surveying work of L, Le value can complete before going out school, direct working procedure in practice.In addition it should be noted that installed two mobilizable V-type framves on measurement bay, be conveniently arrange to load different standard bodies.Value due to L determines by installing fixing gauge head below measurement bay, and can not there be impact the position changing V-type frame on gauge head below, therefore also can not have impact to the value of L.

This beneficial effect of the invention is: this inventive method can be demarcated for solid of revolution bias effectively, improves and demarcates effect, reduces error, and scaling method is convenient to detect, and decreases the impact that method of testing causes.

Embodiment

Below in conjunction with embodiment, the specific embodiment of the present invention is described, better to understand the present invention.

Embodiment

Two standard bodies are placed together by the eccentric scaling method of solid of revolution in the present embodiment, and by comparing with theoretical value the measurement of assembly bias, whether malobservation is in allowed band.The computing formula of theoretical eccentric throw is:

$E=\frac{M_1({\mathrm{\Φ}}_1+{\mathrm{\Φ}}_2)}{2(M_1+M_2)}---\left(1\right)$

Wherein: E is the eccentric throw of quality center of mass sample post and matter inclined sample column combination body; M ₁for the quality of the inclined sample post of matter; Φ ₁for the diameter of the inclined sample post of matter; M ₂for the quality of quality center of mass sample post; Φ ₂for the diameter of quality sample post.

Measure the barycenter of a standard body in state one, then standard body adjusted and measure a barycenter again as state two, two equations can be listed under above two states:

$X_{C1}=\frac{(P_{12}-P_{02})\×L}{P}+L_1-L_{01}---\left(1\right)$

$X_{C2}=\frac{(P_{22}-P_{02})\×L}{P}+L_1-L_{02}---\left(2\right)$

Wherein: X _c1for the state barycenter that a period of time, standard body was benchmark with B end face; X _c2for the barycenter that standard body during state two is benchmark with A end face; P ₁₂for state sensor P for the moment ₂stressed size; P ₂₂for sensor P during state two ₂stressed size; L ₀₁the standard body B end face recorded for the moment for state is to the distance of benchmark link stopper; L ₀₂for the standard body A end face that records during state two is to the distance of benchmark link stopper.

The length of the standard body of profile rule can measure, and is set to L, and its quality W is also known, that is:

$L=X_{C1}+X_{C2}=\frac{(P_{12}-P_{02})\×L+(P_{22}-P_{02})\×L}{W}+2L_1-L_{01}-L_{02}---\left(3\right)$

Solve:

$L_1=\frac{X_{C1}+X_{C2}+L_{01}+L_{02}-\frac{(P_{12}-P_{02})\×L+(P_{22}-P_{02})\×L}{W}}{2}---\left(4\right)$

L can be measured by above-mentioned steps ₁value, preserved as testing apparatus parameter.

In test procedure, transmission be produce P ₁, P ₂the mass of object of gravity, so no longer there is gravity acceleration g in computing formula, all considers by this point later if no special instructions.

In actual measurement, the position that standard body is placed on measurement bay can not be changeless, so the L in formula ₁-L ₀value needs to measure.For the ease of operation, devise a set of L ₀measuring system, finally realizes with bullet being base standard physique heart X by coordinate conversion _cmeasuring method.

When reality is tested, L, L ₁be definite value, only need measure P ₁, P ₂, L ₀.Instrument is after demarcating, in order to ensure its precision, need test to it with standard body, its function class is similar to counterweight, namely be put into tester with the object that known quality, barycenter, matter are inclined to get on measurement, the value measured is compared with theoretical value, misses by both the precision that extent judges instrument.For quality, barycenter we to be directly positioned on measurement bay with a standard body and to check.

The calibration of system and inspection according to being standard body, standard body is made up of the exemplar of a series of profile rule, and the quality of each standard body, physical dimension and morpheme size need accurate measurement, and pass through measurement verification.Standard body is after combination, and centroid position and the inertia size of assembly all obtain by theory calculate.After demarcation according to calibration code finishing equipment, standard body and assembly thereof are detected, detected state at least two kinds, standard body can be common to moment of inertia testing apparatus (polar moment of inertia, equator moment of inertia), barycenter eccentric testing equipment (barycenter, bias), it is test product weight (1 ± 20%) times that the weight of standard body meets, it is 1/5 ~ 5 times of measured piece inertia that the inertia of standard body meets, and after the assay was approved, tests product.

During barycenter eccentric testing, the setting of partial parameters has a great impact measurement result.Wherein, measuring accuracy depends primarily on the demarcation of L and Le.That L represents is testing apparatus P ₁, P ₂distance between sensor, what Le represented is the distance of accentric support seat to the inclined gauge head of matter.The part be connected with pedestal due to measurement bay supports by gauge head, and can contact and the value of L, Le can not be changed by guarantee point like this, so will record the value of two parameters, only the centre distance need measured between gauge head can realize the test of L, Le value.

Concrete demarcating steps is as follows:

(7) measurement bay bottom surface is rushed to placement, all gauge heads all rush to;

(8) with one finished flat board abut against on quality center of mass gauge head 2,3;

(9) arrange according to axis direction with slip gauge;

(4) measure the distance between quality center of mass gauge head 1 to last slip gauge with pit gauge, be designated as d;

(5) add that d value deducts the diameter of quality center of mass gauge head again by the length measured by slip gauge, just equal the length (add and will guarantee that the diameter of three quality center of mass gauge heads is identical man-hour) of L;

(6) measuring method of Le is identical with the measuring method of L;

(7) value of L, Le can be preserved in loading routine after measuring, and calculates for barycenter eccentric testing.

It is noted that the surveying work of L, Le value can complete before going out school, direct working procedure in practice.In addition it should be noted that installed two mobilizable V-type framves on measurement bay, be conveniently arrange to load different standard bodies.Value due to L determines by installing fixing gauge head below measurement bay, and can not there be impact the position changing V-type frame on gauge head below, therefore also can not have impact to the value of L.

The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.

Claims (1)

1. the eccentric scaling method of solid of revolution, is characterized in that: placed together by two standard bodies, and by comparing with theoretical value the measurement of assembly bias, whether malobservation is in allowed band; The computing formula of theoretical eccentric throw is:

Wherein: E is the eccentric throw of quality center of mass sample post and matter inclined sample column combination body; M ₁for the quality of the inclined sample post of matter; Φ ₁for the diameter of the inclined sample post of matter; M ₂for the quality of quality center of mass sample post; Φ ₂for the diameter of quality sample post;

Measure the barycenter of a standard body in state one, then standard body adjusted and measure a barycenter again as state two, two equations can be listed under above two states:

Wherein: X _c1for the state barycenter that a period of time, standard body was benchmark with B end face; X _c2for the barycenter that standard body during state two is benchmark with A end face; P ₁₂for state sensor P for the moment ₂stressed size; P ₂₂for sensor P during state two ₂stressed size; L ₀₁the standard body B end face recorded for the moment for state is to the distance of benchmark link stopper; L ₀₂for the standard body A end face that records during state two is to the distance of benchmark link stopper;

The length of the standard body of profile rule can measure, and is set to L, and its quality W is also known, that is:

Solve:

L can be measured by above-mentioned steps ₁value, preserved as testing apparatus parameter; For the ease of operation, devise a set of L ₀measuring system, finally realizes with bullet being base standard physique heart X by coordinate conversion _cmeasuring method; During barycenter eccentric testing, the setting of partial parameters has a great impact measurement result; Wherein, measuring accuracy depends primarily on the demarcation of L and Le; That L represents is testing apparatus P ₁, P ₂distance between sensor, what Le represented is the distance of accentric support seat to the inclined gauge head of matter; The part be connected with pedestal due to measurement bay supports by gauge head, and can contact and the value of L, Le can not be changed by guarantee point like this, so will record the value of two parameters, only the centre distance need measured between gauge head can realize the test of L, Le value; Concrete demarcating steps is as follows:

(1) measurement bay bottom surface is rushed to placement, all gauge heads all rush to;

(2) with one finished flat board abut against on quality center of mass gauge head 2,3;

(3) arrange according to axis direction with slip gauge;

(4) measure the distance between quality center of mass gauge head 1 to last slip gauge with pit gauge, be designated as d;

(5) add that d value deducts the diameter of quality center of mass gauge head again by the length measured by slip gauge, just equal the length (add and will guarantee that the diameter of three quality center of mass gauge heads is identical man-hour) of L;

(6) measuring method of Le is identical with the measuring method of L;

(7) value of L, Le can be preserved in loading routine after measuring, and calculates for barycenter eccentric testing.