CN86209978U

CN86209978U - Sine angle protractor

Info

Publication number: CN86209978U
Application number: CN 86209978
Authority: CN
Inventors: 王建业
Original assignee: Individual
Current assignee: Individual
Priority date: 1986-12-12
Filing date: 1986-12-12
Publication date: 1987-10-03

Abstract

The utility model discloses a sine angle protractor used in the precision measurement of the angle of members. A measuring tool with high measurement precision, which can measure the member which is machined, is required in the production field. Measuring with a universal protractor has no sufficient precision, and measuring with a sine protractor requires working on a platform. The repeated installation and correction of the member can influence the machining precision and the production efficiency. The sine angle protractor is an angle measuring tool designed by the sine principle. The utility model has the advantages of simple structure and high measuring precision. The precision can be improved by 7-25 times compared with the universal protractor. The sine angle protractor can be conveniently used in the measurement of the angle of the member which is machined.

Description

Sine angle protractor

The utility model relates to the measurement of angle of parts.

The instrument that is used for the parts measurement of angle at present has (being used for the production scene) and high-precision (measuring room) of general precision.What be used in the production scene has angular templet, universal protractor, a sine gauge etc.Angular templet is used to measure special angle; Universal protractor can be measured arbitrarily angled, but measuring error is bigger; But the parts angle of sine gauge altimetry precision is carried out on platform but surveying work is many, and is cumbersome.Lack the measuring accuracy height at present, and energy measurement is being processed the survey instrument of parts.

The purpose of inventing sinusoidal bevel protractor is to improve the degree of accuracy of existing survey instrument, and can easily be used for the production scene.

Sinusoidal bevel protractor is the combination of universal protractor and sine gauge technology, and it has overcome both deficiencies, has preserved advantage separately.In the accompanying drawing, on the chi body 2 reticule is arranged, the baseplane of adjusting angle measurement α is arranged, chi body and bearing pin 10 interference fit, main scale 7 can slide in the groove on the chi body.Sine protractor 5, survey post 6 and form one, the vernier reticule is arranged on it with alidade 1, it and bearing pin 10 little clearance fit, when it rotates on bearing pin, above the main scale below sine protractor formation α angle.α is when zero-bit, and below the sine protractor, survey post Down Highway and coplane above the main scale, and survey post, bearing pin two axial lines formed plane are parallel with chi body bottom surface.Because it is constant surveying the distance of post 6 axis and bearing pin 10 axis, so rotational angle α and size H(gauge block size) be the sine function relation.During use, institute's angle measurement degree tolerance＞± 2 ', use the vernier of chi body 2, alidade 1 to guarantee; When institute's angle measurement degree tolerance＜± 2 ' time, use sine method to measure, calculate gauge block size H, H=M+Lsin α according to the survey angle [alpha] earlier

In the formula: M---chi body 2 bottom surfaces and main scale 7 top measured distances, mark behind the elimination combined error,

L---survey the distance of post 6 and bearing pin 10 two axial lines.

Flat surface is close in chi body 2 bottom surfaces, and gauge block H is put on the platform, unclamps knurled nut 14, rotates sine protractor 5, after survey post 6 Down Highways are close to above the gauge block, and fastening knurled nut 14, the sine protractor 5 following and main scale 7 top angle α that form.Because the varies with sinusoidal function amplitude is different, α is more near zero degree, and the function amplitude is bigger, and the measuring error of α is littler; Otherwise, α is more near 90 °, the function amplitude is littler, the α measuring error is bigger, at α is between 0-60 °, according to the control accuracy of size H, the measuring error of sinusoidal bevel protractor is ± (10 " 40 "), improves measuring accuracy 6-24 doubly (press the universal protractor measuring error be ± 4 ') than existing universal protractor.For improving the measuring accuracy of α in 60 ° of-90 ° of scopes, can use secondary chi 16 instead, 30 ° on the chi body 2 are exactly 60 ° of angles that-90 ° of scopes are interior on the parts for-60 ° like this.When survey α is 90 °-180 °, use angle square 15 instead.

Sinusoidal bevel protractor is compared with existing universal protractor, and sinusoidal bevel protractor has been preserved universal protractor measurement range advantage wide, easy to use, and the measuring accuracy of α improves 6-24 doubly simultaneously.

Description of drawings: garden taper pin 4 is used for fixing sine protractor 5 and is integral with alidade 1, sunk screw 3 securing cover plates 8, and pointless screw 9 is used to locate main scale 7, angle square 15 and secondary chi 16.

The embodiment explanation:

1. survey post 6 Down Highways and sine protractor 5 following coplanes,

0.003.

2. it is consistent to reach main scale 7 top distances with bearing pin 10 axis below the sine protractor 5, when promptly chi body 2 aligns zero-bit with alidade 1, and two plane coplanes,

0.005.

3. bearing pin 10 and alidade 1 tolerance clearance 0.002-0.005.

4. chi body 2 bottom surfaces are with parallel above the main scale 7, and ∥ 0.01, and the actual measurement two sides is apart from the M value.

5. decide the M value after eliminating 1,2,4 every errors.

6. 30 ° of deviation ± 0.005 of secondary chi 16 angles.

Angle square 15 perpendicularity deviations ± 0.005.

Surveying post 6 axis and bearing pin 10 axial line distance is L, L=100 ± 0.01.

7. when using angle square 15, secondary chi 16, by actual deviation correction M value.

Claims

1, a kind of sinusoidal bevel protractor of measuring the parts angle is made up of alidade [1], chi body [2], sine protractor [5], survey post [6], main scale [7], bearing pin main parts such as [10], it is characterized in that:

A, sine protractor [5], survey post [6] are formed one with alidade [1],

A baseplane of adjusting the angle [alpha] of surveying is arranged on b, the chi body [2].

2, sinusoidal bevel protractor according to claim 1 is characterized in that angle measurement α when zero-bit, below the sine protractor (5), survey post (6) Down Highway and the top coplane of main scale (7).

3, sinusoidal bevel protractor according to claim 1 is characterized in that angle measurement α when zero-bit, surveys post (6), bearing pin (10) two axial lines formed plane is parallel with chi body (2) bottom surface.

4, sinusoidal bevel protractor according to claim 1 is characterized in that size M gets measured value, and marks after eliminating combined error.

5, sinusoidal bevel protractor according to claim 1, it is characterized in that the parts angle of surveying in 60 ° of-90 ° of scopes the time, use secondary chi (16) instead.