CN102889846A - Method for measuring shape and position dimensions of product with skin-stringer structure - Google Patents

Abstract

The invention belongs to a measuring technology and in particular discloses a method for measuring the shape and position dimensions of a product with a skin-stringer structure. A measuring ring is placed above the product, and a rotary table is placed below the product. Contact surfaces of the measuring ring above the product, the rotary table below the product and product are standard planes, so the flatness of upper and lower surfaces of the product can be obtained through clearances among the upper and lower surfaces of the product, the measuring ring and the rotary table. Meanwhile, the rotary table below the product controls the product to rotate. Position points are uniformly marked on the measuring ring and the product, and a dial indicator is fixed at an appropriate position by adjusting a dial indicator fixing rack, so the dial indicator readings of the position points can be measured, and the coaxiality, parallelism and circularity of the upper and lower surfaces of the product are obtained.

Description

A kind of shape of skin stringer infrastructure product, the measuring method of position dimension

Technical field

The invention belongs to measuring technique, be specifically related to a kind of measuring method of skin stringer infrastructure product correlation parameter

Background technology

In spationautics, frame faces parallel before and after some physical dimension with the product of skin stringer structure mainly contain, front and back frame circularity, front frame are to the measurement to data such as after-frame right alignmenies of after-frame flatness, front frame.Owing to need in the riveted joint process, at any time these data be spot-check, detect, how convenient, fast, to finish above-mentioned DATA REASONING problem cheaply be vital.

Summary of the invention

The object of the present invention is to provide and a kind ofly can measure the shape of skin stringer infrastructure product, measurement mechanism and the method for position dimension.

Realize that technical scheme of the present invention is as follows:

A kind of shape of skin stringer infrastructure product, the measuring method of position dimension, the method includes the steps of:

1) will register pin be installed evenly on the limit of turntable; And evenly indicate respectively a location point at the upper and lower surface edge of product;

2) product is placed on the turntable periphery, and utilizes register pin the lower surface of product to be fixed on the turntable position between fixed product and the turntable;

3) lower surface that will measure ring is evenly installed register pin; And on the circumference of measuring the ring lower surface, evenly indicate a location point;

4) will measure ring and be placed on the product upper surface, and utilize register pin that the product upper surface is fixed together with measuring ring, the position between fixed product and the measurement ring;

5) clearance G between up and down one of them surface of measurement products and measurement encircle respectively ₁And the lower surface of product and the clearance G between the turntable ₂, draw the flatness F that determines respectively the upper and lower surface of product by following formula A;

F=Max(G ₁, G ₂) formula A

6) the table end with dial gauge is positioned over the position, a place of measuring the ring lower surface, and the dial gauge zeroing is rotated by turntable, and turntable rotates after the circle, obtains the dial gauge reading R of each location point of turntable circumference uniform distribution _i(i=1,2,3 ... a), draw respectively right alignment C and the depth of parallelism P of the upper and lower end face of product by following formula B, C;

$C=\mathrm{Max}\sqrt{{(R_{j+4}-R_j)}^2+{(R_{j+6}-R_{j+2})}^2}(j=\mathrm{1,2})$ Formula B

P=Max (R _i)-Min (R _i) (i=1,2 ... 8) formula C

7) will measure ring and remove from product, and pull out the pin that turntable and product lower surface are fixed;

8) the table end of dial gauge is positioned over the edge of product upper surface, the dial gauge zeroing is rotated a week with turntable, the dial gauge reading M of a that is uniformly distributed along the circumference location point of the product that record records _i(i=1,2,3 ... a), calculate the circularity R of the upper surface of product by following formula D _O1

${\mathrm{<figure-callout\; id="1"\; label="R\; O"\; filenames="HDA00002205141500011.png"\; state="\{\{state\}\}">R</figure-callout>}}_O=\frac{\mathrm{Max}\sqrt{{(M_{j+4}-M_j)}^2+{(M_{j+6}-M_{j+2})}^2}-\mathrm{Min}\sqrt{{(M_{j+4}-M_j)}^2+{(M_{j+6}-M_{j+2})}^2}}{2}(j=\mathrm{1,2})$

Formula D

9) the table end of dial gauge is positioned over the edge of product lower surface, the dial gauge zeroing is rotated a week with turntable, the dial gauge reading N of a that is uniformly distributed along the circumference location point of the product that record records _i(i=1,2,3 ... a), calculate the circularity R of the lower surface of product by following formula E _O2

$R_{O2}=\frac{\mathrm{Max}\sqrt{{(N_{j+4}-N_j)}^2+{(N_{j+6}-N_{j+2})}^2}-\mathrm{Min}\sqrt{{(N_{j+4}-N_j)}^2+{(N_{j+6}-N_{j+2})}^2}}{2}(j=\mathrm{1,2})$

Formula E

In the measuring method of the shape of above-mentioned skin stringer infrastructure product, position dimension, dial gauge 5 in the said method is mounted on the dial gauge fixed mount, in step 6), 8) and 9) in, by adjusting the height of dial gauge fixed mount, the table end of dial gauge is placed the position of needs.

In the measuring method of the shape of above-mentioned skin stringer infrastructure product, position dimension, above-mentioned steps 5) gap length in records by clearance gauge.

In the measuring method of the shape of above-mentioned skin stringer infrastructure product, position dimension, the number a of above-mentioned location point is 6 ~ 10.

Remarkable result of the present invention is: place above product and measure ring, turntable is placed in the below, because the measurement ring of product upper and lower and the surface of contact of turntable and product are the planes of standard, thereby by minute other gap between product upper and lower surface and measurement ring and the turntable, can obtain the flatness of product upper and lower surface; Simultaneously, turntable by the product below, the rotation of control product, owing to measuring even marker location point on ring and the product, by regulating the dial gauge fixed mount, dial gauge is fixing in place, thus measure the dial gauge number of degrees of location point, and then draw right alignment, the depth of parallelism and the circularity of product upper and lower surface.

Description of drawings

Fig. 1 is measuring method principle schematic of the present invention;

Among the figure: 1. measure ring; 2. product; 3. turntable; 4. dial gauge fixed mount; 5. dial gauge; 6. clearance gauge.

Embodiment

Below in conjunction with accompanying drawing the present invention is described in further detail

As shown in Figure 1, the measurement mechanism of using among the present invention comprises the measurement ring 1 and the turntable 3 of placing product 2 that is placed on product 2 upper surfaces of skin stringer, this measurement mechanism also comprises the dial gauge fixed mount 4 that is placed on product 2 one sides, fixed installation dial gauge 5 above it.

Because the upper and lower surface of product 2 is not hundred-percent plane, therefore the upper surface of product 2 mixes between 1, produces the gap between the upper surface of the lower surface of product 2 and turntable 3 with measuring, and the size of measuring above-mentioned gap just can indirectly draw the flatness of product 2 upper and lower surfaces.

Concrete measuring method is as follows:

1) preliminary work

A) will register pin be installed evenly on the limit of turntable 2; And evenly mark 8 location points at the edge of the upper and lower surface of product 2 to be measured;

B) product 2 is placed on turntable 3 peripheries, and utilizes register pin the lower surface of product 2 to be fixed on the turntable 3 position between fixed product 2 and the turntable 3;

C) lower surface that will measure ring 1 is evenly installed register pin; And on the circumference of measuring ring 1 lower surface, evenly indicate 8 location points;

D) will measure ring 1 and be placed on product 2 upper surfaces, and utilize register pin that product 2 upper surfaces are fixed together with measuring ring 1, the position between fixed product 2 and the measurement ring 1;

2) determine the flatness of product 2 upper surfaces

E) clearance G between the upper surface of difference measurement products 2 and the measurement ring 1 ₁And the clearance G between the lower surface of product 2 and the turntable 3 ₂, draw the flatness F that determines respectively product 2 upper and lower surfaces by following formula A;

F=Max(G ₁, G ₂) formula A

3) determine the flatness of product 2 lower surfaces

F) with step 2), utilize the lower surface of clearance gauge 6 measurement products 2 and the gap between the turntable 3, utilize above-mentioned formula A to determine the flatness of lower surface;

4) determine the right alignment on product 2 upper and lower surfaces

G) dial gauge 5 is fixed on the dial gauge fixed mount 4, adjust dial gauge fixed mount 4, the table end of dial gauge 5 is positioned over the position, a place of measuring ring 1 lower surface, dial gauge 5 zeroings, rotate by turntable 3, turntable 3 rotates after the circle, obtains measuring the dial gauge reading of 8 uniform on ring 1 lower surface circumference location points, and record, calculate the right alignment R of upper and lower end face _i(i=1,2,3 ... 8), draw respectively the right alignment C of product 2 upper and lower end faces by following formula B;

$C=\mathrm{Max}\sqrt{{(R_{j+4}-R_j)}^2+{(R_{j+6}-R_{j+2})}^2}(j=\mathrm{1,2})$ Formula B

5) determine the depth of parallelism of product 2 upper and lower surfaces

H) adjust dial gauge fixed mount 4, the table end of dial gauge 5 is positioned over the measurement ring 1 I quadrant place, plane that contacts with product 2 upper surfaces, and dial gauge 5 zeroings are rotated by turntable 3, after turntable 3 rotates a circle, obtain measuring the dial gauge reading R of 8 uniform on ring 1 circumference location points _i(i=1,2,3 ... 8), draw respectively the depth of parallelism P of product 2 upper and lower end faces by following formula C;

P=Max (R _i)-Min (R _i) (i=1,2 ... 8) formula C

6) determine the circularity of product 2 upper and lower surfaces

I) will measure ring 1 and remove from product 2, and pull out three fixing pins of turntable 3 and product 2 lower surfaces, and make product 2 be in free state;

J) adjust dial gauge fixed mount 4, the table end of dial gauge 5 is positioned over the I quadrant place, the face of cylinder of product 2 upper surfaces, dial gauge 5 zeroings are rotated by turntable 3, obtain Product 2Uniform 8 dial gauge reading M on the circumference _i(i=1,2,3 ... 8), calculate the circularity R of the upper surface of product 2 by following formula D _O1

${\mathrm{<figure-callout\; id="1"\; label="R\; O"\; filenames="HDA00002205141500011.png"\; state="\{\{state\}\}">R</figure-callout>}}_O=\frac{\mathrm{Max}\sqrt{{(M_{j+4}-M_j)}^2+{(M_{j+6}-M_{j+2})}^2}-\mathrm{Min}\sqrt{{(M_{j+4}-M_j)}^2+{(M_{j+6}-M_{j+2})}^2}}{2}(j=\mathrm{1,2})$

Formula D

K) adjust dial gauge and decide frame 4, the table end of dial gauge 5 is positioned over the I quadrant place, the face of cylinder of the lower surface of product 2, dial gauge 5 zeroings are rotated by turntable 3, obtain 8 dial gauge reading N uniform on the circumference of product 2 _i(i=1,2,3 ... a), calculate the circularity R of the lower surface of product 2 by following formula E _O2

${\mathrm{<figure-callout\; id="2"\; label="R\; O"\; filenames="HDA00002205141500011.png"\; state="\{\{state\}\}">R</figure-callout>}}_O=\frac{\mathrm{Max}\sqrt{{(N_{j+4}-N_j)}^2+{(N_{j+6}-N_{j+2})}^2}-\mathrm{Min}\sqrt{{(N_{j+4}-N_j)}^2+{(N_{j+6}-N_{j+2})}^2}}{2}(j=\mathrm{1,2})$

Formula E.

Claims (4)

1. the measuring method of the shape of a skin stringer infrastructure product, position dimension is characterized in that, the method includes the steps of:

1) will register pin be installed evenly on the limit of turntable (2); And evenly indicate respectively a location point at the upper and lower surface edge of product (2);

2) product (2) is placed on turntable (3) periphery, and utilizes register pin the lower surface of product (2) to be fixed on the turntable (3) position between fixed product (2) and the turntable (3);

3) lower surface that will measure ring (1) is evenly installed register pin; And on the circumference of measuring ring (1) lower surface, evenly indicate a location point;

4) will measure ring (1) and be placed on product (2) upper surface, and utilize register pin that product (2) upper surface is fixed together with measuring ring (1), the position between fixed product (2) and the measurement ring (1);

5) up and down one of them surface of difference measurement products (2) and the clearance G between the measurement ring (1) ₁And the clearance G between the lower surface of product (2) and the turntable (3) ₂, draw the flatness F that determines respectively the upper and lower surface of product (2) by following formula A;

F=Max(G ₁, G ₂) formula A

6) the table end with dial gauge (5) is positioned over the position, a place of measuring ring (1) lower surface, and dial gauge (5) zeroing is rotated by turntable (3), and turntable (3) rotates after the circle, obtains the dial gauge reading R of each location point of turntable (3) circumference uniform distribution _i(i=1,2,3 ... a), draw respectively right alignment C and the depth of parallelism P of the upper and lower end face of product (2) by following formula B, C;

Formula B

P=Max (R _i)-Min (R _i) (i=1,2 ... 8) formula C

7) will measure ring (1) and remove from product (2), and pull out the fixing pin of turntable (3) and product (2) lower surface;

8) the table end of dial gauge (5) is positioned over the edge of product (2) upper surface, dial gauge (5) zeroing is rotated a week with turntable (3), the dial gauge reading M of a that is uniformly distributed along the circumference location point of the product (2) that record records _i(i=1,2,3 ... a), calculate the circularity R of the upper surface of product (2) by following formula D _O1

Formula D

9) the table end of dial gauge (5) is positioned over the edge of product (2) lower surface, dial gauge (5) zeroing is rotated a week with turntable (3), the dial gauge reading N of a that is uniformly distributed along the circumference location point of the product (2) that record records _i(i=1,2,3 ... a), calculate the circularity R of the lower surface of product (2) by following formula E _O2

Formula E.

2. the measuring method of the shape of skin stringer infrastructure product as claimed in claim 1, position dimension, it is characterized in that: the dial gauge in the said method (5) is mounted on the dial gauge fixed mount (4), in step 6), 8) and 9) in, by adjusting the height of dial gauge fixed mount (4), the table end of dial gauge (5) is placed the position of needs.

3. the measuring method of the shape of skin stringer infrastructure product as claimed in claim 1 or 2, position dimension, it is characterized in that: the gap length above-mentioned steps 5) records by clearance gauge (6).

4. the measuring method of the shape of skin stringer infrastructure product as claimed in claim 1 or 2, position dimension, it is characterized in that: the number a of above-mentioned location point is 6 ~ 10.

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