CN102889846B - 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, some physical dimension with the product of skin stringer structure mainly contain front and back frame faces parallel, front and back frame circularity, front frame to after-frame flatness, front frame to the measurement of the data such as after-frame right alignment.Because needs are in riveting process, at any time these data spot-check, are detected, how convenient, fast, low cost to complete above-mentioned DATA REASONING problem 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, the measurement mechanism of position dimension and method.

Realize technical scheme of the present invention as follows:

The shape of skin stringer infrastructure product, a measuring method for position dimension, the method includes the steps of:

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

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

3) lower surface measuring ring is evenly installed register pin; And circumferentially evenly indicate a location point what measure ring lower surface;

4) measurement ring is placed on product upper surface, and utilizes register pin product upper surface and measurement ring to be fixed together, fixed product and the position measured between ring;

5) one of them clearance G that is surperficial and that measure between ring upper and lower of difference measurement products ₁and the clearance G between the lower surface of product and turntable ₂, the flatness F determining the upper and lower surface of product is respectively drawn by following formula A;

F=Max(G ₁, G ₂) formula A

6) the table end of dial gauge is positioned over the position, place measuring ring lower surface, dial gauge returns to zero, and is rotated by turntable, and turntable obtains the dial gauge reading R of each location point of turntable circumference uniform distribution after rotating a circle _i(i=1,2,3 ... a), right alignment C and the depth of parallelism P of the upper and lower end face of product is drawn respectively 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) measurement ring is removed from product, and pull out the fixing pin of turntable and product lower surface;

8) the table end of dial gauge is positioned over the edge of product upper surface, dial gauge returns to zero, and is rotated one week by turntable, records the dial gauge reading M of a be uniformly distributed along the circumference location point of the product recorded _i(i=1,2,3 ... a), the circularity R of the upper surface of product is calculated by following formula D _o1;

$R_{O1}=\frac{\mathrm{Max}\sqrt{{(M_{j+4}-M_j)}^2+{(M_{j+6}-M_{j+2})}^2}-\mathrm{Min}\sqrt{{(M_{j+4}-M_j)}^2+{(M_{j+6}-M_{j+2})}^2}}{2}(j=\mathrm{1,2})$

Formula D

9) the table end of dial gauge is positioned over the edge of product lower surface, dial gauge returns to zero, and is rotated one week by turntable, records the dial gauge reading N of a be uniformly distributed along the circumference location point of the product recorded _i(i=1,2,3 ... a), the circularity R of the lower surface of product is calculated 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 said method is mounted on dial gauge fixed mount, in step 6), 8) and 9) in, by the height of adjustment dial gauge fixed mount, the table end of dial gauge is placed in the position of needs.

In the measuring method of the shape of above-mentioned skin stringer infrastructure product, position dimension, above-mentioned steps 5) in gap length recorded 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 below, due to the plane that the measurement ring of product upper and lower and the surface of contact of turntable and product are standards, thus divide other gap by product upper and lower surface and between measurement ring and turntable, the flatness of product upper and lower surface can be obtained; Simultaneously, by the turntable below product, control product rotates, due to marker location point even on measurement ring and product, by regulating dial gauge fixed mount, thus measure the dial gauge number of degrees of location point in place by fixing for dial gauge, and then draw the right alignment of product upper and lower surface, the depth of parallelism and circularity.

Accompanying drawing explanation

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

In 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 used in the present invention comprises the turntable 3 of measurement the ring 1 and placement product 2 be placed on product 2 upper surface of skin stringer, this measurement mechanism also comprises the dial gauge fixed mount 4 being placed on product 2 side, fixedly mounts dial gauge 5 above it.

Upper and lower surface due to product 2 is not absolutely plane, therefore product 2 upper surface and measure between mixed 1, between the lower surface of product 2 and the upper surface of turntable 3, produce gap, the size measuring above-mentioned gap just indirectly can draw the flatness of product 2 upper and lower surface.

Concrete measuring method is as follows:

1) preliminary work

A) by the limit of turntable 2, register pin is evenly installed; 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 periphery, and utilizes register pin to be fixed on turntable 3 by the lower surface of product 2, the position between fixed product 2 and turntable 3;

C) lower surface measuring ring 1 is evenly installed register pin; And circumferentially evenly indicate 8 location points what measure ring 1 lower surface;

D) measurement ring 1 is placed on product 2 upper surface, and utilizes register pin product 2 upper surface and measurement ring 1 to be fixed together, fixed product 2 and the position measured between ring 1;

2) flatness of product 2 upper surface is determined

E) upper surface distinguishing measurement products 2 and the clearance G measured between ring 1 ₁and the clearance G between the lower surface of product 2 and turntable 3 ₂, the flatness F determining the upper and lower surface of product 2 is respectively drawn by following formula A;

F=Max(G ₁, G ₂) formula A

3) flatness of product 2 lower surface is determined

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

4) right alignment on the upper and lower surface of product 2 is determined

G) dial gauge 5 is fixed on dial gauge fixed mount 4, adjustment dial gauge fixed mount 4, the table end of dial gauge 5 is positioned over the position, place measuring ring 1 lower surface, dial gauge 5 returns to zero, rotated by turntable 3, after turntable 3 rotates a circle, obtain the dial gauge reading measuring 8 circumferentially uniform location points of ring 1 lower surface, and record, calculate the right alignment R of upper and lower end face _i(i=1,2,3 ... 8) the right alignment C of the upper and lower end face of product 2, is drawn respectively 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) depth of parallelism of product 2 upper and lower surface is determined

H) dial gauge fixed mount 4 is adjusted, the table end of dial gauge 5 is positioned over the plane I quadrant place measured ring 1 and contact with product 2 upper surface, dial gauge 5 returns to zero, and is rotated by turntable 3, after turntable 3 rotates a circle, obtain the dial gauge reading R measuring 8 circumferentially uniform location points of ring 1 _i(i=1,2,3 ... 8) depth of parallelism P of the upper and lower end face of product 2, is drawn respectively by following formula C;

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

6) circularity of product 2 upper and lower surface is determined

I) ring 1 will be measured remove from product 2, and pull out turntable 3 three pins fixing with product 2 lower surface, 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 quadrant place, the face of cylinder I of product 2 upper surface, dial gauge 5 returns to zero, and is rotated, obtain by turntable 3 product 2the dial gauge reading M of circumferentially uniform 8 _i(i=1,2,3 ... 8) the circularity R of the upper surface of product 2, is calculated by following formula D _o1;

$R_{O1}=\frac{\mathrm{Max}\sqrt{{(M_{j+4}-M_j)}^2+{(M_{j+6}-M_{j+2})}^2}-\mathrm{Min}\sqrt{{(M_{j+4}-M_j)}^2+{(M_{j+6}-M_{j+2})}^2}}{2}(j=\mathrm{1,2})$

Formula D

K) adjust dial gauge and determine frame 4, the table end of dial gauge 5 is positioned over the quadrant place, the face of cylinder I of the lower surface of product 2, dial gauge 5 returns to zero, and is rotated by turntable 3, obtains the circumferentially uniform dial gauge reading N of 8 of product 2 _i(i=1,2,3 ... a), the circularity R of the lower surface of product 2 is calculated 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

Claims (4)

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

1) evenly register pin is installed by the limit of turntable (3); And at the upper and lower marginal surface place of product (2), circumferentially evenly indicate a location point respectively;

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

3) lower surface measuring ring (1) is evenly installed register pin; And measure ring (1) lower surface circumferentially evenly indicate a location point;

4) ring (1) will be measured and be placed on product (2) upper surface, and utilize register pin product (2) upper surface and measurement ring (1) to be fixed together, fixed product (2) and the position measured between ring (1);

5) upper and lower clearance G between one of them surface and measurement ring (1) of difference measurement products (2) ₁and the clearance G between the lower surface of product (2) and turntable (3) ₂, the flatness F determining product (2) upper and lower surface is respectively drawn by following formula A;

F=Max (G ₁, G ₂) formula A

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

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

P=Max (R _i)-Min (R _i), wherein i=1,2,3 ... a formula C

7) ring (1) will be measured remove from product (2), and pull out turntable (3) register pin fixing with 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) returns to zero, turntable (3) is rotated one week, records the dial gauge reading M of a be uniformly distributed along the circumference location point of product (2) upper surface recorded _i, wherein i=1,2,3 ... a, calculates the circularity R of the upper surface of product (2) by following formula D _o1;

$R_{O1}=\frac{\mathrm{Max}\left(\sqrt{{(M_{j+4}-M_j)}^2+{(M_{j+6}-M_{j+2})}^2}\right)-\mathrm{Min}\left(\sqrt{{(M_{j+4}-M_j)}^2+{(M_{j+6}-M_{j+2})}^2}\right)}{2},$

Wherein j=1,2 formula D

9) the table end of dial gauge (5) is positioned over the edge of product (2) lower surface, dial gauge (5) returns to zero, turntable (3) is rotated one week, records the dial gauge reading N of a be uniformly distributed along the circumference location point of product (2) lower surface recorded _i, wherein i=1,2,3 ... a, calculates the circularity R of the lower surface of product (2) by following formula E _o2;

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

Wherein j=1,2 formula E.

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

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

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