A measuring tool and a measuring method for measuring the symmetry between a plane and a reference

Abstract

The present invention relates to the field of aviation parts processing technology, and specifically to a measuring tool and a measuring method for measuring the symmetry between a plane and a reference. It directly measures the symmetry between a plane and a reference, has high measurement accuracy, can improve measurement efficiency, avoid or reduce measurement errors caused by other measurement methods, and make the measurement of the symmetry between the plane and the reference more accurate and the detection more efficient. The technical solution adopted by the present invention includes a rectangular measuring tool base, the base is symmetrically provided with a first L-shaped block and a second L-shaped block, the upper part of the measuring tool base is symmetrically provided with support screws one and two support screws, the tops of the support screws one and two support screws are respectively provided with a first pressure plate and a second pressure plate, a guide sleeve is provided on the measuring tool base between the first L-shaped block and the second L-shaped block, a measuring block is provided on the measuring tool base between the support screws one and the support screws two, the measuring block and the guide sleeve are provided on an axis, and a certain measurement method is used for measurement.

Description

Technical Field

[0001] The invention relates to the technical field of aviation parts processing, and in particular to a measuring tool and a measuring method for measuring the symmetry between a plane and a reference. Background Art

[0002] Aviation fuel switch piston parts are mainly used in the connection between the fuel in the combustion chamber of an aircraft engine and the swirl chamber. There is currently no direct and effective measurement solution for the plane and reference symmetry of the fuel switch piston parts. The three-coordinate measurement method for establishing the reference is usually used for measurement. Due to its irregular shape and the large number of line segments and arcs that make up the shape, it takes a long time and has poor accuracy to establish the angular reference and positioning surface with three coordinates.

[0003] Therefore, in order to measure the symmetry between the part plane and the reference, a new measuring tool is designed to determine the reasonable part positioning surface and measuring surface, so as to meet the requirements of measuring the symmetry between the plane and the reference. Summary of the invention

[0004] The present invention aims to provide a measuring tool and a measuring method for measuring the symmetry between a plane and a reference, which directly measures the symmetry between the plane and the reference with high measurement accuracy, can improve measurement efficiency, avoid or reduce measurement errors caused by other measurement methods, and make the measurement of the symmetry between the plane and the reference more accurate and the detection more efficient.

[0005] In order to solve the problems existing in the prior art, the technical solution of the present invention is: a measuring tool for measuring the symmetry between a plane and a reference, comprising a rectangular measuring tool base, characterized in that: a first L-shaped block and a second L-shaped block are symmetrically arranged at the lower part of the measuring tool base, a V-shaped groove is arranged at the top of the first L-shaped block and the second L-shaped block, the depth of the V-shaped groove of the first L-shaped block is greater than the depth of the V-shaped groove of the second L-shaped block, a guide sleeve is arranged on the measuring tool base between the first L-shaped block and the second L-shaped block; a plug screw is arranged in the guide sleeve, a spring is sleeved on the plug screw, a support block is arranged on the spring, the support block extends from the top of the guide sleeve, and a plug screw is symmetrically arranged at the upper part of the measuring tool base. There are support screw 1 and support screw 2, the top of the support screw 1 and the support screw 2 are respectively provided with a first pressure plate and a second pressure plate, the other ends of the first pressure plate and the second pressure plate are arranged on the upper part of the high sides of the first L-shaped block and the second L-shaped block, the first pressure plate and the second pressure plate are respectively provided with waist-shaped grooves, a stud 1 is passed through the waist-shaped groove of the first pressure plate, a stud 2 is passed through the waist-shaped groove of the second pressure plate, a screw nut 1 is arranged on the stud 1 on the first pressure plate, a screw nut 2 is arranged on the stud 2 on the second pressure plate, a measuring block is arranged on the measuring tool base between the support screw 1 and the support screw 2, and the measuring block and the guide sleeve are arranged on an axis.

[0006] Further, the axes of the first support screw and the second support screw are respectively in a straight line with the axes of the high sides of the first L-shaped block and the second L-shaped block.

[0007] Furthermore, a stopper is provided on the left side of the first L-shaped block, and the stopper is connected to the first L-shaped block via a screw.

[0008] Furthermore, washers are arranged on the stud bolts 1 and 2 under the screw nuts 1 and 2.

[0009] A measuring method for measuring the symmetry between a plane and a reference comprises the following steps:

[0010] 1): Place the base of the measuring tool on a flat workbench, place the large end positioning circle of the measured part in the V-shaped groove of the first L-shaped block, and the small end positioning circle of the part in the V-shaped groove of the second L-shaped block, so that the large end positioning circle of the part fits with the V-shaped groove of the first L-shaped block, and the small end positioning circle of the part fits with the V-shaped groove of the second L-shaped block;

[0011] 2): Install the first pressing plate so that one end of the first pressing plate presses the large end positioning circle of the part, and the other end of the first pressing plate is placed on supporting screw 1, and nut 1 is tightened to fix the large end of the part on the first L-shaped block.

[0012] 3): Install the second pressure plate so that one end of the second pressure plate presses the small end positioning circle of the part, and the other end of the second pressure plate is placed on the second support screw, and the second nut is tightened to fix the small end of the part on the second L-shaped block. At this time, the large end positioning surface of the part automatically fits with the upper end surface of the support block.

[0013] 4): Compare the height difference between the measuring plane and the measuring block 28, which is the symmetry between the measuring plane and the reference.

[0014] Compared with the prior art, the advantages of the present invention are as follows:

[0015] 1) The present invention arranges a first V-shaped block and a second V-shaped block so that the positioning surfaces on both sides of the first V-shaped block fit with the outer circle of the large end of the measured part, and the positioning surfaces on both sides of the second V-shaped block fit with the outer circle of the small end of the measured part. The V-shaped blocks are used for positioning, and the parts have high repeatability positioning accuracy and are convenient and quick to position.

[0016] 2) The present invention arranges a movable support block in the guide sleeve so that the lower end positioning surface of the part fits with the upper end positioning surface of the support block. The small gap between the positioning surface of the part and the support block is precisely matched to ensure that the positioning surface of the part is always parallel to the support block, thereby achieving accurate angular positioning of the part;

[0017] 3) The present invention sets a measuring block. When measuring the symmetry, as long as the upper end surface of the part is located between the upper and lower measuring surfaces of the measuring block, the symmetry is considered qualified, and the part detection is convenient and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention;

[0019] Figure 2 yes Figure 1 A top view of

[0020] Figure 3 yes Figure 1 Right side view;

[0021] Figure 4 is a schematic diagram of the base structure;

[0022] Figure 5 It is an enlarged schematic diagram of point D;

[0023] Figure 6 It is a schematic diagram of the structure inside the guide sleeve;

[0024] Explanation of the accompanying drawings: 1-measuring tool base, 2-threaded hole one, 3-threaded hole two, 4-positioning hole one, 5-threaded hole three, 6-positioning hole two, 7-positioning hole three, 8-first L-shaped block, 9-screw one, 10-stopper, 11-pin one, 12-screw two, 13-first pressure plate, 14-stud one, 15-screw nut one, 16-support screw one, 17-second pressure plate, 18-stud two, 19-screw nut two, 20-support screw two, 21-second L-shaped block, 22-pin two, 23-screw three, 24-guide sleeve, 25-support block, 26-plug screw 27-spring, 28-measuring block, 29-part, A surface-measuring plane, B surface-large end positioning surface. DETAILED DESCRIPTION

[0025] The following is a detailed description of this design with the accompanying drawings:

[0026] The present invention provides a measuring tool for measuring the symmetry between a plane and a reference, such as Figure 1-3 As shown, it includes a rectangular measuring tool base 1; the first L-shaped block 8 and the second L-shaped block 21 are symmetrically arranged at the lower part of the measuring tool base 1, and the first L-shaped block 8 is connected to the fixture base 1 through a pin 11 and a screw 2 12; the second L-shaped block 21 is connected to the fixture base 1 through a pin 22 and a screw 3 23; a stopper 10 is arranged on the left side of the first L-shaped block 8, and the stopper 10 is connected to the first L-shaped block 8 through a screw 1 9, and the stopper 10 is used to block the end face of the part to prevent the part from moving axially;

[0027] The tops of the first L-shaped block 8 and the second L-shaped block 21 are provided with V-shaped grooves, the depth of the V-shaped grooves of the first L-shaped block 8 is greater than the depth of the V-shaped grooves of the second L-shaped block 21, and a guide sleeve 24 is provided on the intermediate measuring tool base 1 of the first L-shaped block 8 and the second L-shaped block 21; a plug screw 26 is provided in the guide sleeve 24, a spring 27 is sleeved on the plug screw 26, a support block 25 is provided on the spring 27, and the support block 25 extends out of the top of the guide sleeve 24.

[0028] The upper part of the measuring tool base 1 is symmetrically provided with a support screw 16 and a support screw 20, the axes of which are respectively in a straight line with the axes of the high sides of the first L-shaped block 8 and the second L-shaped block 21, and the tops of the support screws 16 and 20 are respectively provided with a first pressing plate 13 and a second pressing plate 17, the other ends of which are provided at the upper parts of the high sides of the first L-shaped block 8 and the second L-shaped block 21, and the first pressing plate 13 Waist-shaped grooves are respectively provided on the first pressing plate 13 and the second pressing plate 17, a stud 14 is passed through the waist-shaped groove of the first pressing plate 13, a stud 2 18 is passed through the waist-shaped groove of the second pressing plate 17, a screw nut 15 is provided on the stud 14 on the first pressing plate 13, a screw nut 2 19 is provided on the stud 2 18 on the second pressing plate 17, a measuring block 28 is provided on the measuring tool base 1 between the supporting screws 16 and 20, and the measuring block 28 and the guide sleeve 24 are provided on an axis.

[0029] Gaskets are provided on the stud one 14 and the stud two 18 under the screw nut one 15 and the screw nut two 19 .

[0030] The lower center of the measuring tool base 1 is provided with a positioning hole 3 7, and two groups of threaded holes 3 5 and two groups of positioning holes 2 6 are symmetrically and longitudinally arranged on both sides of the positioning hole 7, and the two groups of positioning holes 2 6 are arranged in the middle of the two groups of threaded holes 3 5; the upper part of the base 1 is provided with a threaded hole 1 2 and a threaded hole 2 3, and the base 1 is provided with a positioning hole 1 4 near the threaded hole 1 2, such as Figure 1 shown.

[0031] The measuring block 28 is inserted into the positioning hole 4 and connected to the base 1. The guide sleeve 24 is inserted into the positioning hole 7 and connected to the base 1. The two threaded holes 2 and the threaded holes 3 are respectively connected to the support screw 16, the support screw 20, the stud 14 and the stud 18. The two groups of threaded holes 3 5 and the two groups of positioning holes 2 6 are respectively connected to the first L-shaped block 8 and the second L-shaped block 21 with the measuring base 1 through the screw 2 12, the pin 11 and the screw 3 23, the pin 22.

[0032] There are two threaded holes 2, two threaded holes 3, four threaded holes 3, and four positioning holes 2 6.

[0033] The pin 11 is provided with two, the screw 2 12 is provided with two, the pin 2 22 is provided with two, and the screw 3 23 is provided with two.

[0034] A measuring method for a measuring tool for measuring the symmetry between a plane and a reference comprises the following steps:

[0035] Step 1: Place the measuring tool base 1 on a flat workbench, place the large end positioning circle of the measured part 29 in the V-shaped groove of the first L-shaped block 8, and place the small end positioning circle of the part 29 in the V-shaped groove of the second L-shaped block 21, so that the large end positioning circle of the part fits with the V-shaped groove of the first L-shaped block 8, and the small end positioning circle of the part fits with the V-shaped groove of the second L-shaped block 21, push the part 29 toward the first L-shaped block 8, so that the left end face of the part 29 fits with the stopper 10;

[0036] Step 2: Install the first pressing plate 13, so that one end of the first pressing plate 13 presses the large end positioning circle of the part 29, and the other end of the first pressing plate 13 is placed on the supporting screw 16, and the nut 15 is tightened to fix the large end of the part 29 on the first L-shaped block 8;

[0037] Step 3: Install the second pressing plate 17, so that one end of the second pressing plate 17 presses the small end positioning circle of the part 29, and the other end of the second pressing plate 17 is placed on the second supporting screw 20, and the second nut 19 is tightened to fix the small end of the part 29 on the second L-shaped block 21. At this time, the large end positioning surface (surface B) of the part 29 automatically fits with the upper end surface of the supporting block 25;

[0038] Step 4: Compare the height difference between the measuring plane (plane A, i.e. the measuring plane described in the present invention) and the measuring block 28, i.e. the symmetry between the measuring plane and the reference.

[0039] Explanation of measurement results: If the measurement plane (surface A) is higher than the a2 surface of the measurement block 28 and lower than the a1 surface of the measurement block 28, the symmetry of the measurement plane to the reference is qualified; if the measurement plane (surface A) is lower than the a2 surface of the measurement block 28, the symmetry of the measurement plane to the reference is unqualified; if the measurement plane (surface A) is higher than the a1 surface of the measurement block 28, the symmetry of the measurement plane to the reference is unqualified;

[0040] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Any changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention shall fall within the protection scope of the present invention.

Claims

1. A method for measuring a measuring tool for measuring the symmetry between a plane and a reference, the measuring tool comprising a rectangular measuring tool base (1), characterized in that: The lower part of the measuring tool base (1) is symmetrically provided with a first L-shaped block (8) and a second L-shaped block (21); the tops of the first L-shaped block (8) and the second L-shaped block (21) are provided with V-shaped grooves; the depth of the V-shaped groove of the first L-shaped block (8) is greater than the depth of the V-shaped groove of the second L-shaped block (21); a guide sleeve (24) is provided on the measuring tool base (1) between the first L-shaped block (8) and the second L-shaped block (21); a plug screw (26) is provided in the guide sleeve (24); a spring (27) is sleeved on the plug screw (26); a support block (25) is provided on the spring (27); the support block (25) extends out of the top of the guide sleeve (24); the upper part of the measuring tool base (1) is symmetrically provided with a first support screw (16) and a second support screw (20); the tops of the first support screw (16) and the second support screw (20) are A first pressing plate (13) and a second pressing plate (17) are respectively provided, the other ends of the first pressing plate (13) and the second pressing plate (17) are arranged on the upper part of the high sides of the first L-shaped block (8) and the second L-shaped block (21), the first pressing plate (13) and the second pressing plate (17) are respectively provided with waist-shaped grooves, a stud one (14) is inserted into the waist-shaped groove of the first pressing plate (13), a stud two (18) is inserted into the waist-shaped groove of the second pressing plate (17), a butterfly nut one (15) is arranged on the stud one (14) on the first pressing plate (13), a butterfly nut two (19) is arranged on the stud two (18) on the second pressing plate (17), a measuring block (28) is arranged on the measuring tool base (1) between the supporting screw one (16) and the supporting screw two (20), and the measuring block (28) and the guide sleeve (24) are arranged on an axis; The steps of the method described are: 1): Place the measuring tool base (1) on a flat workbench, place the large end positioning circle of the measured part (29) in the V-shaped groove of the first L-shaped block (8), and place the small end positioning circle of the part (29) in the V-shaped groove of the second L-shaped block (21), so that the large end positioning circle of the part fits in the V-shaped groove of the first L-shaped block (8), and the small end positioning circle of the part fits in the V-shaped groove of the second L-shaped block (21); 2): Install the first pressing plate (13) so that one end of the first pressing plate (13) presses the large end positioning circle of the part (29), and the other end of the first pressing plate (13) is placed on the supporting screw 1 (16), and the butterfly nut 1 (15) is tightened to fix the large end of the part (29) on the first L-shaped block (8); 3): Install the second pressing plate (17) so that one end of the second pressing plate (17) presses the small end positioning circle of the part (29), and the other end of the second pressing plate (17) is placed on the second supporting screw (20), and the second butterfly nut (19) is tightened to fix the small end of the part (29) on the second L-shaped block (21). At this time, the large end positioning surface (surface B) of the part (29) automatically fits with the upper end surface of the supporting block (25); 4): Compare the height difference between the measuring plane (surface A) and the measuring block 28, which is the symmetry between the measuring plane and the reference.

2. The method for measuring the symmetry between a plane and a reference according to claim 1, characterized in that: The axes of the first supporting screw (16) and the second supporting screw (20) are respectively in a straight line with the axes of the high sides of the first L-shaped block (8) and the second L-shaped block (21).

3. A method for measuring a measuring tool for measuring the symmetry between a plane and a reference according to claim 1 or 2, characterized in that: A stopper (10) is provided on the left side of the first L-shaped block (8), and the stopper (10) is connected to the first L-shaped block (8) via a screw 1 (9).

4. The measuring method of a measuring tool for measuring the symmetry between a plane and a reference according to claim 3, characterized in that: Gaskets are provided on the stud bolt 1 (14) and the stud bolt 2 (18) under the butterfly nut 1 (15) and the butterfly nut 2 (19).

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