CN106907967B - Method for detecting virtual size of extension intersection point of double-cutting and rounding of two side edges - Google Patents
Method for detecting virtual size of extension intersection point of double-cutting and rounding of two side edges Download PDFInfo
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- CN106907967B CN106907967B CN201710036437.4A CN201710036437A CN106907967B CN 106907967 B CN106907967 B CN 106907967B CN 201710036437 A CN201710036437 A CN 201710036437A CN 106907967 B CN106907967 B CN 106907967B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
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- General Physics & Mathematics (AREA)
- Length-Measuring Instruments Using Mechanical Means (AREA)
Abstract
The invention discloses a detection method for virtual dimensions of extension intersection points of double-cutting and rounding edges of two sides, and aims to provide a rapid detection method which is simple and convenient to detect and accurate in positioning. The invention is realized by the following technical scheme that an auxiliary detection tool for a main scale (2) with measurement scales is manufactured according to a part to be detected (4), wherein an opening caliper with a finger ring handle ring (3) is fixed on the semicircular arc center of the end of the main scale by a positioning pin (7). When the virtual size of the double-cutting and rounding extension intersection point of two sides of the part to be detected (4) is detected, the opening calipers rotate around the locating pins according to the angle of the two sides of the part to be detected, the vernier outer measuring claw (5) is attached to the measuring reference edge of the part to be detected, the distance from the vertex of the opening angle of the inner side closed locating surface of the movable arm clamping claw (1) of the opening calipers to the measuring reference edge of the part to be detected (4) is measured, and the virtual size X of the double-cutting and rounding extension intersection point of the two sides of the part to be detected can be obtained by reading the scale on the main scale.
Description
Technical Field
The invention relates to a virtual size detection method for a double-cutting and rounding extension intersection point of two side edges on a mechanical part and a universal auxiliary detection tool for detecting virtual points.
Technical Field
In the manufacturing process of the mechanical industry, the double-cutting and rounding of two side surfaces can establish a fillet position degree between two groups of separated entities/sheets, which is an index for limiting the variation of the position of an actual element to an ideal element, and is often a difficulty in production and inspection. The mechanical part has a very large number of structural features, wherein the chamfer or rounding of two side faces is a part of different entities of the selected curved surface double-tangent adjacent intersection area and/or one or two entity intersection areas, and can be connected with the rounded intersection area into a whole, the radius of the rounded corner of the intersection area can be constant, the radius of the rounded corner of the intersection area can be changed regularly, or the position size controlled by the tangent of the intersection area is one of the features. In a curved surface model of a rounded surface of a common boundary of a rounded composite curved surface of two sides, three sides and four sides of a typical cube, curved surfaces S1, S2, S3 and S4 of adjacent or non-adjacent areas of intersection are arranged. The detection of the extended virtual point of the intersection point of the hyperbolic radius rounded curve is a detection difficulty, and particularly the detection of the extended virtual point of the intersection point of the hyperbolic radius rounded curve is a more difficult point. In order to ensure the processing quality of products and smooth assembly production, quality problems can be found in time, the quality of the products can be monitored and kept at a premium, meanwhile, in order to improve the inspection efficiency, a position degree inspection tool is often used in production to inspect and control the linear end points of virtual points of extension of double-cut rounded parts, in particular to airplane joints and frame beam parts with rounded chamfers, parts with double-cut adjacent intersection area structural features, two double-bent sheet metal structural parts, parts with three rounded curved surfaces being convex to the structural features of the rounded curved surfaces, and even parts with two adjacent sides being concave to the structural features of the rounded curved surfaces. One type of aircraft joint parts is provided with a rounding, the extending positions of the double-cut ends of the two sides of the rounding are often required to be determined by taking the extending virtual intersection points of the two sides as the appointed measuring origin, but when the two sides are double-cut and rounded or double-cut and chamfered, the appointed measuring origin from the straight line end points of the double-cut extension of the two sides to the extending intersection points on the straight line segments intersecting with the straight line end points is only one virtual point, and the appointed measuring origin is actually detected to be an uncertain virtual size. How to quickly and accurately detect the double-cut virtual point position size of the characteristics and ensure the structural relationship of the whole parts is a key problem. At present, most of aircraft manufacturers at home and abroad use an empirical method to solve the detection problem, the empirical method is very dependent on the experience of technicians, belongs to a solution method with compact properties, and has low accuracy and no theoretical basis.
After the two side edges of the hyperboloid part are rounded and chamfered, the positions of the two side edges are determined by extending the intersection points of the side edges, and the intersection points are virtual intersection points. The conventional detection method is to use two square bars to be close to two sides of a part, take the extending intersection point of the two square bars as the length from the two sides of the part to the virtual intersection point, measure the distance between the extending intersection point and the side datum by using a vernier caliper, and determine the position relationship of the two sides of the part. However, the detection method is not only completed by two persons in a matched manner, but also is inconvenient to operate, the intersection point formed by the two straight rulers is difficult to control, the accurate size is difficult to find, the visual judgment of a technician is often relied on, and the measurement accuracy is not high.
Disclosure of Invention
The invention aims at overcoming the defects of the existing detection method, and provides a rapid detection method and an auxiliary detection tool for virtual sizes of double-tangential and rounding extension intersection points of two side edges, which are simple and convenient to detect, convenient to operate, high in detection efficiency and accurate in positioning.
The technical scheme adopted for solving the technical problems is as follows: the method for detecting virtual dimensions of extension intersection points of double-cutting and rounding at two sides is characterized in that firstly, according to the distance between two adjacent sides of a part 4 to be detected, an auxiliary detection tool consisting of a main scale 2 with measurement scales, a vernier outer measuring claw 5 sliding on the main scale 2 and an opening caliper fixed at the main scale end is manufactured, wherein the opening caliper with a finger ring 3 is fixed on the semicircular arc center of the main scale end by a positioning pin 7, and the axis of the positioning pin 7 is the intersection point of extension lines of inner closed positioning surfaces 8 of two caliper movable arm clamping claws 1 of the opening caliper; when the virtual size of the double-cutting and rounding extension intersection point of the two sides of the part to be detected 4 is detected, the opening calipers rotate around the positioning pins 7 according to the angle of the two sides of the part to be detected and are clamped on the double-cutting and rounding surfaces of the two sides of the part to be detected 4, the vernier outer measuring claw 5 is attached to the measuring reference edge of the part to be detected 4, the distance from the vertex of the opening angle of the inner side closing positioning surface 8 of the movable arm clamping claw 1 of the opening calipers to the measuring reference edge of the part to be detected 4 is measured, and the virtual size X of the double-cutting and rounding extension intersection point of the two sides of the part to be detected 4 can be obtained by reading the scale on the main scale.
Compared with the prior art, the invention has the following beneficial effects.
The detection is simple and convenient. According to the opening calipers for adjusting the opening angle according to the angle of the part to be detected, the positioning ruler can be moved to clamp the reference surface by leaning against two sides of the part to be detected, the position size of the virtual point on the main ruler is directly read, the detection is simple and convenient, and the problems that in the prior art, two persons are required to complete the measurement by using the vernier caliper to measure the distance between the intersection point of two extending sides of the part and the side reference, the operation is inconvenient, the human error is large and the operation is inconvenient are solved.
The detection efficiency is high, and the positioning is accurate. According to the invention, the opening caliper with the finger ring handle ring 3 is fixed on the semicircular arc center of the main ruler end by the locating pin 7, the axle center of the locating pin 7 is used as the intersection point of the extending lines of the inner closed locating surfaces 8 of the two caliper movable arm clamping jaws 1 of the opening caliper, the vernier outer measuring jaw 5 can transversely move according to the position length of the virtual point through the rapid locating of the inner two locating surfaces of the two caliper movable arm clamping jaws 1, the distance from the vertex of the opening angle of the inner closed locating surfaces 8 of the two caliper movable arm clamping jaws 1 of the opening caliper to the measuring reference edge of the part 4 to be detected can be rapidly and accurately found out by means of the auxiliary caliper, and the positioning is rapid and accurate, and the detection efficiency is very high. Solves the defects that most of the existing methods used at home and abroad rely on technical personnel to meet the requirements of the method, the accuracy is not high and theoretical foundation support is not available.
The application range is wide. The auxiliary detection tool can meet the auxiliary detection of virtual points of parts with different types and sizes, and the detection cost is saved. The method is particularly suitable for checking and controlling linear endpoints of extension virtual points of double-cut rounded parts, in particular to airplane joints and frame beam parts with rounded chamfers, and parts with double-cut adjacent intersection area structural characteristics.
Drawings
Fig. 1 is a front view of an auxiliary inspection tool according to the present invention.
Fig. 2 is a schematic view of the static structure of fig. 1.
Fig. 3 is a schematic view of a part under inspection with rounded virtual points.
In the figure: the movable arm clamping jaw of the caliper is 1, the main scale is 2, the handle ring of the finger ring is 3, the part to be detected is 4, the vernier outer measuring jaw is 5, the locking screw is 6, the positioning pin is 7, the positioning surface is closed at the inner side of the caliper, and the vernier is 9.
Detailed Description
See fig. 1. In the embodiment described below, according to the distance between the adjacent sides of the part 4 to be inspected, an auxiliary detecting tool is made up of a main scale 2 with measuring graduation, an outer measuring claw 5 of a vernier sliding on the main scale 2 and an opening caliper fixed on the main scale end, and the auxiliary detecting tool is composed of a scale body and a vernier capable of sliding on the scale body. The auxiliary detection tool mainly comprises a main scale 2, a vernier 9, a caliper movable arm claw 1 and a finger ring handle ring 3, and mainly comprises: the auxiliary detection tool comprises: the main scale 2 carved with the size scale and the vernier scale 9 sliding along the main scale 2, the vernier scale 9 and the sliding clamping foot are made into a whole to form a vernier outer measuring claw 5 sliding along the main scale 2, and a distance measuring section for detecting the double-cutting rounded angle extending intersection point of the two side edges of the part to be detected 4 to the virtual size X of the measuring reference edge is formed by intersecting the extending lines of the inner side closed positioning surfaces 8 of the two caliper movable arm clamping claws 1 with the scissor-shaped openings of the finger ring handle ring 3. The caliper movable arm claw 1 and the finger ring handle ring 3 which can freely rotate around the positioning pin 7 are arranged at the ruler end of the main ruler 2, the caliper movable arm claw 1 with the scissor-shaped opening of the finger ring handle ring (3) is fixed on the semicircular arc center of the ruler end of the main ruler by the positioning pin 7, the axle center of the positioning pin 7 is the intersection point of the extension lines of the inner side closing positioning surfaces 8 of the two caliper movable arm claws 1 of the opening caliper,
the semicircular arc circle center of the main ruler end is a detection specified measurement origin, and the detection specified measurement origin is arranged on an angular bisector of the opening angle of the inner side closed positioning surface 8 of the movable arm clamping jaw 1 of the two calipers. The caliper movable arm claw 1 and the finger ring handle ring 3 are fixed by the positioning pin 7, the caliper movable arm claw 1 and the finger ring handle ring 3 can rotate around the positioning pin 7, and the vernier 9 can slide left and right on the main scale 2. When the virtual size of the double-cutting and rounding extension intersection point of the two sides of the part to be detected 4 is detected, the opening calipers rotate around the positioning pins 7 according to the angle of the two sides of the part to be detected and are clamped on the double-cutting and rounding surfaces of the two sides of the part to be detected 4, the vernier outer measuring claw 5 is attached to the measuring reference edge of the part to be detected 4, the distance from the vertex of the opening angle of the inner side closing positioning surface 8 of the movable arm clamping claw 1 of the opening calipers to the measuring reference edge of the part to be detected 4 is measured, and the virtual size X of the double-cutting and rounding extension intersection point of the two sides of the part to be detected 4 can be obtained by reading the scale on the main scale.
See fig. 2 and 3. The main scale 2 is carved with scales with the interval of 1 mm. The scale body and the vernier 9 are provided with scales. The minimum graduation on the ruler body is 1mm, the vernier is provided with 10 small divided graduations, the total length is 9 mm, each graduation is 0.9 mm, and the difference between the minimum graduation on the main ruler and the graduation is 0.1 mm. When reading, firstly, the whole millimeter, namely the whole integer part taking millimeter as a unit, is read on the ruler body by taking the zero scale mark of the vernier as the standard. And then, looking at the number of scale marks on the vernier to be aligned with the scale marks of the ruler body, and taking the closest aligned line for reading. The vernier has n equal dividing scales, the total length of the dividing scales is equal to the total length of (n-1) dividing scales on the ruler body, if the minimum dividing scale length on the vernier is x and the minimum dividing scale length on the main ruler is y, nx= (n-1) y, x=y- (y/n), the difference between the minimum dividing scales of the main ruler and the vernier is deltax=y-x=y/n, and y/n is the precision of the vernier caliper, which determines the digit of the reading result. It can be seen from the formula that the improvement of the measuring accuracy of the vernier caliper consists in increasing the scale number on the vernier or in decreasing the minimum scale value on the main scale. Typically y is 1mm, n is 10, 20, 50, and their corresponding accuracies are 0.1,0.05 mm, 0.02 mm. The upper part of the cursor is provided with a locking screw 6 which can fix the cursor at any position on the ruler body. The inner side closing positioning surface 8 of the movable arm claw 1 of the caliper is aligned with the zero scale line of the main scale 2 when the outer measuring claw 5 of the vernier is attached. Before detection, the vernier outer measuring jaw 5 is tightly combined with the inner side closed positioning surface 8 of the caliper movable arm jaw 1, no obvious gap exists, and the vernier 9 and the zero position score line of the main scale 2 are aligned with each other. In the measuring process, the inner side closed positioning surface 8 of the movable arm claw 1 of the caliper and the vertical surface of the vernier outer measuring claw 5 are abutted against the surface of the part 4 to be detected, and the part cannot be inclined. Firstly, a ring 3 is used for opening a movable arm claw 1 of a caliper, an opening of the movable arm claw 1 of the caliper can be clamped into a part 4 to be detected freely, the part 4 to be detected is attached to an inner side closed positioning surface 8, then a vernier 9 is moved, an outer vernier claw 5 is enabled to contact the part to be detected by slight pressure, a tightening screw 6 is screwed, and the value of a virtual size X of a double-cutting and rounding extension intersection point of two side edges of the part 4 to be detected is read through a main ruler 2 and the vernier 9.
Claims (4)
1. A method for detecting virtual dimensions of extension intersection points of double-tangent and rounding at two sides is characterized in that firstly, a main scale (2) with measuring scales, a vernier outer measuring claw (5) sliding on the main scale (2) and an auxiliary detection tool consisting of an opening caliper fixed at the end of the main scale are manufactured according to the distance between two adjacent sides of a part to be detected (4), the total length of n equal dividing scales on the vernier is equal to the total length of n equal dividing scales on the main scale (n-1), if the minimum dividing length on the vernier is x, the minimum dividing length on the main scale is y, nx= (n-1) y, x=y- (y/n), the difference between the main scale and the vernier is Deltax=y-x=y/n, y/n is the accuracy of a vernier caliper, a reading result is determined, wherein, a caliper movable arm claw (1) and a finger ring (3) capable of freely rotating around a locating pin (7) are arranged at the scale end of the main scale (2), the caliper movable arm claw (1) and the finger ring (3) are provided with the opening caliper ring (7) which is fixed at the inner side of the main scale (2) along the locating pin (7) and the axis of the positioning pin (7) is a closed arc, the two semicircular clamping claw (7) extends along the axis center of the opening of the main scale (7) and extends integrally, the distance measuring section for detecting the double-cutting rounded corner extending intersection points of the two side edges of the part to be detected (4) to the virtual dimension X of the measuring reference edge is formed by the intersection points of the extending lines of the inner side closed positioning surfaces (8) of the two caliper movable arm clamping claws (1) with the scissor-shaped openings of the finger ring handle ring (3); when the virtual size of the extension intersection point of double-cutting and rounding of two sides of a part to be detected (4) is detected, the inner side closed positioning surface (8) of the movable clamp arm claw (1) and the vertical surface of the vernier outer measuring claw (5) are abutted against the surface of the part to be detected (4), the ring (3) is used for opening the movable clamp arm claw (1) to enable the opening of the movable clamp arm claw (1) to be clamped into the part to be detected (4), the part to be detected (4) is abutted against the inner side closed positioning surface (8), the opening clamp rotates around the positioning pin (7) according to the angle of the two sides of the part to be detected and is clamped on the double-cutting and rounding surface of the two sides of the part to be detected (4), the vernier outer measuring jaw (5) is abutted against the measuring reference edge of the part (4) to be detected, transversely moves according to the position length of the virtual point, rapidly measures the distance from the vertex of the opening angle of the inner side closing positioning surface 8 of the two caliper movable arm jaws (1) of the opening caliper to the measuring reference edge of the part (4) to be detected, rapidly and accurately finds out the virtual point by virtue of the auxiliary caliper, measures the distance from the vertex of the opening angle of the inner side closing positioning surface 8 of the two caliper movable arm jaws (1) of the opening caliper to the measuring reference edge of the part (4) to be detected, and obtains the value of the virtual dimension X of the double-cutting and rounding extension intersection point of the two side edges of the part (4) to be detected, the virtual size X of the double-cutting and rounding extension intersection point of the two side edges of the part to be detected (4) can be obtained by reading the scales on the main scale (2).
2. The method for detecting the virtual size of the extension intersection point of double-cutting and rounding of two side edges according to claim 1, wherein the method comprises the following steps: the auxiliary detection tool comprises: the vernier comprises a main scale (2) carved with size scales and a vernier (9) sliding along the main scale (2), wherein the vernier (9) and the sliding clamping foot are made into a whole to form a vernier outer measuring claw (5) sliding along the body of the main scale (2).
3. The method for detecting the virtual size of the extension intersection point of double-cutting and rounding of two side edges according to claim 1, wherein the method comprises the following steps: the circle center of the semicircular arc at the main ruler end is a detection specified measurement origin, and the detection specified measurement origin is arranged on an angular bisector of the opening angle of the inner closed positioning surface (8) of the movable arm clamping jaws (1) of the two calipers.
4. The method for detecting the virtual size of the extension intersection point of double-cutting and rounding of two side edges according to claim 1, wherein the method comprises the following steps: the movable clamping jaw (1) of the caliper is opened through the finger ring handle ring (3), the opening of the movable clamping jaw (1) of the caliper can be clamped into the part to be detected (4) freely, the part to be detected (4) is attached to the inner side closed positioning surface (8), then the vernier scale (9) is moved, the outer measuring jaw (5) of the vernier is lightly pressed to contact the part to be detected (4), the tightening screw (6) is screwed, and the value of the virtual size X of the intersection point of the double-cutting and rounding extension of the two sides of the part to be detected (4) is read out through the main scale (2) and the vernier scale (9).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710036437.4A CN106907967B (en) | 2017-01-18 | 2017-01-18 | Method for detecting virtual size of extension intersection point of double-cutting and rounding of two side edges |
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| CN201710036437.4A CN106907967B (en) | 2017-01-18 | 2017-01-18 | Method for detecting virtual size of extension intersection point of double-cutting and rounding of two side edges |
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| CN106907967A CN106907967A (en) | 2017-06-30 |
| CN106907967B true CN106907967B (en) | 2023-10-03 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108802748B (en) * | 2018-06-01 | 2020-09-22 | 湖南万安达集团昭阳智造有限公司 | Cutting distance measuring device |
| CN109001750B (en) * | 2018-06-01 | 2020-09-22 | 湖南德沅众创制造有限公司 | Auxiliary distance measuring device for cutting |
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| JP2012106330A (en) * | 2010-10-27 | 2012-06-07 | Takeda Kikai:Kk | Measuring instrument |
| CN203744883U (en) * | 2014-01-18 | 2014-07-30 | 成都飞机工业（集团）有限责任公司 | Chamfer length universal gauge |
| CN205245921U (en) * | 2015-12-11 | 2016-05-18 | 天润曲轴股份有限公司 | Measure slide caliper of part chamfer |
| CN205482655U (en) * | 2016-03-31 | 2016-08-17 | 合肥市远大轴承锻造有限公司 | A slide caliper for measuring chamfer |
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| JP2012106330A (en) * | 2010-10-27 | 2012-06-07 | Takeda Kikai:Kk | Measuring instrument |
| CN203744883U (en) * | 2014-01-18 | 2014-07-30 | 成都飞机工业（集团）有限责任公司 | Chamfer length universal gauge |
| CN205245921U (en) * | 2015-12-11 | 2016-05-18 | 天润曲轴股份有限公司 | Measure slide caliper of part chamfer |
| CN205482655U (en) * | 2016-03-31 | 2016-08-17 | 合肥市远大轴承锻造有限公司 | A slide caliper for measuring chamfer |
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