CN106066143A - Cambered surface defectoscopy card - Google Patents

Abstract

The invention relates to a detection tool for detecting the size of the arc surface defect, in particular to an arc surface defect measurement card for detecting the defect size of the nozzle of an arc extinguishing chamber. The curved surface defect measurement card includes a card body that can be bent and deformed to fit the curved surface to be tested. The card body is provided with a length scale for measuring the length of the defect, a series of width bars for comparing the width of the defect, and a series of width bars for comparing the width of the defect. At least one of a series of circles or a series of holes for the radial dimension of the defect. When using, according to the type of defect to be measured, compare the length scale, width bar series, circle series or round hole series of the card body with the defect, and force the card body to bend and deform the card body to fit the arc surface to be tested. The measurement of the defect size can be realized conveniently. Since the card body is a sheet structure, it is easy to extend into the inner hole, and there is no need to move the claws, which is conducive to high detection efficiency.

Description

Arc Surface Defect Measurement Card

technical field

The invention relates to a detection tool for detecting the size of the arc surface defect, in particular to an arc surface defect measurement card for detecting the defect size of the spout of an arc extinguishing chamber.

Background technique

The nozzle is the main component of the arc extinguishing device on the circuit breaker. It is generally a cylindrical structure with a varying thickness in the outer diameter, and an axial through hole is provided in the center. When the circuit breaker operates, the arc burns at the nozzle, and the airflow from the nozzle can dissipate heat from the arc column to extinguish the arc. Therefore, the spout is one of the core components of the arc extinguishing chamber device, and its quality is directly related to the performance of the arc extinguishing chamber device, especially the appearance quality, such as foreign matter or process problems in the nozzle molding When it is used, defects with a certain length, width or radial dimension will be produced on the inner and outer surfaces, which will affect the arc and air flow.

In the process of inspecting the appearance of the spout, if defects are found on the inner and outer surfaces, it is necessary to measure the external dimensions of the defect to determine the level of the defect. In the prior art, the measurement of defects is carried out with a vernier caliper. However, due to the irregular shape of the spout, most of the positions that need to be measured are arc surfaces, such as the outer surface, inner surface or rounded transition surface of the spout, and the vernier caliper The reading is the linear distance between the claws, so if the length, width or radial dimension of the defect deviates from the axial direction of the nozzle, the size measured by the vernier caliper is not the actual size of the defect, and the measured value is often smaller than the actual value, with low accuracy , It is easy to cause that the qualified product is actually a waste product or a foreign object discharge occurs during use. In addition, due to the limitation of the size of the nozzle, it is difficult for the vernier caliper to enter the axial through hole in the nozzle for measurement. Even if it can enter, it is difficult to align the jaws to the defect and read the value displayed by the vernier caliper due to the problem of sight. Inconvenient and low detection efficiency.

Contents of the invention

The object of the present invention is to provide a curved surface defect measurement card to solve the problems of inconvenient measurement and low detection efficiency of existing detection tools.

In order to achieve the above object, the technical solution adopted by the present invention is: arc surface defect measurement card, including a card body that can be bent and deformed to fit the arc surface to be tested, and the card body is provided with a length scale for measuring the length of the defect, At least one of a series of width bars for comparing defect widths, a series of circles or a series of circular holes for comparing radial dimensions of defects.

further:

The card body is made of transparent material.

The card body is made of transparent acrylic board.

The length scale is arranged at the edge of the card body.

The series of width bars are arranged in more than two columns, and the series of width bars in each column are arranged side by side or the arrangement directions are perpendicular to each other.

The width bar series is provided with two columns, and the two width bar series are respectively arranged at the edges of two adjacent sides of the card body.

The circle series is provided with two columns, which are hollow circle series and solid circle series respectively.

The series of hollow circles and the series of solid circles are arranged side by side, and a circle diameter value mark is provided between the two columns.

The card body is rectangular, and the four corners are rounded.

The thickness of the card body is 0.1mm-0.2mm.

The present invention adopts the above-mentioned technical scheme. The curved surface defect measurement card includes a card body that can be bent and deformed to fit the curved surface to be tested. The card body is provided with a length scale for measuring the length of the defect and a scale for comparing the width of the defect. At least one of a series of width bars, a series of circles for comparing the radial dimensions of defects, or a series of round holes. When using, according to the type of defect to be measured, compare the length scale, width bar series, circle series or round hole series of the card body with the defect, and force the card body to completely bend and deform the card body to fit the arc surface to be tested , can easily realize the measurement of defect size, because the card body is a sheet structure, so it is easy to extend into the inner hole, and there is no need to move the claws, which is conducive to improving the detection efficiency.

Furthermore, the card body is made of a transparent material, which can easily align the curved surface defect measurement card with the defect, making the operation more convenient.

Further, setting the length scale or width bar series at the edge of the card body can conveniently compare defects with the length scale or width bar series, and avoid interference of other parts of the measured object with the card body.

Further, the width bar series is divided into more than two rows and arranged in two or more columns, and the width bar series of each column are arranged side by side or arranged perpendicular to each other, which can reduce the size of the card body, reduce the force required for the card body to bend and deform, and make the card body It can better fit the curved surface and improve the measurement accuracy.

Further, the circle series has two columns, namely the solid circle series and the hollow circle series. The solid circle series is used for measuring the outer circle size of light-colored defects on dark-colored substrates, and the hollow circle series is used for dark-colored defects on light-colored substrates. Measurement of outer circle size.

Description of drawings

Fig. 1 is a structural schematic diagram of an embodiment of a curved surface defect measurement card in the present invention.

Fig. 2 is the cross-sectional view of measured spout;

Figure 3 is a schematic diagram when measuring the length of a defect (the nozzle surface is not shown in the figure);

Figure 4 is a schematic diagram when measuring the width of a defect (the nozzle surface is not shown in the figure);

Figure 5 is a schematic diagram of the measurement of the radial size of the defect (the nozzle surface is not shown in the figure).

The names corresponding to the reference marks in the figure are: 1-card body, 2-length scale, 3-first width bar series, 4-second width bar series, 5-solid circle series, 6-hollow circle series, 7- - circle diameter value identification, 8 - spout surface, 9 - defect.

detailed description

Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

An embodiment of the curved surface defect measurement card of the present invention is shown in Figures 1 to 5, which is a size measuring tool for detecting the size of the appearance defect of the spout, including a card body 1 and a measurement mark arranged on the card body 1. The card body 1 is a rectangle with rounded corners. It is made of soft transparent acrylic board with a thickness of 0.1mm~0.2mm, which is easy to bend and deform. The length is 90mm~100mm and the width is 50mm~60mm, which is easy to carry.

Observe from the orientation shown in Figure 1, the inside of the right part of the rectangular card body 1 is provided with a length scale 2 for measuring the length of the defect 9, the length scale 2 is the same type as the scale on a common ruler, and has a range of 0-80mm .

The inner side of the left part and the upper part of the rectangular card body 1 are provided with a series of width bars for comparing the width of defects, which are respectively the first width bar series 3 arranged on the inner side of the left part of the rectangular card body 1 and the first width bar series 3 arranged on the inner side of the rectangular card body 1. Second width bar series 4 on inner side of upper part. Each width bar series includes a plurality of width lines, each of which has a series of widths, which can be used as a basis for comparison of defect width values. For the convenience of measurement, the inner side of each width line is marked with the width value.

In the area surrounded by the length scale 2, the first width bar series 3, and the second width bar series 4, there are two series of circles for comparing the radial dimensions of the defect 9, which are hollow circle series 6 and solid circles respectively Series 5, hollow circle series 6 are hollow circles with a series of diameters, solid circle series 5 are solid dots with a series of diameters, hollow circle series 6 and solid circle series 5 are arranged side by side, and there are circles between the two columns The diameter value of the circle is identified by the diameter value of 7.

When the inside of the nozzle or the fillet transition surface is defective, and the vernier caliper cannot enter the measurement, you can use this curved surface defect measurement card for comparative measurement. If the size of the defect is within the specified tolerance range at this time, it means that the spout of this part is qualified, otherwise, it is unqualified because the defect is large. Of course, when there is a defect on the outer arc of the nozzle, the arc defect measurement card can also be used for comparative measurement, and the arc defect measurement card has a planar structure without external force, and can also be used to measure planar defects .

When in use, as shown in Figures 3 to 5, according to the type of defect to be detected, correspondingly press the positions of the length scale 2, the width bar series or the circle series on the arc surface defect measurement card to the corresponding position of the spout surface 8. On the defect, the arc surface defect measurement card is deformed to fit the arc surface to be tested, so that the defect length can be measured or the defect width or radial dimension can be compared. As shown in Figure 3, the defect length can be read directly through the length scale 2. As shown in Figure 4, the width bar series on the measurement card will be compared with the width of the black line defect on the nozzle. If the width of a certain width bar coincides with or is closest to the width of the black line, the defect can be judged The width of is the width value of the width bar. As shown in Figure 5, compare the hollow circle series 6 on the measurement card with the black spot defect on the nozzle, if a certain hollow circle series 6 can just include the black spot, it can be determined that the radial size of the defect is The diameter of the hollow circle.

The curved surface defect measurement card is accurate, fast and convenient during detection, and greatly improves the efficiency of defect determination. At the same time, the detection is not limited by the size of the nozzle, the operating environment and the placement of parts, and can adapt to various actual engineering conditions.

In the above embodiment, the card body 1 is made of transparent acrylic board, in other embodiments of the present invention, the card body 1 can also be made of other materials, such as polycarbonate, and the card body 1 can also be made of opaque material , but a transparent material is preferred to make the measurement more convenient. In the above embodiment, the card body 1 is provided with a length scale 2, a series of width bars and a series of circles. In other embodiments, only one of the length scale 2, the series of width bars and the series of circles may be provided on the card body 1. Or two, and the circle series can also be replaced by the round hole series, and the setting positions of the length scale 2 and the width bar series can also be adjusted. In addition, in other embodiments, the card body 1 can also be replaced with other shapes, such as triangle, semicircle, etc., while the rectangular card body 1 is an optional structure, which can also be omitted in other embodiments.

Claims (10)

1. cambered surface defectoscopy card, it is characterised in that: include flexible deformation with the card body fitted with cambered surface to be measured, described Card body be provided with the length scale for measuring defect length, for comparison defect width width bar series, for than To at least one of the radial dimension of circle of defect series or circular hole series.

Cambered surface defectoscopy card the most according to claim 1, it is characterised in that: described card body is by transparent material system Become.

Cambered surface defectoscopy card the most according to claim 2, it is characterised in that: described card body is by transparent acrylic Make.

4. according to the cambered surface defectoscopy card described in claim 1 or 2 or 3, it is characterised in that: described length scale is arranged on card The edge of sheet body.

5. according to the cambered surface defectoscopy card described in claim 1 or 2 or 3, it is characterised in that: described width bar series is divided into two The above arrangement of row, each column width bar series is arranged side by side or orientation is mutually perpendicular to.

Cambered surface defectoscopy card the most according to claim 5, it is characterised in that: described width bar series is provided with two row, and two Column width bar series is separately positioned on the edge of two adjacent side of card body.

7. according to the cambered surface defectoscopy card described in claim 1 or 2 or 3, it is characterised in that: described circle series is provided with two Row, respectively empty circles series and solid circles series.

Cambered surface defectoscopy card the most according to claim 7, it is characterised in that: described empty circles series and solid circles Series is set up in parallel, and is provided with circle diameter value mark between two row.

9. according to the cambered surface defectoscopy card described in claim 1 or 2 or 3, it is characterised in that: described card body is rectangular Shape, and corner is rounding.

10. according to the cambered surface defectoscopy card described in claim 1 or 2 or 3, it is characterised in that: the thickness of described card body For 0.1mm ~ 0.2mm.