CN104792246A - Workpiece fillet detecting method - Google Patents

Abstract

The invention relates to a method for detecting round corners of workpieces requiring high precision. It is characterized in that the rounded contour figure of the workpiece is measured with a tool, and the right-angled sides are extended according to the contour figure to form an intersection, and four values of X, Y, R small and R large are determined, where X is the point on the rounded corner to the vertical line Y is the maximum size from the point on the rounded corner to the horizontal line; according to the interval where the workpiece rounded corner is located, draw circles of different specifications. The circle is required to be tangent to the vertical line and the horizontal line, and the largest circle drawn The radius of R is large, and the area of the smallest circle drawn is R small. When the four values of X, Y, R small, and R large are all within the rounding tolerance, it is qualified. The invention can provide more detailed measurement data, and provide reliable information for workpiece correction or equipment debugging; the detection is accurate, and the fixture used for subsequent processing is effectively protected.

Description

A method for detecting rounded corners of workpieces

technical field

The invention relates to the technical field of workpiece detection, in particular to a method for detecting round corners of workpieces requiring high precision.

Background technique

After the rounded corners are processed, the size of the rounded corners has always been a difficult item to detect. If the rounded corners also have high-precision technical requirements, it will have a great impact on the subsequent processing quality of the workpiece. As shown in Figure 1, the existing detection scheme generally uses 3 points to determine a section of arc, and the size of the rounded corner is determined based on the size of the arc. Due to the different points selected each time, the measurement error is relatively large, especially when the rounding is irregular.

Contents of the invention

In view of the above problems, the present invention provides a workpiece rounding detection method, the purpose of which is to be able to be applied to the size detection after the workpiece rounding processing, to determine whether the workpiece meets the technical requirements, to ensure that the workpiece meets the subsequent processing conditions, and to protect the safety of subsequent tooling and fixtures. Safety.

For this reason, the present invention adopts the following technical scheme, a workpiece rounding detection method, which is characterized in that the rounding contour figure of the workpiece is measured with a tool, and the right-angled sides are extended to form intersections according to the contour figure, and the X, Y and R values are determined , R and four values, where X is the maximum size from the point on the rounded corner to the vertical line, and Y is the maximum size from the point on the rounded corner to the horizontal line; draw different specifications according to the interval of the rounded corner of the workpiece The circle is required to be tangent to the vertical line and the horizontal line. The radius of the largest circle drawn is larger than R, and the area of the smallest circle drawn is smaller than R. When the four values of X, Y, R are small, and R is large Within the round tolerance is acceptable.

The present invention utilizes a concept similar to shape tolerance (line profile degree) to determine the size of a section of circular arc at only 3 points for rounding, split it into 4 related data, and judge the rounding based on the 4 data results. The 4 measurement data are all within the rounding tolerance, which is qualified, and the smaller the difference between X and Y data, the better, and the smaller the difference between R small and R large data, the better.

The present invention has the following advantages:

1. It can provide more detailed measurement data and provide reliable information for workpiece correction or equipment debugging;

2. The detection is accurate and effectively protects the tooling and fixtures used in subsequent processing.

Description of drawings

Fig. 1 is the schematic diagram of existing detection method

Fig. 2 is a schematic diagram of determining X and Y values of workpiece rounding according to the present invention.

Fig. 3 is a schematic diagram of determining R small and R large according to the present invention for workpiece rounding.

detailed description

Below in conjunction with specific embodiment, further illustrate the present invention.

As shown in Figure 2, a workpiece rounding detection method, first use a profiler to measure the contour figure of the workpiece rounding, extend the right-angled sides to form intersections according to the contour figure, and determine X, Y, R small, and R large value, where X is the maximum dimension from a point on the round to a vertical line and Y is the maximum dimension from a point on the round to a horizontal line.

As shown in Figure 3, according to the interval where the workpiece is rounded, execute the drawing command to draw circles of different specifications according to the circle (tangent, tangent, radius). The circle is required to be tangent to the vertical line and the horizontal line, and the drawn The radius of the largest circle is R large, and the area of the smallest circle drawn is R small.

The present invention utilizes a concept similar to shape tolerance (line profile degree) to determine the size of a section of circular arc at only 3 points for rounding, split it into 4 related data, and judge the rounding based on the 4 data results. The 4 measurement data are all within the rounding tolerance, which is qualified, and the smaller the difference between X and Y data, the better, and the smaller the difference between R small and R large data, the better.

It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

Claims (1)

1. a workpiece rounding detection method, it is characterized in that the rounding contour pattern by contourgraph measuring workpieces, extending its right-angle side according to contour pattern is formed crossing, determine that X, Y, R are little, large four values of R, wherein X is the full-size of the point on rounding to perpendicular line, and Y is that point on rounding is to horizontal full-size; According to the interval at workpiece rounding place, draw the circle of different size, justify requirement and perpendicular line and horizontal line tangent, the maximum radius of a circle wherein drawn is that R is large, the smallest circle area drawn is that R is little, when X, Y, R are little, these four values are all namely qualified in rounding tolerance greatly for R.