RU2013104776A - METHOD FOR ASSESSING QUALITY OF WELDED SURFACE - Google Patents

Abstract

1. A method for evaluating the quality of the surface of a weld, including measuring the geometric dimensions of the weld with a template and comparing them with the sizes established by regulatory and technical documents, characterized in that the cross-sectional areas of the weld are calculated from the results of measuring the geometric dimensions of the weld, according to the sizes established by the normative -technical documents, calculate the shape of the standard weld, the cross-sectional area of the standard weld, calculate the quality assessment of the surface of the weld according to the formula: where Q - weld quality index; N = L / dL + 1 - the number of measured weld sections, with a measurement step dL greater than or equal to 0.01 mm; L - length of the weld; j - current value of the measured weld section; - absolute deviation area of the jth section of the weld from the area of the standard ;; B is the width of the measurement, the values of B are in the range from 1.1e to 10e; e is the width of the weld, set by normative and technical documents; dx from 0.01 mm to 2 mm; Z, x - coordinates of the curve in the coordinate system Z0X; Z (x) is the curve defining the shape of the weld standard; S is the area of the standard. 2. The method according to claim 1, characterized in that the shape of the standard is calculated according to the dimensions established by regulatory technical documents according to the formula where Z = Z (x) - the curve, for given values, e, g, φ determines the shape of the standard Z (x); - capillary the constant of the molten weld metal; g - the height of the weld, set by normative and technical documents; φ - the angle between the plane perpendicular to the axis of the weld in the coordinate system Z0X and the horizon line; R - radius of curvature of the curve

Claims (2)

1. A method for evaluating the quality of the surface of a weld, including measuring the geometric dimensions of the weld with a template and comparing them with the sizes established by regulatory and technical documents, characterized in that the cross-sectional areas of the weld are calculated from the results of measuring the geometric dimensions of the weld, according to the sizes established by the normative - technical documents, calculate the shape of the standard weld, the cross-sectional area of the standard weld, calculate the quality assessment of the surface of the weld according to the formula: $$Q=\frac{\mathrm{one\; hundred}}{N}{\displaystyle \sum _{j=\mathrm{one}}^N\left(\mathrm{one}-\frac{S_j^{\mathrm{about}t\mathrm{to}l}}{S^E}\right)}$$

where Q is the quality index of the weld; N = L / dL + 1 - the number of measured weld sections, with a measurement step of dL more than or equal to 0.01 mm; L is the length of the weld; j is the current value of the measured cross section of the weld; $${\text{S}}_{\text{j}}^{\text{OFF}}$$

- absolute deviation of the area of the jth section of the weld from the area of the standard; $$S_j^{\mathrm{ABOUT}T\mathrm{TO}L}={\displaystyle \underset{0}{\overset{B}{\int }}|\; |\; |Z_j^F\left(x\right)-Z^E\left(x\right)|\; |\; |}dx$$

; B is the width of the measurement, the values of B are in the range from 1.1 e to 10 e; e - the width of the weld, is established by regulatory and technical documents; $${\text{Z}}_{\text{j}}^{\text{F}}\text{(x)}$$

- measured values of the coordinates of the surface of the weld with a step dx from 0.01 mm to 2 mm; Z, x are the coordinates of the curve in the coordinate system Z0X; Z ^E (x) - curve defining the shape of the standard of the weld; S ^E - the area of the standard. 2. The method according to claim 1, characterized in that the shape of the standard is calculated according to the dimensions established by regulatory technical documents according to the formula $$\frac{\text{Z "}\left(\text{x}\right)}{{\left(\text{one}+{\left(\text{Z '}\left(\text{x}\right)\right)}^{\text{2}}\right)}^{\frac{\text{3}}{\text{2}}}}-\frac{\text{Sin}\varphi }{a_{\text{K}}^{\text{2}}}\text{x}-\frac{\text{Cos}\varphi }{a_{\text{K}}^{\text{2}}}\text{Z}\left(\text{x}\right)+\frac{\text{one}}{{\text{R}}_{\text{0}}}=\text{0}$$

where Z = Z (x) is the curve, for given values of a _k , e, g, φ determines the shape of the standard Z ^E (x); and _k is the capillary constant of the molten metal of the weld; g is the height of the weld, set by regulatory and technical documents; φ is the angle between the plane perpendicular to the axis of the weld in the coordinate system Z0X and the horizon line; R ₀ is the radius of curvature of the curve Z = Z (x) at x equal to 0; by integrating the curve Z ^E (x) in the range of values from x greater than or equal to 0 to x less than or equal to e calculate the area of the standard: $$S^E={\displaystyle \underset{0}{\overset{e}{\int }}{Z}^E\left(x\right)}dx$$