Detection tool and detection method for detecting point coordinates of inclined plane of part

Abstract

The invention belongs to the field of machining, and relates to a detection tool and a detection method for detecting point coordinates of an inclined plane of a part. The detection tool is of a circular ring structure, a circle of inclined opening is formed in the periphery of the opening side of the circular ring structure, and the angle of the inclined opening is matched with the angle A1 of the inclined face of a detected part. The measuring tool is simple in structure and high in measuring precision, the precision can reach 0.01 degree, the size which cannot be detected by a conventional measuring tool can be achieved, and the measuring tool can replace a three-coordinate measuring machine to detect specific parts. The use range is wide, parts of the type of structure can be detected, and the method is suitable for detecting large-batch products through the method.

Description

Technical Field

[0001] The present invention belongs to the field of machining, and relates to a detection tooling and a detection method for detecting the coordinates of an inclined plane point of a part. Background Art

[0002] In the field of machining, the detection accuracy of parts directly affects the manufacturing accuracy of parts. Accurate measurement methods can ensure high machining accuracy of products. Currently, the commonly used method for measuring the coordinate values of inclined plane points usually uses a coordinate measuring machine. As Figure 1 shown, conventional vernier calipers or height gauges cannot directly detect, the detection accuracy of angle gauges is low, and the visual observation error is large. While the coordinate measuring machine is expensive. The special tooling and measurement method involved in the present invention can achieve accurate measurement of the coordinates of inclined plane points, with simple operation and low cost. Summary of the Invention

[0003] Object of the Invention

[0004] The object of the present invention is to provide a new detection method to accurately measure dimensions that cannot be accurately detected by conventional measuring tools, as Figure 1 shown.

[0005] Technical Solution

[0006] A detection tooling for detecting the coordinates of an inclined plane point of a part, the detection tooling is of a circular ring structure. On one side of the opening of the circular ring structure, there is a circle of inclined openings around the periphery, and the angle of the inclined openings should match the inclined plane angle A1 of the part to be measured;

[0007] Further, the inclined openings should be quenched to ensure the wear resistance of the tooling, thereby improving the service life and stability during use;

[0008] Further, during measurement, there should be a gap between the inner surface of the circular ring structure and the top of the part, and the gap is 3 mm - 5 mm.

[0009] Further, the detection tooling is made of stainless steel material.

[0010] Further, when the diameter of the detection tooling > 100 mm, the flatness is less than 0.01 mm, when the diameter ≤ 100 mm, the flatness ≤ 0.005 mm; when the diameter ≤ 100 mm, the end face is ground and lapped, and the flatness of the end face can reach 0.005 mm. When the diameter > 100 mm, the requirement for the flatness of the end face of 0.005 mm is too high and the processing difficulty is great. The above requirements are the result of comprehensively considering the accuracy requirements and processing difficulty of the tooling;

[0011] Further, the angle A1 of the contact part between the detection tooling and the part to be measured should be consistent with the angle A of the part to be measured, and the deviation ≤ ±0.03°;

[0012] Further, for the part of the detection tooling in contact with the part to be measured, when the horizontal coordinate value is B, the deviation of the E value on both sides of the tooling shall not be greater than 0.01 mm;

[0013] A detection method for detecting the coordinates of the inclined plane points of a part, comprising:

[0014] Step 1: According to the part drawing, the angle of the hypotenuse of the part is known as A. One fixed coordinate point is given on the inclined plane, and the theoretical value of its horizontal coordinate is B. Measure the actual value of the vertical distance C of this point, as shown in Figure 1 ;

[0015] Step 2: The height dimension E of the detection tooling needs to be designed and calculated according to the drawing. The dimension of E needs to be calculated to avoid interference between the lower end of the detection tooling and the upper end of the part to be measured or too large a spacing. The spacing should be preferably between 3 and 5 mm; (write the formula)

[0016] Step 3: Place the detection tooling on the upper surface of the part to be measured, and measure the height values of two symmetric points on the detection tooling respectively. The error shall be ensured to be ≤ 0.01 mm;

[0017] Step 4: Detect the height dimension Y.

[0018] Step 5: The coordinates X1 and Y1 of point M at the bottom of the part are known, and the X coordinate of the detected point N is B.

[0019] By detecting the overall height Y of the part, and the height of the detection tooling is known as E, then the Y coordinate of point N is Y2 obtained by Y - E.

[0020] Step 6: Angle calculation. Let the angle be represented as A, tanA = (X1 - B) / (Y1 - Y2), and then calculate the angle A of the part as A = arctan(Y1 - Y2) / (X1 - B).

[0021] Further, if the error of the height values of the two stacked symmetric points on the detection tooling exceeds 0.01 mm, the detection tooling should be moved back and forth again to ensure that the detection tooling is placed parallel;

[0022] Step 7: Compare the measured angle with the angle on the drawing. If the measured angle is within the designed angle range of the design drawing, the part is qualified; if the measured angle exceeds the designed angle range of the design drawing, the part is unqualified;

[0023] Further, the contact length of the contact part between the detection tooling and the part to be measured shall be greater than 8 mm to ensure stable contact;

[0024] Further, in the fourth step, to detect the height dimension Y, a height gauge is used for detection.

[0025] The beneficial effects of this application are as follows:

[0026] The structure of the present invention is simple and the precision requirement is not particularly high. Therefore, the manufacturing difficulty is low and the manufacturing cost is not high. However, the measurement precision is high, up to 0.01°. It can realize the dimensions that cannot be detected by conventional measuring tools and can replace the coordinate measuring machine to detect specific parts. It has a wide range of applications and can detect parts of this type of structure. It is suitable for mass-produced products to be detected by this method.

[0027] This method is easy to operate, much higher in detection precision than an angle gauge, lower in cost and higher in efficiency than coordinate detection. Only need to install the tooling above the part, detect the overall height, and input it into the pre-set calculation formula to measure the actual angle of the part. The precision can reach 0.01°, close to the detection precision of the coordinate measuring machine and far higher than that of the angle gauge. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is the part drawing detected by the present invention;

[0029] Figure 2 is the tooling drawing for detection of the present invention;

[0030] Figure 3 is the schematic diagram of the detection process of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The present invention will be further described below in conjunction with embodiments. The following only describes some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present invention.

[0032] Figure 1 is the part drawing detected by the present invention, Figure 2 is the tooling drawing for detection of the present invention, Figure 3 is the schematic diagram of the detection process of the present invention. Referring to Figure 1 、 Figure 2 and Figure 3 , the investment casting solidification method provided by the present invention includes:

[0033] Step 1: Place the part to be detected on the detection platform, and require the flatness of the detection platform to meet high requirements. It is preferably a marble platform;

[0034] Step 2: According to Figure 3 , place the detection tooling above the part to be detected. After contact, move the detection tooling back and forth to ensure that the two are in full contact through the contact surface, so that the upper surface of the detection tooling and the detection platform can reach a high parallelism;

[0035] Step 3. Use a height gauge to measure the height of the upper surface of the inspection tooling from the inspection platform. During the inspection process, do not apply excessive pressing force to cause displacement between the inspection tooling and the inspected part;

[0036] Step 4. Measure the height on both sides of the part and compare the two height values. The error should not be greater than 0.01 mm;

[0037] Step 5. The horizontal coordinate value of this point is the same as the theoretical value, and the vertical coordinate value is the overall inspection height Y minus the vertical height E of the tooling.

[0038] Example 2

[0039] The known design theoretical angle of the part is 58.524°, and the tolerance is ±0.2°. The known height of the part is 50 mm. Design, manufacture, and inspect according to the gap of 3 - 5 mm between the top of the tooling and the part and the thickness of 4 - 6 mm of the top of the tooling itself. The known coordinates of point M are (70.031, 0), the known value of B is 54.371 mm, and the height value of the inspection tooling of E value is 33.919 mm. Inspect the diagonal twice, which are 61.136 mm and 61.142 mm respectively. Calculate the angles of the part: A1 = arctan(61.136 - 33.919) / (71.031 - 54.371) = arctan 27.217 / 16.660 = 58.528°; A2 = arctan(61.140 - 33.919) / (71.031 - 54.371) = arctan 27.221 / 16.660 = 58.532°. They respectively meet the design requirements of the drawing. Therefore, it is concluded that the angle of this part is qualified.

[0040] Example 3

[0041] An inspection method for inspecting the coordinates of the inclined plane point of a part, including:

[0042] Step 1. According to the part drawing, the known angle of the hypotenuse of the part is A. Give a fixed coordinate point on the inclined plane, the theoretical value of its horizontal coordinate is B, and measure the actual value of the vertical distance C of this point, see Figure 1 ;

[0043] Step 2. The height dimension E of the inspection tooling needs to be designed and calculated according to the drawing. The dimension of E needs to be calculated to avoid interference or excessive spacing between the lower end of the inspection tooling and the upper end of the part to be measured. The spacing should be preferably between 3 and 5 mm; (write the formula)

[0044] Step 3. Place the inspection tooling on the upper surface of the part to be measured and measure the height values of two symmetric points on the inspection tooling respectively. The error should be ensured to be ≤0.01 mm;

[0045] Step 4. Inspect the height dimension Y.

[0046] Step 5: Given the coordinates X1 and Y1 of point M at the bottom of the known part, and the X coordinate of the detected point N is B.

[0047] By detecting the overall height Y of the part, and the height of the detection tooling is known as E, then Y - E gives the Y coordinate of point N as Y2.

[0048] Step 6: Angle calculation. Let the set angle be represented by A, tanA = (X1 - B) / (Y1 - Y2), and then calculate the angle A of the part as A = arctan(Y1 - Y2) / (X1 - B).

[0049] In an embodiment of the present invention, if the height value error of the two stacked points on the detection tooling exceeds 0.01 mm, the detection tooling should be moved back and forth again to ensure that the detection tooling is placed parallel.

[0050] Step 7: Compare the measured angle with the angle on the drawing. If the measured angle is within the designed angle range of the design drawing, the part is qualified; if the measured angle exceeds the designed angle range of the design drawing, the part is unqualified.

[0051] In an embodiment of the present invention, the contact length of the contact part between the detection tooling and the part to be detected should be greater than 8 mm to ensure stable contact.

[0052] In an embodiment of the present invention, in Step 4, when detecting the height dimension Y, a height gauge is used for detection.

[0053] Those skilled in the art of this technology can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used here have the same meaning as the general understanding of those of ordinary skill in the field to which the present invention belongs. It should also be understood that terms defined in general dictionaries should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless defined as here. The specific embodiments described above have further elaborated on the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only the specific embodiments of the present invention and is not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A detection tooling for detecting the coordinates of the inclined plane points of parts, Characterized in that, The detection tooling is of an annular structure. On one side of the opening of the annular structure, a circle of inclined openings is provided around the periphery, and the angle of the inclined openings should match the inclined plane angle A1 of the part to be measured.

2. The detection tooling according to claim 1, Characterized in that, The inclined openings should be quenched to ensure the wear resistance of the tooling, thereby improving the service life and stability during use.

3. The detection tooling according to claim 2, Characterized in that, During measurement, there should be a gap between the inner surface of the annular structure and the top of the part, and the gap is 3mm - 5mm.

4. The detection tooling according to claim 3, Characterized in that, The detection tooling is made of stainless steel material.

5. The detection tooling according to claim 4, Characterized in that, When the diameter of the detection tooling > 100mm, the flatness is less than 0.01mm; when the diameter ≤ 100mm, the flatness ≤ 0.005mm; when the diameter ≤ 100mm, the end face is ground and lapped, and the flatness of the end face reaches 0.005mm. When the diameter > 100mm, the requirement for the flatness of the end face is high and the processing difficulty is great.

6. The detection tooling according to claim 5, Characterized in that, The angle A1 of the part of the detection tooling in contact with the part to be measured should be consistent with the angle A of the part to be measured, and the deviation ≤ ±0.03°.

7. The detection tooling according to claim 6, Characterized in that, For the part of the detection tooling in contact with the part to be measured, when the horizontal coordinate value is B, the deviation of the E values on both sides of the tooling is not greater than 0.01mm.

8. The detection method of the detection tooling according to any one of claims 1 - 7, Characterized in that, It includes the following steps: Step 1: According to the part drawing, the angle of the hypotenuse of the part is known as A, and a fixed coordinate point is given on the inclined plane. The theoretical value of its horizontal coordinate is B, and the actual value of the vertical distance C of this point is measured; Step 2: The height dimension E of the detection tooling needs to be designed and calculated according to the drawing. The dimension of E needs to be calculated to avoid interference or excessive spacing between the lower end of the detection tooling and the upper end of the part to be measured. The spacing should be preferably between 3 and 5mm; Step 3: Place the detection tooling on the upper surface of the part to be measured, and measure the height values of two symmetric points on the detection tooling respectively, and the error should be ensured to be ≤ 0.01mm; Step 4: Detect the height dimension Y; Step 5: The coordinates X1, Y1 of point M at the bottom of the part are known, and the X coordinate of the detected point N is B; By detecting the overall height Y of the part and the height of the detection tooling is known as E, then the Y coordinate of point N is Y2 obtained by Y - E; Step 6: Angle calculation. Let the set angle be represented by A, tanA = (X1 - B) / (Y1 - Y2), and then calculate the angle A of the part A = arctan(Y1 - Y2) / (X1 - B).

9. The detection method according to claim 8, Characterized in that, If the height value error of the two points stacked on the measurement and detection tooling exceeds 0.01 mm, the detection tooling should be moved back and forth again to ensure that the detection tooling is placed parallel; in step seven, compare the measured angle with the angle on the drawing. If the measured angle is within the designed angle range of the design drawing, the part is qualified; if the measured angle exceeds the designed angle range of the design drawing, the part is unqualified.

10. The detection method according to claim 9, characterized in that the contact length of the contact part between the detection tooling and the part to be detected should be greater than 8 mm to ensure stable contact; in step four, to detect the height dimension Y, a height gauge is used for detection.

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