Small part inner cone angle detection device
By designing the inner cone angle detection device of small parts, using the linear contact conversion linear dimension measurement of dial meters and measuring blocks, the problem of detecting inner cone angle in large-scale production of small and medium-sized parts is solved, and high-precision and low-cost detection effects are achieved.
Patent Information
- Application Number
- CN202422156198.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-03
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-09-03
AI Technical Summary
The prior art is difficult to conduct high-precision detection of the inner cone angle of small parts in large-scale production, especially because the size of the inner cone surface contact effective surface is too small, resulting in difficulty in detection.
A small part inner cone angle detection device is designed, including a dial gauge, clamping spring, nut, measuring block, positioning pin and bracket. The measurement is carried out by contacting the measuring block with the part line and converting the angle to a linear dimension. The positioning pin is combined with the positioning pin to quickly determine the part position, avoiding offset, and reducing detection difficulty and cost.
It realizes accurate detection of the inner cone angle of small and medium-sized parts with high-precision and large-scale production, improves detection efficiency and accuracy, reduces detection costs, and is suitable for large-scale production.
Smart Images
Figure CN223138569U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of angle detection, and particularly relates to an inner cone angle detection device for small parts. Background Art
[0002] At present, the main methods for detecting the inner cone angle include coordinate measuring, three-dimensional imaging detection, high-precision curing agent detection, etc. However, for small parts with inner cone angles, due to the too small effective contact surface size of the inner cone surface, it is difficult to accurately measure using the above methods; although high-precision detection can be achieved using laser interference detection and profilometer detection, it is difficult to apply to mass production. Content of the Utility Model
[0003] The technical problem to be solved by the utility model is: how to perform high-precision detection on the inner cone angles of small parts during mass production.
[0004] To solve the above technical problem, the specific technical solution of the utility model is as follows:
[0005] An inner cone angle detection device for small parts, comprising a micrometer 1, a collet 3, a nut 4, a measuring block 5, a positioning pin 7, a base 8, and a bracket 9;
[0006] A reference plane for placing the part 6 is provided at the top of the base 8, and a positioning hole is provided on the reference plane. The positioning pin 7 is riveted in the positioning hole for positioning the part 6; the lower end of the bracket 9 is fixedly connected to the base 8, and there is a tapered hole at the upper end of the bracket 9. The collet 3 is arranged in the tapered hole, and the tapered hole at the upper end of the bracket 9 is concentric with the positioning hole of the base 8; the nut 4 is used to lock the collet 3.
[0007] The micrometer 1 is fixed in the collet 3; the measuring rod 2 is vertically fixed at the lower end of the micrometer 1; the bottom of the measuring block 5 is in the shape of a stepped shaft. The measuring block 5 is statically placed on the part 6, the bottom edge of the measuring block 5 is in line contact with the part 6, and the top surface of the measuring block 5 is in surface contact with the measuring rod 2.
[0008] Further, the bracket 9 is fixed to the top of the base 8 by screws 10.
[0009] Further, the measuring rod 2 can move up and down together with the measuring rod of the micrometer 1.
[0010] Further, the measuring block 5 is in the shape of a stepped shaft.
[0011] Further, the maximum outer diameter of the measuring block 5 matches the barrel diameter of the part 6.
[0012] Further, the bottom diameters of different measuring blocks 5 are different.
[0013] Further, the heights of different measuring blocks 5 are the same.
[0014] The utility model has the following advantages:
[0015] 1. The contact design between the measuring rod and the measuring block is a plane contact, ensuring synchronous wear of the contact surface; and according to the characteristics of the part, the measuring block avoids the influence of fillet interference on the measurement result, and is designed in the shape of a stepped shaft.
[0016] 2. The position of the part can be quickly determined through the positioning pin, improving the detection efficiency. At the same time, the part does not shift during the detection process, ensuring the detection accuracy.
[0017] 3. This dimension is measured according to the principle of converting the angular dimension into a linear dimension, reducing the detection difficulty and saving the detection cost.
[0018] 4. The device has a simple structure, high reliability, and low usage cost, and is suitable for mass production. Description of the Drawings
[0019] Figure 1 It is a schematic structural diagram of the small part internal taper angle detection device of the utility model;
[0020] Figure 2 It is a schematic structural diagram of the large measuring block;
[0021] Figure 3 It is a schematic structural diagram of the small measuring block;
[0022] Figure 4 It is a schematic structural diagram of the calibration block;
[0023] Figure 5 It is a schematic working diagram of the small part internal taper angle detection device of the utility model;
[0024] Figure 6 For Figure 5 The enlarged schematic diagram of part of the structure in;
[0025] Explanation of the marks in the figure: 1. Micrometer; 2. Measuring rod; 3. Clip spring; 4. Nut; 5. Measuring block; 6. Part; 7. Positioning pin; 8. Base; 9. Bracket; 10. Screw. Specific Embodiments
[0026] In order to better understand the purpose, structure and function of the utility model, the following further detailed description of the utility model is made with reference to the drawings.
[0027] As Figures 1-4 shown, the small part internal taper angle detection device of the utility model includes a micrometer 1, a measuring rod 2, a clip spring 3, a nut 4, a measuring block 5, a positioning pin 7, a base 8, a bracket 9, a screw 10, and a calibration block 11.
[0028] There is a reference plane on the base 8 for placing the part 6. There is a positioning hole on the reference plane of the base 8, and the positioning pin 7 is riveted in the positioning hole of the base 8 to determine the position of the part 6; the bracket 9 is fixed to the top of the base 8 by screws 10. There is a tapered hole at the upper end of the bracket 9 for placing the clamping spring 3. When installing the bracket 9, it should be ensured that the tapered hole at the upper end of the bracket 9 is concentric with the positioning hole of the base 8; the nut 4 is used to lock the clamping spring 3.
[0029] The dial indicator 1 is fixed on the bracket 9 through the clamping spring 3 and the nut 4; the measuring rod 2 is connected to the dial indicator 1 by threads. The diameter dimension of the measuring rod 2 should not be greater than the diameter dimension of the measuring rod of the dial indicator 1. The measuring rod 2 can move up and down together with the measuring rod of the dial indicator 1; the measuring block 5 for measuring the part 6 is in the shape of a stepped shaft. When measuring, the measuring block 5 is placed statically on the part 6, in line contact with the part 6 and in surface contact with the measuring rod 2.
[0030] The measuring block is in the shape of a stepped shaft, including a large measuring block 5-1 and a small measuring block 5-2. The diameters at the bottom ends of the large measuring block 5-1 and the small measuring block 5-2 are different.
[0031] The operation process and principle of this embodiment:
[0032] The design principle of this device is to convert the angular dimension into a linear dimension for measurement. According to the different tangent points of a large and a small measuring block on the conical surface, the height position dimensions at different tangent points can be obtained. According to the height difference between the two measuring blocks at different tangent points and the diameter dimensions of the measuring blocks, the angular value can be reflected.
[0033] The calculation is as follows:
[0034]
[0035] Where
[0036] That is θ∈{44.75°, 45.25°}
[0037] C: The difference in measurements of the same part using the large and small measuring blocks respectively
[0038] L: The height difference between the centers of the two measuring blocks
[0039] D: The diameter of the large measuring block
[0040] d: The diameter of the small measuring block
[0041] When using the device of the present utility model for measurement, first measure the actual sizes of the large and small measuring blocks, and calculate the range of the difference C according to the measured values of the large and small measuring blocks.
[0042] See Figures 5-6As shown, when performing the detection operation, first position the part on the base 8 through the positioning pin 7, and then place the large measuring block 5-1 inside the part. At this time, the large measuring block 5-1 is in line contact with the inner conical surface of the part. At the same time, use a micrometer to perform the first measurement and read the value on the micrometer. This value is the reference value C1. Then remove the large measuring block 5-1 and place the small measuring block 5-2 in the same way. Read the value C2 measured for the second time. Then calculate the difference value C. This value is the height value converted from the actually measured conical angle. Then compare the measured height difference with the theoretical calculated value range. If it is within the range, it is qualified.
[0043] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, for those skilled in the art, without departing from the principle of the present invention, several modifications and improvements can still be made, and these should also be regarded as falling within the protection scope of the present invention.
Claims
1. A small part inner cone angle detection device, characterized in that, It includes a dial indicator (1), a clamping spring (3), a nut (4), a measuring block (5), a positioning pin (7), a base (8), and a bracket (9); A reference plane for placing a part (6) is provided at the top of the base (8). Positioning holes are provided on the reference plane, and the positioning pin (7) is riveted in the positioning holes for positioning the part (6). The lower end of the bracket (9) is fixedly connected to the base (8). There is a tapered hole at the upper end of the bracket (9). The clamping spring (3) is arranged in the tapered hole. The tapered hole at the upper end of the bracket (9) is concentric with the positioning hole of the base (8). The nut (4) is used to lock the clamping spring (3); The dial indicator (1) is fixed in the clamping spring (3); the measuring rod (2) is vertically fixed at the lower end of the dial indicator (1); the bottom of the measuring block (5) is in the shape of a stepped shaft. The measuring block (5) is statically placed on the part (6). The bottom edge of the measuring block (5) is in line contact with the part (6), and the top surface of the measuring block (5) is in surface contact with the measuring rod (2).
2. The small part inner cone angle detection device according to claim 1, wherein The bracket (9) is fixed to the top of the base (8) by screws.
3. The small part inner cone angle detection device according to claim 1, characterized in that, The measuring rod can move up and down together with the dial indicator measuring rod.
4. The small part inner cone angle detection device according to claim 1, characterized in that The measuring block is in the shape of a stepped shaft.
5. The small part inner cone angle detection device according to claim 4, characterized in that The maximum outer diameter of the measuring block matches the cylinder diameter of the part.
6. The small part inner cone angle detection device according to claim 5, characterized in that The bottom diameters of different measuring blocks are different.
7. The small part inner cone angle detection device according to claim 6, characterized in that The heights of different measuring blocks are the same.