High-precision special measuring tool for detecting radiuses of inner and outer arcs of part

Abstract

The high-precision special measuring tool comprises a base, a dial indicator is rotatably arranged on the base, the distance between the rotation center of the dial indicator and the end portion of a measuring head of the dial indicator is the radius of a to-be-measured inner concave arc on the outer surface of the part, and the part is fixed on the base. When the measuring head of the dial indicator rotates to the to-be-measured concave arc of the part, the measuring head of the dial indicator contacts with the to-be-measured concave arc of the part. The measuring tool can quickly position and clamp a part to be detected, has the characteristics of high measuring precision and simplicity and convenience in operation, and greatly improves the working efficiency.

Description

Technical Field

[0001] The invention belongs to the field of measurement technology, and in particular relates to a high-precision special measuring tool for detecting the inner and outer arc radii of a part. Background Art

[0002] The detection of the arc radius of parts is usually measured by radius gauge (R gauge) or projector. When using R gauge for detection, the measuring surface of R gauge needs to fit completely with the arc surface of the part. When it is determined that there is no gap, the arc radius of the part is the data displayed on the R gauge. Although this method is simple, the accuracy is not high. When using projector for detection, it is necessary to project the measured part onto a two-dimensional plane, and use the optical projection method to read the surface contour of the part and compare it with the standard circle to obtain the actual value of the arc radius. Although the measurement accuracy is high, it is greatly affected by the shape and size of the part and has poor operability. Summary of the invention

[0003] Purpose of the Invention

[0004] In order to solve the above technical problems of the existing method for detecting the arc radius of a part, the present invention provides a high-precision special measuring tool for detecting the inner and outer arc radii of a part.

[0005] Inventing technical solutions

[0006] A high-precision special measuring tool for detecting the radius of the inner and outer arcs of a part comprises a base, on which a micrometer is rotatably arranged, the distance between the rotation center of the micrometer and the end of the probe of the micrometer is the radius of the inner concave arc to be measured on the outer surface of the part, the part is fixed on the base, and when the probe of the micrometer rotates to the inner concave arc to be measured on the part, the probe of the micrometer contacts the inner concave arc to be measured on the part.

[0007] Preferably, the base is also connected to an arc support module, and the part is rotatably arranged on the base. When the part rotates to the arc support module, the outwardly protruding arc of the part to be tested contacts the arc surface on the arc support module.

[0008] Preferably, it also includes a calibration block for calibrating the micrometer, the calibration block is connected to the base, and the radius of the arc surface on the calibration block is the radius of the concave arc to be measured on the part.

[0009] Preferably, the measuring rod of the micrometer is clamped on the support seat, and the support seat is rotatably arranged on the base.

[0010] Preferably, the support seat has a hole for the measuring rod of the micrometer to pass through, and the upper part of the support seat is divided into two halves. The upper part of the support seat is connected by tightening the screws so that the measuring rod of the micrometer is clamped on the support seat.

[0011] Preferably, the bottom surface of the support seat is connected to a small round nut, the small round nut is arranged in the mounting hole of the base, and a bearing is arranged between the small round nut and the base so that the support seat can rotate relative to the base.

[0012] Preferably, a bushing is provided between the measuring rod of the micrometer and the hole through which the measuring rod of the micrometer passes.

[0013] Preferably, the radii at both ends of the arc surface on the arc support module are respectively the upper and lower limit dimensions of the radius of the concave arc to be measured on the part.

[0014] Preferably, the arc support module is fixed to the base by cylindrical pins and screws.

[0015] Preferably, the alignment block is fixed to the base by cylindrical pins and screws.

[0016] The advantages of the present invention are as follows: the measuring tool can quickly locate and clamp the parts to be tested, has the characteristics of high measuring accuracy and simple operation, and greatly improves the work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention is a structural schematic diagram of a high-precision special measuring tool for detecting the inner and outer arc radii of a part.

[0018] Figure 2 for Figure 1 AA section view.

[0019] Figure 3 for Figure 1 BB cross-sectional view.

[0020] Figure 4 The figure is a schematic isometric view of a high-precision special measuring tool for detecting the inner and outer arc radii of a part according to the present invention.

[0021] Figure 5 Schematic diagram of the structure of the parts to be measured in the embodiment.

[0022] In the figure: 1-base, 2-setting screw, 3-positioning shaft, 4-pin, 5-bushing, 6-micrometer, 7-meter block, 8-external arc support module, 9-cylindrical pin, 10-screw, 11-support seat, 12-bushing, 13-tightening screw, 14-small round nut, 15-bearing. DETAILED DESCRIPTION

[0023] The present invention is achieved through the following technical solutions.

[0024] In this embodiment, the measuring tool is applied to a V-shaped part (see Figure 5) In the measurement of arcs on the part, the two arcs to be measured are located at one end of the part, the inner arc is located on the side of the part, the outer arc is located at the end of the part, and there is a through hole in the middle and the other end of the part. This gauge can also be used to measure other arcs located on the exterior of the part.

[0025] like Figure 1 , Figure 2 , Figure 3 As shown, a high-precision special measuring tool for detecting the inner and outer arc radius of a part comprises a base 1, a micrometer arc measuring device, an arc support module 8, a part positioning device and a table block 7.

[0026] The micrometer arc measuring device in this embodiment is at an angle of 15° with the Y axis of the entire measuring tool, and is then press-fitted with the bearing 15 and mounted on the base 1 through the small round nut 14, ensuring that the entire micrometer arc measuring device can flexibly rotate around the center of the circle R29±0.01. If it is used to measure arcs of other sizes, the distance between the rotation center of the micrometer and the end of the probe is the arc radius of the part to be measured.

[0027] The micrometer arc measuring device includes a micrometer 6, a support seat 11, a bushing 12, and a tightening screw 13; the measuring rod of the micrometer 6 passes through the upper part of the support seat 11, and the support seat 11 has a hole for the measuring rod of the micrometer to pass through. The upper part of the support seat 11 is connected with the tightening screw 13 to clamp the measuring rod of the micrometer to prevent it from loosening. The bottom surface of the support seat 11 is connected with a small round nut 14, and a bearing 15 is arranged between the small round nut 14 and the mounting hole on the base 1.

[0028] A bushing 12 is provided between the support seat 11 and the measuring rod of the micrometer to prevent the micrometer 6 from being unable to be clamped due to wear.

[0029] The counter block 7 is fixed on the base by a cylindrical pin 9 and a screw 10. The radius of the arc surface on the counter block 7 is the same as the radius of the part to be measured by the micrometer 6. When the micrometer rotates to the arc surface of the counter block 7, the end of the micrometer head contacts the arc surface of the counter block 7.

[0030] The arc support module 8 is fixed on the base 1 by a cylindrical pin 9 and a screw 10. The radius of the arc surface on the arc support module 8 is the same as the radius of the arc to be measured on the part. In this embodiment, the radius of the arc surface on the arc support module 8 is the same as the radius of the outer arc of the part. When the part rotates around the through hole in the middle to the arc support module 8, the outer arc and the arc surface on the arc support module 8 need to match. Preferably, the radii at both ends of the arc surface on the arc support module 8 are the upper and lower limit sizes of the radius of the arc to be measured, respectively.

[0031] The part positioning device described in this embodiment is composed of a positioning shaft 3 and a latch 4. The detected part is installed on the base 1 through the positioning shaft 3 and the latch 4, wherein the positioning shaft 3 passes through the hole in the middle of the part, and the positioning shaft 3 is fixed on the base 1 through the set screw 2. The latch 4 passes through the hole at the other end of the part and is inserted into the latch installation hole on the base 1. A bushing 5 is provided between the latch installation hole and the latch 4. When detecting the inner arc radius of the part, the latch 4 is inserted, and when detecting the outer arc radius of the part, the latch 4 is pulled out. Depending on the shape of the part, the part positioning device can be in other forms.

[0032] In actual use, a high-precision special measuring tool for detecting the inner and outer arc radius of a part is used, and its working principle is as follows:

[0033] 1. When inspecting the inner arc of a part, first calibrate the micrometer 6 with the alignment block 7, that is, adjust the measuring head of the micrometer 6, and place it close to the arc surface of the alignment block 7, rotate the dial so that the zero position of the dial coincides with the pointer (i.e., return to zero), and then install the part to be inspected. After the part is firmly installed, rotate the measuring head of the micrometer 6. When it contacts the inner arc surface of the part, observe the deflection of the micrometer 6 pointer to detect whether the radius accuracy of the inner arc of the part meets the technical requirements.

[0034] 2. When testing the outer arc of a part, pull out the latch 4 and rotate the part to be tested so that the outer arc surface of the part contacts the module 8. If the T-end passes and the Z-end stops, it meets the technical requirements.

[0035] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable technicians familiar with the technical field to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent transformation or modification made according to the spirit and essence of the present invention should be included in the protection scope of the present invention. The technology, shape, and structure parts not described in detail in the present invention are all well-known technologies.

Claims

1. A high-precision special measuring tool for detecting the inner and outer arc radius of parts, characterized in that: The invention comprises a base (1), on which a micrometer (6) is rotatably arranged, the distance between the rotation center of the micrometer (6) and the end of the probe of the micrometer (6) is the radius of the concave arc to be measured on the outer surface of the part, the part is fixed on the base (1), and when the probe of the micrometer (6) rotates to the concave arc to be measured on the part, the probe of the micrometer (6) contacts the concave arc to be measured on the part.

2. A high-precision special measuring tool for detecting the inner and outer arc radius of a part as claimed in claim 1, characterized in that: The base (1) is also connected to an arc support module (8), and the part is rotatably arranged on the base (1). When the part rotates to the arc support module (8), the outwardly protruding arc of the part to be tested contacts the arc surface on the arc support module (8).

3. A high-precision special measuring tool for detecting the inner and outer arc radius of a part as claimed in claim 2, characterized in that: It also comprises a dial gauge block (7) for calibrating the micrometer (6); the dial gauge block (7) is connected to the base (1); the radius of the arc surface on the dial gauge block (7) is the radius of the concave arc to be measured on the part.

4. A high-precision special measuring tool for detecting the inner and outer arc radius of a part as claimed in claim 1, characterized in that: The measuring rod of the micrometer (6) is clamped on the support seat (11), and the support seat (11) is rotatably arranged on the base (1).

5. A high-precision special measuring tool for detecting the inner and outer arc radius of a part as claimed in claim 4, characterized in that: The support seat (11) is provided with a hole for the measuring rod of the micrometer to pass through, and the upper part of the support seat (11) is divided into two halves. The upper part of the support seat (11) is connected by tightening the screw (13) so that the measuring rod of the micrometer is clamped on the support seat (11).

6. A high-precision special measuring tool for detecting the inner and outer arc radius of a part as claimed in claim 4, characterized in that: The bottom surface of the support seat (11) is connected to a small round nut (14), which is arranged in a mounting hole of the base (1), and a bearing (15) is arranged between the small round nut (14) and the base (1) so that the support seat (11) can rotate relative to the base (1).

7. A high-precision special measuring tool for detecting the inner and outer arc radius of a part as claimed in claim 5, characterized in that: A bushing is arranged between the measuring rod of the micrometer (6) and the hole through which the measuring rod of the micrometer passes.

8. A high-precision special measuring tool for detecting the inner and outer arc radius of a part as claimed in claim 2, characterized in that: The radii at both ends of the arc surface on the arc support module (8) are respectively the upper and lower limit sizes of the radius of the concave arc to be measured of the part.

9. A high-precision special measuring tool for detecting the inner and outer arc radius of a part as claimed in claim 2, characterized in that: The arc support module (8) is fixed on the base (1) by means of cylindrical pins and screws.

10. A high-precision special measuring tool for detecting the inner and outer arc radius of a part as claimed in claim 3, characterized in that: The meter block (7) is fixed on the base (1) by means of cylindrical pins and screws.

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