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

Abstract

The utility model discloses a high-precision special measuring tool for detecting the radiuses of inner and outer arcs of a part, which comprises a base, a dial indicator is rotatably arranged on the base, and the distance between the rotation center of the dial indicator and the end part of a measuring head of the dial indicator is equal to the radius of a to-be-measured concave arc on the outer surface of the part. 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] This utility model 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 parts. Background Technology

[0002] For measuring the radius of a part's arc, methods such as radius gauges (R-gauges) or projectors are commonly used. When using an R-gauge, the measuring surface must be completely flush with the arc surface of the part; when there are no gaps, the arc radius is the data displayed on the R-gauge. While this method is simple, its accuracy is low. When using a projector, the part to be measured needs to be projected onto a two-dimensional plane. Using optical projection, the actual arc radius is obtained by comparing the part's surface contour with a standard circle. Although this method offers high measurement accuracy, it is significantly affected by the shape and size of the part, resulting in poor operability. Utility Model Content

[0003] Utility Model Purpose

[0004] To address the aforementioned technical problems of existing methods for detecting the radius of curvature of parts, this utility model provides a high-precision special measuring tool for detecting the inner and outer radii of curvature of parts.

[0005] Utility Model Technical Solution

[0006] A high-precision special measuring tool for detecting the inner and outer arc radii of a part includes a base, on which a dial indicator is rotatably mounted. The distance between the rotation center of the dial indicator and the end of the dial indicator probe 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. When the probe of the dial indicator rotates to the inner concave arc to be measured on the part, the probe of the dial indicator contacts the inner concave arc to be measured on the part.

[0007] Preferably, the base is also connected to an arc-shaped contact module. The part is rotatably mounted on the base. When the part rotates to the arc-shaped contact module, the part to be tested protrudes outward in an arc shape and contacts the arc surface on the arc-shaped contact module.

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

[0009] Preferably, the measuring rod of the dial indicator is clamped on the support base, and the support base is rotatably mounted on the base.

[0010] Preferably, the support base has a hole through which the measuring rod of the dial indicator passes, and the upper part of the support base is divided into two halves. The upper part of the support base is connected by tightening screws so that the measuring rod of the dial indicator is clamped on the support base.

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

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

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

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

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

[0016] The advantages of this utility model are: the measuring tool can quickly position and clamp the parts to be inspected, and has the characteristics of high measurement accuracy and simple operation, which greatly improves work efficiency. Attached Figure Description

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

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

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

[0020] Figure 4 This is an isometric schematic diagram 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 This is a schematic diagram of the structure of the part to be measured in the embodiment.

[0022] In the diagram: 1-base, 2-set screw, 3-positioning shaft, 4-pin, 5-bushing, 6-dial indicator, 7-adjustment block, 8-outer arc support module, 9-cylindrical pin, 10-screw, 11-support base, 12-bushing, 13-tightening screw, 14-small round nut, 15-bearing. Detailed Implementation

[0023] This utility model is achieved through the following technical solution.

[0024] In this embodiment, the measuring tool is applied to a V-shaped part (see...). Figure 5In the measurement of the upper arc, 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, and the outer arc is located at the end of the part. There is a through hole in the middle and at the other end of the part. This measuring tool can also be used to measure other arcs located on the outer shape of parts.

[0025] like Figure 1 , Figure 2 , Figure 3 As shown, a high-precision special measuring tool for detecting the inner and outer arc radii of a part includes a base 1, a dial indicator arc measuring device, an arc guide module 8, a part positioning device, and a dial indicator block 7.

[0026] In this embodiment, the dial indicator arc measuring device forms a 15° angle with the Y-axis of the entire measuring instrument, is press-fitted with the bearing 15, and is mounted on the base 1 via a small round nut 14, ensuring that the entire dial indicator arc measuring device can rotate flexibly around the center of R29±0.01. If used to measure arcs of other dimensions, the distance between the rotation center of the dial indicator and the end of the probe should be equal to the radius of the arc of the part to be measured.

[0027] The dial indicator arc measuring device includes a dial indicator 6, a support base 11, a bushing 12, and a tightening screw 13. The measuring rod of the dial indicator 6 passes through the upper part of the support base 11. The support base 11 has a hole for the measuring rod of the dial indicator to pass through, and the upper part of the support base 11 is divided into two halves. The tightening screw 13 connects the upper parts of the support base 11 to clamp the measuring rod of the dial indicator and prevent it from loosening. A small round nut 14 is connected to the bottom surface of the support base 11, and a bearing 15 is provided between the small round nut 14 and the mounting hole on the base 1.

[0028] A bushing 12 is provided between the support base 11 and the measuring rod of the dial indicator to prevent wear from causing the dial indicator 6 to fail to clamp.

[0029] The dial indicator block 7 is fixed to the base by cylindrical pins 9 and screws 10. The radius of the arc surface on the dial indicator block 7 is the same as the radius of the part to be measured by the dial indicator 6. When the dial indicator rotates to the arc surface of the dial indicator block 7, the end of the dial indicator head contacts the arc surface of the dial indicator block 7.

[0030] The arc-shaped support module 8 is fixed to the base 1 by cylindrical pins 9 and screws 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 dimensions of the radius of the arc to be measured, respectively.

[0031] In this embodiment, the part positioning device consists of a positioning shaft 3 and a pin 4. The part to be inspected is mounted on the base 1 via the positioning shaft 3 and the pin 4. The positioning shaft 3 passes through a hole in the middle of the part and is fixed to the base 1 by a set screw 2. The pin 4 passes through a hole at the other end of the part and is inserted into a pin mounting hole on the base 1. A bushing 5 is provided between the pin mounting hole and the pin 4. When inspecting the inner radius of the part, the pin 4 is inserted; when inspecting the outer radius of the part, the pin 4 is removed. Depending on the shape of the part, the part positioning device can be of other forms.

[0032] In practical applications, the working principle of this high-precision special measuring tool for detecting the inner and outer arc radii of parts is as follows:

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

[0034] 2. When inspecting the outer arc of a part, pull out pin 4, rotate the part to be inspected, and make the outer arc surface of the part contact 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 this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be used to limit the protection scope of this utility model. All equivalent transformations or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model. The technologies, shapes, and structures not described in detail in this utility model are all known technologies.

Claims

1. A high-precision special measuring tool for detecting the inner and outer arc radii of a part, characterized in that, The system includes a base (1), on which a dial indicator (6) is rotatably mounted. The distance between the rotation center of the dial indicator (6) and the end of the probe of the dial indicator (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). When the probe of the dial indicator (6) rotates to the concave arc to be measured on the part, the probe of the dial indicator (6) contacts the concave arc to be measured on the part. The base (1) is also connected to an arc-supporting module (8). The part is rotatably mounted on the base (1). When the part rotates to the arc-supporting module (8), the outward protruding arc to be measured on the part contacts the arc surface on the arc-supporting module (8). The bottom surface of the support base (11) is connected to a small round nut (14). The small round nut (14) is set in the mounting hole of the base (1). A bearing (15) is set between the small round nut (14) and the base (1) so that the support base (11) can rotate relative to the base (1).

2. The high-precision special measuring tool for detecting the inner and outer arc radii of a part as described in claim 1, characterized in that, It also includes a calibration block (7) for calibrating the dial indicator (6), the calibration block (7) is connected to the base (1), and the radius of the arc surface on the calibration block (7) is the radius of the concave arc of the part to be measured.

3. The high-precision special measuring tool for detecting the inner and outer arc radii of a part as described in claim 1, characterized in that, The measuring rod of the dial indicator (6) is clamped on the support base (11), which is rotatably mounted on the base (1).

4. The high-precision special measuring tool for detecting the inner and outer arc radii of a part as described in claim 3, characterized in that, The support base (11) has a hole through which the measuring rod of the dial indicator passes, and the upper part of the support base (11) is divided into two halves. The upper part of the support base (11) is connected by tightening the screw (13) so that the measuring rod of the dial indicator is clamped on the support base (11).

5. A high-precision special measuring tool for detecting the inner and outer arc radii of a part as described in claim 3, characterized in that, A bushing is provided between the measuring rod of the dial indicator (6) and the hole through which the measuring rod of the dial indicator passes.

6. The high-precision special measuring tool for detecting the inner and outer arc radii of a part as described in claim 1, characterized in that, The radii at both ends of the arc surface on the arc-shaped module (8) are the upper and lower limits of the radius of the concave arc to be measured on the part.

7. A high-precision special measuring tool for detecting the inner and outer arc radii of a part as described in claim 6, characterized in that, The arc-shaped module (8) is fixed to the base (1) by cylindrical pins and screws.

8. A high-precision special measuring tool for detecting the inner and outer arc radii of a part as described in claim 1, characterized in that, The watch block (7) is fixed to the base (1) by cylindrical pins and screws.

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