Aerodynamic measuring head with external taper

Abstract

The utility model discloses a kind of outer cone pneumatic measuring heads, including measuring head main body and nozzle, the measuring head main body has the matching taper surface with the workpiece to be measured, the nozzle has first gas hole and second gas hole, the accommodating hole of accommodating first gas hole and second gas hole is set up on the measuring head main body taper surface, first gas hole and second gas hole have the taper surface matched with measuring head main body taper surface, and first gas hole and second gas hole are set from below to top;The beneficial effect that the utility model has is that: the device product structure is reasonable and ingenious, and the technical improvement is carried out to the problem of the existing measurement technology in the taper measurement convenient shortcoming or fundamentally unable to measure;The novel outer cone pneumatic measuring head is simple in structure, reasonable in design, convenient in measurement process, high in pneumatic measurement precision;Non-contact measurement method meets the requirement of taper detection.

Description

Technical Field

[0001] This utility model relates to the field of conical surface measurement technology, and in particular to an external conical surface pneumatic measuring head. Background Technology

[0002] Tapered surface fit is a common assembly method for mechanical products. Many products use tapered surface fit. In order to improve assembly accuracy and achieve more ideal mechanical force transmission, strict tapered tolerance is usually required. However, how to accurately measure the taper of the outer cone in the mating surface has always been a difficult problem.

[0003] In existing technologies, the four commonly used methods for taper measurement all have shortcomings: the coloring method relies on experience and the thickness of the color layer is difficult to control; the taper gauge is simple but has low accuracy; the sine gauge has high accuracy but is cumbersome to operate; and the coordinate measuring machine is versatile but has low efficiency and large errors. All of the above measurement methods suffer from significant human influence, insufficient accuracy, and low efficiency, making them unsuitable for mass production and high-precision requirements.

[0004] The patent application number "202411546335.3" discloses "a measuring tool and method for measuring the angle of the outer conical surface of a cone". However, in the measurement process, a dial indicator is required, and the workpiece to be measured needs to be rotated, which makes the measurement process cumbersome. Utility Model Content

[0005] The purpose of this invention is to provide a pneumatic measuring head for external conical surfaces, enabling rapid and accurate measurement of the external conical surfaces of workpieces.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A pneumatic measuring head with an external conical surface includes a measuring head body and a nozzle. The measuring head body has a conical surface that matches the workpiece to be measured. The nozzle has a first air outlet and a second air outlet. The conical surface of the measuring head body has a receiving hole for accommodating the first air outlet and the second air outlet. The first air outlet and the second air outlet have conical surfaces that match the conical surface of the measuring head body, and the first air outlet and the second air outlet are arranged from bottom to top.

[0008] Preferably, there are two nozzles, and two receiving holes are symmetrically opened on the conical surface of the probe body.

[0009] Preferably, the device further includes a base and an end cap for fixing the probe body.

[0010] Preferably, the base is provided with a first cylinder connector, and the nozzle is connected to a second cylinder connector, forming an air supply channel between the first cylinder connector, the second cylinder connector, and the nozzle.

[0011] Preferably, the nozzle is provided with a nozzle fixing hole for fixing.

[0012] Preferably, the base has a retractable handle on its side wall and leveling feet at its bottom.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. The conical surface of the workpiece to be tested is measured through a nozzle. The nozzle has two air outlets with different heights. Based on the different air output of the nozzle, it is possible to calculate whether the taper of the workpiece meets the requirements.

[0015] 2. A stable air supply is provided to the nozzle through the cylinder connector to ensure the reliability of the measurement process.

[0016] 3. The measuring device can be quickly moved and placed using handles and leveling feet, improving measurement efficiency. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present utility model;

[0018] Figure 2 This is a perspective view of the present invention from another angle;

[0019] Figure 3 A 3D view of the nozzle;

[0020] Figure 4 This is a top view of the present invention;

[0021] Figure 5 for Figure 4 Sectional view A-A;

[0022] Figure 6 for Figure 4 B-B sectional view;

[0023] Figure 7 This is a schematic diagram of the structure of the workpiece to be tested.

[0024] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Detailed Implementation

[0025] The present invention will now be further described with reference to the accompanying drawings.

[0026] Example 1

[0027] like Figure 1 , Figure 3 and Figure 7 As shown, an external conical pneumatic measuring head includes a measuring head body 3 and a nozzle 7. The measuring head body 3 has a conical surface 31 that matches the workpiece 9 to be measured. The nozzle 7 has a first air outlet 71 and a second air outlet 72. The measuring head body conical surface 31 has a receiving hole 32 for accommodating the first air outlet 71 and the second air outlet 72. The first air outlet 71 and the second air outlet 72 have conical surfaces that match the measuring head body conical surface 31. After the nozzle 7 is installed, the measuring head body conical surface 31 is ground so that the first air outlet 71 and the second air outlet 72 have a conical angle consistent with the conical surface of the workpiece 9 to be measured. The first air outlet 71 and the second air outlet 72 are arranged from bottom to top and are located on different diameters of the conical surface. After the workpiece 9 to be measured is placed into the measuring head body conical surface 31, the workpiece 9 will block the two air outlets, causing a change in the air output. By measuring the different air outputs, the taper of the workpiece 9 to be measured can be determined.

[0028] like Figure 7 The diagram shows a schematic of the workpiece 9 to be tested, which has a conical surface 91 that matches the conical surface 31 of the probe body. During the testing process, a standard workpiece (with the same structure as the workpiece 9, but whose conical surface has undergone multiple tests) is first placed into the probe body 3. The conical surface 91 of the workpiece blocks the air outlet of the nozzle, causing a change in the pressure output by the nozzle. A pressure sensor (not shown in the diagram) connected to the nozzle converts the pressure signal into an electrical signal, which is then converted into a digital signal and displayed on the screen (not shown in the diagram). This digital signal is recorded, and the measurement of the conical surface 91 of the standard workpiece is completed. Afterward, the standard workpiece is removed, and the workpiece 9 to be tested is placed into the probe body 3, yielding a digital signal for the workpiece 9. Before measurement, the limit difference between a qualified product and a standard part is determined based on product requirements. By comparing the difference between the digital signal of the workpiece 9 and the standard digital signal, it can be determined whether the workpiece 9 is qualified or unqualified. By sequentially placing the workpieces 9 to be tested, rapid and accurate measurement can be achieved.

[0029] The aforementioned measurement process, in which pressure signals are converted into electrical signals by pressure sensors and then into digital signals, is a conventional technology and will not be described in detail in this embodiment.

[0030] Two nozzles 7 are provided. Two receiving holes 32 are symmetrically opened on the conical surface 31 of the probe body. The symmetry between the two receiving holes 32 and the conical surface 31 of the probe body is within 0.01mm, thereby ensuring positioning accuracy. The two nozzles 7 are respectively installed in the two receiving holes 32.

[0031] like Figure 4 — Figure 6 As shown, the device also includes a base 1 and an end cap 2 for fixing the probe body 3.

[0032] A first cylinder connector 4 is provided on the base 1, and a second cylinder connector 8 is connected to the nozzle 7. An air supply channel is formed between the first cylinder connector 4, the second cylinder connector 8 and the nozzle 7. Each nozzle 7 has two air supply channels, corresponding to its first air outlet 71 and second air outlet 72 respectively.

[0033] The nozzle 7 is provided with a nozzle fixing hole 73 for fixation, and a corresponding opening is provided in the probe body 3. The nozzle 7 can be fixed to the probe body 3 by bolts. The installation gap is made less than 0.003mm through grinding and fitting.

[0034] like Figure 2 As shown, the base 1 has a retractable handle 5 on its side wall for easy handling. The bottom of the base 1 is equipped with leveling feet 6, which have anti-slip pads for convenient use on the production line.

[0035] In this embodiment, the nozzle 7 has two 2x4mm protrusions at its front end, and a rectangular air outlet is machined in the middle of each protrusion. The center distance between the two rectangular air outlets is 2.6mm, which are the first air outlet 71 and the second air outlet 72, respectively. The nozzle 7 has two M5 screw holes machined at its rear end, which are connected to the two rectangular air outlets at the front end, respectively, to facilitate the installation of the second cylinder connector 8.

[0036] This device features a rational and ingenious structure, addressing the shortcomings or even complete inability to measure taper using existing technologies. The novel external conical pneumatic measuring head boasts a simple and rational design, facilitating the measurement process and providing high pneumatic measurement accuracy. It meets the requirements for taper detection through a non-contact measurement method.

[0037] The above embodiments are not intended to limit the shape, material, structure, etc. of this utility model in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model shall fall within the protection scope of this utility model.

[0038] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of this utility model and to simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0039] If the terms "first" or "second" are used in this document to define the components, those skilled in the art should know that the use of "first" or "second" is merely for the convenience of describing this utility model and simplifying the description, and unless otherwise stated, the above terms have no special meaning.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A pneumatic measuring head with an external conical surface, comprising a measuring head body and a nozzle, characterized in that: The probe body has a conical surface that matches the workpiece to be measured. The nozzle has a first air outlet and a second air outlet. The conical surface of the probe body has a receiving hole for accommodating the first air outlet and the second air outlet. The first air outlet and the second air outlet have conical surfaces that match the conical surface of the probe body, and the first air outlet and the second air outlet are arranged from bottom to top.

2. The pneumatic measuring head with an external conical surface according to claim 1, characterized in that, The nozzle is provided in two parts, and two receiving holes are symmetrically opened on the conical surface of the probe body.

3. The pneumatic measuring head with an external conical surface according to claim 1, characterized in that, It also includes a base and end cap for fixing the probe body.

4. The pneumatic measuring head with an external conical surface according to claim 3, characterized in that, The base is provided with a first cylinder connector, and the nozzle is connected to a second cylinder connector, forming an air supply channel between the first cylinder connector, the second cylinder connector, and the nozzle.

5. The pneumatic measuring head with an external conical surface according to claim 1, characterized in that, The nozzle is provided with a nozzle fixing hole for fixing.

6. The pneumatic measuring head with an external conical surface according to claim 3, characterized in that, The base has a retractable handle on its side wall and leveling feet on its bottom.

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