Height indicator measuring head and height indicator

Abstract

The utility model relates to the field of optical device detection. The utility model discloses an altimeter measuring head and an altimeter wherein the altimeter measuring head comprises a clamping rod and a measuring head, the clamping rod is connected with the altimeter, and the measuring head is used for measuring the aperture of a workpiece to be measured; the measuring head and the clamping rod are integrally formed; the measuring head is a cone, and the reading multiplying power of the measuring head is a tangent function value of the taper of the measuring head; the measuring head comprises a top plane, and the top plane is arranged at the small head end of the measuring head. The altimeter measuring head is matched with the altimeter, the aperture of the workpiece to be measured can be obtained according to the depth measurement value of the measuring head and the reading multiplying power of the measuring head, the taper hole size of the workpiece to be measured can be rapidly and accurately obtained, and the qualified rate of the workpiece to be measured is improved.

Description

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 202410968541.7, filed on July 19, 2024, entitled "A height measuring probe, a height measuring instrument and a measuring method thereof", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This utility model relates to the field of optical device testing, and in particular to a height measuring probe and a height measuring instrument. Background Technology

[0004] Optical instruments such as low-light observation mirrors and low-light aiming mirrors generally consist of three main modules: an objective lens for acquiring imaging information, a module for digitizing the image, and an eyepiece for observing the image. To ensure the necessary effective light enters the objective lens, the structural design of the objective and eyepiece incorporates many conical geometric shapes to ensure optical axis consistency, requiring high precision in the geometric dimensions of the components.

[0005] Existing parts such as spacers and lens barrels often have geometric shapes containing tapered holes. These tapered holes require tolerances of IT8 or IT9, demanding high dimensional accuracy. Current measuring tools cannot accurately measure these holes, and measurement accuracy directly impacts product yield. Therefore, finding a device capable of rapidly and accurately measuring the dimensions of tapered holes in spacers and lens barrels is a pressing technical problem. Utility Model Content

[0006] In view of this, the present invention provides a height measuring probe and a height measuring instrument.

[0007] Specifically, the following technical solutions are included:

[0008] Firstly, a height measuring instrument probe is provided, comprising:

[0009] A clamping rod and a measuring head are provided, wherein the clamping rod is connected to a height measuring instrument, and the measuring head is used to measure the hole diameter of the workpiece to be measured; the measuring head and the clamping rod are integrally formed.

[0010] The measuring head is a cone, and the reading multiplier of the measuring head is the tangent function value of the taper of the measuring head.

[0011] Preferably, the multiplier of the measuring head reading is a positive integer.

[0012] Preferably, the measuring head has a reading magnification of 2.

[0013] Preferably, the measuring head includes a top plane, which is disposed at the small end of the measuring head.

[0014] Preferably, the diameter of the top plane is a first value, and the measuring head is used to measure the workpiece to be measured with a hole diameter of 4-19mm.

[0015] Preferably, the diameter of the top plane is a second value, and the measuring head is used to measure the workpiece to be measured with a hole diameter of 17-39mm.

[0016] Preferably, the diameter of the top plane is a third value, and the measuring head is used to measure the workpiece to be measured with a hole diameter of 37-51mm.

[0017] Preferably, the measuring head and the clamping rod are integrally formed;

[0018] Both the measuring head and the clamping rod are made of copper.

[0019] Secondly, a height measuring instrument is provided, which is equipped with a height measuring instrument probe as described in the first aspect.

[0020] The beneficial effects of the technical solution provided by this utility model include at least the following:

[0021] The measuring head of this utility model works in conjunction with the measuring head. Based on the depth measurement value and the reading magnification of the measuring head, the hole diameter of the workpiece to be measured can be obtained. This allows for the rapid and accurate determination of the conical hole size of the workpiece, thereby improving the pass rate of the workpiece. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of a height measuring instrument for measuring a workpiece according to an embodiment of the present invention;

[0024] Figure 2 This is another structural schematic diagram of a height measuring instrument for measuring a workpiece according to one embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the structure of a height measuring probe with a top plane of 2mm according to an embodiment of the present invention.

[0026] Figure 4 This is another structural schematic diagram of a height measuring probe with a top plane of 2mm according to an embodiment of the present invention;

[0027] Figure 5This is a schematic diagram of the structure of a height measuring probe with a top plane of 15mm according to an embodiment of the present invention.

[0028] Figure 6 This is another structural schematic diagram of a height measuring probe with a top plane of 15mm according to an embodiment of the present invention;

[0029] Figure 7 This is a schematic diagram of the structure of a height measuring probe with a top plane of 35mm according to an embodiment of the present invention.

[0030] Figure 8 This is another structural schematic diagram of a height measuring probe with a top plane of 35mm, according to one embodiment of the present invention.

[0031] The reference numerals in the figure are respectively:

[0032] 1-Clamping rod; 2-Measuring head; 21-Top plane; 3-Height gauge; 4-Workpiece to be measured.

[0033] The accompanying drawings have illustrated specific embodiments of the present invention, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art through reference to specific embodiments. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0035] Before further describing the embodiments of this utility model in detail, the directional terms involved in the embodiments of this utility model, such as "upper part," "lower part," and "side part," are used to refer to... Figure 1 The orientation shown is a reference and does not limit the scope of protection of this utility model.

[0036] To make the technical solution and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0037] like Figures 1 to 8As shown, this embodiment provides a height measuring probe, including: a clamping rod 1 and a measuring head 2. The clamping rod 1 is connected to the height measuring instrument 3. The measuring head 2 is used to measure the hole diameter of the workpiece 4 to be measured. The measuring head 2 is a cone. The hole radius of the workpiece 4 to be measured is calculated based on the depth measurement value of the measuring head 2 and the reading magnification of the measuring head 2, and then the hole diameter of the workpiece 4 to be measured is calculated. The reading magnification of the measuring head 2 is the tangent function value of the taper of the measuring head 2.

[0038] Specifically, such as Figure 2 As shown, the taper angle of the probe is α, the radius of the workpiece 4 to be measured is R, and it is assumed that the tip of the small end of the measuring head 2 (e.g.) Figure 2 The depth of the measuring head 2 (intersection of dashed lines) inserted into the tapered hole of the workpiece 4 is measured as H. The reading magnification of the measuring head 2 is σ, which is calculated according to the following formula:

[0039]

[0040] The depth measurement value H can be read by the measuring instrument. The taper angle α of the probe is a physical property of the measuring head 2 and is a known quantity. Therefore, the hole radius and hole diameter of the workpiece 4 to be measured can be obtained according to the depth measurement value H of the measuring head 2 and the reading magnification α of the measuring head 2.

[0041] The radius of the hole in workpiece 4 to be tested is calculated using the following formula:

[0042] R = H × tanα

[0043] The diameter of the hole in workpiece 4 to be tested is calculated using the following formula:

[0044] D = 2 × H × tanα

[0045] The height measuring instrument 3 of this utility model works in conjunction with the measuring head 2. Based on the depth measurement value of the measuring head 2 and the reading multiplier of the measuring head 2, the hole radius and hole diameter of the workpiece 4 to be measured can be calculated. This allows for the rapid and accurate acquisition of the tapered hole size of the workpiece 4 to be measured, thereby improving the pass rate of the workpiece 4 to be measured.

[0046] The measuring instrument probe in this embodiment can measure not only the size of a conical hole, but also the size of a cylindrical hole.

[0047] Preferably, the reading multiplier of the measuring head 2 is a positive integer. For example, 1, 2, 3, etc.

[0048] Preferably, the reading magnification of the measuring head 2 is 2. The radius of the hole in the workpiece 4 to be measured is R = 2H. The diameter of the hole in the workpiece 4 to be measured is D = 4H.

[0049] Specifically, based on the depth and aperture range of the workpiece 4 to be measured, the reading magnification of the measuring head 2 in this embodiment is 2. In this embodiment, the taper angle α of the measuring head is 63°26′. During machining, the cone angle of the measuring head is 126°52′.

[0050] like Figure 2 As shown, in one embodiment, the measuring head 2 includes a top plane 21 disposed at the small end of the measuring head 2. When measuring the diameter of the hole in the workpiece 4 to be measured, the top plane 21 is located inside the tapered hole of the workpiece 4 to be measured.

[0051] Specifically, the zero point of measurement is when the top plane 21 abuts against the top surface of the workpiece 4. The depth to which the measuring head 2 extends into the conical hole of the workpiece 4 is then the depth measurement value h. Based on the formula for calculating the reading magnification σ of the measuring head 2, the hole radius R of the workpiece can be obtained as follows:

[0052] R = h·tanα + r

[0053] Where r is the radius of the top plane 21.

[0054] The diameter of the hole in workpiece 4 to be tested is calculated using the following formula:

[0055] D = d + 2 × h × tanα

[0056] Where d is the diameter of the top plane 21.

[0057] When the reading magnification of measuring head 2 is 2, the radius of the hole in the workpiece 4 to be measured is: R = 2H + r. The diameter of the hole in the workpiece 4 to be measured is: D = 4H + d.

[0058] Specifically, such as Figure 3 and Figure 4 As shown, the diameter of the top plane 21 is a first value, which is 2mm in this embodiment. The measuring head 2 is used to measure the workpiece 4 to be measured with a hole diameter of 4-19mm. The hole diameter is the hole diameter of the workpiece 4 to be measured.

[0059] Specifically, such as Figure 5 and Figure 6 As shown, the diameter of the top plane 21 is the second value, which is 15mm in this embodiment. The measuring head 2 is used to measure the workpiece 4 to be measured with a hole diameter of 17-39mm. The hole diameter is the hole diameter of the workpiece 4 to be measured.

[0060] Specifically, such as Figure 7 and Figure 8 As shown, the diameter of the top plane 21 is the third value, which is 35mm in this embodiment. The measuring head 2 is used to measure the workpiece 4 to be measured with a hole diameter of 37-51mm. The hole diameter is the hole diameter of the workpiece 4 to be measured.

[0061] Preferably, the measuring head 2 and the clamping rod 1 are integrally formed. Both the measuring head 2 and the clamping rod 1 are made of copper. In this embodiment, the diameter of the clamping rod 1 is 6mm, the measuring head 2 and the clamping rod 1 are machined in one piece, the material is brass, and the weight of the measuring head is less than or equal to 30 grams. Since the height measuring instrument 3 has a built-in air bearing, in order to ensure that the height measuring instrument 3 can move smoothly and freely on the measuring platform, the height measuring instrument 3 needs to be counterweighted, and the weight of the height measuring instrument measuring head needs to be controlled within 30 grams. To ensure the weight of the measuring head, such as Figures 5 to 8 As shown, the measuring head 2 is equipped with a weight-reducing structure, which includes weight-reducing holes and weight-reducing annular grooves. The weight-reducing holes can be blind holes or through holes, depending on the actual situation. Figures 5 to 8 As shown, a weight-reducing annular groove is provided at the upper part of the measuring head 2, and a weight-reducing blind hole is provided at the lower part of the measuring head 2. When the diameter of the hole to be measured in the workpiece 4 is large, the volume of the measuring head 2 increases accordingly. In order to further reduce weight, as shown... Figure 7 and Figure 8 As shown, the upper part of the measuring head 2 is also provided with a weight reduction hole. In order to ensure the strength and wear resistance of the measuring head, brass is selected to make the measuring head in this embodiment.

[0062] Specifically, the diameter of the top plane 21 is 2mm, 15mm, or 35mm, all of which are integers. The diameter of the top plane 21 can also be set according to requirements.

[0063] Because the conical surface of the measuring head 2 of the height gauge 3 has high machining size and precision requirements, the cutting compensation feed value during the machining process needs to be obtained through a large number of experimental tests. The finished measuring head needs to be inspected on a coordinate measuring machine and an image analyzer, and the accuracy of the inspection size is in micrometers.

[0064] This embodiment also provides a height measuring instrument 3, which is equipped with a height measuring instrument probe as described above. Figure 1 and Figure 2 As shown, the clamping rod 1 is clamped and fixed by the height measuring instrument 3, and the measuring head 2 is located at the lower part of the clamping rod 1 to measure the hole diameter of the workpiece 4 to be measured.

[0065] This embodiment also provides a measurement method for a height measuring instrument 3, which uses the height measuring instrument 3 as described above to measure the hole diameter of the workpiece 4 to be measured. The method includes:

[0066] S1: Control the probe of the height measuring instrument 3 to contact the top surface of the workpiece 4 to be measured.

[0067] like Figure 1 As shown, place the workpiece 4 to be measured on the measuring platform. The opening to be measured must be cleaned, facing upwards, and must not have chamfered edges or burrs. Position the top plane 21 of the measuring head 2 against the top surface of the workpiece 4; this is the zero point of the height gauge 3.

[0068] S2: Adjust the workpiece 4 to be measured so that the small end of the height measuring instrument probe is placed on the upper side of the inner hole of the workpiece 4.

[0069] Adjust the workpiece 4 to be measured so that the workpiece 4 and the measuring head 2 are set coaxially.

[0070] S3: Control the probe of the height measuring instrument 3 to extend into the inner hole of the workpiece 4 to be measured until the outer peripheral wall of the measuring head 2 of the height measuring instrument 3 abuts against the upper edge of the hole to be measured in the workpiece 4.

[0071] Specifically, the outer peripheral wall of the measuring head 2 is an external conical surface. The height measuring instrument 3 is activated, and the measuring head 2 moves downwards into the hole to be measured, starting the measurement until the outer peripheral wall of the measuring head 2 of the height measuring instrument 3 abuts against the upper edge of the inner hole of the workpiece 4. Figure 2 As shown.

[0072] S4: Obtain the depth h of the probe of the height measuring instrument 3 extending into the inner hole of the workpiece 4 to be measured.

[0073] S5: Calculate the hole radius R or hole diameter D of the workpiece 4 to be measured based on the depth measurement value h, the reading magnification σ of the measuring head 2, and the radius r of the top plane 21 of the measuring head 2.

[0074] Using the altimeter head in conjunction with altimeter 3, the diameter of the spacer hole of a component in an optical instrument was measured, and the following was found:

[0075] (1) In terms of the measured values, when the height measuring instrument side head of this embodiment is used in conjunction with the height measuring instrument 3 for testing, the measurement accuracy can reach 0.001mm, which improves the measurement accuracy.

[0076] (2) In terms of testing time, when the height measuring instrument side head of this implementation is used in conjunction with the height measuring instrument 3 for testing, it takes about 12 minutes to test 50 workpieces, which improves the testing efficiency by 76.9%.

[0077] In this embodiment, the height measuring probe works in conjunction with the height measuring instrument 3 to improve the accuracy and stability of the detection data, ensure the accuracy of parts processing, improve the processing quality and pass rate of parts, and also improve the pass rate of product objective lens and eyepiece assembly, thus ensuring the assembly quality of the product.

[0078] In this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0079] Other embodiments of the present invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only.

[0080] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A height finder head, characterized by, Comprise: A clamping rod and a measuring head, the clamping rod and the height gauge are connected, the measuring head is used for measuring the hole diameter of the workpiece to be measured; the measuring head and the clamping rod are integrally formed; The measuring head is a cone, and the reading magnification of the measuring head is the tangent function value of the taper of the measuring head; The measuring head comprises a top plane, and the top plane is arranged at the small end of the measuring head.

2. The measuring head of the height gauge according to claim 1, wherein the reading magnification of the measuring head is a positive integer.

3. The measuring head of the height gauge according to claim 1, wherein the reading magnification of the measuring head is 2.

4. The measuring head of the height gauge according to claim 1, wherein the diameter of the top plane is a first value, and the measuring head is used for measuring the workpiece to be measured with a hole diameter of 4-19mm.

5. The measuring head of the height gauge according to claim 1, wherein the diameter of the top plane is a second value, and the measuring head is used for measuring the workpiece to be measured with a hole diameter of 17-39mm.

6. The measuring head of the height gauge according to claim 1, wherein the diameter of the top plane is a third value, and the measuring head is used for measuring the workpiece to be measured with a hole diameter of 37-51mm. A height gauge head as claimed in any one of claims 1 to 6 is arranged thereon. ​ ​ ​ ​ 7. An altimeter, characterized by ​

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