A steel ball type conical hole depth detection device and detection method

Abstract

This invention discloses a steel ball-type conical hole depth detection device and method, relating to the field of conical hole depth detection technology. The device includes: a measuring platform, a fixed frame, an integrated dial indicator, a pressure plate, and a steel ball. The fixed frame includes a vertical rod and a horizontal rod. The bottom of the vertical rod is fixedly connected to the measuring platform, one end of the horizontal rod is mechanically connected to the vertical rod, and the upper side of the other end of the horizontal rod is fixedly connected to the integrated dial indicator, while the lower side is fixedly connected to the pressure plate. The integrated dial indicator has an embedded conical hole depth calculation program, which includes a conical hole depth algorithm based on the geometric relationship between the depths of long and short conical holes and the steel ball. By constructing a steel ball-type conical hole depth detection device and designing a conical hole depth algorithm based on the geometric relationship between the depths of long and short conical holes and the steel ball, and embedding it into the integrated dial indicator, this application enables quantitative and accurate measurement of the conical hole depth, improving the accuracy and efficiency of conical hole depth detection.

Description

Technical Field

[0001] This application relates to the field of conical hole depth detection technology, and in particular to a steel ball type conical hole depth detection device and detection method. Background Technology

[0002] Tapered hole structures are widely used in various industrial products. However, depth measurement of tapered holes has always been a challenging problem. This is mainly because there is a rounding at the junction of the tapered surface and the inner hole's circular surface, such as... Figure 2 As shown, the rounding is caused by the radius of the cutting tool tip, which is unavoidable. This makes it impossible for general depth measuring tools to accurately locate the start and end positions of the tapered hole, resulting in the problem of inaccurate measurement of the tapered hole depth. Therefore, it is necessary to study the tapered hole depth measuring device and method.

[0003] Currently, there are three common methods for measuring the depth of tapered holes with low tolerance requirements: ① Direct measurement using a depth gauge. This method, due to the rounded opening of the tapered hole, only provides a reference value, resulting in significant measurement error. ② Measurement only on the first piece after sectioning, ensuring accuracy through lathe programming. This method is accurate but cannot precisely measure the tapered hole depth for every product, posing potential risks. ③ Using a tight-fitting plug gauge to measure the tapered hole depth. However, the rounded opening of the tapered hole also affects measurement accuracy, and since each tapered hole size and tolerance is different, each plug gauge is only suitable for one type of tapered hole, resulting in poor versatility.

[0004] In the prior art, Chinese patent CN103486943A discloses a conical hole depth detection device, including a detection body, a top column, a dial indicator, and a spherical measuring element. The detection body includes a first end and a second end opposite to the first end, and has a receiving cavity. The top column is slidably disposed within the receiving cavity of the detection body along the central axis of the detection body, and the top column has a first end face and a second end face opposite to the first end face. The dial indicator includes a dial head and a dial rod connected to the dial head, the dial rod passing through the first end of the detection body and having a measuring end face, which abuts against the first end face of the top column. The spherical measuring element is located at the second end of the detection body and abuts against the second end face of the top column.

[0005] However, the aforementioned existing technologies cannot quantitatively and accurately measure the depth of the conical hole, resulting in poor accuracy and efficiency in conical hole depth detection. Summary of the Invention

[0006] This application provides a steel ball type tapered hole depth detection device and detection method to solve the problem that the existing technology cannot quantitatively and accurately measure the depth of tapered holes, and the accuracy and efficiency of tapered hole depth detection are poor.

[0007] On the one hand, this application provides a steel ball type conical hole depth detection device, including: a measuring platform, a fixing frame, an integrated dial indicator, a pressure plate, and a steel ball; the fixing frame includes a vertical rod and a horizontal rod.

[0008] The bottom of the vertical rod is fixedly connected to the measuring platform, one end of the horizontal rod is mechanically connected to the vertical rod, the upper side of the other end of the horizontal rod is fixedly connected to the integrated dial indicator, and the lower side is fixedly connected to the pressure plate.

[0009] The integrated dial indicator has an embedded tapered hole depth calculation program, which includes a tapered hole depth algorithm based on the geometric relationship between the long and short tapered hole depths and the steel ball.

[0010] The measuring platform is used to place the tapered hole part.

[0011] The horizontal bar is used to move up and down and be fixed along the axial direction of the vertical bar, thereby driving the integrated dial indicator and the pressure plate to move up and down and be fixed.

[0012] The steel ball is used to be placed in the tapered hole of the tapered part.

[0013] The pressure plate is used to press down the steel ball under the action of the horizontal bar.

[0014] The integrated dial indicator is used to measure the height difference between the top of the steel ball and the upper end face of the tapered hole part, and the tapered hole depth is calculated based on the height difference using the tapered hole depth algorithm.

[0015] In one possible implementation, the cone hole depth algorithm based on the relationship between the long and short cone hole depths and the steel ball geometry includes: Construct geometric relationship models between the depth of a short conical hole and the steel ball, and geometric relationship models between the depth of a long conical hole and the steel ball; in the geometric relationship model between the depth of a short conical hole and the steel ball, the top of the steel ball is higher than the upper end face of the conical hole part; in the geometric relationship model between the depth of a long conical hole and the steel ball, the top of the steel ball is lower than the upper end face of the conical hole part.

[0016] Based on the aforementioned model of the relationship between the depth of the short conical hole and the geometric relationship between the steel ball, a formula for calculating the depth of the short conical hole is designed; based on the aforementioned model of the relationship between the depth of the long conical hole and the geometric relationship between the steel ball, a formula for calculating the depth of the long conical hole is designed.

[0017] The formulas for calculating the depth of the short conical hole and the long conical hole are simplified into a single formula for calculating the depth of the conical hole.

[0018] In one possible implementation, the integrated dial indicator integrates the steel ball radius and the large end diameter, small end diameter, and semi-cone angle of the tapered hole component.

[0019] The integrated dial indicator is used to calculate the conical hole depth using the conical hole depth algorithm based on the height difference, the steel ball radius, the large end diameter, the small end diameter, and the half-cone angle.

[0020] In one possible implementation, the radius of the steel ball is pre-measured using an outside micrometer.

[0021] The diameter of the large end and the diameter of the small end are measured in advance using an inside micrometer.

[0022] The semi-cone angle is measured in advance using a probe contact measurement method.

[0023] In one possible implementation, the tapered hole depth calculation program includes a data import module, a data storage module, and a result output module.

[0024] The data import module is used to import pre-measured parameters.

[0025] The data storage module is used to store pre-measured parameters and corresponding cone hole depth calculation results.

[0026] The result output module is used to output the calculation results of the conical hole depth.

[0027] In one possible implementation, the pressure plate has a stepped outer circle shape.

[0028] In one possible implementation, the integrated dial indicator is fixed to the upper side of the end of the horizontal bar away from the vertical bar by a clamp.

[0029] On the other hand, this application provides a method for detecting the depth of a steel ball-type conical hole, which uses the above-mentioned steel ball-type conical hole depth detection device and includes the following steps: Step 1: Measure the large end diameter, small end diameter, and half-cone angle of the tapered hole part and input them into the integrated dial indicator; Step 2: Measure and select a steel ball whose diameter is between the diameter of the large end and the diameter of the small end, obtain the steel ball radius, and input it into the integrated dial indicator; Step 3: Place the tapered hole part on the measuring platform and place the steel ball into the tapered hole of the tapered hole part; Step 4: Adjust the horizontal bar of the fixing frame to move down, causing the pressure plate to press down on the steel ball, with the top of the steel ball as the reference zero point of the integrated dial indicator; Step 5: Adjust the horizontal bar of the fixing frame to move it upward, move the tapered hole part laterally, adjust the horizontal bar of the fixing frame to move it downward again, measure the height of the upper end face of the tapered hole part, and obtain the height difference between the top of the steel ball and the upper end face of the tapered hole part. The height difference is automatically recorded into the integrated dial indicator. Step 6, Read the conical hole depth: The conical hole depth is automatically calculated and displayed using the conical hole depth algorithm based on the height difference, steel ball radius, large end diameter, small end diameter, and half-cone angle.

[0030] The steel ball type conical hole depth detection device and detection method disclosed in this application have the following advantages: By constructing a steel ball-type conical hole depth detection device, designing a conical hole depth algorithm based on the geometric relationship between the depths of long and short conical holes and the steel ball, and embedding it into an integrated dial gauge, the depth of the conical hole can be quantitatively and accurately measured, thus improving the accuracy and efficiency of conical hole depth detection. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of a steel ball type conical hole depth detection device provided in an embodiment of this application; Figure 2 A partially enlarged schematic diagram of the theoretical depth of the conical hole is provided for the background art of this application; Figure 3 The model showing the relationship between the depth of the short conical hole and the geometry of the steel ball provided in the embodiments of this application; Figure 4 The model showing the relationship between the depth of the tapered hole and the geometry of the steel ball provided in the embodiments of this application; Figure 5 A schematic diagram illustrating the probe contact measurement method for measuring the half-cone angle provided in this application embodiment; Figure 6 This is a schematic diagram of the cross-sectional structure of the valve seat provided in the embodiments of this application; Figure 7 A photograph of the actual object measured by the video measuring instrument provided in the embodiments of this application; Figure 8 A schematic diagram of the interface of the tapered hole depth calculation program provided in the embodiments of this application.

[0033] Explanation of reference numerals in the attached figures: 1-Measuring platform, 2-Fixed frame, 3-Integrated dial indicator, 4-Pressure plate, 5-Steel ball, 6-Conical hole part. Detailed Implementation

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

[0035] like Figure 1 As shown in the figure, this application provides a steel ball type conical hole depth detection device, including: a measuring platform 1, a fixing frame 2, an integrated dial indicator 3, a pressure plate 4, and a steel ball 5; the fixing frame 2 includes a vertical rod and a horizontal rod.

[0036] The bottom of the vertical rod is fixedly connected to the measuring platform 1, one end of the horizontal rod is mechanically connected to the vertical rod, the upper side of the other end of the horizontal rod is fixedly connected to the integrated dial indicator 3, and the lower side is fixedly connected to the pressure plate 4.

[0037] The integrated dial gauge 3 has an embedded tapered hole depth calculation program, which includes a tapered hole depth algorithm based on the geometric relationship between the long and short tapered hole depths and the steel ball.

[0038] The measuring platform 1 is used to place the tapered hole part 6.

[0039] The horizontal bar is used to move up and down and fix itself along the axial direction of the vertical bar, thereby driving the integrated dial indicator 3 and the pressure plate 4 to move up and down and fix themselves.

[0040] The steel ball 5 is used to be placed in the tapered hole of the tapered hole part 6.

[0041] The pressure plate 4 is used to press down the steel ball 5 under the action of the horizontal bar.

[0042] The integrated dial indicator 3 is used to measure the height difference between the top of the steel ball 5 and the upper end face of the conical hole part 6, and to calculate the conical hole depth based on the height difference using the conical hole depth algorithm.

[0043] For example, the cone hole depth algorithm based on the relationship between the length and short conical hole depths and the steel ball geometry includes: Construct a geometric relationship model between the depth of a short conical hole and the geometric relationship model between the depth of a long conical hole and the geometric relationship model between the depth of a short conical hole and the geometric relationship model between the depth of a short conical hole and the geometric relationship model between the depth of a short conical hole and the geometric relationship model between the depth of a short conical hole and the geometric relationship model between the depth of a short conical hole and the geometric relationship model between the depth of a short conical hole and the geometric relationship model between the depth of a long ...

[0044] Based on the aforementioned model of the relationship between the depth of the short conical hole and the geometric relationship between the steel ball, a formula for calculating the depth of the short conical hole is designed; based on the aforementioned model of the relationship between the depth of the long conical hole and the geometric relationship between the steel ball, a formula for calculating the depth of the long conical hole is designed.

[0045] The formulas for calculating the depth of the short conical hole and the long conical hole are simplified into a single formula for calculating the depth of the conical hole.

[0046] Specifically, by Figure 2 As can be seen, the theoretical depth of the conical hole is the depth of the intersection line formed by the extended surface of the conical surface and the extended surface of the inner circle. The steel ball type conical hole depth detection device of this application indirectly realizes the calculation and measurement of the theoretical depth of the conical hole by measuring the measurable dimension by utilizing the triangular geometric relationship between the steel ball and the conical hole.

[0047] like Figure 3 and Figure 4 The figures show the geometric relationship models between the depth of the short conical hole and the steel ball, and the geometric relationship models between the depth of the long conical hole and the steel ball, respectively. Figure 3 and Figure 4 In the diagram, A and B represent the left and right endpoints of the large-end diameter of the conical hole part 6, respectively; C and D represent the left and right endpoints of the small-end diameter of the conical hole part 6, respectively; O represents the center of the steel ball 5; F represents the midpoint of the large-end diameter of the conical hole part 6; E represents the midpoint of the small-end diameter of the conical hole part 6; P and Q represent the left and right contact points between the steel ball 5 and the conical surface of the conical hole part 6 (i.e., the left and right perpendicular feet from the center of the steel ball 5 to the conical surface of the conical hole part 6), respectively; K represents the intersection of the lower extensions of the conical surface of the conical hole part 6; h represents the height difference between the top of the steel ball 5 and the upper end face of the conical hole part 6; and r represents the radius of the steel ball. H1 represents the half-cone angle of the tapered hole part 6, H2 represents the depth of the large end of the tapered hole of the tapered hole part 6 from the upper end face, and H2 represents the depth of the small end of the tapered hole of the tapered hole part 6 from the upper end face.

[0048] exist Figure 3 In the middle, the top of steel ball 5 is higher than the upper end face of tapered hole part 6, according to Figure 3 Based on the geometric relationships and trigonometric functions, the formulas for calculating the depth of the short conical hole are shown in equations (1) and (2): (1) (2) in, This represents the distance from the center O of the steel ball 5 to the midpoint F of the large end diameter of the tapered hole part 6. This represents the distance from the midpoint F of the large end diameter of the tapered hole part 6 to the intersection point K of the lower extension line of the tapered surface of the tapered hole part 6. This represents the distance from the center O of steel ball 5 to the intersection point K of the lower extension lines of the conical surface of conical hole part 6. This indicates the diameter of the large end of the tapered hole part 6. This represents the distance from the center O of the steel ball 5 to the midpoint E of the small end diameter of the tapered hole part 6. This represents the distance from the midpoint E of the small end diameter of the tapered hole part 6 to the intersection point K of the lower extension line of the tapered surface of the tapered hole part 6. This indicates the small end diameter of the tapered hole part 6.

[0049] exist Figure 4 In the middle, the top of the steel ball 5 is lower than the upper end face of the tapered hole part 6, according to Figure 4 Based on the geometric relationships and trigonometric functions, the formulas for calculating the depth of the long conical hole are shown in equations (3) and (4): (3) (4) From equations (1) to (4), it can be seen that when the top of the steel ball 5 is higher than the upper end face of the conical hole part 6, the sign of h is "-", and when the top of the steel ball 5 is lower than the upper end face of the conical hole part 6, the sign of h is "+". Therefore, h can be regarded as a vector. When the top of the steel ball 5 is higher than the upper end face of the tapered hole part 6, This indicates that h is negative when the top of the steel ball 5 is lower than the upper end face of the tapered hole part 6. Indicates that h is a positive value, and simplifies the formulas for calculating the depth of the short conical hole and the long conical hole into the formulas for calculating the depth of the conical hole as shown in equations (5) and (6): (5) (6) The taper hole depth calculation formula can be used to calculate the taper hole depth H1 from the large end of the taper hole of part 6 to the upper end face, and the taper hole depth H2 from the small end of the taper hole of part 6 to the upper end face.

[0050] Further simplifying equations (5) and (6) into equation (7): (7) Where H represents the depth H1 of the tapered hole from the large end to the upper end face of the tapered hole part 6, or the depth H2 of the tapered hole from the small end to the upper end face of the tapered hole part 6, and d represents the diameter of the large end of the tapered hole part 6. Or the small end diameter of the tapered hole part 6 .

[0051] like Figure 1 As shown, when the diameter d of the tapered hole is input as the diameter of the larger end... When the taper hole depth H is input, the taper hole depth H1 is output; when the taper hole diameter d is input, the smaller end diameter is output. At that time, the output of the cone hole depth H is the cone hole depth H2.

[0052] In actual measurements, the height difference h of the integrated dial indicator 3 can display positive and negative values. Therefore, based on the characteristics of the cone hole depth calculation formula, when measuring the height difference between the top of the steel ball 5 and the upper end face of the cone hole part 6, the top of the steel ball 5 is first used as the reference zero point of the integrated dial indicator 3. Then, the height of the upper end face of the cone hole part 6 is measured. The positive and negative values ​​displayed by the integrated dial indicator 3 at this time are exactly the positive and negative values ​​of h, which can directly represent the values ​​in the cone hole depth calculation formula. .

[0053] For example, the integrated dial indicator 3 integrates the steel ball radius and the large end diameter, small end diameter, and semi-cone angle of the tapered hole part 6.

[0054] The integrated micrometer 3 is used to calculate the conical hole depth using the conical hole depth algorithm based on the height difference, the steel ball radius, the large end diameter, the small end diameter, and the half-cone angle.

[0055] For example, the radius of the steel ball is measured in advance using an outside micrometer.

[0056] The diameter of the large end and the diameter of the small end are measured in advance using an inside micrometer.

[0057] The semi-cone angle is measured in advance using a probe contact measurement method.

[0058] Specifically, the radius r of the steel ball is obtained by measuring the diameter of the steel ball 5 using an outside micrometer and dividing it by 2, where the larger end diameter is... Small end diameter All measurements were obtained using an inside micrometer. A steel ball (ball 5) with a diameter between the large and small end diameters was selected, and approximately equal to the large end diameter. The specifications are to reduce measurement errors.

[0059] Probe contact measurement method for measuring half-cone angle, such as Figure 5 As shown, a spherical probe is used to measure the positions of four points (two on each side) on the conical surface of the conical hole part 6. Then, the points are connected by a measuring instrument (one straight line on each side), and the angle between the two straight lines is measured, which is the conical hole angle 2. Divide by 2 to get the half cone angle. To ensure that the measurement error is as small as possible, when measuring the cone angle, the positions of two points on the same side should be as far apart as possible.

[0060] In one possible embodiment, a valve seat, a component of a certain valve, is selected as the tapered bore component 6 for experimental verification. Its structural cross-section is shown below. Figure 6 As shown in the diagram, the cross-section of the structure reveals a tapered hole in the valve seat. To measure the depth H1 of the tapered hole from its large end to its upper surface, it is only necessary to measure the diameter 2r of the steel ball 5, the height difference h between the top of the steel ball 5 and the upper surface of the valve seat, and the angle 2 of the tapered hole. And the large end diameter of the valve seat Due to the large end diameter The theoretical value is φ9mm, therefore the steel ball diameter is selected as 2r=8.000mm. The four measurable values ​​of the valve seat are shown in Table 1: Table 1. Four measurable values ​​of the valve seat component.

[0061] Substituting the parameters from Table 1 into equation (5), we obtain the calculated value of the cone hole depth H1, which is the distance from the large end of the cone hole to the upper end face of the valve seat. The valve seat is then sectioned along the central axis of the cone hole, as shown below. Figure 6 As shown; then, the actual depth of the conical hole is measured using a video measuring instrument, as shown. Figure 7 As shown in Table 2, the calculated and measured values ​​of the conical hole depth H1 are compared. Table 2 Comparison of calculated and measured values ​​of cone hole depth H1

[0062] As can be seen from Table 2, the calculated value of the conical hole depth H1 of the valve seat of part number 1# differs from the measured value by 9μm, and the calculated value of the conical hole depth H1 of the valve seat of part number 2# differs from the measured value by 6μm. Both are within 0.01mm. Since the conical hole depth is generally within the free tolerance or the tolerance range of 0.1mm, it is feasible to use the steel ball type conical hole depth detection device of this application to measure the conical hole depth.

[0063] In this embodiment, the cone hole depth calculation program is built on the QT framework and the C++ programming language, aiming to improve calculation accuracy, save calculation time, and avoid errors that may occur in manual calculations. QT was chosen as the development platform because it is a cross-platform application development framework, allowing application software to run easily on different operating systems. This means the cone hole depth calculation software can run seamlessly on various operating systems such as Windows, Linux, and Mac, providing users with greater flexibility and convenience. C++ is used for software development; it is an efficient, reliable, and widely used programming language. C++ has good performance and high flexibility, meeting the requirements for accurate calculation and fast response.

[0064] During the software's design and development, the characteristics and requirements of conical hole depth calculation were fully considered. An easy-to-use user interface was provided, allowing users to calculate the conical hole depth by inputting relevant parameters. The software automatically performs the calculation based on the user's input and provides accurate results. Using software to calculate the conical hole depth avoids errors that may occur in manual calculations and significantly improves accuracy. Furthermore, time-saving measures were taken, employing efficient algorithms and optimized code structure to minimize computation time. Therefore, users can obtain accurate conical hole depth calculation results in a short time, improving work efficiency. The interface of the conical hole depth calculation program is shown below. Figure 8 As shown. The program verification showed no problems. This calculation program was then imported into the integrated dial indicator 3 for easy operation by measurement personnel.

[0065] For example, the tapered hole depth calculation program includes a data import module, a data storage module, and a result output module.

[0066] The data import module is used to import pre-measured parameters.

[0067] The data storage module is used to store pre-measured parameters and corresponding cone hole depth calculation results.

[0068] The result output module is used to output the calculation results of the conical hole depth.

[0069] Specifically, in this embodiment, the pre-measured parameters are the pre-measured steel ball radius and the large end diameter, small end diameter, and semi-cone angle of the tapered hole part 6. Based on the data storage module and result output module, users can easily manage and view the previous calculation results, and can export the results as documents or charts to meet different needs.

[0070] The tapered hole depth calculation program leverages the advantages of QT and C++ to improve computational efficiency, save computation time, and avoid human error. It will play an important role in engineering design and construction, helping users to better complete their tasks.

[0071] For example, the pressure plate 4 has a stepped outer circle shape.

[0072] For example, the integrated dial indicator 3 is fixed to the upper side of the end of the horizontal bar away from the vertical bar by a clamp.

[0073] In this embodiment, the flatness of the measuring platform 1 is within 0.001mm; the horizontal rod and vertical rod of the fixing frame 2 are connected by a spiral structure (such as an electric lead screw, or in other possible embodiments, a sliding groove and screw structure, or other structures that allow the horizontal rod to move up and down and be fixed along the axial direction of the vertical rod) to adjust the height of the horizontal rod, reducing the risk of the horizontal rod slipping; the gauge clamp is composed of two plates and screws connected together to fix the integrated dial indicator 3. In other possible embodiments, other fixing methods such as snap-fit ​​and welding can also be used to fix the integrated dial indicator 3; the pressure plate 4 adopts a stepped outer circle shape, the flatness of the bottom surface is within 0.001mm, and the perpendicularity of the bottom surface to the integrated dial indicator 3 is within 0.005; the steel balls 5 are all solid steel balls for measurement, and the dimensional tolerances are all within 1μm.

[0074] This application also provides a method for detecting the depth of a steel ball-type conical hole, which uses the above-mentioned steel ball-type conical hole depth detection device and includes the following steps: Step 1: Measure the large end diameter, small end diameter, and half-cone angle of the tapered hole part 6 and input them into the integrated dial indicator 3.

[0075] Step 2: Measure and select steel ball 5 whose diameter is between the diameter of the large end and the diameter of the small end, obtain the steel ball radius, and input it into the integrated dial indicator 3.

[0076] Step 3: Place the tapered hole part 6 on the measuring platform 1, and place the steel ball 5 in the tapered hole of the tapered hole part 6.

[0077] Step 4: Adjust the horizontal bar of the fixing frame 2 to move it down, causing the pressure plate 4 to press down on the steel ball 5, with the top of the steel ball 5 as the reference zero point of the integrated dial indicator 3.

[0078] Step 5: Adjust the horizontal bar of the fixing frame 2 to move it upward, move the tapered hole part 6 laterally, adjust the horizontal bar of the fixing frame 2 to move it downward again, measure the height of the upper end face of the tapered hole part 6, and obtain the height difference between the top of the steel ball 5 and the upper end face of the tapered hole part 6. The height difference is automatically recorded into the integrated dial gauge 3.

[0079] Step 6, Read the conical hole depth: The conical hole depth is automatically calculated and displayed using the conical hole depth algorithm based on the height difference, steel ball radius, large end diameter, small end diameter, and half-cone angle.

[0080] This application embodiment constructs a steel ball-type conical hole depth detection device, designs a conical hole depth algorithm based on the geometric relationship between the depth of long and short conical holes and the steel ball, and embeds it into an integrated dial gauge 3. This enables quantitative and accurate measurement of the conical hole depth, improving the accuracy and efficiency of conical hole depth detection.

[0081] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0082] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A steel ball type conical hole depth detection device, characterized in that, include: The measuring platform, mounting frame, integrated dial indicator, pressure plate, and steel ball are included; the mounting frame includes a vertical rod and a horizontal rod. The bottom of the vertical rod is fixedly connected to the measuring platform, one end of the horizontal rod is mechanically connected to the vertical rod, the upper side of the other end of the horizontal rod is fixedly connected to the integrated dial indicator, and the lower side is fixedly connected to the pressure plate; The integrated dial indicator has an embedded tapered hole depth calculation program, which includes a tapered hole depth algorithm based on the relationship between the depth of long and short tapered holes and the geometry of the steel ball. The measuring platform is used to place the tapered hole part; The horizontal bar is used to move up and down and fix itself along the axial direction of the vertical bar, thereby driving the integrated dial indicator and the pressure plate to move up and down and fix themselves. The steel ball is used to be placed in the tapered hole of the tapered hole part; The pressure plate is used to press down the steel ball under the action of the horizontal bar; The integrated dial indicator is used to measure the height difference between the top of the steel ball and the upper end face of the tapered hole part, and the tapered hole depth is calculated based on the height difference using the tapered hole depth algorithm.

2. The steel ball type conical hole depth detection device according to claim 1, characterized in that, The cone hole depth algorithm based on the relationship between the length and shortness of the cone hole depth and the geometry of the steel ball includes: Construct two geometric relationship models: one for the depth of a short conical hole and the other for the geometry of a steel ball. In the short conical hole model, the top of the steel ball is higher than the upper surface of the conical hole part. In the long conical hole model, the top of the steel ball is lower than the upper surface of the conical hole part. Based on the aforementioned model of the relationship between the short conical hole depth and the steel ball geometry, a formula for calculating the short conical hole depth is designed; based on the aforementioned model of the long conical hole depth and the steel ball geometry, a formula for calculating the long conical hole depth is designed. The formulas for calculating the depth of the short conical hole and the long conical hole are simplified into a single formula for calculating the depth of the conical hole.

3. The steel ball type conical hole depth detection device according to claim 1, characterized in that, The integrated dial indicator integrates the steel ball radius and the large end diameter, small end diameter, and semi-cone angle of the tapered hole part; The integrated dial indicator is used to calculate the conical hole depth using the conical hole depth algorithm based on the height difference, the steel ball radius, the large end diameter, the small end diameter, and the half-cone angle.

4. The steel ball type conical hole depth detection device according to claim 3, characterized in that, The radius of the steel ball was measured in advance using an outside micrometer. The diameter of the large end and the diameter of the small end are measured in advance using an inside micrometer. The semi-cone angle is measured in advance using a probe contact measurement method.

5. The steel ball type conical hole depth detection device according to claim 1, characterized in that, The tapered hole depth calculation program includes a data import module, a data storage module, and a result output module. The data import module is used to import pre-measured parameters; The data storage module is used to store the pre-measured parameters and the corresponding cone hole depth calculation results; The result output module is used to output the calculation results of the conical hole depth.

6. The steel ball type conical hole depth detection device according to claim 1, characterized in that, The pressure plate has a stepped outer circle shape.

7. The steel ball type conical hole depth detection device according to claim 1, characterized in that, The integrated dial indicator is fixed to the upper side of the end of the horizontal bar away from the vertical bar by a clamp.

8. A method for detecting the depth of a steel ball-type conical hole, characterized in that, The steel ball type conical hole depth detection device as described in any one of claims 1 to 7 includes the following steps: Step 1: Measure the large end diameter, small end diameter, and half-cone angle of the tapered hole part and input them into the integrated dial indicator; Step 2: Measure and select a steel ball whose diameter is between the diameter of the large end and the diameter of the small end, obtain the steel ball radius, and input it into the integrated dial indicator; Step 3: Place the tapered hole part on the measuring platform and place the steel ball into the tapered hole of the tapered hole part; Step 4: Adjust the horizontal bar of the fixing frame to move down, causing the pressure plate to press down on the steel ball, with the top of the steel ball as the reference zero point of the integrated dial indicator; Step 5: Adjust the horizontal bar of the fixing frame to move it upward, move the tapered hole part laterally, adjust the horizontal bar of the fixing frame to move it downward again, measure the height of the upper end face of the tapered hole part, and obtain the height difference between the top of the steel ball and the upper end face of the tapered hole part. The height difference is automatically recorded into the integrated dial indicator. Step 6, Read the conical hole depth: The conical hole depth is automatically calculated and displayed using the conical hole depth algorithm based on the height difference, steel ball radius, large end diameter, small end diameter, and half-cone angle.

Images