Conical countersink auxiliary measuring device

Abstract

The present invention provides a conical countersink auxiliary measuring device for measuring the countersink depth of a conical countersink, wherein the conical countersink is provided on a mounting surface. The conical countersink auxiliary measuring device of the present invention comprises a mandrel, a conical head and a support, wherein the conical head has a bottom surface and a side surface, wherein the bottom surface is provided at one end of the mandrel, and the side surface can extend into the countersink and fit with the inner wall of the countersink. The support is slidably matched with the mandrel, and the support has a reference surface, and the reference surface is provided with a support foot, and the support foot can fit with the mounting surface as the support moves.

Description

Technical Field

[0001] The invention relates to a tapered countersink auxiliary measuring device. Background Art

[0002] Conical countersink is a common countersink form, which usually includes a straight hole and a countersunk head at the end of the straight hole. A matching bushing needs to be installed inside the countersunk hole, and the end face of the bushing is flush with the mounting surface. The bushing is processed according to the size of the existing countersunk hole. However, since the countersunk head is connected to the straight hole and is tapered, the depth of the countersunk head (the extension distance of the countersunk head along the axial direction) is difficult to measure directly, which affects the processing of the bushing.

[0003] In the prior art, in order to obtain the depth of the countersunk head, it is usually necessary to process a test block that matches the tapered countersunk hole, and the height of the test block is the depth of the countersunk head. However, in this process, the test block needs to be repeatedly processed and the size of the test block needs to be adjusted until the test block and the tapered countersunk hole match well. However, such an operation is relatively complicated and time-consuming, and is affected by the processing accuracy of the test block, resulting in low accuracy of the measurement result.

[0004] The above information disclosed in this Background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is already known to a person of ordinary skill in the art. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art and to provide a conical counterbore auxiliary measuring device which can simplify the operation and improve the measuring accuracy.

[0006] Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

[0007] According to one aspect of the present invention, a conical countersink auxiliary measuring device is provided, which is used to measure the countersink depth of a conical countersink, wherein the conical countersink is provided on a mounting surface. The conical countersink auxiliary measuring device comprises a push rod, a cone head and a support, wherein the cone head has a bottom surface and a side surface, wherein the bottom surface is provided at one end of the push rod, and the side surface can extend into the countersink and fit with the inner wall of the countersink. The support is slidably matched with the push rod, and the support has a reference surface, wherein the reference surface is provided with a support foot, and the support foot can fit with the mounting surface as the support moves.

[0008] According to one embodiment of the present invention, when the support leg is attached to the mounting surface and the cone head extends into the countersunk hole, the depth of the countersunk head, the distance between the bottom surface and the reference plane, the diameter of the bottom surface, the inner diameter of the conical countersunk hole, the angle between the bottom surface and the generatrix of the side surface, and the distance between the reference plane and the mounting surface satisfy the following relationship:

[0009]

[0010] Wherein, U is the depth of the countersunk head, M is the distance between the bottom surface and the reference surface, D is the outer diameter of the bottom surface, and d is the inner diameter of the conical countersunk hole. is the included angle between the bottom surface and the generatrix of the side surface, and L is the distance between the reference plane and the mounting surface.

[0011] According to an embodiment of the present invention, the support foot is located outside the side surface, and the surface of the support foot close to the cone head is a curved surface matching the edge of the bottom surface.

[0012] According to an embodiment of the present invention, the number of the supporting feet is two, and the two supporting feet are symmetrically distributed on both sides of the cone head.

[0013] According to an embodiment of the present invention, the reference surface is provided with a through hole, and the ejector rod passes through the through hole and is slidably engaged.

[0014] According to one embodiment of the present invention, the reference surface, the bottom surface and the mounting surface are all planes, and when the support leg is attached to the mounting surface and the cone head extends into the countersunk hole, the reference surface, the bottom surface and the mounting surface are parallel to each other.

[0015] According to one embodiment of the present invention, the cone head is a conical structure or a truncated cone structure.

[0016] According to one embodiment of the present invention, the cone head and the push rod are an integrated structure.

[0017] According to one embodiment of the present invention, the cone head is detachably connected to the push rod.

[0018] According to an embodiment of the present invention, the support leg and the support base are an integrated structure.

[0019] It can be seen from the above technical solution that the present invention has at least one of the following advantages and positive effects:

[0020] During measurement, the push rod can be set along the central axis of the conical countersunk hole, and the cone head can be inserted into the conical countersunk hole so that the side of the cone head fits with the inner wall of the conical countersunk hole; then the support can be slid along the push rod toward the installation surface until the support foot fits with the installation surface; then, the distance between the reference surface and the installation surface can be measured by a measuring tool such as a vernier caliper; finally, the depth of the countersunk head can be calculated by combining the geometric relationship between the predetermined support foot height, the angle between the generatrix of the bottom surface and the side surface, the diameter of the bottom surface, and the inner diameter of the conical countersunk hole. In this way, it is possible to avoid repeatedly processing the test block to measure the depth of the countersunk head, simplify the measurement operation, and at the same time, avoid the error caused by repeated processing, thereby improving the accuracy of the measurement result. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

[0022] Figure 1 is a schematic diagram of a tapered counterbore;

[0023] Figure 2 is a schematic diagram of a tapered counterbore auxiliary measurement device according to an embodiment of the present invention;

[0024] Figure 3 yes Figure 2 Enlarged view of part A in the middle;

[0025] Figure 4 yes Figure 2 A three-dimensional view of the ejector rod and cone head of the medium conical countersink auxiliary measuring device;

[0026] Figure 5 yes Figure 2 Front view of the ejector rod and cone head of the medium conical counterbore auxiliary measuring device;

[0027] Figure 6 yes Figure 2 A three-dimensional view of the support of the medium conical counterbore auxiliary measuring device;

[0028] Figure 7 yes Figure 2 Front view of the support for the auxiliary measuring device for medium conical countersunk holes.

[0029] In the figure: 100, conical countersunk hole; 101, countersunk head; 102, straight hole; 200, mounting surface; 300, connecting piece; 1, push rod; 2, conical head; 21, bottom surface; 22, side surface; 3, support; 31, reference surface; 311, through hole; 32, support foot. DETAILED DESCRIPTION

[0030] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein. Although relative terms such as "above" and "below" are used in this specification to describe the relative relationship of one component of the illustration to another component, these terms are used in this specification only for convenience, such as according to the orientation of the examples described in the accompanying drawings. It is understood that if the device of the illustration is turned upside down, the component described as "above" will become the component "below". Other relative terms such as "top", "bottom", etc. are also used to have similar meanings. When a structure is "on" other structures, it may mean that a structure is integrally formed on other structures, or that a structure is "directly" disposed on other structures, or that a structure is "indirectly" disposed on other structures through another structure. The terms "a", "an", "the" and "said" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to indicate an open-ended inclusive meaning and mean that there may be additional elements / components / etc. in addition to the listed elements / components / etc.

[0031] like Figure 1 As shown, an embodiment of the present invention provides a conical countersink auxiliary measuring device, which can be used to measure the depth of a countersink 101 of a conical countersink 100. The conical countersink 100 can be opened on a mounting surface 200, and the mounting surface 200 can be a surface of a connector 300. At the same time, the conical countersink 100 can include a countersink 101 and a straight hole 102. The countersink 101 is a conical structure with a large end and a small end. The small end is connected to the end of the straight hole 102, and the large end is located on the mounting surface 200. The inner diameter of the conical countersink 100 is the inner diameter d of the straight hole 102.

[0032] like Figure 2 and Figure 3 As shown, the conical countersunk hole auxiliary measuring device of the embodiment of the present invention may include a mandrel 1, a cone head 2 and a support 3. The cone head 2 has a bottom surface 21 and a side surface 22, the bottom surface 21 is provided at one end of the mandrel 1, and the side surface 22 of the cone head 2 can extend into the countersunk head 101 and fit with the inner wall of the countersunk head 101. The support 3 is slidably matched with the mandrel 1, and the support 3 has a reference surface 31, and the reference surface 31 is provided with a support foot 32, and the support foot 32 can fit with the mounting surface 200 as the support 3 moves.

[0033] The conical countersink auxiliary measuring device of the embodiment of the present invention can be used to set the push rod 1 along the central axis of the conical countersink 100 during measurement, and the cone head 2 can be inserted into the conical countersink 100 to make the side 22 fit the inner wall of the conical countersink 100; then the support 3 can be slid along the push rod 1 toward the mounting surface 200 where the conical countersink 100 is provided until the support leg 32 fits the mounting surface 200; then, the distance between the reference surface 31 and the mounting surface 200 can be measured by a measuring tool such as a vernier caliper; finally, the depth of the countersink 101 can be calculated by combining the geometric relationship between the height of the support leg 32, the angle between the generatrix of the bottom surface 21 and the side surface 22, the diameter of the bottom surface 21, and the inner diameter of the straight hole 102, which are determined in advance. Therefore, the depth of the countersink 101 does not need to be measured by repeatedly processing the test block, which simplifies the measurement operation, avoids the error caused by repeated processing, and improves the accuracy of the measurement result.

[0034] The following is a detailed description of the various components of the tapered countersink auxiliary measurement device:

[0035] like Figure 4 As shown, in one embodiment, the top rod 1 may be a cylindrical structure, but is not limited thereto, and may also be a prism or other structures.

[0036] like Figure 4 and Figure 5 As shown, in one embodiment, the cone head 2 may be a truncated cone structure, which may have a large end, a small end and a side wall, the end surface of the large end is a bottom surface 21, the bottom surface 21 is a plane, the side wall is a side surface 22, and the side surface 22 is a conical surface. Figure 2 As shown, the small end of the cone head 2 can extend into the countersunk head 101, and the side surface 22 can match and fit with the inner wall of the countersunk head 101. The diameter of the bottom surface 21 is larger than the maximum diameter of the countersunk head 101, that is, larger than the diameter of the edge of the countersunk head 101 on the mounting surface 200, so as to prevent the cone head 2 from completely extending into the interior of the countersunk head 101. Of course, the diameter of the bottom surface 21 can also be smaller than or equal to the maximum diameter of the countersunk head 101.

[0037] like Figure 2 As shown, the bottom surface 21 can be provided at one end of the mandrel 1 and is perpendicular to the mandrel 1, and the central axis of the cone head 2 is colinear with the axial line of the mandrel 1. At the same time, the cone head 2 and the mandrel 1 can be an integral structure, or can be connected in a detachable manner such as a snap connection or a threaded connection, so as to replace the cone head 2 with different tapers, so as to be used for conical countersunk holes 100 with different tapers. In other embodiments of the present invention, the cone head 2 can also be a conical structure, as long as it has a bottom surface 21 and a side surface 22, which will not be described in detail here.

[0038] like Figure 6 and Figure 7As shown, in one embodiment, the support 3 may have a reference surface 31, which is a plane and may be provided with a through hole 311. The shape and size of the through hole 311 may match the ejector pin 1 and may pass through the support 3 in a direction perpendicular to the reference surface 31. The ejector pin 1 may pass through the through hole 311, and the cone head 2 is located at one end of the ejector pin 1 that passes through the reference surface 31. At this time, the bottom surface 21 faces the reference surface 31, and the support 3 may reciprocate along the ejector pin 1.

[0039] The reference surface 31 may be provided with a support foot 32, which is located outside the cone head 2, so that the bottom surface 21 can be attached to or separated from the reference surface 31 without being blocked by the support foot 32. The surface of the support foot 32 close to the cone head 2 may be a curved surface, which may match the edge of the bottom surface 21. The bottom surface 21 may be attached to the reference surface 31, and when attached, the edge of the bottom surface 21 matches and fits the curved surface of the support foot 32. Of course, the surface of the support foot 32 close to the cone head 2 may also be a plane. At the same time, if Figure 2 As shown, the surface of the support leg 32 away from the reference surface 31 is a plane. When the cone head 2 extends into the conical countersunk hole 100 and the support 3 is sleeved on the top rod 1, the reference surface 31, the bottom surface 21 and the mounting surface 200 are parallel to each other. At this time, the support 3 can be moved toward the mounting surface 200 to fit the support leg 32 to the mounting surface 200.

[0040] The support leg 32 and the support base 3 may be an integrated structure, or may be fixedly connected by means of a clamping connection or the like. At the same time, the number of the support legs 32 may be two, and the two support legs 32 may be symmetrically distributed on both sides of the through hole 311, and the cone head 2 may be accommodated between the two support legs 32. Of course, the number of the support legs 32 may be one, three, or more.

[0041] The following is a description of the method for using the countersink auxiliary measurement device according to an exemplary embodiment of the present invention:

[0042] The height L of the support leg 32, the inner diameter d of the conical counterbore 100, the diameter D of the bottom surface 21 and the cone angle γ of the cone head 2 can be measured in advance. According to the cone angle γ and the geometric properties of the cone, the angle between the bottom surface 21 and the generatrix of the cone head 2 can be calculated. Angle is equal to the complementary angle of half the cone angle γ, that is Of course, the angle can also be measured directly

[0043] When measuring, the cone head 2 can be inserted into the countersunk head 101 of the conical countersunk hole 100, and then the support 3 can be slid along the top rod 1 toward the mounting surface 200 until the support leg 32 is in contact with the mounting surface 200, so that the reference surface 31 faces the mounting surface 200. At this time, the distance M between the reference surface 31 and the bottom surface 21 can be measured with a vernier caliper, and the height L of the support leg 32 is the distance between the bottom surface 21 and the reference surface 31.

[0044] like Figure 3 As shown, the depth U of the countersunk head 101, the distance M between the reference surface 31 and the bottom surface 21, the distance N between the bottom of the countersunk head 101 and the bottom surface 21, and the length L of the support leg 32 satisfy the following relationship:

[0045] U=M+N-L;

[0046] The distance N between the bottom of the countersunk head 101 and the bottom surface 21, the diameter of the bottom surface 21, the inner diameter of the straight hole 102, and the angle between the bottom surface 21 and the generatrix of the cone head 2 The following relations are satisfied:

[0047]

[0048] In summary, the relationship for calculating the depth U of the countersunk head 101 can be obtained:

[0049]

[0050] Therefore, in actual measurement, it is only necessary to measure the distance M between the reference surface 31 and the bottom surface 21, and then substitute the above-mentioned relationship for calculating the depth U of the countersunk head 101 into the relationship, so as to calculate the depth U of the countersunk head 101. There is no need to measure the depth of the countersunk head 101 by repeatedly processing the test block, so that the measurement operation can be simplified. At the same time, the error caused by repeated processing can be avoided, thereby improving the accuracy of the measurement result.

[0051] It should be understood that the present invention is not limited in its application to the detailed structure and arrangement of the components proposed in this specification. The present invention can have other embodiments and can be implemented and executed in a variety of ways. The aforementioned variations and modifications fall within the scope of the present invention. It should be understood that the present invention disclosed and defined in this specification extends to all alternative combinations of two or more individual features mentioned or evident in the text and / or the drawings. All these different combinations constitute multiple alternative aspects of the present invention. The embodiments described in this specification illustrate the best mode known for implementing the present invention and will enable those skilled in the art to utilize the present invention.

Claims

1. A conical countersink auxiliary measuring device for measuring the countersink depth of a conical countersink, wherein the conical countersink is opened on a mounting surface, characterized in that: The tapered counterbore auxiliary measuring device comprises: mandrel; A cone head having a bottom surface and a side surface, wherein the bottom surface is arranged at one end of the push rod, and the side surface can extend into the countersunk head and fit with the inner wall of the countersunk head; A support, slidably matched with the ejector rod, the support having a reference surface, the reference surface being provided with a support foot, the support foot being able to fit with the mounting surface as the support moves; Wherein, when the support leg is attached to the mounting surface and the side surface extends into the countersunk hole, the depth of the countersunk head, the distance between the bottom surface and the reference surface, the diameter of the bottom surface, the inner diameter of the conical countersunk hole, the angle between the generatrix of the bottom surface and the side surface, and the distance between the reference surface and the mounting surface satisfy the following relationship: U=M+(Dd) / 2×tanφ-L; Wherein, U is the depth of the countersunk head, M is the distance between the bottom surface and the reference plane, D is the outer diameter of the bottom surface, d is the inner diameter of the tapered countersunk hole, φ is the angle between the bottom surface and the generatrix of the side surface, and L is the distance between the reference plane and the mounting surface; The reference surface, the bottom surface and the mounting surface are all planes, and when the support legs are attached to the mounting surface and the side surfaces extend into the countersunk holes, the reference surface, the bottom surface and the mounting surface are parallel to each other.

2. The conical counterbore auxiliary measuring device according to claim 1, characterized in that: The support foot is located at the outer side of the cone head, and the surface of the support foot close to the cone head is a curved surface matching the edge of the bottom surface.

3. The conical counterbore auxiliary measurement device according to claim 2, characterized in that: The number of the supporting feet is two, and the two supporting feet are symmetrically distributed on both sides of the cone head.

4. The conical counterbore auxiliary measuring device according to claim 1, characterized in that: The reference surface is provided with a through hole, and the ejector rod passes through the through hole and is slidably fitted.

5. The conical counterbore auxiliary measuring device according to claim 1, characterized in that: The cone head is a cone structure or a truncated cone structure.

6. The conical counterbore auxiliary measurement device according to claim 1, characterized in that: The cone head and the push rod are an integrated structure.

7. The conical counterbore auxiliary measurement device according to claim 1, characterized in that: The cone head is detachably connected to the push rod.

8. The conical counterbore auxiliary measurement device according to claim 1, characterized in that: The support leg and the support base are an integrated structure.

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