A cone hole probe, a cone hole detection device and a detection method

Abstract

The application relates to a taper hole measuring head, a taper hole detection device and a detection method. The taper hole measuring head comprises a small-end measuring rod, a large-end measuring rod and an auxiliary measuring rod. The small-end measuring rod comprises a small-end detection end in the shape of a circular truncated cone with a taper smaller than that of a standard taper hole. The minimum outer diameter of the small-end detection end is smaller than the minimum inner diameter of the standard taper hole, and the maximum outer diameter is larger than the minimum inner diameter of the standard taper hole. The large-end measuring rod is coaxially sleeved outside the small-end measuring rod and comprises a large-end detection end in the shape of a circular truncated cone with a taper larger than that of the standard taper hole. The minimum outer diameter of the large-end detection end is smaller than the maximum inner diameter of the standard taper hole, and the maximum outer diameter is larger than the maximum inner diameter of the standard taper hole. The auxiliary measuring rod is coaxially sleeved outside the small-end measuring rod and located inside the large-end measuring rod in a tubular shape. The small-end measuring rod, the large-end measuring rod and the auxiliary measuring rod can relatively move along the axis of the small-end measuring rod. The application can detect the diameter error and the depth error of the large end and the small end of the measured taper hole in any case, and realizes the accurate detection of the taper hole of the measured part.

Description

Technical Field

[0001] This invention relates to the field of internal hole inspection technology for parts, specifically to a tapered hole probe, a tapered hole inspection device, and an inspection method. Background Technology

[0002] Splined shafts are often used in transmission structures to transmit torque. Some parts have a central tapered hole machined on their end face to mate with the tapered structure of the mating parts to achieve axial positioning and radial centering. The accuracy of the tapered hole directly affects the fitting accuracy between the parts.

[0003] The inspection of tapered holes on the end face of parts is usually carried out using a standard probe that is compatible with a standard tapered hole. The method is to insert the probe into the tapered hole to be tested and determine whether the tapered hole is qualified based on the depth to which the probe enters the tapered hole.

[0004] The main errors of the conical hole are the large end diameter, small end diameter, and depth deviation. When using a standard probe for inspection, in some cases where the conical hole is unqualified (e.g., the large end diameter and depth are qualified but the small end diameter is too large), the unqualified conical hole cannot be accurately detected based on the depth of the standard probe entering the conical hole being tested, which has certain limitations. Summary of the Invention

[0005] Based on the above description, the present invention provides a conical hole probe, a conical hole detection device, and a detection method to solve the problem of limitations of standard probes in related technologies.

[0006] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: Firstly, this application provides a tapered bore probe, the technical solution of which is as follows: A conical bore probe, comprising: The small-end measuring rod includes a small-end detection end, which is a frustum shape with a taper smaller than that of a standard conical hole. The minimum outer diameter of the small-end detection end is smaller than the minimum inner diameter of the standard conical hole, and the maximum outer diameter is larger than that of the standard conical hole. The large-end measuring rod is tubular and coaxially sleeved outside the small-end measuring rod. The end of the large-end measuring rod closest to the small-end detection end is the large-end detection end. The large-end detection end is a frustum shape with a taper greater than that of a standard conical hole. The diameters of the small-end detection end and the large-end detection end are in the same direction from small to large. The minimum outer diameter of the large-end detection end is smaller than the maximum inner diameter of the standard conical hole, and the maximum outer diameter is greater than the maximum inner diameter of the standard conical hole. An auxiliary measuring rod is tubular and coaxially sleeved outside the small-end measuring rod and located inside the large-end measuring rod. The small-end measuring rod, the large-end measuring rod, and the auxiliary measuring rod can move relative to each other along the axial direction of the small-end measuring rod.

[0007] Preferably, the outer edge of the auxiliary measuring rod near the small end of the detection end is rounded.

[0008] Secondly, this application provides a device for detecting tapered holes in parts, comprising: Base; A reference component is connected to the base, the reference component is movable relative to the base along a first linear direction, and the base is provided with a drive mechanism for driving the reference component to move. As described above, the tapered hole probe is connected to the reference member and the axis of the small end probe is parallel to the first straight line direction. The small end probe, the large end probe, and the auxiliary probe can move relative to the reference member along the axis of the small end probe. A detection component is disposed between the reference member and the tapered probe, and is used to detect the displacement of the small-end probe and the large-end probe relative to the reference member, and the displacement of the auxiliary probe relative to the large-end probe.

[0009] Preferably, a first elastic element is provided between the small end measuring rod and the reference member. When the small end measuring rod moves relative to the reference member from its initial position along the direction of increasing outer diameter of the small end detection end, it overcomes the elastic force of the first elastic element. A second elastic element is provided between the large-end measuring rod and the reference member. When the large-end measuring rod moves relative to the reference member from its initial position along the direction of increasing outer diameter of the large-end detection end, it overcomes the elastic force of the second elastic element. A third elastic element is provided between the auxiliary measuring rod and the large-end measuring rod. When the auxiliary measuring rod moves relative to the large-end measuring rod from its initial position relative to the large-end measuring rod in a direction from small to large outer diameter of the large-end detection end, it overcomes the elastic force of the third elastic element.

[0010] Preferably, the detection component includes a first length sensor and a second length sensor connected to the reference member, the axes of the first length sensor and the second length sensor are parallel to each other, and the first length sensor is coaxial with the small end measuring rod; The first length sensor is triggered when the small-end measuring rod moves relative to the reference piece from its initial position along the direction of increasing outer diameter of the small-end detection end; the second length sensor is triggered when the large-end measuring rod moves relative to the reference piece from its initial position along the direction of increasing outer diameter of the large-end detection end.

[0011] Preferably, the detection assembly further includes a third length sensor connected to the large-end measuring rod, the third length sensor being parallel to the first length sensor. The large-end measuring rod is provided with an axially extending guide groove. The auxiliary measuring rod is connected to a trigger element that extends through the guide groove to the outside of the large-end measuring rod. When the auxiliary measuring rod moves relative to the reference member from its initial position relative to the large-end measuring rod along the direction of increasing outer diameter of the large-end detection end, the trigger element triggers the third length sensor.

[0012] Preferably, the large end measuring rod is fitted with a mounting base, the third length sensor is connected to the mounting base, the second elastic element is disposed between the mounting base and the reference element, and the third elastic element is disposed between the trigger element and the mounting base.

[0013] Preferably, it further includes a support member connected to the base, the support member and the tapered hole probe being spaced apart in a first straight line direction, and both the small end detection end and the large end detection end facing the support member, the support member being used to support the part to be measured that is coaxial with the small end probe.

[0014] Thirdly, this application provides a method for detecting tapered holes, which uses the tapered hole detection device for parts as described above.

[0015] Compared with the prior art, the technical solution of this application has at least the following beneficial technical effects: 1. The conical hole probe of this application comprises a small-end probe, a large-end probe, and an auxiliary probe. The small-end probe's detection end can enter the conical hole and partially pass through the small end of the conical hole being tested. The large-end probe's detection end can partially pass through the large end of the conical hole being tested and enter the conical hole. The auxiliary probe's end near the small-end probe can enter the conical hole being tested and abut against the sidewall of the inner hole being tested. In actual testing, for a standard conical hole, the insertion depth of the small-end probe and the large-end probe into the standard conical hole is a standard value, and the axial position of the auxiliary probe relative to the large-end probe and the small-end probe is a standard position. For cases where the small-end diameter or depth of the taper hole being measured is too small or too large, the depth of the small-end measuring rod inserted into the taper hole can be compared with the standard value for detection. Whether the large-end diameter of the taper hole is qualified is determined by comparing the depth of the large-end measuring rod inserted into the taper hole with the standard value. If the taper hole depth is too large and the small-end diameter is too small, or vice versa, resulting in the small-end measuring rod insertion depth being within the qualified range, the detection can be based on the change in the axial position of the auxiliary measuring rod relative to the large-end or small-end measuring rod. Only when the depths of both the small-end and large-end measuring rods inserted into the standard taper hole are within the qualified range, and the axial position of the auxiliary measuring rod relative to the large-end or small-end measuring rod is within the qualified range, is the inner hole considered qualified; otherwise, the taper hole is considered unqualified. Therefore, regardless of the situation, the taper hole probe of this application can detect the large-end and small-end diameter errors and depth errors of the taper hole, achieving accurate detection of the taper hole in the measured part.

[0016] 2. The tapered hole detection device of this application, in use, fixes the base. The part to be tested is positioned with its axis coaxial with the small-end measuring rod and the tapered hole facing the small-end measuring rod, and is axially fixed. A driving mechanism drives a reference piece from its initial position to move closer to the part to be tested along the outer diameter of the small-end detection end from large to small, until the reference piece and the tapered hole end face of the part to be tested abut against each other. When the reference piece moves, the small-end measuring rod, the large-end measuring rod, and the auxiliary measuring rod move with the reference piece and insert into the tapered hole to be tested. The initial positions of the small-end measuring rod, the large-end measuring rod, and the auxiliary measuring rod are designed so that the small-end measuring rod, the large-end measuring rod, and the auxiliary measuring rod abut against the part to be tested axially before the reference piece and the part to be tested. That is, before the reference piece moves to abut against the tapered hole end face of the part to be tested, the small-end measuring rod, the large-end measuring rod, and the auxiliary measuring rod abut against the part to be tested. Thus, when the reference piece continues to move, the small-end measuring rod and the large-end measuring rod displace relative to the reference piece, while the auxiliary measuring rod displaces relative to the large-end measuring rod. The displacement is detected by the detection component. When the reference part reaches the position where it abuts against the end face of the tapered hole of the part being tested, the displacements of the small-end and large-end measuring rods relative to the reference part, as well as the displacement of the auxiliary measuring rod relative to the large-end measuring rod, detected by the detection assembly, are compared with their respective standard values. Only when all three displacement values ​​are within the acceptable range are the tapered holes judged to be qualified; otherwise, the tapered holes are judged to be unqualified. In this way, accurate detection of tapered holes can be achieved. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the part conical hole detection device provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the conical bore probe provided in an embodiment of the present invention; Figure 3 This is a schematic diagram illustrating the mating state between the tapered bore probe and the part being measured, as provided in an embodiment of the present invention. Figure 4 This is a schematic diagram of the structure of the tapered hole probe and detection assembly in the tapered hole detection device for parts provided in an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures: 1. Base; 2. Reference plate; 3. Drive cylinder; 4. Tapered hole probe; 41. Small end probe; 411. Small end detection end; 42. Large end probe; 421. Large end detection end; 422. Guide groove; 43. Auxiliary probe; 431. Trigger rod; 432. Support block; 5. Detection assembly; 51. First length sensor; 52. Second length sensor; 53. Third length sensor; 6. Mounting plate; 7. XY slide table; 8. First elastic element; 9. Second elastic element; 10. Third elastic element; 11. Mounting seat; 12. Limiting block; 13. Support component. Detailed Implementation

[0019] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0021] It is understood that spatial relation terms such as "below," "under," "below," "below," "above," "above," etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as "below" or "below" of the other element or feature will be oriented "above" the other element or feature. Therefore, the exemplary terms "below" and "below" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0022] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. In the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have the transmission of electrical signals or data between them.

[0023] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0024] Reference Figure 1 As shown in the figure, this application provides a part taper hole detection device, including a base 1, a reference component, a drive mechanism, a taper hole probe 4, and a detection component 5.

[0025] Reference Figure 1 As shown, the base 1 is used to fix the reference component on the testing table, the reference component is connected to the base 1 and can move relative to the base 1 along a first linear direction, and the driving mechanism is provided on the base 1 to drive the reference component to move. In this embodiment, the first linear direction is described as vertical.

[0026] Reference Figure 1 As shown, the movement of the reference component is limited and guided by the cooperation of the slide rail and the slider. The corresponding slide rail is vertically mounted on the base 1, and the reference component is connected to the slider. Specifically, an L-shaped mounting plate 6 is connected to the slider. The mounting plate 6 includes a horizontal part and a vertical part. The vertical part is fixed to the slider by bolts, and the reference component is connected to the horizontal part.

[0027] Reference Figure 1 As shown, the reference component is a reference plate 2, which is horizontally positioned below the horizontal portion of the mounting plate 6. The reference plate 2 and the mounting plate 6 are connected by an XY-axis slide 7. Specifically, the XY-axis slide 7 is mounted on the bottom surface of the horizontal portion of the mounting plate 6, and the reference plate 2 is connected to the sliding seat of the XY-axis slide 7 via a vertical connecting plate. The XY-axis slide 7 allows for fine-tuning of the horizontal position of the reference plate 2.

[0028] Reference Figure 1 As shown, the driving mechanism adopts a driving cylinder 3 mounted on the base 1, and the axis of the driving cylinder 3 is set vertically. In this embodiment, the driving cylinder 3 is set below the mounting plate 6.

[0029] Reference Figure 1-2 As shown, the conical hole probe 4 is connected to the reference piece. The conical hole probe 4 includes a small-end probe 41, a large-end probe 42, and an auxiliary probe 43. The small-end probe 41 includes a small-end detection end 411, which is a frustum shape with a taper smaller than that of a standard conical hole. The minimum outer diameter of the small-end detection end 411 is smaller than the minimum inner diameter of the standard conical hole, and the maximum outer diameter is larger than that of the standard conical hole. The large-end probe 42 is tubular and coaxially sleeved outside the small-end probe 41. The end of the large-end probe 42 closest to the small-end detection end 411 is the large-end detection end 421, which is a frustum shape with a taper larger than that of a standard conical hole. The diameters of the small-end detection end 411 and the large-end detection end 421 increase in the same direction. The minimum outer diameter of the large-end detection end 421 is smaller than the maximum inner diameter of the standard conical hole, and the maximum outer diameter is larger than that of the standard conical hole. The auxiliary measuring rod 43 is tubular and coaxially sleeved outside the small end measuring rod 41 and located inside the large end measuring rod 42. The small end measuring rod 41, the large end measuring rod 42 and the auxiliary measuring rod 43 can move relative to each other along the axial direction of the small end measuring rod 41.

[0030] Through this setting, refer to Figure 3As shown, the small-end detection end 411 of the small-end measuring rod 41 can enter the conical hole and partially pass through the small end of the conical hole being measured. The large-end detection end 421 of the large-end measuring rod 42 can partially pass through the large end of the conical hole being measured and enter the conical hole being measured. The end of the auxiliary measuring rod 43 near the small-end detection end 411 can enter the conical hole being measured and abut against the side wall of the inner hole being measured. In actual testing, for a standard conical hole, the insertion depth of the small-end measuring rod 41 and the large-end measuring rod 42 into the standard conical hole is the standard value, and the axial position of the auxiliary measuring rod 43 relative to the large-end measuring rod 42 and the small-end measuring rod 41 is the standard position. If the diameter of the small end of the tapered hole being tested is too small or too large, or the depth is too small or too large, the depth of the small end measuring rod 41 inserted into the tapered hole can be compared with the standard value to detect the problem. If the diameter of the large end of the tapered hole is qualified, it can be determined by comparing the depth of the large end measuring rod 42 inserted into the tapered hole with the standard value. If the depth of the tapered hole is too large and the diameter of the small end is too small, or the depth is too small and the diameter of the small end is too large, resulting in the insertion depth of the small end measuring rod 41 being within the qualified range, the problem can be detected by the change in the axial position of the auxiliary measuring rod 43 relative to the large end measuring rod 42 or the small end measuring rod 41. The inner hole being tested is considered qualified only when the depths of the small end measuring rod 41 and the large end measuring rod 42 inserted into the standard tapered hole are within the qualified range, and the axial position of the auxiliary measuring rod 43 relative to the large end measuring rod 42 or the small end measuring rod 41 is within the qualified range; otherwise, the tapered hole being tested is considered unqualified. Therefore, regardless of the circumstances, the diameter error and depth error of the large end and small end of the tapered hole being measured can be detected by the tapered hole probe 4, thus achieving accurate detection of the tapered hole of the part being measured.

[0031] Reference Figure 1-2 As shown, the outer diameter of the small-end measuring rod 41 is set to be the same as or slightly smaller than the inner diameter of the auxiliary measuring rod 43, and the outer diameter of the auxiliary measuring rod 43 is set to be the same as or slightly smaller than the inner diameter of the large-end measuring rod 42, so that they can move axially relative to each other and restrict radial relative movement. The diameters of both the small-end detection end 411 and the large-end detection end 421 gradually increase from one end to the other. The small-end detection end 411 is formed by chamfering the outer edge of the end of the small-end measuring rod 41, and the large-end detection end 421 is formed by chamfering the outer edge of the end of the large-end measuring rod 42. Therefore, the maximum diameter of the small-end detection end 411 is the outer diameter of the small-end measuring rod 41, and the maximum diameter of the large-end detection end 421 is the outer diameter of the large-end measuring rod 42.

[0032] Specifically, the axis of the small-end measuring rod 41 is parallel to the direction of the first straight line, that is, in this embodiment, the axis of the small-end measuring rod 41 is vertical. In this embodiment, the small-end detection end 411 and the large-end detection end 421 are arranged facing upwards for illustration and description. In this embodiment, the XY-direction slide 7 and the mounting plate 6 are provided with vertical through holes for mounting the conical hole probe 4. A guide sleeve with a vertical axis is provided in the through hole. The guide sleeve is fixedly connected to the sliding seat of the XY-direction slide 7, and the conical hole probe 4 is movably inserted into the guide sleeve.

[0033] Reference Figure 1 As shown, a contact block is mounted on the top of the mounting plate 6. The top surface of the contact block is horizontal, and the conical hole probe 4 passes through the contact block. When the reference piece is driven to move closer to the part being tested, the contact block moves with the reference piece until it abuts against the end face of the conical hole of the part being tested. Furthermore, a support member 13 is connected to the base 1. The support member 13 and the conical hole probe 4 are spaced apart in the first straight line direction, and both the small end detection end 411 and the large end detection end 421 face the support member 13. The support member 13 is used to support the part being tested, which is coaxial with the small end probe 41. Specifically, the support member 13 is a support bolt with its axis vertical and its head facing downward. The support bolt is located directly above the conical hole probe 4. After the part being tested is fed by the feeding mechanism in a vertical axis and with the conical hole facing downward, it is placed between the conical hole probe 4 and the support bolt. The drive mechanism then drives the reference piece and the conical hole probe 4 to move upward for testing. The part being tested is driven upward by the contact block until it abuts against the support bolt, at which point the reference piece reaches the end position.

[0034] During testing, the part to be tested is located directly above the conical hole probe 4, with its axis coaxial with the small end probe 41 and the conical hole to be tested facing downwards. The reference plate 2 is driven by the drive mechanism to move upwards and closer to the part to be tested from its initial position. When the reference plate moves, the small end probe 41, the large end probe 42, and the auxiliary probe 43 move with the reference plate and are inserted into the conical hole to be tested. The initial positions of the small-end measuring rod 41 and the large-end measuring rod 42 relative to the reference piece and the initial positions of the auxiliary measuring rod 43 relative to the large-end measuring rod are designed so that the small-end measuring rod 41, the large-end measuring rod 42 and the auxiliary measuring rod 43 abut against the axial direction of the contact block and the part being measured before the contact block moves to abut against the tapered end face of the part being measured. Thus, when the reference piece continues to move upward, the small-end measuring rod 41 and the large-end measuring rod 42 will be displaced relative to the reference piece, and the auxiliary measuring rod 43 will be displaced relative to the large-end measuring rod 42. The displacement is detected by the detection component 5. When the contact block and the tapered hole end face of the part being tested are pressed together, the reference component continues to move, driving the part being tested to press together with the support bolt. At this point, the reference component reaches its end position. The displacements of the small end measuring rod 41 and the large end measuring rod 42 relative to the reference component, and the displacement of the auxiliary measuring rod 43 relative to the large end measuring rod 42, detected by the detection component 5, are compared with their respective standard values. Only when all three displacement values ​​are within the acceptable range is the tapered hole judged to be a qualified tapered hole; otherwise, the tapered hole is judged to be unqualified. In this way, accurate detection of tapered holes can be achieved.

[0035] Reference Figure 2 As shown, the outer edge of the auxiliary measuring rod 43 near the small end detection end 411 is rounded to avoid the auxiliary measuring rod 43 contacting the inner wall of the measured conical hole and scratching the part.

[0036] Reference Figure 1 and Figure 4As shown, the conical probe 4 is located above the reference plate 2. A first elastic element 8 is provided between the small-end probe 41 and the reference piece. When the small-end probe 41 moves relative to the reference piece from its initial position along the direction of increasing outer diameter of the small-end detection end 411, it overcomes the elastic force of the first elastic element 8. A second elastic element 9 is provided between the large-end probe 42 and the reference piece. When the large-end probe 42 moves relative to the reference piece from its initial position along the direction of increasing outer diameter of the large-end detection end 421, it overcomes the elastic force of the second elastic element 9. A third elastic element 10 is provided between the auxiliary probe 43 and the large-end probe 42. When the auxiliary probe 43 moves relative to the large-end probe 42 from its initial position along the direction of increasing outer diameter of the large-end detection end 421, it overcomes the elastic force of the third elastic element 10.

[0037] Reference Figure 1 and Figure 4 As shown, when the first elastic element 8, the second elastic element 9, and the third elastic element 10 are all in an unstressed state, the small-end measuring rod 41 and the large-end measuring rod 42 are in their initial positions relative to the reference element, and the auxiliary measuring rod 43 is also in its initial position relative to the large-end measuring rod 42. When the small-end measuring rod 41, the large-end measuring rod 42, and the auxiliary measuring rod 43 are inserted into the tapered hole to be tested and moved to the axial direction to abut against the part to be tested, the small-end measuring rod 41 and the large-end measuring rod 42 are driven by the part to be tested to move downward relative to the reference element, and the auxiliary measuring rod 43 is driven by the part to be tested to move downward relative to the large-end measuring rod 42. During the design, the displacement data detected by the detection component 5 when testing the standard inner hole through the tapered hole measuring head 4 is used as the standard value, and the acceptable range is determined. When testing the tapered hole, the actual displacement data detected by the detection component 5 is compared with the standard value to determine whether the tapered hole is qualified.

[0038] Reference Figure 1 and Figure 4 As shown, the detection component 5 includes a first length sensor 51 and a second length sensor 52 connected to the reference component, and a third length sensor 53 connected to the large end measuring rod 42. The axes of the first length sensor 51, the second length sensor 52 and the third length sensor 53 are parallel to each other, and the first length sensor 51 is coaxial with the small end measuring rod 41.

[0039] When the small-end measuring rod 41 moves relative to the reference piece from its initial position along the direction of increasing outer diameter of the small-end detection end 411, it triggers the first length sensor 51. When the large-end measuring rod 42 moves relative to the reference piece from its initial position along the direction of increasing outer diameter of the large-end detection end 421, it triggers the second length sensor 52. That is, when the small-end measuring rod 41 and the large-end measuring rod 42 move downward relative to the reference piece, they trigger the first length sensor 51 and the second length sensor 52, respectively.

[0040] Reference Figure 2 and Figure 4As shown, the large-end measuring rod 42 is provided with an axially extending guide groove 422. The auxiliary measuring rod 43 is connected to a trigger element that extends through the guide groove 422 to the outside of the large-end measuring rod 42. When the auxiliary measuring rod 43 moves relative to the reference piece from its initial position relative to the large-end measuring rod 42, along the direction of increasing outer diameter of the large-end detection end 421, it triggers the third length sensor 53 through the trigger element. That is, the third length sensor 53 is triggered when the auxiliary measuring rod 43 moves vertically downward relative to the large-end measuring rod 42.

[0041] Therefore, by using length sensors to detect the displacement of the small-end measuring rod 41 and the large-end measuring rod 42 relative to the reference piece and the displacement of the auxiliary measuring rod 43 relative to the large-end measuring rod 42, the axial displacement of the small-end measuring rod 41, the large-end measuring rod 42 and the auxiliary measuring rod 43 caused by small errors in the tapered hole can be detected, which has high detection accuracy.

[0042] Reference Figure 1 and Figure 4 As shown, a mounting base 11 is fitted over the large-end measuring rod 42. The third length sensor 53 is connected to the mounting base 11. The second elastic element 9 is located between the mounting base 11 and the reference element, and the third elastic element 10 is located between the trigger element and the mounting base 11. Specifically, the first length sensor 51 and the second length sensor 52 are both mounted on and fixed to the reference plate 2, and are spaced apart in the horizontal direction. The mounting base 11 is located below the trigger element, and the third length sensor 53 is mounted on and fixed to the mounting base 11.

[0043] Reference Figure 1 and Figure 4 As shown, the first elastic element 8, the second elastic element 9, and the third elastic element 10 are all compression springs. The first elastic element 8 is coaxially sleeved outside the first length sensor 51. The lower end of the small end measuring rod 41 extends out of the large end measuring head and is connected to a limiting block 12 sleeved outside the small end measuring rod 41. The two ends of the first elastic element 8 abut against the limiting block 12 and the reference plate 2, respectively. The second elastic element 9 is coaxially sleeved outside the second length sensor 52, and its two ends abut against the mounting base 11 and the reference plate 2, respectively. The trigger element is a trigger rod 431. One end of the trigger rod 431 located outside the large end measuring rod 42 is connected to a support block 432. The third elastic element 10 is coaxially sleeved outside the third length sensor 53, and its two ends abut against the mounting base 11 and the support block 432, respectively.

[0044] This embodiment also provides a method for detecting tapered holes using the aforementioned tapered hole detection device.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A conical bore probe, characterized in that, include: The small end measuring rod (41) includes a small end detection end (411), which is a frustum shape with a taper smaller than that of a standard conical hole. The minimum outer diameter of the small end detection end (411) is smaller than the minimum inner diameter of the standard conical hole, and the maximum outer diameter is greater than that of the standard conical hole. The large end measuring rod (42) is tubular and coaxially sleeved outside the small end measuring rod (41). The end of the large end measuring rod (42) near the small end detection end (411) is the large end detection end (421). The large end detection end (421) is a frustum shape with a taper greater than that of a standard conical hole. The diameters of the small end detection end (411) and the large end detection end (421) are in the same direction from small to large. The minimum outer diameter of the large end detection end (421) is smaller than the maximum inner diameter of the standard conical hole, and the maximum outer diameter is greater than the maximum inner diameter of the standard conical hole. The auxiliary measuring rod (43) is coaxially sleeved in a tubular shape outside the small end measuring rod (41) and inside the large end measuring rod (42). The small end measuring rod (41), the large end measuring rod (42) and the auxiliary measuring rod (43) can move relative to each other along the axial direction of the small end measuring rod (41). During testing, the part to be tested is positioned such that its axis is coaxial with the small end measuring rod (41) and the conical hole to be tested faces the small end measuring rod (41). The small end measuring rod (41), the large end measuring rod (42), and the auxiliary measuring rod (43) are inserted into the conical hole to be tested. Based on the depth of the small end measuring rod (41) inserted into the conical hole to be tested, the depth of the large end measuring rod (42) inserted into the conical hole to be tested, and the axial position of the auxiliary measuring rod (43) relative to the large end measuring rod (42) / the small end measuring rod (41), it is determined whether the inner hole to be tested is qualified. The inner hole being tested is considered qualified when the depth of the small end measuring rod (41) and the large end measuring rod (42) inserted into the conical hole being tested is within the qualified range, and the axial position of the auxiliary measuring rod (43) relative to the large end measuring rod (42) / the small end measuring rod (41) is within the qualified range; otherwise, the conical hole being tested is unqualified.

2. The tapered bore probe according to claim 1, characterized in that: The outer edge of the auxiliary measuring rod (43) near the small end detection end (411) is rounded.

3. A device for detecting conical holes in parts, characterized in that, include: Base (1); A reference member is connected to the base (1), the reference member can move relative to the base (1) along a first straight direction, and the base (1) is provided with a driving mechanism for driving the reference member to move; The tapered hole probe (4) as described in any one of claims 1-2 is connected to the reference member and the axis of the small end probe (41) is parallel to the first straight line direction. The small end probe (41), the large end probe (42) and the auxiliary probe (43) can move relative to the reference member along the axis of the small end probe (41). The detection component (5) is located between the reference member and the tapered probe (4) and is used to detect the displacement of the small end probe (41) and the large end probe (42) relative to the reference member, and the displacement of the auxiliary probe (43) relative to the large end probe (42).

4. The part taper hole detection device according to claim 3, characterized in that: A first elastic element (8) is provided between the small end measuring rod (41) and the reference member. When the small end measuring rod (41) moves relative to the reference member from its initial position along the direction of increasing outer diameter of the small end detection end (411), it overcomes the elastic force of the first elastic element (8). A second elastic element (9) is provided between the large end measuring rod (42) and the reference member. When the large end measuring rod (42) moves relative to the reference member from its initial position along the direction of increasing outer diameter of the large end detection end (421), it overcomes the elastic force of the second elastic element (9). A third elastic element (10) is provided between the auxiliary measuring rod (43) and the large end measuring rod (42). When the auxiliary measuring rod (43) moves relative to the large end measuring rod (42) from its initial position relative to the large end measuring rod (42) along the direction of increasing outer diameter of the large end detection end (421), it overcomes the elastic force of the third elastic element (10).

5. The part taper hole detection device according to claim 4, characterized in that: The detection component (5) includes a first length sensor (51) and a second length sensor (52) connected to the reference piece. The axes of the first length sensor (51) and the second length sensor (52) are parallel to each other, and the first length sensor (51) is coaxial with the small end measuring rod (41). When the small end measuring rod (41) moves relative to the reference piece from its initial position along the direction of increasing outer diameter of the small end detection end (411), it triggers the first length sensor (51); when the large end measuring rod (42) moves relative to the reference piece from its initial position along the direction of increasing outer diameter of the large end detection end (421), it triggers the second length sensor (52).

6. The part taper hole detection device according to claim 5, characterized in that: The detection assembly (5) further includes a third length sensor (53) connected to the large end measuring rod (42). The third length sensor (53) is parallel to the first length sensor (51). The large end measuring rod (42) is provided with an axially extending guide groove (422). The auxiliary measuring rod (43) is connected to a trigger that extends through the guide groove (422) to the outside of the large end measuring rod (42). When the auxiliary measuring rod (43) moves relative to the reference member from its initial position relative to the large end measuring rod (42) along the direction of increasing outer diameter of the large end detection end (421), the trigger triggers the third length sensor (53).

7. The part taper hole detection device according to claim 6, characterized in that: The large end measuring rod (42) is fitted with a mounting base (11), the third length sensor (53) is connected to the mounting base (11), the second elastic member (9) is located between the mounting base (11) and the reference member, and the third elastic member (10) is located between the trigger member and the mounting base (11).

8. The part taper hole detection device according to claim 3, characterized in that: It also includes a support member (13) connected to the base (1), the support member (13) and the tapered hole probe (4) are spaced apart in the first straight direction, and the small end detection end (411) and the large end detection end (421) are both facing the support member (13), the support member (13) is used to support the part to be measured that is coaxial with the small end probe (41).

9. A method for detecting a conical hole, characterized in that: The part taper hole inspection device as described in any one of claims 3-8 is used for inspection.

Images