A profile quick measurement gauge

Abstract

The utility model relates to a profile gauge, concretely is a profile fast measurement gauge, to solve for the larger size gear ring, adopt the existing arc slot profile detection method, in batch processing, there is processing, and the technical problem of difficult to detect, moreover, low efficiency. The utility model discloses V type block, connecting block and measuring pin, be provided with V shape mouth on V type block, and the two side walls of V shape mouth respectively are provided with first datum plane and second datum plane, and connecting block fixedly connected in V type block one side, measuring pin has the measurement section and the cooperation section of connection, the cooperation section movably connects on connecting block, and the center axis of measurement section extends along the thickness direction of V type block, and measurement section includes stop section and passage section, and stop section connects between passage section and cooperation section, define the radius of arc slot as R1, length is L1, and the upper deviation of profile is a, and the lower deviation is b, and the radius of stop section is R2, and the radius of passage section is R3, length is L2, R2=R1+a, R3=R1+b, L2=L1.

Description

Technical Field

[0001] This utility model relates to a profile measurement tool, specifically a rapid profile measurement tool. Background Technology

[0002] Figure 1 The image shows a gear ring 01 measured by a rapid profile measurement fixture of this invention. The outer circumference of the gear ring 01 has three arc grooves 02. The profile of the arc grooves 02 is an important indicator of the quality of the gear ring 01. Typically, after the gear ring 01 is machined, the profile of the arc grooves 02 needs to be measured. (See also...) Figure 1 , Figure 2 The detection benchmark for the profile of the arc groove 02 is usually the maximum outer circle surface of the gear ring 01 and one end face of the gear ring 01. It is required that the profile detection of the arc groove 02 must be carried out when the gear ring 01 is expanded to a roundness within 0.05.

[0003] In the existing technology, the method for detecting the contour of the arc groove 02 is as follows: a dedicated inspection mandrel is designed and manufactured before inspection. During inspection, the manufactured gear ring 01 is expanded to a roundness within 0.05 using the inspection mandrel. Then, a coordinate measuring machine is used to scan and obtain the contour of the arc groove 02. For gear rings 01 with larger dimensions, the total weight of the gear ring 01 plus the inspection mandrel is too large (for example, for a gear ring with a diameter φ of 435.5mm, the diameter of its inspection mandrel is 370mm, and the total weight of the gear ring plus the inspection mandrel is about 80KG), making it impossible for a single person to process and submit for inspection. This inspection method can be barely implemented for individual samples, but in batch processing, the difficulty of processing and submission for inspection is too great, and the efficiency is low.

[0004] Chinese utility model patent CN210220933U discloses a contour measurement tool, including a base, a curved protrusion on the base, and a detection groove on the base. The base comprises a triangular support and an arc-shaped support; a mounting block is provided on the triangular support, and a go gauge and a no-go gauge are provided on the arc-shaped support. The curved protrusion is located at the center of the triangular support and conforms to the concave contour of the workpiece being measured. The detection groove is located on the triangular support and distributed circumferentially along it, and the detection groove has a triangular structure. This utility model enables rapid contour measurement of workpieces with high accuracy and efficiency, while reducing labor costs.

[0005] Chinese utility model patent CN210664196U discloses a contour measurement fixture, including a fixture body, which is a solid structure. The fixture body has a through groove for accommodating products, and the through groove is arc-shaped with uniform thickness from the opening to the bottom. A large slot, which is cubic in shape and wider than the through groove, is provided in the middle of the through groove for easy product removal. The four corners of the large slot are rounded. This fixture is simple and suitable for measuring the contour of products with arc-shaped surface structures. The size and curvature of the fixture can be adjusted according to the size and curvature of the product, allowing for quick and convenient contour measurement, improving testing speed, and reducing labor costs.

[0006] However, the contour measurement tools disclosed in the two patents mentioned above are not applicable to... Figure 1 The profile of the circular arc groove 02 on the outer circle of the toothed ring 01 is detected. Utility Model Content

[0007] The purpose of this invention is to solve the technical problems of excessive processing and inspection difficulties and low efficiency in the production of large-sized gear rings using existing circular arc groove contour detection methods during batch processing, and to provide a rapid contour measurement tool.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0009] A rapid profile measurement fixture, characterized by the following features:

[0010] Includes V-blocks, connecting blocks, and measuring pins;

[0011] The V-shaped block is provided with a V-shaped opening that penetrates the V-shaped block along the thickness direction. A first reference surface and a second reference surface are respectively provided on the two side walls of the V-shaped opening along the width direction of the V-shaped block. The first reference surface and the second reference surface are used to abut against the outer circle of the gear ring to be tested during measurement.

[0012] The connecting block is fixedly connected to one side of the V-block along the thickness direction of the V-block;

[0013] The measuring pin has a measuring section and a mating section that are connected;

[0014] The mating section is movably connected to the connecting block along the thickness direction of the V-block. The measuring section is located on the side of the connecting block closer to the V-block. The central axis of the measuring section extends along the thickness direction of the V-block and is located on the midpoint between the first and second reference planes of the V-shaped opening. During measurement, it is coaxial with the central axis of the arc groove to be measured on the outer circle of the gear ring.

[0015] The measuring section includes a stop section and a through section that are coaxially arranged and both are cylindrical, with the stop section connecting the through section and the mating section;

[0016] Definition: The radius of the arc groove to be measured is R1, the length of the arc groove is L1, the upper deviation of the arc groove profile is a, the lower deviation is b, the radius of the stop section is R2, the radius of the through section is R3, and the length of the through section is L2. Then we have: R2 = R1 + a, R3 = R1 + b, L2 ≥ L1.

[0017] Furthermore, the V-block is provided with a fixing part for fixed connection with the connecting block, and a first positioning arm and a second positioning arm symmetrically connected to the fixing part;

[0018] A V-shaped opening is formed between the first positioning arm and the second positioning arm. The first reference surface is set on the side of the first positioning arm that is close to the second positioning arm, and the second reference surface is set on the side of the second positioning arm that is close to the first positioning arm.

[0019] Furthermore, it also includes a pair of cylindrical pins, a pair of first pin holes on the connecting block, and a pair of second pin holes at corresponding positions on the fixing part. The pair of cylindrical pins are inserted into the pair of second pin holes after passing through the pair of first pin holes respectively.

[0020] Furthermore, it also includes a bushing fixedly connected to the connecting block, the bushing having a through hole, the central axis of the through hole extending along the thickness direction of the V-shaped block, the mating section slidingly passing through the through hole along the central axis direction of the through hole, and the central axis of the measuring section being coaxial with the central axis of the through hole.

[0021] Furthermore, the connecting block is detachably connected to the V-block by a plurality of first screws, and the mounting boss on the bushing is detachably connected to the connecting block by a plurality of second screws.

[0022] Furthermore, the assembly clearance between the mating section and the through hole is ≤0.008mm.

[0023] Furthermore, a handle is installed on the end of the section away from the measuring section.

[0024] Furthermore, the included angle between the first datum plane and the second datum plane is 124°, with a tolerance of ±0.1°.

[0025] The advantages of this utility model compared to the prior art are:

[0026] 1. This utility model provides a rapid contour measurement fixture, comprising a V-block, a connecting block, and a measuring pin. The V-block has a V-shaped opening that penetrates the V-block along its thickness direction. A first reference surface and a second reference surface are respectively provided on the two side walls of the V-shaped opening along the width direction of the V-block. The first and second reference surfaces are used to abut against the outer circle of the gear ring to be measured during measurement. The connecting block is fixedly connected to one side of the V-block along its thickness direction. The measuring pin has a connected measuring section and a... The mating section is movably connected to the connecting block along the thickness direction of the V-block. The measuring section is located on the side of the connecting block closer to the V-block. The central axis of the measuring section extends along the thickness direction of the V-block and is located on the midpoint between the first and second reference planes of the V-shaped opening. During measurement, it is coaxial with the central axis of the arc groove to be measured on the outer circle of the gear ring. The measuring section includes a stop section and a through section, both coaxially arranged and cylindrical. The stop section connects the through section and the mating section. The radius R2 of the stop section is equal to the radius R of the arc groove. The upper deviation of the arc groove profile is 1+a, the radius of the through section is R3 = the radius of the arc groove R1+b, the length of the through section is L2≥ the length of the arc groove is L1. This allows the first and second reference surfaces of the rapid profile measurement fixture to be placed against the outer circle of the gear ring to be tested during inspection. After aligning the central axis of the measuring section with the central axis of the arc groove to be measured on the outer circle of the gear ring, the profile of the arc groove can be determined by moving the measuring pin. This method is not only convenient and quick to operate, but also allows the rapid profile measurement fixture of this invention to directly measure the arc groove profile on the outer circle of the gear ring on the machine tool while the gear ring is still under tension (roundness within 0.05) after milling. This not only saves the clamping and verification of the inspection mandrel during testing, reducing the labor intensity of the operator, but also saves the clamping and verification time of the inspection mandrel and the time for the coordinate measuring machine to measure the profile, thus improving processing efficiency.

[0027] 2. The contour measurement fixture of this utility model can reduce the processing difficulty of the fixture by setting a bushing;

[0028] 3. The contour measurement tool of this utility model is designed to facilitate the replacement of worn parts after wear occurs by setting a connecting block that is detachably connected to a V-block by multiple first screws and a bushing that is detachably connected to the connecting block by multiple second screws. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the gear ring to be tested;

[0030] Figure 2 This is a schematic diagram of the structure of the arc groove on the gear ring to be tested.

[0031] Figure 3 This is a top view schematic diagram of an embodiment of a contour measurement fixture of the present invention;

[0032] Figure 4 for Figure 3 View B in the middle;

[0033] Figure 5 for Figure 4 The C-direction view in the image.

[0034] The annotations in the attached figures are explained as follows:

[0035] 01-Gear ring, 02-Circular arc groove;

[0036] 1-V-block, 11-fixed part, 12-first positioning arm, 13-second positioning arm, 14-V-shaped opening, 2-connecting block, 3-second screw, 4-bushing, 41-through hole, 5-measuring pin, 51-measuring section, 511-stop section, 512-through section, 52-fitting section, 6-cylindrical pin, 7-first screw, 8-handle, M-first reference surface, N-second reference surface. Detailed Implementation

[0037] To make the objectives, advantages and features of this utility model clearer, the following describes in further detail a contour measurement tool proposed by this utility model in conjunction with the accompanying drawings and specific embodiments.

[0038] In the description of this utility model, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] Reference Figure 3 and Figure 4 This utility model discloses a rapid contour measurement fixture, which is suitable for detecting the contour of the arc groove on the outer circle of an easily deformable gear ring. It includes a V-block 1, a connecting block 2, and a measuring pin 5.

[0040] like Figure 3 As shown, a V-shaped opening 14 is provided on the V-block 1, penetrating the V-block 1 along its thickness direction. A first reference surface M and a second reference surface N are respectively provided on the two side walls of the V-shaped opening 14 along the width direction of the V-block 1. The first reference surface M and the second reference surface N are used to abut against the outer circle of the gear ring 01 to be measured during measurement. Figure 3 and Figure 5As shown, the V-block 1 is provided with a fixing part 11 for fixed connection with the connecting block 2, and a first positioning arm 12 and a second positioning arm 13 symmetrically connected to the fixing part 11. A V-shaped opening 14 is formed between the first positioning arm 12 and the second positioning arm 13. A first reference surface M is provided on the side of the first positioning arm 12 near the second positioning arm 13, and a second reference surface N is provided on the side of the second positioning arm 13 near the first positioning arm 12. The included angle between the first reference surface M and the second reference surface N is 124°, with a tolerance of ±0.1°. During measurement, the first reference surface M and the second reference surface N respectively abut against the outer circle of the gear ring 01 to be tested. The first reference surface M and the second reference surface N respectively contact the outer circle line of the gear ring 01, thus transferring the maximum outer circle surface of the gear ring 01 in the detection reference of the arc groove 02 profile to the V-block 1.

[0041] like Figure 3 and Figure 4 As shown, the connecting block 2 is fixedly connected to one side of the V-block 1 along the thickness direction of the V-block 1; the measuring pin 5 has a measuring section 51 and a mating section 52 connected together. The mating section 52 is movably connected to the connecting block 2 along the thickness direction of the V-block 1. The measuring section 51 is located on the side of the connecting block 2 close to the V-block 1. The central axis of the measuring section 51 extends along the thickness direction of the V-block 1, and the central axis of the measuring section 51 is located on the midpoint between the first reference plane M and the second reference plane N of the V-shaped opening 14. Furthermore, during measurement, the central axis of the measuring section 51 is aligned with the outer circle of the gear ring 01 to be measured. The central axis of the arc groove 02 is coaxial; the measuring section 51 includes a stop section 511 and a through section 512, which are coaxially arranged and both cylindrical. The stop section 511 is connected between the through section 512 and the mating section 52. Definition: The radius of the arc groove 02 to be measured is R1, the length of the arc groove 02 is L1, the upper deviation of the arc groove 02 profile is a, the lower deviation of the arc groove 02 profile is b, the radius of the stop section 511 is R2, the radius of the through section 512 is R3, and the length of the through section 512 is L2. Then: R2 = R1 + a, R3 = R1 + b, L2 ≥ L1. The measuring section 51 adopts a two-section design. During the test, by moving the measuring pin 5, the through section 512 and the stop section 511 of the measuring pin 5 are respectively inspected by the arc groove 02. If the through section 512 can pass through the arc groove 02 and the stop section 511 is blocked by the arc groove 02, it indicates that the arc groove 02 is qualified. If the through section 512 cannot pass through the arc groove 02 or the stop section 511 can pass through the arc groove 02, it indicates that the arc groove 02 is unqualified. The operation is convenient and quick.

[0042] like Figure 3 and Figure 4As shown, to reduce the processing difficulty of the inspection tool, the present invention provides a rapid contour measurement inspection tool, which also includes a bushing 4 fixedly connected to the connecting block 2. The bushing 4 is installed in the mounting hole on the connecting block 2, and a through hole 41 is provided on the bushing 4. The central axis of the through hole 41 extends along the thickness direction of the V-shaped block 1. The mating section 52 slides through the through hole 41 along the central axis direction. The central axis of the measuring section 51 is coaxial with the central axis of the through hole 41. The dimension between the intersection of the plane containing the first reference plane M and the plane containing the second reference plane N and the central axis of the through hole 41 is 28.87 mm, with a tolerance of ±0.01 mm. This dimension is determined by several characteristic dimensions, including the included angle between the first reference plane M and the second reference plane N, the outer diameter of the gear ring 01 to be inspected, and the center of the arc groove 02 on the outer circle of the gear ring 01. Figure 5 The first datum plane M and the second datum plane N are used as datum A. The symmetry tolerance of the central axis of the through hole 41 relative to datum A is 0.02mm. In order to ensure the detection accuracy while minimizing the difficulty of the inspection tooling, the mating section 52 of the measuring pin 5 and the through hole 41 of the bushing 4 need to be machined to ensure that the assembly clearance between the mating section 52 and the through hole 41 is ≤0.008mm.

[0043] like Figure 3 As shown, the connecting block 2 is detachably connected to the V-block 1 by multiple first screws 7, and the mounting boss on the bushing 4 is detachably connected to the connecting block 2 by multiple second screws 3. This detachable connection method facilitates the replacement of worn parts, helping to ensure testing accuracy.

[0044] like Figure 3 and Figure 5 As shown, the contour measurement fixture of this utility model also includes a pair of cylindrical pins 6. A pair of first pin holes are provided on the connecting block 2, with the central axes of both first pin holes extending along the thickness direction of the V-block 1. A pair of second pin holes are provided at corresponding positions on the fixing part 11, with the central axes of both second pin holes extending along the thickness direction of the V-block 1. The pair of cylindrical pins 6 pass through the pair of first pin holes and are then inserted into the pair of second pin holes. The provision of the pair of cylindrical pins 6 helps to improve the assembly accuracy of the connecting block 2 and the V-block 1, thereby helping to ensure the detection accuracy.

[0045] like Figure 4 As shown, in order to facilitate the operation of the measuring pin 5, a handle 8 is installed on the end of the mating section 52 away from the measuring section 51.

[0046] When machining the arc grooves 02 on the gear ring 01 using milling, the gear ring 01 is horizontally clamped on the machine tool fixture. After machining the three arc grooves 02 on the gear ring 01, the gear ring 01 is not immediately released from the machine tool fixture. At this time, the gear ring 01 is in a taut state on the machine tool fixture (roundness within 0.05), which meets the requirement that the arc groove 02 contour measurement must be performed when the gear ring 01 is taut to a roundness within 0.05. The contour measurement fixture of this utility model can take advantage of the fact that the gear ring 01 is in a taut state on the machine tool fixture (roundness within 0.05) at this time, and directly measure the contour of the arc grooves 02 on the outer circle of the gear ring 01 on the machine tool. During the measurement, the contour measurement fixture of this utility model is first placed on the machine tool, and the first reference surface M and the second reference surface N are respectively abutted against the part to be measured. On the outer circle of the gear ring 01, the measuring pin 5 is positioned above the arc groove 02 to be inspected. Then, the position of the contour measurement fixture is finely adjusted so that the central axis of the measuring pin 5 is aligned with the central axis of the arc groove 02 to be inspected. After that, by pulling and pressing the handle 8, the through section 512 and the stop section 511 of the measuring pin 5 are inspected for the arc groove 02. If the through section 512 can pass through the arc groove 02 and the stop section 511 is stuck by the arc groove 02, it indicates that the arc groove 02 is qualified. If the through section 512 cannot pass through the arc groove 02 or the stop section 511 can pass through the arc groove 02, it indicates that the arc groove 02 is unqualified. After that, the contour of the remaining two arc grooves 02 on the gear ring 01 is measured in the same way. After the contour of the three arc grooves 02 has been inspected, the gear ring 01 is removed and the next round of processing begins. This utility model provides a rapid contour measurement fixture that can directly measure the contour of the arc groove 02 on the outer circle of the gear ring 01 on the machine tool after milling and while the gear ring 01 is still under tension (roundness within 0.05) on the machine tool fixture. This not only saves the clamping and verification of the inspection mandrel during delivery and reduces the labor intensity of the operator, but also saves the clamping and verification time of the inspection mandrel during delivery and the time of the coordinate measuring machine to measure the contour, thus improving processing efficiency.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the specific technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of this utility model.

Claims

1. A rapid profile measurement fixture, characterized in that: It includes a V-block (1), a connecting block (2), and a measuring pin (5); The V-shaped block (1) is provided with a V-shaped opening (14), which penetrates the V-shaped block (1) along the thickness direction. A first reference surface (M) and a second reference surface (N) are respectively provided on the two side walls of the V-shaped opening (14) along the width direction of the V-shaped block (1). The first reference surface (M) and the second reference surface (N) are used to abut against the outer circle of the gear ring (01) to be tested during measurement. The connecting block (2) is fixedly connected to one side of the V-block (1) along the thickness direction of the V-block (1); The measuring pin (5) has a measuring section (51) and a mating section (52) connected to each other; The mating section (52) is movably connected to the connecting block (2) along the thickness direction of the V-block (1). The measuring section (51) is located on the side of the connecting block (2) close to the V-block (1). The central axis of the measuring section (51) extends along the thickness direction of the V-block (1) and is located on the midpoint between the first reference plane (M) and the second reference plane (N) of the V-shaped opening (14). During measurement, it is coaxial with the central axis of the arc groove (02) to be measured on the outer circle of the gear ring (01). The measuring section (51) includes a stop section (511) and a through section (512) that are coaxially arranged and both cylindrical, and the stop section (511) is connected between the through section (512) and the mating section (52). Definition: The radius of the arc groove (02) to be measured is R1, the length of the arc groove (02) is L1, the upper deviation of the arc groove (02) profile is a, the lower deviation is b, the radius of the stop section (511) is R2, the radius of the through section (512) is R3, and the length of the through section (512) is L2. Then we have: R2 = R1 + a, R3 = R1 + b, L2 ≥ L1.

2. The contour measurement fixture according to claim 1, characterized in that: The V-shaped block (1) is provided with a fixing part (11) for fixed connection with the connecting block (2), and a first positioning arm (12) and a second positioning arm (13) symmetrically connected to the fixing part (11); The V-shaped opening (14) is formed between the first positioning arm (12) and the second positioning arm (13). The first reference surface (M) is disposed on the side of the first positioning arm (12) near the second positioning arm (13), and the second reference surface (N) is disposed on the side of the second positioning arm (13) near the first positioning arm (12).

3. The contour measurement fixture according to claim 2, characterized in that: It also includes a pair of cylindrical pins (6), the connecting block (2) is provided with a pair of first pin holes, and the fixing part (11) is provided with a pair of second pin holes at corresponding positions. The pair of cylindrical pins (6) are inserted into the pair of second pin holes after passing through the pair of first pin holes respectively.

4. The contour measurement fixture according to any one of claims 1-3, characterized in that: It also includes a bushing (4) fixedly connected to the connecting block (2), the bushing (4) having a through hole (41), the central axis of the through hole (41) extending along the thickness direction of the V-shaped block (1), the mating section (52) slidingly passing through the through hole (41) along the central axis direction of the through hole (41), and the central axis of the measuring section (51) being coaxial with the central axis of the through hole (41).

5. The contour measurement fixture according to claim 4, characterized in that: The connecting block (2) is detachably connected to the V-block (1) by a plurality of first screws (7), and the mounting boss on the bushing (4) is detachably connected to the connecting block (2) by a plurality of second screws (3).

6. The contour measurement fixture according to claim 4, characterized in that: The assembly gap between the mating section (52) and the through hole (41) is ≤0.008mm.

7. The contour measurement fixture according to claim 1, characterized in that: A handle (8) is installed on the end of the mating section (52) away from the measuring section (51).

8. The contour measurement fixture according to claim 1, characterized in that: The included angle between the first reference plane (M) and the second reference plane (N) is 124°, with a tolerance of ±0.1°.

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