Measuring tool for measuring size of groove to be measured and use method of measuring tool

Abstract

The invention discloses a measuring tool for measuring the size of a to-be-measured groove and a use method thereof, the measuring tool comprises a first positioning seat and a second positioning seat which are connected through a cross beam, and a to-be-measured part placed below the first positioning seat and the second positioning seat, and the to-be-measured part is provided with the to-be-measured groove; the first positioning seat is connected with a sliding rod through an elastic mechanism, the tail end of the sliding rod is provided with a measuring pin, and the measuring pin extends into the groove to be measured; an extension part is arranged on the side wall of the sliding rod, a dial indicator is arranged on the cross beam, and a pointer of the dial indicator is matched with the extension part. And the positioning blocks at the two ends are directly lapped on the measuring basis of the part by connecting the cross beam, so that the stability in the measuring process is ensured. And a measuring pin structure is arranged in the detection module, so that the measuring direction is converted, the other surface of the size of the cavity is directly contacted, and direct measurement in the measuring process is ensured. An indirect measurement method in previous machining is improved, errors existing in indirect measurement are reduced, and the detection efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of part detection gauges, in particular to a gauge for measuring the size of a to-be-measured groove and a use method thereof. BACKGROUND

[0002] In the measurement process of a flight part, if the size of the to-be-measured groove cavity of the part is the axial size between the inner end face of the to-be-measured groove and the outer end face of the part rim, as shown in Figure 2 the size A is the distance between the two end faces, and the two end faces are not on the same straight line, but are the distance between the two planes distributed on two structures.

[0003] The size precision requirement is high, and before improvement, the size cannot be directly measured, and two sizes need to be indirectly measured and calculated through indirect conversion. Such a measurement method has two problems, on the one hand, the accuracy of measurement will be affected, since the measurement process involves one more size, the error will increase, increasing the risk of part size out of tolerance, on the other hand, the efficiency of measurement will be affected, since the size cannot be directly detected, the measurement process is more, and the detection of one size also needs to be calculated, and the detection efficiency is affected. SUMMARY

[0004] The present application provides a gauge for measuring the size of a to-be-measured groove and a use method thereof, to solve the problem that the cavity space is narrow and the measured size is the size between two different structures, which is difficult to directly measure. The gauge manufactured by the technical solution can realize direct size measurement, ensure the accuracy of measurement, improve the use performance of the part, and the measurement process is stable, reliable and fast.

[0005] To achieve the above object, the present application provides the following technical scheme: a gauge for measuring the size of a to-be-measured groove, comprising a first positioning seat and a second positioning seat connected by a cross beam, and a to-be-measured part placed below the first positioning seat and the second positioning seat, wherein a to-be-measured groove is formed on the to-be-measured part; the first positioning seat is connected to a slide rod through an elastic mechanism, the end of the slide rod is provided with a measuring pin, and the measuring pin extends into the to-be-measured groove; an extension is arranged on the side wall of the slide rod, a micrometer is arranged on the cross beam, and the needle of the micrometer cooperates with the extension.

[0006] The present application also provides the following technical scheme: a use method, comprising the following steps Step one, before measurement, the micrometer is loaded into the cross beam through the socket, and the micrometer is fixed by a set screw. Before fixing, the micrometer is adjusted by moving up and down to ensure that the needle is in the right position, so that the needle can stretch and retract freely during measurement. Step two, the part in the process or after the process is in a flat state, when measuring the size, the measuring tool is directly placed on the end face of the measured size of the measured part through the first positioning seat and the second positioning seat; the measuring tool is moved, the knurled thumb screw is adjusted, the slide rod is extended into the measured groove of the measured part, the upper surface of the measuring pin is in contact with the lower surface of the measured groove of the measured part; then, the slide rod is pushed upward to the top end by the compression spring; at this time, the extension of the slide rod pushes the needle of the dial gauge, and the size measurement process is completed; Step three, after the measurement is completed, the knurled thumb screw is pushed to make the upper surface of the measuring pin away from the lower surface of the measured groove of the measured part, so as to prevent the measuring tool from moving in contact and scratching the surface of the part; at this time, the measuring tool is moved to the appropriate position in the measured groove, the measuring tool is taken out of the part, and the measurement task is completed.

[0007] Compared with the prior art, the beneficial effects of the present application are: The beam connects the two end positioning blocks to directly lap on the measurement reference of the part, ensuring the stability during the measurement. The measuring pin structure is installed in the detection module to convert the measurement direction, realize the direct contact of the other surface of the cavity size, and ensure the direct measurement during the measurement. The indirect measurement method in the previous process is improved, the error existing in the indirect measurement is reduced, and the detection efficiency is improved. Through the reasonable structure design of the cavity measuring tool, the size measurement is directly performed, the process is improved, the part state is ensured, and the use compliance of the part is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 The figure is a structure diagram of the measuring tool for measuring the size of the measured groove.

[0009] Figure 2 The figure is an enlarged view of the measuring tool for measuring the size of the measured groove.

[0010] 1, first positioning seat; 2, second positioning seat; 3, beam; 4, slide rod; 5, measuring pin; 6, cylindrical pin; 7, compression spring; 8, knurled thumb screw; 9, cover plate; 10, dial gauge; 11, measured part. DETAILED DESCRIPTION

[0011] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0012] Please refer to Figures 1-2The present invention provides a technical solution: a measuring tool for measuring the size of a groove to be measured, comprising a first positioning seat 1 and a second positioning seat 2 connected by a crossbeam 3, and a part to be measured 11 placed below the first positioning seat 1 and the second positioning seat 2, wherein the part to be measured 11 is provided with a groove to be measured.

[0013] The first positioning seat 1 is connected to the slide rod 4 via an elastic mechanism, which includes a compression spring 7. A spring groove is formed inside the slide rod 4. A cylindrical pin 6 is mounted on the first positioning seat 1. The two ends of the compression spring 7 are respectively mounted in the spring groove and on the cylindrical pin 6. The compression spring 7 provides an upward force to the measuring mechanism, causing the measuring pin 5 to contact the groove to be measured, and also causing the extension on the slide rod 4 to have an upward tendency.

[0014] The end of the slide rod 4 is provided with a measuring pin 5, which extends into the groove to be measured. The side wall of the slide rod 4 is provided with an extension, and the crossbeam 3 is provided with a dial indicator 10, the needle of the dial indicator 10 engaging with the extension. The crossbeam 3 is provided with a socket, and the dial indicator 10 is fixed in the socket by a set screw.

[0015] The sliding rod 4 has a knurled small-head screw 8 at its head end, which passes through the crossbeam 3. During measurement, the knurled small-head screw 8 serves to manually adjust the sliding rod 4. The measuring pin 5 forms a hook shape with the end of the sliding rod 4, and the upper surface of the measuring pin 5 contacts the lower surface of the groove to be measured in the part to be measured 11.

[0016] The slide bar 4 is fastened to the first positioning seat 1 by the cover plate 9, which restricts the slide bar 4 from sliding in the first positioning seat 1 and ensures the stability of its movement.

[0017] The present invention also provides a method of use, comprising the following steps: Step 1: Before measurement, insert the dial indicator 10 into the crossbeam 3 through the socket and fix the dial indicator 10 with the set screw. Before fixing, move the dial indicator 10 up and down to adjust it so that the needle is in a suitable position to ensure that the needle can extend and retract freely during the measurement process. Step two: When the part is in a flat position during or after processing, the measuring tool is placed directly on the end face of the part to be measured via the first positioning seat 1 and the second positioning seat 2. Move the measuring tool and adjust the knurled small head screw 8 to insert the slide rod 4 into the groove to be measured in the part, so that the upper surface of the measuring pin 5 contacts the lower surface of the groove to be measured in the part 11. Then, the slide rod 4 is pushed upward to the top by the compression spring 7. At this time, the extension of the slide rod 4 pushes the needle of the dial indicator 10 to complete the measurement process. Step 3: After the measurement is completed, push the knurled small head screw 8 to disengage the upper surface of the measuring pin 5 from the lower surface of the groove to be measured in the part 11, to prevent the measuring tool from moving during contact and scratching the surface of the part; at this time, move the measuring tool to move the slide bar 4 to a suitable position in the groove to be measured, remove the measuring tool from the part, and complete the measurement task.

[0018] The solution achieves measurement using a reverse hook structure of the measuring tool. Innovatively, by installing a measuring pin 5 on the slide rod 4, the measurement direction is changed. This allows two measuring surfaces that were originally not directly detectable to directly contact each other in opposite directions after the measuring pin 5 is installed, thus enabling direct measurement of the dimensions of the groove to be measured.

[0019] Working Principle: Utilizing a measuring tool capable of reverse hook measurement, an innovative design involves installing a measuring pin 5 on the slide rod 4 to reverse the measurement direction. This allows two previously inaccessible measuring surfaces to directly contact each other after the measuring pin 5 is installed, enabling direct measurement of the mounting groove dimensions and eliminating errors caused by indirect dimensional measurements. The measuring tool employs two mounting bases, forming a double-column structure. During measurement, the two mounting bases overlap at both ends of the diameter of the disc-shaped part, ensuring stable and reliable measurement.

[0020] Traditional measurement methods cannot directly measure the dimensions of the groove to be tested. It is necessary to obtain the dimensions indirectly through conversion from measurements of related dimensions. For example... Figure 2 As shown, dimensions B and C can be obtained directly by measurement, and dimension A can be indirectly obtained by subtracting dimension C from dimension B. The drawback of traditional measurement methods is that they are indirect measurements, introducing more dimensions through conversion, which increases measurement error.

[0021] On the one hand, by introducing a reverse hook measurement method into the measuring instrument, direct contact measurement is achieved, which is not possible with traditional general measurement methods. On the other hand, the measuring instrument adopts two mounting bases to achieve a double column structure. The two mounting bases overlap at both ends of the diameter of the part during measurement, ensuring stability and reliability during the measurement process. If only one mounting base is used, a sliding rod structure needs to be installed on one side of the mounting base during the use of the measuring instrument, resulting in structural asymmetry and easy tilting to one side during measurement.

[0022] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 measuring tool for measuring the size of a groove to be measured, characterized in that: It includes a first positioning seat (1) and a second positioning seat (2) connected by a crossbeam (3) and a part to be tested (11) placed below the first positioning seat (1) and the second positioning seat (2), wherein the part to be tested (11) is provided with a test groove; The first positioning seat (1) is connected to the slide rod (4) through an elastic mechanism. The end of the slide rod (4) is provided with a measuring pin (5), and the measuring pin (5) extends into the groove to be measured. The slide bar (4) has an extension on its side wall, and the crossbeam (3) has a dial indicator (10) with the pointer of the dial indicator (10) engaging with the extension.

2. The measuring tool for measuring the size of the groove to be measured according to claim 1, characterized in that: The sliding rod (4) is provided with a knurled small head screw (8) at its head end, and the knurled small head screw (8) passes through the crossbeam (3).

3. The measuring instrument for measuring the size of the groove to be measured according to claim 1, characterized in that: The measuring pin (5) and the end of the slide bar (4) form a hook shape, and the upper surface of the measuring pin (5) contacts the lower surface of the groove to be measured of the part to be measured (11).

4. The measuring tool for measuring the size of the groove to be measured according to claim 1, characterized in that: The slide bar (4) is fastened to the first positioning seat (1) by the cover plate (9), which restricts the slide bar (4) from sliding in the first positioning seat (1).

5. The measuring tool for measuring the size of the groove to be measured according to claim 1, characterized in that: The elastic mechanism includes a compression spring (7), a spring groove is provided in the slide rod (4), a cylindrical pin (6) is installed on the first positioning seat (1), and the two ends of the compression spring (7) are respectively installed in the spring groove and the cylindrical pin (6).

6. The measuring tool for measuring the size of the groove to be measured according to claim 1, characterized in that: The crossbeam (3) is provided with a socket, and the dial indicator (10) is fixed in the socket by a set screw.

7. A method of use, implemented based on the measuring tool for measuring the size of the groove to be measured as described in claim 1, characterized in that: Includes the following steps Step 1: Before measurement, insert the dial indicator (10) into the crossbeam (3) through the socket and fix the dial indicator (10) with the set screw. Before fixing, move the dial indicator (10) up and down to adjust it so that the needle is in a suitable position and ensures that the needle can extend and retract freely during the measurement process. Step 2: The part being processed or after processing is in a flat position. When measuring dimensions, the measuring tool is placed directly on the end face of the part to be measured through the first positioning seat (1) and the second positioning seat (2). Move the measuring tool, adjust the knurled small head screw (8), and insert the slide rod (4) into the groove to be measured in the part to be measured, so that the upper surface of the measuring pin (5) contacts the lower surface of the groove to be measured in the part to be measured (11). Then, the slide rod (4) is pushed upward to the top by the compression spring (7). At this time, the extension of the slide rod (4) pushes the dial indicator (10) needle to complete the process of measuring dimensions. Step 3: After the measurement is completed, push the knurled small head screw (8) to separate the upper surface of the measuring pin (5) from the lower surface of the groove to be measured of the part (11) to prevent the measuring tool from moving during contact and scratching the surface of the part; at this time, move the measuring tool to move the slide bar (4) to a suitable position in the groove to be measured, take the measuring tool out of the part, and complete the measurement task.

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