A wall thickness caliper with vernier

Abstract

This invention discloses a wall thickness caliper with a vernier, used to measure the spoke wall thickness Hi at the compressor wheel's radius of rotation Ri by positioning it in contact with the end face of the compressor wheel's radius of rotation R0. Because the wall thickness Hi at the groove area between the compressor wheel's radius of rotation R0 and Ri is measured by positioning the left side of the moving frame in contact with the end face of the compressor wheel's radius of rotation R0, the problem of low accuracy in wall thickness measurements obtained by relying on manual experience in caliper positioning is solved.

Description

Technical Field

[0001] This invention relates to a wall thickness caliper with a vernier, belonging to the field of measuring instrument technology. Background Technology

[0002] In the manufacturing process of aero-engine components, it is necessary to measure the range of the compressor wheel's radius of rotation. Figure 1 The wheel spoke wall thickness Hi is located at the groove range between R0 and Ri.

[0003] Existing thickness measuring instruments, such as the workpiece wall thickness measuring caliper disclosed in Chinese Patent Publication No. CN217083590U, employ the following technical solution: the upper part of the vernier scale is slidably connected to the caliper body, a fixed clamp is fixedly connected to one end of the caliper body, and an extension rod is fixedly connected to the bottom end of the side wall of the fixed clamp. The vernier scale, which slides along the caliper body, can meet the workpiece measurement requirements. A measuring rod is present in the through hole of the vernier scale. Although the measuring rod and the extension rod achieve non-interference measurement of the workpiece, when it is necessary to determine the thickness at a specific position within the radius of rotation, it can only be measured by manual experience. Since the positioning based on manual experience is inaccurate, the accuracy of the measured wall thickness value is low. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a wall thickness caliper with a vernier.

[0005] The present invention is achieved through the following technical solutions.

[0006] The present invention provides a wall thickness caliper with a vernier, which is used to measure the spoke wall thickness Hi at the position of the compressor wheel rotation radius Ri by positioning it in contact with the end face of the compressor wheel rotation radius R0.

[0007] The wall thickness caliper includes:

[0008] Upper clip;

[0009] The lower clamping foot has one end that is rotatably hinged to the upper clamping foot via a rotating shaft. The upper and lower clamping feet can rotate relative to each other around the rotating shaft. The other ends of the upper and lower clamping feet away from the rotating shaft are equipped with measuring jaws. The measuring jaws of the upper and lower clamping feet clamp the compressor wheel disc at the radius of rotation and the thickness of the spoke wall at Hi.

[0010] The movable frame is controllably slidably mounted on the upper clamping foot. After the movable frame is controllably slidably mounted, it can be positioned by the rotation radius R0 end face of the compressor wheel.

[0011] The indicator is fixedly installed on the upper jaw and is located at the midpoint of the distance between the rotating shaft and the measuring jaw.

[0012] It also includes a spring sheet, which is installed between the moving frame and the upper locking foot.

[0013] The movable frame is provided with a threaded hole, and a screw is screwed into the threaded hole of the movable frame. When the screw is screwed down, it compresses the spring plate to make the movable frame fixed on the upper clamping foot. When the screw is screwed up, it does not compress the spring plate, so that the movable frame and the upper clamping foot can slide relative to each other, thereby realizing the controllable sliding installation of the movable frame on the upper clamping foot.

[0014] It also includes upstream and downstream markers fixed to the side of the movable frame.

[0015] The upstream and downstream indicators are limited by contact on the upper locking foot; the upper locking foot is provided with a scale, and the adjustment amount of the moving frame displacement can be obtained by the upstream and downstream indicators indicating the scale on the upper locking foot.

[0016] It also includes a resilient reset component.

[0017] The elastic reset element is a spring or an elastic rubber body.

[0018] One end of the elastic reset component is fixedly installed on the upper clamping foot, and the other end of the elastic reset component is fixed on the lower clamping foot. The elastic reset component provides elastic reset force for the upper clamping foot and the lower clamping foot to engage.

[0019] The beneficial effects of this invention are as follows: When measuring the spoke wall thickness Hi at the groove range between the compressor wheel's rotation radius R0 and Ri, the left side of the moving frame is positioned and contacted with the end face of the compressor wheel's rotation radius R0 to measure the spoke wall thickness Hi at the compressor wheel's rotation radius Ri. This solves the problem of low accuracy in wall thickness measurements obtained by relying on manual experience for positioning. Attached Figure Description

[0020] Figure 1 This is a front view schematic diagram of the measurement and usage state of the present invention;

[0021] Figure 2 This is a side cross-sectional view of the movable frame, spring sheet, and screw of the present invention;

[0022] In the diagram: 1-Upper locking foot; 2-Rotating shaft; 3-Lower locking foot; 4-Elastic reset element; 5-Screw; 6-Swallowing indicator; 7-Downstream indicator; 8-Moving frame; 9-Spring plate; 10-Indicator; 11-Compressor wheel. Detailed Implementation

[0023] The technical solution of the present invention is further described below, but the scope of protection is not limited to what is described.

[0024] like Figures 1 to 2 As shown.

[0025] This application discloses a wall thickness caliper with a vernier, comprising:

[0026] The upper clamping foot 1 and the lower clamping foot 3 are rotatably hinged to each other via a rotating shaft 2. The upper clamping foot 1 and the lower clamping foot 3 can rotate relative to each other around the rotating shaft 2. The other ends of the upper clamping foot 1 and the lower clamping foot 3 away from the rotating shaft 2 are each equipped with measuring jaws. The measuring jaws of the upper clamping foot 1 and the lower clamping foot 3 clamp the compressor wheel disk 11 at the rotation radius of the spoke wall thickness Hi.

[0027] The movable frame 8 is controllably slidably mounted on the end face of the compressor wheel 11 with a rotation radius R0, and the movable frame 8 provides a positioning contact base; the movable frame 8 is controllably slidably mounted on the upper clamping foot 1 or the lower clamping foot 3, with the movable frame 8 preferably being controllably slidably mounted on the upper clamping foot 1;

[0028] The indicator 10 is located at the midpoint between the rotating shaft 2 and the measuring jaw. The indicator 10 measures the opening value between the upper jaw 1 and the lower jaw 3. The indicator 10 is fixedly installed on the upper jaw 1 by a pin.

[0029] The measuring jaws of the upper jaw 1 and the lower jaw 3 first make contact, and the pointer of the indicator 10 is adjusted to zero. When measuring the spoke wall thickness Hi at the radius of rotation Ri of the compressor wheel 10, the moving frame 8 slides and moves on the upper jaw 1 to position the moving frame 8 in contact with the end face of the radius of rotation R0 of the compressor wheel 11. At this time, the distance from the measuring jaw of the upper jaw 1 to the left side of the moving frame 8 is ΔRi = R0 - Ri. The upper jaw 1 and the lower jaw 3 rotate and engage around the rotating shaft 2, and the left side of the moving frame 8 is in contact with the rotating compressor wheel 11. The radius R0 end face positioning contact realizes the positioning of the measurement position Ri. The measuring jaws of the upper clamping foot 1 and the lower clamping foot 3 clamp the spoke wall thickness Hi at the position of the rotation radius Ri of the compressor disk 11. Since the indicator 10 is between the measuring jaw and the rotating shaft 2, the pointer of the indicator 10 indicates half of the actual value during measurement. For example, if the distance from the rotating shaft 2 to the measuring jaw is 2A, and the distance from the center of the indicator 10 to the measuring jaw is A, according to the principle of equal angles opposite equal sides of similar triangles, the value obtained by the indicator 10 is half of the actual value of the wall thickness Hi.

[0030] Because when measuring the spoke wall thickness Hi at the groove range between the gyration radius R0 and Ri of the compressor disk 11, the left side of the moving frame 8 is positioned and contacted with the end face of the gyration radius R0 of the compressor disk 11 to measure the spoke wall thickness Hi at the gyration radius Ri of the compressor disk 11, the problem of low accuracy of the measured wall thickness value due to manual experience in clamping measurement is solved.

[0031] It also includes a spring plate 9, which is installed between the movable frame 8 and the upper locking foot 1; the movable frame 8 is provided with a threaded hole, and a screw 5 is screwed into the threaded hole of the movable frame 8. When the screw 5 is screwed down, it presses the spring plate 9 to make the movable frame 8 fixed on the upper locking foot 1 and does not move. When the screw 5 is screwed up, it does not press the spring plate 9, so that the movable frame 8 and the upper locking foot 1 can slide relative to each other, so that the movable frame 8 can be controllably slidably installed on the upper locking foot 1.

[0032] It also includes upstream marker 6 and downstream marker 7 that are bonded, welded or integrally formed and fixed to the side of the movable frame 8. The upstream marker 6 and downstream marker 7 are in contact with and limited on the upper locking foot 1. The upper locking foot 1 is provided with a scale. The adjustment amount of the displacement of the movable frame 8 can be obtained by the scale indicated on the upper locking foot 1 by the upstream marker 6 and downstream marker 7.

[0033] It also includes an elastic reset member 4 installed on the upper clamping foot 1 and the lower clamping foot 3. The elastic reset member 4 is a spring or an elastic rubber body. One end of the elastic reset member 4 is fixed to the upper clamping foot 1 by a screw, and the other end of the elastic reset member 4 is fixed to the lower clamping foot 3 by a pin. The elastic reset member 4 provides an elastic reset force for the upper clamping foot 1 and the lower clamping foot 3 to be engaged.

Claims

1. A wall thickness caliper with a vernier, characterized in that, The wall thickness caliper is used for measuring the wall thickness Hi of the spoke wall at the position of the rotation radius Ri of the compressor wheel (11) in contact with the end surface of the rotation radius R0 of the compressor wheel (11). It comprises: an upper clamping leg (1); a lower clamping leg (3) rotatably connected to the upper clamping leg (1) at one end via a rotating shaft (2), and the upper clamping leg (1) and the lower clamping leg (3) are relatively rotatable about the rotating shaft (2); the other end of the upper clamping leg (1) and the lower clamping leg (3) away from the rotating shaft (2) is provided with a measuring claw, and the measuring claw of the upper clamping leg (1) and the measuring claw of the lower clamping leg (3) clamp the spoke wall thickness Hi at the rotation radius of the compressor wheel (11); a moving frame (8) controllably and slidably installed on the upper clamping leg (1), and the moving frame (8) is capable of being controlled to slide and rely on the positioning of the end surface of the rotation radius R0 of the compressor wheel (11); an indicating table (10) fixedly installed on the upper clamping leg (1), and the indicating table (10) is located at the middle position of the distance from the rotating shaft (2) to the measuring claw; a spring sheet (9) installed between the moving frame (8) and the upper clamping leg (1); an upper cursor (6) and a lower cursor (7) fixedly installed on the side of the moving frame (8); the upper cursor (6) and the lower cursor (7) are in contact and limited on the upper clamping leg (1); the upper clamping leg (1) is provided with a scale, and the adjusting amount of the displacement of the moving frame (8) can be obtained by the indication of the scale on the upper clamping leg (1) by the upper cursor (6) and the lower cursor (7).

2. The wall thickness calipers with vernier according to claim 1, characterized in that: the moving frame (8) is provided with a threaded hole, a screw (5) is screwed and installed in the threaded hole of the moving frame (8), the spring sheet (9) is pressed downward by the screw (5) to make the moving frame (8) fastened on the upper clamping leg (1) and not move, and the spring sheet (9) is not pressed upward by the screw (5) to make the moving frame (8) and the upper clamping leg (1) relatively slidable, so that the moving frame (8) is controllably and slidably installed on the upper clamping leg (1).

3. The wall thickness calipers with vernier according to claim 1, characterized in that: It further comprises an elastic reset member (4).

4. The wall thickness calipers with vernier according to claim 3, characterized in that: The elastic reset member (4) is a spring or an elastic rubber body.

5. The wall thickness calipers with vernier according to claim 3, characterized in that: One end of the elastic reset member (4) is fixedly installed on the upper clamping leg (1), the other end of the elastic reset member (4) is fixedly installed on the lower clamping leg (3), and the elastic reset member (4) provides an elastic reset force for the pinching of the upper clamping leg (1) and the lower clamping leg (3).

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