Wall thickness measuring device

Abstract

The utility model relates to a wall thickness measuring device, which comprises a base, a support, a guide rod and a calibration meter, the calibration meter comprises a meter body and a meter rod, one end of the support is fixedly connected with the base, the other end of the support is fixedly connected with a first measuring head, the support is further fixedly connected with a target disc, a positioning hole is further arranged on the surface of the support, and the guide rod is sleeved in the positioning hole. One end of the guide rod is fixedly connected with the second measuring head, the first measuring head and the second measuring head are oppositely arranged, the other end of the guide rod is fixedly connected with one end of the meter frame, the other end of the meter frame is provided with a limiting groove, the meter rod is sleeved with the limiting groove, one end of the meter rod is fixedly connected with the meter body, and the other end of the meter rod and the target disc are oppositely arranged. By adopting the wall thickness measuring device provided by the utility model, the bottom surface of the base is always used as a unified positioning reference during measurement, the base is always used for stably supporting the bracket, and the first measuring head and the second measuring head are always clamped at a unified position on the surface of a workpiece along a unified direction, so that the measuring precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring devices, in particular to a wall thickness measuring device. Background Art

[0002] In the mechanical processing industry, in order to improve the quality of mechanical processing products, it is generally necessary to measure the various sizes and positions of parts. In the existing technology, the commonly used detection tools mainly include tape measures, vernier calipers, micrometers, dial indicators, etc. With the continuous development of the mechanical manufacturing industry, especially in the fields of aviation and aerospace industries, more and more parts with strange shapes are used. These special-shaped parts have high technical requirements, and the existing detection tools often cannot detect some of their dimensions.

[0003] For example, the patent document with publication number "CN210464308U" discloses a high-precision measuring instrument for groove wall thickness, including a U-shaped ruler frame, a detachable fixed measuring head is installed at one end of the U-shaped ruler frame, the outer peripheral surface of the fixed measuring head serves as a positioning surface, a micrometer screw is threaded at the other end of the U-shaped ruler frame, a detachable movable measuring head is installed at one end of the micrometer screw, the outer end surface of the movable measuring head serves as a clamping surface, the positioning surface and the clamping surface are opposite to each other, a fixed sleeve is installed at the other end of the micrometer screw, and main scale lines arranged at equal intervals along its axial direction are arranged on the outer peripheral surface of the fixed sleeve. By adopting the patented technical solution, the groove wall thickness surface of the workpiece to be measured is clamped between the positioning surface on the fixed measuring head and the clamping surface on the movable measuring head, and the groove wall thickness value of the workpiece can be measured according to the conventional micrometer operation method. For example, the patent document with publication number "CN107144205A" discloses a wall thickness measuring device, which includes a handle A, a handle B and a pair of measuring rods. The middle part of handle A is rotatably connected to the middle part of handle B, and the ends of handle A and handle B are both provided with measuring arms, the measuring rods are slidably connected to the measuring arms, and the ends of the measuring rods are provided with a probe, which is rotatably connected to the measuring rod, and a scale A is provided on the measuring rod. By adopting the patented technical solution, the wall thickness measuring device bypasses the interference surface between the part to be measured and the measuring device, and the wall thickness value can be measured without destroying the part itself.

[0004] However, when the above two measuring devices are used to measure the workpiece, the operator needs to operate the device by hand, which varies from person to person. When the operator operates the device by hand, it is impossible to ensure that the clamping direction of the measuring head and the workpiece surface always maintain a unified clamping direction and a unified clamping point. Different operators will obtain different measurement results, resulting in large measurement errors. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a wall thickness measuring device.

[0006] The utility model provides a wall thickness measuring device, which comprises a base, a bracket, a guide rod and a calibration table, wherein the calibration table comprises a table body and a table rod, one end of the bracket is fixedly connected to the base, the other end of the bracket is fixedly connected to a first probe, the bracket is also fixedly connected to a target disk and a positioning hole is further provided on the surface of the bracket, the guide rod is sleeved in the positioning hole, and one end of the guide rod is fixedly connected to a second probe, the first probe and the second probe are opposite to each other, the other end of the guide rod is fixedly connected to one end of a table frame, the other end of the table frame is provided with a limiting groove, the table rod is sleeved in the limiting groove, and one end of the table rod is fixedly connected to the table body, the other end of the table rod and the target disk are opposite to each other, and the axial direction of the table rod and the axial direction of the guide rod are parallel to each other.

[0007] The end surfaces of the first probe and the second probe serve as measuring surfaces, and the measuring surfaces are in a hemispherical shape or a conical shape.

[0008] The axial direction of the meter rod and the axial direction of the guide rod are also parallel to the horizontal plane.

[0009] The wall thickness measuring device also includes a locking screw, which is threadedly connected to the notch of the limiting groove.

[0010] The watch frame is L-shaped as a whole.

[0011] A bushing is also sleeved in the positioning hole, and the bushing is clamped between the outer peripheral surface of the guide rod and the inner wall surface of the positioning hole.

[0012] The bracket is also fixedly connected to one end of the guide seat, and the other end of the guide seat is also fixedly connected to the base by using a fastener. A guide hole is also provided on the surface of the guide seat, and the guide rod also passes through the guide hole.

[0013] The wall thickness measuring device also includes a thickness standard block, which is fixedly connected to the supporting platform, and the supporting platform and the base are fixedly connected together using fasteners.

[0014] The fasteners include cylindrical pins and bolts.

[0015] The target plate is in the shape of a cylinder as a whole.

[0016] The beneficial effect of the utility model is that: by using the wall thickness measuring device provided by the utility model, the user can pre-select the corresponding thickness standard block according to the thickness of the workpiece to be measured, and then clamp the thickness standard block between the first probe and the second probe, make the gauge rod abut against the surface of the target plate, align the calibration gauge to zero, and then clamp the workpiece between the first probe and the second probe, the calibration gauge reading is the calibration value of the workpiece thickness relative to the thickness standard block, and finally, the sum of the thickness of the thickness standard block and the calibration value is the workpiece thickness value. Compared with the prior art, the wall thickness measuring device provided by the utility model always uses the bottom surface of the base as a unified positioning reference when measuring the wall thickness measuring device and the workpiece, the base always stably supports the bracket, and makes the first probe and the second probe always clamped at a unified position on the workpiece surface along a unified direction, thereby reducing errors caused by human factors and improving measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the front view of the utility model;

[0018] Figure 2 It is the front view of the table frame of the utility model.

[0019] In the figure: 1-base, 2-bracket, 3-guide rod, 4-calibration table, 5-table body, 6-table rod, 7-first probe, 8-target plate, 9-second probe, 10-table frame, 11-locking screw, 12-bushing, 13-guide seat, 14-fastener, 15-guide hole, 16-thickness standard block, 17-support table, 18-limiting groove. DETAILED DESCRIPTION

[0020] The technical solution of the utility model is further described below in conjunction with the accompanying drawings, but the protection scope required is not limited to the above;

[0021] The utility model provides a wall thickness measuring device, such as Figure 1 , Figure 2 As shown, it includes a base 1, a bracket 2, a guide rod 3 and a calibration meter 4, the calibration meter 4 includes a meter body 5 and a meter rod 6, one end of the bracket 2 is fixedly connected to the base 1, the other end of the bracket 2 is fixedly connected to the first probe 7, the bracket 2 is also fixedly connected to the target plate 8 and a positioning hole is also provided on the surface of the bracket 2, the guide rod 3 is sleeved in the positioning hole, and one end of the guide rod 3 is fixedly connected to the second probe 9, the first probe 7 and the second probe 9 are opposite to each other, the other end of the guide rod 3 is fixedly connected to one end of the meter frame 10, the other end of the meter frame 10 is provided with a limiting groove 18, the meter rod 6 is sleeved in the limiting groove 18, and one end of the meter rod 6 is fixedly connected to the meter body 5, the other end of the meter rod 6 and the target plate 8 are opposite to each other, and the axial direction of the meter rod 6 and the axial direction of the guide rod 3 are parallel to each other.

[0022] When using the wall thickness measuring device provided by the utility model, the calibration table 4 can be preferably replaced by a dial indicator. The user can pre-select the corresponding thickness standard block according to the thickness of the workpiece to be measured, and then clamp the thickness standard block between the first probe and the second probe, so that the table rod is against the surface of the target plate, and the calibration table is zeroed. Then, the workpiece is clamped between the first probe and the second probe. The calibration table reading is the calibration value of the workpiece thickness relative to the thickness standard block. Finally, the sum of the thickness of the thickness standard block and the calibration value is the workpiece thickness value. Compared with the prior art, the wall thickness measuring device provided by the utility model always uses the bottom surface of the base as a unified positioning reference when measuring the wall thickness measuring device and the workpiece. The base always stably supports the bracket, and the first probe and the second probe are always clamped at a unified position on the workpiece surface along a unified direction, thereby reducing errors caused by human factors and improving measurement accuracy.

[0023] Specifically, the end surfaces of the first probe 7 and the second probe 9 serve as measuring surfaces, and the measuring surfaces are hemispherical or conical. The axial direction of the meter rod 6 and the axial direction of the guide rod 3 are also parallel to the horizontal plane.

[0024] In addition, the wall thickness measuring device further comprises a locking screw 11 which is screwed to the notch of the limiting groove 18 , so that the calibration gauge 4 can be conveniently clamped in the limiting groove 18 and the position of the calibration gauge 4 relative to the gauge frame 10 can be locked.

[0025] In addition, the meter frame 10 is L-shaped as a whole. A bushing 12 is also mounted in the positioning hole, and the bushing 12 is clamped between the outer peripheral surface of the guide rod 3 and the inner wall surface of the positioning hole.

[0026] Specifically, the bracket 2 is also fixedly connected to one end of the guide seat 13, and the other end of the guide seat 13 is also fixedly connected to the base 1 by a fastener 14. The surface of the guide seat 13 is also provided with a guide hole 15, and the guide rod 3 also passes through the guide hole 15. The wall thickness measuring device also includes a thickness standard block 16, and the thickness standard block 16 is fixedly connected to the support platform 17, and the support platform 17 and the base 1 are fixedly connected by a fastener 14. Preferably, the fastener 14 includes a cylindrical pin and a bolt. The target plate 8 is cylindrical in shape as a whole. Thereby improving the assembly accuracy between the bracket 2, the guide seat 13, the thickness standard block 16 and the base 1, reducing the assembly error, and allowing the operator to uniformly use the bottom surface of the base 1 as the measurement reference when measuring, thereby ensuring the measurement accuracy.

Claims

1. A wall thickness measuring device, characterized in that: The invention comprises a base (1), a bracket (2), a guide rod (3) and a calibration table (4), wherein the calibration table (4) comprises a table body (5) and a table rod (6), one end of the bracket (2) is fixedly connected to the base (1), the other end of the bracket (2) is fixedly connected to a first probe (7), the bracket (2) is also fixedly connected to a target plate (8), and a positioning hole is provided on the surface of the bracket (2), the guide rod (3) is sleeved in the positioning hole, and one end of the guide rod (3) is fixedly connected to a second probe (9), The first probe (7) and the second probe (9) are opposed to each other, the other end of the guide rod (3) is fixedly connected to one end of the meter frame (10), the other end of the meter frame (10) is provided with a limiting groove (18), the meter rod (6) is inserted into the limiting groove (18), and one end of the meter rod (6) is fixedly connected to the meter body (5), the other end of the meter rod (6) and the target plate (8) are opposed to each other, and the axial direction of the meter rod (6) and the axial direction of the guide rod (3) are parallel to each other.

2. A wall thickness measuring device according to claim 1, characterized in that: The end surfaces of the first probe (7) and the second probe (9) serve as measuring surfaces, and the measuring surfaces are in the shape of a hemispherical surface or a conical surface.

3. A wall thickness measuring device according to claim 1, characterized in that: The axial direction of the meter rod (6) and the axial direction of the guide rod (3) are also parallel to the horizontal plane.

4. A wall thickness measuring device according to claim 1, characterized in that: The wall thickness measuring device also includes a locking screw (11), which is screwed into the notch of the limiting groove (18).

5. A wall thickness measuring device as claimed in claim 1, characterized in that: The watch frame (10) is L-shaped as a whole.

6. A wall thickness measuring device according to claim 1, characterized in that: A bushing (12) is also sleeved in the positioning hole, and the bushing (12) is clamped between the outer peripheral surface of the guide rod (3) and the inner wall surface of the positioning hole.

7. A wall thickness measuring device according to claim 1, characterized in that: The bracket (2) is also fixedly connected to one end of the guide seat (13), and the other end of the guide seat (13) is also fixedly connected to the base (1) using a fastener (14). The surface of the guide seat (13) is also provided with a guide hole (15), and the guide rod (3) also passes through the guide hole (15).

8. A wall thickness measuring device according to claim 1, characterized in that: The wall thickness measuring device also includes a thickness standard block (16), the thickness standard block (16) is fixedly connected to a support platform (17), and the support platform (17) and the base (1) are fixedly connected together using a fastener (14).

9. A wall thickness measuring device according to claim 7 or 8, characterized in that: The fastener (14) includes a cylindrical pin and a bolt.

10. A wall thickness measuring device according to claim 1, characterized in that: The target plate (8) is in the shape of a cylinder as a whole.

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