Long bolt conical surface measuring tool

Abstract

The utility model discloses a long bolt conical surface measuring tool, and belongs to the technical field of detection tools. The measuring tool comprises a base, a measuring head and a dial indicator, a groove is formed in the top of the base, a positioning assembly is arranged at the position, at one end of the groove, of the base, the measuring head and the dial indicator are both arranged on the base, the measuring head and a measuring head of the dial indicator are coaxially arranged, and the measuring head and the dial indicator both partially extend into the groove. The outer circle on the long bolt is positioned through the positioning assembly and the bottom face of the groove, it is ensured that the central axis of the long bolt, the central axis of the measuring head and the central axis of the dial indicator measuring head are located on a certain plane parallel to the bottom face of the groove, and the reference face on the long bolt is positioned through the positioning assembly. Meanwhile, the long bolt is positioned in the radial direction through the measuring head, it is ensured that the measured value of the dial indicator is the tolerance value of the value to be measured, and then whether the diameter of the conical surface at the position 52 mm away from the head of the long bolt meets the size requirement of # imgabs0 or not can be judged according to the reading on the dial indicator.

Description

Technical Field

[0001] The utility model relates to a long bolt conical surface measuring tool, belonging to the technical field of inspection tools. Background Art

[0002] In the field of aeroengines, as a fastener, a long bolt is used to connect important components in the high-temperature environment of the engine. By using the design structure of the long bolt itself, the connection of two components is realized. When affected by high temperature, external force vibration or other factors, the coaxiality of the two bolt holes to be connected is ensured to be 0.06 mm, further ensuring that the connection between the two components is not loose and stably playing its functional role. Such long bolts have relatively high requirements for the precision of the conical surface. The structure of the long bolt is as Figure 1 shown. After the finished product is processed, it is necessary to detect whether the conical surface diameter at 52 mm from the head of the long bolt meets the dimensional requirements.

[0003] Chinese patent document with the publication number CN107179039A discloses a conical surface detection device, including: a fixed seat; a first dial indicator and a second dial indicator, which are respectively arranged on the fixed seat. The first dial indicator and the second dial indicator are arranged opposite to each other along the same straight line. The straight line is perpendicular to the central axis of the conical surface. When the straight line intersects the conical surface, the two intersection points can respectively contact the first measuring head of the first dial indicator and the second measuring head of the second dial indicator. Among them, according to the standard distance between the two intersection points and the standard taper of the conical surface, the first dial indicator and the second dial indicator are adjusted to measure the actual distance between the two intersection points, and determine the actual taper value and the actual cone height value of the conical surface. The actual taper value and the actual cone height value of the conical surface can be determined, realizing the rapid detection of the conical surface, and effectively improving the detection efficiency and detection accuracy.

[0004] However, this device cannot position the long bolt, so it cannot measure the conical surface diameter at 52 mm from the head of the long bolt. Content of the Utility Model

[0005] To solve the above technical problems, the utility model provides a long bolt conical surface measuring tool.

[0006] The utility model is achieved through the following technical solutions:

[0007] A long bolt conical surface measuring tool includes a base, a measuring head and a dial indicator. A groove is formed at the top of the base. A positioning component is arranged at one end of the groove on the base. The measuring head and the dial indicator are both arranged on the base. The measuring head and the measuring head of the dial indicator are coaxially arranged, and both the measuring head and the dial indicator partially extend into the groove.

[0008] The groove is a rectangular groove, and a positioning groove is provided at one end of the groove on the base, and a threaded hole A is provided on the bottom surface of the positioning groove.

[0009] The positioning assembly includes a positioning block, and the positioning block is fixedly installed on the base by a screw A.

[0010] The positioning block is adapted to the positioning groove.

[0011] A U-shaped notch is provided on the positioning block, and an elongated hole is provided at a position corresponding to the screw A on the positioning block.

[0012] A positioning hole A is provided on one side of the groove on the base, and the positioning hole A is vertically arranged with respect to the groove. A threaded hole B is provided on the base, and one end of the threaded hole B communicates with the positioning hole A. The threaded hole B is vertically arranged with respect to the positioning hole A, and a screw B is threadedly connected to the threaded hole B.

[0013] After the measuring head of the dial indicator passes through the positioning hole A and extends into the groove, the measuring head is locked and fixed by the screw B.

[0014] A positioning hole B is provided on the base. The positioning hole B is coaxially arranged with the positioning hole A, and the positioning hole B and the positioning hole A are located on both sides of the groove. A limiting groove is provided at one end of the positioning hole B away from the groove on the base. A threaded hole C is provided on the base, and one end of the threaded hole C communicates with the positioning hole B. The threaded hole C is vertically arranged with respect to the positioning hole B, and a screw C is threadedly connected to the threaded hole C.

[0015] A limiting head is coaxially provided at one end of the measuring head, two planes are evenly distributed on the outer circumferential surface of the limiting head, and two inclined planes are evenly distributed at one end of the measuring head away from the limiting head to sharpen it.

[0016] After the end of the measuring head with the inclined plane passes through the positioning hole B and extends into the groove, the measuring head is locked and fixed by the screw C.

[0017] The beneficial effects of the present utility model are as follows: The φ8.7 outer circle on the long bolt is positioned by the positioning assembly, and the outer circle of the large end of the conical surface on the long bolt is positioned by the bottom surface of the groove, ensuring that the central axis of the long bolt, the central axis of the measuring head, and the central axis of the dial indicator measuring head are on a plane parallel to the bottom surface of the groove. The reference surface on the long bolt is positioned by the positioning assembly, and at the same time, the long bolt is positioned radially by the measuring head, ensuring that the measured value of the dial indicator is the tolerance value of the conical surface diameter at a distance of 52 mm from the head of the long bolt. Then, it is possible to judge whether the conical surface diameter at a distance of 52 mm from the head of the long bolt meets the dimensional requirements. Description of the Drawings

[0018] Figure 1 It is a structural schematic diagram of the long bolt;

[0019] Figure 2 is a front view structural schematic diagram of the present utility model;

[0020] Figure 3 is Figure 2 the top view of;

[0021] Figure 4 is a structural schematic diagram of the base of the present utility model;

[0022] Figure 5 is a front view structural schematic diagram of the positioning block of the present utility model;

[0023] Figure 6 is Figure 5 the sectional view along A-A;

[0024] Figure 7 is a structural schematic diagram of the measuring head of the present utility model;

[0025] Figure 8 is Figure 7 the left view of;

[0026] Figure 9 is Figure 7 the top view of.

[0027] In the figure: 1 - long bolt, 100 - positioning surface, 2 - base, 20 - groove, 21 - positioning groove, 22 - threaded hole A, 23 - positioning hole A, 24 - threaded hole B, 25 - threaded hole C, 26 - limiting groove, 27 - positioning hole B, 3 - measuring head, 30 - inclined surface, 31 - limiting head, 310 - plane, 4 - positioning block, 40 - U-shaped notch, 41 - elongated hole, 5 - screw A, 6 - dial indicator, 7 - screw B, 8 - screw C. Specific embodiments

[0028] The technical solution of the present utility model will be further described below, but the scope of protection claimed is not limited thereto.

[0029] As Figures 1 to 9As shown in the figure, a long bolt conical surface measuring tool of the present utility model includes a base 2, a measuring head 3 and a micrometer 6. A groove 20 is opened at the top of the base 2. A positioning component is provided at one end of the groove 20 on the base 2. The measuring head 3 and the micrometer 6 are both arranged on the base 2. The measuring head 3 and the measuring head of the micrometer 6 are coaxially arranged, and both the measuring head 3 and the micrometer 6 partially extend into the groove 20. When in use, the φ8.7 outer circle on the long bolt 1 is positioned by the positioning component, and the outer circle of the large end of the conical surface on the long bolt 1 is positioned by the bottom surface of the groove 20, ensuring that the central axis of the long bolt 1, the central axis of the measuring head 3, and the central axis of the measuring head of the micrometer 6 are in a plane parallel to the bottom surface of the groove 20. The reference surface 100 on the long bolt 1 is positioned by the positioning component, and at the same time, the long bolt 1 is positioned radially by the measuring head 3, ensuring that the measured value of the micrometer 6 is the tolerance value of the conical surface diameter at a distance of 52 mm from the head of the long bolt. Then, it is possible to judge whether the conical surface diameter at a distance of 52 mm from the head of the long bolt meets the dimensional requirements.

[0030] The groove 20 is a rectangular groove. A positioning groove 21 is opened at one end of the groove 20 on the base 2, and a threaded hole A22 is provided on the bottom surface of the positioning groove 21.

[0031] The positioning component includes a positioning block 4, which is fixedly installed on the base 2 by a screw A5. When in use, the positioning block 4 is fixedly installed at the positioning groove 21 by the screw A5. The screw A5 is threadedly connected to the threaded hole A22, and the two side surfaces of the positioning groove 21 have a positioning and anti-rotation effect on the positioning block 4.

[0032] The positioning block 4 is adapted to the positioning groove 21.

[0033] A U-shaped notch 40 is opened on the positioning block 4, and an elongated hole 41 is opened on the positioning block 4 at a position corresponding to the screw A5. When in use, the width of the U-shaped notch 40 is slightly larger than 8.7 mm, and the φ8.7 outer circle on the long bolt 1 is positioned by the bottom surface of the U-shaped notch 40. The elongated hole 41 is opened on the positioning block 4 to facilitate adjusting the installation height of the positioning block 4 on the base 2 as needed.

[0034] A positioning hole A23 is provided on one side of the groove 20 on the base 2, and the positioning hole A23 is perpendicular to the groove 20. A threaded hole B24 is provided on the base 2. One end of the threaded hole B24 communicates with the positioning hole A23, and the threaded hole B24 is perpendicular to the positioning hole A23. A screw B7 is threadedly connected to the threaded hole B24.

[0035] After the measuring head of the micrometer 6 passes through the positioning hole A23 and extends into the groove 20, the measuring head is locked and fixed by the screw B7.

[0036] The base 2 is provided with a positioning hole B27, which is coaxially arranged with the positioning hole A23, and the positioning hole B27 and the positioning hole A23 are located on both sides of the groove 20. A limiting groove 26 is provided at one end of the base 2 away from the groove 20. The base 2 is provided with a threaded hole C25, one end of the threaded hole C25 communicates with the positioning hole B27, the threaded hole C25 is vertically arranged with the positioning hole B27, and a screw C8 is threadedly connected to the threaded hole C25. During use, the width of the limiting groove 26 matches the distance between the two planes 310 on the limiting head 31. When the limiting head 31 is clamped into the limiting groove 26, the limiting groove 26 has a positioning and anti-rotation effect on the limiting head 31. The end face of the limiting head 31 close to the measuring head 3 fits against the bottom surface of the limiting groove 26.

[0037] One end of the measuring head 3 is coaxially provided with a limiting head 31, and two planes 310 are evenly distributed on the outer circumferential surface of the limiting head 31. Two inclined planes 30 are evenly distributed at one end of the measuring head 3 away from the limiting head 31 to sharpen it. Two inclined planes 30 are evenly distributed at one end of the measuring head 3 away from the limiting head 31 to sharpen it, which helps to improve the positioning accuracy of the measuring head 3 for the long bolt 1.

[0038] After one end of the measuring head 3 provided with the inclined plane 30 passes through the positioning hole B27 and extends into the groove 20, the measuring head 3 is locked and fixed by the screw C8.

[0039] The working principle or the using process of the long bolt taper measuring tool of the present utility model is as follows:

[0040] Put the long bolt 1 into the measuring tool, position the φ8.7 outer circle on the long bolt 1 through the bottom surface of the U-shaped notch 40 on the positioning block 4, and position the outer circle of the large end of the taper on the long bolt 1 through the bottom surface of the groove 20, so as to ensure that the central axis of the long bolt 1, the central axis of the measuring head 3, and the central axis of the probe of the dial indicator 6 are on a plane parallel to the bottom surface of the groove 20; make the reference surface 100 on the long bolt 1 fit against the side surface of the positioning block 4 away from the base 2, and make the taper on the long bolt 1 contact with the measuring head 3, then the tolerance value of the taper diameter at 52 mm away from the head of the long bolt can be read through the dial indicator 6, and then it can be judged whether the taper diameter at 52 mm away from the head of the long bolt meets the dimensional requirements.

Claims

1. A long bolt cone measuring tool, characterized in that: The invention comprises a base (2), a measuring head (3) and a micrometer (6); a groove (20) is provided on the top of the base (2); a positioning assembly is provided on the base (2) at one end of the groove (20); the measuring head (3) and the micrometer (6) are both arranged on the base (2); the measuring head (3) and the micrometer (6) are coaxially arranged, and the measuring head (3) and the micrometer (6) are both partially extended into the groove (20).

2. The long bolt cone measuring tool according to claim 1, characterized in that: The groove (20) is a rectangular groove, a positioning groove (21) is provided on the base (2) at one end of the groove (20), and a threaded hole A (22) is provided on the bottom surface of the positioning groove (21).

3. The long bolt cone measuring tool as claimed in claim 2, characterized in that: The positioning assembly comprises a positioning block (4), and the positioning block (4) is fixed on the base (2) by means of screws A (5).

4. The long bolt cone measuring tool as claimed in claim 3, characterized in that: The positioning block (4) is matched with the positioning groove (21).

5. The long bolt cone measuring tool as claimed in claim 3, characterized in that: The positioning block (4) is provided with a U-shaped notch (40), and the positioning block (4) is provided with an elongated hole (41) at a position corresponding to the screw A (5).

6. The long bolt cone measuring tool according to claim 1, characterized in that: The base (2) is provided with a positioning hole A (23) on one side of the groove (20), and the positioning hole A (23) is arranged perpendicular to the groove (20); the base (2) is provided with a threaded hole B (24), one end of the threaded hole B (24) is connected to the positioning hole A (23), the threaded hole B (24) is arranged perpendicular to the positioning hole A (23), and a screw B (7) is threadedly connected to the threaded hole B (24).

7. The long bolt cone measuring tool according to claim 6, characterized in that: After the probe of the micrometer (6) passes through the positioning hole A (23) and extends into the groove (20), the probe is locked and fixed by the screw B (7).

8. The long bolt cone measuring tool according to claim 1, characterized in that: The base (2) is provided with a positioning hole B (27), the positioning hole B (27) is coaxially arranged with the positioning hole A (23), and the positioning hole B (27) and the positioning hole A (23) are located on both sides of the groove (20), the base (2) is provided with a limiting groove (26) at one end of the positioning hole B (27) away from the groove (20), the base (2) is provided with a threaded hole C (25), one end of the threaded hole C (25) is connected with the positioning hole B (27), the threaded hole C (25) and the positioning hole B (27) are arranged vertically, and a screw C (8) is threadedly connected to the threaded hole C (25).

9. The long bolt cone measuring tool as claimed in claim 8, characterized in that: A limit head (31) is coaxially arranged at one end of the measuring head (3), two planes (310) are evenly arranged on the outer circumferential surface of the limit head (31), and two inclined surfaces (30) are evenly arranged at one end of the measuring head (3) away from the limit head (31) to sharpen it.

10. The long bolt cone measuring tool according to claim 9, characterized in that: After one end of the measuring head (3) provided with the inclined surface (30) passes through the positioning hole B (27) and extends into the groove (20), the measuring head (3) is locked and fixed by a screw C (8).

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