CN218916169U

CN218916169U - Auxiliary tool for measuring precise hole of step

Info

Publication number: CN218916169U
Application number: CN202223475923.1U
Authority: CN
Inventors: ***; 江媛; 王刚; 余军; 万翔; 谢云龙; 冯琦; 曹爱萍; 刘杨阳; 彭郁轩; 温建林; 危震坤; 柯王华
Original assignee: Jiangxi Hongdu Aviation Industry Group Co Ltd
Current assignee: Jiangxi Hongdu Aviation Industry Group Co Ltd
Priority date: 2022-12-26
Filing date: 2022-12-26
Publication date: 2023-04-25
Anticipated expiration: 2032-12-26

Abstract

The utility model discloses an auxiliary tool for measuring a precise hole of a step, which comprises a precise hole standard ring, a measuring contact I, a measuring contact II, a measuring contact III, a measuring block I, a measuring block II, a connecting rod I, an adjusting bolt, a fastening nut, a dial indicator, a fastening bolt, an elastic clamp and a connecting rod II, wherein the measuring contact I, the measuring contact II and the measuring contact III are respectively arranged on the end parts of the measuring block I and the measuring block II, the measuring contact I, the measuring contact II and the measuring contact III are in contact with an inner hole of the precise hole standard ring, the two connecting rods are fixedly connected with the measuring block I and are movably connected with the measuring block II, the dial indicator is fixed on the measuring block II through the fastening bolt, the adjusting bolt is fixed on the measuring block I through the fastening nut, and the two ends of the elastic clamp are respectively fixed on the measuring block I and the measuring block II; the utility model has the advantages that: the device has the advantages of convenient measurement, universality, simple structure, short design period, relatively simple adjustment, assembly and disassembly, and convenient preservation and management.

Description

Auxiliary tool for measuring precise hole of step

Technical Field

The utility model relates to the technical field of machining, in particular to an auxiliary tool for measuring a precise hole of a step.

Background

In the aircraft structure, more step precision holes exist, and special measuring tools (such as three-jaw inside micrometer) are generally adopted for measurement, but in the aircraft structure design, the more step precision holes with shallower depth are designed in consideration of installation, performance and other factors. The step precise holes are generally formed by boring, and the step precise holes meeting the design requirements can be processed by measuring the aperture and adjusting the size of a boring cutter for a plurality of times. Because the step is shallow, special accurate measuring tool can't measure accurate hole aperture, and slide caliper measurement accuracy does not satisfy the requirement. In the mass production process of the aircraft structural member, the measurement efficiency of the step precise hole needs to be improved, so that an auxiliary tool for measuring the step precise hole is urgently needed to realize measurement and improve the measurement efficiency when boring the step precise hole with smaller depth.

In chinese patent: patent No. 201920939689.2, the patent literature entitled "an auxiliary tool for measuring a precision hole" discloses a precision hole standard block, a measuring contact I, a measuring contact II, a measuring contact III, a measuring rod I, a measuring rod II and a dial indicator, and the measured hole diameter is positioned by three measuring contacts; the positions of the two measuring rods can be adjusted through the waist-shaped holes, so that measurement of different apertures is realized, and the two measuring rods are fixed through fastening bolts; fixing a measuring rod by measuring a precision hole standard block with the diameter similar to that of the measured hole, wherein the hole diameter of the standard block is measured by a measuring contact; fixing the dial indicator on one side of the measuring rod through a fastening screw, propping the dial indicator measuring head on the other side of the measuring rod, and zeroing the dial indicator; slightly loosening the fastening bolt, measuring the measured aperture, adjusting the dial indicator measuring head, reading the reading on the dial indicator, wherein the change value of the dial indicator is the aperture error value, and the value of the measured aperture can be obtained according to the aperture theoretical value; the patent realizes measurement by the lever principle, and has the following defects: (1) the two measuring rods can deviate only at a small angle, the measuring contact is not perpendicular to the measuring rods, the precision is low, and the high-precision hole measurement requirement is not met; (2) the two measuring rods can measure the limited aperture of the precise hole; (3) when measuring the precision holes with different sizes, the dial indicator needs to be disassembled and assembled, namely the dial indicator needs to be taken out from the standard block after the fastening bolts are slightly loosened, and then the actual size is measured.

Disclosure of Invention

Aiming at the prior art, the utility model aims to overcome the defects in the prior art and adapt to the actual needs, thereby providing the auxiliary measuring tool which can realize the measurement of the precise holes with different apertures within a certain range, has universality, can solve the problem of low batch processing efficiency of the precise holes of the steps and can conveniently measure the outer holes of the precise holes of the steps.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the auxiliary tool for measuring the precise hole of the step comprises a precise hole standard ring, a measuring contact I, a measuring contact II, a measuring contact III, a measuring block I and a measuring block II, wherein the measuring contact I and the measuring contact II are arranged at one end part of the measuring block I, the measuring contact III is arranged at one end part of the measuring block II, and the measuring contact I, the measuring contact II and the measuring contact III are in contact with the circumferential surface of an inner hole of the precise hole standard ring and are positioned on the circumference of the same horizontal height; still include connecting rod I, adjusting bolt, fastening nut, percentage table, fastening bolt, elasticity presss from both sides and connecting rod II, I one end of connecting rod and measuring block I lower extreme fixed connection, the other end and measuring block II lower extreme swing joint, II one ends of connecting rod and measuring block I upper end fixed connection, the other end and measuring block II upper end swing joint, percentage table is fixed in measuring block II through fastening bolt on, adjusting bolt is fixed in measuring block I through fastening nut on, and percentage table and adjusting bolt are located same level, elasticity presss from both sides both ends and is fixed in measuring block I and measuring block II respectively.

Further, the measuring block I and the measuring block II are of cuboid block structures, and holes respectively used for the connecting rod II and the connecting rod I to penetrate are formed in the upper end and the lower end of the measuring block I and the measuring block II.

Further, the measuring contact I and the measuring contact II are perpendicular to the side face of the measuring block I, and the measuring contact III is perpendicular to the side face of the measuring block II.

Further, the measuring block I and the measuring block II are arranged in parallel with each other.

Further, the elastic clamp is positioned at the upper ends of the dial indicator and the adjusting bolt.

Further, the measuring head of the dial indicator is propped against the right end of the adjusting bolt.

Further, adjusting the adjusting bolt can measure the precise holes with different apertures.

Further, the measuring contact I, the measuring contact II and the measuring contact III are in contact with the circumferential surface of the inner hole of the measured workpiece and are positioned on the circumference with the same horizontal height.

The design principle of the utility model is as follows: the measurement is realized through parallel movement, three measuring contacts (namely a measuring contact I, a measuring contact II and a measuring contact III) are designed on the measuring block I and the measuring block II in total, and the measured hole diameter is positioned through the three measuring contacts; the two measuring blocks (namely the measuring block I and the measuring block II) are connected through the connecting rod I and the connecting rod II, meanwhile, the connecting rod is connected to one end of the measuring block I to be a fixed end, so that the stability of a tool during measurement is guaranteed, the connecting rod is connected to one end of the measuring block II to be a movable end, the measuring block can be retracted and extended through the elastic clamp, meanwhile, the inner diameter of a measured hole can be tightly attached when three measuring contacts are used for measurement, and the aperture of the standard ring is measured through a precision hole standard ring with the diameter similar to that of the measured hole; the dial indicator is fixed on the measuring block II through a fastening bolt, a dial indicator measuring head is propped against an adjusting bolt, the dial indicator is zeroed, a fastening nut is screwed, the measured aperture is measured, the reading on the dial indicator is read, the change value of the dial indicator is an aperture error value, the value of the measured aperture can be obtained according to the aperture theoretical value, and different apertures can be measured through adjusting the adjusting bolt.

The beneficial effects of the utility model are as follows:

(1) The measuring is convenient, the operation is simple, and the measuring efficiency is improved, so that the boring efficiency is improved;

(2) The measurement of the precision holes with different sizes can be satisfied by adjusting the adjusting bolts according to the parallel motion principle, the measurement precision is higher without disassembling the dial indicator, the measurement of the precision holes with different apertures in a certain range can be realized, and the universal precision measuring device has universality;

(3) The tool has the advantages of simple structure, short design period, relatively simple adjustment, assembly and disassembly, and convenient preservation and management.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic representation of the use of the present utility model.

Wherein: 1-a precision bore standard ring; 2-measuring contact I; 3-measuring contact II; 4-measuring contact III; 5-measuring block I; 6-measuring block II; 7-connecting rod I; 8-adjusting bolts; 9-tightening the nut; 10-percent meter; 11-fastening bolts; 12-an elastic clip; 13-connecting rod II; 14-the workpiece being measured.

Detailed Description

The following describes specific embodiments of the present utility model in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the utility model, are not intended to limit the utility model.

In the description of the present application, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "vertical", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description of the present application and for simplification of the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

Furthermore, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "configured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

It will be further understood that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product, apparatus, process, or method that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such product, apparatus, process, or method as desired. Without further limitation, an element defined by the phrase "comprising/including … …" does not exclude the presence of other like elements in a product, apparatus, process or method comprising the element.

Examples

As shown in fig. 1 to 2, the utility model provides an auxiliary tool for measuring a step precision hole, which comprises a precision hole standard ring 1, a measuring contact I2, a measuring contact II 3, a measuring contact III 4, a measuring block I5 and a measuring block II 6, wherein the measuring contact I2 and the measuring contact II 3 are arranged at one end part of the measuring block I5, the measuring contact III 4 is arranged at one end part of the measuring block II 6, and the measuring contact I2, the measuring contact II 3 and the measuring contact III 4 are in contact with the circumferential surface of an inner hole of the precision hole standard ring 1 and are positioned on the circumference with the same horizontal height; still include connecting rod I7, adjusting bolt 8, fastening nut 9, percentage table 10, fastening bolt 11, elastic clamp 12 and connecting rod II 13, connecting rod I7 one end and measuring block I5 lower extreme fixed connection, the other end and measuring block II 6 lower extreme swing joint, connecting rod II 13 one end and measuring block I5 upper end fixed connection, the other end and measuring block II 6 upper end swing joint, percentage table 10 is fixed in measuring block II 6 through fastening bolt 11, adjusting bolt 8 is fixed in measuring block I5 through fastening nut 9, and percentage table 10 and adjusting bolt 8 are located same level, elastic clamp 12 both ends are fixed in respectively on measuring block I5 and measuring block II 6.

Preferably, the measuring block I5 and the measuring block II 6 are of cuboid block structures, and holes respectively used for the connecting rod I7 and the connecting rod II 13 to penetrate are formed in the upper end and the lower end of the measuring block.

Preferably, both the measuring feeler i 2 and the measuring feeler ii 3 are perpendicular to the side of the measuring block i 5, and the measuring feeler iii 4 is perpendicular to the side of the measuring block ii 6.

Preferably, the measuring blocks I5 and II 6 are arranged parallel to one another.

Preferably, the spring clip 12 is located at the upper end of the dial indicator 10 and the adjustment bolt 8.

Preferably, the measuring head of the dial indicator 10 is propped against the right end of the adjusting bolt 8, and the measuring head of the dial indicator 10 can be propped against the right end of the adjusting bolt 8 by adjusting the adjusting bolt 8, so that the zeroing of the dial indicator 10 is realized.

Preferably, the precise holes of different diameters can be measured by adjusting the adjusting bolt 8.

Preferably, the measuring feeler i 2, the measuring feeler ii 3 and the measuring feeler iii 4 are in contact with the circumferential surface of the internal bore of the workpiece 14 to be measured and are on the same level circumference.

In the utility model, the elastic clamp 12 can be used for realizing the retraction and the extension of the measuring blocks I5 and II 6, and can also ensure that the measuring contacts I2, II 3 and III 4 are tightly attached to the inner diameter of a measured hole during the measurement.

In the utility model, the ends of the measuring block I5 and the measuring block II 6 are respectively provided with the measuring contact I2, the measuring contact II 3 and the measuring contact III 4, the measuring block I5 and the measuring block II 6 are connected through the connecting rod I7 and the connecting rod II 13, meanwhile, the connecting rod is connected with one end of the measuring block I5 to be a fixed end, the stability of a tool during measurement is ensured, one end of the connecting rod is connected with one end of the measuring block II 6 to be a movable end, and the retraction and the extension of the measuring block I5 and the measuring block II 6 can be realized through the elastic clamp 12, and meanwhile, the inner diameters of measured holes can be tightly adhered during the measurement of the measuring contact I2, the measuring contact II 3 and the measuring contact III 4. The diameter of the standard ring is measured by measuring the precision hole standard ring 1 with the diameter similar to the measured diameter, and the measuring contact at the moment is the diameter of the standard ring; the dial indicator 10 is fixed on the measuring block II 6 through the fastening bolt 11, the measuring head of the dial indicator 10 is propped against the adjusting bolt 8, the dial indicator 10 is zeroed, after the dial indicator 10 is zeroed, the fastening nut 9 is screwed down, the measured hole diameter is measured, and the reading of the dial indicator 10 is the error value of the measured hole.

The specific use process of the utility model is as follows:

a. a precision hole standard ring 1 which is close to the aperture of a machining hole is prepared before boring;

b. the measuring contact I2, the measuring contact II 3 and the measuring contact III 4 of the mounted step precision hole measuring auxiliary tool are clamped at the inner side of the hole of the precision hole standard ring 1, the adjusting bolt 8 is adjusted to enable the measuring head of the dial indicator 10 to be propped against the adjusting bolt 8, the dial indicator 10 is zeroed, the fastening nut 9 is screwed after the dial indicator 10 is zeroed, and at the moment, the values of the inner holes of the precision hole standard ring 1 are measured by the three measuring contacts;

c. removing the precision hole standard ring 1;

d. boring, namely boring a hole of the measured workpiece 14 to be a measured hole;

e. c, clamping a measuring contact I2, a measuring contact II 3 and a measuring contact III 4 of the step precise hole measuring auxiliary tool regulated in the steps a to c on the inner side of a hole of a measured workpiece 14, and checking the reading of a dial indicator 10 to obtain an error value of the measured hole;

f. taking out the auxiliary measuring tool;

g. repeating the steps d, e and f until the measured hole reaches the required precision.

The foregoing describes specific embodiments of the present utility model. It is to be understood that the utility model is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the utility model. The embodiments of the present application and features in the embodiments may be combined with each other arbitrarily without conflict.

Claims

1. The auxiliary tool for measuring the precise hole of the step comprises a precise hole standard ring, a measuring contact I, a measuring contact II, a measuring contact III, a measuring block I and a measuring block II, wherein the measuring contact I and the measuring contact II are arranged at one end part of the measuring block I, the measuring contact III is arranged at one end part of the measuring block II, and the measuring contact I, the measuring contact II and the measuring contact III are in contact with the circumferential surface of an inner hole of the precise hole standard ring and are positioned on the circumference of the same horizontal height; the method is characterized in that: still include connecting rod I, adjusting bolt, fastening nut, percentage table, fastening bolt, elasticity presss from both sides and connecting rod II, I one end of connecting rod and measuring block I lower extreme fixed connection, the other end and measuring block II lower extreme swing joint, II one ends of connecting rod and measuring block I upper end fixed connection, the other end and measuring block II upper end swing joint, percentage table is fixed in measuring block II through fastening bolt on, adjusting bolt is fixed in measuring block I through fastening nut on, and percentage table and adjusting bolt are located same level, elasticity presss from both sides both ends and is fixed in measuring block I and measuring block II respectively.

2. The step precision hole measurement auxiliary tool according to claim 1, wherein: the measuring block I and the measuring block II are of cuboid block structures, and holes respectively used for the connecting rod II and the connecting rod I to penetrate through are formed in the upper end and the lower end of the measuring block I and the measuring block II.

3. The step precision hole measurement auxiliary tool according to claim 1, wherein: the measuring contact I and the measuring contact II are perpendicular to the side face of the measuring block I, and the measuring contact III is perpendicular to the side face of the measuring block II.

4. The step precision hole measurement auxiliary tool according to claim 1, wherein: the measuring block I and the measuring block II are arranged in parallel.

5. The step precision hole measurement auxiliary tool according to claim 1, wherein: the elastic clamp is positioned at the upper ends of the dial indicator and the adjusting bolt.

6. The step precision hole measurement auxiliary tool according to claim 1, wherein: the measuring head of the dial indicator is propped against the right end part of the adjusting bolt.

7. The step precision hole measurement auxiliary tool according to claim 1, wherein: the adjusting bolt can be used for measuring the precise holes with different apertures.

8. The step precision hole measurement auxiliary tool according to claim 1, wherein: the measuring contact I, the measuring contact II and the measuring contact III are in contact with the circumferential surface of the inner hole of the measured workpiece and are positioned on the circumference of the same horizontal height.