阅读说明：本技术 应用于内径测量的弹片式气动测量装置 (Elastic sheet type pneumatic measuring device applied to inner diameter measurement ) 是由 朱彦 糜佳 于 2021-07-05 设计创作，主要内容包括：本发明涉及内孔测量技术领域,尤其涉及应用于内径测量的弹片式气动测量装置,包括测量头、操作手柄和定位安装部；测量头包括测量头主体、喷头、弹性挡板和弹性触点；测量头主体上沿轴向开设有用于连通外部气源的进气通道；测量头主体上沿径向开设有出气通道；弹性挡板设置于安装槽内；喷头设置于弹性挡板的后端。本发明通过弹性挡板的自身弹性形变使得测量头主体接触被测面,同时与弹性挡板后侧的喷头产生间隙,并基于测量气压与参考气压之间的差值以及校准件,即能计算出待测孔的孔径,其结构设计简单合理,且弹性挡板的弹性形变能够灵敏反应待测孔的细微变化,进而大幅提升气动测量装置的测量精度。(The invention relates to the technical field of inner hole measurement, in particular to a spring sheet type pneumatic measuring device applied to inner diameter measurement, which comprises a measuring head, an operating handle and a positioning installation part; the measuring head comprises a measuring head main body, a spray head, an elastic baffle and an elastic contact; an air inlet channel for communicating an external air source is axially arranged on the measuring head main body; an air outlet channel is radially arranged on the measuring head main body; the elastic baffle is arranged in the mounting groove; the nozzle is arranged at the rear end of the elastic baffle. According to the invention, the measuring head main body is in contact with the measured surface through the self elastic deformation of the elastic baffle, a gap is generated between the measuring head main body and the spray head at the rear side of the elastic baffle, the aperture of the hole to be measured can be calculated based on the difference between the measured air pressure and the reference air pressure and the calibration piece, the structural design is simple and reasonable, and the elastic deformation of the elastic baffle can sensitively reflect the slight change of the hole to be measured, so that the measuring precision of the pneumatic measuring device is greatly improved.)

1. A spring sheet type pneumatic measuring device applied to inner diameter measurement is characterized by comprising a measuring head matched with a workpiece to be detected, a sleeve-shaped operating handle and a positioning installation part; two ends of the operating handle are respectively connected with the measuring head and the positioning installation part;

the measuring head comprises a measuring head main body, a spray head, an elastic baffle and an elastic contact; the measuring head main body is connected with the operating handle, an air inlet channel for communicating an external air source is axially arranged on the measuring head main body, and the air inlet channel penetrates through the operating handle and the positioning installation part; an air outlet channel is radially arranged on the measuring head main body, one end of the air outlet channel is communicated with the air inlet channel, and the other end of the air outlet channel penetrates through the surface of the measuring head main body; the measuring head main body is provided with a mounting groove, and the elastic baffle is arranged in the mounting groove; the spray head is arranged at the rear end of the elastic baffle plate and communicated with the other end of the air outlet channel; the elastic contact is arranged in the mounting groove, and the elastic contact is arranged at one end of the elastic baffle.

2. The elastic sheet type pneumatic measuring device for inner diameter measurement as claimed in claim 1, wherein the outlet channel is opened at two or more positions, and the outlet channels are opened at the same plane of the measuring head body.

3. The pneumatic measuring device of claim 1, wherein the measuring head further comprises an end cap; the end cover is arranged at the end part of the measuring head main body through an inner hexagonal socket head cap screw; the outer edge of the end cover is provided with a plurality of uniformly distributed air blowing grooves.

4. The pneumatic spring plate type measuring device for inner diameter measurement as claimed in claim 1, wherein the elastic contact is in a quadrangular frustum pyramid structure.

5. The elastic sheet type pneumatic measuring device applied to inner diameter measurement according to claim 1, wherein one end of the elastic baffle is arranged in the mounting groove through a connecting screw, and the other end of the elastic baffle is provided with a limit screw.

6. The pneumatic measuring device of claim 1, wherein the measuring head body has a plurality of arc-shaped slots formed on an outer circumferential surface thereof.

7. The pneumatic spring plate type measuring device for inner diameter measurement as claimed in claim 1, wherein the positioning and mounting portion has a cylindrical structure, and a plurality of mounting holes are formed on the positioning and mounting portion.

8. The pneumatic measuring device of claim 1, wherein the measuring head body and the operating handle are integrally formed.

Technical Field

The invention relates to the technical field of inner hole measurement, in particular to a spring plate type pneumatic measuring device applied to inner diameter measurement.

Background

The pneumatic measuring instrument is used as a precise measuring instrument and matched with a pneumatic measuring head, and the inner diameter of a processed workpiece can be measured by using a comparative measuring method, and the working principle is as follows: the pneumatic measuring head is provided with an air outlet hole, the air outlet hole is connected with compressed air through an air inlet air passage, the pneumatic measuring head is positioned in a measured workpiece during measurement, the air outlet hole is close to a measurement point of the measured workpiece, a gap exists between the measuring head and the measured workpiece, and the compressed air escapes from the gap. The change of the air pressure can be caused by the change of the gaps with different sizes, the gas-electric converter converts the pressure change into related electric signals to the data processing element, and the data are processed by utilizing the single-chip computer technology, so that the change quantity of the measured size relative to the standard size can be directly indicated on the digital display screen and the color light column.

In the automobile manufacturing industry, the inner diameters of various holes on automobile parts are often required to be measured to ensure the processing quality, however, at present, a pneumatic measuring head for measuring the automobile parts usually measures a workpiece through an air outlet hole with a specific diameter, point contact cannot be made, and a large measuring error exists for a measured workpiece with large surface roughness.

Disclosure of Invention

Aiming at the technical problems, the invention provides the elastic sheet type pneumatic measuring device applied to inner diameter measurement, which aims to solve the problems that a pneumatic measuring head used for measuring automobile parts in the prior art usually measures a workpiece through an air outlet hole with a specific diameter, cannot measure the highest point of the part, and has larger measurement error for the measured workpiece with larger surface roughness.

In order to achieve the purpose, the invention adopts the technical scheme that:

the invention provides a spring sheet type pneumatic measuring device applied to inner diameter measurement, which comprises a measuring head matched with a workpiece to be detected, a sleeve-shaped operating handle and a positioning installation part, wherein the sleeve-shaped operating handle is arranged on the measuring head; two ends of the operating handle are respectively connected with the measuring head and the positioning installation part; the measuring head comprises a measuring head main body, a spray head, an elastic baffle and an elastic contact; the measuring head main body is connected with the operating handle, an air inlet channel for communicating an external air source is axially arranged on the measuring head main body, and the air inlet channel penetrates through the operating handle and the positioning installation part; an air outlet channel is radially arranged on the measuring head main body, one end of the air outlet channel is communicated with the air inlet channel, and the other end of the air outlet channel penetrates through the surface of the measuring head main body; the measuring head main body is provided with a mounting groove, and the elastic baffle is arranged in the mounting groove; the spray head is arranged at the rear end of the elastic baffle plate and communicated with the other end of the air outlet channel; the elastic contact is arranged in the mounting groove, and the elastic contact is arranged at one end of the elastic baffle.

Furthermore, two or more air outlet channels are arranged on the same plane of the measuring head main body.

Further, the measuring head further comprises an end cap; the end cover is arranged at the end part of the measuring head main body through an inner hexagonal socket head cap screw; the outer edge of the end cover is provided with a plurality of uniformly distributed air blowing grooves.

Further, the elastic contact is in a quadrangular frustum pyramid structure.

Furthermore, one end of the elastic baffle plate is arranged in the mounting groove through a connecting screw, and the other end of the elastic baffle plate is provided with a limiting screw.

Furthermore, a plurality of arc-shaped grooves which are uniformly distributed are formed in the outer circumferential surface of the measuring head main body.

Further, the location installation department is cylindric structure, a plurality of installation locating hole has been seted up on the location installation department.

Further, the measuring head body and the operating handle are of an integrated structure.

The technical scheme has the following advantages or beneficial effects:

the invention provides a spring sheet type pneumatic measuring device applied to inner diameter measurement, which comprises a measuring head matched with a workpiece to be measured, a sleeve-shaped operating handle and a positioning installation part, wherein the sleeve-shaped operating handle is arranged on the measuring head; two ends of the operating handle are respectively connected with the measuring head and the positioning installation part; the measuring head comprises a measuring head main body, a spray head, an elastic baffle and an elastic contact; the measuring head main body is connected with the operating handle, an air inlet channel for communicating an external air source is axially arranged on the measuring head main body, and the air inlet channel penetrates through the operating handle and the positioning installation part; an air outlet channel is radially arranged on the measuring head main body, one end of the air outlet channel is communicated with the air inlet channel, and the other end of the air outlet channel penetrates through the surface of the measuring head main body; the measuring head main body is provided with a mounting groove, and the elastic baffle is arranged in the mounting groove; the spray head is arranged at the rear end of the elastic baffle plate and communicated with the other end of the air outlet channel; the elastic contact is arranged in the mounting groove and arranged at one end of the elastic baffle. The invention adopts the elastic baffle, the elastic baffle deforms through self elastic deformation to enable the measuring head main body to contact the measured surface, a gap is generated between the measuring head main body and the spray head at the rear side of the elastic baffle, the measuring pressure corresponding to the measuring gap is obtained through the pressure measuring mechanism, and the aperture of the hole to be measured can be calculated based on the difference value between the measuring pressure and the reference pressure and the size of the calibration piece.

Drawings

The invention and its features, aspects and advantages will become more apparent from reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference symbols in the various drawings indicate like elements. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention.

FIG. 1 is a schematic diagram of a partial three-dimensional structure of a spring-type pneumatic measuring device applied to inner diameter measurement provided in example 1 of the present invention;

FIG. 2 is a front view of a spring plate type pneumatic measuring device applied to inner diameter measurement provided in embodiment 1 of the present invention;

FIG. 3 is a left side view of a spring plate type pneumatic measuring device applied to inner diameter measurement provided in embodiment 1 of the present invention;

fig. 4 is a right side view of the elastic sheet type pneumatic measuring device applied to inner diameter measurement provided in embodiment 1 of the present invention.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application.

It will be understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

As used herein, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like are used in the positional or orientational relationship illustrated in the figures to facilitate the description of the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention.

The appearances of the terms first, second, and third, if any, are used for descriptive purposes only and are not intended to be limiting or imply relative importance.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The technical solutions in the embodiments of the present invention are described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the invention without making creative efforts, belong to the protection scope of the invention.

Example 1:

in the automobile manufacturing industry, the inner diameters of various holes on automobile parts are often required to be measured to ensure the processing quality, however, the highest point of a measured part which cannot be measured is usually measured by an air outlet hole with a specific diameter of a workpiece of a pneumatic measuring head which is used for measuring an inner hole with a large surface roughness of the automobile parts in the prior art, and the measured workpiece with the large surface roughness has a large measuring error.

In order to solve the above technical problem, an elastic sheet type pneumatic measuring device applied to inner diameter measurement provided in embodiment 1 of the present invention is understood with reference to fig. 1 to 4, and includes a measuring head 1 engaged with a workpiece to be measured, a sleeve-shaped operating handle 2, and a positioning and mounting portion 3; two ends of the operating handle 2 are respectively connected with the measuring head 1 and the positioning installation part 3; the measuring head 1 comprises a measuring head body 11, a spray head 12, an elastic baffle 13 and an elastic contact 14; the measuring head main body 11 is connected with the operating handle 2, an air inlet channel 111 for communicating an external air source is axially arranged on the measuring head main body 11, and the air inlet channel 111 penetrates through the operating handle 2 and the positioning installation part 3; an air outlet channel 112 is radially arranged on the measuring head main body 11, one end of the air outlet channel 112 is communicated with the air inlet channel 111, and the other end of the air outlet channel 112 penetrates through the surface of the measuring head main body 11; the measuring head main body 11 is provided with a mounting groove 113, and the elastic baffle 13 is arranged in the mounting groove 113; the spray head 12 is arranged at the rear end of the elastic baffle 13, and the spray head 12 is communicated with the other end of the air outlet channel 112; the elastic contact 14 is disposed in the mounting groove 113, and the elastic contact 14 is disposed at one end of the elastic barrier 13. Two or more air outlet channels 112 are provided, and the air outlet channels 112 are provided on the same plane of the measuring head body 11.

The invention provides a spring sheet type pneumatic measuring device applied to inner diameter measurement, when in use, one end of an air inlet channel 111 at a positioning installation part 3 is connected with a pneumatic measuring instrument through a rubber hose, a measuring head main body 11 is inserted into a hole to be detected of a workpiece, a gap exists between the measuring head main body 11 and the hole to be detected, the gap is determined by the size of the hole to be detected and the size of the measuring head main body 11, when in measurement, the pneumatic measuring instrument supplies compressed air into the air inlet channel 111, the compressed air respectively enters a plurality of air outlet channels 112, then enters a gap between an elastic baffle 13 and the hole wall of the hole to be detected through corresponding nozzles 12, the gap generates air flow and generates air pressure change, then an air pressure signal is converted into an electric signal by an air-electric converter and displayed, an operator obtains a gap value by monitoring the change of the air flow of different gaps and compares the gap value with a calibration piece, the true detection value can be obtained. The invention adopts the elastic baffle 13, the measuring head main body 11 is in contact with the measured surface through the self elastic deformation of the elastic baffle 13, a gap is generated between the measuring head main body and the spray head 12 at the rear side of the elastic baffle 13, the measuring air pressure corresponding to the measuring gap is obtained through the pressure measuring mechanism, and the aperture of the hole to be measured can be calculated based on the difference value between the measuring air pressure and the reference air pressure and the size of the calibration piece, compared with the pneumatic measuring head in the prior art, the structure design is simpler and more reasonable, thereby reducing the manufacturing difficulty of the pneumatic measuring head to a greater extent, the elastic deformation of the elastic baffle 13 can sensitively reflect the slight change of the hole to be measured, thereby greatly improving the measuring precision of the pneumatic measuring device, solving the problems that the pneumatic measuring head for measuring automobile parts in the prior art is generally more complex in structure, complicated in operation and lower in measuring efficiency, and the manufacturing cost is high.

Further, the measuring head 1 also comprises an end cap 15; the end cover 15 is arranged at the end part of the measuring head main body 11 through an inner hexagonal socket head cap screw; the outer edge of the end cover 15 is provided with a plurality of air blowing grooves 151 which are uniformly distributed. Because the pneumatic measuring device has higher requirements on the measuring environment in the hole, in order to ensure that the pneumatic measuring device can normally work, the end cover 15 and the air blowing groove 151 are arranged, before measurement is carried out, air blowing and ash cleaning operations can be carried out on the measured hole, the influence on the normal work of the measuring device and the accuracy of a measuring result due to the existence of dust particles or other impurities in the hole is avoided, and the working reliability of the pneumatic measuring device is further improved; in addition, the end cover 15 and the measuring head body 11 are of a split structure, and when the measuring head 1 fails or needs to be maintained, the measuring head can be conveniently overhauled and maintained.

Further, the elastic contact 14 has a quadrangular frustum pyramid-shaped structure. Because measuring head main part 11 is less with the clearance between them of the hole that awaits measuring, consequently, through setting up elastic contact 14 that is four prismatic table column structures, cut some non-working surface, can reduce the influence of circularity on the one hand to insert the hole that awaits measuring when being convenient for measuring head main part 11 detects, on the other hand also avoids the internal face in fish tail hole of awaiting measuring, further improves pneumatic measuring device's work fail safe nature, reduces the damage to the work piece that awaits measuring.

Further, one end of the elastic baffle 13 is disposed in the mounting groove 113 through a connection screw 131, and the other end of the elastic baffle 13 is disposed with a limit screw 132. Through the connecting screw 131 that sets up one end for elastic baffle 13 can set up in mounting groove 113 reliably, and the deformation that elastic baffle 13 can be restricted to within the predetermined range then to the setting of other end stop screw 132, thereby further guarantee pneumatic measuring device's operational reliability.

Further, the measuring head body 11 has a plurality of arc-shaped slots 114 formed on an outer circumferential surface thereof. Similarly, because measuring head main part 11 is less with the clearance between them of the hole that awaits measuring, consequently, through seting up a plurality of evenly distributed's arc wall 114, can cut some non-working surfaces on the measuring head main part 11, can reduce the influence of circularity on the one hand to insert the downthehole that awaits measuring when being convenient for measuring head main part 11 detects, on the other hand also avoids the internal face in fish tail hole of awaiting measuring, further improves pneumatic measuring device's work fail safe nature, reduces the damage to the work piece that awaits measuring.

Further, the positioning installation part 3 is a cylindrical structure, and a plurality of installation positioning holes 31 are formed in the positioning installation part 3. Through setting up a plurality of installation locating hole 31, when carrying out the installation of each part of measuring head 1, operating personnel can realize the location rapidly through the installation locating hole 31 on the location installation department 3 to the installation effectiveness of measuring head 1 has been improved to a great extent. Specifically, set up the blind hole 32 that a plurality of operating personnel of being convenient for distinguish different model accessories fast on the location installation department 3 in this embodiment to scribble the look and distinguish, thereby be convenient for the measurement personnel to correspond fast in order to carry out detection operation.

Further, the measuring head body 11 and the operating handle 2 are of an integral structure. Through setting up measuring head main part 11 and the operating handle 2 that is the integral type structure to be favorable to improving measuring head main part 11 and operating handle 2's overall structure intensity, further improve pneumatic measuring device's operational reliability, in this embodiment, measuring head main part 11 also can be split type with operating handle 2, specifically can select according to actual production manufacturing conditions.

Furthermore, the measuring head main body 11 and the nozzle 12 are made of high-hardness wear-resistant materials, such as high manganese steel, high manganese alloy, ultra-high manganese alloy or wear-resistant alloy steel, and the wear-resistant materials can effectively reduce or eliminate the influence of the deformation of the nozzle 12 and the measuring head main body 11 on the gap between the nozzle 12 and the hole to be measured, so that the measuring accuracy of the pneumatic measuring device is further improved.

In summary, according to the elastic sheet type pneumatic measuring device applied to inner diameter measurement provided by the invention, the elastic baffle plate deforms by itself to enable the measuring head body to contact the measured surface, a gap is generated between the measuring head body and the nozzle on the rear side of the elastic baffle plate, the measuring pressure corresponding to the measuring gap is obtained through the pressure measuring mechanism, the aperture of the hole to be measured can be calculated based on the difference between the measuring pressure and the reference pressure and the size of the calibration piece, compared with the pneumatic measuring head in the prior art, the elastic baffle plate can be enabled to contact with the measured working point to measure the highest point of the workpiece, the elastic deformation of the elastic baffle plate can sensitively reflect the slight change of the hole to be measured, and therefore the measuring precision of the pneumatic measuring device is greatly improved.

The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or any other related technical fields, are included in the scope of the present invention.