CN212390957U

CN212390957U - Detection device for convex-concave quantity of surface fastener of airplane structure

Info

Publication number: CN212390957U
Application number: CN202020820595.6U
Authority: CN
Inventors: 张辉; 潘新; 白继鹏
Original assignee: Shenyang Aircraft Industry Group Co Ltd
Current assignee: Shenyang Aircraft Industry Group Co Ltd
Priority date: 2020-05-15
Filing date: 2020-05-15
Publication date: 2021-01-22
Anticipated expiration: 2030-05-15

Abstract

The utility model discloses an aircraft structure surface fastener convex-concave volume detection device, it mainly comprises fixed sleeve and differential sleeve. The three-jaw contact pin is used for contacting the surface of the aircraft skin as a measuring reference, the probe of the measuring screw is used for contacting the surface to be measured, namely the upper surface of the fastener head, and the measurement result of the convex-concave amount is read based on the principle of screw micrometering. The device has the characteristics of high measurement precision, flexibility, portability, simple operation, strong universality and the like.

Description

Detection device for convex-concave quantity of surface fastener of airplane structure

Technical Field

The utility model belongs to the technical field of the aeronautical manufacturing engineering/aircraft assembly, concretely relates to aircraft structure surface fastener convex-concave volume detection device for whether the flush degree of evaluation aircraft structure surface rivet or screw accords with the designing requirement.

Background

Aircraft assembly is a complex process with high technical requirements, and thousands of fasteners, including rivets and screws, need to be accurately installed. The quality of the fastener installation will inevitably affect the structural strength, fatigue and stealth properties of the aircraft. The flatness of the fastener, namely the amount of surface unevenness after installation, is one of the important factors determining the surface quality and stealth performance of the airplane, and ensuring the installation consistency and flatness of the fastener is also a difficulty in the manufacturing process of the airplane. It is significant to detect the amount of surface irregularities after fastener installation and to perform subsequent process optimization and quality improvement. However, at present, the plane assembly workshop still uses tools such as a traditional steel plate ruler, a feeler gauge and the like to detect the levelness of the fastener on the surface of the structure by visual and manual touch methods. The method has high dependence on operators and low efficiency, and meanwhile, the reliability of the measured data is difficult to guarantee. At present, the method can be used as a means for checking whether the convex-concave quantity of the surface of the rivet or the screw head meets the requirement. However, with the continuous improvement of various index performances of a new generation of warplanes, more severe requirements are provided for the manufacture of airplanes, and the traditional fastener flatness detection mode cannot meet the requirements of model development.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an aircraft structure surface fastener convex-concave volume detection device towards aircraft assembly. By using the device, after the assembly of the aircraft assembly or the component is completed, the convex-concave amount of the rivet and the screw head on the surface of the aircraft skin relative to the surface of the aircraft skin can be measured, whether the surface flatness meets the manufacturing requirement or not is quantitatively evaluated, and a stable and reliable evaluation means is provided for the evaluation of the surface quality of the aircraft. Compared with the traditional detection mode, the detection precision of the levelness of the surface fastener of the airplane is greatly improved, detailed traceable data are provided for the subsequent optimization of manual riveting or screwing technology, and a guarantee is provided for the application of advanced automatic connecting equipment.

The technical scheme of the utility model is that:

a convex-concave amount detection device for an aircraft structure surface fastener comprises a fixed sleeve component 1, a differential sleeve component 2, a flat-head interchangeable probe 10, a pointed interchangeable probe 11 and a calibration gauge block 9; the fixed sleeve assembly 1 comprises a three-jaw contact pin 3 and a sleeve 4 with scales, the three-jaw contact pin 3 is located at one end of the sleeve 4 with the scales, and the three-jaw contact pin 3 is used for contacting an aircraft skin during measurement.

The differential sleeve component 2 comprises a measuring screw rod 5, a movable scale 6, a knob 7 and a fine adjustment knob 8, wherein the measuring screw rod 5 is positioned at the front end of the differential sleeve component 2 and is used for being connected with a flat head interchangeable probe 10 or a pointed head interchangeable probe 11, and the flat head interchangeable probe 10 or the pointed head interchangeable probe 11 contacts a fastener during measurement; the other end of the measuring screw 5 is connected with a movable scale 6, a knob 7 is arranged at the outer rear end of the movable scale 6, a fine adjustment knob 8 is arranged on the rear end face of the movable scale 6, and the knob 7 and the fine adjustment knob 8 are used for adjusting a flat-head replaceable probe 10 or a sharp-head replaceable probe 11 at the front end of the measuring screw 5 to be in contact with a measuring surface; the measuring screw 5 is connected with the graduated sleeve 4 through a precise thread, so that the differential sleeve component 2 is connected with the fixed sleeve component 1.

The utility model discloses an effect and benefit are:

1. when the device is used for measuring the levelness of the fastener on the surface of the aircraft skin, the three-jaw contact pin of the device is in contact with the aircraft skin to serve as a measuring reference surface, the screw probe is in surface contact with a rivet or a screw head to be measured, then the reading is carried out to realize the detection of the levelness of the fastener, and the whole measuring process is convenient and fast.

2. The tail part of a screw probe of the device is connected with a differential sleeve, the differential sleeve is sleeved on a fixed sleeve through a precise thread, movable scales are arranged on the conical surface of the differential sleeve, the fixed sleeve is provided with fixed scales, the measurement precision can reach 0.01mm by reading the scales on the sleeve, and the principle is similar to that of a screw micrometer. The method realizes the accurate digital detection of the levelness of the skin surface fastener in the aircraft manufacturing process, and greatly improves and perfects the quality assurance system for aircraft manufacturing.

3. The device adopts the quick replaceable probe, and designs the probe with two structural forms of the pointed end and the flat end, the flat end probe can measure the maximum convex-concave quantity value, the pointed end probe can measure the minimum value, and the requirement of measuring the levelness is met by replacing different measuring probes.

4. The device is designed integrally, flexible and portable. And the convex-concave quantity of the fastener is measured by using the cooperation of a steel plate ruler and a clearance gauge in the traditional mode, so that the device is applied, the labor is greatly saved, the operation is convenient, and the efficiency is high.

In conclusion, the fastener convex-concave amount detection device realizes the quick and accurate measurement of the flatness of the fastener on the surface of the aircraft skin by utilizing the fixing sleeve and the differential sleeve.

Drawings

Fig. 1 is a schematic structural diagram of an aircraft structure surface fastener convexo-concave amount detection device provided in an embodiment of the present invention.

Fig. 2 is a schematic structural view of a fixing sleeve assembly of the device for detecting the amount of protrusion and depression of the surface fastener of the aircraft structure provided in the embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a differential sleeve assembly of an aircraft structure surface fastener convexo-concave amount detection device provided in an embodiment of the present invention.

Fig. 4 is a schematic view of a calibration gauge block of an aircraft structure surface fastener convexo-concave amount detection apparatus provided in an embodiment of the present invention.

Fig. 5A and 5B are schematic diagrams of a quick-replaceable probe of an aircraft structure surface fastener convex-concave amount detection device provided in an embodiment of the present invention.

In the figure: 1 fixing a sleeve assembly; 2 a differential sleeve assembly; 3, three-jaw contact pins; 4, a sleeve with scales; 5, measuring a screw rod; 6, movable scales; 7, a knob; 8, finely adjusting a knob; 9 calibrating the gauge block; 10 flat head replaceable probe; 11 tip interchangeable probes.

Detailed Description

The following further describes a specific embodiment of the present invention with reference to the drawings and technical solutions.

It is to be understood that the appended drawings are not to scale, but are merely drawn with appropriate simplifications to illustrate various features of the basic principles of the invention. Specific design features of the invention disclosed herein, including, for example, specific dimensions, orientations, locations, and configurations, will be determined in part by the particular intended application and environment of use.

In the several figures of the drawings, identical or equivalent components (elements) are referenced with the same reference numerals.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

The utility model discloses a to the accurate detection device of the protruding and concave volume of fastener of aircraft skin surface quality, through utilizing three-jaw feeler and the differential sleeve on the fixed sleeve on the probe of measuring screw respectively with aircraft skin surface and fastener head surface contact, read scale interval on the sleeve, realized the quick accurate measurement of aircraft skin surface fastener flush degree.

Fig. 1 is a schematic structural diagram of an aircraft structure surface fastener convexo-concave amount detection device provided in an embodiment of the present invention. Fig. 2 is a schematic view of the structure of the fixing sleeve assembly. Fig. 3 is a schematic view of the differential sleeve assembly construction. Fig. 4 is a schematic diagram of the calibration gauge block. Fig. 5A and 5B are schematic views of a quick-change probe thereof. Referring to fig. 1 to 5B, in the present embodiment, the aircraft structure surface fastener convexo-concave amount detecting device includes a fixed sleeve assembly 1, a differential sleeve assembly 2, a flat head interchangeable probe 10, a flat head interchangeable probe 11 and a calibration gauge block 9. The fixed sleeve assembly 1 comprises a three-jaw contact pin 3 and a sleeve 4 with scales, the three-jaw contact pin 3 is located at one end of the sleeve 4 with the scales, and the three-jaw contact pin 3 is used for contacting an aircraft skin during measurement.

The differential sleeve assembly 2 comprises a measuring screw 5, a movable scale 6, a knob 7 and a fine adjustment knob 8, wherein the measuring screw 5 is positioned at the front end of the differential sleeve assembly 2 and is used for being connected with a flat head interchangeable probe 10 or a pointed head interchangeable probe 11, and the flat head interchangeable probe 10 or the pointed head interchangeable probe 11 contacts a fastener (namely a rivet or a screw head) during measurement. The other end of the measuring screw rod 5 is connected with a movable scale 6, the outer rear end of the movable scale 6 is provided with a knob 7, and the rear end face of the movable scale 6 is provided with a fine adjustment knob 8; the measuring screw 5 is connected with the graduated sleeve 4 through a precise thread, so that the differential sleeve component 2 is connected with the fixed sleeve component 1. The knob 7 and the fine adjustment knob 8 are used to adjust a flat tip interchangeable probe 10 or a sharp tip interchangeable probe 11 at the front end of the measuring screw 5 to contact the measuring surface.

Specifically, when in use, as shown in fig. 1, 2 and 3, the fixed sleeve assembly 1 is composed of a three-jaw contact pin 3 and a sleeve 4 with scales, a knob 7, a fine adjustment knob 8, a movable scale 6, a measurement screw 5 and a flat-head replaceable probe 10 or a sharp-head replaceable probe 11 at the front end are connected together, the measurement screw 5 is connected with the sleeve 4 with scales through a precise thread, and the differential sleeve assembly 2 is sleeved on the fixed sleeve assembly 1 through the thread connection to form the integral measuring device. Before measurement is started, zero calibration needs to be carried out on the detection device, the three-jaw contact pin 3 and a probe (a flat-head replaceable probe 10 or a sharp-head replaceable probe 11) at the front end of the measurement screw 5 are simultaneously and stably contacted with the horizontal surface of the calibration measuring block 9, and then subsequent measurement can be carried out only when the readings on the scale sleeve 4 and the movable scale 6 are 0. In the measuring process, firstly, the three-jaw contact pin 3 needs to be adjusted to stably contact the surface of the aircraft skin to be used as a measuring reference, so that the fixed sleeve assembly 1 is always fixed and stable in the measuring process; the probe (flat head interchangeable probe 10 or tip interchangeable probe 11) at the front end of the measuring screw 5 is then brought into adjusted contact with the measuring surface, i.e. the surface of the fastener head, by means of the knob 7 and the fine adjustment knob 8; the thread pitch of the thread on the measuring screw rod 5 is 0.5mm, 50 equal division scales are arranged on the conical surface of the movable scale 6, the movable scale 6 rotates for a circle, the measuring screw rod 5 can advance or retreat for 0.5mm, therefore, each small division is rotated, which is equivalent to the forward or retreat of the measuring screw rod 5 for 0.01mm (0.5mm/50), based on the spiral micrometering principle, when the probe of the measuring screw rod 5 is stably contacted with the surface of a plane to be measured, namely a rivet or a screw head, the final measuring result can be obtained by reading the readings on the sleeve 4 with the scales and the movable scale 6, and further the quick and accurate measurement of the levelness of the aircraft skin surface fastener is realized.

The above description of exemplary embodiments has been presented only to illustrate the technical solutions of the present invention, and is not intended to be exhaustive or to limit the present invention to the precise forms described. Obviously, many modifications and variations are possible in light of the above teaching to those skilled in the art. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to thereby enable others skilled in the art to understand, implement and utilize the invention in various exemplary embodiments and with various alternatives and modifications. It is intended that the scope of the invention be defined by the following claims and their equivalents.

Claims

1. The convex-concave amount detection device for the surface fastener of the aircraft structure is characterized by comprising a fixed sleeve assembly (1), a differential sleeve assembly (2), a flat-head replaceable probe (10), a flat-head replaceable probe (11) and a calibration gauge block (9); wherein the content of the first and second substances,

the fixed sleeve assembly (1) comprises a three-jaw contact pin (3) and a sleeve (4) with scales, the three-jaw contact pin (3) is located at one end of the sleeve (4) with the scales, and the three-jaw contact pin (3) is used for contacting an aircraft skin during measurement;

the differential sleeve assembly (2) comprises a measuring screw rod (5), a movable scale (6), a knob (7) and a fine adjustment knob (8), the measuring screw rod (5) is located at the front end of the differential sleeve assembly (2) and used for being connected with a flat head interchangeable probe (10) or a pointed head interchangeable probe (11), and the flat head interchangeable probe (10) or the pointed head interchangeable probe (11) contacts with a fastener during measurement;

the other end of the measuring screw rod (5) is connected with the movable scale (6), the knob (7) is arranged at the rear end outside the movable scale (6), the fine adjustment knob (8) is arranged on the end face of the rear end of the movable scale (6), and the knob (7) and the fine adjustment knob (8) are used for adjusting a flat head replaceable probe (10) or a pointed head replaceable probe (11) at the front end of the measuring screw rod (5) to contact with the measuring surface; the measuring screw rod (5) is connected with the sleeve (4) with scales through a precise thread, and then the differential sleeve component (2) is connected with the fixed sleeve component (1).