Hole making device based on peripheral contour positioning of composite material thin-wall part

Abstract

The utility model belongs to the field of aircraft assembly. The utility model discloses a hole making device based on composite material thin-wall part peripheral contour positioning. Comprising a contour positioning assembly, a drill jig drill sleeve, a jacking block and an avoiding hole. The end face of the thin-wall part to be drilled is limited, the outline of the outer side face of the periphery of the thin-wall part is positioned, rapid and accurate positioning of the drilling device is achieved, drilling is conducted from outside to inside through a drill jig on the device, and drilling operation is convenient; the part inner side jacking block can effectively conduct hole forming jacking on the thin-wall part, and the avoiding hole formed in the jacking block can prevent the cutter from being damaged or products or devices from having accidents due to the fact that the outlet side of the cutter directly drills to the jacking block during hole forming.

Description

Technical Field

[0001] The utility model belongs to the field of aircraft assembly. A hole-making device based on the positioning of the peripheral contour of a composite thin-walled part. Background Technique

[0002] At present, a large number of composite material parts are used in the manufacturing processes of military and civilian aircraft. However, the composite material parts have deformations of different sizes. Especially for thin-walled parts, due to the thin wall thickness, the deformation is more difficult to control. Therefore, the assembly and processing of thin-walled parts, such as precise hole-making, become more difficult.

[0003] For some composite material parts used for aircraft cabin decoration, due to the lack of an accurate processing reference, when making mating holes on such parts, the hole positions are prone to exceed the tolerance, which will further lead to the problem of misaligned holes after mating with other parts. The current method is to use the method of scribing and hole-making, or to scribe the hole position lines on the forming die, and make holes according to the hole position lines returned by the die after demolding. Since the thin-walled parts will have different degrees of deformation after demolding, such as the outer expansion or inner contraction of the surface; therefore, the connecting holes made according to the hole position lines are not in the theoretical positions, so the problem of misaligned holes with the mating parts still cannot be avoided. Content of the Utility Model

[0004] Purpose of the Utility Model

[0005] At present, the hole-making method for thin-walled parts is to make holes according to the hole position lines scribed on the inner surface. The hole position lines are affected by the deformation of the parts and there is a deviation from the theoretical hole position parts. Moreover, the hole position lines are located on the inner surface and the operation space is limited, and it is impossible to accurately align the hole position lines during hole-making; if the method of scribing and hole-making is used, the scribing efficiency is low and the accuracy is poor; both of the above two methods may lead to large deviations in the made mating holes.

[0006] Aiming at the above-mentioned disadvantages of the existing methods, the utility model starts from improving the accuracy and efficiency of hole-making, and designs a hole-making device based on the positioning of the peripheral contour of a composite thin-walled part, effectively improving the accuracy and efficiency of hole-making.

[0007] Technical Solution

[0008] The hole-making device based on the positioning of the peripheral contour of a composite thin-walled part described in the utility model mainly includes: 1 - a contour positioning component, 2 - a drill jig drill sleeve, 3 - a holding block, and 4 - an avoidance hole.

[0009] As shown in the figure, serial number 1 is a contour positioning component, which is mainly used to position the contours of thin-walled parts. There are 4 positioning blocks on the contour positioning component, which are arranged symmetrically between each other. The positioning blocks position the middle area of ​​the 4 edges around the thin-walled parts. The profile of the positioning block conforms to the contour of the thin-walled parts, and the top end of the thin-walled parts supports and limits the contour positioning component. Through this positioning component, the device can be accurately positioned on the thin-walled parts. Serial number 2 is a drilling jig and a drill sleeve. The two drilling jigs and drill sleeves are respectively arranged on the positioning blocks on the upper and lower sides of the contour positioning component 1, and are used to make holes on the matching holes on the thin-walled parts. The drill sleeve is set on the outer surface of the thin-walled parts, and at the same time, two upper and lower symmetrical top holding blocks 3 are arranged on the inner side of the thin-walled parts of the contour positioning component 1. The top holding blocks are designed with avoidance holes 4. On the one hand, the top holding blocks can hold the thin-walled parts when making holes, and on the other hand, the design of the avoidance holes can achieve the hole making tool to give way after drilling through the thin-walled parts during the hole making process.

[0010] Furthermore, the contour positioning component 1 is made of metal material.

[0011] Furthermore, a weight-reducing groove is provided on the contour positioning component 1.

[0012] Furthermore, the gaps between the positioning blocks on the upper and lower sides and the supporting blocks are determined by the maximum wall thickness of the thin-walled parts.

[0013] Furthermore, the distance between the positioning blocks on the left and right sides of the contour positioning component 1 is determined by the distance between the left and right outer side surfaces of the thin-walled part.

[0014] Furthermore, the distance between the positioning blocks on the upper and lower sides of the contour positioning assembly 1 is determined by the distance between the upper and lower outer sides of the thin-walled part, ensuring that the contours of the upper and lower sides of the thin-walled part can extend between the positioning blocks and the supporting block 3.

[0015] Furthermore, the positioning block is chamfered.

[0016] Furthermore, the supporting block 3 is chamfered.

[0017] Furthermore, the distance between the hole axis of the drilling jig and the drilling sleeve 2 and the bottom surface of the contour positioning component 1 is equal to the distance between the connecting hole and the end surface of the thin-walled part.

[0018] Technical Effects

[0019] The device described in the present utility model has been successfully applied to the finished parts of the cabin interior of a certain type of civil aircraft. By limiting the end face of the thin-walled parts to be drilled and positioning the outer side contour of the thin-walled parts around, the rapid and accurate positioning of the drilling device is realized. The drilling die on the device is used to drill holes from the outside to the inside, which is convenient for drilling operations. The inner support block of the part can effectively support the thin-walled parts during hole drilling. The relief hole opened on the support block can avoid the drill directly drilling onto the support block on the tool exit side during hole drilling, causing tool damage or accidents to the product and the device. Through the device described in the present utility model, the accuracy and operation efficiency of the hole matching of the thin-walled parts are effectively improved, which effectively meets the high requirements of customers for production efficiency and manufacturing cycle in the mass production state. At the same time, the risk of hole position out-of-tolerance on the thin-walled parts is reduced, the customer satisfaction is improved, and it has good economic and social benefits. Description of the Drawings

[0020] Figure 1 Schematic diagram of the drilling die tooling;

[0021] Figure 2 Composite material thin-walled structure (left);

[0022] Figure 3 Composite material thin-walled structure (right). Detailed implementation manners

[0023] To make the purpose, technical solutions and advantages of the implementation of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings in the embodiments of the present utility model. In the drawings, the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The described embodiments are some but not all of the embodiments of the present utility model. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present utility model and should not be construed as a limitation to the present utility model. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model. The embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

[0024] A hole drilling device based on the positioning of the surrounding contour of a composite material thin-walled part mainly includes: a contour positioning component 1, a drilling die drill sleeve 2, a support block 3, and a relief hole 4, a total of 4 parts.

[0025] As Figure 1As shown, the contour positioning component 1 is used to limit the peripheral side contour of the thin-walled part, so that the surrounding contour can be within the range enveloped by the contour positioning component. There are 4 positioning blocks on the contour positioning component 1. Every two positioning blocks are symmetrically arranged according to the state of the part. The positioning blocks position the middle areas of the 4 peripheral edges of the thin-walled part. The profile of the positioning blocks conforms to the contour of the thin-walled part. The top end face of the thin-walled part supports and limits the contour positioning component. Through this positioning component, the device can be accurately positioned on the thin-walled part.

[0026] The drill jig bush 2 is arranged on the positioning blocks on the upper and lower sides of the contour positioning component 1 respectively, and is used for drilling the mating holes on the thin-walled part. The drill bush is in the structural form of a "T" type drill bush, which can effectively increase the guiding length when the thickness of the positioning block is certain. The drill bush is arranged on the outer surface of the thin-walled part. At the same time, two upper and lower symmetric holding blocks 3 are arranged on the inner side of the contour positioning component 1 where it is located on the thin-walled part, and avoidance holes 4 are designed at the positions of the holding blocks opposite to the group eye drill bush. On the one hand, the holding blocks can hold the thin-walled part during drilling. On the other hand, the avoidance holes can effectively avoid the part of the tool that extends out of the part after drilling through the thin-walled part, avoiding tool damage or other unexpected situations.

[0027] Among them, the contour positioning component 1 is made of metal material, such as aluminum alloy material, and a weight reduction groove is machined in the inner cavity of the contour positioning component 1. On the premise of meeting the use requirements, the device is as simple and light as possible.

[0028] The gap between the upper and lower positioning blocks and the holding blocks on both sides of the device is designed according to the maximum wall thickness dimension of the thin-walled part. The distance between the left and right positioning blocks of the contour positioning component 1 is determined according to the distance between the left and right outer side surfaces of the thin-walled part. The distance between the upper and lower positioning blocks of the contour positioning component 1 is determined according to the distance between the upper and lower outer side surfaces of the thin-walled part, which can effectively ensure that the outer contours on the upper and lower sides of the thin-walled part extend into the space between the positioning blocks and the holding blocks 3, realizing the positioning of the thin-walled part.

[0029] In addition, the edges and corners of the positioning blocks and the holding blocks 3 are chamfered. For drilling, an important point that cannot be ignored is that the distance between the hole axis of the drill jig bush 2 and the bottom surface of the contour positioning component 1 is equal to the distance between the connecting hole and the end face on the thin-walled part. Otherwise, it is impossible to ensure the positioning dimensions such as the hole edge distance dimension after drilling.

[0030] A hole-making method for positioning the peripheral contours of composite material thin-walled parts, and the specific use steps mainly include:

[0031] 1. Use measuring tools such as vernier calipers to check that the drill bushing hole diameter of the positioning component and the appearance of the positioning component meet the requirements, and avoid using out-of-tolerance tooling for product hole making.

[0032] 2. Place the processed thin-walled part on a stable operating table, ensuring that it is firmly placed without shaking.

[0033] 3. According to the requirements of the drawing or the use of the positioning component, install the positioning component on the thin-walled part, making the end face of the thin-walled part fit with the bottom surface of the positioning component 1. At the same time, ensure that the upper and lower contours of the thin-walled part extend into the space between the positioning block and the holding block 3 to achieve positioning.

[0034] 4. Drill holes in the thin-walled part from the outside to the inside according to the drill bushing holes on the positioning component to make connection holes.

[0035] 5. Remove the positioning component from the thin-walled part and clean the burrs at the hole opening and the excess materials from hole making. The protection points of the present utility model: The present utility model effectively solves the problem that the deformation of the composite material thin-walled part after forming and demoulding leads to inaccurate hole making by positioning the four-week contours of the composite material thin-walled part. The drill die is set on the open outside of the product, making hole making more convenient and with higher hole-making efficiency. Using the top surface of the composite material thin-walled part to limit the height of the device effectively ensures the dimensions such as the edge distance between the connection holes drilled on the drill die and the thin-walled part, with higher accuracy.

[0036] The problem to be solved by the present utility model is to design a hole-making device based on the positioning of the four-week contours of a composite material thin-walled part. By positioning the four-week contours of the thin-walled part, the position of the connection hole is determined and holes are made, thereby improving the accuracy of hole making and avoiding the problem of large hole position deviation caused by the deformation of the thin-walled part.

[0037] Those skilled in the art can understand that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as the general understanding of those of ordinary skill in the field to which this utility model belongs. It should also be understood that terms such as those defined in a general dictionary should be understood to have a meaning consistent with their meaning in the context of the prior art, and will not be interpreted with an idealized or overly formal meaning unless defined as such here. The specific embodiments described above have further elaborated on the purpose, technical solutions, and beneficial effects of this utility model. It should be understood that the above is only the specific embodiment of this utility model and is not used to limit this utility model. Any person skilled in the art may, within the spirit and principles of this utility model, use the disclosed technical content to make changes or modifications to equivalent embodiments that are equivalent variations and apply them to other fields. However, as long as they do not depart from the technical solution content of this utility model, any simple modifications, equivalent variations, and modifications made to the above embodiments based on the technical essence of this utility model, any modifications, equivalent replacements, improvements, etc., shall be included within the protection scope of this utility model.

Claims

1. A hole-making device based on positioning the contours of a composite thin-walled part, characterized in that: include: Contour positioning component, drilling jig and drill sleeve, supporting block and avoidance hole; the contour positioning component is used to position the contours of thin-walled parts; 4 positioning blocks are arranged on the contour positioning component, and the two positioning blocks are arranged symmetrically with each other. The positioning blocks position the middle area of ​​the four edges around the thin-walled parts. The profile of the positioning block conforms to the contour outer surface of the thin-walled parts, and the top end surface of the thin-walled parts supports and limits the contour positioning component; the positioning component is used to accurately position the device on the thin-walled parts; two drilling jigs and drill sleeves are respectively arranged on the positioning blocks on the upper and lower sides of the contour positioning component, and are used to make holes on the matching holes on the thin-walled parts; the drill sleeve is arranged on the outer surface of the thin-walled parts, and two upper and lower symmetrical supporting blocks are arranged on the inner side of the thin-walled parts of the contour positioning component, and the supporting blocks are designed with avoidance holes. The supporting blocks support the thin-walled parts when making holes, and the avoidance holes can achieve the giving way of the hole-making tool after it drills through the thin-walled parts during the hole-making process.

2. The hole making device according to claim 1, characterized in that: The contour positioning component is made of metal material.

3. The hole making device according to claim 2, characterized in that: A weight-reducing groove is provided on the contour positioning assembly.

4. The hole-making device according to claim 3, characterized in that: The gaps between the upper and lower positioning blocks and the supporting blocks are determined by the maximum wall thickness of the thin-walled parts.

5. The hole making device according to claim 4, characterized in that: The distance between the positioning blocks on the left and right sides of the contour positioning assembly is determined by the distance between the left and right outer side surfaces of the thin-walled part.

6. The hole-making device according to claim 5, characterized in that: The distance between the positioning blocks on the upper and lower sides of the contour positioning assembly is determined by the distance between the upper and lower outer sides of the thin-walled part, ensuring that the contours of the upper and lower sides of the thin-walled part can extend between the positioning blocks and the supporting blocks.

7. The hole-making device according to claim 6, characterized in that: The positioning block is chamfered.

8. The hole-making device according to claim 7, characterized in that: The supporting block is chamfered.

9. The hole-making device according to claim 8, characterized in that: The distance between the hole axis of the drilling jig and the bottom surface of the contour positioning component is equal to the distance between the connecting hole and the end surface of the thin-walled part.

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