CN214418224U

CN214418224U - Rib and milling frock

Info

Publication number: CN214418224U
Application number: CN202120035657.7U
Authority: CN
Inventors: 王玉凯; 张达; 涂尚平; 贾朋军; 郭红军
Original assignee: Changzhou Qifu Antai Composite Technology Co ltd
Current assignee: Changzhou Qifu Antai Composite Technology Co ltd
Priority date: 2021-01-07
Filing date: 2021-01-07
Publication date: 2021-10-19
Anticipated expiration: 2031-01-07

Abstract

The utility model belongs to the technical field of wings, in particular to a wing rib, the material of which is made of carbon fiber composite material, the wing rib comprises a rib body, the local part of the rib body is sunken towards the inner side of the rib body to form a crushing rib, the cross section of the crushing rib is arc-shaped, and the crushing rib faces to the stress direction of the rib body and extends to the two sides of the rib body; lightening holes penetrate through the rib body, and the edges of the lightening holes are sunken towards the inner side of the rib body to form flanging; and a layer of glass fiber prepreg is paved on the surface layer of the local outer side of the rib body. Has the advantages that: the wing rib of the utility model adopts carbon fiber composite material, a layer of glass fiber prepreg is laid at the joint of the local outer surface layer and the metal to avoid corrosion, the edge of the lightening hole is provided with a flanging, and the lightening of the wing rib can be realized to the greatest extent while the rigidity and the strength are ensured; the crushing ribs greatly improve the bending rigidity of the wing rib and improve the buckling resistance of the wing rib.

Description

Rib and milling frock

Technical Field

The utility model belongs to the technical field of the wing, especially, relate to a wing rib and mill frock.

Background

With the development of times, carbon fiber composite materials play an increasingly important role in the aerospace field due to a series of excellent characteristics of high strength, high modulus, designability, corrosion resistance, fatigue resistance and easiness in integral forming.

In addition to maintaining the desired shape of the airfoil profile, the rib functions to provide vertical support to the skin, stringers, and stringers with stiffness in its own plane when the airfoil is aerodynamically loaded. And meanwhile, the wing rib is supported on the skins and the webs of the beams (or walls) along the periphery, and when the wing rib is loaded, the skins and the webs provide supporting shear flow in each plane for the wing rib, so that the wing rib plays a vital role on an airplane and has a quite high requirement on dimensional precision.

Traditional wing rib is metal construction, and the quality is great, and traditional processing frock is direct centre gripping wing rib in addition, and because of carbon-fibre composite's wing rib thickness is little, the required precision is high, and CNC milling machine milling is with the man-hour easily resulting in the finished piece to warp, consequently need to design a wing rib milling frock urgently.

SUMMERY OF THE UTILITY MODEL

For the yielding problem of rib processing that solves prior art existence, the utility model provides a rib and mill and cut frock.

In order to solve the technical problem, the technical solution adopted by the present invention is that a rib is made of carbon fiber composite material, and includes a rib body, wherein a local portion of the rib body is recessed towards an inner side of the rib body to form a crush rib, a cross section of the crush rib is arc-shaped, and the crush rib faces a force direction of the rib body and extends to two sides of the rib body; lightening holes penetrate through the rib body, and the edges of the lightening holes are sunken towards the inner side of the rib body to form flanging; and a layer of glass fiber prepreg is paved on the surface layer of the local outer side of the rib body.

Preferably, the three adjacent edges of the rib body are bent towards the inner side of the rib body to form bent parts, and a plurality of rat holes are formed in the bent parts in the middle. When the wing rib is assembled with the wing, the rat hole is used for the stringer to pass through, so that the wing rib and the stringer are ensured not to generate interference, and meanwhile, the reliability and the stability of the wing rib are improved.

Preferably, the rib body is further provided with a fabrication hole and a circuit passing hole. When the wing rib is assembled with the wing, the wing rib is fixed by rivet pulling through the fabrication hole, so that the precise positioning of the wing rib during assembly can be ensured; the line passes through the hole and is used for the passing through of various circuits on the organism, and this rib's structural design is reasonable reliable.

A wing rib milling tool is used for processing the wing rib, the three adjacent sides of the rib body are bent towards the inner side of the rib body to form a bent part, the wing rib milling tool comprises a bottom plate, a support and a milling inner mold which are sequentially arranged from bottom to top, a sealing groove, an air guide groove, a groove and a first milling cutter groove are formed in the top end of the milling inner mold, the inner side of the rib body is attached to the top end of the milling inner mold, the bent part is attached to the side face of the milling inner mold, the groove is matched with a crushing rib, the first milling cutter groove is matched with a lightening hole, the sealing groove is formed around the periphery of the rib body, the air guide groove, the groove and the first milling cutter groove are all located in the sealing groove, a sealing ring is arranged between the sealing groove and the rib body, an air suction hole communicated with the air guide groove is formed in the milling inner mold, a second milling cutter groove is formed in the milling inner mold, the second milling cutter groove is positioned around the wing rib.

Preferably, the air guide groove divides the top end of the milling inner die into a plurality of areas. The sealing performance between the milling inner die and the wing ribs during vacuumizing is further guaranteed, the wing ribs are tightly attached to the milling inner die, and the wing ribs cannot deform during milling.

Preferably, the top end of the milling inner die is provided with three milling cutter positioning grooves. The milling cutter is accurately positioned during milling.

Preferably, the bracket is formed by welding stainless steel sections, the bottom plate is made of stainless steel materials, and the bracket and the bottom plate are fixedly connected through welding; the material of the milling internal mold is aluminum alloy or wood substitute material; the support is fixedly connected with the milling inner die through the corner piece and the first bolt. The bottom plate, the bracket and the milling internal mold are convenient to process and manufacture, the connection is reliable, and the cost is lower; the support supports the milling internal mold, so that the milling cutter is effectively prevented from damaging the bottom plate during milling; the milling internal mold is detachably connected with the support, so that the milling internal mold is convenient to replace, and the support and the bottom plate are recycled.

Preferably, the base plate is positioned on a milling platform of a milling machine through a positioning pin, and the base plate is fixedly connected with the milling platform through a second bolt. The positioning pin ensures the correct position of the bottom plate and the milling platform.

Furthermore, a plurality of rat holes are formed in the middle of the bending part, and a third milling cutter groove matched with the rat holes is formed in the side face of the milling inner die. The milling cutter can not touch the milling inner die when the rat hole is milled, and the milling cutter and the milling inner die are prevented from being damaged.

Furthermore, the rib body is further provided with a process hole and a line passing hole, and the top end of the milling inner die is further provided with a fourth milling cutter groove matched with the process hole and a fifth milling cutter groove matched with the line passing hole. The milling cutter can not touch the milling inner die when the milling process hole and the line pass through the hole, and the milling cutter and the milling inner die are prevented from being damaged.

Has the advantages that:

the wing rib of the utility model adopts carbon fiber composite material, the local outer side and the metal connection part are used for avoiding corrosion, a layer of glass fiber prepreg is laid on the surface layer, the wing rib is provided with lightening holes, the edge of the lightening holes is provided with a flanging, so that the periphery of the lightening holes is strengthened, the stress state around the holes is improved, the bearing capacity of the wing rib is ensured, and the weight reduction of the wing rib can be realized to the maximum extent while the rigidity strength is ensured; the crushing ribs face the stress direction of the rib body and extend to the two sides of the rib body, so that the bending rigidity of the wing rib is greatly improved, and the buckling resistance of the wing rib is improved;

the utility model discloses a wing rib milling frock, place the blank piece of treating processing wing rib on milling centre form, simultaneously through aspirating hole and air guide groove evacuation in the seal groove, because the recess to the rib body inboard of bending portion, crushing muscle and lightening hole department has been formed on the blank piece of treating processing wing rib in advance, at this moment, the inboard of rib body and the top of milling centre form closely laminate, crushing muscle is located the recess, bending portion and the side of milling centre form closely laminate, the lightening hole of treating milling is located first milling groove, the edge of the blank piece of treating milling is located the second milling groove, the mouse hole of treating milling is located the third milling groove, the fabrication hole of treating milling is located the fourth milling groove, and the line of treating milling is passed through the hole and is located the fifth milling groove, milling cutter does not mill the edge of blank piece again, the lightening hole, mouse hole fabrication hole and line pass through the hole, accomplish the cutting processing of this wing rib, because the sealing groove is vacuumized through the air exhaust hole and the air guide groove, the top end of the milling inner die is divided into a plurality of areas by the air guide groove, the inner side of the rib body is tightly attached to the top end of the milling inner die, the wing rib cannot deform during milling, and the milling precision of the wing rib is guaranteed.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic perspective view of a rib of the present invention;

fig. 2 is a schematic perspective view of another angle of the rib of the present invention;

fig. 3 is a schematic perspective view of the rib milling tool of the present invention;

fig. 4 is a schematic perspective view of the milling inner mold of the rib milling tool of the present invention;

fig. 5 is a schematic partial sectional view of the milling inner die of the rib milling tool of the present invention;

fig. 6 is a schematic perspective view of the bottom plate and the bracket of the rib milling tool of the present invention;

fig. 7 is a schematic perspective view of the rib milling tool according to the present invention during rib clamping;

in the figure: 1. the rib comprises a rib body, 1-1 parts of crushing ribs, 1-2 parts of lightening holes, 1-3 parts of flanging, 1-4 parts of bending parts, 1-5 parts of rat holes, 1-6 parts of process holes, 1-7 parts of line passing holes, 2 parts of a bottom plate, 3 parts of a support, 4 parts of a milling internal mold, 4-1 parts of a sealing groove, 4-2 parts of an air guide groove, 4-3 parts of a groove, 4-4 parts of a first milling cutter groove, 4-5 parts of an air suction hole, 4-6 parts of a second milling cutter groove, 4-7 parts of a milling cutter positioning groove, 4-8 parts of a third milling cutter groove, 4-9 parts of a fourth milling cutter groove, 4-10 parts of a fifth milling cutter groove, 5 parts of corner pieces, 6 parts of first bolts, 7 parts of positioning pins.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Example 1

As shown in fig. 1 and 2, a rib is made of a carbon fiber composite material, and includes a rib body 1, a part of the rib body 1 is recessed towards the inner side of the rib body 1 to form a crush rib 1-1, a cross section of the crush rib 1-1 is arc-shaped, and the crush rib 1-1 faces a force-bearing direction of the rib body 1 and extends to two sides of the rib body 1; lightening holes 1-2 penetrate through the rib body 1, and the edges of the lightening holes 1-2 are sunken towards the inner side of the rib body 1 to form flanges 1-3; a layer of glass fiber prepreg is laid on the local outer side surface layer of the rib body 1, specifically, a layer of glass fiber prepreg is laid at the joint of the local outer side surface layer of the wing rib and the metal, the potential difference of the laid layer of glass fiber prepreg is effectively reduced, and corrosion is avoided. In order to ensure that the wing rib does not interfere with the stringer of the wing during assembly, three adjacent edges of the rib body 1 are bent towards the inner side of the rib body 1 to form bent parts 1-4, a plurality of mouse holes 1-5 are formed in the bent parts 1-4 positioned in the middle, and the mouse holes 1-5 are used for the stringer to pass through.

In order to ensure that the structural design of the wing rib is more reasonable and reliable, the rib body 1 is also provided with process holes 1-6 and line through holes 1-7, and when the wing rib is assembled with the wing, the wing rib is fixed by rivet pulling through the process holes 1-6, so that the accurate positioning of the wing rib can be ensured during assembly; the wiring passage holes 1-7 are used for passage of various wirings on the body.

As shown in fig. 3 to 7, a rib milling tool is used for processing the rib, and comprises a bottom plate 2, a support 3 and a milling inner mold 4 which are sequentially arranged from bottom to top, wherein the top end of the milling inner mold 4 is provided with a sealing groove 4-1, an air guide groove 4-2, a groove 4-3, a first milling groove 4-4, a fourth milling groove 4-9 and a fifth milling groove 4-10, the inner side of a rib body 1 is attached to the top end of the milling inner mold 4, the groove 4-3 is matched with a crushing rib 1-1, a bending part 1-4 is attached to the side surface of the milling inner mold 4, the side surface of the milling inner mold 4 is provided with a third milling groove 4-8 matched with a mouse hole 1-5, the first milling groove 4-4 is matched with a lightening hole 1-2, the fourth milling cutter groove 4-9 is matched with the process hole 1-6, the fifth milling cutter groove 4-10 is matched with the line through hole 1-7, the sealing groove 4-1 is formed around the rib body 1, the air guide groove 4-2, the groove 4-3, the first milling cutter groove 4-4, the fourth milling cutter groove 4-9 and the fifth milling cutter groove 4-10 are all positioned in the sealing groove 4-1, a sealing ring (not shown in the figure) is arranged between the sealing groove 4-1 and the rib body 1, the milling inner die 4 is provided with an air suction hole 4-5 communicated with the air guide groove 4-2, the milling inner die 4 is provided with the second milling cutter groove 4-6, the second milling cutter groove 4-6 is positioned around the rib, and the first milling cutter groove 4-4 and the second milling cutter groove 4-6 are positioned around the rib, The third milling cutter groove 4-8, the fourth milling cutter groove 4-9 and the fifth milling cutter groove 4-10 are arranged, so that the milling cutter can not touch the milling inner die 4 during milling, and the milling cutter and the milling inner die 4 are prevented from being damaged.

In this embodiment, in order to further ensure the sealing property between the milling inner mold 4 and the rib during the vacuum pumping, and ensure that the rib is tightly attached to the milling inner mold 4, the rib does not deform during the milling, as shown in fig. 3 and 4, the top end of the milling inner mold 4 is divided into a plurality of regions by the air guide grooves 4-2; in order to ensure the accurate positioning of the milling cutter during milling, the top end of the milling inner die 4 is provided with three milling cutter positioning grooves 4-7.

In order to facilitate the processing and manufacturing of the bottom plate 2, the support 3 and the milling inner die 4, ensure reliable connection and reduce cost, as shown in fig. 3 and 6, the support 3 is formed by welding stainless steel sections, the material of the bottom plate 2 is also stainless steel, the support 3 and the bottom plate 2 are fixedly connected by welding, the support 3 supports the milling inner die 4, and a milling cutter is effectively prevented from damaging the bottom plate 2 during milling; the material of the milling internal mold 4 is aluminum alloy or wood substitute material, so that the milling internal mold is convenient to process and low in cost; the support 3 is fixedly connected with the milling inner die 4 through the angle piece 5 and the first bolt 6, the milling inner die 4 is detachably connected with the support 3, the milling inner die 4 is convenient to replace, and the support 3 and the bottom plate 2 are recycled; the base plate 2 is positioned on a milling platform of a milling machine through a positioning pin 7, the positioning pin 7 ensures the correct positions of the base plate 2 and the milling platform, and the base plate 2 is fixedly connected with the milling platform through a second bolt (not shown in the figure).

The working principle is as follows:

firstly, a base plate 2 is positioned on a milling platform of a milling machine through a positioning pin 7, the base plate 2 is fixedly connected with the milling platform through a second bolt, a milling cutter performs milling positioning according to a milling cutter positioning groove 4-7, a blank of a wing rib to be processed is placed on a milling inner mold 4, the inside of a sealing groove 4-1 is vacuumized through an air exhaust hole 4-5 and an air guide groove 4-2, because a bending part 1-4, a crushing rib 1-1 and a lightening hole 1-2 are formed on the blank of the wing rib to be processed in advance and sunken towards the inside of a rib body 1, at the moment, the inside of the rib body 1 is tightly attached to the top end of the milling inner mold 4, the crushing rib 1-1 is positioned in a groove 4-3, the bending part 1-4 is tightly attached to the side face of the milling inner mold 4, and the lightening hole 1-2 to be milled is positioned on a first milling cutter groove 4-4, the edge of a blank to be milled is positioned on the second milling cutter groove 4-6, the rat hole 1-5 to be milled is positioned on the third milling cutter groove 4-8, the process hole 1-6 to be milled is positioned on the fourth milling cutter groove 4-9, the line to be milled is positioned on the fifth milling cutter groove 4-10 through the hole 1-7, the milling cutter respectively mills the edge of the blank, the lightening hole 1-2, the rat hole 1-5 process hole 1-6 and the line through hole 1-7, as shown in figure 7, the milling processing of the wing rib is completed, because the inside of the sealing groove 4-1 is vacuumized through the air exhaust hole 4-5 and the air guide groove 4-2, the top end of the milling inner mold 4 is divided into a plurality of areas through the air guide groove 4-2, the inner side of the rib body 1 is ensured to be tightly attached to the top end of the milling inner mold 4, and the wing rib can not deform during the milling, and due to the arrangement of the first milling cutter groove 4-4, the second milling cutter groove 4-6, the third milling cutter groove 4-8, the fourth milling cutter groove 4-9 and the fifth milling cutter groove 4-10, the milling cutter is ensured not to touch the milling inner die 4 during milling, and the milling cutter and the milling inner die 4 are prevented from being damaged.

Above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the design of the present invention, equivalent replacement or change should be covered within the protection scope of the present invention.

Claims

1. A rib, characterized by: the wing rib is made of a carbon fiber composite material and comprises a rib body (1), wherein part of the rib body (1) is sunken towards the inner side of the rib body (1) to form a crushing rib (1-1), the cross section of the crushing rib (1-1) is arc-shaped, and the crushing rib (1-1) faces to the stress direction of the rib body (1) and extends to two sides of the rib body (1); lightening holes (1-2) penetrate through the rib body (1), and the edges of the lightening holes (1-2) are sunken towards the inner side of the rib body (1) to form flanges (1-3); and a layer of glass fiber prepreg is paved on the surface layer of the local outer side of the rib body (1).

2. The rib of claim 1, wherein: the three adjacent edges of the rib body (1) are bent towards the inner side of the rib body (1) to form bent parts (1-4), and a plurality of rat holes (1-5) are formed in the bent parts (1-4) located in the middle.

3. The rib of claim 1 or 2, wherein: the rib body (1) is also provided with process holes (1-6) and line through holes (1-7).

4. The utility model provides a rib mills and cuts frock which characterized in that: the rib milling tool is used for processing the rib of any one of 1-3, the three adjacent sides of the rib body (1) are bent towards the inner side of the rib body (1) to form a bent part (1-4), the rib milling tool comprises a bottom plate (2), a support (3) and a milling inner die (4) which are sequentially arranged from bottom to top, a sealing groove (4-1), an air guide groove (4-2), a groove (4-3) and a first milling cutter groove (4-4) are formed in the top end of the milling inner die (4), the inner side of the rib body (1) is attached to the top end of the milling inner die (4), the bent part (1-4) is attached to the side face of the milling inner die (4), the groove (4-3) is matched with a crushing rib (1-1), and the first milling cutter groove (4-4) is matched with a lightening hole (1-2), the sealing groove (4-1) is formed around the rib body (1), the air guide groove (4-2), the groove (4-3) and the first milling cutter groove (4-4) are all located in the sealing groove (4-1), a sealing ring is arranged between the sealing groove (4-1) and the rib body (1), an air suction hole (4-5) communicated with the air guide groove (4-2) is formed in the milling inner die (4), the second milling cutter groove (4-6) is formed in the milling inner die (4), and the second milling cutter groove (4-6) is located around the wing rib.

5. The rib milling tool of claim 4, wherein: the air guide groove (4-2) divides the top end of the milling inner die (4) into a plurality of areas.

6. The rib milling tool of claim 4, wherein: the top end of the milling inner die (4) is provided with three milling cutter positioning grooves (4-7).

7. The rib milling tool of claim 4, wherein: the support (3) is formed by welding stainless steel sectional materials, the bottom plate (2) is made of stainless steel materials, and the support (3) is fixedly connected with the bottom plate (2) through welding; the material of the milling internal mold (4) is aluminum alloy or wood substitute material; the support (3) is fixedly connected with the milling inner die (4) through the angle piece (5) and the first bolt (6).

8. The rib milling tool of claim 7, wherein: the bottom plate (2) is positioned on a milling platform of a milling machine through a positioning pin (7), and the bottom plate (2) is fixedly connected with the milling platform through a second bolt.

9. The rib milling tool according to any one of claims 4 to 8, characterized in that: a plurality of rat holes (1-5) are formed in the middle of the bending part (1-4), and a third milling cutter groove (4-8) matched with the rat holes (1-5) is formed in the side face of the milling inner die (4).

10. The rib milling tool of claim 9, wherein: the rib body (1) is further provided with process holes (1-6) and line passing holes (1-7), and the top end of the milling inner die (4) is further provided with fourth milling cutter grooves (4-9) matched with the process holes (1-6) and fifth milling cutter grooves (4-10) matched with the line passing holes (1-7).