CN110901107A

CN110901107A - Blank transfer device and method based on involution mold

Info

Publication number: CN110901107A
Application number: CN201911162981.9A
Authority: CN
Inventors: 闫恩纬; 吴志鹏; 何煜文; 王展
Original assignee: Xian Aircraft Industry Group Co Ltd
Current assignee: Xian Aircraft Industry Group Co Ltd
Priority date: 2019-11-22
Filing date: 2019-11-22
Publication date: 2020-03-24
Anticipated expiration: 2039-11-22
Also published as: CN110901107B

Abstract

The invention discloses a blank transfer device and a transfer method based on a involution mold, and the device consists of an upper forming mold, a lower forming mold and 2 layers of vacuum bag films. The device has simple structure, and can realize the quick, accurate and reliable transfer of the blank between the involutive molds through the conversion of the actual action of the 2-layer vacuum bag film. The problems of folding, ply slippage and the like of the blank in the transfer process are avoided, and the product quality is improved.

Description

Blank transfer device and method based on involution mold

Technical Field

The invention relates to the field of composite material part manufacturing, in particular to a blank transfer device and a transfer method based on a involution mold.

Background

The composite material has the advantages of high bearing efficiency, strong designability and the like, and is widely applied to the fields of aviation, aerospace, sports goods and the like.

The composite material part is generally paved and pasted by using a forming die, a vacuum bag is manufactured, and the composite material part is cured and formed. For most parts, the paving mould and the forming mould can be fused into a set. However, for parts with complicated changes in part curvature or sharp bends in the shape, the parts need to be manufactured by using matched molds. Namely, the prepreg is paved in a mould structure mode which is beneficial to paving. And after the paving and pasting are finished, transferring the blank to a mold which is favorable for curing to cure so as to ensure the internal and surface quality of the part. The general technique is that after the paving and pasting are finished, the blank which is vacuumized and compacted is manually stripped from a paving and pasting mould, transferred to a curing mould, positioned and compacted, and then cured. By the method, problems of ply folding, ply position slippage and the like of the blank can be caused in the process of stripping the blank from the laying die. Particularly, when the size of the part is large, problems are easy to occur in the processes of peeling and manual transfer of the blank, and the product quality is affected. Moreover, even after long-time vacuum pumping and compaction, the blank is still relatively soft, which is not beneficial to setting a positioning device and influences the positioning accuracy of the transferred blank.

Therefore, a blank transfer device and a transfer method based on a combined mold are needed, so that the blank, especially a large-size blank, can be peeled and transferred, and the problems of prepreg folding, ply slippage and the like in the process are avoided, so that the product quality is influenced.

Disclosure of Invention

The invention discloses a blank transfer device and a transfer method based on a involution mold, which can realize the quick, accurate and reliable transfer of blanks. The problems of ply folding, layering, slippage and the like in the process are avoided, and the product quality is ensured.

The utility model provides a stock transfer device based on closing mould, includes forming die, lower forming die, 2 layers of vacuum bag membrane, goes up forming die and lower forming die and respectively is provided with the round recess along part periphery, and the distance between recess and the part stock of lower forming die is greater than the distance between recess and the stock of last forming die, and 2 layers of vacuum bag membrane are located the surface of upper and lower forming die and the surface of stock respectively. The coverage area of the vacuum bag film on the outer surface of the blank is larger than that of the vacuum bag film on the surface of the forming mold. The vacuum bag film on the surface of the forming die is pleated along the periphery of the inner side of the groove of the upper forming die and the lower forming die.

A blank transfer method based on a involution mold comprises the following steps:

1, placing a sealing rubber strip in a groove of a lower forming die, laying a vacuum bag film, manufacturing a vacuum bag, pleating the vacuum bag film around the inner side of the groove of the lower forming die, and vacuumizing and compacting;

2, paving and pasting the prepreg layer by taking the lower forming die as a paving and pasting die;

3, laying a vacuum bag film on the surface of the part blank to manufacture a vacuum bag, and ensuring that the coverage area of the vacuum bag film on the surface of the blank is larger than that of the vacuum bag film on the surface of the lower forming die;

4, vacuumizing and compacting;

5, placing a sealing rubber strip in the groove of the upper forming die;

6, the upper forming die and the lower forming die are closed;

7 cutting the vacuum bag film on the outer surface of the blank along the edge area of the vacuum bag film on the outer surface of the blank of the lower forming die;

8, pressing the cut vacuum bag film on a sealing rubber strip of the groove of the upper forming die, pleating the periphery of the inner side of the groove of the upper forming die, and cutting off the redundant vacuum bag film;

9, vacuumizing and compacting;

10 cutting the vacuum bag film on the surface of the lower forming die along the groove of the lower forming die;

11, pressing the cut vacuum bag film on an upper forming die by using a sealing rubber strip to ensure that the vacuum bag film coverage area on the blank surface is larger than that of the vacuum bag film on the upper forming die surface;

12, vacuumizing and compacting;

and 13, keeping the vacuumizing compaction state, and separating the upper forming die together with the blank from the lower forming die.

The blank transfer device and the transfer method based on the involution mold have the following advantages that: 1) the structure is simple, the use is convenient, and the blank can be quickly, accurately and reliably transferred; 2) the transfer of the blank between the involution moulds is realized through the conversion of the actual action of the 2-layer vacuum bag film, and the problems of ply folding, layering, slippage and the like which are easy to occur in the manual transfer process are avoided; 3) by positioning the involutory dies, the blank is accurately positioned during transfer, and the positioning precision of the blank is improved.

Drawings

FIG. 1 schematic view of a transfer device

FIG. 2A cross-sectional view of a transfer device

The numbering in the figures illustrates: 1-lower forming die, 2-upper forming die, 3-lower forming die groove, 4-upper forming die groove and 5-blank.

Detailed Description

The invention takes a C-shaped beam as an example, and discloses a blank transfer device based on a folding mold, which comprises an upper forming mold 1, a lower forming

mold

2 and 2 layers of vacuum bag films, wherein a circle of groove is respectively arranged on the upper forming mold 1 and the lower forming mold 2 along the periphery of a part, the distance between a groove 3 of the lower forming mold and the blank of the part is larger than the distance between a groove 4 of the upper forming mold and a blank 5, and the 2 layers of vacuum bag films are respectively positioned on the surfaces of the upper forming mold and the lower forming mold and the outer surface of the blank 5. The covering area of the vacuum bag film on the outer surface of the blank 5 is larger than that of the vacuum bag film on the surfaces of the upper forming die and the lower forming die. The vacuum bag film on the surface of the forming die is pleated along the periphery of the inner side of the groove of the upper forming die and the lower forming die.

1, placing a sealing rubber strip in a groove 3 of a lower forming die, laying a vacuum bag film, manufacturing a vacuum bag, pleating the vacuum bag film around the inner side of the groove of the lower forming die, vacuumizing and compacting;

2, paving and pasting the prepreg layer by taking the lower forming die 1 as a paving and pasting die;

3, laying a vacuum bag film on the surface of the blank 5, manufacturing a vacuum bag, and ensuring that the coverage area of the vacuum bag film on the surface of the blank 5 is larger than that of the vacuum bag film on the surface of the lower forming die 1;

4, vacuumizing and compacting;

5 placing a sealing rubber strip in the groove 4 of the upper forming die;

6, matching the upper forming die 2 with the lower forming die 1;

7 cutting the vacuum bag film on the outer surface of the blank along the edge area of the vacuum bag film on the outer surface of the blank 5 of the lower forming die;

8, pressing the cut vacuum bag film on a sealing rubber strip of the groove 4 of the upper forming die, pleating the periphery of the inner side of the groove of the upper forming die, and cutting off the redundant vacuum bag film;

9, vacuumizing and compacting;

10 cutting a vacuum bag film on the surface of the lower forming die along the groove of the lower forming die 1;

11, pressing the cut vacuum bag film on the upper forming die 2 by using a sealing rubber strip to ensure that the vacuum bag film coverage area on the surface of the blank 5 is larger than that of the vacuum bag film on the surface of the upper forming die 2;

12, vacuumizing and compacting;

13 keeping the vacuum compaction state, separating the upper forming die 2 together with the blank 5 from the lower forming die 1.

Claims

1. The utility model provides a stock transfer device based on closing mould, includes forming die, lower forming die, 2 layers of vacuum bag membrane, its characterized in that goes up forming die and lower forming die and respectively is provided with the round recess along part periphery, and the distance between recess and the part stock of lower forming die is greater than the distance between recess and the stock of last forming die, and 2 layers of vacuum bag membrane are located the surface of upper and lower forming die and the surface of stock respectively.

2. A blank transferring apparatus based on matched molds according to claim 1, wherein the covering area of the vacuum bag film on the outer surface of the blank is larger than that of the vacuum bag film on the surface of the forming mold.

3. A matched mold based blank transfer device according to claim 1, wherein the vacuum bag film on the surface of the forming mold is pleated along the inner periphery of the concave groove of the upper and lower forming molds.

4. A blank transfer method based on a involution mold is characterized by comprising the following steps:

4-1, placing a sealing rubber strip in the groove of the lower forming die, laying a vacuum bag film, manufacturing a vacuum bag, pleating the vacuum bag film around the inner side of the groove of the lower forming die, vacuumizing and compacting;

4-2, taking the lower forming die as a paving die, and paving the prepreg layer by layer;

4-3, laying a vacuum bag film on the surface of the part blank, manufacturing a vacuum bag, and ensuring that the coverage area of the vacuum bag film on the surface of the blank is larger than that of the vacuum bag film on the surface of the lower forming die;

4-4, vacuumizing and compacting;

4-5, placing a sealing rubber strip in the groove of the upper forming die;

4-6, matching the upper forming die with the lower forming die;

4-7 cutting the vacuum bag film on the outer surface of the blank along the edge area of the vacuum bag film on the outer surface of the blank of the lower forming die;

4-8, pressing the cut vacuum bag film on a sealing rubber strip of the groove of the upper forming die, pleating the periphery of the inner side of the groove of the upper forming die, and cutting off the redundant vacuum bag film;

4-9, vacuumizing and compacting;

4-10 cutting the vacuum bag film on the surface of the lower forming die along the groove of the lower forming die;

4-11, pressing the cut vacuum bag film on an upper forming die by using a sealing rubber strip to ensure that the vacuum bag film coverage area on the blank surface is larger than that on the upper forming die surface;

4-12, vacuumizing and compacting;

4-13 keeping the vacuumizing compaction state, and separating the upper forming die together with the blank from the lower forming die.