CN115946059A - A method for processing and positioning aircraft sandwich foam composite materials - Google Patents

Abstract

The invention belongs to the technical field of tooling auxiliary equipment, and relates to a method for processing and positioning an aircraft sandwich foam composite material. The steps are as follows: First, paste the double-sided tape on the tooling surface of the part processing; according to the machining allowance of the part, place a micrometer piece equal to the thickness of the machining allowance between the corner positioning block and the contour of the tooling, and place the corner positioning block towards the Tighten the direction of the tooling outline to ensure that the gap between the corner positioning block and the tooling outline is equal to the thickness of the micrometer; remove the micrometers everywhere, and tighten the bolts; bond the foam sandwich composite parts to the surface of the tooling, because There is a limit of the positioning device, which can accurately ensure the positioning accuracy of the processing of foam sandwich composite parts.

Description

A method for processing and positioning aircraft sandwich foam composite materials

technical field

The invention belongs to the technical field of tooling auxiliary equipment, and relates to a method for processing and positioning an aircraft sandwich foam composite material.

Background technique

At present, some domestic enterprises have the ability to process aircraft sandwich foam composite materials. Through the continuous improvement of clamping methods and the use of special tools, the product quality is becoming more and more stable. When the accuracy requirements of aircraft sandwich foam composite parts are low, the traditional manual or foaming process can basically meet the production needs. However, with the gradual expansion of the scope of use of foam sandwich composite parts and the expansion of the scope of application, the disadvantages of low efficiency and poor accuracy of traditional process solutions are becoming more and more obvious.

At present, the traditional clamping and positioning method is the method of using double-sided adhesive bonding and fixing while manually marking the positioning. The method is to first bond the double-sided tape to the surface of the tooling, and then use manual compaction to make the double-sided tape fit the surface of the tooling as much as possible, and then cut off the excess tape around the bonding surface. Finally, draw a line on the outer contour of the tooling according to the processing allowance of the foam sandwich composite material. According to the allowance line, the foam sandwich composite material and tooling are positioned visually, and the foam sandwich composite material is bonded, and then the foam sandwich composite material is completed. Core composite positioning prior to machining.

This type of processing positioning method has the following shortcomings:

1. The clamping process is completed manually by workers, and human errors have a great influence on the positioning accuracy of parts. However, the shape of the tooling is often a complex surface determined according to the parts. Therefore, it is difficult to draw a line on the periphery of the tooling according to the contour of the equal margin, and the accuracy is low. If it is light, it will cause small steps in the front and back of the part, and if it is heavy, it will cause deviation in the reverse processing of the part. shift, resulting in scrapped parts.

2. Manual scribing by workers is labor-intensive and inefficient; it will lengthen the entire part processing cycle, and after each scribing, the traces of scribing will affect the next positioning.

Contents of the invention

The purpose of the present invention is to provide a processing and positioning device for a kind of aircraft sandwich foam composite material, so as to improve the accuracy of parts turning and clamping, improve the overall precision of processed parts, shorten the processing time, reduce production costs, and ensure the aircraft sandwich foam composite. The purpose of high precision positioning during material processing.

The present invention adopts following technical scheme in order to realize the above object:

A method for processing and positioning an aircraft sandwich foam composite material, the steps of which are as follows:

S1. First paste the double-sided tape on the surface of the tooling for parts processing;

S2. Install a positioning device on the contour of the tooling. The device includes a bolt and an angle positioning block. The bolt is used to fix the position of the angle positioning block, and the angle positioning block is used to control the processing allowance and position of the foam sandwich composite material;

S3. According to the machining allowance of the part, place a micrometer piece equal to the thickness of the machining allowance between the corner positioning block and the contour of the tooling, and push the corner positioning block towards the contour of the tooling to ensure the distance between the corner positioning block and the contour of the tooling. The gap between them is equal to the thickness of the micrometer slice;

S4, remove the micrometer pieces everywhere, and tighten the bolts;

S5. Bond the foam sandwich composite material parts to the surface of the tooling. Due to the limit of the positioning device, the device can accurately ensure the positioning accuracy of the foam sandwich composite material parts processing.

Further, the gap between the angular positioning block and the contour of the tooling is equal to the thickness of the micrometer, and the thickness of the micrometer is 0.01mm to detect the gap.

Further, the processing positioning allowance is freely controlled by the angular positioning block and the clearance of the tooling contour.

Further, the number of the bolts is 2.

Further, the number of the corner positioning block is one.

Further, the angle-shaped positioning block is processed from an aluminum block.

Further, two grooves need to be provided for the corner positioning block.

Further, the corner positioning block is equipped with two bolts to ensure that the screw rod of the bolt can be inserted into the groove in the corner positioning block and can move freely along the length direction of the groove.

Further, two threads are set on the tooling where the angular positioning block needs to be installed, and the thread diameter matches the direction of the bolt.

Beneficial effects of the present invention:

Compared with the prior art, the present invention has the following advantages: using a micrometer to control the margin, the accuracy can reach 0.01mm, which is higher than the traditional visual positioning accuracy; only need to tighten a few screws to fix the positioning device, compared with the traditional Curved surface scribing, the operation is more convenient; because the positioning time is greatly shortened, the production cycle is shorter than the traditional method; the positioning operation of the parts is simple; the use of this device can ensure the accuracy of the parts and improve the product qualification rate; realize the foam of different shapes Sandwich composite processing positioning.

Description of drawings

Fig. 1 is a positioning device figure in the present invention;

In the figure: 1-bolt, 2-angular positioning block, 3-tooling, 4-micrometer, 5-foam sandwich composite material parts.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

A method for processing and positioning an aircraft sandwich foam composite material, the steps of which are as follows:

S1. First paste the double-sided tape on the surface of the tooling for parts processing;

S2. Install a positioning device on the contour of the tooling. The device includes a bolt 1 and an angle positioning block 2. The bolt 1 is used to fix the position of the angle positioning block 2, and the angle positioning block 2 is used to control the processing allowance of the foam sandwich composite material and location;

S3. According to the machining allowance of the part, place a micrometer 4 equal to the thickness of the machining allowance between the corner positioning block 2 and the tooling contour 3, and push the corner positioning block 2 toward the tooling contour to ensure that the corner positioning block The gap between 2 and the tooling profile 3 is equal to the thickness of the micrometer 4;

S4, remove the micrometer 4 everywhere, and tighten the bolt 1;

S5. Bonding the foam sandwich composite material part 5 to the surface of the tooling. Due to the limit of the positioning device, the device can accurately ensure the positioning accuracy of the foam sandwich composite material part processing.

Further, the gap between the angular positioning block 2 and the tooling profile 3 is equal to the thickness of the micrometer 4, and the micrometer 4 uses a thickness of 0.01 mm to detect the gap.

Further, the machining positioning allowance is freely controlled by the angular positioning block 2 and the gap with the tooling contour 3 .

Further, the number of the bolts 1 is two.

Further, the number of the corner positioning block 2 is one.

Further, the angle-shaped positioning block 2 is processed from an aluminum block.

Further, the corner positioning block 2 needs to be provided with two grooves.

Further, the angle positioning block 2 is equipped with two bolts 1 to ensure that the screw of the bolt 1 can be inserted into the groove in the angle positioning block 2 and can move freely along the length direction of the groove.

Further, two screw threads are set at the place where the angular positioning block 2 needs to be installed on the tooling, and the screw diameter matches the bolt 1 direction.

Specific example plan:

The aluminum block is processed into an angle-shaped positioning block 2 by using a numerical control processing method. The height and width of the corner positioning block 2 vary according to the size of the tooling. The height is usually about 20mm higher than the tooling, and the width is about 10 times the machining allowance;

Angular positioning block 2 needs to be provided with 2 grooves, the width of which depends on the size of the screw, which is 1 mm larger than the diameter of the screw rod, and the length of the groove is about 5 times the margin.

Two bolts 1 are configured for each corner positioning block 2 to ensure that the screw of the bolt 1 can be inserted into the groove in the corner positioning block 2 and can move freely along the length direction of the groove.

Set 2 threads on the tooling where the angular positioning block 2 needs to be installed, and the thread diameter matches the bolt 1 direction.

In all the schemes mentioned above, those involving the connection between two parts can choose welding, bolt and nut fit connection, bolt or screw connection or other known connection methods according to the actual situation, so I won’t go into details here. Where there is a written fixed connection, the preferred consideration is welding. Although the embodiment of the present invention has been shown and described, it can be understood by those of ordinary skill in the art that without departing from the principle and spirit of the present invention Various changes, modifications, substitutions and variations may be made to these embodiments, the scope of the present invention being defined by the appended claims and their equivalents.

Claims (9)

1. A method for processing and positioning an airplane sandwich foam composite material is characterized by comprising the following steps:

s1, firstly, sticking a double-sided adhesive tape on the surface of a tool for part processing;

s2, installing a positioning device on the outline of the tool, wherein the device comprises a bolt (1) and an angle-shaped positioning block (2), the bolt (1) is used for fixing the position of the angle-shaped positioning block (2), and the angle-shaped positioning block (2) is used for controlling the machining allowance and position of the foam sandwich composite material;

s3, according to the machining allowance of the part, a micrometer piece (4) equal to the thickness of the machining allowance is placed between the angle-shaped positioning block (2) and the tool outline (3), the angle-shaped positioning block (2) is pushed tightly towards the tool outline, and the gap between the angle-shaped positioning block (2) and the tool outline (3) is guaranteed to be equal to the thickness of the micrometer piece (4);

s4, removing the thousands of the divided pieces (4) and screwing the bolts (1);

and S5, bonding the foam sandwich composite material part (5) to the surface of the tool, wherein the positioning device can accurately ensure the positioning accuracy of the foam sandwich composite material part due to the limit of the positioning device.

2. The processing and positioning method for the sandwich foam composite material of the airplane as claimed in claim 1, characterized in that: the gap between the angle-shaped positioning block (2) and the tool outline (3) is equal to the thickness of the thousand-piece (4), and the thousand-piece (4) adopts a 0.01mm thickness thousandth piece to detect the gap.

3. The processing and positioning method for the sandwich foam composite material of the airplane as claimed in claim 1, wherein the method comprises the following steps: the clearance between the processed positioning allowance and the tool outline (3) is freely controlled by the angle-shaped positioning block (2).

4. The processing and positioning method for the sandwich foam composite material of the airplane as claimed in claim 1, wherein the method comprises the following steps: the number of the bolts (1) is 2.

5. The processing and positioning method for the sandwich foam composite material of the airplane as claimed in claim 1, wherein the method comprises the following steps: the number of the angle-shaped positioning blocks (2) is 1.

6. The processing and positioning method for the sandwich foam composite material of the airplane as claimed in claim 1, wherein the method comprises the following steps: the angle-shaped positioning block (2) is formed by processing an aluminum block.

7. The processing and positioning method for the sandwich foam composite material of the airplane as claimed in claim 1, wherein the method comprises the following steps: the angle-shaped positioning block (2) is required to be provided with 2 grooves.

8. The processing and positioning method for the sandwich foam composite material of the airplane as claimed in claim 7, wherein the method comprises the following steps: the angle-shaped positioning block (2) is provided with 2 bolts (1), so that screws of the bolts (1) can be inserted into grooves in the angle-shaped positioning block (2) and can freely move along the length direction of the grooves.

9. The processing and positioning method for the sandwich foam composite material of the airplane as claimed in claim 1, characterized in that: the position of the tool where the angle-shaped positioning block (2) needs to be installed is provided with 2 threads, and the thread diameter is matched with the direction of the bolt (1).

Images