CN105252003A

CN105252003A - Additive manufacturing method for aircraft wing spar components

Info

Publication number: CN105252003A
Application number: CN201510755589.0A
Authority: CN
Inventors: 王福德; 曾晓雁; 曹嘉明; 高明
Original assignee: Huazhong University of Science and Technology
Current assignee: Huazhong University of Science and Technology
Priority date: 2015-11-09
Filing date: 2015-11-09
Publication date: 2016-01-20
Anticipated expiration: 2035-11-09
Also published as: CN105252003B

Abstract

The invention discloses an additive manufacturing method for aircraft wing spar components. Each aircraft wing spar component comprises a web, edge strips and stand columns. The additive manufacturing method comprises the following steps: while processing, firstly mounting a base plate on a position changing machine, taking a state that a working surface of the base plate is parallel to the ground as an initial state, depositing two edge strips and the web on the base plate, independently depositing the web when height of the two edge strips and the web reaches designed height at which the lower surface of the stand column to be deposited in the next step is located, enabling a height difference between the web and the edge strips to reach a thickness of the stand column, turn a workbench of the position changing machine around a turnover shaft by 90 degrees, enabling the web to be parallel to the ground, and arranging the web below the edge strips; then, depositing the stand columns according to a designed dimension, reversely turn the workbench of the position changing machine around the turnover shaft by 90 degrees after the stand column is deposited so as to enable the workbench of the position changing machine to return to the initial state, then, depositing the two edge strips and the web, continuously repeating the process; and finally, completing the processing of the aircraft wing spar components. The components processed by the method are uniform and consistent in tissue, and are very small in deformation.

Description

A kind of increasing material manufacture method of swing spar class part

Technical field

The invention belongs to and increase material manufacture field, be specifically related to the increasing material manufacture method of swing spar class part (as Fig. 2 shows).

Background technology

A kind of swing spar class part is made up of web, edge strip, column three part.At present for the increasing material manufacture method of this swing spar class part, can be electric arc wire feeding and increase material manufacture or the manufacture of laser powder feeding fusing increasing material.Traditional method is horizontal, selects and the sizable substrate of web, machines metacoxal plate and be web.Substrate is selected the deposition starting point of edge strip and column, and according to the size designed by described column and edge strip, column described in layer by layer deposition and edge strip, until height of deposition reaches the height of edge strip and column, its machining sketch chart such as Fig. 1 shows.

The procedure of processing of the horizontal of swing spar class part is:

(1) substrate is clamping;

(2) on substrate, select the deposition starting point of column and edge strip, deposit each column and two edge strips, as Fig. 1 (a)-(b) shows by the size of the design of column and edge strip and processing sequence;

(3) constantly repeat step (2), until the height of column and edge strip reaches the height of design, stop deposition, as Fig. 1 (c) shows;

In increasing material manufacture process, under local heat source's effect, on substrate and the Temperature Distribution of deposition fraction is all uneven, cause each position dilation on substrate and part inconsistent, adopt the method for horizontal to add man-hour using substrate as web, because web area is larger, and length-width ratio is larger, deposited in rear part and had larger residual stress, be very easy to distortion, therefore machining accuracy is deteriorated.In addition because substrate is for rolling tissue, processing metacoxal plate is web, and edge strip and column are weld structure, both differ greatly, and therefore organize different at edge strip and column from both sides, web junction, mechanical property is also different, easy generation place stress is concentrated, and thus easily cracks.

Summary of the invention

For prior art existing problems, the present invention proposes a kind of increasing material manufacture method of swing spar class part, and described swing spar class part is made up of web, edge strip, column three part.This method is vertical processing, first substrate is arranged on positioner, it is original state that substrate facing surface is parallel to ground, substrate is selected deposition starting point, deposit two edge strips and web, when the height of two edge strips and web reaches the design height residing for next step column lower surface that will deposit, deposit web separately again, the difference in height of web and edge strip is made to reach described column thickness, positioner workbench is overturn 90 ° around trip shaft, web is parallel to ground, web is below edge strip, then described column is deposited by design size, after, by positioner workbench around trip shaft reverse flip 90 °, get back to original state, carry out the deposition of two edge strips and web again, continuous repetition said process, finally complete the increasing material manufacture of swing spar class part, its machining sketch chart is as Fig. 3.

The increasing material of swing spar class part as above manufactures, and it comprises the steps:

(1) be arranged on positioner by substrate, substrate facing surface is in be parallel to the original state on ground, substrate facing surface is selected the deposition starting point of web and two edge strips, and web is parallel with the intersection of substrate facing surface and the trip shaft of positioner;

(2) by design size, layer by layer deposition two edge strip and web, the height making it deposit reaches the design height residing for the lower surface of the column that next step will deposit, and stops deposition;

(3) continue the described web of deposition, until its height is described column design thickness with the difference of described edge strip height, stop deposition;

(4) positioner workbench is overturn 90 ° around trip shaft, make substrate facing surface perpendicular to ground, described web is in the below of described edge strip, according to the design size of column on described web, deposit described column, when the height of deposition of described column reaches the width of described edge strip, stop deposition;

(5) by positioner workbench around trip shaft reverse flip 90 °, make substrate be in original state, described web and column selected the deposition starting point of described web and edge strip;

(6) constantly repeat step (2), (3), (4), (5), until complete all depositions, form swing spar class part.

Further, in the increasing material manufacture method of described swing spar class part, deposition process used is electric arc wire feeding fusing or laser powder feeding fusing.

Further, in the increasing material manufacture method of described swing spar class part, material used comprises aluminium alloy, titanium alloy, high-strength steel.

Further, in the increasing material manufacture method of described swing spar class part, positioner used is diaxon positioner, comprises gyroaxis and trip shaft, and the workbench of positioner can overturn around trip shaft, and wraparound rotating shaft rotates.

The increasing material manufacture method of the present invention to swing spar class part is improved, and can obtain good forming quality, have the following advantages:

(1) because web is generated by deposition process, do not need the substrate suitable with web size, substrate used thereof and part end face sizableness, the substrate used compared with the processing method of horizontal is little, therefore be out of shape also very little, comparatively horizontal processing method is high for the machining accuracy of part.

(2) in the present invention, edge strip is consistent with the tissue of web with column is all weld structure, and performance is consistent, avoids the sudden change of the structure and properties of edge strip and column and web junction, not easily occurs crackle.

Accompanying drawing explanation

Fig. 1 (a)-(c) is the process schematic diagram of swing spar class part conventional method;

Fig. 2 is the schematic diagram of swing spar class part;

Fig. 3 (a)-(h) is swing spar class part process schematic diagram of the present invention;

Fig. 4 is the part that vertical machines;

Label 1,2,3,4,5 in Fig. 1 (a) is the sedimentary sequence of each column in prior art, 6-substrate, 7-edge strip ground floor, 8-edge strip, 9-web, 10-column, 11-edge strip ground floor, 12-web ground floor, 13-substrate, 14-column ground floor.

Detailed description of the invention

In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.In addition, if below in described each embodiment of the present invention involved technical characteristic do not form conflict each other and just can mutually combine.

The increasing material manufacture of the above-mentioned swing spar class part that the present embodiment will realize, its part web design size is 1000mm*200mm*8mm, edge strip is of a size of 1000mm*150mm*8mm, five columns are dispersed with between two edge strips, each column equidistantly distributes, and column size is 150mm*150mm*8mm.Substrate used thereof is of a size of 250mm*220mm*40mm, and welding wire is the TC4 titanium alloy welding wire of diameter 1.2mm, and baseplate material is rolling TC4 titanium alloy, and using electric arc wire feeding to increase material manufacture welding current is 108A, and wire feed rate is 1.5m/min, and speed of welding is 3mm/s.Concrete manufacturing step is as follows:

(1) be arranged on positioner by substrate, substrate facing surface is in be parallel to the original state on ground, substrate is selected the deposition starting point of coxosternum and two edge strips, and web is parallel with the intersection of substrate facing surface and the trip shaft of positioner;

(2) by design size, layer by layer deposition two edge strip and web, often deposit one deck welding gun and raise 1mm, until the height of described web and edge strip deposition reaches next step design height residing for column lower surface that will deposit, the height of described web and this step of edge strip deposition is 196mm, as Fig. 3 (a), (b), (c) show;

(3) continue web described in layer by layer deposition, often deposit one deck welding gun and raise 1mm, until described web height and described edge strip difference in height are the design thickness of described column, in the present embodiment, difference in height is 8mm, as Fig. 3 (d) shows;

(4) positioner workbench is overturn 90 ° around trip shaft, make substrate perpendicular to ground, now described web is in the below of described edge strip; According to the design size of column on described web, column described in layer by layer deposition, often deposit one deck welding gun and raise 1mm, when height of deposition to described column reaches the width of described edge strip, stop deposition, the height of deposition of this example central post is 150mm, as Fig. 3 (e), (f) show;

(5) by positioner workbench around trip shaft reverse flip 90 °, make substrate be in original state, select the deposition starting point of described web and edge strip at the upper surface of described web and column, as Fig. 3 (g) shows;

(6) constantly repeat step (2), (3), (4), (5), until complete all depositions, form swing spar class part, as Fig. 3 (h), Fig. 4 show.

Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present invention; not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.

Claims

1. an increasing material manufacture method for swing spar class part, is characterized in that, comprise the steps:

2. increasing material manufacture method according to claim 1, is characterized in that: described deposition process is electric arc wire feeding fusing or laser powder feeding fusing.

3. increasing material manufacture method according to claim 1, is characterized in that: the material manufacturing such part comprises aluminium alloy, titanium alloy, high-strength steel.