CN102569984A - Compound forming method for large-curvature double-curve-degree high-accuracy antenna panel - Google Patents

Abstract

The present invention is a composite forming method of a high-curvature double-curvature high-precision antenna panel. The antenna panel specifically includes three layers of pre-stretched aluminum plates, two layers of durable honeycomb cores and several embedded parts for connecting the back frame; Among them, the three-layer aluminum plate is a pre-stretched working plate, a central joint plate and a back plate that are cut and trimmed according to the template; the forming method at least includes: the three-dimensional construction of the three-layer plate of the high-curvature double-curvature high-precision antenna panel Mold, spatial geometric expansion of the three-layer board and positioning on the nail bed, laser processing of the three-layer aluminum board template, manufacturing of the solid mold according to the work board profile, pre-stretching of the three-layer aluminum board and cutting and trimming according to the template, nail height The calculation and positioning of the three-layer pre-stretched plate on the high-precision nail bed; the laying of the sandwich structure layer by layer is the main process of manufacturing the high-curvature double-curvature high-precision antenna panel.

Description

A Composite Forming Method of Large Curvature Hypercurvature and High Precision Antenna Panel

technical field

The present invention relates to a composite forming method of a high-curvature double-curvature high-precision antenna panel, in particular to a high-curvature double-curvature continuous surface high-precision honeycomb sandwich structure antenna panel forming method, which belongs to mechanical engineering/sheet metal forming field.

Background technique

With the rapid development of satellite communications, radio measurement and control, deep space exploration and large radio telescopes, not only the demand for antennas is more and more extensive, but also the accuracy, environmental adaptability and reliability of the antenna antenna panel are raised. Require. As the frequency of electromagnetic waves received by outdoor antennas is getting higher and higher, the RMS value (root mean square value) of the antenna surface is required to be higher and higher. Compared with the antenna panel in the microwave anechoic chamber, the outdoor antenna is in a much more complicated environment, including the invasion of wind, rain, lightning, and climate change throughout the year. This requires that the outdoor antenna has high precision and cannot be damaged by the complex external environment within the service life. Although the existing slit manufacturing process can meet the precision requirements, it is easy to cause damage to the local profile; although the aircraft skin manufacturing process can obtain a continuous surface and a relatively complete structure, the forming accuracy is poor.

The high-precision antenna panel involved in this application is composed of three layers of pre-stretched aluminum plates, two layers of durable non-porous honeycomb cores, core glue and connecting embedded parts. It is laid layer by layer on a flexible multi-point mold. The vacuum bag is sealed to form a negative pressure, and the honeycomb sandwich structure antenna panel (hereinafter referred to as the sandwich panel) is formed after the glue is cured at room temperature.

In addition, as known by the applicant during a large amount of research and experimentation, there are mainly the following problems in the prior art:

1. The three-layer aluminum plate of the high-precision antenna panel manufactured before adopts the technology of slit stress relief, which is only suitable for the manufacture of antenna panels with small curvature. For the manufacture of antenna panels with large curvature, the springback of the overall structure is still large, and the forming accuracy is poor.

2. The slotting scheme destroys the integrity of the three-layer aluminum plate, especially the gap between the working plate and the back plate. Although the gaps on the surface of the antenna panel manufactured by this scheme are sealed with conductive glue, the long-term outdoor weathering will probably cause the conductive glue to fall off, and then corrode the honeycomb core, resulting in a change in the local shape of the antenna panel , affecting electrical performance. Therefore, the antenna panel manufactured by the slotting scheme is not suitable for outdoor use in complex and changeable environments, and there is an urgent need for a process scheme with a continuous surface and high molding precision to form a high-precision antenna panel with large curvature.

3. The existing continuous surface stress release forming method is mainly by opening narrow grooves that do not exceed two-thirds of the thickness of the aluminum plate, but the stress release effect is not as good as the slotting method, and it is only suitable for forming high-precision panels with small curvature. For panels with slightly larger curvature, the forming accuracy is poor.

Contents of the invention

The purpose of the present invention is to provide a composite forming method of a high-curvature hyperbolic high-precision antenna panel to achieve the technical goals of continuous surface, high precision, high rigidity, and light weight required by outdoor antennas.

The basic principle of the present invention is as follows: modeling is carried out according to the position of a single antenna panel in space, and the blank processing diagram of the three-layer aluminum plate is obtained by using the expansion algorithm of the space curved surface, and its relative position is determined; Nail height value, adjust the nail bed according to the nail height data, spread the backing plate and position; use the working surface of the single antenna panel as a digital model to process a solid mold, and use the stretching method to pre-stretch the three-layer aluminum plate ; According to the blank processing drawing of the three-layer aluminum plate, the cutting template of the stretched sheet is made and the stretched sheet is cut. Apply glue on the contact surface of the three-layer aluminum plate and the two-layer honeycomb, lay it on the backing plate layer by layer, and position it; cover it with a vacuum bag and evacuate it for curing. After the curing is completed, the antenna panel is taken out from the bed of nails and edge-banded. This has just realized the manufacturing goal of the large-curvature continuous surface, high-precision, high-rigidity, light-weight antenna antenna panel suitable for outdoors.

The present invention is a composite forming method of a high-curvature double-curvature high-precision antenna panel. The high-precision antenna panel is a sandwich structure, which specifically includes three layers of pre-stretched aluminum plates, two layers of honeycomb cores and embedded parts for connection. ; Among them, the three-layer aluminum plate is the working plate, the intermediate plate and the back plate; the two-layer honeycomb core is the first honeycomb core and the second honeycomb core, and the embedded parts are connected to the intermediate plate with standard screws.

The object of the present invention is achieved like this, and the present invention comprises steps:

1. Under the YOZ coordinate system, import the theoretical curve of the reflective surface of the work plate or draw the theoretical curve according to the curve equation, and use the theoretical curve as the busbar to rotate around the Z axis to form the theoretical surface of the work plate;

2. According to the block scheme, the theoretical surface of the working board is divided to form a single theoretical surface of the working board;

3. Taking the lowest point of the theoretical curved surface of the single working board as the base point, establish the tangent plane of the theoretical curved surface of the single working board, and then expand the theoretical curved surface of the single working board on the tangent plane to form the unfolded material of the single working board;

4. Based on the theoretical curve of the single working plate, offset 49.5mm upward along the normal direction to obtain the theoretical curve of the single central joint plate, and use the theoretical curve of the single central joint plate as the bus to rotate one circle around the Z axis to form the central joint plate theory surface;

5. Then, according to the requirements of the edge banding process, the theoretical curved surface of the single central joint plate is divided, and the connection holes of the embedded parts are established on the theoretical curved surface of the single central joint plate;

6. Based on the lowest point of the theoretical surface of the single central joint plate, establish the tangent plane of the single central joint plate theoretical surface, and then expand the theoretical surface of the single central joint plate on the tangent plane to form the expansion of the single central joint plate material;

7. Based on the theoretical curve of the single working plate, offset 98.5mm upward along the normal direction to obtain the theoretical curve of the single back plate, and use the theoretical curve of the single back plate as the busbar to rotate one circle around the Z axis to form the theoretical surface of the back plate;

8. According to the block plan, divide the theoretical surface of the back plate to form a single theoretical surface of the back plate, and establish the center position marking hole of the embedded part on the theoretical surface of the single back plate;

9. Taking the lowest point of the theoretical curved surface of the single backplane as the base point, establish the tangent plane of the theoretical curved surface of the single backplane, and then unfold the theoretical curved surface of the single backplane on the tangent plane to form the unfolded material of the single backplane;

10. Establish the process compensation surface of a single working board, use the nail height calculation software to calculate the nail height data, and adjust the high-precision nail bed to form the envelope surface of the theoretical curved surface of a single working board;

11. Determine the relative position between the unfolding base point of the three-layer aluminum plate and the origin of the nail bed coordinates, and position the three-layer aluminum plate on the nail bed;

12. Manufacture the solid mold of a single working plate and pre-stretch the three-layer aluminum plate.

13. According to the expanded material samples obtained in steps 3, 6 and 9, the pre-stretched aluminum plates are respectively cut and trimmed to obtain pre-stretched working plates, intermediate plates and back plates;

14. Lay the stainless steel backing plate on the nail bed that has adjusted the envelope surface and position it, and lay it on the working plate, the first honeycomb core, the middle joint plate and embedded parts, the second honeycomb core and the back plate in sequence. On the backing plate, and on the back of the working board (the connecting surface of the working board and the first honeycomb core), the two sides of the intermediate plate and the back side of the backboard (the connecting surface of the backboard and the second honeycomb core) are coated with adhesive, and then Cover with a sealing cover and vacuumize and solidify, and finally obtain a high-precision honeycomb sandwich structure antenna panel with a large curvature continuous surface.

The high-precision antenna panel with large curvature continuous surface of the present invention has a working plate thickness of 1.5 mm, a middle plate thickness of 1 mm, a back plate thickness of 1.5 mm and a honeycomb core thickness of 48 mm.

The present invention is a compound forming method of high-precision antenna panel with large curvature and double curvature. The forming method combined with the pre-stretching forming process of the multi-layer aluminum plate is used to manufacture the high-precision antenna panel with large curvature and double curvature. The amount of rebound can improve the degree of mold sticking on the high-precision nail bed; then use the vacuum negative pressure to cement the envelope surface formed by the high-precision flexible nail bed, and after curing and forming, a double sandwich structure of three-layer aluminum plate and two-layer honeycomb is obtained. Its rigidity is very high, which is conducive to the maintenance of the profile; finally, the technical goals of large curvature continuous surface, high precision, high rigidity and light weight required by outdoor antennas are realized.

Description of drawings

The three-dimensional model of three-layer aluminum plate in the inventive method of Fig. 1

The spatial geometry of the three-layer aluminum plate in the method of the present invention in Fig. 2 is expanded and positioned on the nail bed

In Fig. 3-1 the template of working board development material in the method of the present invention

Fig. 3-2 The template of the spliced plate development material in the method of the present invention

Figure 3-3 The template of the backboard development material in the method of the present invention

Three-layer aluminum plate pre-drawing schematic diagram in the method of the present invention in Fig. 4

Nail height calculation flowchart in the method of the present invention in Fig. 5

The layout diagram of the three-layer pre-drawn aluminum plate on the nail bed in the method of the present invention in Fig. 6

Fig. 7 is a schematic diagram of forming a high-curvature hyperbolic high-precision antenna panel in the method of the present invention

The labels and symbols in the figure are explained as follows:

1. Working board; 2. Intermediate board; 3. Back board; 4. Backing board;

5. The first honeycomb core; 6. The second honeycomb core; 7. Embedded parts;

11. The theoretical surface of the working plate; 12. The theoretical surface of the intermediate plate; 13. The theoretical surface of the back plate;

21. Expanded material for a single working plate; 22. Expanded material for a single intermediate joint plate; 23. Expanded material for a single back plate;

24. The relative position of the base point of the three-layer aluminum plate expansion; 25. The outline of the outer edge of the backing plate;

26. The positioning round hole of the three-layer aluminum plate; 27. The positioning long hole of the three-layer aluminum plate;

31. Long hole for positioning of the working plate model; 32. Round hole for positioning of the working plate model;

33. Positioning long hole of intermediate plate model; 34. Positioning round hole of intermediate plate model; 35. Connection hole of embedded parts; 36. Positioning long hole of back plate model; 37. Positioning round hole of back plate model; 38. Embedded mark hole in the center of the workpiece; 41. The solid mold manufactured according to the theoretical surface of the working plate;

42. Theoretical curved surface outline of the work plate 43. Pre-drawn aluminum plate;

61. The outline of the outer edge of the backing plate; 62. The outline of the outer edge of the three-layer pre-drawn aluminum plate; 63. The positioning long hole of the three-layer pre-drawn aluminum plate; 64. The positioning round hole of the three-layer pre-drawn aluminum plate;

Detailed ways

The invention relates to a compound forming method of a high-curvature double-curvature high-precision antenna panel. The high-precision antenna panel is a sandwich structure, which specifically includes three layers of pre-stretched aluminum plates, two layers of durable non-porous honeycomb cores and a connecting A number of embedded parts; the three-layer aluminum plate is the working plate 1, the intermediate plate 2 and the back plate 3, and the two-layer honeycomb core is the first honeycomb core 5 and the second honeycomb core 6; the forming method includes: high-precision The establishment of the three-layer aluminum plate model of the honeycomb sandwich structure, the manufacture of the solid mold of the working plate, the cutting and trimming of the three-layer aluminum plate, the establishment of the process compensation surface, the calculation of the nail height and the positioning of the three-layer pre-stretched formed plate on the high-precision nail bed . Among them, the template, cutting and trimming of the three-layer aluminum plate are the elements that directly affect the profile accuracy of the sandwich plate. The solid mold of the working plate is the key point to realize the preliminary forming of the three-layer aluminum plate. The basis of the network surface, the precise positioning of the three-layer pre-stretched plate on the high-precision nail bed is the key to the manufacture of large curvature hyperbolic high-precision antenna panels.

The present invention is a compound forming method of a high-curvature hypercurvature high-precision antenna panel. The overall realization process is based on the characteristics of the busbar equation or curve of the single antenna panel, the spatial position of the embedded part and the positioning hole of the antenna panel. Carry out three-dimensional modeling, obtain the sample of the three-layer aluminum plate through the expansion of the space surface, and then process it through laser cutting to obtain the aluminum plate sample with accurate edge contour and positioning hole position. Use the digital model of the working surface of the single antenna panel to manufacture the solid mold of the working plate, then place the three-layer aluminum plate on the solid mold for stretching, and use the three-layer aluminum plate template to cut and trim the edges respectively to obtain a pre-stretched shape with positioning holes three-layer aluminum plate. Establish the process compensation surface of the working surface of the single antenna panel and calculate the nail height, adjust the nail bed, lay the pre-stretched three-layer aluminum plate and the two-layer honeycomb sandwich structure on the adjusted nail bed layer by layer and glue them together, after sealing, Vacuumize and hold the pressure for a certain period of time. After the glue is cured, a high-precision antenna panel with a large curvature and hypercurvature is formed. Finally, edge banding of the antenna panel is carried out with the edge banding parts formed by the rubber bag, and the manufacture of the high-curvature hyperbolic high-precision antenna panel is realized. A specific description is given below.

Step (1) Establish a three-dimensional model of the three-layer aluminum plate according to the busbar equation or curve

In the YOZ coordinate system (that is, the panel design coordinate system), draw or import the theoretical curve of the reflective surface of the work panel according to the curve equation, and use the theoretical curve as the busbar to rotate around the Z axis to form the theoretical curved surface of the work panel; according to the block scheme, the The theoretical curved surface of the working board is divided to form the theoretical curved surface of a single working board 11; based on the theoretical curved surface of the single working board, it is offset 49.5mm upward along the normal direction to obtain the theoretical curve of the single central joint plate. The curve is that the busbar rotates around the Z axis to form a theoretical curved surface of the central joint plate, and then according to the requirements of the edge banding process, the theoretical curved surface 12 of the single central joint plate is divided, and the connection of the embedded parts is established on the theoretical curved surface of the single central joint plate Hole; Based on the theoretical curve of the single working plate, it is offset 98.5mm upward along the normal direction to obtain the theoretical curve of the single back plate, and the theoretical curve of the single back plate is used as the busbar to rotate one circle around the Z axis to form the theoretical surface of the back plate; according to In the block scheme, the theoretical curved surface of the backplane is divided to form a single theoretical curved surface 13 of the backplane, and a center position marking hole of the embedded part is established on the theoretical curved surface of the single backplane. As shown in Figure 1.

Step (2) Spatial geometric expansion of the three-layer aluminum plate and its positioning on the nail bed

Taking the lowest point of the theoretical curved surface of the single working board as the base point, the tangent plane of the theoretical curved surface of the single working board is established, and then the theoretical curved surface of the single working board is expanded on the tangent plane to obtain the unfolded material 21 of the single working board; The lowest point of the theoretical curved surface of the central joint plate is the base point, and the tangent plane of the theoretical curved surface of the single central joint plate is established, and then the theoretical curved surface of the single central joint plate is expanded on the tangent plane to obtain the unfolded material 22 of the single central joint plate; The lowest point of the theoretical curved surface of the single backplane is used as the base point, and the tangent plane of the theoretical curved surface of the single backplane is established, and then the theoretical curved surface of the single backplane is developed on the tangent plane to obtain the developed material 23 of the single backplane. Taking the tangent plane of the theoretical curved surface of a single working plate as the datum plane, project the lowest point of the theoretical curved surface of the middle joint plate and the back plate onto the datum plane, and measure the relative distance between the lowest point of the theoretical curved surface of the middle joint plate and the back plate and the theoretical curved surface of the working plate The distance from the lowest point, that is, the relative position of the base point of the three-layer aluminum plate expansion 24. Take the tangent plane at the lowest point of the theoretical curved surface of the single work board as the sketch plane, and draw the projected figure 25 (generally a rectangle) of the process compensation surface of the single work board. The projection figure is 100 to 200 millimeters larger than the projected outer edge of the work panel on the sketch plane, so that there are 2 to 3 rows of nail posts outside the edge of the work panel after positioning on the nail bed, ensuring the forming accuracy of the work panel edge. The geometric center of the projection figure is the coordinate origin of the bed of nails. Array ball studs with a diameter of 12 mm at a step distance of 50 mm, and determine the positioning holes at the position of the studs as close as possible to the edge of the work plate, one end is a round hole 26, the other end is a long hole 27, and the round hole and the long hole On the same row or column of studs. In order to reduce the number of positioning holes, the positioning holes of the three-layer aluminum plate are generally designed at the same nail post. In this way, the developed material of the working plate with the positioning hole, the developed material of the intermediate joint plate and the developed material of the back plate are obtained.

Step (3) Laser cutting the sample of the three-layer aluminum plate

In order to obtain a pre-drawn aluminum panel with sufficiently precise edges and pilot holes, a template with more precise laser-cut edges and pilot holes is required. According to the unfolded material of the working plate with positioning holes, the developed material of the intermediate plate and the developed material of the back plate, the samples of the three-layer pre-stretched aluminum plate are respectively drawn and laser cut. In order to facilitate the cladding of the template on the pre-stretched aluminum plate, the template is made hollow and the edge of the template is made as narrow as possible, as shown in Figure 3-1 to Figure 3-3.

Step (4) Pre-stretch the three-layer aluminum plate and cut it according to the model

Taking the theoretical curved surface of a single working plate as a digital model, a solid mold 41 is milled and the outline 42 of the theoretical curved surface of the working plate is marked on the surface of the grinding tool. Aluminum sheets are pre-drawn in the freshly quenched state. A center line is then drawn on the pre-drawn aluminum sheet 43 . Cut the pre-stretched aluminum plate according to the outer edge profile scored on the solid mold at a position away from the positioning hole. Align the center line of the template of the working board development material with the center line of the pre-drawn aluminum plate 43, and move to the pre-cut outer edge contour along the center line of the pre-drawn aluminum plate 43. Then the sample plate of the working board development material is wrapped on the pre-drawn aluminum plate 43, and the edge contour and positioning hole positions are drawn and cut and punched. In this way, a pre-drawn work board is obtained. As shown in Figure 4.

Since the surface accuracy requirements of the intermediate plate and the back plate are not high, in order to save costs, they are drawn on the same solid mold. Although the center line of the three-layer aluminum plate is the same, the outline of the outer edge is different. In the process of cutting the center joint plate and the back plate, it is difficult to determine the edge position of the template, as long as the template of the center plate and the back plate is covered with the aluminum plate as much as possible, as for the edge of the center plate and the back plate As long as the spatial position is close to the outline of the outer edge of the work plate drawn on the solid mold. According to the method of cutting the stretch work plate, wrap the template of the intermediate plate and the back plate on the pre-drawn aluminum plate, and draw the outer edge of the intermediate plate and the back plate when the outer edge of the sample plate is close to the contour line of the solid mold Edge profile and positioning holes, cutting and trimming to get the pre-stretched formed plate of the intermediate plate and the back plate with positioning holes.

Step (5) Calculate the nail height

Import the process compensation surface of the single work plate into the nail height calculation software, set the nail bed size and the radius of the ball head of the nail post according to the actual nail bed, and then offset the process compensation surface of the single work plate, and the offset direction is the process On the convex side of the compensation surface, the offset distance is the thickness of the backing plate 4 plus the radius of the stud ball head. Then project to the manufacturing coordinate plane and select the sideline where the independent variable of the nail height data is located, calculate the nail height data corresponding to the process compensation surface, and output the three-dimensional nail column arrangement diagram, the nail height calculation flow chart is shown in Figure 5, the specific nail height The data is shown in Table 1 below. X and Y are the coordinate values of the nail column on the manufacturing plane, and Z is the displacement of the nail column from the manufacturing plane to the process compensation surface.

Table 1

Step (6) Positioning of the three-layer pre-stretched aluminum plate on the high-precision nail bed

According to Figure 2, pull out the nail post at the location of the positioning hole and replace it with a positioning pin. When the panel is manufactured, the positioning holes of the pre-stretched three-layer aluminum plate are aligned with the positioning pins, and the layout of the three-layer pre-stretched aluminum plate on the nail bed is obtained.

Step (7) Lay the sandwich structure layer by layer

The layer-by-layer laying of the interlayer structure is the main process of manufacturing the high-curvature double-curvature high-precision antenna panel:

(1) A backing plate 4 is placed on the nail bed envelope surface adjusted according to the nail height data calculated in step (5) and positioned;

(2) Put the front of the working plate 1 on the backing plate 4 coated with lubricating oil, and use the positioning pins and positioning holes for positioning;

(3) Glue is applied on the back of the working board 1, and the first honeycomb core 5 is laid on the glue layer;

(4) Then the embedded part 7 for connection is installed on the center joint plate 2 by standard screws, and glue is applied on the side of the center joint plate without the embedded part and laid on the first honeycomb layer 5 for positioning;

(5) Apply glue on the side of the intermediate plate 2 with embedded parts, and place the second honeycomb core 6;

(6) Place the glue-coated back plate 3 with the glue side down on the second honeycomb core 6 and position it, thus completing the layer-by-layer laying process of the sandwich structure.

(7) Finally, it is sealed with a vacuum bag film, vacuumed, and the pressure is kept at about 0.03Mpa for 36 hours, and a high-curvature hypercurvature high-precision antenna panel is formed, as shown in Figure 7.

Claims (2)

1. the combined shaping method of a deep camber hyperbolic degree high-precision antenna panel, this high-precision antenna panel is a sandwich, specifically comprises aluminium sheet, two-layer honeycomb core and the built-in fitting that is used to be connected that three layers of prestretching are shaped; Wherein three layers of aluminium sheet are working plate, middle fishplate bar and backboard; Two-layer honeycomb core is first honeycomb core and second honeycomb core, and built-in fitting is connected on the middle fishplate bar with standard screws; This method step is following:

Step (one) is set up the threedimensional model of three layers of aluminium sheet according to bus equation or curve

At the YOZ coordinate system is under the panel designs coordinate system, draws or import the theoretical curve of working plate reflecting surface according to curvilinear equation, is that bus rotates a circle around the Z axle and forms the theoretical curved surface of working plate with this theoretical curve; According to the piecemeal scheme, the theoretical curved surface of working plate is cut apart the theoretical curved surface of formation monolithic working plate; With the theoretical curved surface of monolithic working plate is benchmark along the normal direction 49.5mm that upwards squints; Obtain fishplate bar theoretical curve in the monolithic; With fishplate bar theoretical curve in this monolithic is the theoretical curved surface of bus fishplate bar in the Z axle rotates a circle formation; According to the edge sealing process requirement, be partitioned into the theoretical curved surface of fishplate bar in the monolithic then, and in this monolithic, set up the connecting hole of built-in fitting on the theoretical curved surface of fishplate bar; With monolithic working plate theoretical curve is benchmark along the normal direction 98.5mm that upwards squints, and obtains monolithic backboard theoretical curve, is that bus rotates a circle around the Z axle and forms the theoretical curved surface of backboard with this monolithic backboard theoretical curve; According to the piecemeal scheme, the theoretical curved surface of backboard is cut apart the theoretical curved surface of formation monolithic backboard, and on the theoretical curved surface of monolithic backboard, set up the center index aperture of built-in fitting;

The space geometry of (two) three layers of aluminium sheet of step launches and the location on the nail bed

Minimum point with the theoretical curved surface of monolithic working plate is a basic point, sets up the theoretical tangent plane to a surface of monolithic working plate, on the section, launches the theoretical curved surface of this monolithic working plate afterwards, obtains monolithic working plate spread material; Minimum point with the theoretical curved surface of fishplate bar in the monolithic is a basic point, sets up the theoretical tangent plane to a surface of fishplate bar in the monolithic, on the section, launches the theoretical curved surface of fishplate bar in this monolithic afterwards, obtains fishplate bar spread material in the monolithic; Minimum point with the theoretical curved surface of monolithic backboard is a basic point, sets up the theoretical tangent plane to a surface of monolithic backboard, on the section, launches the theoretical curved surface of this monolithic backboard afterwards, obtains monolithic backboard spread material; With the theoretical tangent plane to a surface of monolithic working plate is datum plane; In the minimum point of the theoretical curved surface of fishplate bar and backboard project on the datum plane; And the distance of the theoretical curved surface minimum point of fishplate bar and the backboard relative working plate of theoretical curved surface minimum point in measuring, the i.e. relative position of three layers of aluminium sheet expansion basic point; Section with the theoretical curved surface minimum point of monolithic working plate is a Sketch Plane, draws the projecting figure of monolithic working plate technological compensa tion face; With the button post of 50mm step pitch array diameter 12mm, and confirm location hole in the nail post position at working plate edge, an end is a circular hole, and the other end is a slotted hole, and circular hole and slotted hole are on same row or same row nail post;

The model of three layers of aluminium sheet of step (three) laser cutting

According to working plate spread material, middle fishplate bar spread material and the backboard spread material of band location hole, the model and the laser cutting of drawing three layers of prestretching shaping aluminium sheet respectively;

Three layers of aluminium sheet of step (four) prestretching shaping are also pressed the model cutting

With the theoretical curved surface of monolithic working plate is digital-to-analogue, and entity mould of Milling Process also depicts the theoretical curved surface profile line of working plate on the grinding tool surface; Under new as-quenched, aluminium sheet being carried out prestretching is shaped; On the aluminium sheet that prestretching is shaped, draw center line then, the aluminium sheet that is shaped at the outer margin contour cutting prestretching of delineating on according to the entity mould away from the position of location hole; Aim at the center line of the aluminium sheet that prestretching is shaped to the center line of the model of working plate spread material, and the center line of the aluminium sheet that is shaped along prestretching moves to the outer margin contour place of cutting in advance; Be coated on the model of working plate spread material on the aluminium sheet of prestretching shaping then, draw edge contour and position of positioning hole and cutting and punching have so just obtained the working plate that prestretching is shaped;

Method according to the pull-shaped working plate of cutting; In the model of fishplate bar and backboard be coated on the aluminium sheet that prestretching is shaped; The outer margin contour and the location hole of fishplate bar and backboard in the outer rim of model marks during near the outline line of entity mould, cutting and deburring have just obtained being with the middle fishplate bar of location hole and the prestretching forming board of backboard;

It is high that step (five) is calculated nail

Import to monolithic working plate technological compensa tion face in the high software for calculation of nail; Nail bed size and nail post bulb radius are set; The monolithic working plate technological compensa tion face of setovering afterwards, the direction of biasing are the protruding side of technological compensa tion face, and the distance of biasing is that the thickness of backing plate adds nail post bulb radius; To the sideline of making coordinate plane projection and selecting the high data independent variable of nail to belong to, calculate the high data of the pairing nail of technological compensa tion face then, and the three-dimensional nail of output post Pareto diagram;

The location of (six) three layers of prestretching shaping aluminium sheet of step on high accuracy nail bed

Pull out the nail post of location hole position, change shop bolt into; When panel is made, promptly obtained the layout of three layers of prestretching shaping aluminium sheet on the nail bed to the location hole aligned pin placement of three layers of aluminium sheet of prestretching shaping;

Step (seven) is successively laid sandwich

The described sandwich of successively laying is the main process that deep camber hyperbolic degree high-precision antenna panel is made:

(1) be placed on the nail bed enveloping surface that the high data of nail that calculate according to step (five) mix up a backing plate and the location;

(2) the working plate front is placed on the backing plate that scribbles lubricating oil, utilizes alignment pin and location hole to position;

(3) at the working plate backsizing, first honeycomb core is laid on the glue-line;

(4) will connect then be installed in through standard screws with built-in fitting on the fishplate bar, do not have a side of built-in fitting to coat glue and be layered on first keriotheca at middle fishplate bar and locate;

(5) that face gluing of built-in fitting is arranged at middle fishplate bar, place second honeycomb core;

(6) glue-coated backboard glue is faced down be positioned on second honeycomb core and the location, so far accomplished the process of deployment successively of sandwich;

(7) pass through the vacuum bag elastic membrane sealing at last, vacuumize, after pressure remains on and reached about 0.03Mpa 36 hours, formed deep camber hyperbolic degree high-precision antenna panel.

2. the combined shaping method of deep camber hyperbolic degree high-precision antenna panel according to claim 1; Three layers of aluminium sheet of described deep camber hyperbolic degree high-precision antenna panel are the aluminium sheet that the entity mould prestretching made according to working plate is shaped, and wherein working plate thickness is that 1.5 millimeters, middle fishplate bar thickness are that 1 millimeter, back plate thickness are that the thickness of 1.5 millimeters and honeycomb core is 48 millimeters.

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