Universal automated system for forming large sheet parts (wow!), and how to configure its surface

 

(57) Abstract:

The invention relates to equipment for obtain-recliner presses used in the formation of large parts in the form of shells double or alternating curvature of the sheet metal, layered metal composites, and can be used in aerospace and other industries. Universal automated install (WOW) contains two arrays of oppositely located support with pneumatic actuator and a hydraulic locking, interchangeable shells made of composite materials and the system stops with the CNC axes are aligned with the supports matrices. The way to configure WOW is consistent installation and fixation of transverse rows of supports the bottom of the matrix using a beam with supports CNC installation and fixation on the supports first shell upper matrix, mounting her from the top of the matrix, and then install the lower shell matrix with basing it on the base holes and the working surface is already installed shell upper matrix. Technical result achieved is to ensure the shaping parts with precision while reducing strateskom equipment for obtain-recliner presses, used in the formation of large parts of double curvature, and alternating with the local pagetime sheet metal, álora, and can be used in aerospace, shipbuilding, construction, chemical, automotive and other industries for the manufacture of obvoiously parts of the production facilities.

Forming obvoiously parts is plastic deformation of metal and metal composite sheet tight with tension, anchored in the jaws of the press, between the working surfaces of the forming punch and the corresponding clamp or on the surface of the forming punch. For example, for the manufacture of one of the aircraft used by a large number obvoiously parts with complex shapes and dimensions in the plan. Generally, for each obvoiously parts will need one set of working tooling consisting of special pulling the plug and clamp. Special equipment is either solid, or hollow structure with a working surface, the corresponding geometrical parameters obvoiously details.

Famous universal design is a snap of polymeric materials.- M: Machinery, 1979, 104 S.).

Adaptive system supports universal mounting punch (medium sized) designed for installation of rigid fiberglass shells with different geometrical parameters, which in this design simultaneously perform the functions of programmetically to install rod bearings in height.

The convex dual of the curvature of the fiberglass shell is working surfaces that come into contact with the shaping sheet.

However, the change of the geometrical parameters of the working surface as a result of deformation when configuring shell with large dimensions in the plan can be significant. The nature of these deformations is "spin" cross-sections of the shell relative to the longitudinal axis, resulting in a known design of the universal mounting of the punch is of limited use on its accuracy characteristics and can be used for installation of replacement shells of small dimensions (up to 2.5 x 1.5 m).

A known method of manufacturing a pulling of punches on the author's certificate USSR N 477771, consisting in the installation of the molding shells on the adjustable support elements, p is the oneness of their applications (geometry details) and the use of relatively rigid molding shells-programmetically.

Also known U.S. patent N 4212188, 1980, owned by the company "Boeing" by George T. Pinson (Georgy T. Pinson), "device for forming sheet metal". The device comprises two oppositely located to each other array of supporting elements in the form of plungers with thread. The plungers are movable individually and located so that their tip set the desired surface configuration. Plungers equipped with individual motors and pivoting heads for spherical hinges. The surface of the heads of the plungers treated and covered with a continuous flexible sheet so as to provide higher precision formed parts. In the head-mounted switches for motor control plungers. For forming sheet stock, it is placed between the configured surfaces of the plungers and is compressed, as by stamping.

U.S. patent N 4212188 chosen as a prototype. The disadvantages of this solution is the inability to achieve a desired high surface quality and form accuracy obvoiously parts and excessive cost of such construction. As noted above, the dimensions of obvoiously parts, already widely used, SOS the hoist dimensions of 18 x 3.5 m and more. In this case, the number of plungers when the spacing of 200 mm will be 3240 PCs and the same number of controllable motors.

Existing control systems in machine tools allow you to control simultaneously for 5-10 channels. It can be assumed that even with very high reliability of each element of the hypothetical system management, system reliability will be low, and the cost is extraordinary high.

The design of the facility for U.S. patent has other disadvantages, each of which makes it difficult or even eliminates the possibility of the implementation of the proposed solution for forming sheet obvoiously parts of the airframe method of lining with stretch for special stretching-card-mounting presses.

The technical problem of the invention is to provide a shaping parts with precision and surface quality and simplifying the design of the facility.

Universal automated install (WOW), containing two arrays of oppositely spaced supports, combined in a matrix, with appropriate supports in opposite coaxial matrices, movable along its axis with papathanassiou installation for shaping, has a block-sectional design, the lower matrix in the cross-section is T-shaped, and the upper U-shaped, and on the bottom of the matrix located on the sides rails with movable racks and head plate carrying a series of pins vertically moving the stops with computer numerical control (CNC), coaxially with the supports matrices, which are pneumatic and hydraulic fixation rod supports.

For the same purpose pin stops CNC installed by the program so that their tip ask discretely line cross-sections of the working surface in places coaxially arranged series supports the bottom of the matrix, then the supports of this section up to contact with the lugs of the bar and fixed in this position, and so - on each transverse row of supports the bottom of the matrix, after which the yoke is removed, and the thrust bearings fit the working surface of the upper shell matrix based on two core holes in the shell, and then to the outside surface of the shell are brought support the upper matrix, connect with her and fixed; top matrix with the installed shell rises, and supports the bottom of the matrix is lowered to its original state two base holes and fixed, then the upper matrix is lowered into the lower position and support the lower matrix raised to contact with the outside surface of the shell, fixed and fixed with the shell.

For the same purpose, the algorithm calculate the coordinates Z stops traverse takes into account the actual point of contact of the spherical surface of the thrust bearing with theoretical surface obvoiously details.

Significant differences between the proposed structures and method known in science and technology related to WOW, substantiated by a combination of interacting limited number of stops CNC and a large array of supports with pneumatic actuator and the hydraulic detent that allows at minimum cost to produce accurate installation in three-dimensional space environments - working surfaces for shaping parts of the airframe.

Significant differences in the way the settings are in a certain sequence of operations with five objects: crossmember with supports that are controlled by the CNC, the lower and upper matrices with an array of oppositely spaced supports, a set of two interconnected shells - working surfaces formoobrazovanii tonalities WOW; in Fig. 2 is a view of the bottom of the matrix WOW with shell and traverse stops.

Universal automated installation (longitudinal section in Fig. 1) for forming large sheet parts of the airframe (WOW) consists of a bottom 1 and top 2 matrices with the supports 3, installed and fixed on tables 4, 5 stretching-card-mounting press. Matrix exhibited in such a way that ensures alignment of all supports. Bearing 3 is a pneumatic cylinder with a rod on the end of which is fixed to the cylinder 6, having the form of a mushroom cloud with a spherical surface. The support rod is moved in the opening latch 7 of the hydraulic type, which is a guide for the rod bearings. On the heads of the supports of the lower matrix is a convex rigid shell 8 made, for example, from a polymer composite material. Geometrical parameters of the convex working surface of this shell represents a surface of double curvature and correspond forming. Accuracy requirements form the working surface, its purity (as opposed to outside the surface) is very high. Shell manufactured by the method of contact formation in special forms.

On the heads and on the supports 9 of the lower matrix, two heads are pins 10, and the shell - base hole. When installing the shell 8 are two technological pin 11. For fastening of membranes on supports some of them are electromagnetic tacks. In Fig. 2 shows a view of the bottom of the matrix WOW with the shell 9 and the yoke 12 is secured in position on the lugs 13 CNC. The axis stops coaxial axes of the supports 3. The rods 14 are nominated by the sequence program. Yoke 12 is secured on the uprights 15 and moves along a WOW on rails 16. The architecture of the bottom 1 and top 2 matrices is that they, depending on the length of the workpiece, may be drawn from the required number of blocks of supports, each of which consists of sections 17, interconnected and which has an Autonomous control system with remote manual control 18. Section matrices represent the power frame with transverse row of poles, the shape of the bottom sections of the matrix has a T-shape, in which the progress of the Central pillars more, and the shape of the upper section of the matrix is U-shaped with a large stroke of the supports at the edges.

Universal automated installation operates as follows. On the table stretching-card-mounting press to set the required share of emyh shells 8, 9. The blocks are drawn together and joined together docking device, providing the necessary accuracy of the database and the connection control systems of the supports 3. On the rails 16 are mounted rack 15, which is fixed on the estimated height of the traverse 12. The axis of the lugs 13 are placed on the axes of the supports 3 of the first section. Enables automatic configuration in which the lugs 13 for a given program are installed so that their tip ask discretely working surface in places coaxially located number of poles 3 of the lower matrix 1, then these supports are raised to contact with the rods 14 stops 13 and are automatically fixed in this position by the hydraulic clamps 7 rod bearings. Traverse stops automatically moves to the step (between the axes of the supports), and the configuration process supports repeats. After you configure all the supports yoke is removed from the working area, and head bearings to fit the working surface of the upper shell matrix based on two core holes 10 in the shell. Then to the outside surface of the shell are fed pneumatic support the upper matrix, connect it up to full contact, fixed hydraulic clamps 7 and the shell in this position, the sheath 9 is raised, and support the lower matrix 2 are lowered to the original position. To set the shell 9 is supplied return envelope 8 - working surface of the lower matrix is based with the help of technological pins 11 on the two base holes and fixed. The upper matrix 2 is lowered into the lower position and support the lower matrix 1 raised to contact with the outside surface of the shell, the fixed hydraulic clamps 7 and fixed with the casing 8.

In the program for the CNC installation stops 14 takes into account the actual point of contact of the spherical surface of the head 6 with theoretical surface obvoiously details.

After setting the working surfaces WOW matrix divorce in extreme positions and between them is placed a sheet workpiece 19, the ends of which are clamped in the jaws of the press 20. Applied tensile forces Q and compressive efforts P.

The advantage of the proposed design of WOW and how it is setup before the prototype is a significant simplification of the structure and reducing its cost. Management 15. . .20 stops traverse at the same time does not cause great difficulties for the modern level of development of management systems. Configuring WOW ASS="ptx2">

Accuracy of possibilities WOW considering forming obvoiously details on universal forming punch similar design in terms of production enable us to draw conclusions with undoubted advantages in comparison with the prototype.

1. Universal automated system for forming large obvoiously and other sheet parts containing two oppositely-set matrix, each of which has rows corresponding to each other and arranged along a common axis to move along it and fixing support with the heads and secured to them the appropriate formoobrazovanii details shell with the formation of the working surface installation for shaping, wherein the matrix is made in the form of block-sectional design, the cross section of the upper matrix is U-shaped, and the lower T-shaped, the lower matrix is made attached to its lateral surfaces of the guide and installed with the ability to navigate head plate carrying a series of vertically movable stops with computer numerical control (CNC), installed coaxially with TNA is replicastore type.

2. A method of configuring a universal automated installation, including installation of supports matrix program, characterized in that to install supports according to the program using the set can be moved along the guides of the lower matrix yoke, bearing chocks, CNC, which set the program so that their tip asked discrete line cross-sections of the working surface in places coaxially arranged series supports the bottom of the matrix, then support this section raised to contact with the lugs of the bar and fixed in this position, the above operation is repeated for each transverse row of supports the bottom of the matrix, after which the yoke is removed, the head stack supports the work surface membrane of the upper matrix based on two core holes in the shell, then to the outside surface of the shell down the supports of the upper matrix, connect with it and fix, raise the top matrix with the shell, and supports the bottom of the matrix is lowered to its original position, to set the shell down the response of the lower shell matrix, base them on two core holes and fixed, then the upper matrix is lowered to the lower position and support the lower matrices under item 2, characterized in that the installation stops beam, defining a working surface, take into account the actual point of contact of the spherical surface of the head support with theoretical surface obvoiously details.

 

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