Aircraft skin stretching forming equipment

Abstract

The utility model provides an aircraft skin stretching and forming device which aims at the defects of existing devices of the same type, a pressure action mechanism and a clamp assembly are improved and optimized, and a designed pitching mechanism and a multifunctional workbench can execute stretching and jacking fine actions in different directions. By means of the technical scheme, high-quality forming of a novel skin of a complex structure can be achieved easily, the clamp assembly with the wedge-shaped jaw can conduct more accurate clamping force control, blank damage caused by improper force application can be effectively avoided, and therefore the finished product rate and the production efficiency of the skin are both remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of aircraft skin spare part manufacturing technology, specifically relates to a kind of aircraft skin stretch forming equipment. BACKGROUND

[0002] At present, for the important spare part of aircraft skin, the outer surface of fuselage, more advanced metal material stretch forming process has been gradually used in the field to manufacture. When manufacturing, it is specifically through multiple clamps to clamp blank edge, and the clamp is moved by pressure assembly to make blank stretch, and finally target skin finished product is obtained. Some stretch equipment is also provided with jacking assembly, for forming specific surface shape in cooperation with clamp. Since skin has characteristics of large size and weight, small thickness, easy to damage and the like, there are very high requirements for the accuracy of parameters such as clamping force, stretching trajectory and speed in process execution, and the existing such equipment still generally has defects such as unreasonable design of pressure action mechanism, difficult control of clamping force of clamp, etc. Not only limit the improvement of skin yield, but also make production efficiency and capacity unable to meet the needs of rapid development of current new aircraft. SUMMARY

[0003] Therefore, aiming at the technical problems existing in the field, the utility model provides a kind of aircraft skin stretch forming equipment, which is specifically composed of fixed rack, adaptive pitch frame, multifunctional workbench, synchronous stretching assembly and clamp group.

[0004] Among them, fixed rack is fixedly installed at skin manufacturing station, for supporting the whole equipment;

[0005] Adaptive pitch frame is symmetrically arranged at the horizontal two sides of fixed rack, each adaptive pitch frame is pivotably connected with the side below of fixed rack and pivotably connected with the side above of fixed rack by pitch hydraulic cylinder, can pitch swing under the action of pitch hydraulic cylinder;

[0006] Multifunctional workbench is arranged on the upper surface of fixed rack, and is connected with fixed rack through jacking hydraulic cylinder below, for supporting the skin blank to be processed, and jacking skin blank under the action of jacking hydraulic cylinder;

[0007] The synchronous stretching assembly and the clamp group are mounted on the adaptive tilt frame, the synchronous stretching assembly comprises a plurality of stretching hydraulic cylinders, cylinder bodies of the stretching hydraulic cylinders are fixed on the adaptive tilt frame, piston rods of the stretching hydraulic cylinders extend in a direction away from the multifunctional workbench, and end portions of the piston rods are fixedly connected with mounting plates; the clamp group is composed of a plurality of clamps arranged on a clamp mounting seat at one end of the adaptive tilt frame close to the multifunctional workbench, different positions of the clamp mounting seat are connected with the mounting plates through clamping hydraulic cylinders respectively; the clamp jaws of the clamp group can be closed to clamp the edges of the skin blank under the action of the clamping hydraulic cylinders; and the clamp mounting seat can move with the mounting seat and the clamping hydraulic cylinders under the action of the stretching hydraulic cylinders.

[0008] Further, the multifunctional workbench is composed of a plurality of independently movable sub-workbenches, which are used to respectively and independently jacking the skin blank to form a specific skin surface shape.

[0009] Further, the stretching hydraulic cylinders connected with different positions of the clamp mounting seat are arranged in pairs.

[0010] Further, the clamp is composed of a clamp block, a clamp jaw sliding block and a sliding block guide plate; the clamp block is fixedly connected with the clamp mounting seat at a rear end, and has a wedge-shaped clamp jaw at a front end; the sliding block guide plate is arranged on two side walls of the wedge-shaped clamp jaw, and has a guide groove on the sliding block guide plate; one clamp jaw sliding block is arranged on each sliding block guide plate and can slide in the wedge-shaped clamp jaw along the guide groove; the clamp block simultaneously serves as part of the cylinder body of the clamping hydraulic cylinder, the piston rod of the clamping hydraulic cylinder extends in the direction of the wedge-shaped clamp jaw and can drive the clamp jaw sliding block to slide in the wedge-shaped clamp jaw; and the clamp block further has a lubricating oil passage in communication with the piston rod and the sliding block guide plate respectively, which is used to provide lubricating oil to keep the corresponding sliding parts lubricated.

[0011] The aircraft skin stretching forming equipment provided by the utility model can improve the forming quality of the skin and the production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a perspective view of the equipment provided by the utility model;

[0013] Figure 2 It is a side view of the equipment provided by the utility model;

[0014] Figure 3 It is a top view of the equipment provided by the utility model;

[0015] Figure 4 The utility model provides a clamp structure diagram in the equipment provided by the utility model. DETAILED DESCRIPTION

[0016] The technical scheme of the utility model will be described clearly and completely in combination with the drawings, obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without making the creative labor belong to the range of protection of the utility model.

[0017] In the description of the utility model, it needs to be explained that the orientation or position relation indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is the orientation or position relation based on the shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and is not indicated or implied that the indicated device or element must have the specific orientation, the specific orientation construction and operation, therefore, cannot be understood as the limitation of the utility model.

[0018] In the description of the utility model, it needs to be explained that unless another explicit provision and limitation, the terms "installation", "connection", "connect" should be broad sense, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be directly connected, also can be indirectly connected through the intermediate medium, can be the intercommunication of two elements. For the person skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0019] The utility model provides a plane skin stretch forming equipment, as shown in Figures 1-3 Specifically by fixed rack 3, adaptive pitch frame 5, multifunctional workbench 2, synchronous stretching assembly 4 and clamp group 1,

[0020] Among them, the fixed rack 3 is fixedly installed in the skin manufacturing station and is used for supporting the whole equipment,

[0021] The adaptive pitch frame 5 is symmetrically arranged on the horizontal two sides of the fixed rack 3, each adaptive pitch frame 5 is pivotably connected with the side below of the fixed rack 3 through the pitch hydraulic cylinder 7 and is pivotably connected with the side upper of the fixed rack 3 through the pivot 8, can swing under the action of the pitch hydraulic cylinder 9,

[0022] The multifunctional workbench 2 is arranged on the upper surface of the fixed rack 3, and is connected with the fixed rack 3 through the jacking hydraulic cylinder below, is used for supporting the skin blank to be processed, and jacks up the skin blank under the action of the jacking hydraulic cylinder,

[0023] The synchronous stretching assembly 4 and the clamp group 1 are both mounted on the adaptive tilt frame 5, the synchronous stretching assembly 4 comprises a plurality of stretching hydraulic cylinders 9, the cylinder body of the stretching hydraulic cylinder 9 is fixed on the adaptive tilt frame, the piston rod extends in the direction away from the multifunctional workbench 2, and the end thereof is fixedly connected with a mounting plate; the clamp group 1 is composed of a plurality of clamps 6 arranged on the clamp mounting seat of the adaptive tilt frame 5 close to one end of the multifunctional workbench 2, the clamp mounting seat is connected with the mounting plate through clamping hydraulic cylinders at different positions; the clamp opening of the clamp group can be closed to clamp the edge of the skin blank under the action of the clamping hydraulic cylinder; the clamp mounting seat can move with the mounting seat and the clamping hydraulic cylinder under the action of the stretching hydraulic cylinder 9, so that the corresponding stretching action can be performed in the case that the clamp clamps the blank.

[0024] In a preferred embodiment of the present application, the multifunctional workbench 2 is composed of a plurality of independently movable sub-benches for respectively supporting and jacking up the skin blank to form a specific skin surface shape.

[0025] In a preferred embodiment of the present application, the stretching hydraulic cylinders 9 connected at different positions of the clamp mounting seat are arranged in pairs on both sides of the clamping hydraulic cylinder.

[0026] In a preferred embodiment of the present application, as shown in Figure 4 The clamp 6 is specifically composed of a clamp block 10, a clamp opening sliding block 11 and a sliding block guide plate 12; wherein the clamp block 10 is fixedly connected with the clamp mounting seat at the rear end, and has a wedge-shaped clamp opening 13 at the front end; the sliding block guide plate 12 is arranged on the two side walls of the wedge-shaped clamp opening 13, and has a guide groove on the sliding block guide plate 12; one clamp opening sliding block 11 is arranged on each sliding block guide plate 12, and can slide in the wedge-shaped clamp opening 13 along the guide groove; the clamp block 6 simultaneously serves as part of the cylinder body of the clamping hydraulic cylinder, the piston rod of the clamping hydraulic cylinder extends towards the wedge-shaped clamp opening 13, drives the clamp opening sliding block 11 to slide in the wedge-shaped clamp opening 13, and the clamp opening sliding blocks 11 move away from each other while sliding towards the clamp opening, so as to gradually clamp the skin blank, and the clamp opening sliding blocks 11 move away from the clamp opening to separate from each other; the clamp block 6 further has a lubricating oil passage 14 in communication with the piston rod and the sliding block guide plate respectively, for providing lubricating oil to maintain the lubrication of the corresponding sliding parts.

[0027] It should be understood that the size of the serial number of each step in the embodiments of the present application does not mean the execution order, and the execution order of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0028] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An aircraft skin stretch forming apparatus, characterized by: Specifically comprises a fixed rack, an adaptive tilt rack, a multifunctional workbench, a synchronous stretching assembly and a clamp group; The fixed rack is fixedly installed at a skin manufacturing station and is used for supporting the entire device; The adaptive tilt racks are symmetrically arranged at the horizontal two sides of the fixed rack, each adaptive tilt rack is pivotably connected to the lower side of the fixed rack and the upper side of the fixed rack through a tilt hydraulic cylinder, and can pivotally swing under the action of the tilt hydraulic cylinder; The multifunctional workbench is arranged on the upper surface of the fixed rack, and is connected to the fixed rack through a jacking hydraulic cylinder below, and is used for supporting a skin blank to be processed and jacking the skin blank under the action of the jacking hydraulic cylinder; The synchronous stretching assembly and the clamp group are both installed on the adaptive tilt rack, the synchronous stretching assembly comprises a plurality of stretching hydraulic cylinders, the cylinder body of the stretching hydraulic cylinder is fixed on the adaptive tilt rack, the piston rod thereof extends away from the multifunctional workbench, and the end thereof is fixedly connected with a mounting plate; the clamp group is composed of a plurality of clamps arranged on a clamp mounting seat close to the multifunctional workbench, different positions of the clamp mounting seat are connected with the mounting plate through clamping hydraulic cylinders; the clamp opening of the clamp group can be closed to clamp the edge of the skin blank under the action of the clamping hydraulic cylinder; the clamp mounting seat can move with the mounting seat and the clamping hydraulic cylinder under the action of the stretching hydraulic cylinder.

2. The aircraft skin stretch forming apparatus of claim 1, wherein: The multifunctional workbench is composed of a plurality of independently movable sub-workbenches, which are used for respectively and independently jacking the skin blank to form the surface shape of the skin.

3. The aircraft skin stretch forming apparatus of claim 1, wherein: The stretching hydraulic cylinders connected to different positions of the clamp mounting seat are arranged in pairs.

4. The aircraft skin stretch forming apparatus of claim 1, wherein: The clamp is composed of a clamp block, a clamp opening sliding block and a sliding block guide plate; the rear end of the clamp block is fixedly connected with the clamp mounting seat, and the front end has a wedge-shaped clamp opening; the sliding block guide plate is arranged on the two side walls of the wedge-shaped clamp opening, and has a guide groove on the sliding block guide plate; one clamp opening sliding block is arranged on each sliding block guide plate and can slide in the wedge-shaped clamp opening along the guide groove; the clamp block simultaneously serves as part of the cylinder body of the clamping hydraulic cylinder, the piston rod of the clamping hydraulic cylinder extends towards the wedge-shaped clamp opening and can drive the clamp opening sliding block to slide in the wedge-shaped clamp opening; the clamp block further has a lubricating oil passage in communication with the piston rod and the sliding block guide plate, which is used for supplying lubricating oil to keep the lubrication of each sliding part.

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