Adjustable skin fixing device

Abstract

The invention relates to a skin drilling fixing device, and belongs to the technical field of sheet metal forming specialty. An adjustable skin fixing device comprises an L-shaped positioning block and further comprises adjusting devices installed on two side arms of the positioning block respectively, the adjusting devices can move relative to the side arms, and the moving direction of the adjusting devices is perpendicular to the length direction of the side arms. When the skin is placed on the inspection mold, the adjusting device is moved according to the size of the skin, so that the end part of the adjusting device abuts against the edge of the skin; the number of the skin fixing devices is at least two, and the skin fixing devices are oppositely fixed to the opposite corners of the inspection die. Compared with the prior art, the device has the following advantages that the device enables a skin part positioning hole to meet the assembly and installation requirements, the part can be adjusted in place generally within 1-2 hours when a skin is installed through the positioning hole, the labor cost is greatly reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to a skin drilling and fixing device, belonging to the technical field of sheet metal forming. Background Art

[0002] In the current aviation field, in order to meet the requirements of assembly speed, it is necessary to open assembly positioning holes on parts, especially skin parts. The positioning hole position accuracy requirement is high (no more than 0.3mm), so the positioning hole can only be opened in the final state of the part. Figure 1 As shown, the generally adopted method is to add a drilling template to the final inspection mold. The surface finish of the inspection mold is generally Ra0.8. The parts are very easy to move when drilling, resulting in hole position deviation. For general small-sized skins, the parts can be fixed by manual or clamping methods when drilling; however, the inspection mold for large skin parts has a large size, and it is difficult to fix the sliding parts. If a general fixed positioning block is used, it is difficult to fix the skin with a fixed positioning block due to the tolerance of the part shape, which is usually ±0.8mm, and it is easy to cause the drilling hole position to exceed the tolerance; in addition, if the original method is used for drilling, the part hole position deviation occurs, and the positioning of the positioning hole can only be abandoned when assembling and installing the skin. The part shape is ensured by manually adjusting the alignment edge and laser measurement, which usually takes 2 days and is extremely inefficient. Summary of the invention

[0003] The purpose of the present invention is to provide an adjustable skin fixing device to solve the problem of hole position deviation caused by sliding when drilling holes in large skin parts.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an adjustable skin fixing device, including an L-shaped positioning block, and also including adjustment devices respectively installed on the two side arms of the positioning block, the adjustment device can move relative to the side arm, and its moving direction is perpendicular to the length direction of the side arm; when the skin is placed on the inspection mold, according to the size of the skin, the adjustment device is moved so that its end abuts against the edge of the skin; the number of the skin fixing devices is at least two, and they are relatively fixed at the diagonals of the inspection mold.

[0005] Furthermore, the fixed skin device also includes a top block, one end face of the top block is movably connected to the adjustment device, and the end face away from the adjustment device is a free end; the top block can move synchronously with the movement of the adjustment device; when moved into place, the end face away from the adjustment device rests against the edge of the skin.

[0006] Preferably, a groove is provided on the end surface of the top block connected to the adjusting device, and the groove is adapted to the guide parts respectively arranged on the two side arms.

[0007] Furthermore, a blind hole is provided in the top block, the blind hole is axially consistent with the groove, and the opening end thereof is oriented in the same direction as the opening end of the groove; the end of the adjustment device is adapted to the blind hole.

[0008] Preferably, the upper and lower surfaces of the guide portion are respectively flush with the upper and lower surfaces of the positioning block side arm, one side surface is flush with the free end surface of the side arm, and the other side surface is perpendicular to the side arm, and the end away from the positioning block side arm is the free end.

[0009] Preferably, the adjustment device is an adjustment screw, which is adapted to threaded holes provided on the two side arms of the positioning block; the axial direction of the threaded hole is perpendicular to the length direction of the side arm.

[0010] Preferably, the threaded hole is close to the free end of the side arm.

[0011] Preferably, the number of the fixed skin devices is four.

[0012] Compared with the prior art, the present invention has the following advantages: the device enables the positioning holes of the skin parts to meet the assembly and installation requirements, and the parts can usually be adjusted into place within 1-2 hours by installing the skin using the positioning holes, which greatly reduces labor costs and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the background technology structure of the present invention; Figure 2 is a schematic diagram of the positioning block structure in an embodiment of the present invention; Figure 3 2 is a schematic diagram of the top block structure in an embodiment of the present invention; Figure 4 It is a schematic diagram of the assembly structure of an embodiment of the present invention; Figure 2-4 Among them, 1. positioning block; 2. threaded hole; 3. pin hole; 4. guide part; 5. top block; 6. groove; 7. blind hole; 8. adjustment screw. DETAILED DESCRIPTION

[0014] The following is combined with Figure 2-3 The present invention is further described in detail: an adjustable skin fixing device comprises a positioning block 1, a top block 5 and an adjusting screw 8; Figure 2 As shown, the main body of the positioning block 1 is L-shaped, and pin holes 3 are respectively provided on the two side arms near the corner position, and the adjustable fixed skin device is fixed to the inspection mold by matching pins. In this embodiment, the number of adjustable fixed skin devices is four, and their fixed positions are located at the four corners of the skin and are opposite to each other; threaded holes 2 are provided at the ends of the two side arms near the main body of the positioning block 1, and the axial direction of the threaded hole 2 is perpendicular to the axial direction of the pin hole 3, and the adjusting screw 8 is matched with the threaded hole 2.

[0015] Positioning block structure Figure 2As shown, a guide portion 4 is provided at the end of the positioning block. The guide portion is a regular geometric structure, and its upper and lower surfaces are respectively flush with the upper and lower surfaces of the positioning block side arm, one side surface is flush with the free end surface of the side arm, and the other side surface is perpendicular to the side arm, and the end away from the positioning block side arm is a free end. In this embodiment, the threaded hole 2 passes through the positioning block body and the guide portion 4, and is used for the adjustment screw 8 to pass through.

[0016] The top block structure is as follows Figure 3 As shown, a groove 6 is provided on one end face of the top block 5, and the groove 6 is matched with the guide parts 4 respectively arranged on the two side arms; as a preferred implementation mode of this embodiment, a blind hole 7 is provided in the top block 5, which is used for adjusting the position of the top block 5 with an adjusting screw 8, the blind hole 7 is axially consistent with the groove 6, and its open end is oriented in the same direction as the open end of the groove; the end of the adjusting screw 8 is matched with the blind hole; the top block 5 can move synchronously with the movement of the adjusting screw 8; when it moves into place, its end face away from the adjusting screw 8 abuts against the edge of the skin.

[0017] like Figure 4 As shown, the method of using the adjustable fixed skin device is as follows: 1) Align the edge of the skin with the edge line of the part on the inspection mold and adjust it until all four sides meet the tolerance requirements; 2) Installation of the fixing device: Unscrew the adjusting screw 8 outward to ensure that the top block 5 fits the positioning block 1, and then pass the adjusting screw 8 to the bottom of the blind hole of the top block. After completion, fix the four adjusted skin fixing devices to the four corners of the inspection mold through the pin holes 3, so that the top block is close to the skin parts; 3) Adjust screw 8 to move the top block, and the top block presses against the edge of the skin (be careful not to move the skin. If the skin moves, readjust the skin so that its edge is aligned with the engraved line). After adjusting the top block of the first fixture, adjust the top block of the opposite fixture to press against the skin in the opposite direction. Similarly, make the eight top blocks of the four fixtures completely press against the skin so that it cannot slide against the inspection mold; 4) After the skin is fixed, install the drilling template of the inspection mold and drill the skin installation positioning holes.

[0018] The above embodiments are only preferred implementations of the present invention and do not constitute a limitation of the present invention. Any extensions and modifications made by ordinary technicians in this field without departing from the principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An adjustable skin fixing device, comprising an L-shaped positioning block, characterized in that: It also includes adjustment devices respectively installed on the two side arms of the positioning block, which can move relative to the side arms, and the moving direction is perpendicular to the length direction of the side arms; when the skin is placed on the inspection mold, the adjustment device is moved according to the size of the skin so that its end abuts against the edge of the skin; the number of the skin fixing devices is at least two, which are relatively fixed at the diagonals of the inspection mold.

2. The adjustable fixed skin device according to claim 1, characterized in that: The fixed skin device also includes a top block, one end face of which is movably connected to the adjustment device, and the end face away from the adjustment device is a free end; the top block can move synchronously with the movement of the adjustment device; when moved into place, the end face away from the adjustment device rests against the edge of the skin.

3. The adjustable fixed skin device according to claim 2, characterized in that: The end surface of the top block connected with the adjusting device is provided with a groove, and the groove is adapted to the guide parts respectively arranged on the two side arms.

4. The adjustable fixed skin device according to claim 3, characterized in that: A blind hole is provided in the top block. The blind hole is axially consistent with the groove, and the opening end thereof is oriented in the same direction as the opening end of the groove. The end of the adjusting device is matched with the blind hole.

5. The adjustable fixed skin device according to claim 3, characterized in that: The upper and lower surfaces of the guide part are respectively flush with the upper and lower surfaces of the positioning block side arm, one side surface is flush with the free end surface of the side arm, and the other side surface is perpendicular to the side arm, and the end away from the positioning block side arm is the free end.

6. The adjustable fixing skin device according to any one of claims 1 to 5, characterized in that: The adjusting device is an adjusting screw, which is matched with the threaded holes opened on the two side arms of the positioning block; the axial direction of the threaded hole is perpendicular to the length direction of the side arm.

7. The adjustable fixed skin device according to claim 6, characterized in that: The threaded hole is adjacent to the free end of the side arm.

8. The adjustable fixed skin device according to claim 1, characterized in that: The number of the fixed skin devices is four.

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