Part curved surface sizing tool

Abstract

The utility model belongs to the technical field of aviation assembly, and relates to a part curved surface shape correcting tool which comprises a support, a base and a rod-shaped cushion block, the support is provided with a groove in any edge according to the angle and height size of a T-shaped profile, sawteeth are arranged on the surface of the base, the rod-shaped cushion block is movably arranged on the sawteeth, and the rod-shaped cushion block is arranged on the base. By using the shape correcting device provided by the utility model, a large-angle special-shaped T-shaped profile can be vertically stressed at three points on a vertical plane, namely, the support and the part as well as the part and the two rod-shaped cushion blocks are vertically stressed, and a manual operation platform is replaced by a hydraulic machine; and the adverse effects of large change of the angle of the part, surface pits, excessive thinning amount of the part and the like caused by manual shape correction of a metal plate worker are corrected. The phenomenon that the parts are in excessive contact with tools and are wrinkled is reduced, the repeated shape correcting time of sheet metal workers can be saved by 80%, the labor intensity of operators is reduced, the percent of pass of the parts is increased to 99% from 90%, and the machining efficiency of the parts is improved by 92%.

Description

Technical Field

[0001] The utility model belongs to the technical field of aviation assembly, and relates to a part curved surface shape correction tooling. Background Art

[0002] At present, large-curvature bent profile parts are mainly formed by a profile stretch-bending machine. As Figure 1 shown, during the stretch-bending process, there are two types of deformations in the process of the part material being affected by the deformation force, namely elastic deformation and plastic deformation. When the tensile force during stretch-bending first reaches the point where the positions of the atoms inside the material change, when the tensile force is removed, the atoms of the material return to their original equilibrium positions, and the material returns to its original shape and size. The material undergoes elastic deformation, and the shape of the part does not reach the required shape. When the tensile force increases and causes the atoms of the material to deviate from their original equilibrium positions and reach adjacent stable equilibrium positions, when the tensile force is removed, the atoms no longer return to their original positions but stop at their adjacent stable equilibrium positions, and the material becomes irrecoverable permanent deformation, that is, it reaches plastic deformation.

[0003] As Figure 1 shown, when the profile part is stretch-bent closely against the stretch-bending die, at both ends of the part, that is, the C region position in Figure 1 , under the action of the deformation force, the stress state inside the material cross-section has been changed and plastic deformation has been achieved. In the middle part of the part, such as the B region position in Figure 1 , due to the dispersion of the force, the stress inside the cross-section has not been eliminated, and the material is in the elastic deformation stage. After springback, there is a deviation between the outer shape of the part and the designed required outer shape. This requires the sheet metal worker to manually correct the outer shape of the part after the stretch-bending forming. However, due to the specification factors of the part itself, the included angle of the material is not 90°. Repeated manual correction will inevitably affect the unique included angle of the part. It affects the surface quality of the part, is prone to surface scratches and pits. Even wrinkling deformation occurs, and the thinning amount of the part is also easily beyond the specified allowable range. It is very easy to cause waste products and affect the quality of the part. Content of the Utility Model

[0004] The purpose of the utility model: In order to solve the above technical problems, the utility model uses the shape and size of the special-shaped T-profile material and combines the characteristics of the part outer shape to propose a special-shaped T-profile part curved surface shape correction tooling that can meet different angles and different material thicknesses.

[0005] Technical Solution:

[0006] A part surface calibration tooling, which is used for calibrating the surface of T-shaped profile parts, includes a bracket, a base and a rod-shaped cushion block. The bracket is rectangular, and a slot is opened on any one of the side edges of the rectangular bracket according to the angle and height dimensions of the T-shaped profile. The slot is adapted to the size of the T-shaped profile part. The surface of the base is provided with sawteeth, and the rod-shaped cushion block is movably arranged on the sawteeth. The upper surface of the rod-shaped gasket is in contact with the lower surface of the T-shaped profile part.

[0007] Further, the slot on the side edge of the bracket is 90°.

[0008] Further, the slot on the side edge of the bracket is 100°.

[0009] Further, the slot on the side edge of the bracket is 109°.

[0010] Further, the slot on the side edge of the bracket is 112°.

[0011] Further, the bracket is of a rectangular or square structure, and the thickness dimension δ is 20-25 mm.

[0012] Further, the bracket, the base and the rod-shaped cushion block are all made of aluminum.

[0013] Beneficial effects:

[0014] By using the calibration device provided by the present utility model, large-angle special-shaped T-shaped profiles can be vertically stressed at three points on the vertical plane, that is, vertically stressed between the bracket and the part, and between the part and the two rod-shaped cushion blocks. By using a hydraulic press to replace the manual operation platform, the adverse effects caused by manual calibration by sheet metal workers, such as large changes in part angles, surface pits, and excessive thinning of parts, are corrected. Reducing the excessive contact between parts and tools and the phenomenon of part wrinkling can save 80% of the repeated calibration time of sheet metal workers, reduce the labor intensity of operators, increase the part qualification rate from 90% to 99%, and increase the part processing efficiency by 92%. Description of the drawings

[0015] Figure 1 It is a schematic diagram of a special-shaped T-shaped profile part;

[0016] Figure 2 is Figure 1 A sectional view taken along the A-A direction;

[0017] Figure 3 Schematic diagram of the bracket structure in the present utility model;

[0018] Figure 4 Schematic diagram of the combined installation structure of the base and the rod-shaped cushion block in the present utility model;

[0019] Figure 5 It is a schematic diagram of the combined installation of a special-shaped T-shaped profile part and the bracket

[0020] Figure 6 Schematic diagram of the installation of the special-shaped T-section part in cooperation with the shape correction device;

[0021] Wherein: 1 - base, 2 - rod-shaped cushion block, 3 - T-section, 4 - bracket, 5 - hydraulic press. Specific implementation manner

[0022] The following further introduces the present utility model in conjunction with the attached drawings. As Figures 1-6 shown, a part curved surface shape correction tooling includes a bracket, a base and a rod-shaped cushion block. The bracket is grooved on any one side according to the angle and height dimensions of the T-section, and the grooving position is near the center position of the side. The surface of the base is provided with sawteeth, and the rod-shaped cushion block is movably arranged on the sawteeth.

[0023] In this embodiment, according to parts of different shapes, the grooves on the side of the bracket can be set to 90°, 100°, 109° or 112°, or the grooves of these four angles are opened on the same bracket to increase its versatility and reduce the manufacturing cost.

[0024] The bracket is of a rectangular or square structure, and the thickness dimension δ is 20 - 25 mm.

[0025] In this embodiment, the bracket, the base and the rod-shaped cushion block are all made of aluminum, having good mechanical strength, light weight and low cost.

[0026] When the device is used, the base needs to be padded under the part, and the rod-shaped cushion block is installed on the base.

[0027] The support structure is rectangular, and the material is selected to be harder than the material of the part. The length dimension of the base should be slightly smaller than the minimum value of the length dimension of the clamp of the selected hydraulic press. The contact surface between the device and the cushion block is serrated for fixing the rod-shaped cushion block to prevent sliding. The rod-shaped cushion block is a cylindrical shape with a diameter of 30 mm, and the material is the same as that of the base.

[0028] The present device is a device capable of correcting T-shaped section parts with different angles and different material thicknesses.

[0029] Usage method:

[0030] Step 1: Place the rod-shaped cushion block 2 stably on the base 1;

[0031] Step 2: Place the T-section 3 on the rod-shaped cushion block 2, and ensure that Figure 1 as shown in the B area is between the two rod-shaped cushion blocks 2, and there is no contact between the B area and the base, so that the part to be processed is suspended;

[0032] Step 3: Clamp the bracket 4 on the part to be processed on the T-section 3;

[0033] Step 4: Start the hydraulic press 5 to make the hydraulic press 5 act above the bracket 4 to complete the calibration of one point.

[0034] Step 5: Release the hydraulic press.

[0035] Step 6: Move the T-shaped section 3 and the bracket 4 simultaneously, and then the operation in Step 4 can be repeated until the calibration of area B is completed. Then, use the same method to calibrate area C.

[0036] Step 7: Shut down the hydraulic press, and remove the bracket 4 and the T-shaped section 3 in sequence to complete the machining of the part.

[0037] The utility model designs a device for calibrating special-shaped T-shaped sections that can meet different angles and different material thicknesses by using the shape and size of the material and combining the characteristics of the part's outer shape.

[0038] Before pressing, make point D (such as Figure 3 ) in the bracket be at the same position as the force application point of the T-shaped section 3, and at the same time, make the device and the T-shaped section 3 closely combined to ensure that the force can act accurately on the calibration point during the pressing process. According to area B of the T-shaped section 3, by moving the device corresponding to the calibration points of the T-shaped section 3 and using the hydraulic press to apply pressure point by point, the calibration of area B of the T-shaped section 3 is completed, and finally the calibration of area C is completed.

Claims

1. A part surface calibration tooling, which is used for calibrating the surface of T-shaped section parts, is characterized in that It includes a bracket, a base and a rod-shaped cushion block. The bracket is rectangular. A slot is opened on any one of the side edges of the rectangular bracket according to the angle and height dimensions of the T-shaped profile. The slot is adapted to the dimensions of the T-shaped profile part. Sawteeth are provided on the surface of the base. The rod-shaped cushion block is movably arranged on the sawteeth, and the upper surface of the rod-shaped gasket contacts the lower surface of the T-shaped profile part.

2. The part curved surface calibration tooling according to claim 1, characterized in that, The slot on the side edge of the bracket is 90°.

3. A part surface calibration tooling according to claim 1, characterized in that The slot on the side edge of the bracket is 100°.

4. A part curved surface calibration tooling according to claim 1, characterized in that, The slot on the side edge of the bracket is 109°.

5. A part curved surface calibration tooling according to claim 1, characterized in that, The slot on the side edge of the bracket is 112°.

6. The surface calibration tooling for parts according to claim 1, characterized in that, The bracket is of rectangular or square structure, and the thickness dimension δ is 20 - 25 mm.

7. A part curved surface shape correction tooling according to claim 1, characterized in that, The bracket, the base and the rod-shaped cushion block are all made of aluminum.

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