The principle of this method is to make a special shaping plug and perform shaping by pulling and expanding, so as to achieve the positioning and shaping effect. The working process is to adjust the size of the shaping plug according to the required shaping amount, insert it into the hollow profile that needs shaping, then place the hollow profile on the shaping platform and fix the profile, and use traction equipment to pull the shaping plug to make the plug Shaping is done by passing through the hollow profile. The paper is illustrated schematically. The schematic diagram of plastic surgery is shown in (Figure 1).

The working principle of the plug head is to drive the trapezoidal adjustment slider to move by rotating the adjustment screw, driving the upper slider and lower slider to expand and contract. The upper slider and lower slider are respectively combined with the internal cavity of the profile to be shaped. , adjust the required expansion amount, and then tighten the fixing nut to finalize the shape. In this way, the upper slider and the lower slider will open up the sunken aluminum profile surface through the profile cavity.

Design a special plug according to the shape of the profile that needs to be reshaped. When designing the plug, consider similar models and versatility issues. It is determined to design an adjustable plug to increase the number of plugs suitable for more models and design the structure of the clamp. First determine the adjustment range of the plug head, and design the clamping range according to the requirements. The expansion and contraction of the plug head can be adjusted within a certain range, and free adjustment can be achieved within this range to meet the "concave surface" situation of profiles of similar models and similar sizes. Plastic surgery requirements. The schematic diagram of the design structure is shown in (Figure 1).

The material used for the shaping plug is determined according to the characteristics of the aluminum profile. Since the aluminum profile is easy to scratch, high-quality graphite blocks (2) and (13) are used in all sliding parts that contact the aluminum profile. The support is made of ordinary steel plates, which are used to fix the graphite blocks. As a shaping plug on the adjustable steel plate support, the pressure plate (22) and splint (24) of the profile can be made of ordinary steel plates, and the pressure plate pad (23) and the plywood pad can be made of rubber plates to increase friction without causing damage. Crush the profile, and use high-strength screws and nuts for the screws in the adjustment parts.

The structural diagram of the plug head is shown in Figure 1. When assembling the plug head, first weld the support fixing sleeve (15) to the adjusting support (5) and base (11) vertical plate, and then connect the plug base (11) and Adjust the support (5) and connect it with the support pin (16) so that it can open and close within a certain range. Then weld the slider fixing sleeve (6) to the slider pad (4) and the adjustment support (5), and then connect the slider pad (4) and the adjustment support (5) with the slider pin (7) together so that it can move within a small range, then put in the central support slider (8) and put on the adjustment screw (10). Adjust the position of the fixed retaining ring (17) and fix it with the retaining ring wearing pin (18), and then install it. Install the fastening nut. Finally, fix the graphite slide blocks (2) and (13) in the corresponding positions with the fastening screws (3). After the assembly is completed, rotate the adjustment screw (10) to drive the center support slider (8) to move left and right without any jamming or jamming. Thereby, the shaping plug head expands and contracts to adjust the required shaping amount. After adjusting the shaping amount, tighten the tightening nut (9) to keep the plug head at the required shaping amount.

The names of the parts represented by the serial numbers in the figure: No. 1, the profile to be shaped, No. 2, graphite slider, No. 3, fastening screws, No. 4, slider pad, No. 5, adjustment support, No. 6, slider fixing sleeve, No. 7, slider Passing pin, No. 8 center support slider, No. 9 fastening nut, No. 10 adjustment screw, No. 11 plug base, No. 12 fastening screw, No. 13 graphite slider, No. 14 shaping platform, No. 15 support fixed sleeve, No. 16 support through pin, No. 17 screw fixed retaining ring, No. 18 retaining ring through pin, No. 19 traction pull ring, No. 20 pressure plate fastening screw, No. 21 support frame, No. 22 pressure plate, No. 23 pressure plate pad, No. 24 Plywood, No. 25 plywood fastening screw, No. 26 baffle, No. 4 Summary No. 27 baffle fixing screw, No. 28 Traction equipment

This method can be used to reshape the "dented" defects on the surface of several large hollow profiles, making them meet the standard requirements for surface clearance.