Incremental forming method of local heating plate beyond machining point
A technology of incremental forming and local heating, used in metal processing equipment, forming tools, manufacturing tools, etc., can solve problems such as sheet metal rupture and large sheet deformation, and achieve the effect of improving forming performance
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Embodiment 1
[0024] Example 1: 3003 aluminum plate was selected as the experimental processing material, and the aluminum plate was cut into 30 shaped plates of 18×18 mm on a shearing machine for use in the experiment. Divide the 30 sheets into 3 groups, respectively adopt the general incremental forming method and the local heating sheet incremental forming method outside the processing point of the two heating methods provided by the present invention to process conical workpieces with the same shape, same height, and same forming angle , the forming angle of the processed conical parts is 85°, and the forming height is 35mm.
[0025] During the forming process, observe whether the formed part is cracked, and record the processing height when the part is cracked. When the part is cracked, stop processing immediately. By comparing the number of cracks and the cracking time of each group of parts obtained by the two progressive forming methods The processing height is compared with the inf...
Embodiment 2
[0030] Example 2: Using the eddy current coil heating method provided by the present invention to process the second group of 10 sheets by using the incremental forming method of locally heating the sheet outside the processing point, and putting three eddy current coil heating elements into the sheet on the fixture In the non-processing area, according to the progressive forming processing progress, the power supply of the heating block is turned on and off in proportion to heat the sheet metal in the heating area, so that the temperature of the sheet material in the heating section of the heating block reaches the range of 220-270 °C, and the CNC incremental forming is operated. Machine tool for incremental forming of parts. Finally, the forming results of 10 shaped parts processed by this method are shown in Table 2.
[0031] The parameters of the eddy current coil heating device are as follows:
[0032] AC frequency: 50kHz;
[0033] Working voltage range: 180~250V;
[0...
Embodiment 3
[0038] Embodiment 3: The third group of 10 sheets is processed by using the progressive forming method of locally heating sheets outside the processing point of the resistance block heating method provided by the present invention, and the sheets of two resistance heating heating elements are placed on the fixture. In the processing area, according to the progressive forming processing progress, turn on and off the power supply of the heating block in proportion to heat the sheet metal in the heating area, so that the temperature of the sheet material in the heating section of the heating block reaches the range of 220-270°C, and operate the CNC incremental forming machine tool , for incremental forming of parts. Finally, the forming results of 10 shaped parts processed by this method are shown in Table 3.
[0039] The parameters of the resistance heating device are as follows:
[0040] AC frequency: 0-50kHz;
[0041] Working voltage range: 160~250V;
[0042] Maximum input ...
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