Optimization method of isothermal bending process for titanium alloy sheet
A titanium alloy, isothermal technology, used in metal processing, metal processing equipment, manufacturing tools, etc., can solve the problems of bending angle error, straight edge distortion, etc., to achieve the effect of improving accuracy and meeting high-precision requirements
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Embodiment 1
[0023] This embodiment is aimed at V-shaped bending parts. In order to determine the conditions for maintaining precise correspondence between the rolled plate and the bending forming die, the test device under the condition of isothermal bending is shown in Figure 1, including: a concave die 1 and a punch 2 arranged oppositely , the die set 3 connected with the die 1 and the guide block 4 connected with the punch 2 .
[0024] The concave mold 1 is provided with a working surface of a 90° V-shaped groove, and its bending radius is 66mm, as shown by the dotted line.
[0025] Step 1) Set the die 1 in the die set 3, lay the blank on the die 1, align the punch 2 with the working surface of the die 1 and press down.
[0026] The outline size of the blank is 100×20mm, and the thickness is 1mm.
[0027] Preferably, the place where the blank is placed in the above-mentioned testing device is provided with a medium-frequency induction heating and temperature-controllable electric furn...
Embodiment 2
[0047] In this embodiment, for the titanium alloy TA15 and TC2 plates, the temperature is determined by a method similar to that of Embodiment 1, as shown in Table 2 for details.
[0048] Table 2 Isothermal bending temperature value under the condition of bending angle relative error Δ=0
[0049]
[0050] It is concluded from Examples 1 and 2 that there is the minimum relative bending angle error, which is 750-780°C for the titanium alloy TA15 plate and 670-710°C for the TC2 plate.
Embodiment 3
[0052] This embodiment is aimed at П-shaped bending parts, according to the parts manufactured by isothermal bending with minimum error shape mold equipment, such as П-shaped parts are fixed by the plane part of the researched material blank, such as Figure 4 shown.
[0053] Step 1) Drill a hole in the blank and fix it in the mold by positioning pin 6 to prevent displacement during deformation.
[0054] Step 2) Bending isothermally, and setting the holding time of the blank to 1 min, 2 min and 3 min respectively, and then taking it out from the mold.
[0055] Step 3) After the sample is deformed, under the tool microscope according to the coordinates Y1 and Y2 (see Figure 5 ) size observation:
[0056] The measurement results are listed in Table 3 and the size deviation between the sample size and the design can be determined. It can be seen that the highest dimensional accuracy of the sample after forming reaches the test results corresponding to isothermal bending, and t...
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