High speed pressing and forming method of warm powder and device thereof
A high-speed pressing and powder technology, applied in the field of powder metallurgy, can solve the problems of restricting research and development, unable to achieve high-speed pressing and forming of warm powder, and achieve the effects of avoiding uneven density distribution, simple structure and low cost.
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[0027] Example 1
[0028] A warm powder high-speed compaction method is an integrated technology of warm compaction and high-speed compaction. This technology uses a motor to adjust the drop height of the hammer to obtain different impact speeds at different drop heights of the hammer. The impact of the hammer falling and hitting the upper die is generated. The shock stress wave transfers the energy to the warm powder through the upper die punching, so that the warm powder is quickly and densely formed. The warm powder high-speed compaction forming device that realizes the above method is such as figure 1 As shown, it includes a fixed pulley 1, a motor with a model of MR5130 and a power of 40W, a frame 3, a guide tube 4, a hammer 5 with a mass of 10kg, an upper template 6, a side template 7, a photoelectric sensor and a pulse meter. Part of the speedometer 8, in which the photoelectric sensor is a BR20M-TDTL through-beam photoelectric sensor, the upper and lower die punches 9, 11...
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[0033] Example 2
[0034] This embodiment uses the mold wall lubrication technology on the basis of Example 1, that is, uniformly coats 1 μm thick HW anhydrous ethanol suspension in the cavity of the mold 13. The structure of the device, its connection relationship, and the implementation are all consistent with the implementation Example 1 is the same. figure 2 It is a curve diagram of shock wave suppression under the conditions of whether the mold wall lubrication technology is used in the method of the present invention. From figure 2 The maximum impact force is 349.1KN, the action time is about 34ms, and the green density of the sample is 7.61g / cm 3 , The green body demolding force is 45.3KN. It can be seen that the warm powder high-speed compaction combined with the mold wall lubrication technology increases the maximum impact force by about 42.8KN, and the powder action time is extended by about 12ms, thus further increasing the density of the green body and reducing th...
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