Processing method of inner clamp rotation blocks in bending machine die special for special R-shaped sheet materials
A processing method and technology of turning blocks, which are applied in forming tools, metal processing equipment, manufacturing tools, etc., can solve the problems of direct fracture, wear, and low processing accuracy of special R-type plates, and achieve the effect of high hardness and long life.
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Embodiment 1
[0047] Such as figure 2 , image 3 , Figure 4 and Figure 5 As shown, a special R-type plate special bending machine mold is designed, including an upper mold and a lower mold, of which:
[0048] From top to bottom, the upper mold is the upper mold clamping part 1, the upper mold body 2 and the upper mold bottom surface 3; the upper mold bottom surface 3 is composed of five surfaces, which are the first inclined surface 31, the Two slopes 32, semicircle arc surface, the second slope 32 and the first slope 31, the angle between the first slope 31 and the vertical direction is 70°; the angle between the first slope 31 and the second slope 32 is 105°; the line connecting the two endpoints of the semicircular arc surface is parallel to the horizontal plane; figure 2 shown.
[0049] The lower mold includes an inner card rotating block 4, a briquetting block 5, a bolt 7 and a lower mold body 9, and the structure is as follows: image 3 Shown; Lower mold body 9 upper side mi...
Embodiment 2
[0069] Same as embodiment 1, the difference is that the included angle between the second inner surface 44 of the rotating block and the horizontal plane inside the rotating block in the processed device is 70°. In the processing method of the internal card rotating block, the components and mass percentages of the forged blank in step (1) are: C: 0.38%, Mn: 0.77%, Si: 0.35%, S: ≤0.020%, P: ≤0.025% , Cr: 1.78%, Mo: 0.85%, Sc 2 o 3 : 0.05%, the balance is Fe; its annealing temperature is 810 ℃ in the step (2), and the annealing time is 5h, carries out air cooling after being cooled to 540 ℃ in the annealing furnace; In the step (4), heat preservation after first heating to 620 ℃ 1h, then heat to 810°C for 30min, then heat to 870°C, hold for 1h and then quench. The temperature of cryogenic treatment is -195°C, keep for 2h, and then temper at 190°C. The hardness of the inner card rotating block obtained is HRC58, and there is no crack through the magnetic particle inspection. ...
Embodiment 3
[0071] Same as embodiment 1, the difference is that the included angle between the second inner surface 44 of the rotating block and the horizontal plane inside the rotating block in the processed device is 80°. In the processing method of the internal card rotating block, the components and mass percentages of the forged blank in step (1) are: C: 0.43%, Mn: 0.72%, Si: 0.45%, S: ≤0.020%, P: ≤0.025% , Cr: 1.83%, Mo: 0.95%, Sc 2 o 3 : 0.03%, the balance is Fe; its annealing temperature is 840 ℃ in the step (2), and the annealing time is 3h, carries out air cooling after being cooled to 630 ℃ in the annealing furnace; In the step (4), heat preservation after first heating to 540 ℃ 2h, then heated to 840°C and kept for 20min, then heated to 890°C, kept for 0.5h and then quenched. The temperature of cryogenic treatment was -205°C, kept for 1h, and then tempered at 170°C. The hardness of the inner card rotating block obtained is HRC58, and there is no crack through the magnetic pa...
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Abstract
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