SU1409393A1 - Method of broaching large ingots - Google Patents

Description

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The invention relates to the processing of metals by pressure, mainly to the forging of rotors, and can be used in mechanical engineering.

The aim of the invention is to improve the quality of the metal of the axial zone of the ingot.

FIG. 1 shows a section A-A in FIG. 3, forging after additional reductions; in fig. 2 is a section BB in FIG. 3, over the tops of the portions with a concave surface in longitudinal sections lying in adjacent surfaces concave in cross section; in fig. 3 - forging after crimping, general view; in fig. 4, 5, 6 - sections B-B, G-Fj D-D, respectively, in FIG. 7, by

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the cross section, which are adjacent to the surfaces concave in the cross section of the preform, is chosen from condition 0,. After completing the dopatin reductions on the second concave surface along the entire length of the workpiece, the last turning is performed, and the process is repeated. As a result, the development of the axial zone of the ingot is improved. Example. On an octahedral ingot weighing 205 tons with a diameter of profitable and bottom parts of 2760 and 2360 mm, respectively, and a body length (without, profitable and bottom parts) of 3560 mm at a press of 12000 tons, the forks of the profitable part (01200 m, length 3000 mm) and from the bottom (0 1020, length 1500 mm)

to the tops of the adjacent sections with a concave biliation was performed. After the sub-longitudinal cross-sections, after the outgrowth, special

reductions with trimming in cut-out strikers; on top of the bulging with a radius skrugfig. 7 - forging after crimping, general view. Plots 800 mm to a depth of 350 mm throughout

The method is carried out by following the length of the ingot to obtain through cong. that surface. Then turned the workpiece

The ingot was pre-crimped by the convex-20 at 120 ° and the tensions were repeated. The process is twisted in cross-section by dies up to the tor or another time. Then on each of the three

curing concave surfaces along the entire length of the ingot. A blank is obtained with the cross sections shown in FIG. 1, 2, 4, 5, 6. Then, additional crimping is performed by strikers, convex in longitudinal section. First, the cutting is performed with step I, along the axis of symmetry of one of the concave surfaces of the workpiece. Step 1, is chosen from the condition, 2U, where 1 "is the length of the section with a concave surface of 30 ingot forged on a circle 0 1650 mm and length

the concave faces of the workpiece carried out additional crimping spherical. briskly with a radius of 800 mm to a depth of 350 MNI. The size of the recess in the longitudinal section of the joint was 1300 mm, the spacing between the recesses of 1950 mm, the distance between the tops of the recesses on the adjacent adjacent concave The facet x was a minimum of 650 mm, a maximum of 1300 m. m. Thereafter

longitudinal section. After completing additional reductions across the entire Dutin, the blanks are turned over and the next concave surface of the blank (adjacent to the first) is crimped. At the same time, the distance 1 between the vertices of the sections with a concave surface in the longitudinal

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8400 mm. Further forging heated rotor shaft with a length of 12800 mm, a maximum diameter of 1400 mm and minimum diameters at the ends of 740 m. The proposed drawing method allows to improve the development of the axial zone of the ingot and improve the quality of forgings without precipitation.

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the cross section, which are adjacent to the surfaces concave in the cross section of the preform, is chosen from condition 0,. After completing the dopatin reductions on the second concave surface along the entire length of the workpiece, the last turning is performed, and the process is repeated. As a result, the development of the axial zone of the ingot is improved. Example. On an octahedral ingot weighing 205 tons with a diameter of profitable and bottom parts of 2760 and 2360 mm, respectively, and a body length (without, profitable and bottom parts) of 3560 mm at a press of 12000 tons, the forks of the profitable part (01200 m, length 3000 mm) and from the bottom (0 1020, length 1500 mm)

ingot forged on the circle 0 1650 .mm and length

the concave faces of the workpiece carried out additional crimping spherical. briskly with a radius of 800 mm to a depth of 350 MNI. The recess size in the longitudinal section of the joint was 1300 mm, the spacing between the recesses was 1950 mm, the distance between the tops of the recesses The facet x was a minimum of 650 mm, a maximum of 1300 m. m. Thereafter

ingot forged on the circle 0 1650 .mm and length

8400 mm. Further forging heated rotor shaft with a length of 12800 mm, a maximum diameter of 1400 mm and minimum diameters at the ends of 740 m. The proposed drawing method allows to improve the development of the axial zone of the ingot and improve the quality of forgings without precipitation.

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Claims (1)

(541 METHOD OF DRAWING LARGE INGOTS, including crimping an ingot with strikers with a convex working surface and tilting it relative to the longitudinal axis to obtain surfaces concave in the cross-section of the ingot whose rectilinear generatrices are located along the longitudinal axis of the ingot, we distinguish that in order to improve the quality of the metal in axial zone of the ingot, along the axis of symmetry of the ingot in the cross section of the ingot of surfaces along the longitudinal axis of the ingot, additional crimping is carried out to obtain sections with a concave surface in the nyh sections.