US 11,878,378 B2
Process for processing rotary tillage blade for dry farmland based on wasted steel rail
Xu Hao, Hefei (CN); Jun Shen, Hefei (CN); Mazhong Ya, Hefei (CN); Yongkang Ji, Hefei (CN); Bin Wu, Hefei (CN); Biao Li, Hefei (CN); Kun Pan, Hefei (CN); and Shibiao Zhu, Hefei (CN)
Assigned to China Railway General Resources Technology Co., Ltd., Hefei (CN)
Filed by China Railway General Resources Technology Co., Ltd., Hefei (CN)
Filed on Mar. 30, 2023, as Appl. No. 18/128,239.
Claims priority of application No. 202210388406.6 (CN), filed on Apr. 13, 2022.
Prior Publication US 2023/0330790 A1, Oct. 19, 2023
Int. Cl. B23P 15/28 (2006.01); A01B 33/00 (2006.01); A01B 33/10 (2006.01)
CPC B23P 15/28 (2013.01) [A01B 33/00 (2013.01); A01B 33/10 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A process for processing a rotary tillage blade for a dry farmland based a wasted steel rail, comprising the following steps:
S1: selecting a waste annotated steel rail comprised of U71Mn or U75V, breaking the waste annotated steel rail into a rail head, a rail web and a rail bottom in a cutting area by means of a flame cutting device and cutting the waste annotated steel rail; and
applying a hydrostatic pressure to the waste annotated steel rail by using a hydraulic machine to separate the rail head, the rail web and the rail bottom, and in a feeding area, selecting a dedicated clamp to hoist the rail head, the rail web and the rail bottom by means of an automatic feeding robot to complete a feeding;
S2: in a heating area, placing the rail head, the rail web and the rail bottom in an electric heating furnace to be heated to red blanks, rolling the red blanks in a hot rolling area, and performing air cooling and cutting and packaging in a cutting and packaging area to form a blank raw material of the rotary tillage blade;
S3: feeding a blank of the blank raw material to a rotary tillage blade production line, wherein the rotary tillage blade production line comprises a transporting device, a blanking device, a punching device, the electric heating furnace, a bending device, a hot forging device, a thermal treatment device, a packaging device and an integrated control unit,
transporting, by the transporting device, the blank raw material to a blanking area of the blanking device,
cutting and segmenting a raw material blank according to a model of the processed rotary tillage blade,
punching the cut and segmented raw material blank by means of the punching device according to a shape of the rotary tillage blade, and
breaking the raw material blank into blanks before a processing of the rotary tillage blade;
S4: orderly placing the blanks before the processing of the rotary tillage blade in multiple layers in the electric heating furnace to be heated to red blanks;
S5: completing a size processing such as a turning radius and a bending angle in a tangent plane on the heated red blanks through a bending step of the bending device, and processing an outline structure of the rotary tillage blade by means of the hot forging device;
S6: annealing the formed rotary tillage blade by means of the thermal treatment device, wherein as hardness values of a handle and a body are different, the thermal treatment device needs to be placed to perform a thermal treatment on the handle and the body, a surface hardness and a wear resistance of the handle and the body meet a requirement of technical indexes, wherein the surface hardness of the handle is controlled at 40 HRC, and the surface hardness of the body is controlled at 50 HRC; and
S7: spraying the rotary tillage blade subjected to the thermal treatment by means of the packaging device or cartoning a rotary tillage blade finished product.