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Influence of cutting machine on inclined bed CNC lathe on heat treatment workpiece

The inclined bed CNC lathe adopts a diagonal layout, and the bed is a hollow structure, which greatly improves the bending and torsional rigidity of the machine tool during work, and has high stability. The high rigidity and high stability of the inclined bed CNC lathe provide a powerful guarantee for the high precision of machine tool processing.

    The slant bed CNC lathe is mainly used for the processing of precision and complex rotary parts. It can process inner and outer circles, step faces, cone faces, spheres, grooves, thread picks and complex curved surfaces. It can meet the rough and fine processing of blanks for castings and forgings such as copper, aluminum, iron and stainless steel.

    The slant bed CNC lathe has good reliability, strong rigidity, high precision, long service life and fast speed. It can reliably and stably complete the coarse, fine and fine processing of various difficult-to-machine materials. The rotary tower knife has high positioning accuracy and small re-cutting deformation.

    The influence of cutting on the quality of the workpiece includes surface decarburization, residual stress, machining allowance, surface finish, removal of carbon-depleted layer, etc., which is when the workpiece is in quenched, normalized, annealed state and the hardness is lower than 45HRC. However, the effect is not obvious and will not cause changes in the potential performance of the workpiece.

    Hard processing refers to the processing of steel or workpiece hardened by workpiece. The higher hardness of 50-65HRC, bearing steel, high-speed steel, roll steel, ordinary hardened steel and quenched mold steel have obvious influence on cutting. A certain degree of damage to the surface of the machined workpiece mainly includes cutting heat generation and conduction, high-speed friction and wear during the cutting process. The integrity of the machined surface of hard cutting mainly includes surface morphology and its degree, surface roughness, dimensional accuracy, distribution of residual stress and white layer generation.

    The surface hardness of the machined workpiece increases as the feed rate and the amount of cutting decrease, and increases as the cutting speed increases. The higher the hardness of the surface of the machined workpiece, the greater the depth of the hardened layer. After hard cutting, the surface of the workpiece is residual compressive stress, and the maximum compressive stress of the workpiece after grinding is mainly concentrated on the surface of the workpiece.

    The most influential factor on the surface integrity of the workpiece is the hardness of the workpiece. The greater the hardness value of the workpiece, the more favorable the formation of residual compressive stress. The larger the obtuse angle of the tool used for cutting, the larger the residual compressive stress value; the higher the hardness of the workpiece, the larger the residual compressive stress value.

    The formation of a white layer is another important factor affecting the quality of the surface of a workpiece that has been hard-cut. A form of tissue that is formed along with the hard cutting process is the white layer. The white layer has unique grinding characteristics, namely high hardness, good corrosion resistance and high brittleness. Higher brittleness tends to cause early spalling failure, even after forming a stage after the workpiece is processed and cracking.

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Shandong Jining Qingfeng Machinery Hardware Co.,Ltd

Address: NO.47 Jinyu Road, Jining, Shandong

Tel: +86-537-3281595

Fax: +86-537-3281597

E-mail: info@qfmh.com

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