Shot blasting process for crankshaft

Abstract

The invention discloses a shot blasting process for a crankshaft. The process is characterized by comprising the following steps: the crankshaft is placed into a cleaning solution added with anti-rustoil for cleaning and dried; the dried crankshaft is placed on a lathe, wherein a 6140 common lathe is preferably adopted, two ends of the crankshaft are separately located into a three-jaw chuck andon a tip of a tailstock, and a motor is started and a lathe spindle rotates at the speed of 1.5-2.5 r / s; during grinding, corresponding grinding time is selected according to the surface condition ofeach part of the crankshaft to ensure sufficient grinding; the ground crankshaft is suspended on a rotating suspending device and in a central axis of a shot blasting bin, after a shot blasting bin door is closed, the suspending device rotates at the rotating speed of 5.2 rpm, a plurality of injecting holes are formed in the periphery side wall, far away from the center of the shot blasting bin for 0.8m, and steel shots with the diameter of 0.75mm are injected into the surface of the crankshaft from the injecting holes at the shot blasting amount of 300 kg / min. The process can greatly improvethe strength and reliability of the crankshaft, thus obtaining an excellent shot blasting effect.

Description

technical field

[0001] The invention belongs to the technical field of crankshaft processing, and in particular relates to a crankshaft shot blasting process. Background technique

[0002] Because the crankshaft carries a large load, the strength requirement is high. When processing the crankshaft, the crankshaft needs to be strengthened. Shot blasting is a way of strengthening the crankshaft. It can not only strengthen the strength of the crankshaft after casting, but also Clean and remove rust. Shot blasting is the name of a mechanical surface treatment process, and similar processes include sandblasting and shot peening. Shot blasting is a cold treatment process, which is divided into shot blasting cleaning and shot blasting strengthening. As the name implies, shot blasting is to remove impurities such as surface oxide skin to improve the appearance quality. Shot blasting is to use high-speed moving projectile flow to continuously impact the surface of the workpiece to b...