Special machine for fine boring of pin holes in crankshafts

Abstract

The invention discloses a special machine for fine boring of pin holes in crankshafts. The special machine comprises a machine body, wherein a shock pad is arranged at the bottom of the machine body; a boring mechanism for driving a cutter to feed for boring and a clamp for pre-positioning, feeding, positioning and clamping the crankshafts are arranged on the upper portion of the machine body in the length direction; a hydraulic sliding table is arranged below the boring mechanism; a sliding saddle of the hydraulic sliding table is fixedly connected with the boring mechanism and drives the boring mechanism to finish feeding motion; a clamp adjusting mechanism is arranged at the bottom of the clamp; and the bottom of the clamp is fixedly connected with the clamp adjusting mechanism. According to the special machine, pre-positioning, feeding, positioning, clamping, boring and discharging processes of the crankshafts are automatically finished in one working cycle, fine boring of the pin holes and chamfering of hole ends are finished, the production takt is smaller than or equal to 35 seconds per 2 pieces, and the boring precision and the roughness meet grinding requirements; and the machining requirements of high efficiency and high precision of parts are met, the special machine is suitable for mass production, and the crankshafts with different diameters can be machined by adjusting the center distance between the pin holes and the crankshafts.

Description

technical field [0001] The invention relates to the technical field of crank shaft processing, in particular to a special machine for fine boring pin holes of crank shafts. Background technique [0002] The crankshaft is one of the important parts in the gasoline engine, the quality of this part directly affects the performance of the gasoline engine. The existing pin hole processing technology is rough boring pin hole, proficient in pin hole, grinding hole, in order to meet the requirements of the drawing, namely: hole diameter dimension accuracy level 6, center distance dimension accuracy level 6, roundness tolerance 0.004, cylindricity tolerance 0.004, pin The parallelism between the axis of the hole and the axis of the crankshaft is 100: ∅0.02, and the surface roughness of the hole is 0.8. The existing crankshaft pin hole processing method has complex procedures and low production efficiency, and is not suitable for mass production needs. Contents of the invention ...

AI Technical Summary

Problems solved by technology

[0003] Technical purpose: Aiming at the problems of complicated processing procedure and low production efficiency of existing crank pins, the present invention discloses a special machine for fine boring pin holes of crank shafts with high production efficiency, cost saving and adapting to the needs of mass production.

Images