All-fiber crankshaft bending upsetting multi-crank indexing positioning device for large-sized ships and application method thereof

Abstract

The invention belongs to the forging field, and particularly relates to an indexing positioning device for multiple cranks of a ship all-fiber crankshaft in a bending upsetting process and an application method thereof. The device is provided with a base, a positioning crank supporting frame with adjustable angle, a locking screw rod, a movable cushion block and the like and is used for accurately determining a forged crank position and fixing the forged crank position in the bending upsetting process of the ship all-fiber crankshaft. After the formation is ended, an angle between center lines of a new forged crank and a forged crank crank arm is a preset value. The angle between the center line of the forged crank crank arm and the horizontal direction is controlled by the positioning crank supporting frame through a theoretical calculation way, the forged crank with determined position is fixed through the supporting seat which is integrated with the base and the locking screw rod, and the preset indexing between the two cranks can be obtained by forming the crank to be forged. The device is used for positioning the multi-crank indexing of the all-fiber crankshaft for large-sized ship, so that the maximal indexing error between any two cranks of a forge piece can be effectively reduced, and foundation is set for further reducing the working allowance of the crank arm in the contour direction.

Description

technical field [0001] The invention belongs to the field of forging, specifically a large-scale marine full-fiber crankshaft bending and upsetting multi-inflection indexing positioning device and its use method. The indexing positioning accuracy between the corners. Background technique [0002] The crankshaft is the most important part of a diesel engine, and the value of the crankshaft of a large marine diesel engine accounts for about 10-15% of the value of the whole machine. At present, most of the large-scale marine crankshafts produced by the full-fiber method adopt bending and upsetting technology. my country basically has the production capacity of this technology, but there is a big gap with the international advanced level: (1) The development of step shaft upsetting to direct upsetting with optical shaft improves the utilization rate of materials and shortens the production cycle; (2) Developed from one fire forging with one turn to one fire forging with multipl...

AI Technical Summary

Problems solved by technology

The traditional indexing positioning method is equivalent to a "dead wrench". After the billet is hoisted, it cannot be adjusted. For the convenience of hoisting, a certain gap is usually left between the positioning mold tire and the positioning crutches. Rod radius and crankshaft spindle-center distance of positioning crank connecting rod are not the same, so it will cause large positioning error

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