2results about How to "Solve the quick positioning" patented technology

The invention provides a construction method of a prefabricated multi-ribbed cavity floor, and belongs to the technical field of prefabricated multi-ribbed plate construction. The construction method of the prefabricated multi-ribbed cavity floor comprises the steps of full-hall scaffold building, main keel laying, overall leveling and the like. The construction method comprises the steps that S1, full-hall scaffold building is conducted, specifically, when a full-hall scaffold is built, vertical rods on the upper layer and the lower layer are required to be aligned, the vertical rods are uniformly arranged from the two sides of a cast-in-place ribbed beam, the vertical rods are arranged at the intersection positions of floor elastic bidirectional lines, and scaffold boards are laid under the vertical rods; S2, main keels are laid, specifically, when the main keels are installed, the main keels are required to be arranged in order and not to be inclined, and the two vertical rods at the intersection positions must abut against the main keels; and S3, overall leveling is conducted, specifically, after the main keels are laid, overall leveling is conducted according to control lines, and full-hall scaffold formworks are hoisted on the main keels. The cavity formworks are supported by placing the modularized cavity formworks which are machined and formed in a factory-like mode, and accurate and rapid installation of an upper plate of the prefabricated multi-ribbed plate is achieved by installing limiting square pipes.

The utility model discloses an adjustable limiting device for machining a central hole in a crankshaft, which is provided with a bottom plate, the bottom plate is provided with left V-shaped iron and right V-shaped iron, and a crankshaft is erected between the left V-shaped iron and the right V-shaped iron; an axial positioning seat is arranged in the direction perpendicular to the crankshaft, an axial positioning pin is sleeved in the axial positioning seat in a penetrating mode, an outer ring of the axial positioning pin abuts against the inner wall of the axial positioning seat, a bottom plate of the axial positioning seat is connected with a bottom plate, and an angular positioning seat is arranged on the front portion, corresponding to the axial positioning pin, of the bottom plate. The crankshaft angular positioning device has the advantages that the axial positioning pin can be inserted into a crankshaft thrust gear to position the axial size, the crankshaft is rotated to enable a connecting rod neck to fall on the angular positioning block, and angular positioning of the crankshaft is achieved; the problems of quick positioning and multi-model adaptation in crankshaft center hole machining are solved.