Process method and special device of helical blade

Abstract

The invention relates to a processing method and a specific device for a spiral blade. The processing method of the invention essentially adopts strip shaped materials to form through binding and enwinding. The specific device of the invention consists of a taper roller extruding press and a drag winding machine. An outlet of the taper roller extruding press is arranged correspondingly to an inlet of the drag winding machine. The taper roller extruding press comprises a frame, at least one pair of taper rollers ad a drive device. The conicity of the taper roller is 1 to 15 degrees. Two taper rollers are arranged in the same direction and the axes are in an included angle of 1 to 10 degrees. The bigger head parts of the rollers have a small gap and the drive device is connected with the rollers. The drag winding machine comprises a frame, a rotary shaft, three drag rollers uniformly arranged at the circumferential direction of the rotary shaft and a drive device. The drag rollers are provided with V-shaped slot. The axes of the three drag rollers are parallel to the rotary shaft and arranged in an equal distance on height. The rotating directions of the rotary shaft and the three drag rollers are opposite. The invention omits a plurality of working procedures, improving the efficiency and has a high product precision.

Description

technical field [0001] The invention relates to a processing method and special equipment for a spiral blade, in particular to a processing method and special equipment for forming a steel strip into a spiral blade by cold extrusion. Background technique [0002] A large number of screw blades are used in many grain processing equipment, such as screw conveyors, root removers, wheat turning machines, and horizontal screw unloaders. In the past, such a process was used in the production and processing of these parts: firstly, a disc with a certain diameter was cut from the whole steel plate, and then a circular hole was punched in the center of the disc to make it a ring; A notch or slit is cut on the top; the above is stretched axially to make it into a spiral shape, and finally several of these parts are welded into spiral blades. The disadvantage of this method is obvious. First of all, from the perspective of material consumption, it will cause a lot of waste of material...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is obvious. First of all, from the perspective of material consumption, it will cause a lot of waste of materials, and about 1 / 2 of the materials will become scraps, especially when precious alloy materials such as stainless steel are used in some occasions. Processing costs are higher

At the same time, due to the welding process, the spiral blades produced by this method have low precision, low production efficiency, and high labor intensity.

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