Threaded fastener and screwing method thereof

Abstract

This invention provides a threaded fastener. The threaded fastener comprises a first screwing part with a threaded portion and a second screwing part matching the threaded portion and having a threaded hole. A first locating portion is arranged on the first screwing part. The central point of the first locating portion is vertically connected with a central axis of the threaded portion to for a first virtual line segment. The thread starting point of the threaded portion is vertically connected with the central axis to form a second virtual line segment. A second locating portion is arranged on the second screwing part. The central point of the second locating portion is vertically connected with a central axis of the threaded hole to form a third virtual line segment. The thread starting point of the threaded hole is vertically connected with the central axis to form a fourth virtual line segment. When the second screwing part is coaxial with the first screwing part, and the second virtual line segment is parallel to the fourth virtual line segment, the first virtual line segment is parallel to the third virtual line segment. This invention further provides a screwing method for the abovementioned threaded fastener. The method has high screwing efficiency without damaging screw teeth.

Description

technical field [0001] The invention relates to a fastener, in particular to a threaded fastener and a screw connection method thereof. Background technique [0002] In the assembly process of workpieces, it is often necessary to use threaded fasteners (such as fasteners that cooperate with bolts and nuts) to assemble multiple parts together. At present, in the occasions where a large number of the above-mentioned threaded fasteners need to be assembled, robots have been used for assembly operations. The assembly process is as follows: first, the bolts and other first screw parts are positioned and inserted in the assembly holes of the workpiece to be fastened, The robot recognizes and grabs the second screw fitting such as the nut, and directly rotates it on the first screw fitting to fasten the part. During the assembly process of the above-mentioned fasteners, it is often difficult to align the thread start point of the second screw part with the thread start point of th...

AI Technical Summary

Problems solved by technology

During the assembly process of the above-mentioned fasteners, it is often difficult to align the thread start point of the second screw part with the thread start point of the first screw part, so that the robot needs to drive the second screw part to bear against the first screw part in advance. The end of the screw-in piece and idle rotation, until the thread start point of the second screw-in piece is aligned with the thread start-point of the first screw-in piece, the second screw-in piece can be rotated and sleeved on the first screw-in piece , its screw connection efficiency is low

In many cases, when the second threaded part is against the end of the first threaded part and idling occurs, the threads of the second threaded part will collide with the threads of the first threaded part, causing the threaded connection Easily damaged, affecting the fastening force of parts assembly

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