Method for producing connection element with circular upper opening and square lower opening

Abstract

The invention discloses a method for producing a connection element with a circular upper opening and a square lower opening. The method for producing the connection element with the circular upper opening and the square lower opening comprises the following steps: a circular pipe is produced from a rectangular plate, the diameter of the circular pipe is equal to the diameter of a circular openingof the connection element with the circular upper opening and the square lower opening, a triangular plate is blanked, the bottom side of the triangular plate is equal to the side length of the square opening of the connection element with the circular upper opening and the square lower opening, and the height of the triangular plate is equal to the height of the connection element with the circular upper opening and the square lower opening; the marking points of quartering angles are marked on circular openings in the two ends of the circular pipe separately, and the marking points at the two ends of the circular pipe are staggered at 45 degrees; the marking point at one end is connected with the two closest marking points at the other end on a pipe wall, and the circular pipe is divided into two halving parts along the connection line; circular openings of the halving parts are fixed, four sharp corners of each halving part are stretched outwards, and a cutting edge in the shape ofan arc line is stretched into a straight line; and the triangular plate is inlaid between the adjacent sharp corners of each halving part, rear edge part welding is adjusted, and the connection element with the circular upper opening and the square lower opening is obtained. According to the method, the material loss is reduced, the part setting-out is simplified, the production efficiency is increased, and the concentricity of the circular opening and the square opening, and the accuracy of the connection element with the circular upper opening and the square lower opening are ensured.

Description

technical field [0001] The invention belongs to the field of steel structure engineering, and in particular relates to a method for making sky-circle-place connectors. Background technique [0002] In steel structure engineering, Tianyuandi is a connecting piece with a round upper mouth and a square lower mouth (or a square upper mouth and a round lower mouth), which is used between round pipes and square pipes. Connection. [0003] The current production method of Tianyuandi is: first divide the Tianyuandi into 8 parts and open the sample separately, according to the situation, the unfolded sample is cut into a whole or divided into several parts, and then the materials are cut by hand hammer or press machine. The plates are subjected to arc bending treatment, and finally the bent plates are assembled, welded and formed. [0004] The above-mentioned method has the following problems: 1) It is more complicated to open the sample in the round sky, and the general operator n...

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Problems solved by technology

[0004] The above-mentioned method has the following problems: 1) It is more complicated to open the sample in the round sky, and the general operator needs to learn to master the method of lofting; The material loss is relatively large for blanking. If the material is divided into multiple sections to reduce material loss, the number of splicing will be large and the production efficiency will be low; 3) In order to ensure the accuracy of blanking, CNC cutting machines must be used for blanking, and the use of equipment is single, which restricts Larger; 4) During the pressing and bending process of the plate, there are unavoidable errors in the transition between the arc and the straight section; 5) After the plate is bent and assembled, the ellipticity of the circular opening is difficult to control; 6) Closing It is difficult to control the concentricity between the circular mouth and the square mouth after assembly

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