Interpretation of spinning forming process of glass solder lamp
In the production of glass solder lamps, a technology of making copper plates into various modeling accessories is often used---Spinning technology.
It is a traditional technology with a long history. The first field of application was the ceramic field. Later, the metal spinning process was gradually developed.
Especially in recent years, with the continuous emergence and rapid popularization and application of high-precision numerical control spinning machines, because these spinning equipment have been basically finalized and the products produced are rich and varied in appearance, it has become an indispensable molding technology in the manufacturing process of glass solder lamps.
The spinning process of glass solder lamp combines the advantages of forging, extrusion, stretching, bending, ring rolling, cross rolling and rolling extrusion, thus achieving no cutting or less cutting of copper parts.
Thereby greatly improving the aesthetics of the glass solder lamp accessories.
When making glass solder lamp glass fittings, workers tighten the brass cylinder blank, flat blank or preform with the tail top to the spinning movement die (Is the shape of the glass solder lamp accessories mold)
In fact, the main shaft drives the mandrel and the blank to rotate at a high speed, and at the same time, the spinning wheel squeezes the material on the rotating core die from one side of the blank, so that brass produces point-by-point continuous plastic deformation, so as to obtain hollow rotating body parts of various bus shapes.
In the process of making all-copper fittings for glass solder lamps, people divide the spinning process into ordinary spinning and strong spinning according to the change of blank thickness during spinning.
Ordinary spinning mainly changes the shape of the blank, while the wall thickness changes little or not.
Power spinning is mainly to change the wall thickness and diameter of the workpiece, and the length of the workpiece will be changed accordingly.
These two methods have their own advantages from a technical point of view, and different spinning methods should be selected mainly according to the fitting shape of glass solder lamp.
In addition, when making all-copper fittings for glass solder lamps with larger thickness and thicker thickness, the copper plate is often heat treated in advance.
The main purpose is to avoid serious hardening of copper plate due to strong pressure and tensile stress during spinning, and heat treatment must be adopted to soften it.
The spinning products of glass solder lamps have various shapes. Through spinning, various tasks such as forming, shrinking, closing, sealing, flanging, Hemming, rib pressing, etc. can be completed.
Therefore, materials such as copper cover, lamp ancient, copper ball, lamp disc, half element, suction top plate, garden back plate, gourd tube and the like of glass solder tin lamp are all made by spinning technology (As shown below).