Process of molding saxophone trumpet

Abstract

The invention relates to a process for molding a saxophone trumpet. The process comprises the following steps of: firstly calculating the diameter of a circular blank according to the weight of a trumpet which needs to be processed; then selecting the circular blank and blanking; drawing the circular blank into a cylindrical revolution body with a flange; arranging the cylindrical revolution body with the flange on a spindle which is matched with the conical cavity of the trumpet in shape to obtain a conical revolution body with the flange; filling fillers into the cavity of the conical revolution body with the flange and bending the conical revolution body by using a tool clamp; arranging the bent conical revolution body on a bent spindle which is matched with the bent conical revolution body in bending degree and then reforming; and finally, trimming and hemming the flange part. By the adoption of the process provided by the invention, the wall thickness of the processed saxophone trumpet is uniform, a gold-phase organizational structure of the material does not change obviously, the internal stress is consistent, and the vibration frequency is uniform, so that the tone is more elegant.

Description

technical field [0001] The invention relates to a wind instrument manufacturing process technology, more specifically, to a saxophone bell mouth forming process. Background technique [0002] At present, the molding method of the saxophone bell mouth is to use sheet metal welding, and then undergo several times of plastic processing. The disadvantages of this process are as follows: 1. The bell mouth is equivalent to the speaker, and high-temperature melting welding is used during welding, which destroys the metallographic structure of the base material, affects the consistency of the material, and makes the pronunciation relatively opaque and bright. It affects the vibration effect of the musical instrument; 2. During the processing, it is easy to cause pores in the weld seam, and the corrosion resistance is reduced; 3. The base metal at the weld seam becomes thinner due to melting and welding, and the pipe body is uneven and affects the appearance. relatively difficult. ...

AI Technical Summary

Problems solved by technology

The disadvantages of this process are as follows: 1. The bell mouth is equivalent to the speaker, and high-temperature melting welding is used during welding, which destroys the metallographic structure of the base material, affects the consistency of the material, and makes the pronunciation relatively opaque and bright. It affects the vibration effect of the musical instrument; 2. During the processing, it is easy to cause pores in the weld seam, and the corrosion resistance is reduced; 3. The base metal at the weld seam becomes thinner due to melting and welding, and the pipe body is uneven and affects the appearance. relatively difficult