A kind of piano peg manufacturing process

Abstract

Disclosed in the invention is a manufacturing process of a piano tuning peg. Blanking of a raw material for manufacturing a tuning peg is carried out; a small circular head and a large circular head are processed by a lathe; roll finishing and centerless grinding are carried out on the shaft after lathe processing and then square smashing and centering are carried out on the shaft; hole drilling is carried out on shaft by a drilling machine and burrs are removed; electroplating is carried out on the shaft after hole drilling; and then lathe threading is carried out on the shaft. According to the invention, the square smashing head device is used and no solid particle or peeling phenomenon occurs after copper-nickle-chromium electroplating, so that the exposed square head is smooth and shiny; the threads are clear because the lathe threading is carried out after the electroplating and thus screwing to a pin block becomes firm without screw loosening.

Description

technical field [0001] The invention relates to the technical field of piano manufacturing, in particular to a manufacturing process of a piano peg. Background technique [0002] At present, on the pegs of the same single large product on the market, the square head is not smooth, and it can be clearly seen after electroplating, which affects the visual appearance. At the same time, when using special tools to rotate, the electroplating layer on the surface will fall off; the thread is made of In the thread rolling process, the thread is first rolled and then electroplated. The depth of the thread is shallow, and it becomes shallower after electroplating. Contents of the invention [0003] The object of the present invention is to provide a piano peg manufacturing process to solve the problems raised in the above-mentioned background technology. [0004] To achieve the above object, the present invention provides the following technical solutions: [0005] A kind of pian...

AI Technical Summary

Problems solved by technology

[0002] At present, on the pegs of the same single large product on the market, the square head is not smooth, and it can be clearly seen after electroplating, which affects the visual appearance. At the same time, when using special tools to rotate, the electroplating layer on the surface will fall off; the thread is made of The thread rolling process is first rolled and then electroplated. The depth of the thread is shallow, and it is even shallower after electroplating. It is not fast enough to screw on the peg board and is easy to slip.

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