Heat Treatment Method of Resonant Plate Iron Plate String Nut

Abstract

A heat treatment device for resonating plate iron plate string pillows, including a machine base, a workbench is provided on one side of the machine base, and a laser head is arranged on the Z guide rail of the machine base; the laser head is located above the workbench, and the workbench There is a fixture with a reference hole for positioning and clamping, which is used for positioning and clamping the resonant disc; a laser is also installed near the machine base, and the beam emitted by the laser is transmitted to the laser head through the mirror lens in the optical path of the machine tool. A method for heat-treating the iron plate of the resonating plate by using the above-mentioned device, so that the laser head moves along the top of the nut of the resonating plate, and the laser emitted by the laser head makes the top of the saddle harden by phase transformation; through the above steps, the iron plate of the resonating plate is realized. Nut heat treatment. The invention provides a heat treatment device and method for a resonating plate iron plate string nut, which can greatly increase the hardness of the string nut without changing the shape and structure of the resonating plate. After testing, the hardness of the string nut has been increased from HRB80 to above HRC40, which meets the actual requirements and meets the requirements of long-term playing or tuning.

Description

technical field [0001] The invention relates to the field of piano production, in particular to a heat treatment method for a resonating plate iron plate string nut. Background technique [0002] Such as Figure 4 As shown in , the strings in the piano resonant board need to bypass the string nut, and the iron plate string nut is one of the key stress points. After a single string is dialed to the standard tone, the string tension can reach about 100kgf on average. During the long-term performance or tuning process, the strings will generate greater friction and pressure on the string nut, which will destroy the originally flat and smooth arc surface of the string nut R into an uneven zigzag shape, resulting in noise and unbalanced or uneven timbre transition. Clean, seriously affecting the tone quality of the piano. The current iron plate is made of gray cast iron HT150, with a hardness of around HRB80. The hardness of the nut cannot meet the needs of long-term performance...

AI Technical Summary

Problems solved by technology

[0002] like Figure 4 As shown in , the strings in the piano resonant board need to bypass the string nut, and the iron plate string nut is one of the key stress points. After a single string is dialed to the standard tone, the string tension can reach about 100kgf on average. During the long-term performance or tuning process, the strings will generate greater friction and pressure on the string nut, which will destroy the originally flat and smooth arc surface of the string nut R into an uneven zigzag shape, resulting in noise and unbalanced or uneven timbre transition. Clean, seriously affecting the sound quality of the piano

The current iron plate is made of gray cast iron HT150, with a hardness of about HRB80. The hardness of the string nut cannot meet the needs of long-term playing or tuning.

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