Processing equipment of large-radius arc surface on rib wood of piano

Abstract

The invention discloses processing equipment of a large-radius arc surface on a rib wood of a piano. The processing equipment comprises a rack, a working platform, a power wheel, a tensioning wheel, a profiling grinding head, a grinding belt and a power device, wherein the power device is connected with the power wheel; the profiling grinding head is fixed on the rack and is provided with an arc-shaped surface; the grinding belt surrounds on the power wheel, the tensioning wheel and the profiling grinding head to form a closed triangle; a processing space for allowing the end part of the rib wood to be pushed in during processing is formed between the profiling grinding head and the working platform; and the outer diameter of the grinding belt positioned on the arc-shaped surface of the profiling grinding head is equal to the radius of the large-radius arc surface on the rib wood. The processing equipment disclosed by the invention has the advantages of high working efficiency, high accuracy and low labor intensity.

Description

technical field [0001] The invention relates to a processing device for piano parts, in particular to a processing device for a large-radius arc surface on a piano rib. Background technique [0002] see figure 1 , The rib 1 is an important part of the piano, which is bonded on the soundboard 2 of the piano to improve the elasticity and hardness of the soundboard 2, and simultaneously it can transmit sound waves to the whole soundboard 2 rapidly. The wood texture of piano soundboard 2 and strings is arranged diagonally from low, middle to high tones, and the grain direction of rib 1 is vertically arranged with soundboard 2 and strings, so that the wood texture forms a horizontal and vertical cross network , so that the sound is excited at any point of the string code, and it can quickly spread throughout the entire soundboard 2 . [0003] Because the stress at both ends of the rib 1 decreases, it is cut into an arc surface 1-1, which can avoid the two ends of the rib 1 from...

AI Technical Summary

Problems solved by technology

[0004] The processing method of the arc surface 1-1 on the existing rib 1 is to roughly machine the contour of the arc surface 1-1 according to the mold surface with a woodworking chisel, leaving a certain machining allowance; Plan out according to the arc contour, and then use the inspection mold to check whether it meets the requirements

This existing processing method has the disadvantages of low efficiency, poor precision and high labor intensity, and when rough machining is performed with a woodworking chisel, the cutting tool may extend along the wood grain. , if the amount of feed is large, there will be tearing along the direction of the wood grain

Processing products and even waste products appear when the tear surface even exceeds the machined contour surface

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