Customization of the harmonicas with Titanium
In the field of harmonics, both diatonic and chromatic, there have been and will be many maintenance and improvement works in our harmonicas. Mainly they are improvements as far as the adjustment of tolerances, measures and clearances of the spaces, but also we can realize improvements with the construction and substitution of components in the harmonicas. In this first article, I will detail the process of construction of a body for a Hohner 270 of 12 channels, choosing as raw material the most modern metal in terms of mechanical properties and weight lightness such as Titanium.
This metal has high characteristics in the tables of hardness, almost no influence on corrosion and a molecular weight that although not perfectly light as plastics and wood, offers many qualities in its reduced weight.
Again, we indicate that this work has been carried out by a company in the Metal and Mechanized sector, and this work on these parts has entailed extreme difficulty in some phases of its construction. It can only be described as a “laborious” work, with part the process has been done by machines and tools of a usual workshop, with different phases made by special tools while expensive.
The harmonics that use these metal parts as particularly is the Titanium, begin the eternal debate of the modification of the sound that can be resulting. For various reasons the diatonic harmonicas are not very influenced in the sound while using bodies / combs of Titanium, somewhat different case with the chromatic ones. These opinions are very objective and should be obtained individually, since this debate has not yet finished, follows its process of meeting authoritative opinions and in our case, soon a new article will be made on the influence of the materials that make up the harmonica for a possible clarification on the matter. In any case, the result of these harmonics is based on obtaining an excellent quality in the creation of a harmonica, based on the choice of the best metallic material, resulting in the Titanium, of long duration, acceptable lightness and extraordinary hardness. Without a doubt, the result may be longer than our own lives …
For the construction of titanium bodies, we first acquire Titanium plate choosing the most pure Titanium possible, the most common and that in this case was used is grade 2 with a composition of 0.07 O2-0.10 Fe, the which has a good mechanization. Titanium and its alloys are already firmly established as materials for the construction of aircraft and the aeronautical industry, also in the chemical and petrochemical industry, currently in constructions for tanks, dryers, reactors in the chemical and bleaching industries, large exchangers of tubular and plate heat, pumps, valves, heating coils, gas cleaning equipment and equipment specialized in the production of nuclear fuel elements. On the other hand Titanium is resistant to the corrosion of most electrolyte solutions in metal finishing processes. Titanium coils, Titanium coated immersion heaters and Titanium tubular heat exchangers are used to heat chromium and nickel plating solutions. Titanium is also used in anodizing frames for its electrochemical properties. The adaptation and lack of rejection of Titanium to the human body are so good that it is being used for a wide variety of surgical implants. Its use in oral implants is also very booming.
More features are described in this provider:
For this chromatic construction we have not opted for a sheet of 12 millimeters high and milling the upper and lower channels as usual and previously we have done, this time, we made three separate pieces that will later be joined in the body of the harmonica. We start with a sheet of 6 millimeters and another one of 1 millimeters that will be the one that performs the function of dividing partition between the two superior and inferior.
The 6 mm sheet is cut with our own designs through a current process of cutting with water and directed by numerical control by http://www.precisiondecorte.com which guarantees a perfect cut, free of burrs and without subjection to high temperatures.
Although this material has great and positive characteristics as its reduced oxidation, these bodies have received a surface treatment in the form of a coating of Titanium Nitride, with its peculiar yellow-gold color, a procedure by which additional characteristics are offered to the surfaces that are applied. This coating is widely known and used in the industrial sector for the improvement of the parts that are treated with this treatment. Chip cutting tools are well known with these types of coatings, molds for die-cutting, medical implants, etc …
This modern procedure and material is accepted for the alimentary use, option for which it was chosen, next the document with the certificate of authorization of use of this coating for the food industry is attached.
Document PDF: Certificado TiN 308K
This guarantees that the external aspect will have a duration theoretically superior to the use that will be used in these bodies of harmonics and possibly survive the generation of which here writes this document. This process provides material as we know before with all the wide range of coatings, 3 microns form the standard measure, on which any doubt of sealing between the union of the pieces is resolved with the seal of the interior joints with the contribution of this material by coating. All this information can be expanded by visiting the website of the company that offers these coating services:
Titanium can also receive a surface treatment in the form of anodized, a method also used in decorative pieces, medical, jewelry, etc …