DE1240538B - Process for the production of metallic vibrating elements which have a predetermined size of the temperature coefficient of their elastic properties - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

fata-

CZId

IEUTSCHES

PATENT OFFICE

EDITORIAL

German KL: Jfc-1/78

Number. 1240538

File number; V 23584 VI a / 18 c Registration date: January 31, 1963

Ausfeget **: 18. M »1967

The influence of temperature on the elastic shafts of a number of metals and alloys is spatula in technology, preference * "!" When used, materials in "few systems" play a decisive role. Such applications are, for example, mechanical "band filters ia screen circuits, oscillations" wrestling in selective resonance circuits or mechanical resonators as frequency-tuning-coded elements Ia geo-generator components ". For example, the use of cWctrofoochattic filters »offers the following advantages, among others: Dfo CtMe of mechanical oscillating circuits is bctr & chlncb. greater ata that electrical oscillating circuit «. This means that the filter characteristics of mechanical band filters have a large flank structure, which makes them suitable for carrier frequency and scanning band filters. Furthermore, the spatial dimensions of a mechanical resonator, with comparable quality, are less than the dimensions of electrical oscillating circuits. M.

The choice of material used for such mechanical filters can be of various successes. Predominantly the Tcmperaturkocfftzleot the frequency and the Schwrnggötc. If high vibration levels are required, materials such as quartz or magnesium will be used. The disadvantage here, however, is that large quantities of heat are required to achieve low oscillation frequencies, or that, in the case of magnesium, the strong temperature dependence of the ejgeatrequency necessitates the use of a thermo-lethal. B. Nickel-Etsen Legterungen ^ turn. As is well known, this “has opportunities for compensation due to magnetic points, which can lead to a very low temperature resistance and elastic properties”.

The inventive method now relates on the setting of certain small temperature coe / limited elastic properties in Lepertiflfsblechcn.

In this further subject is the invention it is shown that by a suitable choice of the course of the angle dependency of the temperature coefficient of the elastic Eigeotchüften in the Walzcbcoc eiae bctrfichüichc Material savings in Punching or cutting such Lcgkrungsblccbc can be educated.

In the German patent specification $ 33 056 reference is made to the anisotropy of the elastic properties of metal crystals (LL ₁ these properties Process for the production of swinging mechanisms which have a predetermined size of the temperature coefficient of their elastic properties

Applicant:

VacD to melt Limited liability company, Hanau / M ^ Green way 37 Ate inventor named: Dr. rcr. Asked Hermann Franz, Lothar Juag, Hmuu / M.

depend on the krisUllographijchea Rkbtuog, Ia who they become gemeaeo. Eneagt one in sokh If the eifleoi material has a texture, that is how it gets it manufactured workpiece is an anisotropic, d. b., the elastic properties are compared to a reg los oriectüateo material in a certain way from dta Texture directions dependent. It is therefore the subject of German patent 833 056 the anise * tropic of the Ε-module, the torsion module and the cross-contact number of the desired weave.

The crfindungsgcmaBc method based on the fact that the anisotropy of the Tempcrauirkoeifiziectcn Ebetizitauraoduls, the torsion modulus and the QoerkontraktloDizabl is utilized, has been determined as the representative OrSOe for a dynamic stress on the material, the Tempef & tQfkoeJtzient the natural frequency In the following Bcispkka. As is well known, the dependence of the natural frequency is longüudinnkr Eigemchwingupgeo of a vibrator

given, where L is the length of the transducer, B dea B-modal and ρ the density dta material. There is also the known relationship

TK, "

where TK / is the temperature coefficient of the natural frequency, 7Xb is the temperature coefficient of the elastic zMtsmoduls and α dea Lnear expansion coefficient bcKich net.

j « mm

Claims (2)

3 4 For the anisotropy of the temperature coefficient to be clearly seen, the in the first of the natural frequency, let the following first example be maintained give: an alloy with the weight percent and only the alloy concentration changed. 39.55% Ni, 8.56% Mo, 0.86% Mn, 0.25% Si, 0.35 ° / ₀ So shows A b b. 3 with the Be, remainder iron, was processed in the usual way to a tape 5 curve d the course of the temperature coefficient of 5 mm thickness. At this thickness, with an alloy composition of 37.3% Ni, the strip was subjected to a homogenization annealing of 9.0% Mo, 0.4% Mn, 0.4% Si, remainder iron,
Subjected at 1100 ⁰ C and then in water curve e shows the course of the temperature quenched. The strip was cold-worked in one pass with an alloy composition of 20% and finally for 30 minutes with 42.2% Ni, 8.9% Mo, 0.4% Mn, 0.4% Si, the remainder being iron. 500 ⁰ C annealed in a hydrogen atmosphere and the transition to very low frequencies would be cooled in air. From the strip obtained in this way, a quasi-static load on the material was then applied at various angles to the rolling. The above-mentioned utilization of the direction about 70 mm long and 7 to 10 mm wide anisotropy can therefore also be taken from samples of spring materials and the temperature coefficient 15 applied, which are statically stressed (TKf) of the natural frequency determined on them. That like z. B. Leaf springs with a certain temperature result of these measurements is shown in Fig. 1. dependence of the spring force. In the strip processed in this way, the through a certain selection of the cold deformation TK / in the rolling direction is about -2.6 · 10 ~ ^e / ° C, but with one there is also the possibility of the cutting angle of about 15 ° to the rolling direction is to keep the TKf 20 losses small. Esseida heart. B. assumed equal to zero and at even greater angles to the rolling that vibrating plates with the temperature coefficient positive. A sample that would ultimately be required to be perpendicular, cient TKf = +1.2 · 10 ~ ^{e / ° C.} Furthermore, ie at an angle of 90 ° to the rolling direction, it may be prescribed that such a vibrator is removed from the strip, has a TKf of length / and should have width b . From A b b. 2 +2.0 x 10 ~ ⁶ / ° C. . 25 one can see for this example that the This anisotropy of the temperature coefficient results in the desired temperature coefficient of + 1.2 · 10 ~ ⁶ / ° C therefore enables the setting to be very specific according to the different cold deformation TKf values in vibrating elements by placing them at angles of 10, 18, 22 and 90 ° to the WaIz- occurs at a suitable angle to the rolling direction. Therefore, if there is an alloy band ρ punched or cut. 30 with the width / in front, as in A b b. 4 schematically In a second example it is shown that the becomes clear, that according to the above example a 70% Angular dependence of the temperature coefficient of cold deformation has been obtained, so the required Natural frequency (TK /) changes with cold deformation. Oscillator S loss-free at an angle g of 90 ° All the starting conditions for the rolling direction were taken from here. On the other hand, the first example would have been maintained only with the 35 as in A b b. Assuming 5, only one alloy exception, that the strips with several stitches strips with the same width /, but with different sizes of a 50 or 70% 20% cold deformation, then cold deformation would now have to be subjected. From these the desired oscillators S at an angle A strips, samples were also taken at a certain angle of 18 ° to the rolling direction. An angle to the rolling direction is taken and the simple approximate observation shows that this is determined in the respective TKf. The result is shown in A b b. 2 of the entire required band area kl mn shows a section through the curves «, b and c . loss ν of about 40% occurs. Also a possible one Curve α gives the dependence of the TKf on the angle of the second type of cutting or punching, as they do to the rolling direction again if the specimen is one indicated by the dashed lines within the area Had experienced 20% total cold deformation. 45 n'm'l'k can be assumed, shows that the Curve b corresponds to vibrating elements from bands, vibrator S ' or S only with the considerable which were cold-deformed by a total of 50%, and cutting loss v 'can be seen. Curve c corresponds to vibrating elements made of strips. It is therefore surprisingly found that which were cold deformed by a total of 70%. the loss of cuts due to cold deformation This different course of the anisotropy 50 can be influenced. However, from this one can therefore use a further teaching in order to take the TKf into consideration, visibly its absolute value as well as namely that the cold deformation should expediently be guided by the magnitude of the cold deformation with the sign that to vary one and the same TKf advantageous steps. So z. B. a sheet with the composition specified at at least two angles to the rolling direction in Example 1, which occurs 55. at an angle of 10 ° to the rolling direction.
was taken, according to A b b. 2 a TKf of about -1.3 * 10- ^e / ° C or from +0.15 · 10 ~ ^e / ^o C or from 1. Process for the production ^{of vibrations have about + 1.2 «10 ~ e} / ° C, depending on whether the elements that have been cold worked a predetermined size of the material 20, 50 or 70%. Having a temperature coefficient of elastic properties such as that of selecting the temperature shaft, which is characterized by coefficients, is therefore particularly advantageous if it is not possible that in strips or sheets made of alloy, on the other hand, oscillators with extremely small temperature values of about
coefficients are required and on the other hand 36 to 44% Ni,
Assemblies are to be matched to a TKf = 0. 65 4 to 10% Mon, The temperature coefficient can also be 0.3 to 1% beryllium a corresponding change in the alloy composition and additions of Cr, Cu, Co, Mn and Si composition can be influenced. In order to reduce this influence to a maximum of 2%, the remainder being iron, which are annealed at temperatures of about 1100 ⁰ C and then quenched, the anisotropy of the temperature coefficient of the elastic properties as a function of the angle to the rolling direction of the alloy strip or sheet is varied by the alloy strips or sheets are cold-formed in such a way that a Different numbers of roller passes of different sizes and in different order are applied. 2. The method according to claim 1, characterized in that an alloy strip for the the dependence of the temperature coefficient of the elastic properties on the rolling direction of the tape has previously been determined, the vibrating element at such an angle to Rolling direction of the strip in the form of punching 10 or sectional parts it is taken that in these parts the temperature coefficient of the elastic properties has a desired value lying between the limits of the previously determined range. 3. The method according to claims 1 and 2, characterized in that in the production of Vibrating elements made of metal or alloy strips reduce the anisotropy of the temperature coefficient the elastic properties are used in such a way that the cutting losses are low stay. Considered publications:
G.Wassermann and J.Grewen, "Texturen Metallischer Werkstoffe", 2nd edition, Springer-Verlag, Berlin, 1962, p. 567. For this purpose 2 sheets of drawings 709 580/177 5.67 © Bundesdruckerei Berlin