RU2040033C1 - Dial and method of making it - Google Patents

Abstract

FIELD: timepiece production. SUBSTANCE: method of making a dial comprises steps of separate production (with subsequent joining) of indicator plate and a base with members for securing it to the plate; blanking a contour of the part and simultaneously blanking through separate recesses for parts of the mechanism, being protruded, namely: point assembly, a drive pinion and a bushon; using a protofilm as the indicator plate and using as the base of the dial a thin metallic strip with thickness 0.3 mm. Using of the photofilm, closing small openings for the protruded parts of the point assembly, allows to lower degree of surface finish of the and to enlarge a range of dials. EFFECT: simplified manufacturing process. 3 cl, 2 dwg

Description

 The invention relates to watch production.

 Known dials made in the form of a metal plate with a central hole with indication signs on the front side, legs and recesses for the protruding parts of the clockwork on the back side (see S.V. Tarasov. Technology of watchmaking. M. Mashgiz, 1963, p. 362-363).

 Known and described there are methods of manufacturing these dials, including cutting the contour and the central hole, fixing the legs, boring and milling the recesses on the back side under the protruding parts of the clockwork.

 The disadvantage of both the dial itself and the method of its manufacture is the complexity, due to the complexity of performing small (0.2 mm deep) bores and milling on the back of a thin plate (0.45 mm) under the protruding parts of the mechanism, the need for careful finishing of the face of the dial for drawing signs, inadmissibility of burns during welding of legs.

The closest in technical essence is the dial, consisting of an indicator plate and a base with fastening elements to the plate and with a continuous through recess under the protruding parts of the mechanism [1]
A method of manufacturing such a dial includes separate manufacturing with the subsequent connection of the indicator plate and the base with fastening elements to the plate, in which a continuous recess is previously cut simultaneously with the contour for the protruding parts of the clockwork [2]
This dial and the method of manufacturing such a dial exclude laborious milling and boring operations of small grooves on a thin plate of the dial, make it possible to completely manufacture the base of the dial on the stamp, and the notch and contour are cut in one operation. However, this embodiment of the dial does not allow the use of film for the manufacture of the indicator plate due to its sagging, which is due to the presence of a continuous through recess located throughout the central part of the base. The ability to use film for the manufacture of indicator plates is very important in modern production, as it allows you to quickly change the range of dials, expanding the range of watches.

 The aim of the invention is to create a design of the dial, eliminating the sagging of the indicator plate made of film when attaching it to a base made by stamping.

 The goal is achieved by the fact that in the dial, consisting of an indicator plate and a base with fastening elements to the plate, having a through recess for the protruding parts of the clock mechanism, the through recess is made in the form of separate holes: for a switch mechanism, a clockwork tribe and a bush.

 In the proposed method, which includes separate manufacturing with the subsequent connection of the indicator plate and the base with fastening elements to the plate, in which a through recess is previously cut simultaneously with the contour for the protruding parts of the clock mechanism, the difference is that the through recess is cut out in the form of separate holes: switch mechanism, clockwork tribe and bushon.

 In FIG. 1 dial, side view; figure 2 the base of the dial, a view in plan.

 The dial consists of an indicator plate 1, which is attached to the base 2 with glue 3. At the base of the 2 dials, through holes are cut down: 4 for the dial mechanism, 5 for the clockwork tribe and 6 for the bush. Legs 7 are welded to the back of the base 2.

 The proposed method of manufacturing the dial includes the following operations. The blank of the base 1 of the dial is cut along the contour from a tape with a thickness of 0.3 mm simultaneously with holes 4 6 for a switch mechanism, a clockwork tribe and a bush. Then the legs 7 are welded and the indicator plate 1 made by the photographic method is glued. Through holes are made on a stamp, boring and milling are no longer necessary. Making these holes separate eliminates sagging film.

 Thus, the proposed dial and method of its manufacture allow the use of a relatively thin material for the base of the dial and a film with the indication on it as the top plate without changing the overall dimensions of the watch in height. The use of a film covering small openings for the protruding parts of the switch mechanism can reduce the requirements for the cleanliness of the surface treatment of the base. In addition, photo printing allows you to give originality to the external design of the watch and quickly produce and change the range of dials.

Claims (2)

 1. The dial, consisting of rigidly connected base and indicator plate having through central holes, characterized in that several additional through holes are made in the base.  2. A method of manufacturing a dial, including the separate manufacture of the indicator plate and the base of the necessary contour with the implementation of the Central coaxial through holes, rigid connection, characterized in that the base has several additional through holes, all through holes in the base and its circuit at the same time through cutting down.

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