SU1699782A1 - Method of making gems of arbitrary shape - Google Patents

Abstract

The invention relates to the technology of jewelry production, in particular to the technology of making jewel-cut gemstones. The purpose of the invention is to increase productivity. In the method between the operations of turning and cutting, the distance from the axis of rotation of the blank holder to its surface is measured at points corresponding to the projections of the centers of the future faces of the top 1l of the bottom stone, and further processing is carried out taking into account the corresponding corrections for aper - ha and bottom. 1 il.

Description

The invention relates to the technology of jewelry production, in particular to the technology of making jewel-cut gemstones.

The aim of the invention is to increase productivity.

A method of making diamonds of arbitrary shape includes turning the workpiece to form a girdle, determining the location of future faces, fixing the workpiece in the holder, grinding and polishing the bottom and top faces. After fixing the workpiece in the holder, the distance from the axis of rotation of the holder to the surface of the workpiece is measured at points corresponding to the projections of the centers of future faces, and the processing is carried out taking into account corrections to specified angular parameters related to the results of measurements made by the following ratios:

when processing top to, arctg r (Ripac4-roi) xtgaip..4l

HRi - roi

(L

WITH

when processing the bottom

D # / b | calc - arctg Rlpac4Xtg / lpac4

K |

where i is the face number,

cti - the specified value of the angle of inclination of the 1st face of the top;

 - the specified value of the angle of inclination of the 1st face of the bottom,

I | calc set value is the distance from the axis of rotation of the holder to the surface of the workpiece at points corresponding to the projections of the centers of future faces on the surface of the workpiece;

Os Yu ChE X |

00

Yu

Ri is the measured value of the distance from the axis of rotation of the holder to the surface of the workpiece at points corresponding to the projections of the center of the 1st face;

This is the distance from the axis of rotation of the workpiece to the calculated point of intersection of the 1st face of the top and platform.

The drawing shows a diamond, the cross section along the axis of symmetry,

Using the specified values, we prove the validity of the proposed amendment formulas.

The main points of the section are denoted by the letters A, B, C, D, K, L and M, then AB B | calc; , LABL aipac4; LACL Oi; ABD / 3ipac4, l-ACD f}, LM - section height.

Then for the top

MB AB -AM H | calc-roi, Yes "paradise - as elracci - arctg

LM MC

.. “„ Mwhaara.

 szrasch - arctg

 (RlpacH - Г0 |) X tg

R | Toi

for the bottom

dts 1d $ rgsch;

diamonds, does not require high accuracy in the formation of ska and thus eliminates the use of the method of successive approximations (on

operations turning the workpiece), which significantly increases the yield in the manufacture of diamonds. Corrections can be obtained after the operator makes measurements from the table-nomogram, compiled on the basis of the proposed method. It also eliminates the need to use highly skilled workers in these operations.

Claims (1)

Invention Formula A method of manufacturing arbitrary-shaped brilliants, including turning the workpiece to form a girdle, determining the location of future faces, fixing the workpiece in the holder and further processing by grinding and polishing the bottom and top faces, characterized in that, in order to improve performance, after fixing the workpiece in the holder, distance from the axis of rotation of the holder to the surface of the workpiece at the points corresponding to the projections of the centers of future faces, and the processing is carried out taking into account corrections from the rear these angular parameters related to the results of measurements made by the ratio when machining the top ДП35 п „(RipacH - r0 |) X tpttipacM 1 A / - /, /, - /, ogtl A -D SI SCHrascch - arctg hr-L-EL, Lr - pipacM pi - P1raskch arCtg - - JR | -r0i  Arasch-aksgdMZhYRЈЈ Ki Drain - arctg Rlpac4 tg pIpacM Ri Example. Let it be necessary to make a jewelry inset with a diamond type of facet Cr-57 (round). Specified (calculated) insertion parameters in the i-th section: Ripac4 2,50 mm, OaRasch 33 °, / 3 | calc 41 °, 50 MM. Let the result of the measurement receive, 53 mm. Calculate the correction for processing but calculated formulas: Des 0.49 ° -0 ° 30; D $ 0.34 ° -0 ° 20 ( As a result, there is no need for periodic visual inspection when processing the workpiece, which increases the productivity of the manufacturing process. 40 when processing the bottom D # /, calc - arctg R W Xtgflp.cM n | five 0 five where i is the face number; СЈ | calc the specified value of the angle of inclination of the 1st face of the top; Drasch set value of the angle of inclination of the 1st face of the bottom; Ripac4 is the specified value of the distance from the axis of rotation of the holder to the surface of the workpiece at points corresponding to the projections of the centers of future faces on the surface of the workpiece; RI is the measured value of the distance from the axis of rotation of the holder to the surface of the workpiece at points corresponding to the projections of the center of the 1st face; r0 | - distance from the axis of rotation of the workpiece to the calculated point of intersection of the 1st face of the top and platform.