FR2649032A1 - AUTOMATIC MACHINE FOR MILLING, PROFILING AND BEVELING SIMULTANEOUSLY PAIRS OF GLASSES IN ORGANIC MATERIAL FOR EYEGLASSES - Google Patents

Abstract

Automatic machine for milling, profiling and bevelling glasses made of organic material for spectacles characterized by the fact that it has a mobile group formed of a main shaft 3, two pairs of opposite half-shafts 6 and 7 and a shaft jig holder and in which this jig, which acts on a feeler 5 turns by causing the displacement of said half-shafts 6 and 7 which hold two glasses according to the shape of the jig and symmetrically with respect to the latter. At the end of the machining, the glass holder arms pivot, deposit the machined glasses and pick up the new glasses to be machined.

Description

AUTOMATIC MACHINE FOR MILLING, PROFILING AND

  SIMULAR BEVELING PAIRS OF GLASSES

ORGANIC MATERIAL FOR EYEGLASSES

  1 Machines for working glass in organic material with a ra-

  dial currently on the market gauge and bevel, in a single operation, a single glass using a probe which follows a template. For

  obtain two symmetrical glasses, two different machining operations must be carried out

  annuities; we first carry out the machining of all the glasses of the same side, we replace or turn the template, then we carry out the machining on the

  other glasses. In addition, current machines are limited in the cooling

  wise of some very angular profiles, and they do not reproduce faithfully

  Lely l1 profile of the template which is mounted as creator.

  To overcome these drawbacks, a new machine was studied and produced, which simultaneously performs the machining of the two glasses, right and left, with the possibility of making very small angles. The machine is equipped with a device capable of slightly correcting the profile of the

  glass according to the mounting requirements on the glasses.

  The machine is equipped with a base supporting a main shaft to which are connected two interior half-shafts placed orthogonally to the main shaft. The main shaft has a rotational movement,

  back and forth 90 degrees on its central axis. This rotational movement

  tion causes the two interior half-shafts to move

  which are placed near the chargers. To the two half-trees

  two other half-trees, opposite, are opposite.

  The two outer half-shafts, actuated by a pneumatic cylinder,

  imprison, by closing on the interior half-trees, the two ver-

  res that are on the loader and the rotation of the main shaft

  begins who approaches the glasses to machine the strawberry. The tree carrier

  gauge starts to turn, actuated by a geared motor, to which are

  also connected, with the same speed thanks to a belt movement

  tée, the interior half-shafts holding the glasses which rotate and move at the same speed and with the same amplitude. The template, moved by a pneumatic cylinder, comes into contact with a probe. The very movement of the template on the probe is reproduced by the glasses on the cutter which, by its action, gives the glasses the same shape as

template.

  At the end of the profiling of the glasses, the main shaft turns, the two

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  external half-shafts close near the charger, trap the two glasses and a new machining phase begins. The probe has a cylindrical shape with a diameter equal to the cutter, it is mounted on a ball bearing slide whose displacement travel is braked by a calibratable hydraulic damper; the probe can be mounted on its transverse axis by unlocking a lever, in order to thus modify

  at will the profile of the glasses to be obtained according to the requirements.

  The probe stroke can be adjusted using the adjusting screw

  so that, with the displacement of the probe, it is possible to increase or decrease

  determine the diameter of the machined glasses.

  By way of nonlimiting example, a practical embodiment of the invention is illustrated.

  Figure i shows a diagram of the machine where we can see (1) the gaba-

  laughs in the shape of a glass supported by the glass holder shaft (lb) that the motor (2)

  turn. The main shaft (3) contains a belt (4) connecting the

  bre (lb) with half-trees (6a, 6b). The rotation of the template which acts on the probe (5) causes the moving group formed by the shaft (1b), the main shaft (3), the interior (6) and exterior (7) half-shafts to move. retain the glasses to be machined. The milling glasses indicated by the

  dotted line (X1, X2) are retained by the half-shafts (6 and 7). The half

  outer shafts (7) are crazy, and are actuated by the piston (8), they -

  move by opening and closing; the inner half-shafts (6) connected to the motor (2) via the belt (4) rotate the glasses. By the movement of the group regulated by the lower template, the

  glasses are carried on two strawberries placed at a distance from the center of ro-

  tation of the shaft (3) equal to the radius of curvature of the glasses. The strawberries (9) act on the glasses by milling and bevelling them. The glasses

  being obtained opposite, they will be symmetrical, that is to say that one obtains-

  dra two glasses equal to the template for the shape of the perimeter but symmetrical,

  of which right and left. The motor for the cutters is indicated by (10).

  adjustable by the screw (11). The probe (5) can be adjusted and is equipped with a shock absorber to attenuate the impact of the template which rests on the probe and begins to rotate as the probe moves. The damper can be adjusted so that the template first turns one turn or less than one turn to trim, then the probe moves back while the template turns

for finishing.

  Figure 2 shows the machine seen from above; we indicate by (Xa, Xb) the glasses, by (9a, 9b) the strawberries. A piston drives the rotation of the shaft (3) which, once the glasses have been machined, is rotated by around 90 - 3 - I to accommodate the new glasses. The outer half trees (7a, 7b)

  carry out a translational movement when opening, with the fall

  cut machined glasses, then the new glasses are collected in the charger, the outer half-shafts (7a, 7b) closing towards the inner half-shafts (6a, 6b). The machine automatically donates all the machining of organic glasses. Two glasses are worked simultaneously, a right and a left, and are loaded, worked, unloaded automatically with a

  production of hundreds of parts per hour. These schematic modalities suffice

  made to an expert person to carry out the invention; therefore, in a concrete application, we may have variants without this

  undermines the substance of the innovative concept.

  Thus, with reference to the above description and to the accompanying drawings,

the following are expressed.

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Claims (6)

  1) automatic machine for milling, profiling and beveling glasses made of organic material for glasses, characterized in that it has a movable group formed by a main shaft (3), two pairs of opposite half-shafts (6 and 7) and of a template shaft and in which this template, which acts on a fixed probe (5), rotates by causing the displacement of said half-shafts (6 and 7) which hold two glasses according to the shape of the template and symmetrically compared to the latter. At the end of the machining, the cup arms pivot, deposit   the machined glasses and collect the new glasses to be machined.   2) automatic machine as described in the preceding claim, characterized in that the diameter of the probe (5)   is identical to the diameter of the cutters (9).   3) automatic machine as described in claim 1, characterized in that it has only one probe (5) on which acts a single template (1) which, by turning, causes the movement of a movable group on which are fixed two glasses pivoting to the   same speed as the template (1) and where these glasses are placed diametrically-   relative to the axis of rotation of the main shaft (3), at a   distance equal to the radius of curvature of the glass.   4) automatic machine as described in the preceding claim characterized in that the distance of the cutters (9)   and glasses to the axis of rotation of the main shaft (3) is adjustable.   ) automatic machine as described in points 1, 2, 3, 4, characterized in that the probe (5) is adjustable and is equipped with a shock absorber to attenuate the initial impact of the template   (1) which rests on the probe (5).   6) automatic machine as described in the claims   previous characterized in that the position of the probe (5) can be adjusted using an adjusting screw so that, thanks to the movement of the probe (5), one can increase or decrease the diameter of the machined glasses.   7) automatic machine, as described in the claims   previous, characterized by the fact that the main group, at the end of the machining of the glasses, pivots by detaching the glasses from the strawberries (9), that the half-shafts (6 and 7) move away from one of the other by abandoning the machined glasses and take, when they arrived -5- on the charger, two other glasses which are retained by the two ends of the half-shafts (6 and 7), and finally by the fact that the group main rotates in the opposite direction to the previous rotation by bringing the template against the probe (5) and the glasses in contact with the cutters (9). 8) automatic machine as described in all   previous claims, characterized in that its manufacture,   its marketing is understood to be protected by this industrial invention patent, all as described and illustrated for specific goals.