SU41373A1 - Ball Grinding Machine - Google Patents

Description

The machine is designed primarily for mass grinding of stones made of ornamental stone and glass.

For coarse grinding, a tube fixedly mounted above a horizontal rotating disk was used as a grinding tool; The grinding ball is inserted into the tube and is frictionally rotated by the disk. The tube can be replaced with a disk with holes for balls or special tongs.

For finishing grinding and polishing, a machine with a similar tube is used, which with its end rests loosely on a disk covered in this case with a ring to prevent the tube from dropping.

In the schematic drawing of FIG. 1 shows a section through a coarse grinding machine; FIG. 2 - its top view; FIG. 3-section machine for fine grinding; FIG. 4 view from above; FIG. 5 and b-modified machine.

In the machine of FIG. 1, 2, stones A are placed in metallic or made of abrasive material tubes B, arranged vertically above the rotating horizontal di (390)

skim C. An abrasive material with water or water is continuously or intermittently applied to the disk. The disk serves to drive the stones inside the tubes. Grinding is done on the edge of the tubes. Due to the rapid rotation of the disc covered with an abrasive mixture |. the ball jumps in the fixed tube B and is therefore ground on all sides. After the first operation, stones A are placed in short tubes B (Figs. 3, 4) placed on a rotating disk C. Tubes B are pressed by centrifugal force against the ring and are thereby rotated. Stones during operation of the machine are pressed from above by a fixed disk E. The abrasive material flows continuously or periodically onto the rotating disk C. Grinding and polishing is performed by rubbing the stone against the edge of the tube B. The working surfaces of the 1 E disks can therefore be made of rubber or other elastic friction material.

The tube B in the machine according to FIG. 3, 4 actually lies on the surface of the disk O. To reduce the surface of the friction between the disk C and the tube D on

the latter is made from below with small protrusions that are not shown in the drawings and which are not significant to the work process.

At the direction of the inventors, the described machines are currently working in the Trust “Russian gems” and provide satisfactory products for the mass production of beads.

The machine of FIG. 5 consists of two horizontal disks C and E. The lower disk C is rotated by the drive. Both discs have concentric grooves 3 of the same radius. The upper disk has an opening I for supplying abrasive, to the finger K, whose axis coincides with the axis of rotation of the lower disk, is put on the third disk F with holes located around a circle of the same radius as the grooves 3. Polished balls A are placed in these holes. In order to accelerate grinding, instead of disc D, radially arranged tongs L can be used (Fig. B), the sponges of which are rings or tubes M.

According to the inventors, the described machines are also suitable for grinding very small balls (2-4 mm in diameter from optical glass for further transformation into front lenses (hemispheres) for microscope objectives, as well as for grinding convex lenses, provided that the role of „ The fungus does not play part of the ball, but a full ball

Since at the same time a very large number of small balls can be ground on the machine, the productivity should be many times greater than when grinding small hemispheres one by one on the spindle. With regard to grinding large diameter lenses, the performance of one spindle of the invented machine should

exceed the performance of one spindle of existing automata by at least six times, if you accept

in attention - 1e, that the minimum number of balls simultaneously ground on the machine is three, and the number of lenses stuck on each ball,

twice the number of lenses stuck on one mushroom.

The subject matter of the invention.

Claims (5)

1. A machine for grinding balls, characterized by the use of a fixed-mounted grinding tool in the form of a tube B with an opening for placing a ground ball A in it and a horizontal disk C located under tube B to bring the ball A in a friction way to rotation A (Fig. 1). 2. Machine alteration according to claim 1, characterized in that tube B is not fixed stationary, but lies loosely on disc C, which is enclosed in ring D to prevent tube B from being discarded from disc C with centrifugal force (Fig. 2). 3. Machine alteration according to claim 2, characterized in that instead of tube I, a disk D with sockets for balls is used, and instead of ring D in disk C, an annular recess is made. 4. Machine change according to claim 3, characterized by using instead of disk G radially arranged tongs L, the sponges of which are rings or tubes M. 5. In the machine on PP. 2-4 use of an additional horizontal fJ located above the balls to be machined on top and serving to bring them into rotation by friction. y u author's testimony B. B., Vitovsky and A. V. Shubnykov M 4: 137l-i Phi.1 FigZ g - ... if: ..... I .. 1 -and ,,), .- U .-: - x: Af