SU114937A1 - A machine for polishing and forming holes by chipping in hard minerals and alloys blanks and parts - Google Patents

Description

The invention relates to machines for polishing and forming holes by chipping in workpieces and parts of solid minerals and vibrating vibrations with an ultrasonic frequency directed along the longitudinal axis of the working body, for example a needle.

In known machines of this kind, vibratory motion is usually transmitted to a working member, which is clamped to the object being processed by an unregulated amount of force, which often leads to breakage of the operating member with small transverse dimensions of the latter and, therefore, such machines do not provide the possibility of producing openings with transverse dimensions up to 0.05 m.m

In the proposed machine, this disadvantage is eliminated by the fact that the vibratory motion with an ultrasonic frequency is imparted to the mandrel with the workpiece or part fixed on it; The mandrel itself is made with sides to hold the abrasive emulsion in an amount sufficient to fully immerse in the workpiece or part being processed, and the working member is pressed against the workpiece or part using a device that ensures the constant amount of force of the organ on the workpiece or part and the ability to adjust this quantities.

FIG. Figure 1 shows the relative position of the working tool and the workpiece or workpiece during the formation of the hole; in fig. 2 - option with an inclined position of the working tool; in fig. 3 - version with an adjustment device for the mandrel.

Around the middle part of the mandrel I intended for fastening the workpiece or workpiece 2, a bead is made in the form of a glass, which holds the abrasive emulsion 4.

A mixture of diamond powder and water can be used as an abrasive emulsion. Abrasive emulsion in the glass 3 should be so much so that the workpiece or the workpiece was immersed in it completely.

LI 114937-- 2 — A working tool, such as a needle 5, is pressed against the workpiece or workpiece 2 by means of an electromagnet 6. A rod 7 with a chassis 8 at the end for attaching the needle 5 is the core of an electromagnet and under the influence of a constant electric current flowing through the electromagnet coils, moves and presses the working body to the workpiece with a force proportional to the strength of the current.

Such a biasing device ensures that the pressure of the worker on the part is constant.

Changing with one of the well-known devices, such as a rheostat, the amperage in the coils of an electromagnet, you can smoothly and very accurately adjust the magnitude of the pressing force of the working body on the workpiece or part.

For slotting the hole, the I / I, and together with it and the part or workpiece fixed on it, impart a vibratory motion with an ultrasonic oscillation frequency. The supply of the working body while providing an electromagnet 6.

The constancy of a given pressing force, as well as the fact that the mandrel vibrates, and not the needle, makes it possible to use, without fear of breakage, a working body with very small transverse dimensions, which allows to form holes up to 0.05 mm by chipping.

During operation of the machine, the solid particles of the abrasive emulsion are maintained in a state suspended in water by bubbling the air supplied to the cup 3 through the tube 9 from the air pump (not shown).

To adjust the mutual position of the working body, for example, needle 5, and the workpiece or workpiece 2, the mandrel / is fixed on the vibrating base 10 by means of springs // and adjusting screws 12.

Subject invention

Claims (2)

1. A polishing machine and the formation of holes by chipping in workpieces and parts of solid minerals and alloys using vibrations with an ultrasonic frequency directed along the longitudinal axis of the working body, such as a needle, characterized in that for the purpose of polishing or forming in workpieces and parts x holes with transverse dimensions of up to 0.05 mm and in order to reduce the possibility of breakage of the working body, the vibratory movement with an ultrasonic frequency is attached to the mandrel with the workpiece or part fastened on it, the mandrel itself is the board with the sides to hold the abrasive emulsion in an amount sufficient to fully immerse the workpiece or part into it, and the working body is pressed against the workpiece or part with the help of a device ensuring the constant force of pressing the body on the workpiece or part and the possibility of adjusting this value. 2. The form of the machine according to claim 1, characterized in that the device ensuring the constant pressing force of the working body on the workpiece or part and the possibility of adjusting this value is made in the form of an electromagnet whose core is a collet with a collet for holding the working body and the regulation of the force of the working body pressure on the workpiece or part is achieved by varying the strength of the current passing through the electromagnet coils. g G 7