SU1759607A1 - Machine for polishing holes in diamond dies with polishing string - Google Patents

Abstract

The invention can be used in mechanical engineering and metallurgy, in particular in the field of grinding of fiber channels. The essence of the invention is that the machine is equipped with two spindles for winding and winding the thread, and the unit for relative movement of the thread and the die is made in the form of a hinged parallelogram, two parallel links are placed with the possibility of swinging and contact with the thread and kine. mathematically connected with the drive of this swing, with a winding spindle mounted on one of the links of the parallelogram, and a spindle winding thread on the other. 3 il.

Description

The invention relates to devices for machining holes of small diameter, mainly for grinding drawing leads in drawing tracts, and can be used in mechanical engineering and metallurgy.

A known method of treating the inner surface of the fiber with the help of a tensioned metal thread that oscillates relative to the rotating die.

There are various designs of machines for the implementation of this method.

In particular, the known machine mod. NI-AC-8 in which the polishing of the hole in the fiber is carried out by means of a wire passed through it, the ends of which are fixed in the upper and lower grippers mounted on the machine body. The processed fibers are mounted on rotating fiber holders mounted on a carriage receiving oscillating and reciprocating oscillating movement through the lever-cam mechanism and gearing system.

The disadvantage of this machine is the complexity of its kinematics and the absence of a device for adjusting the tension of the wire, as a result of which the required quality and processing performance are not ensured.

This drawback is deprived of the mod machine selected as a prototype. DR-I by Jos. Urbanek (FRG) In this machine, in addition to the mechanisms that provide the reciprocating, rotational and swinging movements of the fiber holder, the polishing wire is tensioned with an adjustable force by means of a special ratchet device attached to the machine body,

The disadvantage of this machine, in turn, is that the contact of the polishing thread with the treated fiber in its working area always takes place on one side of its profile, which determines its increased wear and.

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As a consequence, the loss of production and the deterioration of the quality of processing.

The aim of the invention is to improve the quality of processing and productivity of the machine by introducing new sections of metal yarn into the treatment area by ensuring the continuous movement of the wire relative to the die being processed.

The goal is achieved due to the fact that the machine is equipped with winding and coiling devices, each of which is rigidly connected to one of the two parallel levers of the hinge-lever system, kinematically connected with a reciprocating drive, for example, a cam.

Due to this design, during the operation of the machine, simultaneously with the oscillation of the metal thread and the rotation of the die, continuous movement of the polishing thread relative to the die is carried out, which ensures uniform wear and, therefore, improves the cutting conditions.

FIG. 1 shows the proposed machine, FIG. 2 is a section A-A in FIG. one; in fig. 3 is a view B in FIG. 2

The machine is made as follows.

In the housing 1 on the hinges 2 a lever parallelogram 3 is installed with parallel levers 4 and 5, as well as a turntable 6 with a fiber holder 7 connected to the drive 8 of rotation of the die 9.

Through the die hole, a metal thread 10 is passed through, fixed at one end to the spindle of winding 11 mounted on the brake motor

12, and the other end on the spindle winding

13, coupled to an electric motor 14.

Electric motors 12 and 14 are connected by means of brackets 15 with levers 4 and 5, respectively.

The lower lever 5 through the spring 16 is preloaded to the fist 17, driven by an adjustable electric motor (not shown in the drawing).

The machine may be composed of several units for processing a larger number of fibers.

The machine works as follows.

The drive 8 is turned on the die and set on the fiber holder 7 fiber 9, after which, depending on which part of the die hole is processed,

turn platform 6 to a lower angle, which can vary from 0 to 45 °,

The end of the metal yarn 10 wound on the spindle of the winding 11 is tucked into

the die hole and secure it to the spindle winding 13.

By adjusting the braking torque of the electric motor 12, the required tension force of the metal thread is set.

Then turn on the motor

(not shown) fist rotation

17, setting the pre-required

rotation speed. At the same hinge

parallelogram 3 begins to oscillate with

by the required frequency, by moving the metal thread 10 relative to the rotating die 9, in which a diamond paste has already been applied to the opening.

Include electric motors 12 and 14, and

the thread begins, at the same time as oscillation, to rewind from spindle 11 to spindle 12.

Thanks to this, new sections of the thread are constantly involved in the work, cutting conditions are improved,

Claims (1)

performance and quality of processing. The invention The machine for polishing thread holes in the diamond filaments, made in the shape of a rotary holder installed in the housing with its rotation drive, a unit for relative movement of the thread and a die with the drive for this movement, in order to improve the quality and productivity of processing, the machine is additionally equipped with two spindles for winding and winding the thread , and the unit of relative movement of the thread and the dies is made in the form of a hinged a parallelogram, two parallel links of which are placed with the possibility of swing and contact with the thread and are kinematically connected with the drive of this swing, with a spindle of winding installed on one of the links of the hinged parallelogram, and a spindle of winding on the other. TO n D P B 0wtf $ - & P .d -Ј: P p you 7 S 13 one eU Fig 2 Type B. Fzg.3