SU422574A1 - DEVICE FOR REINFORCING RING RING - Google Patents

Description

one

The invention relates to the processing of metals.

A device for adjusting the end of the annular groove is provided by a split tubular starter with segments mounted on a rotating mandrel and moving under the action of centrifugal forces.

The proposed device allows to obtain, as a result of finishing, the surface of the end face of an annular groove with high flatness, without steps, it is easy and quick to replace a worn lap, creates a constant, within the weight of the lap itself, the pressure of lapping. This is achieved by the fact that the device is equipped with an eccentric mounted on the spindle and interacting with one of the segments through the ball, and the eccentric is oriented from the condition that ensures the movement of this segment to the axis of rotation under the action of centrifugal force.

The spindle of the device is made in the form of a tube, inside which the mandrel is movably mounted in the axial direction and connected to it via a non-rotating rod bearing.

FIG. 1 shows the proposed device when the lap is worn to the maximum and is in the lower position; in fig. 2 shows a machining part, for example a fixed blade of an electric razor, in a section; in fig.

2

3 is a section along the line A-A of FIG. one; pas figs. 4 is a section along BB in FIG. one; pas figs. 5 is a section along BB in FIG. one; in fig. 6 shows a section along YY in FIG. one; in fig. 7 is a section but DD in FIG. 3

The device contains: a PT case 1 with a drive, the torque from which through the belt 2 is transmitted to the pulley 3 and through the key 4 to the spindle 5, inside of which the ground is located, represented by a junction, which is a pipe cut along the axis pa. The outer diameter of the pipe-guide (before it is cut) is less than the diameter di of the finished surface, and its inner diameter is larger than the diameter dz of the same surface.

There is an annular recess in the upper end of the pre-pipe workpiece that connects the starter segments to the collar of the mandrel 8,

having a reciprocal ring undercut. The mandrel has an outer diameter equal to the diameter of the hole in the plaster, and through the under-shaft 9, fixed by the pin 10 and the spring ring 11. is connected with the non-iodine

Ster: it 12, which is directed by the sleeve 13 and, together with the latter, is fixed against rotation relative to the bracket 14 connected to the housing with the pin 15 of the pin, which enters into the corresponding grooves on the bracket and the rod.

A spindle made in the form of a pipe and having two diametrically opposed keyways with windows in the middle on the inner surface along its entire length is mounted on bearings 16 in the housing and secured by a washer 17 and a nut 18. Inset grooves 19 are inserted into the grooves (Fig. 3) whose length is equal to the length of the spindle. The tabs transfer torque from the spindle to the mandrel and the lap segments at any length.

The workpiece 20 is centered on the finger 21, rests on the collar 22 of the finger and is fixed against rotation by finger 23.

In the lower part of the pinch, on its collar, an eccentric 24 is installed with the center of mass shifted in the direction of the keyway and with a hole diameter greater than the collar diameter. The torque from the spindle to the eccentric is transmitted by means of the key 25. Diametrically opposite to the key in the stepped hole of the spindle is mounted a ball 26 acting on one of the segments of the lap. Casing 27 encloses rotating parts.

During operation, during rotation of the spindle, the centrifugal force of the segment tends to press it against the outer diameter rfj of the machined annular groove in the part. The other segment is affected, besides, by the centrifugal force of the eccentric, which exceeds the centrifugal force of the segment and acts in the opposite direction, forcing it to press against the inner diameter d-i of the adjusted annular canapun in the part. This ensures the processing of grooves without steps at its inner and outer diameters. Obtaining a certain thickness of the bottom of the groove groove with OLT, the same and the same finishing time and the same initial thickness of the groove is ensured by the fact that the weight of the fixed rod, the mandrel with bearing and

the lap itself. The lapping weight varies slightly when it is worn, and this change does not affect the material removal rate from the workpiece per unit of time.

The change of machined parts occurs when the priter is raised, both when rotating and at a fixed spindle. When replacing lap-ups, the sleeve, rod and mandrel together with lap-ups lift up and out of the device.

Subject invention

Claims (2)

1. A device for finishing the end of the ring groove, for example, a fixed knife of an electric razor with a split tubular starter, the segments of which are fixed on the mandrel with the possibility of movement under the action of centrifugal forces, characterized in that, in order to ensure the quality of processing, it is equipped with an eccentric mounted on the spindle and interacting with one of the segments of the lap through the ball, and the eccentric is oriented from the conditions for ensuring that the node segment is moved by the action of centrifugal force. 2. A device according to claim 1, characterized in that, in order to facilitate the change of priter, its spindle is made in the form of a pipe, inside which the mandrel is movably installed in the axial direction and connected to it via a nevrap1 bearing, a recurring rod. Rig.2 f (-A PuZ 3 Fig