SU95284A1 - Multi-spindle machine for lapping engine valves - Google Patents

Description

This invention relates to multi-spindle lapping machines with reciprocating spindles from a crank mechanism.

Compared to sushi, they use machine tools of the kind described below to improve the quality of grinding as a result of successive mixing of the initial angular position of the spindles at each successive turn. To achieve this displacement between the rail and the crank of the drive mechanism, a filled cylinder in which a relatively movable piston connected with a crank is placed, equipped with an automatic one-way dosing valve m.

The drawing shows a kinematic diagram of the drive mechanism of a multi-spindle machine for lapping engine valves.

A set of spindles / machine is driven in reciprocating motion by the rail 2 and the crank mechanism 3 associated with it. Between the rail and the crank

an oil-filled, closed cylinder is inserted, the body 4 of which is rigidly connected to the rail, and the relatively movable norn-hole 5 placed in it through the rod 6 is connected to the crank.

An automatic valve bypass device is placed in the piston, ensuring one-sided metered flow of oil from one cylinder cavity to another for each double stroke of the rail.

The bypass device is designed as a cylindrical spool 7, which is movably mounted in the piston in the direction of the cylinder axis. The spool stands for the piston end planes and is equipped with two oppositely directed ball valves 8 and 9 placed on the open end surfaces of the spool.

For each double stroke of the rail 2, as a result of the expiration of a certain constant volume of oil from one cylinder cavity to another, a one-sided relative displacement of the cylinder and piston occurs, resulting in the initial angular position of the machine spindles.

The presence of two valves in the spool and two outlet channels in the piston and spool provides a periodic change in the direction of oil outflow from one cylinder cavity to another when the piston reaches extreme positions in the cylinder when one of the ends of the spool abuts the end wall of the cylinder and moves in the piston to the opposite half ; en.

In doing so, another pair of spool and piston channels is connected, the opposite valve begins to work, and the oil is bypassed in the opposite direction, causing the corresponding reverse relative mixing of the cylinder and the piston.

In order to protect the spool from arbitrary movements in the intermediate positions of the piston in the cylinder in the piston, a two-position ball retainer 10 interacting with the spool body is placed.

Subject invention

Claims (3)

1. Multi-spindle machine for lapping the valve of the engine. With a crank-pinion drive reciprocating rotation of the spindles, characterized in that, in order to ensure a consistent displacement of the initial angular position of the spindles at Each time they turn, between the rail and the crank of the iris drive mechanism, a oil-filled closed cylinder is inserted rigidly connected to the rail, in which a relatively movable piston connected to the crank is placed, equipped with an automatic one-way dosing valve. 2. The form of the machine but p. 1, characterized in that, in order to periodically change the direction of oil outflow from one cavity of the cylinder to another when the piston reaches the extreme positions in the cylinder, the bypass device is designed as movably mounted in the piston in the direction of the cylinder axis a cylindrical double-sided roundabout protruding beyond the end surfaces of the piston and provided with two oppositely directed ball clans placed on the open end surfaces of the spool. 3. The form of the implementation of the bypass device according to claim 2, characterized in that, in order to protect the spool from arbitrary movement in the intermediate positions of the piston in the cylinder, a two-position ball latch interacting with the spool body is placed in the piston.