SU446387A1 - Pneumatic boring machine - Google Patents

Description

The invention relates to the field of machine tools and can be used in machine tools for boring sliding bearings.

Universal boring machines send a pneumatic bearing mounting mechanism mounted on a caliper, a spreading mechanism and a mechanism mounted under them for collecting and briquetting a trickle with a pneumatic cylinder. The cylinders of the mechanisms are connected to a spool switch made in two positions, the ears of which are alternately informed of the source of pressure and the atmosphere. In such machines, an increased consumption of compressed air is observed, since air is separately supplied to each cischdr and released from them into the atmosphere,

The purpose of the invention is to reduce the consumption of compressed air by re-using it in cylinders. This is achieved by the fact that the pneumatic cylinders of the bearing attachment mechanism communicate with the pneumatic cylinder of the chip briquetting mechanism in an intermediate position.

0 spool switch channel, performed in the spool.

Fig, I schematically shows the proposed pneumatically driven boring machine; FIG. 2 shows the connection of the spool switch channels in one position. Pneumatic actuator contains

cylinders I of the fastening mechanism and cylinder 2 of the chip collecting and briquetting mechanism. The cylinders of the mechanisms are connected to the spool switch 3, the channels a and b of which they are alternately connected to the pressure source and the atmosphere. In the spool there is a channel in which the cylinders 2 and I communicate between the coidoH, in the intermediate position of the switch, the pneumatic actuator to the source of the reyoj is connected to the disconnecting valve 4,

For the automatic mounting of the bearing, the switch 3 is set to a position where compressed air passes through the channel A to the cylinders I and the bearing is fixed by a mechanism (not shown in the figures). After the bearing is bored, the switch is moved to an intermediate position, in which channel B communicates cylinders I and 2 between themselves and air from cylinders I enters cylinder 2, and channels a and b separate cylinders I with a pressure source and cylinder 2 with the atomosphere.

In the subsequent transfer of the switch (shown in Fig. 1 by the dotted line), cylinder 2 is connected by a channel a with a pressure source, and I is connected to a channel b with an atmosphere. The remaining air is released from cylinders I, the bearing is released, and the portion of shavings from the bored bearing is pressed.

When installing a new bearing, the switch returns to

initial position. In this case, in the intermediate position, cylinder 2 is connected by channel a with cylinders i and injects air into them, and then, in its initial position, cylinder I is in communication with a pressure source, and cylinder 2 is atmospheric

A machine with such a drive is more economical, since a significant proportion of air is reused. The pneumatic drive of the machine is particularly effective, which is included in the automatic conveyor line for the repair of slide bearings.

PRELNOUT INVENTIONS

A pneumatic actuator of a boring machine, the pneumatic cylinders of which are connected to a pressure source and the atmosphere through a spool switch, characterized in that, in order to reduce compressed air consumption, the pneumatic cylinders are interconnected in the intermediate position of the spool switch by a channel in the spool switch.

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