SU86115A2 - Tool for automatic feeding of the workpiece in horizontal drilling machines - Google Patents

Description

BASIC Auth. St. No. 60108 describes a device for automatically feeding a workpiece in horizontal drilling machines using a work clamping workpiece, which are composed of two independent parts that serve to receive the workpiece between them, clamp it and feed them to the drills. These parts are provided on top with a locking device for the workpiece, and on the bottom with a rotatable bottom for withdrawing it after processing.

In the device, the front part of the sled is under the action of springs and adjustable stops and carries squares setting for the workpiece, as well as new rotating latches interacting with the stops on the box of the shop for blanks. The rear part is provided with a rotatable bottom, controlled by rods by means of rack gears and springs, as well as processes with ratchets to act through the ratchet and rail on the supply of new billet to the slide after they have already been processed.

The device uses a mechanism for controlling the movement of the sled, which has a fist-lever system associated with the rear part of the sled, which carries an axis for acting through rack and pinion gears on the rods interacting with the bottom.

In the development of the device according to the main author's certificate, a device is proposed for use on a milling machine in the manufacture of semi-circular grooves on the sides of the blanks.

A distinctive feature of the described device is the use for these blanks and longitudinal axes of moving a series of spring stops associated with an endless chain conveyor that periodically moves at the start of the slide from the magazine, with blanks through a stop screw acting on the ratchet mechanism included in the transmission to the leading sprocket of the conveyor, into which the shaft is also inserted with the cams controlling with the help of a lever the movement of the stop in the vertical direction.

No. 86115- 2 The design of the fixture provides; precision machining and increase machine productivity.

The fixture can be installed on both sides of the milling spindle with a possible doubling of the achieved advantages.

FIG. 1 shows a front view of the device; in fig. 2 - a top view of the device; in fig. 3 is a front view of the cam mechanism; in fig. 4 is a front view of the ratchet; in fig. 5 is a view of the ratchet from above; in fig. b - view of a detail of the pusher from the front with a partial section; in fig. 7 - store front view; in fig. 8 - side view of the store; in fig. 9 is a view of the shop from above; in fig. 10 is a front view of the transfer mechanism; in fig. 11 - top view of the transmission; in fig. 12 is a side view of the cam feed mechanism.

On the table of the machine, a support 1 is installed in the form of two pairs of metal planes moving in the plane of the table in the dovetail guides.

The carriage is reinforced on a support, made of two rigidly interconnected squares in which the workpiece is located and is moving. The front part of the carriage, consisting of angular iron, is cut against the router to allow machining of the part.

The width of the carriage between its walls is based on the maximum width of the workpiece. For processing parts of smaller width, on the inner side of the carriage walls, guides 2 and 5 are installed, which can be set to the required width.

Permutation of these guides is carried out with the help of screws 4 connecting the side walls of the carriage with the guides.

At the ends of the carriage in the gap between its walls, a chain conveyor 5 is fixed with a pusher 6 equipped with a spring 7 with an emphasis 8 for moving the parts in a fractional direction. The conveyor consists of two stars and an endless chain. The rights of the asterisk are freely mounted on the axis, and the left leading asterisk 9 is rigidly connected to the roller. On the outer side of the rear wall of the carriage, a tapered 10 is mounted on the extension of this roller, which is connected to another bevel gear, mounted on one end of a separate short shaft 12, on which the cylindrical gear 13 is attached to the other end, coupled to gear 14, mounted on a common cam shaft 15 which is installed in bearings mounted on the back of the carriage.

On the camshaft, the cams 16 of the stops that fix the set limits of the longitudinal movement of the part are fixed. The cams of the stops contact the rollers 17 fixed on the lower end of the lever 18 fixed on the axis 19 of the bracket connected to the rear wall of the carriage. The upper end of the lever 18 is in contact with the head of the stop bolt 20, through which the spring stop 22 can be moved through the spring 21.

Spring stops with their cams can be mounted to the desired dimensions. Their purpose is to accurately record the movement of parts along the carriage from one center of the hole to another.

The camshaft 15 is rotated by a gear 23 rigidly connected to it, coupled to a gear 24, which rotates freely on the same axis as the ratchet wheel with which it is rigidly connected.

The ratchet wheel gets its rotation (periodically) from the ratchet-mechanism 25 and 26.

On the left side of the machine table, a stop screw 27 is fastened, which at its end encounters a ratchet during carriage return, which causes the camshaft, feed circuit and spring stops to move, and periodically moves the conveyor 5 at the start of the slide run from the magazine.

Store 28 with the parts to be processed is placed on the right side of the table. The store is placed above the carriage and in front of it in such a way that the carriage in its extreme forward position comes close to the store, but does not fit under it.

Store 28 is made in the form of a frame made of angle iron for a simultaneous stock of 15-20 cm. parts to be processed. Items in the store are stacked one on top of the other.

In the front side corners at the bottom of the store, slits are made for a free exit (towards the carriage) at the same time only one part.

On the front wall of the carriage, two squares 29 are fixed with dogs 30, which hit ratchet wheels 31 each time the carriage is directed towards the router.

The ratchet wheel 31 is mounted on the same shaft with the bristles 32, coupled with the other bristles 33, which through the roller 34 transfers the rotation of the half-tooth gear 35. With the help of the half-tooth gear 35 coupled with the toothed plane of the pusher 36, the latter gradually leaves the magazine. In so doing, the pusher overcomes the small resistance of the spring 57 which binds him, which tends to push him back. At the moment when the rack and, therefore, the pusher is disengaged from the half-tooth teeth 35 that are pulling it off, the pusher is pushed out by the spring force and dumps one piece onto the next carriage. The entire feed mechanism receives its movement from one pair of double cams 38.

The feed cams are mounted on a common shaft 39 placed under the machine table. The shaft is driven by a pulley mounted on its end.

The rotating cams oscillates the feed levers 40, which are loosely mounted on the axle 41. At the lower end of the lever there is a roller 42 entering the cam-shaped groove.

The upper end of the lever is pivotally coupled with the bolt 43 connected to the caliper, which provides the reciprocating movement of the latter.

Subject invention

The form of implementation of the device described in the ed. St. No. 60108 for use on a milling machine in the manufacture of semicircular grooves on the sides of the workpieces, characterized in use on the sled for these blanks, for the purpose of longitudinal movement of the last row of spring stops associated with an endless chain conveyor that periodically moves at the beginning of the stroke a slide from a magazine, with blanks through a stop screw acting on a ratchet gear included in the transmission to the leading sprocket of the conveyor, into which the shaft from the cool is also inserted by means of a lever by moving the stop in the vertical direction.

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