SU1238891A1 - Apparatus for automatic feed of bar stock in n/c machine tools - Google Patents

Description

The invention relates to machine tool construction and can be used to automatically feed workpieces from a bar material.

The purpose of the invention is to increase the productivity and reliability of the supply of the thread by eliminating the need for additional grooving of the bar groove and controlling the position of the gripping mechanism and behind the bar clamp.

FIG. 1 shows a device for automatically feeding a bar in three positions; in fig. 2 - the mechanism of capture, cut,

The device contains a caliper 1, located opposite the working spindle 2, from which the 3-bar segment protrudes. On the caliper I, a gripping mechanism is installed, comprising a housing 4 and an installation 5 for moving the gripping mechanism along an axis direction.

The front tool holder 6 and the rear tool holder 7 are also mounted on the slide -1. A hydraulic cylinder (not shown) is installed in the housing 4, to which the rod 8 is attached to the stem, mounted for movement relative to the housing 4. Two jaws J and 9 are attached to the housing 4 on the hinge 9 11. Between the jaws there are three fingers 12-14, rigidly attached to the bar 8. At the place of interaction of the jaws 10 and 11 with the fingers 12-14, the faces of the 15-18 jaws are inclined towards the hinge 9, In addition, the sensor 19 is attached to the bar 19 the position of the mechanism of grip in contact with the jaws 10 and 11. At the clamping portion of one of the jaws 10 or 11 of the sensor 20 the presence of the bar clamp. Sensors 19 and 20 are connected to the CNC machine stand (not shown).

The device works as follows.

The CNC machine stand contains a program in which the driven support 1 moves by it. After processing the next part and its segments, turn off the spindle 2 (Fig. 1, A), the support 1 is moved down the X axis

five

0

five

0

five

0

five

0

Check the front tool holder 6 to remove it from contact with the 3-bar section. After that, the caliper 1 is moved along the L axis to the position in which the axis of symmetry of the jaws 10 and II of the gripping mechanism passes perpendicularly to the bar segment 3 protruding from the spindle 2. Then the caliper 1 is mixed along the X coordinate. rod (Fig. 1, /). In the initial stage of clamping the bar section 3, the fingers 12-14 are in the position shown in FIG. 2. When the bar section 3 is completely between the jaws 10 and 11, turn on the hydraulic cylinder placed in the housing 4 of the clamping mechanism and move the bar 8 with the fingers 12-14 mounted on it along the fixed jaws 10 and 11. Due to the movement of the fingers 12-14 along the inclined edges of the 15-18 jaws.

10 and 11, the latter are clamped, clamping a length of 3 bars. The sensor 20 of the presence of the clamp bar transmits a signal about the clamp to the CNC rack of the machine and the clamp mounted on the spindle 2 of the machine, opens the bar. The support 1 is moved along the axis of the g. And the sponge Y. and 11 draws a length of 3 rods to the required length (in Fig. 1, A. If, due to some reasons, the sponge 10 and

11 is depressed, the clamp presence sensor 20 transmits a signal to the CNC rack and the device is stopped. When bar length 3 is pulled out to the desired length from the machine spindle 2, the spindle clip 2 clamps the bar length 3, and the jaws 10 and 11 unclench it by moving, the bar 8 back in relation to the fixed guides 10 and 11. When the bar is unclamped with jaws 10 and 11, a sensor of the initial position of the clamping mechanism transmits a signal to the CNC stand of the machine and the caliper 1 is retracted from bar length 3 along the axes

X and Z to the initial position (Fig. 1, A), thereby pointing the front toolholder 6 to the initial position dp of continuing processing. Turn on spindle 2. Start machining the part. After processing and cutting the part, the cycle is repeated.

20 l

№ / 5 72 / J / /

//. / /

Editor N. Dankulich

Order 3332/8 Circulation 1001 Subscription

VNIIPI USSR State Committee

on the money of inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab. D. 4/5

Production and printing company, Uzhgorod, st. Design, And

Ф14г.2

Compiled by V. Semenov

Tehred I. Popovich Proofreader A. Obruchar

Claims (1)

DEVICE FOR 'AUTOMATIC FEEDING OF BARS ON CNC METAL-CUTTING MACHINES containing a bar-mounted gripping mechanism made in the form of a body and two jaws pivotally mounted on the body, characterized in that, in order to increase the productivity and reliability of the bar feeding, on external and faces are made inclined to the clamping planes of the jaws on the 'inner surfaces of the jaws', and the gripping mechanism is provided with a strap installed on the front of the housing with the ability to move vertically three fingers, one of which is placed between the jaws and designed to interact with their internal faces, and the other two are placed on the outside of the jaws and are designed to interact with their external faces, and the device is equipped with an initial position of the gripping mechanism connected to the CNC system and a bar clamp sensor mounted on one of the jaws and designed to interact with the bar. SU „, 1238891