SU564058A1 - Device for feeding blanks to die - Google Patents

Description

one

The invention relates to hag-one punching, in particular, to devices for supplying blanks to the treatment area, taking into account the progress of the press.

A feeding device for blanks to a stamp is known that contains a gear-gear pair, a pressure element, an adjustment unit for precise feed per step and a return spring. In the device, the return stroke is carried out using return springs. The use of a return spring leads to the emergence of friction force, which causes increased wear of the working surface of the pressure element, which violates the accuracy of feeding and reduces the service life of the device l

It is also known a device for feeding workpieces to mTaMnj, comprising a gear mounted on a drive shaft, a feed rail meshing with it mounted on the upper plg; 1c of a pressing punch, an element, and a node for adjusting the feed pitch L2J.

In this device, the return stroke RecKi is accomplished by means of return springs, which leads to frictional force, causing wear of the working surface of the pressure element.

In addition, when adjusting the feed pitch, the position of the working section of the slide motion changes, which leads to a violation of the dynamic characteristics in the drive of this device.

In order to reduce the wear of working parts, improve the dynamic characteristics and reduce the overall dimensions of the device in the proposed device, the pressure element is designed in the form of a fork with raznolechey, each arm of which has a hingedly mounted hinged stop, and a rail feed step adjustment unit in the form of two mounted on the shaft in the area groove. forks of arms with profiled ends, each interacting with a corresponding stop.

In this case, the levers are mounted on the shaft with the possibility of adjusting their relative position.

FIG. 1 shows the proposed device, front view; in fig. 2 - the same, side view.

The device comprises on the top plate of the stamp a push fork 1 with two folding stops 2 and 3. On the bottom plate on the shaft 4 there is a gear 5 which is in engagement with the rack 6, which serves to feed the blanks into the working zone of the stamp. On the shaft 4 a pair of 7, 8 is installed, with the possibility of adjusting the angular solution between the links. The working surfaces of the links 7 and 8 are profiled and interact in the groove of the plug 1 with stops 3 and 2. The fastening element 9 is intended to bind the two-link pair 7, 8 to the shaft 4,

The device works as follows.

As the ram moves upwards, the fork 1 rises and the stop 3 meets the profiled link 8. Before the interaction between them, the upper part of the die comes out of Ezhnia, and the rail 6 with the product and the workpiece is in place. Then, under the action of the stop 3, the link 8 is rotated together with the gear 5 counterclockwise, as a result of which the rail 6 is shifted to the left and the finished product is removed from the working area of the flag. During the displacement, the link 7, turning with the link 8, goes into the slot of the plug, and the link 8, on the contrary, gradually goes out of it. FIG. 2, the dotted line shows the final upper position of both links; as can be seen, it is symmetrical to the final lower position. When the final upper position is reached, the link 3 stops out of interaction with link 8, therefore the feed (rack 6) stops, but the popun moves upwards and the stop 2, tilting, steps over link 7, being above it again in the working position. After that, the move b is stopped. During the slide movement in the left-hand interaction, the stop 2 and the link 7 are ready, and the movements take place in a similar order: after a small idle stroke of the fork 1, gear 5 rotates on the hour hand, the rail 6 moves to the right by the step size, placing the workpiece in the working zone of the stamp , the interaction of the stop 2 with the link 7 stops, and the slider continues to descend, the punch, the stop 3 work, tilting, step over the link 8, and all the parts return to their original position shown in fmg. 2

To reduce the feed pitch, you need to increase the angle solution between the links. 7

and 8. To do this, both links are bred relative to the middle line at the same angles, which allows it to remain unchanged (symmetric) position; working area of the stroke of the slide relative to the total length of its

move.

With a forward or reverse slide, the speed of movement of the feed staff is not constant, it changes the passage through the maximum and ends at

ole Zero speed is required for nt. higher accuracy of fixation of the filed billet in the working area of the stamp. The change in speed over the cycle is achieved by profiling the working sections of links 7 and 8.

Claims (2)

1. Device for feeding blanks to a stamp containing a gear mounted on the drive shaft, engaging a feed rail mounted on it, mounted on the top plate of the Stamp, a pressure element and a knot pushes the pitch of the lath of the rail, which, in order to reduce the wear of the working parts, improve the dynamic characteristics and reduce the overall dimensions of the device, Fully in the form of a fork for each shoulder, on each shoulder a hinged stop is hinged, and the control unit for the step of feeding the staff in the form of two levers mounted on the shaft in the groove zone of the fork, each having a common support with each stop. 2. The device according to claim 1, in which the levers are mounted on a shaft with the possibility of adjusting them relative care. Sources of information taken into account in the examination: 1. USSR author's certificate Ns 194742, cl. B 21 15 43/02, 1963. 2. USSR author's certificate NO 199815, cl. B 21 D 43 / O2, 1964. / fui.l Sh