SU470340A1 - Device for feeding the strip and tape material in the stamp - Google Patents

Description

one

The invention relates to the field of cold metal forming and can be used to feed strip and strip material into a die.

A device is known for supplying strip and tape material to a stamp comprising a carriage carrying podpruzhi.Nennye eccentrics installed in racks and rotated around the axes under the action of the upper plate of the stamp.

The purpose of the invention is to ensure constant clamping forces of the feed material at each feed step and to improve the accuracy of the feed step.

For this, the carriage of the proposed device is provided with rollers serving as supports for the feed material, mounted on the axles with the possibility of axial movement under the eccentrics, flanges of each of which are additionally made flanges, interacting with the ends of the support roll when the material is fed.

The eccentric axes are fixed in the vertically spring-loaded polos, which are additionally installed in the carriage racks.

The eccentrics and backup rolls are of the same diameter and have the same elastic properties.

FIG. 1 shows the proposed device, a general view; in fig. 2 - clamp, partial cut.

The device for feeding the strip and tape material contains a carriage 1, in racks 2 of which axis 3 of the support roll 4 is fixed, slide 5, springs 6, axis 7 of the eccentric 8, lever 9 with spring 10 is fixed on axis 7. Sliders 5 move in grooves of the struts along the guides 11. The support rolls 4 are mounted on the axis with the help of ball guides 12. The flanges 13 are made at the ends of the eccentrics. The device operates as follows.

The material 14 is fed between the eccentrics 8 and the backup rolls 4.

During the course of the upper stamping plate, the levers 9 are rotated by the action of the springs 10, rotating the eccentrics 8, the left one

clockwise, and the right - counterclockwise.

In this case, initially there is a gap between the eccentrics 8 and the material, the tape is not clamped and does not tighten.

The next period of closing the eccentrics 8 is accompanied by the raising of the crawlers 5, the stroke size of which is limited by the thickness of the springs 6. At the end of the eccentric turn, the tape is compressed by the forces of the spring reaction

6 and pulled out.

If the material 14 has a lateral displacement with respect to the axis of the carriage 1, then the forces arising therewith will displace it in one direction or the other until the misalignment with the support rolls is eliminated, since the coefficient of friction between the feed material 14 and the working surface of the support roll is greater than the coefficient of rolling friction guide roll 12. In this case, the movement of the support roll 4 along the axis 3 begins from the neutral position into which it is installed, when the eccentric 8 with flanges is opened.

Subject invention

Claims (3)

1. Device for supplying strip and tape material to a stamp containing a carriage carrying spring-loaded cams installed in racks and pivoted around the axes under the action of the top plate of the stamp, characterized in that, in order to ensure the clamping force of the supplied material at each feed step and improve the accuracy of the feed pitch, the carriage is provided with rollers serving as supports for the feed material; mounted on the axles with the possibility of axial movement under the eccentrics, at the ends of each of which flanges are additionally made, which interact when the material is fed with the ends of the support roll. 2. The device according to claim 1, characterized in that the axes of the eccentrics are fixed in the spring-loaded in the vertical direction additionally mounted in carriage racks. 3. The device according to claim 1, characterized in that the eccentrics and support rolls are made with the same diameters and have identical elastic properties. / 2 srig.2