RU1798029C - Method of stamping parts on power press with flywheel drive and automatic feeder of blanks - Google Patents

Abstract

The invention relates to the processing of metals by pressure. The method includes a cycle for processing single parts in one working stroke of the slider, wherein each cycle includes at least one double stroke of the slider and, in addition to the working stroke, contains a idle stroke of the slider during which the workpiece and finished part are loaded and unloaded, respectively. And each processing cycle includes at least one Additional double slider stroke. In each processing cycle, loading and stamping are performed during one double stroke of the slider, and unloading is performed during the other two, without stopping the slider. 3 ill.

Description

The invention relates to the field of metal forming, in particular to methods for the rational use of mechanical flywheel presses.

The purpose of the invention is to increase the reliability and efficiency of the press.

Figure 1 shows a press device for carrying out the claimed method, a general view; figure 2 view along arrow a in figure 1; Fig. 3 is a diagram of energy cycles during stamping in continuous strokes without additional idle strokes.

The device with which the inventive method is carried out comprises a feed gate 1 (FIG. 1) with a half-hole 2 (FIG. 2) for receiving stamped blanks connected to the rod of a double-acting pneumatic cylinder 3, which is mounted on a table with an arm 4 S press 6. On the table 5, a matrix 7 is also mounted, in which a pusher 8 is placed, which rests on the ejector 9 of the press 6, kinematically connected with the drive of the slide 10 carrying the punch 11.

The gate 1 has the ability to translationally move along the guide 12 so that in one of the extreme positions the axis of the hole 2 coincides with the axis of the hole in the matrix 7, and in the other with the axis of the feed pipe 13, which is filled with blanks 14 from the vibratory hopper 15. Nadporshneva and torsion the cavities of the pneumatic cylinder 3 are connected by highways to an air distributor (not shown in the drawing) electrically connected to a command troller (also not shown in the drawing). The push-in gate 16c with the pneumatic cylinder 17 has a similar device. In the extreme upper position, the end face of the pusher 8 coincides with the plane of the die 7 and the stamped part 18 rests on it. The drive of the press ejector 9 is designed in such a way that the necessary position in the extreme upper and extreme lower position of the pusher 8 is provided in accordance with the cyclic diagram.

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The method is carried out as follows.

A program is introduced into the press controller which, when the press is in automatic mode, provides stamping of energy-consuming parts according to the proposed method.

In the vibratory hopper 15, workpieces 14 are loaded, which are oriented in it and enter the supply pipe 13, which is gradually filled. In this case, the lower workpiece falls over the opening 2 of the gate 1. The press drive is turned on, the electric motor accelerates the flywheel (not shown in the drawing) to a steady angular velocity. Turn on the press in automatic mode, the gate 1 moves the workpiece to the axis of hardness in the matrix 7 and goes to its original position. Then the clutch of the press is turned on, the slider 10 begins to make continuous down-up moves. At the beginning of the slider's downward movement, the ejector 9 lowers the pusher to the lower position, with the further movement of the slider, the punch 11 will deform the workpiece. At the beginning of the stroke of the slider up, the ejector 9. raises the pusher 8 together with the stamped part 18 to align its end with the plane of the matrix. 7 and stops. As the slider moves upward (Fig. 2), the gate 16 is commanded by the controller including the air distributor (not shown in the drawing) of the pneumatic cylinder 17, to the matrix plane 7, the stamped part 18 and returns to its original position. In the next stroke of the slider. Downward punching is not performed - additional double stroke. Each treatment cycle includes at least one additional double slider stroke. During the stroke of the slider 10 up (section D in FIG. 3) immediately after stamping and the entire next down-up move (sections D, E), the electric motor accelerates the flywheel and increases its angular velocity (curve 19 in sections G, D. E, A is FIG. 3), which has fallen (curve 19 in section 8 of FIG. 3) during / during deformation of the workpiece (curve 2Q is a graph of the technological force) to the nominal value (curve 19 in section B of FIG. 3). And at the end of the next move

the slide up gate 1 feeds the next workpiece 14 on the axis of the matrix. Its deformation is already carried out only at the third stroke. In the fourth move again

stamping is not performed, but at the end of it, another preform is fed up. Further cycles are repeated. In each processing cycle, loading and stamping are performed in one double stroke

slider, and unloading - during another, without stopping the slider. Moreover, the power delivered by the electric motor varies depending on the angular velocity of the flywheel (curve 21 in Fig. 3), and the area delimited by this curve and the abscissa axis determines the operation of the operation, i.e. energy capabilities of the press. Curves 22, 23, 24 (FIG. 3) characterize, respectively: a change in the angular velocity of the flywheel; technological efforts, electric motor capacities in sections A, B. B, ft B V A in the event that the supply of blanks and their deformation (stamping) were performed at each stroke of the slider (curve 25 in FIG. 3).

The area bounded by curve 21 in sections A, B. V. G, D, and E with the abscissa axis is larger than the area bounded by curve 24 in sections A, B, By. G (within one cycle), i.e. operation operation is greater when using a skip press.

The invention is a method of stamping parts on a mechanical press with a flywheel drive with

automatic loading of workpieces, including a cycle of processing single parts in one working stroke of the slider, with each cycle including at least one double stroke of the slider and, in addition to the working stroke, contains an idle stroke of the slider, during which the workpiece is loaded and unloaded, respectively and the finished part, with the exception that in order to increase the reliability and efficiency of the press, each processing cycle includes at least one additional double stroke of the slide, and in each processing cycle loading and stamping full removed during one double stroke of the slider, and unloading for another without stopping the slider.