SU1368075A1 - Arrangement for feeding blanks to the machining zone - Google Patents

Abstract

The invention relates to the processing of metals by pressure and can be used to move the blanks and feed them into the die. The aim of the invention is to improve the reliability of operation at the expense of ensuring the stable movement of the blanks in the process of their submission. The goal is achieved due to the fact that the height of each subsequent step of the tray is greater than the previous step of the gate and less than the next step of the gate. A formula is given to calculate the height of these steps. To stably hold the workpieces on the steps of the gate and chute, these steps (or the base on which these steps are located) are set obliquely, with an angle of: to the clone facing the machining area. When the vleyO gate moves, the workpiece is fed forward and moves to the next step, while moving to the right, the workpiece moves down from the slide step to the step of the tray. 3 hp f-ly, 6 ill. sh

Description

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ABOUT

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The invention relates to the processing of metals by pressure and to be used to move the blanks and feed them into the die.

The aim of the invention is to increase the reliability of the device.

Fig. 1 shows a stamp with a mechanism for moving the blanks, a slit; figure 2 is the same, the view in the plan; Fig. 3 shows the transfer of blanks when the gate moves to the left, i.e. at the time of submission of blanks to the stamp in figure 4 is a diagram of the transfer of blanks when returning the gate to its original position; on fig.Z - gate and tray with inclined steps; Fig. 6 shows the mechanism for moving workpieces, the gate and tray of which are mounted obliquely, where p is the angle of inclination.

A device for moving workpieces, kinematically connected with the stroke of a press ram, contains a stepped tray 1 in which a stepped gable 2 is located with the possibility of moving, the heights of the steps of which are made with a consecutive increase in their sizes in the direction from the die to the magazine.

Gate 2 is attached to the movable slide 3, which interacts with the wedges 4, mounted on the upper plate of the stamp 5, connected with the press ram. The slider 3 is equipped with adjustable stops 6 and a spring 7. The ZIN 8 billet with a workpiece has an upper stop 9, which serves to limit the inclination of the workpiece and ensures that the edge of the workpiece contacts the step of the gate until it is transferred to the next step. The parts of the stamp - the matrix 10, the punch 11 and the reciprocating mechanism of movement are assembled respectively on the top plate of the stamp 5 and the bottom plate of the stamp 12.

The device for moving the blanks works as follows.

When the slider is in the upper position, the wedge 4 is raised and the slider 3 is supported by the stops 9 into the housing 13.

When the press ram is lowered with the upper plate 5 wedge fixed on it, the slide 3 and the gate 2 connected with it are retracted (Fig. 1). During the reverse movement of the stretched slider, the spring 7 returns the slider 3 and the gate Gate 2 captures the workpiece from the magazine 8 with a ledge and moves it along the surface of the upper stage of tray 1.

When the center of gravity of the workpiece passes over the threshold of the tray, it lies at one end on the next step of the gate or rests with another edge on the upper support 9 until it is completely pushed off from the step of the tray on the step of the gate (FIG. 3). When moving the gate to the right (figure 4), the workpiece is some moment

moves back on the gate all the way to the step of the tray and with further movement. the same slide gate overturns with one edge to the next step of the tray, while the other edge of the workpiece does not come out

against the support of the tray, since its height is greater than the threshold through which the workpiece is shifted at the moment. The position of the center of gravity of the workpiece relative to the axis of its rotation while

may be arbitrary, since the heights of the steps of the gate and the tray are selected more than the maximum possible rise of the edge of the workpiece when it is moved from step to step, and when the gate returns to its original position (Fig. 1), the workpiece is completely laid on the guides of the tray.

Thus, as the gate moves to the left, the blank is fed

forward and moving it to the next step, while moving the gate to the right - moving the workpiece down from the step of the gate to the step of the tray. For braking the workpiece when installing the movement mechanism on presses that perform more than 60 double strokes per minute, the steps of the gate (or) and the tray are made with a slope towards the magazine. Angle choose in

limits 3 ... 5 (figure 5).

Increasing the angles in this scheme is impractical, so when feeding blanks of small thickness, the step of the gate, which feeds the blank into the stamp zone, is weakened.

To use the movement mechanism on presses that make more than 90 double strokes per minute, the width and tray are inclined. The angle is chosen in the range of 5 ... 1 O (Fig.6).

In this case, the height of the step of the gate h ,, that supplies the workpiece to the stamp zone, is chosen constructively and, as a rule, not less than half the height of the workpiece.

The height of the second step is determined from the condition

3

U 1.

Next, the calculation is carried out according to the proposed formula

5.4,

I) l TI-1 P

zl ... h

where h ... h2 are the heights of the corresponding steps of the gate and tray.

2. Device pop.1, different

Claims (4)

 Formula of invention The gate and the tray is inclined with an angle of inclination facing the treatment area. 3. The device according to Claim 1, clause 15 and 15, in that the base performed inclined with a tilt angle facing the treatment area. 4. The device according to claim 1, characterized in that it is equipped with 1. A device for feeding workpieces into a treatment zone, comprising a stepped guide tray mounted on the base and mounted with the possibility of reciprocating relative to the tray a step gate, and a magazine with workpieces characterized by 13680754 zine, beginning with the third stage, are determined from Bh 5.4,  h g; I) l TI-1 P by the fact that, in order to increase the reliable-20 but with the upper stop mounted during the operation of the device, the height of the steps on the base of the magazine in the area of the gate and the tray in the direction of the mage-blanks. ix FI.1 fig.g ,,, J, ZSZZZZ2 t хУТ 1- У Sree.H FIG. five