Press lever mechanism

FIELD: metallurgy.

SUBSTANCE: invention relates to metal deformation process and can be used in press plant. Lever mechanism of press contains toggle, slider, two trijugate links and closing connecting rod. Connecting rods are symmetrically installed relative to geometrical axis of punch movement. Sliders, connecting rods and two trijugate links form pentagonal closed variable contour.

EFFECT: there is provided improving of pressing, reduction of load of separated links of press mechanism.

1 dwg

 

The invention relates to the field of engineering, and in particular to mechanisms for pressing.

The famous six-bar lever mechanism press Chebyshev [1, str,], with the leading rod, complex motion which is converted into reciprocating motion of the output link. The disadvantage of this press is the presence of complex motion in the drive links, which makes it impossible to apply modern engines.

The closest in technical essence is a crank-slider mechanism press [2, 2], containing the crank, slide and connecting rod, which is made in the form of a kinematic chain. The connecting rod is connected to the reception through the swinging arm.

The disadvantage of this press is that the impact on the slider is made through one rod that does not allow you to develop a great effort on the slider.

The objective of the invention is to improve the quality pressing by acting on the slider by pressing two of the connecting rod. In the process of pressing decrease congestion on some sections of the press due to a change in the rigidity of the transmission of motion to ensure the slider of self.

The solution of the problem of self of the slide is achieved by transferring motion to the slide from the actuator through the pentagonal closed variable path.

The invention enables the fast is in the lever mechanism of the press, including the crank, slider, two treharne link and the connecting rods, the latter symmetrically mounted relative to the geometrical axis of motion of the slide. In this slide, the connecting rods and two treharne link is formed between a pentagonal closed variable path.

In the drawing, provided the claimed linkage mechanism of the press.

Lever press mechanism consists of a crank 1 (O1A)connected with the driving motor (not shown), two treharne links 2 (ABD) and 3 (CBE), equalizer 4 (O2C), two connecting rods 5 (EF) and 6 (DG) and slider 7. Rocker 4 has a hinge connection with the pillar (a-pillar).

Operates a lever mechanism of the press in the following way. Upon full rotation of the crank 1 through treharne links 2 and 3, the rocker 4, associated with the stand, the connecting rods 5 and 6, which are trailing, transmits motion to the slider 7, which in turn affects the processed object 8.

The performance of the proposed mechanism is proved on the basis of the known formulas of P.L. Chebyshev (see [2] str)

W=3n-2P5,

where W is the mobility of the mechanism, n is the number of moving parts, R5the number odnopodezdny kinematic pairs.

In the proposed mechanism of n=7, p5=10 then W=37-210=1, i.e. for a given movement of the crank all the other elements will move quite definitely.

Sources of information

1. II Artobolevsky I.I. Mechanisms in modern engineering, volume 1. - M., Science, 1870.

2. Pat. No. 2201348 RF, MCP 7 WW 1/06, F16 21/00. Crank-slider mechanism press / Janitorial LT, Chuikov OS, Old S. p. No. 2001120227; Appl. 18.07.2001; publ. 27.03.03., Bull. No. 9-5; 1 Il.

A lever mechanism of the press containing the crank, slider, two treharne link and trailing rods, characterized in that the trailing rods symmetrically mounted relative to the geometrical axis of motion of the punch, while the slider trailing rods and two treharne link is formed between a pentagonal closed variable path.



 

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