SU977195A1 - Two crank press - Google Patents

Description

(54) TWO-CUT PRESS

The invention relates to the processing of metals by pressure, specifically to the structures of crank presses, designed to perform different, dividing operations, such as: cutting metals, cutting any type of rolled products, cutting, cutting, punching, sheet punching, hot and cold cutting. , hemming of parts and semi-finished products of rod type and size and the like operations.

A two-crank press is known, which comprises a hollow slider mounted in the bed guides with drive shafts mounted in it with eccentrics and washers Cl covering the eccentrics.

In this press, the adjustment of the inter-. The die space is made by changing the position of the slider relative to the press table, but this is done by reducing the rigidity of the frame (increasing its flexibility), which is a factor in expanding the technological capabilities of the press and, in particular, using such a press on separators. operations.

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

This goal is achieved by the fact that a known press containing a hollow slider installed in the bed guides with drive shafts with eccentrics mounted in it and with eccentric washers covering the eccentric shafts is equipped with two eccentric shafts with a common worm swivel drive, the eccentrics of which are made at the ends placed in the sides of the slider, and installed in the cavity of the slider intermediate

15 element, in which washers of drive shafts and middle parts of eccentric shafts are mounted.

Figure 1 shows the press, a general view (section A-A) i in figure 2 - times 20 cuts BB in figure 1; in FIG. 3 - the same, but with a changed position of the slide relative to the press table; in Fig.4 section bb in Fig.; . On fig.Z - section GG in figure 2; FIG. 6 is a cross section ΔD-D in FIG. 2.

In the upper part of the frame 1 is an electric motor 2 with a pulley 3 connected by a belt drive 4 with a flywheel 5 located

Claims (1)

30 on the drive shaft 6, which through gear gears 7 is connected to the second drive shaft 8. The drive shafts 6 and 8 have eccentrics 9 and 10, covered by eccentric washers 11 and 12, which, in turn, are covered by a common intermediate piece 13 located inside the cavity of the slider 14, the intermediate part 13 is kinematically connected with the slider through two eccentric shafts 15 and 16 arranged by its middle part in the intermediate part. At that, the slider and the intermediate part are assembled together with | Eccentric shafts Aulus dissolved one rigid system in which mon tiruets working tool (not shown). The eccentric shafts 15 and 16 with the ends carrying eccentrics 17-20 are mounted in the sidewalls of the slider 14 On the eccentric shafts, also worm wheels 21 and 22 are mounted in contact with the common screw 23 mounted on the intermediate part 13. Table 24. the press is integrally formed with a bed of " 1, on which guides 25 and 26 of the slider are mounted. The press operates as follows: Motor 2 rotates pulley 3 sitting on its shaft, which via belt gear 4 transmits rotation to flywheel 5 and further to drive shaft 6, and from the latter through gear gear 7 rotation is transmitted to second drive shaft 8. Together with drive shafts their eccentrics 9 and 10 rotate. The eccentrics, 9 and 10, which mate with the internal holes of the eccentric washers 11 and 12, transmit the movements last. At the same time, points O and 0, respectively, eccentric centers 9 and 10, have a trajectory in the form of circles with radii R and R. Since slider 14 together with intermediate part 13 and eccentric shafts 15 and 16 are one common rigid system bounded by guides 25 and 26 slider, and have the ability to move only in the vertical direction, eccentric washers 11 and 12 when rotating the drive shafts b and 8 also have the same degree of freedom and make swinging movements. When moving the slide together with the intermediate part and. eccentric in the vertical direction, the technological operation of dividing the metal into parts is performed. If it is necessary to reposition the slider relative to the press table 24, the operation is performed in the following sequence. When the worm 23 rotates, the worm gears 21 and 22 rotate, and together with the latter, the eccentric shafts 15 and. 16. At the same time, due to the rotation of the eccentric shafts 15 and 16, the latter, together with the intermediate part 13, move (swing in a horizontal plane, and the slider 14, bounded by the direction of yush: by them, move relative to the supports of the drive shafts 6 and 8 in the vertical direction. the movement of the slide is carried out by turning the eccentric washers 11 and 12 in the direction opposite to the eccentric shafts. (Fig. 3. In the proposed design of the press, at the same time as improving the reliability of operation, processing of the elements of the slide interacting with the intermediate link simplifies the maintenance of the press when making adjustment of the position of the slide relative to the table. Claims of the invention — Two-crank press comprising a hollow slide mounted in the direction of the front frame with drive shafts fitted with eccentrics and covered eccentric washers; in order to increase reliability, it is equipped with two eccentric shafts with a common worm gear, the eccentrics of which are located at the ends of the shafts, placed in the side walls of the RADCH, and mounted in the cavity of the ram, an intermediate element on which the drive shaft washers and middle parts of the eccentric shafts are mounted. Sources of information taken into account in the examination 1. USSR author's certificate in accordance with application 2480477 / 25-27, cl. B 30 B 1/26, 04.05-77. st / // .. gd