SU1207564A1 - Press for stamping by means of elastic medium - Google Patents

Description

one

The invention relates to the processing of metals by pressure and relates to presses for stamping with an elastic medium.

The purpose of the invention is to reduce the size and weight of the press.

FIG. 1 shows a press, a longitudinal section; in fig. 2 shows a section A-A in FIG. in fig. 3 shows a section BB in FIG. 2; in fig. 4 shows a section B-B in FIG. one.

The press contains a frame, made in the form of interconnected upper 1 and lower 2 crossbars. Spacers 3 are installed between the upper 1 and lower 2 crossbars. The outer surfaces of the crossmembers 1 and 2 have the form of equal semi-cylinders. Crossbars 1 and 2 with spacers 3 are fastened together in a single structure wound on them outside with tension by high strength tape 4 (rectangular section wire). In the upper cross member 1 there is a cavity, which is a container in which an elastic cushion 5 is placed. In the lower cross member 2 there are two rows of cavities in which the plungers 6 of the power cylinders and channels 7 and 8 are placed to supply fluid to the intermediate cavity (not extreme) along the length of the plungers 6 and channels 9-12 (Fig.1,2) for supplying fluid in the cavity 14 slider leans 15. On slider 15, guiding strips 16 are fastened and a backing plate 17 is placed on which guiding strips 18 are fastened in turn and a loading table-19 is placed. Supports are attached to the ends of the cross member 2. 20, which the press is installed on the foundation (not shown). A strap 21 (Fig. 2, 3) with a hole for a finger 22, fastened in a slider 23, is attached to the loading table 19. The latter is installed in the internal slots of the guide 24 for increasing the loading table 19. A slider 25 for the direction of movement of the loading table 19. The movement of the slider 23 is performed by the rope 26. The rope 26 is attached to the lower tide of the slider 23

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 and goes around the rollers 27 mounted on the axles in the brackets 28 mounted on the ends of the guide 24. The ends of the rope 26 are wound on a drum (not indicated 5) of the drive for moving the loading table 19. The guide 24 is attached to the base 29 with screws 30. Between the guide 24 and the extension 29, spacers 31 are installed. From the mutual

About the displacements of the guide 24, the spacers 31 and the base 29 are fixed by pins 32. The height of the spacers 31 is equal to the thickness of the backing plate 17, so that with the spacers removed 31

15, the plane of the guide 24 is located at the level of the lower plane of the plate 17 and the latter can be extended to the guide 24. Near the lower edge of the plungers 6 on their outer

20 surfaces are grooves in which sealing rings 33 (cuffs) are placed. In the cross section, near the upper edges of the cavities, one groove is made, in which seals 34 are placed. Between seals 33 and 34, through holes (not shown) in the cross bar, liquid is supplied to lubricate the rubbing surfaces. Plungers 6 hydraulic cylinders

3Q and the cavities in cross-section 2 are of rectangular cross-section with rounded corners.

The press works as follows. The right loading table 19 with the preformed blocks and blanks (not shown) slider 23 of the drive for moving the right loading table is moved along the guide 24 to the left, to the working area of the press. When this finger is 22, it is located in the hole of the bar 21 and, along with the slider 23, moves the loading table 19 to the left into the working area of the press. When the table 19 takes a position under the elastic cushion 5, pressurized fluid is supplied to all cavities of the lower cross member 2 and the plungers 6 together with the slider 15, the base plate 17 and the table 19 are moved upwards.

50 Plank 21 comes off of the finger 22, and table 19 enters the cavity of the upper cross member 1 and the workpiece, form blocks, and then table 19 comes into contact with the elastic cushion 5 and

55 squeeze it. In the elastic cushion 5, pressure is created and the blanks are formed. After the set pressure

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the cavities of the cross member 2 are connected to the tank and under the action of the elastic forces of the elastic cushion 5 and the weight of the table 19, the plate 17, the slider 15, they together with the plungers 6 move downwards. Plank 21 is pushed onto pin 22 with its opening and the right table moves by means of the movement of the loading table to the right guide 24, after which the left table 19 is fed with a movement drive into the working area of the press to stamp the blanks placed on it.

When raising and lowering the slider 15 due to some reason, such as an unbalanced load, skid skew may occur, exceeding the allowable value. Therefore, when the skew of a given value is reached, the less acceptable, partially or completely blocked channels, 9-12 of the liquid supply to the extreme cavities of the cross member 2, the plungers 6 in which move with greater speed. The speed of movement of these plungers 6 slows down and slider 15 is brought to a horizontal position.

If necessary, change the elastic cushion 5 one of the loading tables 19 (for example, right) is placed on the base plate 17 in the working area of the press. The right guide 24 of the loading table 19 is undocked from the base 29, lifted by a crane (not shown), the spacers 31 are removed and the guide 24 is mounted on the base 29, fixed by the shortened pins 32 and secured. The sliding surface of the table 19 on the guide 24 will occupy the position of the lower plane of the base plate. 17. The plate 17 is detached from the slider 15 and the winch (not shown) is shifted together with the loading table 19 onto the guide 24. The elastic cushion 5 is lowered from the cavity of the cross member 1 onto the slider 15.

Moving the cushion 5 out of the press area is done using a drive for moving the loading table 19. For

From the right side of the rail 24, the base plate 17 with the table 19 is removed, or the table 19 is removed from the left guide 24 and the table is moved to

lower level by removing the spacers 31. The plungers 6 apply concentrated forces to the slider 15, therefore the slider 15 is subjected to bending. The magnitude of the bending moment depends on how

The spacing of the plungers, 6 in the longitudinal direction, and from the spacing of the plungers 6 in the transverse direction. Therefore, it is important that the density of the plungers 6

was the largest, which, in addition to reducing the bending loads on the slider 15, will lead to a decrease in the length and width of the lower cross member 2, and consequently, to a decrease in its mass. The maximum density of the plungers 6 is achieved at their rectangular cross section.

In the proposed press uplifting devices are placed in the grooves of the plungers 6 near their lower edges, the plunger stroke is made by using a base plate 17, about half its length, as a result of which half of the height of the cross member 2 (Fig. 1) does not experience pressure loads. and perceives part of the tensile forces acting on the lower half of the cavities, in contrast to known structures, in which all

the length of the cylinder is loaded with full working pressure due to the location of the seals in the body. This pos-. Will fill the walls of the cavities in the crossbar 2 more thin and reduce

dimensions and weight of the cross.

The installation on the Slider 15 of a replaceable backing plate 17 allows to provide a space between the slider 15 and the upper crossbar 1, sufficient to accommodate the cushion 5.

with a small code of plungers 6. This also reduces the size of the press and its metal content.

The proposed press has a smaller weight and dimensions compared with the known.

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Editor M.Tovtin

Compiled by V. Muslimov

Tehred M. Parotsay Proofreader V.Sinitska

Order 90 / 8Duration 783, Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., d.A / 5

Branch ShSh Patent, Uzhgorod, st. Project, 4

Claims (3)

1 PRESS FOR STAMPING AN ELASTIC ENVIRONMENT, comprising a bed made in the form of interconnected struts of the upper and lower cross members fastened with a tape wound on them, a container with an elastic cushion placed on the upper cross member, power hydraulic cylinders located on the lower cross member, on whose plungers there is a slide , and loading tables installed on different sides of the slide with the possibility of horizontal movement, placed on rails rigidly fixed to the base, different it, that in order to reduce the size and weight of the press, the lower crosspiece on the part facing to the slider are formed evenly spaced cavities plungers ,. Bearing a slider are installed in these cavities, with separate channels made in the cavities extreme in length, and the remaining cavities are interconnected. 2. Press according to claim 1, characterized in that the cavities in the lower cross member and the plungers are made of rectangular cross-section with rounded corners. 3. The press according to claim 1, characterized in that it is equipped with a removable backing plate mounted on a slider and removable spacers placed between the guides and the base, the height of which is equal to the thickness of the backing plate.