SU1318324A1 - Die for bending u-shaped articles from sheet piece blanks - Google Patents

Abstract

The invention relates to the processing of metals by pressure and provides increased productivity by automating the flexible U-shaped products from sheet piece blanks. The stamp comprises a base, a punch, a die (M), tappets associated with a cross head, and hook pullers with brackets attached to a spring-loaded insert with guides. Hook pullers are made in the form of double-sided wedge elements, alternately interacting with their working surfaces with fixed wedges placed on the base and core. When bending, it is possible to remove the product from M, lift it to a certain height above the mirror M, and drop it with a spring-loaded insert, which creates favorable conditions for the device to operate in automatic mode. 6 Il. & b (L

Description

113

The invention relates to the processing of metals by pressure and can be used for bending sheet varietal, profile material.

The aim of the invention is to increase productivity by allowing the automation of the removal of U-shaped articles from a punch.

Figure 1 shows the proposed stamp at the final moment of bending; 2 is a section A-A in FIG. one; figure 3 - wedge element, top view; figure 4 - punch in the upper position of the press slide; figure 5 - section bb in figure 4; figure 6 is a view of the Sainter 10 spring wedge element. A stamp for making U-shaped articles from sheet piece blanks contains a base 1 on which a bending matrix 2 is attached, and a movable njniTy with a punch 3 fixed on it. In the guides of the punch 3, insert 4 is installed with the movement of the pushers 5 connected with punch 3 by means of tension springs 6. Hook pullers are installed at the ends of the punch, each of which is made in the form of a wedge element 7 with two working surfaces connected with guides 8 rigidly fixed at the ends of the insert 4 of the bracket 9 and having a wedge surface 10 that is designed to interact with the wedge 11, as well as the wedge surface 12, made with the possibility of interaction with the bevel 13, made on the base 1. On the movable wedge element 7 there is a brake spring 14, which constantly presses it to the rail 8 of the bracket eyna 9 ..

The wedge element 7 forms a gap with the lower end of the punch, the magnitude of which exceeds the magnitude of the slight deflection of the workpiece under the punch and the thickness of the material being forged.

The movement of the element 7 relative to the punch 3 and the wedge 11 is limited by the wedge surface 10 on one side and the protrusion 15 on the other, and on the opposite side of the wedge surface of the wedge 11, the release 16 is made under the protrusion 15.

Under hook pullers in plate 1, the release 17 is completed.

42

The stamp works as follows.

When the press slider is in the upper position, the insert 4 of the punch 3 is in the extended state, the element 7 is outside the working area.

When the press crawl runs down, the insert 4 is pressed against the punch 3 by the action of the tension spring 5.

Together with the insert 4, the punch 3 falls on the workpiece and bends it into the piece 18. At the same time, the element 7 moves under the workpiece under the action of the bevel 13 of the base 1 on the wedge surface 12,

As the press ram moves upward, the part 18 supported by the hook pullers rises together with the punch 3 and the insert 4 under the die 2, creating a space sufficient to accommodate the element of the removal device.

At the end of the stroke of the press ram upward, the I-4 under the action of the pushers 5 connected to the cross head j moves along the inclined plane of the punch 3, forming a gap with the part 18. At the same time, the element 7 under the action of the wedge 11 and the wedge surface 10 leaves the engagement with the part 18 which falls on the element of the removal device and is removed by means of mechanization.

At the beginning of the subsequent working stroke of the press slide, the stretch spring 6 returns the insert 4 to its original position, and the element 7 remains outside the working area.

Claims (1)

Invention Formula Stamp for bending U-shaped products from sheet piece blanks, containing a die placed on the base, mounted on a movable plate, and a punch connected to a crosspiece press pushers located in the hole of the punch, and hook pullers installed on the non-working ends of the punch, characterized in that, in order to improve performance by allowing the automation of the bending process, it is equipped with a subdivided insert installed in the punch that can be moved at an angle to the axis stamp, brackets with guides mounted on the vertical non-working ends of the insert, and hook pullers are made in the form of moving wedge elements with two working 313183244 surfaces placed in directions with the possibility of alternately replacing the young brackets, fixed conditions with the corresponding working one-side wedges fixed with other surfaces of the moving wedge on the punch and the base of the installed elements. 2; Fy / 1-D Fig.Z FIG. five Compiled A.Guz Editor I.Nikolaychuk Tehred MoHodanich Proofreader S.Shekmar 2456/8 Circulation 732 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, Projecto st., 4