SU1315079A1 - Bending die - Google Patents

Abstract

The invention relates to the processing of metals by pressure, in particular to bending in the dies of the end sections of parts, and provides for the expansion of the technological capabilities of the stamp. The stamp contains a punch, a plate with racks, an ejector, pivoting semi-matrices (P) pivotally connected to it. At the free ends of the latter, perpendicular to their bending surfaces, spring-loaded stops with slopes facing the inside of the punch are placed in the grooves. The movement of the stops is limited by screws. The posts are made with protrusions for interaction with the end surfaces P adjacent to the hinges, the punch is in the form of a pressing plate. For bending the end sections at angles less than 180 or 180 with large radii bending, protrusions are provided on the side surfaces of the punch to interact with the ledges of the lugs P. , rotate around the axis of the hinges and bend the ends of the part before they come into contact with the part itself or with the punch protrusions. The release of the ring portions from contact with the stops is carried out by embedding the latter into the grooves. 1 hp f-ly, 5 ill. With CO eaten Oh

Description

The invention relates to the processing of metals by pressure, in particular to bending in dies.

The purpose of the invention is the expansion of the technological capabilities of the stamp by providing flexible end sections of the part to angles more, less

and equal to 180. |

FIG. 1 shows a stamp for bending I - at the moment of contact of the punch with the part, II - at the time of the end of the operation, bending the end portions of the part by 180, section; Fig 2 - the same, at the moment of the interaction of the protrusions on the side bending elements with additional working surfaces; in fig. 3 - a stamp for bending the end sections of the part at an angle greater than 180 in the middle of the working stroke, section; in fig. 4 - the same at the time of the end of the bending operation; in fig. 5 - a stamp for bending the end sections of the part - at an angle less than 180, cut.

The punch for bending the end portions of the part contains a punch 2 rigidly fixed on the upper plate 1, made in the form of a pressing plate with dimensions not limiting the free movement of the end portions of the part 3 during the bending process, installed in guides (not shown) fixed on the bottom plate. 4, an ejector 5 pivotally connected with spring-loaded annular springs 6 by semi-matrix 7 in contact with racks 8 fixed on the bottom plate 4. Ejector 5 is connected with a buffer by means of pushers 9 (not shown ).

On the rotatable semi-matrix 7, perpendicular to their working surface, spring-loaded springs .10 stops 11 are installed, preventing the sliding of the end portions of the part 3 along the bending surfaces of these semi-matrices. The movement of the lugs 10 is controlled by the limiters 12.

Additional protrusions 13 are provided on the uprights B, which provide interaction with the face surfaces of the semi-matrix 7 adjacent to the hinges.

ten

15

13150792

1 in, on the punch 2, protrusions 15 are made, enabling interaction with the ledges 14 of the stops 11.

The distance from the hinge axis to the ejector mirror 5 should be no less than the thickness of the part and increases with increasing bending radius. It can be calculated by the known formulas. Stamp for bending works as follows.

The part 3 is laid between the stops 11 on the surface of the ejector 5 and the rotary semi-matrix 7. When the press slide (not shown) moves down, the punch 2 acts on the part and through the ejector 5. The ejector pushes down the rotary semi-matrix 7, interacting with the working surfaces mi racks 8, begin to rotate around the axis of the hinges. In this case, since the distance between each of the stops 11 and the punch 2 begins to decrease, the ends of the part abut against the surfaces of the stops 11, perpendicular to the bending surfaces of the rotary semi-matrix 7. Under the action of the stops 11, which prevent the end portion of the part from sliding along the bending the surfaces of the rotary semi-matrix 7, and the punch 2, pressing the part to the ejector 5, the end sections of the part begin to bend, and the resistance force 35 presses the free parts of the part from one side to the ejector 4, and the other to rotatable semi-matrix 7, which ensures the bending of the end portion of the part in the zone of the hinge connecting the ejector 5. and the rotary semi-matrix 7.

20

25

thirty

45

sa semi-angle about 90

50

During the further course of the slide, the 7 are turned on and the protrusions on them interact with the projections 13 of the pillars. Continuing to rotate around the axes of the hinges of the half-matrix 9 complete the process of bending the end portions of the part.

At the end of the process, the lugs 11 are flexible abutted with ledges 14 onto the surface of the part and, compressing the spring 10, enter

At the ends of the stops 11, taps are made into the grooves of the semi-matrix 17. The contact of the stop 14, facing the die axis and exceeding in height the thickness of the part and

3. For the implementation of the flexible end 11 with the end of the end section of the part, S is broken and during the return stroke of the press ram, the ejector 5 and the half-empty sections of the part 3 are at angles less than the matrix 7 under the action of spring

sa semi-angle about 90

During the further course of the slide, the 7 are turned on and the protrusions on them interact with the projections 13 of the pillars. Continuing to rotate around the axes of the hinges of the half-matrix 9 complete the process of bending the end portions of the part.

At the end of the process, the lugs 11 are flexible abutted with ledges 14 onto the surface of the part and, compressing the spring 10, enter

into the slots of the semi-matrix 17. Contact stop

and

11 with the end face of the part breaks S and, during the return stroke of the press ram, the ejector 5 and semi313

rotate to their original position, without extending the end portions of the part.

In the case of using the proposed punch for bending the end portions of the part at angles less than 180 or 180 with large bends, contact of the stop 11 with the end of the end portion of the part is eliminated by the interaction of the step 14 with the protrusion 15 on the punch 2.

The use of the proposed stamp reduces the labor intensity of punching by eliminating the need to manufacture parts with 180 or more end sections bent in two strands, or in two stamps; reducing the labor intensity of manufacturing die tooling by ensuring that parts are made with one tool in the case of bending the parts by 180 or more, or by eliminating the need to manufacture an additional device for removing parts from the punch in the case of bending the corners in the proposed die of the end sections 90 ° and less than 180.

0

5079 4

Claims (2)

Claim 1. Stamp for bending, mainly the end sections of the part containing a punch, a plate with racks placed on it, an ejector, pivot semi-matrices having a bending and supporting surface and mounted with the possibility of interacting with it. with racks, about tl and h a-. y and u with the fact that, in order to expand technological capabilities, each semi-matrix is provided with an emphasis for the workpiece with placed in the groove, 5 performed at the free end of the semi-matrix perpendicular to its working surface, with a ledge facing the punch axis, as well as an adjustable stop, each stand has a protrusion for engagement with the end surface of the semi-matrix on the hinge side, and the punch is made in the form of a squeeze plate. 2. A stamp according to claim 1, 1 and 2 with the fact that protrusions are made on the side surface of the punch for engaging with said steps of the lugs, and the adjustable stop is made in the form of a screw. 0 five u ff 1 Yu i / 8.2 Editor A, Sabo Compiled by K. Semenko Tehred M.Hodanich Order 2236/6 Circulation 732 VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 FIG 5 Proofreader A. Obruchar Subscription