RU2086334C1 - Cutting off and bending die set - Google Patents

Abstract

FIELD: plastic metal working, namely manufacture of complex-shape bent products. SUBSTANCE: die set includes upper plate 1 with bending punch 2 and two cutting inserts 3,4 and lower plate 5 with die 6 and cutters 9,10. Inserts 3,4 are placed in plate 1 at the same side of punch 2, they are mutually spaced by distance L and arranged in level of bending plane of punch 2. Cutters 9,10 are mutually spaced by distance L and arranged in different levels. When upper plate 1 moves downwards, at first part 14 is cut off from strip 12 by means of insert 4 and cutter 10 and then said part is deformed by means of bending punch 2 and die 6. At the end of punch stroke interpart bridge 13 is cut off and immediately it is removed along slope. Process of cutting off ready part is realized by two stages at the beginning and at the end of last bending operation. Ready part 14 is removed from working level as moved by stroke of fed strip 12. EFFECT: improved design. 1 dwg

Description

 The invention relates to the processing of metals by pressure, in particular to die tooling for processing sheet material.

 Known stamp sequential action, containing the upper movable and lower stationary plates with a matrix and a punch, cutting elements and means for removing waste and parts / 1 /.

 Processing on such a stamp allows you to combine several operations, however, in the manufacture of parts of a more complex form when cutting metal with jumpers, the task arises of automatically removing the jumpers and finished parts without compromising performance.

 A die for bending and bending is also known, comprising a bending punch with two cutting edges fixed on the upper movable plate, a die on the lower stationary plate and two cutting knives with cutting edges and means for automatically removing the waste / 2 /.

 The stamp ensures the execution of bending and cutting operations, then using compressed air through the channel system removes the cut-off jumper, and then the finished part is removed.

 The purpose of the invention is to increase productivity by separating the flows of automatic removal of waste and parts at different levels in the stamp.

 This is achieved by the fact that in the stamp for cutting and bending parts made of sheet material containing a bending punch with two cutting edges fixed on the upper plate, a matrix and two cutting knives with cutting edges on the lower fixed plate, and also means for removing waste, the upper movable the plate is equipped with rigidly fixed inserts located on one side of the bending punch and the matrix, the cutting edges of which are located at a distance L equal to the length of the inter-detail jumper at the same level as the bending plane of the p the one and one side of it and the matrix from the material supply side, while the cutting knives are fixed so that the cutting edge of the first knife is located at the material supply level, and the cutting edge of the second knife is at the same distance L from the cutting edge of the first knife below the bending edge matrices at a level that provides a piece of inter-detail jumper at the end of bending.

 The drawing shows the proposed stamp, General view.

 The stamp contains on the upper movable plate 1 a bending punch 2 with two rigidly fixed inserts 3, 4, the cutting edges of which are located at a distance L equal to the length of the inter-part jumper at the same level with the bending plane of the punch. The inserts 3, 4 are fixed on one side of the punch 2 from the supply side of the material. The matrix 6 is placed on the bottom plate 5, the clamp 7 is lifted by the buffer pin 8. Two cutting knives 9, 10 are rigidly fixed on the plate 5. The knife 10 is fixed at the material supply level, and the knife 9 is mounted at a distance L under insert 4 so that it the cutting edge is located below the bending edge of the matrix 6 at a level that provides a segment of the inter-detail jumper at the end of the bending. The clamp 7 moves in the guides 11. The knife 9 also serves as a guide. The cutting edges of the knives 9, 10 and inserts 3, 4 are located on one side of the bending punch 2 and the matrix 6 on the supply side of the material 12. On the knife 9 there is a slit for the removal of the inter-part jumper 13, and the finished part 14 is removed from the initial level into the container.

 The stamp works as follows. The strip 12 is supplied per step, which is provided by stepping knives and an emphasis / not shown /. During the course of the upper plate 1 with the bending punch 2 and inserts 3, 4 down, the first part 14 of the strip 14 is cut by the cutting edges of the insert 4 and knife 10, then the process of forming the interaction of the bending punch 2 and matrix 6 with the part 14 proceeds, the side shelves are flexible, at the end of the stroke of the punch 2, the inter-detail jumper 13 is cut off by the cutting edges of the insert 3 and knife 9. The cut jumper 13 along the slice of the knife 9 is rolled into the waste bin, and the finished part 14 is returned to its original level and removed by moving the strip 12 by one step. On the part of the removal of finished parts, the stamp has free space, which is not contaminated by auxiliary exhaust means, which increases reliability and productivity, since waste and finished parts are removed from the stamp at different levels in different directions. The movement of the part 14 to the initial level is carried out by means of a buffer pin 6 and a clip.

Claims (1)

 A stamp for cutting and bending sheet metal parts containing a bending punch with two cutting edges fixed to the upper movable plate, a die and two cutting knives with cutting edges on the lower fixed plate, and a waste removal means, characterized in that the upper movable plate is provided rigidly fixed inserts located on one side of the bending punch and the matrix, the cutting edges of which are located at a distance L equal to the length of the inter-detail jumper at the same level as the bending plane the punch and on one side of it and the matrix from the supply side of the material, while the cutting knives are fixed so that the cutting edge of the first knife is located at the level of material supply, and the cutting edge of the second knife is located at the same distance L from the cutting edge of the first knife below the bending the edges of the matrix at a level that provides a piece of inter-detail jumper at the end of bending.