SU1409413A1 - Die for cutting tubes into metered billets - Google Patents

Abstract

The invention relates to the processing of metals by pressure and can be used in the blank production of machine-building enterprises for cutting pipes into blanks. The purpose of the invention is to increase the reliability of the die for cutting pipes. The stamp includes a fixed knife 2 with a movable mandrel 10 and a movable knife 3 with a fixed mandrel 12. The movable mandrel 10 is pressed against the fixed mandrel. 12 by a rod 13, which is associated with the stamp. To ensure accurate alignment of the fixed 2 and movable 3 knives and increase the reliability of the stamp, the bottom plate 1 is equipped with an adjustable stop (RF) and an additional plate 16 on which are fixed with the springs attached to the column. During the return stroke of the press ram, the upper plate 4 moves until the RU touches. Upon further movement of the press popun up, due to the inaccuracy of the slide stroke, the bottom plate 1 starts to rise through the RU 9, which, slipping along the columns, presses the springs until the slide is not. will be in the highest position. 1 hp f-ly, 3 ill. (Oh (L

Description

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The invention relates to the processing of metals by pressure and can be used in the blank production of machine-building enterprises for cutting pipes into blanks.

The aim of the invention is to increase the reliability of a die for cutting pipes.

On schematically shows a stamp for cutting pipes of a general view, with a partial cut | Fig, 2 - movable plate of the stamp, view in plan | in FIG. 3, view A in FIG. 2,

A fixed knife 2 is mounted on the lower plate of the stamp. The movable knife 3 is fixed on the top plate 4 of the P1 stamp. The shank 5 is mounted in a press slider (not shown). For rigidity

the upper 4 and lower 1 plates of the die co-20 mother of the lower plate 1, which are slit through the guide columns 6 and bushings 7. The pusher 8 serves to push the cut piece out of the movable knife 3, in order to achieve centering accuracy of the movable 3 and the stationary 2 knives on the bottom plate 1 stamp fixed adjustable stops 9, which are configured to a certain size of the stamp in its open position. In order to prevent the movable mandrel 10 inserted into the cut pipe i1 from being retracted, the mandrel 10 is pressed against the fixed mandrel 12 by the rod 13, which through the plate 14 and the extension spring J5 is connected to the die. To compensate for the excess stroke of the press, the die is provided with an additional plate 16, which, through the columns 17 fixed on it, is connected to the bottom plate 1 and is fixed on the press table. The columns 17 are fitted with springs 18, which create the necessary force to hold the bottom plate 1 in place during the opening of the stamp 5 and further in the opened position of the stamp when the press ram is excessively raised by 2-5 mm, pressing the bottom plate 1 down during the interaction of the stop 9 with the upper plate 4, thereby ensuring a guaranteed alignment of the openings of the movable and fixed knives, the Stamp works as follows.

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thirty

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s on columns 17 ,, presses out 18 until the creep of the press is in the extreme upper position. Then the cycle is repeated.

Claims (3)

Claims. 1. A punch for cutting pipes into dimensional workpieces, comprising upper and lower plates, movable and fixed knives, movable and fixed mandrels, 1 solons with sleeves and an extrusion means cut off. billet, characterized in that, in order to increase reliability, it is equipped with an additional fixed plate, and the bottom plate is equipped with an adjustable stop fixed on it, which is arranged to interact with the surface of the top plate facing the press slide, while the bottom plate installed on an additional plate, connected with it by individual columns and springing: en to an additional plate by means of springs mounted on individual columns .... 2. The POP.1 stamp, which is different in that the movable mandrel is provided by means of pressing against a fixed mandrel, made in the form of a rod, connected elastically with a fixed knife. A movable mandrel 10 with a stem 13 is inserted into the pipe 11 to be cut, then the pipe 1 is installed in a fixed knife 2. A plate 14 is pressed onto the free end of the rod 139 for stretching the spring 15. This creates the necessary pressing force of the movable mandrel. The pipe slides freely on the rod  3 and the movable mandrel 10 and manually fed into the slot of the movable knife 3.- After the impact of the press in the lower position of the punch, the cut billet is ejected from the movable knife 3 by the pusher 8 "The upper plate 4 moves upward until it touches the lugs 9. During the further movement of the press ram upward due to inaccuracy of the slide motion, through stops 9 starts up5 0 five 0 five 0 s on columns 17 ,, presses out 18 until the creep of the press is in the extreme upper position. Then the cycle is repeated. Claims. 1. A punch for cutting pipes into dimensional workpieces, comprising upper and lower plates, movable and fixed knives, movable and fixed mandrels, 1 solons with sleeves and an extrusion means cut off. billet, characterized in that, in order to increase reliability, it is equipped with an additional fixed plate, and the bottom plate is equipped with an adjustable stop fixed on it, which is arranged to interact with the surface of the top plate facing the press slide, while the bottom plate installed on an additional plate, connected with it by individual columns and springing: en to an additional plate by means of springs mounted on individual columns .... 2. The POP.1 stamp, which is different in that the movable mandrel is provided by means of pressing against a fixed mandrel, made in the form of a rod, connected elastically with a fixed knife. DUIG.Z