SU749578A1 - Die for cutting tubes - Google Patents

Description

(54) STAMP FOR CUTTING PIPES

one

The invention relates to the field of blank production of machine-building plants, namely, devices for cutting pipes.

A known stamp for cutting pipes into workpieces, containing a base, a housing mounted on it with a fixed knife mounted in it, a movable knife, and a mandrel in two parts, one of which is installed in the pipe being cut and the other in the cut workpiece 1.

The aim of the invention is to increase productivity and reliability in operation.

For this, the stamp is provided with a stopper that is pivotally mounted on a stand fixed on the base, with the ability to interact in a horizontal position with a part of the mandrel mounted 5 in the cut-off workpiece, while the movable knife is made of two spring-loaded one relative to the other inserts with a horizontal connector, The fixed blade is made of vertically-spaced spring-loaded liners in the wedge grooves.

FIG. 1 shows a stamp in the initial position, a general view; in fig. 2 - the same in

the moment the billet is separated from the pipe; in fig. 3 - section A-A of FIG. one; in fig. 4 - section BB of FIG. one.

The stamp for wasteless cutting of tubes includes a cutting mandrel made of a stationary part 1 and a movable part 2, which is in contact with a movable stop, a stripper 3, which is fixed in a horizontal position by the hinge 4. The hinge axis is mounted on a rack 5, mounted on a base 6, in which there is a window 7 for removing products. The stationary knife 8 is made with a differentiated clamp and consists of the right 9 and left 10 inserts, the expansion of which is carried out by springs 11. The stationary knife is installed in the fixed case 12.

Claims (1)

The movable knife 13 consists of an upper part 14 with an insert 15 installed therein, a lower part 16 with an insert 17. The upper and lower parts of the movable knife are separated by springs 18. The movable knife is fixed in the initial position by springs 19. The stroke of the upper part of the movable knife is limited by the stop 20 and a movement limiter 21. The cut workpiece 22 is separated from the pipe 23, removed by an abutment-remover 3. The stationary 1 and the movable 2 parts of the mandrel have centering jaws 24. The stationary 1 and the movable 2 parts of the cutting mandrel are installed in the inner field pipe 23. Initially, the end of the movable part of the cutting mandrel is oriented along the plane of the end part of the pipe, and together with the pipe is brought to the stop - puller 3. Both parts of the cutting mandrel are fixed inside the pipe by centering jaws 24. The press slider (not shown) moves the upper part 14 of the movable knife 13, compresses the springs 18, the pipe is tightly compressed between the inserts 15 and 17. After the pipe has been compressed tightly, the entire movable knife 13 will begin to move, compress the spring 19 and carry the pipe. The tube is compressed between the inserts 9 and 10 of the fixed blade 8 with a differentiated clamp, while the springs II are compressed. The inserts 9 and 10 of the stationary knife are moved along the inclined planes of the stationary body 12. A differentiated clamp is made to tightly crimp the pipe. After a tight compression of the pipe in the movable knife 13 and the stationary knife 8, when the movable knife is further lowered, the workpiece 22 is separated from the pipe 23. When the press slide returns to its original position, the springs And 18, 19 return all parts of the fixed knife 8 and the movable knife 13 the initial position, this ensures the coaxiality of the cut billet and the pipe and releases the clamps of the stationary 8 and the movable 13 knives. A feed mechanism (not shown in the drawing) of the billet feeds the pipe for one feed stroke, while removing the cut piece. The stroke of the upper part of the movable knife is limited by the stop 20 and the movement limiter 21. When the tubular billet is fed into the die, the cutting mandrel rests against the abutment 3, remains stationary relative to all parts of the die, thereby the plane of the movable and stationary parts of the cutting mandrel remains unchanged and coinciding with the cutting plane, which make up the movable and fixed knives. The stop - puller 3 is fixed in a horizontal position by the hinge 4. The product is removed during a subsequent cut cycle due to the rejection of the stop - puller from the horizontal position through the window 7 in the bottom plate 6. Return of the stop - puller to the horizontal position (return mechanism is not shown in the drawing) occurs when the movable knife returns to its original position. At the same time, before starting the supply of the pipe to the chip plate, the contact between the stop-puller and the end of the moving part of the mandrel is resumed. The design of the chipboard has high performance and reliability in operation. Claims of the Invention A stamp for cutting pipes into workpieces, comprising a base, a housing mounted thereon with a fixed knife mounted therein, a movable knife, and a mandrel in two parts, one of which is installed in the pipe being cut and the other in the cut workpiece, differing in that, in order to improve performance and reliability of work, it is equipped with an orifice plate mounted pivotally on a rack fixed on the base, with the possibility of interaction in its horizontal position with a part of the mandrel, the movable knife is made of two inserts springed one against the other with a horizontal connector, and the motionless knife is made of spring-loaded inserts vertically placed in the wedge grooves of the body. Sources of information taken into account in the examination 1- USSR Author's Certificate No. 499062, cl. On 23 D 23/04, 1973.