SU368898A1 - THE MATRIX UNIT OF A HYDRAULIC PIPE-PROFILE PRESSA, UNIONAL '<' •: k'S ^ '-' l'l • ^ • I • ^^ '• <- • ^^^ r'?: •> &? ^ If;: '; "l : bibu-! LA -> &? ^ iii :. ..v:; ^ jBHb / U-'iO • r :: - '. ^ - h! - Google Patents

Description

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This invention relates to the field of metal forming, in particular, to a tool for hydraulic pipe profile presses.

The known matrix block contains a backing ring, an olor spacer, and a matrix, fixed on the outer conical surface into a matrix holder, sequentially installed in the matrix holder. When pressed and pressed into the matrix holder, the matrix moves along the conical surface of the matrix holder hole, and the surface of the matrix holder, as a result of high contact pressures, quickly wears out and the size of the hole increases. To provide a predetermined tension value, each die is fabricated according to the actual dimensions of the hole.

In addition, pre-pressing, necessary to replace the die, takes time in the press cycle.

In order to increase the durability of the matrix holder and reduce the time for replacing the matrix, the proposed matrix unit is provided with a cylindrical outer and inner conical surface with an interlocking ring installed between the matrix holder and the matrix. The matrix is tensioned and the gap in the matrix holder.

In the drawing, on the left, a matrix block with a matrix pressed into it is shown; a section; rim on the axis of the block - a matrix, slightly pressed into the ring before installation

in block.

In the mouthpiece / there is a support ring 2 and a matrix holder 3, in the hole of which there is a support spacer 4. A matrix 5 with a thin-walled ring 6 placed between the matrix holder 3 and the matrix 5 is in front of it.

Before installation in the block, the matrix 5 is lightly pressed into the ring 6 so that between the ring 6 and the matrix holder 3 remains

clearance 0.05 OD mm in a cylindrical fit. Then the matrix with the ring is loosely inserted into the cylindrical hole of the matrix holder 3 until the ring 5 stops against the end face. The mouthpiece 1, in which the block is fixed, is mounted on the axis of the press. The container 7 of the press presses the block to the plate 8. The blank 9 is insulated; in the container 7, when pressed against it from the side of the press-stamp. The press-button presses the die 5 all the way into the spacer 4. When

a further increase in the pressure force on the workpiece occurs pressing.

To change the matrix, the mouthpiece 1 removes the block from the axis of the press. Pushing from behind through the hole in the support ring 2 and spacer 4,

First, the matrix 5 is pressed out of the ring 6. With the contact pressure on the ring 6 — from the side of the matrix holder 3 will be less than the pressure of ring 6 on the matrix 5, the ring 6 will come out of the hole of the matrix holder 3 together with the matrix 5. Next, install a new matrix with an intermediate ring in the matrix holder . The subject of the invention is a matrix block of a hydraulic pipe-profile press containing a backing ring, a support spacer and a matrix pressed on the outer conical surface into a matrix holder, which, in order to increase the durability of the matrix holders and reduce the shift time, sequentially installed in the die holder. it has a cylindrical outer and inner conical surfaces with a ring mounted between the matrix holder and the matrix with a tension on the mat Itza and the gap in the die.

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