Device for pressing articles of powder materials

 

(57) Abstract:

The inventive shape, formed by the matrix 1, the lower punch 3 and the rod 4, the top is filled portion of the powder, then on the inner surface of the matrix is set to the liner 5 to contact with the agreed matrix surface, then set the insert 7 and filled the rest of the powder. The upper punch 2 and the lower punch 3 is applied force and is pressing part 6. The matrix is made with the protrusion on the inner surface and has a diameter cavity in the upper part larger than the diameter of the lower part. Forming the liner 5 is made with a locking connector and posted on the ledge. The insert 7 is installed in the cavity of the matrix at the top of the ledge. 2 Il.

The invention relates to powder metallurgy, in particular to a press-forms for the manufacture of workpieces of complex shape pressing of the powder.

Known mold for pressing workpieces from a powder, comprising an upper and a lower punch, the matrix is placed in her ear, a die-holder with vertical channels and copiers, kinematically connected with the upper punch set with the ability to interact with powder, include a matrix, hollow punch, rod and deforming the site, made in the form of alternating between the rings of the tool material and the material having the effects of shape memory, for example, from nitinol [2]

Most similar to that proposed by the technical nature of a mold for pressing powders comprising a composite matrix covered resistant glass, ring, liner, ring punches mounted on the rod, and one part of a matrix made spring-loaded in the axial direction [3]

The disadvantage of the mold is that when moving the upper and lower parts of the matrix together with the liner may be any particles of powder between them, which leads to a change of the dimensions of the part, as well as more complex supressive details.

In contrast to known solutions, the proposed device containing a composite matrix, the upper and lower annular punches, the rod and the annular forming the liner is placed on the inner surface of the matrix according to the invention the matrix is supplied with an insert made from a ledge on the inside of the working surface and has a diameter cavity in the upper part of larger diameter of the insert is installed in the cavity of the matrix at the top of the ledge.

In Fig. 1 shows the device, the section of Fig. 2 the construction of the liner.

The device comprises a matrix 1, upper 2 and lower 3 punches, pin 4, the liner 5, the insert 7 and the yoke 8.

The device operates as follows. In shape, formed by the matrix 1, the lower punch 3 and the rod 4, the top is filled portion of the powder, then on the inner surface of the matrix 1 is inserted into the liner 5 to contact with the agreed surface of the matrix 1. After this is inserted into the insert 7 and filled the rest of the powder, applied force to the top 2 and bottom 3 of the punch and is pressing part 6. Depending on the configuration of the received items, you can make the filling powder when installed the liner 5 and the insert 7. After pressing, the upper punch 2 is raised, and the bottom 3 along with the liner 5 and box 7 vyrisovyvaet the finished product.

DEVICE FOR PRESSING articles of POWDER MATERIALS containing composite matrix, the upper and lower annular punches, the rod and the annular forming the liner is placed on the inner surface of the matrix, wherein the matrix is made with the tab on the inside of the working surface and has exyreme connector and placed on the projection matrix, as the insert is installed in the cavity of the matrix at the top of the ledge.

 

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FIELD: powder metallurgy, namely apparatuses for pressing powders.

SUBSTANCE: apparatus includes movable and stationary plates, upper and lower punches, pressing block in which die is arranged. Pressing block has two part; upper of said two parts is secured to movable plate and lower part is secured to stationary plate. In one part of block there is additional drive unit for moving punch in plane normal relative to motion direction of movable plate. Pressing block is provided with two carriages placed in guides with possibility of motion in two mutually normal directions. One carriage is arranged in guides of second carriage. Each part of pressing block has four profiled supports. Die is in the form of four shaping members with flat working surfaces. Said members are mounted on profiled supports in such a way that their working surfaces form closed loop. Each member has slit guide normal relative to its working surface and stem mounted in slit guide of adjacent member. Working surface of shaping member coincides with one surface of its stem.

EFFECT: increased density of pressed blanks, enhanced uniformness of density distribution in volume of blank.

2 cl, 4 dwg

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