SU1016073A1 - Die for dynamic hot compacting of metallic powder - Google Patents

Description

The invention relates to powder metallurgy, in particular to dies for the manufacture of articles by dynamic hot pressing of powders. ,

A stamp is known for dynamic hot pressing of metal powders, comprising lower, middle and upper plates, guide columns, a die, a needle, a punch, a power device made in the form of preloaded belleville springs mounted between lower and middle plates Li,

The disadvantage of this stamp is low reliability of operation, due to the rapid deactivation of the disk springs of the power device and the complexity of manufacturing this device.

Closest to the proposed technical essence and achievable. The effect is a stamp for dynamic hot pressing of metal powders, including a matrix of upper and lower punches, a central core, upper and lower plates, an ejector system with pushers and springs 2.

However, the ejector system is rigidly connected to the press ejector through an adapter, which complicates the installation of a stamp on the press. For the fabrication of the joints, the exact execution of the joining elements is necessary. In addition, the stamp is unreliable in operation.

The purpose of the invention is to simplify the MOUTH and increase the reliability of the stamp.

 The goal is achieved by the fact that in the die for dynamic hot pressing of metal powders, including an upper and lower punches, a central core, upper and lower plates, an ejector system with pushers and springs, an ejector system is provided with a weight and the pushers are fixed at the lower ends in the latter, and the upper connected to the lower punch.

The drawing shows a stamp for dynamic hot pressing of metal powders.

The stamp consists of the upper plate 1, on which the upper punch 2 is fixed with the help of the Z-ring. On the supporting middle plate, in the cage 5 is installed-. Lena matrix 6, supported by the sleeve 7 and the base plates 8 and 9 In the working hole of the matrix 6 is a hollow lower punch. 10, sliding along the central shaft .11 attached to the middle plate k with the backing plates 8 and 9. The punch ejecting system contains a load 12, pushers 13 and a hollow lower piano 10, which is attached to the upper ends of the pushers 13 with a ring k and a ring 15 The lower ends of the pushers 13 are connected to the load 12 and pressed against the lid 16. The middle plate 4 rests on the bottom plate 17, in which there is a through hole for the free movement of the load 12. The load 12 can move under the action of a press ejector (not shown). To return the load and lower punch to the initial position, the pushers are additionally equipped with return springs 18.

In order to obtain stable dimensions of the parts produced, support plates 19 and 20 are provided, which fasten the ring 3 and the holder 5, respectively. The stamp is fixed with the upper plate 1 to the press slide and the lower plate 17 to the press table.

The stamp works as follows. Before the start of the working cycle, plate 1 and 1 with the upper punch 2 attached to it are in the upper position. The lower punch 10 under the weight of the load 12 and the return springs 18 op-;

5 puppy in the lower position. The heated porous part of metal powder is fed into the cavity of the matrix 6. When the press ram moves down, the upper punch 2 moves and the workpiece is pressed in (dynamic hot pressing). The movement of the press ram occurs before the contact of the supporting plates 19 and 20. The part presses the central rod 11

 and remains on it. The movement of the press ram starts upwards. Top. the punch 2 exits the die 6, after which the press ejector is engaged and raised. He rests

P into the lid 16 of the load 12, which rises together with the pushers 13 associated with it, compressing the return spring 18. At the same time, the lower punch 10 begins to move, pushing

5, the finished part is from the central rod 11. The part is withdrawn from the cavity of the matrix 6 and discharged into the cooling liquid. After that, the press pusher lowers, return springs

3 V, 1016073;. ,, 4

18 expands and, under the action of the group, the proposed stamp increases, the naza 12 pushers 13 and the lower punch-operation "ease of installation 10 returns to its original position. On the press, ease of maintenance. The porous part is simplified to simplify the design of the ejector to the installed system. Pressing is repeated separately from the press ejector.

Claims (1)

STAMP FOR DYNAMIC HOT PRESSING OF METAL POWDERS, including a matrix, upper and lower punches, a central rod, upper and lower plates and an ejection system with pushers and springs, characterized in that, in order to simplify installation and increase the reliability of the work of the die, the ejector and the pushers with the lower ends are motionlessly mounted in the latter, and the upper ones are connected to the lower pointe.