Die set for equal-duct angular pressing (variants)

FIELD: plastic metal working with use of intensive plastic deformation, namely manufacture of nano-crystalline materials with improved degree of mechanical properties.

SUBSTANCE: die set includes slider and plate restricting inlet duct; stationary stop closing inlet duct and restricting together with plate outlet duct; ram and member for knocking out blank. Said member is joined with motion drive unit and it is mounted with possibility of introducing into additional through duct formed in slider. According to first variant of invention at initial position of slider its through duct is arranged in front of outlet duct. Slider may be shifter before starting pressing process by value exceeding size of through duct. According to second variant of invention through duct of slider is arranged in front of outlet duct in lower limit position of slider. Said cone-shape through duct of slider is closed by means of plug pressed-in to it.

EFFECT: improved design providing possibility for extracting last blank out of outlet duct before starting pressing of next lot of blanks.

2 cl, 5 dwg

 

The invention relates to the processing of metals by pressure with the use of severe plastic deformation and is intended to obtain nano-crystalline materials with enhanced mechanical properties of various metals and alloys.

A device for hardening the material plastic deformation by A.S. USSR №902884, IPC 7 21 25/00 from 13.06.80, publ. In BI No. 5, 1982, contains a container with a curved end-to-end channel bounded by two concentric and two parallel walls, and rolling elements in the form of packets of high-strength flexible strips that are installed in grooves made in each parallel to the channel wall concentric with him.

The disadvantage of this device is the negative influence of friction in the entrance channel between the wall and the face of the workpiece. Such pairs in unit two. Working pressure on the tool and particularly to a press-stamp depend essentially on the contact conditions in the input channel. And, as a consequence, there is a greater likelihood of breakage of the press stamp when performing extrusion billet.

In the technique known device in which the contact friction between the wall of the entrance channel and the face of the workpiece are eliminated more than two pairs.

Famous stamp in the book.: A plastic structure formation metals, Wmel, etc, Mn.: Nauka 1 tajska, 1994 - ISBN5-343-01164-0, p.106-107 contains pultusku with a U-shaped channel forming with the plate of the input channel, and the plate together with a fixed focus, overlapping input channel, forms the output channel, and press the stamp.

The disadvantage of this stamp is that it does not stipulate the possibility of extracting the workpiece from the output channel after pressing. As a result, after the pressing of the party of blanks in the output channel is not extracted from his last billet, since removing the workpiece is performed at the next pressing cycle subsequent blanks or special from other material. When pressing another batch of workpieces from a material different brand should be at the heating temperature of the workpiece and the stamp in excess of the melting point is not extracted billet, its presence in the stamp is invalid.

The problem solved by this invention is to achieve an appropriate work environment.

Technical result achieved when using the present invention is to provide opportunities for extracting from the output channel of the last blank before pressing the next batch of blanks.

The above technical result is achieved by the fact that the stamp for channel what about angular pressing, contains pultusku and plate forming the input channel, a fixed stop on the input channel and formed with a stove output channel, and press the stamp, additionally, the element is made to eject the workpiece connected to the drive motion and installed with the possibility of the entrance of the entrance channel, in addition made in Polushka so that when the initial position, poloski it is located opposite the output channel, and Polushka configured to shift before pressing on the amount exceeding the size of the flow channel.

This same result is achieved by the fact that the stamp for equal-channel angular pressing, containing pultusku and plate forming the input channel, a fixed stop on the input channel and formed with a stove output channel, and press the stamp, additionally, the element is made to eject the metal from the output channel connected to the drive motion and installed with the possibility of the entrance of the entrance channel, in addition made in Polushka so that in the lowest position of poloski it is located opposite the output channel, while a passage is made conical and covered with pressed-in tube.

Supplementary performance element to eject the workpiece has provided the capacity is ü the implementation of the removal of the workpiece from the output channel. The connection element with the drive move provided the opportunity of making his move. The item is installed with the possibility of the entrance of the entrance channel, in addition made in Polushka so that when the initial position, poloski it is located opposite the output channel provides the possibility of interaction of the element with the workpiece while removing the last of the output channel. Performing poloski with shift before pressing on the amount exceeding the size of the flow channel, provided the exhaust passages from the zone of intensive plastic deformation of the workpiece and thus ruled out the possibility of being hit by a material during pressing. This embodiment of the passages provided for the possibility of extracting the workpiece at the initial position, poloski after returning poloski from extreme lower position. The difference of the second variant the execution of the stamp from the first is the implementation of the flow channel in Polushka so that in the lowest position of poloski it is located opposite the output channel. This embodiment of the passages provided for the possibility of extracting the workpiece at the lowest position of poloski to return to its original position. Execution at Polushka flow channel is tapered and overlapped request is Savannah him stopper ruled out the possibility of being hit by a material during pressing.

Figure 1 shows a die equal-channel angular pressing, in the initial position (option 1); figure 2 - the same, top view (option 1); figure 3 - the same, when you start pressing (option 1); figure 4 shows a die equal-channel angular pressing, in the initial position (option 2); figure 5 is the same (option 2), at the end of pressing.

Stamp (see figure 1, option 1) contains pultusku 1, plate 2, a fixed focus 3 and press the stamp 4. Polushka 1, in which the U-shaped groove, with the plate 2 formed input channel 5. Fixed focus 3 on input channel 5, formed with the plate 2 output channel 6. All of the above parts are mounted in a sleeve 7, which is pressed into the brace 8.

In addition, there is the element, which is connected to the actuator displacement. In this case, they represent the core 9 and the screw 10, made in one piece. The rod 9 is installed with the possibility of the entrance of the entrance channel 11, is made in Polushka 1. The rod 9, in the initial position, poloski 1, is located opposite the outlet channel 6. The screw 10 is placed in the threaded hole made in the brace 8.

Polushka 1 is arranged to shift before pressing on the value of L larger than the flow channel M

To return poloski 1 to its original position applied proj is 12. The workpiece 13 in the initial position is set in the input channel 5. Stamp (see figure 4, option 2) contains pultusku 14, plate 15, a fixed stop 16 and press the stamp 17. Polushka 14, in which the U-shaped groove, with the plate 15 has formed a working channel 18. The fixed stop 16 on the working channel 18, formed with the plate 15 output channel 19. All of the above parts are mounted in a sleeve 20, is pressed into the brace 21.

In addition, there is the element, which is connected to the actuator displacement. In this case, they represent a core 22 and a screw 23, made in one piece. The rod 22 is installed with the possibility of the entrance to a passage 24, made in Polushka 14. A passage 24 is made conical and covered with pressed-in tube 25. The rod 22 at the lowest position of poloski 14 is located opposite the outlet channel 19. The screw 23 is placed in the threaded hole made in the brace 21.

To return poloski 14 to its original position applied by the spring 26. The workpiece 27 in the initial position is set in the input channel 18. The drive movement of the elements 8 and 22 (see figures 1 and 4) may be performed in various versions, for example, in the form of a pneumatic cylinder (not shown).

As the element to return porzucek 1 and 14 to the initial position can also be used, for example, t is ha passed through the hole in Polushka connected at one end with the press slide and at the other end with a stop (not shown).

Stamp (see figure 1 and 2) works as follows.

The workpiece 13 during pressing can be cold or hot conditions. Pressing the workpiece 13 in a cold state are also not in a heated stamp.

Heating of the workpiece 13 to high temperatures (several hundred ° (C) can be performed in the furnace, installed separately from the heated stamp or directly in the stamp placed in a tubular furnace (not shown).

When the influence of the press slide (not shown) with a force P at a press stamp 4 last, interacting with poloskei 1, moves the latter downward. When you move poloski 1 (see figure 3) at a distance of L a passage 11 extends from the zone of intensive plastic deformation of the workpiece 13, and then press the stamp 4 interacts with the workpiece 13. During the further course of the press slide the workpiece 13 is pushed into the output channel 6 of the same cross-section. This Polushka 1 will appear in the bottom part of the brace 8. The stroke of the press stamp 4 is carried out until the upper level of the outlet channel 6. When reverse motion of the press slide Polushka 1 will return to its original position under the action of a spring 12. Predeterminado the workpiece 13 is pushed from the output is the anal 6 by pressing the following blanks, etc.

In this case, to retrieve the last of the workpiece from the output channel 6, you must perform the following steps :

Before pushing the workpiece pultusku 1 return to its original position. For this purpose, the press slide is moved up. Polushka 1 occupies its original position under the influence of spring 12. The workpiece is pushed by a rod 9, which during the rotation of the screw 10 is included in the entrance channel 11 and interacts with it. After the ejection of the workpiece from the output channel 6 screw 10 returns to its original position.

Stamp (see figure 4) is as follows. The workpiece 27 during pressing can be cold or hot conditions. Pressing the workpiece 27 in a cold state are also in unheated stamp.

Heating of the workpiece 27 to high temperatures (several hundred ° (C) is carried out in a furnace mounted separately from the heated stamp, or directly in the stamp placed in a tubular furnace (not shown).

When the influence of the press slide (not shown) with a force P at a press stamp 17 last interacts with poloskei 14 and the end face of the workpiece 27 shifts the first in the lower end position, and the second push into the output channel 19 of the same cross-section. The stroke of the press die 17 is carried out until the upper level of the outlet channel 19. Predeterminado the workpiece 27 in talkabout from the output channel 19 in the subsequent pressing of the workpiece. Then carry out the pressing of the next workpiece 27 and so on

In this case, to retrieve the last of the workpiece from the output channel 19 you must perform the following steps :

The workpiece is pushed by a rod 22, which during the rotation of the screw 23 is included in the entrance channel 24 and communicates with him through the tube 25. After the ejection of the workpiece from the output channel 19 of the screw 23 and the tube 24 will return to its original position.

When reverse motion of the press slide Polushka 14 returns to its original upper position under the influence of spring 26. For this purpose, the press slide is moved up.

After several such technological transitions of each batch of workpieces 13 or 27 derived from these products with reinforced metal properties.

The use of this invention made it possible to extract from the output channel of the last blank before pressing the next batch of blanks.

1. Stamp for equal-channel angular pressing, containing pultusku and plate forming the input channel, fixed focus, overlapping the input channel and forming with the plate output channel, and press the stamp, characterized in that it additionally made element to eject the workpiece connected to the drive motion and installed with the possibility of the entrance of the entrance channel, the stage is niteline made in Polushka thus, when the initial position, poloski it is located opposite the output channel, and Polushka configured to shift before pressing on the amount exceeding the size of the flow channel.

2. Stamp for equal-channel angular pressing, containing pultusku and plate forming the input channel, fixed focus, overlapping the input channel and forming with the plate output channel, and press the stamp, characterized in that it additionally made element to eject the workpiece connected to the drive motion and installed with the possibility of the entrance of the entrance channel, in addition made in Polushka so that in the lowest position of poloski it is located opposite the output channel, while a passage is made conical and covered with pressed-in tube.



 

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