SU1177001A1 - Automatic die - Google Patents

Description

The invention relates to the cold processing of metals by pressure and can be used in particular for embossing oil grooves in bimetallic bushings for the top head of connecting rods of diesel engines.

The purpose of the invention is the expansion of technological capabilities by ensuring the possibility of obtaining a profile on the inner surface of the parts.

FIG. 1 shows an automatic stamp, general view; in fig. 2 - the same, top view; in fig. 3 is a section A-A in FIG. one; in fig. 4 is a section BB in FIG. one.

The punching machine comprises a lower plate 1, an upper plate 2, a punch 3, a die 4, a power cylinder 5, an ejector 6, a loading 7 and a discharge 8 trays.

On the bottom plate 1 there are mounted guide columns 9, along which the top plate 2 moves. On the bottom plate 1, the guide rails 10 of the punch 3, the body 11 of the dogs 12, the pillar 13 of the punch 3, the ejector axis 14 of the ejector and the bracket 15 of the loading tray 7 are fixed. on the bottom plate 1 on the bracket 16 is mounted a power cylinder 5. In the bottom plate 1 there is a transverse groove 17 of rectangular cross section with an inclined plane in which the discharge chute 8 is installed, and a vertical hole 18 in which the buffer 19 is mounted.

The punch 3 is made in the form of a gate, in front of which there is a console 20 of rectangular cross section for mounting the sleeve blank. On the console 20 of the punch 3, chamfers 21 are made from above, which limit the ribs on both sides, which serve to emboss the grooves on the inner surface of the sleeve blank.

The front of the console 20 of the punch 3 is in the groove of the support 13 and rests on it at the time of embossing the grooves. The punch 3 has guide rails on the sides, which move in the guide bars 10. The cross-sectional height of the back of the punch 3 is larger than the front. On the upper plane of this part of the punch 3 is supported by the lower billet blank, located in the loading tray 7.

Right back on the punch 3 fixed stop 22 with a bevel, which interacts with the ejector 6. The punch 3 is connected with the rod 23 of the power cylinder 5.

The billet sleeve, worn on the console 20 of the punch 3, is installed in the working area of the stamp between the front cut of the guide poloski of the punch 3 and the rear plane of the support 13. In this case, the bushing blank is supported on a spring-loaded buffer 19.

In cases 11, spring-loaded pawns 12 are installed with the possibility of rotation in the horizontal plane. Springs 24 act on the long shoulders of pawls 12, on whose short arms there are bevels. Dogs 12 serve to force the finished workpiece sleeve from the punch 3 in the event that, for whatever reason, the workpiece sleeve will move with the punch 3.

The bevels on the dogs 12 are used to ensure the movement of the workpiece sleeve installed on the console 20 of the punch 3, in the working area of the stamp. The ejector 6 serves to push the finished billet billet into the discharge tray after removing it from the punch 3. It is L-shaped and fixed to the bar 25, and the latter is mounted on the axis 14. A spring 26 is attached to the bar 25, which serves to return the ejector 6 initial position. On the axis 14 is set at an angle to the strap 27, which interacts with the stop 22 of the punch 3.

The loading tray 7, mounted on the bracket 15, serves for gravitational movement of the workpieces of the sleeves, has a rectangular cross-section and is curved in the front part along the arc of a circle. The front and rear walls of the loading tray 7 are elongated and arranged on both sides of the punch 3 in order to keep the lower billet blank, which has fallen on the bottom pl * tu 1, in the same plane as the punch 3.

The buffer 19, mounted in a vertical hole 18 of the bottom plate 1, serves to raise the billet blank on the punch 3 up after embossing the grooves in order to ensure free movement of the punch 3 relative to the bushing blank back. To do this, the buffer 19 has a spring 28, which is compressed by the sleeve billet at the time of embossing.

On the top plate 2, the matrix 4 is fixed on the bottom, which at the bottom has a socket, made along the outer radius of the sleeve blank. On the top plate 2 on top of the installed shank 29, which serves to connect the top plate 2 of the stamp with the slider press.

The stamp machine works as follows.

Turns on the power cylinder 5. The rod 23 moves back the punch 3. As soon as the front cut of the punch becomes behind the rear cut of the bottom blank of the sleeve 30, the latter is lowered to the bottom plate 1 by the force of gravity and held in this position by the walls of the loading tray 7.

Power cylinder 5 is switched to reverse. When moving the punch 3 forward, its console 20 enters into the workpiece of the sleeve 30. The latter moves forward with the front cut of the guide tracks of the punch 3 until it stops in the back plane of the support 13. When moving forward, the workpiece of the sleeve 30 with its front cut, acting on the bevels of the dogs 12, turns them

1177001

on the axis. Springs 24 dogs 12 are compressed. After passing the workpiece sleeve 30 of the dog 12 under the action of expanding springs 24 returns to its original position.

The console 20 of the punch 3 is included in the groove of the support 13. The blank of the sleeve 30 rests on the spring-loaded buffer 19. The drive of the press is activated. Press slide moves down the top plate 2 with the matrix 4. Last, acting on the workpiece sleeve 30, presses its inner surface to the edges of the punch 3. Produced chasing grooves on the inner surface of the workpiece sleeve 30. While the spring 28 of the buffer 19 is compressed.

When moving the press ram up the top plate 2 with the matrix 4 rises up and the workpiece sleeve 30 under the action of the expanding spring 28 of the buffer 19

lifted on the console 29 of the punch 3. The power cylinder 5 when switching to the reverse travel moves the punch 3 back. The latter comes from the workpiece sleeve 30.

5 Simultaneously, the stop 22 of the punch 3, acting on the bar 27, rotates the bar 25 with the ejector 6, unclenching the spring 26. As soon as the punch 3 leaves the workpiece of the sleeve 30, the ejector 6 pushes

Yu last in the discharge chute 8.

If the workpiece sleeve 30 after embossing

for some reason moves with the punch 3, then the pawl 12, acting on the rear section, keeps it from moving and it will also be pushed out by pushing 15 lem 6 into the discharge chute 8.

The invention provides an extension

technological capabilities by providing the possibility of obtaining a profile on the inner surface of parts.

Fig2

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Bb

Claims (2)

1. STAMP-AUTOMATIC mainly for the production of parts such as sleeves, containing upper and lower plates with a punch and die mounted on them, means for feeding the blanks, equipped with a drive in the form of a power cylinder, as well as an ejector of finished products, characterized in that technological capabilities by providing the possibility of obtaining a profile on the inner surface of parts, the ejector is made in the L-shape, connected to the bottom plate by means of a spring-loaded plank and installed with the possibility of rotation in the horizontal plane and interaction with the punch, the punch is mounted on the bottom plate with the possibility of reciprocating movement and rigidly connected with the means of supplying blanks, each made in the form of a console of rectangular cross-section, having from the top plate shape motif ribs. 2. Automatic stamp on π. 1, characterized by the fact that the bottom plate is provided with a support with / groove for the console. 1 1177001