SU1592082A1

SU1592082A1 - Press tool for die forging

Info

Publication number: SU1592082A1
Application number: SU884410643A
Authority: SU
Inventors: Viktor P Babenko; Lev Ya Makshanov; Galina V Pchelintseva
Original assignee: Voronezh Proizv Ob Vypusk
Priority date: 1988-04-18
Filing date: 1988-04-18
Publication date: 1990-09-15

Description

The invention relates to the processing of metals by pressure. The purpose of the invention is to improve the quality of the parts, tool life2

That to save grease. The stamp consists of a top plate, a punch with a support and channels for the supply of lubricant, as well as a bottom plate with a die and ejector. The punch consists of a central pivotal part and a ring that encloses it. The support of the punch is made in the form of a plunger, covered by a cylinder placed with an annular gap in the housing. The cavity of the housing is connected by a pipeline with a power source. When the stamp is in operation, the lubricant cooling fluid is squeezed out of its accumulation system into the punch area. At the same time, the feed to the working area and the cavity of the obtained part is ensured. 4 il.

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The invention relates to the processing of metals by pressure, in particular to stamps for bulk forming.

The aim of the invention is to improve the quality of the parts, tool life and economy of lubrication.

Figure 1 schematically presents the proposed stamp, the lowest position (left half), and the highest position (right half); in fig. 2 - the same working position; on fig.Z - section aa in figure 2; fig 4 is the same (version).

The stamp consists of the bottom plate 1 fixed in it with the help of a clamping ring 2 matrix 3, the lower ejector 4, the top plate 5 with the upper tool unit, with - holding buffer 6 under the influence of the power cylinder (not shown) located in the press slider , disk 7, pushers 8, interacting with one side with disk 7, and the other with clip 9, in the inner cavity of which cylinder 10 is mounted. The stamp contains an annular part 11 of a punch rigidly connected to clip 9 in which a cavity 12 is formed for lubrication and oh— la of waiting for the core of the core 13 of the punch mounted on the support 14 mounted on the top plate

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four

those 5 and made in the form of the plunger of the cylinder 10. The cavity 15 is connected by a channel 16 and the pipeline 17 with a tank

18 for lubrication or lubricant-cooling fluid; The over-piston cavity of cylinder 19 is connected by channels 20 and 21 to a channel 22 "formed in the 1 G part of the punch connected by holes 23 to the cavity 12 for lubrication and cooling. The pipe 17 is equipped with a check valve 24 to prevent the displacement of lubricant back into the tank

18.

The stamp works as follows. 15

In the initial position, the stamp is open, the workpiece 25 (FIG. 2) is placed in the die 3, the punch part 11 is in the lowest position,

.t ^ e. The lower part of the support 14, made in the form of a plunger, is in its extreme upper position in the cylinder 10, which is free from lubricating — cooling fluid.

When the slider moves downwards, the punch closes. In this part 11 enters the matrix 3 simultaneously with the part 13 of the punch, creating its stable direction in the matrix.

When a billet l> meets the punch (FIG. 2), the billet is formed; its metal during the outflow acts on part I1, moving it in the direction opposite to the movement of the part 13 of the punch and with it the holder 9 with the cylinder

10. The cylinder 10 is displaced to the extreme position relative to the support 14, and the resulting over-piston cavity

19 from the tank 18 through the pipe 17, the check valve 24, the channel 16 and the cavity 15 is filled with a lubricating cooling liquid. When the slide is up (not shown), the part 13 of the punch starts moving upwards, at 45 while the part 11 remains under pressure of the buffer 6 through the disk 7, the pushers 8, the holder 9 to the received part. When moving the part 13 of the punch up creates a relative

movement between cylinder 10 and support

14. At the same time, the lubricating coolant is squeezed out by part of the support 14 through channels 20-22, holes 23 into cavity 12 to lubricate and cool part 11ι, cooling and lubricating thus part 13 of the punch, matrix 3 and the inside part of the part to be produced for subsequent forming operation a ·

After the protrusion of the support 14 of the punch touches the collar of the holder 9, the process of squeezing (displacing) the lubricant stops and the simultaneous lifting of all the elements of the upper plate 5 to the starting position begins.

Claims

Claim stamp for die forging, containing the upper drive plate with a punch mounted on it, in the plunger placed in the housing with a cavity under a cutting fluid connected by a pipeline with a power source, as well as a lower plate with a die and ejector, characterized in that that, in order to improve the quality of the parts produced, the durability of the tool and save grease, the punch is made of mounted with the possibility of relative movement of the central core part and the mounted con centrally to it is an annular part, while the central part of the punch is rigidly connected with the said plunger, the latter is rigidly connected with the upper plate, the housing is provided with a cylinder placed in its cavity, mounted concentrically with the plunger with a gap relative to the inner surface of the housing,

The central part of the punch is located relative to the annular part of the punch in the area of its lateral surface with a gap communicated by channels with the mentioned gap between the cylinder and the body and the cavity of the cylinder.

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FIG. g

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Aa

Fig.Z

Aa

Fig