DE2261814A1 - DRAWING DIE HOLDER FOR WIRE DRAWING MACHINES - Google Patents

Description

TECfINOFIL S. p. A. ASCOLI PICENO (Italy)

DRAWING STONE AGE FOR WIRE DRAWING MACHINES

The present invention relates to a die holder for wire drawing machines.

As is well known, wire drawing machines are used for drawing metal wires, for example made of copper. The starting cross-section or inlet diameter is thereby of the wire is reduced to the final cross-section or finished diameter by passing it through a suitable Number of drawing stages runs and at the same time lubricates and cools.

In order for the pull to work properly, the metal wire must be adequately lubricated and / or cooled; Besides that no vibrations may occur »

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In the known wire drawing machines, the metal wire cooled and / or lubricated by placing the drawing dies in a water bath be immersed or by emulsifying with water Lubricating oil is sprayed onto it from the outside.

However, the systems known up to now have some

split up. Reim use of drawing dies with spray cooling lubrication the wire is cooled down insufficiently. With the water bath cooling, the fast running wire is not sufficiently lubricated. The rotating movement of the pulling drums causes eddies and cavitation phenomena in the Coolant.

Vibrations occur in conventional wire drawing machines because the wire at the entry and exit of the die holder is not exactly aligned with the die ' and because the die holder is not aligned with the drawing drums.

The problem to be solved was to find a die holder with sufficient lubrication and / or cooling, the at the same time prevents the occurrence of vibrations. The die holder according to the present invention satisfies this task and is designed for this purpose in such a way that it can take advantage of the spray cooling lubrication with those the cooling and / or lubrication in the water bath connects.

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The lubrication and / or cooling of the wire to be drawn takes place with the help of a pressure circulating lubricant and / or Coolant inside a container which is arranged in the drawing die holder. The coolant and / or lubricant runs under pressure from the wire inlet and outlet openings in the die holder, so that the wire is lubricated before drawing and cooled after drawing, so that it is under the best conditions to go to the next drawing stage. The draw frame is used so that no vibrations occur designed in such a way that the wire at the inlet and the outlet w ^ rd w ^ rd and therefore always exactly on the drawing die stays aligned.

The present drawing die holder is with the help of an elastic The carrier is adjustable on the wire drawing machine so that it can be aligned with the drawing drums, so that no more vibrations occur on the drawing die. The present invention relates to a die holder for wire drawing machines, consisting of a body attached to the turning machine, in which a drawing die is fixed Position is housed, and one wire inlet and Wire from 1auföffining, this drawing die holder is characterized by the fact that inside this body at least: ·? has a container with a line for the influence of a cooling and / or

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or lubricant is connected; the die holder is also characterized in that the wire inlet and outlet openings are aligned with the above drawing die and that is between the above body and the wire drawing machine an elastic body is located. jThe die holder according to the present invention is will now be described in more detail with reference to the accompanying drawings. It states:

Fig. I: the sketch of a die holder according to the present Invention, which is arranged between two drawing drums of an ordinary wire drawing machine; FIG. 2: a drawing die holder, partly in section along the line II-JI in FIG. 1; FIG.

Fig. 3: a section along the line III-III in Fig. 2; Fig. 4: the whole die holder in section,) essentially along the line IV-IV in FIG. 3.

The drawings show a die holder consisting of a body 10, which is arranged in a conventional manner between two drawing drums η 11 and 12, of which the Drum 12 is located at the bottom with respect to the drawing direction and rotates at a greater speed than the entire drum ll. This speed is proportional to the change in length, the wire when pulling through the die in the

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Inside the mentioned body 10 experiences λ As can be seen from Figures 2, 3 and 4, the drawing die holder according to the present invention consists in another embodiment of a hollow body composed of two halves 1.4 and 15, which are hinged to one another in 16 on one side so that they can be opened for initial wire insertion. The two parts 14 and 15 of the drawing die holder are held together with a locking device which consists of a lever 17 which in FIG. 18 is articulated to part 15 of the drawing die holder. This lever is provided with a hook which can be hooked into a projection 20 on the other half 14 of the die holder. In the embodiment shown in the figures, the body of the die holder is provided with a triangular anchor plate 21 which has openings 22 in the corners for attaching clamping screws 23 in order to attach the die holder to a support structure 24 of a conventional wire drawing machine.

As shown in Figure 2 , a body made of elastomer material, for example made of neoprene or synthetic rubber, is attached between each drawing die holder and the frame 24, with the aid of which the drawing die holder is quickly adjusted and aligned with the drawing drums 11 and 12

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can be by tightening the clamping screws 23 more or less. The drawing die holder with help is an additional feature of the body 25 mounted elastically. This prevents the occurrence of vibrations or at least the transmission of the Vibrations from each individual die holder into the interior 4 wire drawing machine prevented.

As shown in Figures 3 and 4, the interior of the die holder consists of a first chamber 26 in which a die 27 is arranged and secured in a suitable manner. The drawing die, known per se, is aligned with an inlet opening 28 or an outlet opening 29 for the wire 13 to be drawn. In addition, it can be seen from Figure 3 that the inlet opening 28 and the outlet opening 29 of the die holder have a length that is, for example, 8-15 times greater than the wire diameter, in order to guide the wire as it enters and exits the die 27 enable. This applies in particular to the inlet opening 28, in which a small socket 30 (FIG. 3) is provided in the interior of the die holder. This bushing can either be built in or machined directly out of the die holder. From Figures 3 and 4 it can be seen that a second annular chamber 31 concentrically around the inlet opening

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tion 28 of the wire 13 has formed in the body 10 around. This chamber is through suitable bores 32 with the aforementioned chamber 26 in connection and is also with a line 33 (Fig. 2 or 4) for a coolant and / or lubricant circulating under pressure, for example lubricating oil mixed with water.

In Figure 3 you can also see that the holes 32 for connecting the first chamber 26 to the second chamber 31 in a suitable manner against the center of the drawing die 27 are directed., So that the liquid flowing from chamber 31 towards chamber 26 essentially towards the wire 13 before it runs through the drawing die 27. In addition, good lubrication was achieved in tests and cooling with a drawing die according to the present invention, which with coolant and / or lubricant under a Pressure of 4-6 atm was supplied.

FIG. 1 also shows that the cooling and / or cooling fluid flowing out of the drawing die holder at the front and rear or lubricant helps to keep the wire 13 always is properly lubricated.

All images and descriptions are only exemplary embodiments and changes can be made to the structure of the die holder without exceeding the _{scope of the invention Λ}

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For example, the annular chamber 31 could be absent and the chamber 26 could be in direct communication with the line 33 for the pressure diverted lubricant and / or coolant.

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Claims (7)

PATENT CLAIMS l.jDrawing die holder for wire drawing machines, consisting of a body attached to the wire drawing machine in which a stationary drawing die is arranged and which is provided with a wire inlet and outlet opening, the drawing die holder being characterized in that this body (10) inside has at least one chamber (26) which is connected to a line (33) for the inlet of a pressurized coolant and / or lubricant. stands; The die holder is also characterized in that the inlet and outlet openings (28) or (29) of the wire ( 13) are aligned with this die (27), 2. drawing die holder according to claim 1, characterized in that this body (10) consists of two halves (14, 15), which are hingedly connected to one another. 3. drawing die holder according to claim 1 and 2, characterized by a second annular chamber (31) which is arranged concentrically around the inlet opening (28) of the wire (IG) is and through bores (32) for the flow of coolant with the chamber (26) and with the influence line (33) of the under Standing under pressure. Fluid is in communication. 309827/0378 4. drawing die holder according to claim 3, characterized in that the flow holes (22) are aligned with the pressurized fluid, which (31) and (26) put the chambers together so that the liquid to the _z u pulling wire (13) and is passed to the drawing die (27). 5. Die holder according to one or more of the preceding Claims, characterized in that the inlet and outlet openings (28) and (29) of the wire (13) the wire accompany a piece in its running direction. 6. Zi.ehsteinhal Ler after one or more of the preceding Claims, characterized in that the pressurized liquid from the inlet openings (28) and the outlet openings (29) of the wire (13) flows, and lubricates and / or cools the wire in this way .. 7 drawing die holder according to claim 1, characterized in that that the body 10 is attached to the wire drawing machine with the aid of an elastic body (25). 309827/0378