JPH0452023A - Device for manufacturing fine wire - Google Patents

Abstract

PURPOSE:To exactly manage the temperature of the roller dies and to improve the preciseness of the dimension of fine wire by setting the roller dies immersed in the immersing tank in which the lubricant liquid of constant temperature is supplied from the liquid temperature controlling tank with the circulating device. CONSTITUTION:The liquid temperature of the lubricant liquid 1 is controlled to the constant temperature in the liquid temperature controlling tank 3. And the lubricant liquid 1 of the constant temperature is supplied to the immersing tank 2 with the circulating device. The metallic wire material 911 is drawn to the fine wire 912 with the roller dies 92 set and immersed in the lubricant liquid in the immersing tank 2. In this time, the temperature of the roller dies 92 is going to increase by the frictional heat, but this frictional heat is dissipated in the lubricating oil. And so, the temperature of the roller dies 92 is always kept constant with the lubricant liquid 1 supplied from the liquid temperature controlling tank 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a thin wire manufacturing apparatus for producing a thin wire by drawing a metal wire.

[Prior art]

Generally, a roller die is used when drawing a metal wire into a thin wire having a circular or irregular shape.

In the conventional thin wire manufacturing apparatus, a plurality of roller dies 92 are arranged in stages along the feeding direction of the metal wire 911, as shown in FIG. Then, the metal wire 911 is drawn in stages using the roller die 92 to produce a thin wire 912.

The roller die 92 has a pair of rolls 920, as shown in FIGS. 4 and 5. Both rolls 920 are freely rotatably supported by hair rings 929. both rolls 9
A semicircular pull-out groove 921 is carved on the outer periphery of 20. Depending on the size of the drawing groove 921, the thin wire 9 after drawing
12 dimensions are determined. The size of the pull-out groove 921 and the groove gap thereof are affected by expansion or contraction of the roll 920 and the frame 925 for fixing the roll due to temperature.

Further, the manufacturing apparatus has a cooler (shown in the drawing) and is configured to inject and supply lubricating oil cooled by the cooler to the roller die 92.

This is intended to prevent the roller die 92 from rising in temperature and from wearing out.

[Problem to be solved]

By the way, in the above-mentioned conventional thin wire manufacturing equipment, even if the lubricating oil is supplied by injection as described above, the temperature of the roller die increases significantly due to the frictional heat between the roller die and the metal wire during the drawing process. Rise.

This point will be explained using FIG. 6. As shown in the figure, the temperature of the roll and frame of the roller die increases as the drawing time elapses. Furthermore, this temperature increase varies depending on the season. For example, the roll temperature in summer is higher than the roll temperature in winter.

Furthermore, similar to the rolls and frames described above, the temperatures of the lubricating oil and the metal wire also vary depending on the season.

These temperature fluctuations cause the roll and frame of the roller die, and the metal wire to expand or contract.

Also, the viscosity of the lubricating oil changes.

As a result, the dimensions of the thin line are as shown in Figure 7.

It fluctuates greatly as the machining time progresses. Also.

The dimensions of the thin wire vary greatly depending on the season.

Therefore, in conventional thin wire manufacturing equipment.

It was difficult to achieve sufficient dimensional accuracy for thin wires.

Especially when trying to obtain a thin wire with a diameter of about 1.5 mm,
The allowable error is approximately 0.01 mm.

And to keep the wire diameter within this tolerance range.

The temperature change of the roller die must be controlled within ±2°C. Therefore, temperature control of roller dies has become a serious issue.

In view of these conventional problems, the present invention enables accurate temperature control of the roller die and improves the dimensional accuracy of the thin wire. The present invention aims to provide a thin wire manufacturing device.

[Means for solving problems]

The present invention provides a roller die for drawing a metal wire into a fine wire, an immersion tank for immersing the roller die in a lubricant, and a liquid temperature control tank for controlling the temperature of the lubricant to a constant temperature. The thin wire manufacturing apparatus is characterized by having a circulation device for circulating a lubricating liquid between the liquid temperature control tank and the immersion tank.

The most noteworthy feature of the present invention is that the roller die is immersed in an immersion tank to which lubricant at a constant temperature is supplied from a liquid temperature control tank by a circulation device.

In the present invention, the roller dies include those having a circular drawing groove and those having an irregularly shaped drawing groove.

Further, in the present invention, examples of the lubricating liquid include lubricating oil and aqueous oil. The lubricating liquid has a function of lubricating the roll of the roller die during drawing, a function of adjusting the temperature of the roller die, the metal wire, etc., and a function of lubricating the bearing that supports the roll of the roller die.

A heater and a tarp for heating or cooling the lubricant are installed in the liquid temperature control tank. Then, the temperature inside the immersion tank is controlled by a liquid temperature controller.

[Effect]

In the present invention, the temperature of the lubricating fluid is controlled to a constant temperature in the fluid temperature control tank. And with the v & ring device,
Supply lubricating fluid at a constant temperature to the immersion tank.

In the immersion tank, the metal wire is punched into a fine wire using a roller die immersed in lfl synovial fluid.

At this time, the temperature of the roller die tends to rise due to frictional heat, but this frictional heat escapes into the lubricant. and,
As described above, the temperature of the roller die is always maintained at a constant temperature by the lubricating liquid supplied from the liquid temperature control tank.

Further, this also applies when the temperature changes depending on the season, and the temperature of the roller die and the temperature of the metal wire are always maintained at a constant temperature.

[Effect] Therefore, the dimensions of the thin wire drawn by the roller die hardly change.

Therefore, according to the present invention, the temperature control of the roller die is accurate, and the dimensional accuracy of the thin wire can be greatly improved. A thin wire manufacturing device can be provided.

〔Example〕

Regarding a thin wire manufacturing apparatus according to an embodiment of the present invention.

This will be explained using FIGS. 1 to 3.

The thin wire manufacturing apparatus of this example is shown in FIG.

A roller die 92 for drawing a metal wire 911 into a thin wire 912, an immersion tank 2 for immersing the roller die 92 in a lubricant 1, and a liquid temperature control for controlling the temperature of the lubricant 1 to a constant temperature. It has a tank 3 and a circulation device 4 that circulates the lubricant 1 between the liquid temperature control tank 3 and the immersion tank 2.

The immersion tank 2 has a tank body 20.

A support frame 21 is disposed within the tank body 20. On the support frame 21, a plurality of cassette-type roller dies 92 (see FIG. 4) are arranged in stages. Furthermore, a leveler 6 is disposed on the support frame 21 to straighten the thin wire 912 drawn as a subsequent process of the roller die 92.

The roller die 92 and the leveler 6 are immersed in a lubricant l, as shown in the figure.

The liquid temperature control tank 3 has a tank body 30. A cooler 31 for cooling the lubricant 1 is provided inside the tank body 30.
A heater 32 for heating the synovial fluid 1 and a temperature sensor 33 for sensing the temperature of the lubricating fluid 1 are provided. These coolers31. The heater 32 temperature sensor 33 is connected to the controller 3
Connect to 4.

The controller 34 is programmed to control the temperature of the lubricant 1 to a constant temperature.

As shown in the figure, the circulation device 4 includes a supply passage 43 for supplying the lubricant 1 in the liquid temperature control tank 3 to the immersion tank 2, and a supply passage 43 for supplying the lubricant 1 in the immersion tank 2 to the liquid temperature control tank. 3. A circulation pump 41 is interposed on the supply passage 43. Furthermore, a circulation pump 45 and a filter 42 are interposed on the delivery passage 44 . In addition, in FIG. 1, 5 indicates a feed roller, and 7 indicates a winding machine.

Since the thin wire manufacturing apparatus of this example is configured as described above, it exhibits first-order effects.

That is, as shown in FIG. 1, the metal wire 911 is fed into the roller die 92 in the immersion tank 2 by the feeding roller 5. In the roller die 92, the fed metal wire 911 is drawn into a fine wire 912 by a roll 920.

Thereafter, the thin wire 912 is fed into the reherer 6.

In the leveler 6, the fed thin wire 912 is straightened. Thereafter, the thin wire 912 is wound up by the winding machine 7.

In the above, the temperature of the roll 920 of the roller die 92 and the roll fixing frame 925 tends to rise due to frictional heat during the drawing process. However, this frictional heat
Since the lubricating liquid 1 escapes into the large amount of lubricating liquid l in the immersion tank 2, the temperature of the roll 920 and the roll fixing frame 925 does not rise.

That is, the lubricating liquid 1 has a volume several times or more larger than the volume of the roller die and the wire rod, and is flowing in the immersion tank for the above-mentioned circulation. Therefore.

The frictional heat is instantly and efficiently taken away, and the temperature of the roller die is accurately controlled.

The lubricating liquid 1 in the immersion tank 2 whose temperature has increased is forcibly returned to the liquid temperature control tank 3 via the delivery passage 44 by the circulation pump 45.

At this time, the filter 42 filters out dust in the lubricant l.

In the liquid temperature control tank 3, a temperature sensor 33 detects that the temperature of the lubricant 'a, 1 has increased and sends a signal to the controller 34. The controller 34 receives the signal and operates the cooler 31. Then, the lubricant l in the liquid temperature control tank 3 is controlled to a constant temperature.

Conversely, when the temperature of the lubricating fluid 1 drops too much, such as during winter, the controller 34 activates the heater 32.

In this way, the controller 34 keeps the lubricating liquid 1 in the liquid temperature control tank 3 at a constant temperature (for example, 20°C) throughout the year.
±2'C).

The lubricating liquid 1 in the liquid temperature control tank 3 whose temperature has been controlled as described above is sent into the immersion tank 2 via the supply passage 43 by the circulation pump 41.

In this way, the lubricant 1 at a constant temperature is transferred to the immersion tank 2.
and the liquid temperature control tank 3.

Therefore, the roller die 9 immersed in the lubricant l
2 roll 920 and roll fixing frame, L, 925
As shown in Figure 2, the temperature is maintained at approximately 20°C throughout the two year period, regardless of the passage of two processing times or seasonal changes. As shown in FIG. 1, the metal wire 911 before being drawn is also immersed in the lubricant ti, 1, so that it is maintained at about 20° C. in the same way as the roll 920.

Therefore, the τJ method for the drawn thin wire 912 is as follows.

As shown in Figure 3, there is almost no change throughout the year, regardless of the passage of processing time or seasonal changes.

That is, as shown in the same figure, when the fine wire diameter is 1.50 mm, the variation over the course of one year is about ±0.005+mn, and extremely excellent wire diameter management can be performed.
(Compare with the conventional example shown in the figure).

As described above, according to this example, the temperature control of the roller die is accurate, and the dimensional accuracy of the five thin wires 912 is greatly improved.

[Brief explanation of drawings]

Figures 1 to 3 show a thin wire manufacturing apparatus according to an example, with Figure 1 being a schematic overall explanatory diagram thereof, and Figure 2 showing the relationship between processing time and roll temperature vAo. Figure 3 is a diagram showing the relationship between processing time and dimensional change of thin wire.
4 to 7 show conventional examples, FIG. 4 is a perspective view of a roller die, FIG. 5 is an enlarged front view of the roller die, and FIG. 6 is an enlarged front view of the roller die.
Figure 7 is a diagram showing the relationship between processing time and roll temperature change.
3 is a diagram showing the relationship between processing time and dimensional change of a thin wire. 118. Lubricating fluid 267. Immersion tank 319. Liquid temperature control tank. 31, Tara 32, Heater. 33. Temperature sensor. 34, Controller. 491. Circulation device. 41.45. ,,circulation pump. 911... Metal wire. 912, thin line. 9210. Roller dice 920, roll.

Claims (1)

[Claims] A roller die for drawing a metal wire into a thin wire, an immersion tank for immersing the roller die in a lubricant, a liquid temperature control tank for controlling the temperature of the lubricant to a constant temperature, and a liquid temperature control tank for controlling the temperature of the lubricant at a constant temperature. A thin wire manufacturing apparatus comprising a circulation device for circulating a lubricant between a tank and the immersion tank.