JPH07236911A - Multi-stage wire drawing machine and multi-stage wire drawing method - Google Patents

Abstract

PURPOSE:To carry out multi-stage wide drawing from a larger wire diameter and cause no slip tension between a wire rod and a drum by controlling the circumferential speed of each stepped-pulley drum of a work drum and idle drum to be a value that is calculated from the relationship between the number of revolution and the diameter of drum. CONSTITUTION:The stepped-pulley drums of the work drum 11 and idle drum 12 are respectively divided into plural drums 13, 14, 15, 16, and revolved at respectively different number of revolution, and setting the drum diameters by which t he elongation percentage of wire rod is positioned with the mutual adjacent stepped-pulley drums are combined. Then, even when the diameter ratio of wire rode is large, the drum diameters D1-D4 can be arbitrarily set by selecting the drums 13, 14, 15, 16 of plural blocks for N1-N4 and the restriction on the bend radius of the wide rod and dimension of equipment is dissolved. That is, the occurrence of slip between the drum and the wire rod is suppressed without making the final stage of the drum large and wire drawing from the wire rod having larger diameter is enabled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention wraps a wire around a work drum consisting of a stepping drum and an idle drum consisting of a stepping drum to provide a plurality of wires provided between the work drum and the stepping drum. The present invention relates to a multi-stage wire drawing machine and a multi-stage wire drawing method in which wire drawing is performed stepwise by a die.

[0002]

2. Description of the Related Art For example, in order to draw a wire of tungsten or molybdenum, especially a thin wire, it is wound around a work drum consisting of a stepping drum and an idle drum consisting of a stepping drum, and the work drum and the stepping wheel are wound. A multi-stage wire drawing machine is generally used in which wire drawing is performed stepwise by a plurality of dies provided between the drum and the drum.

However, this type of multi-stage wire drawing machine is not a multi-stage drum in which each stage of the corridor drum has a drum peripheral speed that perfectly matches the elongation of the wire rod after passing through the die. Slip occurs between the wire and the drum surface. In other words, slippage here occurs due to the difference between the speed of the wire rod and the peripheral speed of the drum, and the speed corresponding to the peripheral speed of each stage of the rotating stage car drum and the elongation of the wound wire rod. If they match, the wire rod is sent at the same speed in response to the rotation of the drum, and no slip occurs.

However, since the peripheral speed ratio of each stage of the stepper drum is smaller than the elongation rate of the wire rod, a portion where the drum peripheral speed is faster occurs with respect to the wire rod, resulting in tension. Acts on the wire. Then, these tensions build up and become considerably large in the preceding stage, and in some cases, the wire rod is broken. That is, in order to make the multi-stage drum stage vehicle ratio equal to the elongation rate, the first stage drum diameter may be made smaller or the last stage drum diameter may be made larger, but there is a restriction in both cases. .

[0005]

In order to improve the efficiency of wire drawing, it is required to carry out multi-stage wire drawing from a thicker wire diameter. On the other hand, with difficult-to-machine materials such as tungsten and molybdenum wire, the winding diameter of the front stage of the drum cannot be made too small. Furthermore, if the stepped wheel ratio is adapted to the elongation of the wire rod, the diameter becomes extremely large in the final step, so that the stepped wheel ratio actually tends to be suppressed. The multi-stage wire drawing machine essentially has a property of winding the thickest wire diameter on a drum having the smallest winding diameter.

The present invention has been made based on the above circumstances, and enables multi-stage wire drawing from a thicker wire diameter, and the slip tension between the wire and the drum can be adjusted at a drum peripheral speed suitable for the elongation. An object of the present invention is to provide a multi-stage wire drawing machine and a multi-stage wire drawing method that do not cause the above-mentioned problems and do not need to increase the drum diameter more than necessary.

[0007]

In order to achieve the above object, a multi-stage wire drawing machine of the present invention comprises winding a wire rod around a work drum formed of a stepped drum and an idle drum formed of a stepped drum to form the work. In a multi-stage wire drawing machine for performing stepwise wire drawing by a plurality of dies provided between a drum and the stepper drum, a plurality of steps in which the work drum and the idle drum are arranged on the same axis respectively. It is characterized in that it is divided into car drums, and the peripheral speed of each stage car drum in the work drum and the idle drum is controlled to a value calculated from the relationship between the drum rotation speed and the drum diameter.

Further, the multi-stage wire drawing method of the present invention comprises:
A multi-stage drawing in which a work drum composed of a stepping drum and an idle drum composed of a stepping drum are wound around, and wire drawing is performed stepwise by a plurality of dies provided between the work drum and the stepping drum. In the linear method, the work drum and the idle drum are each divided into a plurality of stepper drums arranged on the same axis, and the peripheral speed of each of the stepper drums in the work drum and the idle drum is defined as the drum rotation speed. It is characterized in that it is controlled by a value calculated from the relationship with the drum diameter.

[0009]

In the work drum and the idle drum, each of the stepped drums is divided into a plurality of parts, which are rotated at different rotational speeds, and the adjoining stepped drums are set to have a diameter for positioning the wire elongation. Combined with
In the multi-stage wire drawing machine, the problem that a thick wire rod has the smallest drum diameter can be solved, and even at the final stage, the diameter can be made smaller and smaller than the conventional one.

The slip between the drum and the wire in the multi-stage wire drawing machine will be described. As shown in FIG. 3, the stepper drum 1,
In each of the first to n-th step portions in 2, the diameter is D1, ... Dn, D1 is the diameter of the first step portion of the step wheel drum 1, and Dn in the step wheel drums 1 and 2 is the n step step portion. Is the diameter of. The peripheral speeds are V1, ..., Vn, V1 is the peripheral speed of the first stage of the stepped drum 1, and Vn is the peripheral speed of the nth stage drum. The diameter of the wire W at each of the first to n-th step portions of the stepper drums 1 and 2 is d1, ... dn
Where d1 is the diameter of the wire rod when passing through one step portion of the stepper drums 1 and 2, and dn is the diameter of the wire rod when passing through the n step portion. FIG. 3 is a diagram schematically showing each part of the first to nth stages of the stepper drums 1, 2.

Here, the wire passing amount per unit time is equal in the first stage and the n-th stage, and (V1 · π) / (4 · d1 ² ) =
An expression of (Vn · π) / (4 · dn ² ) is established. If there is no slip between the drum and the wire, V1 = 2π · N · (D1 / 2), where N is the number of rotations of the drum.
The equation of Vn = 2.pi.N. (Dn / 2) holds.

Therefore, from these two equations, V1 = Vn.multidot.
The formula (dn / d1) ² = Vn. (D1 / Dn) is derived. That is, the drum diameters D1, ..., Dn are determined from the wire rod diameters d1, ..., dn and are inversely proportional to the square of the wire rod diameter ratio. Therefore, the area reduction ratio for the wire rod and the number of stages of the drum increase, and the larger the wire rod diameter ratio, the larger the drum diameter ratio (ratio of the step wheels).

Further, on the other hand, the diameter of the drum at the front stage cannot be made too small due to the limit of the bending radius of the wire rod, and it cannot be made large at the rear stage due to the restriction on the size of the equipment. For this reason, the drum diameter is not determined based on the ratio of the wire diameters, and the step gear ratio of the drum is often made smaller than this. Therefore,
Slip will occur between the drum and the wire. Normally, the final stage drum that is wound up has zero slip, and the amount of slip increases toward the front stage.

Calculation of the amount of slippage occurring between the drum and the wire will be described. Dn diameter of nth stage
′, Where (Dn ′ <Dn), the peripheral speed of the first stage drum at this time is V1 ′ = V1 ′ = Vn. (D1 / Dn
´) As a result, the amount of slippage between the drum and the wire is V1'-V1 = Vn.D1. (1 / Dn'-1 /
Dn). The diagram of FIG. 4 and the diagram of FIG. 5 are for explaining the calculation of the amount of slip that occurs between the drum and the wire.

The drum is divided from the integral type into a plurality of blocks, and the drums of the plurality of blocks are rotated at a rotational speed of N1, ...
By individually rotating with Nn, as shown in FIG. 6, V1 = 2πN1 (D1 / 2) = πN1D1 and Vn = 2πNn (Dn / 2) = πNn・ Dn
fr. Therefore, V1 = Vn. (N1.D1 / Nn
-Dn) = Vn- (dn / d) ² .

Therefore, even if the wire diameter ratio is large, the drum diameters D1, ... Dn can be set arbitrarily by selecting the rotation speeds N1, ... The restrictions on the radius and the size of equipment can be eliminated.

That is, the occurrence of slippage between the drum and the wire rod is suppressed without increasing the size of the final stage of the drum, wire drawing is performed from a wire rod having a thicker diameter, and multistage wire drawing in which the number of stages is further increased. Can be implemented.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. The configuration of the multistage wire drawing machine of the present invention will be described with reference to FIGS. 1 and 2. In the figure, 11 is a work drum.
2 is an idle drum. The work drum 11 is, for example, a step wheel drum 13 having three step portions 13a to 13c,
It is composed of a stepper drum 14 having three steps 14a to 14c. That is, the step wheel drum 13 and the step wheel drum 14 constitute the work drum 11 having six step steps as a whole. Step portion 1 of step drum 13
3a to 13c have diameters D1, D2, and D3, and constitute 1 to 3 steps of the minimum diameter of the work drum 11, and the steps 14a to 14c of the stepping drum 14 have a diameter D.
It has 4, D5 and D6 and constitutes 4 to 6 steps of the work drum 11.

The idle drum 12 is, for example, a step portion 1 having three steps.
A stepped drum 15 having 5a to 15c and a stepped portion 1 of three steps
It is composed of a stepper drum 16 having 6a to 16c. That is, these stepped drum 15 and stepped drum 16
Constitutes an idle drum 12 having 6 stages as a whole.

The step portions 15a to 15c of the step-drum 15 have diameters D11, D12, and D13, and constitute the minimum diameter of the idle drum 11 from the first step to the third step. The step portions 16a to 16c have diameters D14, D15, D16, and constitute the four to six step portions of the idle drum 12.

The step wheel drum 14 of the work drum 11 is attached to a rotating shaft 17 supported by a bearing 18, and the step wheel drum 13 is supported by a bearing (not shown) provided on the rotating shaft 17. The stage wheel drum 16 of the idle drum 12 is attached to the rotating shaft 20 supported by the bearing 21, and the stage wheel drum 15 is supported by the bearing 22 provided on the rotating shaft 20.

The stepper drum 14 of the work drum 11 and the stepper drum 16 of the idle drum 12 are driven by the drive motor 23 and are wound around the belt wheel 24 attached to the output shaft of the drive motor 23. Belt 25 hung on belt 25 and attached to rotating shaft 17
6. The belt wheels 27 attached to the rotary shaft 20 are rotated at the same rotational speed.

The stepper drum 13 of the work drum 11 and the stepper drum 15 of the idle drum 12 are driven by the drive motor 23 and are wound around the belt wheel 28 attached to the output shaft of the drive motor 23. The belt 29 is wound around the belt wheel 30, the belt wheel 30 is attached to the stepper drum 14, and the belt wheel 31 is attached to the stepper drum 15.

Reference numeral 32 denotes a lubricating liquid supply device, which is provided between the work drum 11 and the idle drum 12, and each step portion of the step wheel drum 13 and the step wheel drum 14 of the work drum 11 (step wheel drum 15 of the idle drum 12). And car drum 1
6). The lubrication liquid supply device 32 has, for example, a slit in the wire rod passage portion, an elongated box-shaped container arranged parallel to the rotation axis of each drum, a tray for collecting the lubrication liquid, and a lubrication for circulating the lubrication liquid. It is composed of a pump.

Reference numeral 33 is a heating furnace, which is the work drum 11.
Between the work drum 11 and the idle drum 12
It is commonly provided in each step portion of the stepped drum 13 and the stepped drum 14 (each stepped portion of the stepped drum 15 and the stepped drum 16 of the idle drum 12). The heating furnace 33 is composed of, for example, a linear burner that is arranged parallel to the rotation axis of each drum and performs heating by gas combustion.

Reference numerals 34a to 34f designate six dies, which are between the work drum 11 and the idle drum 12 and each of the stage wheel drums 1 of the stage wheel drum 13 of the work drum 11.
4 stages of 6 stages (stage wheel drum 1 of idle drum 12)
5 and each step portion of the stepping drum 16).

Then, the work motor 11 and the idle drum 12 are rotated by the drive motor 23. The wire W is the first step portion 13a of the stepping drum 13 of the work drum 11.
The lubricating liquid is applied from the above through the lubricating liquid supply device 32, then passes through the heating furnace 33 and is heated, then passes through the die 34a and is wound around the first step portion 15a of the step drum 15 of the idle drum 12. Can be hung. Further, the wire W is directly moved and wound around the second step 13b of the stepping drum 13 of the work drum 11, and subsequently, the lubricating liquid supply device 32,
The idle drum 12 is passed through the heating furnace 33 and the die 34b.
It is wound around the second step portion 15b of the step drive drum 15. In this manner, the wire W is formed by the three step portions 13a to 13c of the step wheel drum 13 of the work drum 11 and the three step portions 15a to 15c of the step wheel drum 15 of the idle drum 12.
And passes through the three-stage dies 34a to 34c to perform wire drawing.

Next, the wire W passes through the first step portion 14a of the step drum 14 of the work drum 11, passes through the lubricating liquid supply device 32, the heating furnace 33, and the die 34d, and passes through the step drum of the idle drum 12. It is wound around the first step 16a of the 16th step. Further, the wire W is directly moved to and wound around the second step portion 14b of the stepper drum 14 of the work drum 11, and subsequently passes through the lubricating liquid supply device 32, the heating furnace 33, and the die 34e. It is wound around the second step portion 16b of the step drum 16 of the idle drum 12. In this way, the wire W is formed by the three step portions 15a to 15c of the step wheel drum 15 of the work drum 11 and the three step portions 16a to 16c of the step wheel drum 16 of the idle drum 12.
And passes through the three-stage dies 34d to 34f to draw a wire.

By carrying out the wire drawing in this way, it is possible to perform a multi-stage wire drawing process from a thicker wire diameter, and to generate a slip tension with the wire material at a drum peripheral speed suitable for the elongation rate, and There is no need to make the diameter larger than necessary. That is, it is possible to suppress the occurrence of slippage between the drum and the wire W without enlarging the final stage of the drum, perform wire drawing from a wire having a larger diameter, and perform multi-stage wire drawing by increasing the number of steps. Can be implemented.

FIG. 8 illustrates the case where no slip occurs theoretically between the drum and the wire. Figure 8
The upper row shows the drum 1 set to, for example, 6 steps,
An example of the diameters D1 to D6 (unit: mm) of each step is shown. The diameters (wire diameter unit: mm) d1 to d6 of the wire rods at each step of the drum are 1.0 mm-0.93 mm-0.
It is 87 mm-0.76 mm-0.70 mm-0.66 mm.

The middle part of FIG. 8 shows the relationship between the drum peripheral speed at each step of the drum and the wire drawing speed corresponding to the elongation of the wire. Here, the peripheral speed of the drum and the wire drawing speed corresponding to the elongation of the wire material match, and no slippage occurs between the drum and the wire material. The lower part of FIG. 8 shows the number of rotations of the drum in each part of the drum. The rotation speed is the same for each step.

FIG. 9 illustrates the case where slippage occurs between the drum and the wire. The upper stage of FIG. 9 shows the drum 1 set to, for example, 6 stages, and the diameters D1 to D6 (unit: mm) of each stage are the same as those in the example of FIG. Also, the diameters (wire diameter unit mm) d1 to d6 of the wire rods at the respective steps of the drum are the same as in the example of FIG.

The middle part of FIG. 8 shows the relationship between the drum peripheral speed at each step of the drum and the wire drawing speed corresponding to the elongation of the wire. Here, the drum peripheral speed and the wire drawing speed corresponding to the elongation of the wire do not match, and slippage occurs between the drum and the wire. The lower part of FIG. 9 shows the number of rotations of the drum in each part of the drum. The rotation speed is the same for each step.

FIG. 7 illustrates an example of a work drum composed of a stepping drum to which the present invention is applied. The upper part of FIG. 7 shows, for example, a work drum 11 configured by combining a three-step set car drum and a three-step set car drum, and the diameter D1 to D3 of each step part of the step car drum and the steps. The diameters D4 to D6 of the steps of the car drum are set to the same size. The diameters (wire diameter unit mm) d1 to d6 of the wire rods at the respective steps of the drum are the same as those in the example of FIG.

The middle part of FIG. 7 shows the relationship between the drum peripheral speed at each step of the drum and the wire drawing speed corresponding to the elongation of the wire. Here, the peripheral speed of the drum and the wire drawing speed corresponding to the elongation of the wire material match, and no slippage occurs between the drum and the wire material. The lower part of FIG. 7 shows the number of rotations of the drum in each step part of the stepper drum. The rotation speed of the stepping drum is set to be higher than the rotation speed of the stepping drum. It should be noted that the present invention is not limited to the above-described embodiments, and can be implemented with various modifications.

[0036]

As described above, according to the multistage wire drawing machine and the multistage wire drawing method of the present invention, it is possible to perform multistage wire drawing from a thicker wire diameter and at a drum peripheral speed suitable for the elongation. The slip tension between the wire and the drum is not generated, and it is possible to avoid making the diameter of the drum larger than necessary. That is, the occurrence of slippage between the drum and the wire rod is suppressed without increasing the size of the final stage of the drum, wire drawing is performed from a wire rod having a larger diameter, and multi-stage wire drawing is performed by increasing the number of stages. Can be implemented.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the configuration of a multistage wire drawing machine of the present invention.

FIG. 2 is a side view showing an embodiment of the configuration of the multistage wire drawing machine of the present invention.

FIG. 3 is a diagram showing a principle configuration of a multistage wire drawing machine of the present invention.

FIG. 4 is a diagram showing the principle of a multistage wire drawing machine and a multistage wire drawing method according to the present invention.

FIG. 5 is a diagram showing the principle of a multistage wire drawing machine and a multistage wire drawing method according to the present invention.

FIG. 6 is a diagram showing the principle of a multistage wire drawing machine and a multistage wire drawing method according to the present invention.

FIG. 7 is a diagram illustrating an example of a stepping drum of a multi-stage wire drawing machine of the present invention.

FIG. 8 is a diagram illustrating an example of a stepped drum having no slip.

FIG. 9 is a diagram illustrating an example of a stepped drum having slippage.

[Explanation of symbols]

11 ... Work drum, 12 ... Idle drum, 13 ... Step car drum, 14 ... Step car drum, 15 ... Step car drum, 16 ... Step car drum, 32 ... Lubricating oil supply device 33 ... Heating furnace, 34a-34f ... Dice .

Claims (2)

[Claims] 1. A wire rod is wound around a work drum made of a stepping drum and an idle drum made of a stepping drum, and is stepped by a plurality of dies provided between the work drum and the stepping drum. In a multi-stage wire drawing machine that performs wire drawing selectively, the work drum and the idle drum are divided into a plurality of sheave drums arranged on the same axis, and the work drum and each sheave drum of the idle drum are divided. A multistage wire drawing machine characterized in that the peripheral speed is controlled to a value calculated from the relationship between the drum rotation speed and the drum diameter. 2. A wire rod is wound around a work drum consisting of a stepping drum and an idle drum consisting of a stepping drum, and is stepped by a plurality of dies provided between the work drum and the stepping drum. In the multi-stage wire drawing method of performing wire drawing, the work drum and the idle drum are divided into a plurality of sheave drums arranged on the same axis, and the work drum and the respective sheave drums of the idle drum are divided. A multi-stage wire drawing method characterized in that the peripheral speed is controlled by a value calculated from the relationship between the drum rotation speed and the drum diameter.