JP2002113514A - Wire drawing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire drawing apparatus capable of reducing the time and labor required for a die change work and improving a wire drawing work efficiency. SOLUTION: In the wire drawing apparatus which immerses a wire drawing part having a die into an oil bath, an accommodation part 13 to insert/take out the die from above is formed to a die case 11 and a hydraulic cylinder 22 for die clamping to press/fix the die 12 is arranged to the die case 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire drawing apparatus for drawing a wire through a die, and more particularly to a wire drawing apparatus capable of easily changing a die from a die case.

[0002]

2. Description of the Related Art A conventional wire drawing apparatus will be described with reference to FIGS.

FIG. 2 is a plan view of a wire drawing apparatus, FIG. 3 is a front view of FIG. 2, and FIG. 4 is a sectional view taken along line AA of FIG.

As shown in FIGS. 2 and 3, the wire drawing apparatus has a structure in which a wire drawing portion 41 is immersed in an oil tank 40 filled with wire drawing lubricating oil.

[0005] As shown in FIG. 4, the wire drawing portion 41 is provided with a housing portion 44 for housing the dice 43 in the axial direction of the die case 42.
Is formed. The die 43 is inserted from the rear of the housing portion 44 and engaged with the spigot portion 44 a of the housing portion 44, the die holder 45 is inserted from the rear, and the die holder 45 is fixed by screwing the nut 47.

The die holder 45 includes a die holder flange 45a, a die holder slit 45b, and a die holder body 45c.

[0007] The spigot part 44a and the die holder 45
Are provided with packings 48 and 49, respectively. A cooling water flow path 50 is formed on the outer periphery of the die 43, and a cooling water supply port 51 is formed above the die case 42.

The nut 47 is provided with a guide pipe 54 for guiding the wire to the die 43, and an outlet 56 for the wire is formed in front of the die case 42.

On the outer periphery of the die holder 45, a housing portion 44 is provided.
And a packing 52 for sealing the cooling water flow path 50, and a guide pipe 54
An oil groove 53 for discharging the wire drawing lubricating oil flowing into the die 43 through the die holding slit 45b is formed.

The wire rod passes through a guide pulley 55 attached to the oil tank 40 shown in FIGS. 2 and 3, and enters the oil tank through an inlet (not shown) attached to the side surface of the oil tank 40.
From 4, it is guided to a die 43 housed in a wire drawing section 41, drawn by the die 43, and wound up by a hook of a wire drawing machine (not shown).

The wire is drawn to a predetermined size by repeating this drawing several times.

That is, in the wire drawing machine, a plurality of combinations of a wire drawing portion 41 provided with a die 43 as shown in FIGS. The wire is given a predetermined reduction and drawn.

As described above, the die 43 is provided with the die case 4
The nut 47 is screwed into the die case 42 via the die holder 45, and is fixed inside the die case 42 by the thrust generated at the screw portion. Is drawn in a high-viscosity drawing lubricating oil.

[0014]

In order to replace the die 43, first, the wire drawing part 41 is connected to the oil tank 40.
Take it out from the inside, then remove the nut 4
After removing the die 7 and the die holder 45, the die 43 is pulled out from the storage portion 44 and a new die 43 is inserted. Thereafter, the above-described procedure is reversed, and the wire drawing portion 41 is again formed.
In the oil tank 40.

As described above, one wire drawing machine has a plurality of wire drawing portions 41 provided with such dies 43, and the die changing work requires a lot of time and labor.

Accordingly, an object of the present invention is to provide a wire drawing apparatus which solves the above-mentioned problems, reduces the time and labor required for the die replacement work, and can streamline the wire drawing work.

[0017]

In order to achieve the above object, according to the first aspect of the present invention, a die is inserted into a die case from above in a wire drawing apparatus in which a wire drawing part having a die is immersed in an oil tank. This is a wire drawing machine in which a storage part for taking out and taking out is formed, and a dice case is provided with a hydraulic cylinder for die clamping for pressing and fixing the dice.

The invention according to claim 2 is the wire drawing apparatus according to claim 1, wherein the hydraulic cylinder for die clamping comprises a hollow hydraulic cylinder having a hollow hole through which a wire can pass.

According to a third aspect of the present invention, a die take-out opening for taking out the dice in the accommodating portion is formed at an upper portion of the die case, and a die holder for pressing the dice is provided at a rod portion of the hydraulic cylinder for die clamping. The wire drawing device according to claim 1 or 2, which is connected.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIGS. 1 (a) and 1 (b) show details of the wire drawing portion 10 immersed in the oil tank 40 described with reference to FIGS. 2 and 3. FIG. 1 (b) FIG. 2 shows a cross-sectional view taken along line AA of FIG.

In the die case 11 of the wire drawing part 10, a housing part 13 for housing the die 12 is formed from above through a cooling channel 20 described later.

The accommodating portion 13 is provided with a die outlet 14 at an upper portion so that the die 12 can be inserted and removed from the upper portion through the cooling channel 20, and an opening / closing lid 15 is provided at the die outlet 14 and Is fixed to the die case 11 by a packing 35 and bolts 16. The accommodating portion 13 is opened on the front side of the die case 11, and a die holder 18 is formed from the opening 17 by the die 1.
2 is inserted so as to abut.

The lower part of the die 12 is seated on the bottom wall 13 a of the housing 13, and the rear surface thereof is formed on the wall 13 b of the housing 13.
, And is sealed by a packing 19a provided on a wall surface 13b thereof, and a front surface thereof is sealed by a packing 19b provided on a die holder 18. Further, a packing 19c is provided on an outer periphery of the die holder 18 and provided on an outer periphery of the die 12. As shown in FIG. 1B, a cooling channel 20 is formed. A die cooling water supply port 21 is formed in the opening / closing lid 15.

An opening 17 is provided on the front surface of the die case 11.
A die clamp hydraulic cylinder 22 is provided to press the dice holder 18 through the through hole to fix the die 12 in close contact with the wall surface 13b.

The die holder 18 is a die holder flange 1
8a, a die holding slit portion 18b and a die holding body 18c, the rear end surface of which is in contact with the die 12, the front end thereof is connected to the die clamping hydraulic cylinder 22, and the intermediate portion through which the lubricating oil for wire drawing passes. A slit 18b is formed.

The hydraulic cylinder 22 for die clamping is formed of a hollow hydraulic cylinder.
1 comprises a hollow cylinder 24 attached via a plate 23, and a hollow piston 25 slidably provided in the hollow cylinder 24 and pressing the die holder 18. The hollow cylinder 24 and the hollow piston 25 are formed in the hollow cylinder 24 and the hollow piston 25. A guide pipe 28 for guiding the wire 27 to the die 12 is inserted through the hollow hole 26.

The hollow cylinder 24 has a hydraulic supply port 29A,
29B, and a cylinder outer cylinder 30 and a guide pipe 2 fitted in the cylinder outer cylinder 30.
8 and a hollow inner cylinder 31 having a guide portion 31a for guiding the hollow piston 25 at the distal end.

The hollow piston 24 has a piston portion 24a fitted to the cylinder outer cylinder 30, and has a guide portion 31 on its inner periphery.
and a rod portion 24c extending from the cylinder outer cylinder 30 to the die holder 18 through the opening 17 of the die case 11 at the distal end.

A nut 33 for fixing the die holder 18 is screwed into the tip of the rod portion 24c. The front end of the die holder 18 is inserted into the inner periphery of the nut 33, and the nut 33 is fixed by a pin 34. Fixed to

An oil groove 36 is formed in the die case 11 through the guide pipe 28 through the die holding slit 18b to discharge the lubricating oil for drawing, as indicated by the arrow in the drawing. An outlet 37 of the wire 27 drawn at 12 is formed.

Next, the operation of the present invention will be described.

First, at the time of wire drawing, the hydraulic supply port 29A
From the hydraulic cylinder 22 for the die clamp.
The hollow piston 25 is moved rightward as viewed in the figure, and the die 12 is pressed and fixed via the die holder 18. In this state, the wire 27 is moved from the guide pipe 28 to the die 1.
Wire drawing is performed through 2.

Next, when the die 12 is replaced, pressure oil is supplied to the hydraulic supply port 29B, and the hollow piston 25 is moved to the left as viewed in the drawing. By moving the hollow piston 25 in this manner, the die 12 is released from close contact with the wall surface 13b of the die case 11, and in this state, the opening / closing lid 15 is removed, and the die 12 is taken out of the housing portion 13 and the opening 14 is removed. Can be taken out via

Further, a new die 12 is provided in the outlet 1
By inserting the opening / closing lid 15 from the housing 4 and closing the opening / closing lid 15 and supplying hydraulic oil from the hydraulic supply port 29 </ b> A, it can be fixed in the die case 11.

The operation of the die-clamping hydraulic cylinder 22 can be performed by simply switching a switch on an operation panel of a hydraulic device (not shown) to set a clamped state or cancel the clamped state.

As described above, the die 12 is connected to the die case 1
By taking out the dice case 11 which is heavy and contaminated with wire drawing lubricating oil from the oil tank by taking out from the upper outlet 14 above, the dice 12 can be easily replaced without contaminating the periphery with the wire drawing lubricating oil. can do.

When the die is replaced, the oil bath is filled with lubricating oil, and when the dice is replaced, the lubricating oil remaining in the guide pipe 28 is removed from the housing 13 and the cooling passage 2.
0, but when the wire drawing machine is stopped, the temperature of the wire drawing lubricating oil is low and it is on the extremely viscous syrup, so that the wire drawing lubricating oil itself does not have much fluidity, and If the inlet side of the guide pipe 28 is closed, the amount of wire drawing lubricating oil in the guide pipe 28 is small, and if the inside of the housing 13 and the cooling flow path 20 is wiped off when a new die is set, the lubricating oil flows in. No problem.

After the die is replaced, when the clamped state is reached, the end of the wire is processed to be smaller than the die hole diameter, and the wire is inserted from the guide pipe 28 side to complete the replacement operation.

[0040]

In summary, according to the present invention, the workability for exchanging dies is remarkably improved, and efficient production becomes possible.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a plan view of the wire drawing device.

FIG. 3 is a front view of FIG. 2;

FIG. 4 is a sectional view taken along line AA of FIG. 2 showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Dice case 12 Dice 13 Housing 22 Hydraulic cylinder for die clamp

[Procedure amendment]

[Submission date] October 19, 2000 (2000.10.
19)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Fig. 1

[Correction method] Change

[Correction contents]

FIG.

Claims (3)

[Claims] In a wire drawing apparatus in which a wire drawing part having a die is immersed in an oil tank, an accommodation part for inserting and removing a die from above in a die case is formed, and in the die case,
A wire drawing device provided with a die clamping hydraulic cylinder for pressing and fixing a die. 2. The wire drawing apparatus according to claim 1, wherein the hydraulic cylinder for die clamping is a hollow hydraulic cylinder having a hollow hole through which the wire can pass. 3. A die take-out opening for taking out a dice in the accommodating portion is formed at an upper portion of the die case, and a die holder for pressing the dice is connected to a rod portion of the hydraulic cylinder for die clamping. 3. The wire drawing device according to 1 or 2.