KR100393895B1 - A rolling work hardening apparatus for wire rod - Google Patents

Abstract

The present invention relates to a wire hardening apparatus for a wire rod, and an object thereof is to roll the surface of the wire rod to improve surface roughness and hardness and to simultaneously harden the wire rod.

According to the rolling curing device for wire rod according to the present invention for this purpose; The wire rod A entered between the first roll dice 50 and the second roll dice 70 rotating in the same direction in a state in which they are disposed to be displaced with each other rotates while rubbing against them so that the surface thereof is smoothly processed. Accordingly, as the surface of the wire rod A is rolled, it does not cause environmental pollution, the hardness and surface gloss of the wire rod A is improved, and the straightness and precision of the wire rod A are also increased. . In addition, the wire rod A is processed and hardened by friction with the surfaces of the first roll die 50 and the second roll die 70, and automatically transferred to the rear, thereby continuously rolling and hardening the wire rod A. Due to this, there is an effect that can significantly increase the work productivity.

Description

Rolling Hardening Equipment for Wire Rods {A ROLLING WORK HARDENING APPARATUS FOR WIRE ROD}

The present invention relates to a wire hardening apparatus for wire rods, and more particularly, to a wire hardening apparatus for wire rods which is capable of improving the hardness and roughness of the wire rod by continuous surface processing.

In general, a wire rod refers to a thin and long ring of steel, and is manufactured through a series of processes such as drawing and extrusion. The wire rod manufactured through this process generates a lot of scales and scratches on the surface, and a surface treatment process of the wire rod is required to remove them.

Therefore, the conventional electrolytic polishing method of immersing the wire rod in a polishing liquid made of acetic acid-perchloric acid or the like is applied as a surface treatment method of the wire rod. In other words, electropolishing is performed by electrolyzing the wire as an anode, as opposed to electroplating, so that a polished polished surface can be obtained.

However, in the conventional method of surface treatment of wire rods, the surface gloss of wire rods is insufficient after polishing, and there is a problem in that environmental pollution caused by polishing liquids made of chemicals is generated, thereby increasing wastewater treatment costs. In addition, since only the gloss treatment is performed on the surface of the wire rod, it does not affect the hardness of the wire rod. Therefore, a separate curing process is required again.

The present invention is to solve this problem; SUMMARY OF THE INVENTION An object of the present invention is to provide a rolling curing apparatus for wire rods by rolling the surface of the wire rod to improve surface gloss and increase its hardness.

In addition, another object of the present invention is to provide a rolling curing apparatus for wire rods that can be continuously cured by applying a feed force while rolling the surface of the wire rod.

1 is a front view of a rolling curing device for wire rod according to the present invention.

Figure 2 is a plan view schematically showing the upper structure of the rolling curing device for wire rod according to the present invention.

FIG. 3 is a plan view schematically illustrating an arrangement structure of first and second roll dies viewed in the direction of arrow III of FIG. 1.

FIG. 4 is a side view illustrating an arrangement structure of first and second roll dies as viewed in the arrow IV direction of FIG. 3.

5 is a conceptual view showing a state in which a feed force is generated by the first and second roll die rotation according to the present invention.

6 is a half sectional view showing another embodiment of the first and second roll dice according to the present invention.

* Description of the symbols for the main parts of the drawings *

10.frame 20.fixture

30..Songdae 40..1 Headstock

50. 1st Roll Dice 60. 2nd Headstock

70. 2nd Roll Dice 90.

A..Wire Rod

The present invention for achieving this object is;

In the rolling curing apparatus for wire rods for processing the surface of the wire rod;

The rolling curing apparatus includes: a first headstock disposed on an upper part of the frame and rotating by the driving means, the first headstock being inclined backward by a predetermined angle with respect to the vertical surface; A first roll die which is rotatably coupled to the first spindle and the circumferential surface is smooth; A second spindle installed in parallel with the first spindle and having a predetermined angle inclined forward with respect to the vertical plane; A second roll die which is rotatably coupled to the second headstock and moves backward while rolling the surface of the wire rod which is rotated in the same direction while maintaining a predetermined gap with the first roll die; And a support blade disposed below the first roll die and the second roll die so as to support and support the wire rod entered between the first and second roll dice.

In addition, the inclination of the first spindle and the second spindle is characterized in that 1 ~ 10 °.

In addition, the outer periphery of the distal end portion of the first rolling die and the second rolling die is characterized in that the crowning process to facilitate the initial entry of the wire rod.

In addition, an oil supply line for supplying oil to these surfaces is arranged above the first and second rolling dice.

In addition, the first and second rolling dies are coated with a diamond coating, titanium coating, vanadium coating or cemented carbide for surface hardening.

In addition, the outer periphery of the first and second rolling dice is characterized in that the cylindrical reinforcement cover made of cemented carbide for surface hardening is pressed.

Hereinafter, one preferred embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

Rolling curing device for wire rod according to the present invention by rolling the surface of the wire to polish and at the same time harden, as shown in Figures 1 and 2, can be rotated on the left side from the upper center of the frame 10 as a starting point The first headstock 40 (headstock), the second headstock 60 rotatably installed on the right side from the top center of the frame 10, and the first and second headstock 40 ( Each of the first and second roll dice 50 and 70 installed in the 60 and a plurality of control buttons 80 are provided to control each component.

The frame 10 forms an outer body of the rolling curing apparatus, and a hydraulic tank (not shown) and an oil tank (not shown) are disposed therein. An upper portion of the frame 10 is provided with oil supply lines 11 and 12 for supplying oil to the surfaces of the first and second roll dice 50 and 70 in association with the oil tank. The oil supplied to the surface of the first and second roll dice 50 and 70 reduces the friction between the first and second roll dice 50 and 70 and the wire rod A, and the first and second rolls. It performs a function of maintaining the precision of the die 50, 70 and the surface of the wire (A). The oil passing between the first and second roll dice 50 and 70 is preferably configured to return to the oil tank to remove bubbles.

In addition, the fixing stand 20 is installed on the upper left side of the frame 10, where the first spindle 40 is mounted to rotate in a state inclined backward by a predetermined angle with respect to the vertical plane (Figs. 3 and 4). Reference). Therefore, the first headstock 40 can be rotated in an inclined state, but its position is fixed. The first headstock 40 is rotated by receiving the power generated from the driving means, that is, the hydraulic motor not shown through the gears 41 and 42. At this time, the hydraulic motor which is an embodiment of the driving means is used in consideration of the load received by the first headstock 40, an electric motor may be used without limitation.

The first roll die 50 is rotatably coupled to the first spindle 40, the circumferential surface thereof is made smooth. Accordingly, when the first roll die 50 rotates together with the first headstock 40, the surface of the wire rod A is rolled.

And the conveyance table 30 is installed on the upper right side of the frame 10 (see Figs. 1 and 2), where the second headstock 60 is rotatably in parallel with the first headstock 40 Is mounted. A hydraulic cylinder 31 is disposed on the transfer table 30 so as to transfer the second spindle 60 in a horizontal direction, and the hydraulic cylinder 31 has a spindle distance adjusting screw extending out of the frame 10. 32).

The second headstock 60 is also rotated in the same direction by receiving power through the gears in the same way as the first headstock 40. At this time, the second headstock 60 is inclined at a predetermined angle in a direction opposite to the first headstock 40. That is, the second headstock 60 is mounted to rotate in a state inclined forward by a predetermined angle relative to the vertical plane, whereby the second headstock 60 rotates in an inclined state and at the same time the position thereof is also changed. Can be.

In addition, the second roll dice 70 is also rotatably coupled to the second headstock 60, as shown in Figures 3 and 4, its circumferential surface is also made smooth. Accordingly, the second roll dice 70 rotates in the same direction while maintaining a predetermined gap with the first roll dice 50, thereby rolling the surface of the wire rod A entering between them.

As described above, the first spindle 40 is inclined backward by a predetermined angle relative to the vertical plane, whereas the second spindle 60 is inclined forward by a predetermined angle relative to the vertical plane. As the surface is rolled, a feed force is applied to the wire rod A (see arrow directions in FIGS. 3 and 4). To this end, the inclination of the first headstock 40 and the second headstock 60 is appropriately set according to the material and the feeding speed of the wire rod A. As the inclination increases, the feeding speed becomes faster. In fact, as shown in FIG. 5, the inclination θ of the first roll dice 50 installed on the first spindle 40 is preferably set in a range of 1 to 10 ° in consideration of a feed speed and the like. In the embodiment of the present invention, the angle is set to 3 degrees. (On the other hand, since the inclination of the second roll dice 70 is configured to deviate from the first roll dice 50, this is not shown.)

In addition, it is preferable to harden the first and second roll dies 50 and 70 so as not to damage the wear even after long-term work. That is, in order to prevent mechanical wear of the first and second roll dice 50 and 70, the surface thereof was hardened by titanium. That is, in the exemplary embodiment of the present invention, the surfaces of the first and second roll dice 50 and 70 are coated with titanium, but are not limited thereto, and diamond, vanadium, or other hard metals may be used. The same effect can be exhibited by coating with). In FIG. 3, reference numerals 52 and 72 designate a titanium coating layer for surface hardening on the first and second roll dice 50 and 70.

And the outer periphery of the distal end of the first and second roll dice 50, 70 into which the wire rod A enters is crowned 51, 71 (CROWNING) to facilitate the initial entry of the wire rod A ( 3). That is, the gap between them is slightly increased through processing of the crowning 51 and 71 having a predetermined curvature while slightly thinning the tip portions of the first and second roll dice 50 and 70, thereby processing The initial entry of the wire rod (A) is made easy.

On the other hand, in the lower portion between the first roll die 50 and the second roll die 70, that is, the upper center portion of the frame 10, the support blade 90 (Fig. 1) to support and support the wire rod A entered between them. 2) is installed. The upper height of the support blade 90 is preferably set to be slightly lower than the height of the first and second roll dice 50, 70 minus 1/2 of the diameter of the wire rod A to be processed. Due to the progress of hardening of the wire A, the first roll dice 50 and the second roll dice 70 are not separated. In fact, the top height of the support blade 90 is configured to be about 0.2mm lower than the height of the first and second roll dice 50, 70, minus half the diameter of the wire (A).

Next will be described the operation and the effects of the rolling curing device for a wire rod according to the present invention configured as described above.

First, the gap between the first roll die 50 and the second roll die 70 is set in consideration of the diameter of the wire A to be processed, and then the driving means is driven through the controller 80. Therefore, the first roll dice 50 and the second roll dice 70 rotate in the same direction while maintaining a constant gap.

In this state, when the wire rod A enters through the entrance portions treated with the crowning 51 and 71 of the first roll dice 50 and the second roll dice 70, the wire rod A is supported by the support blade 90. At the same time it is loaded in the upper portion and rotates in the same direction while rubbing against the first roll dice 50 and the second roll dice 70.

Therefore, the surface of the wire rod A is smoothly plasticized by the frictional pressure between the first roll die 50 and the second roll die 70, so that the surface gloss thereof is significantly improved. At the same time, the surface of the wire rod A is hardened so that the fatigue strength is also improved.

In addition, since the first roll die 50 and the second roll die 70 rotate in a state in which they are mutually inclined, the load F transmitted from these to the surface of the wire rod A is as shown in FIG. 5. Likewise, the feed force is applied to the processed wire rod A by separating the feed force f2 and the contact load f1. Accordingly, the wire A is automatically conveyed backward while being supported by the support blade 90 while the surface is continuously hardened, thereby improving its work productivity significantly.

On the other hand, in the embodiment of the present invention has been described as curing the elongated wire (A), it is not limited to this, it is also possible to cure the pipe through the rolling curing apparatus according to the present invention.

In addition, in the embodiment of the present invention, the first and second roll dies 50 and 70 have been described as the surface hardening treatment as an example, but not limited to this, as shown in FIG. 6, the first and second Even when the cylindrical reinforcement cover 53, 73 made of cemented carbide is pressed into the outer circumference of the roll die 50 and 70, mechanical wear thereof can be prevented. At this time, the outer periphery of the first and second roll dice 50, 70 is preferably configured to be stepped in a predetermined section for press-fitting the reinforcement cover 53, 73, the inlet of the reinforcement cover 53, 73 It is desirable to also process the crowning 54 and 74 on the minor outer circumference.

As described in detail above, according to the rolling curing device for wire rods according to the present invention, the wire rod entered between the first roll die and the second roll dice rotating in the same direction in a state in which they are arranged mutually displaced and rotates while rubbing against them. Its surface is smoothed. Accordingly, as the surface of the wire rod is rolled, it does not cause environmental pollution, and also has an effect of improving the hardness and surface gloss of the wire rod and at the same time increasing the straightness and precision of the wire rod. In addition, the wire rod is processed and hardened by friction with the surfaces of the first roll die and the second roll die, and automatically transferred to the rear, thereby continuously rolling and hardening the wire rod, thereby having an effect of significantly increasing work productivity. have.

Claims (6)

The first headstock 40 is rotatably coupled to the first headstock 40 and rotated by the driving means and inclined a predetermined angle to the rear with respect to the vertical plane, and is rotatably coupled to the first headstock 40. The first roll dice 50, the second headstock 60 is installed in parallel with a predetermined interval with the first headstock 40 and inclined forward by a predetermined angle relative to the vertical plane, and the second headstock The second roll die 70 is rotatably coupled to the 60, and is transported backward while rolling the surface of the wire rod A that is rotated in the same direction while maintaining a predetermined gap with the first roll die 50. In the rolling curing apparatus for wire rods having a wire) and processing the surface of the wire rod (A), The first and second roll dice (50, 70) is made of a smooth circumferential surface, A support blade 90 supporting and supporting the wire rod A entered between the first and second roll dice 50 and 70 at a lower portion between the first roll dice 50 and the second roll dice 70. ) Is placed, Rolling hardening for the wire rod, characterized in that the crowning 51, 71 is treated on the outer periphery of the tip portion of the first roll die 50 and the second roll die 70 to facilitate the initial entry of the wire (A) Device. delete delete The method of claim 1, Rolling hardening apparatus for wire rods, characterized in that the oil supply line (11) (12) for supplying oil to the surface of the first, the second roll die (50) (70) is disposed. delete The method of claim 1, Rolling hardening device for a wire rod, characterized in that the tubular reinforcement cover (53) (73) made of cemented carbide metal is pressed in the outer circumference of the first and second roll dice (50) (70).