KR200227087Y1 - Structure for keeping the lubricant from penetrating into the shaft bearing of cone in wet drawing machine - Google Patents

Abstract

The present invention provides a wet lubricant for the cone shaft bearing of a wet fresh machine to prevent the wet fresh lubricant from penetrating into the cone shaft bearing along the cone shaft by forming a storage and discharge passage of compressed air in the cone shaft bearing housing and the cone shaft of the wet fresh machine. It relates to a penetration prevention structure.

The structure of the present invention is a ring-shaped cylindrical clearance formed between the cone shaft bearing housing inner circumferential surface 26S and the cone shaft outer circumferential surface 22S opposed between the cone shaft bearing B and the cone shaft bearing housing one end 26E. Cone bearing between the air gap AG and the upper and lower air gaps AG1 and AG2 to allow the discharge of compressed air separated into the upper and lower air gaps AG2 and AG1 by the air pocket AP of the upper and lower air gaps AG1 and AG2. Grooves AP2 and AP1 provided on the housing inner circumferential surface 26S and the cone shaft outer circumferential surface 22S, respectively, are formed to face each other at intervals of the air gap AG so that compressed air is temporarily stored. An air supply pipe (AC) connected to the air pocket (AP2) on the inner circumferential surface side of the cone shaft bearing housing in a state inclined toward the cone shaft bearing side with respect to the cone axial direction and serving as a passage for supplying compressed air to the air pocket (AC); ) And the The thickness (t) of the air gap (AG) is entering the tilt angle (θ) of 10~50㎛, an air supply pipe (AC) has a technical feature in 30 ° ~60 ° Im.

The wet draft lubricant's intrusion prevention structure of the present invention uses compressed air, so there is no component to be damaged despite the high speed rotation of the cone shaft. Since only maintenance and maintenance are required, the productivity of the drawing machine is improved, and the maintenance and maintenance costs of the drawing machine are reduced.

Description

Structure for keeping the lubricant from penetrating into the shaft bearing of cone in wet drawing machine}

The present invention relates to a lubricant penetration preventing device for preventing wet lubricant from penetrating along a cone shaft in a cone shaft bearing of a wet drawing machine, and more specifically, to prevent external contaminants from penetrating into the bearing. Instead of the retainer, an air supply pipe having an appropriate inlet angle with respect to the air pocket and the two-way air gap and the cone axis is formed at the position of the retainer mounted on one side of the inside, and the compressed air is supplied through the air supply port. It relates to a wet lubricant penetration prevention structure for cone shaft bearings of a wet drawing machine that prevents the penetration of wet fresh lubricant into the cone shaft bearing by the compressed air discharged to the outside of the bearing by supplying a.

In general, the drawing work for reducing the wire rod of the circular cross section to the required diameter generates a lot of heat while maintaining the compression and friction conditions under severe conditions at the contact surface between the wire rod and the drawing die through-hole having a smaller diameter than the wire rod. Surface defects such as scratches due to deformation processing are generated on the surface of the relatively soft wire.

Therefore, the lubricant is supplied to the contact surface between the wire rod and the wire die to prevent the surface defect of the wire rod and to reduce the coefficient of friction due to the contact between the wire die and the wire rod to reduce the heat of deformation processing of the wire rod and to improve the freshness. The lubricant is different from the supply method of the lubricant according to the characteristics of the wire to be drawn, which is roughly divided into dry and wet wire according to the lubricant supply method, and the lubricant of the dry and wet wire has different characteristics.

Dry drawing is a state in which a lubricant is applied to a surface by dropping a lubricant on the surface of the wire rod at a point on the movement path of the wire rod which proceeds to the drawing die or by depositing the wire rod through the lubricant before the wire rod passes the fresh die. The lubricant applied to the wire surface by the wire is not recovered.

Wet drawing is a drawing method applied to fine wire drawing of less than 0.5mm of wire diameter, which can't apply appropriate amount of lubricant to wire surface by applying lubricant of dry drawing, and has a relatively high amount of friction heat generation. The wire work is performed in a state in which all of the wire rods are immersed in a lubricant which is an aqueous solution in which a wet lubricant is added to water at a constant concentration. Therefore, wet lubricants should have cooling and detergency in addition to lubricity in aqueous solution.

In general, wet wire drawing of wire rod is subjected to pretreatment process such as surface scale removal and heat treatment of wire rod, which is a material, and then coated on the surface with brass plating layer to improve rust prevention and drawing drawability. Stepwise drawing is carried out in a wet drawing machine to reach a predetermined diameter to obtain plated drawing.

At this time, the brass-plated wire is guided by the drawing capstan of the wet drawing machine installed in the drawer capstan and the drawing die of the multi-stage inside the chamber filled with the lubricant in the aqueous solution state, and the step diameter reduction in the process of passing the drawing die and Together, they go through a fresh process of increasing length.

Figure 1 schematically shows the structure of a conventional wet drawing machine, and when looking at the wet drawing process based on this, a pair of multi-stage discs into the drawing tank 11 filled with the lubricant (L) circulated and supplied from the centralized tank (14) A drawing capstan 12 consisting of a plurality of wires is installed, and a plurality of drawing dies 13 are installed on the moving path of the wire rod W which is guided and moved to the drawing capstan 12 which rotates at high speed, and the wire rod W is being moved. As the wire rod passes through the drawing die 13, a drawing operation is performed in which the wire rod is increased in length with a predetermined sequential cross-section reduction.

At this time, a problem in the wet drawing machine is a lubricant that penetrates into the bearing along the rotation axis of the drawing capstan (hereinafter referred to as a 'cone'), also called a cone, and the lubricant penetrating into the bearing damages the bearing so that It causes a lot of stoppage and poor wiring.

Therefore, the conventional cone shaft is equipped with a plurality of retainers in order to prevent the inflow of lubricant penetrating into the bearing along the cone axis, based on Figure 2 showing the structure of the cone shaft in detail as follows.

As shown, the cone 21 deposited in the lubricant L of the fresh tub is coupled to one end of the cone shaft 22, and the cone shaft 22 is in contact with the top of the cone 21, and the top of the fresh tub upper cover 24 is shown. 1) It is primarily supported by the retainer housing 23 fixed to the bottom surface, and two retainers R2 and R1 are mounted at upper and lower ends of the cone shaft 22 through hole of the retainer housing 23, thereby providing lubricant (L). It is a structure which prevents outflow to the outside of a drawing tank along the cone shaft 22.

In addition, when the lubricant L flows out of the drawing vessel along the cone shaft 22 due to damage of the two retainers R2 and R1, the leaked lubricant L penetrates into the cone shaft bearing B. In order to prevent this, another retainer R3 is mounted on the inner circumferential surface of the cone shaft through hole inlet 26E of the cone shaft bearing housing 26 fixedly coupled to the cone shaft fixing frame 25.

As described above, the conventional drawing machine is provided with a triple retainer to prevent the lubricant from penetrating into the cone shaft bearing along the cone shaft. However, the inner circumferential surface of the retainers is always in contact with the outer circumferential surface of the high speed rotating cone shaft. Because of this very short, in order to prevent damage to the cone shaft bearing, such retainers have to be checked and replaced from time to time, resulting in an increase in downtime resulting from maintenance and inspection.

In addition, although a mechanical seal, which is a sealing material superior to the retainer, may be used, the mechanical seal is not only expensive but also damaged by slight carelessness during assembly. There is a lot to follow.

The present invention solves the problems of the sealing structure for preventing the penetration of the wet drawing lubricant of the conventional drawing machine cone shaft bearing, and the lubricant penetrates along the outer circumferential surface of the cone shaft without any damage despite the high speed rotation of the cone shaft. It is an object of the present invention to provide a wet lubricant penetration preventing structure for a contactless cone shaft bearing that can prevent inflow.

1 is a schematic structural diagram of a wet drawing machine.

2 is a cross-sectional view of a cone assembly.

Figure 3 is a cross-sectional view of the cone assembly to which the subject innovation structure is applied.

4 is an enlarged cross-sectional view of the present invention structure.

5 is an exploded perspective view of the present invention structure.

((Explanation of symbols for main part of drawing))

11.Wet freshness 12. Withdrawal capstan

13. Fresh dice 14. Centralized tank

21. Cone 22. Cone Shaft

23. Retainer housing 24. Fresh-cage top cover

25. Cone Shaft Fixed Frame 26. Cone Shaft Bearing Housing

AP. Air Pocket AG. Air gap

AC. Air supply line

The above object of the present invention is an air gap and a cone shaft bearing formed in both up and down directions of a cone shaft about an air pocket and an air pocket provided on an inner circumferential surface of a cone shaft bearing housing and an opposite surface of a cone shaft at a retainer mounting position of a conventional cone shaft bearing housing. This is achieved by an air supply line connected to the air pocket on the outside of the housing.

The air pocket is provided at a position biased at one end of the cone shaft bearing housing between the cone shaft bearing in the cone shaft bearing housing and one end of the cone shaft bearing housing, and the inner circumferential surface of the opposite cone shaft bearing housing and the outer circumferential surface of the cone shaft. The two grooves each formed along the surface thereof face each other to form a ring shaped air pocket.

The air gap is formed between the one end of the ring-shaped air pocket and one end of the cone shaft bearing and the other end of the air pocket and the one end of the cone shaft bearing in an up and down direction with respect to the air pocket, respectively, to form a cylindrical shape. .

The air gap is a cylindrical fine gap formed between the inner circumferential surface of the cone shaft bearing housing between the cone direction one end of the cone shaft bearing housing and the cone shaft bearing one end, and the cone shaft outer circumferential surface opposite thereto, and the air pocket is cylindrical air. It is a shape formed larger than the thickness of the air gap along the inner and outer peripheral surfaces of the air gap at a position biased in one direction between both ends of the gap.

The wet drawing lubricant penetration preventing structure of the present invention is applied to a cone shaft bearing housing without being applied to a retainer housing coupled to a conventional drawing vessel upper cover, and the retainer housing is relatively easy to disassemble and repair. It is easy to replace the retainer, but in the case of cone shaft bearing housing, it is very difficult to disassemble it for replacing the retainer, which is a small part as a heavy material.

Details of the above technical configuration and specific characteristics of the wet lubricant penetration preventing structure for the cone shaft bearing of the present invention wet drawing machine will be clearly understood by the following description with reference to the accompanying drawings.

3 shows a schematic view of the present invention structure, FIG. 4 schematically shows an enlarged view of the present invention structure, and FIG. 5 shows a separation view of the present invention structure.

As shown, the structure of the present invention is an air gap that prevents the introduction of wet fresh lubricant penetrating along the cone shaft outer circumferential surface 22S by discharging the compressed air to the outside through one end of the cone shaft bearing housing 26 ( AG), an air pocket (AP) for temporary storage of compressed air discharged to the air gap, and an air supply pipe (AC) for supplying compressed air to the air pocket (AP).

The air gap AG constituting the structure of the present invention is between the inner circumferential surface (corresponding to the outer circumferential surface of the air gap) 26S of the cone shaft bearing housing and the cone axial outer circumferential surface (corresponding to the inner circumferential surface of the air gap) 22S opposite thereto. A cylindrical gap formed with a fine thickness (t) of 10 to 50 μm, and the grooves AP2 and AP1 provided on the outer circumferential surface 26S of the cylindrical air gap AG and the inner circumferential surface 22S opposite to each other. The air pocket AP is formed by adjoining adjacently.

At this time, when the thickness of the air gap AG is less than 10 μm, the gap is too small to control the amount of compressed air discharged through the one end 26E of the cone shaft bearing housing, and at the same time the inner surface of the air gap 22S ) And it is difficult to form an air film for preventing contact between the outer circumferential surface 26S, and when the thickness exceeds 50 µm, the consumption of the compressed air discharged is excessive.

The air pocket AP formed integrally with the cylindrical air gap AG has a distance d ₂ between the center of the air pocket AP and one end BE of the cone shaft bearing, and the center of the air pocket AP. And the distance d ₁ between the cone direction side end portion 26E of the cone shaft bearing housing are formed on the inner and outer circumferential surfaces 22S and 26S of the cylindrical air gap AG at a position satisfying the following expression. That is, the air gap AG is separated into two upper and lower portions AG1 and AG2 by the air pocket AP.

d ₂ d ₁

The air pocket AP is installed to satisfy Equation 1 in order to allow the compressed air supplied from the outside to be discharged more smoothly to the outside of the cone shaft bearing than to the cone shaft bearing side.

The air supply pipe AC is inclined toward the cone shaft bearing with respect to the cone axis 22 direction, and the inclination angle θ of the air supply pipe AG with respect to the cone axis 22 direction satisfies the following equation. shall.

As described above, the inclination of the air supply pipe AC to a certain range of angles with respect to the cone axis means that when the angle is smaller than 30 °, the time that the supplied compressed air stays in the air pocket AP is reduced and the cone axis is reduced. When the amount of air discharged to the outside of the bearing housing 26 is excessively increased and exceeds 60 °, the time for which the compressed air stays in the air pocket AP extends longer than necessary, which hinders the smooth supply of compressed air. As the amount of air discharged to the outside of the cone shaft bearing housing 26 is reduced, the ability to prevent penetration of the wet fresh lubricant is reduced.

The air pocket AP is formed not only on the outer circumferential surface 26S of the air gap AG, but also formed on the inner circumferential surface 22S, that is, the cone shaft outer circumferential surface. The air pocket AP and the air pocket AP and the cone are formed by forming a vortex that prevents the flow of compressed air within the air pocket AP, while preventing the rapid deflation of the cone shaft bearing housing along the outer circumferential surface 22S. This is to allow the compressed air to be discharged to the outside of the cone shaft bearing housing through the other air gap AG2 while the compressed air is filled in the air gap AG1 between the shaft bearing one end portions BE.

In addition, a rubber ring RS for preventing leakage of compression synchronous is mounted at the beginning of the air supply pipe AC on the outer circumferential surface OS of the cone shaft bearing housing.

As described above, the wet wire lubricant intrusion prevention structure of the present invention uses compressed air, so that the cone shaft rotates at high speed, so there is no component to be damaged. There is no need for regular maintenance and preservation of the freshener, which improves the productivity of the freshener and reduces the maintenance and maintenance costs of the freshener.

Claims (4)

Cylindrical clearance formed between the cone shaft bearing housing inner circumferential surface 26S and the cone shaft outer circumferential surface 22S between the cone shaft bearing B and the cone shaft bearing housing one end 26E and the ring-shaped air pocket AP. The air gap AG separated by the upper and lower air gaps AG1 and AG2, and the cone shaft bearing housing inner circumferential surface 26S between the upper and lower air gaps AG1 and AG2 and the cone shaft outer circumferential surface 22S opposite thereto. Air grooves (AP) formed in each of the grooves (AP2) (AP1) are provided to face each other at intervals of the air gap (AG) and the cone in a state inclined toward the cone shaft bearing side with respect to the cone axis direction A wet lubricant penetration preventing structure for a cone shaft bearing of a wet drawing machine, characterized by comprising an air supply pipe (AC) connected to an air pocket (AP2) on the inner circumferential surface side of the shaft bearing housing. The wet lubricant penetration preventing structure for a cone shaft bearing of a wet drawing machine according to claim 1, wherein the thickness t of the air gap AG is 10 to 50 µm. The wet lubricant penetration preventing structure for a cone shaft bearing of a wet drawing machine according to claim 1, wherein the inclination angle θ formed by the air supply pipe (AC) and the cone shaft satisfies the following equation. Equation The method of claim 1, wherein the air supply pipe (AC) is a rubber ring (RS) for preventing the leakage of compressed air is mounted on the initial portion of the air supply pipe (AC) that meets the cone shaft bearing housing outer peripheral surface (OS) Wet lubricant penetrating structure for cone shaft bearings of wet drawing machine.