KR19990041363U - Grease Feeder of Rolling Mill - Google Patents

Abstract

The present invention relates to a grease supply apparatus of a rolling mill, and in particular, an inner cell coupled to a roll neck 3-1 of a rolling roll 5 and having an injection passage 9-1 for inserting a nipple 18 on one side thereof. (9); An outer cell 10 external to the inner cell 9 so as to form a grease storage chamber 22; A piston (13) embedded in the grease storage chamber (22) so as to slide in an axial direction; A discharge main groove 11-1 and a connection hole 11-coupled to the roll neck 3-1 so as to be positioned between the inner and outer cells 9 and 10 and the yoke coupling 2 and successively formed in the axial direction. 4) a close contact plate 11 is formed in the circumferential direction; A pilot bolt 21 inserted into the discharge main groove 11-1 and the connection hole 11-4 and having a flow path 21-1 formed therein; Is inserted into the hole 13-1 of the piston 13 so as to elastically move forward and backward by the spring 14, the connection hole 20-3 for inserting the pilot bolt 21 in the front end surface is formed , The header 20-1 is installed at the rear end, and a pilot spool 20 having a discharge passage 20-2 for connecting the flow passage 21-1 and the grease storage chamber 22 to the inside thereof. The grease supply apparatus of the rolling mill characterized by the above-mentioned.

Description

Grease Feeder of Rolling Mill

The present invention relates to a grease supply device of a rolling mill, and in particular, a grease with a lubricating function to prevent cooling water and prevent wear of the mating surface between the yoke coupling and the roll neck of the spindle of the rolling mill. It relates to a grease supply device of a rolling mill for automatically supplying oil.

In general, in the hot rolling process, a slab heated at a temperature of about 1250 to 1350 ° C. in a heating furnace passes through a rough mill and a finishing mill, and is then rolled into a desired hot coil.

At this time, the conventional rolling mill as shown in Figure 1 the driving force of the spindle (1) driven by the motor is transmitted to the rolling roll 5 through the yoke coupling (2), the rolling roll is rolled at both ends of each It is supported by the choke 4.

In addition, the rolling mill is sprayed with the coolant is injected through the cooling water injection header 8 installed in front and rear to prevent the surface temperature rise of the rolling roll 5 according to the continuous rolling of the hot slab 6, the sprayed cooling water to the top of the slab The stripper 7 is installed to prevent the falling phenomenon.

On the other hand, after continuously rolling for 4 to 6 hours to make the hot slab 6 into a hot coil having a target thickness, the rolling rolls are periodically dismantled for the roll surface polishing operation of the rolling rolls 5.

When the polished rolling roll 5 is remounted, grease is applied to the roll neck 3 and then inserted into the yoke coupling 2. At this time, the grease that was lubricated between the roll neck 3 and the yoke coupling 2 was applied. Is washed by the cooling water of the injection header 8 flowing along the tip of the stripper 7 and can no longer be lubricated.

As such, when the grease lubricating between the roll neck 3 and the yoke coupling 2 is removed by the coolant, the joint between the roll neck 3 and the yoke coupling 2 is prematurely worn, which may cause a shortened life. .

The object of the present invention is to provide a grease supply device of a rolling mill that automatically supplies grease with a lubrication function to prevent coolant blocking and mating surface wear between the yoke coupling of the spindle and the roll neck. There is this.

1 is a perspective view showing a conventional rolling mill,

FIG. 2 is an enlarged view of portion A of FIG. 1;

Figure 3 is a partial perspective view showing a rolling mill equipped with a grease supply apparatus according to the present invention,

4 is a cross-sectional view taken along line X-X of FIG. 3;

5 is an exploded perspective view showing a grease supply apparatus of a rolling mill according to the present invention,

Figure 6 is a cross-sectional view showing a state before operation of the grease supply apparatus of the rolling mill according to the present invention,

7 is a cross-sectional view showing a state after the operation of the grease supply apparatus of the rolling mill according to the present invention.

<Description of the symbols for the main parts of the drawings>

DESCRIPTION OF SYMBOLS 1: Spindle 2: Yoke coupling 3, 3-1: Roll neck 4: Roll choke 5: Rolling roll 6: Hot slab 7: Stripper 8: Injection header 9: Inner cell 10: Outer cell 11: Contact plate 12: Gasket 13 : Piston 14: Spring 15, 16, 17: Oil ring 18: Nipple 19: Fixing bolt 20: Pilot spool 21: Pilot bolt

In order to achieve the above object, the present invention is coupled to the roll neck of the rolling roll, the inner cell is formed with an injection passage for inserting the nipple on one side; An outer cell external to the inner cell to form a grease storage chamber; A piston embedded in the grease storage chamber to slide in an axial direction; An adhesion plate coupled to the roll neck so as to be positioned between the inner and outer cells and the yoke coupling, and having a plurality of discharge main grooves and connection holes formed in the axial direction in a circumferential direction; A pilot bolt inserted into the discharge main groove and a connection hole and having a flow path formed therein; It is inserted into the hole of the piston to be elastically moved forward and backward, the connection hole for inserting the pilot bolt is formed in the front end surface, the header is installed at the rear end, the outlet for connecting the flow path and the grease storage chamber inside Provided is a grease supply apparatus for a rolling mill, characterized in that the flow passage is formed of a pilot spool.

The configuration of the present invention will be described with reference to the drawings.

Figure 3 is a partial perspective view showing a rolling mill equipped with a grease supply apparatus according to the present invention, Figure 4 is a sectional view XX of Figure 3, Figure 5 is an exploded perspective view showing a grease supply apparatus of a rolling mill according to the present invention, Figure 6 Is a cross-sectional view showing a state before operation of the grease supply apparatus of the rolling mill according to the present invention, Figure 7 is a cross-sectional view showing a state after operation of the grease supply apparatus of the rolling mill according to the present invention.

First, the roll neck (3-1) according to the present invention is not only the insertion portion inserted into the yoke coupling (2) of the spindle (Spindle) of the rolling mill, but the entire outer peripheral surface is formed in a polygonal shape. .

In addition, the inner shell 9 coupled to the outer circumferential surface of the roll neck 3-1 so as to slide only in the axial direction has an inner circumferential surface formed in the same polygonal shape as the outer circumferential surface of the roll neck and rotates as the roll neck rotates.

At this time, the outer shell 10 is attached to the plurality of fixing bolts 19 in the inner cell 9, and the gasket 12 is inserted into the contact surface between the inner cell and the outer cell to block the outflow of grease.

In addition, in the grease storage chamber 22 formed between the inner cell 9 and the outer shell 10, the piston 13 is embedded so as to slide back and forth, and in particular, in the grease storage chamber between the outer circumferential surface of the piston and the inner circumferential surface of the outer cell when the piston moves. Insert the oil ring 16 on the outer circumferential surface of the piston to prevent the filling grease from leaking.

Here, an injection passage 9-1 is formed at one side of the inner cell 9 so that the grease storage chamber 22 can be filled with grease from outside, and the nipple 18 is screwed on the outside of the injection passage. .

In addition, four through holes 13-1 are formed at the center of the piston 13 so as to be spaced apart from each other in the circumferential direction, and the pilot spool 20 is formed in each of the through holes in which the oil ring 16 is fitted on the inner circumferential surface thereof. It penetrates back and forth.

At this time, the header 20-1 is formed at the rear end of the pilot spool 20, which is embedded in the grease storage chamber 22, and the discharge passage 20-2 formed along the axial center of the pilot spool has its rear end side. It is formed in the radial direction to contact the header 20-1 and is opened and closed by the through hole 13-1.

In addition, a connecting hole 20-3 is formed at the front end side of the pilot spool 20 so as to be connected to the discharge passage 20-2, and an inner circumferential surface of the connecting groove 20-3 formed larger than the inner diameter of the discharge passage. The female thread is formed so that the pilot bolt 21 is screwed together.

On the other hand, in the close contact plate 11, on which the oil ring 17 is mounted on the inner circumferential surface sliding along the polygonal outer circumferential surface of the roll neck 3-1, the discharge main groove 11- coaxially located with the through hole 13-1. 1) and the connection hole 11-4 are formed in succession.

At this time, the flow path groove 11-3 in the circumferential direction connecting the four discharge main grooves 11-1 to each other on the front surface of the contact plate 11 forming the oil film between the end face of the yoke coupling 2. Is formed, and the flow path grooves 11-2 which guide the grease discharged from the four discharge main grooves in the radial direction are formed, respectively.

The grease flow passage 21 is connected to the discharge flow passage 20-2 in the pilot bolt 21, which is inserted into the discharge main groove 11-1, respectively, and is screwed into the connection holes 11-4 and 20-3. -1) is formed.

In addition, the compression spring 14 coupled to the pilot spool 20 is compressed between the contact plate 11 and the piston 13 when the pilot spool 20 is reversed, and then returns the piston to the header 20-1. Pushed.

Hereinafter, the operation of the present invention.

When the rolling roll 5 is regularly replaced, the roll neck 3-1 is taken out of the yoke coupling 2 to take out the rolling roll, and after the surface of the worn rolling roll is subjected to regenerative polishing, the regenerative polishing is performed. Grease is filled in the grease storage chamber 22 through the nipple 18 before mounting this completed rolling roll again.

At this time, the header 21 is advanced by the grease filled with the piston 13 in a state where the header 21 is completely in contact with the inner surface of the piston 13 by the shock absorbing spring 14 and is in close contact with the inner jaw of the outer cell 10. .

When the grease filling of the grease storage chamber 22 is completed, the roll neck 3-1 is inserted into the yoke coupling 2 to remount the rolling roll 5.

Here, the roll neck (3-1) is gradually inserted into the yoke coupling (2) in the installation process of the rolling roll (5) while the close contact plate 11 is in close contact with the right end surface of the yoke coupling of the buffer spring (14) The elastic force is won and pushed to the right.

At the same time, as the pilot spool 20 is reversed to the right, the header 20-1 is separated from the inner surface of the piston 13, and the inlet of the discharge passage 20-2, which is blocked by the inner circumferential surface of the piston, is opened. do.

At this time, the grease of the grease storage chamber 22 that is elastically compressed by the piston 13 flows into the open discharge passage 20-2 and the four discharge main grooves 11-11 through the grease passage 21-1. 1) is temporarily stored and flows along the flow path grooves 11-2 and 11-3 to form an oil film between the yoke coupling 2 and the contact plate 11, and when the yoke coupling rotates, It penetrates between the roll necks and lubricates them.

On the other hand, the oil ring 17 between the inner circumferential surface of the contact plate 11 and the outer circumferential surface of the roll neck 3-1 is filled between the yoke coupling 2, the roll neck 3-1, and the contact plate during the movement of the contact plate. It blocks the outflow of the lubricating grease which is present, and at the same time blocks the inflow of the cooling water injected from the injection header 8.

Meanwhile, as the volume of the grease is reduced as the grease in the grease storage chamber 22 is discharged to the discharge passage 20-2, the piston 13 is advanced by the compressive elastic force of the shock absorber 14 to compress the grease in the grease storage compartment. At some point, the inner surface of the piston is in close contact with the header 20-1 to block the discharge flow path 20-2, thereby preventing further grease discharge.

The present invention automatically prevents accidents due to breakage of the coupling part by automatically supplying grease with lubrication function to prevent coolant blocking and mating surface wear between the yoke coupling of the spindle and the roll neck of the rolling mill. It is possible to prevent the damage and to improve the productivity of the work.

Claims (2)

An inner cell 9 coupled to the roll neck 3-1 of the rolling roll 5 and having an injection passage 9-1 for inserting the nipple 18 on one side thereof; An outer cell 10 external to the inner cell 9 so as to form a grease storage chamber 22; A piston (13) embedded in the grease storage chamber (22) so as to slide in an axial direction; A discharge main groove 11-1 and a connection hole 11-coupled to the roll neck 3-1 so as to be positioned between the inner and outer cells 9 and 10 and the yoke coupling 2 and successively formed in the axial direction. 4) a close contact plate 11 is formed in the circumferential direction; A pilot bolt 21 inserted into the discharge main groove 11-1 and the connection hole 11-4 and having a flow path 21-1 formed therein; Is inserted into the hole 13-1 of the piston 13 so as to elastically move forward and backward by the spring 14, the connection hole 20-3 for inserting the pilot bolt 21 in the front end surface is formed , The header 20-1 is installed at the rear end, and a pilot spool 20 having a discharge passage 20-2 for connecting the flow passage 21-1 and the grease storage chamber 22 to the inside thereof. Grease supply device of the rolling mill. The method of claim 1, The grease supply apparatus of the rolling mill, characterized in that the flow path grooves (11-2, 11-3) connected to the discharge main groove (11-1) is formed on the front of the contact plate (11).