KR100805560B1 - Apparatus for surface shape processing of pinch roll by using air pressure gap - Google Patents

Abstract

According to the present invention, the surface shape of the pinch roll for guiding the finished rolled strip to the winder during the hot rolling operation is restored to the shape at the time of the first injection by using the air pressure difference. A surface shape processing apparatus.

The present invention provides a surface shape processing apparatus for a pinch roll, comprising: a lifter and a lowering device unit which maintains a predetermined distance from the pinch roll through a detection rod of the pinch roll proximity sensing means while moving up and down on the pinch roll; A moving trolley that is installed to penetrate between the support units of the lifting and lowering unit and moves left and right while contacting the pinch roll; It is installed through the trolley work platform of the moving trolley portion, characterized in that it comprises a pinch roll grinding portion for grinding the pinch roll surface.

Pinch rolls, shape guide plates, holders, bokbok bogie body, guide cylinder, grindstone

Description

Apparatus for surface shape processing of pinch roll by using air pressure gap}

1 is a perspective view showing an installation state of the surface shape processing apparatus of the pinch roll using the air pressure difference according to an embodiment of the present invention.

FIG. 2 is a perspective view illustrating a lifting and lowering device unit in the surface shape processing apparatus of the pinch roll using the air pressure difference shown in FIG. 1. FIG.

3 is an exploded perspective view of the lifting and lowering unit shown in FIG. 2;

4 is a perspective view showing a moving trolley portion in the surface shape processing apparatus of the pinch roll using the air pressure difference shown in FIG.

5 is an exploded perspective view of the moving cart shown in FIG.

6 is an operation state diagram of air and oil in the surface shape processing apparatus of the pinch roll using the air pressure difference of the present invention.

Figure 7 is a pressure change state of the position of the processing apparatus of the present invention when pinch roll wear.

8 is a state diagram at the time of pinch roll processing without pressure change.

9 is a flow diagram illustrating the operational flow of the present invention.

<Explanation of symbols for main parts of drawing>

10: Pinch Roll 11: Roll Choke                 

21: pedestal 22: shape guide plate

28: lead screw 33: holder

41: detection rod 51: shuttle body

52: oil and pneumatic cylinder 60: guide rod

62: shape guide pin 74: bogie work platform

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface shape processing apparatus for pinch rolls, and in particular, continuous use by restoring the surface shape of the pinch rolls, which guide the finished rolled strip to the winder during hot rolling, to the shape at the time of first input by using the air pressure difference. The surface shape processing apparatus of a pinch roll using the air pressure difference which made this possible is related.

In general, a pinch roll is an electrical device that draws down the slab generated from the mold at a constant speed and is one of the important facilities of the performance equipment.

The pinch roll has a bad surface shape due to plate breaking, special steel rolling, foreign material insertion, poor cooling state of the material, poor shape of the material, or long-term use, so that various types of pinch roll marks are frequently generated on the surface of the product. As the number of products increased due to the increase in the number of units, it has been the cause of a significant drop in productivity, such as a decrease in direct rate.

When the pinch roll mark as described above occurs, the operator directly imports the pinch roll surface by hand using only the portion where the mark is generated, or uses the simple and rough equipment to polish the pinch roll surface.

However, this method has a problem that the risk of safety accidents of the worker is very high, as well as the productivity decrease due to the equipment stop during the import work.

The present invention has been made to solve the above problems of the prior art, it is possible to use continuously until discarded by one-time input of the pinch roll, and mechanical processing without manual mark processing and roll shape control of the pinch roll surface The purpose of this invention was to provide an apparatus for processing the surface shape of a pinch roll using an air pressure difference which can improve the direct rate and productivity while reducing the unit by unit.

The pinch roll surface shape processing apparatus using the air pressure difference according to the present invention for realizing the above object is a pinch roll surface shape processing apparatus, the pinch roll proximity detection means of lifting and lowering the upper portion of the pinch roll; Lifting and lowering device unit for maintaining a constant interval with the pinch roll through the sensing rod; A moving trolley that is installed to penetrate between the support units of the lifting and lowering unit and moves left and right while contacting the pinch roll; A pinch roll grinding unit installed through the trolley work platform of the moving cart and grinding the pinch roll surface; And a grinding shock buffer means installed between the reciprocating truck body of the moving cart and the workbench to mitigate an impact caused by grinding the pinch roll surface through a shovel spring. Characterized in that configured to include.                     

In the present invention, the lifting device is provided with a pedestal, a hydraulic cylinder coupled to the left and right ends of the pedestal, and a bogie stop switch on the bottom of the front with a long hole of a predetermined curvature on the inner surface and horizontally on the pedestal A shape guide plate connected to the holder, coupled to both rear left and right ends of the pedestal, a balance reversing limit switch coupled to the front left and right ends of the pedestal, and a bogie moving lead screw coupled between the holders; It characterized in that it comprises a reduction motor coupled to the coupling screw through one end of the lead screw.

In addition, in the present invention, the moving trolley portion is a reciprocating bogie body with a plurality of guide rods protruding from the bottom edge, the oil, pneumatic cylinder coupled to the upper surface of the reciprocating bogie body, the air supply line connected to the upper portion of the oil, pneumatic cylinder And a trolley workbench assembled to the guide rod through a shape guide pin assembled to the front center portion of the carriage body, a lead screw nut assembled to the rear center portion of the carriage body, and a plurality of guide cylinders installed on an upper surface thereof. And a flexible hose having one end connected to the hydraulic cylinder and the other end connected to the hydraulic cylinder.

In addition, in the present invention, the pinch roll grinding unit is a hydraulic motor, a grindstone guide plate connected to an upper portion of the hydraulic motor, a grindstone to which the grindstone guide plate is assembled, and a washer and the grindstone to penetrate the lower portion of the hydraulic motor. It characterized in that it comprises a fixing bolt to be coupled.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.                     

1 to 9 show an embodiment of the surface shape processing apparatus of the pinch roll using the air pressure difference of the present invention, the surface shape processing apparatus of the pinch roll according to the pinch roll while raising and lowering at the top of the pinch roll It is installed through the lifting and lowering device unit maintaining a constant distance from the pinch roll and the support rod of the lifting and lowering device unit through the sensing rod of the roll proximity sensing means, and the left and right reciprocating while contacting the pinch roll. It consists of a moving trolley | bogie which moves, and the pinch roll grinding part which penetrates the trolley | bogie work bench of the said mobile trolley | bogie, and grinds the said pinch roll surface.

As shown in FIGS. 1 through 3, the pair of lifting and lowering hydraulic cylinders 26 has a lower flange portion at the left and right ends of the pedestal 21, with bolts 27 and nuts 37. Is coupled, the pedestal 21 is left and right sides are provided with hexahedral coupling members (21-1, 21-2), the hexahedral support between the coupling member 21-3 is 1 The pair is connected.

In addition, at one side edge and edge of the bottom surface of the coupling members 21-1 and 21-2, a coupling member 21-4 to which the shape guide plate 22 described later is coupled to the bolt 23 is attached, and the coupling member At the bottom edges of the 21-1 and 21-2, a second connecting member 21-5, to which one end of the holder 33, which will be described later, is coupled, is attached to the bolt 35 and the nut 36.

In addition, at one corner of the coupling members 21-1 and 21-2, a third connection member 21-6, to which the balance reversing limit switch 24 is coupled to the bolt 25, is attached, and at one side of the coupling member 21. At the bottom edge of the bottom surface 21-2, a fourth connection member 21-7 to which the reduction motor 29 described below is coupled to the bolt 38 and the nut 39 is attached, and the shape guide plate 22 is a hexahedron. As a shape, a long hole 22-1 having a predetermined curvature in which a shape guide pin 62, which will be described later, is inserted is formed, and a bogie stop limit switch 48 is coupled to a bolt 49 at a lower end of a central portion of one side. 5 The connecting members 21-8 are attached.

The holder 33 has a shape in which left and right sides are inverted so that the bearing 32 is built in the center of the inner surface thereof, and the holder 33 has a bearing through the bolt 34 after the bearing 32 is embedded therein. The built-in state of 32) is maintained.

In addition, a trolley lead screw (hereinafter abbreviated as screw) 28 is provided to penetrate through the lead screw nut 67 and the bearing 32, which will be described later, and on both left and right ends of the screw 28, respectively. The fixed key 31 is coupled.

In addition, a fixed key 31 is coupled to the distal end of the reduction motor 29 and connected to a coupling 30 to be described later, and the coupling 30 is fixed to one end of the screw 28. Is connected through), the pinch roll proximity detection means is installed on the upper surface of the one side coupling member 21-2, which one end of the sensing rod 41 is inserted into the upper surface of the one side coupling member 21-2 After the sensing spring 42 is inserted into the other end of the sensing rod 41, the flange portion of the cover 43 is coupled by a plurality of bolts 44 and nuts 47, and the cover 43. A housing 43-1 in which one end of the sensing rod 41 and the sensing spring 42 are protruded is formed at the center of the inner surface of the inner surface of the cover 43, and the limit switch 45 is bolted to one side of the upper surface of the cover 43. 46) The sixth connecting member 21-9 to be joined is attached.

The moving cart is installed to penetrate between the support units 21-3 of the lifting and lowering unit, as shown in FIGS. 1, 4, and 5, and a plurality of guide rods 60 protrude from the bottom edge. The flange of the hydraulic and pneumatic cylinder 52 is coupled to the upper surface of the reciprocating bogie body 51, and the lower side of the left and right sides of the hydraulic and pneumatic cylinder 52 is connected to the flexible hose 54. One end is connected, and the other end of the flexible hose 54 is connected to the hydraulic cylinder 55 to be described later through the reciprocating carriage body 51.

In addition, as shown in FIG. 6, an air supply line is connected to the upper portion of the oil / pneumatic cylinder 52 through a plurality of electric valves, and the inside of the oil / pneumatic cylinder 52 is oiled by the air. The amount is adjusted.

In addition, a shape guide pin 62 is assembled to the front center portion of the carriage body 51 through the bearing 63, the washer 64, the nut 65, and the rear center portion of the carriage body 51. Lead screw nut 67 is assembled through a plurality of bolts 68 to the rectangular projection (51-1) protruding from.

In addition, the trolley working platform 74 is assembled to the guide rod 60, but the pipe-shaped induction cylinder 59 into which the guide rod 60 is inserted is formed at a predetermined height at an upper surface edge of the trolley working platform 74. It protrudes and the trolley | bogie stop limit 61 is attached to the upper end of one side induction cylinder 59.

The pinch roll grinding unit is installed through the trolley work platform 74, a flange connected to a lower portion of the hydraulic motor 70 passes through the trolley work platform 74, and the bolt 71 and the nut 72 are coupled to each other. The lower portion of the hydraulic motor 70 passes through the trolley work platform 74, the circular grindstone guide plate 77, and the cylindrical O, R, G (line roll grinding) grindstone 76, and a washer 79. And it is screwed to the fixing bolt 80 through the spring washer 81, the grindstone inner plate 77 and the grindstone 76 is assembled by bolts.

On the other hand, between the reciprocating bogie body 51 and the trolley work platform 74 is provided with a grinding shock buffer means for mitigating the impact of the pinch roll grinding, which is a flange of the hydraulic cylinder 55, the reciprocating bogie body The bolt 56 is assembled to the bottom of the 51, and the cylinder rod of the hydraulic cylinder 55 is assembled to the inner surface of the bogie workbench 74 via the shock absorber spring 57, and the bogie workbench 74. The angle control plate 73 is attached to one side of the upper surface.

Referring to the operation of the surface shape processing apparatus of the pinch roll using the air pressure difference according to the present embodiment configured as described above with reference to the flowchart of Figure 9 attached as follows.

When the shape of the surface of the pinch roll 10 becomes poor due to special steel rolling, plate breaking, foreign material insertion, poor cooling state of the material, poor shape of the material, or long-term use, the pinch roll ( 10) When the sensing rod 41 of the pinch roll proximity sensing means is raised after contacting the roll choke 11 according to the lowering operation of the hydraulic cylinder 26, the sensing rod 41 is ground. The lowering operation of the hydraulic cylinder 26 stops while being in contact with the limit switch 45, and the constant interval is maintained in a state where a collision between the pinch roll 10 and the grindstone 76 to be ground is prevented.

Thereafter, as shown in FIG. 6, the electric valve A is opened so that the air of the air supply line flows into the oil / pneumatic cylinder 52, and the oil pressure is supplied to the hydraulic cylinder 55 through the flexible hose 54. When the cylinder rod is lowered and the bogie stop limit 61 is separated from the bogie stop limit switch 48, the reduction motor 29 is operated to rotate the screw 28 while the reciprocating bogie body 51 ) Is moved between the balance inversion limit switch 24.

In the above process, the cylinder rod of the hydraulic cylinder 55 descends gradually while pushing the shobar spring 57 so that the grindstone 76 is in contact with the pinch roll 10, and the contact with the pinch roll 10 is reduced. When the hydraulic motor 70 is driven to complete the rotation of the grindstone 76, the electric valve A blocks the air so that the oil pressure converted from the air pressure inside the shape processing apparatus of the present invention to the grind 76 The surface of the pinch roll is ground by contacting the pinch roll 10.

Meanwhile, as illustrated in FIG. 7, the reciprocating carriage body 51 is left along the long hole 22-1 of the shape guide plate 22 processed into a shape such as a crown of the pinch roll 10. , The right reciprocating motion, the wear (strip passing) the air pressure drops, the non-wear portion rises phenomenon occurs, the grinding pressure of the non-wear portion is relatively increased to do a lot of grinding. Therefore, the operator can grind while determining the amount of wear and the amount of grinding while watching the wavelength of the pressure gauge needle shown in Figure 6 in the cab.

In this manner, as shown in FIG. 8, if there is no difference between the pressure gauge needles of the wear portion and the non-wear portion, grinding may be considered to be completed and a new profile (crown) is formed.

When the grinding on the surface of the pinch roll 10 is completed as described above, while the pressure of the electric valve air shown in FIG. 6 is released to the atmosphere, the expansion force of the shock absorbing spring 57 is applied to the cylinder of the hydraulic cylinder 55. The rod is raised to release the grindstone 76 from the finished pinch roll 10 surface.

In addition, the reciprocating bogie body 51 may come to the center of the shape guide plate 22 while the guide cylinder 59 and the bogie stop limit 61 of the upper portion of the trolley work platform 74 are raised together with the grindstone 76. When the gear stop limit switch 48 is in contact with the reduction motor 29 to stop the reciprocating operation of the reciprocating bogie body (51).

When the reduction motor 29 is stopped, the lifting and lowering device portion is raised in accordance with the operation of the hydraulic cylinder 26, and the operation of the surface shape processing apparatus of the pinch roll according to the present invention is finished.

The pinch roll surface shape processing apparatus using the air pressure difference of the present invention as described above can pinch roll shape control while watching the pressure gauge as well as the processing of the mark generated on the pinch roll surface by using the air pressure difference pinch roll It can be used continuously until the disposal of the roll with one injection, which reduces the number of pinch rolls, prolongs the life of the grinding machine, and greatly improves productivity such as reduction of raw units and improvement of straight rate.

Claims (4)

In the surface shape processing apparatus of the pinch roll, Lifting and lowering device unit for maintaining a predetermined interval with the pinch roll through the sensing rod of the pinch roll proximity sensing means while moving up and down on the pinch roll; A moving trolley that is installed to penetrate between the support units of the lifting and lowering unit and moves left and right while contacting the pinch roll; A pinch roll grinding unit installed through the trolley work platform of the moving cart and grinding the pinch roll surface; And Grinding shock buffer means is installed between the reciprocating body of the moving trolley and the trolley working platform to mitigate the impact of grinding the pinch roll surface through the shoba spring; Surface shape processing apparatus of the pinch roll using the air pressure difference, characterized in that configured to include. The method of claim 1, The lifting and lowering unit includes a pedestal, a hydraulic cylinder coupled to both left and right ends of the pedestal, and a bogie stop switch on the bottom of the front surface with a long hole of a predetermined curvature on the inner surface, and a shape guide plate connected horizontally to the pedestal. And a holder coupled to both rear left and right ends of the pedestal, a balance reversing limit switch coupled to both front left and right ends of the pedestal, a balance moving lead screw coupled between the holder, and the lead screw. A pinch roll surface shape processing apparatus using an air pressure difference, characterized in that it comprises a reduction motor coupled to the coupling via a fixed key at one end. The method of claim 2, The moving cart has a reciprocating bogie body with a plurality of guide rods protruding from the bottom edge, an oil and pneumatic cylinder coupled to an upper surface of the reciprocating bogie body, an air supply line connected to an upper portion of the oil and pneumatic cylinder, and the reciprocating bogie A balance workbench assembled to the guide rod through a shape guide pin assembled to the front center of the body, a lead screw nut assembled to the rear center of the reciprocating body, and a plurality of guide cylinders installed on an upper surface thereof, and one end of which is , The surface shape processing apparatus of the pinch roll using the air pressure difference, characterized in that it comprises a flexible hose connected to the pneumatic cylinder and the other end is connected to the hydraulic cylinder. The method of claim 1, The pinch roll grinding unit includes a hydraulic motor, a grindstone guide plate connected to an upper portion of the hydraulic motor, a grindstone to which the grindstone guide plate is assembled, and a fixing bolt coupled to a lower portion of the hydraulic motor through the washer and the grindstone. Surface processing apparatus for the pinch roll using the air pressure difference, characterized in that.

Images