阅读说明：本技术 一种卷取机钳口扇形板高压油孔的封堵方法 (Method for plugging high-pressure oil hole of jaw sector plate of coiling machine ) 是由 张卫东 陈政权 杨可托 李锋 郭军旗 倚国宏 于 2019-09-10 设计创作，主要内容包括：本发明公开了一种卷取机钳口扇形板高压油孔的封堵方法,步骤包括：步骤1、在钳口扇形板的每个高压油孔对外开口处分别加工各自的预安装孔；步骤2、清理每个高压油孔中的异物；步骤3、根据每个预安装孔的尺寸确认相应密封堵头的规格；步骤4、在钳口扇形板的每个高压油孔预安装孔中装入一个对应的密封堵头,直至钢球进入套筒的中部,钢球的顶端没入套筒上端面为止。本发明方法,完全能够满足精度及使用要求,降低制造成本、节约时间,提高了装配效率,具有很好的实用性。(The invention discloses a method for plugging a high-pressure oil hole of a jaw sector plate of a coiling machine, which comprises the following steps: step 1, respectively processing a pre-mounting hole at an external opening of each high-pressure oil hole of a jaw sector plate; step 2, cleaning foreign matters in each high-pressure oil hole; step 3, confirming the specification of the corresponding sealing plug according to the size of each pre-installation hole; and 4, installing a corresponding sealing plug in each high-pressure oil hole pre-installation hole of the jaw sector plate until the steel ball enters the middle of the sleeve and the top end of the steel ball is submerged into the upper end face of the sleeve. The method of the invention can completely meet the requirements of precision and use, reduce the manufacturing cost, save the time, improve the assembly efficiency and have good practicability.)

1. A method for plugging a high-pressure oil hole of a jaw sector plate of a coiling machine is characterized by comprising the following steps of:

step 1, respectively processing a pre-mounting hole at an external opening of each high-pressure oil hole of a jaw sector plate (1);

step 2, cleaning foreign matters in each high-pressure oil hole;

step 3, confirming the specification of the corresponding sealing plug (5) according to the size of each pre-installation hole,

the diameter and length of the sealing plug (5) are prepared, the matching size is checked, and the upper edge of the sleeve (8) is ensured not to be higher than the surface contour of the jaw sector plate (1) after the sleeve (8) is installed in place;

step 4, installing a corresponding sealing plug (5) in each high-pressure oil hole pre-installation hole of the jaw sector plate (1),

firstly, a sleeve (8) of each sealing plug (5) is placed into a corresponding pre-installation hole, the upper edge of the sleeve (8) is ensured to be not higher than the surface contour of a high-pressure oil hole of a jaw sector plate (1), and the convex state of a steel ball (9) half-loaded into the sleeve (8) is kept; and then the steel ball (9) is hit by installing the drill rod (10) to move downwards until the steel ball (9) enters the middle part of the sleeve (8) and the top end of the steel ball (9) is submerged into the upper end surface of the sleeve (8).

2. The method for plugging the high-pressure oil hole of the jaw sector plate of the coiling machine according to claim 1, characterized in that in the step 1, the specific process is,

and drilling is carried out at the external opening of each high-pressure oil hole, so that the tolerance of each pre-mounting hole is controlled within the numerical range of the specification table in table 1, the bottom chamfer angle is 120 degrees, the size of the step hole table surface at the lower part of each pre-mounting hole meets the requirement of the specification table, and each pre-mounting hole meets the requirement of the penetration depth of the sleeve (8).

3. The method for plugging the high-pressure oil hole of the coiler jaw sector plate according to claim 2, wherein in the step 1, the content of a specification table is,

TABLE 1 specification Table

In the above specification table, d₁Is the outer diameter of the sleeve (8) |₁Is the clear height of the sleeve (8) |₂The height of the steel ball (9) exposed out of the upper end surface of the sleeve (8); d₂Is the nominal size of the pre-installation hole, and the following + 0.1-0 is the tolerance.

4. The method for plugging the high-pressure oil hole of the jaw sector plate of the coiling machine according to claim 1, wherein the sealing plug (5) comprises a sleeve (8) capable of expanding in the radial direction and a steel ball (9), the steel ball (9) is placed in an inner cavity of the sleeve (8), the wall of the inner cavity of the sleeve (8) is a smooth circumferential surface, and a plurality of annular grooves are formed in the middle of the outer surface of the sleeve (8).

5. The method for plugging the high-pressure oil hole of the jaw sector plate of the coiling machine according to claim 1, characterized in that the lower end surface of the installation drill rod (10) is a spherical groove.

Technical Field

The invention belongs to the technical field of mechanical equipment manufacturing, and relates to a method for plugging a high-pressure oil hole of a jaw sector plate of a coiling machine.

Background

A coiler is an important equipment in a rolling mill, which is installed in front of and behind a single stand reversible cold strip mill after being disposed at a finishing stand on a hot strip continuous mill, a cold strip continuous mill and a wire rod mill, for coiling a hot rolled or cold rolled steel into a roll shape. The reel drum is an important part of the reel-up, while the jaw sector plates are important parts of the reel drum. The blocking technology of the jaw sector plate oil hole is a very key assembly point, and influences whether the coiling machine can be normally used or not.

Disclosure of Invention

The invention aims to provide a method for plugging a high-pressure oil hole of a jaw sector plate of a coiling machine, which solves the problems that in the prior art, the high-pressure oil hole of the jaw sector plate in a coiling drum is easily cracked, the oil way is easily leaked and decompressed, and the sector plate is easily broken and scrapped due to the adoption of a plug welding mode.

The invention adopts the technical scheme that a method for plugging a high-pressure oil hole of a jaw sector plate of a coiling machine adopts a sealing plug, and is implemented according to the following steps:

step 1, respectively processing a pre-mounting hole at an external opening of each high-pressure oil hole of a jaw sector plate;

step 2, cleaning foreign matters in each high-pressure oil hole;

step 3, confirming the specification of the corresponding sealing plug according to the size of each pre-installation hole,

preparing the diameter and length of the sealing plug, checking the matching size, and ensuring that the upper edge of the sleeve is not higher than the surface contour of the jaw sector plate after the sleeve is installed in place;

step 4, installing a corresponding sealing plug in each high-pressure oil hole pre-installation hole of the jaw sector plate,

firstly, placing a sleeve of each sealing plug into a corresponding pre-installation hole, ensuring that the upper edge of the sleeve is not higher than the surface profile of a high-pressure oil hole of a jaw sector plate, and keeping the convex state of a steel ball half-loaded sleeve; and then the drill rod is arranged to strike the steel ball to move downwards until the steel ball enters the middle part of the sleeve, and the top end of the steel ball is submerged into the upper end surface of the sleeve.

The invention has the advantages of simple and reasonable assembly operation, few steps, satisfactory accuracy and good high-pressure sealing effect.

Drawings

FIG. 1 is a perspective view of a coiler drum assembly that is the subject of the method of the present invention;

FIG. 2 is a perspective view of a jaw sector plate of the work object of the method of the invention;

FIG. 3 is an elevation of the outer surface of a jaw sector plate of the object of the inventive method;

FIG. 4 is an elevational view of the inside surface of a jaw sector plate of the work object of the method of the invention;

FIG. 5 is a vertical sectional view of a jaw cylinder position high-pressure oil hole of a jaw sector plate which is a working object of the method;

FIG. 6 is a longitudinal sectional view of a jaw cylinder position high pressure oil hole of a jaw sector plate of a work object of the method of the present invention;

FIG. 7 is a schematic view of a conventional plug welding of a high pressure oil hole;

FIG. 8 is a schematic view of a sealing plug used in the method of the present invention for plugging a high pressure oil hole;

figure 9a is a schematic cross-sectional view of a sealing plug used in the method of the present invention,

FIG. 9b is an elevational view of a sealing plug used in the method of the present invention;

figure 10a is a perspective view of an installation drill rod used in the method of the invention,

FIG. 10b is a cross-sectional view of an installation drill rod used in the method of the present invention;

fig. 11 is a schematic view of the sealing plug in use after installation in the method of the present invention.

In the figure, 1, a jaw sector plate, 2, a sector plate I, 3, a sector plate II, 4, a sector plate III, 5, a sealing plug, 6, a welding plug layer, 7, a screw plug, 8, a sleeve, 9, a ball and 10 are provided with a drill rod.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1, the three-dimensional structure of the coiler mandrel assembly which is the working object of the present invention is schematically shown, and the coiler mandrel assembly comprises a jaw sector plate 1, a sector plate I2, a sector plate II 3 and a sector plate III 4 which jointly form a cylindrical mandrel assembly.

Referring to fig. 2, 3 and 4, the detailed view of the jaw sector plate 1 of the work object of the present invention is shown, wherein fig. 2 is a perspective view of the jaw sector plate 1, fig. 3 is an external surface front view of the jaw sector plate 1, and fig. 4 is an internal surface front view of the jaw sector plate 1.

Referring to fig. 5 and 6, the specific positions for plugging the high-pressure oil holes in the jaw sector plate 1 by the method of the present invention are shown.

Referring to fig. 1, 5, 6 and 8, the method of the present invention uses a sealing plug 5 with a novel structure to plug the high pressure oil hole in the jaw sector plate 1, and the pressure resistance value is up to 450 bar (45MPa), while the pressure resistance value of the oil path system in the existing jaw sector plate 1 is generally not more than 14 MPa. The sealing plug 5 has excellent corrosion resistance; the allowable tolerance range is large: the thickness can be controlled to be 0-0.1mm, while the processing tolerance of the traditional method is 0-0.02 mm, so that the processing is not easy to control; the installation process is simple and convenient; the reliable plugging is realized by adopting a pure mechanical occlusion mode, and the advantages are not available in the traditional plugging method.

Referring to fig. 7, in a conventional blocking manner of the high-pressure oil hole, a plug 7 is firstly blocked in an external opening of the high-pressure oil hole, and the external end surface of the opening of the high-pressure oil hole is subjected to blocking welding by using a blocking welding layer 6. According to the welding and plugging mode, the clamp hole sector plate 1 is generally made of materials such as 42CrMn and the like, the carbon content is high, the heat treatment state of a nitrided surface exists, meanwhile, the clamp hole sector plate 1 is stressed greatly in the use state, through the plugging welding, cracks are often generated at the plugging position of the clamp hole sector plate 1, the stress condition of the clamp hole sector plate 1 is seriously influenced, and the clamp hole sector plate 1 is easy to break and cannot be used when the cracks are serious, so that the serious quality problem is caused.

Referring to fig. 9a, 9b and 11, the sealing plug 5 comprises a sleeve 8 capable of expanding radially and a steel ball 9 capable of generating radial expansion force on the sleeve 8, the steel ball 9 is arranged in an inner cavity of the sleeve 8, the wall of the inner cavity of the sleeve 8 is a smooth circumferential surface, and a plurality of annular grooves are formed in the middle of the outer surface of the sleeve 8. Based on the press-in-expansion principle, the sealing plug 5 is used for extruding a steel ball 9 into the middle of an inner cavity of the sleeve 8 to enable the sleeve 8 to slightly expand radially, the annular groove sharp teeth on the outer surface of the middle of the sleeve 8 are pressed into high-pressure oil hole pre-mounting holes made of relatively low-hardness materials, or the sleeve 8 is extruded into high-pressure oil hole pre-mounting holes with relatively high-hardness rough surfaces, and accordingly the sealing plug is meshed and sealed with the high-pressure oil hole pre-mounting holes of the jaw sector plate 1. The steel ball 9 is pressed to enter the inner cavity of the sleeve 8 downwards, and when the top end of the steel ball 9 is lower than the upper edge of the sleeve 8, the mounting procedure is completed. After the steel ball 9 moves downwards, the upper port edge of the sleeve 8 automatically slightly shrinks inwards, so that the risk of falling-off of the steel ball 9 is avoided. The plugging method can ensure that the pressure resistance value of the system can reach 45MPa (450 bar) at most, and the pressure resistance value of the system of the common jaw sector plate 1 is 14MPa, thereby well meeting the use requirements.

Referring to fig. 10a and 10b, which are schematic structural views of the installation drill rod 10 adopted in the method of the present invention, the lower end surface of the installation drill rod 10 is a spherical groove, and the curved surface shape of the spherical groove is consistent with the curved surface shape of the steel ball 9.

Referring to fig. 10a, 10b and 11, the sealing plug 5 adopting the ball expansion mode in the method of the invention is mounted by adopting a mounting drill rod 10 to downwards extrude the steel ball 9 or by utilizing a hand hammer to downwards strike and extrude the steel ball 9.

The invention relates to a method for plugging a high-pressure oil hole of a jaw sector plate of a coiling machine, which adopts the sealing plug 5 and is implemented according to the following steps:

step 1, respectively processing a pre-installation hole at the external opening of each high-pressure oil hole of the jaw sector plate 1,

as shown in fig. 8, 9b and 11, drilling (reaming) is performed at the external opening of each high-pressure oil hole, so that the tolerance of each pre-installation hole is required to be within the numerical range of the specification table of the following table 1, generally 0-0.1mm, the bottom chamfer angle is 120 degrees, the tolerance of each pre-installation hole is controlled, so as to ensure that each sleeve 8 generates the required expansion amount under the compression, the size of the table top of the stepped hole at the lower part of each pre-installation hole is required to meet the requirement of the specification table, and each pre-installation hole is required to meet the requirement of the penetration depth of the sleeve 8;

TABLE 1 specification Table

In the above specification table, d₁Is the outer diameter of the sleeve 8,/₁Is the clear height of the sleeve 8, |₂The height of the steel ball 9 exposed from the upper end surface of the sleeve 8, d₂Is the nominal size of the pre-installation hole, and the following + 0.1-0 is the tolerance.

Step 2, cleaning foreign matters in each high-pressure oil hole,

as shown in the figures 5 and 6, foreign matters such as iron chips, grease and the like in the high-pressure oil hole are cleaned, so that the smoothness of the oil way is ensured, the cleanness of the oil way is ensured, and the phenomenon that the smooth flowing of oil is influenced by the blockage of the high-pressure oil hole and the like is avoided.

Step 3, confirming the specification of the corresponding sealing plug 5 according to the size of each pre-installation hole,

as shown in fig. 9, the diameter and length dimensions of the sealing plug 5 are configured, and the fitting dimensions are checked to ensure that the upper edge of the sleeve 8 is not higher than the surface contour of the jaw sector plate 1 after the sleeve 8 is mounted in place;

step 4, installing a corresponding sealing plug 5 in each high-pressure oil hole pre-installation hole of the jaw sector plate 1,

as shown in fig. 11, the sleeve 8 of each sealing plug 5 is firstly placed into the corresponding pre-installation hole, the upper edge of the sleeve 8 is ensured to be not higher than the surface profile of the high-pressure oil hole of the jaw sector plate 1, and the convex state of the steel ball 9 half-installed in the sleeve 8 is maintained; and then the steel ball 9 is hit by mounting the drill rod 10 to move downwards until the steel ball 9 enters the middle part of the sleeve 8 and the top end of the steel ball 9 is submerged into the upper end surface of the sleeve 8, so that the steel ball 9 is ensured not to be separated, and the steel ball forming device is formed.