Roll gap adjusting device of Demak imported bar mill

Abstract

The utility model relates to the technical field of steel rolling production, in particular to a roller gap adjusting device of a Demak imported bar mill, and aims to solve the problem that when the roller gap of a rolling mill is adjusted at present, as a circular shaft and an expansion type adjusting rod are selected for roller gap adjustment, the roller gap adjustment is usually influenced by the surface precision of the adjusting rod and the pre-tightening torque of a fastening bolt. The problems that the synchronous transmission performance of a right-handed rotation adjusting rod and a left-handed rotation adjusting rod is poor, the rolling mill roll gap adjusting precision is uncontrollable, an expansion connecting sleeve is difficult to replace on line, and finally the steel rolling quality is affected are solved. The device is mainly composed of left and right adjusting rods, left and right eccentric sleeves, a connecting block and the like, the roll gap adjusting device with the left and right adjusting rods is installed at a feeding port of the bar rolling mill, and through installation and fastening of the connecting block, the left and right adjusting rods are meshed synchronously to drive the left and right eccentric sleeves to rotate; therefore, the size of the roll gap of the rolling mill can be quickly, accurately and conveniently adjusted, the roll gap adjusting speed of the rolling mill is effectively improved, and the overall efficiency of steel rolling production is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of steel rolling production, in particular to a roll gap adjusting device for a Demark imported bar rolling mill. Background Art

[0002] The Demark imported rolling mill is a pre-finishing rolling mill for the bar production line. The rolling mill roll gap adjustment device is used for online adjustment of the rolling material type. Because the pre-finishing rolling mill has a high running speed and strict matching accuracy of the material type size, and also involves precise control of the finished bar size, high requirements are placed on the synchronization, adjustment accuracy and online operation reliability of the rolling mill roll gap adjustment device. The original design of the Demark imported rolling mill roll gap adjustment device uses a round shaft structure for the adjustment rod connection part, and then assembles it through an expansion sleeve. This type of rolling mill roll gap adjustment device is affected by the round shaft surface of the adjustment rod connection part, the surface accuracy of the inner hole of the expansion sleeve, and the pre-tightening torque of the fastening bolts. It is frequently the case that the synchronous transmission performance of the right-hand adjustment rod and the left-hand adjustment rod is poor and the adjustment accuracy of the rolling mill roll gap is uncontrollable due to insufficient mechanical tightening and transmission torque of the expansion sleeve. In addition, the expansion sleeve cannot be replaced online if an abnormality occurs, and the rolling mill can only be dismantled and repaired as a whole offline, which makes online maintenance inconvenient. During normal operation, the online adjustment accuracy of the rolling mill roll gap adjustment device is poor, and improper matching of material types between rolling mills can easily cause steel piling accidents. In addition, the level of control over the finished bar size is low, which seriously affects product quality and is not conducive to the stable control of the negative tolerance of the finished product size, resulting in high production costs. Utility Model Content

[0003] The utility model provides a Demark imported bar mill roll gap adjustment device to solve the problems existing in the above background.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A Demark imported bar rolling mill roll gap adjustment device comprises a right-handed adjustment rod, the circumferential outer side of the right-handed adjustment rod is meshed and rotatably connected with a right-handed eccentric sleeve, one side of the right-handed adjustment rod is detachably connected with a first connecting block and a second connecting block that are symmetrically fitted, the first connecting block and the second connecting block are connected with a left-handed adjustment rod, and the circumferential outer side of the left-handed adjustment rod is also meshed and rotatably connected with a left-handed eccentric sleeve that is symmetrical to the right-handed eccentric sleeve.

[0006] Furthermore, the outer circumferential sides of the right-handed adjustment rod and the left-handed adjustment rod are provided with external threads, and the right-handed eccentric sleeve and the left-handed eccentric sleeve are respectively engaged and rotatably connected with the right-handed adjustment rod and the left-handed adjustment rod through external threads.

[0007] Furthermore, a first hexagonal axial surface is provided on one side of the right-handed adjustment rod, and a second hexagonal axial surface is provided on one side of the left-handed adjustment rod. The contact surfaces of the first connecting block and the second connecting block are both provided with split hexagonal inner clamping surfaces, and the first hexagonal axial surface and the second hexagonal axial surface are both clamped and meshed with the split hexagonal inner clamping surfaces.

[0008] Furthermore, the first connecting block and the second connecting block are both matched and correspondingly provided with a plurality of fastening bolts.

[0009] The utility model has the following beneficial effects:

[0010] The utility model provides a Demark imported bar rolling mill roll gap adjustment device, which is mainly composed of left and right adjustment rods, left and right eccentric sleeves and connecting blocks and other components. The roll gap adjustment device with left and right adjustment rods is installed at the feed port of the bar rolling mill. After the connection block is installed and fastened, the left and right adjustment rods are synchronously meshed to drive the left and right eccentric sleeves to rotate, thereby realizing fast, accurate and convenient adjustment of the roll gap size of the rolling mill, effectively improving the rate of the roll gap adjustment of the rolling mill, and thus improving the overall efficiency of steel rolling production, solving the problem that when adjusting the roll gap of the rolling mill, a round shaft and an expansion type adjustment rod are used to adjust the roll gap, which is usually affected by the surface accuracy of the adjustment rod and the pre-tightening torque of the fastening bolt, resulting in poor synchronous transmission performance of the right-handed adjustment rod and the left-handed adjustment rod, uncontrollable roll gap adjustment accuracy of the rolling mill, and difficult to replace the expansion connection sleeve online, which ultimately affects the rolling quality of steel.

[0011] The utility model has high control accuracy for online adjustment of the material size of the rolling mill, improves the material matching ability between rolling mills, effectively controls the steel piling accident of the rolling mill, stably controls the negative tolerance of the finished product size, and greatly improves the product quality control ability. It has a simple structure, good synchronization, easy maintenance, and reliable use. Its structural features are suitable for fixed connection devices of synchronous transmission shafts of mechanical equipment, because it is easy to process, has low manufacturing cost, and has high practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0013] Figure 2 This is a schematic diagram of the overall structure of the connecting block of the utility model.

[0014] The meanings of the reference numerals are as follows:

[0015] 1. Right-handed adjustment rod; 2. Left-handed adjustment rod; 3. First connecting block; 4. Fastening bolt; 5. Right-handed eccentric sleeve; 6. Left-handed eccentric sleeve; 7. External thread; 8. First hexagonal axial surface; 9. Second hexagonal axial surface; 10. Second connecting block; 11. Split inner hexagonal surface of clamp. DETAILED DESCRIPTION

[0016] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0017] like Figure 1-2 As shown, a roll gap adjustment device of a Demark imported bar rolling mill comprises a right-handed adjustment rod 1, a right-handed eccentric sleeve 5 is meshed and rotatably connected to the outer circumference of the right-handed adjustment rod 1, a first connecting block 3 and a second connecting block 10 are detachably connected to one side of the right-handed adjustment rod 1, the first connecting block 3 and the second connecting block 10 are connected to the left-handed adjustment rod 2, and a left-handed eccentric sleeve 6 symmetrical to the right-handed eccentric sleeve 5 is also meshed and rotatably connected to the outer circumference of the left-handed adjustment rod 2. External threads 7 are provided on the outer circumferences of the right-handed adjustment rod 1 and the left-handed adjustment rod 2, and the right-handed eccentric sleeve 5 and the left-handed eccentric sleeve 6 are respectively meshed and rotatably connected to the right-handed adjustment rod 1 and the left-handed adjustment rod 2 through the external threads 7. A first hexagonal axial surface 8 is provided on one side of the right-handed adjustment rod 1, and a second hexagonal axial surface 9 is provided on one side of the left-handed adjustment rod 2. The contact surfaces of the first connecting block 3 and the second connecting block 10 are both provided with a split clamping inner hexagonal surface 11, and the first hexagonal axial surface 8 and the second hexagonal axial surface 9 are both clamped and meshed with the split clamping inner hexagonal surface 11. A plurality of fastening bolts 4 are also matched and provided on the first connecting block 3 and the second connecting block 10.

[0018] When the utility model is used in a specific application, the original rolling mill roll gap adjustment device is dismantled as a whole, and a right-handed adjustment rod 1 and a left-handed adjustment rod 2 with a first hexagonal axis surface 8 and a second hexagonal axis surface 9 are installed on the Demark imported bar rolling mill respectively, and the right-handed adjustment rod 1 and the left-handed adjustment rod 2 are fixedly connected through a first connecting block 3 and a second connecting block 10 with a split clamp inner hexagonal surface 11, so as to improve the convenience of disassembly and assembly. When the roll gap of the Demark imported bar rolling mill is adjusted, the right-handed adjustment rod 1 and the left-handed adjustment rod 2 can be synchronously rotated according to the actual roll gap size requirements, and the right-handed eccentric sleeve 5 and the left-handed eccentric sleeve 6 are driven to rotate in turn, so as to adjust the roll gap to the required size, effectively solving the problem that when the roll gap of the rolling mill is adjusted, the roll gap is adjusted by using a round shaft and an expansion type adjustment rod, which is usually affected by the surface accuracy of the adjustment rod and the pre-tightening torque of the fastening bolt, so that the adjustment accuracy of the roll gap of the rolling mill is uncontrollable, and the expansion connection sleeve is difficult to be replaced online, and finally affects the rolling quality of the steel. Therefore, the device has good practicality.

Claims

1. A Demark imported bar mill roll gap adjustment device, characterized by: The invention comprises a right-handed adjustment rod (1), the outer circumferential side of the right-handed adjustment rod (1) is meshed and rotatably connected to a right-handed eccentric sleeve (5), one side of the right-handed adjustment rod (1) is detachably connected to a first connecting block (3) and a second connecting block (10) that fit symmetrically, the first connecting block (3) and the second connecting block (10) are connected to a left-handed adjustment rod (2), and the outer circumferential side of the left-handed adjustment rod (2) is also meshed and rotatably connected to a left-handed eccentric sleeve (6) symmetrical to the right-handed eccentric sleeve (5).

2. According to claim 1, a Demark imported bar mill roll gap adjustment device is characterized by: The right-handed adjustment rod (1) and the left-handed adjustment rod (2) are both provided with external threads (7) on their circumferential outer sides, and the right-handed eccentric sleeve (5) and the left-handed eccentric sleeve (6) are respectively meshed and rotatably connected with the right-handed adjustment rod (1) and the left-handed adjustment rod (2) via the external threads (7).

3. The roll gap adjustment device of Demark imported bar rolling mill according to claim 2 is characterized by: A first hexagonal axial surface (8) is provided on one side of the right-handed adjustment rod (1), and a second hexagonal axial surface (9) is provided on one side of the left-handed adjustment rod (2). The contact surfaces of the first connecting block (3) and the second connecting block (10) are both provided with a split clamp inner hexagonal surface (11), and the first hexagonal axial surface (8) and the second hexagonal axial surface (9) are both clamped and meshedly connected with the split clamp inner hexagonal surface (11).

4. The roll gap adjustment device of Demark imported bar rolling mill according to claim 3 is characterized by: The first connecting block (3) and the second connecting block (10) are also matched with a plurality of fastening bolts (4) correspondingly arranged thereon.

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