Anti-backlash mechanism for hot rolling circle shear

Abstract

An anti-backlash mechanism for a hot rolling circle shear is used in the field of metallurgy plate and strip shearing equipment. A fixing screw rod of the left side wedge block passive anti-backlash mechanism penetrates through a middle pin hole of a trapezoidal wedge block and is installed on a circle shear movable base, the trapezoidal wedge block is locked by a locking nut below the fixing screw rod, and the left side and the right side of the trapezoidal wedge block are each provided with a copper sliding plate; a disc spring outer sleeve of the right side disc spring inclined wedge active anti-backlash mechanism is arranged on a disc shear moving base, a disc spring pre-tightening nut is arranged in a disc spring outer sleeve threaded hole, a disc spring pressing block abuts against the upper end face of a disc spring set, the disc spring set is arranged on a disc spring center shaft, the output end face of the disc spring center shaft is tightly attached to an anti-backlash inclined wedge, and a copper sliding plate is arranged on the right side of the anti-backlash inclined wedge. The inclined surface on the left side of the anti-backlash wedge is matched with the inclined surface on the circle shear moving base. According to the utility model, a gap between the circle shear movable base and the circle shear fixed base can be smaller, the sliding precision is higher, all parts can be localized, and daily maintenance and equipment repair are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of metallurgical shearing equipment, and specifically relates to a clearance eliminating mechanism for a hot rolling circular shear. Background Art

[0002] As a key step in the strip steel production process, the circular shear in the hot rolling mill is the core functional equipment of the mill. The circular shear equipment belongs to equipment with relatively high precision and professionalism. In recent years, problems such as difficult adjustment of equipment width and change of width during the shearing process have generally occurred, seriously affecting the strip steel shearing quality and production line efficiency. The existing domestic hot rolling circular shears mainly have the following deficiencies:

[0003] 1. Most of the domestic hot rolling circular shears are imported, and most of them have been in use for a long time, with frequent operation and maintenance, high maintenance costs, and require foreign manufacturers for repair and maintenance.

[0004] 2. Since most of them are imported equipment, domestic spare parts cannot meet the on-site use requirements, while imported spare parts are expensive and have a long delivery time, and the site is basically in a state of no spare parts.

[0005] 3. Due to the long service life of the equipment, problems such as difficult adjustment of width and change of width during the shearing process have generally occurred, seriously affecting the strip steel shearing quality and production line efficiency, and there is an urgent need for domestic improvement solutions and measures.

[0006] 4. The existing clearance eliminating structures generally use the technical solution of direct sliding of copper slide plates, which causes wear on the side of the guide rail during the working process, resulting in an increase in the gap between the moving slide and the slide rail, poor guiding performance, and increased sliding resistance. Summary of the Invention

[0007] In order to overcome the deficiencies of the prior art, the invention purpose of the utility model is to provide a clearance eliminating mechanism for a hot rolling circular shear to meet the standard requirements for the width of the strip steel sheared by the hot rolling circular shear.

[0008] To achieve the above invention purpose, the clearance eliminating mechanism of the hot rolling circular shear of the utility model is composed of a left wedge block passive clearance eliminating mechanism and a right disc spring inclined wedge active clearance eliminating mechanism. Both the left wedge block passive clearance eliminating mechanism and the right disc spring inclined wedge active clearance eliminating mechanism are installed on the moving base of the circular shear, and the moving base of the circular shear is slidably connected to the fixed base of the circular shear.

[0009] Furthermore, the left wedge block passive clearance eliminating mechanism is composed of a copper slide plate, a trapezoidal wedge block, a fixing screw, and a locking nut; the fixing screw passes through the middle pin hole of the trapezoidal wedge block to install the trapezoidal wedge block on the moving base of the circular shear, and the trapezoidal wedge block is locked by the locking nut below the fixing screw. A copper slide plate for the moving base of the circular shear to slide on the fixed base of the circular shear is installed on each of the left and right sides of the trapezoidal wedge block.

[0010] Furthermore, the right disc spring inclined wedge active clearance elimination mechanism consists of a copper slide plate, a clearance elimination inclined wedge, a disc spring outer sleeve, a disc spring central shaft, a disc spring pressing block, a disc spring group, and a disc spring pre-tightening nut; the disc spring outer sleeve is installed on the moving base of the circular shear, and there is a threaded hole above the disc spring outer sleeve. The disc spring pre-tightening nut is an external threaded nut and is installed in the threaded hole of the disc spring outer sleeve. The disc spring pressing block installed inside the disc spring outer sleeve abuts against the upper end face of the disc spring group. The disc spring pre-tightening nut provides a pre-tightening force for the disc spring group through the disc spring pressing block. The disc spring group is installed on the disc spring central shaft to transmit the pre-tightening force of the disc spring group to the disc spring central shaft. The output end face of the disc spring central shaft closely abuts against the clearance elimination inclined wedge. A copper slide plate is installed on the right side of the clearance elimination inclined wedge. During the movement of the moving base of the circular shear, the copper slide plate contacts the fixed base of the circular shear. The left side of the clearance elimination inclined wedge is a slope, which cooperates with the slope on the moving base of the circular shear.

[0011] Furthermore, the disc spring central shaft is a stepped shaft, and the lower end face of the disc spring group abuts against the stepped surface of the disc spring central shaft.

[0012] Compared with the prior art, the present utility model has the following advantages:

[0013] 1. When the gap becomes larger after the wear of the existing equipment and the guiding performance of the sliding table becomes poor, the right disc spring inclined wedge active clearance elimination mechanism can use the pre-tightening method of the disc spring group to continuously compensate for the gap between the moving base of the circular shear and the fixed base of the circular shear, control the sliding accuracy, and reliably ensure the guiding performance of the sliding table.

[0014] 2. The left passive clearance elimination mechanism uses the inclined surface contact between the trapezoidal wedge block and the copper slide plate to decompose the horizontal force transmitted on the right side of the trapezoidal wedge block into horizontal and vertical forces, making the gap between the moving base of the circular shear and the fixed base of the circular shear smaller and the sliding accuracy higher.

[0015] 3. All components can be made domestically, which is convenient for daily maintenance and equipment repair, and greatly reduces the equipment maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a structural schematic diagram of the present utility model.

[0017] Figure 2 is Figure 1 the structural schematic diagram of the left wedge block passive clearance elimination mechanism in

[0018] Figure 3 is Figure 1 the structural schematic diagram of the right disc spring inclined wedge active clearance elimination mechanism in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] As Figure 1 、 Figure 2 、Figure 3 As shown in the figure, the clearance elimination mechanism of this hot-rolled circular shear is mainly composed of a passive clearance elimination mechanism 3 with a left wedge block and an active clearance elimination mechanism 4 with a right disc spring and an inclined wedge. The passive clearance elimination mechanism 3 with a left wedge block and the active clearance elimination mechanism 4 with a right disc spring and an inclined wedge are both installed on the moving base 2 of the circular shear. The moving base 2 of the circular shear is slidably connected to the fixed base 1 of the circular shear.

[0020] The passive clearance elimination mechanism 3 with a left wedge block is mainly composed of a copper slide plate 5, a trapezoidal wedge block 8, a fixing screw 6, and a locking nut 7. The fixing screw 6 passes through the middle pin hole of the trapezoidal wedge block 8 to install the trapezoidal wedge block 8 on the moving base 2 of the circular shear. The trapezoidal wedge block 8 is locked by the locking nut 7 below the fixing screw 6. A copper slide plate 5 is installed on each of the left and right sides of the trapezoidal wedge block 8 for the moving base 2 of the circular shear to slide on the fixed base 1 of the circular shear.

[0021] The active clearance elimination mechanism 4 with a right disc spring and an inclined wedge is composed of a copper slide plate 9, a clearance elimination inclined wedge 10, a disc spring outer sleeve 11, a disc spring central shaft 12, a disc spring pressing block 13, a disc spring group 14, and a disc spring pre-tightening nut 15. The disc spring outer sleeve 11 is installed on the moving base 2 of the circular shear. There is a threaded hole above the disc spring outer sleeve 11. The disc spring pre-tightening nut 15 is an external threaded nut and is installed in the threaded hole of the disc spring outer sleeve 11. The disc spring pressing block 13 installed inside the disc spring outer sleeve 11 abuts against the upper end face of the disc spring group 14. The disc spring pre-tightening nut 15 provides a pre-tightening force for the disc spring group 14 through the disc spring pressing block 13. The disc spring group 14 is installed on the disc spring central shaft 12 to transfer the pre-tightening force of the disc spring group 14 to the disc spring central shaft 12. The output end face of the disc spring central shaft 12 closely abuts against the clearance elimination inclined wedge 10. The disc spring central shaft 12 is a stepped shaft. The lower end face of the disc spring group 14 abuts against the stepped surface of the disc spring central shaft 12. A copper slide plate 9 is installed on the right side of the clearance elimination inclined wedge 10. During the movement of the moving base 2 of the circular shear, the copper slide plate 9 contacts the fixed base 1 of the circular shear. The left side of the clearance elimination inclined wedge 10 is an inclined surface, which cooperates with the inclined surface on the moving base 2 of the circular shear to achieve the function of clearance elimination.

[0022] During the working process, when the side surfaces of the moving base 2 of the hot-rolling circular shear and the fixed base 1 of the circular shear are worn, the gap between the moving base 2 of the circular shear and the fixed base 1 of the circular shear becomes larger, making it difficult to adjust the width of the circular shear, and the width changes during the shearing process. When the guiding performance of the circular shear slide table deteriorates, the right-side disc spring inclined wedge active clearance elimination mechanism 4 can continuously compensate for the gap between the moving base 2 of the circular shear and the fixed base 1 of the circular shear by using the pre-tightening method of the disc spring group 14. At the same time, the left-side passive clearance elimination mechanism 3 uses the inclined surface contact between the trapezoidal wedge block 8 and the copper slide plate 5 to decompose the horizontal force transmitted on the right side of the trapezoidal wedge block 8 into horizontal and vertical forces, making the gap between the moving base 2 of the circular shear and the fixed base 1 of the circular shear smaller and the sliding accuracy higher, thereby controlling the sliding accuracy of the moving base 2 of the circular shear on the fixed base 1 of the circular shear and reliably ensuring the guiding performance of the circular shear slide table.

Claims

1. A backlash elimination mechanism for hot rolling disc shears, characterized in that: The backlash elimination mechanism of the hot-rolled circular shear comprises a left-side wedge block passive backlash elimination mechanism (3) and a right-side disc spring inclined wedge active backlash elimination mechanism (4), wherein the left-side wedge block passive backlash elimination mechanism (3) and the right-side disc spring inclined wedge active backlash elimination mechanism (4) are both mounted on a circular shear movable base (2), and the circular shear movable base (2) is slidably connected to a circular shear fixed base (1).

2. The backlash eliminating mechanism for hot rolling disc shears according to claim 1, characterized in that: The left-side wedge passive backlash elimination mechanism (3) is composed of a copper slide plate (5), a trapezoidal wedge block (8), a fixed screw rod (6), and a locking nut (7); the fixed screw rod (6) passes through the middle pin hole of the trapezoidal wedge block (8) to mount the trapezoidal wedge block (8) on the circular shear movable base (2); the trapezoidal wedge block (8) is locked by the locking nut (7) below the fixed screw rod (6); and a copper slide plate (5) is respectively mounted on the left and right sides of the trapezoidal wedge block (8) for the circular shear movable base (2) to slide on the circular shear fixed base (1).

3. The backlash eliminating mechanism for hot rolling disc shears according to claim 1, characterized in that: The right disc spring wedge active backlash elimination mechanism (4) comprises a copper slide plate (9), a backlash elimination wedge (10), a disc spring outer sleeve (11), a disc spring center shaft (12), a disc spring pressure block (13), a disc spring group (14), and a disc spring pre-tightening nut (15); the disc spring outer sleeve (11) is mounted on the disc shear movable base (2), the upper part of the disc spring outer sleeve (11) is a threaded hole, the disc spring pre-tightening nut (15) is an externally threaded nut, which is mounted in the threaded hole of the disc spring outer sleeve (11), and the disc spring pressure block (13) installed inside the disc spring outer sleeve (11) abuts against the upper end surface of the disc spring group (14). The disc spring preload nut (15) provides a preload force for the disc spring group (14) through the disc spring pressure block (13). The disc spring group (14) is mounted on the disc spring center shaft (12) to transfer the preload force of the disc spring group (14) to the disc spring center shaft (12). The output end surface of the disc spring center shaft (12) is in close contact with the anti-backlash wedge (10). A copper slide plate (9) is mounted on the right side of the anti-backlash wedge (10). During the movement of the disc shear movable base (2), the copper slide plate (9) contacts the disc shear fixed base (1). The left side of the anti-backlash wedge (10) is an inclined surface, which cooperates with the inclined surface on the disc shear movable base (2).

4. The backlash eliminating mechanism for hot rolling disc shears according to claim 3, characterized in that: The disc spring center axis (12) is a stepped axis, and the lower end surface of the disc spring assembly (14) is pressed against the stepped surface of the disc spring center axis (12).

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