Bend-bending-preventing guide groove device of bar double-length shear

Abstract

The utility model discloses a bar double-length shear bend prevention guide groove device which comprises supporting legs, a guide groove height auxiliary adjusting mechanism, a guide groove bottom plate and guide groove side plates, the guide groove side plates are fixedly arranged on the two sides of the guide groove bottom plate, and a bar moving channel is formed by the guide groove bottom plate and the guide groove side plates on the two sides. A concave roller perpendicular to a guide groove side plate is arranged in the bar moving channel, the supporting leg comprises a supporting leg outer sleeve and a supporting leg inner supporting cylinder, the supporting leg outer sleeve is movably connected outside the supporting leg inner supporting cylinder in a sleeving mode, and a guide groove height auxiliary adjusting mechanism is arranged below the guide groove. The height of the guide groove device is adjustable, so that the center line of a bar is consistent with the shearing center line, the concave surface roller and the groove lining plate form a smooth surface with two high sides and a low middle part, the bar always moves parallel to the guide groove side plate, and the bending phenomenon caused by inconsistent center lines and collision with a shearing arm is avoided; abrasion of the bars to the guide groove bottom plate is reduced, and the surface quality of the bars is not affected.

Description

Technical Field

[0001] The utility model relates to the technical field of bar mill multiple-length shears, and particularly relates to a device for preventing bar bends in a bar multiple-length shear guide groove. Background Art

[0002] With the development of the steel industry and the increasing demand for various steel products in society, rolling mills are changing rolling specifications and parameters more and more frequently. However, restricted by the production process, each change in rolling specifications or parameters requires adjustments to the production line, especially the situation of the front and rear guide grooves of the multiple-length shear. The existing front and rear guide grooves of the multiple-length shear have the following problems in use: First, the height of the front and rear guide grooves of the multiple-length shear is fixed and cannot be adjusted according to the change in the size of the bar rolling production specifications, resulting in the "center line" of the bar being inconsistent with the shearing "center line", so that the bar is prone to bending during shearing. In order to meet the quality requirements of bar products, only the bent part can be sheared off, which affects the yield of the product. Second, the guide groove bottom plate is just a plate. When the bar moves in the guide groove, the bar and the guide groove bottom plate generate sliding friction, which not only causes serious wear of the guide groove bottom plate, but also easily causes wear on the surface of the bar, affecting the quality of the bar product. Third, the guide groove bottom plate is flat and the width of the guide groove is greater than the diameter of the bar. When the bar moves in the guide groove, due to the following of the bar behind, the bar tilts in the guide groove and is prone to hitting the shear arm when reaching the multiple-length shear, resulting in the bar bending phenomenon and affecting the yield of the bar product. Therefore, it is objectively necessary to develop a device for preventing bar bends in a bar multiple-length shear guide groove with adjustable guide groove height, small wear between the bar and the guide groove bottom plate, and high yield. Summary of the Utility Model

[0003] In order to solve the problems that the bar is prone to bending during shearing and the bar and the guide groove bottom plate are subject to sliding wear in the prior art, the utility model provides a device for preventing bar bends in a bar multiple-length shear guide groove. The height of the guide groove device is adjustable, so that the center line of the bar is consistent with the shearing center line. The concave rollers and the groove lining plate form a smooth surface with high sides and low middle, so that the bar always moves parallel to the guide groove side plate and will not hit the shear arm, eliminating the bending phenomenon caused by inconsistent center lines and hitting the shear arm. The setting of the concave rollers makes the bar move in the guide groove by rolling, which not only reduces the wear of the bar on the guide groove bottom plate, but also does not affect the surface quality of the bar.

[0004] To solve the above problems, the present utility model adopts the following technical solution: A device for preventing the bending of the end of a multiple-length bar shear, comprising support legs, a guide groove height auxiliary adjustment mechanism, a guide groove bottom plate, and guide groove side plates. The guide groove side plates are fixedly arranged on both sides of the guide groove bottom plate. The guide groove bottom plate and the guide groove side plates on both sides form a bar moving channel. A concave roller perpendicular to the guide groove side plate is arranged in the bar moving channel. Both ends of the concave roller are concave roller shafts, and the concave roller and the concave roller shaft are integrally formed. Bearings are arranged on the guide groove side plates, and the bearings are in interference fit with the concave roller shafts;

[0005] The support legs include a support leg outer sleeve, a support leg inner sleeve, and through holes. The support leg outer sleeve is movably sleeved outside the support leg inner sleeve. The top of the support leg outer sleeve is fixedly connected to the guide groove bottom plate. The bottom of the support leg inner sleeve is fixedly installed on the ground. Through holes are provided on the support leg outer sleeve and the support leg inner sleeve;

[0006] The guide groove height auxiliary adjustment mechanism includes a threaded rod, a movable sleeve block, an inner branch pipe, an outer sleeve pipe, a driven gear, a driving gear, and an adjustment handle. The inner branch pipe is movably sleeved inside the outer sleeve pipe. The top of the inner branch pipe is fixedly connected to the guide groove bottom plate. The bottom of the outer sleeve pipe is fixedly installed on the ground. The threaded rod is arranged parallel to the inner branch pipe in the inner cavity of the inner branch pipe. A driven gear is fixedly installed at the bottom of the threaded rod. The driving gear is installed on the outer sleeve pipe. The driving gear is connected with an adjustment handle. The driven gear is meshed with the driving gear. The movable sleeve block is movably sleeved on the threaded rod, and the movable sleeve block is fixedly connected to the inner branch pipe.

[0007] Further, the concave roller is a cylindrical structure with thick ends and a thin middle near the guide groove bottom plate. A groove lining plate is arranged in the bar moving channel formed by the guide groove bottom plate and the guide groove side plates. The groove lining plate is "U"-shaped. The raised plates on both sides of the groove lining plate are fixedly installed on the guide groove side plates through fastening bolts. The upper surface of the bottom plate of the groove lining plate fits with the upper surface of the concave roller to form a flat plane.

[0008] Further, the outer surface of the concave roller is a curved surface or a flat surface.

[0009] Further, there is at least 1 concave roller.

[0010] Further, the through holes penetrate through the support leg outer sleeve and the support leg inner sleeve, and the axes of the through holes are parallel to the horizontal plane. There is 1 through hole on the support leg inner sleeve, and at least 2 through holes are provided on the support leg outer sleeve.

[0011] Further, 11 through-holes are provided on the outer sleeve of the support leg to ensure that the center lines of bars with diameters of 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 25mm, 28mm, 32mm, 36mm, and 40mm coincide with the shearing center line. Corresponding diameter markings are labeled beside each through-hole.

[0012] Further, a scale is engraved on the outer surface of the inner branch pipe.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows: For the bar multiple-length shearing anti-bending guide groove device of the present technical solution, the height of the guide groove device is adjustable, enabling the center line of the bar to coincide with the shearing center line. Moreover, the concave rollers and the groove lining plate form a smooth surface that is high on both sides and low in the middle, allowing the bar to always move parallel to the guide groove side plate without hitting the shear arm, thus preventing the occurrence of bending phenomena caused by inconsistent center lines or hitting the shear arm, and ensuring the yield rate of bar products; the setting of the concave rollers enables the bar to move in a rolling manner within the guide groove, which not only reduces the wear of the bar on the guide groove bottom plate but also does not affect the surface quality of the bar, reduces the production cost generated by replacing the guide groove bottom plate, and ensures the quality of bar products. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0015] Figure 2 is a top view of the present utility model;

[0016] Figure 3 is a schematic diagram of the structure of the support leg 1 of the present utility model;

[0017] In the figure: 1 - support leg, 2 - guide groove bottom plate, 3 - guide groove side plate, 4 - groove lining plate, 5 - fastening bolt, 6 - bearing, 7 - concave roller shaft, 8 - concave roller, 9 - threaded rod, 10 - movable sleeve block, 11 - inner branch pipe, 12 - outer sleeve pipe, 13 - driven gear, 14 - driving gear, 15 - adjusting handle, 16 - positioning bolt, 17 - through-hole, 18 - outer sleeve of support leg, 19 - inner support cylinder of support leg. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The present utility model will be further described below with reference to the accompanying drawings, but it shall not be limited in any way. Any changes or improvements made based on the teachings of the present utility model fall within the protection scope of the present utility model.

[0019] As Figures 1 to 3As shown in the figure, the utility model includes support legs 1, a guide groove height auxiliary adjustment mechanism, a guide groove bottom plate 2, and guide groove side plates 3. On both sides of the guide groove bottom plate 2, the guide groove side plates 3 are fixedly arranged. The guide groove bottom plate 2 and the guide groove side plates 3 on both sides form a bar moving channel. In the bar moving channel, a concave roller 8 perpendicular to the guide groove side plates 3 is arranged. Both ends of the concave roller 8 are concave roller shafts 7. The concave roller 8 and the concave roller shaft 7 are integrally formed. A bearing 6 is arranged on the guide groove side plate 3. The bearing 6 is in interference fit with the concave roller shaft 7. When the bar moves in the bar moving channel formed by the guide groove bottom plate 2 and the guide groove side plates 3, the concave roller 8 rolls. The relative movement between the bar and the guide groove is rolling friction, which reduces the friction coefficient between the bar and the guide groove. This not only makes the bar move faster but also reduces the friction loss between the bar and the guide groove.

[0020] The support leg 1 includes a support leg outer sleeve 18, a support leg inner sleeve 19, and a through hole 17. The support leg outer sleeve 18 is movably sleeved outside the support leg inner sleeve 19. The support leg outer sleeve 18 and the support leg inner sleeve 19 partially overlap. The top of the support leg outer sleeve 18 is fixedly connected to the guide groove bottom plate 2. The bottom of the support leg inner sleeve 19 is fixedly installed on the ground. The support leg outer sleeve 18 sleeved outside the support leg inner sleeve 19 can move up and down relative to the ground. Through holes 17 are provided on the support leg outer sleeve 18 and the support leg inner sleeve 19.

[0021] The guide groove height auxiliary adjustment mechanism includes a threaded rod 9, a movable sleeve block 10, an inner branch pipe 11, an outer sleeve pipe 12, a driven gear 13, a driving gear 14, and an adjustment handle 15. The inner branch pipe 11 is movably sleeved inside the outer sleeve pipe 12. The inner branch pipe 11 and the outer sleeve pipe 12 partially overlap. The top of the inner branch pipe 11 is fixedly connected to the guide groove bottom plate 2. The bottom of the outer sleeve pipe 12 is fixedly installed on the ground. The inner branch pipe 11 inserted inside the outer sleeve pipe 12 can move up and down relative to the ground. The threaded rod 9 is arranged parallel to the inner branch pipe 11 in the inner cavity of the inner branch pipe 11. A driven gear 13 is fixedly installed at the bottom of the threaded rod 9. The driving gear 14 is installed on the outer sleeve pipe 12. The driving gear 14 is connected to the adjustment handle 15. The driven gear 13 meshes with the driving gear 14. The movable sleeve block 10 is movably sleeved on the threaded rod 9. The movable sleeve block 10 is fixedly connected to the inner branch pipe 11. When it is necessary to adjust the height of the guide groove, the adjustment handle 15 is rotated. The driving gear 14 connected to the adjustment handle 15 and the driven gear 13 meshing with the driving gear 14 also rotate accordingly. The rotation of the driven gear 13 drives the threaded rod 9 to rotate. The movable sleeve block 10 sleeved on the threaded rod 9 moves up and down. The movable sleeve block 10 is fixedly connected to the inner branch pipe 11. The inner branch pipe 11 moves up and down inside the inner branch pipe 11 along with the movable sleeve block 10, thereby realizing the auxiliary adjustment of the guide groove height.

[0022] The concave roller 8 is a cylindrical structure that is thick at both ends and thin in the middle near the bottom plate 2 of the guide groove. A groove lining plate 4 is arranged in the bar moving channel formed by the bottom plate 2 of the guide groove and the side plate 3 of the guide groove. The groove lining plate 4 is in a "U" shape. The raised plates on both sides of the groove lining plate 4 are fixedly installed on the side plate 3 of the guide groove through bolts 5. The two plates raised on the side of the groove lining plate 4 are parallel to the side plate 3 of the guide groove. The two side plates and the bottom plate of the groove lining plate 4 are integrally formed. The two side plates and the bottom plate of the groove lining plate 4 form a "U" shape. The groove lining plate 4 is installed in the bar moving channel formed by the bottom plate 2 of the guide groove and the side plate 3 of the guide groove. The upper surface of the bottom plate of the groove lining plate 4 fits with the upper surface of the concave roller 8 to form a flat plane. There are grooves on the bottom plate of the groove lining plate 4 that are consistent with the outer surface shape of the concave roller 8. The groove lining plate 4 and the concave roller 8 are installed in the guide groove. Looking down from directly above the guide groove, the concave roller 8 is embedded in the groove of the groove lining plate 4. The concave roller 8 is a cylindrical body that is thick at both ends and thin in the middle. The groove lining plate 4 is in a "U" shape. The plane formed by the upper surface of the groove lining plate 4 and the upper surface of the concave roller 8 is a smooth arc surface that is high on both sides and low in the middle. When the bar moves in the guide groove, due to the self-weight of the bar, it is always in the middle position of the guide groove, and the bar always remains parallel to the side plate 3 of the guide groove.

[0023] The outer surface of the concave roller 8 is a curved surface or a flat surface. When the outer surface of the concave roller 8 is a curved surface, the plane formed by the upper surface of the concave roller 8 and the upper surface of the groove lining plate 4 is a smooth arc surface that is high on both sides and low in the middle. When the outer surface of the concave roller 8 is a flat surface, the plane formed by the upper surface of the concave roller 8 and the upper surface of the groove lining plate 4 is a "V" character surface that is high on both sides and low in the middle.

[0024] One or more concave rollers 8 are provided. The multiple concave rollers 8 are arranged parallel to the bottom plate 2 of the guide groove. The arrangement of the concave rollers 8 not only ensures that the bar is always parallel to the side plate 3 of the guide groove when moving in the guide groove, but also changes the sliding friction of the bar moving in the guide groove to rolling friction.

[0025] The through hole 17 penetrates through the support leg outer sleeve 18 and the support leg inner sleeve 19, and the axis of the through hole 17 is parallel to the horizontal plane. One through hole 17 is provided on the support leg inner sleeve 19, and eleven through holes 17 are provided on the support leg outer sleeve 18 to ensure that the center lines of bars with diameters of 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 25mm, 28mm, 32mm, 36mm, and 40mm are consistent with the shearing center line. Each through hole is marked with a corresponding diameter mark. When the rolling production specification size of the bar changes, under the adjustment of the guide groove height auxiliary adjustment mechanism, the support leg outer sleeve 18 moves up and down. When the through hole 17 on the support leg outer sleeve 18 corresponding to the diameter of the bar to be rolled coincides with the through hole 17 on the support leg inner sleeve 19, a positioning bolt 16 is inserted into the through hole 17 for positioning.

[0026] A scale is engraved on the outer surface of the inner branch pipe 11, and scale lines corresponding to bar diameters of 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 25mm, 28mm, 32mm, 36mm, and 40mm are marked on the scale.

[0027] When the diameter of the rolled bar changes from 16mm to 32mm, first, the height of the guide groove needs to be adjusted. Unscrew the nut on the positioning bolt 16, pull out the positioning bolt 16, and rotate the adjusting handle 15. The driving gear 14 connected to the adjusting handle 15 and the driven gear 13 meshing with the driving gear 14 will also rotate accordingly. The rotation of the driven gear 13 drives the threaded rod 9 to rotate, and the movable sleeve block 10 sleeved on the threaded rod 9 moves upward. The movable sleeve block 10 is fixedly connected to the inner branch pipe 11, and the inner branch pipe 11 moves upward in the outer sleeve 12 along with the movable sleeve block 10. A scale line corresponding to the bar diameter is engraved on the outer surface of the inner branch pipe 11. When the top edge of the outer sleeve 12 coincides with the scale line marked with 32mm, hold the adjusting handle 15 steady. The through hole 17 marked with 32mm on the support leg outer sleeve 18 just coincides with the through hole 17 on the support leg inner branch cylinder 19. Insert the positioning bolt 16 into the through hole 17, and then screw on the nut to complete the adjustment of the guide groove height. When rolling bars with other diameters, the guide groove height is adjusted in the same way. When the bar with a diameter of 32mm enters the guide groove with the adjusted height, it contacts the smooth surface with higher sides and lower middle formed by the concave rollers 8 and the groove lining plate 4. Due to its own gravity, the bar is always in the middle position of the guide groove and always moves forward parallel to the guide groove side plate 3. When it reaches the multiple-length shear, the center line of the bar just coincides with the shear center line of the multiple-length shear.

Claims

1. A bar multiple-length shear anti-bending guide groove device, characterized in that: It includes support legs (1), a guide groove height auxiliary adjustment mechanism, a guide groove bottom plate (2) and guide groove side plates (3). The two sides of the guide groove bottom plate (2) are fixedly provided with guide groove side plates (3). The guide groove bottom plate (2) and the guide groove side plates (3) on both sides form a bar moving channel. In the bar moving channel, there is a concave roller (8) perpendicular to the guide groove side plate (3). Both ends of the concave roller (8) are concave roller shafts (7). The concave roller (8) and the concave roller shaft (7) are integrally formed. A bearing (6) is provided on the guide groove side plate (3), and the bearing (6) is in interference fit with the concave roller shaft (7). The support leg (1) includes a support leg outer sleeve (18), a support leg inner sleeve (19) and a through hole (17). The support leg outer sleeve (18) is movably sleeved outside the support leg inner sleeve (19). The top of the support leg outer sleeve (18) is fixedly connected to the guide groove bottom plate (2). The bottom of the support leg inner sleeve (19) is fixedly installed on the ground. Through holes (17) are provided on the support leg outer sleeve (18) and the support leg inner sleeve (19). The guide groove height auxiliary adjustment mechanism includes a threaded rod (9), a movable sleeve block (10), an inner branch pipe (11), an outer sleeve pipe (12), a driven gear (13), a driving gear (14) and an adjustment handle (15). The inner branch pipe (11) is movably sleeved inside the outer sleeve pipe (12). The top of the inner branch pipe (11) is fixedly connected to the guide groove bottom plate (2). The bottom of the outer sleeve pipe (12) is fixedly installed on the ground. The threaded rod (9) is arranged parallel to the inner branch pipe (11) in the inner cavity of the inner branch pipe (11). A driven gear (13) is fixedly installed at the bottom of the threaded rod (9). The driving gear (14) is installed on the outer sleeve pipe (12). The driving gear (14) is connected with an adjustment handle (15). The driven gear (13) meshes with the driving gear (14). The movable sleeve block (10) is movably sleeved on the threaded rod (9), and the movable sleeve block (10) is fixedly connected to the inner branch pipe (11).

2. The bar multiple-length shearing anti-bending guide groove device according to claim 1, wherein: The concave roller (8) is a columnar structure with thick ends and thin middle near the guide groove bottom plate (2). A groove lining plate (4) is arranged in the bar moving channel formed by the guide groove bottom plate (2) and the guide groove side plates (3). The groove lining plate (4) is "U"-shaped. The raised plates on both sides of the groove lining plate (4) are fixedly installed on the guide groove side plates (3) through fastening bolts (5). The upper surface of the bottom plate of the groove lining plate (4) fits with the upper surface of the concave roller (8) to form a flat plane.

3. The bar multiple-length shear anti-bending guide groove device according to claim 2, characterized in that: The outer surface of the concave roller (8) is a curved surface or a flat surface.

4. The device for preventing elbow of the multiple-length shearing guide groove for bars according to claim 1, wherein: There is at least 1 concave roller (8).

5. The bar multiple-length shearing anti-bending guide groove device according to claim 1, wherein: The through hole (17) penetrates through the support leg outer sleeve (18) and the support leg inner sleeve (19), and the axis of the through hole (17) is parallel to the horizontal plane. There is 1 through hole (17) on the support leg inner sleeve (19), and at least 2 through holes (17) are provided on the support leg outer sleeve (18).

6. The bar multiple-length shearing anti-bending guide groove device according to claim 5, characterized in that: Eleven through holes (17) are provided in the outer sleeve (18) of the support leg to ensure that the center lines of bars with diameters of 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 25mm, 28mm, 32mm, 36mm, and 40mm coincide with the shearing center line, and corresponding diameter markings are labeled beside each through hole.

7. The device for preventing elbow of bar multiple-length shearing according to claim 1, characterized in that: A scale is engraved on the outer surface of the inner branch pipe (11).

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