A universal rolling mill guide locking mechanism

Abstract

This invention relates to a universal rolling mill guide locking mechanism, belonging to the technical field of steel rail production equipment in the metallurgical industry. The technical solution is as follows: A push rod (6) is respectively provided at one end of two eccentric shafts (3) to cooperate with a copper sleeve (4). The push rod (6) is threadedly connected to a locking nut (5), which is fixed to the guide box (2). The locking nut (5) and the push rod (6) constitute a guide X-direction locking mechanism. A locking plate (7) is provided between the guide (1) and the guide box (2), forming a wedge-shaped structure between the locking plate (7) and the guide (1). A locking rod (8) threadedly connected to the locking plate (7) is provided between the locking plate (7) and the guide box (2). The locking plate (7) and the locking rod (8) constitute a guide YZ-direction locking mechanism. The beneficial effects of this invention are: it can prevent the guide from shaking in the guide box and extend the service life of the copper sleeve and eccentric shaft.

Description

Technical Field

[0001] This invention relates to a universal rolling mill guide locking mechanism, belonging to the technical field of steel rail production equipment in the metallurgical industry. Background Technology

[0002] The guide of a universal rolling mill is one of the most important components, comprising the guide, guide box, eccentric shaft, and sleeve. Following the rolling direction, the guide and guide box are connected by two eccentric shafts, one at each end. Copper sleeves are installed between the two eccentric shafts and the guide box, serving as bearings for the guide's rotation. One end of each eccentric shaft has a wrench chuck, hexagonal or square in shape, for rotating the eccentric shaft. This method of guide installation in universal rolling mills presents the following problems:

[0003] (1) The guide and the guide box are limited by a copper sleeve. The copper sleeve clamps the two sides of the guide installation position and maintains a gap of ≤0.5mm. This allows the guide to be adjusted by the eccentric shaft and maintains a small wobbling. However, in actual use, the wear and deformation of the copper sleeve will increase the fit clearance. After the clearance increases, the wobbling of the working surface on the guide is much greater than the clearance, which causes the rolled piece to be unable to be properly guided into the die and produces problems such as rolling scars and steel accumulation.

[0004] (2) It is difficult to replace the copper bushing after it is worn out. Replacing the steel bushing requires removing the guide, eccentric shaft, etc. before a new copper bushing can be installed.

[0005] (3) When dealing with gaps, the open gasket is usually inserted directly. However, the gasket is easy to fall off and can easily damage the copper bushing.

[0006] (4) There is also a problem with the fit between the eccentric shaft and the guide: after wear, the guide tip will wobble more, which is not conducive to guide control. Summary of the Invention

[0007] The purpose of this invention is to provide a universal rolling mill guide locking mechanism that can prevent the guide from shaking in the guide box, extend the service life of the copper sleeve and eccentric shaft, and solve the problems existing in the background art.

[0008] The technical solution of this invention is:

[0009] A universal rolling mill guide locking mechanism includes a guide, a guide box, eccentric shafts, and sleeves. The guide and guide box are connected in the rolling direction by two eccentric shafts, one at each end and one at the guide box, with a copper sleeve. One end of each eccentric shaft has a wrench chuck, and the other end of each shaft has a push rod that engages with the copper sleeve. The push rod is threaded onto a locking nut, which is fixed to the guide box. The locking nut and push rod constitute a guide locking mechanism in the X direction. A locking plate is placed between the guide and guide box, forming a wedge-shaped structure. A locking rod is threaded onto the locking plate, and the locking plate and locking rod constitute a guide locking mechanism in the YZ direction.

[0010] The guide X-direction locking mechanism has a central hole in the push rod. The diameter of the central hole in the push rod is larger than the diameter of the end of the eccentric shaft, but smaller than the diameter of the copper sleeve.

[0011] The center hole of the push rod in the X-direction locking mechanism of the guide is an internal hexagonal hole.

[0012] In the YZ direction locking mechanism of the guide, a wedge-shaped structure is formed between the locking plate and the guide and is set between two eccentric shafts. The angle of the wedge structure is 20 to 50 degrees.

[0013] In the YZ direction locking mechanism of the guide, the locking rod that is threadedly connected to the locking plate and the guide box rests on the live pin. The live pin is set in the live pin groove, and the live pin groove is set on the guide box.

[0014] The beneficial effects of this invention are: by using the X-direction locking mechanism and the YZ-direction locking mechanism to prevent the guide from shaking in the guide box, the rolled workpiece can be properly guided into the die, and the service life of the copper sleeve and the eccentric shaft is extended. Attached Figure Description

[0015] Figure 1 This is an assembly diagram of the present invention;

[0016] Figure 2 This is an exploded view of the present invention;

[0017] Figure 3 This is a cross-sectional view of the eccentric shaft of the present invention;

[0018] Figure 4 This is a detailed view of the eccentric shaft of the present invention;

[0019] Figure 5 for Figure 4 A magnified view of a portion of point C;

[0020] Figure 6 Schematic diagram of the locking mechanism in the YZ direction of the guide;

[0021] In the diagram: 1. Guide rail, 2. Guide rail box, 3. Eccentric shaft, 4. Copper sleeve, 5. Locking nut, 6. Top rod, 7. Locking plate, 8. Locking rod, 9. Live pin, 10. Live pin groove;

[0022] The dimensions of the locking nut recess depth are S1, the inner diameter of the copper sleeve is K, the thread diameter is M, the thickness of the hexagonal push rod boss is S4, the diameter of the hexagonal push rod boss is K-2*S5, and the diameter of the locking nut recess is K+2*S6.

[0023] The following parameters are specified: Z-axis movement of the locking plate (S7), center distance of the eccentric shaft (S8), eccentricity (S9), Y-axis clearance between the locking plate and the guide (S10), wedge structure slope (S13), locking plate thickness (S14), live pin thickness (S15), and live pin groove depth (S16). Detailed Implementation

[0024] The invention will be further described below with reference to the accompanying drawings and examples.

[0025] See attached document Figure 1-6 A universal rolling mill guide locking mechanism includes a guide 1, a guide box 2, an eccentric shaft 3, and a sleeve 4. The guide 1 and the guide box 2 are connected by two eccentric shafts 3 in the rolling direction. Copper sleeves 4 are provided between the two ends of the two eccentric shafts 3 and the guide box 2. A wrench head is provided at one end of the two eccentric shafts 3. A push rod 6 that cooperates with the copper sleeve 4 is provided at the other end of the two eccentric shafts 3. The push rod 6 is threaded to a locking nut 5. The locking nut 5 is fixed on the guide box 2. The locking nut 5 and the push rod 6 constitute a guide X-direction locking mechanism.

[0026] A locking plate 7 is provided between the guide 1 and the guide box 2. The locking plate 7 and the guide 1 form a wedge structure. A locking rod 8 is provided between the locking plate 7 and the guide box 2 and is threadedly connected to the locking plate 7. The locking plate 7 and the locking rod 8 constitute the guide YZ direction locking mechanism.

[0027] In this embodiment, refer to the appendix Figure 1 , 2 Four copper sleeves 4 are installed in four mounting holes on both sides of the guide box 2. Two eccentric shafts 3 pass through the copper sleeves 4 and the corresponding mounting holes of the guide 1 to form a connection. One end of the two eccentric shafts 3 is provided with a wrench head, which is hexagonal or square, for rotating the eccentric shaft.

[0028] The X-direction locking mechanism of the guide is installed on the end face of the eccentric shaft hole of the guide box 2, and the position of the copper sleeve 4 in the X direction is changed by the rotation of the push rod 6.

[0029] The YZ direction locking mechanism of the guide is installed between the bottom of the guide 1 and the guide box 2. Through the wedge structure between the locking rod 8, the locking plate 7 and the guide 1, the gap between the guide 1 and the guide box 2 is tightened, reducing the shaking of the guide in the YZ direction.

[0030] See attached document Figure 3 , 4 5. The X-direction locking mechanism of the guide consists of a locking nut 5 and a push rod 6. The locking nut 5 is welded concentrically to one end of the eccentric shaft hole of the guide box 2. The push rod 6, through the thread of the locking nut 5, can position the copper sleeve 4 in the X direction. The design dimension method is as follows:

[0031] (1) Since the eccentric hole of the copper sleeve 4 and the guide box 2 is an interference fit, the movement in the X direction requires a special tool to impact it. Therefore, the inner diameter M of the thread of the locking nut 5 is more than 4mm larger than the diameter K of the copper sleeve hole, so that the tool can be inserted and the thread is not damaged.

[0032] (2) Ensure that the push rod 6 can effectively support the copper sleeve 4. The copper sleeve end of the push rod 6 is designed with a small diameter platform, S5≥2mm (concentricity accuracy), S4=5~15mm (push-in amount).

[0033] (3) The internal hexagonal hole of the push rod 6 is designed to be 1-3mm larger than the hexagonal size of the standard nut, so as to facilitate the manufacture of a hexagonal wrench with the corresponding standard screw. The inner circle diameter of the internal hexagon is 1-3mm larger than the size of the eccentric shaft 3 to prevent the eccentric shaft from protruding from the end face and damaging the mechanism;

[0034] (4) The thickness of the locking nut 5 is designed to be 25-50mm to prevent the thickness from taking up space and causing installation interference;

[0035] See attached document Figure 6 The guide's YZ direction locking mechanism consists of a recessed structure of the guide 1, a locking plate 7, and a locking rod 8. The design method is as follows:

[0036] On the bottom surface of the guide 1, a concave structure with an inclined surface is machined between the two eccentric holes S8. S13 is the clamping surface angle, ranging from 20 to 50 degrees, and the force-bearing area of ​​the working surface is kept in the middle range of the two eccentric holes.

[0037] The inclined surface of the locking plate 7 forms a wedge-shaped structure with the bottom surface of the guide 1. The locking plate 7 is placed below the guide in the frame groove of the guide box 2. The movable pin 9 is placed in the movable pin groove 10. The locking rod 8 is screwed to the locking plate 7 and presses against the movable pin 9.

[0038] The eccentricity of the eccentric shaft is S9. When the eccentric shaft is at its highest position, S10 = 2 * S9 + (2 ~ 10 mm). The minimum Z-direction displacement of the locking plate 7 is S7 = 2 * S9 * ctgS13, S15 ≥ S7 / 2, and S16 = S10 + (20 ~ 50 mm).

Claims

1. A universal rolling mill guide locking mechanism, comprising a guide (1), a guide box (2), an eccentric shaft (3), and a copper sleeve (4), wherein the guide (1) and the guide box (2) are connected by two eccentric shafts (3) in the rolling direction, and copper sleeves (4) are provided between the two ends of the two eccentric shafts (3) and the guide box (2), and the guide (1) and the guide box (2) are limited by the copper sleeves (4), the copper sleeves (4) clamp the two sides of the guide (1) mounting position and maintain a gap of ≤0.5mm, so that the guide (1) can be adjusted by the eccentric shafts (3) and can maintain a small wobbling, and one end of the two eccentric shafts (3) is provided with a wrench head, characterized in that: At the other end of each of the two eccentric shafts (3), a push rod (6) is provided to cooperate with the copper sleeve (4). The push rod (6) has a central hole. The diameter of the central hole of the push rod (6) is larger than the diameter of the end of the eccentric shaft (3) and smaller than the diameter of the copper sleeve (4). The push rod (6) is threaded to the locking nut (5). The locking nut (5) is fixed on the guide box (2). The locking nut (5) and the push rod (6) constitute the X-direction locking mechanism of the guide. The X-direction locking mechanism of the guide is installed on the end face of the eccentric shaft hole of the guide box (2). The position of the copper sleeve (4) in the X direction is changed by the rotation of the push rod (6). A lock is provided between the guide (1) and the guide box (2). The locking plate (7) and the guide (1) form a wedge structure. The wedge structure is set between two eccentric shafts (3). The angle of the wedge structure is 20 to 50 degrees. The locking plate (7) and the guide box (2) are provided with a locking rod (8) that is threadedly connected to the locking plate (7). The locking plate (7) and the locking rod (8) constitute the guide YZ direction locking mechanism. The guide YZ direction locking mechanism is installed between the bottom of the guide (1) and the guide box (2). Through the locking rod (8) and the wedge structure between the locking plate (7) and the guide (1), the gap between the guide (1) and the guide box (2) is tightened, reducing the shaking of the guide YZ direction.

2. The universal rolling mill guide locking mechanism according to claim 1, characterized in that: The center hole of the top rod (6) in the X-direction locking mechanism of the guide is an internal hexagonal hole.

3. The universal rolling mill guide locking mechanism according to claim 1, characterized in that: In the YZ direction locking mechanism of the guide, the locking rod (8) that is threadedly connected to the locking plate (7) and the guide box (2) rests on the live pin (9), the live pin (9) is set in the live pin groove (10), and the live pin groove (10) is set on the guide box (2).

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