Positioning device for roller flat head

Abstract

The present invention relates to a positioning device for a flat head of a rolling mill. The purpose of the present invention is to provide a device that ensures that the flat head of the shaft end of the rolling mill is kept in a centered posture to complete the assembly with the connecting hole of the shaft end of the transmission shaft. A limiting rod or strip is set on the frame of the integral roller system on the side where the flat head end of the rolling mill is located. The transmission mechanism is connected to the limiting rod or strip and drives the limiting part on the latter to form contact or separation with the plane of the flat head of the rolling mill. When the limiting part on the limiting rod or strip contacts the plane of the flat head of the rolling mill, the contact matching surface is located in the horizontal plane. A limiting rod or strip is installed on the frame of the integral roller system. During the transportation process, the integral roller system is limited by the limiting rod or strip, so that the plane of the flat head is always located in the horizontal plane, that is, it is in a posture adapted to the connecting hole of the shaft section of the transmission shaft, thereby ensuring the smoothness of the insertion of the two, effectively protecting the transmission shaft and the rolling mill from damage, and extending the service life.

Description

Technical Field

[0001] The invention relates to the technical field of steel rolling machinery, and in particular to a positioning device for a flat head of a rolling roller. Background Art

[0002] Rolling mills are commonly used mechanical equipment in the metallurgical industry. When the rolling mill is working, the roll system is generally composed of support rolls, working rolls, etc. The rolls in the roll system always have to bear the rolling force with changing direction and size. The rolls will cause fatigue wear or damage after long-term use, and the rolls need to be maintained or replaced. In order to save time and improve the working efficiency of the rolling mill, the solution of replacing the integral roll system is adopted, that is, when the old roll system is damaged, it is directly disassembled and installed with a new roll system to ensure the normal operation of the rolling mill, and then the rolls in the worn old roll system are uniformly replaced in the background.

[0003] There are certain problems when the new roller system is replaced. The driving motor is through the non-circular cross-section hole wall of the connecting hole at the shaft end of the transmission shaft, that is, the hole wall includes two arc segments and two plane segments arranged symmetrically in the circumference, and the flat head of the shaft end of the roller, that is, the two arc segments and two plane segments arranged symmetrically in the circumference at the shaft end, to achieve plug-in matching to achieve torque transmission. The transmission shaft can control the position of the plane part of its connecting hole through the motor controller, that is, to ensure that the plane part of the connecting hole is located in the horizontal plane, but the position of the flat head of the new roller system is random, that is, because the roller is installed on the roller system support by bearings, the roller has the possibility of arbitrary rotation, so the position of the plane part of the shaft end of the roller is random during the transportation process, that is, the position of the plane part of the shaft end of the roller cannot be maintained in the horizontal direction, so when it is assembled with the drive shaft plug-in, it is often necessary to rotate the roller to adjust the position of the plane part of the shaft end of the roller to match the transmission shaft. In the prior art, there is no standard position for operators to follow, and they can only be determined by visual inspection and experience. The serious consequence of this is that the connecting hole between the flat head of the roller and the shaft end of the drive shaft is forcibly inserted without alignment, which can easily cause damage to the drive shaft and the roller. Because the traction mechanism is usually an oil cylinder, the forced application of hydraulic power makes it difficult to avoid assembly accidents. Summary of the invention

[0004] The purpose of the present invention is to provide a method for ensuring that the flat head of the shaft end of the roller is kept in a centered posture to complete the assembly with the connecting hole of the shaft end of the transmission shaft.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a positioning device for the flat head of a rolling mill, a limiting rod or a strip is arranged on the frame of the integral roller system on the side where the flat head end of the rolling mill is located, a transmission mechanism is connected to the limiting rod or the strip and drives the limiting part on the latter to form contact or separation with the plane of the flat head of the rolling mill, and when the limiting part on the limiting rod or the strip contacts the plane of the flat head of the rolling mill, the contact mating surface is located in the horizontal plane.

[0006] In the above scheme, a limiting rod or strip is installed on the frame of the integral roller system. During the transportation process, the integral roller system is limited by the limiting rod or strip, and the plane of the flat head is always located in the horizontal plane, that is, it is in a posture adapted to the connecting hole of the transmission shaft section, thereby ensuring the smooth insertion of the two, effectively protecting the transmission shaft and the roller from damage, and extending the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a schematic diagram of the assembly of the present invention and the roller system;

[0008] Figure 2 It is a structural schematic diagram of the roller system;

[0009] Figure 3 It is a structural schematic diagram of the present invention;

[0010] Figure 4 It is a schematic diagram of the clamping state of the present invention;

[0011] Figure 5 This is a schematic diagram of the present invention in an open state. DETAILED DESCRIPTION

[0012] For ease of explanation and understanding, several basic concepts of direction and position are first explained and defined.

[0013] The power side or end of the rolling mill or roller refers to the side where the roller shaft end is connected to the power shaft, and the side or end opposite to it is the operating side or end; the up and down directions refer to the state where the roller is placed horizontally, and the following description only takes this state as an example. The rolling mill can be placed in a vertical manner to implement rolling.

[0014] See also Figure 1 , Figure 2 A positioning device for a flat head of a rolling mill. A limiting rod or strip 10 is arranged on the frame of the integral roller system A on the side where the flat head end of the rolling mill B is located. The transmission mechanism is connected to the limiting rod or strip 10 and drives the limiting part 11 on the latter to form contact or separation with the plane of the flat head of the rolling mill B. When the limiting part 11 on the limiting rod or strip 10 contacts the plane of the flat head of the rolling mill B, the contact matching surface is located in the horizontal plane. The flat head of the rolling mill B is located on the power side of the rolling mill. In order to ensure that the flat head at the shaft end is always kept in the posture of being aligned with the connecting hole at the shaft end of the transmission shaft, the limiting rod or strip 10 is installed on the frame of the integral roller system A on the side where the flat head end is located in advance in the assembly workshop of the integral roller system A. During the transportation process, the integral roller system A is limited by the limiting rod or strip 10, and the plane of the flat head is always located in the horizontal plane, that is, it is in the posture of being adapted to the connecting hole of the shaft section of the transmission shaft, thereby ensuring the smoothness of the insertion of the two, effectively protecting the transmission shaft and the rolling mill from damage, and extending the service life.

[0015] As a preferred embodiment of the present invention, Figure 3-Figure 5 As shown, the limiting rod 10 is in the shape of a rod plate, the limiting portion 11 is in the shape of a strip plate and is arranged in the middle of the limiting rod 10, and a straight edge of the strip plate constituting the limiting portion 11 is a limiting edge 111 that contacts and cooperates with the plane of the flat head of the roller B. The contact cooperation between the limiting edge 111 and the flat head is surface or line contact, which improves the reliability of limiting the flat head.

[0016] Since the flat head of the roller B only needs to ensure that its plane is facing upward before the sleeve is inserted into the shaft end connection hole of the transmission shaft, if it still abuts against the flat head during the sleeve insertion process, it will hinder the flat head from being inserted into the shaft end connection hole of the transmission shaft. After the sleeve insertion is completed, the flat head needs to rotate to transmit torque. Therefore, the limit rod 10 needs to be moved to the avoidance position in these two links. The limit rod 10 is connected to the swing arm 20. When the swing arm 20 swings, it drives the limit rod 10 to swing and swings to the plane contact with the flat head of the roller B. The contact mating surface is located in the horizontal plane. The swing arm 20 swings and drives the limit rod 10 to be in contact with the plane of the flat head of the roller B and swing to the position where the limit rod 10 avoids the flat head and the sleeve of the transmission shaft.

[0017] In order to realize the swinging action of the swing arm 20, the middle part of the swing arm 20 connected to the limit rod 10 is hinged on the side bracket 30 through the first hinge shaft 21, the outer end of the swing arm 20 is hinged to one end of the connecting rod 25 through the second hinge shaft 22, and the other end of the connecting rod 25 is hinged to the movable frame 40 through the third hinge shaft 23. The first, second and third hinge shafts 21, 22 and 23 are arranged in parallel and the axis cores of the hinge shafts are arranged perpendicular to the roller core of the roller B. When it is necessary to release the limit of the flat head by the limit rod 10, the movable frame 40 is pulled toward the power side of the roller, and the swing arm 20 rotates around the second and third hinge shafts 22 and 23 until the first, second and third hinge shafts 21, 22 and 23 are in line. According to the principle of the connecting rod mechanism, it is in the dead point position at this time, and the external force pulling the movable frame 40 is released, and the swing arm 20 and the connecting rod 25 are still stable in the current position.

[0018] In order to ensure the reliability of the limit rod 10 limiting the flat head, a hanging part 24 is provided at the inner end of the swing arm 20. The hanging part 24 is in a hook shape. When the hanging part 24 is hung with the frame of the integral roller system A, the limiting edge 111 of the limiting part 11 contacts and cooperates with the plane of the flat head of the roll B. Since the hanging part 24 is hung with the frame of the integral roller system A, the limit rod 10 is always in a state of pressing the flat head when the movable frame 40 is not subjected to external force.

[0019] Furthermore, the movable frame 40 is an annular frame, the middle of the frame is a missing portion 41, and ear shafts 42 are provided in the middle of both sides of the frame protruding to both sides. The ear shafts 42 pass through the first strip hole 31 provided on the side bracket 30 and form a sliding fit. The length direction of the first strip hole 31 is consistent with the axial direction of the roller B. The missing portion 41 area is for the transmission shaft to pass through. When it is necessary to release the limit of the flat head by the limit rod 10, the driving mechanism pulls the ear shaft 42 to move in the direction defined by the first strip hole 31, thereby driving the swing arm 20 to swing.

[0020] like Figure 2 As shown, a clamping block 32 is provided at the front end of the side bracket 30 near the integral roller system A, and the clamping block 32 is clamped and matched with a clamping groove 51 provided on the connecting frame 50 provided on the left and right sides of the integral roller system A. The upper and lower ends of the connecting frame 50 are provided with a hanging position 52 for the hanging part 24 to hang. The clamping groove 51 limits the displacement of the side bracket 30 in the up and down direction and the material in and out direction, and the hanging position 52 limits the displacement of the side bracket 30 in the axial direction of the roller B.

[0021] In order to ensure the sliding stability between the movable frame 40 and the side frame 30, a plurality of second strip holes 33 are also opened on the side frame 30. The length direction of the second strip holes 33 is consistent with the axial direction of the rolling roller B. The protrusions 43 arranged on the two side edges of the movable frame 40 are placed in the second strip holes 33 and constitute a sliding fit in the direction of the hole length and a limiting fit in the direction of the hole depth.

[0022] For different integral roller systems A, the flat head height of the rolling roller B is different. In order to increase the versatility of the present invention, the limiting portion 11 is in the shape of a bent strip as a whole, including a bottom plate 112 and a pressure plate 113. The bolt 12 is connected to the bottom plate 112 after passing through the threaded hole opened on the limiting rod 10. The end of the bolt 12 is placed in the bottom plate 112 and forms an axial limit and circumferential rotation fit with the bottom plate 112. The rotating bolt 12 drives the bottom plate 112 to move up and down. Two guide pins 13 arranged in the vertical direction are provided on the upper end surface of the bottom plate 112. The guide pins 13 pass through the guide holes opened on the limiting rod 10 to form a guide fit. The limiting rod 10 also has two threaded holes. The clamping bolt 14 passes through the threaded holes and is pressed on the upper plate surface of the bottom plate 112. The rotating bolt 12 can adjust the height of the limiting portion 11 to match the height of the flat head to be positioned. The guide pin 13 is provided to ensure that the limiting edge 111 is in a horizontal position so that the plane of the flat head can be in a horizontal position.

[0023] Due to space limitations, the side bracket 30 cannot be made very wide, and the first strip hole 31 is extended through the side away from the integral roller system A to the edge of the side bracket 30. In other words, the first strip hole 31 is preferably a U-shaped hole, so that the driving mechanism pulls the movable frame 40 toward the power side of the roller, and the ear shaft 42 can exceed the edge of the side bracket 30 and continue to move toward the power side.

Claims

1. A positioning device for a flat head of a rolling mill, characterized in that: A limit rod (10) is arranged on the frame of the integral roller system (A) on the side where the flat head end of the roller (B) is located, and a transmission mechanism is connected to the limit rod (10) and drives the limit part (11) on the limit rod (10) to contact or separate with the plane of the flat head of the roller (B), and when the limit part (11) on the limit rod (10) contacts with the plane of the flat head of the roller (B), the contact matching surface is located in a horizontal plane; The limit rod (10) is connected to the swing arm (20), and when the swing arm (20) swings, it drives the limit rod (10) to swing, and when it swings to contact the plane of the flat head of the roller (B), the contact matching surface is located in the horizontal plane; The middle part of a swing arm (20) connected to the limit rod (10) is hinged to the side bracket (30) via a first hinge shaft (21), the outer end of the swing arm (20) is hinged to one end of a connecting rod (25) via a second hinge shaft (22), and the other end of the connecting rod (25) is hinged to the movable frame (40) via a third hinge shaft (23), the first, second and third hinge shafts (21, 22, 23) are arranged in parallel and the axis cores of the hinge shafts are arranged perpendicular to the roller core of the roller (B); The inner end of the swing arm (20) is provided with a hanging portion (24), which is in the shape of a hook. When the hanging portion (24) is hung with the frame of the integral roller system (A), the limiting edge (111) of the limiting portion (11) contacts and cooperates with the plane of the flat head of the roller (B); The movable frame (40) is an annular frame, the middle of the frame is a missing portion (41), and ear shafts (42) are provided in the middle of both sides of the frame protruding toward both sides. The ear shafts (42) pass through the first strip hole (31) provided on the side bracket (30) and form a sliding fit. The length direction of the first strip hole (31) is consistent with the axial direction of the roller (B).

2. The positioning device for the flat head of a rolling mill according to claim 1, characterized in that: The limiting rod (10) is in the shape of a rod plate, the limiting portion (11) is in the shape of a strip plate and is arranged in the middle of the limiting rod (10), and a straight edge of the strip plate constituting the limiting portion (11) is a limiting edge (111) that contacts and cooperates with the plane of the flat head of the roller (B).

3. The positioning device for the flat head of a rolling mill according to claim 1, characterized in that: A clamping block (32) is provided at the front end of the side bracket (30) close to the integral roller system (A), and the clamping block (32) is engaged with a clamping groove (51) provided on a connecting frame (50) provided on the left and right sides of the integral roller system (A). The upper and lower ends of the connecting frame (50) are provided with a hanging position (52) for hanging the hanging part (24).

4. The positioning device for the flat head of a rolling mill according to claim 3, characterized in that: The side bracket (30) is also provided with a plurality of second strip holes (33), the length direction of the second strip holes (33) being consistent with the axial direction of the roller (B), and the protrusions (43) provided on both side edges of the movable bracket (40) are placed in the second strip holes (33) and form a sliding fit in the hole length direction and a limiting fit in the hole depth direction.

5. The positioning device for the flat head of a rolling mill according to claim 1 or 2, characterized in that: The limiting portion (11) is in the shape of a bent strip as a whole, and comprises a bottom plate (112) and a pressure plate (113). The bolt (12) passes through a threaded hole provided on the limiting rod (10) and is connected to the bottom plate (112). The end of the bolt (12) is placed in the bottom plate (112) and forms an axial limiting and circumferential rotational fit with the bottom plate (112). The rotating bolt (12) drives the bottom plate (112) to move up and down. Two guide pins (13) arranged in the vertical direction are provided on the upper end surface of the bottom plate (112). The guide pins (13) pass through the guide hole provided on the limiting rod (10) to form a guide fit. The limiting rod (10) also has two threaded holes. The clamping bolt (14) passes through the threaded hole and is clamped on the upper plate surface of the bottom plate (112).

6. The positioning device for the flat head of a rolling mill according to claim 1, characterized in that: The first strip-shaped hole (31) extends through a side away from the integral roller system (A) to the edge of the side bracket (30).

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