CN109396192B - Centering machine - Google Patents
Centering machine Download PDFInfo
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- CN109396192B CN109396192B CN201811383120.9A CN201811383120A CN109396192B CN 109396192 B CN109396192 B CN 109396192B CN 201811383120 A CN201811383120 A CN 201811383120A CN 109396192 B CN109396192 B CN 109396192B
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- 238000003825 pressing Methods 0.000 claims abstract description 27
- 230000006835 compression Effects 0.000 claims abstract description 8
- 238000007906 compression Methods 0.000 claims abstract description 8
- 230000000149 penetrating effect Effects 0.000 claims description 9
- 239000012530 fluid Substances 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 description 13
- 239000010959 steel Substances 0.000 description 13
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B25/00—Mandrels for metal tube rolling mills, e.g. mandrels of the types used in the methods covered by group B21B17/00; Accessories or auxiliary means therefor ; Construction of, or alloys for, mandrels or plugs
- B21B25/02—Guides, supports, or abutments for mandrels, e.g. carriages or steadiers; Adjusting devices for mandrels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2273/00—Path parameters
- B21B2273/24—Web positioning
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear Transmission (AREA)
- Press Drives And Press Lines (AREA)
Abstract
The application provides a centering machine, which comprises: a plurality of press rolls, which are arranged around a rolling center line; the driven gears are arranged on the outer sides of the pressing rollers in a surrounding mode; the driven gears correspond to the press rollers, and each driven gear is connected with the corresponding press roller; each of the driven gears has a first rotation axis; a drive gear; the driving gear is arranged on one side of the rolling center line; each driven gear is meshed with the driving gear, and the driving gear is used for driving each driven gear to rotate around the first rotation axis so that a plurality of compression rollers can be opened and closed; the driving mechanism is connected with the driving gear and is used for driving the driving gear to rotate. The embodiment of the application provides a centering machine capable of ensuring accurate synchronization of the opening degree of each compression roller.
Description
Technical Field
The application relates to the technical field of steel pipe rolling perforation, in particular to a centering machine.
Background
The centering machine is used for stabilizing the ejector rod so as to ensure that perforation is smoothly carried out.
Fig. 1 and 2 each show a prior art centering machine. The existing centering machine mainly comprises a frame 50 and a connecting rod mechanism arranged on the frame 50. The link mechanism includes a crank 52, a press roller 54, an upper swing arm 56, a side swing arm 58, a lower swing arm 60, a side pull rod 62, a lower pull rod 64, an upper pull rod 66 (or an opening and closing hydraulic cylinder), and an adjusting hydraulic cylinder 68. The press roller 54 is arranged on the swing arm; the crank 52 swings about a crank hinge point H1; the upper swing arm 56 and the side swing arm 58 swing around an upper hinge point H2; the lower swing arm 60 swings about the lower hinge point H3. The adjusting hydraulic cylinder 68 is used for synchronously driving the upper swing arm 56, the side swing arm 58 and the lower swing arm 60, so as to adjust the opening degree of the press roller 54.
Since the speed and displacement of the crank 52, the upper swing arm 56, the side swing arm 58, and the lower swing arm 60, which are swung around the hinge point by the driving of the adjustment hydraulic cylinder 68, cannot be a fixed value, the variation in the speed and displacement of the crank 52, the upper swing arm 56, the side swing arm 58, and the lower swing arm 60 is uneven, thus resulting in a difference in the speed of each press roller 54 during the opening process, that is, a difference in the opening degree of each press roller 54. Fig. 1 shows an assembly view of the prior art with minimal opening of the rolls of the centering machine, wherein the angular spacing between the rolls 54 is 122.45 °, 117.53 ° and 120.018 °, respectively. Fig. 2 shows an assembly diagram of the prior art centering machine with maximum roll opening, wherein the angular spacing between the rolls 54 is 117.9 °, 122.08 ° and 120.021 °, respectively, whereby it can be seen that there are two rolls 54 with a relatively significant increase and decrease. Such that the center of each press roll 54 is not on a circumference centered on the rolling center line, that is, the positions of the centers of the circles formed are different when the opening degrees of the respective press rolls 54 are different. However, the rolling center line, i.e., the piercing center line, is constant, so that the circle in which each press roll 54 is positioned is eccentric from the circle in the outer diameter section of the steel pipe 14. This eccentricity increases the radial force of the steel pipe 14, resulting in the steel pipe 14 becoming arc-shaped. And the steel pipe 14 is continuously collided with the press roller 54 in the spiral advancing process, so that the field noise is loud, and the service life of the centering machine is influenced.
Disclosure of Invention
In view of this, embodiments of the present application provide a centering machine capable of ensuring precise synchronization of the opening degrees of respective press rollers.
The above object of the present application can be achieved by the following technical solutions: a centering machine, comprising: a plurality of press rolls, which are arranged around a rolling center line; the driven gears are arranged on the outer sides of the pressing rollers in a surrounding mode; the driven gears correspond to the press rollers, and each driven gear is connected with the corresponding press roller; each of the driven gears has a first rotation axis; a drive gear; the driving gear is arranged on one side of the rolling center line; each driven gear is meshed with the driving gear, and the driving gear is used for driving each driven gear to rotate around the first rotation axis so that a plurality of compression rollers can be opened and closed; the driving mechanism is connected with the driving gear and is used for driving the driving gear to rotate.
As a preferred embodiment, the extending direction of the first rotation axis of each driven gear is parallel to the extending direction of the rolling center line.
As a preferred embodiment, the press rolls include a first press roll, a second press roll and a third press roll which are uniformly arranged along the rolling center line, the first press roll faces the driving gear, the second press roll and the third press roll are positioned on one side of the first press roll opposite to the driving gear, the second press roll is positioned above the first press roll, and the third press roll is positioned below the first press roll.
As a preferred embodiment, the driven gear includes a first driven gear connected to the first press roller, a second driven gear connected to the second press roller, and a third driven gear connected to the third press roller; the first driven gear and the second driven gear are meshed with the upper gear teeth of the driving gear, the third driven gear is meshed with the lower gear teeth of the driving gear, and the first driven gear and the second driven gear are oppositely arranged.
As a preferable implementation mode, a idler wheel is arranged between the second driven gear and the driving gear, and gear teeth on two sides of the idler wheel are respectively meshed with the driving gear and the second driven gear.
As a preferred embodiment, each driven gear is provided with a through hole, each through hole is internally provided with a first rotating shaft in a penetrating way, and the extending direction of each first rotating shaft is consistent with the extending direction of the corresponding first rotation axis of the driven gear; and each first rotating shaft is provided with a connecting rod, and each pressing roller is connected with the connecting rod.
As a preferred embodiment, each of the first rotating shafts is fixedly connected with the corresponding driven gear through a key.
As a preferred embodiment, it comprises: a frame; the frame includes the first curb plate and the second curb plate of vertical setting, be provided with first trompil on the first curb plate, be provided with the second trompil on the second curb plate, first trompil with the second trompil is just right mutually, the one end of first pivot wears to locate in the first trompil, the other end of first pivot wears to locate in the second trompil.
As a preferred embodiment, one end of each of the links is connected to the first rotation shaft, the other end of each of the links is connected to the pressing roller, and the length of each of the links is the same.
As a preferred embodiment, the pitch diameter and the modulus of each of the driven gears are the same.
As a preferred embodiment, the pitch circle radius of each driven gear is 275 mm, the pitch circle diameter of the intermediate wheel is 150 mm, and the first rotation axis of each driven gear is located on a circumference with a diameter of 580 mm.
As a preferred embodiment, the driven gear is a sector gear, and the driving gear is a sector gear.
As a preferred embodiment, the driving mechanism comprises a hydraulic cylinder and a plunger penetrating through the hydraulic cylinder, the plunger is connected with the driving gear, and the plunger can reciprocate in a direction perpendicular to the rolling center line under the pressure of fluid in the hydraulic cylinder.
As a preferred embodiment, the driving gear has a second rotation axis, and the extending direction of the second rotation axis is parallel to the extending direction of the rolling center line.
As a preferred embodiment, the tooth width of the driving gear is larger than the tooth width of the first driven gear; and the tooth width of the driving gear is larger than that of the intermediate wheel.
The centering machine provided by the application has the beneficial effects that: according to the centering machine disclosed by the embodiment of the application, the driving gear, the driven gear and the driving mechanism are arranged, so that the opening degree of the compression roller is realized by the rotation of the driving gear and the driven gear. As the angular speed of the driving gear and the driven gear in the rotation process can be kept unchanged, the same speed of each press roller in the opening process can be ensured, and the precise synchronization of the opening of each press roller is further ensured. Therefore, the embodiment of the application provides a centering machine which can ensure the accurate synchronization of the opening degree of each compression roller.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a mechanical assembly diagram of a prior art centering machine with minimal opening;
FIG. 2 is a mechanical assembly diagram of a prior art centering machine with maximum opening;
FIG. 3 is a schematic diagram of the mechanism of a prior art centering machine;
FIG. 4 is a schematic diagram of a centering machine provided by one embodiment of the present application;
fig. 5 is a simplified diagram of a centering machine provided by one embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Please refer to fig. 4 and fig. 5. One embodiment of the present application provides a centering machine, which may include: a plurality of press rolls 23, a plurality of the press rolls 23 being arranged around a rolling center line; a plurality of driven gears 25, wherein the driven gears 25 are arranged on the outer sides of the press rollers 23 in a surrounding manner; and a plurality of the driven gears 25 are corresponding to a plurality of the press rollers 23, each of the driven gears 25 being connected to a corresponding one of the press rollers 23; each of the driven gears 25 has a first rotation axis 31; a drive gear 29; the driving gear 29 is arranged at one side of the rolling center line; each driven gear 25 is meshed with the driving gear 29, and the driving gear 29 is used for driving each driven gear 25 to rotate around the first rotation axis, so that a plurality of compression rollers 23 can be opened and closed; the driving mechanism 53 is connected with the driving gear 29, and the driving mechanism 53 is used for driving the driving gear 29 to rotate.
In use, the drive gear 29 is driven in rotation by the drive mechanism 53. The driving gear 29 is thus able to drive each driven gear 25 to rotate about its respective first rotation axis. And further drives each press roller 23 to rotate about the first rotation axis of the corresponding driven gear 25, thus achieving the opening and cohesion of the plurality of press rollers 23.
The technical scheme can be seen from the above: the centering machine of the embodiment of the present application is provided with the driving gear 29 and the driven gear 25, and the driving mechanism 53, so that the opening degree of the pressing roller 23 is realized by the rotation of the driving gear 29 and the driven gear 25. Since the angular velocity of the driving gear 29 and the driven gear 25 can be maintained unchanged during rotation, the same velocity of each press roller 23 during opening can be ensured, and thus precise synchronization of the opening degree of each press roller 23 can be ensured. Further, as shown in fig. 3, the crank, the press roller 23, the upper swing arm, the side swing arm, the lower swing arm, the side pull rod, the lower pull rod and the upper pull rod of the prior art are crossed with each other, so that the prior art centering machine has to be designed into a double-layer structure in the frame 47, and the minimum design width of the prior art centering machine is limited. In the present embodiment, the width of the centering machine described in the present embodiment can be reduced by gear transmission between the driving gear 29 and the driven gear 25.
As shown in fig. 4, in the present embodiment, a plurality of press rolls 23 are arranged around the rolling center line. Specifically, the press roller 23 includes a first press roller 11, a second press roller 13, and a third press roller 15 that are uniformly arranged along a rolling center line, the first press roller 11 faces the driving gear 29, the second press roller 13 and the third press roller 15 are located on a side of the first press roller 11 facing away from the driving gear 29, the second press roller 13 is located above the first press roller 11, and the third press roller 15 is located below the first press roller 11. That is, 3 press rolls 23 are provided, and the 3 press rolls 23 are uniformly arranged around the rolling center line. And the central angle corresponding to the adjacent two press rolls 23 is 120 degrees. Since the center line of the steel pipe 12 is located on the rolling center line, 3 press rolls 23 can be uniformly arranged around the steel pipe 12, and 3 press rolls 23 can apply uniform force to the steel pipe 12. Further, each press roller 23 is pressed against the circumference of the ejector pin before perforation, that is, the plurality of press rollers 23 are in a clasped state. During perforation, the ejector rod is fixed. The billet moves towards the ejector rod, and the ejector head at the front end of the ejector rod penetrates into the center of the billet to form the steel pipe 12. Since the ejector rod is relatively thin, the outer diameter of the steel tube 12 is thickened, and each press roller 23 moves in a direction away from the steel tube 12 in the perforation process, that is, each press roller 23 changes from a clasping state to an opening state. The number of the pressing rollers 23 is not limited to this, and may be other number, for example, 4, and the present application is not limited thereto.
As shown in fig. 4, in the present embodiment, a plurality of driven gears 25 are provided around the outside of a plurality of pressing rollers 23. That is, the plurality of driven gears 25 are arranged around the rolling center line, and the plurality of driven gears 25 are located outside the plurality of press rollers 23. Further, driven gears 25 correspond to the plurality of pressing rollers 23, each driven gear 25 is connected to the corresponding pressing roller 23, and each driven gear 25 has a first rotation axis 31. Further, the extending direction of the first rotation axis of each driven gear 25 is parallel to the extending direction of the rolling center line. Specifically, the number of driven gears 25 is equal to the number of press rollers 23. For example, the number of the press rollers 23 is 3, and the number of the driven gears 25 is 3. Each driven gear 25 is connected to the corresponding pressing roller 23 by welding, integral molding, or the like, which is not intended to limit the present application. So that each press roller 23 can be driven by the corresponding driven gear 25 to rotate about the first rotation axis 31 of the corresponding driven gear 25 to effect movement of the press roller 23 away from the steel pipe 12 and in a direction toward the steel pipe 12, i.e., each press roller 23 can be shifted between a hugged state and an open state. To ensure that the speed and angular displacement of each driven gear 25 under the drive of the driving gear 29 are the same, the pitch diameter and the modulus of each driven gear 25 are the same.
As shown in fig. 4, in one embodiment, the driven gear 25 includes a first driven gear 17 connected to the first press roller 11, a second driven gear 19 connected to the second press roller 13, and a third driven gear 21 connected to the third press roller 15; the first driven gear 17 and the second driven gear 19 are both engaged with the upper gear teeth of the driving gear 29, the third driven gear 21 is engaged with the lower gear teeth of the driving gear 29, and the first driven gear 17 is disposed opposite to the second driven gear 19.
As shown in fig. 4, in one embodiment, each driven gear 25 is provided with a through hole, and each through hole is penetrated by a first rotating shaft 35, and the extending direction of each first rotating shaft 35 is consistent with the extending direction of the first rotation axis 31 of the corresponding driven gear 25; a connecting rod 39 is provided on each first rotating shaft 35, and each pressing roller 23 is connected with the connecting rod 39. Specifically, one end of each link 39 is connected to the first rotation shaft 35, and the other end of each link 39 is connected to the pressing roller 23. The connection method may be welding, integral molding, or the like, and the present application is not limited thereto. To ensure that the speed and angular displacement of each press roller 23 driven by the corresponding driven gear 25 are the same, the length of each link 39 is the same. Further, each first rotation shaft 35 is fixedly connected with the corresponding driven gear 25 by a key. So that the driven gear 25 can drive the first rotating shaft 35 to rotate when rotating, and the first rotating shaft 35 can drive the connecting rod 39 to rotate.
As shown in fig. 4, in one embodiment, the frame 47 includes first and second side plates 41 and 43 disposed vertically and a bottom plate 45 disposed horizontally. The bottom plate 45 is located between the first side plate 41 and the second side plate 43, and is connected to the first side plate 41 and the second side plate 43. The frame 47 has a rectangular parallelepiped structure as a whole. Of course, the shape of the frame 47 is not limited to this, and may be other shapes, and the present application is not limited to this. Further, a first opening is provided on the first side plate 41 of the frame 47, and a second opening is provided on the second side plate 43 of the frame 47, where the first opening and the second opening are disposed opposite to each other. One end of the first rotating shaft 35 is arranged in the first opening in a penetrating manner, and the other end of the first rotating shaft 35 is arranged in the second opening in a penetrating manner. So that the first rotation shaft 35 is driven to rotate relative to the frame 47 when the driven gear 25 rotates.
As shown in fig. 5, in order to ensure that the circle center of the circle enveloped by each press roller 23 at any opening is at the same position, the pitch circle radius of each driven gear 25 is 275 mm, the pitch circle diameter of the intermediate wheel 27 is 150 mm, the first rotation axis 31 of each driven gear 25 is located on the circumference with a diameter of 580 mm, and the length of each connecting rod 39 is 255 mm.
As shown in fig. 4, in the present embodiment, the driving gear 29 is provided on one side of the rolling center line. The drive gear 29 has a second rotation axis 33 so that the drive gear 29 can rotate about the second rotation axis 33. Further, the driving gear 29 is provided with a through hole, and the second rotating shaft 37 is inserted into the through hole. The extending direction of the second rotating shaft 37 coincides with the extending direction of the second rotation axis 33. Further, the extending direction of the second rotation axis is parallel to the extending direction of the rolling center line. Further, a third opening is provided on the first side plate 41 of the frame 47, and a fourth opening is provided on the second side plate 43 of the frame 47, where the third opening and the fourth opening are disposed opposite to each other. One end of the second rotating shaft 37 is arranged in the third opening in a penetrating way, and the other end of the second rotating shaft 37 is arranged in the fourth opening in a penetrating way. Each driven gear 25 is meshed with a driving gear 29, and the driving gear 29 is used for driving each driven gear 25 to rotate around the first rotation axis, so that the plurality of press rollers 23 can open and close. Specifically, the first rotation axis of the first driven gear 17 and the first rotation axis of the second driven gear 19 are both located above the rolling center line, and the first rotation axis 31 of the third driven gear 21 is located below the rolling center line. I.e. the first rotation shaft 35 of the first driven gear 17 and the first rotation shaft 35 of the second driven gear 19 are both located above the rolling centre line. And the first driven gear 17 is disposed opposite to the second driven gear 19. Further, the first driven gear 17 and the second driven gear 19 are each engaged with the upper gear teeth of the driving gear 29, and the third driven gear 21 is engaged with the lower gear teeth of the driving gear 29. So that when the driving gear 29 rotates in the clockwise direction, the driving gear 29 can drive the first driven gear 17 and the third driven gear 21 to rotate in the clockwise direction. In order to make the rotation direction of the second driven gear 19 opposite to the rotation direction of the first driven gear 17, that is, make the rotation direction of the first press roller 11 and the second press roller 13 opposite, thereby realizing that the first press roller 11 and the second press roller 13 rotate away from the rolling center line or rotate towards the rolling center line at the same time, a intermediate gear 27 is arranged between the second driven gear 19 and the driving gear 29, and gear teeth on two sides of the intermediate gear 27 are respectively meshed with the driving gear 29 and the second driven gear 19. So that when the driving gear 29 rotates in the clockwise direction, the first press roller 11 rotates in the clockwise direction about the first rotation axis of the first driven gear 17, the third press roller 15 rotates in the clockwise direction about the first rotation axis of the third driven gear 21, and the second press roller 13 rotates in the counterclockwise direction about the first rotation axis of the second driven gear 19, so that the first press roller 11, the second press roller 13, and the third press roller 15 all rotate away from the rolling center, that is, the first press roller 11, the second press roller 13, and the third press roller 15 are in an open state. When the driving gear 29 rotates in the counterclockwise direction, the first press roller 11 rotates in the counterclockwise direction about the first rotation axis of the first driven gear 17, the third press roller 15 rotates in the counterclockwise direction about the first rotation axis of the third driven gear 21, and the second press roller 13 rotates in the clockwise direction about the first rotation axis of the second driven gear 19, so that the first press roller 11, the second press roller 13, and the third press roller 15 all rotate toward the rolling center, that is, the first press roller 11, the second press roller 13, and the third press roller 15 are in the clasped state. So that the plurality of pressing rollers 23 can be opened and closed. Further, in order to prevent interference between the first driven gear 17 and the intermediate gear 27, the second driven gear 19, the tooth width of the driving gear 29 is larger than that of the first driven gear 17; and the tooth width of the driving gear 29 is larger than that of the intermediate gear 27.
Further, as shown in fig. 4, the driven gear 25 is a sector gear, and the driving gear 29 is a sector gear.
As shown in fig. 4, in the present embodiment, the driving mechanism 53 is configured to drive the drive gear 29 to rotate about the second rotation axis 33. The drive mechanism 53 is connected to the drive gear 29. Specifically, the driving mechanism 53 includes a hydraulic cylinder 49 and a plunger 51 penetrating the hydraulic cylinder 49, and the plunger 51 is connected to the drive gear 29. The connection mode can be screw connection, bolt connection, integral molding, welding and the like, and the application is not limited to the above. The ram 51 is reciprocally movable in a direction perpendicular to the rolling center line under the pressure of the fluid in the hydraulic cylinder 49. When the plunger 51 is extended under the pressure of the fluid, the drive gear 29 can rotate counterclockwise about the second rotation axis 33. When the plunger 51 is retracted under the pressure of the fluid, the drive gear 29 can rotate clockwise about the second rotation axis 33.
The foregoing is only a few embodiments of the present application and those skilled in the art, in light of the present disclosure, may make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the application.
Claims (9)
1. A centering machine, comprising:
a plurality of press rolls, which are arranged around a rolling center line;
the driven gears are arranged on the outer sides of the pressing rollers in a surrounding mode; the driven gears correspond to the press rollers, and each driven gear is connected with the corresponding press roller; each of the driven gears has a first rotation axis;
a drive gear; the driving gear is arranged on one side of the rolling center line; each driven gear is meshed with the driving gear, and the driving gear is used for driving each driven gear to rotate around the first rotation axis so that a plurality of compression rollers can be opened and closed;
the driving mechanism is connected with the driving gear and is used for driving the driving gear to rotate;
the extending direction of the first rotation axis of each driven gear is parallel to the extending direction of the rolling center line;
the pressing rollers comprise a first pressing roller, a second pressing roller and a third pressing roller which are uniformly distributed along the rolling center line, the first pressing roller faces the driving gear, the second pressing roller and the third pressing roller are positioned on one side of the first pressing roller, which is opposite to the driving gear, the second pressing roller is positioned above the first pressing roller, and the third pressing roller is positioned below the first pressing roller;
the driven gear comprises a first driven gear connected with the first press roller, a second driven gear connected with the second press roller and a third driven gear connected with the third press roller; the first driven gear and the second driven gear are meshed with the upper gear teeth of the driving gear, the third driven gear is meshed with the lower gear teeth of the driving gear, and the first driven gear and the second driven gear are oppositely arranged;
a idler wheel is arranged between the second driven gear and the driving gear, and gear teeth on two sides of the idler wheel are respectively meshed with the driving gear and the second driven gear;
each driven gear is provided with a through hole, each through hole is internally provided with a first rotating shaft in a penetrating way, and the extending direction of each first rotating shaft is consistent with the extending direction of the corresponding first rotation axis of the driven gear; a connecting rod is arranged on each first rotating shaft, and each pressing roller is connected with the connecting rod;
the driven gear is a sector gear, and the driving gear is a sector gear.
2. The centering machine of claim 1, wherein: each first rotating shaft is fixedly connected with the corresponding driven gear through a key.
3. The centering machine of claim 1, characterized in that it comprises: a frame; the frame includes the first curb plate and the second curb plate of vertical setting, be provided with first trompil on the first curb plate, be provided with the second trompil on the second curb plate, first trompil with the second trompil is just right mutually, the one end of first pivot wears to locate in the first trompil, the other end of first pivot wears to locate in the second trompil.
4. The centering machine of claim 1, wherein: one end of each connecting rod is connected with the first rotating shaft, the other end of each connecting rod is connected with the compression roller, and the length of each connecting rod is the same.
5. The centering machine of claim 1, wherein: the pitch diameter and the modulus of each driven gear are the same.
6. The centering machine of claim 1, wherein: the pitch circle radius of each driven gear is 275 mm, the pitch circle diameter of the intermediate wheel is 150 mm, and the first rotation axis of each driven gear is located on a circumference with a diameter of 580 mm.
7. The centering machine of claim 1, wherein: the driving mechanism comprises a hydraulic cylinder and a plunger penetrating through the hydraulic cylinder, the plunger is connected with the driving gear, and the plunger can reciprocate along the direction perpendicular to the rolling center line under the pressure of fluid in the hydraulic cylinder.
8. The centering machine of claim 1, wherein: the driving gear is provided with a second rotation axis, and the extending direction of the second rotation axis is parallel to the extending direction of the rolling center line.
9. The centering machine of claim 1, wherein: the tooth width of the driving gear is larger than that of the first driven gear; and the tooth width of the driving gear is larger than that of the intermediate wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811383120.9A CN109396192B (en) | 2018-11-20 | 2018-11-20 | Centering machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811383120.9A CN109396192B (en) | 2018-11-20 | 2018-11-20 | Centering machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109396192A CN109396192A (en) | 2019-03-01 |
| CN109396192B true CN109396192B (en) | 2023-08-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811383120.9A Active CN109396192B (en) | 2018-11-20 | 2018-11-20 | Centering machine |
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|---|---|
| CN (1) | CN109396192B (en) |
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| CN107060638A (en) * | 2017-04-14 | 2017-08-18 | 奥瑞拓能源科技股份有限公司 | Change the power set of drill bit movement |
| CN206567959U (en) * | 2017-03-29 | 2017-10-20 | 苏州江锦自动化科技有限公司 | Curved tube polishing machine |
| CN107953220A (en) * | 2017-12-26 | 2018-04-24 | 胡振强 | The self-centering high-efficiency grinding machine device of Internal and external cycle |
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2018
- 2018-11-20 CN CN201811383120.9A patent/CN109396192B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB299741A (en) * | 1927-06-30 | 1928-10-30 | Rudolf Bungeroth | Improvements in tube-expanders |
| US3616670A (en) * | 1968-07-31 | 1971-11-02 | Calmes Jean Paul | Device and method for rotating the mandrel in a rotary forging mill |
| CN201572796U (en) * | 2009-12-17 | 2010-09-08 | 济南重工股份有限公司 | Three-roller centering device |
| CN206567959U (en) * | 2017-03-29 | 2017-10-20 | 苏州江锦自动化科技有限公司 | Curved tube polishing machine |
| CN107060638A (en) * | 2017-04-14 | 2017-08-18 | 奥瑞拓能源科技股份有限公司 | Change the power set of drill bit movement |
| CN107953220A (en) * | 2017-12-26 | 2018-04-24 | 胡振强 | The self-centering high-efficiency grinding machine device of Internal and external cycle |
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