CN212821777U - Roller gap automatic adjusting prestress short-stress rolling mill - Google Patents
Roller gap automatic adjusting prestress short-stress rolling mill Download PDFInfo
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- CN212821777U CN212821777U CN202021942816.3U CN202021942816U CN212821777U CN 212821777 U CN212821777 U CN 212821777U CN 202021942816 U CN202021942816 U CN 202021942816U CN 212821777 U CN212821777 U CN 212821777U
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- 238000005096 rolling process Methods 0.000 title claims abstract description 53
- 238000012544 monitoring process Methods 0.000 claims abstract description 8
- 230000001105 regulatory effect Effects 0.000 claims abstract description 3
- 238000006073 displacement reaction Methods 0.000 claims description 28
- 238000012545 processing Methods 0.000 claims description 16
- 230000007246 mechanism Effects 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 229910000831 Steel Inorganic materials 0.000 abstract description 3
- 239000010959 steel Substances 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 abstract description 2
- 238000003754 machining Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 73
- 210000004907 gland Anatomy 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 239000013013 elastic material Substances 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000010727 cylinder oil Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
A roller gap automatic adjustment prestress short-stress rolling mill belongs to the technical field of steel rolling equipment, and particularly relates to an improvement of a short-stress rolling mill structure. The utility model provides a roll gap automatically regulated prestressing force short stress rolling mill that machining precision is high, and production efficiency is high. The utility model discloses a set up in the internal axial fixity of frame have the pull rod, the upper and lower both sides of frame body are provided with roller case and lower roller case respectively, and the interior main nut that is of roller case goes up, and the interior main nut that is of lower roller case goes up between main nut and the lower main nut through positive and negative screw with the pull rod links to each other its characterized in that: main oil cavities are arranged between the upper part of the upper roller box and the lower part of the upper main nut, and between the lower part of the lower roller box and the upper part of the lower main nut, and oil return disc springs of the main oil cavities are arranged between the pull rod and the upper roller box, and between the lower roller box; the frame body is provided with a prestress system of a pull rod and a roller box space real-time monitoring system.
Description
Technical Field
The utility model belongs to the technical field of steel rolling equipment, concretely relates to improvement of short stress rolling mill structure.
Background
The existing short stress rolling mill is mainly applied to the production of small-sized section bars, because the stress line of the rolling mill is much shorter than that of a frame rolling mill because the stress line of the rolling mill forms a stress return line by an upper roller box, a lower roller box, a spherical cushion, a main nut and a pull rod.
Before rolling, the distance of the roll gap between the rolls needs to be preset according to the size of the section, and because gaps exist among parts of the rolling mill, when the rolls pressurize parts, the gaps among the parts of the rolling mill can change, and multiple changes are overlapped together, so that the distance of the roll gap can change, the error is increased, and the condition that the size of a product exceeds a specified range is easily caused.
In order to avoid the above problems, it is necessary to pre-stress the rolls in advance, that is, a pre-stress rolling mill is present, which generally uses an elastic material to pre-stress the rolls so as to eliminate the gap between the respective workpieces, however, the pre-stress cannot be kept constant due to the variation of force caused by the variation of the elastic material with the size.
Meanwhile, in the continuous operation process of the rolling mill, the roll gap can change under the action of abrasion and the like, so that the deviation of larger sizes of an initial product and a final product can be caused, and the product precision cannot be accurately controlled; in addition, in the use process, once the roll gap distance is out of tolerance, the production and the replacement of the rolling mill must be stopped.
Disclosure of Invention
The utility model discloses to above-mentioned problem, provide a roll gap automatically regulated prestressing force short stress rolling mill that machining precision is high, production efficiency is high.
For realizing the above purpose of the utility model, the utility model discloses a following technical scheme, the utility model discloses a set up in the internal axial fixity of frame have the pull rod, the upper and lower both sides of frame body are provided with roller case and lower roller case respectively, and the interior main nut that is of roller case is gone up, and the interior main nut that is of lower roller case goes up between main nut and the lower main nut through positive and negative screw with the pull rod links to each other, its characterized in that: main oil cavities are arranged between the upper part of the upper roller box and the lower part of the upper main nut, and between the lower part of the lower roller box and the upper part of the lower main nut, and oil return disc springs of the main oil cavities are arranged between the pull rod and the upper roller box, and between the lower roller box; the device comprises a rack body, a tension rod, a pre-stressing system and a roller box space real-time monitoring system, wherein the rack body is provided with the tension rod pre-stressing system and the roller box space real-time monitoring system, the pre-stressing system comprises an upper rack end cover and a lower rack end cover which are respectively arranged on the upper side and the lower side of the rack body, an upper pre-stressing piston is arranged above the upper rack end cover, and a lower pre-stressing piston is arranged below; an upper auxiliary oil cavity matched with the upper prestress piston is arranged between the lower part of the upper roller box and the sleeve body at the lower part of the upper main nut; a lower auxiliary oil cavity matched with the lower prestressed piston is arranged between the upper part of the lower roller box and the sleeve body on the upper part of the lower main nut; the real-time monitoring system comprises an upper displacement sensor and a lower displacement sensor which are arranged on the upper side and the lower side of the rack, the upper displacement sensor corresponds to the upper roller box, the lower displacement sensor corresponds to the lower roller box, the upper displacement sensor and the lower displacement sensor are connected with a central processing unit, the central processing unit is connected with a hydraulic system, and the hydraulic system is connected with a main oil cavity and an auxiliary oil cavity through hydraulic pipelines.
As a preferred scheme of the utility model, the main oil intracavity of last roller case be provided with last main nut complex go up the sphere pad, the main oil intracavity of lower roller case be provided with lower main nut complex down the sphere pad, the oil inlet of main oil pocket is corresponding with the gap department between sphere pad and the main nut.
As another preferred scheme of the utility model, the top that lies in main nut on the pull rod and the below of lower main nut all are provided with vice nut, go up the roller case and be provided with the gland that corresponds with vice nut down on the roller case, the oil return dish spring sets up between gland and vice nut.
As a third preferred scheme of the utility model, an axial fixing table is arranged in the middle of the pull rod, and a bearing assembly matched with the axial fixing table is arranged in the frame body; the bearing assembly is fixed between the frame body and the pull rod through the upper frame end cover and the lower frame end cover.
The utility model has the advantages that: 1. the utility model discloses a hydraulic system control top roll case and bottom roll case draw close and keep away from, cooperate real-time detection system and central processing unit to realize the function of online adjustment roll gap, and the product precision obtains effective control, avoids appearing the condition emergence that the product size is out of tolerance and shut down.
2. The utility model discloses an go up the main nut and set up the structure of the cover body down on the main nut, compare with prior art, the vice hydro-cylinder is constituteed to the prestressing force piston of the main nut that length increases, roller box and frame end cover, and during vice hydro-cylinder oil feed, the pull rod receives the pulling force, forms the prestressing force of pull rod, the so-called prestressing force rolling mill promptly.
3. The utility model discloses when not needing roll gap automatic adjustment, can let out the oil of main oil intracavity completely, main nut and ball pad form closely to cooperate under the effect of oil return dish spring and auxiliary oil pocket, open the auxiliary oil pocket bleeder valve again, and the oil return dish spring plays certain prestressing force effect this moment, even the utility model discloses with the operating method of current rolling mill the same.
4. Because the utility model discloses a structural feature, the cooperation through main oil pocket, vice oil pocket, roller box and main nut has both realized the effect of prestressing force, can provide the required great rolling force of rolling mill work again.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the attached drawing, 1 is a lower main nut, 2 is a spherical pad, 3 is a lower prestressed piston, 4 is a lower frame end cover, 5 is a lower displacement sensor, 6 is a frame body, 7 is an upper displacement sensor, 8 is an upper frame end cover, 9 is an upper roller box, 10 is an upper prestressed piston, 11 is an auxiliary oil cavity, 12 is a main oil cavity, 13 is an upper main nut, 14 is an oil return disc spring, 15 is a gland, 16 is a pull rod, 17 is an auxiliary nut, 18 is a pull rod driving mechanism, 19 is an axial fixing table, 20 is a bearing assembly, 21 is a lower roller box, and 22 is a sleeve body.
Detailed Description
The utility model discloses a set up and be provided with pull rod 16 axially fixed in the frame body 6, the upper and lower both sides of frame body 6 are provided with roller box 9 and lower roller box 21 respectively, go up and be main nut 13 in the roller box 9, be main nut 1 down in the lower roller box 21, go up between main nut 13 and the lower main nut 1 through positive and negative screw with pull rod 16 links to each other, its characterized in that: main oil chambers 12 are arranged between the upper part of the upper roller box 9 and the lower part of the upper main nut 13, and between the lower part of the lower roller box 21 and the upper part of the lower main nut 1, and oil return disc springs 14 of the main oil chambers 12 are arranged between the pull rod 16 and the upper roller box 9, and between the lower roller box 21; a prestress system of a pull rod 16 and a roller box interval real-time monitoring system are arranged on the rack body 6, the prestress system comprises an upper rack end cover 8 and a lower rack end cover 4 which are respectively arranged on the upper side and the lower side of the rack body 6, an upper prestress piston 10 is arranged above the upper rack end cover 8, and a lower prestress piston 3 is arranged below the lower rack end cover 4; an upper auxiliary oil cavity 11 matched with the upper prestressed piston 10 is arranged between the lower part of the upper roller box 9 and the sleeve body 22 at the lower part of the upper main nut 13; a lower auxiliary oil cavity 11 matched with the lower prestressed piston 3 is arranged between the upper part of the lower roller box 21 and the sleeve body 22 on the upper part of the lower main nut 1; the real-time monitoring system comprises an upper displacement sensor 7 and a lower displacement sensor 5 which are arranged on the upper side and the lower side of the rack, the upper displacement sensor 7 corresponds to an upper roller box 9, the lower displacement sensor 5 corresponds to a lower roller box 21, the upper displacement sensor 7 and the lower displacement sensor 5 are connected with a central processing unit, the central processing unit is connected with a hydraulic system, and the hydraulic system is connected with a main oil cavity 12 and an auxiliary oil cavity 11 through hydraulic pipelines.
As an optimized scheme of the utility model, be provided with in the main oil chamber 12 of last roller box 9 and go up spherical pad 2 with last main nut 13 complex, be provided with in the main oil chamber 12 of lower roller box 21 and go up spherical pad 2 with lower main nut 1 complex down, the oil inlet in main oil chamber 12 is corresponding with gap department between spherical pad 2 and the main nut.
As another preferred scheme of the utility model, the top that lies in main nut 13 on the pull rod 16 and the below of lower main nut 1 all are provided with vice nut 17, go up and be provided with gland 15 that corresponds with vice nut 17 on roller box 9 and the roller box 21, oil return dish spring 14 sets up between gland 15 and vice nut 17.
As a third preferred aspect of the present invention, an axial fixing table 19 is disposed in the middle of the pull rod 16, and a bearing assembly 20 matched with the axial fixing table 19 is disposed in the frame body 6; the bearing assembly 20 is secured between the housing body 6 and the pull rod 16 by the upper housing end cap 8 and the lower housing end cap 4.
The hydraulic system is connected with the main oil cavity 12 through a high-pressure oil way, and is connected with the auxiliary oil cavity 11 through a low-pressure oil way; the pressure of the main oil chamber 12 is greater than that of the auxiliary oil chamber 11; the pressure of the main oil chamber 12 provides the rolling force.
The upper end of the pull rod 16 is provided with a pull rod driving mechanism 18.
The bearing assembly 20 may be formed by a combination of needle bearings and thrust bearings.
The working process is as follows:
1. the pull rod 16 is controlled to rotate by a pull rod driving mechanism 18, and the pull rod 16 is axially fixed and only can rotate under the limitation of a bearing assembly 20 and an axial fixing platform 19.
2. The upper main nut 13 and the lower main nut 1 are formed integrally with the roller housing through the spherical washer 2, the sub nut 17, the disc spring, the gland 15, and the like, and when the pull rod 16 is rotated, the upper roller housing 9 and the lower roller housing 21 of the upper main nut 13 and the lower main nut 1 are moved toward each other or in reverse.
3. When the device works, the preset roll gap is A. Firstly, the roll gap is adjusted to be A + (1-50 mm) by a mechanical adjustment mode (the pull rod 16 rotates), and the pull rod 16 keeps axially static. The main oil cavity 12 is filled with oil, so that the upper roller box 9 and the lower roller box 21 move oppositely, and after the preset roller gap distance A is reached through the position information transmitted by the upper displacement sensor 7 and the lower displacement sensor 5, the upper roller box 9 and the lower roller box 21 are kept static. Then the oil is fed into the auxiliary oil chamber 11, the upper roller box 9 and the lower roller box 21 move backwards, after the auxiliary oil chamber 11 reaches the preset pressure, the pull rod 16 reaches the specified prestress state, and simultaneously, the upper main nut 13, the lower main nut 1 and the pull rod 16 are in a locking state due to the fact that the pressure acting on the upper main nut 13 and the lower main nut 1 is large. During rolling, the pressure of the auxiliary oil chamber 11 is kept constant all the time, and the upper main nut 13 and the lower main nut 21 are kept in a locked state with the pull rod 16. If the roll gap distance is increased, the high-pressure oil cavity is fed with oil again, and the required roll gap value is finally achieved through the action of the automatic central processing unit. And finishing the roll gap adjustment before the rolling mill works.
When the rolling mill works, if a roll gap (or the size of rolled steel) changes, the upper displacement sensor 7 and the lower displacement sensor 5 convert the sensed position change situation into an electric signal and transmit the electric signal to the central processing unit, the central processing unit compares the electric signal with a preset value and sends an instruction to the hydraulic system to command the main oil cavity 12 and the auxiliary oil cavity 11 to respectively feed oil or drain oil, so that the distance A of the roll gap is kept unchanged from the preset value, and the automatic control of the roll gap is realized.
The utility model discloses constitute the master cylinder (main oil chamber 12) of nonoculture by spherical pad 2, last roller box 9 and lower roller box 21, at rolling mill during operation, bear the rolling force, the oil feed relies on hydraulic system, and high-pressure oil acts on spherical pad 2, because main nut does not have when pull rod 16 is static and removes, so the oil pressure promotes through spherical pad 2 and goes up roller box 9 and lower roller box 21 and remove (go up roller box 9 downstream, lower roller box 21 rebound) in opposite directions, makes the roll gap reduce. The return oil pushes the upper roller box 9 and the lower roller box 21 to move back and forth by means of the force of the disc spring and the auxiliary oil cavity 11 acting on the roller box, so that the roller gap is increased.
The single-acting auxiliary oil cylinder is composed of an upper main nut 13, a lower main nut 1, an upper frame end cover 8, a lower frame end cover 4, an upper roll box 9 and a lower roll box 21 which are lengthened. When oil is fed, oil pressure acts on the upper rack end cover 8, the lower rack end cover 4, the upper roller box 9 and the lower roller box 21, the upper rack end cover 8 and the lower rack end cover 4 are fixed on the rack, and the rack is fixed on a rolling mill base (not shown) and is a static part, so the oil pressure pushes the upper roller box 9 and the lower roller box 21 to move in the back direction, and the pull rod 16 is subjected to a pulling force, namely, prestress is formed on the pull rod 16.
An automatic central processing unit for keeping the roll gap unchanged is formed by an upper displacement sensor 7, a lower displacement sensor 5, a central processing unit and a hydraulic system. The utility model discloses a rolling mill is at the during operation, comes the positional information of real-time perception roller case and gives central processing unit with information transfer through upper displacement sensor 7 and lower displacement sensor 5, and central processing unit calculates the situation of change of roll gap through the comparison with preset value, if the roll gap exceeds preset value, sends oil feed or draining signal for high pressure cylinder's hydraulic system to the position of adjustment roller case finally realizes roll gap automatic control's purpose.
When the roll gap is not required to be automatically realized in the production process, oil in the main oil cavity 12 is firstly drained, the upper main nut 13, the lower main nut 1 and the spherical cushion 2 form tight fit under the action of the oil return disc spring 14 and the auxiliary oil cylinder, and then an oil drain valve (not shown in the drawing) of the auxiliary oil cavity 11 is opened, namely the operation method is the same as that used by the existing rolling mill.
The high-pressure main oil chamber 12 and the low-pressure auxiliary oil chamber 11 are organically integrated through the lengthened upper main nut 13 and the lengthened lower main nut 1, so that the function of prestress is realized, and a larger rolling force required by the operation of a rolling mill can be provided.
When the rolling mill of the utility model is used in the whole line (consisting of a plurality of rolling mills), the following adjustment can be simultaneously carried out on a plurality of rolling mills or a single rolling mill on the production line: A. and presetting the roll gap of each rolling mill in a central processing unit according to different temperatures of each section of each blank.
B. And presetting or online adjusting the roll gap of each rolling mill in a central processing unit according to different process requirements of rough rolling, medium rolling and finish rolling.
C. The roll gap of each rolling mill is adjusted on line according to different states (such as changes generated by roll abrasion, fit clearance and the like) of each rolling mill in the using process.
It should be understood that the above detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can still be modified or equivalently replaced to achieve the same technical effects; as long as the use requirement is satisfied, the utility model is within the protection scope.
Claims (7)
1. The utility model provides a roll gap automatically regulated prestressing force short stress rolling mill, is provided with pull rod (16) including setting up axial fixity in frame body (6), and the upper and lower both sides of frame body (6) are provided with roller box (9) and lower roller box (21) respectively, are last main nut (13) in last roller box (9), are lower main nut (1) in lower roller box (21), go up between main nut (13) and lower main nut (1) through positive and negative screw with pull rod (16) link to each other its characterized in that: main oil cavities (12) are arranged between the upper part of the upper roller box (9) and the lower part of the upper main nut (13) and between the lower part of the lower roller box (21) and the upper part of the lower main nut (1), and oil return disc springs (14) of the main oil cavities (12) are arranged between the pull rod (16) and the upper roller box (9) and between the lower roller box (21); a prestress system of a pull rod (16) and a roller box interval real-time monitoring system are arranged on the rack body (6), the prestress system comprises an upper rack end cover (8) and a lower rack end cover (4) which are respectively arranged on the upper side and the lower side of the rack body (6), an upper prestress piston (10) is arranged above the upper rack end cover (8), and a lower prestress piston (3) is arranged below the lower rack end cover (4); an upper auxiliary oil cavity matched with the upper prestressed piston (10) is arranged between the lower part of the upper roller box (9) and the sleeve body (22) at the lower part of the upper main nut (13); a lower auxiliary oil cavity matched with the lower prestressed piston (3) is arranged between the upper part of the lower roller box (21) and the sleeve body (22) at the upper part of the lower main nut (1); the real-time monitoring system comprises an upper displacement sensor (7) and a lower displacement sensor (5) which are arranged on the upper side and the lower side of the rack, the upper displacement sensor (7) corresponds to the upper roller box (9), the lower displacement sensor (5) corresponds to the lower roller box (21), the upper displacement sensor (7) and the lower displacement sensor (5) are connected with a central processing unit, the central processing unit is connected with a hydraulic system, and the hydraulic system is connected with a main oil cavity (12) and two auxiliary oil cavities through hydraulic pipelines.
2. The rolling mill with automatically adjusted roll gap and short prestress according to claim 1, is characterized in that: an upper spherical pad (2) matched with an upper main nut (13) is arranged in a main oil cavity (12) of the upper roller box (9), a lower spherical pad (2) matched with a lower main nut (1) is arranged in a main oil cavity (12) of the lower roller box (21), and an oil inlet of the main oil cavity (12) corresponds to a gap between the spherical pad (2) and the main nut.
3. The rolling mill with automatically adjusted roll gap and short prestress according to claim 1, is characterized in that: the upper portion of the upper main nut (13) and the lower portion of the lower main nut (1) on the pull rod (16) are provided with auxiliary nuts (17), the upper roller box (9) and the lower roller box (21) are provided with pressing covers (15) corresponding to the auxiliary nuts (17), and the oil return disc spring (14) is arranged between the pressing covers (15) and the auxiliary nuts (17).
4. The rolling mill with automatically adjusted roll gap and short prestress according to claim 1, is characterized in that: an axial fixing table (19) is arranged in the middle of the pull rod (16), and a bearing assembly (20) matched with the axial fixing table (19) is arranged in the frame body (6); the bearing assembly (20) is fixed between the frame body (6) and the pull rod (16) through the upper frame end cover (8) and the lower frame end cover (4).
5. The rolling mill with automatically adjusted roll gap and short prestress according to claim 1, is characterized in that: the hydraulic system is connected with the main oil cavity (12) through a high-pressure oil way, and is connected with the auxiliary oil cavity through a low-pressure oil way; the pressure of the main oil chamber (12) is greater than that of the auxiliary oil chamber; the pressure of the main oil chamber (12) provides the rolling force.
6. The rolling mill with automatically adjusted roll gap and short prestress according to claim 1, is characterized in that: and a pull rod driving mechanism (18) is arranged at the upper end of the pull rod (16).
7. The rolling mill with automatically adjusted roll gap and pre-stress short stress as claimed in claim 4, wherein: the bearing assembly (20) is formed by combining a needle bearing and a thrust bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021942816.3U CN212821777U (en) | 2020-09-08 | 2020-09-08 | Roller gap automatic adjusting prestress short-stress rolling mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021942816.3U CN212821777U (en) | 2020-09-08 | 2020-09-08 | Roller gap automatic adjusting prestress short-stress rolling mill |
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| Publication Number | Publication Date |
|---|---|
| CN212821777U true CN212821777U (en) | 2021-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021942816.3U Active CN212821777U (en) | 2020-09-08 | 2020-09-08 | Roller gap automatic adjusting prestress short-stress rolling mill |
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| Country | Link |
|---|---|
| CN (1) | CN212821777U (en) |
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2020
- 2020-09-08 CN CN202021942816.3U patent/CN212821777U/en active Active
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shenyang Dalu Laser Complete Equipment Co.,Ltd. Assignor: Shenyang Dalu Laser Technology Co.,Ltd. Contract record no.: X2023210000149 Denomination of utility model: A type of roller gap automatic adjustment pre-stressed short stress rolling mill Granted publication date: 20210330 License type: Common License Record date: 20230927 |
|
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shenyang Continental Laser Group Co.,Ltd. Assignor: Shenyang Dalu Laser Technology Co.,Ltd. Contract record no.: X2023210000150 Denomination of utility model: A type of roller gap automatic adjustment pre-stressed short stress rolling mill Granted publication date: 20210330 License type: Common License Record date: 20231007 |