CN115647053B

CN115647053B - Finishing mill group

Info

Publication number: CN115647053B
Application number: CN202211566503.6A
Authority: CN
Inventors: 王雪川; 王志刚; 商吉勇; 罗玉民; 刘占广; 晋国广; 王存林; 赵春雨; 冯秀军; 周志伟; 高志强; 王志德; 徐锐; 张永刚; 王存书
Original assignee: Hebei Zongheng Group Fengnan Steel Co Ltd
Current assignee: Hebei Zongheng Group Fengnan Steel Co Ltd
Priority date: 2022-12-07
Filing date: 2022-12-07
Publication date: 2023-03-21
Anticipated expiration: 2042-12-07
Also published as: CN115647053A

Abstract

The invention relates to the technical field of steel strip finish rolling equipment and discloses a finish rolling unit, wherein supporting shafts are movably connected with detection cylinders, a connecting frame on at least one side is provided with an interval measuring device, the interval measuring device is used for detecting a gap between the two supporting shafts, at least one detection cylinder is provided with an angular velocity sensor used for detecting the rotating speed of the detection cylinder, and whether a differential speed exists between the linear velocities of the detection cylinder and the supporting rollers is judged. The fault finishing mill is replaced by the roller way, the condition that the finishing mill is lacked can be guaranteed, production benefits are guaranteed, meanwhile, whether the supporting roller slips with the blank or not is judged through the linear velocity difference between the detection cylinder and the supporting roller, the rotating speed of the supporting roller is guaranteed to be consistent with the moving speed of the blank, and when the blank passes through the roller way, parameters such as the thickness of the middle part of the blank, the thickness difference between the two sides and the middle part of the blank, the uniformity of the blank and the like are checked, so that a worker can know the rolling quality in time.

Description

Finishing mill group

Technical Field

The invention relates to the technical field of steel strip finish rolling equipment, in particular to a finish rolling unit.

Background

The finishing mill is used for rolling a rough-rolled billet into a billet specification, and a finishing mill group is generally composed of a plurality of finishing mills to continuously roll the billet.

The finishing mill as a large-scale device works in a high-pressure, high-temperature and high-humidity environment, and the device has large abrasion during operation, so that the problem of part damage can be frequently caused, but the repair of some parts takes a long time for many months. In order to avoid shutdown, rolling parameters are adjusted in actual production, and production is continued under the condition of less rolling mills. The scale of the steel strip production line is large and difficult to adjust. The space created by the removal of the finishing mill during maintenance may cause the blank to fall down, reducing the blank quality of the steel strip, and therefore, an apparatus is required to fill the space created by the removal of the finishing mill.

The supporting structure such as current scheme often adopts guide slot structure or bearing roller structure to support the steel band, but, because the mismatching of speed, can lead to taking place relative slip between supporting structure and the steel band, can influence stock rolling efficiency promptly, also can influence off-the-shelf shaping quality.

Secondly, because the formed product is rolled in the absence of a finishing mill, the operational reliability of the formed product is lower than that of a normal finishing mill group, and therefore equipment is required to detect the blank at the outlet of the finishing mill group so that workers can know the rolling condition in time.

Disclosure of Invention

In order to overcome the defects of the background technology, the invention provides a technical scheme of a finishing mill group, wherein a roller way is used for replacing a failed finishing mill, the work production can be ensured under the condition that one finishing mill is lacked, the production benefit is ensured, meanwhile, whether a supporting roller slips with a blank or not is judged by detecting the linear velocity difference between a cylinder and the supporting roller, the rotating speed of the supporting roller is ensured to be consistent with the moving speed of the blank, and parameters such as the thickness of the middle part of the blank, the thickness difference between two sides and the middle part of the blank, the uniformity of the blank and the like are checked when the blank passes through the roller way, so that a worker can know the rolling quality in time, and the problems provided by the background technology are solved.

The invention provides the following technical scheme: a finishing mill group comprises a roller way and at least two finishing mills, wherein the finishing mills are continuously arranged along a production line, the positions of the finishing mills can be adjusted, when any one finishing mill is damaged, the damaged finishing mill is removed, the positions of the finishing mills are readjusted to empty the finishing mill position at the tail part, and the roller way is used for filling the finishing mill position at the tail part and supporting blanks;

the roll table includes two sets of backing rolls, one side of backing roll is equipped with driving motor, and is two sets of be equipped with the link between the backing roll, link sliding connection has two sets of back shafts, and is two sets of be equipped with separation structure and extension spring between the back shaft, separation structure are used for separating the back shaft, make and leave the clearance between the two, back shaft swing joint has a detection section of thick bamboo, is equipped with interval measuring device on the link of one side at least, interval measuring device is used for detecting the clearance between two back shafts, has one at least be equipped with the angular velocity transducer who is used for detecting a detection section of thick bamboo rotational speed on the detection section of thick bamboo, judge whether there is the differential between the linear velocity of a detection section of thick bamboo and backing roll, when there is the differential, then adjust the backing roll rotational speed, make it unanimous with the linear velocity of a detection section of thick bamboo.

Preferably, the distance measuring device is a grating.

Preferably, the separating structure is a T-shaped rod, and the T-shaped rod is fixedly arranged in the middle of the two groups of supporting shafts.

Preferably, it is located the middle part of back shaft to detect a section of thick bamboo, the both sides of detecting a section of thick bamboo all are equipped with sliding sleeve, sliding sleeve can carry out the axial adjustment for the back shaft, sliding sleeve fixedly connected with linking arm, be equipped with the contact wheel on the linking arm, be equipped with the torsional spring between sliding sleeve and the back shaft and make the contact wheel paste tight stock, be equipped with limit structure between sliding sleeve and the back shaft, make linking arm and vertical direction have the contained angle, the last angle detection device that is equipped with of sliding sleeve judges that the thickness of stock both sides and middle part is poor through turned angle.

Preferably, the sliding sleeve is fixedly connected with a driven arm, the length of the driven arm is greater than that of the connecting arm, and the tail end of the driven arm is connected with a displacement measuring structure which is used for detecting the movement amount of the driven arm.

Preferably, the separating structure is a pneumatic rod, two ends of the pneumatic rod are fixedly connected with the two supporting shafts respectively, at least one group of the supporting shafts is provided with a detection device for detecting the arrival of the blank, the supporting shafts are in an extension state, and when the detection device detects the arrival of the blank, the supporting shafts are triggered to deflate.

Preferably, the pneumatic rod is connected with a stop valve and a pressure valve, and the stop valve and the pressure valve are connected in series in the same air outlet.

The invention has the following beneficial effects:

1. according to the finishing mill group, a failed finishing mill is replaced by the roller way, the work production can be ensured under the condition that one finishing mill is lacked, and the production benefit is ensured.

2. According to the finishing mill group, whether the support roll slips with the blank or not is judged through the linear velocity difference between the detection cylinder and the support roll, the rotation speed of the support roll is consistent with the moving speed of the blank, the situation that the moving speed of the blank interferes with the movement of the blank in a rolling line is avoided, the rolling quality is guaranteed, and scratches generated on the blank are also avoided.

3. When the blank passes through the roller way, the finishing mill group checks parameters such as the thickness of the middle part of the blank, the thickness difference between the two sides and the middle part, the uniformity of the blank and the like, and ensures that a worker can know the rolling quality in time.

Drawings

FIG. 1 is a schematic structural view of a roller bed according to the present invention;

FIG. 2 is a schematic representation of the finishing block prior to structural replacement;

FIG. 3 is a schematic view of the finishing train after structural substitution;

FIG. 4 is a schematic structural diagram of a connecting frame according to an embodiment of the present invention;

FIG. 5 is a side view of a cartridge according to the present invention;

FIG. 6 is a front view of a cartridge according to the present invention;

FIG. 7 is a front view of a connecting frame according to a second embodiment of the present invention;

fig. 8 is a schematic structural view of an air outlet according to a second embodiment of the present invention.

In the figure: 100. a roller bed; 110. a support frame; 111. a slider; 120. a support roller; 121. a drive motor; 130. a detection cylinder; 131. a sliding sleeve; 132. a connecting arm; 133. a contact wheel; 134. a driven arm; 135. a displacement measuring structure; 140. a connecting frame; 141. a chute; 142. a moving block; 143. a support shaft; 144. a tension spring; 145. a pneumatic rod; 146. a grating; 147. a stop valve; 148. a pressure valve; 149. a T-shaped rod; 150. an angular velocity sensor.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

Referring to fig. 2-3, an example of an F1-F7 finishing mill group is shown, which includes F1-F7 finishing mills and a roller way 100, wherein the F1-F7 finishing mills are continuously arranged, the bottoms of the F1-F7 finishing mills are provided with slideways, the finishing mills can slide along a production line when the F1-F7 finishing mills are released from fixing, when any one finishing mill is damaged, the finishing mills are contacted with the fixing of the F1-F7 finishing mills, the remaining 6 finishing mills are readjusted and arranged at the original F1-F6 finishing mill positions, the roller way 100 is used for replacing the original F7 finishing mill positions, the height of the roller way 100 is adjusted to be consistent with the height of a rolling line, the finishing mill and the roller way 100 are fixed, the roller way 100 is arranged at one side of the F7 finishing mill positions and slides into the finishing mill positions through the slideways;

referring to fig. 1 and 4, the roller table 100 includes a support frame 110 disposed along a production line direction, a slider 111 is disposed at a bottom of the support frame 110 for sliding on a rail, the support frame 110 can be fixed on the ground, two sets of support rollers 120 are disposed on the support frame 110, a driving motor 121 is disposed at one side of the support rollers 120, the driving motor 121 drives the support rollers 120 to rotate, the driving motor 121 and its control device are disposed in a waterproof cover, a connecting frame 140 is disposed on the support frame 110, the connecting frame 140 is disposed between the two sets of support rollers 120, the connecting frame 140 is slidably connected with two sets of support shafts 143, the connecting frame 140 is provided with two sets of support shafts 143, two ends of the support shafts 143 are respectively slidably connected with the support shafts 143, a vertical sliding slot 141 is disposed on the connecting frame 140, the sliding slot 141 is slidably connected with two moving blocks 142, the two moving blocks 142 are respectively fixedly connected with the two sets of support shafts 143, a partition structure and a tension spring 144 are disposed between the two sets of support shafts 143, the spacing structure separates the supporting shafts 143 to form a gap between the supporting shafts 143 for facilitating extrusion of the blanks into the supporting shafts 130, the supporting shafts 143 are movably connected with the detecting cylinder 130, the elastic force of the tension springs 144 satisfies the pressure of the blanks driving the detecting cylinder 130 to rotate, thereby preventing the blanks from being scratched due to excessive pressure, the connecting frame 140 on at least one side is provided with a distance measuring device for detecting the gap between the two supporting shafts 143, in the patent, the distance between the two groups of supporting shafts 143 is indirectly calculated by detecting the distance between the two groups of moving blocks 142, and further the distance between the two groups of detecting cylinders 130 is calculated, namely the thickness of the rolled blanks, the measuring device can be a sliding resistor, a tension meter or other measuring devices, referring to fig. 5, at least one detecting cylinder 130 is provided with an angular velocity sensor 150 for detecting the rotating speed of the detecting cylinder 130, the linear velocity of the detecting cylinder 130 is directly measured or the linear velocity of the detecting cylinder 130 is calculated by the angular velocity, whether the differential speed exists is indirectly judged by comparing the rotating speed of the supporting roller 120, and when the differential speed exists, the rotating speed of the supporting roller 120 is adjusted to be consistent with the linear speed of the detection cylinder 130, namely the moving speed of the blank.

The distance measuring device is a grating 146, the grating 146 is arranged on the side wall of the sliding groove 141, a transmitter is arranged on one side, a receiver is arranged on the other side, and the distance between the two moving blocks 142 is measured through the shielding condition of the moving blocks 142 on the grating.

Referring to fig. 4, the partition structure is a T-shaped rod 149, the T-shaped rod 149 is located in the middle of the sliding groove 141 and is fixedly connected to the side wall of the sliding groove 141, both ends of the T-shaped rod 149 are threadedly connected with push rods for adjusting an initial gap, and both ends of the T-shaped rod 149 respectively push against two moving blocks 142.

Referring to fig. 5 and 6, the detecting cylinder 130 is located in the middle of the supporting shaft 143, sliding sleeves 131 are disposed on both sides of the detecting cylinder 130, two sets of sliding sleeves 131 may be disposed on the same supporting shaft 143, or may be disposed on two sets of supporting shafts 143, the sliding sleeves 131 may be axially adjusted with respect to the supporting shaft 143, the axial position of the sliding sleeves 131 is adjusted according to the width of the blank to make the sliding sleeves close to the edges of both sides of the blank, the sliding sleeves 131 are fixedly connected with connecting arms 132, contact wheels 133 are disposed on the connecting arms 132, torsion springs are disposed between the sliding sleeves 131 and the supporting shafts 143 to make the contact wheels 133 tightly adhere to the blank, a limiting structure is disposed between the sliding sleeves 131 and the supporting shafts 143 to make the connecting arms 132 form an included angle with the vertical direction, an angle detecting device is disposed on the sliding sleeves 131, and the thickness difference between both sides and the middle of the blank is determined by the rotation angle.

The sliding sleeve 131 is fixedly connected with a driven arm 134, the length of the driven arm 134 is larger than that of the connecting arm 132, the tail end of the driven arm 134 is connected with a displacement measuring structure 135, the displacement measuring structure 135 is used for detecting the movement amount of the driven arm 134, the displacement measuring structure 135 can be a device capable of detecting relative displacement, such as a sliding resistor, a tension meter, a grating ruler, an electromagnetic induction device and the like, the driven arm 134 and the displacement measuring structure 135 form an angle detecting device, the driven arm 134 amplifies the displacement amount of the contact wheel 133, the deflection angle of the sliding sleeve 131 is indirectly measured, and the measuring accuracy is improved.

Example two

Referring to fig. 7, the difference between the first embodiment and the second embodiment is that the separating structure is a pneumatic rod 145, two ends of the pneumatic rod 145 are respectively and fixedly connected to two moving blocks 142, the pneumatic rod 145 is communicated with a high-pressure gas source (the gas source and the connecting pipeline are not shown), at least one group of supporting shafts 143 is provided with a detecting device for detecting the arrival of the blank, the detecting device is close to the detecting cylinder 130, the detecting device may be a proximity switch and a photoelectric switch detecting device (not shown in fig. 7-8), the pneumatic rod 145 is in an extended state, when the detecting device detects the arrival of the blank, the pneumatic rod 145 is triggered to deflate and contract, and the two groups of supporting shafts 143 are close to each other to clamp the blank.

Referring to fig. 8, the pneumatic rod 145 is connected with a stop valve 147 and a pressure valve 148, the stop valve 147 and the pressure valve 148 are connected in series in the same air outlet, after the air release is triggered, the stop valve 147 is opened, the pressure valve 148 can be adjusted, so that a set air pressure exists in the pneumatic rod 145, when a thick blank is rolled, the set pressure in the pneumatic rod 145 counteracts the tension of a part of the tension spring 144, and the blank is prevented from being pressed too much to cause scratches.

The working principle and the working process of the invention are as follows:

when a certain finishing mill breaks down, the finishing mill is removed, the positions of the rest finishing mills are adjusted again and fixed, the roller way 100 is moved to an F7 finishing mill station, when a blank is rolled, the formed middle blank is moved onto the supporting roller 120, the supporting roller 120 rotates under the action of the driving motor 121, the blank drives the detection cylinder 130 to rotate when moving, the detection cylinder 130 keeps rotating at the same linear speed as the blank, when the rotation of the supporting roller 120 is asynchronous with the movement of the blank, the linear speeds of the detection cylinder 130 and the supporting roller 120 have a speed difference, and when the speed difference is detected, the rotating speed of the driving motor 121 is controlled again, so that the linear speed of the supporting roller 120 is consistent with the linear speed of the detection cylinder 130.

The two detection cylinders 130 clamp the blank, the thickness of the middle part of the blank can be measured by the gap between the two detection cylinders 130, and meanwhile, the contact wheel 133 changes the angle under the pressure of the blank, if the measured value of the displacement measuring structure 135 is smaller than the set value, namely, the rotation angle of the contact wheel 133 does not reach the standard, the thickness of the two sides of the blank is smaller than the thickness of the middle part, and meanwhile, the angle change of the connecting arm 132 and the gap change of the detection cylinders 130 also reflect the rolling uniformity degree in the production line direction.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A finishing mill group comprises a roller way (100) and at least two finishing mills, wherein the finishing mills are continuously arranged along a production line, the positions of the finishing mills can be adjusted, when any one finishing mill is damaged, the damaged finishing mill is removed, the position of the finishing mill is readjusted to vacate the position of the tail finishing mill, and the roller way (100) is used for filling the position of the tail finishing mill and supporting blanks;

the roller way (100) comprises two groups of supporting rollers (120), one side of each supporting roller (120) is provided with a driving motor (121), two groups of connecting frames (140) are arranged between the supporting rollers (120), each connecting frame (140) is slidably connected with two groups of supporting shafts (143), each group of supporting shafts (143) is provided with a separation structure and a tension spring (144), each separation structure is used for separating the corresponding supporting shaft (143) to enable a gap to be reserved between the supporting shafts (143) and the supporting rollers, each supporting shaft (143) is movably connected with a detection barrel (130), each connecting frame (140) on at least one side is provided with an interval measuring device, each interval measuring device is used for detecting the gap between the corresponding two supporting shafts (143), at least one interval measuring device is arranged on each detection barrel (130) and is provided with an angular velocity sensor (150) used for detecting the rotating speed of the detection barrel (130), whether a differential speed exists between the linear velocities of the detection barrel (130) and the supporting rollers (120) or not is judged, and when the differential speed exists, the rotational velocity of the supporting rollers (120) is adjusted to enable the rotating speed to be consistent with the linear velocity of the detection barrel (130).

2. A finishing block according to claim 1, characterized in that: the spacing measuring device is a grating (146).

3. A finishing block according to claim 1, characterized in that: the separating structure is a T-shaped rod (149), and the T-shaped rod (149) is fixedly arranged in the middle of the two groups of support shafts (143).

4. A finishing block according to claim 1, characterized in that: detect a section of thick bamboo (130) and be located the middle part of back shaft (143), the both sides of detecting a section of thick bamboo (130) all are equipped with sliding sleeve (131), sliding sleeve (131) can carry out the axial adjustment for back shaft (143), sliding sleeve (131) fixedly connected with linking arm (132), be equipped with contact wheel (133) on linking arm (132), it makes contact wheel (133) paste tight stock to be equipped with the torsional spring between sliding sleeve (131) and back shaft (143), be equipped with limit structure between sliding sleeve (131) and back shaft (143), make linking arm (132) and vertical direction have the contained angle, be equipped with angle detection device on sliding sleeve (131), judge the thickness difference of stock both sides and middle part through turned angle.

5. A finishing block according to claim 4, characterized in that: the angle detection device comprises a driven arm (134) fixedly connected with a sliding sleeve (131), the length of the driven arm (134) is larger than that of a connecting arm (132), a displacement measurement structure (135) is connected to the tail end of the driven arm (134), and the displacement measurement structure (135) is used for detecting the movement amount of the driven arm (134).

6. A finishing block according to claim 1, characterized in that: the structure of separating is pneumatic rod (145), the both ends of pneumatic rod (145) respectively with two back shaft (143) fixed connection, have at least a set of be used for being equipped with the detection device who detects the stock and arrive on back shaft (143), pneumatic rod (145) are in the extension state, work as detection device detects the stock and arrives when, triggers pneumatic rod (145) gassing shrink.

7. A finishing block according to claim 6, characterized in that: the pneumatic rod (145) is connected with a stop valve (147) and a pressure valve (148), and the stop valve (147) and the pressure valve (148) are connected in series in the same air outlet.