CN111482663A - High-precision high-efficiency fixed-length shearing control method and device for bar - Google Patents
High-precision high-efficiency fixed-length shearing control method and device for bar Download PDFInfo
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- CN111482663A CN111482663A CN202010456261.XA CN202010456261A CN111482663A CN 111482663 A CN111482663 A CN 111482663A CN 202010456261 A CN202010456261 A CN 202010456261A CN 111482663 A CN111482663 A CN 111482663A
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- material baffle
- shearing device
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- 238000010008 shearing Methods 0.000 title claims abstract description 234
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 65
- 230000008569 process Effects 0.000 claims abstract description 5
- 230000007246 mechanism Effects 0.000 claims description 29
- 238000005520 cutting process Methods 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000000903 blocking effect Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D79/00—Methods, machines, or devices not covered elsewhere, for working metal by removal of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/08—Protective coverings for parts of machine tools; Splash guards
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/12—Arrangements for cooling or lubricating parts of the machine
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/22—Feeding members carrying tools or work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q7/00—Arrangements for handling work specially combined with or arranged in, or specially adapted for use in connection with, machine tools, e.g. for conveying, loading, positioning, discharging, sorting
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Accessories And Tools For Shearing Machines (AREA)
Abstract
The invention relates to the technical field of bar production, in particular to a high-precision high-efficiency fixed-length shearing control method and device for bars, which comprises the following process flows: a first shearing device and a second shearing device are arranged above the bar conveying track, and the distance between the shearing tools of the first shearing device and the second shearing device is set to be 9.02-9.03 m; the first material baffle plate and the second material baffle plate are hinged in front of the first shearing device and the second shearing device, touch switches are respectively installed on the two material baffle plates, the distance between the first material baffle plate and the shearing tool of the second shearing device is set to be 9.02-9.03 m, and the distance between the second material baffle plate and the shearing tool of the second shearing device is set to be 12.02-12.04 m. The method and the device provided by the invention have higher fixed-length shearing precision and efficiency, and effectively reduce the production cost of enterprises.
Description
Technical Field
The invention relates to the technical field of bar production, in particular to a high-precision high-efficiency fixed-length shearing control method and device for bars.
Background
After the bar is rolled, the bar needs to be cut to length after being cooled by a cooling bed. The common bar shearing length is divided into two specifications of 9 meters and 12 meters, the traditional fixed-length shearing method is that two sets of shearing devices are arranged on a conveying track, each set of shearing device is matched with one striker plate, the distance between one striker plate and a shearing cutter of the corresponding shearing device is 9 meters, and the distance between the other striker plate and a shearing cutter of the corresponding shearing device is 12 meters, so that the cutting of bars with two different specifications is respectively completed. According to the control method, the temperature of the bar after being cooled by the cooling bed is 150-200 ℃, the bar can be shortened after being cooled to the room temperature, when the shearing length is controlled to be just 9 meters or 12 meters, the bar can possibly exceed the range (specification size + 0-0.05 m) specified by the standard after being cooled to the room temperature, and when the bar of 9 meters is sheared, the shearing device and the material baffle plate of 12 meters do not work, so that the shearing efficiency is low.
Disclosure of Invention
The invention aims to solve the technical problem of providing a high-precision and high-efficiency fixed-length shearing control method and device for bars, which have high fixed-length precision and high shearing efficiency.
The invention is realized by the following technical scheme:
a high-precision high-efficiency fixed-length shearing control method for bars comprises the following process flows:
a first shearing device and a second shearing device are arranged above the bar conveying track, and the distance between the shearing tools of the first shearing device and the second shearing device is set to be 9.02-9.03 m;
a first material baffle plate and a second material baffle plate are hinged in front of the first shearing device and the second shearing device, touch switches are respectively installed on the two material baffle plates, the distance between the first material baffle plate and the shearing tool of the second shearing device is set to be 9.02-9.03 m, and the distance between the second material baffle plate and the shearing tool of the second shearing device is set to be 12.02-12.04 m.
Optimally, the distance between the first shearing device and the shearing tool of the second shearing device is set to be 9.02, the distance between the first material baffle plate and the shearing tool of the second shearing device is set to be 9.02m, and the distance between the second material baffle plate and the shearing tool of the second shearing device is set to be 12.02 m.
Optimally, the distance between the first shearing device and the shearing tool of the second shearing device is set to be 9.03, the distance between the first material baffle plate and the shearing tool of the second shearing device is set to be 9.03m, and the distance between the second material baffle plate and the shearing tool of the second shearing device is set to be 12.04 m.
The utility model provides a bar high accuracy high efficiency scale shearing mechanism, it is including carrying the frame, installing a plurality of rod conveying rollers, first shearing mechanism, second shearing mechanism, first striker plate and second striker plate in carrying the frame, and second shearing mechanism is located the place ahead of first shearing mechanism and includes support frame, shearing mounting bracket and shearing cutter respectively, support frame fixed mounting is in carrying the frame, and the shearing mounting bracket cylinder drive up-and-down motion on the support frame is passed through fixed mounting to the shearing mounting bracket, and fixed mounting has the shearing cylinder on the shearing mounting bracket, and the piston rod tip and the shearing cutter fixed connection of shearing cylinder, first striker plate and second striker plate hinge dress respectively on carrying the frame, and be located the place ahead of second shearing mechanism respectively, and the second striker plate is located the place ahead of first striker plate, and the distance between the shearing cutter of second shearing mechanism equals the shearing cutter of first shearing mechanism and the sword of second shearing mechanism With the distance between them being greater than the length of the bar to be cut.
Further, a touch switch is fixedly mounted on the first material baffle plate and the second material baffle plate respectively.
Further, a material pressing roller is fixedly installed on the shearing installation frame.
Furthermore, a guide rail is fixedly installed on the support frame, and the shearing installation frame is clamped on the guide rail through a sliding block.
Advantageous effects of the invention
According to the bar high-precision high-efficiency fixed-length shearing control method and device, the distance between the shearing cutters of the first shearing device and the second shearing device is set to be 9.02-9.03 m; the distance between the first material baffle plate and the shearing tool of the second shearing device is set to be 9.02-9.03 m, the distance between the second material baffle plate and the shearing tool of the second shearing device is set to be 12.02-12.04 m, the length of the rod after being sheared is controlled to be 9.02-9.03 m or 12.02-12.04 m, when the rod is cooled to room temperature, the length is just 9m or 12m, the sizing precision is high, the standard requirement is met, and the production cost of enterprises can be reasonably controlled.
Meanwhile, a first material baffle and a second material baffle are hinged in front of the first shearing device and the second shearing device, but a material baffle matched with one shearing device is not provided, the distance between the first material baffle and a shearing cutter of the second shearing device is set to be 9.02-9.03 m, the distance between the second material baffle and the shearing cutter of the second shearing device is set to be 12.02-12.04 m, when a bar with the specification of 12m is sheared, the first shearing device does not work, the first material baffle is in a put-down state, the second material baffle is in a material blocking state, the bar runs to the second material baffle to trigger a touch switch, a conveying roller of a bar conveying track stops feeding, and a shearing cutter of the second shearing device runs to cut off the bar. When shearing the rod of 9 meters specification, the second striker plate is in the state of putting down, and first striker plate is in the material blocking state, and the rod moves first striker plate department and triggers the switch that touches, and orbital conveying roller of rod transport stops the pay-off, and the shearing cutter of first shearing mechanism and the shearing cutter of second shearing mechanism operate simultaneously and cut off the rod, can accomplish the shearing of two sections rods simultaneously, have improved the utilization ratio of equipment, and the shear efficiency ratio of scale is higher.
Drawings
FIG. 1 is a schematic front view of the present invention;
in the figure, 1, a conveying rack, 2, a bar conveying roller, 3, a nip roll, 4, a shearing cutter, 5, a guide rail, 6, a shearing mounting rack, 7, a shearing mounting rack cylinder, 8, a second shearing device, 9, a first shearing device, 10, a second material baffle, 11, a first material baffle, 12, a touch switch, 13, a supporting frame and 14, the shearing cylinder are arranged.
Detailed Description
A high-precision high-efficiency fixed-length shearing control method for bars comprises the following process flows:
a first shearing device and a second shearing device are arranged above the bar conveying track, and the distance between the shearing tools of the first shearing device and the second shearing device is set to be 9.02-9.03 m;
a first material baffle plate and a second material baffle plate are hinged in front of the first shearing device and the second shearing device, touch switches are respectively installed on the two material baffle plates, the distance between the first material baffle plate and the shearing tool of the second shearing device is set to be 9.02-9.03 m, and the distance between the second material baffle plate and the shearing tool of the second shearing device is set to be 12.02-12.04 m.
Optimally, the distance between the first shearing device and the shearing tool of the second shearing device is set to be 9.02, the distance between the first material baffle plate and the shearing tool of the second shearing device is set to be 9.02m, and the distance between the second material baffle plate and the shearing tool of the second shearing device is set to be 12.02 m. The scale precision is higher, and can more effectual control the cost of enterprise.
Optimally, the distance between the first shearing device and the shearing tool of the second shearing device is set to be 9.03, the distance between the first material baffle plate and the shearing tool of the second shearing device is set to be 9.03m, and the distance between the second material baffle plate and the shearing tool of the second shearing device is set to be 12.04 m. The fixed length precision of the bar can be effectively ensured to meet the standard requirement.
The utility model provides a bar high accuracy high efficiency scale shearing mechanism, it is including carrying frame 1, installing a plurality of rod conveying rollers 2, first shearing mechanism 9, second shearing mechanism 8, first striker plate 11 and second striker plate 10 in carrying the frame, and second shearing mechanism is located the place ahead of first shearing mechanism and includes support frame 13, shearing mounting bracket 6 and shearing cutter 4 respectively, support frame fixed mounting is in carrying the frame, and the shearing mounting bracket passes through the shearing mounting bracket cylinder 7 drive up-and-down motion of fixed mounting on the support frame, and fixed mounting has shearing cylinder 14 on the shearing mounting bracket, and the tailpiece of the piston rod portion and the shearing cutter fixed connection of shearing cylinder, first striker plate and second striker plate articulate respectively on carrying the frame, and are located the place ahead of second shearing mechanism respectively, and the second striker plate is located the place ahead of first striker plate, and the distance between the shearing cutter of second shearing mechanism equals the shearing cutter of first shearing mechanism The distance between the cutting knife and the second cutting device is larger than the length of the required cutting bar.
Further, on first striker plate and the second striker plate respectively fixed mounting touch switch 12, the control end and the controller input end that touch the switch pass through the cable and are connected, the output of controller respectively with rod conveying roller motor, the shearing mounting bracket cylinder, the shearing cylinder passes through the cable and is connected, move first striker plate or second striker plate department when the rod and touch the switch, controller control rod conveying roller motor stall, the rod stops conveying, then control shearing mounting bracket cylinder and shearing cylinder action, accomplish the shearing of rod, make whole scale shearing process realize automated control, further improve production efficiency.
Further, fixed mounting has nip roll 3 on the shearing mounting bracket, and after controller control rod conveying roller motor shut down, shearing mounting bracket cylinder drive shearing mounting bracket downstream, the nip roll compresses tightly the material earlier, and shearing cylinder drives again and cuts steel to the downstream of shearing cutter, prevents that steel from taking place to roll or perk in cutting process.
Further, a guide rail 5 is fixedly installed on the support frame, and the shearing installation frame is clamped on the guide rail through a sliding block. The operation of the cutting tool and the material pressing roller is more stable and reliable.
When the bar is cooled by the cooling bed after being rolled, and needs to be cut to length, the bar moves to the length-fixed cutting device through the bar conveying track, and the distance between the first cutting device and the cutting tool of the second cutting device is set to be 9.02-9.03 m; the distance between the first material baffle plate and the shearing tool of the second shearing device is set to be 9.02-9.03 m, the distance between the second material baffle plate and the shearing tool of the second shearing device is set to be 12.02-12.04 m, the length of the rod after being sheared is controlled to be 9.02-9.03 m or 12.02-12.04 m, when the rod is cooled to room temperature, the length is just 9m or 12m, the sizing precision is high, the standard requirement is met, and the production cost of enterprises can be reasonably controlled.
Meanwhile, the first material baffle and the second material baffle are hinged in front of the first shearing device and the second shearing device, but a set of shearing device is not matched with one material baffle, the distance between the first material baffle and a shearing cutter of the second shearing device is set to be 9.02-9.03 m, the distance between the second material baffle and a shearing cutter of the second shearing device is set to be 12.02-12.04 m, when a 12-meter rod is sheared, the first shearing device does not work, the first material baffle is in a put-down state, the second material baffle is in a material blocking state, the rod runs to the second material baffle and touches a trigger switch, a conveying roller of a rod conveying track stops feeding, and a shearing cutter of the second shearing device runs to cut the rod. When shearing the rod of 9 meters specification, the second striker plate is in the state of putting down, and first striker plate is in the material blocking state, and the rod moves first striker plate department and triggers the switch that touches, and orbital conveying roller of rod transport stops the pay-off, and the shearing cutter of first shearing mechanism and the shearing cutter of second shearing mechanism operate simultaneously and cut off the rod, can accomplish the shearing of two sections rods simultaneously, have improved the utilization ratio of equipment, and the shear efficiency ratio of scale is higher.
In conclusion, the rod high-precision high-efficiency fixed-length shearing control method protected by the invention has higher fixed-length shearing precision and efficiency, and effectively reduces the production cost of enterprises.
Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A high-precision high-efficiency fixed-length shearing control method for bars is characterized by comprising the following process flows of:
a first shearing device and a second shearing device are arranged above the bar conveying track, and the distance between the shearing tools of the first shearing device and the second shearing device is set to be 9.02-9.03 m;
a first material baffle plate and a second material baffle plate are hinged in front of the first shearing device and the second shearing device, touch switches are respectively installed on the two material baffle plates, the distance between the first material baffle plate and the shearing tool of the second shearing device is set to be 9.02-9.03 m, and the distance between the second material baffle plate and the shearing tool of the second shearing device is set to be 12.02-12.04 m.
2. The method for controlling the high-precision and high-efficiency cut-to-length shearing of the bar according to claim 1, wherein the distance between the shearing tools of the first shearing device and the second shearing device is set to be 9.02m, the distance between the shearing tools of the first material baffle and the second shearing device is set to be 9.02m, and the distance between the shearing tools of the second material baffle and the second shearing device is set to be 12.02 m.
3. The method for controlling the high-precision and high-efficiency cut-to-length shearing of the bar according to claim 1, wherein the distance between the first shearing device and the shearing tool of the second shearing device is set to be 9.03, the distance between the first striker plate and the shearing tool of the second shearing device is set to be 9.03m, and the distance between the second striker plate and the shearing tool of the second shearing device is set to be 12.04 m.
4. The utility model provides a bar high accuracy high efficiency scale shearing mechanism, a serial communication port, including carrying the frame, installing a plurality of rod conveying rollers, first shearing mechanism, second shearing mechanism, first striker plate and second striker plate in carrying the frame, second shearing mechanism is located the place ahead of first shearing mechanism and includes support frame, shearing mounting bracket and shearing cutter respectively, support frame fixed mounting is in carrying the frame, and the shearing mounting bracket passes through the shearing mounting bracket cylinder drive up-and-down motion of fixed mounting on the support frame, and fixed mounting has the shearing cylinder on the shearing mounting bracket, cuts the tailpiece of the piston rod portion and the shearing cutter fixed connection of cylinder, first striker plate and second striker plate hinge dress respectively in carrying the frame, and be located the place ahead of second shearing mechanism respectively, and the second striker plate is located the place ahead of first striker plate, and the distance between the shearing cutter of second shearing mechanism equals shearing cutter and the second of first shearing mechanism and cuts the cutter The distance between the cutting tools of the cutting device is larger than the length of the bar to be cut.
5. The high-precision high-efficiency fixed-length shearing device for the bars as claimed in claim 4, wherein the first material baffle plate and the second material baffle plate are respectively and fixedly provided with a touch switch.
6. The high-precision high-efficiency fixed-length shearing device for the bar material as claimed in claim 4, wherein a nip roll is fixedly arranged on the shearing mounting frame.
7. The high-precision high-efficiency fixed-length shearing device for the bars as claimed in claim 4, wherein a guide rail is fixedly arranged on the supporting frame, and the shearing mounting frame is clamped on the guide rail through a sliding block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010456261.XA CN111482663A (en) | 2020-05-26 | 2020-05-26 | High-precision high-efficiency fixed-length shearing control method and device for bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010456261.XA CN111482663A (en) | 2020-05-26 | 2020-05-26 | High-precision high-efficiency fixed-length shearing control method and device for bar |
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| Publication Number | Publication Date |
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| CN111482663A true CN111482663A (en) | 2020-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010456261.XA Pending CN111482663A (en) | 2020-05-26 | 2020-05-26 | High-precision high-efficiency fixed-length shearing control method and device for bar |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114798744A (en) * | 2022-05-20 | 2022-07-29 | 宝武集团鄂城钢铁有限公司 | Rod double-collection rear-end collision prevention system and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2574689A1 (en) * | 1984-12-13 | 1986-06-20 | Ind Metallurg Fses | Method and device for obtaining billets by shearing bars of steel or the like as they move past |
| CN202052984U (en) * | 2011-03-25 | 2011-11-30 | 通化钢铁股份有限公司 | Length fixing baffle plate device for shearing bars |
| CN209830425U (en) * | 2019-04-12 | 2019-12-24 | 青岛堡鑫机械有限公司 | Shearing machine for shearing top plate of transformer |
| CN212682674U (en) * | 2020-05-26 | 2021-03-12 | 盐城市联鑫钢铁有限公司 | Bar high-precision high-efficiency fixed-length shearing device |
-
2020
- 2020-05-26 CN CN202010456261.XA patent/CN111482663A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2574689A1 (en) * | 1984-12-13 | 1986-06-20 | Ind Metallurg Fses | Method and device for obtaining billets by shearing bars of steel or the like as they move past |
| CN202052984U (en) * | 2011-03-25 | 2011-11-30 | 通化钢铁股份有限公司 | Length fixing baffle plate device for shearing bars |
| CN209830425U (en) * | 2019-04-12 | 2019-12-24 | 青岛堡鑫机械有限公司 | Shearing machine for shearing top plate of transformer |
| CN212682674U (en) * | 2020-05-26 | 2021-03-12 | 盐城市联鑫钢铁有限公司 | Bar high-precision high-efficiency fixed-length shearing device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114798744A (en) * | 2022-05-20 | 2022-07-29 | 宝武集团鄂城钢铁有限公司 | Rod double-collection rear-end collision prevention system and method |
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