CN114473950B - Crank flying shear bearing bush replacement tool and on-line bearing bush replacement method - Google Patents
Crank flying shear bearing bush replacement tool and on-line bearing bush replacement method Download PDFInfo
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- CN114473950B CN114473950B CN202210339200.4A CN202210339200A CN114473950B CN 114473950 B CN114473950 B CN 114473950B CN 202210339200 A CN202210339200 A CN 202210339200A CN 114473950 B CN114473950 B CN 114473950B
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- crank
- bearing bush
- flying shear
- tool rest
- upper tool
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000008878 coupling Effects 0.000 claims abstract description 14
- 238000010168 coupling process Methods 0.000 claims abstract description 14
- 238000005859 coupling reaction Methods 0.000 claims abstract description 14
- 238000009826 distribution Methods 0.000 claims abstract description 7
- 238000005096 rolling process Methods 0.000 claims description 9
- 238000005520 cutting process Methods 0.000 claims description 8
- 210000004907 gland Anatomy 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automatic Assembly (AREA)
Abstract
The invention provides a tool for replacing a crank flying shear bearing bush and a method for replacing an online bearing bush, which relate to the technical field of replacing the crank flying shear bearing bush, and adopt the following scheme: including two relatively connected mounting, the mounting is arc structure, is provided with three at least fixed orifices along the circumference direction of mounting, and the axis of fixed orifice is parallel with the axis of mounting, two the mounting passes through the chain to be connected, the mounting is used for cooperating with the shaft coupling that corresponds on the flying shear, the fixed orifice is used for cooperating with the nut on the shaft coupling, the distribution of fixed orifice is unanimous with the distribution of the nut on the shaft coupling. The invention can realize the on-line dismounting of the bearing bush, has high efficiency, and realizes high self-locking safety through the crank flying shear bearing bush replacement tool.
Description
Technical Field
The invention relates to the technical field of replacing a crank flying shear bearing bush, in particular to a crank flying shear bearing bush replacing tool and an online bearing bush replacing method.
Background
In a hot rolling production line, a crank flying shear is a key device, plays a role in cutting the end of an intermediate billet, plays a vital role in the quality of strip steel, has a great influence on billet rolling due to the operation stability of the device, and is a key factor for guaranteeing the rolling threading stability of a rolling mill, and cutting the end is a key factor for guaranteeing the casting stability of the last rolling mill, and the device is influenced by the bearing bush precision in an upper tool rest and a lower tool rest, so that the bearing bush has a two-piece structure, the gap between the two bearing bushes is increased after the bearing bush is worn, the situation that the cutting end is continuous is generated, once the cutting end is unbroken, steel pile is easily generated after the device is brought into the rolling mill, the cutting end is unbroken, a roller is easily damaged after the device is brought into the rolling mill, and abnormal damage of the device is caused; the on-site maintenance and replacement process is to replace a new bearing bush after the cross beam and the upper tool rest are generally disassembled, so that the construction period is generally about 3 days, the on-site production continuity is greatly influenced, and the materials in the whole process are difficult to balance; in the prior art, when the axle bush is replaced, the crank is locked only through the transmission system in the flying shear, and the phenomenon that the crank rotates due to gravity still occurs, so that the safety is not high.
Therefore, aiming at the current situation in the prior art, the development of a crank flying shear bearing bush replacement tool and an online bearing bush replacement method is an urgent problem to be solved.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a crank flying shear bearing bush replacement tool and an online bearing bush replacement method, which can improve the safety of bearing bush replacement and improve the replacement efficiency.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a frock is changed to crank flying shear axle bush, includes two relative connection's mounting, the mounting is the arcuation structure, follows the circumference direction of mounting is provided with at least three fixed orifices, the axis of fixed orifices with the axis of mounting is parallel, two the mounting passes through the chain connection, the mounting is used for cooperating with the shaft coupling that corresponds on the flying shear, the fixed orifices is used for cooperating with the nut on the shaft coupling, the distribution of fixed orifices is unanimous with the distribution of the nut on the shaft coupling. Through the cooperation of the upper and lower couplers of the flying shear and the tool capable of replacing the bearing bush of the flying shear by the crank, the upper and lower cranks are interacted, self-locking is realized, and safety is improved.
Furthermore, the central angle a of the fixing piece is more than or equal to 90 degrees. The contact range with the coupler can be enlarged, and the reliability of the matched connection is improved.
Further, a length adjusting device is arranged on the chain. Can be adjusted and is convenient for installation.
Further, lifting lugs are arranged at the two ends of the fixing piece, and the two ends of the chain are correspondingly connected with the lifting lugs. The tool can be conveniently installed and detached.
Further, the shape of the fixing hole is matched with a nut on the coupler. Can be matched with the shape of the nut on the coupler, and the connection strength is improved.
Further, the fixing hole is provided with a fixing sleeve, the fixing sleeve is connected with the fixing hole through threads, and the shape of an inner hole of the fixing sleeve is matched with a nut on the coupler. The sleeve angle can be fixed according to the angle adjustment of nut, convenient cooperation.
The principle of the tool is as follows:
when the gland is removed, the crank is separated from the tool rest, the rotation of the crank is only controlled by the transmission system in the flying shear, and when the separated tool rest is lifted, the transmission system can not reliably limit the rotation of the crank due to the eccentric structure, and the crank can still rotate downwards, so that the bearing bush can not be detached and the production is safe; the upper crank and the lower crank are adjusted, so that the crank of the upper crank is at a high position, the crank of the lower crank is at a low position, the upper crank and the lower crank are connected through fixing pieces connected by two chains, the upper crank and the lower crank are respectively arranged on the upper coupling and the lower coupling, interaction force exists between the upper crank and the lower coupling, when the upper crank is about to rotate downwards, tension exists on the lower crank, the crank of the lower crank is subjected to self gravity action at the moment, the crank of the lower crank cannot rotate under the pulling of the upper crank, the rotation of the upper crank generates resistance, the upper crank cannot rotate, the upper crank is in a stress balance state, self-locking is realized, and safety is ensured.
The invention also provides an on-line bearing bush replacement method, which adopts the crank flying shear bearing bush replacement tool and comprises the following steps:
s01: drawing out the upper cutting edge;
s02: pushing the supporting device to the inside of the flying shear along the direction of the rolling line, and adjusting the height of the upper tool rest to enable the upper tool rest to be stably supported on the supporting device;
s03: the upper tool rest gland is disassembled by using the travelling crane, so that the linkage between the crank and the upper tool rest is disabled;
s04: connecting the travelling crane with an upper tool rest;
s05: the crane lifts the upper tool rest upwards, and the flying shear motor transmits electricity to enable the crank throw of the upper crank to rotate upwards until the upper tool rest moves to a horizontal position;
s06: the crane is lowered, the upper tool rest is rotated downwards to the position in S02, and is supported and fixed by the supporting device;
s07: the upper crank is continuously rotated until the upper bearing bush and the lower bearing bush are convenient to disassemble, and then the rotation is stopped;
s08: the lower crank is rotated to enable the crank throw to be located at the lowest position, and a crank flying shear bearing bush replacement tool is installed on an upper coupler and a lower coupler of the crank flying shear;
s09: disassembling an upper bearing bush and a lower bearing bush, and installing the lower bearing bush in an upper tool rest;
s10: the crane lifts the upper tool rest upwards to return to the horizontal position, the crank flying shear bearing bush replacement tool is disassembled, the flying shear motor transmits power, and the crank throw of the upper crank rotates to the assembly position with the upper tool rest;
s11: installing an upper bearing bush;
s12: installing a gland;
s13: removing the supporting device;
s14: the flying shear motor is electrified, and the upper crank and the lower crank are rotated to cut-off working positions.
Further, in S02, the supporting device includes a jack, a supporting block is disposed on a lifting rod of the jack, a clamping edge is disposed on an edge of the supporting ring, and the supporting block is clamped with the upper tool rest. Support reliability can be enhanced.
Further, in S07, the upper crank is rotated until the bell crank is positioned at a high position, and then the rotation is stopped. The upper bearing bush and the lower bearing bush can be conveniently detached and installed.
From the above technical scheme, the invention has the following advantages:
the scheme provides a crank flying shear bearing bush replacement tool and an on-line bearing bush replacement method, and the safety of a newly replaced bearing bush is improved through the crank flying shear bearing bush replacement tool; the angle of the sleeve can be adjusted through fixing the angle of the sleeve, so that the sleeve is convenient to install in a matched manner, and the anti-loosening device is convenient to install; the on-line bearing bush replacement method realizes on-line bearing bush disassembly and assembly, and improves efficiency.
Drawings
In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the description will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a fixing member according to a first embodiment of the present invention.
Fig. 2 is a schematic structural view of a fixing member according to a second embodiment of the present invention.
Fig. 3 is a schematic structural view of a supporting device according to an embodiment of the present invention.
Fig. 4 is an assembly diagram of a crank flying shear bushing replacement tool and a flying shear in an embodiment of the invention.
Fig. 5 is an assembly view of the upper tool carrier and the upper crank.
In the figure, 1, a fixing piece, 2, a fixing hole, 3, a lifting lug, 4, a connecting hole, 5, a fixing sleeve, 6, an electric hoist, 7, a coupling, 8, an upper crank end cover, 9, a lower crank end cover, 10, a chain, 11, a jack, 12, a supporting block, 13, a clamping edge, 14, a gland, 15 and an upper tool rest.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions of the present invention will be clearly and completely described below with reference to the drawings in this specific embodiment, and it is apparent that the embodiments described below are only some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, based on the embodiments in this patent, which would be within the purview of one of ordinary skill in the art without the particular effort to make the invention are intended to be within the scope of the patent protection.
Detailed description of the preferred embodiments
As shown in fig. 1, the invention provides a crank flying shear bearing bush replacement tool, which comprises two fixing pieces 1 which are oppositely arranged, wherein the fixing pieces 1 are of arc-shaped structures, the central angle a of the fixing pieces is more than or equal to 90 degrees, in the specific embodiment, the central angle is 90 degrees, at least three fixing holes 2 are arranged along the axial direction of the fixing pieces 1, the distribution of the fixing holes 2 is consistent with that of nuts on a coupler 7, 5 fixing holes 2 are arranged in the specific embodiment, the shape of each fixing hole 2 is in hexagonal fit with the nuts on the coupler 7, lifting lugs 3 are arranged at two ends of the fixing pieces 1, connecting holes 4 are arranged on the lifting lugs 3, two ends of a chain 10 are correspondingly connected with the lifting lugs 3, a length adjusting device is arranged on the chain 10, and can be conveniently adjusted by adopting a rope tightener and a winch and an electric hoist 6.
When the concrete implementation mode is installed, if the angle of the nut is not matched with the angle of the fixing hole 2, the nut on the coupler 7 can be rotated to be matched, and the nut is screwed after the bearing bush is replaced.
Detailed description of the preferred embodiments
As shown in fig. 2, this embodiment is basically the same as the first embodiment in structure, except that: the fixing sleeve 5 is arranged in the fixing hole 2, the fixing sleeve 5 is connected with the fixing hole 2 through threads, the shape of the inner hole of the fixing sleeve 5 is matched with a nut on the coupler 7, the nut on the coupler 7 does not need to be adjusted during installation, and the use is more convenient.
The mounting and dismounting method of the tool comprises the following steps:
s01: the flying shears are electrified, and the positions of the upper crank and the lower crank are adjusted, so that the crank throw of the upper crank is positioned at a high position and the crank throw of the lower crank is positioned at a low position;
s02: after adjustment, the power is cut off, the fixing piece 1 is arranged on the coupler 7, and the fixing sleeve 5 is rotated to enable the angle of the fixing sleeve to be consistent with that of the nut so as to be sleeved conveniently;
s03: the two fixing members 1 are connected by a chain 10;
s04: the tightness degree of the chains 10 is adjusted through the electric hoist 6, so that the two chains 10 are straightened;
s05: when the electric hoist is disassembled, the chain 10 is adjusted by the electric hoist 6 to lose the tension on the two fixing pieces 1;
s06: the fixture 1 is removed.
The invention also provides a method for replacing the bearing bush on line, which adopts the crank flying shear bearing bush replacing tool according to the first specific embodiment, and comprises the following specific steps:
s01: drawing out the upper cutting edge;
s02: pushing the supporting device to the inside of the flying shear along the direction of the rolling line, and adjusting the height of the upper tool rest 15 to ensure that the upper tool rest 15 is stably supported on the supporting device;
s03: the gland 14 of the upper tool rest 15 is disassembled by using the travelling crane, so that the linkage between the upper crank and the upper tool rest 15 is disabled;
s04: connecting the travelling crane with the upper tool rest 15;
s05: the crane lifts the upper tool rest 15 upwards, and simultaneously the flying shear motor transmits power to enable the crank throw of the upper crank to rotate to a high position until the upper tool rest 15 moves to a horizontal position;
s06: the crane is lowered, the upper tool rest 15 rotates downwards to the position in S02 and is supported and fixed by the supporting device;
s07: continuing to rotate the upper crank until the crank throw is positioned at the highest position;
s08: the lower crank is rotated to enable the crank throw to be located at the lowest position, and a crank flying shear bearing bush replacement tool is installed on an upper coupler 7 and a lower coupler 7 of the crank flying shear;
s09: the upper and lower bearing bushes are disassembled, and a new lower bearing bush is installed in the upper tool rest 15;
s10: the crane lifts the upper tool rest 15 upwards to return to the horizontal position, the crank flying shear bearing bush replacement tool is disassembled, the flying shear motor transmits power, and the crank throw of the upper crank rotates to the assembly position with the upper tool rest 15;
s11: installing a new upper bearing bush;
s12: mounting a gland 14;
s13: removing the supporting device and the travelling crane;
s14: the flying shear motor is electrified, and the upper and lower tool rests are adjusted to cut-off working positions.
As shown in fig. 3, the supporting device used in S02 includes a jack 11, a supporting block 12 is disposed on a lifting rod of the jack 11, a clamping edge 13 is disposed at an edge of a supporting ring, and the supporting block 12 is clamped with an upper tool rest 15.
When the upper crank is in a high position, the distance between the upper crank and the upper tool rest in the horizontal direction is 30mm, so that the disassembly and installation space of the lower bearing bush can be ensured.
From the above detailed description, it can be seen that the present invention has the following advantages:
1. the safety of the newly replaced bearing bush is improved through a crank flying shear bearing bush replacement tool;
2. the angle can be adjusted by fixing the angle of the sleeve 5, so that the installation is convenient in a matched manner;
3. the anti-loosening and convenient installation are realized through the length adjusting device;
4. the on-line bearing bush replacement method realizes on-line bearing bush disassembly and assembly, and improves efficiency.
The terms "upper," "lower," "outboard," "inboard," and the like in the description and in the claims of the invention and in the above figures, if any, are used for distinguishing between relative relationships in position and not necessarily for giving qualitative sense. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. The utility model provides a frock is changed to crank flying shear axle bush, its characterized in that includes two relative fixed parts (1) that connect, fixed part (1) are the arcuation structure, follow the circumferencial direction of fixed part (1) is provided with at least three fixed orifices (2), the axis of fixed orifices (2) with the axis of fixed part (1) is parallel, two fixed part (1) are connected through chain (10), fixed part (1) are used for cooperating with shaft coupling (7) that correspond on the flying shear, fixed orifices (2) are used for cooperating with the nut on shaft coupling (7), the distribution of fixed orifices (2) is unanimous with the distribution of the nut on shaft coupling (7), be provided with length adjustment device on chain (10).
2. A crank flying shear bushing changing fixture according to claim 1, characterized in that the central angle a of the fixing member (1) is not less than 90 °.
3. The crank flying shear bush replacement tool according to claim 2, wherein lifting lugs (3) are arranged at two ends of the fixing piece (1), and two ends of the chain (10) are correspondingly connected with the lifting lugs (3).
4. A crank flying shear bushing changing fixture according to claim 3, characterized in that the shape of the fixing hole (2) is adapted to the nut on the coupling (7).
5. A crank flying shear bushing changing tool as claimed in claim 3, characterized in that the fixing hole (2) is provided with a fixing sleeve (5), the fixing sleeve (5) is connected with the fixing hole (2) through threads, and the shape of the inner hole of the fixing sleeve (5) is matched with a nut on the coupler (7).
6. An on-line bearing bush replacement method, which is characterized by adopting the crank flying shear bearing bush replacement tool as claimed in claim 4 or claim 5, and comprising the following steps:
s01: drawing out the upper cutting edge;
s02: pushing the supporting device to the inside of the flying shear along the direction of the rolling line, and adjusting the height of the upper tool rest so that the upper tool rest is stably supported on the supporting device;
s03: the upper tool rest gland is disassembled by using the travelling crane, so that the linkage between the crank and the upper tool rest is disabled;
s04: connecting the travelling crane with an upper tool rest;
s05: the crane lifts the upper tool rest upwards, and the flying shear motor transmits electricity to enable the crank throw of the upper crank to rotate upwards until the upper tool rest moves to a horizontal position;
s06: the crane is lowered, the upper tool rest is rotated downwards to the position in S02, and is supported and fixed by the supporting device;
s07: the upper crank is continuously rotated until the upper bearing bush and the lower bearing bush are convenient to disassemble, and then the rotation is stopped;
s08: the lower crank is rotated to enable the crank throw to be located at the lowest position, and a crank flying shear bearing bush replacement tool is installed on an upper coupler and a lower coupler of the crank flying shear;
s09: disassembling an upper bearing bush and a lower bearing bush, and installing the lower bearing bush in an upper tool rest;
s10: the crane lifts the upper tool rest upwards to return to the horizontal position, the crank flying shear bearing bush replacement tool is disassembled, the flying shear motor transmits power, and the crank throw of the upper crank rotates to the assembly position with the upper tool rest;
s11: installing an upper bearing bush;
s12: installing a gland;
s13: removing the supporting device;
s14: the flying shear motor is electrified, and the upper crank and the lower crank are rotated to cut-off working positions.
7. The on-line bearing bush replacement method according to claim 6, wherein the supporting device in S02 comprises a jack (11), a supporting block (12) is arranged on a lifting rod of the jack (11), a clamping edge (13) is arranged at the edge of the supporting block (12), and the supporting block (12) is clamped with an upper tool rest (15).
8. An on-line bearing shell replacement method according to claim 6, characterized in that the distance in the horizontal direction between the upper crank and the upper tool carrier (15) is 30mm when the upper crank is in the high position.
9. The method for replacing an on-line bearing bush according to claim 6, wherein in S07, the rotation is stopped after the upper crank is rotated until the bell crank is positioned at a high position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210339200.4A CN114473950B (en) | 2022-04-01 | 2022-04-01 | Crank flying shear bearing bush replacement tool and on-line bearing bush replacement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210339200.4A CN114473950B (en) | 2022-04-01 | 2022-04-01 | Crank flying shear bearing bush replacement tool and on-line bearing bush replacement method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114473950A CN114473950A (en) | 2022-05-13 |
| CN114473950B true CN114473950B (en) | 2023-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210339200.4A Active CN114473950B (en) | 2022-04-01 | 2022-04-01 | Crank flying shear bearing bush replacement tool and on-line bearing bush replacement method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114473950B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11151612A (en) * | 1997-11-21 | 1999-06-08 | Kawasaki Steel Corp | Flywheel attaching and detaching control method and device of flying shear |
| CN101664869A (en) * | 2009-09-30 | 2010-03-10 | 北京京诚瑞信长材工程技术有限公司 | Blade carrier replacing device of combined flying shear |
| CN101832043A (en) * | 2009-03-09 | 2010-09-15 | 张旭 | Vertical rotary type three-dimensional garage with automatic anti-swinging hanging vehicle loading platforms |
| CN108000424A (en) * | 2016-10-31 | 2018-05-08 | 北京京诚瑞信长材工程技术有限公司 | A kind of assembly method of flying crank shears crank |
| CN207701639U (en) * | 2017-12-19 | 2018-08-07 | 李浩然 | A kind of dynamic balance wear-resistant structure of retarder crank throw locking states |
-
2022
- 2022-04-01 CN CN202210339200.4A patent/CN114473950B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11151612A (en) * | 1997-11-21 | 1999-06-08 | Kawasaki Steel Corp | Flywheel attaching and detaching control method and device of flying shear |
| CN101832043A (en) * | 2009-03-09 | 2010-09-15 | 张旭 | Vertical rotary type three-dimensional garage with automatic anti-swinging hanging vehicle loading platforms |
| CN101664869A (en) * | 2009-09-30 | 2010-03-10 | 北京京诚瑞信长材工程技术有限公司 | Blade carrier replacing device of combined flying shear |
| CN108000424A (en) * | 2016-10-31 | 2018-05-08 | 北京京诚瑞信长材工程技术有限公司 | A kind of assembly method of flying crank shears crank |
| CN207701639U (en) * | 2017-12-19 | 2018-08-07 | 李浩然 | A kind of dynamic balance wear-resistant structure of retarder crank throw locking states |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114473950A (en) | 2022-05-13 |
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