CN111451715A - Pin shaft dismounting tool and method - Google Patents
Pin shaft dismounting tool and method Download PDFInfo
- Publication number
- CN111451715A CN111451715A CN202010305725.7A CN202010305725A CN111451715A CN 111451715 A CN111451715 A CN 111451715A CN 202010305725 A CN202010305725 A CN 202010305725A CN 111451715 A CN111451715 A CN 111451715A
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- pin shaft
- liquid nitrogen
- jack
- elbow
- disassembling
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- 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
- B23P11/00—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for
- B23P11/02—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits
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- 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
- B23P11/00—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for
- B23P11/02—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits
- B23P11/025—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits by using heat or cold
-
- 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
- B23P19/02—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 connecting objects by press fit or for detaching same
-
- 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
- B23P19/02—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 connecting objects by press fit or for detaching same
- B23P19/027—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 connecting objects by press fit or for detaching same using hydraulic or pneumatic means
Abstract
The invention discloses a pin shaft dismounting tool, which comprises: a liquid nitrogen tank for storing liquid nitrogen; the liquid nitrogen pump is connected with the liquid nitrogen tank and used for pumping out liquid nitrogen in the liquid nitrogen tank and conveying the liquid nitrogen to the central hole in the pin shaft; and the jack is used for ejecting the pin shaft when the pin shaft reaches the preset cold shrinkage amount. The invention also discloses a method applied to the pin shaft dismounting tool. The pin shaft dismounting tool achieves the purpose of dismounting the pin shaft in a protective way by liquid nitrogen cooling, can avoid destructively cutting off the pin shaft, so that the form and position tolerance of the pin shaft and the support hole is not damaged, can prolong the service life of the support and the pin shaft, and can avoid replacing the support for 1 time in 2-3 years or processing a support hole shaft sleeve on line; meanwhile, the tool can shorten the maintenance time and save labor, so that the working efficiency can be improved and the production cost can be reduced. The pin shaft disassembling tool and the pin shaft disassembling method have popularization value and obvious economic benefit and social benefit.
Description
Technical Field
The invention relates to the technical field of hot rolling processing, in particular to a pin shaft dismounting tool. The invention also relates to a method applied to the pin shaft disassembling tool.
Background
The hot rolling heating furnace walking beam horizontal hydraulic cylinder is of a tail end hinged structure and is used for driving the horizontal moving frame to move along the horizontal direction. The single-seat heating furnace is evenly provided with 25 steel blocks, a single plate blank weighs 20-38.1t, and the translation hydraulic cylinder can push the 500-952.5t plate blank and the 82.922t translation frame to move forwards or backwards along the horizontal direction.
The pin shaft is matched with the hydraulic cylinder knuckle bearing, and the pin shaft is in interference fit with the knuckle bearing, wherein the maximum interference is 0.014 mm. Due to the complex environment of the furnace bottom of the heating furnace and the action of long-time heavy load, the surface of the pin shaft can generate local plastic deformation and oxidation corrosion, so that the pin shaft is very difficult to disassemble. In the prior art, one door-shaped frame is required to be welded on one side of a pin shaft support seat each time the hydraulic cylinder is replaced, and then a 100t jack is used for ejecting a pin shaft, so that the replacement process is time-consuming and labor-consuming; if the jack is not moved, the cutting can be carried out only by adopting a flame cutting method, and the cutting difficulty is high and the time and the labor are wasted as the length of the pin shaft reaches 515 mm. During on-site actual installation, the pin shaft is required to be ground to be about 0.1mm, however, in the using process, the support hole is ground to be large due to clearance shaking, so that the pin shaft is easy to separate, and the service life of the pin shaft and the support is shortened. Therefore, the dismounting mode of the pin shaft cannot meet the current maintenance period and quality requirements.
Therefore, how to avoid the technical problem that the maintenance and quality requirements cannot be met due to time and labor waste in the disassembly and assembly of the existing pin shaft is needed to be solved by technical personnel in the field at present.
Disclosure of Invention
The invention aims to provide a pin shaft dismounting tool which can shorten the maintenance time, can protectively dismount a pin shaft and prolong the service life of a support and the pin shaft. The invention further aims to provide a method applied to the pin shaft disassembling tool.
In order to achieve the above object, the present invention provides a pin shaft dismounting tool, including:
a liquid nitrogen tank for storing liquid nitrogen;
the liquid nitrogen pump is connected with the liquid nitrogen tank and used for pumping out liquid nitrogen in the liquid nitrogen tank and conveying the liquid nitrogen to the central hole in the pin shaft;
and the jack is used for ejecting the pin shaft when the pin shaft reaches the preset cold shrinkage amount.
Optionally, the liquid nitrogen drainage device further comprises two elbows which are respectively connected with two ends of the pin shaft and can drain liquid nitrogen to the central hole inside the pin shaft.
Optionally, any one of the elbows is connected to the liquid nitrogen tank through a connecting hose.
Optionally, any of the elbows comprises:
the threaded connection section is used for being connected with a threaded hole at the end part of the pin shaft;
a hose connecting section perpendicular to and connected to the threaded connecting section;
the through hole is formed in the threaded connection section and the hose connection section and is used for being communicated with the central hole in the pin shaft.
Optionally, the liquid nitrogen pump is specifically a pedal self-pressurizing liquid nitrogen pump.
Optionally, the support stool is used for contacting and abutting against the end part of the pin shaft and can protect the elbow.
Optionally, a rectangular groove for accommodating the elbow is formed in the supporting stool.
The invention also provides a pin shaft dismounting method, which comprises the following steps:
positioning the jack through the portal frame and the supporting stool;
applying preset pressure to the pin shaft through the jack;
pumping liquid nitrogen in the liquid nitrogen tank by a liquid nitrogen pump and conveying the liquid nitrogen into a central hole in the pin shaft through a connecting hose and an elbow;
and ejecting the pin shaft out through the jack when the pin shaft reaches a preset cold shrinkage amount.
Compared with the background art, the invention designs the pin shaft dismounting tool aiming at different requirements of pin shaft dismounting, and particularly the pin shaft dismounting tool comprises a liquid nitrogen tank, a liquid nitrogen pump and a jack, wherein the liquid nitrogen tank is used for storing liquid nitrogen; the liquid nitrogen pump is connected with the liquid nitrogen tank and used for pumping out liquid nitrogen in the liquid nitrogen tank and conveying the liquid nitrogen to the central hole in the pin shaft; and when the pin shaft reaches the preset cold shrinkage amount, the jack is used for ejecting the pin shaft. Meanwhile, the invention also provides a method applied to the pin shaft dismounting tool, which comprises the following steps: s1: positioning the jack through the portal frame and the supporting stool; s2: applying preset pressure to the pin shaft through the jack; s3: pumping liquid nitrogen in the liquid nitrogen tank by a liquid nitrogen pump and conveying the liquid nitrogen into a central hole in the pin shaft through a connecting hose and an elbow; s4: and ejecting the pin shaft out through a jack when the pin shaft reaches a preset cold shrinkage amount.
Therefore, the pin shaft dismounting tool and the pin shaft dismounting method achieve the aim of protectively dismounting the pin shaft in a liquid nitrogen cooling mode, the tool can avoid destructively cutting off the pin shaft, so that the form and position tolerance of the pin shaft and the support hole is not damaged, the service lives of the support and the pin shaft can be prolonged, and the support can be prevented from being replaced for 1 time in 2-3 years or a support hole shaft sleeve is prevented from being processed online; meanwhile, the tool can shorten the maintenance time and save labor, so that the working efficiency can be improved and the production cost can be reduced. The pin shaft disassembling tool and the pin shaft disassembling method have popularization value and obvious economic benefit and social benefit.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic view of a pin dismounting tool for dismounting a pin according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of the first elbow of FIG. 1;
FIG. 3 is a top view of FIG. 2;
FIG. 4 is a schematic structural view of the second elbow of FIG. 1;
FIG. 5 is a top view of FIG. 4;
FIG. 6 is a schematic structural view of the pin shaft of FIG. 1;
fig. 7 is a flowchart of a method for disassembling a pin according to an embodiment of the present invention.
Wherein:
01-pin shaft, 02-center hole, 03-support, 1-jack, 2-door-shaped frame, 3-supporting stool, 4-first elbow and 5-second elbow.
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.
The core of the invention is to provide a pin shaft dismounting tool, which can shorten the maintenance time, and can protectively dismount the pin shaft, thereby prolonging the service life of the support and the pin shaft. The other core of the invention is to provide a method applied to the pin shaft disassembling tool.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
It should be noted that the following directional terms such as "upper end, lower end, left side, right side" and the like are defined based on the drawings of the specification.
Referring to fig. 1 to 7, fig. 1 is a schematic view illustrating a pin dismounting tool according to an embodiment of the present invention; FIG. 2 is a schematic structural view of the first elbow of FIG. 1; FIG. 3 is a top view of FIG. 2; FIG. 4 is a schematic structural view of the second elbow of FIG. 1; FIG. 5 is a top view of FIG. 4; FIG. 6 is a schematic structural view of the pin shaft of FIG. 1; fig. 7 is a flowchart of a method for disassembling a pin according to an embodiment of the present invention.
The pin shaft dismounting tool provided by the embodiment of the invention comprises a liquid nitrogen tank, a liquid nitrogen pump and a jack 1, wherein the liquid nitrogen tank is used for storing liquid nitrogen; the liquid nitrogen pump is connected with the liquid nitrogen tank and used for pumping out liquid nitrogen in the liquid nitrogen tank and conveying the liquid nitrogen to the central hole 02 in the pin shaft 01; when the pin shaft 01 reaches the preset cold shrinkage amount, the jack 1 is used for ejecting the pin shaft 01.
In addition, in order to facilitate the positioning of the jack 1, the tool is further provided with a portal frame 2, the portal frame 2 is of a portal structure, the end parts of two supporting legs of the portal frame 2 are welded with a support 03 of the mounting pin shaft 01, the jack 1 is arranged inside the portal frame 2, one side of the jack 1 is tightly attached to or connected with the inner wall of the portal frame 2, and the other side of the jack is used for jacking the pin shaft 01.
Therefore, the pin shaft dismounting tool achieves the purpose of protectively dismounting the pin shaft 01 in a liquid nitrogen cooling mode, and can avoid destructively cutting off the pin shaft 01, so that the form and position tolerance of the pin shaft 01 and a support hole is not damaged, the service lives of the support 03 and the pin shaft 01 can be prolonged, and 1-time support 03 replacement or online processing of a support hole shaft sleeve can be avoided within 2-3 years; meanwhile, the tool can shorten the maintenance time and save labor, so that the working efficiency can be improved and the production cost can be reduced. The pin shaft disassembling tool and the pin shaft disassembling method have popularization value and obvious economic benefit and social benefit.
The tool can fully utilize the characteristic that the temperature of liquid nitrogen can reach-196 ℃, so that the metal material of the pin shaft 01 is subjected to residual austenite transformation, carbide precipitation and tissue refinement under the low-temperature treatment of the liquid nitrogen, thus the mechanical property of the pin shaft 01 can be improved, and the cold shrinkage of the pin shaft 01 can meet the requirement of a disassembly gap by cooling the contained part (the pin shaft 01) by using the liquid nitrogen.
Like the flame heating disassembly, in order to prevent the temperature change from being conducted to the containing part (the support 03), the jack 1 is firstly used for applying external force, then cold contraction is carried out, when the fit clearance between the containing part and the contained part reaches the critical value of the pressure force of the jack 1, the containing part and the contained part generate relative motion, and therefore the purpose of disassembling the containing part or the contained part can be achieved.
It should be noted that, in consideration of convenience of actual field operation, under the condition that the strength of the pin shaft 01 is not affected, the center of the pin shaft 01 is provided with a center hole 02, single-channel cooling can be realized through the center hole 02, specifically, a center hole 02 with a diameter of phi 20mm can be machined along the axial direction of the pin shaft 01, one end of the pin shaft 01 is reserved with a first threaded hole with a diameter of M30 × 2mm (the position of an original mounting displacement sensor), and the other end of the pin shaft 01 is added with a second threaded hole with a diameter of M24 × 2 mm.
Correspondingly, above-mentioned frock still includes two elbows of being connected with the both ends of round pin axle 01 respectively, and the elbow can be with liquid nitrogen drainage to the inside centre bore 02 of round pin axle 01, and two elbows are first elbow 4 and the second elbow 5 that can be connected with first screw hole and the cooperation of second screw hole respectively, and wherein, the size of first elbow 4 is M30 × 2mm, and the size of second elbow 5 is M24 × 2mm, and two elbows are the buckle elbow to in preserve liquid nitrogen and dismantle round pin axle 01 in the centre bore 02 of round pin axle 01.
Of course, according to the application requirement on the site, the liquid nitrogen in the liquid nitrogen tank can be conveyed to the inside of the pin shaft 01 through one elbow, and can also be conveyed to the inside of the pin shaft 01 through two elbows simultaneously, so that the conveying efficiency of the liquid nitrogen can also be improved.
More specifically, any elbow and the liquid nitrogen tank can be connected through a connecting hose, so that under the driving action of the liquid nitrogen pump, liquid nitrogen in the liquid nitrogen tank can be conveyed into the central hole 02 of the pin shaft 01 through the connecting hose and any elbow so as to be shrunk by the pin shaft 01.
Any elbow can be specifically arranged to comprise a threaded connection section and a hose connection section, wherein the threaded connection section is used for being connected with a threaded hole in the end part of the pin shaft 01; the hose connecting section is vertical to and connected with the thread connecting section, and the hose connecting end is fixedly connected with the connecting hose; meanwhile, through holes used for being communicated with a central hole 02 in the pin shaft 01 are formed in the threaded connection section and the hose connection section.
Of course, according to actual needs, the liquid nitrogen pump can be specifically set to be a ZYB-8 type pedal self-pressurization liquid nitrogen pump, and the volume of the liquid nitrogen tank can be set to be 35L.
In conclusion, liquid nitrogen in the liquid nitrogen tank can be continuously conveyed into the pin shaft 01 through the pedal self-pressurization type liquid nitrogen pump, the connecting hose and the through hole of any elbow, and when the cold shrinkage of the pin shaft 01 meets the disassembly requirement, the pin shaft 01 is extruded out through the jack 1.
In order to optimize the above embodiment, the above tool may further include a supporting stool 3, the supporting stool 3 is disposed between the jack 1 and the pin 01, one side of the supporting stool 3 is in contact with and abuts against an end of the pin 01, the other side of the supporting stool is connected with or in contact with the jack 1, and the supporting stool 3 can play a role in protecting an elbow close to one side of the jack 1.
Preferably, the supporting stool 3 may be provided with a rectangular groove for accommodating the elbow, for example, the supporting stool 3 may be specifically configured to have a structure including a supporting plate and two supporting legs, the rectangular groove for accommodating the elbow may be formed between the two supporting legs, the supporting plate is in contact with or connected to the jack 1, and the bottoms of the two supporting legs are in contact with or abutted to the pin 01. Of course, the structure of the supporting stool 3 may have other different arrangements, and the arrangement that can satisfy the protection of the elbow and can transmit the pressure of the jack 1 is within the protection scope of the present application.
The invention also provides a method applied to the pin shaft dismounting tool, which comprises the following steps:
s1: the jack 1 is positioned through the portal frame 2 and the supporting stool 3;
s2: applying preset pressure to the pin shaft 01 through the jack 1;
s3: liquid nitrogen in the liquid nitrogen tank is pumped out through a liquid nitrogen pump and is conveyed into a central hole 02 in the pin shaft 01 through a connecting hose and an elbow;
s4: and ejecting the pin shaft 01 out through the jack 1 when the pin shaft 01 reaches a preset cold shrinkage amount.
The preset pressure of the jack 1 is a critical pressure value when the jack 1 ejects the pin 01.
Specifically, the dismounting process of the pin shaft 01 of the horizontal hydraulic cylinder of the walking beam of the hot rolling heating furnace can be specifically as follows:
replacing the old pin shaft: the old pin shaft (ground by 0.1mm) of the hydraulic cylinder is replaced by a new pin shaft (a central hole 02 with phi of 20mm is processed in the middle) which is modified and processed so as to be convenient to disassemble and store liquid nitrogen in the channel, and the new pin shaft is pressed in through the jack 1 to complete the replacement of the pin shaft 01.
On-site preparation, before replacing a hydraulic cylinder, a 30mm steel plate is adopted to manufacture a hollow 400mm × 270mm door-shaped frame 2, the hollow frame 2 is welded on one side of a support 03, a 100mm × 130mm supporting stool 3 is manufactured, two buckle elbows of M30 × 2mm and M24 × 2mm are manufactured, a 32t jack 1 and a 35L liquid nitrogen tank are prepared and filled with liquid nitrogen, ZYB-8 type pedal self-pressurizing liquid nitrogen pumps, protective articles, measuring tools and the like.
1 axial flow fan is prepared on site, the site ventilation condition is kept good, and after the operation condition is met, the pin shaft part is disassembled through the 3t chain block fixed hydraulic cylinder, and the pin shaft fixing clamp plate is disassembled.
A first elbow 4 and a second elbow 5 are respectively arranged on two sides of a pin shaft 01, one side of a portal frame 2 props the pin shaft 01 by using a 32t jack 1, a supporting stool 3 is arranged between the jack 1 and the pin shaft 01, then the jack 1 is pressurized, force is continuously exerted on the pin shaft 01, liquid nitrogen is pumped out of a 35L liquid nitrogen tank through a pedal self-pressurization type liquid nitrogen pump, the liquid nitrogen enters a central hole 02 through a connecting hose and any elbow, the pedal type liquid nitrogen pump is stepped 1 time in 1 minute on average to supplement volatilization of the liquid nitrogen until the pin shaft 01 moves and is ejected, the other pin shaft 01 of the hydraulic cylinder is ejected out according to the method, and the hydraulic cylinder is replaced.
It should be noted that, because the temperature of liquid nitrogen can reach-196 ℃, and liquid nitrogen is volatile and has asphyxiability, which is easy to cause severe frostbite to human body, liquid nitrogen operators should wear protective masks to protect face and eyes, wear cold-proof and anti-seepage gloves to protect hands, and labor protection articles should be worn completely without exposed parts to prevent liquid nitrogen from contacting any parts of human body. The use of the liquid nitrogen must be monitored and used by a specially-assigned person, and before the use, constructors are organized to learn the liquid nitrogen use operation rules and handle security mark cards.
Through preliminary estimation, taking the example that 4 heating furnaces are arranged on a hot rolling line and are replaced 2 times every year, the maintenance time can be reduced by 4 hours after the replacement of 1 time is implemented in the disassembly mode, the shutdown time is 1 hour each time the pin shaft 01 is withdrawn from emergency repair, the average time is 6 hours every year, the hot rolling output is calculated according to 12000 tons every day, and the marginal profit of hot rolling is about 400 yuan per ton.
Artificial 8 × 4 × 2 × 59.88.88 +4 × 1 × 10 × 59.88.88 is 0.6 ten thousand yuan.
Yield (4 × 2+6) × 0.04 × 12000/24 ═ 280 ten thousand yuan.
Totaling: 0.6+280 is 280.6 ten thousand yuan.
That is to say, the disassembly mode can increase the production efficiency of 280.6 ten thousand yuan after being implemented.
In addition, the method for disassembling the pin shaft 01 by using the liquid nitrogen is simple, convenient to operate, safe and applicable, unique, capable of greatly shortening the overhaul time, increasing the production time and achieving the aim of protective disassembly so as to ensure that the form and position tolerances of the pin shaft 01 and the support hole are not damaged. According to the difference of the size matching of the hydraulic cylinder pin shaft 01, the method for disassembling the pin shaft 01 by using the liquid nitrogen can be popularized, and the social benefit is remarkable.
It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.
The pin shaft disassembling tool and the pin shaft disassembling method provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (8)
1. The utility model provides a frock is dismantled to round pin axle which characterized in that includes:
a liquid nitrogen tank for storing liquid nitrogen;
the liquid nitrogen pump is connected with the liquid nitrogen tank and used for pumping out liquid nitrogen in the liquid nitrogen tank and conveying the liquid nitrogen to the central hole (02) in the pin shaft (01);
the jack (1) is used for ejecting the pin shaft (01) when the pin shaft (01) reaches a preset cold shrinkage amount.
2. The tooling for disassembling the pin shaft according to claim 1, further comprising two elbows respectively connected to both ends of the pin shaft (01) and capable of guiding liquid nitrogen to the central hole (02) inside the pin shaft (01).
3. The pin shaft dismounting tool according to claim 2, wherein any one of the elbows is connected with the liquid nitrogen tank through a connecting hose.
4. The frock of claim 3, wherein any elbow includes:
the threaded connection section is used for being connected with a threaded hole in the end part of the pin shaft (01);
a hose connecting section perpendicular to and connected to the threaded connecting section;
the through hole is formed in the threaded connection section and the hose connection section and is communicated with a central hole (02) in the pin shaft (01).
5. The pin shaft dismounting tool according to claim 4, wherein the liquid nitrogen pump is a pedal self-pressurization type liquid nitrogen pump.
6. The tooling for disassembling the pin shaft according to any one of claims 2 to 5, further comprising a supporting stool (3) for abutting against the end of the pin shaft (01) and protecting the elbow.
7. The tooling for disassembling the pin shaft according to claim 6, characterized in that the supporting stool (3) is provided with a rectangular groove for accommodating the elbow.
8. A method for disassembling a pin shaft is characterized by comprising the following steps:
the jack (1) is positioned through the portal frame (2) and the supporting stool (3);
applying preset pressure to the pin shaft (01) through the jack (1);
liquid nitrogen in the liquid nitrogen tank is pumped out through a liquid nitrogen pump and is conveyed into a central hole (02) in the pin shaft (01) through a connecting hose and an elbow;
and ejecting the pin shaft (01) through the jack (1) when the pin shaft (01) reaches a preset cold shrinkage amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010305725.7A CN111451715A (en) | 2020-04-17 | 2020-04-17 | Pin shaft dismounting tool and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010305725.7A CN111451715A (en) | 2020-04-17 | 2020-04-17 | Pin shaft dismounting tool and method |
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| CN111451715A true CN111451715A (en) | 2020-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010305725.7A Pending CN111451715A (en) | 2020-04-17 | 2020-04-17 | Pin shaft dismounting tool and method |
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| CN (1) | CN111451715A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113977253A (en) * | 2021-11-29 | 2022-01-28 | 广东华电韶关热电有限公司 | Rapid turbine coupling bolt disassembling tool and using method |
| CN115139081A (en) * | 2022-07-15 | 2022-10-04 | 郑州航空港区速达工业机械服务有限公司 | Mining machinery axis body is dismantled and is used vibration mechanism |
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| CN203817721U (en) * | 2013-12-11 | 2014-09-10 | 马钢(集团)控股有限公司 | Disassembling device for heavy-load hinge pins |
| CN109732272A (en) * | 2019-03-15 | 2019-05-10 | 沈阳建筑大学 | A kind of full-ceramic bearing electric mainshaft bearing and shaft provision for disengagement |
| CN209483738U (en) * | 2019-01-14 | 2019-10-11 | 新疆八一钢铁股份有限公司 | Improved large_sized hydraulic cylinder pin shaft structure |
| CN210099393U (en) * | 2019-05-10 | 2020-02-21 | 南京旭上数控技术有限公司 | Heavy-load main shaft bearing dismounting device |
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2020
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| CN209483738U (en) * | 2019-01-14 | 2019-10-11 | 新疆八一钢铁股份有限公司 | Improved large_sized hydraulic cylinder pin shaft structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113977253A (en) * | 2021-11-29 | 2022-01-28 | 广东华电韶关热电有限公司 | Rapid turbine coupling bolt disassembling tool and using method |
| CN115139081A (en) * | 2022-07-15 | 2022-10-04 | 郑州航空港区速达工业机械服务有限公司 | Mining machinery axis body is dismantled and is used vibration mechanism |
| CN115139081B (en) * | 2022-07-15 | 2024-01-09 | 郑州航空港区速达工业机械服务有限公司 | Vibrating mechanism for disassembling shaft body of mining machinery |
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Application publication date: 20200728 |