CN112025204A - Method for repairing embedded back hinge of ejector rod hole of machine body - Google Patents
Method for repairing embedded back hinge of ejector rod hole of machine body Download PDFInfo
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- CN112025204A CN112025204A CN202010900744.4A CN202010900744A CN112025204A CN 112025204 A CN112025204 A CN 112025204A CN 202010900744 A CN202010900744 A CN 202010900744A CN 112025204 A CN112025204 A CN 112025204A
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- rod hole
- ejector rod
- bushing
- machine body
- hole
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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
- B23P6/00—Restoring or reconditioning objects
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling, Broaching, Filing, Reaming, And Others (AREA)
Abstract
In order to solve the problem that the existing ejector rod hole repairing difficulty is large and the machining precision of the ejector rod hole is difficult to guarantee, the invention provides a method for repairing an inserted sleeve back hinge of a machine body ejector rod hole, which comprises the following steps: arranging a bushing in the counterbored ejector rod hole to obtain an ejector rod hole with the bushing; adjusting a spindle of a rocker drill above the jack rod hole with the bushing; the reamer handle is upwards penetrated through the bottom of the ejector rod hole with the bushing, and the cutter handle is connected with a main shaft of the rocker drill; the reamer is driven by the rocker drill to feed upwards along the center of the ejector rod hole with the bushing, and the original machined part of the ejector rod hole is used for guiding until the repair of the ejector rod hole is completed; and (5) additionally processing the radial oil hole and the chamfer, cleaning the flash and the burr, and finishing the repair. The method can ensure the quality of repairing the bushing back hinge of the ejector rod hole of the machine body, is simple to operate and has low requirement on the skill level of workers.
Description
Technical Field
The invention belongs to the technical field of machining, and particularly relates to a method for repairing an embedded sleeve back hinge of a machine body ejector rod hole.
Background
The engine body is an important part of the diesel engine, and the ejector rod hole is one of holes with higher precision requirements on the engine body. The machine body blank is generally formed by casting, and if the model or pouring is improper, the machined ejector rod hole has the defects of air holes, looseness and the like, so that the finished machine body is scrapped.
In order to avoid economic loss, casting defects of the ejector rod hole are usually generated, firstly, the ejector rod hole is reamed, then, a lining sleeve is embedded, and then, the lining sleeve is machined by using a reamer so as to recover the accuracy of the ejector rod hole.
If the casting defect is located at the lower section of the ejector rod hole, after reaming and bushing are carried out on the lower section of the ejector rod hole, the ejector rod hole can be repaired by directly using a reamer to guide the upper section of the ejector rod hole. If the casting defect is located at the upper section of the ejector rod hole, the ejector rod hole is repaired by a reamer after the bushing is embedded in the reaming hole, and the center of the reamed hole is easily deviated from the center of the original ejector rod hole due to no guidance, so that the position degree and the cylindricity of the ejector rod hole are out of tolerance. If the whole ejector rod hole is subjected to reaming and bushing treatment and then the ejector rod hole is processed, the repairing difficulty is increased, the bushing is easy to loosen, and the machining precision of the ejector rod hole is difficult to ensure.
In a word, the existing ejector rod hole is difficult to repair, and the machining precision of the ejector rod hole is difficult to ensure.
Disclosure of Invention
In order to solve the problems that the existing ejector rod hole is difficult to repair and the machining precision of the ejector rod hole is difficult to guarantee, the invention provides a method for repairing an embedded sleeve back hinge of a machine body ejector rod hole, which can effectively solve the technical problems.
In order to achieve the purpose, the invention adopts the specific scheme that:
a method for repairing a back hinge of a bushing of a top rod hole of a machine body comprises the following steps:
arranging a bushing in the counterbored ejector rod hole to obtain an ejector rod hole with the bushing;
adjusting a spindle of a rocker drill above the jack rod hole with the bushing;
the reamer handle is upwards penetrated through the bottom of the ejector rod hole with the bushing, and the cutter handle is connected with a main shaft of the rocker drill;
the reamer is driven by the rocker drill to feed upwards along the center of the ejector rod hole with the bushing, and the original machined part of the ejector rod hole is used for guiding until the repair of the ejector rod hole is completed;
and (5) additionally processing the radial oil hole and the chamfer, cleaning the flash and the burr, and finishing the repair.
The step of arranging the bushing in the ejector rod hole to be repaired comprises the following steps:
and (4) arranging the bushing in liquid nitrogen, fully freezing, and then filling the bushing into the counterbored ejector rod hole.
Before the step of arranging the bushing in the mandril hole to be repaired, the method comprises the following steps:
installing a machine body to be repaired on a workbench, compacting the machine body, and marking a mandril hole to be repaired;
aligning the center of a to-be-repaired ejector rod hole, and expanding a section of the repaired ejector rod hole with defects through a boring cutter to obtain the reamed ejector rod hole;
and enabling the outer diameter of the bushing to be in interference fit with the reamed ejector rod hole.
In the step of enabling the outer diameter of the bushing to be in interference fit with the reamed ejector rod hole:
has the advantages that: according to the reamer, the handle part of the reamer penetrates upwards from the bottom of the ejector rod hole with the bushing, the cutter handle is connected with the main shaft of the rocker drill, the rocker drill drives the reamer to feed upwards along the center of the ejector rod hole with the bushing, and the reaming is equivalent to the back-to-back movement from bottom to top until the restoration of the ejector rod hole is completed; the method can ensure the quality of repairing the bushing back hinge of the ejector rod hole of the machine body, is simple to operate and has low requirement on the skill level of workers.
Drawings
Fig. 1 is a schematic view of back hinge processing of a top rod hole of a machine body in an embodiment of the invention.
In the figure: 1. reamer, 2, bush.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
As shown in FIG. 1, the following technical solutions are adopted to achieve the above purpose:
1. and installing the body to be repaired on a numerical control machine tool workbench, pressing the body tightly, and marking the ejector rod hole to be repaired.
2. And installing an indicator on a main shaft of the machine tool, aligning the center of the ejector rod hole to be repaired, then replacing a boring cutter, expanding the section of the ejector rod hole to be repaired with defects, and measuring the diameter of the reamed ejector rod hole to obtain the reamed ejector rod hole.
3. The bush is made of the same material as the engine body, the matching interference between the outer diameter of the bush and the reamed ejector rod hole is ensured to be 0.03 mm-0.05 mm, and a certain reaming allowance is reserved for the inner hole of the bush according to the hole diameter.
4. Fully freezing the bush in liquid nitrogen, and then filling the bush into the expanded ejector rod hole to obtain the ejector rod hole with the bush; the body is then mounted to the rocker drill.
5. After the bushing is tensioned, the main shaft of the rocker drill is adjusted to be above the ejector rod hole with the bushing, and then the reamer handle is upwards penetrated through the bottom of the ejector rod hole with the bushing, so that the reamer handle is connected with the main shaft of the rocker drill.
6. And starting the main shaft of the rocker drill to enable the reamer to feed upwards under the guiding condition of the original processing part of the ejector rod hole until the restoration processing of the ejector rod hole is completed.
7. And (4) additionally processing radial oil holes, chamfers and the like, cleaning burrs and fins, and inspecting.
Specific example I: 2 similar bodies needing to be repaired by the ejector pin hole are found.
Wherein the diameter of the ejector pin hole to be repaired of item 1 in table I is: phi 40.078 to be repaired is set as: the upper end of the hole; .
Wherein the diameter of the ejector pin hole to be repaired of item 2 in table I is: phi 40.081 to be repaired is set as: the upper end of the hole;
wherein, table I: the results of the experiment were compared.
According to the content in table 1, the reamer is different from a common reamer which is inserted into a cutter from the upper end of a top rod hole and is reamed from top to bottom, the reamer is inserted into the cutter from the top end of the top rod hole with a lining, then is reamed by moving back and forth from bottom to top, the top rod hole with the lining is machined by fully utilizing the guide of the original machining part of the top rod hole, the quality of repairing the top rod hole can be improved, the ultra-difference of cylindricity and position degree of the top rod hole caused by a common reaming mode is avoided, the operation is simple, and the operation requirement on workers is low.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily change or replace the present invention within the technical scope of the present invention. Therefore, the protection scope of the present invention is subject to the protection scope of the claims.
Claims (4)
1. The method for repairing the embedded back hinge of the ejector rod hole of the machine body is characterized by comprising the following steps of:
arranging a bushing in the counterbored ejector rod hole to obtain an ejector rod hole with the bushing;
adjusting a spindle of a rocker drill above the jack rod hole with the bushing;
the reamer handle is upwards penetrated through the bottom of the ejector rod hole with the bushing, and the cutter handle is connected with a main shaft of the rocker drill;
the reamer is driven by the rocker drill to feed upwards along the center of the ejector rod hole with the bushing, and the original machined part of the ejector rod hole is used for guiding until the repair of the ejector rod hole is completed;
and (5) additionally processing the radial oil hole and the chamfer, cleaning the flash and the burr, and finishing the repair.
2. The method for repairing the inserted sleeve back hinge of the ejector rod hole of the machine body according to claim 1, wherein the step of arranging the sleeve in the ejector rod hole to be repaired comprises the following steps:
and (4) arranging the bushing in liquid nitrogen, fully freezing, and then filling the bushing into the counterbored ejector rod hole.
3. The method for repairing the inserted sleeve back hinge of the ejector rod hole of the machine body according to claim 2, wherein before the step of arranging the sleeve in the ejector rod hole to be repaired, the method comprises the following steps:
installing a machine body to be repaired on a workbench, compacting the machine body, and marking a mandril hole to be repaired;
the center of the ejector rod hole to be repaired is aligned, a section with defects of the repaired ejector rod hole is expanded through a boring cutter,
obtaining the counterbored ejector rod hole;
and enabling the outer diameter of the bushing to be in interference fit with the reamed ejector rod hole.
4. The method for repairing the bushing back hinge of the ejector rod hole of the machine body according to claim 3, wherein in the step of enabling the outer diameter of the bushing to be in interference fit with the reamed ejector rod hole:
the interference magnitude of the outer diameter of the bushing and the reamed ejector rod hole is 0.03-0.05 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010900744.4A CN112025204A (en) | 2020-08-31 | 2020-08-31 | Method for repairing embedded back hinge of ejector rod hole of machine body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010900744.4A CN112025204A (en) | 2020-08-31 | 2020-08-31 | Method for repairing embedded back hinge of ejector rod hole of machine body |
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| CN112025204A true CN112025204A (en) | 2020-12-04 |
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| CN202010900744.4A Pending CN112025204A (en) | 2020-08-31 | 2020-08-31 | Method for repairing embedded back hinge of ejector rod hole of machine body |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112264763A (en) * | 2020-12-14 | 2021-01-26 | 中车戚墅堰机车有限公司 | Method for repairing bolt hole of diesel engine motor |
| CN112705903A (en) * | 2020-12-18 | 2021-04-27 | 湖南江滨机器（集团）有限责任公司 | Lathe tailstock repairing method |
| CN113399697A (en) * | 2021-07-08 | 2021-09-17 | 中车太原机车车辆有限公司 | Detection and repair method for ejector rod clamping stagnation of railway vehicle relief valve |
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| CN109514172A (en) * | 2018-11-19 | 2019-03-26 | 德阳东汽电站机械制造有限公司 | A kind of method of insetting sleeve repair threaded hole |
| CN111438545A (en) * | 2020-05-15 | 2020-07-24 | 沈阳飞机工业（集团）有限公司 | Machining and repairing tool for eccentric positioning hole of special-shaped inserting part and using method |
| CN111531319A (en) * | 2020-05-08 | 2020-08-14 | 河南柴油机重工有限责任公司 | Method for repairing main shaft hole of internal combustion engine body and application |
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2020
- 2020-08-31 CN CN202010900744.4A patent/CN112025204A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4852236A (en) * | 1988-07-11 | 1989-08-01 | Emery Corporation | Method of repairing a worn wobbler housing for a constant-speed drive |
| CN101941131A (en) * | 2009-07-06 | 2011-01-12 | 哈尔滨汽轮机厂有限责任公司 | Method for repairing cylinder screw holes and special scraper and screw tap for implementing method |
| CN103521844A (en) * | 2012-07-06 | 2014-01-22 | 北汽福田汽车股份有限公司 | Expanding and reaming composite machining tool and method for machining engine cylinder block tappet rod holes |
| CN103433685A (en) * | 2013-09-16 | 2013-12-11 | 南车戚墅堰机车有限公司 | Bushing repairing method of diesel engine body cam hole |
| CN107322233A (en) * | 2017-06-19 | 2017-11-07 | 重庆铁马工业集团有限公司 | Big machinery bench top is portalled method of worn |
| CN109290734A (en) * | 2018-10-25 | 2019-02-01 | 湘电风能有限公司 | A kind of field repair equipment of large apertures |
| CN109514172A (en) * | 2018-11-19 | 2019-03-26 | 德阳东汽电站机械制造有限公司 | A kind of method of insetting sleeve repair threaded hole |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112264763A (en) * | 2020-12-14 | 2021-01-26 | 中车戚墅堰机车有限公司 | Method for repairing bolt hole of diesel engine motor |
| CN112705903A (en) * | 2020-12-18 | 2021-04-27 | 湖南江滨机器（集团）有限责任公司 | Lathe tailstock repairing method |
| CN112705903B (en) * | 2020-12-18 | 2022-03-01 | 湖南江滨机器（集团）有限责任公司 | Lathe tailstock repairing method |
| CN113399697A (en) * | 2021-07-08 | 2021-09-17 | 中车太原机车车辆有限公司 | Detection and repair method for ejector rod clamping stagnation of railway vehicle relief valve |
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Application publication date: 20201204 |
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