CN112372236A - Method for processing lubricating oil scale inclined hole of diesel engine frame - Google Patents
Method for processing lubricating oil scale inclined hole of diesel engine frame Download PDFInfo
- Publication number
- CN112372236A CN112372236A CN202011298750.3A CN202011298750A CN112372236A CN 112372236 A CN112372236 A CN 112372236A CN 202011298750 A CN202011298750 A CN 202011298750A CN 112372236 A CN112372236 A CN 112372236A
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- inclined hole
- lubricating oil
- milling cutter
- oil scale
- wall
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- 239000010687 lubricating oil Substances 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000003801 milling Methods 0.000 claims abstract description 38
- 238000005553 drilling Methods 0.000 claims abstract description 15
- 238000003754 machining Methods 0.000 claims abstract description 14
- 238000007790 scraping Methods 0.000 claims abstract description 10
- 238000005520 cutting process Methods 0.000 claims abstract description 8
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000007306 turnover Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- 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
- B23P13/00—Making metal objects by operations essentially involving machining but not covered by a single other subclass
- B23P13/02—Making metal objects by operations essentially involving machining but not covered by a single other subclass in which only the machining operations are important
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling And Boring (AREA)
Abstract
The invention discloses a method for processing a lubricating oil scale inclined hole of a diesel engine frame, which comprises the following steps: 1) the clamping of completion frame, 2) trilateral sword milling cutter accomplishes the planar processing of strickleing off of drilling in the lubricating oil scale inclined hole, 3) the diapire inclined hole that the lubricating oil scale inclined hole was milled out to end milling cutter head cutting edge, 4) twist drill drills out the inner wall inclined hole, accomplishes the processing of lubricating oil scale inclined hole. The invention completes the processing of the inner wall inclined hole and the bottom wall inclined hole by one-time clamping processing, does not need to turn over, align and reconstruct a coordinate system in the middle, and effectively saves the processing time. Only the twist drill bit needs to be replaced once, so that the tool changing time is reduced, and the machining efficiency is greatly improved. The cutters adopted by the invention are short in length and good in rigidity, and the phenomenon that the cutters are moved up and down during scraping can be avoided. The coaxiality deviation of the inner wall inclined hole and the bottom wall inclined hole is small, and the cutting machining quality of the lubricating oil scale inclined hole is obviously improved.
Description
Technical Field
The invention relates to a method for processing an inclined hole of a box body part, in particular to a method for processing an inclined hole at the lower part of a diesel engine rack, and belongs to the technical field of metal cutting processing.
Background
The diesel engine frame (hereinafter referred to as frame) is a key part of the diesel engine, the upper part of the diesel engine frame is fixedly connected with the cylinder body, the lower part of the diesel engine frame is fixedly connected with the engine base, lubricating oil in a crankcase at the lower part of the engine base is injected into the friction surface of each moving part of the diesel engine through a lubricating oil pump, so that the lubricating oil plays roles of friction reduction, cooling, cleaning, sealing and rust prevention on the moving parts such as a bearing bush, a cylinder sleeve, a gap bridge gear and the like, and plays roles of lubricating and cooling on. Therefore, the lubrication system of the diesel engine is an important system that is related to whether the diesel engine can normally operate and that can extend the service life of the diesel engine. When the diesel engine runs, the liquid level position of lubricating oil in a crankcase needs to be checked frequently, and the liquid level position of the lubricating oil is checked by pulling out an oil dipstick arranged in an oil dipstick inclined hole at the lower part of a rack, so that sufficient lubricating oil is ensured to lubricate each moving part and a crankshaft of the diesel engine. The oil scale inclined hole 10 is shown in fig. 1, and comprises an inner wall inclined hole 102 which penetrates through an inner wall 101 of the rack in an inclined manner and a bottom wall inclined hole 104 of a bottom wall 103 of the rack, and is of a two-section inclined hole structure.
The existing method for processing the lubricating oil dipstick inclined hole of the diesel engine frame comprises the following steps: the method of separately processing the inner wall inclined hole 102 and the bottom wall inclined hole 104 requires four steps as shown in steps a to d of fig. 1. As shown in step a of fig. 1, the frame 100 is first aligned on the machine tool table, and then clamped and compressed to establish a workpiece coordinate system. The gimbaled angle attachment head 200 is replaced. In order to prevent interference, the upper end of the lengthened cutter handle 20 with the length of 700mm is fixedly connected with the universal angle attachment head 200, the lower end of the lengthened cutter handle 20 is connected with the shank of the end mill 30, and then the cutting edge part of the end mill 30 is used for scraping the hole blank. After the center hole is drilled, a twist drill 40 attached by an elongated shank 20 is used to drill an angled inner wall hole 102, as shown in step b of fig. 1. Then, as shown in a step c of fig. 1, the clamped diesel engine frame 100 is loosened, the crane lifts the crane frame 100 and turns over 180 degrees, the bottom of the frame 100 is placed upside down on a workbench of the machine tool, the frame is clamped and compressed after being aligned, a workpiece coordinate system is reconstructed, and an opening is milled by an end mill 30. Finally, as shown in a step d of fig. 1, the twist drill 40 is used for drilling the inclined hole 104 on the bottom wall, so as to finish the machining of the inclined hole of the lubricating oil scale of the diesel engine frame.
The existing method for processing the lubricating oil dipstick inclined hole of the diesel engine frame has the following defects: because the blank surface of the frame is uneven, the end mill 30 and the twist drill 40 are fixedly connected with the universal angle attachment head 200 through the lengthened cutter handle 20 with the length of 700mm, so that the end mill 30 and the twist drill 40 have overlarge winding degree during cutting. In the process of scraping the hole, the cutter is moved up and down, and the scraping can be controlled only by hand, so that the efficiency is low. In addition, the processing method needs secondary clamping, the machine frame 100 needs to be lifted by a crane and turned over for 180 degrees and then is arranged on the worktable of the machine tool for alignment and clamping again, a coordinate system needs to be reconstructed, and the whole process needs at least 4 hours. The lubricating oil scale inclined hole of the diesel engine frame adopts a mode that two sections of the inner wall inclined hole 102 and the bottom wall inclined hole 104 are respectively processed and butted, so that the axial coaxiality error of the inner wall inclined hole 102 and the bottom wall inclined hole 104 is large, the actually measured coaxiality error reaches 0.5mm, and the processing quality of the lubricating oil scale inclined hole of the diesel engine frame is seriously influenced.
Disclosure of Invention
The invention aims to provide a method for machining an inclined hole of a lubricating oil scale of a diesel engine frame, which can improve the machining quality of the frame and improve the machining efficiency.
The invention is realized by the following technical scheme:
a method for processing a lubricating oil dipstick inclined hole of a diesel engine frame comprises the following steps:
1) the bottom of the frame is placed on a machine tool workbench in an upward mode, after alignment, the diesel engine frame is clamped and pressed on the machine tool workbench, a workpiece coordinate system is established, and clamping of the diesel engine frame is completed;
2) replacing the universal angle accessory head, fixing the three-edge milling cutter on the lower end head of the three-edge milling cutter handle, and obliquely installing the upper end of the three-edge milling cutter handle into the universal angle accessory head; starting the machine tool, and moving the universal angle accessory head with the three-edge milling cutter into the machine frame from the open side of the machine frame; starting the three-edge milling cutter, milling while feeding according to a set program, scraping a drilling plane in the inclined hole of the lubricating oil scale on the inner wall of the frame, and finishing the scraping processing of the drilling plane in the inclined hole of the lubricating oil scale;
3) after the end milling cutter is replaced, starting the end milling cutter at a position corresponding to a drilling plane in the inclined hole of the lubricating oil scale on the outer wall of the frame according to a set coordinate, milling while feeding by the end milling cutter, and milling an inclined hole in the bottom wall by a cutting edge at the head of the end milling cutter;
4) after the lengthened twist drill bit is replaced, the lengthened twist drill bit is started according to set coordinates, the lengthened twist drill bit obliquely moves downwards to penetrate through the bottom wall inclined hole, under the guiding of the bottom wall inclined hole, the lengthened twist drill bit penetrates through the inner wall of the rack from the drilling plane in the lubricating oil scale inclined hole milled in the step 2) after penetrating through the cavity in the lower portion of the rack, and therefore the inner wall inclined hole is drilled, and the machining of the lubricating oil scale inclined hole formed by the inner wall inclined hole and the bottom wall inclined hole is completed.
The object of the invention is further achieved by the following technical measures.
Further, in the step 2), the ratio of the width A of the drilling plane in the inclined hole of the lubricating oil scale to the aperture B of the inclined hole on the inner wall of the hole is A/B = 1.44-1.46.
Further, the diameter of the face milling cutter in the step 2) is 250mm, and the thickness of the face milling cutter is 10 mm.
The invention has the following beneficial effects:
1. the bottom of the diesel engine frame is placed on the machine tool workbench in an upward mode, four steps in the prior art are changed into three steps, the inner wall inclined hole and the bottom wall inclined hole can be machined through one-time clamping machining, turning, alignment and coordinate system reconstruction are not needed in the middle, and machining time is effectively saved. Only the twist drill bit needs to be replaced once, so that the tool changing time is reduced, and the machining efficiency is greatly improved.
2. The end mill, the three-edge milling cutter handle and the twist drill bit adopted by the invention have shorter lengths and good rigidity, the phenomenon that the cutter moves up and down when in scraping can not occur, the coaxiality deviation of the inclined hole of the inner wall and the inclined hole of the bottom wall is smaller, and the processing quality of the inclined hole of the lubricating oil scale is obviously improved.
Advantages and features of the present invention will be illustrated and explained by the following non-restrictive description of preferred embodiments thereof, given by way of example only with reference to the accompanying drawings.
Drawings
FIG. 1 is a process step diagram of a prior method for processing an inclined hole of a lubricating oil scale of a diesel engine frame;
fig. 2 is a process step diagram of the present invention.
Detailed Description
The invention is further explained by combining the drawing and a processing embodiment of the L32/40 marine diesel engine frame lubricating oil ruler inclined hole.
The embodiment comprises the following steps:
1) as shown in step a of fig. 2, the bottom of the frame 100 is turned upside down on the machine tool table, and after alignment, the frame 100 is clamped and pressed on the machine tool table, a workpiece coordinate system is established, and clamping of the frame 100 is completed.
2) The universal angle attachment head 200 is replaced, then the three-edge milling cutter 10 with the diameter of 250mm and the thickness of 10mm is fixed on the lower end head of the three-edge milling cutter handle 11, and the upper end of the three-edge milling cutter handle 11 is obliquely arranged in the universal angle attachment head 200. The machine tool is started and the universal angle attachment head 200 carries the three-sided blade milling cutter 10 out of the open left side of the housing 100 and into the housing 100. Starting the three-edge milling cutter 10, milling while feeding the three-edge milling cutter 10 to the right according to a set program, scraping out a lubricating oil dipstick inclined hole inner drilling plane 105 on the inner wall 101 of the frame, wherein A/B =1.45 of the ratio of the width A of the lubricating oil dipstick inclined hole inner drilling plane 105 to the hole inner wall inclined hole aperture B ensures that the twist drill 20 can drill the inner wall inclined hole 102 on the inner wall 101 of the frame.
3) As shown in step b of fig. 2, after the end mill 30 is replaced, the end mill 30 is started at the position corresponding to the drilling plane 105 in the inclined hole of the lubricating oil scale on the outer wall 103 of the housing according to the set coordinates, the end mill 30 mills while feeding, and the cutting edge of the head of the end mill 30 mills the inclined hole 104 of the bottom wall.
4) As shown in the process step c of fig. 2, after the extended twist drill 50 is replaced, the extended twist drill 50 is started according to the set coordinates, the extended twist drill 50 is obliquely moved downwards to penetrate through the bottom wall inclined hole 104, and after the extended twist drill passes through the cavity in the lower portion of the rack under the guidance of the bottom wall inclined hole 104, the inner wall 101 of the rack is drilled through from the drilling plane 105 in the lubricating oil scale inclined hole milled in the step 2), so that the inner wall inclined hole 102 is drilled, and the machining of the lubricating oil scale inclined hole formed by the inner wall inclined hole 102 and the bottom wall inclined hole 104 is completed.
In addition to the above embodiments, the present invention may have other embodiments, and any technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of the claims of the present invention.
Claims (3)
1. A method for processing an inclined hole of a lubricating oil scale of a diesel engine frame is characterized by comprising the following steps:
1) the bottom of the rack is placed on a machine tool workbench upwards, the rack is clamped and pressed on the machine tool workbench after alignment, a workpiece coordinate system is established, and clamping of the rack is completed;
2) replacing the universal angle accessory head, fixing the three-edge milling cutter on the lower end head of the three-edge milling cutter handle, and obliquely installing the upper end of the three-edge milling cutter handle into the universal angle accessory head; starting the machine tool, and moving the universal angle accessory head with the three-edge milling cutter into the machine frame from the open side of the machine frame; starting the three-edge milling cutter, milling while feeding according to a set program, scraping a drilling plane in the inclined hole of the lubricating oil scale on the inner wall of the frame, and finishing the scraping processing of the drilling plane in the inclined hole of the lubricating oil scale;
3) after the end milling cutter is replaced, starting the end milling cutter at a position corresponding to a drilling plane in the inclined hole of the lubricating oil scale on the outer wall of the frame according to a set coordinate, milling while feeding by the end milling cutter, and milling an inclined hole in the bottom wall by a cutting edge at the head of the end milling cutter;
4) after the lengthened twist drill bit is replaced, the lengthened twist drill bit is started according to set coordinates, the lengthened twist drill bit obliquely moves downwards to penetrate through the bottom wall inclined hole, under the guiding of the bottom wall inclined hole, the lengthened twist drill bit penetrates through the inner wall of the rack from the drilling plane in the lubricating oil scale inclined hole milled in the step 2) after penetrating through the cavity in the lower portion of the rack, and therefore the inner wall inclined hole is drilled, and the machining of the lubricating oil scale inclined hole formed by the inner wall inclined hole and the bottom wall inclined hole is completed.
2. The method for machining the lubricating oil dipstick inclined hole of the diesel engine frame as claimed in claim 1, wherein the ratio of the width a of the plane of the hole drilled in the lubricating oil dipstick inclined hole to the diameter B of the inclined hole on the inner wall of the hole in step 2) is a/B = 1.44-1.46.
3. The method for machining the inclined hole of the lubricating oil scale of the diesel engine frame as claimed in claim 1, wherein the diameter of the face milling cutter in the step 2) is 250mm, and the thickness of the face milling cutter is 10 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011298750.3A CN112372236A (en) | 2020-11-19 | 2020-11-19 | Method for processing lubricating oil scale inclined hole of diesel engine frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011298750.3A CN112372236A (en) | 2020-11-19 | 2020-11-19 | Method for processing lubricating oil scale inclined hole of diesel engine frame |
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| Publication Number | Publication Date |
|---|---|
| CN112372236A true CN112372236A (en) | 2021-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011298750.3A Pending CN112372236A (en) | 2020-11-19 | 2020-11-19 | Method for processing lubricating oil scale inclined hole of diesel engine frame |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113878136A (en) * | 2021-09-09 | 2022-01-04 | 中国航发南方工业有限公司 | Method for processing deep inclined two-section hole on engine case |
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|---|---|---|---|---|
| US20080199266A1 (en) * | 2007-02-06 | 2008-08-21 | Kouichi Katoh | Method for machining slide core hole and measurement/correction system for use in machining of slide core hole |
| CN105689751A (en) * | 2016-04-13 | 2016-06-22 | 重庆江增船舶重工有限公司 | Machining method for hollow discontinuous deep hole with inclined workblank face |
| CN107790958A (en) * | 2016-08-30 | 2018-03-13 | 李楠 | A kind of inclined hole processing method |
| CN109014268A (en) * | 2018-08-30 | 2018-12-18 | 中车株洲电力机车有限公司 | A method of the pin hole of processing framework gear-box mounting base |
| CN110524188A (en) * | 2019-08-30 | 2019-12-03 | 中国航发动力股份有限公司 | A kind of processing method in special-shaped part hole |
-
2020
- 2020-11-19 CN CN202011298750.3A patent/CN112372236A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080199266A1 (en) * | 2007-02-06 | 2008-08-21 | Kouichi Katoh | Method for machining slide core hole and measurement/correction system for use in machining of slide core hole |
| CN105689751A (en) * | 2016-04-13 | 2016-06-22 | 重庆江增船舶重工有限公司 | Machining method for hollow discontinuous deep hole with inclined workblank face |
| CN107790958A (en) * | 2016-08-30 | 2018-03-13 | 李楠 | A kind of inclined hole processing method |
| CN109014268A (en) * | 2018-08-30 | 2018-12-18 | 中车株洲电力机车有限公司 | A method of the pin hole of processing framework gear-box mounting base |
| CN110524188A (en) * | 2019-08-30 | 2019-12-03 | 中国航发动力股份有限公司 | A kind of processing method in special-shaped part hole |
Non-Patent Citations (1)
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| 诸全兴，侯慧人等: "《金属切削手册》", 31 May 2011, 上海科学技术出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113878136A (en) * | 2021-09-09 | 2022-01-04 | 中国航发南方工业有限公司 | Method for processing deep inclined two-section hole on engine case |
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Application publication date: 20210219 |
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