CN111774605A - Deep hole drilling method on diesel engine frame - Google Patents
Deep hole drilling method on diesel engine frame Download PDFInfo
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- CN111774605A CN111774605A CN202010609558.5A CN202010609558A CN111774605A CN 111774605 A CN111774605 A CN 111774605A CN 202010609558 A CN202010609558 A CN 202010609558A CN 111774605 A CN111774605 A CN 111774605A
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- drill bit
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- drill
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- 238000005553 drilling Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000001816 cooling Methods 0.000 claims abstract description 30
- 239000000110 cooling liquid Substances 0.000 claims description 31
- 102100039855 Histone H1.2 Human genes 0.000 claims description 2
- 101001035375 Homo sapiens Histone H1.2 Proteins 0.000 claims description 2
- 238000003801 milling Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
- 230000009191 jumping Effects 0.000 abstract description 4
- 238000012545 processing Methods 0.000 description 4
- 238000003754 machining Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000012958 reprocessing 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
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B41/00—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor
- B23B41/02—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor for boring deep holes; Trepanning, e.g. of gun or rifle barrels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B35/00—Methods for boring or drilling, or for working essentially requiring the use of boring or drilling machines; Use of auxiliary equipment in connection with such methods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/10—Arrangements for cooling or lubricating tools or work
Abstract
The invention discloses a method for drilling a deep hole in a diesel engine frame, which comprises the following steps: 1) drilling the oil hole to a depth H1 with the first drill bit; 2) replacing the second drill bit; 3) feeding a second drill to the hole depth h; 4) fast-feed the second drill to hole depth H2; 5) drilling a second drill bit to a depth H3; 6) retracting the second drill bit to the hole depth h; 7) and so on until drilling through; 8) replacing the third drill bit; 9) feeding a third drill to the hole depth h; 10) feeding the third drill to hole depth L1; 11) drilling a third drill bit to a depth L2; 12) and so on until drilling through; 13) and (6) unloading the third drill bit. The drill bit cooling device has the advantages of simple procedure, convenience in operation, low cost, capability of fully cooling the drill bit, good cooling effect, smoothness in chip removal of the drill bit, capability of effectively positioning the drill bit, eliminating the jumping of the drill bit and avoiding the breakage of the drill bit due to the jumping, thereby avoiding the occurrence of safety accidents.
Description
Technical Field
The invention relates to a deep hole drilling method, in particular to a drilling method for a deep long hole in a diesel engine frame, and belongs to the technical field of machining.
Background
The frame is one of the important parts of the diesel medium-speed engine, is a key part of the diesel engine, and directly influences the overall performance and the service life of the diesel engine according to the quality of the frame. As shown in FIG. 1, a main oil passage hole 10, a camshaft hole 20 and an oil hole 30 for lubricating the camshaft hole 20 are arranged on the frame, the oil hole 30 penetrates through the camshaft hole 20, wherein the diameter d of the oil hole 30 is phi 12mm, the total depth L is 515mm, the depth H0 from the top of the oil hole 30 to the upper cambered surface of the camshaft hole 20 is 200mm, and the depth L0 from the top of the oil hole 30 to the lower cambered surface of the camshaft hole 20 is 391 mm. Because the diameter of the oil hole 30 is small, the depth is deep, the depth L of the oil hole exceeds forty times of the diameter d, the middle of the oil hole is also disconnected by the camshaft hole 20, the situation can not be directly processed by adopting a numerical control drilling circulation program, the common drill bit is easy to cause unsmooth chip removal, cooling liquid can not enter the hole, the cooling effect is poor, the drill bit is easy to jump to cause fracture, and the processing is very difficult. Even if the numerical control machining center adopts the high-efficient internal cooling drill bit to drill, not only the high-efficient internal cooling drill bit is expensive, and is with high costs, moreover because the drill bit overlength diameter is little, and the bore depth is just little, and the internal cooling effect is extremely poor, and the chip removal is not smooth, and the drill bit burns out easily, warp or rupture, causes the incident, and in case the drill bit breaks in the hole, is difficult for following the downthehole taking out, and the difficulty of reprocessing is big.
Disclosure of Invention
The invention aims to provide a diesel engine frame deep hole drilling method which is simple in procedure, convenient to operate, smooth in drill bit chip removal and good in cooling effect.
The invention is realized by the following technical scheme:
a method for drilling a deep hole in a diesel engine frame comprises the following steps:
1) the method comprises the steps of installing a first drill bit on a machine tool main shaft of a vertical boring and milling machining center, enabling the machine tool main shaft to rotate forward, drilling an oil hole by using the first drill bit, enabling the drilling depth to be H1, and adding cooling liquid for cooling, wherein H1 is 0.2-0.3 time of the design depth H0 from the top of the oil hole to the upper cambered surface of a camshaft hole;
2) withdrawing the first drill bit, stopping the rotation of the machine tool spindle, closing the cooling liquid, and replacing the first drill bit with a second drill bit;
3) the main shaft of the machine tool rotates forwards, the second drill bit is fed to the hole depth h at a low speed, and cooling liquid is added for cooling;
4) continuing to fast feed the second drill to hole depth H2, H2= H1-2 mm;
5) drilling with slow feed of the second drill to a depth H3, H3= H2+12 mm;
6) rapidly retracting the second drill bit to the hole depth h, and adding cooling liquid for cooling;
7) rapidly feeding the second drill to a hole depth H4, H4= H3-2 mm;
8) drilling with slow feed of the second drill to a depth H5, H5= H4+12 mm;
9) rapidly retracting the second drill bit to the hole depth h, and adding cooling liquid for cooling;
10) by analogy, drilling holes circularly according to the same rule until the holes are drilled to the upper cambered surface of the camshaft hole;
11) withdrawing the second drill bit, stopping the rotation of the machine tool spindle, closing the cooling liquid, and replacing the second drill bit with a third drill bit;
12) the main shaft of the machine tool rotates forwards, the third drill bit is fed to the hole depth h at a low speed, and cooling liquid is added for cooling;
13) continuing to rapidly feed the third drill bit to the hole depth L1, wherein L1= L0-6mm, and L0 is the depth from the top of the oil hole to the lower cambered surface of the camshaft hole;
14) drilling with slow feed of the third drill to a depth of L2, L2= L1+12 mm;
15) quickly returning the third drill bit to the hole depth h, and adding cooling liquid for cooling;
16) rapidly feeding a third drill to a hole depth of L3, L3= L2-2 mm;
17) drilling with slow feed of the third drill to a depth of L4, L4= L3+12 mm;
18) quickly returning the third drill bit to the hole depth h, and adding cooling liquid for cooling;
19) by analogy, drilling holes circularly according to the same rule until the holes reach the upper surface of the main oil passage hole;
20) and withdrawing the third drill bit, stopping the rotation of the machine tool spindle, closing the cooling liquid and dismounting the third drill bit.
The object of the invention is further achieved by the following technical measures.
In the method for drilling the deep hole in the diesel engine frame, the length of the first drill is 60 mm-70 mm.
In the method for drilling the deep hole in the diesel engine frame, the length of the second drill is 200 mm-300 mm.
In the method for drilling the deep hole in the diesel engine frame, the length of the third drill is 500 mm-600 mm.
The method for drilling the deep hole in the diesel engine frame is characterized in that h =4 mm-6 mm.
The invention adopts three sets of drill bits to circularly process the oil hole on the diesel engine frame, has simple procedure, convenient operation and low cost, can fully cool the drill bit once per cycle in the processing process, has good cooling effect, very smooth chip removal of the drill bit, can effectively position the drill bit when the drill bit is fast retreated to the hole depth h, eliminates the jump of the drill bit, and avoids the drill bit from jumping and breaking, thereby avoiding the occurrence of safety accidents. In addition, the first drill is used for drilling to the hole depth H1, and the shallow hole can be used for positioning the second drill and the third drill, so that the machining precision of the oil hole is ensured. The invention has the advantages of low labor intensity, high automation degree, good processing quality, wide application range and good popularization, and can be used for processing other deep and long holes.
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 schematic diagram of the distribution of holes in a diesel engine frame;
FIG. 2 is a schematic view of a first bit of the present invention as it drills to a hole depth H1;
FIG. 3 is a schematic view of the second drill of the present invention fed to a hole depth of 5 mm;
FIG. 4 is a schematic view of the second drill of the present invention as it advances to hole depth H2;
FIG. 5 is a schematic view of a second bit of the present invention as it drills to a hole depth H3;
FIG. 6 is a schematic view of the second drill of the present invention as it advances to hole depth H4;
FIG. 7 is a schematic illustration of a second bit of the present invention as it drills to a hole depth H5;
FIG. 8 is a schematic view of a second bit of the present invention drilling through the uphole face of a camshaft bore;
FIG. 9 is a schematic view of the third drill of the present invention as it advances to a hole depth L1;
FIG. 10 is a schematic view of a third bit of the present invention as it drills to a hole depth L2;
FIG. 11 is a schematic view of the third embodiment of the present invention retracted to a depth of 5 mm;
FIG. 12 is a schematic view of the third drill of the present invention as it advances to a hole depth L3;
FIG. 13 is a schematic view of a third bit of the present invention as it drills to a hole depth L4;
FIG. 14 is a schematic view of a third drill bit of the present invention drilling through the upper surface of the main gallery hole.
Detailed Description
The invention is further illustrated by the following figures and examples.
The machine tool used by the invention is a vertical boring and milling center, and three sets of drill bits are adopted in total, namely a first drill bit 1, a second drill bit 2 and a third drill bit 3, wherein the length of the first drill bit 1 is 60-70 mm, the length of the second drill bit 2 is 200-300 mm, the length of the third drill bit 3 is 500-600 mm, the length of the first drill bit 1 is 65mm, the length of the second drill bit 2 is 250mm, the length of the third drill bit 3 is 566mm, and the drill bit diameters are phi 12 mm.
A method for drilling a deep hole in a diesel engine frame comprises the following steps:
1) as shown in fig. 2, the first drill 1 is mounted on a machine tool main shaft of a vertical boring and milling center, the machine tool main shaft rotates forward, the first drill 1 is used for drilling an oil hole, the drilling depth is H1, and cooling liquid is added for cooling, wherein H1 is 0.2-0.3 times of the design depth H0 from the top of the oil hole 30 to the upper cambered surface of the camshaft hole 20, in the embodiment, H0=200mm, and H1=0.25H0=50 mm;
2) withdrawing the first drill bit 1, stopping the rotation of the machine tool spindle, closing the cooling liquid, and replacing the first drill bit 1 with a second drill bit 2;
3) as shown in fig. 3, the main shaft of the machine tool rotates forwards, the second drill bit 2 is slowly fed to the hole depth h, and cooling liquid is added for cooling;
4) as shown in fig. 4, the second drill 2 is continuously fed to the hole depth H2 quickly, H2= H1-2mm =48mm, ensuring the hole bottom safety distance of 2 mm;
5) as shown in fig. 5, the second drill 2 is slowly fed to drill to a depth H3, H3= H2+12mm =60 mm;
6) the second drill bit 2 is quickly returned to the hole depth h, and cooling liquid is added for cooling, so that the jumping of the drill bit can be eliminated, and the shaking of the drill bit tip part due to centrifugal force after the drill bit is integrally withdrawn is avoided;
7) as shown in fig. 6, the second drill 2 is rapidly fed to the hole depth H4, H4= H3-2mm =58 mm;
8) as shown in fig. 7, the second drill 2 is slowly fed to drill to a depth H5, H5= H4+12mm =70 mm;
9) rapidly returning the second drill bit 2 to the hole depth h, and adding cooling liquid for cooling;
10) by analogy, drilling holes circularly according to the same rule until the holes are drilled to the upper cambered surface of the camshaft hole 20, as shown in fig. 8;
11) withdrawing the second drill bit 2, stopping the rotation of the machine tool spindle, closing the cooling liquid, and replacing the second drill bit 2 with a third drill bit 3;
12) the main shaft of the machine tool rotates forwards, the third drill bit 3 is fed to the hole depth h at a low speed, and cooling liquid is added for cooling;
13) as shown in fig. 9, the third drill 3 is rapidly fed to a hole depth L1, L1= L0-6mm, and L0 is the depth from the top of the oil hole 30 to the lower arc surface of the camshaft hole 20, where L0=391mm, and L1=391-6=385mm in this embodiment;
14) as shown in fig. 10, the third drill 3 is slowly fed to drill to a depth of L2, L2= L1+12mm =397 mm;
15) as shown in fig. 11, rapidly retracting the third drill 3 to the hole depth h, and adding cooling liquid for cooling;
16) as shown in fig. 12, the third drill 3 is rapidly fed to the hole depth L3, L3= L2-2mm =395 mm;
17) as shown in fig. 13, the third drill 3 is slowly fed to drill to a depth of L4, L4= L3+12mm =407 mm;
18) rapidly retracting the third drill bit 3 to the hole depth h, and adding cooling liquid for cooling;
19) by analogy, drilling holes circularly according to the same rule until the holes reach the upper surface of the main oil passage hole 10, as shown in fig. 14;
20) and (4) withdrawing the third drill bit 3, stopping the rotation of the machine tool spindle, closing the cooling liquid and unloading the third drill bit 3.
H =4mm to 6mm in the above step, and h =5mm in the present embodiment.
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 (5)
1. A method for drilling a deep hole in a diesel engine frame is characterized by comprising the following steps:
1) the method comprises the steps of installing a first drill bit on a machine tool main shaft of a vertical boring and milling machining center, enabling the machine tool main shaft to rotate forward, drilling an oil hole by using the first drill bit, enabling the drilling depth to be H1, and adding cooling liquid for cooling, wherein H1 is 0.2-0.3 time of the design depth H0 from the top of the oil hole to the upper cambered surface of a camshaft hole;
2) withdrawing the first drill bit, stopping the rotation of the machine tool spindle, closing the cooling liquid, and replacing the first drill bit with a second drill bit;
3) the main shaft of the machine tool rotates forwards, the second drill bit is fed to the hole depth h at a low speed, and cooling liquid is added for cooling;
4) continuing to fast feed the second drill to hole depth H2, H2= H1-2 mm;
5) drilling with slow feed of the second drill to a depth H3, H3= H2+12 mm;
6) rapidly retracting the second drill bit to the hole depth h, and adding cooling liquid for cooling;
7) rapidly feeding the second drill to a hole depth H4, H4= H3-2 mm;
8) drilling with slow feed of the second drill to a depth H5, H5= H4+12 mm;
9) rapidly retracting the second drill bit to the hole depth h, and adding cooling liquid for cooling;
10) by analogy, drilling holes circularly according to the same rule until the holes are drilled to the upper cambered surface of the camshaft hole;
11) withdrawing the second drill bit, stopping the rotation of the machine tool spindle, closing the cooling liquid, and replacing the second drill bit with a third drill bit;
12) the main shaft of the machine tool rotates forwards, the third drill bit is fed to the hole depth h at a low speed, and cooling liquid is added for cooling;
13) continuing to rapidly feed the third drill bit to the hole depth L1, wherein L1= L0-6mm, and L0 is the depth from the top of the oil hole to the lower cambered surface of the camshaft hole;
14) drilling with slow feed of the third drill to a depth of L2, L2= L1+12 mm;
15) quickly returning the third drill bit to the hole depth h, and adding cooling liquid for cooling;
16) rapidly feeding a third drill to a hole depth of L3, L3= L2-2 mm;
17) drilling with slow feed of the third drill to a depth of L4, L4= L3+12 mm;
18) quickly returning the third drill bit to the hole depth h, and adding cooling liquid for cooling;
19) by analogy, drilling holes circularly according to the same rule until the holes reach the upper surface of the main oil passage hole;
20) and withdrawing the third drill bit, stopping the rotation of the machine tool spindle, closing the cooling liquid and dismounting the third drill bit.
2. The method for drilling the deep hole in the diesel engine frame according to claim 1, wherein: the length of the first drill bit is 60 mm-70 mm.
3. The method for drilling the deep hole in the diesel engine frame according to claim 1, wherein: the length of the second drill bit is 200 mm-300 mm.
4. The method for drilling the deep hole in the diesel engine frame according to claim 1, wherein: the length of the third drill bit is 500 mm-600 mm.
5. The method for drilling the deep hole in the diesel engine frame according to claim 1, wherein: h =4mm to 6 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010609558.5A CN111774605A (en) | 2020-06-30 | 2020-06-30 | Deep hole drilling method on diesel engine frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010609558.5A CN111774605A (en) | 2020-06-30 | 2020-06-30 | Deep hole drilling method on diesel engine frame |
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| Publication Number | Publication Date |
|---|---|
| CN111774605A true CN111774605A (en) | 2020-10-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010609558.5A Pending CN111774605A (en) | 2020-06-30 | 2020-06-30 | Deep hole drilling method on diesel engine frame |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201644874U (en) * | 2010-04-27 | 2010-11-24 | 绵阳华晨瑞安汽车零部件有限公司 | Feed system for deep hole processing |
| CN204101952U (en) * | 2014-06-30 | 2015-01-14 | 徐州中安科技股份有限公司 | Based on the T2225 moldeed depth hole Electrical Control System for Boring Machine of PLC design |
| CN205764023U (en) * | 2016-05-24 | 2016-12-07 | 江苏师范大学 | A kind of deep hole drilling machine |
| CN106825655A (en) * | 2017-01-13 | 2017-06-13 | 航天材料及工艺研究所 | A kind of multiple material aluminium alloy laminated material small hole forming method of big aspect ratio of glass fibre |
| CN110293244A (en) * | 2019-06-20 | 2019-10-01 | 苏州真懿精密器械有限公司 | The deep hole drill method of tiny thin-wall part |
| CN110303181A (en) * | 2019-06-24 | 2019-10-08 | 河南科技学院 | The compound drilling process of difficult-to-machine material |
| CN110497152A (en) * | 2019-08-29 | 2019-11-26 | 中国航发南方工业有限公司 | Casing deep hole processing method and its application |
-
2020
- 2020-06-30 CN CN202010609558.5A patent/CN111774605A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201644874U (en) * | 2010-04-27 | 2010-11-24 | 绵阳华晨瑞安汽车零部件有限公司 | Feed system for deep hole processing |
| CN204101952U (en) * | 2014-06-30 | 2015-01-14 | 徐州中安科技股份有限公司 | Based on the T2225 moldeed depth hole Electrical Control System for Boring Machine of PLC design |
| CN205764023U (en) * | 2016-05-24 | 2016-12-07 | 江苏师范大学 | A kind of deep hole drilling machine |
| CN106825655A (en) * | 2017-01-13 | 2017-06-13 | 航天材料及工艺研究所 | A kind of multiple material aluminium alloy laminated material small hole forming method of big aspect ratio of glass fibre |
| CN110293244A (en) * | 2019-06-20 | 2019-10-01 | 苏州真懿精密器械有限公司 | The deep hole drill method of tiny thin-wall part |
| CN110303181A (en) * | 2019-06-24 | 2019-10-08 | 河南科技学院 | The compound drilling process of difficult-to-machine material |
| CN110497152A (en) * | 2019-08-29 | 2019-11-26 | 中国航发南方工业有限公司 | Casing deep hole processing method and its application |
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Application publication date: 20201016 |