CN114871697A - Machining method for deep-cavity special-shaped sensor hole of cast iron cylinder cover - Google Patents
Machining method for deep-cavity special-shaped sensor hole of cast iron cylinder cover Download PDFInfo
- Publication number
- CN114871697A CN114871697A CN202210485955.5A CN202210485955A CN114871697A CN 114871697 A CN114871697 A CN 114871697A CN 202210485955 A CN202210485955 A CN 202210485955A CN 114871697 A CN114871697 A CN 114871697A
- Authority
- CN
- China
- Prior art keywords
- drill
- hole
- special
- processing
- milling cutter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling And Boring (AREA)
Abstract
The invention discloses a method for processing a deep-cavity special-shaped sensor hole of a cast iron cylinder cover, which belongs to the technical field of special-shaped part processing and comprises the steps of clamping a workpiece on a vertical-horizontal conversion processing center; milling the plane of the sensor conduit hole by using an end mill; drilling through a sensor conduit hole using a drill bit; preparing a corresponding milling cutter, a center drill and a drill bit according to the diameter size and the processing depth of the sensor hole to be processed; drilling and milling the wall surface of the special-shaped part and the plane of the sensor hole along the processing axis by using a milling cutter; using a center drill to drill a centering hole on the plane of the sensor hole along the processing axis; further processing the centering hole to a required depth by using a drill bit; the sensor conduit is bored to a depth dimension. The invention can finish the processing with high efficiency and high quality without a special clamp and a special cutter, saves the processing cost and the processing time, has simple operation, does not need a special clamp and a customized cutter, has high processing precision and is not easy to have the phenomenon of sliding and folding.
Description
Technical Field
The invention discloses a method for processing a special-shaped sensor hole of a deep cavity of a cast iron cylinder cover, and belongs to the technical field of special-shaped part processing.
Background
The engine of the automobile is a device for providing power for the automobile, is the heart of the automobile and determines the dynamic property, the economical efficiency, the stability and the environmental protection property of the automobile. The engine cylinder cover is one of the most critical parts in the engine, the precision requirement is high, the processing technology is complex, and the processing quality directly influences the overall performance and quality of the engine, so the processing of the engine cylinder cover is particularly important, especially a sensor hole is processed on a finished cylinder cover, the material of the cast iron cylinder cover is hard, the modeling layout in a cavity is complex and various, the diameter of the sensor hole is small, the processing difficulty is high, and if the processing fails, the cylinder cover is scrapped to directly cause economic loss.
Engineers often need to determine in-cylinder parameters of an engine. In the process of trial production of the engine, a hole is drilled obliquely outside a combustion chamber of the cylinder cover, and a temperature sensor is inserted into the oblique hole so as to detect the temperature of the engine in a working environment. The cylinder cover of the cast iron engine is made of harder material, and the internal modeling layout is complex and various, so that certain difficulty is brought to the processing of the sensor hole.
In the prior art, a method for processing a deep hole generally comprises the steps of processing a plane by using a milling cutter, drilling a central hole by using a central drill, drilling a pre-drilled hole by using a short drill bit, and finally processing a hole by using a long drill bit. This method can only be used for machining parts whose machining area is solid. The conventional method is difficult to process the deep-cavity special-shaped sensor hole of the cast iron cylinder cover. As shown in fig. 1, the processing area is a deep cavity and has the cross section profile interference of the profile part 2. When the conventional drilling method is adopted, when a drill bit is just cut into a machined inclined plane, a cutter can generate a sliding cutter, and the conditions of cutter hitting and hole drilling deviation are easy to occur.
Disclosure of Invention
The invention aims to solve the problems that when a drill bit is just cut into a machined inclined plane in the conventional drilling machining method, a cutter generates a sliding cutter, and the cutter drilling and the hole drilling are prone to deflection, and provides a machining method for a special-shaped sensor hole of a deep cavity of a cast iron cylinder cover.
The invention aims to solve the problems and is realized by the following technical scheme:
a processing method of a deep-cavity special-shaped sensor hole of a cast iron cylinder cover comprises the following steps:
step S10, clamping a workpiece on a vertical-horizontal conversion type machining center;
step S20, milling the plane of the sensor conduit hole by using an end mill;
step S30, drilling through the sensor guide tube hole using the drill bit;
step S40, preparing a corresponding milling cutter, a center drill and a drill bit according to the diameter and the processing depth of the sensor hole to be processed;
step S50, drilling and milling the wall surface of the special-shaped part and the plane of the sensor hole along the processing axis by using a milling cutter;
step S60, using a center drill to drill a centering hole on the plane of the sensor hole along the processing axis;
step S70, further processing the centering hole to the required depth by using a drill bit;
step S80, the sensor conduit is bored to a depth dimension.
Preferably, in step S20: the end mill is a hard alloy double-edge milling cutter, the rotating speed of the end mill is 1500r/min, the feed amount is 120mm/min, and the end mill is cooled by adopting an external cooling mode.
Preferably, in step S30: the drill bit is a hard alloy drill bit with two sharp corners, the rotating speed is 2000r/min, the feed amount is 150mm/min, and the drill bit is cooled internally.
Preferably, in step S30: the depth of the sensor conduit hole 4 drilled through is processed 3mm downwards.
Preferably, in step S50: the milling cutter is a hard alloy four-edge flat-bottom milling cutter, the diameter of the milling cutter is 4mm, the total length of the milling cutter is 125mm, the length of a cutting edge is 40mm, the rotating speed of the milling cutter is 1000r/min, the feed amount of the milling cutter is 50mm/min, and the milling cutter is cooled by adopting an external cooling method.
Preferably, in step S50: and the milling cutter adopts pecking type cutter-withdrawing and cutting-off type drilling and milling processing, the cutting depth of the milling cutter is 0.5mm and the cutter is withdrawn 2mm each time, the milling cutter is processed until the upper surface of the sensor hole stays for 1s, and then the milling cutter is lifted to a safe height.
Preferably, in step S60: the total length of the center drill is 130mm, the diameter of the shank is 4mm, the length is 126mm, the drill tip is 2.2mm, the length is 4mm, the rotating speed is 600r/min, the feed rate is 30mm/min, and the center drill is cooled by adopting an external cooling method.
Preferably, in step S60: and (3) drilling a centering hole on the plane of the sensor hole along the machining axis by using a center drill for machining the depth of 1-2 mm.
Preferably, in step S70: the drill bit is a hard alloy drill bit with two sharp corners and two edges, the total length of the drill bit is 130mm, the handle diameter of the drill bit is 4mm, the length of the drill bit is 90mm, the diameter of the drill bit is 2.2mm, the length of the drill bit is 40mm, the rotating speed of the drill bit is 600r/min, the feed rate of the drill bit is 30mm/min, and external cooling is adopted.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses a method for processing a special-shaped sensor hole of a deep cavity of a cast iron cylinder cover, which can finish processing with high efficiency and high quality without a special clamp and a special cutter, saves processing cost and processing time, is simple to operate, does not need a special clamp and a customized cutter, has high processing precision, and is not easy to generate the phenomenon of sliding and folding a cutter.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
FIG. 1 is a schematic view of a part of the structure and machining part of a cast iron cylinder head according to the present invention;
FIG. 2 is a schematic plan view of a milling cutter according to the present invention for machining a profile surface and a sensor hole;
FIG. 3 is a schematic view of the center drill of the present invention machining a center hole;
FIG. 4 is a schematic view of the depth of cut of the drill bit of the present invention; .
Wherein:
1-cast iron cylinder cover;
2-a profiled part;
3-machining axis;
4-sensor conduit hole;
5-sensor hole;
6-milling cutter;
7-central drilling;
8-bit.
Detailed Description
The invention is further illustrated below with reference to the accompanying figures 1-4:
the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention.
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.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings,
this is done solely for the purpose of facilitating the description of the invention and simplifying the description, and is not intended to indicate or imply that the device or element so referred to must be in a particular orientation, constructed and operated, and therefore should not be taken as limiting the invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected;
they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 2, a first embodiment of the present invention provides a method for machining a deep-cavity irregular sensor hole of a cast-iron cylinder head based on the prior art, which includes:
step S10, clamping the workpiece 1 on a vertical-horizontal conversion type machining center;
and step S20, milling the plane of the sensor guide pipe hole 4 by using an end mill, wherein the end mill with the diameter of 12mm is a hard alloy two-edge mill, the rotating speed is 1500r/min, the feed rate is 120mm/min, and the end mill is cooled by adopting an external cooling mode.
And step S30, drilling through the sensor guide pipe hole 4 by using a drill, wherein the drill with the diameter of 4mm is a hard alloy drill with two sharp corners, the rotating speed is 2000r/min, the feed rate is 150mm/min, and the drill is cooled in an inner cooling mode. The depth of the sensor conduit hole 4 drilled through is processed 3mm downwards. Wherein, the sensor conduit hole is firstly processed into a through hole with the diameter 4, which plays the role of guiding and fixing the position for the milling cutter 6, thereby preventing the sliding cutter phenomenon.
Step S40, preparing a corresponding milling cutter 6, a center drill 7 and a drill bit 8 according to the diameter and the processing depth of the sensor hole to be processed;
and step S50, drilling and milling the wall surface of the special-shaped part 2 and the plane of the sensor hole 5 along the processing axis 3 by using a milling cutter 6, wherein the milling cutter 6 is a hard alloy four-edge flat-bottom milling cutter, the diameter of the milling cutter is 4mm, and the total length of the milling cutter is 125 mm. The cutting edge length is 40mm, the rotating speed is 1000r/min, the feed rate is 50mm/min, and the external cooling type cooling is adopted. The milling cutter 6 is processed by adopting a pecking type cutter-withdrawing and cutting-breaking type drilling and milling mode, the cutting depth of the milling cutter is 0.5mm and the cutter is withdrawn 2mm each time, the milling cutter is processed until the upper surface of the sensor hole 5 stays for 1s, and then the milling cutter is lifted to a safe height. The effect of the 2mm withdrawal of the cutter at each cutting depth of 0.5mm is to prevent the milling cutter 6 from deviating from the machining axis 3, and the effect of the 1s stop of the machining until the upper surface of the sensor hole 5 is corrected for the position of the sensor hole 5.
Step S60, using a center drill 7 to drill a centering hole on the plane of the sensor hole 5 along the processing axis 3, wherein the total length of the center drill 7 is 130mm, the shank diameter is 4mm, the length is 126mm, the drill tip is 2.2mm, the length is 4mm, the rotating speed is 600r/min, the feed amount is 30mm/min, and external cooling type cooling is adopted, and the centering hole is drilled on the plane of the sensor hole 5 along the processing axis 3, and the processing depth is 1-2mm as shown in figure 3.
Step S70, further processing the centering hole to the required depth by using the drill 8, wherein the drill 8 is a hard alloy drill with two edges and sharp corners, the total length of the drill is 130mm, the handle diameter of the drill is 4mm, the length of the drill is 90mm, the diameter of the drill is 2.2mm, the length of the drill is 40mm, the rotating speed of the drill is 600r/min, the feed amount of the drill is 30mm/min, and external cooling is adopted, as shown in figure 4.
Step S80, the sensor conduit is bored to a depth dimension.
The invention firstly processes the sensor conduit hole into the same size with the diameter of the plane of the sensor hole, plays the role of guiding and fixing the position for a milling cutter for processing the plane of the sensor hole and prevents the sliding cutter from hitting the cutter. The processing mode adopts pecking type cutter withdrawal and cutting type drilling and milling processing, the cutter is withdrawn by 2mm when the milling cutter is cut to the depth of 0.5mm each time, the milling cutter is lifted to a safe height after being processed until the upper surface of the sensor hole stays for 1s, the cutter is withdrawn by 2mm when the milling cutter is cut to the depth of 0.5mm each time, the milling cutter is prevented from deviating from a processing axis, and the cutter is processed until the upper surface of the sensor hole stays for 1s and is used for correcting the position degree of the sensor hole; the cutter is effectively protected, and the machining precision is improved;
a central hole is drilled by using a center before drilling, so that a guiding effect is achieved for a drill bit, and the position degree of a sensor hole is ensured; the machining method of the deep cavity sensor hole is simple to operate, does not need a special clamp or a customized cutter, is high in machining precision, is not prone to sliding cutter folding, and improves machining efficiency and product quality.
While embodiments of the invention have been disclosed above, it is not intended to be limited to the uses set forth in the specification and examples. It can be applied to all kinds of fields suitable for the present invention.
Additional modifications will readily occur to those skilled in the art. It is therefore intended that the invention not be limited to the exact details and illustrations described and illustrated herein, but fall within the scope of the appended claims and equivalents thereof.
Claims (9)
1. A processing method of a special-shaped sensor hole of a deep cavity of a cast iron cylinder cover is characterized by comprising the following steps:
step S10, clamping the workpiece (1) on a vertical-horizontal conversion type machining center;
step S20, milling the plane of the sensor guide pipe hole (4) by using an end mill;
step S30, drilling through a sensor conduit hole (4) by using a drill bit;
step S40, preparing a corresponding milling cutter (6), a central drill (7) and a drill (8) according to the diameter and the processing depth of the sensor hole to be processed;
step S50, drilling and milling the wall surface of the special-shaped part (2) and the plane of the sensor hole (5) along the machining axis (3) by using a milling cutter (6);
step S60, using a center drill (7) to drill a centering hole on the plane of the sensor hole (5) along the processing axis (3);
step S70, further processing the centering hole to the required depth by using a drill bit (8);
step S80, the sensor conduit is bored to a depth dimension.
2. The method for machining the special-shaped sensor hole in the deep cavity of the cast iron cylinder head as claimed in claim 1, wherein in the step S20: the end mill is a hard alloy double-edge milling cutter, the rotating speed of the end mill is 1500r/min, the feed amount is 120mm/min, and the end mill is cooled by adopting an external cooling mode.
3. The method for machining the special-shaped sensor hole in the deep cavity of the cast iron cylinder head as claimed in claim 2, wherein in the step S30: the drill bit is a hard alloy drill bit with two sharp corners, the rotating speed is 2000r/min, the feed amount is 150mm/min, and the drill bit is cooled internally.
4. The method for machining the special-shaped sensor hole in the deep cavity of the cast iron cylinder head as claimed in claim 3, wherein in the step S30: the depth of the sensor conduit hole 4 drilled through is processed 3mm downwards.
5. The method for machining the special-shaped sensor hole in the deep cavity of the cast iron cylinder head as claimed in claim 4, wherein in the step S50: the milling cutter (6) is a hard alloy four-edge flat-bottom milling cutter, the diameter of the milling cutter is 4mm, the total length of the milling cutter is 125mm, the length of a cutting edge is 40mm, the rotating speed of the milling cutter is 1000r/min, the feed amount of the milling cutter is 50mm/min, and the milling cutter is cooled by adopting an external cooling mode.
6. The machining method for the special-shaped sensor hole of the deep cavity of the cast iron cylinder cover as claimed in claim 5, wherein in the step S50: the milling cutter (6) adopts pecking type cutter withdrawal cutting type drilling and milling processing, the cutting depth of the milling cutter is 0.5mm and the cutter withdrawal is 2mm each time, the milling cutter is processed until the upper surface of the sensor hole (5) stays for 1s, and then the milling cutter is lifted to a safe height.
7. The method for machining the special-shaped sensor hole in the deep cavity of the cast iron cylinder head as claimed in claim 6, wherein in the step S60: the total length of the central drill (7) is 130mm, the diameter of a handle is 4mm, the length is 126mm, the drill tip is 2.2mm, the length is 4mm, the rotating speed is 600r/min, the feed rate is 30mm/min, and external cooling is adopted for cooling.
8. The method for machining the special-shaped sensor hole in the deep cavity of the cast iron cylinder head as claimed in claim 7, wherein in the step S60: and (3) drilling a centering hole on the plane of the sensor hole (5) along the machining axis (3) by using a center drill (7) to a machining depth of 1-2 mm.
9. The method for machining the special-shaped sensor hole of the deep cavity of the cast iron cylinder head as claimed in claim 8, wherein in the step S70: the drill (8) is a hard alloy drill with two sharp angles and two edges, the total length of the drill is 130mm, the handle diameter of the drill is 4mm, the length of the drill is 90mm, the diameter of the drill is 2.2mm, the length of the drill is 40mm, the rotating speed of the drill is 600r/min, the feed rate of the drill is 30mm/min, and external cooling is adopted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210485955.5A CN114871697A (en) | 2022-05-06 | 2022-05-06 | Machining method for deep-cavity special-shaped sensor hole of cast iron cylinder cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210485955.5A CN114871697A (en) | 2022-05-06 | 2022-05-06 | Machining method for deep-cavity special-shaped sensor hole of cast iron cylinder cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114871697A true CN114871697A (en) | 2022-08-09 |
Family
ID=82674209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210485955.5A Pending CN114871697A (en) | 2022-05-06 | 2022-05-06 | Machining method for deep-cavity special-shaped sensor hole of cast iron cylinder cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114871697A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201997768U (en) * | 2011-01-24 | 2011-10-05 | 重庆市金泽鑫科技有限公司 | Micro drill bit for printed circuit board (PCB) drill hole |
| CN103612067A (en) * | 2013-11-14 | 2014-03-05 | 沈阳飞机工业（集团）有限公司 | High-precision reaming method for aluminium alloy and multi-layer titanium-alloy-interlayer semi-closed structure |
| CN104551091A (en) * | 2014-12-15 | 2015-04-29 | 贵州黎阳航空动力有限公司 | Method for machining small deep hole of part by using peck type variable speed drilling |
| 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 |
| US20200261989A1 (en) * | 2019-02-19 | 2020-08-20 | Kennametal Inc. | Drill and method for processing a workpiece |
| CN112008101A (en) * | 2020-07-16 | 2020-12-01 | 上海航天精密机械研究所 | Drilling method for ultra-deep long hole |
| CN113333805A (en) * | 2021-06-24 | 2021-09-03 | 中国航发中传机械有限公司 | Variable-section multi-layer intermittent deep hole machining method |
-
2022
- 2022-05-06 CN CN202210485955.5A patent/CN114871697A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201997768U (en) * | 2011-01-24 | 2011-10-05 | 重庆市金泽鑫科技有限公司 | Micro drill bit for printed circuit board (PCB) drill hole |
| CN103612067A (en) * | 2013-11-14 | 2014-03-05 | 沈阳飞机工业（集团）有限公司 | High-precision reaming method for aluminium alloy and multi-layer titanium-alloy-interlayer semi-closed structure |
| CN104551091A (en) * | 2014-12-15 | 2015-04-29 | 贵州黎阳航空动力有限公司 | Method for machining small deep hole of part by using peck type variable speed drilling |
| US20200261989A1 (en) * | 2019-02-19 | 2020-08-20 | Kennametal Inc. | Drill and method for processing a workpiece |
| 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 |
| CN112008101A (en) * | 2020-07-16 | 2020-12-01 | 上海航天精密机械研究所 | Drilling method for ultra-deep long hole |
| CN113333805A (en) * | 2021-06-24 | 2021-09-03 | 中国航发中传机械有限公司 | Variable-section multi-layer intermittent deep hole machining method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206869474U (en) | Bore the positioner of three dimensions angle inclined hole | |
| CN110142607B (en) | Method for processing inclined hole | |
| CN109128723B (en) | Method for machining V-shaped through lightening hole of crankshaft connecting rod neck | |
| CN114871697A (en) | Machining method for deep-cavity special-shaped sensor hole of cast iron cylinder cover | |
| CN105945520B (en) | A kind of cross holes thin wall special-shaped inner hole of cylinder processing method | |
| CN207787730U (en) | Compound tool for boring bore hole and end face annular groove processing | |
| CN216421177U (en) | Deep hole straight flute drill bit | |
| CN105302060B (en) | A kind of interior rotary surface orthogonal turn-milling process tool length compensation algorithm | |
| CN206425567U (en) | A kind of process tool of big depth-to-width ratio groove | |
| CN214023643U (en) | Round pin centering double-limit side pressure locking crown drill bit | |
| CN211162262U (en) | PCD thread milling cutter for thread processing | |
| CN112676765A (en) | Inner spherical surface machining process | |
| CN206492963U (en) | A kind of double end centre drill | |
| CN206492962U (en) | A kind of straight fluted drill | |
| CN201572925U (en) | High-precision hole processing, drilling and boring knife tool | |
| CN220698264U (en) | End face deep hole V-shaped groove processing cutter | |
| CN111633225A (en) | Large aperture ratio eccentric boring cutter | |
| CN210937523U (en) | Angle staggered tooth cutter head | |
| CN213646598U (en) | Cutter for numerical control machining of exhaust plug hole of casting mold and numerical control machine tool | |
| CN217964926U (en) | Welding PCD type violent drill bit for processing large-diameter through hole | |
| CN112453450B (en) | Cutter for processing thrust surface of diesel engine cylinder block and processing method thereof | |
| CN214023645U (en) | Round pin centering double-limit side pressure locking tooth crown tool bit | |
| CN217570886U (en) | Device for machining groove of pipe hole | |
| CN220970784U (en) | Step cutter for processing inner step hole | |
| CN112621132B (en) | Method for processing special-shaped face hole of casting and casting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |