CN115464340A - Electrode manufacturing method for processing oval deep hole - Google Patents
Electrode manufacturing method for processing oval deep hole Download PDFInfo
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- CN115464340A CN115464340A CN202211124239.0A CN202211124239A CN115464340A CN 115464340 A CN115464340 A CN 115464340A CN 202211124239 A CN202211124239 A CN 202211124239A CN 115464340 A CN115464340 A CN 115464340A
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- deep hole
- hole machining
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 238000012545 processing Methods 0.000 title description 6
- 238000003754 machining Methods 0.000 claims abstract description 30
- 238000010438 heat treatment Methods 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 17
- 238000000576 coating method Methods 0.000 claims abstract description 13
- 239000011248 coating agent Substances 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 5
- 238000004080 punching Methods 0.000 claims description 5
- 238000001125 extrusion Methods 0.000 abstract description 5
- 238000005336 cracking Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 241001347978 Major minor Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
The invention relates to the field of electrochemical deep hole machining, and discloses an electrode manufacturing method for oval deep hole machining, which comprises the following steps: s1: preparing an electrode having a circular cross section; s2: preparing a constant-temperature heating platform, wherein the platform can be uniformly stressed to move, the distance can be controlled to change under the multiple of 0.1mm, and the temperature of the heating platform is determined according to the temperature corresponding to the thermal expansion coefficient of the circular electrode coating material; s3: the end part of the round electrode is selected to be processed into an oval length, and then the height of the heating platform is well corresponded according to the length; s4: and then extruding the end part of the circular electrode to prepare the electrode with the oval end part, wherein the electrode manufacturing method for oval deep hole machining solves the problems of coating cracking and uncontrollable electrode port shape caused by volume expansion of the circular electrode in the extrusion deformation process.
Description
Technical Field
The invention relates to the field of electrochemical deep hole machining, in particular to a method for manufacturing an electrode for machining an oval deep hole.
Background
STEM, an Electrolytic deep Hole Machining technique, called tube electrochemical Machining (Shaped Hole electrochemical Machining), uses a hollow metal tube with an insulating coating protecting the outer wall as a tool cathode, uses a workpiece as an anode, and flows in electrolyte from the hollow tube electrode at a high speed and flows out from a Machining gap. Meanwhile, the cathode makes a feeding motion relative to the anode, the anode workpiece is dissolved, an electrolytic product is discharged from the gap along with the electrolyte, and finally the workpiece is dissolved to form a hole shape, so that the shape of the hole can be ensured, and the roughness of the hole can also be ensured. STEM deep holes are one technique used for machining cooling holes of engine blades, and are often round holes, various irregular holes, such as oval holes and bamboo joint holes. The application of the circular holes is common and can be directly realized by a circular tubular electrode, but the aperture of the circular holes which can be selected becomes smaller and the cooling effect is limited in consideration of the thinner trailing edge of the blade.
The design of elliptical hole can guarantee that the remaining wall thickness after punching is enough, can guarantee again that more air flow than the round hole passes through and reach good radiating effect. The elliptical holes are widely applied to the combustion engine blades of companies such as GE and Siemens. The invention discloses a simple manufacturing method of an elliptical electrode, which is a difficulty in machining elliptical holes. The elliptical electrode manufacturing is based on the treatment of a circular electrode, and the difficulty is to ensure that the electrode with the insulating coating is intact. General methods for making elliptical electrodes include one-step methods, e.g., 1) stamping; 2) A mold extrusion method; 3) Regular grooves are formed on two sides of the electrode; there are also multi-step processes. Bin Wei et al, who have studied the manufacture of non-circular deep holes, published two patents, U.S. Pat. No. 2009/0277803,103480930B, and described in detail therein a two-step process for machining circular holes from circular hole electrodes and then machining them into elliptical or non-circular holes, and a one-step process for machining both sides of the grooves. The one-step method provided by the invention is different from the two-side grooving one-step method, so that the instability caused during grooving processing and the risk of mechanical scratches on an insulating coating caused during grooving are reduced, and therefore, the electrode manufacturing method for elliptical deep hole processing is provided.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides an electrode manufacturing method for elliptical deep hole machining, which solves the problems.
(II) technical scheme
In order to achieve the above purpose, the invention provides the following technical scheme: an electrode manufacturing method for oval deep hole machining comprises the following steps:
s1: preparing an electrode having a circular cross section;
the outer diameter of the electrode with a circular cross section is 1.00mm-1.60mm.
S2: preparing a constant-temperature heating platform, wherein the platform can be uniformly stressed to move, the distance can be controlled to change under the multiple of 0.1mm, and the temperature of the heating platform is determined according to the temperature corresponding to the thermal expansion coefficient of the circular electrode coating material;
s3: selecting the end part of a round electrode to be processed into an oval length, and then corresponding to the height of the heating platform according to the length;
the length of the oval to be processed is 10CM, and the height of the heating platform is 12CM.
S4: then extruding the round electrode end to prepare an electrode with an oval end;
s5: and fixing the electrode with the oval end part in a guider, uniformly punching the oval end part on a deep hole machining electrochemical machine tool, wherein the punched shape is oval, and finally preparing the electrode with the oval deep hole.
The size of the elliptical hole is 0.96-1.67/1.48-2.49mm, the length-to-short axis ratio is 1.49-1.54, and the depth is 70-100mm.
(III) advantageous effects
Compared with the prior art, the invention provides the electrode manufacturing method for the oval deep hole machining, which has the following beneficial effects:
1. the electrode manufacturing method for the oval deep hole machining solves the problems of coating breakage and uncontrollable electrode port shape caused by volume expansion of a round electrode in the extrusion deformation process.
2. According to the electrode manufacturing method for the oval deep hole machining, the electrode with the controllable oval sectional area can be manufactured through the constant temperature bed for preheating the electrode and the lathe with the uniform stress and the controllable interval.
3. The electrode manufactured by the method is high in repeatability, and the electrode and the round hole electrode can realize group hole machining together.
Drawings
FIG. 1 is a schematic cross-sectional view of a shaped electrode according to an embodiment of the present invention;
FIG. 2 is a schematic photographic view of the outer surface of a formed electrode in accordance with an embodiment of the present invention;
FIG. 3 is a schematic view of a formed electrode according to an embodiment of the present invention;
FIG. 4 is a schematic view of a forming hole according to an embodiment of the present invention;
FIG. 5 is a schematic view of a formed electrode according to an embodiment of the present invention;
FIG. 6 is a schematic view of a molded aperture in accordance with an embodiment of the present invention.
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 obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Referring to fig. 1-6, a method for manufacturing an electrode for elliptical deep hole machining includes the following steps:
the first embodiment is as follows: step 1: preparing a round electrode with the outer diameter of 1.60 mm;
and 2, step: preparing a constant-temperature heating platform, enabling the heating platform to move under uniform stress, controlling the distance to change under the multiple of 0.1mm, and determining the temperature of the heating platform according to the temperature corresponding to the thermal expansion coefficient of the coating material;
and step 3: selecting the height of the heating platform corresponding to the length of the oval part, for example, selecting the heating platform with the height of 12cm and the length of 10cm ensures that the extruded part of the electrode is heated uniformly, the stress extrusion is more uniform, and the extruded part becomes a regular oval port with the diameter of 1.00/1.96 mm;
and 4, step 4: and fixing the corresponding electrode in a specific guide, uniformly punching on a deep hole machining electrochemical machine tool, and finally preparing the electrode with the oval deep hole, wherein the size of the oval hole machined by the electrode is 1.67/2.49 mm, the calculated long-short axis ratio is 1.49, and the depth reaches 100mm.
The first embodiment is as follows: step 2: preparing a circular electrode with the outer diameter of 1.00 mm;
and 2, step: preparing a constant-temperature heating platform, uniformly moving under stress, and controlling the distance to change under the multiple of 0.1mm, wherein the temperature of the heating platform is determined according to the temperature corresponding to the thermal expansion coefficient of the coating material;
and 3, step 3: selecting the height of the heating platform corresponding to the length of the oval part, for example, selecting the heating platform with the height of 12cm and the length of 10cm ensures that the extruded part of the electrode is heated uniformly, the stress extrusion is more uniform, and the extruded part becomes a regular oval port of 0.62/1.19 mm;
and 4, step 4: and fixing the corresponding electrode in a specific guide, uniformly punching holes on a deep hole machining electrochemical machine tool, and finally preparing the electrode with the oval deep hole, wherein the size of the oval hole machined by the electrode is-0.96/-1.48 mm, the calculated major-minor axis ratio is 1.54, and the depth reaches 70mm.
The side surface of the electrode is uniform and has no crack and a coating with uniform thickness.
The proportion of the ellipse part in the long electrode is adjustable.
The size of the elliptical part can be selected in multiple stages, and the length of each stage can be adjusted.
The end of the tubular electrode is a uniform and symmetrical elliptical hole, and the insulating coatings on two sides are uniform and have no cracks except the cross section of the tubular electrode has no insulating coating.
The length of the electrode at the non-circular part is related to the processing depth of the elliptical hole, and the sizes of different ellipses relate to the sectional area of the electrode and the smoothness of slag discharge in the processing process.
And (4) combining the elliptical hole tubular electrode and the circular tubular electrode to perform group hole machining.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. The electrode manufacturing method for the oval deep hole machining is characterized by comprising the following steps of:
s1: preparing an electrode having a circular cross section;
s2: preparing a constant-temperature heating platform, wherein the platform can be uniformly stressed to move, the distance can be controlled to change under the multiple of 0.1mm, and the temperature of the heating platform is determined according to the temperature corresponding to the thermal expansion coefficient of the circular electrode coating material;
s3: selecting the end part of a round electrode to be processed into an oval length, and then corresponding to the height of the heating platform according to the length;
s4: then extruding the round electrode end to prepare an electrode with an oval end;
s5: and fixing the electrode with the oval end part in a guider, uniformly punching the oval end part on a deep hole machining electrochemical machine tool, wherein the punched shape is oval, and finally preparing the electrode with the oval deep hole.
2. The method for manufacturing an electrode for elliptical deep hole machining according to claim 1, wherein: the outer diameter of the electrode with the circular cross section in the S1 ranges from 1.00mm to 1.60mm.
3. The method for manufacturing an electrode for elliptical deep hole machining according to claim 1, wherein: the length of the oval required to be processed in the step S3 is 10CM, and the height of the heating platform is 12CM.
4. The method for manufacturing an electrode for elliptical deep hole machining according to claim 1, wherein: the size of the elliptical hole in the S5 is 0.96-1.67/1.48-2.49mm, the length-to-short axis ratio is 1.49-1.54, and the depth is 70-100mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211124239.0A CN115464340A (en) | 2022-09-15 | 2022-09-15 | Electrode manufacturing method for processing oval deep hole |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211124239.0A CN115464340A (en) | 2022-09-15 | 2022-09-15 | Electrode manufacturing method for processing oval deep hole |
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| CN115464340A true CN115464340A (en) | 2022-12-13 |
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| CN202211124239.0A Pending CN115464340A (en) | 2022-09-15 | 2022-09-15 | Electrode manufacturing method for processing oval deep hole |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1264326A (en) * | 1997-07-18 | 2000-08-23 | 科西马国际公司 | Hydroforming of tubular blank having oval cross section and hydroforming apparatus |
| US20030006137A1 (en) * | 2001-01-23 | 2003-01-09 | General Electric Company | Electrode for electrochemical machining |
| CN1406395A (en) * | 2000-12-26 | 2003-03-26 | 松下电器产业株式会社 | Square battery container, method of manufacturing the container, and square battery using the container |
| KR20050085320A (en) * | 2005-06-03 | 2005-08-29 | 스미토모 긴조쿠 고교 가부시키가이샤 | Electrode for electric discharge machining and electric discharge machine for roll and machining method |
| CN101387720A (en) * | 2008-10-28 | 2009-03-18 | 长飞光纤光缆有限公司 | Method of manufacturing polarization maintaining optical fiber |
| US20090277803A1 (en) * | 2008-05-12 | 2009-11-12 | General Electric Company | Method and tool for forming non-circular holes using a selectively coated electrode |
| CN105923988A (en) * | 2016-05-12 | 2016-09-07 | 宁波大学 | Extruding preparation method of elliptical core polarization maintaining optical fiber perform rod with ellipticity adjustable at random |
| CN107874800A (en) * | 2017-11-13 | 2018-04-06 | 丽水市正明机械科技有限公司 | A kind of preparation method of the operation suture thread of anti-skid |
| CN113510324A (en) * | 2021-07-09 | 2021-10-19 | 西安工业大学 | Electrode for deep hole machining of electric melting explosion |
-
2022
- 2022-09-15 CN CN202211124239.0A patent/CN115464340A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1264326A (en) * | 1997-07-18 | 2000-08-23 | 科西马国际公司 | Hydroforming of tubular blank having oval cross section and hydroforming apparatus |
| CN1406395A (en) * | 2000-12-26 | 2003-03-26 | 松下电器产业株式会社 | Square battery container, method of manufacturing the container, and square battery using the container |
| US20030006137A1 (en) * | 2001-01-23 | 2003-01-09 | General Electric Company | Electrode for electrochemical machining |
| KR20050085320A (en) * | 2005-06-03 | 2005-08-29 | 스미토모 긴조쿠 고교 가부시키가이샤 | Electrode for electric discharge machining and electric discharge machine for roll and machining method |
| US20090277803A1 (en) * | 2008-05-12 | 2009-11-12 | General Electric Company | Method and tool for forming non-circular holes using a selectively coated electrode |
| CN101387720A (en) * | 2008-10-28 | 2009-03-18 | 长飞光纤光缆有限公司 | Method of manufacturing polarization maintaining optical fiber |
| CN105923988A (en) * | 2016-05-12 | 2016-09-07 | 宁波大学 | Extruding preparation method of elliptical core polarization maintaining optical fiber perform rod with ellipticity adjustable at random |
| CN107874800A (en) * | 2017-11-13 | 2018-04-06 | 丽水市正明机械科技有限公司 | A kind of preparation method of the operation suture thread of anti-skid |
| CN113510324A (en) * | 2021-07-09 | 2021-10-19 | 西安工业大学 | Electrode for deep hole machining of electric melting explosion |
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