CN104923872B - Single-crystal hollow blade electric spark electrolysis composite hole manufacturing method - Google Patents

Single-crystal hollow blade electric spark electrolysis composite hole manufacturing method Download PDF

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Publication number
CN104923872B
CN104923872B CN201510355873.9A CN201510355873A CN104923872B CN 104923872 B CN104923872 B CN 104923872B CN 201510355873 A CN201510355873 A CN 201510355873A CN 104923872 B CN104923872 B CN 104923872B
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China
Prior art keywords
implant
filler
hollow blade
binding agent
weight
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CN201510355873.9A
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Chinese (zh)
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CN104923872A (en
Inventor
柳万珠
梁养民
彭颖
王�琦
强美宁
王颖
谢国印
陈娟娟
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AECC Aviation Power Co Ltd
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XIAN AVIATION POWER CO Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23HWORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H9/00Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects
    • B23H9/14Making holes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23HWORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H5/00Combined machining
    • B23H5/02Electrical discharge machining combined with electrochemical machining

Abstract

The invention belongs to the technology of electric spark electrolysis composite hole manufacturing, and relates to the improvement in an electric spark electrolysis composite hole manufacturing method. The method is characterized by including the following hole manufacturing steps of filler filling, electric spark-electrolysis composite hole manufacturing and filler removing. The invention provides the improved electric spark electrolysis composite hole manufacturing method, a remelting layer at the outlet end of an air film hole is thoroughly removed, and the pass percent of single-crystal hollow blade electric spark electrolysis composite manufactured holes is increased.

Description

A kind of single crystal hollow blade electric spark and electrolysis are combined method for drilling
Technical field
The invention belongs to the compound hole fabrication techniques of electric spark and electrolysis, are related to the improvement to the compound method for drilling of electric spark and electrolysis.
Background technology
With the fast development of advanced electromotor, the demand of single crystal hollow blade is increasing.Efficiently the monocrystalline of cooling is empty The general blade of lobus cardiacus piece need to process hundreds of air film holes, and Fig. 1 is the structural representation of certain type aero engine turbine blades.Figure In, 1a is the upper port of single crystal hollow blade, and 1b is the lower port of single crystal hollow blade, and 2 is the air film hole of single crystal hollow blade. Both at home and abroad the air film hole machined of single crystal hollow blade is typically processed using electro-hydraulic line, and electro-hydraulic beam hole fabrication techniques are a new generations One of single crystal turbine blade key manufacture, is mainly used in monocrystalline high-pressure turbine working blade, monocrystalline high-pressure turbine directing vane The processing of the special cooling structure micropores such as piece, monocrystalline high-pressure turbine outer shroud.Including blade Fine and Deep Hole, axially bored line and surface angle very Little inclined hole and group's hole machined, the especially processing in the cross connection hole between specific position hole and main channel.But electro-hydraulic line The inefficiency of processing, is difficult at present the batch production for meeting through engineering approaches.
Single crystal blade drilling process technology is proposed without remelted layer, flawless, after requiring without heat affected area " three nothings ", new skill Art, new technology constantly develop.The compound hole fabrication techniques research of National 863 project laser+electrolysis is precisely in order to improve single crystal blade Hole machined efficiency, meets " three nothings " and requires and set up.Just punching is carried out initially with electric spark, hole wall behind hole has been beaten and there is remelting Layer, causes 100% to scrap.Then remelted layer removal is carried out using the method for electrolysis.In the entrance point of air film hole, due in hole Wall is with the presence of sufficient electrolyte, and remelted layer removal effect is good;But in the port of export of air film hole, hole inwall is without abundance Electrolyte, has that remelted layer cannot be removed completely, makes the qualification rate of the compound drilling of electric spark and electrolysis less than 1%.
The content of the invention
The purpose of the present invention is:Propose that a kind of improved electric spark and electrolysis are combined method for drilling, thoroughly to eliminate air film The remelted layer at hole exits end, improves the qualification rate of the compound drilling of single crystal hollow blade electric spark and electrolysis.
The technical scheme is that:A kind of single crystal hollow blade electric spark and electrolysis are combined method for drilling, it is characterised in that: The step of drilling, is as follows:
1st, implant is irrigated:
1.1st, implant is prepared:Implant is made up of filler and binding agent mixing, and the weight of filler accounts for implant weight 25%~35%, balance of binding agent;Filler is mixed with butyl acrylate powder by the poly- base acrylic acid methyl ester. powder of first and constitutes, The weight of the poly- base acrylic acid methyl ester. powder of first accounts for the 40%~60% of filler weight, the poly- base acrylic acid methyl ester. powder of first and acrylic acid The granularity of butyl ester powder is 60 mesh~80 mesh;Binding agent is by methyl methacrylate and methacrylate ethylene glycol mixing group Into the weight of methacrylate ethylene glycol accounts for the 1%~3% of weight of binder, balance of methyl methacrylate;Implant Preparation steps be:Filler and binding agent first being prepared respectively, filler and binding agent then being weighed in proportion, binding agent is placed in clearly In clean glass, filler is placed into, with stainless steel bar 15min~20min is stirred;
1.2nd, implant is irrigated:Lower port 1b of single crystal hollow blade 1 is sealed with adhesive plaster, will be prepared by upper port 1a Implant injection single crystal hollow blade 1 inner chamber in, stand solidification 5min~10min;
2nd, the compound drilling of electric spark and electrolysis:
The blade of above-mentioned implant will be filled with, the compound drilling of electric spark and electrolysis is carried out in clamping to EDCM-7A type equipment, Drill process parameter setting is as follows:
Wire electrode:Diameter 0.3mm;
Electrolyte:NaNO3Solution, concentration is:3g/L~5g/L;
Pulse width:6 grades~10 grades;
Pulse spacing:8 grades~12 grades;
Processing electric current:6 grades~10 grades;
Servo feed:30%~50%;
The bottom dead time:4s~8s;
3rd, the removing of implant:
3.1st, heat:The single crystal hollow blade for having beaten hole is put in the box resistance-heated furnace of RT3-12 models, is heated up To 150 DEG C~200 DEG C, 1.5h~2h is incubated;
3.2nd, single crystal hollow blade is cleaned:Single crystal hollow blade is put into into KSJ-1012 type ultrasonic activation cleaning machines, clearly Washing liquid is distilled water, is warming up to 50 DEG C~60 DEG C, ultrasonic frequency vibratory 28KHZ~40KHZ, vibration washing time 30min~ 40min;Then take out and dried up with the compressed air of cleaning.
It is an advantage of the invention that:A kind of compound method for drilling of improved electric spark and electrolysis is proposed, air film is completely eliminated The remelted layer at hole exits end, improves the qualification rate of the compound drilling of single crystal hollow blade electric spark and electrolysis.One reality of the present invention Example is applied, be tests prove that, the qualification rate of the compound drilling of single crystal hollow blade electric spark and electrolysis is up to more than 95%.
Description of the drawings
Fig. 1 is the structural representation of certain type aero engine turbine blades.
Specific embodiment
The present invention is described in further details below.Referring to Fig. 1, a kind of compound system of single crystal hollow blade electric spark and electrolysis Hole method, it is characterised in that:The step of drilling, is as follows:
1st, implant is irrigated:
1.1st, implant is prepared:Implant is made up of filler and binding agent mixing, and the weight of filler accounts for implant weight 25%~35%, balance of binding agent;Filler is mixed with butyl acrylate powder by the poly- base acrylic acid methyl ester. powder of first and constitutes, first The weight of poly- base acrylic acid methyl ester. powder accounts for the 40%~60% of filler weight, the poly- base acrylic acid methyl ester. powder of first and acrylic acid fourth The granularity of ester powder is 60 mesh~80 mesh;Binding agent is made up of methyl methacrylate and the mixing of methacrylate ethylene glycol, The weight of methacrylate ethylene glycol accounts for the 1%~3% of weight of binder, balance of methyl methacrylate;Implant Preparation steps are:Filler and binding agent first being prepared respectively, filler and binding agent then being weighed in proportion, binding agent is placed in into cleaning Glass in, place into filler, with stainless steel bar stir 15min~20min;
1.2nd, implant is irrigated:Lower port 1b of single crystal hollow blade 1 is sealed with adhesive plaster, will be prepared by upper port 1a Implant injection single crystal hollow blade 1 inner chamber in, stand solidification 5min~10min;
2nd, the compound drilling of electric spark and electrolysis:
The blade of above-mentioned implant will be filled with, the compound drilling of electric spark and electrolysis is carried out in clamping to EDCM-7A type equipment, Drill process parameter setting is as follows:
Wire electrode:Diameter 0.3mm;
Electrolyte:NaNO3Solution, concentration is:3g/L~5g/L;
Pulse width:6 grades~10 grades;
Pulse spacing:8 grades~12 grades;
Processing electric current:6 grades~10 grades;
Servo feed:30%~50%;
The bottom dead time:4s~8s;
3rd, the removing of implant:
3.1st, heat:The single crystal hollow blade for having beaten hole is put in the box resistance-heated furnace of RT3-12 models, is heated up To 150 DEG C~200 DEG C, 1.5h~2h is incubated;
3.2nd, single crystal hollow blade is cleaned:Single crystal hollow blade is put into into KSJ-1012 type ultrasonic activation cleaning machines, clearly Washing liquid is distilled water, is warming up to 50 DEG C~60 DEG C, ultrasonic frequency vibratory 28KHZ~40KHZ, vibration washing time 30min~ 40min;Then take out and dried up with the compressed air of cleaning.
The present invention operation principle be:When processing monocrystalline hollow blade using electric spark and electrolysis combined machining method, in order to The purpose of the micro removal of air film hole inside remelted layer Electrolyzed Processing is reached, protective material is filled in blade inner chamber, stop electrolysis Quick loss of the liquid in air film hole exit, it is ensured that electrolyte is sufficient in the air film hole path amount of including, makes cell reaction fully, has Remove completely beneficial to the remelted layer of air film hole path lower end and exit.By experimental study, from this kind of protective material, can hinder Gear electrolyte effectively ensures that electrolyte fully occurs electrolysis in air film hole path anti-in the quick loss in air film hole exit Should.
Embodiment 1, certain model electromotor single crystal hollow blade, material DD5, using electric spark and electrolysis air film hole process In, the method for removing remelted layer with the method is as follows:
1st, implant is irrigated:
1.1st, implant is prepared:Implant is made up of filler and binding agent mixing, and the weight of filler accounts for implant weight 25%, balance of binding agent;Filler is mixed with butyl acrylate powder by the poly- base acrylic acid methyl ester. powder of first and constitutes, the poly- base third of first The weight of e pioic acid methyl ester powder accounts for the granularity of the 40% of filler weight, the poly- base acrylic acid methyl ester. powder of first and butyl acrylate powder For 60 mesh;Binding agent is made up of methyl methacrylate and the mixing of methacrylate ethylene glycol, methacrylate ethylene glycol Weight account for the 1% of weight of binder, balance of methyl methacrylate;The preparation steps of implant are:First prepare respectively and fill out Material and binding agent, then weigh in proportion filler and binding agent, and binding agent is placed in the glass of cleaning, place into filler, 15min is stirred with stainless steel bar;
1.2nd, implant is irrigated:The lower port of single crystal hollow blade is sealed with adhesive plaster, by upper port by filling out for preparing In filling the inner chamber of thing injection single crystal hollow blade, solidification 5min is stood;
2nd, the compound drilling of electric spark and electrolysis:
The blade of above-mentioned implant will be filled with, in clamping to EDCM-7A research and development modified model electrolysis installations electric spark is carried out The compound drilling of electrolysis, drill process parameter setting is as follows:
Wire electrode:Diameter 0.3mm;
Electrolyte:NaNO3Solution, concentration is:3g/L;
Pulse width:6 grades;
Pulse spacing:8 grades;
Processing electric current:6 grades;
Servo feed:30%;
The bottom dead time:4s;
3rd, the removing of implant:
3.1st, heat:The single crystal hollow blade for having beaten hole is put in the box resistance-heated furnace of RT3-12 models, is heated up To 150 DEG C, 1.5h is incubated;
3.2nd, single crystal hollow blade is cleaned:Single crystal hollow blade is put into into KSJ-1012 type ultrasonic activation cleaning machines, clearly Washing liquid is distilled water, is warming up to 50 DEG C, ultrasonic frequency vibratory 28KHZ, vibration washing time 30min;Then take out with cleaning Compressed air dry up.
Embodiment 2, certain model electromotor single crystal hollow blade, material DD99, using the complete air film hole of spark machined after, adopt The method for removing remelted layer with the method is as follows:
1st, implant is irrigated:
1.1st, implant is prepared:Implant is made up of filler and binding agent mixing, and the weight of filler accounts for implant weight 30%, balance of binding agent;Filler is mixed with butyl acrylate powder by the poly- base acrylic acid methyl ester. powder of first and constitutes, the poly- base third of first The weight of e pioic acid methyl ester powder accounts for the granularity of the 50% of filler weight, the poly- base acrylic acid methyl ester. powder of first and butyl acrylate powder For 70 mesh;Binding agent is made up of methyl methacrylate and the mixing of methacrylate ethylene glycol, methacrylate ethylene glycol Weight account for the 2% of weight of binder, balance of methyl methacrylate;The preparation steps of implant are:First prepare respectively and fill out Material and binding agent, then weigh in proportion filler and binding agent, and binding agent is placed in the glass of cleaning, place into filler, 17min is stirred with stainless steel bar;
1.2nd, implant is irrigated:The lower port of single crystal hollow blade is sealed with adhesive plaster, by upper port by filling out for preparing In filling the inner chamber of thing injection single crystal hollow blade, solidification 7min is stood;
2nd, the compound drilling of electric spark and electrolysis:
The blade of above-mentioned implant will be filled with, in clamping to EDCM-7A research and development modified model electrolysis installations electric spark is carried out The compound drilling of electrolysis, drill process parameter setting is as follows:
Wire electrode:Diameter 0.3mm;
Electrolyte:NaNO3Solution, concentration is:4g/L;
Pulse width:8 grades;
Pulse spacing:10 grades;
Processing electric current:8 grades;
Servo feed:40%;
The bottom dead time:6s;
3rd, the removing of implant:
3.1st, heat:The single crystal hollow blade for having beaten hole is put in the box resistance-heated furnace of RT3-12 models, is heated up To 170 DEG C, 1.7h is incubated;
3.2nd, single crystal hollow blade is cleaned:Single crystal hollow blade is put into into KSJ-1012 type ultrasonic activation cleaning machines, clearly Washing liquid is distilled water, is warming up to 55 DEG C, ultrasonic frequency vibratory 34KHZ, vibration washing time 35min;Then take out with cleaning Compressed air dry up.
Embodiment 3, certain model electromotor single crystal hollow blade, material DD6, using the complete air film hole of spark machined after, adopt The method for removing remelted layer with the method is as follows:
1st, implant is irrigated:
1.1st, implant is prepared:Implant is made up of filler and binding agent mixing, and the weight of filler accounts for implant weight 35%, balance of binding agent;Filler is mixed with butyl acrylate powder by the poly- base acrylic acid methyl ester. powder of first and constitutes, the poly- base third of first The weight of e pioic acid methyl ester powder accounts for the granularity of the 60% of filler weight, the poly- base acrylic acid methyl ester. powder of first and butyl acrylate powder For 80 mesh;Binding agent is made up of methyl methacrylate and the mixing of methacrylate ethylene glycol, methacrylate ethylene glycol Weight account for the 3% of weight of binder, balance of methyl methacrylate;The preparation steps of implant are:First prepare respectively and fill out Material and binding agent, then weigh in proportion filler and binding agent, and binding agent is placed in the glass of cleaning, place into filler, 20min is stirred with stainless steel bar;
1.2nd, implant is irrigated:The lower port of single crystal hollow blade is sealed with adhesive plaster, by upper port by filling out for preparing In filling the inner chamber of thing injection single crystal hollow blade, solidification 10min is stood;
2nd, the compound drilling of electric spark and electrolysis:
The blade of above-mentioned implant will be filled with, in clamping to EDCM-7A research and development modified model electrolysis installations electric spark is carried out The compound drilling of electrolysis, drill process parameter setting is as follows:
Wire electrode:Diameter 0.3mm;
Electrolyte:NaNO3Solution, concentration is:5g/L;
Pulse width:10 grades;
Pulse spacing:12 grades;
Processing electric current:10 grades;
Servo feed:50%;
The bottom dead time:8s;
3rd, the removing of implant:
3.1st, heat:The single crystal hollow blade for having beaten hole is put in the box resistance-heated furnace of RT3-12 models, is heated up To 200 DEG C, 2h is incubated;
3.2nd, single crystal hollow blade is cleaned:Single crystal hollow blade is put into into KSJ-1012 type ultrasonic activation cleaning machines, clearly Washing liquid is distilled water, is warming up to 60 DEG C, ultrasonic frequency vibratory 40KHZ, vibration washing time 40min;Then take out with cleaning Compressed air dry up.

Claims (1)

1. a kind of single crystal hollow blade electric spark and electrolysis are combined method for drilling, it is characterised in that:The step of drilling, is as follows:
1.1st, implant is irrigated:
1.1.1, prepare implant:Implant is made up of filler and binding agent mixing, and the weight of filler accounts for implant weight 25%~35%, balance of binding agent;Filler is mixed with butyl acrylate powder by the poly- base acrylic acid methyl ester. powder of first and constitutes, first The weight of poly- base acrylic acid methyl ester. powder accounts for the 40%~60% of filler weight, the poly- base acrylic acid methyl ester. powder of first and acrylic acid fourth The granularity of ester powder is 60 mesh~80 mesh;Binding agent is made up of methyl methacrylate and the mixing of methacrylate ethylene glycol, The weight of methacrylate ethylene glycol accounts for the 1%~3% of weight of binder, balance of methyl methacrylate;Implant Preparation steps are:Filler and binding agent first being prepared respectively, filler and binding agent then being weighed in proportion, binding agent is placed in into cleaning Glass in, place into filler, with stainless steel bar stir 15min~20min;
1.1.2, perfusion implant:The lower port (1b) of single crystal hollow blade (1) is sealed with adhesive plaster, will be matched somebody with somebody by upper port (1a) In the inner chamber of implant injection single crystal hollow blade (1) for making, solidification 5min~10min is stood;
1.2nd, the compound drilling of electric spark and electrolysis:
The blade of above-mentioned implant will be filled with, in clamping to EDCM-7A research and development modified model electrolysis installations electric spark and electrolysis are carried out Compound drilling, drill process parameter setting is as follows:
Wire electrode:Diameter 0.3mm;
Electrolyte:NaNO3Solution, concentration is:3g/L~5g/L;
Pulse width:6 grades~10 grades;
Pulse spacing:8 grades~12 grades;
Processing electric current:6 grades~10 grades;
Servo feed:30%~50%;
The bottom dead time:4s~8s;
1.3rd, the removing of implant:
1.3.1, heat:The single crystal hollow blade for having beaten hole is put in the box resistance-heated furnace of RT3-12 models, is warming up to 150 DEG C~200 DEG C, it is incubated 1.5h~2h;
1.3.2, single crystal hollow blade is cleaned:Single crystal hollow blade is put into into KSJ-1012 type ultrasonic activation cleaning machines, is cleaned Liquid is distilled water, is warming up to 50 DEG C~60 DEG C, ultrasonic frequency vibratory 28KHZ~40KHZ, vibration washing time 30min~ 40min;Then take out and dried up with the compressed air of cleaning.
CN201510355873.9A 2015-06-24 2015-06-24 Single-crystal hollow blade electric spark electrolysis composite hole manufacturing method Active CN104923872B (en)

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CN201510355873.9A CN104923872B (en) 2015-06-24 2015-06-24 Single-crystal hollow blade electric spark electrolysis composite hole manufacturing method

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Application Number Priority Date Filing Date Title
CN201510355873.9A CN104923872B (en) 2015-06-24 2015-06-24 Single-crystal hollow blade electric spark electrolysis composite hole manufacturing method

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CN104923872A CN104923872A (en) 2015-09-23
CN104923872B true CN104923872B (en) 2017-04-19

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Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003205429A (en) * 2002-01-07 2003-07-22 Mitsutoyo Corp Integrated apparatus for electric discharge machining and electrolytic polishing
JP4470827B2 (en) * 2005-07-20 2010-06-02 株式会社デンソー Composite processing apparatus and processing method using the same
DE102008043619A1 (en) * 2008-11-10 2010-05-12 Robert Bosch Gmbh Method for manufacturing workpiece, involves producing through-hole by electro-chemical clearing, and accomplishing flow calibration during manufacturing of through-hole in workpiece by electro-chemical clearing
CN102335789A (en) * 2011-11-11 2012-02-01 沈阳黎明航空发动机(集团)有限责任公司 Device and method for removing re-melting layers on inner walls of air film holes of blades
CN102861956B (en) * 2012-09-20 2014-06-18 清华大学 Machining method of gravity-free smelting layer air membrane hole of aviation engine turbine blade
CN103386521B (en) * 2013-07-02 2015-09-09 南京航空航天大学 Micro-hole electric spark-electrolytic combination processing multichannel symmetry rushes liquid device and method
CN103480926B (en) * 2013-09-10 2016-06-01 南京航空航天大学 The synchronous combined machining method in the different district of micro-hole electric spark-electrolysis and special tool thereof
CN103611994B (en) * 2013-11-21 2016-08-31 南京航空航天大学 Complex-curved list without recast layer/group hole Multi-station electrical spark-electrolytic machine tool

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Address after: Weiyang Xu Jia Wan 710021 Shaanxi city of Xi'an Province

Patentee after: AVIC AVIATION ENGINE CORPORATION PLC

Address before: Weiyang Xu Jia Wan 710021 Shaanxi city of Xi'an Province

Patentee before: Xian Aviation Power Co., Ltd.

Address after: Weiyang Xu Jia Wan 710021 Shaanxi city of Xi'an Province

Patentee after: AECC AVIATION POWER CO., LTD.

Address before: Weiyang Xu Jia Wan 710021 Shaanxi city of Xi'an Province

Patentee before: AVIC AVIATION ENGINE CORPORATION PLC

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